SU1191905A1 - Information input device - Google Patents

Abstract

DEVICE FOR INPUT OF INFORMATION, containing multiplexer, analog-digital converter and control unit, the first input of which is connected to the first output of the analog-digital converter, the first and second inputs of which are connected respectively to the output of the multiplexer and the first output of the control unit, the second output and outputs of the group of which are connected respectively with the control input and with the address inputs of the multiplexer, the information inputs of which are the information inputs of the device. characterized in that, in order to increase the reliability of the device by increasing its noise immunity, the first, second and third galvanic isolation units and the three-polar code generator, whose outputs are information outputs of the device, the first and second inputs are entered into the device. the triple-polar code generator is connected via the first and second galvanic isolation units, respectively, with the first and second outputs of the code converter, the group inputs and the first i input of which are connected to Response (Obviously with the outputs of the group and the second output of the analog-digital converter, the second input of the code converter is connected to the second output of the control unit, the second input of which is connected to the output of the third galvanic isolation unit, the input of which is the control input of the device. ate

Description

The invention relates to computational and information-measuring equipment and can be used in automated systems for collecting experimental data, for example, in field studies and tests of radio electronic systems at facilities.

The purpose of the invention is to increase the reliability of the device by increasing its noise immunity.

The drawing shows a block diagram of the device.

The device for inputting information contains a multiplexer 1, an analog-to-digital converter 2, a control unit 3, a code converter 4, a tripolar code generator 5, a power supply 6, a transformer 7, the first second and third blocks 8, 9 and 10 of galvanic isolation, entrances and exits 11-1.4.

The proposed device works as follows.

The corresponding inputs 14 of multiplexer 1 receive analog signals from the object's sensors. When a sync pulse arrives at the input 13 from the object, in this case, the start of the cycle, the computer on control input 12 receives a pulse and is prepared to receive information from the device in the corresponding reference time (from the internal generator) In which will be produced. Interrogation of analog sensors. Simultaneously, a control unit 3 is connected via galvanic isolation unit 8, which via multiplexer 1 connects the analog signal of the first sensor to the measuring input of the A / D converter. At the output of the control unit a pulse is output to the input of the A / D converter 2. At the end of the conversion process from the ADC code to the input of the control unit is signal the end of the measurement. By this signal, the control unit opens the second channel of the switch and starts the ADC 2 again. After the last sensor has been polled from the pulse End of the measurement, the control unit does not generate an ADC trigger signal. The control unit 3 starts a new sensor polling cycle with the arrival of the next pulse. The cycle begins (input 3 of the device J.) At the end of the process of polling each sensor, the converter 4 code from the A / D converter 2 receives the parallel parameter code and the Output code signal from the corresponding outputs. In addition, each cycle simultaneously with the code of the first parameter to the input of the converter of 4 codes, the signal from the control block is a sign of the first channel.The converter 4 generates. At the output, one polar information trace information code with HAND parameter code to sign bits of the first channel and the parity word and the serial code serial clock.

Information from the outputs of the converter 4 codes through blocks 9 and 10 galvanic isolation comes to the corresponding inputs of the generator 5. In the polling cycle of sensors from the outputs of the generator 5 to the information input of the computer receives successive two-polar three-level codes of parameters of the object. In a computer, a serial code is converted into a parallel code. The dispatcher checks the parity of the code word and the presence of a bit. A symptom of the first channel. If there are no failures in the code word after the parity check and if there is one in the bit, the Symptom of the first channel contains the information bits in the memory cell reserved for the code of the first parameter. The following code arriving at the computer in the sensor polling cycle is entered into the cell for the second parameter code and so on until the last sensor parameter code is entered. Thus, the time code and parameter codes of all sensors are recorded in their corresponding computer memory cells.

Claims (1)

A device for inputting information comprising a multiplexer, an analog-to-digital converter and a control unit, the first input of which is connected to the first output of the analog-digital converter, the first and second inputs of which are connected respectively to the output of the multiplexer and the first output of the control unit, the second output and the outputs of which are connected respectively with a control input and with address inputs of a multiplexer, the information inputs of which are information inputs of the device. characterized in that, in order to increase the reliability of the device by increasing its noise immunity, a code converter, first, second and third galvanic isolation units and a tripolar code driver are inserted into the device, the outputs of which are information outputs of the device, the first and second inputs of the tripolar code generator are connected respectively, through the first and second blocks of galvanic isolation with the first and second outputs of the code converter, the group inputs and the first input of which are connected respectively Along with the group outputs and the second output of the analog-to-digital converter, the second input of the code converter is connected to the second output of the control unit, the second input of which is connected to the output of the third galvanic isolation unit, the input of which is the control input of the device. 1 1191905 2