Patent Application
20210138873
The present invention relates to a deterioration diagnosis device, a deterioration diagnosis method and a deterioration diagnosis program.
An inspection method of an air conditioner for a vehicle is currently a periodic inspection. A railway service provider is considering application of an inspection method called a deterioration diagnosis in addition to the periodic inspection. The deterioration diagnosis is a method to detect aging deterioration and abnormality of a vehicle air conditioner by analyzing status information of the vehicle air conditioner. The railway service provider tries to reduce the purchase and replacing costs, and to stabilize train operation by replacing devices or components in accordance with the age of an apparatus for each vehicle air conditioner, by applying the deterioration diagnosis.
Patent Literature 1 discloses a method to calculate a deterioration judgment reference value corresponding to a plurality of outdoor air temperature conditions at the time of initial operation of an air conditioner.
Patent Literature 2 discloses a method to judge deterioration by setting beforehand a criterion operation pattern indicating a valid operation state of a compressor of a vehicle air conditioner, and comparing an actual operation pattern obtained at the time when the compressor actually operates with the criterion operation pattern.
Patent Literature 3 discloses a method to judge a degree of deterioration of a freezer by comparing data in the first year with data measured in and after the second year of power consumption and an outside air temperature.
Patent Literature 1: JP2014-214970 A
Patent Literature 2: JP2007-083872 A
Patent Literature 3: JP2010-243092 A
The method disclosed in Patent Literature 1 is a method performed during actual operation of an air conditioner. In this method, since calculation of the deterioration judgment reference value is not completed until the plurality of outdoor air temperature conditions are met, time is required for calculation of the deterioration judgment reference value.
By the method disclosed in Patent Literature 2, since there is not pattern indicating a deterioration state in the criterion operation pattern, it is impossible to judge deterioration only by the comparison result.
By the method disclosed in Patent Literature 3, since there is no data indicating a deterioration state similarly as the method disclosed in Patent Literature 2, it is impossible to judge deterioration only by the comparison result.
The present invention is aimed at reducing the time required for calculation of a reference value to perform a deterioration diagnosis using data indicating a deterioration state.
A deterioration diagnosis device according to one aspect of the present invention includes:
an accumulation unit to accumulate operation data including an operation performance value being a performance value obtained by measuring a performance of an apparatus during actual operation, and one or more condition value indicating an environmental condition during the actual operation;
a calculation unit to acquire test data including a performance value before deterioration and a performance value after deterioration being performance values obtained by testing performances of the apparatus before deterioration and after deterioration, and one or more condition value indicating an environmental condition at a testing time, to estimate a performance of the apparatus during the actual operation under a same environmental condition as the environmental condition at the testing time based on the operation data accumulated by the accumulation unit, and to calculate a correction factor being a ratio between an estimate performance value being a performance value obtained by estimation and the performance value before deterioration; and
a diagnosis unit to acquire new operation data, to compare one performance value of an operation performance value included in the new operation data and the performance value after deterioration, with a product of another performance value and the correction factor so as to perform a deterioration diagnosis of the apparatus.
According to the present invention, a performance of an apparatus during actual operation under an environmental condition the same as an environmental condition at the time of a test is estimated. Then, in accordance with the performance estimated, a correction factor being a reference value to perform a deterioration diagnosis using data indicating a deterioration state is calculated. Thus, it is possible to reduce the time required for calculation of the correction factor.
Hereinafter, an embodiment of the present invention will be described using diagrams. In each diagram, same or corresponding parts are denoted by same signs. The explanation of the same or corresponding parts will be appropriately omitted or simplified in the description of the present embodiment. The present invention is not limited to the embodiment described below, and may be applied various alterations as needed. For example, the embodiment described below may be partially performed.
The present embodiment will be described using
***Explanation of Configuration***
The configuration of a deterioration diagnosis device 101 according to the present embodiment will be described with reference to
The deterioration diagnosis device 101 is a computer. The deterioration diagnosis device 101 is equipped with a processor 111, and further equipped with other hardware components such as a memory 112, a display interface 113 and a communication interface 114, etc. The processor 111 is connected to other hardware components via a signal line to control the other hardware components.
The deterioration diagnosis device 101 is equipped with an operation unit 102, a reception unit 103, an accumulation unit 104, a calculation unit 105, a storage unit 106 and a diagnosis unit 107, as functional components. The functions of the operation unit 102, the reception unit 103, the accumulation unit 104, the calculation unit 105, the storage unit 106 and the diagnosis unit 107 are realized by software.
The processor 111 is an IC to perform various processes. “IC” is an abbreviation for an integrated circuit. The processor 111 is, for example, a CPU. “CPU” is an abbreviation for a central processing unit.
The memory 112 stores operation data 201, and test data 301 and 401. The memory 112 is, for example, a flash memory or a RAM. “RAM” is an abbreviation for a random access memory.
The display interface 113 is connected to a display. The display is, for example, an LCD. “LCD” is an abbreviation for a liquid crystal display.
The communication interface 114 is connected to a dedicated line or a network. The communication interface 114 includes a receiver to receive data and a transmitter to transmit data. The communication interface 114 is, for example, a communication chip or an NIC. “NIC” is an abbreviation for a network interface card.
The deterioration diagnosis device 101 may be equipped with an input interface as a hardware component. The input interface is connected to an input device. The input device is, for example, a mouse, a keyboard or a touch panel.
The memory 112 stores a deterioration diagnosis program being a program to realize functions of the operation unit 102, the reception unit 103, the accumulation unit 104, the calculation unit 105, the storage unit 106 and the diagnosis unit 107. The deterioration diagnosis program is read into the processor 111, and executed by the processor 111. The memory 112 also stores an OS. “OS” is an abbreviation for an operating system. The processor 111 executes the deterioration diagnosis program while executing the OS. A part or all of the deterioration diagnosis program may be embedded into the OS.
The deterioration diagnosis program and the OS may be stored in an auxiliary storage device. The auxiliary storage device is, for example, a flash memory or an HDD. “HDD” is an abbreviation for a hard disk drive. The deterioration diagnosis program and the OS stored in the auxiliary storage device are loaded into the memory 112, and executed by the processor 111.
The deterioration diagnosis device 101 may include a plurality of processors to replace the processor 111. These plurality of processors share execution of the deterioration diagnosis program. Each processor is an integrated circuit to perform various processes similarly as the processor 111.
The information, data, signal values and variable values indicating results of processes of the operation unit 102, the reception unit 103, the accumulation unit 104, the calculation unit 105, the storage unit 106 and the diagnosis unit 107 are stored in the memory 112, the auxiliary storage device, or a resister or a cache memory inside the processor 111.
The deterioration diagnosis program may be stored in a portable record medium such as a magnetic disk or an optical disk.
A data format of the operation data 201 will be described with reference to
The operation data 201 is data including an operation performance value, and one or more condition values. The operation performance value is a performance value obtained by measuring performance of the apparatus during actual operation. The condition values included in the operation data 201 are values denoting environment conditions during actual operation.
The apparatus may be an arbitrary apparatus, whereas the apparatus is a vehicle air conditioner of a train in the present embodiment. Thus, in the present embodiment, the operation data 201 is data including status information of the vehicle air conditioner obtained during operation of the train. The status information of the vehicle air conditioner is information denoting the performance of the vehicle air conditioner, i.e., a performance value.
The operation data 201 includes an apparatus ID 202, a time 203 and a train operation 204. “ID” is an abbreviation for an identifier.
The apparatus ID 202 is a value denoting a serial number of the vehicle air conditioner. The time 203 is a value denoting a clock time when the performance of the vehicle air conditioner is measured. The train operation 204 is a value denoting that the performance of the vehicle air conditioner is measured during operation of the train.
The operation data 201 may include a value denoting an arbitrary environmental condition as a condition value, whereas in the present embodiment, the operation data 201 includes an atmospheric temperature 205, a door opening/closing state 206, a vehicle occupancy rate 207 and a running speed 208. As conditional values, values denoting conditions in accordance with specifications for each model of vehicle air conditioners such as an operation strength, set to an air conditioner may be included.
The atmospheric temperature 205 is a value denoting an outside air temperature of a vehicle whereon a vehicle air conditioner indicated by the apparatus ID 202 is mounted. The door opening/closing state 206 is a value denoting an opening/closing state of a door of the vehicle whereon the vehicle air conditioner denoted by the apparatus ID 202 is mounted. The vehicle occupancy rate 207 is a value denoting a ratio of the number of actual passengers to a fixed total number of the vehicle whereon the vehicle air conditioner indicated by the apparatus ID 202 is mounted. The running speed 208 is a value denoting a running speed of the vehicle whereon the vehicle air conditioner denoted by the apparatus ID 202 is mounted.
In the present embodiment, four condition values of the atmospheric temperature 205, the door opening/closing state 206, the vehicle occupancy rate 207 and the running speed 208 are used; however, one condition value may be used, or may be two, three, or equal to or more than five condition values may be used.
The operation data 201 may include a value denoting an arbitrary performance as a performance value, whereas, in the present embodiment, the operation data 201 may include a compressor current 209 and a refrigerant pressure 210.
The compressor current 209 is a current value of a compressor of the vehicle air conditioner indicated by the apparatus ID 202. The refrigerant pressure 210 is a value denoting a pressure of refrigerant gas inside the vehicle air conditioner denoted by the apparatus ID 202.
In the present embodiment, two performance values of the compressor current 209 and the refrigerant pressure 210 are used; however, only one performance value may be used, or three or more performance values may be used.
A data format of the test data 301 will be described with reference to
The test data 301 is data including a performance value before deterioration, and one or more condition values. The performance value before deterioration is a performance value obtained by testing a performance of an apparatus before deterioration. The condition value included in the test data 301 is a value denoting an environmental condition at the time of test.
The apparatus may be an arbitrary apparatus, whereas in the present embodiment, the apparatus is a vehicle air conditioner of a train as described above. Thus, in the present embodiment, the test data 301 is data including state information of the vehicle air conditioner obtained by taking the vehicle air conditioner at the time of a shipping test as a normal state.
The test data 301 includes an apparatus ID 302, the clock time 303, a shipping test 304 and a normal state 305.
The apparatus ID 302 is a value denoting a serial number of the vehicle air conditioner. The time 303 is a value denoting a clock time when a performance of the vehicle air conditioner is measured. The shipping test 304 is a value denoting that the performance of the vehicle air conditioner is measured at the time of the shipping test. The normal state 305 is a value denoting that the performance of the vehicle air conditioner is measured when the state of the vehicle air conditioner denoted by the apparatus ID 302 is in the normal state.
The test data 301 may include, as a condition value, a value denoting an environmental condition the same as or similar to the condition value included in the operation data 201, whereas in the present embodiment, the test data 301 includes a laboratory temperature 306.
The laboratory temperature 306 is a value denoting a temperature of a laboratory where the shipping test of the vehicle air conditioner denoted by the apparatus ID 302 is performed. The laboratory temperature 306 corresponds to the atmospheric temperature 205 included in the operation data 201.
While one condition value being the laboratory temperature 306 is used in the present embodiment, two or more condition values may be used.
It is necessary for the test data 301 to include, as a performance value, a value the same as or similar to a performance value included in the operation data 201, whereas in the present embodiment, the test data 301 includes the compressor current 307 and the refrigerant pressure 308.
The compressor current 307 is a current value of a compressor of the vehicle air conditioner denoted by the apparatus ID 302. The refrigerant pressure 308 is a value denoting a pressure of refrigerant gas inside the vehicle air conditioner denoted by the apparatus ID 302.
A data format of the test data 401 will be described with reference to
The test data 401 is data including a performance value after deterioration, and one or more condition values. The performance value after deterioration is a performance value obtained by testing a performance of an apparatus after deterioration. A condition value included in the test data 401 is a value denoting an environmental condition at the time of a test.
The apparatus may be an arbitrary apparatus, whereas in the present embodiment, the apparatus is the vehicle air conditioner of the train, as described above. Thus, the test data 401 is data including state information of the vehicle air conditioner obtained by taking the vehicle air conditioner under a deterioration state at the time of the shipping test.
The test data 401 includes an apparatus ID 402, a time 403, a shipping test 404 and a deterioration state 405.
The apparatus ID 402 is a value denoting a serial number of the vehicle air conditioner. The time 403 is a value denoting a clock time when a performance of the vehicle air conditioner is measured. The shipping test 404 is a value denoting that a performance of the vehicle air conditioner is measured at the time of the shipping test. The deterioration state 405 is a value denoting that the performance of the vehicle air conditioner is measured when the state of the vehicle air conditioner denoted by the apparatus ID 402 is a deterioration state. At the time of the shipping test, the deterioration state of the vehicle air conditioner is simulated.
It is necessary for the test data 401 to include, as a condition value, a value denoting an environmental condition the same as or similar to a condition value included in the operation data 201, whereas in the present embodiment, the test data 401 includes a laboratory temperature 406.
The laboratory temperature 406 is a value denoting a temperature of a laboratory where the shipping test of the vehicle air conditioner denoted by the apparatus ID 402 is performed. The laboratory temperature 406 corresponds to the atmospheric temperature 205 included in the operation data 201.
While one condition value being the laboratory temperature 406 is used in the present embodiment, two or more condition values may be used.
It is necessary for the test data 401 to include, as a performance value, a value denoting a performance the same as or similar to a performance value included in the operation data 201, whereas in the present embodiment, the test data 401 includes a compressor current 407 and a refrigerant pressure 408.
The compressor current 407 is a current value of a compressor of the vehicle air conditioner denoted by the apparatus ID 402. The refrigerant pressure 408 is a value denoting a pressure of refrigerant gas inside the vehicle air conditioner denoted by the apparatus ID 402.
The test data 401 further includes a deterioration degree 409.
The deterioration degree 409 is a value denoting a degree of deterioration at the time when the deterioration state of the vehicle air conditioner denoted by the apparatus ID 402 is simulated.
***Explanation of Operation***
The operation of the deterioration diagnosis device 101 according to the present embodiment will be described with reference to
In the operation described below, the operation unit 102 displays an operation screen to accept operation by a user on a display with the display interface 113. The reception unit 103 receives state information of the vehicle air conditioner obtained during operation of a train and at the time of a shipping test from outside of the deterioration diagnosis device 101. The accumulation unit 104 stores the state information received by the reception unit 103 by using the memory 112. The calculation unit 105 accesses the memory 112, and retrieves the state information of the vehicle air conditioner obtained in the normal state and the deterioration state at the time of the shipping test, and the state information of the vehicle air conditioner obtained during the operation of the train. The calculation unit 105 generates a reference value of the state information to determine whether the vehicle air conditioner is in the normal state or the deterioration state from the state information retrieved. The storage unit 106 stores the reference value generated by the calculation unit 105 by using the memory 112. The diagnosis unit 107 accesses the memory 112, and retrieves the state information of the vehicle air conditioner obtained during the operation of the train, and the reference value of the state information. The diagnosis unit 107 judges whether the vehicle air conditioner is in the normal state or in the deterioration state by comparing the state information retrieved and the reference value.
In the shipping test, the performance of the vehicle air conditioner is measured beforehand in each state of a normal state and a state simulating deterioration. Simulation of deterioration is performed specifically through simulating filter clogging by blocking a ventilation port, or simulating leakage of refrigerant gas by venting the refrigerant gas. The degree of deterioration is determined by a rate at which the ventilation port is blocked, and a rate of a filling amount of the refrigerant gas. Performance values denoting the performance measured are included in test data 301 and 401.
In a step S501 and a step S502 of
In steps from a step S601 through a step S603 of
In steps from a step S701 through a step S703 of
In a step S604 and a step S605 of
Next, state information of the vehicle air conditioner during train operation is stored.
In a step S606 and a step S607 of
In steps from a step S704 through a step S706 of
In a step S608 of
As described above, in the step S705, the accumulation unit 104 accumulates the operation data 201.
Next, a correction factor for comparing state information at the time of train operation and the time of the shipping test.
In a step S504 and a step S505 of
In a step S801 and a step S802 of
In a step S804 of
In a step S806 of
In a step S808 of
In steps from a step S901 through a step S903 of
In a step S804 of
In a step S810 of
In a step S812 of
In a step S813 of
The approximate curve is created by general linear approximation, exponential approximation, logarithmic approximation, polynomial approximation, or power approximation. A case having a highest R2 value is selected. An R2 value is a value between 0 and 1 representing how much an estimate value of the approximate curve is close to actual data.
In a step S814 of
In a step S816 of
In steps from a step S904 through a step S906 of
In a step S810 of
In a step S818 of
In a step S820 of
In a step S821 of
In a step S822 of
In a step S824 of
In steps from a step S907 through a step S909 of
In a step S818 of
In a step S826 of
In the step S707 and the step S708 of
In a step S828 of
In a step S829 of
In a step S830 of
In a step S832 of
In steps from a step S910 through a step S912 of
In order to simplify explanation, in the step S826 of
In an inspection of a train before business operation, by performing an operation check of the vehicle air conditioner, it is possible to make operation data 201 that meets all the three conditions that the door opening/closing state 206 is closing, the vehicle occupancy rate 207 is 0%, and the running speed 208 is 0 km/h exist without fail. In such a case, it is possible to omit the steps from the step S818 through the step S833.
As described above, in the step S802, the calculation unit 105 obtains the test data 301. In the step S804, the step S806, the step S810, the steps from the step S812 through the step S814, the step S818, the steps from the step S820 through the step S822, the step S826 and the steps from the step S828 through the step S830, the calculation unit 105 estimates performance of the apparatus during an actual operation under an environmental condition the same as the environmental condition at the time of a test based on the operation data 201 accumulated by the accumulation unit 104. In the step S807, the step S815, the step S823 and the step S831, the calculation unit 105 calculates a correction factor being a ratio between an estimate performance value being the performance value obtained by estimation and a performance value before deterioration. The larger the accumulated amount of the operation data 201 used for estimation of the performance is, the more the accuracy of a correction factor that is calculated can be increased; however, in the present embodiment, it is possible to calculate a correction factor of a sufficient accuracy even with the accumulated amount in a short period of time of about six months to one year.
When there is operation data 201 wherein at least one condition value coincides with that of the test data 301 in the operation data 201 accumulated by the accumulation unit 104, in the step S806, the step S814, the step S822 and the step S830, the calculation unit 105 determines an estimate performance value based on the operation data 201 whereof at least one condition values coincide with one another, in the relevant operation data 201.
When there is operation data 201 wherein all the condition values coincide with those of the test data 301 among the operation data 201 accumulated by the accumulation unit 104, in the step S806, the calculation unit 105 determines as the estimate performance value an operation performance value included in the relevant operation data 201.
Meanwhile, when there is no operation data 201 wherein all the condition values coincide with those of the test data 301 in the operation data 201 accumulated by the accumulation unit 104, in the steps from the step S812 through the step S814, the steps from the step S820 through the step S822, and the steps from the step S828 through the step S830, the calculation unit 105 analyzes a correlation between the condition values included in the operation data 201 accumulated by the accumulation unit 104 and the operation performance value, and calculates an estimate performance value.
In the present embodiment, the operation data 201 accumulated by the accumulation unit 104 and the test data 301 and 401 respectively include a first condition value being the condition value indicating one type of an environmental condition. When there is no operation data 201 wherein the first condition value coincides with that of the test data 301 in the operation data 201 accumulated by the accumulation unit 104, in the step S814, in the step S822 and the step S830, the calculation unit 105 calculates an approximate value of an operation performance value corresponding to the first condition value included in the test data 301 as an estimate performance value on an approximate curve representing the correlation between the first condition value included in the operation data 201 accumulated by the accumulation unit 104 and the operation performance value.
As a concrete example, the atmospheric temperature 205 of the operation data 201 and the laboratory temperature 306 of the test data 301 respectively correspond to the first condition values. When there is no operation data 201 wherein the atmospheric temperature 205 coincides with the laboratory temperature 306 in the operation data 201 accumulated by the accumulation unit 104, in the step S814, the calculation unit 105 calculates an approximate value of compressor current corresponding to the laboratory temperature 306 included in the test data 301 as an estimate performance value on an approximate curve representing a correlation between the atmospheric temperature 20 included in the operation data 201 accumulated by the accumulation unit 104, and the compressor current 209. The calculation unit 105 also calculates an approximate value of refrigerant pressure corresponding to the laboratory temperature 306 included in the test data 301 as an estimate performance value on an approximate curve representing a correlation between the atmospheric temperature 205 included in the operation data 201 accumulated by the accumulation unit 104 and the refrigerant pressure 210.
Lastly, deterioration diagnosis of the vehicle air conditioner is performed.
In a step S507 and a step S508 of
In steps from a step S1001 through a step S1003 of
In the step S1002 of
In the step S1004 of
In the step S1006 of
In order to simplify explanation, in the step S1008 of
In a step S1010 and a step S1011 of
By the data read in the manner as described above, state information obtained during train operation is corrected.
In a step S1012 and a step S1013 of
In a step S1014 of
In a step S1015 and a step S1016 of
In a step S509 and a step S510 of
As described above, in a step S1010, the diagnosis unit 107 obtains new operation data 201. In a step S1016 and a step S1017, the diagnosis unit 107 compares one performance value of an operation performance value included in the new operation data 201 and a performance value after deterioration with a product of the other performance value and a correction factor, so as to perform a deterioration diagnosis of the apparatus. In the present embodiment, the calculation unit 105 calculates the correction factor by dividing the performance value before deterioration by the estimate performance value. Therefore, the diagnosis unit 107 performs a deterioration diagnosis of the apparatus by comparing the performance value after deterioration with the product of the operation performance value included in the new operation data 201 and the correction factor, and. As a variation, the calculation unit 105 may calculate a correction factor by dividing the estimate performance value by the performance value before deterioration. In such a case, the diagnosis unit 107 performs a deterioration diagnosis of the apparatus by comparing the operation performance value included in the new operation data 201 with the product of the performance value after deterioration and the correction factor.
As described above, in the step S804, there is a case wherein the operation data 201 obtained during train operation does not include operation data 201 that meets all four conditions that the atmospheric temperature 205 is equal to the laboratory temperature 306, the door opening/closing state 206 is closing, the vehicle occupancy rate 207 is 0%, and the running speed 208 is 0 km/h. In such a case, by taking operation data 201 wherein only one condition is different as an object, an approximate curve of state information for the one different condition is created, and state information in a case wherein the one condition is met is estimated. However, as a variation, it is here assumed that there is no operation data 201 wherein the number of different conditions is only one. In this example, by taking operation data 201 wherein only two conditions are different as an object, approximate curves of state information respectively for the different two conditions are created in stages, and state information in a case wherein those two conditions are met is estimated. The “different two conditions” are selected in accordance with a priority determined beforehand. Here, as the “different two conditions,” a combination of the atmospheric temperature 205 and a vehicle occupancy rate 207 is selected first. The concrete procedure is as follows.
First, the calculation unit 105 identifies operation data 201 from the train operation 204 of the operation data 201 among the data accumulated by the accumulation unit 104, and selects operation data 201 wherein the door opening/closing state 206 is closing, the vehicle occupancy rate 207 is 10%, and the running speed 208 is 0 km/h.
As well as the process of the step S812, the calculation unit 105 calculates mean values respectively of the compressor current 209 and the refrigerant pressure 210 for operation data 201 with a same atmospheric temperature 205 among the operation data selected.
As well as the process of the step S813, the calculation unit 105 creates approximate curves of mean values respectively of the compressor current 209 and the refrigerant pressure 210 for the atmospheric temperature 205.
As well as the process of the step S814, the calculation unit 105 specifies values respectively of compressor current and refrigerant pressure in a case wherein the atmospheric temperature is equal to the laboratory temperature 306 from the approximate curves created.
As described above, the calculation unit 105 calculates values respectively of compressor current and refrigerant pressure in a case wherein the atmospheric temperature is equal to the laboratory temperature 306 corresponding to a case wherein the vehicle occupancy rate 207 is 10%, by using the operation data 201 wherein the vehicle occupancy rate 207 is 10%. The calculation unit 105 calculates values respectively of compressor current and refrigerant pressure in a case wherein the atmospheric temperature is equal to the laboratory temperature 306 not only for a case wherein the vehicle occupancy rate 207 is 10%, but also in cases wherein the vehicle occupancy rate 207 is 20%, 30%, . . . , and 100%. The vehicle occupancy rate 207 may be set not in increments of 10%, but may be set in other increments, such as in increments of 1%, etc.
Next, the calculation unit 105 creates approximate curves of values respectively of compressor current and refrigerant pressure for the vehicle occupancy rate 207 from the values respectively of the compressor current and the refrigerant pressure calculated as described above.
As well as the process of the step S814, the calculation unit 105 specifies values respectively of compressor current and refrigerant pressure in a case wherein the vehicle occupancy rate 207 is 0% from the approximate curves created. Then, as well as the process of the step S815, the calculation unit 105 calculates a quotient of the compressor current 307 of the test data 301 and the value of the compressor current specified as a correction factor C5 of compressor current, and a quotient of the refrigerant pressure 308 of the test data 301 and the value of the refrigerant pressure specified as a correction factor C5.
The correction factors C5 can be used for a deterioration diagnosis of a vehicle air conditioner as well as the correction factors C1, C2, C3 and C4.
The operation data 201 accumulated by the accumulation unit 104, and the test data 301 and 401 respectively include condition values from a first condition value through a Nth condition value being condition values indicating different types of environmental conditions, N being an integer greater than one. When there is no operation data 201 wherein at least any of the condition values from the first condition value through a Mth condition value coincides with those of the test data 301 in the operation data 201 accumulated by the accumulation unit 104, by taking M as an integer equal to N, the calculation unit 105 groups operation data 201 wherein combinations of the condition values from the first condition value through a M-lth condition value coincides with one another among the operation data 201 accumulated by the accumulation unit 104. The calculation unit 105 performs a process to calculate approximate values of an operation performance value corresponding to the Mth condition value included in the test data 301 for each group on an approximate curve representing correlations between the Mth condition values included in the operation data 201 of each group and the operation performance value. Then, by taking M as an integer being decremented by one, the calculation unit 105 performs the process described above repeatedly until M becomes 1. The calculation unit 105 calculates an approximate value of the operation performance value corresponding to the first condition value included in the test data 301 as an estimate performance value on an approximate curve representing correlations between the first condition values included in the operation data 201 of each group in the last grouping and the approximate values of the operation performance value calculated for each group.
As a concrete example, the vehicle occupancy rate 207 of the operation data 201 and the vehicle occupancy rate of the test data 301 respectively correspond to the first condition values. It is supposed that a value of the vehicle occupancy rate in a shipping test is implicitly included in the test data 301 by assuming that the value of the vehicle occupancy rate is 0%, although the test data 301 does not explicitly include the value of the vehicle occupancy rate. The atmospheric temperature 205 of the operation data 201 and the laboratory temperature 306 of the test data 301 respectively correspond to second condition values. When the operation data 201 accumulated by the accumulation unit 104 does not include operation data 201 wherein at least any of the vehicle occupancy rate 207 and the atmospheric temperature 205 coincides with that of the test data 301, the calculation unit 105 groups operation data 201 wherein the vehicle occupancy rates 207 coincide with one another in the operation data 201 accumulated by the accumulation unit 104. The calculation unit 105 performs a process to calculate approximate values of compressor current corresponding to the laboratory temperature 306 included in the test data 301 for each group on an approximate curve representing correlations between the vehicle occupancy rates 207 included in the operation data of each group and the compressor current 209. The calculation unit 105 also performs a process to calculate approximate values of refrigerant pressure corresponding to the laboratory temperature 306 included in the test data 301 for each group on an approximate curve representing correlations between the vehicle occupancy rates 207 included in the operation data 201 of each group and the refrigerant pressure 210. The calculation unit 105 calculates approximate values of the operation performance value corresponding to a vehicle occupancy rate included in the test data 301 as estimate performance values on an approximate curve representing correlations between the vehicle occupancy rates included in the operation data 201 of each group in the last grouping and the approximate values of the compressor current calculated. The calculation unit 105 calculates approximate values of refrigerant pressure corresponding to a vehicle occupancy rate included in the test data 301 as estimate performance values on an approximate curve representing correlations between the vehicle occupancy rates included in the operation data 201 of each group in the last grouping and the approximate values of the refrigerant pressure calculated for each group.
***Explanation of Effect of Embodiment***
In the present embodiment, the performance of a vehicle air conditioner during actual operation under an environmental condition the same as an environmental condition at the time of a test is estimated. Then, in accordance with the performance estimated, a correction factor being a criterion value to perform a deterioration diagnosis by using data indicating a deterioration state is calculated. Thus, it is possible to decrease the time required for calculation of the correction factor.
In the present embodiment, by additionally acquiring state information by simulating a deterioration state of a vehicle air conditioner at the time of a shipping test, and correcting the state information acquired at the time of train operation so as to meet a measurement condition at the time of the shipping test, it is possible to perform a deterioration diagnosis based on the state information indicating the deterioration state acquired in the shipping test.
***Other Configuration***
In the present embodiment, the functions of the operation unit 102, the reception unit 103, the accumulation unit 104, the calculation unit 105, the storage unit 106 and the diagnosis unit 107 may be realized by software; however, as a variation, the functions of the operation unit 102, the reception unit 103, the accumulation unit 104, the calculation unit 105, the storage unit 106 and the diagnosis unit 107 may be realized by a combination of software and hardware. That is, a part of the functions of the operation unit 102, the reception unit 103, the accumulation unit 104, the calculation unit 105, the storage unit 106 and the diagnosis unit 107 may be realized by dedicated electronic circuits, and the rest may be realized by software.
The dedicated electronic circuits are, for example, single circuits, combined circuits, processors made into programs, processors made into parallel programs, logic integrated circuits (logic ICs), GAs, FPGAs, or ASICs. “GA” is an abbreviation for “gate array.” “FPGA” is an abbreviation for “field-programmable gate array.” “ASIC” is an abbreviation for “application specific integrated circuit.”
The processor 111, the memory 112 and the dedicated electronic circuits are collectively referred to as “processing circuitry.” That is, regardless of whether the functions of the operation unit 102, the reception unit 103, the accumulation unit 104, the calculation unit 105, the storage unit 106 and the diagnosis unit 107 are realized by software, or realized by a combination of software and hardware, the functions of the operation unit 102, the reception unit 103, the accumulation unit 104, the calculation unit 105, the storage unit 106 and the diagnosis unit 107 are realized by processing circuitry.
“Device” of the deterioration diagnosis device 101 may be replaced with “method,” and “unit” of the operation unit 102, the reception unit 103, the accumulation unit 104, the calculation unit 105, the storage unit 106 and the diagnosis unit 107 may be replaced with “step.” Otherwise, “device” of the deterioration diagnosis device 101 may be replaced with “program,” “program product” or “computer-readable medium recording a program,” and “unit” of the operation unit 102, the reception unit 103, the accumulation unit 104, the calculation unit 105, the storage unit 106 and the diagnosis unit 107 may be replaced with “procedure” or “process.”
101: deterioration diagnosis device; 102: operation unit; 103: reception unit; 104: accumulation unit; 105: calculation unit; 106: storage unit; 107: diagnosis unit; 111: processor; 112: memory; 113: display interface; 114: communication interface; 201: operation data; 202: apparatus ID; 203: time; 204: train operation; 205: atmospheric temperature; 206: door opening/closing state; 207: vehicle occupancy rate; 208: running speed; 209: compressor current; 210: refrigerant pressure; 301: test data; 302: apparatus ID; 303: time; 304: shipping test; 305: normal state; 306: laboratory temperature; 307: compressor current; 308: refrigerant pressure; 401: test data; 402: apparatus ID; 403: time; 404: shipping test; 405: deterioration state; 406: laboratory temperature; 407: compressor current; 408: refrigerant pressure; 409: deterioration degree
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2016/084465 | 11/21/2016 | WO | 00 |
