Magnetron state detection method, device and equipment

A state detection, magnetron technology, applied in the direction of single semiconductor device testing, etc., can solve the problem of affecting the oscillation threshold voltage, the detection circuit ADC sampling rate and precision requirements are high, and it is easy to cause misjudgment or missed judgment, etc., to improve Reliability and robustness, improved state detection efficiency, and the effect of increased hardware costs
CN107632247BActive Publication Date: 2020-07-28GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG MIDEA KITCHEN APPLIANCES MFG CO LTD
Publication Date
2020-07-28

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Abstract

The invention discloses a magnetron state detection method, device and equipment. The method comprises steps that according to set sampling frequency, an anode current of a magnetron is acquired; based on data points of the acquired anode current, envelope of the anode current is drafted; according to the envelope, a state of the magnetron is detected. The method is advantaged in that the state ofthe magnetron can be determined according to envelope waveform of one sample period, and state detection efficiency is substantially improved.
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Description

technical field

[0001] The invention relates to the technical field of household appliances, in particular to a state detection method, device and equipment of a magnetron. Background technique

[0002] Abnormal operation of microwave ovens (such as no-load) is an abnormal working state, which will lead to safety hazards such as excessive temperature rise of the magnetron, microwave focusing and sparking in the cavity, which not only affects product reliability and life, but also threatens User Safety. Therefore, microwave oven anomaly detection technology is very important.

[0003] Currently, microwave anomaly detection technologies include:

[0004] (1) Abnormality detection is performed based on the collector-emitter voltage signal of the magnetron driving power supply transistor. When the microwave oven is unloaded, the temperature of the magnetron magnet will increase, resulting in a change in magnetism, thereby reducing the oscillation threshold voltage. When the ...

Claims

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