SU635507A1 - Telemechanics signal transmitting/receiving method - Google Patents

Description

the equipment installed at the control point and at the controlled point operates synchronously during the BCOJ-Q N.t. After issuing the sync pulse, the Pungsg Element generates and sees into the communication line a group of signals corresponding to the operation code, which must be performed with a controlled iiyiiKiOM. The latter takes the given ground of the cnnals, decrypts it and performs the operations corresponding to the received code. In the second group of dehumidification, the exchange of information and service signals between the control point and the controlled hole is in accordance with the code transmitted in the first group. Moreover, the second group of sigals can have a variable number of cycles, which is also determined by the operation code transmitted in the first group of signals. The third group consists of one measure. At this step, the last one in the exchange of data exchange, a control sigal is transmitted from the controlled nykt, which indicates whether there is a distortion of the signals irinded by the controlled pupt. In the absence of distortions, the monitored trigger gives a signal 1, and the detection of distortions - 0.

For the known methods of transmitting telemechanical signals, a fiite is established for the duration of the cycle of signals between the control point and the control point. When using the controllable point of the myfunctional blocks, the number of service and information bits of the signals exchanged between the control point and the controlled point depends on the function performed in this exchange cycle.

If in the proposed method we apply a fixed exchange cycle time, then it will be chosen equal to the maximum possible duration in order to ensure the transmission of signals for any operation. For a number of operations in the second group of signals, all the cycles will be used to transmit useful information. In other operations, part of the cycles in the second group of signals will be idle, idle. In order to more rational use of the time of exchanges between the control point and the controlled point, excluding idle cycles, the number of cycles in the second group of signals is determined by the operation code transmitted in the first group of signals.

All sigals transmitted via the communication link between the control point and the control point are transmitted in the correlation code, which is characterized by the representation of the unit by the combination of signals 10, and the hum by 01.

The drawing shows the O and 1 signals in the correlation code.

The use of the correlation code is significant (.), And (-controlled signals, p1- | 1davdaemye on the communication line, which can be affected by external interference, since in each clock cycle there is a signal equal to but durable1) Post / 2 clock cycles , n nauza,) but the duration / 2 cycle.

A) Interference exposure may cause a signal to appear during a pause or absorb a useful signal. Control circuits easily detect this type of Kenya lawsuit and information from scholars and merchants. The occurrence of nstehn, which is BJ.I; It has a very useful signal and a position (c) signal but c) see a pause for one measure, extremely rarely.

The use of a correlation code of not 0 increases the transmission time of information as compared to the usual pause code, in which, after transmission of each bit of information to the communication line, a pause is formed, the duration of which should be no less than the time full discharge of the parasitic capacity of the communication line.

The presence of pauses is necessary so that the equipment does not perceive the information, represented by several units, as a synchronizing pulse, the duration of which is usually chosen to be equal to the duration of several cycles.

For ease of explanation, it can be assumed that the duration of the signal is equal to the time of charge of the line, and the duration of the pause is the discharge time, and the time of charge and discharge of the line are equal to each other and equal to t. For a correlation code, the duration of the information cycle consisting of a signal and a pause or a pause and a signal will be equal to Tk 2 /. For a pause code, the duration of a cycle consisting of a signal (1 or 0) and a pause will be Tp 2 / ..

Therefore, for this and for the other 5 code, the duration of the information cycle is equal. However, the information transmitted in the correlation code is monitored at each cycle and for all single interference, and for a number of double, triple 0, etc. interference, there is no need to increase the number of bits of information transmitted and increase the transmission cycle. Protecting information transmitted by the pause code (parity protection, retransmission, etc.) will increase the transmission cycle.

Claims (2)

1.Evtushenko II- N. Telekanika in automated systems control. M., “Energie, 1970, p. 66 2..Lvto.matikp and geleme.chalika. 1968, No., 125–129. | Th L $ i .. About