JPH0235864A - Remote supervisory control system - Google Patents

Abstract

PURPOSE:To obtain an inexpensive remote supervisory control system in a simple constitution by providing a telephone interface terminal device to convert data exchanged through a telephone line and a signal line. CONSTITUTION:A telephone interface terminal device 9 is equipped with a signal exchanging circuit 26 to exchange the data through a telephone line 15 from the telephone exchange network Y of NTT (Nippon Telegraph and Telephone Corporation) and a telephone line 17 from a private exchange (PBX), and a signal conversion transmitting circuit 27 to multiplex-transmit the data by time-sharing through telephone lines 15 and 17 and a signal line 4 at the section of a central control unit 1. Thus, when the load of the private line is controlled from the telephone set of a trunk line or from the telephone set of an extension, a telephone interface terminal device 9 is called, a code number registered beforehand is sent, and then, the control data of the load to be controlled are transmitted.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a remote monitoring and control system.

[Prior Art] Conventionally, in this type of remote monitoring and control system, a central control device and a plurality of terminal devices each having a unique address are connected through a pair of signal lines, and each terminal device is accessed from the central control device. There was one in which data was transmitted via time division multiplexing. On the other hand, as a remote control system for remotely controlling a load via a telephone line, there is a system in which load control data and a load operation confirmation signal are transmitted via a telephone line to remotely control the load.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, there is a system that remotely controls distributed loads using signal lines wired within the premises, and a system that remotely controls loads distributed from a remote location via a telephone line. Since the remote control system and the remote control system were independent, each load required a terminal device and wiring to be able to be controlled by both systems, posing the problem of complicating the control system.

The present invention has been made in view of the above points, and its purpose is to simplify the configuration and reduce costs by making it possible to transmit data transmitted via a telephone line via a signal line. Our goal is to provide inexpensive remote monitoring and control systems.

[Means for Solving the Problems] The remote monitoring and control system of the present invention connects a central control device and a plurality of terminal devices having unique addresses with a pair of signal lines, and allows each terminal device to be accessed from the central control device. In a remote monitoring and control system in which data is time-division multiplexed and transmitted via a telephone line, data is time-division multiplexed between a signal transmitting/receiving circuit that transmits and receives data via a telephone line and a central control unit via the signal line. The telephone interface terminal is equipped with a signal conversion and transmission circuit that performs transmission and conversion of data sent and received via a telephone line and a signal line.

[Function] The present invention is configured as described above, and is used in a remote monitoring and control system in which data is time-division multiplexed using a dedicated signal line. It is equipped with a telephone interface terminal that performs time-division multiplex transmission of data to and from a central control unit via telephone lines and converts data sent and received via telephone lines and signal lines. By making it possible to transmit data transmitted via signal lines, it has become possible to provide a remote monitoring and control system with a simple configuration and low cost.

[Embodiment] FIG. 1 shows an embodiment of the present invention, in which a central control device 1
and a plurality of monitoring terminals 2 with unique addresses set,
A control terminal 3, a wireless relay terminal 7, a pattern setting terminal 8, and a telephone interface terminal 9 are connected by a pair of signal lines 4, and signals are sent from the central control device 1 to the signal line 4. The transmission signal Vs is shown in Fig. 2(a).
As shown in the figure, a start pulse signal ST indicates the start of signal transmission, a mode data signal MD indicates the signal mode, an address data signal AD transmitting 8-bit address data for calling the terminal device 2, 3.7 to 9, and a load L1. A bipolar (±24V) signal consisting of a control data signal CD that transmits control data for controlling ~L4, a checksum data signal C8, and a return standby signal WT that sets a return period from terminals 2.3.7 to 9. It is a time division multiplexed signal, and data is transmitted using pulse width modulation. When the address data of the transmission signal Vs received via the signal line 4 and its own unique address data match, each terminal device 2, 3゜7-9 takes in the control data of the transmission signal Vs, and The monitoring data signal is returned as a current mode signal (a signal sent by short-circuiting the signal lines 4 via an appropriate low impedance) in synchronization with the return standby signal WT of the signal Vs. Further, the central control device 1 includes a dummy signal transmitting means for constantly transmitting a dummy transmission signal in which the mode data signal MD is in a dummy mode;
When an interrupt signal Vi as shown in FIG. 2(b) is received from any of the monitoring terminals 2, wireless relay terminals 7, pattern setting terminals 8, or telephone interface terminals 9, Interrupt generation terminal 2
．． Interrupt processing means is provided for detecting signals 7 to 9 and accessing the terminals 2, 7 to 9 to return monitoring data. The central control device 1 also uses the monitoring data sent back to the central control device 1 from the monitoring terminal 2 or the wireless relay terminal 7, the pattern setting terminal 8, and the telephone interface terminal 9 as described above. Then, control data is created to be transmitted to the control terminal device 3 that controls the corresponding loads L1 to L1, and the control data is time-division multiplex transmitted to the control terminal device 3 via the signal line 4 to control the load. It is designed to control L1 to L.

The wireless relay terminal 7 includes an optical wireless transmitter 10,
Optical wireless receiver 11 and wireless signal line 12
This is a terminal device that relays data in an optical wireless system consisting of a wireless optical transmitter 10, which receives an optical signal transmitted from an optical wireless transmitter 10 with an optical wireless receiver 11, and transmits the received data via a wireless signal line 12. At the same time as the data is received, the data is transferred to the central control unit 1. Further, the pattern setting terminal device 8 is a terminal device that transfers pattern control data input from the data input section 8a to the central control device 1. The monitoring terminal 2 and the control terminal 3 installed in the distribution board 6 or relay control panel 6a have the dimensions agreed upon in the distribution board, and their control output enables the remote control relay for load control. (A latching relay that can be turned on and off using a hand switch) 5 is controlled. Also, the third
The figure shows an example of the distribution of personnel, and the signal line 4 is wired by sending wiring to the monitoring terminal 2 of the switch S placed on each floor, and the power line 17 is wired to each load. There is. Further, an external telephone line 15 wired through NTT's switching network Y is input to a private branch exchange (PBX) 16, and is connected to an extension telephone X and a telephone interface terminal 9 via an extension telephone line 17. ing.

By the way, the telephone interface terminal 9 according to the present invention
As shown in FIG. 4, the signal transmitting/receiving circuit 26 transmits and receives data via the telephone line 15 from the NTT telephone exchange 1lIY and the telephone line 17 (i.e., outside line and extension line) from the private branch exchange (PBX); A signal conversion and transmission circuit 2 that performs time-division multiplex transmission of data to and from the central control unit 1 via the signal line 4 and converts data transmitted and received via the telephone line 15, 17 and the signal line 4.
7. Here, the signal transmitting and receiving circuit 2
6 is formed by an incoming call detection section 20, a DC connection section 21, an impedance matching section 22, a signal reception section 23, a response signal generation section 24, and a signal processing section 25,
When a pre-registered PIN number is transmitted automatically in response to a call from a general home telephone fix, public telephone X2 or extension telephone X, the subsequently transmitted load control data signal is received. The control side telephones XI, X2. It is designed to be returned to X:l.

Further, the signal receiving section 23 of the signal transmitting/receiving circuit 26 includes a PB
PB signal detection means for receiving as a double signal data signal;
A voice recognition means for recognizing the speaker's voice (for example, numbers) transmitted from the control side is provided, and the response signal generating section 24 is provided with a voice response means for generating a response voice by voice synthesis. ing. Note that the response signal generating section 24 may be provided with voice reply means for transmitting load operation confirmation data to the telephone line 17 in the form of a voice signal (oscillation sound signal of a predetermined frequency).

FIG. 5 shows an example of a wall-embedded telephone interface terminal 9, in which printed circuit boards 30a and 30b on which terminal circuits are mounted are housed in a case 30 consisting of a body 31a and a cover 31b. 31
is the standardized module dimension of the wiring device, and a fitting protrusion 33 that fits into the wiring device mounting frame 32 for attaching the wiring device to the embedded box is provided on the side surface of the cover 31b. Connect the mating protrusion 33 to the wiring device mounting frame 3
It can be fitted into the fitting portion 34 of No. 2 and embedded.

FIG. 6 shows an example of a JIS rack built-in type telephone interface terminal 9, in which the terminal circuit is housed in a JIS rack built-in type case 35, a power indicator lamp 36 is provided on the front of the case 35, and the case 35 is equipped with a power indicator lamp 36. 35
A signal line connection terminal 37 to which the signal line 4 is connected, a telephone line connection terminal 38, and a password setting switch section 39 are provided on the back surface of the device.

FIG. 7 shows a telephone interface terminal 9 built into a distribution board, in which a case 41 housing printed circuit boards 30a and 30b on which terminal circuits are mounted is attached to a body 41a.
and a cover 41b, and the case 41 is set to the dimensions agreed upon on the distribution board, thereby making it a distribution board arrangement type.

The power line connection terminal 42, the signal line connection terminal 43 to which the signal line 4 is connected, the telephone line connection terminal 44, and the password setting switch section 44 are provided on the upper surface of the case 45.

The operation of the embodiment will be described below. Currently, in a remote monitoring and control system in which data is time-division multiplexed using a dedicated signal 114, the telephone line 15.17
It transmits and receives data via the telephone lines 15 and 17 and the signal line 4, and performs time-division multiplex transmission of data to and from the central control unit 1 via the signal line 4, and converts the data transmitted and received via the telephone lines 15, 17 and the signal line 4. It is equipped with a telephone interface terminal 9 and enables data transmitted via the telephone line 15, 17 to be transmitted via the signal line 4.
Compared to the conventional example in which each load is provided with a telephone terminal device and a telephone line is wired, it is now possible to provide a remote monitoring and control system with a simpler configuration and lower cost.

That is, when controlling the load on the premises from the outside line t-filling machine X+, X2 or the extension telephone X, after calling the telephone interface terminal 9 and sending the pre-registered password, It is sufficient to transmit the control data (load number and on/off data) of the load to be controlled, and when the signal transmission/reception circuit 26 finds a match in the password, it transmits the received control data to the signal conversion/transmission 11i2I2827. It looks like this. The signal conversion and transmission circuit 27 converts the data sent from the signal transmission and reception circuit 25 into data in a predetermined format for time-division multiplex transmission with the central control device 1, and returns it to the central control device 1 via the signal 114 ( The central control unit 1 receives the control data from the telephone interface terminal 9 (returning the monitoring data by the above-mentioned interrupt processing), and controls a predetermined load via the control terminal 3 based on this control data. At the same time, monitoring data indicating the operating state of the load is sent back from the control terminal 3.

Next, the central control device 1 transmits the monitoring data returned from the control terminal 3 to the telephone interface terminal 9 via the signal line 4. A signal indicating the operating state of the load transmitted from the device 1 is received by the signal conversion and transmission circuit 27, converted into predetermined data, and sent to the signal transmission and reception circuit 26.

The signal transmitting/receiving circuit 26 generates a voice signal based on data indicating the operating state of the load, and transmits the voice signal to the control side telephone XI.

The operating status of the load is sent back to X2 and X3.

[Effects of the Invention] The present invention is configured as described above, and is capable of transmitting and receiving data via a telephone line in a remote monitoring and control system in which data is time-division multiplexed using a dedicated signal line. It is equipped with a telephone interface terminal that performs time-division multiplex transmission of data to and from a central control unit via signal lines, and converts data sent and received via telephone lines and signal lines. Since the data transmitted through the signal line can be transmitted through the signal line,
Compared to the conventional example in which each load is provided with a telephone terminal device and a telephone line is wired, it is possible to provide a remote monitoring and control system with a simpler configuration and lower cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of the same operation, and FIG. 3 is a schematic configuration diagram showing an example of the same arrangement.
Fig. 4 is a block circuit diagram of the main parts of the same as above, Fig. 5 is an exploded perspective view of the main parts of the same as above, Figs. FIG. 1 is a central control unit, 2 is a monitoring terminal, 3 is a control terminal, 4 is a signal line, 9 is a telephone interface terminal, 2
6 is a signal transmission/reception circuit, and 27 is a signal conversion/transmission circuit.

Claims (6)

[Claims] (1) Remote monitoring control in which a central control unit and multiple terminals with unique addresses are connected via a pair of signal lines, and data is time-division multiplexed by accessing each terminal from the central control unit. In the system, data is time-division multiplexed between a signal transmitting/receiving circuit that transmits and receives data via a telephone line and a central control unit via the signal line, and data is transmitted and received via the telephone line and the signal line. 1. A remote monitoring and control system comprising a telephone interface terminal equipped with a signal conversion and transmission circuit that converts data. (2) The remote monitoring and control system according to claim 1, wherein the signal transmission/reception circuit is provided with voice recognition means and voice response means. (3) The remote monitoring and control system according to claim 1, wherein the signal transmission/reception circuit is provided with voice reply means for transmitting the load operation confirmation data to the telephone line in the form of voice signals. (4) Claim 1 characterized in that the terminal circuit of the telephone interface terminal is housed in a wall-embedded case.
Remote monitoring and control system as described. (5) JI the terminal circuit of the telephone interface terminal
The remote monitoring and control system according to claim 1, wherein the remote monitoring and control system is housed in an S-rack built-in case. (6) The remote monitoring and control system according to claim 1, wherein the terminal circuit of the telephone interface terminal is housed in a distribution board type case.