JP2002365117A - Gas-blast circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To find abnormality when an operation according to a function is not attained by an external noise and a trouble of an internal data storage part (RAM or the like). SOLUTION: An internal data error correction-detecting part 109 is provided to encode data using an error correcting code when the data stored in the internal data storage part 106 are written, to detect an error from the coded data using the error correcting code when read out, to correct the error when the correction is possible, to read out the data stored in the internal data storage part 106 periodically by the same manner to conduct error detection and error correction using the error correcting code, and to notify an error detection portion and an error correction content from an external communication means 105 to an outside when the error detection and the correction are carried out. Coping-with such as replacement of a gas-blast circuit breaker is quickly carried out thereby in response to the informed error detection and the correction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shut-off device having a function of preventing a gas accident from occurring and integrating gas consumption.

[0002]

2. Description of the Related Art A conventional gas shut-off device of this type will be described with reference to FIG. 1001 is a gas meter, 10
02 is a flow rate measuring means for outputting a flow rate signal (referred to as S) corresponding to the passing gas flow rate of the gas meter 1001;
Reference numeral 3 denotes a shutoff valve for opening and closing the gas passage, 1004 a valve driving unit for driving the opening and closing of the shutoff valve 1003, 1005 an external communication means for transmitting and receiving data to and from the outside, and 1006 a setting via the external communication means 1005. (K) or a judgment value (T) for abnormal flow rate determination
And the communication information (I) transmitted from the external communication means 1005, the identification information (ID) added to identify the ID of the device is stored, and the data (T ) And an internal data storage unit (RAM of the microcomputer) for storing data (referred to as K ′) necessary for an integrating unit described later.

[0003] Further, reference numeral 1007 denotes an internal data storage unit 10 based on the flow rate signal S output from the flow rate measuring means 1002.
The flow rate value (referred to as S ′) is calculated using the data T ′ necessary for the abnormal flow rate determination processing in step 06, and the internal data storage unit 100
6 is compared with the determination value T for determining an abnormal flow rate, and if there is an abnormality in the gas usage, a shutoff signal (V) is output, the valve drive unit 1004 is driven, and the shutoff valve 1003 is operated. The abnormal flow rate determination unit 1008 for shutting off the gas passage is provided as a current integration value as K × S from the flow rate signal S output from the flow rate measurement unit 1002 and the integration correction constant K stored in the internal data storage unit 1006. And the data K ′ required for performing the integration process of the internal data storage unit 1006
The integration unit adds the current integrated value (M ') to the integrated value (M) stored so far.

When transmitting information from the external communication means 1005, a device ID stored in the internal data storage unit 1006 is added, and when this information is received by a center device or the like, information from any gas shutoff device is used. You have determined whether there is. Constant K for integration correction, determination value T for determination of abnormal flow rate, and device ID stored in internal data storage unit 1006
Is usually set only once at the beginning. The gas shut-off device has been operating for 10 years in an energized state.

[0005]

However, in such a gas shut-off device, when the data in the internal data storage unit 1006 has been inverted during operation for ten years due to external noise or the like, or when the internal data storage If the bit is inverted due to a failure of the unit (a failure of the RAM), the abnormal flow rate determination function, the integration function, and the communication function of the gas shutoff device may not operate properly.

For example, regarding the integrating function, the integrating section 1
In 008, the current integrated value is calculated as K × S from the flow rate signal S output from the flow rate measuring unit 1002 and the integration correction constant K stored in the internal data storage unit 1006, and the internal data storage unit 1006 Although the current integrated value M 'is added to the integrated value M so far stored in the data K' necessary for performing the integration processing, the internal data storage unit 100
If the bits of the integration correction constant K stored in 6 and the integration value M so far are inverted, the integration value may greatly differ from the actual usage. This is the flow measurement means 1
There is a possibility that it cannot be distinguished whether the integrated value has changed in the flow rate signal S output from 002 or whether the bit of the data in the internal data storage unit 1006 has been inverted and changed.

As for the abnormal flow rate determining function, the abnormal flow rate determining section 1007 uses the data T ′ () necessary for abnormal flow rate processing in the internal data storage section 1006 based on the flow rate signal S output from the flow rate measuring means 1002. Using the calculation area), the flow rate value S ′ is calculated and compared with the determination value T for determining an abnormal flow rate stored in the internal data storage unit 1006, and if there is an abnormality in the gas usage amount, the cutoff signal V is output. Valve drive unit 100
4 is operated to shut off the gas passage by operating the shutoff valve 1003. However, the bit of the data T ′ required for abnormal flow rate processing in the internal data storage unit 1006 used when calculating the flow rate value S ′ is When the flow is reversed or when the bit of the determination value T for determining the abnormal flow is reversed, the abnormal flow may not be able to be determined normally, and the gas passage may not be able to be shut off.

When information is sent from the external communication means 1005, the device ID stored in the internal data storage unit 1006 is added, and when this information is received by the center device or the like, the information from which gas shutoff device is sent. Although it is determined whether the information is information, if the bit of the device ID is inverted, communication with the center device or the like may not be possible.

The constant K for integration correction, the judgment value T for judging an abnormal flow rate, and the device ID stored in the internal data storage unit 1006 are usually set only once in the initial stage. Although 1006 has a plurality of redundancy, redundancy is provided for other internal data (data K ′ required for performing the integration process, data T ′ required for the abnormal flow rate determination process, etc.). I did not have.
Further, if a plurality of redundancy are simply provided for all the internal data in this way, for example, when performing a majority decision and performing error correction, it is necessary to provide three or more same data for all data. In this case, the storage capacity of the internal data is three times as large as the data required for the original function, and the storage capacity of the internal data of the gas shut-off device cannot be limited.

[0010]

In the present gas shut-off device, when all data stored in the internal data storage unit are written, the data is encoded using an error correction code, and the data stored in the internal data storage unit is encoded. At the time of reading, error detection is performed from the encoded data using an error correction code, and if correction is possible, error correction is performed. Similarly, data stored in the internal data storage unit is read periodically, and error correction is performed. If an error is detected and corrected by using a correction code, and an error is detected and corrected, an internal data error correction detection unit is provided to notify the error detection location and correction contents to the outside from external communication means. It is.

According to the present invention, it is possible to quickly respond, for example, to replace the gas shut-off device, according to the error detection location and the correction content of the notified internal data.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention relates to data stored in an internal data storage unit (data K 'necessary for performing integration processing, constant K for integration correction, abnormal flow rate determination). (Including the data T 'required for processing, the determination value T for determining abnormal flow rate, and the device ID), encode the data using an error correction code, and read the data stored in the internal data storage unit. Error detection is performed using the error correction code from the coded data and error correction is performed if correction is possible. Similarly, data stored in the internal data storage unit is periodically read out, and the error correction code is used. When error detection and correction are performed by performing error detection and correction, an error detection and correction signal is output, and an internal data error correction for notifying the error detection location and correction contents to the outside from the external communication means. An output section is provided to store data in the internal data storage section (data K ′ required for performing the integration processing, constant K for integration correction, data T ′ required for abnormal flow rate determination processing, and data T ′ required for abnormal flow rate determination. Determination value T, device ID
), The internal data error correction detector can notify the center or the like from the external communication means of where the error has occurred and what the correction content is.

On the center side, a response corresponding to each error location can be taken. For example, if the error location is data relating to the integration function (including data K 'necessary for performing the integration processing and a constant K for the integration correction), incorrect cost billing to the customer can be stopped. In addition, if the data is related to the abnormal flow rate determination function (including the data T 'necessary for the abnormal flow rate determination processing and the determination value T for the abnormal flow rate determination), the gas shutoff device can be replaced immediately. If the device ID is a device ID, the center can detect a difference from the original device ID, change the device ID, and perform communication again.

According to a second aspect of the present invention, an error detection / correction signal is received from the internal data error correction detection section according to the first aspect, and the error detection and correction location is determined by the data (multiplication function) of the internal data storage section. (Including data K ′ necessary for performing the integration process and a constant K for integration correction), an integration function stop unit that outputs an integration stop signal to the flow rate integration unit to stop the integration function, If the bit of the constant K for integration correction in the internal data storage unit has been inverted,
The data before the latest bit is inverted can be retained. Further, when the bit of the integrated value M in the data K ′ necessary for performing the integration processing of the internal data storage unit is inverted, there is a possibility that the bit can be corrected.

According to a third aspect of the present invention, an error detection and correction signal is received from the internal data error detecting section according to the first aspect, and the error detection and correction location are related to the abnormal flow rate determination function of the internal data storage section. (Including the necessary data T ′ for the abnormal flow rate determination processing and the determination value T for the abnormal flow rate determination), a forced shutoff signal is output, the valve drive unit is driven to operate the shutoff valve, and the gas passage is opened. A forcible shutoff unit for shutting off, and if an abnormal flow rate occurs, a bit for data relating to the abnormal flow rate determination function (including data T 'necessary for abnormal flow rate determination processing and a determination value T for abnormal flow rate determination) Is reversed, it may not be cut off even though an abnormal flow rate is flowing.

However, a forced shutoff signal is output from the forced shutoff unit to drive the valve drive unit to operate the shutoff valve, thereby reliably shutting off the gas passage and improving the reliability of the gas shutoff device.

According to a fourth aspect of the present invention, upon receiving an error detection / correction signal from the internal data error detection section of the first aspect, the correction location is added to communication information with which external communication means communicates with the outside. A communication information updating unit for creating communication information I using the corrected identification ID when the identification information or the like (identification ID) to be communicated and communicating with the external communication means, and using the corrected identification ID for communication; Accordingly, if the correction content is correct when the bit of the identification ID is inverted, there is no need to change to the device ID on the center side and perform communication again.

[0018]

FIG. 1 to FIG. 9 show an embodiment of the present invention.
This will be described with reference to FIG.

(Embodiment 1) FIG. 1 is a functional block diagram of the first embodiment of the present invention. In FIG. 1, 101 is a gas meter, 102 is a flow rate measuring means for outputting a flow rate signal (S) corresponding to the flow rate of gas passing through the gas meter 101, 103 is a shutoff valve for opening and closing a gas passage, 104
Is a valve drive unit that drives the opening and closing of the shut-off valve 103; 105 is an external communication unit that transmits and receives data to and from the outside; 106 is a constant for integration correction (K) set via the external communication unit 105; Judgment value for abnormal flow rate judgment (T)
And the communication information transmitted from the external communication means 105
Identification information (ID) added to identify D
And an internal data storage unit (RAM of a microcomputer) for storing data (referred to as T ') necessary for an abnormal flow rate determination unit described later and data (referred to as K') required for an integrating unit described later. is there.

Reference numeral 107 denotes a flow rate value (referred to as S ') using data T' required for abnormal flow rate determination processing in the internal data storage unit 106 based on the flow rate signal S output from the flow rate measuring means 102. Is calculated and compared with the determination value T for determining an abnormal flow rate stored in the internal data storage unit 106. If there is an abnormality in the gas usage, a shutoff signal (V) is output to drive the valve driving unit 104. An abnormal flow rate judging section 108 which operates the shutoff valve 103 to shut off the gas passage.
To calculate the current integrated value as K × S from the flow rate signal S output from the controller and the constant K for integration correction stored in the internal data storage unit 106 and perform the integration processing of the internal data storage unit 106 The current integrated value (M ') is replaced by the current integrated value (M) stored in the necessary data K'
Is an integrating unit that adds.

Reference numeral 109 denotes data to be stored in the internal data storage unit 106 (data K ′ necessary for performing integration processing, constant K for integration correction, data T ′ required for abnormal flow rate determination processing, abnormal flow rate When the determination value T for determination (including the device ID) is written, data is encoded using an error correction code (referred to as P), and when the data stored in the internal data storage unit 106 is read out, Error detection is performed using the error correction code P, and if correction is possible, error correction is performed. Similarly, data stored in the internal data storage unit is periodically read out, and error detection is performed using the error correction code P. When error detection and correction are performed, an error detection and correction signal (referred to as E) is output, and the error detection location and correction content are notified from the external communication means to the outside. Parts is a data error correction detecting unit.

FIG. 2 shows an internal data storage unit 106 (RAM).
FIG. The RAM is divided into blocks in advance as data for the integration function, data for the abnormal flow rate determination function, and a device ID for the communication function. An example of a horizontal / vertical parity code as an error correction code will be described. When the data is written, if the data is assumed to be address 0000 (shaded portion in the figure), the internal data error correction detection unit 109 performs an exclusive OR (XOR) operation from the address 0000 to the address 000E of the internal data storage unit 106. And store it as a horizontal / vertical parity code at an address 000F (a double hatched portion in the figure).

At the same time, the address 000 of the internal data storage
XOR from address 0 to address 00E0 and address 0
It is stored as a horizontal / vertical parity code at 0F0 (the double hatched portion in the figure). When reading the data, the internal data error correction detection unit 109 temporarily stores the data in the address 0000.
, An XOR from address 0000 to address 000E of the internal data storage unit 106 is performed and the result (P1
) Is compared with the value of the address 000F to determine whether or not bit inversion is performed. At the same time, the addresses 0000 to 00E0 of the internal data storage
The result (P2) is checked with the value of the address 00F0, and the presence or absence of bit inversion is determined based on whether or not they match.

If P1 does not match the value of the address 000F of the internal data storage unit 106, P2 does not match the value of the address 00F0 of the internal data storage unit, and if each unmatched bit matches at the first bit, Since the first bit of the value of the referenced address 0000 is inverted, correction is possible. Also, the internal data error correction detection unit 109
Periodically performs the same processing as the above-described data reading on all addresses in the internal data storage unit 106 to perform error detection and correction.

When the internal data error correction detection section 109 has performed error detection or error correction, the address (error detection location) where the error detection or error correction has been performed and the data of the address (correction content) are transmitted to the external communication means. From 105, it notifies the center and the like. Since the address area of the data relating to the integrating function, the address area of the data relating to the abnormal flow rate determining function, and the address area of the device ID are determined in advance on the center side, it is possible to take measures corresponding to the respective error locations. For example, the center can stop erroneous billing of customers if the erroneous part is data related to the accumulation function.

In addition, if an abnormal flow rate determination function is used, the gas shutoff device can be replaced immediately. If the device ID is a device ID, the center detects a difference from the original device ID,
And communication can be performed again. In the above example, a horizontal / vertical parity code is used as an error correction code.
Alternatively, a Hamming code or a BCH code can be used.

The above-described control can be easily realized by using the calculation, judgment and storage functions by the program operation of the microcomputer. FIG. 3 shows a program flow.

First, in process 301, the internal data storage unit 10
Then, it is determined whether or not the internal data is to be written to No. 6; If not writing, process 304
Move on to In process 302, a horizontal / vertical parity code for the write data is calculated, and the process proceeds to process 303. In step 303, the write data and the calculated horizontal / vertical parity code are stored in the internal data storage unit 106. In the process 304, it is determined whether to read the internal data or to perform a periodic check. If it is not the reading of the internal data and it is not a periodic check, the process ends. In process 305, the horizontal / vertical parity code of the read data or check data is calculated, and the process proceeds to process 306.

In the process 306, the horizontal / vertical parity code in the internal data storage unit 106 is compared with the currently calculated horizontal / vertical parity code, and if they match, the process ends. If they do not match, the process proceeds to step 307. In the process 307, if the error can be corrected, the error is corrected. In the process 308, the address and the data having the error are notified to the outside via the external communication means 105, and the process is terminated.

(Embodiment 2) FIG. 4 is a functional block diagram of the second embodiment of the present invention. In FIG. 4, reference numeral 401 denotes a gas meter; 402, a flow rate measuring means for outputting a flow rate signal (referred to as S) corresponding to the flow rate of gas passing through the gas meter 401; 403, a shutoff valve for opening and closing a gas passage;
Is a valve driving unit for driving the opening and closing of the shut-off valve 403, 405 is an external communication means for transmitting and receiving data to and from the outside, 406 is a constant (K) for integration correction set via the external communication means 405, Judgment value for abnormal flow rate judgment (T)
And the communication information (I) transmitted from the external communication means 405 stores identification information (ID) added to identify the ID of the device, and also stores data ( T ′) and an internal data storage unit (RAM of a microcomputer) for storing data (K ′) necessary for an integration unit described later.

Reference numeral 407 denotes a flow rate value (referred to as S ') using data T' necessary for the abnormal flow rate determination processing in the internal data storage unit 406 based on the flow rate signal S output from the flow rate measuring means 402. Is calculated, and is compared with the determination value T for determining an abnormal flow rate stored in the internal data storage unit 406. If there is an abnormality in the gas usage, a shutoff signal (V) is output to drive the valve driving unit 404. An abnormal flow rate determination unit 408 that operates the shutoff valve 403 to shut off the gas passage.
To calculate the current integrated value as K × S from the flow rate signal S output from the controller and the constant K for integration correction stored in the internal data storage unit 406 and perform the integration processing of the internal data storage unit 406 The current integrated value (M ') is replaced by the current integrated value (M) stored in the necessary data K'
And an integration unit that stops integration by a stop signal from an integration function stop unit described later.

Reference numeral 409 denotes data to be stored in the internal data storage unit 406 (data K ′ necessary for performing integration processing, constant K for integration correction, data T ′ required for abnormal flow rate determination processing, abnormal flow rate When the determination value T for determination and the device ID are written, the data is encoded using the error correction code, and when the data stored in the internal data storage unit 406 is read, the error correction code (P
), And if the error can be corrected, the error is corrected. Similarly, the data stored in the internal data storage unit is periodically read out, and the error correction code P
In the case where error detection and correction are performed by using, and an error detection and correction is performed, an error detection and correction signal (referred to as E) is output, and the error detection location and the correction content are sent from the external communication means to the outside. It is an internal data error correction detection unit for notifying.

As the error correction code, a horizontal / vertical parity code is used as in the first embodiment. 410 is an error detection and correction signal E from the internal data error correction detection unit 409.
In response to this, the error detection and correction location is changed to the internal data storage unit 4.
If the data is the data relating to the integration function of 06 (including the data K ′ necessary for performing the integration processing and the constant K for the integration correction), the integration stop signal is output to the flow rate integration unit to stop the integration function. It is provided with an integrating function stopping unit for performing the function.

If the bit of the constant K for integration correction in the internal data storage unit 406 is inverted, the bit of the data relating to the integration function is inverted from the address of the error correction. The integration stop signal (W) is output from the unit 410 to the integration function stop unit, and the latest integration value M before the bit is inverted can be held.

The above-mentioned control can be easily realized by using the calculation, judgment and storage functions by the program operation of the microcomputer. FIG. 5 shows a program flow.

First, in step 501, the internal data storage unit 40
Then, it is determined whether or not the internal data is to be written to No. 6; If not writing, process 504
Move on to In process 502, a horizontal / vertical parity code for the write data is calculated, and the process proceeds to process 503. In step 503, the write data and the calculated horizontal / vertical parity code are stored in the internal data storage unit 406.

In the process 504, it is determined whether or not the internal data is to be read or a periodic check is performed. If the internal read or the periodic check is performed, the process proceeds to a process 505. If it is not the reading of the internal data and it is not a periodic check, the process ends. In process 505, the horizontal / vertical parity code of the read data or the check data is calculated, and the process proceeds to process 506. In the process 506, the internal data storage unit 406
Then, the horizontal / vertical parity code is compared with the currently calculated horizontal / vertical parity code, and if they match, the process is terminated. If they do not match, the process proceeds to step 507.

In the process 507, if the error can be corrected, the error is corrected. In the process 508, the location where the error is corrected is the data relating to the integration function (the data K 'necessary for performing the integration process and the constant for the integration correction). It judges whether or not the address is an address of the integrating function, and if it is an address of data relating to the integrating function, outputs an integrating stop signal. Processing 5
09 to the external communication means 4
The process is notified to the outside through the step 05 and the processing is terminated.

(Embodiment 3) FIG. 6 is a functional block diagram of the third embodiment of the present invention. In FIG. 6, reference numeral 601 denotes a gas meter; 602, a flow measuring means for outputting a flow signal (S) corresponding to the flow rate of gas passing through the gas meter 601; 603, a shutoff valve for opening and closing a gas passage;
Is a valve drive unit for driving the opening and closing of the shut-off valve 603; 605, an external communication unit for transmitting and receiving data to and from the outside; 606, a constant for integration correction (K) set via the external communication unit 605; Judgment value for abnormal flow rate judgment (T)
And the communication information (I) transmitted from the external communication means 605 stores identification information (ID) added to identify the ID of the device, and also stores data ( T ′) and an internal data storage unit (RAM of a microcomputer) for storing data (K ′) necessary for an integration unit described later.

Reference numeral 607 denotes a flow rate value (referred to as S ') using data T' necessary for the abnormal flow rate determination processing of the internal data storage section 606 based on the flow rate signal S output from the flow rate measuring means 602. Is calculated and compared with the determination value T for determining an abnormal flow rate stored in the internal data storage unit 606, and if there is an abnormality in the gas usage, a shutoff signal (V) is output to drive the valve driving unit 604. An abnormal flow rate determining unit 608 that operates the shutoff valve 603 to shut off the gas passage.
To calculate the current integrated value as K × S from the flow rate signal S output from the controller and the constant K for integration correction stored in the internal data storage unit 606 to perform the integration processing of the internal data storage unit 606. The current integrated value (M ') is replaced by the current integrated value (M) stored in the necessary data K'
Is an integrating unit that adds.

Reference numeral 609 denotes data stored in the internal data storage unit 606 (data K ′ necessary for performing the integration processing, a constant K for integration correction, data T ′ required for the abnormal flow rate determination processing, and abnormal flow rate When the determination value T for determination (including the device ID) is written, the data is encoded using the error correction code (P), and when the data stored in the internal data storage unit 606 is read, the encoded data is used. Error detection is performed using the error correction code P and error correction is performed if correction is possible. Similarly, data stored in the internal data storage unit is periodically read out, and error detection is performed using the error correction code. When the error is corrected and the error is detected and corrected, an error detection and correction signal (referred to as E) is output, and the error detection position and the correction content are notified from the external communication means to the outside. It is a data error correction detection unit.

As the error correction code, a horizontal / vertical parity code is used as in the first embodiment. Reference numeral 610 denotes an error detection / correction signal E from the internal data error detection unit 609, and the error detection / correction location is the data relating to the abnormal flow rate determination function of the internal data storage unit 606 (data T ′ necessary for abnormal flow rate determination processing and abnormal data). This is a forced shut-off unit that outputs a forced shut-off signal (referred to as V ′), drives the valve drive unit 604, operates the shut-off valve 603, and shuts off the gas passage when the determination value T) is for the flow rate determination.

If the bits of the data relating to the abnormal flow rate determination function (data T ′ necessary for abnormal flow rate determination processing and determination value T for abnormal flow rate determination) are inverted when an abnormal flow rate occurs, an abnormal There is a possibility that the gas passage may not be shut off because the flow determination unit cannot make a correct determination. However, the valve drive unit 604 is driven by the forced shut-off signal V ′ from the forced shut-off unit 610 to operate the shut-off valve 603, thereby ensuring the gas passage. The reliability of the shut-off gas shut-off device can be improved.

The above-mentioned control can be easily realized by using the calculation, judgment and storage functions by the program operation of the microcomputer. FIG. 7 shows a program flow.

First, in step 701, the internal data storage unit 60
Then, it is determined whether or not the internal data is to be written to No. 6; If not writing, process 704
Move on to In a process 702, a horizontal / vertical parity code for the write data is calculated, and the process proceeds to a process 703. In step 703, the write data and the calculated horizontal / vertical parity code are stored in the internal data storage unit 606. In the process 704, it is determined whether to read the internal data or to perform a periodic check.

If it is not the reading of the internal data and it is not a periodic check, the process ends. In process 705, the horizontal / vertical parity code of the read data or check data is calculated, and the process proceeds to process 706. In the process 706, the horizontal / vertical parity code in the internal data storage unit 606 is compared with the currently calculated horizontal / vertical parity code, and if they match, the process ends. If they do not match, the process moves to step 707.

In the process 707, if the error can be corrected, the error is corrected. In the process 708, the location where the error is corrected is the data related to the abnormal flow rate determination function of the internal data storage unit 606 (the data required for the abnormal flow rate determination process). It is determined whether the address is T 'or an address of a determination value T) for determining an abnormal flow rate.
4 to operate the shutoff valve 603 to shut off the gas passage,
If it is not the data relating to the abnormal flow rate determination function, the process proceeds to step 709 without doing anything. In step 709, the erroneous address and data are notified to the outside via the external communication means 605, and the process ends.

(Embodiment 4) FIG. 8 is a functional block diagram according to the fourth aspect of the present invention. In FIG. 8, reference numeral 801 denotes a gas meter; 802, a flow rate measuring means for outputting a flow rate signal (S) corresponding to the flow rate of gas passing through the gas meter 801; 803, a shutoff valve for opening and closing a gas passage;
Is a valve driving unit that drives the opening and closing of the shut-off valve 803, 805 is an external communication unit that transmits and receives data to and from the outside, 806 is a constant (K) for integration correction set via the external communication unit 805, and Judgment value for abnormal flow rate judgment (T)
And the communication information transmitted from the external communication means 805
Identification information (ID) added to identify D
And an internal data storage unit (RAM of a microcomputer) for storing data (referred to as T ') necessary for an abnormal flow rate determination unit described later and data (referred to as K') required for an integrating unit described later. is there.

Reference numeral 807 denotes a flow rate value (referred to as S ') using data T' necessary for the abnormal flow rate determination processing in the internal data storage section 806 based on the flow rate signal S output from the flow rate measuring means 802. Is calculated, and is compared with the determination value T for determining an abnormal flow rate stored in the internal data storage unit 806. If there is an abnormality in the gas usage, a shutoff signal (V) is output to drive the valve driving unit 804. An abnormal flow rate determination unit 808 that operates the shutoff valve 803 to shut off the gas passage.
To calculate the current integrated value as K × S from the flow rate signal S output from the controller and the constant K for integration correction stored in the internal data storage unit 806 to perform the integration processing of the internal data storage unit 806 The current integrated value (M ') is replaced by the current integrated value (M) stored in the necessary data K'
Is an integrating unit that adds.

807 compares the flow rate signal S output from the flow rate measuring means 802 with the determination value T for determining an abnormal flow rate stored in the setting data storage section 806, and determines if the gas usage is abnormal. Driving the valve drive unit 804 to shut off the valve 803
808, an abnormal flow rate judging section for operating a gas passage to shut off a gas passage
Is a flow rate signal S output from the flow rate measuring means 802 and a constant K for integration correction stored in the setting data storage unit 806.
Is an integrating means for calculating an integrated value as K × S.

Reference numeral 809 denotes data stored in the internal data storage unit 806 (data K ′ necessary for performing the integration processing, a constant K for integration correction, data T ′ required for the abnormal flow rate determination processing, abnormal flow rate When writing the determination value T for determination and the device ID), the data is encoded using the error correction code (P), and when the data stored in the internal data storage unit 806 is read out, Error detection is performed using the error correction code P, and if correction is possible, error correction is performed. Similarly, data stored in the internal data storage unit is periodically read out, and error detection is performed using the error correction code P. When error detection and correction are performed, an error detection and correction signal (referred to as E) is output, and the error detection location and correction content are notified from the external communication means to the outside. Parts is a data error correction detecting unit.

As the error correction code, a horizontal / vertical parity code is used as in the first embodiment. Reference numeral 810 denotes an identification I that has been corrected when an error detection and correction signal from the internal data error detection unit 806 is received and the correction location is an identification ID to be added to the communication information I for communication with the outside by the external communication means.
A communication information updating unit that creates communication information I using D and communicates with the external communication unit 805. If the bits of the identification ID are inverted, the external communication means 805 communicates with the communication information I of the identification ID corrected by the communication information updating unit 810. If is correct, there is no need to change to the device ID on the center side and perform communication again.

The above-mentioned control can be easily realized by using the calculation, judgment and storage functions by the program operation of the microcomputer. FIG. 9 shows a program flow.

First, in the process 901, the internal data storage unit 80
Then, it is determined whether or not the internal data is to be written to No. 6; If not writing, process 904
Move on to In process 902, a horizontal / vertical parity code for the write data is calculated, and the process proceeds to process 903. In step 503, the write data and the calculated horizontal / vertical parity code are stored in the internal data storage unit 806. In the process 904, it is determined whether to read the internal data or to perform a periodic check.

If it is not the reading of the internal data and it is not a periodic check, the process is terminated. In process 905, the horizontal / vertical parity code of the read data or check data is calculated, and the process proceeds to process 906. In the process 906, the horizontal / vertical parity code in the internal data storage unit 806 is compared with the currently calculated horizontal / vertical parity code, and if they match, the process ends. If they do not match, the process proceeds to step 907. Process 90
In step 7, if error correction is possible, error correction is performed.
In step 08, it is determined whether or not the corrected portion is the address of the identification ID.
In step 909, the corrected address and data are notified to the outside via the external communication means 805 as communication information I using D, and the processing ends.

[0056]

As is apparent from the above invention, in the gas shut-off device of the present invention, the data stored in the data storage unit is rewritten due to disturbance noise or a failure in the data storage unit, and the gas shut-off device has its original function. It is possible to promptly notify the outside that the function does not operate as intended, and to improve the reliability of the gas shut-off device.

[Brief description of the drawings]

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

FIG. 2 is an address arrangement diagram of an internal data storage unit of the device.

FIG. 3 is a program flowchart of the apparatus.

FIG. 4 is a functional block diagram of a gas cutoff device according to a second embodiment of the present invention.

FIG. 5 is a program flowchart of the apparatus.

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

FIG. 7 is a program flowchart of the apparatus.

FIG. 8 is a functional block diagram of a gas cutoff device according to a fourth embodiment of the present invention.

FIG. 9 is a program flowchart of the apparatus.

FIG. 10 is a functional block diagram of a conventional gas shut-off device.

[Explanation of symbols]

 Reference Signs List 102 Flow rate measuring means 103 Shut-off valve 104 Valve driving unit 105 External communication means 106 Internal data storage unit 107 Abnormal flow rate determination unit 108 Flow rate integration unit 109 Internal data error correction detection unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 12/16 G06F 12/16 320K G08C 19/00 301 G08C 19/00 301B H04Q 9/00 301 H04Q 9 / 00 301B 311 311H (72) Inventor Yasuo Kiba 1006, Oojidoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. (Reference) 2F030 CB05 CC13 CE04 CE05 CE09 CF05 CF10 2F031 AA03 AB01 AC20 AD03 AF04 AF10 2F073 AA07 AB01 CC03 CC12 DD02 DE08 EF01 EF09 FG01 FG02 GG05 GG06 GG08 5B018 GA02 HA14 KA21 QA04 5K048 AA06 BA36 BA53 EB06 EB08 EB10 FA08 GB05 HA01 HA02

Claims (4)

[Claims] 1. A flow rate measuring means for measuring a flow rate corresponding to a passing gas flow rate and outputting a flow rate signal, a shutoff valve for opening and closing a gas passage, a valve drive unit for driving the shutoff valve, and communicating with the outside. The external communication means and the constant for integration correction set from the outside via the external communication means, the determination value at the time of abnormal flow rate, and the identification information added to the communication information for the external communication means to communicate with the outside, and the like. An internal data storage unit that stores data necessary for performing an integration process and data necessary for an abnormal flow rate determination process; and an abnormal flow rate determination process of the internal data storage unit based on a flow rate signal output from the flow rate measurement unit. Comparing the flow rate value calculated using the data area necessary for use with the determination value at the time of abnormal flow rate in the data storage unit, and if there is an abnormality in the gas usage amount, outputs a shutoff signal to operate the shutoff valve. The moth An abnormal flow rate determination unit that shuts off a flow passage, and a flow rate that integrates data necessary for performing integration processing of the internal data storage unit and a constant for integration correction to a flow rate signal output from the flow rate measurement unit. An integrator, when writing data to be stored in the internal data storage, encodes data using an error correction code, and when reading data stored in the internal data storage, converts an error correction code from the encoded data. Perform error correction using error detection and correction if possible, and also periodically read data stored in the internal data storage unit,
When error detection and correction are performed using an error correction code, and error detection and correction are performed, an error detection and correction signal is output to notify the error detection location and the correction content to the outside from the external communication means. A gas cutoff device including an internal data error correction detection unit. 2. An error detection and correction portion receiving an error detection and correction signal from an internal data error correction detection section is a data area required for performing integration processing of an internal data storage section or a constant area for integration correction. 2. The gas shut-off device according to claim 1, further comprising an integration function stopping unit that outputs an integration stop signal to the flow rate integration unit to stop the integration function. 3. An error detection / correction signal received from an internal data error detection section, and an error detection and correction portion is a data area required for an abnormal flow rate determination process of an internal data storage section or an abnormal flow rate determination of the internal data storage section. 2. The gas shut-off device according to claim 1, further comprising: a forced shut-off unit that outputs a forced shut-off signal and activates a shut-off valve to shut off a gas passage when the determination value is a predetermined value. 4. When an error detection and correction signal is received from an internal data error detection unit and the correction location is identification information to be added to communication information for communicating with the outside by the external communication means, the corrected identification information is used. 2. The gas shut-off device according to claim 1, further comprising a communication information updating unit that generates communication information by performing communication with the external communication unit.