SU1363285A1 - Apparatus for transmitting the telemetering frequency signals - Google Patents

Abstract

The invention relates to telemechanics and can be used in computing and telemechanical systems for the sporadic transmission of sensor signals of the state of technological objects and sensor signals with a number of pulsed output. The purpose of the invention is to improve the noise immunity of the device. The device contains signal sensors 1, a counter 2, a parallel code to serial converter 3, a synchronization unit 4, a unit 5 logic level 1, a threshold unit 6, a memory unit 7, a comparator 8. The purpose of the invention is achieved by introducing a threshold unit into the device between the output the converter 3 and the information input of the block 7, the Schmidt trigger is used as the threshold block with the input element And the synchronization trigger at the output, which allow additional logic control of the weights signal efficiencies increase the reliability and, therefore, noise immunity of the message. 2 ill., 1 tab. § (L Od 05 SAD u o o ate

Description

11363285

The invention relates to computing and can be used in computing and telemechanical systems for the sporadic transmission of sensor signals of the state of technological objects and sensor signals with a pulse-pulse output.

The aim of the invention is to improve the noise immunity of the device without a significant increase in cost.

10 1

FIG. 1 shows a functional diagram of the device; in fig. 2 - timing charts of the operation of the sync block.

The device contains signal sensors 1, a counter 2j a parallel code to a serial code converter 3, a synchronization unit 4, a logic level setpoint generator 5, a threshold unit 65, a memory unit 7, a switch 8, information inputs 9, a clock input 10, a device output 11, outputs 12 -16 synchronization unit 4, while the level adjuster logical 1 is made in the form of a resistor.

The device works as follows.

The information zooms 9 receive signals from sensors with discrete levels O or 1. The device records the change in the state of the input from O to 1 and in this case generates a request for the transmission of a television signaling or another counting pulse for the accumulator of integral telemetry from its output 11 sensors with a number of pulse input.

The clock input 10 to block 4 receives a pulse sequence HocTbj which causes the appearance of control signals at its outputs in accordance with the timing diagram. The signal from output 12 arrives. to the input of counter 2, which is used to poll the inputs of the converter 3, the output of counter 2 also sets the address of the memory cell in which the previous state of this channel is stored. Reading information on the corresponding input of converter 3 and reading from block 7 the previous value of this channel

produced by signals from the outputs

13 and 14 of block 4, respectively

The following is the truth table of the device for the moment of reading the memory block 7 and polling the input "

10 1

ABOUT

ABOUT

ABOUT

0

5 o

g

five

0

As follows from the truth table, the request signal at the output 11 of the device occurs when the input signal of this channel changes from state O to state 1. In the case when the signal from the output of converter 3 has a level O or 1, the corresponding cell of block 7 records the new state of the fired channel. If the signal from the output of converter 3 is distorted by interference and has an intermediate value that does not correspond to the levels O or 1, the memory value of block 7 corresponding to this input 9 should be preserved. In this case, at the first input of the threshold unit 6, a high level signal is applied through setpoint 5 corresponding to 1. The output state of the threshold unit 6 is determined by the state of its second input and the previous state of the polled input 9 is again recorded in the corresponding cell of the memory unit 7. The value of the setpoint resistor 5 is determined by the element base used and the specified noise immunity. The Schmidt trigger with the input element and the synchronization trigger at the output is used as the threshold block.

Claims (1)

Invention Formula A device for transmitting telemechanical signals containing sensors of signals whose outputs are connected to information inputs of a parallel code-to-serial converter, and a comparator whose output is a device output, characterized in that, in order to improve noise immunity, a counter is entered into it, the threshold unit , the unit of logic level 1, the memory unit and the synchronization unit, the group of outputs of the counter is connected to the address inputs of the parallel-to-code converter and the memory unit, the output the forming of parallel code sequentially connected to the output the unit of the logic level 1 - and the first input of the threshold unit, the second input of the last and the inverter input of the comparator are connected to the code of the memory unit, the output of the threshold unit is connected to the first input of the memory unit and the first input of the comparator, the input of the synchronization unit is a clock input of the device, The first output of the synchronization unit is connected to the counter input, the second output is connected to the input of the parallel code converter to the serial one, the third output is connected to the second input of the memory unit and to the second input of the comparator, the fourth output is connected to The memory input of the memory unit, the fifth output with the clock input of the threshold unit, the level setpoint logic 1 input is the unit output of the device.  I I Ы 1 15 ... gig of Rig. 2 Editor E. Kopcha Compiled by Z. Nizamutdinova Tehred L. Oliynyk Order 6366/44 Circulation 544Subscribe VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035 Production and printing company, Uzhgorod, st. Project, 4 Proofreader V. But ha