Patent Application
20120078828
The present invention is directed toward enhancing information gathering capability by means of which a gas administrator manages information about gas appliances owned by a gas user who is a client, to thus encourage replacement of a gas appliance, perform maintenance, and the like.
A gas blocking device of this type has hitherto been mentioned in related art documents as a configuration, like that described in connection with Patent Document 1.
Patent Document 1: JP-A-2008-309498
Although Patent Document 1 provides a description about an appliance identification method, there are not any descriptions about an identification method used when a plurality of gas appliances are concurrently used and a method for coping with a case where a new gas appliance is added.
In the related art configuration, appliance unique code sequences of respective gas appliances must be preliminarily stored in an appliance unique code sequence information holding portion 118 in order to identify an appliance. The following problem is encountered when a gas appliance having an unregistered appliance unique code sequence is added. Moreover, even when a gas appliance that uses a flow range in the vicinity of a border value in the flow rate classification table 100a assigned codes has a registered appliance unique code sequence, the appliance unique code sequence will change for reasons of seasonal fluctuations in usage of flow, age deterioration, or the like, there arises a problem of the inability to identify a gas appliance with accuracy.
The present invention solves the problem and aims at preventing a code pattern, which would change for reasons of seasonal fluctuations usage of flow, age deterioration, or the like, from being erroneously judged as a new appliance; detecting a newly added gas appliance or a gas appliance that has not been used; and reporting the thus-detected gas appliance.
In order to solve the foregoing problem, a gas blocking device includes a flow rate measurement portion that measures a flow rate of gas passing through a gas passage; a code extraction portion that extracts a code corresponding to a difference between a flow rate newly measured by the flow rate measurement portion and a previously-measured flow rate and that outputs as a first code pattern a plurality of codes extracted during a predetermined period of time; an initial code learning portion that takes, as a target, a code pattern having emerged a predetermined number of times or more of the plurality of first code patterns output within a predetermined period of time and that takes similar code patterns as a gas appliance code pattern representing a specific gas appliance; and a code maintaining portion that maintains the gas appliance code patterns. Similar code patterns are collectively held as a gas appliance code pattern. Every time the code pattern is extracted, a match between the code pattern and the gas appliance code pattern is judged within a predetermined range. The code pattern changed for reasons of seasonal fluctuations in usage of flow, age deterioration, or the like, can be prevented from being erroneously judged as a new appliance.
The gas blocking device of the present invention can eliminate influence on a code pattern, which would otherwise be caused by seasonal fluctuations in usage of flow, age deterioration, or the like, by judging a match within a predetermined range. Further, since similar code patterns can be gathered, the capacity of the RAM of the microcomputer that controls the gas blocking device can be lessened.
A first invention is directed toward a gas blocking device comprising a flow rate measurement portion that measures a flow rate of gas passing through a gas passage; a code extraction portion that extracts a code corresponding to a difference between a flow rate newly measured by the flow rate measurement portion and a previously-measured flow rate and that outputs as a first code pattern a plurality of codes extracted during a predetermined period of time; an initial code learning portion that takes, as a target, a code pattern having emerged a predetermined number of times or more of the plurality of first code patterns output within a predetermined period of time and that takes similar code patterns as a gas appliance code pattern representing a specific gas appliance; and a code maintaining portion that maintains the gas appliance code patterns. Similar code patterns are collectively held as a gas appliance code pattern. Every time a code pattern is extracted, an identification is performed within a predetermined range as to whether or not a match exists between the code pattern and the gas appliance code pattern. Thus, a code pattern changed for reasons of occurrence of seasonal fluctuations, age deterioration, is prevented from being erroneously judged as a new appliance.
A second invention is based particularly on the first invention, wherein the gas blocking device further includes a code judging portion that compares the first code pattern output from the code extraction portion with all of the gas appliance code patterns held by the code maintaining portion and that outputs the first code pattern as a second code pattern when the first code pattern does not match or is not similar to any of the gas appliance code patterns; and an additional code learning portion that takes, as a target, a code pattern having been output a predetermined number of times or more of the plurality of second code patterns output during a predetermined period of time and that takes similar code patterns as a new gas appliance code pattern representing a specific gas appliance, wherein the code maintaining portion additionally maintains the new gas appliance code pattern. Thus, a newly added gas appliance can be detected.
A third invention is based particularly on the second invention, wherein the gas blocking device further includes an external communication portion, wherein, when the additional code learning portion outputs the new gas appliance code pattern, a report is sent, by way of the external communication portion, to a center that monitors the gas blocking device. Thus, when addition of a new gas appliance is detected, the external communication portion sends a report to the center that monitors the gas blocking device, thereby being able to assist updating of user's gas appliance information.
A fourth invention is based particularly on the second invention, wherein the code judging portion compares the first code pattern output from the code extraction portion with all of the gas appliance code patterns held by the code maintaining portion and, when the first code pattern matches or is similar to any of the gas appliance code patterns, outputs the first code pattern as a gas appliance code pattern; and the code maintaining portion has a timer for each of the held gas appliance code patterns and clears and lets a corresponding timer start counting when received the gas appliance code pattern from any of the code judging portion, the initial code learning portion, and the additional code learning portion, thereby deleting the corresponding gas appliance code patterns when a count of the timer has reached a predetermined value. Reemergence of the gas appliance code pattern is monitored. If the gas appliance code pattern does not appear even after elapse of a predetermined period of time, the gas appliance that has come out of use can be detected.
A fifth invention is based particularly on the fourth invention, wherein the gas blocking device further includes an external communication portion, wherein a report is sent to a center that monitors the gas blocking device by way of the external communication portion when the code maintaining portion deletes the gas appliance code pattern. As a result of a report being sent to the center that monitors the gas blocking device, a reduction in the number of user's gas appliances can be reported.
Embodiments of the present invention are hereunder described by reference to the drawings. However, the present invention shall not be confined to the embodiments.
In
Upon receipt of the flow rate signal A from the flow rate detection portion 201, the flow rate calculation portion 202 calculates a flow rate B. The flow rate B can also be calculated by multiplying the flow rate signal A by; for instance, a coefficient that has been determined by weighting the previously-held flow rate signal A.
A code extraction portion 206 acquires the flow rate B from the flow rate calculation portion 202 and calculates a difference between the flow rate B acquired last time and the currently-received flow rate B and extracts a code for a time of acquisition of the current flow rate B from a code tabulation based on flow rate difference values shown in
Next, during a predetermined period of time, the thus-extracted code is output as a code pattern. If an appliance exhibits its characteristic at startup, the word “predetermined period of time” will be set to 10 seconds that will elapse from when there is not the flow rate B until when the flow rate B emerges. Alternatively, the predetermined time can also be set to a period of time that elapses before four codes are detected since emergence of the flow rate B that is taken as a starting point. So long as a characteristic is yielded during control of an appliance rather than start-up of an appliance, the code pattern may also be output at a point in time when a change arises in flow rate B after emergence of the flow rate B.
For instance, a startup pattern of a gas appliance A shown in
After codes have been sequentially extracted up to a point in time (8), the code extracted at first startup shifts in sequence of [7→1→5→1→1 →1→1]. Extraction of the code is performed “n” times in this sequence.
A code extraction table shown in
The code extraction portion 206 finally outputs top four codes [7151] of the extracted codes [7→1→5→1→1→1→1] as a code pattern E.
When received the code pattern E from the code extraction portion 206, an initial code learning portion 207 holds the thus-received code pattern and counts the number of times the same code pattern E appears.
In the meantime, a startup pattern of a gas appliance B shown in
Consequently, when the gas appliance A301 and the gas appliance B302 start to be used one after another, the initial code learning portion 207 maintains a code pattern E in sequence of gas appliances used by the gas user, as represented by a code pattern tabulation shown in
Next, for a code pattern E emerged a predetermined number of times or more (for instance, five times or more) in a predetermined period of time (e.g., one month), the initial code learning portion 207 extracts the code patterns from a code pattern summary shown in
Further, as a preliminary preparation to summarize similar code patters E, the initial code learning portion 207 determines, for each of codes of the code pattern E, a difference number between the first code pattern E “7151” that is the first code pattern in the tabulation shown in
Likewise, the first code pattern E “7151” and the third code pattern “7462” are decomposed on a per-code basis, we have |7−7|=0, |1−4|=3, |5−6|=1, and |1−2|=1; therefore, an accumulated total difference number comes to five.
Next, in order to collect similar code patterns E, the initial code learning portion 207 gathers code patterns that each have predetermined difference numbers or less (e.g., difference numbers of three or less). In
Finally, the initial code learning portion 207 determines an average of the similar code patterns E on a per-code basis and calculates a final value by rounding off the average to the nearest whole number (or round-up or round-down operation. The thus-calculated final value is taken as a gas appliance code pattern F. During calculation of the gas appliance code pattern of the first appliance shown in
The gas appliance code pattern F may also be determined by addition of a weighted number of times a code pattern emerged rather than by simple use of an average determined on a per-code basis. For instance, in relation to the second code in
As to which the code pattern E “7251” or “7151” is suitable as a gas code pattern F of a first appliance, it is also possible to adopt either the code pattern E “7251,” which has been determined during calculation of a gas appliance code pattern of a first appliance, or the code pattern E “7151,” whichever has a smaller difference number.
In the present embodiment, when the gas appliance code pattern F is taken as “7251,” an accumulated difference number of the first code pattern E “7151” comes to one. An accumulated difference number of the second code pattern E “7251” comes to zero, and its total difference number comes to one. In the meantime, when the gas appliance code pattern F is set to 7151, an accumulated difference number of the first code pattern E “7151” comes to zero, and an accumulated difference number of the code pattern E “7251” comes to one. A total difference number comes to one. Therefore, either the code pattern “7251” or “7151” may be adopted as the gas appliance code pattern F of the first appliance.
The difference number acquired during identification of a second appliance shown in
Moreover, calculation of a gas appliance code pattern of a second gas appliance shown in
Therefore, the gas appliance code pattern F “7251” (or “7151”) of the first appliance is extracted and output from the code pattern E shown in
Since the present embodiment provides descriptions by reference to the gas appliance A301 and the gas appliance B302, code patterns, each of which has an accumulated difference number of four or more, are eliminated from
Upon receipt of the gas appliance code pattern F from the initial code learning portion 207 and an additional code learning portion 210, a code maintaining portion 208 maintains the thus-received gas appliance code pattern F.
Upon receipt of the code learning end signal G from the initial code learning portion 207, a code judging portion 209 starts comparing the code pattern E of the code extraction portion 206 with all of the gas appliance code patterns F held in the code maintaining portion 208. When not all gas appliance code patterns F do not coincide with the code pattern E within a predetermined range, the code judging portion 209 outputs a code pattern E′. For instance, a difference number between the gas appliance code pattern F and the code pattern E is calculated for each of codes of the gas appliance code F and for each of the gas appliance code patterns F. When a resultantly-accumulated difference number comes to four or more, then code pattern E is determined as having no match.
As mentioned above, the code maintaining portion 208 compares, on a per-code basis, an accumulated difference number between the code pattern E and the gas appliance code pattern F “7251” of the first appliance with an accumulated difference number between the code pattern E and the gas appliance code pattern F “7462” of the second appliance. The gas appliance code pattern F having a smaller accumulated difference number is taken as an identified gas appliance.
A seventh code pattern E (hatched in the tabulation) shown in
An explanation is now given to a case where a match does not exist, within a predetermined range, between the code pattern E and all of the gas appliance code patterns F held in the code maintaining portion 208.
A startup pattern of a gas appliance C shown in
Upon receipt of the code pattern E′ from the code judging portion 209, the additional code learning portion 210 maintains the thus-received code pattern E′ and counts the number of times the same code pattern E′ emerged.
The additional code learning portion 210 is directed to the code pattern E′ emerged a predetermined number of times or more within a predetermined period of time (e.g., a month for each code pattern E). The additional code learning portion 210 gathers similar code patterns E′ and outputs one gas appliance code pattern F or more and an appliance addition signal H.
Further, the additional code learning portion 210 deletes the code patterns E′ not emerged the predetermined number of times within the predetermined period of time. Alternatively, the predetermined period may not be set for each of the code patterns E. Further, foregoing processing can also be implemented with regard to all of the code patterns E held at a point in time when a free-running timer has counted one month.
A method for extracting the gas appliance code pattern F is identical with the procedures employed by the initial code learning portion 207.
In the present embodiment, the code pattern E “8761” is detected a plurality of times as is the startup pattern of the gas appliance C shown in
Upon receipt of the appliance addition signal H of the additional code learning portion 210 (when received a report about a high possibility of a new gas appliance having been added), an external communication portion 211 sends a report to the outside. External reports; for instance, a report sent over a public phone line, the Internet, and a private wired or wireless line, and the like, also yield the same effects.
An abnormal flow rate judging portion 203 compares a flow rate B of the flow rate calculation portion 202 with an anomaly judging flow rate, thereby judging occurrence of an anomaly. When an anomaly is judged, a valve actuation signal C is output. For instance, when the flow rate B exceeds the maximum usage of gas allowed for the gas blocking device 200 or when the flow rate B surpasses a serviceable time set for each arbitrary usage of gas derived from the flow rate B, an anomaly is judged to have occurred. Upon receipt of the valve actuation signal C from the abnormal flow rate judging portion 203, the valve actuation portion 204 outputs a valve close signal D. Upon receipt of the valve close signal D from the valve actuation portion 204, a valve 205 closes the gas passage 300.
As mentioned above, in the embodiment, when the additional code learning portion 210 has detected addition of a new gas appliance, the external communication portion 211 has a function of sending a report to a center that monitors the gas blocking device 200. A gas administrator can thereby know an addition to the user's gas appliances, ascertain the nature of the new gas appliance by phone, or the like, and update registration of gas appliance information. On the basis of the registration information, it becomes possible to enhance safety during use of a gas by informing a time when the gas appliances need maintenance and urging the user to replace an outdated gas appliance by purchase, to thus enhance safety during use of gas.
Upon receipt of the code learning end signal G from the initial code learning portion 207 at this time, a code judging portion 409 starts comparing the code pattern E from the code extraction portion 206 with all of the gas appliance code patterns F held in the code maintaining portion 408. When no match exists between the code pattern E and all of the gas appliance code patterns F within a predetermined range, the code judging portion 409 outputs a code pattern E when the code pattern E. For instance, a difference number between the gas appliance code pattern F and the code pattern E is calculated for each of codes in the gas appliance code pattern F and for each of the gas appliance code patterns F. When an accumulated difference number comes to four or more, the code pattern E is judged not to have a match. In the meantime, when the code pattern E and the gas appliance code pattern F match each other within the predetermined range, the code judging portion 409 outputs the thus-matched gas appliance code pattern F. For instance, a difference value between the code pattern E and the gas appliance code pattern F is calculated on a per-code basis for each of the gas appliance code patterns F. When an accumulated difference number comes to three or less, the code pattern E is judged to have a match.
Upon receipt of the gas appliance code pattern F from the initial code learning portion 207 or the additional code learning portion 210, the code maintaining portion 408 clears and lets an elapse counter start counting (namely, start counting for new registration) while holding the gas appliance code pattern F. Upon receipt of the gas appliance code pattern F from the code judging portion 209, the code maintaining portion 408 clears and lets the elapse counter start counting (i.e., start recounting for reasons of reemergence). When the elapse counter that counts a time elapsed since the gas appliance code pattern F was held (reemerged) has counted up to a predetermined value (e.g., one year), the code maintaining portion 408 deletes the gas appliance code pattern F and outputs an appliance delete signal I.
Upon receipt of an appliance addition signal H of the additional code learning portion 210 (a report showing a high possibility of addition of a new gas appliance) or an appliance delete signal I (a report showing a high possibility of disposal of the gas appliance) from the code maintaining portion 408, an external communication portion 411 sends a report to the outside.
As mentioned above, in the present embodiment, the code maintaining portion 408 monitors reemergence of the gas appliance code pattern F. When the gas appliance code pattern F does not again emerge even after elapse of a predetermined period of time, the code maintaining portion 408 has a function of sending a report to the center that monitors the gas blocking device 400. The gas administrator can thereby know a reduction in the number of user's gas appliances and ascertain which one of the gas appliances was discarded by phone, or the like. Thus, the gas administer becomes possible to inform the user of a modification to a maintenance schedule and an alternative appliance.
The present invention will also be subjected to various alterations or applications by the persons skilled in the art on the basis of the descriptions of the present patent application and the well-known techniques without departing the spirit and scope of the present invention. The alterations or modifications shall also fall within the range where protection of the present invention is sought. Further, the respective constituent elements described in connection with the embodiments can also be arbitrarily combined without departing the scope of the spirit of the present invention.
The present patent application is based on Japanese Patent Application (JP-2009-121650) filed on May 20, 2009, the entire subject matter of which is incorporated herein by reference.
As mentioned above, the gas blocking device of the present invention collectively holds similar code patterns as gas appliance code patterns. Every time the code pattern is extracted, the code pattern and any of the gas appliance code patterns are judged to have a match within a predetermined range. Thus, in relation to influence of a code pattern that has changed for reasons of seasonal fluctuations in usage of flow, an age deterioration, or the like, the gas blocking device can be prevented from erroneously judging as a new appliance a code pattern changed for reasons of seasonal fluctuations in usage of flow, an age deterioration, or the like. Further, a newly added gas appliance (or a discarded gas appliance) can be detected and reported. Alternatively, since similar code patterns can be gathered, RAM capacity of a microcomputer that controls the gas blocking device can also be lessened. Hence, if gas is replaced with electricity, water, or the like, the shutoff device can be applied to applications, like, an electric meter, a water meter, or the like.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2009-121650 | May 2009 | JP | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/JP2010/003376 | 5/19/2010 | WO | 00 | 11/18/2011 |
