This invention relates to an information transmitting system for a construction machine such as a hydraulic excavator, which transmits operation data, which have been obtained as a result of various work by the construction machine, to a base station arranged at a remote place.
As a conventional technique of this type, there is, for example, the technique disclosed in JP-A-11024744. According to this conventional technique, a construction machine is provided with sensors for detecting operation states, an operation data collecting device for collecting operation data detected by the sensor, and a communication device and antenna for transmitting the operation data collected in the operation data collecting device. The communication device includes a communication unit. Also disclosed are a base station for receiving signals, which have been outputted from the communication device, via a communication satellite, for example, and user equipment connected to the base station via a communication line. The base station is arranged at a place remote from the construction machine, and the user equipment is such that can directly receive the operation data of the construction machine via the antenna arranged on the construction machine.
According to this conventional technique, the operation data collected by the operation data collecting device are transmitting in their entirety to the base station or the user equipment. By the base station or the user equipment, the operation data of the construction machine are controlled and can be retrieved by a user as needed.
With the above-described conventional technique, various operation data of the construction machine which is performing work can be obtained by the base station at the remote place or by the user equipment. These operation data can be used, for example, for predicting a maintenance schedule for the construction machine, predicting a replacement schedule to a new construction machine, and providing the customer of the construction machine with information on the construction machine.
When the construction machine is a hydraulic excavator or the like, for example, the operation data include an extremely wide variety of data, that is, data based on operating pilot pressures such as digging time, traveling time and swinging time, data based on a main hydraulic circuit such as pump load, swing load and travel load, data relating to an engine such as operation time, coolant temperature and fuel level, data associated with working oil such as working oil temperature and existence or non-existence of filter clogging, position data indicating an actual position of the construction machine, and data on the use of a special attachment, such as a breaker or crusher, mounted upon performing special work.
The conventional technique is high in communication cost, because it transmits the above-mentioned various data in their entirety, for example, to the base station via a communication satellite or to the user equipment by using a telephone line. When transmission is performed via the communication satellite, for example, the communication cost is the product of the size of data and a unit price per byte. When the telephone line is used, on the other hand, the communication cost is the product of time of transmission, which is determined depending upon the size of data, and a unit price per unit time. Accordingly, the communication cost increases with the size of data to be transmitted.
For the user, on the other hand, such various data as mentioned above are not often required in their entirety. Further, necessary operation data may differ depending upon the user.
The present invention has been completed in view of the above-mentioned current circumstance of the conventional technique, and has as an object thereof the provision of an information transmitting system for a construction machine, said information transmitting system being capable of supplying operation data of the construction machine as much as needed by its user or the like without unnecessary data.
To achieve the above-described object, the present invention is characterized in that in an information transmitting system for a construction machine, said system comprising an information control device, which includes an operation data collecting unit and a transmission unit for transmitting operation data collected in the operation data collecting unit, and to be mounted on the construction machine, a base station arranged at a place remote from the construction machine for being inputted with the operation data, and a transmission means for transmitting the operation data, which are transmitted from the transmission unit of the information control device, to the base station, the information transmitting system is provided with a selected data outputting means for selecting predetermined operation data from the operation data, which have been collected in the operation data collecting unit of the information control device, and transmitting the predetermined operation data; the selected data outputting means comprises an operation data collecting device for outputting a command signal to select the predetermined operation data, an identifier designating unit arranged in the information control device to designate an identifier for the specification of the operation data selected in response to the command signal outputted from the operation data collecting device, and a transmission data preparing unit arranged in the information control device to read operation data, which correspond to an identifier designated by the identifier designating unit, from the operation data collecting unit and to prepare the operation data as transmission data; and the selected data outputting means comprises an identifier memory unit arranged in the information control device to store the identifier designated by the identifier designating unit.
According to the present invention constructed as described above, the selected data outputting means can select only operation data, which are desired by a user, and can transmit them to the base station via the communication means.
In the above-mentioned construction, the selected data outputting means may comprise an operation data collecting device for outputting a command signal to select the predetermined operation data; an identifier designating unit arranged in the information control device to designate an identifier for the specification of the operation data selected in response to the command signal outputted from the operation data collecting device; and a transmission data preparing unit arranged in the information control device to read operation data, which correspond to an identifier designated by the identifier designating unit, from the operation data collecting unit and to prepare the operation data as transmission data.
In this construction, the selected data outputting means may comprise an identifier memory unit arranged in the information control device to store the identifier designated by the identifier designating unit.
Further, the operation data selecting device may be arranged at the base station; and the information control device to be mounted on the construction machine may have a receiving part for receiving a command signal, which is outputted from the operation data collecting device of the base station, via a predetermined transmitting means.
As an alternative, the operation data selecting device may comprise a portable, external operating device connectable to the information control device to be mounted on the construction machine.
Further, each of the above-mentioned constructions may further comprise an operating device to be arranged on a side of a user, said operating device being connectable to the base station via a communication means such that the data transmitted to the base station can be read.
The embodiment of the information transmitting system according to the present invention for the construction machine will hereinafter be described based on the drawings.
A construction machine 1 shown in
As depicted in
This information control device 4 further includes a transmitting unit for transmitting operation data collected in the operation data collecting unit 4a, a receiving part for receiving a command signal transmitted from the outside of the construction machine 1, an input/output unit making up a connection unit with an external device, and a timer for clocking every day, i.e., 24 hours in minutes, for example; and is provided with a communication control unit 4b having functions to perform logical decisions and operations, an identifier designating unit 4c for designating the above-mentioned identifiers corresponding to various operation data, an identifier memory unit 4d for storing the identifiers designated by the identifier designating unit 4c, and a transmission data preparing unit 4e for reading operation data, which correspond to the identifiers stored in the identifier memory unit 4d, from the operation data collecting unit 4a when the timer contained in the communication control unit 4b has hit a predetermined time, for example, 0:00 a.m., preparing them into transmission data and supplying the transmission data to the communication control unit 4b.
The transmission data, which have been prepared at the transmission data preparing unit 43 and inputted in the communication control unit 4b, are transmitted from an antenna 5 arranged on the construction machine 1, for example, to a communication satellite 6 as illustrated in
As illustrated in
The above-mentioned communication data, which have been delivered to the above-mentioned communication satellite 6, are transmitted to an earth station 7 and are further transmitted to a base station 9, for example, via a public line. On the other hand, the operation data down-loaded in the portable personal computer 8 can be transmitted to the base station 9, for example, via a public line.
The base station 9 is arranged, for example, inside the head office of the maker of the construction machine 1, said head office being located at a place remote from the construction machine 1, and is provided with an input and output units 9a, 9b, a central processing unit, i.e., CPU 9c for performing various logical decisions and processings, a data base 9d for storing the above-mentioned transmission data inputted from the input/output unit 9a, that is, the operation data of the construction machine 1, and an operation data selecting device 9e for outputting command signals to select predetermined operation data.
In the above-mentioned data base 9d, the communication data inputted from the input/output unit 9a, that is, the operation data of the construction machine 1 are stored in their entirety and in addition, three data patterns consisting of type A data, type B data and type C data are also stored as exemplary data patterns desired by the user.
The type A data include operation data on driving of the engine, for example, an engine speed frequency histogram over 100 hours, operation data on driving of a pump, for example, a pump load frequency histogram based on pump delivery pressures over 100 hours, daily report data such as operated minutes of the engine, and trouble data of the construction machine 1.
The type B data include data on working oil, for example, a working oil temperature frequency histogram showing the frequency distribution of working oil temperatures over 100 hours, operation data on swinging operation, for example, a swing load frequency histogram over 100 hours, operation data on traveling operation, for example, a travel load frequency histogram over 100 hours, daily report data such as operated minutes of the engine, and trouble data of the construction machine 1.
The type C data include daily report data including data on fuel, for example, fuel levels and data on positions of the construction machine 1, for example, the latitudes and longitudes of positions where the construction machine 1 were located, and trouble data of the construction machine 1.
As illustrated in
As shown in
The portable, external operating device 12, the identifier designating unit 4c, identifier memory unit 4d, transmission data preparing unit 4e and communication control unit 4b included in the information control device 4 arranged on the construction machine 1, and the operation data selecting device 9e, CPU 9c and input/output unit 9a included in the base station 9—all of which have been mentioned in the above—make up the selected data outputting means for selecting and outputting predetermined operation data from the operation data collected in the operation data collecting unit 4a of the information control unit 4 arranged on the construction machine 1.
On the other hand, the antenna 5 arranged on the construction machine 1, the communication satellite 6 and the earth station, all of which have been mentioned in the above, make up the communication means which supplies, to the input/output unit 9a of the base station 9, operation data transmitted from the communication unit contained in the communication control unit 4b of the information control device 4.
Operation of this embodiment constructed as described above will be described based on the flow charts shown in
Based on signals outputted from the sensors 2, various operation data of the construction machine 1 are prepared at the controller 3, and these operation data are collected in their entirety in the operation data collecting unit 4a via the communication control unit 4b of the information control device 4 depicted in
Also assume, for example, that the portable, external operating device 12 shown in
At the communication control unit 4b of the information control device 4, it is determined, as shown in step S1 of
When in a state with such processing having been performed, it becomes 0:00 a.m. and the timer in the communication control unit 4b is turned on, the decision of step S11 in
The above-mentioned transmission data are sent to the communication satellite 6 via a transmitting section of the communication control unit 4b and the antenna 5 shown in
When the personal computer 11 shown in
Concerning the type B data and type C data different from the type A data, similar operations and processings as mentioned above are performed. When the key 16 or 17 of the personal computer 11 is operated to perform printing operation with the type B data or type C data displayed on the display screen 19, for example, the printer 13 is actuated to print out a sheet of printer paper with the type B data recorded thereon as shown in
In the above description, the personal computer 11 held by the user was operated by way of example. When the personal computer 10 at the branch office or the plant is operated, desired one or more of the type A data, type B data and type C data can also be retrieved in a similar manner.
The above description was made about the processing as a result of each selective operation of the external operating device 12 connectable to the construction machine 1. However, operation of the operation data selecting device 9e also makes it possible to select specific operation data.
When an operating element of the operation data selecting device 9e shown in
Described specifically, the data contained only in the type A data are selected, transmitted to the base station 9 via the antenna 5, communication satellite 6 and earth station 7, and stored in the data base 9d of the base station 9. If the user operates the personal computer 11, for example, at the key 14 depicted in
It is also possible, as needed, to connect the portable personal computer 8 illustrated in
According to this embodiment in which transmission of operation data is performed as mentioned above, the operation data collected in the operation data collecting unit 4a of the information control device 4 of the construction machine 1 are not transmitted in their entirety but are transmitted only as much as needed by the user or the like. This has made it possible to avoid transmission of useless data and hence, to reduce the transmission-related communication cost. Accordingly, the above-described embodiment can meet desires of the user or the like and moreover, is excellent in economy.
According to the invention as described in any one of the claims, operation data of the construction machine can be supplied only as much as needed by its user or the like without unnecessary data, in other words, the size of data to be transmitted can be reduced, so that the communication cost can be lowered than the conventional communication cost and excellent economy can be assured.
Number | Date | Country | Kind |
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2000-220861 | Jul 2000 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/JP01/06130 | 7/16/2001 | WO | 00 | 6/13/2003 |
Publishing Document | Publishing Date | Country | Kind |
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WO02/08527 | 1/31/2002 | WO | A |
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20040034511 A1 | Feb 2004 | US |