JP3368690B2 - Gas shut-off device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage drop test of a battery power supply of a gas shutoff device for ensuring safety in using 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 regular timer section 1 and a regular timer for outputting a voltage inspection signal A which is measured by a timer to periodically inspect the voltage. When the voltage inspection signal A is received from the unit 1, the voltage of the battery power source (not shown) is inspected, and the voltage inspection unit 2 that outputs the voltage reduction signal B when the voltage is below a predetermined value, the voltage reduction signal B of the voltage inspection unit 2 Based on the above, a voltage drop notification unit 3 that gives a warning that the voltage of the battery power supply has dropped and normal operation cannot be expected, and a function stop processing unit that stops the gas passage and performs a function stop process when this voltage drop signal B is received. It consists of four.

[0003]

However, in such a gas shutoff device, once it is judged that the voltage has dropped, the safety warning is taken into consideration and the warning is given and the function is stopped. .

In other words, when a voltage drop is erroneously determined as a voltage drop due to noise or the like during the voltage inspection, there is a problem that the voltage cannot be restarted as a normal voltage even though the voltage actually exists.

Therefore, in the gas shut-off device of the present invention, the voltage test of the battery power supply is judged from the test results of a plurality of times, thereby eliminating the influence of noise or the like only once, and making a more accurate voltage test judgment. The purpose is to prevent erroneous determination and improve the reliability of the device.

[0006]

In order to achieve the above-mentioned object, the means of the present invention receives a voltage drop signal.
Divide one interval of the signal output periodically into a plurality of times
To output the split inspection signal, and the power based on the split inspection signal is output.
Divided inspection that determines the voltage drop of the battery power supply during pressure inspection
The voltage drop signal is sent by the instruction section and the instruction from the divided inspection instruction section.
And the function stop processing unit that performs the function stop processing when the signal is output.
It is equipped with.

[0007]

With the above structure, even if it is judged that the voltage of the battery power source has dropped only once, the warning notification and the function stop will not be accepted immediately, but before the next periodical inspection of the voltage drop. The reliability is improved by eliminating the influence of temporary noise or the like by preventing the erroneous determination of the voltage drop by re-inspecting and determining the authenticity of the voltage drop.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the gas shutoff device of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention,
Periodically (every 25 hours), a periodic timer unit 1 that outputs a voltage inspection signal A for inspecting the voltage of a battery power source (not shown), and the voltage inspection is performed when the voltage inspection signal A is received from the periodic timer unit 1, When the voltage drop signal B is received from the voltage checking unit 2 that outputs the voltage drop signal B when the voltage is equal to or lower than a predetermined value, the interval of the voltage checking signal is periodically set to 25 hours multiple times (for example, the next regular Considering that the inspection and the final divided inspection do not overlap, 24 hours obtained by subtracting 1 hour from 25 hours is divided into 2 times and 12 hours later and 24 hours later are performed twice) Divided inspection The divided inspection instructing unit 5 outputs the signal C, determines the voltage drop by the voltage inspection based on the divided inspection signal C, and outputs the voltage drop notification signal D when the voltage drop signal B is acquired both times.
(Alternatively, the result of the all-division inspection is held and judged based on a large proportion of data.) Based on the voltage drop notification signal D from the divided inspection instruction unit 5, the voltage of the battery power supply is lowered and normal operation is expected thereafter. It includes a voltage drop notification unit 3 that gives a warning that something cannot be done, and a function stop processing unit 4 that stops the gas passage and performs a function stop process when the voltage drop signal B is received.

Next, the program flow chart will be described with reference to FIG. In FIG. 2, 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 function stop processing unit 4, the process T1 (the number at the upper left of each block) determines whether or not the function stop is permitted, and if there is permission, the process moves to process T2, and if not, the process moves to process T4. In the process T2, the presence or absence of the input of the function stop signal from the outside that is centrally managed by communicating with each device outside this device is determined. If there is an input, the process proceeds to the process T3, and if there is no input, the process ends. . In the process T3, the function stop process is performed and the process ends.

In the regular timer unit 1, the process T4 counts up the regular timer and shifts to the process T5. Process T
In step 5, it is determined whether or not the dividing flag is set. If it is set, the process proceeds to process T9, and if it is not set, the process proceeds to process T6. In process T6, it is determined whether or not the regular timer has passed a predetermined time (25 hours). If it has passed, the process proceeds to process T7, and if it has not passed, the process ends.

In the voltage inspecting unit 2, the process T7 determines whether or not the voltage of the battery power source has dropped, and if the voltage drops, the process T8.
If the voltage does not drop, the process ends. Process T
8 sets the dividing flag and ends the processing. In the split inspection instruction unit 3, the process T9 counts up the split timer and shifts to the process T10. A process T10 determines whether or not the division timer has passed a predetermined time (12 hours). If it has passed, the process proceeds to a process T11, and if it has not passed, the process ends. In process T11, the division counter is incremented and the process moves to process T12.

In the process T12, it is determined how many times the division counter is, and if it is the final time (second time), the process goes to the process T13, and if it is not the final time, the process goes to the process T14. The process T13 resets the dividing flag and shifts to the process T14. In the voltage inspection unit 2, the process T14 determines whether or not there is a voltage drop, and if the voltage drops, the process moves to the process T15.
If the voltage has not dropped, the process ends. Low voltage notification unit 3
In process T15, a warning is issued and the process proceeds to process T16. In process T16, the function stop permission is given and the process ends.

As described above, while the voltage inspection process is being performed up to now, it is erroneously determined to be a voltage drop due to noise or the like even though the voltage of the battery power source is equal to or higher than a predetermined value. What has been done is divided into the period until the next voltage inspection is performed (within 24 hours, which is not much different from the conventional inspection period), and the voltage inspection is performed the number of times to confirm again whether the voltage actually drops. Therefore, once it is determined that the voltage has dropped, it is possible to prevent the warning notification and the function stop permission from being given all the time thereafter, and it is possible to improve the reliability.

In the meanwhile, in the past, once it was judged that the voltage had dropped, the operating condition under normal conditions could never be restored again, so the gas supplier was equipped with a gas shut-off device that had judged that the voltage had dropped. I had to go to the scene and replace it with a normal one.

[0015]

As is apparent from the above description, according to the present invention, the voltage is above the predetermined value due to noise or the like, which happens to occur during the voltage inspection process of the battery power supply. If you mistakenly judge that it is a voltage drop, once the voltage drops once again by checking the voltage again for the number of times divided the period until the next voltage test is performed If it is determined that it is possible to prevent the function from being stopped and to never return to the normal operating state, it is possible to improve reliability.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a gas shutoff device according to an embodiment of the present invention.

FIG. 2 is a program flowchart of the device.

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

[Explanation of symbols]

1 Periodic timer section 2 Voltage inspection section 3 Voltage drop notification unit 4 Function stop processing section 5 division inspection instruction section

Continuation of the front page (56) Reference JP-A-63-172072 (JP, A) JP-A-5-252286 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F23N 5 / 26 101 F23N 5/24 110

Claims (2)

(57) [Claims] 1. A signal periodically output from a regular timer unit.
The battery voltage is checked based on the
The voltage that outputs the voltage drop signal when the voltage is below the specified value
Outputs periodically when the inspection unit receives a voltage drop signal
The divided inspection signal is divided by dividing one interval of the signal
Output and battery during voltage test based on the split test signal
A split inspection instruction unit that determines the voltage drop of the power supply, and
When the voltage drop signal is output by the instruction from the split inspection instruction section
A gas shutoff device including a function stop processing unit that performs a function stop processing . 2. The gas shutoff device according to claim 1, further comprising a voltage drop notification unit for issuing a warning about a voltage drop of the battery power source when a voltage drop signal is output during a voltage test based on the split test signal.