JPH07233940A - Controlling equipment of interruption of gas - Google Patents

Abstract

PURPOSE:To obtain controlling equipment of interruption of gas which enables accurate discrimination of an impact signal by a system wherein a time counting means is started simultaneously with detection of a vibration signal, the frequency of the vibration signal is determined, the vibration signal is determined as a signal of vibration other than an earthquake when the frequency is high, and an interruption cancel signal is outputted. CONSTITUTION:A time counting means 11 is started when an earthquake signal, an impact signal or the like is detected from an earthquake-sensitive detecting means 1, and executes a timer count. A counting means 14 counts the number of pulses of a vibration signal outputted from the earthquake-sensitive detecting means 1, while a frequency computing means 15 determines the frequency of the pulse of vibration detected by the earthquake-sensitive detecting means 1, on the basis of a timer value in the time counting means 11 and the number of pulses of vibration obtained by the counting means 14. An impact determining means 16 determines the frequency as that of the impact signal when the frequency reaches or exceeds a certain frequency, and outputs an operation stop signal to an interruption determining means 17 so that an interruption signal may not be outputted to an interrupting means 10.

Description

Detailed Description of the Invention

[0001]

[Industrial field of use] The present invention relates to a gas shutoff control device that discriminates whether an earthquake or an artificial impact occurs in a gas usage state, and determines an abnormal state and shuts down only when an earthquake is detected.

[0002]

2. Description of the Related Art Conventionally, a gas shutoff control device of this type has the structure shown in FIG. 5 as disclosed in, for example, Japanese Patent Laid-Open No. 3-291535.

That is, in the conventional gas shutoff control device of FIG. 5, reference numeral 21 denotes a seismic sensor. In the seismoscope 21, reference numeral 2 denotes a sensor unit, which is composed of a combination of a simo system and a transducer, and outputs an electric signal when the seismoscope 21 is vibrated. A preamplifier 3 amplifies the electric signal of the sensor unit 2. A signal processing determination unit 4 receives the amplified electrical signal and uses the fuzzy inference unit 5 to make an earthquake determination.

At this time, there are a tuning function unit 6 and a learning function unit 7 so that it is possible to determine an earthquake by fuzzy inference. An output unit 8 outputs the output signal of the determination result from the signal processing determination unit 4 to the buzzer 9 and the shutoff valve 10.

Next, the operation of the above configuration will be described. The signal processing determination unit 4 is provided with an electric signal from the preamplifier 3, that is, a signal wave to be determined, and detects the frequency and duration of the signal wave from this. Then, fuzzy inference is performed from the two conditions of the frequency and the duration, and it is determined whether the vibration is caused by an earthquake or other causes.

The fuzzy inference unit 5 uses four membership functions of the frequency, the amplitude, the duration of the vibration, and the peak number of the amplitude within a predetermined time having an acceleration of a predetermined threshold value or more (see FIG. 6). Shown). Amplify the signal from the sensor unit 2, detect the frequency, amplitude, duration, peak number,
Goodness of fit μ1 (x1) from each membership function,
[mu] 2 (x2), [mu] 3 (x3), [mu] 4 (x4) are obtained, and the weighting factors w1, w2, w3, w4 are further multiplied to obtain the seismicity α1, α2, α3, α4, respectively.

Α1 = w1 * μ1 (x1), α2 = w
2 * μ2 (x2) α3 = w3 * μ3 (x3), α4 = w4 * μ4 (x
4) The seismic intensity α is obtained by performing the union of the four earthquakes thus obtained.

Α = α1Vα2Vα3Vα4 If the seismic intensity α is equal to or larger than a threshold value, it is determined that the earthquake is an earthquake, and if not, it is not an earthquake but a disturbance.

The tuning function unit 6 has a switch for performing the initial setting of the above-described weighting factor and the user's judgment as to whether or not the judgment is correctly made. Based on the signal determined by the user, the learning function unit 7 obtains the earthquake-likeness that has affected the seismic intensity, increases the weighting factor associated with the earthquake-likeness, and conversely, when the determination result is incorrect, the weighting factor is calculated. Learning control to reduce

[0010]

However, the above conventional structure has the following problems. When the vibration sensor 21 detects vibration due to passage of a truck or the like, or when shock vibration of a ball or the like is detected, the output signal of the vibration sensor 21 has a high frequency, a large amplitude, and a long duration, In many cases, the number of vibration peaks is large. Therefore, in the above configuration, the goodness of fit is calculated from the membership function and the seismicity is determined by the union, so even if the likelihood of each earthquake is not so large, the result will be large if the union is performed,
Even if it is a shock vibration, it is misjudged as an earthquake. As a result, the shutoff valve malfunctions while using gas in the shower or cooking,
It causes inconvenience and inconvenience that gas cannot be used.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a gas cutoff control device capable of accurately distinguishing an earthquake signal from an impact signal other than an earthquake signal.

[0012]

In order to achieve the above-mentioned object, the first means of the present invention comprises a shut-off means for shutting off the use of gas, and a seismic detection means for detecting an earthquake or shock signal.
The time measuring means activated by the output signal of the seismic detection means, the ON time measuring means for measuring the ON signal time of the output signal of the seismic detection means, and the OFF signal time of the output signal of the seismic detection means. Off-time measuring means for measuring, counting means for counting the number of output pulses of the on-time measuring means and the off-time measuring means, frequency calculating means for obtaining a frequency from the signals of the clocking means and the counting means, and the frequency An impact determination means for determining whether or not the signal from the calculation means is an impact signal, and an interruption determination means for controlling the interruption means with the signals from the counting means, the time counting means and the output signal from the impact determination means are provided. It is a thing.

Further, in order to achieve the above object, the second means of the present invention is a shut-off means for shutting off the use of gas, a seismic detection means for detecting an earthquake or shock signal, and an output signal of the seismic detection means. More timed means, an on-time measuring means for measuring the on-signal time of the output signal of the seismic detection means, an off-time measuring means for measuring the off-signal time of the output signal of the seismic detection means, Counting means for counting the number of output pulses of the on-time measuring means and the off-time measuring means, a first determining means for determining whether or not the signal is an impact signal by the signals of the time measuring means and the counting means, and the first When it is not possible to judge the impact by the judging means, it is further judged by the second judging means for counting by the long-time measuring means to judge whether it is an impact, and whether it is a seismic signal based on the signals of the counting means and the clocking means. Is provided with a a cutoff judging means for controlling said interrupting means in Rutotomoni output signal from the first and second determination means.

[0014]

According to the first means of the present invention, when the vibration signal (vibration pulse) is detected by the vibration detection means, the time counting means is started and the on time of the vibration signal is
The off time is started to be measured, and counting is started by the signal number (pulse number) counting means. Next, when the vibration signal is input and the frequency of the vibration signal is obtained and the impact judgment means has a high frequency, the vibration signal input to the seismic sensor is judged to be vibration other than an earthquake and the cutoff means does not operate. And outputs a cutoff cancellation signal to the cutoff judging means. Therefore, an earthquake or shock vibration can be accurately discriminated without being accidentally cut off by a signal such as a shock.

Further, according to the above construction, the second means of the present invention starts the time measuring means when the vibration signal (vibration pulse) is detected by the seismic detecting means, and starts measuring the on time and off time of the vibration signal. Moreover, the counting means starts counting the number of signals (pulse number). Next, after the input of the vibration signal is started, the first determination means compares the first measured time with the counted value of the vibration input and counted up to that time.

At this time, if the count value is equal to or greater than the predetermined count value, the vibration signal input to the seismic detector is determined to be vibration other than an earthquake, and a cutoff release signal is output to the cutoff determination means so that the cutoff means does not operate. However, if the count value is less than or equal to the predetermined count value, the second determination means determines the count value within the second clock time, and if the count value is greater than or equal to the predetermined count value, the vibration signal input to the seismic sensor indicates vibration other than an earthquake. Judgment is made and a cutoff cancellation signal is output to the cutoff judging means so that the cutoff means does not operate.

Therefore, an earthquake or shock vibration can be accurately discriminated without being accidentally shut off by a signal such as a shock.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, the same components as those in FIG. 5 are designated by the same reference numerals. In FIG. 1, reference numeral 1 is a seismic detecting means, and 11 is a clocking means, which starts when the seismic detecting means 1 detects an seismic signal or an impact signal and counts by a timer.
An on-time measuring unit 12 measures the on-time of the vibration signal (vibration pulse) output from the seismic-sense detecting unit 1.

Reference numeral 13 denotes an off-time measuring means, which measures the off-time between the on-signal and the on-signal of the vibration signal (vibration pulse) output from the seismic sensing means 1. Reference numeral 14 is a counting means, which counts the number of pulses of the vibration signal output from the vibration detecting means 1. Reference numeral 15 is a frequency calculating means, which is a clocking means 1
From the timer value at 1 and the number of vibration pulses of the counting means 14, the frequency of the vibration pulse detected by the seismic sensing means 1 is obtained.

Reference numeral 16 is an impact determining means, which is a frequency calculating means 1
It is determined whether the vibration frequency obtained in 5 is a predetermined value or more. Reference numeral 17 denotes a cut-off determination means, which is an on-time measuring means 12, an off-time measuring means 13, and a counting means 14, which measures the on / off time of the vibration pulse to measure a predetermined time or more (for example, 40 ms).
If the number of pulses is counted, it is determined to be an earthquake signal, and the shutoff actuation signal to the shutoff means 10 (shutoff valve or the like) is stored.

Next, the operation of the above configuration will be described with reference to the flowchart of FIG. When an earthquake occurs, when an impact force such as a ball is applied or when vibration such as a truck is propagated, or when a person leans against the gas shutoff device (gas meter) and vibration occurs, the vibration detecting unit 1 A pulse signal is output (P1 in FIG. 2). When the pulse signal is output, the clock means 11 (for example, a timer) starts a timer. At the same time, the on-time measuring means 1
2. The off time measuring means 13 is started to measure the time of the pulse signal and the off time (P2 and P3 in FIG. 2).

When an earthquake wave of 80 GAL or more is input, both the on time and the off time are 40 ms or more. The counting means 14 has a first counting means for counting the number of pulses of such a relatively low frequency and a second counting means for counting the number of pulses other than the above-mentioned conditions. The number of pulses counted by the first counting means and the timer value counted by the time counting means 11 are input to the cutoff judging means 17, and if the cutoff judging means 17 has a predetermined number of pulses or more within a predetermined timer time, an earthquake occurs. Is stored as an operation signal for stopping the use of gas in the shutoff means 10, and the signal input from the shock determination means 16 is awaited.

When a shock or other vibration is detected by the seismic detecting means 1, a pulse having a relatively high frequency is output. This is counted by the counting means 14 (especially the second counting means), and the frequency is calculated by the frequency calculating means 15 with the timer value being counted by the timing means 11. The frequency is judged by the shock judging means 16, and when it reaches a certain frequency or more, it is judged as a shock signal and an operation stop signal is outputted to the cutoff judging means 17. Therefore, the interruption determining means 17 erases the stored operation signal of the interruption means 1 by the operation stop signal from the impact determining means 16 so that the interruption signal is not output to the interruption means 10.

Normally, the shock signal has a relatively high frequency and a large amount of energy, so that it gradually attenuates and the counting means 1
In 4 there is a case where it becomes a pulse state that is difficult to distinguish from an earthquake signal. However, since a shock signal is determined when the frequency at the first stage is high and a stop signal is output so that the breaking means 10 does not operate, erroneous breaking does not occur. The above is P5 of FIG.
P6, P7, P8 and P9.

Next, another embodiment of the present invention will be described with reference to FIGS. In FIG. 3, the same components as those in FIGS. 1 and 5 are designated by the same reference numerals.

In FIG. 3, reference numeral 18 is a first judging means, which is predetermined from the number of pulses counted by the seismic sensing means 1 within the first timer time counted by the time counting means 11, that is, the count value of the counting means 14. Determine if it is greater than or equal to the number. As a result, when the number is equal to or more than the predetermined number, a cutoff stop signal is output to the cutoff determination means 27. Reference numeral 19 denotes a second determination means, which is the number of pulses counted by the seismic detection means 1 within the second timer time counted by the timing means 11 when the impact determination is not established by the first determination means 18, that is, Based on the count value of the counting means 14, it is determined whether or not it is a predetermined number or more. As a result, when the number is equal to or more than the predetermined number, a cutoff stop signal is output to the cutoff determination means 27.

Next, the operation of the above configuration will be described with reference to the flowchart of FIG. When an earthquake occurs, when an impact force such as a ball is applied or when vibration such as a truck is propagated, or when a person leans against the gas shutoff device (gas meter) and vibration occurs, the vibration detecting unit 1 A pulse signal is output (P1 in FIG. 4). When the pulse signal is output, the clock means 11 (for example, a timer) starts a timer. At the same time, the on-time measuring means 1
2. The off-time measuring means 13 starts to measure the on-time and off-time of the pulse signal (the above is P2 and P in FIG. 4).
3).

When the seismic wave is input to the counting means 14,
A relatively low frequency pulse is detected and the number of pulses N₁
Counting means for counting the number of pulses and pulses other than those described above
Number N ₂There is a second counting means for counting. First
The number of pulses N counted by the counting means₁And the timing means 11
The counted timer value is input to the cutoff judging means 27.
Then, the cutoff judging means 27 makes a predetermined power
If there are more than the number of lus, it is judged as an earthquake and gas is
The operation signal for stopping the use is stored as
Wait for signal input from the determining means 18 and 19 of No. 2 (P1
4).

When the shock-sensing detecting means 1 detects a shock or other vibration, a pulse N ₂ having a relatively high frequency is output. This is counted by the counting means 14 (particularly the second counting means), and is first inputted to the first judging means 18 with the timer value being counted by the timing means 11. The first determining means 18 counts the counting means 14 (especially the second counting means) within the first timer time.
It is determined whether or not the count value of (counting value when the count is cut off) is greater than or equal to a predetermined value. If it is equal to or larger than the predetermined count value, it is determined as an impact signal and an operation stop signal is output to the interruption determination means 27. That is, the cutoff signal is not output to the cutoff means 10 (P16).

However, when the first judging means 18 cannot judge that it is an impact signal, the second judging means does not exceed the predetermined count value (first timer time) within the second timer time (longer than the first timer time). Is larger than the predetermined count value in the above judgment). If the number of pulses N ₂ is greater than or equal to a predetermined count value, it is determined as an impact signal and an operation stop signal is output to the interruption determination means 27. That is, the cutoff signal is not output to the cutoff means 10 (P20). That is, the shutoff judging means 27 comprehensively judges the three signals from P14, P16, and P20 to control the shutoff valve 10 (P21).

Normally, the shock signal has a relatively high frequency and a large amount of energy, and therefore, when the shock signal gradually attenuates, the counting means 1
In 4 there is a case where it becomes a pulse state that is difficult to distinguish from an earthquake signal. However, since the shock signal is determined when the frequency at the first stage is high and a stop signal is output so that the breaking means 10 does not operate, there is no accidental break. The above is P in FIG.
1 to P21.

[0033]

As is apparent from the above description, according to claim 1 of the gas cutoff control device of the present invention, the seismic sensing means starts the timing means at the same time as detecting the signal, and counts the vibration pulses. If the frequency of the input vibration pulse is calculated and if it is higher than a predetermined frequency, it is judged as vibration due to vibration propagation that is artificially caused by a cause other than an earthquake, and a cutoff operation stop signal is output to the cutoff judgment means. Even if it becomes difficult to distinguish it from the seismic wave even if it is attenuated, the interception judgment means makes a comprehensive judgment of the two signals to accurately discriminate the seismic wave from the shock wave, and prevents accidental interception, so it is safe and easy to use. It has the effect of improving.

According to a second aspect of the present invention, the vibration detecting means detects the signal, and at the same time, starts the timing means and counts the vibration pulses. First, the vibration pulse input by the first judging means is the first vibration pulse. It is determined whether the number of pulses is equal to or more than the predetermined number of pulses within the determination time, and if the number of pulses is less than or equal to the predetermined number of pulses, the second determination means determines whether the number of pulses is equal to or more than the predetermined number of pulses within the second determination time longer than the first determination time. If it is judged to be more than a predetermined number, it is judged to be vibration such as vibration propagation that is artificially caused by a cause other than an earthquake, and a cutoff operation stop signal is output to the cutoff judgment means, after which energy is attenuated and it is difficult to distinguish from seismic waves. Even so, the interruption judgment means comprehensively judges the three signals to accurately distinguish between the seismic wave and the shock wave, and prevents the accidental interruption so that there is an effect that the safety and usability are improved.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing the operation of the device.

FIG. 3 is a control block diagram of a gas shutoff control device according to another embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the device.

FIG. 5 is a control block diagram of a conventional gas shutoff control device.

6A is a diagram showing a relationship between a frequency and a fitness μ1; FIG. 6B is a diagram showing a relationship between an amplitude and a fitness μ2; FIG. 6C is a diagram showing a relationship between a vibration duration and a fitness μ3. Diagram shown (d) Diagram showing the relationship between the peak number of amplitude and goodness of fit μ4

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Earthquake-sensing detection means 10 Interruption means 11 Timing means 12 On-time measurement means 13 Off-time measurement means 14 Counting means 15 Frequency calculation means 16 Impact determination means 17, 27 Interruption determination means 18 First determination means 19 Second determination means

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Junichi Saito 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A shut-off means for shutting off the use of gas, a seismic-sense detecting means for detecting an earthquake or shock signal, a clocking means activated by an output signal of the seismic-sensing detecting means, and a seismic-sensing detecting means. An on-time measuring means for measuring an on-signal time of an output signal, an off-time measuring means for measuring an off-signal time of an output signal of the seismic detection means, an on-time measuring means and an output pulse of the off-time measuring means. Counting means for counting the number; frequency calculating means for obtaining a frequency from the signals of the clocking means and the counting means; shock judging means for judging whether or not the signal from the frequency calculating means is a shock signal; and the counting means. A gas shutoff control device comprising: shutoff determination means for controlling the shutoff means with a signal from the timekeeping means and an output signal from the impact determination means. 2. A shut-off means for shutting off the use of gas, a seismic-sensing detecting means for detecting an earthquake or shock signal, a clocking means activated by an output signal of the seismic-sensing detecting means, and a seismic-sensing detecting means. An on-time measuring means for measuring an on-signal time of an output signal, an off-time measuring means for measuring an off-signal time of an output signal of the seismic detection means, an on-time measuring means and an output pulse of the off-time measuring means. Counting means for counting the number, first judging means for judging whether or not it is a shock signal based on the signals of the time measuring means and the counting means, and further long time measurement when the first judging means cannot judge a shock Means for counting whether or not it is a shock, and determining whether or not it is a seismic signal based on the signals of the counting means and the timekeeping means, and outputs from the first and second determining means. Gas cut-off control device further configured as blocking determination means for controlling said interrupting means in No..