Closed-loop digital acceleration detector harmonic distortion system and test method
A harmonic distortion and detector technology, which is used in the closed-loop digital acceleration detector harmonic distortion system and testing field, can solve the problem of not really measuring the harmonic distortion.
Inactive Publication Date: 2017-12-15
中石化石油工程技术服务有限公司 +2
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Problems solved by technology
Traditional measurement methods cannot really measure its harmonic distortion
In the traditional mechanical measurement method, the harmonic distortion of the measurement system itself is far greater than that of the closed-loop acceleration detector itself
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[0018] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0019] A closed-loop digital acceleration detector harmonic distortion system mentioned in the present invention has a technical solution: including a double-coil acceleration detector, a differential amplification and system processing unit, a feedback control unit, and a precision signal source unit, wherein the two-wire The circular acceleration detector is provided with two groups of coils, one group is used as a sensing coil, and the other group is used as a feedback control coil, the sensing coil is connected to the differential amplification and system processing unit, and the feedback control coil is connected to the feedback control unit; The differential am...
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The present invention relates to a closed-loop digital acceleration detector harmonic distortion system and a test method. The technical scheme of the invention is that the system comprises a double-coil acceleration detector, a differential amplification and system processing unit, a feedback control unit and a precise signal source unit. The double-coil acceleration detector is provided with two groups of coils, one group is a sensing coil, the other group is a feedback control coil, the sensing coil is connected to the differential amplification and system processing unit, and the feedback control coil is connected to the feedback control unit. The differential amplification and system processing unit comprises a sensing signal amplification and fourth-order integration processing circuit, and an output signal is sent to an output port of the detector. The feedback control unit superposes signals of the detector output port and a precise signal resource and then adds a feedback control signal to the feedback control coil. The system and the method have the advantages that through adding a designed high precision sine wave signal to the feedback control signal, the harmonic distortion above -120dB can be tested.
Description
technical field [0001] The invention relates to a closed-loop acceleration detector and a method thereof, in particular to a harmonic distortion system and a testing method of a closed-loop digital acceleration detector. Background technique [0002] The closed-loop acceleration detector has very good performance indicators, and the total harmonic distortion is below -100dB. Traditional measurement methods cannot really measure its harmonic distortion. In the traditional mechanical measurement method, the harmonic distortion of the measurement system itself is far greater than that of the closed-loop acceleration detector itself. [0003] In order to solve the problem of testing the harmonic distortion of the closed-loop acceleration detector, we have invented this brand-new testing method of harmonic distortion, which can test the harmonic distortion greater than -120dB. Contents of the invention [0004] The purpose of the present invention is to provide a closed-loop ...
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IPC IPC(8): G01V1/18G01V13/00
CPCG01V1/181G01V13/00
Inventor 王登云吴学兵赵永红陈都付振堂吴小兵张秋高翀付淼星
Owner 中石化石油工程技术服务有限公司