JP3180888B2 - Remote monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring device at a data collection site such as a governor of a city gas supply system.

[0002]

2. Description of the Related Art The current patrol inspection work in a governor for supplying city gas involves leak inspection every seven days based on security regulations.
It is implemented for the purpose of collecting pressure recording paper and the like, and therefore, a recorder for recording the primary pressure, the secondary pressure, and the governor opening is installed in the governor chamber containing the governor. The recorder records the measurement data on a recording sheet. The recorded data is collected, brought back, and processed collectively by a host computer or the like.

[0003] On the other hand, there is an attempt to remotely monitor governors installed at many places by a common center monitoring device. For example, as an attempt, a data collection device having communication means with the center monitoring device is installed in each governor, and monitoring measurement data of each governor collected by the data collection device is transmitted to the center monitoring device via a communication line. Then, there is a method in which data is collected and recorded, and an abnormality or the like is determined in the center monitoring device.

[0004]

In the former method, the governor cannot be monitored in real time, the processing after data collection is very troublesome, and the above inspection is indispensable.

In the latter method, the amount of data collected by the center monitoring device becomes enormous, and arithmetic processing such as abnormality determination becomes enormous, which is not practical in both hardware and software. Accordingly, an object of the present invention is to solve such a problem and rationally detect an abnormality of a sensor or the like in a measuring device.

[0006]

In order to solve the above-mentioned problems, the present invention provides an on-site processing device installed at a data collection site and a common center monitoring device connected to a number of on-site processing devices via a communication line. The on-site processing device comprises monitoring data collection means, data reading / writing means for portable non-volatile recording medium, data abnormality monitoring means, and communication means via a communication line. with successive data sexual recording medium, and configured so as to record the past performance data, the abnormality monitoring means of the data constitutes a determining function abnormality of the measuring device using historical performance data, the past performance Data is for each measurement item by measuring equipment
The average value and standard value of the eye for the appropriate period up to that time at the same time
We propose a remote monitoring device with deviation .

According to the present invention, in the above configuration,
It is proposed to determine that the measurement device is abnormal when the measured value is not within the standard deviation of the actual data for a certain period of time.

Further, the present invention proposes, in the above-described configuration, that, even if the measured value is within the standard deviation of the actual data, the measurement device is determined to be abnormal when a fixed measured value continues for a predetermined time.

According to the present invention, in the above configuration, the portable non-volatile recording medium has a recording capacity for recording sequential data and past actual data for a predetermined period of time, respectively. It is proposed that data is sequentially erased so that data from a present time to a time before a predetermined period is always retained.

According to the present invention, in the above configuration, the portable non-volatile recording medium is configured so as to be divided into one for recording sequential data and one for recording result data, and at least a portable non-volatile recording medium for recording result data. By sequentially erasing oldest data when recording new data,
It is proposed to always hold data from the present to a predetermined period before.

The present invention proposes that the portable nonvolatile recording medium in the above configuration is an IC memory card.

Further, the present invention proposes to apply a governor as a data collection site in the above configuration.

[0013]

The data from various monitoring devices at the data collection site are intermittently collected by the data collection unit of the on-site processing device, and are sequentially recorded on the portable non-volatile recording medium by the read / write unit. In the portable non-volatile recording medium, together with the above sequential data, data obtained by statistically processing the data up to that time at the same time, for example, for each measurement item by each measuring device for an appropriate period up to that time at the same time Record the average and standard deviation.

The above sequential data is constantly monitored by abnormality monitoring means, and abnormality is determined by abnormality determination means. When it is determined that the abnormality is abnormal, the communication unit calls the center monitoring device and transmits the abnormality determination result to the center monitoring device. At the time of abnormality determination, it is possible to determine an abnormality of a sensor or the like of a measuring device by referring to past performance data.

In this way, the center monitoring device can detect the occurrence of an abnormality at each data collection site without collecting and processing the data of the measuring equipment and the like, thereby reducing the system resources. At the same time, quick response measures are possible without requiring skill.

However, if necessary in the center monitoring device, a request for transmission of data of the portable non-volatile recording medium is issued to the communication means of the local processing device which has reported the abnormality, thereby recording the data on the portable non-volatile recording medium. Data can be obtained, and this data can be efficiently used for analysis and determination of abnormality.

The portable non-volatile recording medium is provided with a recording capacity for recording sequential data and past actual data, respectively, for a predetermined period of time. When recording new data sequentially, the oldest data is sequentially erased so that the oldest data is erased sequentially. , Data for a predetermined period from the present can be held. For example, if the storage capacity is such that data can be stored over a long period of time, such as one year,
The data can be continuously used over a long period of time while keeping the latest one-year data. The portable non-volatile recording medium can be collected from the on-site processing device and processed by a personal computer or the like as necessary.

Further, the portable non-volatile recording medium is configured so as to be divided into one for recording sequential data and one for recording actual data, and at least the portable non-volatile recording medium for recording actual data is
When new data is recorded sequentially, the oldest data is erased sequentially, so that the data from the present time to a predetermined period before is always retained. Even when processing is performed by a personal computer or the like, the actual data can be held in the on-site processing apparatus as it is.

The data recorded on the portable non-volatile recording medium can be read out and processed by a portable terminal device at the data collection site before the predetermined period elapses, if necessary. And can be read out and processed by the center monitoring device.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 schematically shows the overall configuration of the present invention.
Reference numerals 1 (1 a, 1 b,..., 1 n) denote governor chambers installed at appropriate places in the city gas supply system. In these governor chambers 1, together with the governor main body 2, the opening meter of the governor main body 2 and the governor main body 2 Various monitoring devices such as primary and secondary side pressure sensors, flow meters, gas detectors, and other measuring devices, and governor cut-off detection sensors, SI sensor abnormality detection sensors, and other abnormality detection devices (not shown) ) Has been established, and it is a data collection site for governor monitoring. The on-site processing device 3 that collects and processes data from these various devices is installed outside the governor room 1.

Reference numeral 4 denotes a common center monitoring device for monitoring the operation of the governor body 2 at a plurality of locations. The center monitoring device 4 and the on-site processing device 3 at each data collection site are connected via a communication line 5. Connected to form a remote monitoring device. The communication line 5 applies a public line, a dedicated line, and a wireless line alone or in combination. The center monitoring device 4 and each on-site processing device 3 constitute communication means corresponding to these communication lines.

FIG. 2 is a block diagram showing an example of the construction of the on-site processing device 3 constituted by a microcomputer application device or the like. Reference numeral 6a connected to the on-site processing device 3 denotes an opening meter of the governor body 2, a governor. It shows a group of measuring devices such as a pressure sensor, a flow meter, and a gas detector on the primary side and the secondary side of the main body 2, and these are configured to output measurement data in an analog amount. Reference numeral 6b denotes a group of abnormality detection devices such as a governor cutoff detection sensor and an SI sensor abnormality detection sensor.
These are contact outputs. In FIG. 2, the data collection means A, the abnormality monitoring means B,
The block group corresponding to the communication means C is indicated by a two-dot chain line in the figure.

The on-site processing apparatus 3 includes the above-described measuring equipment group 6a
And input means 7a and 7b for connecting the abnormality detection device group 6b to the input device. That is, reference numeral 7a denotes measurement data input means, which comprises an analog pre-processing circuit, an A / D converter, a level converter, and the like, and has a function of converting analog data of each measurement device into a predetermined digital signal. It is configured so that Reference numeral 7b denotes an abnormality detection data input means, which comprises a level conversion circuit and the like.

The data converted into a predetermined digital signal by each of the data input means 7a and 7b is temporarily read into an appropriate recording area by the data reading means 8 for performing the subsequent processing. The data reading means 8 may be constituted by a function of controlling each of the data input means 7a and 7b and intermittently transferring data to a predetermined temporary recording area such as a RAM every time, for example, every 0.5 seconds. it can.

The data of the measuring device group 6a read into the data reading means 8 is either raw data or a portable data such as an IC memory card via the recording medium reading / writing means 12 at predetermined time intervals by performing appropriate arithmetic processing or the like. The data is recorded on the non-volatile recording medium 13 over time, and the actual data for the period up to that time, for example, the statistic of each item at each time, for example, the data such as the average value and the standard deviation are recorded. For example, the recording capacity of a portable non-volatile recording medium is one year of the above-mentioned data, and when the recording period is exceeded, when recording new data sequentially, the oldest data is sequentially erased so that the current data is always stored. From a predetermined period, that is, one year of data. This portable nonvolatile recording medium 13
The data recording interval is determined in consideration of the capacity of the portable nonvolatile recording medium 13 and the continuous data recording period, and in the embodiment, is set to a time longer than the sampling time, for example, every minute. Note that the recording interval may be different for each data item.

Among the data intermittently read by the data reading means 8, the data of the measuring equipment group 6a is compared with set values and actual data by the data processing means 9, and other calculations are performed. Is performed.

That is, the governor body 2 from the measuring instrument group 6a
The data such as the primary side pressure, the secondary side pressure, the opening degree of the governor body 2, the flow rate, and the gas concentration are read by the data reading means 8 every 0.5 second sampling time, for example. The upper and lower limits are monitored by comparing the set upper and lower limits. At the same time, a predetermined calculation such as a calculation of a data difference between adjacent sampling points, a pressure correction of a flow rate, or a time-based weighted averaging process of the data is performed. Done. Note that the sampling time is set short so as to correspond to the maximum data change speed assumed when an abnormality occurs.

As a result of performing the above-described data abnormality determination and the measurement device abnormality determination, if a process abnormality is determined, the data processing means 9 issues an alarm output to the abnormality determination means 10 and at the same time, It is recorded in the progress data storage means 11 as the progress data together with the data before and after that.
The progress data storage unit 11 is constituted by a nonvolatile storage unit such as an SRAM backed up by a battery.

Reference numeral 10 denotes the above-described abnormality determining means.
The abnormality judging means 10 judges an abnormality by monitoring an alarm from the data processing means 9 and an abnormality detection output from the abnormality detecting equipment group 6b obtained through the data reading means 8.
That is, when the data processing unit 9 issues an alarm or when the abnormality detection device group 6b issues an abnormality detection output, the abnormality determination unit 10 performs the abnormality handling process according to a predetermined procedure. The abnormality handling processing includes abnormality determination, abnormality importance classification processing, processing corresponding to abnormality importance, output to the communication management unit 14, and the like.

That is, when the data processing means 9 issues an alarm, the abnormality determining means 10
It is determined whether the abnormality is a process abnormality or a measurement device group 6a abnormality. At this time, the abnormality determination unit 10 accesses the portable non-volatile recording medium 11 via the recording medium read / write unit 12 as necessary depending on the content of the abnormality, and records the abnormal data on the portable non-volatile recording medium 13. The abnormality can be determined by comparing the data with the similar data in the past.
In addition, in addition to the abnormality data itself, the elapsed data temporarily recorded in the elapsed data storage unit 11 can be used for such an abnormality determination operation.

As shown in FIG. 4, the data of the measuring instruments are monitored at the points P ₁ and P ₂ which exceed the upper and lower limits as described above. significantly with and point P _3, which deviates from, even in the standard deviation in the R monitoring points constant measurements given time continued point P _4, Ya sensor instrumentation group 6a in the data of these points It is determined that the amplifier, the A / D converter and the like are abnormal.

In the embodiment of the present invention in which the governor room 1 of the city gas supply system is used as the data collection site, the above-described abnormality determination may not be performed by the on-site processing apparatus alone. That is, as described above, even if the data alone can be determined as abnormalities of the sensors, amplifiers, A / D converters, and the like of the measuring device group 6a, the cause of this data is caused by the abnormalities of these sensors and the like. Instead, it may be caused by some abnormality in the supply system. Therefore, as described above, when data that can be determined to be abnormal such as a sensor is generated, the communication unit C determines whether there is a data abnormality common to the appropriate number of other field processing apparatuses from the field processing apparatus 3. Inquiries,
When it is confirmed that the failure is a single failure of only the on-site processing apparatus 3, it is preferable to determine that the sensor or the like is abnormal.

The abnormality judging means 13 judges the occurrence of the abnormality as described above, and classifies the contents of the abnormality into, for example, four levels of importance such as the most important, important, little urgency, and no urgency. Then, these contents are output to the communication management means 14.

When the importance of the abnormality is high, the communication management means 14 interrupts the other processes currently in operation and performs an abnormality handling process as an interrupt process. In the case of, as the priority process, after the currently operating process ends, the abnormality handling process is performed prior to other processes. In the case of, as an ordinary process, an abnormality handling process is performed after the completion of another process prior to this.
In the case of (1), an insignificant abnormality that clearly indicates a failure of the device is performed. In this case, an abnormality handling process is performed as a process with a low priority.

Reference numeral 15 denotes communication control means managed by the communication management means 14, 15a denotes communication control means for a dedicated / wireless line, 15b denotes communication control means for a public line, and 15c denotes communication control means for serial communication. Communication control means 15
a is connected to the wireless communication device 17 via the dedicated / wireless line communication modem 16a, and the communication device control means 18;
The configuration is such that activation control of the wireless communication device 17 is performed via the control output unit 19. The communication control means 15b is connected to the public line 20 via the public communication modem 16b. The communication control means 15c is connected to the modemless serial interface 16c.
6c is configured to be connectable to portable terminal equipment and other modems.

FIG. 3 is a block diagram showing a basic configuration of the center monitoring device. The center monitoring device 4 includes a communication unit D corresponding to the communication unit C of the on-site processing unit 3, a monitoring unit 21, and a display unit 22. , Alarm means 23, and operation input means 24. As the communication means D, similarly to the on-site processing device 3, a dedicated / wireless line communication control means 26a corresponding to the wireless device 25, a dedicated / wireless line communication modem 27a, and a dedicated / wireless line corresponding to the public line 20. Communication control means 26b and a public communication modem 27b.

In the above configuration, when an abnormality to be reported to the center monitoring device 4 occurs in the equipment in the governor room 1, the communication management means 14 receives the judgment output from the abnormality judgment means 13 and selects the communication control means 15. The center monitoring device 4 is called.

For example, when a public line 18 is used as the communication line 5, the communication management means 14
b is selected, and the center monitoring device 4 is called via the transmission / reception means 16b to establish a line connection. Next, the communication management unit 14 of the on-site processing device 3 and the monitoring unit 21 of the center monitoring device 4 mutually confirm and establish a data link, and first, the on-site processing device 3 sends the abnormality determination unit 10 to the center monitoring device 4. The data of the content of the abnormality determined by is transmitted.

In the center monitoring device 4, the monitoring means 23 displays the data of the contents of the abnormality transmitted from the on-site processing apparatus 3 on the display means 22 and, if necessary, the alarm means 23.
Generates an alarm. As described above, the center monitoring device 4 can detect the occurrence of the abnormality and its content without processing the raw data of the equipment at the data collection site, and can take prompt action.

The center monitoring device 4 can collect raw data of the equipment at each data collection site as needed. That is, when raw data is required in the center monitoring device 4, a data transmission request is sent from the monitoring unit 21 of the center monitoring device 4 to the communication management unit 14 of the on-site processing device 3 by an input from the operation input unit 24 or the like. When sent,
The communication management means 14 transmits the data to the portable nonvolatile recording medium 1 via the recording medium read / write means 12 in accordance with the content of the data transmission request.
3 to read predetermined data and transmit it to the center monitoring device 4 side. In this way, the center monitoring device 4 can collect and analyze raw data of the equipment at each data collection site as needed. In addition, when the temporary storage unit 11 of the progress data is configured as described above, the data of the temporary storage unit 11 can be transmitted to the center monitoring device 4 as necessary. .

When the predetermined processing is completed as described above,
Either the center monitoring device 4 or the on-site processing device 3 terminates the data link, releases the line, and terminates the abnormality handling process.

The portable non-volatile recording medium 13 has, for example, a capacity such that the data can be recorded for one year or more, and when sequentially recording new data exceeding a period corresponding to the storage capacity as described above, By sequentially erasing old data, it is possible to keep the latest one year of data by repeatedly using it at all times. Alternatively, in some cases, the data can be collected from the on-site processing device 3 every year, brought back, and analyzed with a personal computer or the like. In this case, a means for leaving the result data in the on-site processing device 3 is required. Further, the portable terminal device 28 is connected to the modemless serial interface 16c as necessary, and a data transmission request is sent to the communication management means 14 via the communication control means 15c for serial communication. The data recorded on the non-transitory recording medium 13 can be read out to the portable terminal device 28 or the like and processed.

[0043]

As described above, the present invention has the following effects. Eliminating the collection operation every short period as in the on-site recording paper system is unnecessary. The data can be processed directly by computer without performing the necessary input work in the case of the on-site recording paper system. The processing load on the center monitoring device is small, and neither the hardware nor the software is enormous. Since the operation in the center monitoring device is simple, a skilled person is not required. By recording performance data on a portable non-volatile recording medium and using it as data for judging abnormality of measured data, abnormality of a sensor such as a measuring device can be detected.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing an overall configuration of the present invention.

FIG. 2 is a block diagram illustrating an example of a basic configuration of a field processing apparatus according to the present invention.

FIG. 3 is a block diagram showing an example of a basic configuration of a center monitoring device according to the present invention.

FIG. 4 is an explanatory diagram conceptually showing data of a measuring device and an abnormality determination operation.

[Explanation of symbols]

A data collection means B abnormality monitoring means C communication means D communication means 1 governor room 2 governor main body 3 field processing device 4 center monitoring device 5 communication line 6a measurement equipment group 6b abnormality detection equipment group 7a measurement data input means 7b abnormality detection data input Means 8 Data reading means 9 Data processing means 10 Abnormality judging means 11 Progress data recording means 12 Recording medium read / write means 13 Portable non-volatile recording medium 14 Communication management means 15a, 26a Dedicated / wireless communication control means 15b, 26b Public line Communication control means 15c serial communication communication control means 16a, 27a dedicated / wireless line communication modem 16b, 27b public communication modem 16c modemless serial interface 17 wireless communication device 18 communication device control means 19 control output means 20 public line 21 Monitoring means 22 Display means 23 alarm means 24 operational input means 25 wireless device 28 Allowed 搬端 end devices

Continuation of the front page (51) Int.Cl. ⁷ identification code FI G08C 15/00 G08C 15/00 D (58) Field surveyed (Int.Cl. ⁷ , DB name) H04Q 9/00-9/06

Claims (7)

(57) [Claims] An on-site processing device is installed at a data collection site, and a common center monitoring device is connected to a number of on-site processing devices via a communication line.
Monitoring data collection means, data reading / writing means for a portable nonvolatile recording medium, data abnormality monitoring means,
The communication means is configured by a communication line, and the past performance data is recorded together with the sequential data on a portable non-volatile recording medium. configure the function of determining the, before
The past performance data is based on
Average value and standard deviation for the appropriate period up to that time at the same time
Remote monitoring apparatus characterized by the 2. The remote monitoring apparatus according to claim 1 , wherein when the state where the measured value is not within the standard deviation of the actual data continues for a predetermined time, it is determined that the measuring device is abnormal. 3. The remote monitoring device according to claim 1 , wherein even if the measured value is within the standard deviation of the actual data, if the measured value continues for a predetermined time, it is determined that the measuring device is abnormal. 4. The portable non-volatile recording medium has a recording capacity for recording sequential data and past actual data, respectively, for a predetermined period. When recording new data sequentially, the oldest data is sequentially erased. always 請 characterized in that a structure for holding the data from the current before the predetermined time period
The remote monitoring device according to any one of claims 1 to 3, 5. The portable non-volatile recording medium is configured to be divided into one for recording sequential data and one for recording actual data, and at least the portable non-volatile recording medium for recording actual data sequentially records new data. 4. The recording method according to claim 1 , wherein when recording, the oldest data is sequentially erased, so that data from a present time to a predetermined period before is always retained .
3. The remote monitoring device according to any one of the items up to 3. 6. The portable nonvolatile recording medium according to claim 1, wherein the portable nonvolatile recording medium is an IC memory card .
Item 2. Remote monitoring device according to item 1. 7. A data collection site remote monitoring device according to any one of up claims 1-6, characterized in that the governor chamber