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A switch solenoid valve control monitoring circuit and method

A technology for switching solenoid valves and monitoring circuits. It is applied in the direction of circuit breaker testing, etc. It can solve the problem of limited operating life of electromagnetic relays, easy adhesion or mechanical failure, and inability to monitor the open circuit status of the switching solenoid valve circuit or the normal connection working status, etc. question

Active Publication Date: 2021-04-27
THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The hydraulic system on traditional special vehicles uses a large number of on-off solenoid valves for hydraulic circuit control, and mainly uses small electromagnetic relays to control the on-off solenoid valves. failure; in addition, this method cannot monitor whether the switching solenoid valve circuit is in an open circuit state or is in a normal connection working state, which is likely to bring harm to the user in the process of controlling the switching solenoid valve, and also brings great trouble to the troubleshooting of the control circuit
At present, there are few methods for monitoring the switch solenoid valve control circuit, and they are highly specific, and it is difficult to adapt to the monitoring of the switch solenoid valve circuit under the multi-working conditions of special vehicles

Method used

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  • A switch solenoid valve control monitoring circuit and method

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Embodiment 1

[0026] see figure 1 As shown, the embodiment of the present invention provides a switch solenoid valve control monitoring circuit, which is used for real-time monitoring of the switching solenoid valve circuit, so as to ensure stable control and safe and reliable operation of the switch solenoid valve.

[0027] The switching solenoid valve control monitoring circuit in this embodiment includes a current monitoring circuit and a voltage monitoring circuit. The current monitoring circuit includes a field effect tube and a current detection module. The drain of the field effect tube is connected to the power supply end of the switching solenoid valve circuit after passing through the current detection module, and the source of the field effect tube is grounded after passing through a resistor RS; the current detection module is used for Collect the working current I of the field effect tube when the field effect tube is turned on 0 , and compare it with the current threshold to ...

Embodiment 2

[0030] The difference between this embodiment and Embodiment 1 is that the voltage monitoring circuit includes a comparator and a resistor RP, the output terminal of the comparator is connected to the gate of the field effect transistor, and the positive input terminal of the comparator is connected to the source of the field effect transistor. One end of the resistor RP is connected to the power supply end of the switching solenoid valve circuit, and the other end is connected to the positive input end of the comparator.

[0031] The above-mentioned voltage monitoring circuit also includes a reference voltage U 0 l, the above reference voltage U 0 l is connected to the inverting input of the comparator, the reference voltage U 0 l is the above-mentioned voltage threshold. When U 0 0 1, the switch solenoid valve circuit is in the open state, when U 0 > U 0 1, the switch solenoid valve circuit is in an open circuit state.

[0032] In the embodiment of the present inventio...

Embodiment 3

[0034] The difference between this embodiment and the above-mentioned embodiment is that the switching solenoid valve control and monitoring circuit also includes a microprocessor, and the above-mentioned microprocessor is connected with the field effect tube through the optocoupler isolation module, so as to control the operation of the switching solenoid valve circuit and feedback The monitoring result of the voltage monitoring circuit. The control signal IN and the feedback status signal ST of the microprocessor are connected to the optocoupler isolation module, and the microprocessor can control the switch solenoid valve circuit to work under the condition that the microprocessor controls the source output of the FET through the optocoupler isolation module.

[0035] The detection end of the current detection module is also connected with the microprocessor. The preset current I when the field effect transistor is turned on is set in the microprocessor0 l, the above preset...

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Abstract

The invention discloses a switch solenoid valve control monitoring circuit and method, and relates to the technical field of solenoid valve control and monitoring. The circuit includes a current monitoring circuit and a voltage monitoring circuit. The current monitoring circuit includes a field effect tube and a current detection module. The field effect tube The drain of the current detection module is connected to the power supply end of the switch solenoid valve circuit, and the source of the field effect tube is grounded after passing through the resistor RS; the current detection module is used to collect the working current I of the field effect tube when the field effect tube is turned on. 0 , and compare it with the current threshold to determine whether the switch solenoid valve circuit is on or off; the voltage monitoring circuit is used to collect the source output voltage U of the field effect tube when it is not conducting 0 , and compare it with the voltage threshold to judge whether the switch solenoid valve circuit is on or off. The switch solenoid valve control monitoring circuit of the present invention has simple structure, convenient operation and long service life, and can monitor the switch solenoid valve circuit in real time, thereby ensuring stable control and safe and reliable operation of the switch solenoid valve.

Description

technical field [0001] The invention relates to the technical field of solenoid valve control and monitoring, in particular to a control and monitoring circuit and method for a switching solenoid valve. Background technique [0002] A large number of on-off solenoid valves are used in the hydraulic system of traditional special vehicles for hydraulic circuit control, and small electromagnetic relays are mainly used to control the on-off solenoid valves. failure; in addition, this method cannot monitor whether the switching solenoid valve circuit is in an open circuit state or is in a normal connection working state, which is likely to bring harm to the user in the process of controlling the switching solenoid valve, and also brings great trouble to the troubleshooting of the control circuit. At present, there are few methods for monitoring the control circuit of the switch solenoid valve, and they are highly specific, and it is difficult to adapt to the monitoring of the swi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327
Inventor 李刚谢克峰贺秦南李秀珍陈平
Owner THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD