Detector tester based on Goertzel transform algorithm and test method

A transformation algorithm and detection method technology, applied in the field of geophysical exploration, can solve the problems of high distortion and high production cost of the geophone, and achieve the effects of fast calculation speed, high accuracy and light weight

Inactive Publication Date: 2017-06-06
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] Based on the needs of reality and production practice, the applicant has invested a lot of money and long-term research to provide a geophone tester and test method based on the Goertzel transfor...

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  • Detector tester based on Goertzel transform algorithm and test method
  • Detector tester based on Goertzel transform algorithm and test method
  • Detector tester based on Goertzel transform algorithm and test method

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Embodiment Construction

[0035]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] The geophone tester based on the Goertzel transform algorithm provided by the present invention utilizes the DMA (direct memory access technology) of the single-chip microcomputer to directly read the stored standard sinusoidal signal look-up table to generate the required frequency sinusoidal signal, which is especially advantageous for the generation of low-frequency signals Obviously, through the current source architecture with low harmo...

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Abstract

The invention provides a detector tester based on a Goertzel transform algorithm and a test method. The method includes: directly reading a stored standard sinusoidal signal look-up table by employing the direct memory access (DMA) technology of a single-chip microcomputer, generating sinusoidal signals with the required frequency, and improving the measuring range and the accuracy of a parameter test of a detector through a current source structure with low harmonic distortion and high spectrum purity; measuring parameters of the detector by regarding digital sinusoidal frequency-sweeping signals as input, and directly measuring characteristics of the amplitude-frequency response and the phase-frequency response; and measuring real characteristics of the low frequency response of the detector through frequency spreading of the detector by employing a feedback circuit. According to the test technology of the detector, the test range is large, the precision is high, test indexes are reliable, the test speed is fast, and portability is achieved.

Description

technical field [0001] The invention belongs to the technical field of geophysical exploration, and relates to a geophone tester and a test method based on a Goertzel transformation algorithm, which is suitable for testing a geophone that picks up weak signals. Background technique [0002] The geophone is a kind of geophone widely used in geophysical exploration and seismic research. It picks up weak signals. The performance of the geophone is directly related to the quality of seismic data collection. The quality and design of subsequent acquisition circuits are very important. [0003] The existing geophone testers mostly use the DC excitation method and the sine frequency sweep electric excitation method when testing the natural frequency, sensitivity, damping ratio, DC resistance, dynamic resistance and other parameters of the geophone. The DC excitation method has a clear principle and a simple structure, and is suitable for small damping and low natural frequency det...

Claims

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Application Information

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IPC IPC(8): G01V13/00
Inventor 赵剑阳简逸芸游庆瑜徐锡强王肃静
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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