Load characteristic testing method and circuit

A technology of load characteristics and test methods, which is applied in the direction of continuity test, electrical measurement, short-circuit test, etc., can solve the problems of undetectable circuit abnormalities, complex methods, and inability to quickly detect load circuit load characteristics, so as to avoid equipment maintenance And the inconvenience of finding the problem, the method is simple, the effect of diagnosis and protection function is convenient

Pending Publication Date: 2022-05-31
深圳英恒电子有限公司
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Problems solved by technology

[0003] Existing methods usually only judge whether the load circuit is faulty by the absolute value of the output current or output voltage. When the load in the load circuit is connected incorrectly, it may still be judged that the load circuit is normal, and the abnormality of the circuit cannot be detected; or the existing test The method of load circuit characteristics needs to be calculated by establishing a load model. The method is complicated and cannot quickly detect the load characteristics of the load circuit.

Method used

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  • Load characteristic testing method and circuit
  • Load characteristic testing method and circuit

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Embodiment Construction

[0065] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0066] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the steps as sequential processing, many of the steps may be performed in parallel, concurrently, or simultaneously. Additionally, the order of steps may be rearranged. The process may be terminated when its operations are complete, but may also have additional steps not included in the figure. The ...

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Abstract

The embodiment of the invention discloses a load characteristic testing method and circuit. The method comprises the following steps: in a load characteristic test stage, controlling a main control switch to be in a conducting state, and acquiring voltage signals at two ends of a to-be-tested load and current signals flowing through the to-be-tested load at each moment in the load characteristic test stage; randomly selecting two different moments in a load characteristic test stage as a first moment and a second moment; determining a first equivalent impedance of the to-be-measured load according to the voltage signal and the current signal at the first moment, and determining a second equivalent impedance of the to-be-measured load according to the voltage signal and the current signal at the second moment; and according to the first equivalent impedance and the second equivalent impedance, determining load characteristics of the to-be-tested load. According to the technical scheme, the method is simple, and the load characteristics of the load circuit can be rapidly detected, so that the working efficiency is further improved, and the equipment can conveniently realize various diagnosis and protection functions.

Description

technical field [0001] Embodiments of the present invention relate to circuit testing technology, and in particular to a load characteristic testing method and circuit. Background technique [0002] With the intelligent development trend of the Industry 4.0 era and the continuous optimization and update of intelligent driving technology, the number of intelligent equipment in the industrial and automotive fields is increasing, and the demands for monitoring and safety are increasing. In the circuit system, it is particularly important to judge the characteristics of the load circuit. [0003] Existing methods usually only judge whether the load circuit is faulty by the absolute value of the output current or output voltage. When the load in the load circuit is connected incorrectly, it may still be judged that the load circuit is normal, and the abnormality of the circuit cannot be detected; or the existing test The method of load circuit characteristics needs to be calcula...

Claims

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Application Information

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IPC IPC(8): G01R31/28G01R31/54G01R31/52
CPCG01R31/2843G01R31/54G01R31/52
Inventor 刘少彬陈永丰李康刘沁文孟成
Owner 深圳英恒电子有限公司
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