JPS5970055A - Signal transmitting system - Google Patents

Abstract

PURPOSE:To transmit/receive local information from many stations through a series transmission line and to improve the reliability of a system with a simple device by forming a format for the transmission of information between respective stations in series by a synchronizing code, an address and local information. CONSTITUTION:Stations A, B, C transmitting many information are coupled with each other through respective transmission lines 5 and provided with plural input devices 1, 9, 10 respectively. Each of the stations A, B, C is also provided with an A/D converter 2 and a code transmitter/receiver 11 to digitize the information read out by the input device 1, encode the digitized signal and then send the encoded signal to the transmission line 5. The transmitting format is formed by a synchronizing signal, an address A and station information a, b-. A signal from the station A is received by the transmitter/receiver 11 of the station B, and after confirming whether the signal is processed by the self-station or not, the address B and the station information a, b- are applied to the station A. Thus, the station information of the many stations can be transmitted/ received in series by the transmission lines 5 and the reliability of the system is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a signal transmission system for transmitting and receiving information between multiple stations.

Conventionally, information has been transmitted and received between multiple stations using the method shown in FIG. In the figure, 1 is an input device for digital and analog information of the A station, 2 is an A/D converter, 3 is a converter, and 4 is a transmitter, all of which are installed in the A station. Further, 6 is a receiver, 7 is an Sβ converter, 8 is a digital/analog information output device, and 9 is an input device (digital/analog) of B station, and together with these, input devices 1. A7D converter 2. P/S converter 3 and transmitter 4 are receiving. Further, 5 indicates a transmission path connecting the A station and the B station.

Therefore, the operation of this transmission system will be described next. Now, when transmitting information between multiple stations, the transmission between two stations is also applied to the transmission with other stations, so if we look at the transmission system between stations A and B in Figure 1, we will first see that the The information passes through the input device 1, and the analog information is converted into digital information by the N0 converter 2, and is applied to the converter 3. Thereafter, it is powered up by the transmitter 4 and sent to the transmission line 5. On the other hand, at the B station, the receiver 6 receives the transmission signal from the A station, and the signal is outputted from the output device 8 via the ψ converter 7. That is, at this time, the information of the A station is converted into restored output information at the B station.

Furthermore, this information of the B station is again combined with the input device 9 of the own station A.
In the same way as the transmission method at the station, the information is sent from the input devices 1 and 9 of the B station to the next station (C station, D station, etc. 2 stations) via the transmitter 4, and finally the information of the A station. is transmitted to two stations desired in advance.

However, in such a serial information transmission system, the input device 1 . As the number of relays increases, the reliability of the relays decreases and the equipment becomes more complex.

SUMMARY OF THE INVENTION An object of the present invention is to provide a signal transmission method that eliminates the above-mentioned drawbacks and achieves the transmission and reception of information between multiple stations using a simple serial transmission path.

An embodiment of the present invention will be described below with reference to the drawings. Second
The figure is a system diagram showing a signal transmission system between three stations, A station, B station, and C station. In this figure, the same reference numerals as in FIG. 1 indicate the same or corresponding parts. 10 is C station digital
An input device for inputting analog information, 11 is a code transmitter/receiver, which creates a transmission signal and verifies a reception signal, and
It performs the functions of P/B conversion and ψ conversion mentioned above.

Next, FIG. 3 is a diagram showing an information transmission format of signals transmitted and received between each station as shown in FIG. 2. In FIG. 3, a synchronization signal is arranged first, followed by an address code and station information in this order.

Now, the information of station A is read by the input device 1, and the information from the VD converter 2. Assume that a transmission signal is sent from station A to station B via the code transceiver 11 on the transmission path 5. Then, the B station receives the signal from the A station, and the code transceiver 11 of the B station further verifies the first synchronization code of the received signal as shown in FIG. Next, as a result of this test, it is confirmed whether or not it should be processed by the own station. If it is normal, the A shown in Figure 3 is confirmed.
After the station information of the station, the address code and station information of the own station, that is, station B, are added to the series and arranged. The code transmitting/receiving encoder 11 of the B station further transmits the signal to which the B station information is added to the next C station. Thereafter, each station information is similarly transmitted as an information transmission format included in a series within a transmission signal each time it is relayed to each station. The above has been explained using the case where station A transmits as an example, but the same transmission is performed when station A receives, and since each station has transmitters 1 and 8, transmission and reception are It is clear that these deporters 1 and 8 operate in this case.

Furthermore, it is obvious that the transmission line 5 in this signal transmission system can be applied to either a double system or a double system.

As described above, according to the present invention, since the station information of multiple stations is transmitted and received through a serial transmission path, an inexpensive and highly reliable transmission system can be achieved. There is also the advantage that information informing about the abnormality of station A can be created as station information and transmitted from station B to other stations.
Information transmission between each station can be extremely simplified.

[Brief explanation of drawings]

Figure 1 shows the system block diagram of the conventional signal transmission system, and
The figure is a system block diagram of a signal transmission system according to an embodiment of the present invention, and FIG. 3 is a code format diagram of a transmission signal used in the embodiment of FIG. 1... Input device of A station, 2... NΦ converter, 3.
... converter, 4... transmitter, 5... transmission line,
6... Receiver, 7... ψ converter, 8... Output device, 9... B station input device, 1o... C station input device, 11... Code transceiver. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Nobu Kuzuno - (1 person) - Director General's Palace 1 Incident display 〒-M (1981-18101)
No. 7 No. 2 Name of the invention Signal transmission method 3, Relationship with the case of the person making the amendment Holding license No. 19 (i Person Address: 1-A2 Marunouchi 2-chome, Chiyoda-ku, Tokyo.
%3 Stigma (601) Mitsubishi Electric Corporation Representative Hitoshi Katayama 4, Agent f Principal Address 2-1 Marunouchi, Chiyo January-ku, Tokyo 2
No. 3 C) - G - Detailed explanation of the invention column 6 of the specification, contents of amendment (1) In the 6th line of page 2 of the specification, the phrase "receiving the transmitter 4" has been replaced with "transmitter 4". I am corrected by saying, ``I have 4 things.'' (2) In the 9th line of page 2 of the specification, the statement ``Three rounds of transmission is used when transmitting information between a majority of 7 stations'' has been amended to ``When information is transmitted between multiple stations, a transmission method between two agents is used.''5 (31 Specification, page 4, number 8, "transmission number" has been corrected to "transmission."
” has been corrected to read “input/output devices 1 and 8.” (The phrase ``obvious'' on page 5, line 6 of the 51 Specification is amended to ``obvious.''

Claims (1)

[Claims] In an information transmission system that sends and receives information between multiple stations, when transmitting information between each station, mutual transmission is performed using a signal of an information transmission format formed in a series of a synchronization code, an address code, and the above information. , verifies the synchronization code of the above signal received by the code transmitter/receiver in the own station, and when the verification is normal, the address code and information of the own station are successively renormalized into the signal and transmitted to the next station, thereby transmitting the information. A signal transmission method characterized by transmitting and receiving data over a serial transmission path.