SU1569859A1 - Device for emergency-warning signalling - Google Patents

Abstract

The invention relates to automation, in particular to multi-channel signaling devices, and can be used in centralized control systems for limiting parameter values in process control. The aim of the invention is to improve the reliability and information content of the device. To achieve the goal, a device containing a sensor, two wires of a communication line, three OR-NOT elements, an indicator, an audible alarm, two AND-NOT elements, an OR element, a test button, an opening button for the audio signal, a pulse generator, two the AND element, the third NAND element, two memory elements, five NO elements, a short pulse shaper, two current-limiting elements, and the eject button is complemented by a switching contact. The device provides continuous monitoring of the health of both the entire device and the sensor channel, ensures timely detection and repair of faults in the sensor communication lines, as well as monitoring short-term exceedances of parameter limits, which allows service personnel to take preventive measures and prevent damage to the entire controlled object. 1 il.

Description

The invention relates to automation, in particular to multi-channel signaling devices, and can be used in centrally controlled systems for limiting values of parameters in process control.

The purpose of the invention is to increase the reliability and informativeness of the device,

The drawing shows a diagram of the device.

The device contains elements NOT i - i, elements 5-7, ojit-cops And 3

and 9, sensor 10, check button 11, short pulse shaper 12, buzzer 13, memory element 1, element OR 15, opening-16 and switching 17 finished with an acoustic signal, element OR-NOT 18-20, indicator 21, osc. Rt 22 pulses, the element is NOT 23, the current and current are low-leveling elements made of resistors 24 and 25, the element 26, and pins 27 and 28 of the source pi wires 29 and 30 of the SRY - H line

ate

05 QD 00 SL

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The device works as follows.

. In the initial state, when the contact of the sensor 10 is closed, a logical zero signal is received at the inputs of the OR-NOT elements 18 and 19, as a result of which the output of the OR-NO element 20 is set to a signal of the logical unit and the indicator 21 is turned off. The input of element 2 receives a logical unit signal, therefore, a logic zero signal is set at its output, the control pulse is not fed to the input of memory element 14, and the audible alarm 13 is turned off. When the sensor 10 contact or the check button 11 is opened, the signal of the logical unit arrives at the input of the NAND element 6, the output of which is set to the logical zero signal, and the result is the logical unit output of the NOT element 2. At the moment of the appearance of this signal from the output of the shaper 12 of the short pulse, a pulse arrives at the input of the memory element 14, which turns on its buzzer 13. When the signal of the logical unit arrives at the input of the element OR 15, a signal of the logical unit appears at its output. A positive differential at the clock input of the memory element 26 produces a logical unit signal at its output. The signal of the logical unit p of the output of the memory element 26 enters the input of the memory element made of the elements ORI 18 and 19. This memory element switches, and a logical unit signal appears at the output of the element ORI 19. Thus | A signal of a logical unit arrives at one input of the AND 9 element, and rectangular pulses are generated at the other input, which are generated by the generator of 22 pulses. As a result, pulses inverted with respect to pulses from generator 22 are generated at the output of the element OR-NOT 20, and the indicator 21 is blinking. After the operator receives the sound and light signals, the button will reset the sound signal. The memory element formed by the elements OR-NOT 18 and 19 returns to the initial state and the signals of the logical unit appear on both inputs of the element AND 8, the indicator

0

five

2t is evenly lit, memory element 14 is turned off and the buzzer 13 is turned off. If contact

Sensor 10 returns to its original state before the operator depresses the sound reset button, then the indicator lamp 21 continues to glow with a flashing light. After pressing the button to remove the sound

signal indicator 21 turns off

when a controlled parameter reaches its operating range. The test of the checker is broken by the tag 10, resulting in the entrance

element and NOT 6 signals are received

logical unit. In this case, the device operates as in the case of the maximum deviation of the monitored parameter.

When the wires 29 or 30 of the communication line are broken, at the output of the HE elements 23 or 4, signals of the logical unit appear that go to the gate of the OR 15 element and turn on the indicator with 21 blinking lights. The flashing light of the indicator 21 without a sound signal indicates a fault in the wires 29 and 30 of the communication line of the sensor 10. After pressing the button for removing the sound signal, the indicator 21 switches to a steady light. The indicator 21 goes out, turns off after the breakage of the wires 29 and 30 of the communication line of the sensor 10 is removed.

With a simultaneous break of the wires 29 and 30 of the communication line, the signal of the logical unit is fed to the input of the element OR 15 from the output of the element NO 4, as a result of which the indicator 21 glows blinking.

Claims (1)

Invention Formula A device for alarm and warning, containing the first element OR-NOT, the output of which is connected to the first input of the second element OR-NOT, the output of which is connected to the first input of the first element OR-NOT, the third element OR-NOT, the output of which is connected to the indicator, a test button, the first output of which is connected to the first output of the power source and to the first output of the disconnecting contact of the 5 signal pickup button, the sensor, the first and second outputs of which are connected to the first terminals of the first and second respectively th wires n ±: w ;. communication element 0 five 0 five 0 OR, two NAND elements, a buzzer and a pulse generator, characterized in that, in order to improve the reliability and information of the device's activity, a third NAND element, a short pulse shaper, five NE elements, two memory element, two And elements, two current-limiting elements, and the audio signal pickup button is complemented with a switching contact, the second output of the test button is connected to the second output of the first wire of the communication line and is NOT connected to the first input of the first element AND-NOT through the first element out d which is connected to the first input of the second element AND- NOT and through the second element is NOT connected to the first input of the OR element, the output of which is connected to the first input of the first memory element and to the first input of the first element H, the output of which is connected to the first input of the third element OR -NO, the first output of the sensor is connected to the second input of the first NAND element, the second output of the sensor through the third element is NOT connected to the first input of the third I-IC element and is directly connected to the second input of the second element AND-NOT cher the fourth element is not connected to the second input of OR and cherech ;, j..kogo shaper to pulse - to the first input the second memory element, the second input of which is connected to the second n-interrupting contact of the audio pickup button, and the output to the first output of the audio signaling device, the second output of which is connected to the second output of the memory source, g the first output of the first current-limiting element, which the second current limiting element is connected to the second output of the second wire of the communication line, which is connected to the second input of the third NAND element, the output of which through the fifth element is NOT connected to the third input of the H 1Mt W element The first view of the first current-limiting element is connected to the second input of the second element OR NOT and to the first output of the switching contact of the sound pickup button, the second output of which is connected to the first output of the power source, and the third to the second input of the first memory element, the output of which connected to the input of the first element OR-NOT, the output of which is connected to the second input of the first element AND, the output of the second element OR-NOT connected to the first move of the second element AND, the output of which is connected to the second input third its element is OR NOT, the output of the pulse generator is connected to the second ROCH of the second element I.