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Automatic zero-setting method in vibration frequency measurement

A technology of automatic zero adjustment and vibration frequency, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., it can solve the problems of measurement error and other problems, and achieve the effect of accurate zero adjustment and high reliability

Inactive Publication Date: 2013-02-13
KUNSHAN BEIJI PHOTOELECTRON SCI & TECH
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  • Summary
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Problems solved by technology

[0002] In the field of mechanical vibration measurement, the measurement of vibration frequency uses a vibration sensor to generate a frequency signal, and the frequency signal is measured to complete the measurement of the vibration frequency. However, this measurement method requires zeroing of the sensor signal, and inaccurate zeroing will cause errors in the measurement results. , therefore, an automatic zeroing method for vibration frequency measurement is essential

Method used

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  • Automatic zero-setting method in vibration frequency measurement

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing.

[0011] see figure 1 , the figure shows an automatic zeroing method for vibration frequency measurement, including input frequency Fin, reference frequency Fs, phase detector F, phase detector output signal Vo, low-pass filter and low-pass output DC signal vg, where :

[0012] The input frequency Fin and the reference frequency Fs are connected to the input terminal of the phase detector F, the phase detector output signal Vo is connected to the input of the low-pass filter, and the low-pass output DC signal Vg is output after low-pass filtering.

[0013] The phase detector F is an XOR logic phase detector, and the phase detector output signal Vo=Fs-Fin is a pulse signal. The low-pass output DC signal vg=(Fs-Fin)×K of the low-pass filter can adjust the voltage-controlled oscillation level and automatically generate zero-adjustment voltage.

[0014] The present invention h...

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Abstract

The invention discloses an automatic zero-setting method in vibration frequency measurement. The automatic zero-setting method comprises an input frequency Fin, a reference frequency Fs, a phase discriminator F, a phase discrimination output signal Vo, a low-pass filter and a low-pass output direct-current signal vg. By utilizing the automatic zero-setting method, the automatic zero setup can be carried out on the vibration frequency measurement, and thus the automatic zero-setting method has the characteristics of precise zero setup and high reliability.

Description

technical field [0001] The invention belongs to the field of mechanical vibration measurement, in particular to an automatic zeroing method for vibration frequency measurement. Background technique [0002] In the field of mechanical vibration measurement, the measurement of vibration frequency uses a vibration sensor to generate a frequency signal, and the frequency signal is measured to complete the measurement of the vibration frequency. However, this measurement method requires zeroing of the sensor signal, and inaccurate zeroing will cause errors in the measurement results. , therefore, an automatic zeroing method for vibration frequency measurement is essential. Contents of the invention [0003] The object of the present invention is to provide an automatic zeroing method for vibration frequency measurement. [0004] The technical solution to achieve the above purpose is: an automatic zeroing method for vibration frequency measurement, including input frequency Fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H11/06
Inventor 于星光
Owner KUNSHAN BEIJI PHOTOELECTRON SCI & TECH
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