JPS62193396A - Remote supervisory system - Google Patents

Abstract

PURPOSE:To make prompt transmission possible without being controlled by a monitor station by providing a means that can rearrange status change data in the order of priority and transmit from status change data having highest priority. CONSTITUTION:A shift register 4 for frame detection is stored at the timing of control signals 301a, and the state change data 401 of preceding station are converted to parallel data and supplied to a priority detecting section 5. The preceding station state change data 401 are compared with the group of state change data accumulated in the priority order detecting section 5, and accumulated at positions corresponding to the priority order. It own station state change data 701 prepared by its own state change preparing section 7 are, similarly with the preceding station state change data 401, compared with the group of state change data inputted and accumulated in the priority order detecting section 5 at the timing of its own state change generating signals 702 controlled by clock of control signals 301d, and accumulated at positions corresponding to the priority order of its own station state change data 701.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a remote monitoring system, and in particular, the present invention relates to a remote monitoring system, and in particular, the monitoring station monitors the operating status and failure status of equipment installed at the monitored station, so that changes in the status of monitored items are monitored. The present invention relates to a remote monitoring system in which a monitored pulse signal is transmitted from a monitored station to a monitoring station.

[Conventional technology]

Conventionally, the basic technologies for this type of remote monitoring system include a cyclic transmission method in which a monitoring pulse signal is set for each monitored station, and a cyclic transmission method in which the monitored station transmits and sends a monitoring pulse signal under the control of the monitoring station. Polling transmission method for stopping.

Alternatively, remote monitoring techniques such as a state change transmission method are used in which a monitored station generates a monitoring pulse signal and transmits it to a monitoring station when a state changes.

[Problem that the invention seeks to solve]

Among the conventional remote monitoring methods mentioned above, the cyclic transmission method requires setting a monitoring pulse for each monitored station, so the signal transmission path, state change detection circuit, and synchronization circuit are It has the disadvantage that it is required for each monitoring station.

In addition, in the polling transmission method, the monitored station is controlled by the monitoring station, so each monitored station requires a controlled circuit to receive control signals from the monitoring station and a signal transmission path to receive the control signals. Another drawback is that it takes longer than other methods from the time a state change occurs to the time the state change signal is sent to the monitoring station.

Furthermore, the state change signaling method not only requires a circuit that generates a monitoring pulse signal when the state changes, but also requires consideration of a circuit that controls the transmission order when state changes occur simultaneously in multiple stations. There is a drawback.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, to transmit the monitoring pulse status through a single transmission line, and to provide a remote control system that does not require control by a monitoring station and also takes into account the situation where multiple stations change their status at the same time. It is an object of the present invention to provide a remote monitoring system with a simple configuration that allows rapid confirmation of status changes by providing a monitoring means.

[Failure to solve the problem]

The system of the present invention includes a frame detection shift register that detects a frame of a received monitoring pulse signal, a self-state change data creation section that creates self-state change data, and a state change that is received from the frame detection shift register. A priority detection section that compares the data with accumulated state change data and outputs state change data with a high priority, and a state change data register that stores the state change data output from this priority detection section. Prepared and configured.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing a practical example of the present invention;
FIG. 2 is a monitor pulse code configuration diagram showing an example of the code configuration of the monitor pulse signal in the embodiment of FIG. 1.

In FIG. 1, an input monitoring pulse signal 101 is bit-synchronized by a bit synchronizer 1 and is supplied as a pulse signal to a frame detection shift register 4 and also to a synchronization signal detector 2.

This synchronization detection pulse signal outputted from the bit synchronization section 1 is accumulated in the frame detection shift register 4, and a synchronization signal is detected by the synchronization signal detection section 2 and output 201.
The signal is provided to the control signal generation section 3 as a signal.

The control signal generation unit 3 generates control signals 301a, b, c,
d and use these as timing signals in a frame detection shift register 4. State change data register 6, priority detection section 5. Each of the data is supplied to the local station state change data creation section 7.

Now, the frame detection shift register 4 uses the control signal 30
Accumulated at timing 1a, previous station state change data 4
01 is supplied to the priority detection unit 5 in a format converted into parallel data. This previous station state change data 401 is compared with the state change data group stored in the priority detecting section 5 and stored at a position corresponding to the priority.

Self-state change data 701 created by the own-station state change creation section 7 is sent to the priority detection section 5 at the timing of the own-station state change generation signal 702, which is controlled by the clock of the control signal 301d, similarly to the previous station state change data 401. The state change data 701 is compared with a group of state change data that has been input and stored in the state change data 701, and is stored at a position corresponding to the priority of the own state change data 701.

The state change data with the highest priority among the state change data group accumulated in the priority detection unit 5 is the transmission state change data 501, and the timing of the parallel data input timing signal 502 controlled by the timing of the control signal 301C. The data is supplied to the state change data register 6 and stored therein.

While the state change data with the highest priority is inserted in this way, the state change data register 6 sends the output monitoring pulse signal 601 to the next station at the timing of control (H number 301b).

In FIG. 2, a monitoring pulse signal 500 is composed of a synchronization signal l and a state change data frame m, and the code structure of the state change data frame m is station code data n.
, monitoring item code data X, on/off type flag y, and priority classification code 2.

〔Effect of the invention〕

As explained above, the present invention detects the frame of the received monitoring pulse signal, creates state change data of its own station, compares the received state change data with accumulated state change data, and determines the priority. While selecting state change data with a high priority, the state change data input from the previous station and the state change data accumulated at the local station are sorted in descending order of priority, and the state change data with the highest priority is transmitted. By providing a possible means to transmit the monitoring pulse signal, the transmission path for the monitoring pulse signal is reduced to one, and the state change information of multiple monitored stations can be transmitted with a relatively simple circuit configuration and can be controlled by the monitoring station. This has the effect of realizing a remote monitoring system that can transmit data quickly without any problems.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a code configuration diagram of a monitoring pulse signal showing an example of the code structure of a monitoring pulse signal in the embodiment of FIG. 1... Pit synchronization section, 2... Synchronization signal detection section, 3... Control signal creation section, 4... Frame detection register, 5...- ...Priority detection unit, 6...State change data register, 7...
Local station status change data register, 500...Monitoring pulse signal. Agent Patent Attorney Susumu Uchihara Figure 1

Claims (1)

[Claims] a frame detection shift register that detects frames of the received monitoring pulse signal; a self-state change data creation section that creates state change data of its own station; and a state change data generator that accumulates the state change data received from the frame detection shift register. It is equipped with a priority detection section that outputs state change data with a high priority by comparing it with certain state change data, and a state change data register that inserts the state change data output from this priority detection section. The state change data input from the system is compared with the state change data accumulated by itself, and the state change data with the highest priority is inserted into the received state change data frame and monitored A remote monitoring method characterized by transmitting pulse signals to the next station.