JPH07186961A - Data adding system data relay transmitter - Google Patents

Abstract

PURPOSE:To shorten a span of transmitting time, and save time for setting a position as well as to lengthen a transmitting distance. CONSTITUTION:Plural pieces of job-site units No.1 to (n) are connected to a display 2 in series, each job-site unit relays those of transmitting data out of a previous stage to the next one and amplifies each of them and, after this relay is over, its own data are transmitted, and the whole job-site data is transmitted to the display 2 and they are made so as to be displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission device for centrally monitoring the operating states of railway field equipment field equipment.

[0002]

2. Description of the Related Art A conventional operation state centralized monitoring apparatus for each field equipment of signal equipment will be described with reference to FIGS. FIG. 7 is a diagram showing a configuration of a conventional centralized monitoring device, and FIG. 8 is a diagram showing a time series chart. The L ₁ line connected to the station device is 01, 02 ... 3F (hexadecimal display) field device, and the L ₂ line is 41, 42 ... 7F field device up to 10 km each, and 10 km 10K for the above
A relay device is provided at the m point to enable further 10 km transmission, and up to 60 field devices can be connected to each line.

Next, the operation will be described with reference to FIG.
As shown in, the station device sequentially transmits the position selection signal to each field device, and first transmits the 01 position call signal to call the 01 field device. Upon receiving the 01 position calling signal, the field device at position 01 returns eight pieces of information to the station device. When the station device receives the reply of 01 position, it calls the field device of 02 position.
Thereafter, the same operation is repeated, such as calling and replying to the 01 position one after another, and when the 3F position of the L1 line is reached, the same operation is repeated from 41 to 7F of the L2 line. In this way, the L1 and L2 lines are alternately called and returned repeatedly to perform centralized monitoring.

[0004]

By the way, FIG. 8 (b)
As shown in, the call signal and the reply signal are each 2
0msec width, 40m between call signal and reply signal
sec, and the time required to transmit 1 position 8 information is 100 msec. Therefore, assuming that the maximum number of field devices installed on the station device is 120, the time required for data transmission of all field devices is 120 × 100 msec =
It is 12 seconds, and the number of information is 120 × 8 = 960.
Therefore, it takes 12 ÷ 960 to transmit one information.
= 12.5 msec. As described above, in the conventional centralized monitoring device, since it calls the position of each field device, it takes a lot of time to transmit one information,
It was also difficult to lengthen the transmission distance.

The present invention is for solving the above-mentioned problems, and shortens the transmission time, saves the trouble of setting the position,
It is another object of the present invention to provide a data addition type data relay transmission device capable of increasing the transmission distance.

[0006]

In the data addition type data relay transmission device of the present invention, a plurality of field devices are connected in series to a display device, and each field device relays and amplifies the transmission data from the previous stage to the next stage. At the same time, it is characterized in that after the relay is completed, its own data is transmitted, and all the site data is transmitted to the display device for display. Further, according to the present invention, each field device has a relay signal detection circuit, a short pulse and long pulse creation circuit for the detected relay signal, an information input long / short pulse creation circuit, a relay long / short pulse creation circuit and information input. And an adder circuit for adding the outputs of the long / short pulse generating circuit for use. In addition, according to the present invention, each field device is provided with a timer activated by a relay signal, and when the relay signal is interrupted for a predetermined time, the information input long / short pulse generation time is driven to generate and transmit its own data. Characterize. Further, according to the present invention, in the display device, the shift registers having the number of bits corresponding to the number of information transmitted by the field device are connected in series by the number corresponding to the number of field devices, and LED display is performed corresponding to the bit of each shift register. It is characterized by having done.

[0007]

According to the present invention, the data is transmitted from each field equipment of the signal equipment, the data is relayed and amplified by the next field equipment, and after the relay is completed, the own data is transmitted. Therefore, it is necessary to set the position. , Even if the transmission distance is long, the relay distance is relatively short and there is no limit to the transmission distance.
It is possible to reduce the transmission time.

[0008]

1 is a diagram showing the configuration of a data addition type data relay transmission device of the present invention, and FIG. 2 is a diagram showing a data transmission time chart. In the figure, 1 is a field device, and 2 is a data addition type data relay transmission display device. Each field device is adapted to transmit 8 information. Now, when 8 pieces of information are transmitted from the Non field equipment, the No 5 field equipment relays and amplifies and transmits the 8 pieces of information sent from Non, and when the transmission is completed, it transmits 8 pieces of information of the No 5 field apparatus itself. .
The No. 4 field device relays and amplifies 16 pieces of information of Non + No. 5 and transmits it to the No. 3 field device. When this transmission is completed, it transmits 8 pieces of information of the No. 3 field device itself. Thereafter, the information is sequentially relayed, eight pieces of own data are added and transmitted to the display device, and the display device 2 displays all the information.

In FIG. 2, the last signal of the eight pieces of information of the field device of Non is the end signal, and in reality, it is 7
Information is being transferred. Input 7 information contents "0"
The pulse width is changed to 1 ms width for 1 ms and 0.5 ms width for input "1", and the end signal has a wide pulse width such as 2 ms width. The field device of No. 5 relays the information from Non, converts the pulse width of the end signal into the same 1 ms width as the input “0” to make a section signal, and further transmits its own seven pieces of information and the end signal. After that, the same relaying and transmission of its own signal are sequentially repeated.

Now, assuming that it takes 0.036 seconds to transmit 1 position 7 information and 120 on-site devices are 120 × 0.036 seconds = 4.32 seconds, the number of information is 12
0 × 7 = 840, and the time required for one information transmission is 4.32 ÷ 840 = 5.14 msec, which can reduce the transmission time to half compared with the conventional centralized monitoring device, and double the time. Information can be transmitted. Further, it is possible to save time and labor for setting positions, and in the conventional centralized monitoring device, all information is displayed on the station device only when there is an input. Therefore, even if the transmission distance is long, the relay distance is relatively short and the transmission distance can be lengthened.

FIG. 3 is a diagram showing a circuit configuration of the field device and the display device in FIG. 1, and FIG. 4 is a diagram showing a transmission signal waveform. In the figure, 10 is an amplifier, 11 is a detector, 12 is a timer, 13 is an information input long / short pulse creation circuit, 14 is an input circuit, 15 is a relay short pulse creation circuit, 16 is a relay long pulse creation circuit, 17 Is an OR circuit, 18 is a power amplification circuit, 19 is a clock generator, 20 is a power supply, 21 is a communication cable, 22 is an amplifier, 23 is a detector, 24 is an 8-bit shift register + latch circuit, 25 is a clock generation circuit, 26 is a power supply.

The field device 1 in FIG. 3 shows one at a specific position. The relay signal from the field device at the preceding stage is amplified by the amplifier 10, and is transmitted via the detector 11 to the relay short pulse generation circuit 15, Relay long pulse generation circuit 16
At, the signals corresponding to the input "0" and the input "1" are created respectively. The timer 12 is activated by the relay signal from the amplifier 10, and transmits a signal to the information input long / short pulse generation circuit 13 when the relay signal is not received for 2 seconds, for example.
Long and short pulses are created according to the information from the input circuit 14 and transmitted to the OR circuit 17. As a result, even when the field device up to the preceding stage has failed and there is no input, it is possible to transmit its own information.

In FIG. 4, (a) is a transmission waveform diagram of the field device at the preceding stage, and (b) is a waveform for relaying the signal from the preceding stage and further transmitting its own signal. , Input “1” is 0.5msec in width, input “0” is 1m
sec, end signal is 2 msec, interval signal is 1 msec
Is a signal of width. When the signal from the previous stage is relayed and the end signal is detected, the end signal is converted into a section signal having a width of 1 msec by the information input long / short pulse creating circuit 13 in FIG. The relay short pulse creating circuit 15 creates an input "1", that is, a signal having a width of 0.5 msec, and the relay long pulse creating circuit 16 creates an input "0", that is, a pulse having a width of 1 msec, and outputs it to the OR circuit 17. ing. On the other hand, its own signal is created by the information input long / short pulse creation circuit 13 through the input circuit 14, added to the relay signal, and transmitted through the power amplification circuit 18 through the communication cable 21. The operation timing of each device is a 20 KHz signal from the clock generation circuit 19, and the power supply 20 is supplied to each device.
5V or 6V is supplied.

The data added through each field device is input to the display device 2. In the display device 2, as many 8-bit shift registers + latch circuits 24 as the number of field devices are connected in series, and 8-bit serial signals corresponding to each field device are sequentially added to each shift register. It can be stored. These data are displayed corresponding to "1" and "0" by the LED for each bit. The field device and the display device are system-asynchronous, and each device is synchronous.

FIG. 5 shows the line connection of each field device, and FIG.
Shows the appearance of the display device and the field device. As shown in FIG. 5, each field device operates with a power supply of AC 100 V, relays a signal from the previous stage with input 7 information, adds its own information, and transmits it to the next stage. Can display 16 locations. As shown in FIG. 6 (a), the display device has indicator lights corresponding to the respective field devices in the vertical direction, and the green indicator light at the uppermost stage performs normal display, and the seven information indicator lights below it. "1" and "0" information is displayed. Further, as shown in FIG. 6 (b), the field device is provided with a reception indicator light and a transmission indicator light, and displays the reception and transmission states.

[0016]

As described above, according to the present invention, the data of each field device is transmitted, this data is relay-amplified by the next field device, and after completion of the relay, its own data is added and transmitted. Since there is no need to set the position, the relay distance is short even if the transmission distance is long, so the transmission distance is not limited and can be increased, and only when there is an input as in the past. It is also possible to display all the information as compared with the case where it is displayed.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a data addition type data relay transmission device of the present invention.

FIG. 2 is a diagram showing a data transmission time chart.

FIG. 3 is a diagram showing a circuit configuration of a field device and a display device in FIG.

FIG. 4 is a diagram showing a transmission signal waveform.

FIG. 5 is a diagram showing a line connection of each field device.

FIG. 6 is a diagram showing appearances of a display device and a field device.

FIG. 7 is a diagram showing a configuration of a conventional centralized monitoring device.

FIG. 8 is a diagram showing a time series chart.

[Explanation of symbols]

1 ... Field device, 2 ... Data addition type data relay transmission display device, 10 ... Amplifier, 11 ... Detector, 12 ... Timer, 1
3 ... Long / short pulse generation circuit for information input, 14 ... Input circuit,
15 ... Relay short pulse creation circuit, 16 ... Relay long pulse creation circuit, 17 ... OR circuit, 18 ... Power amplification circuit, 19
… Clock generator, 20… Power supply, 21… Communication cable,
22 ... Amplifier, 23 ... Detector, 24 ... 8-bit shift register + latch circuit, 25 ... Clock generation circuit, 26 ...
Power supply.

Claims (4)

[Claims] 1. A plurality of field devices are connected in series to a display device, and each field device relays and amplifies the transmission data from the preceding stage to the next stage, and transmits its own data after completion of the relaying.
A data addition type data relay transmission device characterized in that all site data is transmitted to a display device for display. 2. The apparatus according to claim 1, wherein each field device includes a relay signal detection circuit, a short pulse and long pulse creation circuit for the detected relay signal, an information input long / short pulse creation circuit, and a relay. A data addition type data relay transmission device, comprising: a long / short pulse creation circuit and an adder circuit for adding the outputs of the information input long / short pulse creation circuit. 3. The apparatus according to claim 2, wherein each field device further comprises a timer activated by a relay signal, and when the relay signal is interrupted for a predetermined period of time, the information input long / short pulse generation time is driven to drive its own data. A data addition type data relay transmission device, characterized by creating and transmitting. 4. The device according to claim 1, wherein the display device serially connects as many shift registers as the number of field devices, the number of bit shift registers corresponding to the number of information transmitted by the field devices.
A data addition type data relay transmission device characterized in that LED display is performed corresponding to the bits of each shift register.