SU1152012A1 - Information transmission device - Google Patents

Abstract

A DEVICE FOR TRANSFER OF INFORMATION, containing a generator of linearly varying voltage, the output of which is connected to the first input of the comparison unit, a control unit, characterized in that, in order to increase the informativeness of the device, a switch is inserted into it, the control unit is made on the OR elements, the element And, the pulse shaper, and the counter. the decoder, the output of the first element OR is connected via a pulse shaper to the first inputs of the counter and the element AND, the outputs of the counter are connected through the decoder to the corresponding inputs of the second element OR, the output of which is connected to the second input of the element And, the outputs of the decoder of the control unit are connected to the corresponding control inputs of the switch The information inputs of which are the information inputs of the device, the switch output is connected to the second input of the comparison unit, the output of which is connected to the first The inputs of the first OR element of the control unit, the combined second inputs of the first OR element and the counter, and the output of the first OR element of the control unit i are respectively the control input and output of the device (L output of the AND element of the control unit is connected to the generator input of a linear variable voltage wives

Description

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The invention relates to the coding of information and is intended for use in telemetric systems with pulse width modulation.

A device for transmitting information, comprising sensors, a switch, a pulse-width modulator and a transmitter 1, is known.

The disadvantage of this device is the difficulty of performing a pulse width modulator.

The closest to the invention in its technical nature is a device for transmitting information containing a linearly varying voltage generator, the output of which is connected to the first input of the comparison unit, the second input of the comparison unit is the information input of the device, the output of the comparison unit is connected to the first input of the unit control, the second input of which is the control input of the device, the output of the control unit is connected to the input of the counter, the outputs of which are the outputs of the device 2.

However, when using a known device, for ease of demodulation of a signal at the receiving side, the signal is transmitted at constant predetermined time intervals exceeding the duration of the signal corresponding to the maximum value of the transmitted signal, which reduces the information content of the device.

The purpose of the invention is to increase the information content of the device.

This goal is achieved by the fact that a device for transmitting information, containing a generator of linearly varying voltage, the output of which is connected to the first input of the comparator unit, the control unit, has a switch inserted, the control unit is made on the OR elements, the pulse driver, the counter and the decoder, the output of the first element OR is connected through the pulse shaper to the first inputs of the counter and the element And, the outputs of the counter are connected through the decoder to the corresponding inputs of the second element OR, the output of which It is connected to the second input of the element I, the outputs of the decoder of the control unit are connected to the corresponding control inputs of the switch, the information inputs of which are the information inputs of the device, the output of the switch connected to the second input of the comparator, the output of which is connected to the first input of the first element OR of the control unit the combined second inputs of the first OR element and the counter and the output of the first OR element of the control unit are respectively a control input and an output of the device, an output element enta

And the control unit is connected to the generator input of a linearly varying voltage.

FIG. 1 shows a block diagram of the device; in fig. 2 - time diagrams that show his work.

A device for transmitting information contains (FIG. 1) a comparison unit 1, a linearly varying voltage generator 2, a switch 3, a control unit 4 executed on an OR 5 element, forming a pulse body 6, a counter 7, a decoder 8, an OR 9 element and element and 10.

The device works as follows. When a control pulse arrives at the inputs of the element OR 5 and the counter 7 (Fig. 2a), the counter 7 is reset and the driver 6 is started, generating a pulse of a fixed duration sufficient to set the linear-varying voltage generator 2 (Fig. 26). With the trailing edge of the pulse, the first counter cell is thrown, and a number equal to one is written into it. At the first output of the decoder 8, a positive voltage level appears, which through the element OR 9 enters the input of the element AND 10 (Fig. 2c), at the other input of which there is a resolving potential from the inverse output of the former (Fig. 26), which ensures start generator 2 (Fig. 2e, g). At the same time, a permission signal is received at the first control input of the switch 3 and an analog signal U | passes at its output. Comparison unit 1, to the inputs of which

5, the linearly varying voltage from the generator 2 output and the voltage U from the switch 3 output (Fig. 2g) arrive at a moment when the voltages are equal and gives a short pulse, the distance from which the reference voltage carries information about the magnitude of the measured voltage. The generated pulse from the output of the comparison unit 1 through the element OR 5 (Fig. 2a) is fed to the starting input of the imaging unit 6. The starting impulse arriving from the output of the imaging device 6

5 closes the AND element 10 (Fig. 2e) and the generator 2 returns to the initial state (Fig. 2g). The duration of the pause is sufficient for setting the linearly-alternating voltage generator 2 to its original state. Rear edge of pulse

 the pause changes the contents of counter 7 by one more and the enabling signal appears at the second output of the decoder 8 (Fig. 2d), providing the next start-up cycle of the generator 2 and pb switching to the input

5 block 1 compares the stress of the chg. Further, the process is repeated in the same way.

The output information taken from the output of the OR 5 element (Fig. 2a) is a sequence of pulses, the time interval between which carries information about the parameter being measured. Channels are polled in order of increasing their numbers from the first to the last;

Comparison unit 1 is designed so that when a zero measured signal arrives at its input, a time interval of a fixed minimum value is formed, which is necessary to correctly decode the received information at the receiving point.

The conversion cycles are completed after polling the last of the measured channels, and the number of pulses in the packet is equal to the number of channels to be checked increased by one (due to the reference pulse), based on this and the capacity of the counter 7 is selected.

If necessary, use a control pulse in the form of a pack of two

pulses with a fixed temporal distance between them (the so-called "code feature"), the output of the decoder 8 corresponding to the first state of counter 7 is not activated, and the demand of the first channel starts when a resolution signal appears on the second output of the decoder 8. Conversion cycles are resumed when the next control pulse arrives.

Thus, the execution of control unit 4 by switch 3 and generator 2 with the introduction of feedback from the output of comparison unit 1 to the input of control unit 4 made it possible to reduce the total time of conversion cycles and to obtain output information in a compressed form due to the fact that each individual conversion begins upon completion of the previous one (with the exception of the time required to restore the initial state of generator 2).

Claims (1)

INFORMATION TRANSMISSION DEVICE, comprising a ramp generator, the output of which is connected to the first input of the comparison unit, a control unit, characterized in that, in order to increase the information content of the device, a switch is inserted into it, the control unit is made on the OR elements, the And element, pulse shaper, counter and. the decoder, the output of the first OR element is connected via a pulse shaper to the first inputs of the counter and the And element, the outputs of the counter are connected through the decoder to the corresponding inputs of the second OR element, the output of which is connected to the second input of the AND element, the outputs of the decoder of the control unit are connected to the corresponding control inputs of the switch, the information inputs of which are the information inputs of the device, the output of the switch is connected to the second input of the comparison unit, the output of which is connected to the first input m of the first OR element of the control unit, the combined second inputs of the first OR element and counter and the output of the first OR element of the control unit q are the control input and output of the device, the output of the And element of the control unit is connected to the input of the ramp generator. SU. „, 1152012 Figure 1