SU1479684A1 - Spark-safe mine device for discrete monitoring of state of two-way sensors - Google Patents

Abstract

This invention relates to an intrinsically safe technique for controlling mine production processes. The goal is to simplify the design by reducing the number of optocouplers per sensor by half. This is achieved by a certain wiring diagram of the elements of the device, which contains two intrinsically safe power supply sources 1.2, optocouplers 4, 5.6. 1-6. N and contacts 7.1 - 7. N monitored sensors. Sequential polling of sensors is done via inputs 3 of the polling. The signals from these inputs are fed to the corresponding light-emitting elements of optocouplers 5,6.1-1-6.N. If the contact of any sensor is closed, then a current begins to flow through the photodetector of the corresponding optocoupler and the light emitting element of the optocoupler 4. The photodetector of the optocoupler 4 is illuminated and a signal appears at the output 8 of the device. 1 il.

Description

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sensors. Sequential polling of sensors is done via inputs 3 of the polling. Signals from these inputs are fed to the corresponding light-emitting elements of optocouplers 5, 6.1–6, p. If contact is closed

sensor, then through the photodetector of the corresponding optocoupler and the light-emitting element of the optocoupler 4 begins to flow current. The photodetector of the optocoupler 4 is illuminated and a signal appears at the output 8 of the device. 1 il.

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This invention relates to an intrinsically safe technique for controlling mine production processes.

The aim of the invention is to simplify the design of the device by halving the number of optocouplers per sensor.

The drawing shows a diagram of the device.

The device contains two intrinsically safe sources 1 and 2 of the power supply, inputs 3. interrogation of sensors, optocouplers 4, 5, 6.1-bp, contacts 7.1-7.P of monitored sensors and output 8 of the device. The first output of the light-emitting element of the first optocoupler 4 is combined with the first conclusions of the photodetectors of the optocouplers 5, 6.1-bp, the second output of the light-emitting element of the first optocoupler 4 is connected to the positive pole of the second power source 2, the negative pole of which is connected to the second pins of the respective optocouplers 5, 6.1-bp, the first pins of the light-emitting elements of which are combined and connected to the negative pole of the first power source 1, the second pins of which are inputs 3 polling the sensors, the first output of the photodetector of the optocoupler 4 is connected to the positive pole of the first power source 1, the second output of the photodetector of the optocoupler 4 is the output 8 of the device.

The device works as follows.

The signals from the polling inputs of the sensors 3 are fed alternately to the corresponding light-emitting elements of the optocouplers 5 and 6.1-bp.

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Let us consider the operation of the device by the example of monitoring the state of the sensor connected to the optocoupler 5. When a signal is received at the corresponding input 3 of the sensors, a current begins to flow through the light-emitting element of the optocoupler-5. If contact 7.1 of the sensor included in the photoreceiver circuit of the optocoupler 5 is closed, then the photoreceiver of the optocoupler 5 and the light emitting element of the optocoupler 4 begins to flow current. In this case, the photodetector of the optocoupler 4 is illuminated and a signal appears at the output 8 of the device. When sensors connected to the 6.1-bp optocoupler circuits are connected, the device operates in the same way.

When sequentially polling sensors, signals are fed to the polling inputs of the respective sensors, and a sequence of O or 1 signals appears at the output 8 of the device, each of which determines the on or off state of the polled sensors, and at each moment of polling the sensors at the output 8 of the device There is a signal about the state of the sensor polled via the corresponding input of the sensor.

Claims (1)

Invention Formula The mine intrinsically safe device for discrete control of the state of two-position sensors containing two intrinsically safe power sources and optocouplers, the first output of the photoreceiver of the first optocoupler being the output of the device, the first output of the light emitting element of the first optocoupler of the second optocoupler, the first The output of the light-emitting element of which is combined with the corresponding outputs of the Other optocouplers and connected to the negative pole of the first power source, characterized in that, in order to simplify the design due to a two-fold reduction in the number of optocouplers per sensor, the first outputs of the photodetectors of the remaining optocouplers are connected to the first output of the photodetector of the second optocoupler the second output of the photodetector The first optocoupler is connected to the second pole of the first power source, the second outputs of the photoreceivers of the remaining optocouplers are connected via sensors to the negative pole of the second power supply, the positive pole of which is connected to the second output of the light emitting element of the first optocoupler, and the second outputs of the light emitting elements of all optocouplers except the first are the polling inputs of the device's sensors.