JP3158594B2 - Remote monitoring and control system - 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 control system used for remote control of a dam management system, a river management system, an agricultural water management system, a water and sewage management system, and the like.

[0002]

2. Description of the Related Art FIG. 4 shows the configuration of a conventional remote monitoring control system. In FIG. 4, 1 is a controlled device to be controlled, 2 is an interface device that is directly connected to the controlled device 1 and interfaces an input / output signal, and 3 includes a transmission line and relays the input / output signal. It is an intermediate device. 4 transmits a signal (hereinafter simply referred to as an operation command) 5 for carrying an operation command for operating the controlled device 1, and a signal (current value of various data related to the operation) from the controlled device 1 ( Hereinafter, it is a command output device that receives the current value (hereinafter simply referred to as “current value”) 7.

Next, the operation of the above conventional example will be described. The command output device 4 transmits, via the intermediate device 3 and the interface device 2, an operation command 5 for bringing the current value of the controlled device 1 closer to the target value, and receives the command transmitted via the interface device 2 and the intermediate device 3. Control device 1
Then, the state of the controlled device 1 is monitored by comparing the current value 7 from the target value with the target value. Then, when the current value 7 matches the target value, a stop determination is made and the transmission of the operation command 5 is stopped.

[0004]

However, in the conventional remote monitoring and control system described above, after the command output device transmits the target value due to the influence of the bus cycle and the transmission cycle on the bus and the transmission line of the intermediate device, the controlled device is not controlled. There is a problem that a delay time occurs until the current value is received from the controller, and when the stop determination is made and the transmission of the operation command is stopped, the current value already exceeds the target value.

Further, in a system in which a plurality of controlled devices are controlled by a single command output device in which a plurality of interface devices are housed in the same housing, a current command from each controlled device obtained via each interface device is used. Since the stop determination is performed by comparing each of the values with the respective target value, there is a problem that the load on the command output device becomes heavy.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problem. It is an object of the present invention to accurately match a current value of a controlled device to a target value without being affected by a configuration of an intermediate device in a remote operation. It is an object of the present invention to provide an excellent remote monitoring and control system.

[0007]

According to the present invention, there is provided a command output device for transmitting an operation command for operating a controlled device and receiving a current value of various data related to the operation from the controlled device. And an interface means for relaying an operation command and a current value between the controlled device and the command output device, and for storing a target value transmitted from the command output device.

[0008]

According to the present invention, the interface means having the above structure receives and stores a predetermined target value from the command output device, and stops the relay of the operation command when the current value matches the predetermined target value. Thus, the current value can be made to exactly match the predetermined target value without being affected by the delay of the intermediate device including the transmission line.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows the configuration of the first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a controlled device to be controlled, 21 denotes an interface device that is directly connected to the controlled device 1 and interfaces with an input / output signal, and 31 includes a transmission line and relays the input / output signal. It is an intermediate device. Reference numeral 41 denotes a command output device that transmits an operation command 5 for operating the controlled device 1 and receives a current value 7 from the controlled device 1. The difference from the configuration of FIG. 4 is that a signal carrying a specific target value from the command output device 4 to the interface device 21 via the intermediate device 31 (hereinafter referred to as a signal).
6 (simply called a target value). The target value 6 is stored in a memory (not shown) in the interface device 21.

Next, the operation of the first embodiment will be described. The command output device 41 transmits, via the intermediate device 31 and the interface device 21, an operation command 5 for bringing the current value of the controlled device 1 closer to the target value. The target value includes a specific target value and a non-specific target value. The specific target value requires immediacy, and can be easily compared with the current value 7. The command output device 41 transmits a target value 6 which is a specific target value to the interface device 21. The target value 6 is stored in a memory (not shown), and compares the current value output from the controlled device 1 with the target value. When the current value and the target value match, a stop determination is made in the interface device 21 and the relay of the operation command 5 from the command output device 41 is stopped. In this way, by giving the stop function not only to the command output device 41 but also to the interface device 21 itself, the stop operation can be performed immediately without being affected by the delay in the intermediate device 31 including the transmission line.
The stop operation of the complicated operation command 5 that cannot be processed by the interface device 21 is performed by the command output device 41 at the current value 7.
By comparing the target value with a target value other than the specified value.

As described above, both the command output device 41 and the interface device 21 have a stop function, and the stop function requiring immediacy is the interface device 21.
, The current value of the controlled device can be made to exactly match the target value without being affected by the configuration of the intermediate device including the transmission line in an operation from a distance.

Next, a second embodiment will be described with reference to FIG. FIG. 2 shows a detailed internal configuration of the interface device 22. Reference numeral 8 denotes a relay unit that relays an operation command 5 transmitted from a command output device (not shown) to a controlled device (not shown). 9 is the current value 7 from the controlled device
And a target value 61 transmitted from the command output device, and is a stop determination means for providing a relay stop command signal (hereinafter simply referred to as a stop command) 10 to the relay means 8.

Next, the interface device 2 having the above configuration
Operation 2 will be described. First, prior to the remote operation of the controlled device, the target value 61 is transmitted from the command output device,
It is stored in a memory (not shown) of the stop determination means 9. After that, the operation command 5 is transmitted from the command output device to the relay means 8, subjected to amplification, impedance conversion, and other signal processing, and supplied to the controlled device. The controlled device is operated in accordance with the operation command 5, and various data that changes as a result, that is, the current value 7, is transmitted to the interface device 22.
Is output to the stop judging means 9. The stop determination means 9 compares the current value 7 with the target value 61 and determines that the current value 7 is equal to the target value 61.
Is given, a stop command 10 is given to the relay means 8 to stop the relay of the operation command 5.

Although the current value 7 is also transmitted to the command output device, the command output device does not compare it with the target value.
It is used as storage data and other processing.

Therefore, by providing the stop function only to the interface device 22 to improve the immediacy of the stop determination, the operation can be controlled without being affected by the configuration of the intermediate device including the transmission line in a remote operation. It is possible to make the current value of the device exactly match the target value.
In addition, the burden on the command output device can be reduced.

FIG. 3 shows the configuration of a third embodiment of the present invention. In FIG. 3, reference numerals 11a to 11c denote a plurality of controlled devices.
This is one control device for remotely controlling 1a to 11c. The control device 42 includes interface circuits 12a to 12c and a command output device 14 provided corresponding to each controlled device, and a bus 13 connecting these devices, and is housed in an integral housing.

The operation of the third embodiment will be described. Operation commands 5a to 5c for operating each controlled device are transmitted from the command output device 14 via the bus 13 and the interface circuits 12a to 12c. Each controlled device operated by each of these operation commands transmits its current value 7a to 7b to the corresponding interface circuit 12a to 12c. Each of the interface circuits compares the received current value with each of the target values stored in advance, and when they match each other, makes a stop determination and stops transmission of the operation command.

As described above, since each of the interface circuits corresponding to each of the controlled devices has the stop function, the load on the command output device that remotely controls the plurality of controlled devices in parallel can be reduced. .

[0019]

The present invention has the following effects, as apparent from the above embodiment. 1. When remote operation of the controlled device, the interface device performs the function of comparing and stopping the specific target value and the current value that require immediacy, so that even if high-speed operation is required, the transmission line There is an effect that the current value can be made to exactly match the target value without being affected by the delay caused by the intermediate device including, and that a remote operation with high immediateness can be performed.

In addition to the above effects, the load on the command output device, which is the operation control means, can be reduced by the interface device having functions of comparing and stopping all target values and current values. 2. In a case where a plurality of controlled devices are remotely controlled by one command output device, a function of comparing and stopping respective target values and current values is provided for each interface circuit provided corresponding to each controlled device. Is provided, the load on the command output device can be reduced. Therefore, in the case of a system that requires high-speed processing, the cost performance of system functions can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing the configuration of a first embodiment of a remote monitoring control system according to the present invention;

FIG. 2 is a diagram showing a configuration of an interface device of a second embodiment of the remote monitoring control system according to the present invention;

FIG. 3 is a diagram showing the configuration of a third embodiment of the remote monitoring control system according to the present invention;

FIG. 4 is a diagram showing a configuration of a conventional remote monitoring control system;

[Explanation of symbols]

 1, 11a, 11b, 11c Controlled device 5, 5a, 5b, 5c Operation command 6 Specific target value 7, 7a, 7b, 7c Current value 8 Relay means 9 Stop determination means 10 Stop command 12a, 12b, 12c Interface circuit 13 Bus 14, 41 Command output device 21, 22 Interface device 42 Control device 61 Target value

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04Q 9/00-9/16 G05B 1/00-7/04 G05B 11/00-13/04 G05B 17 / 00-17/02 G05B 21/00-21/02

Claims (3)

(57) [Claims] 1. A remote monitoring control system that remotely controls a controlled device and monitors and controls current values of various data related to operations in the controlled device, wherein an operation command for operating the controlled device is provided. And a command output device for transmitting the current value from the controlled device, and an interface means for relaying the operation command and the current value between the controlled device and the command output device, the interface means comprising: A remote monitoring control system, wherein a specific target value is received and stored from a command output device, and relaying of the operation command is stopped when the current value matches the specific target value. 2. The apparatus according to claim 1 , wherein said command output means is configured to output
Contains the calculated value to be calculated and the target value corresponding to the calculated value.
And comparing the calculated value and the target value,
When the values match, the output of the operation command is stopped.
2. The remote monitoring control system according to claim 1, 3. The apparatus according to claim 1, wherein the command output device remotely controls a plurality of controlled devices, and the interface means is provided corresponding to each of the controlled devices. Remote monitoring and control system.