SU1141433A1 - Telemetering device - Google Patents

Abstract

A DEVICE FOR TELE-MEASUREMENTS containing sensors, the output of which through the switch is connected to the information input of the analog-digital converter, as well as the clock pulse generator, the first output of which is connected to the control input of the switch, in order to improve the measurement accuracy, A shaper of test pulses and a series-connected delay block, a trigger and a key are entered, the transducer of which is connected to the input of the analog-digital converter j information input d key is connected to a second output clock pulse generator, a first output connected to the combined inlet vtorm trigger input of the delay unit and the input of the pulse shaper verification, the output of which is connected to the information input of the analog-digital converter.

Description

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The invention relates to telemetry and can be used in electronic switching systems and encoding information from analog sensors. A device for telemetry is known, which contains sensors whose outputs are connected to informational inputs of keys whose outputs are combined. The disadvantage of this device is the low reliability of the transmitted information, due to the lack of detection of sensor signal wires. The closest technical solution to the invention is a device for telemetry, containing sensors, the outputs of which through a switch are connected to the information input of an analog-digital converter, as well as a clock generator, the first output of which is connected to a control input of a C2L commutator. for telemetry, the reliability of the transmitted information is low due to the lack of detection of breaks in the signal wires. The aim of the invention is to increase the reliability of measurements. This goal is achieved by the fact that a test pulse generator and a pulse generator are inserted into the telemetering device, which contains sensors whose outputs through a switch are connected to the information input of an analog-digital converter, as well as a clock pulse generator, the first output of which is connected to the switch control input. but the connected delay unit, trigger and key, the output of which is connected to the clock input of the analog-to-digital converter, the information input of the key is connected to the second output of the generator t ktozyh pulses, in the course of which the first is connected to the second input of concatenating the trigger input of the delay unit and the input of the pulse shaper about verochnyh whose output is connected to the data input of the analog-digital converter. The drawing shows the structural electrical circuit of the device for telemetry. The device for telemetry contains sensors 1, switch 2, analog-to-digital converter 3, generator 4 clock pulses, formatter 5 test pulses, block 6 delay, trigger 7 and key 8. Device for telemetry works as follows. The generator 4 generates sequences of polling pulses of sensors 1 and tactical pulses controlling the operation of analog-digital converter 3. Polling pulses open the corresponding channel elements of switch 2, through which signals from sensors 1 arrive at information input of analog-digital converter 3. Coding clock pulses come from the second output of the generator 4 to the control input of the analog-to-digital converter 3 through the key 8 with a delay set by block 6. For the time delay the key 8 is locked scarlet with trigger 7, controlled, delayed and undelayed pulses survey. The test pulses produced by the shaper 5 charge the capacitance of the circuit from analog-digital converter 3 to sensor 1, the value of which is equal to the sum of the capacitances of sensor 1, cable, switch 2, ana-. logo-to-digital converter. The amplitude and duration of the test pulse, as well as the delay time at the beginning of the parameter coding, satisfy the following conditions: if the circuit of the analog-digital converter 3 - sensor 1 is dead, then by the time the coding starts, the voltage value at the analog-digital information input the converter 3 must be greater than the maximum voltage of the measuring box so that it is possible to distinguish the normal reading from o6i.iBa, if the circuit of the analog-to-digital converter 3 - sensor 1 is healthy, then At the coding time, the total capacitance should, or be able to discharge through the resistance of sensor 1 to the value of the output voltage of sensor 1, S1I not be able to charge to a value exceeding the permissible measurement error.

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Claims (1)

A device for telemetry containing sensors, the outputs of which through the switch are connected to the information input of an analog-to-digital converter, and also a clock pulse generator, the first output of which is connected to the control input of the switch, different from that, in order to increase the reliability of measurements, a test pulse shaper and a delay unit connected in series, a trigger and a key, the output of which is connected to the clock input of an analog-to-digital converter, an information input are introduced into it Lyucha connected to the second output of the system clocks O pulses, a first output connected to the second input of the combined trigger input of the delay unit and the input of the validation pulse whose output 5 is connected to the logo An information input to digital converter.