JP2000304586A - Seismo-sensitive gas shutoff apparatus and system thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve accuracy in earthquake decision by judging the earthquake, without being influenced by quake information from houses located in places easy to mistake such as houses, etc., adjacent roads and railways. SOLUTION: In judging the earthquake, using an earthquake judging means 8 in each of seismo-sensitive gas shutoff apparatus, whether the earthquake is true or not is judged from quake information obtained by weighting quake information inputted from other seismo-sensitive gas shutoff apparatus through a communication means 7 with place information of these apparatus and from quake information detected by quake detecting means 5. Thus the accuracy of the earthquake decision can be improved to thereby suppress mistake of the gas shutoff.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas supply system for supplying gas to a plurality of homes, and more particularly to a seismic sensor for shutting off gas supply when an earthquake is detected by a seismic sensor and a gas shutoff device. is there.

[0002]

2. Description of the Related Art A known kind of seismic gas shut-off device and seismic gas shut-off system of this kind has been known as disclosed in Japanese Patent Application Laid-Open No. 6-50535. Hereinafter, the method will be described with reference to FIG.
This will be described with reference to FIG. As shown in FIG.
1, 22, control units 23, 24, gas shutoff units 25, 2
6 and a communication line 27. Here, the seismic sensor 21 is a switch that vibrates in response to an earthquake to turn on and off, and measures the on / off electric pulse generation time to determine whether or not an earthquake has occurred. Then, when it is determined that an earthquake has occurred, another gas shutoff unit 2 is connected via the communication line 27.
6 to the control unit 24. Then, in order to prevent erroneous shutoff, when the seismic judgment of both of the seismic sensors 21 and 22 determines that there is an earthquake, the gas is cut off by the gas shutoff units 25 and 26 when there is an earthquake.

Further, as disclosed in Japanese Patent Application Laid-Open No. HEI 10-118206, there is disclosed a technique in which the accuracy of earthquake determination is improved. As shown in FIG. 9, this type of seismic gas shut-off device has a gas meter in each home equipped with a seismic sensing means 28 and a transmitting means 11, and when an earthquake is detected by the seismic sensing means 28, another seismic gas is detected when an earthquake occurs. Output earthquake information to the shutoff device and input earthquake information from other devices.
In this way, when more than the set number of pieces of earthquake information is input, it is determined that there is an earthquake and the gas is shut off, and the gas can be shut off safely even if the own seismic sensing means does not detect the earthquake. there were.

[0004]

However, in the above-mentioned conventional seismic gas shut-off system, only vibration information for earthquake determination is exchanged. For example, in a multi-family house, etc., when one building has seismic gas
The quake caused by the earthquake is almost the same, although there is a slight difference between floors. In contrast, the number of detached houses varies. In particular, homes that are close to roads and railroads and homes that are not, may receive minute vibrations at all times or sudden vibrations other than earthquakes. If the vibration information of each seismic sensing means is treated in the same way in this state, for example, seismic sensing means installed on multiple doors facing the road or railway detect the vibration and judge it as an earthquake, and move away from it. There is a problem that even in a place where the earthquake judgment information is transmitted, the gas is shut off. Further, even when there is almost no difference in the degree of shaking in an apartment house or in an adjacent place, the cost is high because each individual seismic gas shutoff device has a seismic sensor and a communication means.

[0005]

According to the present invention, in order to solve the above-mentioned problems, when an earthquake is judged by an earthquake judging means, vibration information from another seismic gas shut-off device inputted by communication means is used.
The vibration information weighted from the location information of the device and the vibration information detected by the vibration detection means are used to determine whether or not an earthquake has occurred by the earthquake determination means. According to the above invention, the earthquake is determined by focusing on the detection information of the vibration detecting means of a normal house other than a house close to a road or a railroad, so that the vibration from a house in a place where the misjudgment is easily made as described above. Since the earthquake is determined without being affected by the information, the accuracy of the earthquake determination is improved, and erroneous shutoff of gas can be suppressed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seismic sensor according to claim 1 of the present invention comprises a flow path, a flow path opening / closing means for opening / closing the flow path, and a flow rate measuring means for measuring a flow rate of gas flowing through the flow path. , Vibration detection means for detecting vibrations such as earthquakes, communication means for communicating with other seismic gas cutoff devices, and earthquakes for determining whether or not an earthquake includes vibration information from other seismic gas cutoff devices The present invention is a seismic gas cutoff device including a determination unit, a flow rate measurement unit, an earthquake determination unit, and a control unit that processes a signal from the communication unit and controls the flow path opening / closing unit and the communication unit. Then, when an earthquake is determined by the earthquake determination means of each seismic sensing gas cutoff device, the vibration information input from the communication means from other seismic sensing gas cutoff devices is weighted based on the location information with the device. Since it is determined whether or not an earthquake occurs based on the information and the vibration information detected by the vibration detection means, the accuracy of the earthquake determination is improved, and erroneous shutoff of gas can be suppressed.

A seismic isolation system according to a second aspect of the present invention comprises a gas shut-off device and a plurality of seismic devices, wherein the gas shut-off device includes a flow path, flow path opening / closing means for opening / closing the flow path, and the flow path. Flow rate measurement means for measuring the flow rate of gas flowing through the road, communication means for communicating with the seismic device, earthquake determination means for determining whether or not an earthquake has occurred, flow rate measurement means, earthquake determination means, and communication means. A seismic device comprising a control means for processing a signal and controlling a flow path opening / closing means is a vibration detecting means for detecting vibration such as an earthquake, and a communication means for transmitting vibration information from the vibration detecting means to a communication means. It is provided with. Then, the vibration is detected by a necessary and minimum number of seismic means, which is separate from the main body of the seismic gas shut-off device and smaller than the main body of the main body.

According to a third aspect of the present invention, there is provided a base station communication seismic sensing gas shutoff device having a base station communication means for communicating vibration information from each seismic sensing gas shutoff device to a gas supply base station. The seismic sensing gas shut-off system according to claim 1, comprising: Only the base station communication seismic sensing gas shutoff device has a communication means to the base station, and the base station communication seismic sensing gas shutoff device transmits the earthquake determination information from another seismic sensing gas shutoff device to the base station. Thus, the configuration can be made inexpensively, and the communication processing load of the base station can be reduced as compared with the case where each of the seismic gas blocking devices individually transmits to the base station.

According to a fourth aspect of the present invention, there is provided a seismic gas shut-off system comprising a master seismic gas shut-off device and a plurality of slave seismic gas shut-off devices. A flow path opening / closing means for opening / closing a path, a flow rate measuring means for measuring a flow rate of gas flowing through the flow path, a vibration detecting means for detecting vibration such as an earthquake, and communicating with the plurality of slave seismic gas shutoff devices. Communication means for performing, earthquake determination means for determining whether or not there is an earthquake based on vibration information from the slave seismic gas interrupting device, flow rate measurement means, earthquake determination means, and a signal processing means for processing the signals from the communication means, flow path opening and closing means, And a control means for controlling the communication means, the slave seismic sensing gas cutoff device comprises a flow path, a flow path opening / closing means for opening / closing the flow path, a flow rate measuring means for measuring a flow rate of gas flowing through the flow path, an earthquake, etc. Detect vibration A motion sensing means, a communication means for communicating with the master seismic gas shut-off device, a flow rate measuring means, and a control means for processing a signal from the communication means and controlling the flow passage opening / closing means. It is what it was.

[0010] Then, the earthquake judgment means of the master seismic sensing gas cutoff device receives the vibration information from the slave seismic sensing gas shutoff device, judges whether or not an earthquake has occurred, and transmits the earthquake information to the slave seismic sensing gas shutoff device. Since the earthquake determination means is provided only in the master seismic gas cutoff device, it is not necessary for the slave seismic gas cutoff device, and the system can be configured at low cost.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing a seismic gas shutoff system according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram showing the vibration detecting means according to the first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a flow path for a fluid such as gas, and reference numeral 2 denotes a flow path opening / closing means such as a shutoff valve provided upstream of the flow path 1. Reference numeral 3 denotes an ultrasonic flow rate measuring means for measuring the flow rate of the fluid flowing through the flow path 1 using the ultrasonic element. Reference numeral 6 denotes a power supply for supplying power to each unit. 7
Is a communication means for communicating with other seismic gas shutoff devices,
Numeral 8 denotes an earthquake judging means for judging whether or not an earthquake has occurred based on the output of the vibration detecting means 5 and the vibration information received from the other seismic gas blocking device through the communication means 7. Reference numeral 4 denotes a control unit which controls the flow path opening / closing means 2 and the communication means 7 based on signals from the flow rate measuring means 3, the communication means 7 and the earthquake judging means 8, and is actually constituted by a microcomputer or the like. Numeral 5 denotes a vibration detecting means comprising a vibration acceleration sensor 5a and an amplifier 5b for amplifying the output of the vibration acceleration sensor 5a, as shown in FIG.

Next, the operation and operation will be described.

In the seismic gas shutoff system of the present invention, FIG.
As shown in ( ¹ ), when the signal level of the vibration acceleration sensor 5a of the vibration detecting means 5 of the seismic gas shutoff device installed in each home is equal to or higher than a predetermined value (for example, 150 cm / s ² ), the vibration signal is transmitted to the earthquake determining means 8. The vibration information is output to the communication means 7. Then, the communication means 7 wirelessly transmits the vibration information and the location information to another seismic gas blocking device. The place information is information for identifying whether or not a place close to a road or a rail is likely to be erroneously detected, and is set at the time of installation. Then, the communication means 7 receives the vibration information and the location information from another seismic gas shutoff device. The vibration information and the location information received by the communication means 7 and the vibration detection means 5 in the earthquake determination means 8
Based on the detected vibration information, an earthquake is determined as follows.

[0017]

[Table 1]

[0018]

[Table 2]

As shown in FIG. 4, the vibration information detected by the vibration detecting means 5 is information A, and the vibration information and location information received by the communication means 7 are information B, C and D (Tables 1 and 2). .

The information B, C, and D received by the communication means 7 include information on the location where the apparatus is installed following the presence or absence of vibration of the vibration information. For example, the information C in case 1 indicates that there is a vibration (vibration information = present) where the signal level of the vibration acceleration sensor 5a is equal to or greater than a predetermined value, and that the location is susceptible to vibration (location information = B). The information B indicates that there is no vibration equal to or more than a predetermined value, and that the place is a normal place.

When the above-mentioned information is input, the earthquake judging means 8 judges the earthquake by weighting the vibration information with the location information as follows. When the vibration information has a vibration, the value is 1; when the vibration information is absent, the value is 0, and the vibration information from the vibration detecting means 5 and the vibration information whose location information is A are multiplied by a coefficient 1, and the vibration information whose location information is B Is multiplied by a coefficient 0.8 to obtain the sum of the information A, B, C, and D. If the sum is equal to or greater than a set value (for example, 2.0), it is determined that an earthquake has occurred.

By making the above determination, for example, in case 1, the total is 1.6, so it is determined that there is no earthquake, and in case 2, the total is 2.6, so it is determined that there is an earthquake.

When the earthquake judging means 8 judges that an earthquake has occurred, the control means 4 closes the flow path opening / closing means 2 to shut off gas.

In the description of this embodiment, the location information is set at the time of installation. However, the same effect can be obtained even if the location information is automatically set according to the output state of the vibration detecting means after the installation. Needless to say. Also, the coefficient of the location information to be multiplied by the value of the vibration information to determine the earthquake is 1 or 0.8.
However, this coefficient has an even greater effect of being able to finely set according to the installation location.

(Embodiment 2) FIG. 5 is a block diagram of a seismic sensor according to Embodiment 2 of the present invention. Numeral 11 denotes a transmitting means for transmitting vibration information to the seismic gas interrupting device main body 10 when the vibration detecting means 5 detects the vibration. Numeral 9 denotes a vibration detecting means 5 and transmitting means 11 separately from the seismic gas interrupting device main body 10. It is a seismic means.

Next, the operation and operation will be described.

The vibration detecting means 5 outputs vibration information to the transmitting means 11 when detecting vibration of a predetermined value or more of the acceleration sensor 5a as in the first embodiment. The transmission means 11 transmits this vibration information to the communication means 7 of the main body 10 of the vibration-sensitive gas cutoff device. The communication means 7 outputs the vibration information received from the plurality of vibration sensing means 9 to the earthquake determination means 8.

The earthquake judging means 8 judges whether or not there is an earthquake from the input vibration information as follows.

The earthquake judging means 8 judges that an earthquake has occurred when a predetermined number (for example, 2) or more of vibration information is inputted for a predetermined period of time (for example, one second) after the vibration information is first inputted, and the set number is set. If it is less than this, it is determined that it is not an earthquake. In other words, when vibration information is input from two or more seismic means 9 within a certain period of time, it is determined that an earthquake has occurred and a signal is output to the control means 4, which closes the flow path opening / closing means 2 and shuts off gas. However, if there is not more than one, the earthquake determining means 8 does not determine that there is an earthquake.

(Embodiment 3) FIG. 6 is a block diagram of a seismic gas shutoff system according to Embodiment 3 of the present invention.

As shown in the figure, this seismic gas shutoff system comprises one base station communication seismic gas shutoff device 13 and a plurality of seismic gas shutoff devices 10.

Reference numeral 12 denotes base station communication means for communicating vibration information from each of the seismic sensing gas shutoff devices 10 to the gas supply base station. Reference numeral 13 denotes a base station communication seismic sensing gas shutoff device having the base station communication means 12. It is.

Next, the operation and operation will be described.

The components having the same numbers perform the same operations as those in the first embodiment, and the description is omitted.

The base station communication means 12 of the base station seismic gas shutoff device 13 includes the respective vibration information received from the communication means 7 of each seismic gas shutoff device 10 and the vibration detection means of the base station seismic gas shutoff device 13. 5 is transmitted to the gas supply base station. Thereby, the gas base station inputs all vibration information in the seismic gas isolation system. Since the gas base station is generally farther than the seismic gas shutoff device, the base station communication means 12 is used for long-distance communication rather than the communication means 7.

Such a long-distance communication means only needs to be provided in the base station communication seismic sensing gas shutoff device 13 alone. Conversely, the communication means 7 of each seismic sensing gas shutoff device 10 is a small one for short distance use. It can be used and the system can be configured at low cost.

(Embodiment 4) FIG. 7 is a block diagram of a vibration-sensing gas cutoff system apparatus according to Embodiment 4 of the present invention.

Reference numeral 14 denotes a master seismic gas shut-off device which receives vibration information from a plurality of slave seismic gas shut-off devices and sends the result of the earthquake judgment by the earthquake judgment means 8 to each slave seismic gas shut-off device. This is a slave vibration sensing gas cutoff device that sends vibration information of the vibration detection means 5 to the master vibration sensing gas cutoff device.

Next, the operation and operation will be described. The vibration detecting means 5 of the slave seismic sensing gas cutoff device 15 outputs vibration information to the communication means 7 when detecting vibration equal to or more than a predetermined value of the acceleration sensor 5a as in the first embodiment. The communication means 7 wirelessly transmits the vibration information to the communication means 7 of the master seismic gas interrupting device main body 14. The communication means 7 of the master seismic gas interrupting device main body 14 outputs the vibration information received from the plurality of slave seismic gas interrupting devices 14 to the earthquake determining means 8.

The earthquake judging means 8 judges from the input vibration information whether or not there is an earthquake as follows.

The earthquake judging means 8 judges that there is an earthquake when a predetermined number (for example, 2) or more of vibration information is inputted for a predetermined time (for example, 1 second) after the vibration information is first inputted, and the set number is set. If it is less than this, it is determined that it is not an earthquake. In other words, when vibration information is input from two or more seismic means 9 within a certain time, it is determined that an earthquake has occurred, and a signal is output to the control means 4. Cut off. Further, when the earthquake judging means 8 judges that an earthquake has occurred, the fact is output to the communication means 7, and the communication means 7 wirelessly transmits the earthquake to the communication means 7 of each slave seismic sensing gas cutoff device 15. When the communication means 7 of each slave seismic gas shutoff device 15 receives this signal, it sends a signal to the control means 4 of the slave seismic gas shutoff device 15, and the control means 4 closes the flow path opening / closing means 2 to shut off the gas. .

As described above, the earthquake judgment means 8 can be omitted from each of the slave seismic gas shutoff devices 15 and the system can be constructed at low cost.

In the present description, the case where the vibration detecting means 5 is provided in the master seismic sensor gas cutoff device 14 has been described. However, the system can be omitted, and in this case, a more inexpensive system can be constructed.

[0044]

As is apparent from the above description, the following effects can be obtained according to the present invention.

According to the present invention, the influence of the vibration information from a house in a place where misjudgment is likely can be obtained by weighting the vibration information according to the state of the place where the apparatus is installed and discriminating the earthquake. Without this, the accuracy of earthquake determination is improved and erroneous shutoff of gas can be suppressed.

Further, in the seismic sensing gas shut-off system according to the second aspect, the seismic sensing means is provided separately from the seismic sensing gas shut-off device main body and is constituted by a smaller number than the seismic sensing gas shut-off device main body, so that the necessary minimum is achieved. By detecting vibrations with the number of seismic sensors, a seismic gas shutoff system can be configured at low cost.

According to a third aspect of the present invention, there is provided a seismic sensing gas shut-off system which communicates vibration information between preset seismic sensing gas shut-off devices, and a base station communication seismic sensing gas shut-off device. Only the base station has communication means to the base station, and the base station communicates vibration information from each of the seismic gas shut-off devices to the gas supply base station using the seismic gas shut-off device. Inexpensive configuration.

Further, in the seismic gas shutoff system according to claim 4, vibration is detected by the vibration detecting means of each slave seismic gas shutoff device, and the earthquake judgment means of the master seismic gas shutoff device is controlled by the slave seismic gas shutoff device. By receiving vibration information from the device and determining whether or not an earthquake has occurred, the gas is shut off in the event of an earthquake. Since the earthquake judgment means is configured only in the master seismic sensing gas shut-off device, the slave seismic sensing gas shut-off is performed. There is no need for a device, and the system can be configured at low cost.

[Brief description of the drawings]

FIG. 1 is a block diagram of a seismic sensor according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a vibration detecting unit in the apparatus.

FIG. 3 is a block diagram of a seismic gas shutoff system according to the first embodiment of the present invention.

FIG. 4 is a block diagram illustrating an earthquake determining means of the seismic sensor gas cutoff device according to the first embodiment of the present invention.

FIG. 5 is a block diagram of a seismic gas shutoff system according to a second embodiment of the present invention.

FIG. 6 is a block diagram of a seismic gas shutoff system according to a third embodiment of the present invention.

FIG. 7 is a block diagram of a seismic gas shutoff system according to a fourth embodiment of the present invention.

FIG. 8 is a block diagram of a conventional seismic gas cutoff device.

FIG. 9 is a block diagram of the apparatus.

[Explanation of symbols]

 3 Flow rate measuring means 4 Control means 5 Vibration detecting means 7 Communication means 8 Earthquake determining means 9 Seismic sensing means

Claims (4)

[Claims] 1. A flow path, flow path opening / closing means for opening / closing the flow path, flow rate measuring means for measuring a flow rate of gas flowing through the flow path, vibration detecting means for detecting vibrations such as earthquakes, Communication means for communicating with the seismic gas shutoff device of the present invention, earthquake judgment means for judging whether or not there is an earthquake including vibration information from the other seismic gas cutoff device, the flow rate measurement means, and the earthquake judgment means And a control unit for controlling the communication unit by processing the signal from the communication unit. 2. A gas shut-off device and a plurality of seismic devices, wherein the gas shut-off device measures a flow path, flow path opening / closing means for opening and closing the flow path, and a flow rate of gas flowing through the flow path. A flow rate measuring means, a communication means for communicating with the seismic device, an earthquake determining means for determining whether or not there is an earthquake; and a signal processing means for processing signals from the flow rate measuring means, the earthquake determining means, and the communication means, and The seismic device including a control unit that controls a road opening and closing unit includes a vibration detection unit that detects vibration such as an earthquake, and a communication unit that transmits vibration information from the vibration detection unit to the communication unit. Seismic gas shutoff system. 3. The seismic sensor according to claim 1, further comprising a base station communication seismic sensing gas shutoff device having a base station communication means for communicating vibration information from each seismic sensing gas shutoff device to a gas supply base station. Gas shut-off system. 4. A master seismic gas shut-off device comprising a master seismic gas shut-off device and a plurality of slave seismic gas shut-off devices, said master seismic gas shut-off device comprising: a flow passage; flow passage opening / closing means for opening / closing said flow passage; A flow rate measuring means for measuring a flow rate of the gas flowing through the flow path; a vibration detecting means for detecting vibration such as an earthquake; a communication means for communicating with the plurality of slave seismic sensing gas cutoff devices; An earthquake judgment means for judging whether or not there is an earthquake based on vibration information from the shutoff device, and processing signals from the flow rate measurement means, the earthquake judgment means, and the communication means to control the flow passage opening / closing means, and the communication means The slave seismic sensing gas cutoff device includes a flow path, a flow path opening / closing means for opening / closing the flow path, a flow rate measurement means for measuring a flow rate of gas flowing through the flow path, and a vibration such as an earthquake. To detect A detection means, and communication means for communicating with the master seismic gas shutoff device, the flow rate measuring means,
And a control means for processing a signal from the communication means and controlling the flow path opening / closing means.