JPS581591B2 - data collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a 1:N type data collection device that cyclically connects a plurality of monitored stations to one monitoring station and collects data from each monitored station to the monitoring station. There is a 1:N data collection device that does this.

This type of monitored station 10, monitoring station 100, and monitoring station have the configurations shown in FIGS. 1 and 2, respectively.

In other words, when the monitored station makes a call, the call call switch 1
By pressing 1, the call signal is stored in the memory circuit 12, and this stored signal is converted into a code signal by the transmission control circuit 14 together with the input signal without mixing with the input control circuit 13, The signal is converted into a transmission signal by the modulator 15 and transmitted to the monitoring station through the interface circuit 16.

A call signal from the monitoring station 100 is confirmed by a call call signal detector 17, and then a changeover switch 19 is turned to the telephone 18 side to make a call.

The corresponding monitoring station receives call signals from a plurality of monitoring stations through each interface circuit 101 to the input side of the station selection circuit 102.

This station selection circuit 102 is controlled by a reception control circuit 104, calls a plurality of monitored stations cyclically, and the called call calling signal is demodulated by a demodulator 103, detected by a reception control circuit 104, and outputted to the output control circuit. 105, the called station to be monitored is displayed on the display circuit 106.

In addition, the monitoring station 4 sends a message to the telephone line switching circuit 1 from the telephone line switching control circuit 107 to the called monitored station.
08 and sends a call call signal to the calling station to the call call signal oscillator side 109.
After this transmission, selector switch 1 is sent.
10 to the telephone 111 side to make a call.

The Ike signal passes through a station selection circuit 102 controlled by a reception control circuit 104, is code-converted by a demodulator 103, and is sent to a reception control circuit 104 and an output control circuit 105.
0 In such a 12N type data collection device, the call signal from the monitored station is transmitted as part of the signal, so the detection at the monitoring station is not transmitted to the monitored station. Station selection circuit 10
2 is connected and a signal is received. For example, in a system where polling synchronization is once an hour, there is a drawback that only the polling time can be detected.

In addition, even when polling is carried out in sequence, the station cannot be detected until it has its turn.

SUMMARY OF THE INVENTION An object of the present invention is to provide a data collection device that eliminates the above drawbacks by allowing a monitoring station to detect a call signal from a monitored station regardless of polling time and data collection switching order.

To achieve this purpose, the monitored station side is equipped with a switching circuit that switches and connects a call signal oscillator, an input sending data, and the output of the call signal oscillator to a transmission line;
The monitoring station side is equipped with a call ring signal switching control circuit, and a call ring signal switching circuit that connects each monitored station to a call ring signal detector under the control of the call ring signal switching control circuit. When a station wants to talk to the monitoring station, it flips the changeover switch of the monitored station to the output side of the call signal oscillator and sends out a call signal indicating that it wants to talk to the transmission line.

On the monitoring station side, a call signal switching circuit controlled by the call call signal switching control circuit connects each monitored station one after another to the input side of the call signal detector at a higher speed than the station selection circuit. , thereby detecting the monitored station from which the call signal has been sent.

Because the normally open contact of the station selection circuit or the output side of multiple monitored stations is scanned at a higher speed than the scanning speed of the station selection circuit without going through this normally open contact, the monitored station to which you want to make a call is You will be able to talk to the monitoring station immediately without waiting.

An embodiment of the present invention will be described below with reference to the drawings.

Circuits and structures having the same functions as those of the conventional apparatus shown in FIGS. 1 and 2 are designated by the same reference numerals, and their explanations will be omitted.

FIG. 3 shows a circuit configuration of a monitored station according to the present invention, which has a call calling means different from that of the monitored station shown in FIG.

A call signal oscillator 20 and a changeover switch 21 are provided, and the output of the call signal oscillator 20 is transferred to the ink interface 16 by the first switch 21 without inputting the call signal, which is the output of the call signal oscillator 20, to the input control circuit. This is what you input.

That is, a first switching circuit 21 is added, the normally closed contact is connected to the output of the modulator 15 and the input of the call signal detection circuit 17 that detects the call signal from the monitoring station, and the normal contact is connected to the output of the call signal oscillator 20. On the output side, the first switching circuit 21 is connected to the normally closed contact of the second changeover switch 19, the normally open contact is connected to the telephone 18, and the output side is connected to the input side of the ink switch 16 of the transmitter. Connect the switching circuit 19.

With such a circuit configuration, the call signal from the monitoring station is detected by the call signal detection circuit 17 via the interface 16, the second switching circuit 19, and the first switching circuit 21, and after detection, the call signal from the monitoring station is detected by the call signal detection circuit 17. 19 to the normally open contact side and telephone 1
8 to the transmission line, and will be ready for communication later.

The input data of the input control circuit 13 is the transmission control circuit 14,
The signal is transmitted through the modulator 15, the first switching circuit 21, the second switching circuit 19, and the interface 16 to a transmission line connected to a monitoring station.

When making a call with the monitoring station, the output side of the first switching circuit 21 is turned to the normally open contact side, and the output of the call signal oscillator 20 is passed through the second switching circuit 19 and the ink face 16 to the transmission line. After that, the second switching circuit 19 is turned to the normally open contact side, and the telephone 18 is connected to the transmission line to maintain a state in which a call can be made.

FIG. 4 shows a circuit configuration of a monitoring station according to the present invention, which includes call signal detection means different from that of the monitoring station shown in FIG.

That is, without detecting the call signal sent from the monitored station in the reception control circuit 104, each transmission path is sequentially scanned and the output of the monitored station is detected by the corresponding call call signal detector or switching scan. By connecting to the input side of one call signal detector, it is possible to make a call or detect the monitored station regardless of the scanning of the station selection circuit, depending on the presence or absence of the output of the call signal detector. Enables communication with the monitoring station.

For this reason, in the figure, a changeover switch 108 having a normally closed contact and a normally open contact is provided in the communication line switching circuit 108 that receives switching control from the communication line switching control circuit 107, corresponding to each monitored station, and the output terminal is connected to the station to be monitored. A normally open fixed contact is connected to the output side of the selection circuit 102 for switching between the call signal oscillator 109 and the telephone 111. A normally closed fixed contact is connected to the output side of the switching circuit 110 by the call signal switching control circuit 107. The signals are respectively connected to the input sides of the call signal switching circuit 112 which is subjected to cyclic switching control at a higher speed than the scanning speed of .

The output side of this call signal switching circuit 112 is connected to a common point, and this common point is connected to the input side of the call call signal detector 113.

A calling station detecting circuit 115, which inputs the output of the calling signal detector 113 and the monitoring station selection signal output from the calling signal switching control circuit 114, calculates the logical product of these inputs and selects the monitoring station. The monitored station with which the user wishes to communicate is displayed on the display device 116.

Next, the operation of the monitoring station configured as described above will be explained.

When the reception control circuit 104 finishes receiving data from a certain monitored station, the contacts of the station selection circuit 102 are cyclically closed so that the next monitored station is connected to the input side of the demodulator 103. The outputs of the monitored stations are sequentially input to the demodulator 103 to receive demodulated data.

Assume that in such a reception state, call signals are output from a plurality of monitored stations.

A call signal is input to the input terminal of the station selection circuit 102 via the interface 101 corresponding to each monitored station.

Each call signal is switched through a closed fixed contact of the station selection circuit 102 and a closed fixed contact of the call line switching circuit 108 of the call line switching control circuit 107, respectively, corresponding to the monitored station. Appears at the input of circuit 112.

This call ringing signal switching circuit 112 is configured to cyclically scan each input point at a higher speed and asynchronously than the station selection circuit 102 by a call ringing signal switching control circuit 114. When the ringing signal is selected by the ringing signal switching control circuit 114, it appears at the input side of the ringing signal detector 113, where the ringing signal is detected.

A logical AND operation is performed between the station selection signal outputted from the call ringing signal switching control circuit 114 and the output of the call ringing signal detector 113, and when the result is established, the corresponding indicator lamp is lit and a call request is made. The location of the monitored station is displayed, and the calling station detection circuit 115 displays on the display unit 116 all of the monitored stations to which calls have been applied.

The monitoring person knows which station to be monitored from the lighting of the display lamp, and selects the monitored station with which he/she wants to make a call using the call line switching control circuit 107.
Set to .

As a result, the telephone line switching control circuit 107 controls the telephone line switching circuit 108 to transmit the output from the telephone call signal oscillator 109 to the set monitored station.

After that, the second switching circuit and the first switching circuit are turned to the telephone side at the monitored station side and the monitoring station side, and a telephone conversation is performed.

In this way, the station selection circuit cyclically scans each monitored station one after the other, and even while data from each monitored station is being received by the reception control circuit, the location of the monitored station to which a call request has been made is known. It is detected by the lighting of the indicator light, and the output of the call signal oscillator is sent to the monitored station to which the call request has been made, and then the switching circuit is switched to initiate the call.

In one embodiment of the present invention, the call paging signal detector is described as being connected to the output side of the call paging signal switching circuit, but the present invention is not limited to this. The same effect can be obtained even if the input side is connected to a station selection circuit or a telephone line switching circuit.

Further, in one embodiment of the present invention, the call signal switching circuit is described as being provided at the rear of the call line switching circuit, but it may be provided on the input side of the call line switching circuit depending on the weight or priority of data and calls. 0 As described above, the present invention configures a monitored station so that it can directly send a call signal from a call signal oscillator to a transmission line by operating a monitored station switching circuit, and controls the call call signal switching circuit and call signal switching control. The monitoring station is configured so that the signals sent from each transmission path are guided to the call signal detector at a speed higher than the scanning speed of the station selection circuit, thereby reducing polling time and data collection switching. It is possible to detect calls from monitored stations regardless of the order,
Communication between the monitoring station and each monitored station was always possible.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a block configuration of a monitored station of a conventional data collection device, FIG. 2 is a diagram showing a block configuration of a monitoring station of a conventional data collection device, and FIGS. 3 and 4 are diagrams showing a block configuration of a monitoring station of a conventional data collection device. FIG. 2 is a block diagram showing the configuration of a monitored station and a monitoring station of the data collection device. 13...Input control circuit, 14...Transmission control circuit, 17...Telephone call signal detection circuit, 1
9.21...Second/first switching circuit, 20...
...Call call signal oscillator, 18...Telephone,
102... Station selection circuit, 107... Call line switching control circuit, 108... Call line switching circuit, 109... Call calling signal oscillator, 111
...Telephone, 112... Call call signal switching circuit, 113... Call call signal detection circuit,
114...Telephone call signal switching control circuit, 115
・・・・・・Call calling station detection circuit.

Claims (1)

[Claims] 1 Each of a plurality of monitored stations is cyclically coupled to one monitoring station via a transmission path, and the data of the plurality of monitored stations is collected in the monitoring station, and data between the monitoring station and the calling monitored station is In the apparatus for making telephone calls, the monitored station is equipped with a telephone call signal oscillator and a switching circuit for selectively outputting one of the telephone call signal and the transmission data to a transmission line, and the monitoring station is equipped with a plurality of monitored stations. a station selective circuit that cyclically selects and outputs data of the selected monitored station;
A call ringing signal detector detects a call ringing signal, and a plurality of monitored stations are connected asynchronously to the call ringing signal detector at a higher speed than the cycle of the station selection circuit, and the monitored station that has issued the call ringing signal is detected. A data collection device comprising a calling station detection circuit for displaying a call.