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A detection device and method for cable level change

A level change and detection device technology, applied in the direction of measuring devices, measuring electrical variables, measuring current/voltage, etc., to achieve the effect of flexible programmability and good human-computer interaction characteristics

Active Publication Date: 2021-01-15
BEIJING MECHANICAL EQUIP INST
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Problems solved by technology

[0003] In view of the above analysis, the present invention aims to provide a detection method and device for cable level changes, to solve some or all of the deficiencies in existing testing methods, to test and record voltage output in a non-contact manner, Improve the sensitivity of voltage detection, improve the flexibility and ease of operation of the test, and reduce the purchase cost of test equipment

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  • A detection device and method for cable level change

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Embodiment Construction

[0032] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0033] Aiming at the deficiencies of the existing test methods, consider using the mobile phone to realize the function of measuring and displaying the voltage output sequence in a non-contact manner, and improve the flexibility and ease of operation of the test. The maximum operating voltage of the audio circuit of the mobile phone is 3V, the sampling width is 16bit, the resolution reaches 3 / 2e16=45.7μV, and the maximum sampling rate is 48000bps.

[0034] A specific embodiment of the present invention, such as figure 1 As shown, a detection device for cable level changes is disclosed, includ...

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Abstract

The invention relates to a detection device and method of cable level change, and belongs to the technical field of the voltage signal measurement. The device comprises a mobile phone, a microphone cord of a pair of headphone, and signal collection reduction software installed in the mobile phone; the mobile phone comprises an audio module; the microphone cord is used as a test antenna to form a coupling capacitor by combining with the tested cable, thereby receiving the coupling voltage, and is used for transmitting the coupling voltage to the audio module to obtain an audio file; the signalcollection reduction software is installed in the mobile phone and used for reducing the audio file to obtain tested waveform. The technical scheme disclosed by the invention solves the problem that the prior art is low in test sensitivity, inconvenient to carry, and bad in data processing flexibility by taking the mobile phone as a carrier, and the equipment acquisition cost is reduced at the same time.

Description

technical field [0001] The invention relates to the technical field of voltage signal measurement, in particular to a detection device and method for cable level changes. Background technique [0002] At present, the non-contact measurement of the cable voltage signal generally uses a detection pen or a special three-purpose meter. Among them, the detection pen cannot quantitatively detect the voltage; the three-purpose meter cannot record the waveform of the voltage change; using the oscilloscope, the principle of capacitive coupling can be used to test the waveform of the voltage sequence in a non-contact manner, but the resolution of the oscilloscope is mostly around 0.1v. The resolution is not high enough for detecting the coupling voltage, and the measured voltage needs to be calculated according to the coupling waveform, so there are problems in ease of use and portability. Contents of the invention [0003] In view of the above analysis, the present invention aims ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/25
CPCG01R19/2503G01R19/2506G01R19/2509
Inventor 李子伟杨文翰葛文韬
Owner BEIJING MECHANICAL EQUIP INST
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