JPH08307962A - Remote monitoring device - Google Patents

Abstract

PURPOSE: To allow a common center monitoring device to perform remote monitoring many fields for collecting data to a governor, etc., especially the monitoring of hunting abnormality of a city gas supply system in many data collecting sites. CONSTITUTION: This device is composed of site processors 3 installed at the data collection sites and the common center monitoring device 4 connected with the many site processors through a communication line 5. The site processor 3 is composed of a data for monitoring collection means A, a data reading and writing means 12 with respect to a portable nonvolatile recording medium 13, a data abnormality monitoring means B, and a means C communicating through the communication line. The abnormality monitoring means is provided with a function judging abnormality by comparing the fluctuation of data fetched in a memory at high speed with a set value so that at the point of the time of judging abnormality, measuring data in a prescribed time before and after then is recorded in the nonvolatile recording medium.

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, and more particularly to detection of hunting abnormality such as pressure.
The present invention relates to a remote monitoring device having an alarm function and the like.

[0002]

2. Description of the Related Art The current inspection inspection work in a governor for supplying city gas is carried out every week based on the safety regulations for the purpose of leak inspection, replacement of pressure-sensitive recording paper, recovery, etc. Therefore, a recorder for recording the primary side pressure, the secondary side pressure and the governor opening is installed in the governor chamber accommodating the governor. The recorder records the measured data on a round chart (recording paper for one week). The round chart on which the data is recorded is collected, and the person takes it home and inspects it one by one to check for abnormal pressure hunting. ing.

On the other hand, there has been an attempt to remotely monitor governors installed in a large number of places by using a common center monitoring device. For example, as an attempt to do so, a data collecting device equipped with a communication means with the center monitoring device is installed in each governor, and the monitoring measurement data of each governor collected by the data collecting device is transmitted to the center monitoring device through a communication line. Then, there is a method in which the center monitoring device sequentially collects data and records and determines abnormality.

[0004]

The former method has the following problems. Abnormalities such as pressure hunting can only be grasped at weekly inspections or by reporting. The weekly inspection costs are increasing. It is necessary to inspect the collected round charts one by one to check for abnormalities such as pressure hunting. When attempting to determine the abnormality by computer processing the collected circle chart data, it is difficult to input because there are many necessary data, and the characteristics of each governor must be converted into data in advance, which makes the determination process difficult. Is.

In the latter method, the amount of data collected by the center monitoring device becomes enormous and, as described above,
The characteristics of each governor must be converted into data beforehand and stored in order to determine anomalies, which requires a huge amount of arithmetic processing, which requires a large-scale system in terms of both hardware and software. Is higher and not practical. Therefore, the present invention aims to solve such a problem.

[0006]

In order to solve the above-mentioned problems, according to the present invention, an on-site processing device installed at a data collection site and a common center monitoring device connected to many on-site processing devices via communication lines. The on-site processing device includes a monitoring data collecting means for collecting monitoring data at high speed in a memory, a reading / writing means for reading / writing data from / to a nonvolatile recording medium, a data abnormality monitoring means, and a communication line. The communication means is configured, and the abnormality monitoring means is configured with a function for comparing the fluctuation of the data captured in the memory with the set value at high speed to judge the abnormality, and when the abnormality is judged, a predetermined time before and after the abnormality is detected. We propose a remote monitoring device that is configured to record the measurement data of 1. in a non-volatile recording medium.

In the present invention, in the above structure,
It is proposed that the set values for the abnormality determination in the abnormality monitoring means are the deviation, the amplitude, the cycle and the number of repetitions, and that these set values can be changed through the communication means.

In the present invention, in the above structure,
The nonvolatile recording medium is configured to record the statistic amount of the measurement data related to the setting value for abnormality determination as the actual data, and the sequential measurement data is set at each time interval longer than the time interval at which the data is collected in the memory at high speed. Is proposed to be recorded.

Further, in the present invention, in the above structure, the non-volatile recording medium has a recording capacity for recording successive data and past performance data for a predetermined period of time respectively, and when new data is sequentially recorded, the oldest data is recorded. It is proposed that the data from the present to the predetermined period before is always retained by sequentially erasing the data.

Further, the present invention proposes that the nonvolatile recording medium in the above structure is a portable recording medium such as an IC memory card.

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

[0012]

Data from the various monitoring equipments at the data collection site are collected at high speed by the data collection means of the site processing device at regular time intervals and stored in the memory. The sequential data is constantly monitored by the abnormality monitoring means, and the abnormality determination means determines the abnormality. As one of the abnormalities, the hunting abnormality is the fluctuation of the measurement data.
Judgment is made by comparing with the set values for the deviation, the amplitude, the cycle, and the number of repetitions. That is, if the fluctuation of the measured data exceeds the deviation range, the amplitude exceeds the setting value of the fluctuation width, and if the fluctuation is repeated more than the set number of times within the set value of the fluctuation cycle, the occurrence of hunting abnormality is detected. judge.

When it is determined that the hunting is abnormal, the measurement data for a predetermined time before and after that time is recorded in the non-volatile recording medium. Further, when the occurrence of the hunting abnormality is determined from the measurement data, the abnormality monitoring means compares the abnormality data with the past measurement data recorded in the non-volatile recording medium to determine whether to issue an alarm. That is, the data that has issued an alarm due to a past hunting abnormality is compared with the data of this time, and if there is similarity or the fluctuation range of this time is larger, it is determined that an alarm is required.

When it is determined that the alarm is necessary, the abnormality monitoring means calls the center monitoring device by the communication means and transmits the abnormality determination result to the center monitoring device.

In this way, the center monitoring device can detect the occurrence of hunting abnormality at each data collection site without collecting and processing the data of the measuring equipment and the like by itself,
It is possible to reduce system resources for this purpose, and it is possible to take prompt action without requiring skill.
If necessary in the center monitoring device, the data recorded in the non-volatile recording medium can be obtained by issuing a transmission request for the data in the non-volatile recording medium to the communication means of the on-site processing device that has reported the abnormality, This data can be efficiently used for analysis and judgment of anomalies.

There is a case where some hunting is permissible, that is, a small hunting which does not cause any trouble may occur. Even in such hunting, if the judgment is made based on the above-mentioned set value, unnecessary alarms are often issued to the center monitoring device. The inconvenience caused and vice versa occur. In this case, the center monitoring device can cope with this by changing the set value for the abnormality determination in the abnormality monitoring means via the communication line as needed.

As described above, the nonvolatile recording medium includes
At the time when it is judged to be abnormal, the measured data of the predetermined time before and after that and the statistical amount of the measured data related to the set value for the abnormality judgment are recorded as actual data, and the time longer than the time interval to collect in the memory at high speed. It is possible to have a configuration in which sequential measurement data is recorded at each interval. The non-volatile recording medium has a recording capacity for recording successive measurement data and actual data for a predetermined period of time, and when new data is sequentially recorded, by sequentially erasing the oldest data, the non-volatile recording medium is always recorded for a predetermined period from the present. Can hold data. For example, if the recording capacity is such that data can be stored for a long period of time such as one year, the data can be repeatedly used continuously for a long period of time while always holding the latest one year of data. Further, the nonvolatile recording medium can be collected from the on-site processing device and processed by a personal computer or the like, if necessary.

The data recorded in the non-volatile recording medium may be read and processed by a portable terminal device at the data collection site as needed even before a predetermined period of time elapses, or via the communication line as described above. It can be read and processed by the center monitoring device.

[0019]

EXAMPLE An example of the present invention will be described below with reference to FIGS. FIG. 1 schematically shows the overall configuration of the present invention.
Reference numerals 1 (1a, 1b, ..., 1n) are 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 position gauge of the governor main body 2 and the governor main body 2 are provided. Various monitoring devices such as pressure sensor, flow meter, gas detector, and other measuring devices on the primary and secondary sides, and abnormality detection devices such as governor shutoff detection sensor and SI sensor abnormality detection sensor (not shown). ) Is installed 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 is a common center monitoring device for monitoring the operation of the governor main 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 is a public line, a private line, or a wireless line applied individually or in combination, and 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 apparatus 3 which is constituted by a microcomputer application apparatus or the like, and the reference numeral 6a connected to the on-site processing apparatus 3 is an opening gauge of the governor main body 2 and a governor. A measurement device group such as a pressure sensor, a flow meter, and a gas detector on the primary and secondary sides of the main body 2 is shown, and these are configured to output measurement data in analog amounts. Reference numeral 6b indicates 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 collecting means A, the abnormality monitoring means B, among the components described above,
A block group corresponding to the communication means C is shown surrounded by a two-dot chain line in the figure.

The on-site processing unit 3 includes the measuring instrument group 6a.
And input means 7a and 7b for connecting the abnormality detection device group 6b. That is, reference numeral 7a is a measurement data input means, which is composed of an analog preprocessing circuit, an A / D converter, a level converter, etc., and has a function of converting the analog data of each measuring device into a predetermined digital signal. It is configured to let. Reference numeral 7b is an abnormality detection data input means, which is composed of a level conversion circuit or 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 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 to intermittently transfer 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 instrument group 6a read by the data reading means 8 is a raw data, or a non-volatile data such as an IC memory card or the like is read through the recording medium reading / writing means 12 at predetermined intervals by performing appropriate arithmetic processing or the like. The data is recorded on the recording medium 13 over time, and the actual data for the period until then,
For example, the statistical amount of each item at each time, for example, data such as average value and standard deviation is recorded. Further, the amplitude and cycle of the hunting abnormality that gives an alarm and the amplitude and cycle of the hunting that does not give an alarm are recorded on the non-volatile recording medium as record data relating to the determination of the hunting abnormality.

For example, when the recording capacity of the non-volatile recording medium is set to one year of the above data, and when this recording period is exceeded, new data is sequentially recorded, the oldest data is sequentially erased, so that It is possible to retain data for a predetermined period from the present, that is, for one year. The data recording interval on the non-volatile recording medium 13 is determined in consideration of the capacity of the non-volatile recording medium 13 and the continuous data recording period, and in the embodiment, a time longer than the sampling time, for example, 1 minute. Every time. The recording interval can be different for each data item.

Of the data read intermittently by the data reading means 8, the data of the measuring device group 6a is compared with the set value and the actual data by the data processing means 9, correction and other calculations are performed, and as a result thereof. Processing such as alarm generation is performed. The processing for generating an alarm includes the above-described determination of hunting abnormality and determination of alarm generation.

For example, the primary and secondary pressures of the governor body 2 from the measuring device group 6a, the opening degree of the governor body 2, the flow rate,
The data such as the gas concentration is read by the data reading means 8 at every sampling time of, for example, 0.5 seconds, and compared with the preset upper and lower limit values in the data processing means 9 to monitor the upper and lower limits. . Along with this, predetermined calculations such as data difference calculation between adjacent sampling points, flow rate pressure correction, or time-dependent weighted average processing of data are performed, and these data are also compared with the upper and lower limit set values as appropriate. Done. It should be noted that the sampling time is set to be short so as to correspond to the maximum data change speed assumed when an abnormality occurs.

When a process abnormality is determined as a result of the above data abnormality determination and measurement instrument abnormality determination, the data processing means 9 issues an alarm output to the abnormality determination means 10 and outputs the corresponding data. It is recorded in the progress data storage means 11 as progress data together with the data before and after that.
The progress data storage means 11 is composed of a non-volatile storage means such as a battery-backed SRAM.

Reference numeral 10 is the above-mentioned abnormality determining means,
The abnormality determination means 10 monitors the alarm from the data processing means 9 and the abnormality detection output from the abnormality detection device group 6b obtained via the data reading means 8 to determine the abnormality.
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 an abnormality handling process in a predetermined procedure. The abnormality handling processing includes abnormality determination, abnormality importance classification processing, processing corresponding to abnormality importance, output to the communication management means 14, and the like.

That is, when the data processing means 9 issues an alarm, the abnormality determining means 10 determines from the content of the abnormality data that
It is determined whether the abnormality is a process abnormality or the measurement device group 6a. At this time, the abnormality determining unit 10 accesses the nonvolatile recording medium 11 via the recording medium reading / writing unit 12 as necessary depending on the content of the abnormality, and records the abnormal data in the nonvolatile recording medium 13. It is possible to judge the abnormality by comparing with similar data of. In addition to the abnormality data itself, the progress data temporarily recorded in the progress data storage means 11 can be used for such abnormality determination operation.

FIG. 4 schematically shows the data of the measuring equipment. The range indicated by the two-dot chain line in the figure shows the range R within the standard deviation of the past data, and this range R is Obtained by calculating the average value and standard deviation of each measurement item for the appropriate time until the same time, measured by the measuring instrument,
This performance data is stored in the nonvolatile recording medium 13 as described above.
To record. In the figure, the alternate long and short dash lines above and below the range R indicate the upper and lower limit levels for abnormality determination. The thick solid line D in the figure shows the transition of the data this time, and points a, b, c, d, e, f
The point, g point, ... Exceeds the upper or lower limit level, and the cycle of exceeding these levels is shorter than the undulation cycle of the actual data as shown in FIG.
Therefore, the abnormality determination means 10 determines that the hunting is abnormal.

A set value for determining hunting abnormality, for example, a set value of amplitude is initially set to upper and lower limit levels to determine hunting abnormality, and when the number of determinations is small,
By gradually lowering the level of the set value, it becomes possible to detect even a small hunting abnormality. Further, when the set value gradually decreases and the number of times of hunting abnormality determination increases, the allowable hunting abnormality determination can be reduced by increasing the set value again. The change of the setting value can be performed by the center monitoring device 4 via the communication line 5 and the communication means C.

The abnormality determining means 13 determines the occurrence of the abnormality as described above, and classifies the content of the abnormality into four levels of importance, such as the most important, important, less urgent and less urgent. Then, these contents are output to the communication management means 14.

When the importance of the abnormality is, the communication managing means 14 interrupts other processing which is currently operating and performs the abnormality handling processing as the interrupt processing. In this case, as the priority processing, the abnormality handling processing is performed in preference to other processing after the processing currently in operation is completed. In this case, as the normal processing, the abnormality handling processing is performed after completion of other processing prior to this.
In the case of (3), it is a case of an unimportant abnormality that can be clearly recognized as a device failure, and in this case, the abnormality handling processing is performed as processing with low priority.

Reference numeral 15 is a communication control means managed by the communication management means 14, 15a is a dedicated / wireless line communication control means, 15b is a public line communication control means, and 15c is a serial communication communication control means. Communication control means 15
a is connected to the wireless communication device 17 via the dedicated / wireless communication modem 16a, and is connected to the communication device control means 18,
The activation control of the wireless communication device 17 is performed via the control output means 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, and the transmission / reception means 1
A portable terminal device and other modems can be connected to 6c.

FIG. 3 is a block diagram showing the basic structure of the center monitoring device. The center monitoring device 4 includes a communication means D corresponding to the communication means C of the on-site processing apparatus 3, a monitoring means 21, and a display means 22. , Alarm means 23, and operation input means 24. As the communication means D, as in the case of the on-site processing apparatus 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. The communication control means 26b for public use and the public communication modem 27b are configured.

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

For example, when the public line 18 is used as the communication line 5, the communication management means 14 has the communication control means 15
b is selected and the center monitoring device 4 is called via the transmitting / receiving means 16b to establish a line connection. Next, the communication management means 14 of the on-site processing device 3 and the monitoring means 21 of the center monitoring device 4 perform mutual confirmation to establish a data link, and first, the on-site processing device 3 side to the center monitoring device 4 and then the abnormality determination means 10 The data of the abnormality content determined by is transmitted.

In the center monitoring device 4, the monitoring means 23 displays the data of the content of the abnormality transmitted from the on-site processing device 3 on the display means 22 and, if necessary, the alarm means 23.
Generates an alarm. In this way, the center monitoring device 4 can detect the occurrence of an abnormality and its content without processing the raw data of the equipment at the data collection site, and can respond promptly.

Further, 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 means 21 of the center monitoring device 4 to the communication management means 14 of the on-site processing device 3 by inputting from the operation input means 24 or the like. When sent,
The communication management means 14 accesses the non-volatile recording medium 13 via the recording medium reading / writing means 12 in accordance with the content of the data transmission request, reads predetermined data, and transmits this to the center monitoring device 4 side. In this way, the center monitoring device 4 side can collect and analyze raw data of the equipment at each data collection site as needed. Further, when the temporary storage means 11 for the progress data is configured as described above, the data in the temporary storage means 11 can also be configured to be transmitted to the center monitoring device 4 as needed. .

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, opens the line, and ends the abnormality handling processing.

The nonvolatile recording medium 13 has, for example, a capacity capable of recording the above-mentioned data for one year or more, and as described above, when sequentially recording new data beyond the period corresponding to the storage capacity, the oldest data is recorded. By sequentially erasing, the data for the latest one year can be retained by repeatedly using it. Alternatively, in some cases, the data can be collected from the on-site processing device 3 once a year, and taken back for data analysis with a personal computer or the like. In this case, a means for leaving the actual result data in the on-site processing device 3 is required.
Further, if necessary, the portable terminal device 28 is connected to the modemless serial interface 16c, and a data transmission request is sent to the communication management means 14 via the communication control means 15c for serial communication, whereby nonvolatile recording is performed. Medium 1
It is also possible to read the data recorded in No. 3 to the portable terminal device 28 or the like for processing.

[0043]

As described above, the present invention has the following effects. The on-site processor automatically determines the hunting abnormality and notifies the center monitoring device of the necessary alarm, so it is possible to easily detect the hunting abnormality by using general-purpose software such as a personal computer at the monitoring center, and take prompt action. Processing can be performed. Abnormalities can be monitored in real time at all times regardless of weekly inspections. Therefore, it is not necessary to perform a collection operation for each short period of time such as the on-site recording paper system, and the data can be directly processed by a computer without performing the input work necessary for the on-site recording paper system. As compared with the case where data is sequentially collected in the center and computer-processed as described above, the processing load of the center monitoring device is small, neither the hardware nor the software becomes enormous, and therefore the CPU load and the cost are large. Can be reduced. Since the operation of the center monitoring device is simple, no expert is required. It is possible to ensure the detection of the abnormality by recording the actual data on the portable non-volatile recording medium and using it as the judgment material of the abnormality of the measured data.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing an example of the basic configuration of the on-site 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 body 3 on-site processing device 4 center monitoring device 5 communication line 6a measuring 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 reading / writing means 13 Portable non-volatile recording medium 14 Communication management means 15a, 26a Dedicated / wireless line communication control means 15b, 26b Public line Communication control means 15c serial communication communication control means 16a, 27a dedicated / wireless line communication modems 16b, 27b public communication modem 16c modemless serial interface 17 wireless communication equipment 18 communication equipment 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

Claims (8)

[Claims] 1. A site processing device installed at a data collection site and a common center monitoring device connected to a number of site processing devices via communication lines.
The monitoring data collecting means for collecting the monitoring data at high speed in a memory, the reading / writing means for reading / writing data from / to the non-volatile recording medium, the data abnormality monitoring means, and the communication means by the communication line are configured. Configure a function to judge the abnormality by comparing the fluctuation of the data captured in the memory with the set value at high speed, and record the measured data for a predetermined time before and after that in the nonvolatile recording medium when the abnormality is judged. Remote monitoring device characterized by 2. The remote monitoring apparatus according to claim 1, wherein the set values for the abnormality determination of the data fluctuation in the abnormality monitoring means are a deviation, an amplitude, a cycle, and the number of repetitions. 3. The remote monitoring device according to claim 1, wherein the non-volatile recording medium has a structure in which a statistical amount of measurement data relating to a set value for abnormality determination is recorded as actual data. 4. The non-volatile recording medium is configured to record sequential measurement data at each time interval longer than the time interval at which data is collected in the memory at high speed.
Described remote monitoring device 5. The remote monitoring device according to claim 1, wherein the set value for the abnormality determination in the abnormality monitoring means is configured to be changeable via the communication means. 6. The non-volatile recording medium has a recording capacity for recording sequential data and past performance data for a predetermined period of time, and when new data is sequentially recorded, the oldest data is sequentially erased so that the data is always recorded. 2. The remote monitoring device according to claim 1, wherein the data is stored from the present to a predetermined period before. 7. The remote monitoring device according to claim 1, wherein the non-volatile recording medium is a portable recording medium such as an IC memory card. 8. The remote monitoring device according to claim 1, wherein the data collection site is a governor room.