SU809300A1 - Apparatus for receiving telemetering information - Google Patents

Description

the first output of which is connected to the binary counter and the second input of the state object being monitored, the second and third outputs are connected to the first and second reversible counter inputs, the fourth output is connected to the second input of the counting and pulse decryption unit in the series, the output of the binary counter is connected to the third input of the reversible counter, the output of which through the decoder of the state of the monitored object is connected to the third input of the registration unit of the state of the monitored object.

Figure 1 shows the signal structure, explaining the principle of operation of the device; figure 2 - block diagram of the device.

Information transfer (Fig.) Is carried out using pulse width discrete modulation of both active pulses and pauses between them. Such a structure allows to obtain a high density of pulse fronts, which facilitates the conditions of receiver clock synchronization, and also enables the independent transmission and reception of information from two categories of urgency. In particular, active pulses can transmit cyclically frame-by-frame transmission of information from a significant number of sensors that allow relatively rare state counts. At the same time, the device for receiving telemechanical information should provide frame synchronization, counting of positions of the received signal, checking for absence or correction of errors when using correction codes, etc. By modulating the length of the pauses, a second type of information can be transmitted from the sensor, which requires a high rate of state counts, while ensuring robust reception. There is no need for frame-by-frame synchronization and position counting to receive such information. The presence of a redundant transmission rate of the second type of information makes it possible to use an accumulation method for protection against errors. Figure 1 shows an example of a signg with binary discrete modulation of the pulse duration and ternary modulation of pauses. A three-cycle pause length is used for frame synchronization (SC).

The device for receiving telemechanical information contains (FIG. 2) a narrowband amplifier 1 connected to a line, communication (not shown in FIG. 2), an information pulse series separation unit 2, a shift register 3, a decoder 4 of the shift register 3, a recording unit 5 states of the monitored object, block 6 of counting and decoding pulses in a series, binary counter 7, reversible counter 8, decoder 9 of the state of the monitored object.

The device works as follows.

The information layout through the narrow-band amplifier 1 is fed to the input of the unit 2 for separating the series of information pulses and to the first input of the shift register 3. Register 3, intended for the CPU to receive a fragment of the information layout, is gated by block 2 for separating a series of information pulses. A piece of information from register 3 is fed to the input of the decoder 4, where it is analyzed. From the output of the decoder 4, the signals are fed to the input of a binary counter 7, which counts if there is a communication failure in the layout, and when filled, simulates a busy occupation

the controlled object (block-section) to the reversible counter 8, controlled by signals from the decoder 4. The reversible counter 8 through the decoder 9 generates signals The block-section is occupied and the block-section is free, which go to block 5 of the state being monitored an object, to the other input of which pulses are received from a block 6 of counting and decoding pulses in a series, which is synchronized by a block 2 of separation of a series of pulses.

Claims (2)

Invention Formula A device for receiving telemechanical information, containing a narrowband amplifier connected to a communication line, the output of which is through a block separating the series of information pulses is connected to the first input of the counting block and deciphering the pulses in the series, the output of which is connected to the first input of the registration block of the state of the monitored object, characterized in that, in order to improve the noise immunity and speed of the device, the shift register, the shift register decoder, the binary and reversible counters and the state decoder of the monitored object are entered, the output of the narrowband filter and the output of the information pulse separation unit are connected respectively to the first and second inputs of the shift register, whose output is connected to the shift register decoder input, the output of which is connected to the input of the binary counter and the second input of the state object being monitored, the second and the third outputs with the first and reversible counter inputs, the VERT output with the second count input and pulse decoding in the series, the binary counter output with the third input of the reverse counter, the output of which is connected via the decoder of the state of the monitored object to the third input of the registration unit of the state of the monitored object. h-g n-n c / f I mlmm Sources of information taken into account in the examination 1. System of remote signaling DS | 1920. Technical specification t.1920 R 1072, Finl ndi, A / O NOKIA electronics. 2. Automation, remote control and communication. Transport, 1977, 11, p.43 fig.1, (prototype). shzhm