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Method and device for self-test of switch and switch self-test system

A technology of switch and self-checking signal, which is applied in circuit breaker testing, electrical testing/monitoring, etc. It can solve problems such as unsatisfactory stability and more accurate self-checking, and achieve the effect of accurate self-checking

Active Publication Date: 2019-05-31
SHENZHEN H&T INTELLIGENT CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the embodiments of the present invention is to provide a switch self-test method, device and switch self-test system, aiming to solve the problem that the existing technology cannot meet the requirements of more stable and accurate self-test

Method used

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  • Method and device for self-test of switch and switch self-test system
  • Method and device for self-test of switch and switch self-test system
  • Method and device for self-test of switch and switch self-test system

Examples

Experimental program
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Effect test

Embodiment approach 1

[0049] see further figure 2 , figure 2 It is a flow chart of a switch self-checking method according to an embodiment of the present invention. The method is applied to a washing machine, including:

[0050] Step 101: judging whether the door of the washing machine is closed;

[0051] Optionally, the self-test circuit is provided with a Meas_Door_Closed_ZK port, and the controller monitors the fluctuation of the self-test signal through the Meas_Door_Closed_ZK port to determine whether the door of the washing machine is closed.

[0052] Step 102: When the door of the washing machine is not closed, control the low voltage output;

[0053] The power supply includes two output modes of high voltage and low voltage, optional, low voltage includes 9 volt low voltage output, high voltage includes 310 volt high voltage output, when the washing machine door is not closed, just control the low voltage output, that is, control the power supply 30 output The low voltage of 9 volts, of...

Embodiment approach 2

[0064] see image 3 , image 3 It is a flow chart of the second switch self-checking method in the embodiment of the present invention, the method is applied to the washing machine, including:

[0065] Step 201: judging whether the door of the washing machine is closed;

[0066] Optionally, the self-inspection circuit is provided with a Meas_Door_Closed_ZK port, which monitors self-inspection signal fluctuations to determine whether the door of the washing machine is closed.

[0067] Step 202: When the door of the washing machine is not closed, control the low voltage output;

[0068] The power supply includes two output modes of high voltage and low voltage, optional, low voltage includes 9 volt low voltage output, high voltage includes 310 volt high voltage output, when the washing machine door is not closed, just control the low voltage output, that is, control the power output 9 As for the low voltage, of course, in the embodiment of the present invention, the volt valu...

Embodiment approach 3

[0087] see Figure 4 , Figure 4 It is a schematic structural diagram of a three-switch self-test device according to an embodiment of the present invention. The device 300 is applied to a washing machine and includes: a first judgment module 301, a first control module 302, a second control module 303, a first output module 304, a second A judgment module 305 , a second output module 306 , a third judgment module 307 , a third output module 308 , a fourth judgment module 309 and a fourth output module 310 .

[0088] The first judging module 301 is used to judge whether the door of the washing machine is closed;

[0089] The first control module 302 is used to control the low voltage output when the door of the washing machine is not closed;

[0090] The second control module 303 is used to control the high voltage output when the door of the washing machine is closed;

[0091] The first output module 304 is configured to output a pulse self-test signal when the door of the...

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Abstract

Embodiments of the present invention relate to the technical field of switch monitoring, and in particular to a method and device for self-test of a switch and a switch self-test system. The method comprises the steps of: determining whether a washing machine door is closed or not; controlling output of a low voltage when the washing machine door is not closed; when the washing machine door is closed, controlling output of a high voltage; outputting pulse self-test signals; determining whether complete pulse self-test signals are received or not; if not, obtaining a self-test result that a safety switch is not completely conducted, outputting a stop command and emitting early warning prompting information. Therefore, when the washing machine door is closed, the pulse self-test signals arecontinuously sent and it is determined whether the complete pulse self-test signals are received or not in real time, when the complete pulse self-test signals are not received, the faults of the safety switch are subjected to self-test, and more stable and more accurate self-test requirements are met.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of switch monitoring, in particular to a switch self-test method, device and switch self-test system. Background technique [0002] With the rapid development of science and technology and the national economy, smart home appliances such as washing machines have been rapidly popularized and applied. When the washing machine is working, the inner tub of the washing machine is rotating at high speed and charged with water. The safety switch of the washing machine ensures that when this button is pressed, The washer will stop spinning and will be completely de-energized. Therefore, once the safety switch fails, it will lead to accidents. [0003] Safety switch failures include poor contact of mechanical switch triggers, etc. At present, in order to solve the misjudgment caused by poor contact of mechanical switch triggers, non-contact sensors are used instead of switches. The main co...

Claims

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Application Information

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IPC IPC(8): G01R31/327G05B23/02
Inventor 李嘉承刘志勇
Owner SHENZHEN H&T INTELLIGENT CONTROL
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