CN104502998B - Characteristic parameter tester and testing method for seismic detector - Google Patents
Characteristic parameter tester and testing method for seismic detector Download PDFInfo
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- CN104502998B CN104502998B CN201410776801.7A CN201410776801A CN104502998B CN 104502998 B CN104502998 B CN 104502998B CN 201410776801 A CN201410776801 A CN 201410776801A CN 104502998 B CN104502998 B CN 104502998B
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Abstract
The invention discloses a characteristic parameter tester and a testing method for a seismic detector, wherein the tester comprises a temperature sensor, a signal plate and a computer; the signal plate is internally provided with a signal acquisition card and a constant current source which are connected with each other; the temperature sensor is attached to the detector; the output end of the detector and the output end of the temperature sensor are both connected with the input end of the signal acquisition card; the output end of the signal acquisition card is connected with the input end of the computer; the output end of the computer is connected with the input end of the signal acquisition card; the output end of the signal acquisition card is connected with the input end of the constant current source; the output end of the constant current source is connected with the input end of the detector; the testing method comprises the following steps of employing a sine-sweep constant current excitation method to excite the detector, acquiring response signals of the detector, and obtaining characteristic parameters of the detector through an algorithm of calculating the real part of a frequency response function. According to the detector characteristic parameter tester and the testing method for the seismic detector, the measurement range of the characteristic parameters of the detector is widened, not only can the characteristic parameters of an underdamping detector be measured, but also the characteristic parameters of an overdamping detector be measured, and the precision and accuracy of a detector parameter test are improved.
Description
Technical field
The present invention relates to geophone characterisitic parameter technical field of measurement and test is and in particular to a kind of geophone characteristic is joined
Number tester and method of testing.
Background technology
Moving-coil seismic detector is a kind of wave detector being widely used in geophysical exploration and seismic study, and it is special
Property parameter accurately and be convenient for measuring for ensureing that survey data quality is particularly significant.
At present, both at home and abroad the instrument of moving-coil geophone characterisitic parameter is measured (as Sensor company based on electric excitation method
SMT series SMT-200, SMT-400 and some domestic dependence test instruments) be all method using continuous current excitation, that is, utilize
Relation between time-domain curve and each parameter solves every characteristic of wave detector, but this continuous current excitation method is suitable only for underdamping
The measurement of wave detector is it is impossible to for the big parameter testing damping wave detector, can measure wave detector limitednumber, and there is measurement essence
Degree is not high, and the bad shortcoming of multiple measurement reproducibility is it is therefore desirable to finding out a kind of new modal identification algorithm and developing and realize this
The tester planting algorithm, to improve measuring accuracy, is widened and can be measured wave detector species, improves the repeatability of repeatedly measurement.
Content of the invention
For the problem overcoming above-mentioned prior art to exist, it is an object of the invention to provide a kind of geophone characteristic
Parameter tester and method of testing, improve the measurement range of acceleration geophone parameter test, not only can measure underdamping wave detector
Characterisitic parameter, can also measure the characterisitic parameter of overdamp wave detector；Improve the accuracy and accurately of acceleration geophone parameter test
Degree.
In order to realize foregoing invention purpose, the present invention adopts the technical scheme that：
Geophone characterisitic parameter tester, including temperature sensor 2, signal plate 3 and computer 4, sets in signal plate 3
It is equipped with the data acquisition card 3-1 being connected and constant-current source 3-2, temperature sensor 2 is attached on wave detector 1, the output of wave detector 1
End and the output end of temperature sensor 2 are connected with the input of data acquisition card 3-1, the output end of data acquisition card 3-1 and
The input of computer 4 is connected, and the output end of computer 4 is connected with the input of data acquisition card 3-1, data acquisition card
The output end of 3-1 is connected with the input of constant-current source 3-2, and the output end of constant-current source 3-2 is connected with the input of wave detector 1
Connect.
Described temperature sensor 2 adopts PP1000 thermal resistance temperature sensor.
Described data acquisition card 3-1 adopts the M series data capture card of American National instrument NI company.
The method that geophone characterisitic parameter tester described above carries out geophone characteristic parameter testing, described meter
Calculation machine 4 exports sine sweep signal output to data acquisition card 3-1, and data acquisition card 3-1 is by the sine sweep collecting signal
Export to constant-current source 3-2, this sine sweep signal is converted to the sine sweep signal of constant amplitude by constant-current source 3-2, and should
To wave detector 1, wave detector 1 response sine sweep signal simultaneously outputs signal to signal and adopts the sine sweep signal output of constant amplitude
Truck 3-1, simultaneously temperature sensor 2 temperature signal of the wave detector collecting 1 is exported to data acquisition card 3-1, signal is adopted
Truck 3-1 exports this two paths of signals to computer 4, and computer 4 is by being calculated geophone characteristic parameter；Concrete calculating side
Method is as follows：
Step 1：Obtain first zero crossing of phase frequency curve by frequency response function (3), determine intrinsic frequency f0；
Wherein：H (f) is the frequency response function of wave detector, and f is frequency, and R is the series resistance of wave detector place circuit
Value, RcFor the D.C. resistance of wave detector, LcFor wave detector equivalent inductance, S0For wave detector open circuit sensitivity, f0Intrinsic for wave detector
Frequency, ζ0For the damping ratio of wave detector, M is the moving-coil quality of wave detector；
Step 2：The circuit being composed in series to wave detector 1 and resistance R is passed through direct current signal I, by measuring resistance R and detection
The magnitude of voltage at device 1 two ends, is expressed as UinAnd Uout, obtainThe i.e. DC resistance of wave detector 1；
Step 3：Take the real part of frequency response function (3), and ignore the impact of inductance, obtain formula (4)；
Work as f=f0When,
WhenWhen,
Make a=R Hre(f0)-Rc(7)
Obtain,
Order
Obtain,
First a, b value is obtained by frequency response function (3), byObtain the dampingratioζ of wave detector0, then
ByObtain the sensitivity S of wave detector0, dynamic electric resistor is defined as working as f=f0And ignore inspection during the impact of inductance
The resistance value of ripple device,Therefore dynamic electric resistor Rd=R H (f0)；
Obtain the characterisitic parameter of wave detector 1 by above-mentioned calculating process：Intrinsic frequency f0, DC resistance Rc, damping ratio
ζ0, open circuit sensitivity S0With dynamic electric resistor Rd.
Compared to the prior art the present invention, has the advantage that：
1) tester of the present invention improves the measurement range of acceleration geophone parameter test, not only can measure underdamping wave detector
Characterisitic parameter, can also measure the characterisitic parameter of overdamp wave detector；Improve the accuracy and accurately of acceleration geophone parameter test
Degree, to geophone tester than ever, measuring accuracy is higher, be repeated several times measurement result data beat amplitude small it is ensured that
The degree of accuracy of measurement；Geophone tester volume is less than ever, more portability.
2) method of testing of the present invention improves the identification range of acceleration geophone parameter recognizer, not only can identify underdamping
Geophone characteristic parameter, can also identify the characterisitic parameter of overdamp wave detector；Improve acceleration geophone parameter identification accuracy,
The degree of accuracy and speed, to geophone characteristic parameter identification method than ever, measuring accuracy is higher, and error is less, and speed is faster.
Brief description
Fig. 1 is the structural representation of tester of the present invention.
Fig. 2 is the circuit that wave detector and resistance R are composed in series, and is wave detector 1 between wherein CD.
Specific embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in figure 1, geophone characterisitic parameter tester of the present invention, including temperature sensor 2, signal plate 3 and meter
Calculation machine 4, is provided with the data acquisition card 3-1 being connected and constant-current source 3-2 in signal plate 3, temperature sensor 2 is attached to wave detector
On 1, the output end of the output end of wave detector 1 and temperature sensor 2 is connected with the input of data acquisition card 3-1, and signal is adopted
The output end of truck 3-1 is connected with the input of computer 4, the input of the output end of computer 4 and data acquisition card 3-1
It is connected, the output end of data acquisition card 3-1 is connected with the input of constant-current source 3-2, the output end of constant-current source 3-2 and detection
The input of device 1 is connected.
As the preferred embodiment of the present invention, described temperature sensor 2 adopts PP1000 thermal resistance temperature sensor, uses
In the environment temperature residing for measurement wave detector, by adding temperature-compensating, the parameter unification when pre-test is converted into 20 DEG C of temperature
Value under degree, thus eliminate the impact to acceleration geophone parameter for the temperature.
As the preferred embodiment of the present invention, described data acquisition card 3-1 adopts the M system of American National instrument NI company
Column data capture card.
As shown in Fig. 2 geophone characterisitic parameter tester of the present invention carries out geophone characteristic parameter testing
Method, described computer 4 exports sine sweep signal output to data acquisition card 3-1, and data acquisition card 3-1 will collect
This sine sweep signal is converted to the sine sweep of constant amplitude to constant-current source 3-2, constant-current source 3-2 by sine sweep signal output
Signal, and by the sine sweep signal output of this constant amplitude to wave detector 1, wave detector 1 response sine sweep signal simultaneously exports
Signal exports the temperature signal of the wave detector collecting 1 to signals collecting to data acquisition card 3-1, simultaneously temperature sensor 2
Card 3-1, data acquisition card 3-1 export this two paths of signals to computer 4, and computer 4 is by being calculated geophone characteristic ginseng
Number；Circular is as follows：
Step 1：Concatenate a resistance R to first wave detector 1, be a constant amplitude by constant-current source 3-2 control electric current I
Sine sweep signal, with the voltage signal U at resistance R two endsinAs input, the voltage signal U at wave detector 1 two endsoAs defeated
Go out, defining frequency response function is
In formula (1), E is the voltage at resistance R two ends, and E=I R is steady state value, ZCDFor the impedance of wave detector,
Wherein：F represents frequency, RcFor the D.C. resistance of wave detector, LcFor wave detector equivalent inductance, S0For wave detector open circuit
Sensitivity, f0For wave detector intrinsic frequency, ζ0For the damping ratio of wave detector, M is the moving-coil quality of wave detector.
Formula (2) is substituted into formula (1) and obtains frequency response function (3), phase frequency curve is obtained by frequency response function (3)
First zero crossing, determines intrinsic frequency f0；
Wherein：H (f) is the frequency response function of wave detector, and f is frequency, and R is the series resistance of wave detector place circuit
Value, RcFor the D.C. resistance of wave detector, LcFor wave detector equivalent inductance, S0For wave detector open circuit sensitivity, f0Intrinsic for wave detector
Frequency, ζ0For the damping ratio of wave detector, M is the moving-coil quality of wave detector；
Step 2：The circuit being composed in series to wave detector 1 and resistance R is passed through direct current signal I, by measuring resistance R and detection
The magnitude of voltage at device 1 two ends, is expressed as UinAnd Uout, obtainThe i.e. DC resistance of wave detector 1；
Step 3：Take the real part of frequency response function (3), and ignore the impact of inductance, obtain formula (4)；
Work as f=f0When,
WhenWhen,
Make a=R Hre(f0)-Rc(7)
Obtain,
Order
Obtain,
First a, b value is obtained by frequency response function (3), byObtain the dampingratioζ of wave detector0, then byObtain the sensitivity S of wave detector0, dynamic electric resistor is defined as working as f=f0And ignore inspection during the impact of inductance
The resistance value of ripple device,Therefore dynamic electric resistor Rd=R H (f0)；
Obtain the characterisitic parameter of wave detector 1 by above-mentioned calculating process：Intrinsic frequency f0, DC resistance Rc, damping ratio
ζ0, open circuit sensitivity S0With dynamic electric resistor Rd.
Claims (3)
1. the method that geophone characterisitic parameter tester carries out geophone characteristic parameter testing, described geophone characteristic
Parameter tester includes temperature sensor (2), signal plate (3) and computer (4), and signal plate is provided with, in (3), the letter being connected
Number capture card (3-1) and constant-current source (3-2), temperature sensor (2) is attached on wave detector (1), the output end of wave detector (1) and
The output end of temperature sensor (2) is connected with the input of data acquisition card (3-1), the output end of data acquisition card (3-1)
It is connected with the input of computer (4), the output end of computer (4) is connected with the input of data acquisition card (3-1), letter
The output end of number capture card (3-1) is connected with the input of constant-current source (3-2), the output end of constant-current source (3-2) and wave detector
(1) input is connected；
It is characterized in that：The method of described geophone characteristic parameter testing is as follows：
Described computer (4) exports sine sweep signal to data acquisition card (3-1), and data acquisition card (3-1) is by collect
This sine sweep signal is converted to the sine of constant amplitude to constant-current source (3-2), constant-current source (3-2) by sine sweep signal output
Frequency sweep constant current signal, and by the sine sweep constant current signal output of this constant amplitude to wave detector (1), wave detector (1) rings
Answer sine sweep signal and output signal to data acquisition card (3-1), temperature sensor (2) is by the wave detector collecting simultaneously
(1) temperature signal exports to data acquisition card (3-1), and data acquisition card (3-1) exports this two paths of signals to computer
(4), computer (4) is by being calculated geophone characteristic parameter；Circular is as follows：
Step 1：Obtain first zero crossing of phase frequency curve by frequency response function (3), determine intrinsic frequency f0；
Wherein：H (f) is the frequency response function of wave detector, and f is frequency, and R is the series impedance of wave detector place circuit, RcFor
The D.C. resistance of wave detector, LcFor wave detector equivalent inductance, S0For wave detector open circuit sensitivity, f0For wave detector intrinsic frequency, ζ0
For the damping ratio of wave detector, M is the moving-coil quality of wave detector；
Step 2：The circuit being composed in series to wave detector (1) and resistance R is passed through direct current signal I, by measuring resistance R and wave detector
(1) magnitude of voltage at two ends, is expressed as UinAnd Uout, obtainThe i.e. D.C. resistance of wave detector (1)
Value；
Step 3：Take the real part of frequency response function (3), and ignore the impact of inductance, obtain formula (4)；
Work as f=f0When,
WhenWhen,
Make a=R Hre(f0)-Rc(7)
Obtain,
Order
Obtain,
First a, b value is obtained by frequency response function (3), byObtain the dampingratioζ of wave detector0, then byObtain the sensitivity S of wave detector0, dynamic electric resistor is defined as working as f=f0And detection when ignoring the impact of inductance
The resistance value of device,Therefore dynamic electric resistor Rd=R H (f0)；
Obtain the characterisitic parameter of wave detector (1) by above-mentioned calculating process：Intrinsic frequency f0, DC resistance Rc, damping ratio
ζ0, open circuit sensitivity S0With dynamic electric resistor Rd.
2. method according to claim 1 it is characterised in that：Described temperature sensor (2) adopts PP1000 thermal resistance temperature
Degree sensor.
3. method according to claim 1 it is characterised in that：Described data acquisition card (3-1) adopts American National instrument
The M series data capture card of NI company.
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| CN201410776801.7A CN104502998B (en) | 2014-12-15 | 2014-12-15 | Characteristic parameter tester and testing method for seismic detector |
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| CN104502998B true CN104502998B (en) | 2017-02-22 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107153224B (en) * | 2016-03-02 | 2018-11-06 | 中石化石油工程技术服务有限公司 | Wave detector dynamic performance integrated test and evaluation method |
| CN107238872A (en) * | 2016-03-28 | 2017-10-10 | 中国石油化工股份有限公司 | seismic sensor test system and method |
| CN106338779A (en) * | 2016-08-23 | 2017-01-18 | 中国科学技术大学 | Portable high-precision moving-coil geophone performance test device and portable high-precision moving-coil geophone performance test method |
| CN106802436B (en) * | 2017-03-21 | 2019-10-25 | 中国科学院地质与地球物理研究所 | A kind of geophone tester and test method based on Goertzel transformation algorithm |
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| CN2129935Y (en) * | 1992-09-12 | 1993-04-14 | 张忠信 | Test device for earth-quake wave detector |
| CN1201911A (en) * | 1998-06-15 | 1998-12-16 | 西安石油学院 | Method and apparatus for certification of testing instrument for geophone |
| CN101840008A (en) * | 2009-03-18 | 2010-09-22 | 中国石油天然气集团公司 | Multifunctional seismic hydrophone tester |
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2014
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|---|---|---|---|---|
| CN2129935Y (en) * | 1992-09-12 | 1993-04-14 | 张忠信 | Test device for earth-quake wave detector |
| CN1201911A (en) * | 1998-06-15 | 1998-12-16 | 西安石油学院 | Method and apparatus for certification of testing instrument for geophone |
| CN101840008A (en) * | 2009-03-18 | 2010-09-22 | 中国石油天然气集团公司 | Multifunctional seismic hydrophone tester |
Non-Patent Citations (3)
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