JPH06139478A - Remote monitoring terminal equipment - Google Patents

Abstract

PURPOSE:To provide the remote monitoring terminal equipment which lowers an erroneous recognition ratio of a fact that a device to be monitored is abnormal, and can collect data related to the progress in which the device to be monitored reaches abnormality, and a state of the device to be monitored after the abnormality is detected, in the case it is decided that the device to be monitored is abnormal. CONSTITUTION:In the remote monitoring terminal equipment 1 for inputting the data detected by a sensor installed in a device 3 to be monitored. deciding a state of the device 3 to be monitored and reporting its result to a host device for managing an operation of the device 3 to be monitored, this remote monitoring terminal equipment 1 is provided with a means 121 for holding an allowable value of the data, a means 122 for holding an operating state of the device 3 to be monitored, a monitoring data input means 150 for reading the data from the device 5 to be monitored at a time interval determined in advance, and a means for deciding whether the device 5 to be monitored is abnormal or not from the data read by the means 150, the data held in the allowable value holding means 121, and an operating state of the device 3 to be monitored, held in the monitored device operating state holding means 122.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention collects / determines / stores the status of a monitored device such as industrial equipment / device, and manages the status of the monitored device to manage the operation of the monitored device. The present invention relates to a remote monitoring terminal device that reports to a device.

[0002]

2. Description of the Related Art In a conventional remote monitoring terminal device, data from a sensor installed in a monitored device is analyzed, and when the value of the data deviates from a normal value, noise is superimposed on the data from the sensor. In order to prevent erroneous recognition due to such a situation, the abnormal state is determined to be abnormal because the abnormal state continues for a predetermined time, and the monitored device is reported to be abnormal. Regarding this, for example, Japanese Patent Laid-Open No.
The technique disclosed in Japanese Patent No. 141798 can be referred to.

[0003]

[Problems to be Solved by the Invention] By the way, monitored items
When setting the upper and lower limit values (temperature, hydraulic pressure, etc.), the set normal values are often not satisfied when the device is not in operation or immediately after the operation is instructed. However, according to the conventional technique, in such a case, the monitoring terminal device determines that the monitored device is abnormal and reports the abnormality to the management device, even though the monitored device is operating normally. It was For this reason, on the management device side, the administrator can check the operating status of the monitored device, the content of the reported abnormal data, etc.
It was necessary to check the authenticity of the anomaly report. For such a problem, as an abnormality determination condition, it is also possible to simply lengthen the time during which the abnormal state continues (for example, the time from the start of operation to the steady state of the device), In this case, when an abnormality actually occurs, the treatment may be too late and may cause a serious disaster, and there is a risk that it will not be useful as a monitoring device. Further, in the conventional remote monitoring terminal device, a method is adopted in which the data from the sensor installed in the monitored device is overwritten and held in the position where the oldest data is stored in the data storage means. However, since the storage capacity of the above-mentioned data storage means is extremely small, there has been a problem that the state of the monitored device for a long time cannot be analyzed even if an abnormality is detected and data storage is stopped. On the other hand, simply increasing the capacity of the data storage means causes another problem that the cost of the apparatus increases and the efficiency decreases. The present invention has been made in view of the above circumstances, and an object of the present invention is to solve the above-described problems in the related art, reduce the false recognition rate of the monitored device being abnormal, and monitor the monitored device. It is an object of the present invention to provide a remote monitoring terminal device capable of collecting data regarding the progress of a monitored device in an abnormal state and the state of the monitored device after the abnormality is detected when the device is determined to be abnormal.

[0004]

The above object of the present invention is to input data detected by a sensor installed in a monitored device, determine the state of the monitored device, and determine the result of the operation of the monitored device. In the remote monitoring terminal device that reports to the managed upper device, the data measured by the sensor when the target device (monitored device) corresponding to each sensor is operating normally. Allowable value holding means for holding the allowable value of, monitored device operating state holding means for holding the operating state of the monitored device, and monitoring data input means for reading data from the monitored device at predetermined time intervals , And the data read by the monitoring data input means, the data held in the tolerance value holding means, and the monitored device held in the monitored device operating state holding means From the operation state, the remote monitoring terminal device the monitored device is characterized by having an abnormality determination means for determining whether abnormal or not, or, in addition to each of the units,
First data storage means for recording data from the monitored device read by the monitoring data input means at predetermined time intervals corresponding to each sensor, and stopping recording when there is no data area for which recording is permitted. The data from the monitored device read by the monitoring data input means is overwritten and recorded in the data area recorded at the earliest time point at a time interval different from the above, and the data input from the abnormality determination means is an abnormal value. The second data that stops recording the data from the sensor after recording a predetermined number of data from that point, when it is notified that And a remote monitoring terminal device.

[0005]

In the first remote monitoring terminal device according to the present invention, when the operating state of the monitored device held by the monitored device operating state holding means is the normal operating state, an abnormality is found in the measurement data. If the operating condition of the monitored device is not a normal operating condition, the abnormal condition is not notified even when an abnormality is found in the measurement data, and the realistic monitoring of the monitored device is performed. It is possible to monitor. In addition, in the second remote monitoring terminal device according to the present invention, in addition to the above-mentioned function, it is possible to efficiently collect data with a small storage capacity, which contributes to elucidation of the cause when an abnormality occurs.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows an example of connection between a remote monitoring terminal device according to an embodiment of the present invention and another device such as a monitored device. Further, FIG. 2 shows a detailed configuration of the remote monitoring terminal device according to the present embodiment. The remote monitoring terminal device 1 according to the present embodiment monitors the temperature, oil pressure, etc. of a monitored device such as a gas facility and the like.
Measurement is performed by a sensor (not shown) installed inside, and the measured data is monitored and measured corresponding to the sensor at a cycle instructed by the management device 2. The remote monitoring terminal device 1 analyzes the data input from the monitored device 3, that is, the data measured by the above-described sensor, and when it determines that the monitored device is abnormal, a function of reporting the fact to the management device 2. Have. When the monitored device 3 receives the report that the monitored device 3 is abnormal from the remote monitoring terminal device 1, the management device 2 obtains data from the sensor detecting the abnormality from the remote monitoring terminal device 1, and the remote monitoring terminal device 1 receives the data. In step 1, measures such as an instruction to stop the operation of the device in which the abnormality is detected are taken.

The configuration and function of each part of the remote monitoring terminal device 1 shown in FIG. 2 will be described in detail below. The main control unit 110 uses the management device 2 sent via the communication control unit.
Interpret and execute the instructions from. Specifically, the operation control of the monitored device 3 and the reading / transferring of the data accumulated in the normal data storage unit 140 are performed. Also, the abnormality determination unit 1
The abnormality report is transmitted to the management device 2 based on the abnormality detection report from 20, and the detailed data storage unit 130 is managed. The tolerance holding unit 121 holds the abnormality determination condition for the measurement data for each sensor of each monitored device. The condition of the data value is given as being larger than the set value, smaller than the set value, between two specified values, or the like. The monitored device state holding unit 122 takes in the state of the monitored device given as a digital signal from the monitored device via the monitoring data input unit 150, and holds it for each monitored device. This state information is used together with the data from the sensor installed in the monitored device, when the monitored device has an abnormality. The state of the monitored device is determined by the main control unit 110 in consideration of the time elapsed from the transmission time of the device control signal such as the start / end of operation of the monitored device from the main control unit 110, and the state of the monitored device is monitored. It can also be held in the device state holding unit 122.

The monitoring data input unit 150 takes in data collected by the sensors installed in the monitored device, operating conditions of the monitored device, and the like for each device and each sensor (corresponding to each channel). The value measured by the sensor is input in the form of voltage value, pulse number, and the like. If the input data is analog data, it is converted into a digital code. The signal format (analog / digital) of input data is fixedly set for each input channel. The captured data is sent to the data abnormality determination unit 120, the detailed data storage unit 130, and the normal data storage unit 140. The abnormality determination unit 120 determines the abnormality of the value of the data received by the monitoring data input unit 150 from the monitored device 3. The abnormality determination is performed by comparing the data value from the sensor and the allowable value, and based on the result, the state of the monitored device and the value of the abnormality notification flag. The abnormality notification flag is a flag which is set in a state where the abnormality is detected from the sensor, the set number of observation data is accumulated in the detailed data, and is reset by an instruction from the management device 2. The management device 2
Resets the above-mentioned abnormality notification flag when removing the cause of abnormality of the monitored device and restarting the operation.

In a state where the abnormality notification flag (hereinafter, also referred to as "abnormality flag") is set, even if an abnormality is detected in the data from the sensor, the abnormality determination unit 120 determines that the monitored device is abnormal. Do not report. The determination result is transmitted to the main control unit 110 and the data storage units 130 and 140 as control information. When the input channel is an analog input channel for inputting analog data such as temperature, pressure, voltage and current value, the value of the input data from the sensor deviates from the set upper limit value and the lower limit value, and , If the digital input such as the operation switch of the device set as the related input signal is in the ON state, it is determined to be abnormal.
If the input channel is a digital input channel, an abnormality notification is set for the channel, and when the digital input signal changes to the ON state, it is determined to be abnormal. This is the case, for example, when the locked door opens.

FIG. 4 shows a schematic configuration of the above-mentioned abnormality determining section 120. Details of the operation will be described later. The detailed data storage unit 130 manages the data corresponding to the sensor of each monitored device by the method described below, and in a shorter cycle than the normal data storage unit 140 described below, the abnormality determination result and the monitoring are performed. It has a function of accumulating data from the data input unit 150. Further, the detailed data storage unit 130
When overflow, that is, when the data becomes full, new data is overwritten in the oldest accumulated data area. This is shown in FIG. In FIG. 5, t1 +
Data is stored in the last address of the memory assigned to the channel at time j, and the next data is stored in the first address of the memory.

When the detailed data storage unit 130 receives the notification of the abnormality determination from the abnormality determination unit, the detailed data storage unit 130 accumulates a predetermined number of data, and then stores the data from the sensor set in the above-described apparatus in which the abnormality determination is made. Stop accumulation. Then, when the main control unit 110 gives an instruction to restart the data storage, the data storage is restarted. This is shown in FIG. By controlling the detailed data storage unit as described above, it becomes possible to refer to the detailed information of the monitored device before and after the abnormality is detected. Furthermore, for the parts / measurement items of the monitored device,
It is possible to set the data measurement interval for normal and abnormal conditions. This is effective for analysis when an abnormality occurs. The ordinary data storage unit 140 uses the following method,
Data is managed for each sensor of each monitored device, and has a function of accumulating the data from the monitoring data input unit 150 in a longer cycle than the detailed data storage unit 130 described above.

Further, unlike the detailed data storage unit 130, the ordinary data storage unit 140 stores data at regular intervals regardless of the state of the monitored device. When the data becomes nearly full (for example, 80% of the storable data amount), a warning message is transmitted to the management device 2 via the main control unit 110. The management device 2 periodically receives the above-mentioned ordinary data storage unit 1
The data of 40 is read. And the normal data storage unit 1
When the operation of receiving the data from the 40 memory blocks is completed, the main control unit 110 is instructed to permit the data writing to the memory block area storing the data. Therefore, the normal data storage unit 140 can also continuously store data in a situation where a line abnormality or the like does not occur.

The device control signal transmitting section 160 is provided in the management device 2
Receives an instruction from the main control unit 110 and transmits the instruction content to an external device. Here, examples of the instruction content include starting / stopping a device / apparatus, resetting an alarm, and the like. The instructed result can be confirmed via the channel of the monitoring data input unit 150. Further, the communication control unit controls transmission / reception of commands to / from the management device 2, transmission / reception of status information of the monitored device, and transmission / reception of sensor data. Hereinafter, the operation of this embodiment configured as described above will be described. In the example described below, the operation will be described by taking as an example the case where the data received from one sensor of the monitored device is as shown in FIG. See also the detailed operational flow diagram shown in FIG.

Step 0; to time t0 State of monitored device; operation stop state The management device 2 issues a data accumulation start instruction to each of the data storage units to the remote terminal device (block 8 in FIG. 8).
(See 1, 82). Step 1; time t0 to t1 State of monitored device; operation preparation state When the main control unit 110 receives an operation start instruction of the monitored device 310 from the management device 2, the device control signal transmission unit 160.
An operation start instruction signal to the monitored device 310 is transmitted via the. The monitored device 310 outputs the operating state (ON / OFF of the operation switch) to the dedicated channel. The detailed data storage unit 130 and the normal data storage unit 140 start data storage. What is important here is the monitored device 3
Even if the data received from 10 is not a permissible value, no abnormality is reported (see blocks 83 to 86 in FIG. 8).

Step 2; time t1 to t2 State of monitored device; normal operation state Data is stored in the detailed data storage section 130 and the ordinary data storage section 140. Here, if the measured data exceeds the allowable value, the system is ready to report an abnormality (abnormality report mode). When it is detected that the measured data exceeds the allowable upper limit (U)
At time t2, counting of the number of data stored in the detailed data storage unit is started for the data from the sensor. Step 3; time t2 to t3 'Status of monitored device; abnormal operation status After the abnormal data is detected and a predetermined number of data is stored in the detailed data storage section 130, the data is stored in the detailed data storage section 130. Is stopped (time t2 ′) and the monitored device 310 is reported to be abnormal in the management device 2.
(See blocks 83, 88-90 in FIG. 8).

On the other hand, similarly to the state of step 2, the normal data storage section 140 continues to store the measurement data at regular intervals. By the abnormality report to the management device 2, the management device 2
Are the normal data storage unit 140 and the detailed data storage unit 130.
The data (see FIG. 7) stored in is read, the contents are analyzed, and the cause of abnormality is removed. After removing the anomaly factor,
The management device 2 instructs the operation start of the monitored device 310 and instructs the remote monitoring terminal device to reset the above-mentioned abnormality flag.
(Time t3). Based on the instruction from the management device 2, the stopped data storage in the detailed data storage unit 130 is started. The cause of the abnormality is removed, and the measurement data returns to the normal state (time t3 ′). During time t3 to t3 ', the abnormality is not reported to the management device 2 even if an abnormality is detected in the measurement data.

According to the above embodiment, from the start of operation of the monitored device 310 to the steady state (FIG. 3, t0 to t1).
When the monitored device 310 is in a transient state,
Even if the monitored device 310 itself is normal, the sensor may show an abnormal value, but this is not reported as an abnormality. Also,
When the monitored device 310 is in a normal operation state, an abnormality is reported when the sensor shows an abnormal value for a period instructed by the management device 2 (driver). This ensures high certainty,
In addition, it becomes possible to efficiently perform the operation management of the highly safe device. Furthermore, when an abnormality is detected, the monitored device 31
It is possible to provide detailed status information of each part of the device over a long period of time until 0 becomes an abnormality, and detailed status information of the abnormality detection part before and after the abnormality is detected. Can be well implemented. In addition,
Needless to say, the above-mentioned embodiment shows an example of the present invention, and the present invention should not be limited to this.

[0018]

As described above in detail, according to the present invention, the erroneous recognition rate that the monitored device is abnormal is reduced, and when the monitored device is determined to be abnormal, the monitored device is abnormal. Has a remarkable effect that it is possible to realize a remote monitoring terminal device capable of collecting data relating to the progress of the abnormal condition and the state of the monitored device after the abnormal condition is detected.

[Brief description of drawings]

FIG. 1 is a diagram showing a connection example between a remote monitoring terminal device and another device such as a monitored device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a detailed configuration of a remote monitoring terminal device according to an embodiment.

FIG. 3 is a diagram showing an example of data received from a sensor.

FIG. 4 is an explanatory diagram of a configuration of an abnormality determination unit according to the embodiment.

FIG. 5 is an explanatory diagram of an operation of a detailed data storage unit at a normal time.

FIG. 6 is an operation explanatory diagram of a normal data storage unit.

FIG. 7 is an operation explanatory diagram when an abnormality occurs in the detailed data storage unit.

FIG. 8 is an operation flowchart of the abnormality determination unit.

[Explanation of symbols]

1: Remote monitoring terminal device, 110: Main control unit, 120: Abnormality determination unit, 121: Allowable value holding unit, 122: Device state holding unit, 130: Detailed data storage unit, 140: Normal data storage unit, 150: Monitoring Data input unit, 160: device control signal transmission unit, 170: communication control unit, 2: management device, 3:
Monitored device group 310, 320: Monitored device.

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Kazuo Sobue 1-1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Koichi Ikegawa 19-18 Sakurada-cho, Atsuta-ku, Nagoya-shi, Aichi No. Toho Gas Co., Ltd. (72) Inventor Kazuhiro Nishiguchi 19-18 Sakurada-cho, Atsuta-ku, Nagoya, Aichi Prefecture In Toho Gas Co., Ltd. (72) Akihiro Tanabe 19-18 Sakurada-cho, Atsuta-ku, Nagoya-shi, Aichi No. Toho Gas Co., Ltd. (72) Inventor Masao Kato 19-18 Sakurada-cho, Atsuta-ku, Nagoya-shi, Aichi Prefecture Toho Gas Co., Ltd. (72) Tatsuya Suzuki 19-18 Sakurada-cho, Atsuta-ku, Nagoya-shi, Aichi No. Toho Gas Co., Ltd.

Claims (2)

[Claims] 1. Remote monitoring for inputting data detected by a sensor installed in a monitored device, determining the status of the monitored device, and reporting the result to a host device that manages the operation of the monitored device. In the terminal device, a permissible value holding unit that holds the permissible value of the data measured by the sensor when the device targeted by the sensor (monitored device) is operating normally corresponding to each of the sensors. A monitored device operating state holding means for holding the operating state of the monitored device, monitoring data input means for reading data from the monitored device at a predetermined time interval, and read by the monitoring data input means From the data and the data held in the allowable value holding means and the operating state of the monitored device held in the monitored device operating state holding means,
A remote monitoring terminal device comprising an abnormality determining means for determining whether or not the monitored device is abnormal. 2. In addition to the above-mentioned means, corresponding to each sensor,
First data storage means for recording data from the monitored device read by the monitoring data input means at a predetermined time interval, and stopping recording when there is no data area for which recording is permitted; The data read from the monitored device by the means is overwritten and recorded in the data area recorded at the earliest time point at a different time interval from the above, and the data input from the abnormality determining means indicates an abnormal value. If you are notified, from that point,
A remote monitoring terminal device comprising: a second data storage unit that stops recording of data from the sensor after recording a predetermined number of data items until a restart of recording is instructed.