JPS6145659A - Remote supervisory and controlling equipment - Google Patents

Abstract

PURPOSE:To improve the mounting space by providing a signal transmission modulator in which an optional carrier frequency and transmission level are set programmably by using a signal from a transmitter to the transmitter. CONSTITUTION:The titled equipment consists of a controller 1 outputting control information and a transmitter 2 transmitting the control information inputting the control information and transmitting it to plural receivers 51-5n. Then the control signal is transmitted to one of the receivers 51-5n by providing to the transmitter 2, a transmitter 3 applying transmission processing to the control information, a signal transmission modulator 4 having a control circuit modulating the said transmission signal into an optional carrier frequency in matching with a transmission switching signal 8A from the transmitter 3 and setting programmably the transmission level, and a switching connection circuit 7A connecting the modulated transmission signal to optional transmission lines L1A-LnA in matching with the transmission switching signal 8A from the transmitter 3.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a remote monitoring and control device, particularly a remote monitoring and control device that has a transmitting device or a receiving device that performs transmission processing for transmitting and receiving various information over a plurality of transmission paths. It is related to the device.

[Technical Background of the Invention] FIGS. 2 and 3 are configuration diagrams showing control and control transmission functions of a conventional remote monitoring and control device. FIG. 2 shows a control device 1 that outputs control information, and a transmitter 2 that inputs control information and transmits the control information to a plurality of receiving devices 51 to 5n.
It consists of The transmitter 2 includes a transmitter-3 that converts input information into a transmitter signal, and a receiver 51 that receives the transmitter signal from the transmitter 3 and is connected via a plurality of transmission paths L1 to LA. .about.5n.

FIG. 3 shows the transmitting device 2 shown in FIG. 2 in which one signal transmission modulator 4 is provided and a plurality of amplifiers 61 to 6n corresponding to a plurality of receiving devices 51 to 5n are provided.

In both FIGS. 2 and 3, the output of one transmitter 3 is modulated by a signal transmission modulator, and control information is transmitted to a plurality of transmission lines L1 to LA at the same time.

FIG. 4 is a diagram showing the internal configuration of the signal transmission modulator, in which an input section a receives the transmission signal A from the transmitter 3,
An oscillation section that oscillates a carrier frequency signal with the output of the input section a as a reference at a certain center frequency, an amplification section C that performs amplification for transmitting the carrier frequency signal, and a frequency determined by the usage conditions of the transmission path. It is usually comprised of a level setting section d for setting the transmission signal level.

In FIG. 2, the reason for having a plurality of signal transmission modulators 41 to 4n is because the transmission distance from the transmitting device 2 to each of the receiving devices 51 to 5n and the usage conditions of the transmission paths are individually different, so the carrier frequency and transmission level are different. This is because there are many cases where the distance is far away. In addition, in FIG. 3, even if the carrier frequency to the transmission lines L1 to L1 is the same, the transmission level differs depending on the transmission distance and the usage status of the transmission line, so multiple amplifiers 61 to 6n are provided to set the optimum transmission level. are carried out individually.

[Problems in the Background Art] As described above, the transmitting device 2 of the conventional remote monitoring and control device has a plurality of receiving devices 51 to 5n by providing a plurality of signal transmission modulators 4 or a plurality of amplifiers 61 to 6n. The carrier frequency and transmission level for each are determined and the information is transmitted, but a plurality of signal transmission modulators 41 to 4n
and amplifiers 61 to 6n, there are drawbacks such as a relatively high price, a reduction in mounting space, and a reduction in maintainability due to the necessity of several types of carrier frequencies and transmission levels.

[Object of the Invention] The present invention has been made with the aim of solving the above problems, and provides a remote monitoring and control device that can programmably control carrier frequency and transmission level switching using a transmission switching signal from a transmitter. is intended to provide. [Summary of the Invention] The present invention uses a signal transmission modulator having a programmable circuit to programmably set the carrier frequency and transmission level for one receiver of a plurality of receivers in a transmitter. It is something. FIG. 5 is a diagram showing the internal configuration of the signal transmission modulator according to the present invention.
The oscillating unit and the level setting unit d are capable of changing the carrier frequency value and the transmission level value to arbitrary values, and have a control circuit e for programmably issuing the changing command.

[Embodiment of the Invention] FIG. 1 is a block diagram showing a control transmission function of an embodiment of a remote monitoring and control device according to the present invention. In FIG. 1, a transmitter 3, which is a device consisting of a transmitter @2 that outputs control information, modulates the transmitted transmission signal to an arbitrary carrier frequency corresponding to the transmission switching signal 8A from the transmitter 3. A signal transmission modulator 4 having a control circuit that programmably performs modulation processing and transmission level setting, and a signal transmission modulator 4 that transfers the modulated transmission transmission signal to an arbitrary transmission line 11 corresponding to the transmission switching signal 8^ from the transmitter 3. By providing a switching connection circuit 7^ that connects to ~La, a plurality of receivers Wi51~5
Control information can be sent to one of n.

Multiple signal transmission demodulator elements are required even when a single receiver performs reception and transmission processing for multiple transmission paths, but by providing a signal transmission demodulator with a programmable control circuit, it is possible to The same effect as the control transmission function configuration diagram shown in the figure can be obtained. An embodiment using a signal transmission demodulator having a programmable control circuit will be described with reference to FIG.

FIG. 6 shows a receiver 10 that performs reception and transmission processing of various information, and a reception switching signal 8B from the receiver 10 to programmably set arbitrary carrier frequencies and optimal reception levels from a plurality of transmitters 121 to 12n. This is a receiving device 9B that includes a signal transmission demodulator 11 having a control circuit and a switching connection circuit 7B that arbitrarily connects to one of a plurality of transmission lines L1II to 171B according to a reception switching signal. With such a configuration, various information transmitted from the plurality of transmitting devices 121 to 12n can be controlled to an arbitrary carrier frequency and optimal reception level by the reception switching signal 8B from the receiver 10, and reception and transmission processing can be performed. This is a remote monitoring and control device that can be used as a receiving device.

Furthermore, in FIG. 7, in order to perform transmission/reception transmission processing of various information with a plurality of controlled station remote monitoring and control devices, FIGS.
1 is an embodiment of a control center remote monitoring and control device including both of the embodiments shown in the figure. FIG. 7 shows that a plurality of controlled station remote monitoring and control devices R1 to R11 having transmitting, receiving and transmitting functions and one control station remote monitoring and controlling device M are configured in accordance with the embodiments of FIGS. 5 and 6. configured. The operation and effects of this embodiment are as explained in FIGS. 5 and 6.

[Effects of the Invention] As explained above, according to the present invention, there is provided a signal transmission modulator that can programmably set any carrier frequency and transmission level using signals from a transmitter, and can be arbitrarily connected to a plurality of transmission paths. By having one set of each switching connection circuit, it is possible to provide a remote monitoring and control device having a transmitting device that not only reduces the price of the device, but also improves mounting space, reliability, and maintainability. I can do it.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of a remote monitoring and control device according to the present invention, FIGS. 2 and 3 are configuration diagrams of a conventional remote monitoring and control device without the control transmission function, and FIG. 4 is a diagram of a conventional remote monitoring and control device. FIG. 5 is a diagram showing the internal configuration of the signal transmission modulator used in the present invention. FIGS. 6 and 7 are other embodiments of the remote monitoring Ha device according to the present invention. FIG. 1... Control device B 2... Transmitting device 3.
...Transmitter 4.41~4n...Signal transmission modulator 51~5n...
- Receiving device, L1A to IJ, LIB to... Transmission lines 61 to 6n... Amplifiers 7A, 7B... Switching connection circuit 8A... Transmission switching signal 8B... Reception switching signal 9B. ...Receiving device 10...Receiver 11...Signal transmission demodulator 121-12n...Transmitting device M...Control station remote monitoring and control device R1-h...Controlled station remote monitoring and control device ( 7317)
Agent Patent attorney Kensuke Norichika (1 other person) Child 1 Illustration Bag 7 Illustration M

Claims (1)

[Claims] In a remote monitoring and control device where a control device and multiple controlled plant devices located in remote locations mutually transmit control commands and information, the control device side is equipped with one transmitter and one receiver, each of which can be changed programmably. It connects to multiple controlled station devices via modulators and demodulators that can be used, and when transmitting control commands from the control center, adjusts the modulator for each controlled station and transmits the carrier frequency and transmission level value. In addition, when transmitting information from the controlled station side, the demodulator on the control device side is adjusted and received according to each carrier frequency and transmission level value of the controlled station side. A remote monitoring and control device.