JPH0744240A - Gas shutoff device with re-registration function in case of false shutoff - Google Patents

Abstract

PURPOSE:To improve reliability by preventing erroneous stop from being generated again by re-registering the learnt result when the erroneous stop occurs after learning is completed. CONSTITUTION:A flow rate signal G from a flow rate measuring means 1 is calculated into a real flow rate P1 by a flow rate arithmetic part 2. During a prescribed learning term, a learning processing part 3 calculates a flow rate pattern Q as the learnt result and holds it. Further, a flow rate decision part 4 receives the flow rate pattern Q from the learning processing part and a flow rate pattern P2 from the flow rate arithmetic part and compares them and in the case of abnormality, a stop/alarm signal R is outputted. A stop alarming means 5 issues an alarm or stops a gas route. While receiving the signal of this flow rate decision part 4, a stop flow rate storage part 6 stores a flow rate pattern F at the time of stop. Corresponding to an input from the outside, a reregister signal T is outputted by an erroneous stop time reregister signal input means 7. An erroneous stop time reregister processing part 8 instructs the holding of the flow rate pattern F in the stop flow rate storage part 6 to the learning processing part 3 and updates the learnt result.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shutoff device for ensuring safety in using a gas after a gas meter.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a gas shutoff device of this type has a flow rate measuring means 21 for outputting a flow rate signal g according to the amount of passing gas, and a flow rate signal g sent from the flow rate measuring means 21. A flow rate calculation unit 22 that receives and calculates the actual flow rate p1
During a predetermined learning period (30 days), a learning processing unit 23 that calculates and holds a flow rate pattern q from the actual flow rate p1 as a learning result, a flow rate pattern q of a learning result sent from the learning processing unit 23, and a flow rate calculation unit 22. When the flow rate pattern p2 sent from the learning processing unit 23 is received and compared, and an abnormal flow rate pattern p2 that is not included in the flow rate pattern q of the learning result sent from the learning processing unit 23 is detected, the abnormality is determined and the interruption / warning is performed. A flow rate determination unit 24 that outputs a signal r, and a shutoff warning unit 2 that receives a shutoff / warning signal r sent from the flowrate determination unit 24 and issues a warning or shuts off a gas passage based on the shutoff / warning signal r.
It consists of 5.

[0003]

However, since such a gas shutoff device uses only a specific period as a learning period, it holds a flow rate pattern within the specific period as a learning result, which may change depending on the season. A change in gas usage due to an increase or decrease in gas usage or a combination of multiple appliances being used at the same time, and a change in gas usage due to the use of a newly added gas appliance. Since the flow rate pattern q was different from the learning result, a false alarm and false cutoff were made.

That is, the conventional gas shutoff device has a problem that an erroneous alarm and an erroneous shutoff are performed that do not correspond to the actual usage pattern of gas.

Therefore, it is an object of the gas shutoff device of the present invention to improve the reliability of the device by eliminating the false shutoff again due to the flow rate pattern that caused the false shutoff.

[0006]

In order to achieve the above object, the means of the present invention is a flow rate measuring means for outputting a flow rate signal corresponding to the amount of passing gas and a flow rate signal for calculating an actual flow rate. The flow rate calculation unit, a learning processing unit that calculates and holds a flow rate pattern as a learning result from the actual flow rate during a predetermined learning period, compares the flow rate pattern of the learning result and the flow rate pattern of the actual flow rate, and A flow rate determination unit that outputs a shutoff / alarm signal when it detects an abnormal flow rate pattern that is not included in the flow rate pattern and determines an abnormality, and shuts off the flow passage determination / warning signal based on the flow rate determination unit's warning signal Shut-off alarm means, shut-off flow rate storage section that stores abnormal flow rate patterns detected by the flow rate determination section, and re-registration during false shut-off that sends a re-registration signal by receiving a re-registration start signal from the outside. A signal input unit and a false re-registration processing unit for receiving a re-registration signal from the false re-registration signal input unit for instructing the learning processing unit to hold an abnormal flow pattern in the cut-off flow storage unit are provided. It is a thing.

[0007]

With the above-mentioned means, the present invention is erroneous due to a change in gas usage due to changes in seasons, a change in gas usage due to a combination of simultaneous use of multiple appliances, or the use of a newly added gas appliance. When the cutoff occurs, the re-learning start signal is input to the re-registration signal input means at the time of erroneous cutoff, thereby updating the learning result of the learning processing unit based on the use flow rate pattern that caused the erroneous cutoff.

Thus, the false alarm and the false shutoff due to the flow rate pattern of the gas causing the false shutoff are eliminated, and the reliability is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the gas shutoff device of the present invention will be described below with reference to the drawings. In FIG. 1, the actual flow rate P1 is obtained by converting the flow rate measuring means 1 that outputs a flow rate signal G according to the amount of passing gas and the flow rate signal G sent from the flow rate measuring means 1.
A flow rate calculation unit 2 for calculating the flow rate calculation unit 2, a learning processing unit 3 that calculates and holds a flow rate pattern Q from the actual flow rate P1 as a learning result for a predetermined learning period.
Flow rates of 6, 8 m ³ / h are registered), the flow rate pattern Q of the learning result sent from the learning processing section 3 and the flow rate pattern P2 sent from the flow rate calculation section 2
The flow rate determination unit 4 and the flow rate determination unit 4 that output the cutoff / warning signal R in the case of an abnormal flow rate pattern P2 that is not included in the flow rate pattern Q of the learning result sent from the learning processing unit 3 Shut-off alarm means 5 for receiving a shut-off / warning signal R sent from
Is equipped with.

Further, the flow rate determination unit 4 (currently 5
The cutoff flow rate storage unit 6 (11 m ³ which holds an abnormal flow rate pattern F detected by 11 m ³ / h of the flow rate generated by the combination of m ³ / h and 6 m ³ / h) is detected.
/ H is held) and a re-registration start signal is received from the outside (NCU communication line or gas cutoff for communication that connects the communication line at the place where the gas cutoff device and the gas supply center are connected) (Use the reed switch and LED parts that make up the device, and input with an LED setting device that communicates using a phototransistor and an electromagnet.)
Re-registration signal input means 7 for transmitting a re-registration signal T at the time of erroneous disconnection
In case of erroneous interruption, the re-registration signal T is received from the re-registration signal input means 7 during erroneous interruption, and the learning processing section 3 is instructed to hold the abnormal flow rate pattern F (11 m ³ / h) of the interruption flow rate storage section 6 Re-registration processing unit 8 (As a result, learning results are 5, 6,
8 and 11 m ³ / h).

FIG. 2 shows a program flow of the above-mentioned means in steps 11 to 17. Now, it is assumed that the flow from the start of processing to the end of processing is periodically processed by an interval calendar or the like. In the flow rate determination unit 4, it is determined in step 11 (the number in the upper left of each block) whether or not there is an abnormal flow rate.
If the flow rate is abnormal, the shutoff alarm means 5 performs a process 12
Then, the alarm or interruption is performed and the process shifts to the process 13. Process 13
Holds the cutoff flow rate in the cutoff flow rate storage unit 6 and executes the processing 14
Move to. In process 14, re-registration signal input means 7 at the time of erroneous disconnection
It is determined whether there is a signal for starting re-registration at the time of false disconnection in step S11. If no signal is received, the process is terminated. If a signal is received, a re-registration signal is transmitted in process 15 and process 16 is performed.
Move to. In the processing 16, the re-registration processing unit 8 at the time of erroneous interruption processes the erroneous interruption flow rate with the re-registration start signal as the starting point of the processing (processing may or may not be multiplied by the safety factor). Then, in step 17, the erroneous cutoff flow rate processed by the learning processing unit 3 is registered in the learning result, and the processing ends.

[0012]

As is apparent from the above description, the gas shutoff device with the re-registration function for erroneous shut-off of the present invention updates / holds the erroneous shut-off flow rate as a new learning result by the re-registration means for erroneous shut-off. As a result, it is possible to adapt to the flow rate pattern of the learning result according to the actual flow rate, eliminate the recurrence of false alarms and false shutoffs that hinder the use of gas, and improve the reliability of the device.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a gas shutoff device with a re-registration function at the time of false shutoff according to an embodiment of the present invention.

FIG. 2 is a program flowchart in the same device.

FIG. 3 is a functional block diagram of a conventional gas shutoff device.

[Explanation of symbols]

 1 flow rate measuring means 2 flow rate calculating section 3 learning processing section 4 flow rate judging section 5 shutoff warning means 6 shutoff flow rate storage section 7 re-registration signal input means 8 during false cutoff re-registration processing section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuhisa Otani 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor Teruhisa Kojima 1-7-16 Weir, Tama-ku, Kawasaki City, Kanagawa Prefecture (72) Inventor Tatsuaki Katsuno, 3-1-20 Akihara, Kashiwa City, Chiba Prefecture (72) Hideji Fujino, Plains, Chuo-ku, Osaka City, Osaka Prefecture 4-1-2 Machi, Osaka Gas Co., Ltd. (72) Inventor Toshiaki Hojo 507-2 Shintakaracho, Tokai City, Aichi Prefecture Toho Gas Co., Ltd.

Claims (1)

[Claims] 1. A flow rate measuring means for outputting a flow rate signal corresponding to an amount of passing gas, a flow rate calculating section for converting the flow rate signal to calculate an actual flow rate, and a flow rate from the actual flow rate for a predetermined learning period. A learning processing unit that calculates and holds a pattern as a learning result is compared with a flow rate pattern of the learning result and a flow rate pattern of the actual flow rate, and a flow rate pattern of an abnormal actual flow rate not included in the flow rate pattern of the learning result. Flow rate determination unit that outputs a shutoff / warning signal when an abnormality is detected by detecting the flow rate, shutoff warning means that alerts or shuts off the gas passage based on the shutoff / warning signal of the flow rate determination unit, and the flow rate determination unit Shut-off flow rate storage unit that saves the abnormal flow rate pattern detected by, and a re-registration signal input means that sends a re-registration signal by receiving a re-registration start signal from the outside Re-registration function at erroneous interruption, which receives the re-registration signal from the registration signal input means and instructs the learning processing section to retain the abnormal flow pattern of the interruption flow rate storage section Gas shutoff device.