CN105509871A - Self-calibration device and method applied to vibration sensor - Google Patents

Abstract

The invention discloses a self-calibration device applied to a vibration sensor. The self-calibration device comprises a signal generator, an operational amplifier, a signal measuring module and a signal processing module. The output end of the signal generator is connected with the normal phase input end of the operational amplifier. The output end of the operational amplifier is connected with the input end of the vibration sensor to be detected. The input end of the signal measuring module is connected with the output end of the vibration sensor to be detected, and output voltage signals of the vibration sensor to be detected are transmitted to the signal processing module. A self-detection coil of the vibration sensor to be detected and the other input end of the signal measuring module are connected with the reverse phase input end of the operational amplifier. By means of the self-calibration device applied to the vibration sensor, the influence of coupling inductance on the output voltage signals of the vibration sensor to be detected is eliminated, and the measured output voltage signals are more accurate; in addition, calibration can be achieved on a working site, and the device is simple in structure and easy to carry. The invention further provides a self-calibration method applied to the vibration sensor.

Description

A kind of be applied to vibration transducer from calibrating installation and from calibration method

Technical field

The present invention relates to vibration measurement calibration field, particularly relate to a kind of be applied to vibration transducer from calibrating installation and from calibration method.

Background technology

Vibration transducer, as the surveying instrument of Engineering Vibration amount, is widely used in every field; Especially based on the magneto-electric vibration transducer of magnetic induction principle, the attention of more and more people is subject to because it movement velocity of input can be transformed into the electric signal that is easy to measure.Measuring coil and alignment coil is typically provided with in magneto-electric vibration transducer; Described measuring coil is equivalent to a resistance; Described alignment coil is equivalent to the series connection of inductance and resistance, and this inductance is a coupling inductance; The vibration signal of the voltage that this magneto-electric vibration transducer exports and its actual measurement meets following formula:

$\frac{e}{s^{2}y}=\frac{-Gs}{W_1{W}_2+W_3}$

W ₁＝(s ²+2Dns+n ²)

$W_2=(R_{s}Cs+1+\frac{R_s}{R})$

$W_3=\frac{G^2}{mR}(RCs+1)s$

$n^2=\frac{k}{m}$

$2Dn=\frac{b}{m}$

In formula, e represents the magnitude of voltage that magneto-electric vibration transducer exports, unit symbol: V; Y represents the vibration displacement signal of magneto-electric vibration transducer actual measurement, unit symbol: mm; G represents the measuring coil electromechanical coupling numerical value of magneto-electric vibration transducer; S represents Laplace operator; B represents the damping ratio of magneto-electric vibration transducer; M represents the quality of magneto-electric vibration transducer moving part; R _srepresent the measuring coil internal resistance of magneto-electric vibration transducer, unit symbol: Ω; C represents magneto-electric vibration transducer feedback network equivalent capacitance value, unit symbol: F; R represents the stake resistance of magneto-electric vibration transducer inside, unit symbol: Ω; K represents the elastic element rigidity of magneto-electric vibration transducer.

Therefore, the voltage exported by measuring magneto-electric vibration transducer gets final product indirect inspection and obtains Engineering Vibration physical quantity, directly perceived, convenient, fast.But after magneto-electric vibration transducer uses a period of time, its signal measured will become no longer accurate, now then needs to examine and determine magneto-electric vibration transducer.

The calibrating of existing magneto-electric vibration transducer is mostly the method based on laboratory, namely needs magneto-electric vibration transducer to disassemble to deliver to laboratory and detect.And a large amount of magneto-electric vibration transducers is arranged on test site throughout the year, and be in online monitoring state, cannot pull down and deliver to laboratory and detect.Such as, China's seismic network has ultra broadband seismometer 20, very broad-band teleseismic meter 125, regional earthquake platform net has very broad-band teleseismic meter 44, broad-band teleseismic meter 628, short period seismometer 120, some arrays and volcanic earthquake platform net are furnished with 51 seismometers, separately have flowing Digital Seismic Network to be furnished with 800 cover seismic instruments; Seismic system and other department and enterprise have laid more than 2000 the strong vibration observation station in the engineering structures such as free survey stations and buildings, bridge, dam, be laid with three-dimensional accelerometer and the registering instrument of various model, also have the mobile observation equipment of hundreds in addition.In these engineering vibration measuring fields, the health detection of engineering structure, the Real-Time Monitoring etc. of plant equipment all require that these vibration transducers continually for a long time must be in online detected state, are difficult to deliver to laboratory and detect.

In addition, when magneto-electric vibration transducer being examined and determine in laboratory, usually input standard voltage signal to examine and determine directly in magneto-electric vibration transducer to be measured, the state of magneto-electric vibration transducer to be measured is examined and determine again by the ratio of the normal voltage calculating voltage that magneto-electric vibration transducer exports and its input, concrete, the normal voltage of the voltage that magneto-electric vibration transducer to be measured exports and input meets following formula:

$\frac{e}{u}=\frac{{\mathrm{GG}}_{2}s}{(W_4{W}_1+{G_2}^{2}s)W_2+W_3{W}_4}$

W ₄＝m(R _s2+L ₂s)

In formula, e represents the magnitude of voltage that magneto-electric vibration transducer exports, unit symbol: V; U represents the normal voltage that magneto-electric vibration transducer inputs, unit symbol: V; R _s2represent the alignment coil internal resistance value of magneto-electric vibration transducer, unit symbol: Ω; L ₂represent the equivalent inductance of the alignment coil of magneto-electric vibration transducer, unit symbol: H.

As shown from the above formula, the voltage that magneto-electric vibration transducer to be measured exports is relevant with the equivalent inductance of the ratio of the normal voltage of input and the alignment coil of sensor, and due to this equivalent inductance be a coupling inductance, when changing the standard voltage signal of input, this coupling inductance also can change, and then the output voltage of vibration transducer to be measured measured is changed even no longer meet above-mentioned formula, thus have impact on the accuracy of calibrating.Therefore, how accurately to determine whether magneto-electric vibration transducer is in normal duty, be that engineering circles has problem to be solved always.

Summary of the invention

The invention reside in the shortcoming that overcomes prior art with not enough, provide a kind of be applied to vibration transducer from calibrating installation, it, without the need to vibration transducer to be measured is transferred to laboratory, can realize accurate calibrating in working site.

The present invention is achieved by the following technical solutions: a kind of be applied to vibration transducer from calibrating installation, comprise signal generator, operational amplifier, signal measurement module and signal processing module; The output terminal of described signal generator is connected with the normal phase input end of described operational amplifier; The output terminal of described operational amplifier is connected with the input end of vibration transducer to be measured; The input end of described signal measurement module is connected with the output terminal of vibration transducer to be measured, and the voltage signal that vibration transducer to be measured exports is sent to described signal processing module; The Autonomous test coil of vibration transducer to be measured is connected with the inverting input of described operational amplifier, the reverse inter-input-ing ending grounding of described operational amplifier; Another input end of described signal measurement module is connected with the inverting input of operational amplifier, and the standard voltage signal of measurement is sent to described signal processing module.

Compared to prior art, the sine voltage signal that signal generator exports is converted to current signal by operational amplifier by the present invention, and be input in vibration transducer to be measured with the form of steady current, eliminate the impact that coupling inductance treats the output voltage signal of vibration measuring dynamic sensor, make the output voltage signal of the vibration transducer to be measured of measurement more accurate, and then ensure that the accuracy of calibrating; And provided by the invention from calibrating installation without the need to vibration transducer to be measured is transferred to laboratory verification, calibrating can be realized in working site, structure is simple, be easy to carry.

Further, described signal measurement module is a data collecting card with multiple input/output port.

Further, described signal generator is a DA chip.

Further, when vibration transducer to be measured is in speed threshold, the normal voltage of the voltage that vibration transducer to be measured exports and signal generator output is proportional and satisfied:

$\frac{e}{u}=\frac{{\mathrm{GG}}_2}{Rm}\frac{s}{W_1{W}_2+W_3}$

W ₁＝(s ²+2Dns+n ²)

$W_2=(R_{s}Cs+1+\frac{R_s}{R})$

$W_3=\frac{G^2}{mR}(RCs+1)s$

$n^2=\frac{k}{m}$

$2Dn=\frac{b}{m}$

In formula, e represents the magnitude of voltage that vibration transducer to be measured exports, unit symbol: V; U represents the standard voltage value that signal generator exports, unit symbol: V; G represents the measuring coil electromechanical coupling numerical value of vibration transducer to be measured; G ₂represent the alignment coil electromechanical coupling numerical value of vibration transducer to be measured; R represents the grounding resistance of vibration transducer to be measured, unit symbol: Ω; M represents the quality of vibration transducer moving part to be measured, unit symbol: kg; S represents Laplace operator; B represents the damping ratio of vibration transducer to be measured; C represents vibration transducer feedback network equivalent capacitance value to be measured, unit symbol: F; K represents the elastic element rigidity of vibration transducer to be measured, unit symbol: N/m; R _srepresent the measuring coil internal resistance of vibration transducer to be measured, unit symbol: Ω.

Further, when vibration transducer to be measured is in speed threshold, the voltage that vibration transducer to be measured exports and the normal voltage that signal generator exports meet:

$f\×\frac{e^{\′}}{u^{\′}}=\frac{f\×{\mathrm{GG}}_2}{Rm}\frac{s}{W_1{W}_2+W_3}$

In formula, the calibration frequency that f signal generator exports, unit symbol: Hz; When u ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the normal voltage that signal generator exports, unit symbol: V; When e ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the voltage that vibration transducer to be measured exports, unit symbol: V.

The present invention also provide a kind of be applied to vibration transducer from calibration method, comprise the steps:

Step 1: arrange an operational amplifier be connected with signal generator output terminal, is input to be measured vibration transducer in after converting the standard voltage signal that signal generator exports to current signal by this operational amplifier;

Step 2: obtain the voltage signal of vibration transducer to be measured output and the standard voltage signal of signal generator output, and judge the performance state of vibration transducer to be measured with the ratio both this.

Compared to prior art, the sine voltage signal that signal generator exports is converted to current signal by operational amplifier by the present invention, and be input in vibration transducer to be measured with the form of steady current, eliminate the impact that coupling inductance treats the output voltage signal of vibration measuring dynamic sensor, make the output voltage signal of the vibration transducer to be measured of measurement more accurate, and then ensure that the accuracy of calibrating; And provided by the invention from calibrating installation without the need to vibration transducer to be measured is transferred to laboratory verification, calibrating can be realized in working site, structure is simple, be easy to carry.

In order to understand better and implement, describe the present invention in detail below in conjunction with accompanying drawing.

Accompanying drawing explanation

Fig. 1 is the theory diagram from calibrating installation that the present invention is applied to vibration transducer;

Fig. 2 is the process flow diagram from calibration method that the present invention is applied to vibration transducer.

Embodiment

What the present embodiment provided be applied to vibration transducer from calibrating installation be mainly adapted to based on magnetic induction principle magneto-electric vibration transducer as vibro-pickup from calibrating, but be not limited to the Autonomous test of magneto-electric vibration transducer.Usual vibration transducer has speed threshold and acceleration shelves two gears, exports vibration velocity or acceleration voltage signal respectively; The vibration transducer that the present invention can realize being in different gear is examined and determine.

Refer to Fig. 1, it is the theory diagram from calibrating installation that the present invention is applied to vibration transducer.What this was applied to vibration transducer comprises signal generator, operational amplifier, signal measurement module and signal processing module from calibrating installation.The output terminal of described signal generator is connected with the normal phase input end of described operational amplifier; The output terminal of described operational amplifier is connected with the input end of vibration transducer to be measured, and the current signal of output is sent to vibration transducer to be measured; The input end of described signal measurement module is connected with the output terminal of vibration transducer to be measured, and the voltage signal that vibration transducer to be measured exports is sent to described signal processing module.The Autonomous test coil of vibration transducer to be measured is connected with the inverting input of described operational amplifier, the reverse inter-input-ing ending grounding of described operational amplifier; Another input end of described signal measurement module is connected with the inverting input of operational amplifier, and the standard voltage signal of measurement is sent to described signal processing module.Described signal processing module judges the performance state of vibration transducer to be measured by the ratio of standard voltage signal of the voltage that calculates vibration transducer to be measured and export and input.

In the present embodiment, what described signal generator exported is the sinusoidal signal consistent with national standard.

Because the anti-phase input terminal voltage of described operational amplifier is with input terminal voltage is identical in the same way, therefore, the voltage of the operational amplifier inverting input of another input end reception of described signal measurement module is the normal voltage that signal generator exports.

Concrete, when the speed stage at vibration transducer to be measured is examined and determine, when vibration transducer to be measured is in speed threshold, the normal voltage of the voltage that vibration transducer to be measured exports and signal generator output is proportional and satisfied:

$\frac{e}{u}=\frac{{\mathrm{GG}}_2}{Rm}\frac{s}{W_1{W}_2+W_3}$

W ₁＝(s ²+2Dns+n ²)

$W_2=(R_{s}Cs+1+\frac{R_s}{R})$

$W_3=\frac{G^2}{mR}(RCs+1)s$

$n^2=\frac{k}{m}$

$2Dn=\frac{b}{m}$

In formula, e represents the magnitude of voltage that vibration transducer to be measured exports, unit symbol: V; U represents the standard voltage value that signal generator exports, unit symbol: V; G represents the measuring coil electromechanical coupling numerical value of vibration transducer to be measured; G ₂represent the alignment coil electromechanical coupling numerical value of vibration transducer to be measured; R represents the grounding resistance of vibration transducer to be measured, unit symbol: Ω; M represents the quality of vibration transducer moving part to be measured, unit symbol: kg; S represents Laplace operator; B represents the damping ratio of vibration transducer to be measured; C represents vibration transducer feedback network equivalent capacitance value to be measured, unit symbol: F; K represents the elastic element rigidity of vibration transducer to be measured, unit symbol: N/m; R _srepresent the measuring coil internal resistance of vibration transducer to be measured, unit symbol: Ω.

When vibration transducer to be measured is in speed threshold, the voltage that vibration transducer to be measured exports and the normal voltage that signal generator exports meet:

$f\×\frac{e^{\′}}{u^{\′}}=\frac{f\×{\mathrm{GG}}_2}{Rm}\frac{s}{W_1{W}_2+W_3}$

In formula, the calibration frequency that f signal generator exports, unit symbol: Hz; When u ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the normal voltage that signal generator exports, unit symbol: V; When e ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the voltage that vibration transducer to be measured exports, unit symbol: V.

Described signal measurement module is a data collecting card with multiple input/output port.Described signal generator is a DA chip.

In the present embodiment, the output terminal of described operational amplifier can be connected with the input end of multiple vibration transducer to be measured, and the output terminal of the plurality of vibration transducer to be measured is connected with multiple input ends of described signal measurement module respectively; Multiple output terminals of described signal measurement module are connected with described signal processing module respectively, and then realize the calibrating to multiple vibration transducer to be measured.

The present embodiment, to measure three vibration transducers to be measured simultaneously, defines for the relative sensitivity of vibration transducer to be measured, when the operation range of vibration transducer to be measured is in speed threshold, then the relative sensitivity A of these three vibration transducers to be measured ₁, A ₂and A ₃meet respectively:

$A_1=\frac{e_1}{u};$

$A_2=\frac{e_2}{u};$

$A_3=\frac{e_3}{u};$

In formula, u represents the standard voltage value that signal generator exports, unit symbol: V; e ₁, e ₂, e ₃represent the magnitude of voltage that three vibration transducers to be measured export respectively, unit symbol: V.

When the operation range of vibration transducer to be measured is in acceleration shelves, then the relative sensitivity A of these three vibration transducers to be measured ₁', A ₂' and A ₃' meet respectively:

$A_1^{\′}=\frac{f\×{e_1}^{\′}}{u^{\′}};$

$A_2^{\′}=\frac{f\×{e_2}^{\′}}{u^{\′}};$

$A_3^{\′}=\frac{f\×{e_3}^{\′}}{u^{\′}};$

In formula, f is the calibration frequency that signal generator sends, unit symbol: Hz; When u ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the standard voltage value that signal generator exports, unit symbol: V; e ₁', e ₂', e ₃' when representing that the operation range of vibration transducer to be measured is in acceleration shelves respectively, the magnitude of voltage that three vibration transducers to be measured export, unit symbol: V.

Compared to prior art, the sine voltage signal that signal generator exports is converted to current signal by operational amplifier by the present invention, and be input in vibration transducer to be measured with the form of steady current, eliminate the impact that coupling inductance treats the output voltage signal of vibration measuring dynamic sensor, make the output voltage signal of the vibration transducer to be measured of measurement more accurate, and then ensure that the accuracy of calibrating; And provided by the invention from calibrating installation without the need to vibration transducer to be measured is transferred to laboratory verification, calibrating can be realized in working site, structure is simple, be easy to carry.

The present invention also provide simultaneously a kind of be applied to vibration transducer from calibration method, refer to Fig. 2, it is the process flow diagram from calibration method that the present invention is applied to vibration transducer.This is applied to comprising the steps: from calibration method of vibration transducer

Step 1: arrange an operational amplifier be connected with signal generator output terminal, is input to be measured vibration transducer in after converting the standard voltage signal that signal generator exports to current signal by this operational amplifier;

Step 2: obtain the voltage signal of vibration transducer to be measured output and the standard voltage signal of signal generator output, and judge the performance state of vibration transducer to be measured with the ratio both this.

In step 1, what described signal generator exported is the sinusoidal signal consistent with national standard.Described signal measurement module is a data collecting card with Multiinputoutput end.Described signal generator is a DA chip.

In step 2, a signal measurement module be connected with the output terminal of vibration transducer to be measured and the inverting input of operational amplifier is respectively set; And a signal processing module be connected with signal measurement module output terminal is set.Obtain the voltage signal of vibration transducer to be measured output and the standard voltage signal of signal generator output by described signal measurement module, and be sent to described signal processing module; The voltage signal that the vibration transducer to be measured that described signal processing module Received signal strength measurement module transmits exports and the standard voltage signal that signal generator exports, and the ratio both calculating judges the performance state of vibration transducer to be measured.

When the speed stage at vibration transducer to be measured is examined and determine, when vibration transducer to be measured is in speed threshold, the normal voltage of the voltage that vibration transducer to be measured exports and signal generator output is proportional and satisfied:

$\frac{e}{u}=\frac{{\mathrm{GG}}_2}{Rm}\frac{s}{W_1{W}_2+W_3}$

W ₁＝(s ²+2Dns+n ²)

$W_2=(R_{s}Cs+1+\frac{R_s}{R})$

$W_3=\frac{G^2}{mR}(RCs+1)s$

$n^2=\frac{k}{m}$

$2Dn=\frac{b}{m}$

In formula, e represents the magnitude of voltage that vibration transducer to be measured exports, unit symbol: V; U represents the standard voltage value that signal generator exports, unit symbol: V; G represents the measuring coil electromechanical coupling numerical value of vibration transducer to be measured; G ₂represent the alignment coil electromechanical coupling numerical value of vibration transducer to be measured; R represents the grounding resistance of vibration transducer to be measured, unit symbol: Ω; M represents the quality of vibration transducer moving part to be measured, unit symbol: kg; S represents Laplace operator; B represents the damping ratio of vibration transducer to be measured; C represents vibration transducer feedback network equivalent capacitance value to be measured, unit symbol: F; K represents the elastic element rigidity of vibration transducer to be measured, unit symbol: N/m; R _srepresent the measuring coil internal resistance of vibration transducer to be measured, unit symbol: Ω.

When vibration transducer to be measured is in speed threshold, the voltage that vibration transducer to be measured exports and the normal voltage that signal generator exports meet:

$f\×\frac{e^{\′}}{u^{\′}}=\frac{f\×{\mathrm{GG}}_2}{Rm}\frac{s}{W_1{W}_2+W_3}$

In formula, the calibration frequency that f signal generator exports, unit symbol: Hz; When u ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the normal voltage that signal generator exports, unit symbol: V; When e ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the voltage that vibration transducer to be measured exports, unit symbol: V.

In the present embodiment, the output terminal of described operational amplifier can be connected with the input end of multiple vibration transducer to be measured, and the output terminal of the plurality of vibration transducer to be measured is connected with multiple input ends of described signal measurement module respectively; Multiple output terminals of described signal measurement module are connected with described signal processing module respectively, and then realize the calibrating to multiple vibration transducer to be measured.

Compared to prior art, the sine voltage signal that signal generator exports is converted to current signal by operational amplifier by the present invention, and be input in vibration transducer to be measured with the form of steady current, eliminate the impact that coupling inductance treats the output voltage signal of vibration measuring dynamic sensor, make the output voltage signal of the vibration transducer to be measured of measurement more accurate, and then ensure that the accuracy of calibrating; And provided by the invention from calibration method without the need to vibration transducer to be measured is transferred to laboratory verification, calibrating can be realized in working site, structure is simple, be easy to carry.

The present invention is not limited to above-mentioned embodiment, if do not depart from the spirit and scope of the present invention to various change of the present invention or distortion, if these are changed and distortion belongs within claim of the present invention and equivalent technologies scope, then the present invention is also intended to comprise these changes and distortion.

Claims (10)

1. be applied to vibration transducer from a calibrating installation, it is characterized in that: comprise signal generator, operational amplifier, signal measurement module and signal processing module; The output terminal of described signal generator is connected with the normal phase input end of described operational amplifier; The output terminal of described operational amplifier is connected with the input end of vibration transducer to be measured; The input end of described signal measurement module is connected with the output terminal of vibration transducer to be measured, and the voltage signal that vibration transducer to be measured exports is sent to described signal processing module; The Autonomous test coil of vibration transducer to be measured is connected with the inverting input of described operational amplifier, the reverse inter-input-ing ending grounding of described operational amplifier; Another input end of described signal measurement module is connected with the inverting input of operational amplifier, and the standard voltage signal of measurement is sent to described signal processing module.

2. according to claim 1 be applied to vibration transducer from calibrating installation, it is characterized in that: described signal measurement module is a data collecting card with multiple input/output port.

3. according to claim 1 be applied to vibration transducer from calibrating installation, it is characterized in that: described signal generator is a DA chip.

4. according to claim arbitrary in claim 1-3 be applied to vibration transducer from calibrating installation, it is characterized in that: when vibration transducer to be measured is in speed threshold, the normal voltage of the voltage that vibration transducer to be measured exports and signal generator output is proportional and satisfied:

$\frac{e}{u}=\frac{{\mathrm{GG}}_2}{Rm}\frac{s}{W_1{W}_2+W_3}$

W ₁＝(s ²+2Dns+n ²)

$W_2=(R_{s}Cs+1+\frac{R_s}{R})$

$W_3=\frac{G^2}{mR}(RCs+1)s$

$n^2=\frac{k}{m}$

$2Dn=\frac{b}{m}$

In formula, e represents the magnitude of voltage that vibration transducer to be measured exports, unit symbol: V; U represents the standard voltage value that signal generator exports, unit symbol: V; G represents the measuring coil electromechanical coupling numerical value of vibration transducer to be measured; G ₂represent the alignment coil electromechanical coupling numerical value of vibration transducer to be measured; R represents the grounding resistance of vibration transducer to be measured, unit symbol: Ω; M represents the quality of vibration transducer moving part to be measured, unit symbol: kg; S represents Laplace operator; B represents the damping ratio of vibration transducer to be measured; C represents vibration transducer feedback network equivalent capacitance value to be measured, unit symbol: F; K represents the elastic element rigidity of vibration transducer to be measured, unit symbol: N/m; R _srepresent the measuring coil internal resistance of vibration transducer to be measured, unit symbol: Ω.

5. according to claim arbitrary in claim 1-3 be applied to vibration transducer from calibrating installation, it is characterized in that:

When vibration transducer to be measured is in speed threshold, the voltage that vibration transducer to be measured exports and the normal voltage that signal generator exports meet:

$f\×\frac{e^{\′}}{u^{\′}}=\frac{f\×{\mathrm{GG}}_2}{Rm}\frac{s}{W_1{W}_2+W_3}$

In formula, the calibration frequency that f signal generator exports, unit symbol: Hz; When u ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the normal voltage that signal generator exports, unit symbol: V; When e ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the voltage that vibration transducer to be measured exports, unit symbol: V.

6. be applied to vibration transducer from a calibration method, it is characterized in that: comprise the steps:

Step 1: arrange an operational amplifier be connected with signal generator output terminal, is input to be measured vibration transducer in after converting the standard voltage signal that signal generator exports to current signal by this operational amplifier;

Step 2: obtain the voltage signal of vibration transducer to be measured output and the standard voltage signal of signal generator output, and judge the performance state of vibration transducer to be measured with the ratio both this.

7. according to claim 6 be applied to vibration transducer from calibration method, it is characterized in that: in step 2, when vibration transducer to be measured is in speed threshold, the normal voltage of the voltage that vibration transducer to be measured exports and signal generator output is proportional and satisfied:

$\frac{e}{u}=\frac{{\mathrm{GG}}_2}{Rm}\frac{s}{W_1{W}_2+W_3}$

W ₁＝(s ²+2Dns+n ²)

$W_2=(R_{s}Cs+1+\frac{R_s}{R})$

$W_3=\frac{G^2}{mR}(RCs+1)s$

$n^2=\frac{k}{m}$

$2Dn=\frac{b}{m}$

In formula, e represents the magnitude of voltage that vibration transducer to be measured exports, unit symbol: V; U represents the standard voltage value that signal generator exports, unit symbol: V; G represents the measuring coil electromechanical coupling numerical value of vibration transducer to be measured; G ₂represent the alignment coil electromechanical coupling numerical value of vibration transducer to be measured; R represents the grounding resistance of vibration transducer to be measured, unit symbol: Ω; M represents the quality of vibration transducer moving part to be measured, unit symbol: kg; S represents Laplace operator; B represents the damping ratio of vibration transducer to be measured; C represents vibration transducer feedback network equivalent capacitance value to be measured, unit symbol: F; K represents the elastic element rigidity of vibration transducer to be measured, unit symbol: N/m; R _srepresent the measuring coil internal resistance of vibration transducer to be measured, unit symbol: Ω.

8. according to claim 6 be applied to vibration transducer from calibration method, it is characterized in that: when vibration transducer to be measured is in speed threshold, the voltage that vibration transducer to be measured exports and the normal voltage that signal generator exports meet:

$f\×\frac{e^{\′}}{u^{\′}}=\frac{{\mathrm{GG}}_2}{Rm}\frac{s}{W_1{W}_2+W_3}$

In formula, the calibration frequency that f signal generator exports, unit symbol: Hz; When u ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the normal voltage that signal generator exports, unit symbol: V; When e ' represents that the operation range of vibration transducer to be measured is in acceleration shelves, the voltage that vibration transducer to be measured exports, unit symbol: V.

9. according to claim arbitrary in claim 6-8 be applied to vibration transducer from calibration method, it is characterized in that: in step 2, a signal measurement module be connected with the output terminal of vibration transducer to be measured and the inverting input of operational amplifier is respectively set; The voltage signal of vibration transducer to be measured output and the standard voltage signal of signal generator output is obtained by described signal measurement module.

10. according to claim 9 be applied to vibration transducer from calibration method, it is characterized in that: in step 2, a signal processing module be connected with signal measurement module output terminal be set; The normal voltage that the voltage of the vibration transducer output to be measured of described signal processing module Received signal strength measurement module conveying and signal generator export, and the ratio both calculating judges the performance state of vibration transducer to be measured.