CN102681029A - Detector parameter testing device and method - Google Patents

Abstract

The invention relates to a detector parameter testing device and method, which solve the technical problem that the traditional tester is incapable of testing parameters of a damping detector. The detector parameter testing device comprises a control and operation processing device, an A/D (Analog/Digital) and D/A (Digital/Analog) acquisition module, a filtering drive module, a tester and a vibration isolation device. The detector parameter testing method comprises the following steps of: providing a step signal to the detector; then collecting a step response signal of the detector, and calculating a damping coefficient, natural frequency, sensitivity and resistance; and then providing a sine signal, and acquiring a sine response signal of the detector and calculating the distortion degree. The detector parameter testing device and method can be widely applied to parameter detection of the detector.

Description

A kind of acceleration geophone parameter proving installation and method of testing

Technical field

The present invention relates to a kind of sensor parameters proving installation and method of testing, is a kind of acceleration geophone parameter proving installation and method of testing specifically.

Background technology

At present; The seismoreceiver that petroleum exploration field uses is generally the wave detector of relative damping factor ζ＜1; This wave detector is the underdamping seismoreceiver, and main at present employing SMT200 tester is tested parameters, and the SMT200 tester can only be tested the parameter of little damping wave detector.Along with the further growth requirement of petroleum prospecting; The overdamping seismoreceiver that has occurred relative damping factor ζ＞1 again; The response function of this overdamping seismoreceiver is unimodal, has the interference of the tailed peak of fluctuation up and down in the echoed signal when having avoided adopting conventional seismoreceiver, is particularly conducive to and differentiates thin geology layering; Adopted by more and more users; But because the response function of this overdamping seismoreceiver is unimodal, present SMT200 tester can't be accomplished the parameter testing of this overdamping seismoreceiver, especially the test of ratio of damping and frequency; Therefore, overdamping wave detector parameters testing research is also received attention widely.Press for develop have the high high conformity of measuring accuracy, reliable and stablely have that compact conformation, volume are little, in light weight, under the field working conditions easy to use flexibly, the tester of advantage such as low price.

Summary of the invention

The present invention can't realize the technical matters to the parameter testing of overdamping wave detector in order to solve present tester, and a kind of acceleration geophone parameter proving installation and method of testing are provided.

The present invention provides a kind of parameter test device of wave detector, and it comprises control, arithmetic processing apparatus, is used for central authorities' control and computing data; A/D, D/A acquisition module are used for converting digital signal to simulating signal, and to be used for adopting analog signal conversion be digital signal; The filtering driver module is used to nurse one's health the simulating signal from said A/D, the output of D/A acquisition module, and is used to nurse one's health the simulating signal of being sent by wave detector to be measured; Tester is used for tie geophone and said filtering driver module, transmits said simulating signal; Isolation mounting is used to place wave detector, realizes the isolation of wave detector and extraneous vibration.Said filtering driver module and said A/D, D/A acquisition module are built in said control, the arithmetic processing apparatus, and said A/D, D/A acquisition module are through EBI and said control, arithmetic processing apparatus swap data.Said control, arithmetic processing apparatus comprise man-machine interface, are used for display demonstration, user's input operation, telemanagement etc., also comprise data storage, output, are used for statistics, storage, printing of data etc.

For this reason; Acceleration geophone parameter method of testing provided by the invention comprises: A, at first send simulating signal by control, arithmetic processing apparatus indication A/D, D/A acquisition module; This simulating signal is a step signal; This simulating signal is exported to wave detector to be measured to encourage its action through tester after nursing one's health through the filtering driver module.The DC voltage size of this step signal is for making 0.5 ~ 0.7 times of its maximum displacement of the outstanding body arrival of wave detector to locate; If this DC voltage is too high, the distance that the outstanding body of wave detector leaves the equilibrium position is excessive, might run into top cover up and down; Voltage is too low; The outstanding displacement body of wave detector is too small; Wave detector step response is output as a small-signal, and its signal to noise ratio (S/N ratio) is little, and test result is unreliable; So with reference to the step test code requirement of external underdamping acceleration geophone parameter tester SMT200, the size of this step signal voltage is to make 0.5 ~ 0.7 times of its maximum displacement of the outstanding body arrival of wave detector to locate.After B, wave detector receive the step signal activation; Meeting feedback response signal; This response signal is transferred to the filtering driver module through after nursing one's health through tester, is transferred to A/D, D/A acquisition module as phase step response signals, and A/D, D/A acquisition module collect the amplitude A0 and the moment t of maximum point from phase step response signals; Collect the amplitude A1 of flex point again from phase step response signals, this flex point moment corresponding is the 2t moment just; C, according to the step response voltage equation of wave detector:

$A\left(t\right)=\mathrm{BL}\stackrel{\&CenterDot;}{X}\left(t\right)=\frac{{\mathrm{BL\&omega;}}_0{\mathrm{<figure-callout\; id="0"\; label="X"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">X</figure-callout>}}_0}{2\sqrt{{\mathrm{\&zeta;}}^2-1}}{e}^{-\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}({-e}^{{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t}+e^{-{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t})---\left(1\right)$

Wherein, in the above-mentioned formula, the product electromagnetic induction constant of BL, ω ₀Be wave detector natural angular frequency, X ₀Before the step generation, outstanding body produces stable displacement, and ζ is the relative damping factor of wave detector, calculates ratio of damping by control, arithmetic processing apparatus.

Said (1) is found the solution, calculate ratio of damping.If ζ＞1, the expression formula of relative damping factor is:

$\frac{A0}{A1}=\frac{{(\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})}^{\frac{\mathrm{\&zeta;}}{\sqrt{{\mathrm{\&zeta;}}^2-1}}}}{2\mathrm{\&zeta;}}$

Adopt the Newton iteration method of interpolation to find the solution in the present invention.One of them initial value is:

$\mathrm{\&zeta;}=\frac{e}{2\frac{A0}{A1}}$

Optimized technical scheme of the present invention also comprises step D: ask second derivative to find the solution to said (1) formula, the second order differentiate equals 0 and draws following formula

${\mathrm{<figure-callout\; id="0"\; label="f"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">f</figure-callout>}}_0=\frac{\ln (\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})}{2\mathrm{\&pi;t}\sqrt{{\mathrm{\&zeta;}}^2-1}}$

, calculate free-running frequency by control, arithmetic processing apparatus.

The parameter devices of overdamping wave detector of the present invention and method of testing can realize the measurement of overdamping acceleration geophone parameter, and the measuring accuracy high duplication is good, reliable and stable advantage with compact conformation.Device has advantages such as volume is little, in light weight, easy to carry, low price; With the convenient and fast connection of microcomputer, DOS or WINDOWS operation interface, man-machine interface is intuitively friendly; Data storage, statistical study, printing can be carried out, telemanagement can also be carried out in addition.This testing algorithm is simple, is easy to realize, precision is high, and test speed is fast, thereby theoretical foundation, implementation algorithm and proving installation thereof is provided for the test of overdamping wave detector.

Further aspect of the present invention and aspect will be able to clearly put down in writing in the description below with reference to the embodiment of accompanying drawing.

Description of drawings

Fig. 1 is the synoptic diagram of overdamping acceleration geophone parameter proving installation of the present invention.

Fig. 2 is the step response curve figure of overdamping wave detector.

Fig. 3 is a parameter test method process flow diagram of the present invention.

The step response curve figure that Fig. 4 obtains for overdamping acceleration geophone parameter method of testing of the present invention.

Embodiment

Following with reference to accompanying drawing, with specific embodiment the present invention is done further explain.

With reference to Fig. 1, what the A/D in this device, D/A acquisition module adopted is the data acquisition module of 16 isa bus interface, the simulating signal of output when the 1V amplitude degree of distortion less than 0.01%.In reality test, also can select 24 or high-precision data acquisition module more for use according to the different cultivars of wave detector and testing requirement.What the control in this device, arithmetic processing apparatus were adopted is the integrated industrial computer of the built-in isa bus interface of customization, and EBI that also can the binding data acquisition module in the practical application is selected suitable host computer.EBI also can be selected as required in addition, and EBIs such as USB, PCI, PXI all can adopt.Also can connect output and memory storage 8 etc. on the control arithmetic processing apparatus 1 of this device.

In the present embodiment, the sample of selecting for use is the PSA-13A wave detector, and this detector via China Testing Technology Institute identifies that the evaluation value is as shown in table 1.Its parameter index is free-running frequency 13 ± 5%Hz, coil resistance 830 ± 5% Ω, velocity sensitivity (80Hz) 56 ± 5%v/m/s, damping 1.78 ± 10%, harmonic distortion≤0.1%.China Testing Technology Institute identifies that the proving installation volume of use is big, and test speed is slow, is not suitable for batch testing and uses, and is applied to lab investigation.

With reference to Fig. 3, concrete testing procedure is following:

The first step is fixed on wave detector 7 on the isolation mounting 5, and the positive and negative terminal of wave detector 7 is connected on the tester 4.

Second step, open control, arithmetic processing apparatus 1, the wave detector movement index in man-machine interface 6 test setting menus is provided with the parameter that the inside is provided with the PSA-13A wave detector.The free-running frequency f of PSA-13A wave detector ₀For 13Hz, the outstanding physique amount M of wave detector are the maximum displacement X of 11.5g, the outstanding body of wave detector _MCoil internal resistance r for 2mm, wave detector _cBe the velocity sensitivity S of 830 Ω, wave detector _aExcitation frequency f for 56v/m/s, demarcation geophone sensitivity ₀For 80Hz, known divider resistance R are 500 Ω.

In the string index movement whether parallel resistance, parallel resistance value, serial number, parallelly connected number, cable resistance rate, spacing cable length, outgoing cable length are set.If in database, only need open test setting menu selection wave detector movement specification during test is PSA-13A for wave detector movement index and string index, the string specification is that PSA-13A-1*1 gets final product.After setting finished, the beginning option test option in the hit testing menu got into test interface.

The 3rd step, at first send simulating signal during test by control, arithmetic processing apparatus 1 indication A/D, D/A acquisition module 2, this simulating signal is a step signal, after 3 conditionings of filtering driver module, exports to wave detector 7 to be measured to encourage its action through tester 4.The size of step signal is to make 0.7 times of its maximum displacement of the outstanding body arrival of wave detector to locate.The expression formula of step voltage is:

$V=\frac{1.4\mathrm{\&pi;}{f}_0{X}_{m}M(r_c+R)}{S_a\sqrt{{\left(\frac{{\mathrm{<figure-callout\; id="0"\; label="f"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">f</figure-callout>}}_0^2-f_S^2}{f_S{f}_0}\right)}^2+4{\mathrm{\&zeta;}}^2}}$

The above index of correlation of PSA-13A wave detector is all preserved in the test setting database, is 1.126V according to following formula by the step test voltage that test interface can calculate the PSA-13A wave detector according to the index of preserving in the database.

After wave detector received the step signal activation, meeting feedback response signal was with reference to the step response curve figure of Fig. 2 overdamping wave detector.This response signal is transferred to filtering driver module 3 through after nursing one's health through tester 4; Be transferred to A/D, D/A acquisition module 2 as phase step response signals; A/D, D/A acquisition module 2 collect the amplitude A0 and the moment t of maximum point from phase step response signals; Collect the amplitude A1 of flex point again from phase step response signals, this flex point moment corresponding is the 2t moment just, and the signal that A/D, D/A acquisition module 2 collect sends to control, arithmetic processing apparatus 1; Calculate geophone damping coefficient and free-running frequency by control, arithmetic processing apparatus 1 again, concrete computational algorithm step is following:

Step response voltage equation by wave detector:

$A\left(t\right)=\mathrm{BL}\stackrel{\&CenterDot;}{X}\left(t\right)=\frac{{\mathrm{BL\&omega;}}_0{\mathrm{<figure-callout\; id="0"\; label="X"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">X</figure-callout>}}_0}{2\sqrt{{\mathrm{\&zeta;}}^2-1}}{e}^{-\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}({-e}^{{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t}+e^{-{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t})---\left(1\right)$

To (1) formula differentiate, obtain:

$\stackrel{\&CenterDot;}{A}\left(t\right)=\frac{{\mathrm{BL\&omega;}}_0^2{\mathrm{<figure-callout\; id="0"\; label="X"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">X</figure-callout>}}_0}{2\sqrt{{\mathrm{\&zeta;}}^2-1}}{e}^{-\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}[(\mathrm{\&zeta;}-\sqrt{{\mathrm{\&zeta;}}^2-1})e^{\sqrt{{\mathrm{\&zeta;}}^2-1}{\mathrm{\&omega;}}_{0}t}-(\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})e^{-\sqrt{{\mathrm{\&zeta;}}^2-1}{\mathrm{\&omega;}}_{0}t}]---\left(2\right)$

During as

; Get amplitude extremum A0, t satisfies condition constantly:

$e^{{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t}=\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1}---\left(3\right)$

Get by (3) formula:

$e^{-{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t}=\mathrm{\&zeta;}-\sqrt{{\mathrm{\&zeta;}}^2-1}---\left(4\right)$

Amplitude A0 is:

$A0=-\mathrm{BL}{\mathrm{\&omega;}}_0{X}_0{e}^{-\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}---\left(5\right)$

Same computing method can get amplitude A1:

$A1=-2\mathrm{BL}{\mathrm{\&omega;}}_0{\mathrm{<figure-callout\; id="0"\; label="X"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">X</figure-callout>}}_0{\mathrm{\&zeta;e}}^{-2\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}---\left(6\right)$

(5) be divided by with (6) two formulas:

$\frac{A0}{A1}=\frac{e^{\mathrm{\&zeta;}{\mathrm{\&omega;}}_0\mathrm{<figure-callout\; id="2"\; label="t"\; filenames="HDA00001630207200011.png"\; state="\{\{state\}\}">t</figure-callout>}}}{2\mathrm{\&zeta;}}---\left(7\right)$

If ζ＞1 is got by (3) formula:

$e^{{\mathrm{\&zeta;\&omega;}}_{0}t}={(\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})}^{\frac{\mathrm{\&zeta;}}{\sqrt{{\mathrm{\&zeta;}}^2-1}}}---\left(8\right)$

In substitution (7) formula, can get

$\frac{A0}{A1}=\frac{{(\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})}^{\frac{\mathrm{\&zeta;}}{\sqrt{{\mathrm{\&zeta;}}^2-1}}}}{2\mathrm{\&zeta;}}---\left(9\right)$

Can find out that through above derivation ratio of damping is just only relevant with A1 with two amplitude A0 of step response curve, just can calculate ratio of damping through the amplitude that calculates these two points.Adopt the Newton iteration method of interpolation to find the solution in the present invention.Further research draws to (9) formula:

$\underset{\mathrm{\&zeta;}\&RightArrow;1}{\lim }\frac{{(\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})}^{\frac{\mathrm{\&zeta;}}{\sqrt{{\mathrm{\&zeta;}}^2-1}}}}{2\mathrm{\&zeta;}}=e---\left(10\right)$

One of them initial value is:

$\mathrm{\&zeta;}=\frac{e}{2\frac{A0}{A1}}---\left(11\right)$

For the 2t moment point is flex point, does further explanation, and A (t) is asked second derivative, can get:

$\stackrel{\&CenterDot;\&CenterDot;}{A}\left(t\right)=\frac{{\mathrm{BL\&omega;}}_0^3{\mathrm{<figure-callout\; id="0"\; label="X"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">X</figure-callout>}}_0}{2\sqrt{{\mathrm{\&zeta;}}^2-1}}{e}^{-\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}[-{(\mathrm{\&zeta;}-\sqrt{{\mathrm{\&zeta;}}^2-1})}^2{e}^{{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t}-{(\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})}^2{e}^{-{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t}]---\left(12\right)$

(3) formula and (4) formula substitution (12) formula can be got 2t value constantly:

$\stackrel{\&CenterDot;\&CenterDot;}{A}\left(2t\right)=0---\left(13\right)$

To (13) formula differentiate,

$\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{A}\left(t\right)=\frac{{\mathrm{BL\&omega;}}_0^4{\mathrm{<figure-callout\; id="0"\; label="X"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">X</figure-callout>}}_0}{2\sqrt{{\mathrm{\&zeta;}}^2-1}}{e}^{-\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}[{(\mathrm{\&zeta;}-\sqrt{{\mathrm{\&zeta;}}^2-1})}^3{e}^{{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t}-{(\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})}^3{e}^{-{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t}]---\left(14\right)$

(3) formula and (4) formula substitution (14) formula can be got 2t value constantly:

$\stackrel{\&CenterDot;\&CenterDot;\&CenterDot;}{A}\left(t\right)=-2\mathrm{BL}{\mathrm{\&omega;}}_0^4{\mathrm{<figure-callout\; id="0"\; label="X"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">X</figure-callout>}}_0{\mathrm{\&zeta;e}}^{-2\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}\&NotEqual;0---\left(15\right)$

Therefore 2t is the flex point on the step response curve constantly.

Because of ζ＞1, by (12) Shi Kede:

${\mathrm{<figure-callout\; id="0"\; label="f"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">f</figure-callout>}}_0=\frac{\ln (\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})}{2\mathrm{\&pi;t}\sqrt{{\mathrm{\&zeta;}}^2-1}}---\left(16\right)$

After obtaining ratio of damping, obtain the wave detector free-running frequency according to (16) formula.

The 4th step calculated direct current resistance and sensitivity by control, arithmetic processing apparatus 1, and concrete computational algorithm step is following:

Direct current resistance and Sensitivity calculation formula are:

$r_c=\frac{V_0}{V-V_0}R$

$S=\sqrt{\frac{2\mathrm{\&pi;}{\mathrm{<figure-callout\; id="0"\; label="f"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">f</figure-callout>}}_0{\mathrm{MA}}_0{r}_c}{V_0}{e}^{\frac{{\mathrm{tg}}^{-1}\frac{\sqrt{1-{\mathrm{\&zeta;}}^2}}{\mathrm{\&zeta;}}}{\frac{\sqrt{1-{\mathrm{\&zeta;}}^2}}{\mathrm{\&zeta;}}}}}$

In these two formula, f in the formula ₀Free-running frequency for wave detector; M is the outstanding physique amount of wave detector; ζ is a ratio of damping; A ₀First PV for the output of wave detector step response; r _cResistance for wave detector; V ₀For being added in the stable DC voltage of wave detector output terminal; V is the total voltage that is added on divider resistance and the wave detector; R is a divider resistance.

In the 5th step, in like manner the method according to the 3rd step adds sinusoidal signal excitation to wave detector, gathers the sinusoidal response signal of wave detector, tests out degree of distortion.Degree of distortion when test be equally with reference to the test specification of SMT200, test distortion degree when the outstanding body vibration velocity peak-to-peak value of wave detector is 0.7 inch per second.The degree of distortion test voltage that can calculate the PSA-13A wave detector according to the index of preserving in the database is 1.188V.Add sinusoidal signal excitation computing formula be:

$V=\frac{0.00889}{W}\sqrt{{\left[M(r_c+R)\left(\frac{{\mathrm{<figure-callout\; id="0"\; label="f"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">f</figure-callout>}}_0^2-f^2}{f}\right)\right]}^2+4{[M(r_c+R)\mathrm{\&zeta;}{\mathrm{<figure-callout\; id="0"\; label="f"\; filenames="HDA00001630207200012.png"\; state="\{\{state\}\}">f</figure-callout>}}_0+\mathrm{\&pi;}{W}^2]}^2}$

Wherein, f _sExcitation frequency when demarcating acceleration sensitivity for producer; S _aBe velocity sensitivity; f ₀Free-running frequency for wave detector; M is the outstanding physique amount of wave detector; ζ is final damping ratio; r _cInternal resistance for wave detector; R is a divider resistance; F is the sinusoidal excitation frequency, by test specification requirement value: work as f ₀During＜12Hz, get f=12Hz, work as f ₀During＞12Hz, get f=f ₀

The computing formula of degree of distortion is:

$d=\frac{\sqrt{A_2^2+A_3^2}}{A_1}$

In the formula, A ₁Be fundametal compoment, A ₂Be second harmonic component, A ₃Be third-harmonic component.

The 6th step, the test value of control, arithmetic processing apparatus 1 storage ratio of damping, free-running frequency, direct current resistance, sensitivity, degree of distortion.Can check test result from test interface, also can check step response curve, amplitude-frequency, the phase frequency curve of wave detector, can also analyze through the printer prints data.With reference to the step response curve figure of Fig. 4 for obtaining for overdamping acceleration geophone parameter method of testing of the present invention.

The final test value of this exemplar is as shown in table 1.

Table 1

Test event	Index	The evaluation value	The instrument test value
				Free-running frequency (Hz)	13±5%	13.02	13.07
Coil resistance (Ω)	830±5%	836	835
				Velocity sensitivity (80Hz) (v/m/s)	56±5%	55.26	54.38
Damping	1.78±10%	1.794	1.861
				Harmonic distortion (%)	≤0.1	0.03	0.04

The test value of this exemplar all in indication range, is certified products.

The technical indicator that overdamping acceleration geophone parameter proving installation of the present invention reaches is as shown in table 2:

Table 2

Technical indicator	Test specification	Measuring accuracy	Resolution
				Free-running frequency	1～100Hz	±1％	0.01Hz
Direct current resistance	20～9999Ω	±1％	1Ω(0.1Ω,<100Ω)
				Ratio of damping	0.05～0.85	±0.01	0.001
Sensitivity	0～1000V/m/s	±2％	0.1V/m/s
				Degree of distortion	0.02％～10％	±0.05％	0.01％

This device not only can carry out the test of overdamping acceleration geophone parameter, can also carry out parameter testing to common little damping wave detector; Not only can carry out the test of single wave detector movement, can also test the receiver pattern string.This device can both be tested the index that acceleration geophone parameter relates to, and comprises ratio of damping, free-running frequency, direct current resistance, sensitivity, degree of distortion.The industrial computer human-computer interaction function is very strong, for the exploitation the new varieties wave detector, can through the user voluntarily input parameter add the test of carrying out the new varieties wave detector in the tester database to.For the combination string, different cables, different spacing, different extension lines can be changed setting inside option is set.After test finished, industrial computer was preserved test result automatically.Can check test result from test interface, also can check step response curve, amplitude-frequency, the phase frequency curve of wave detector.Test data can statistical study, also can print, and is convenient to wave detector exploitation and user of service the performance of wave detector is analyzed.This device reaches and the external same precision of like product SMT200 common little damping acceleration geophone parameter test.

Claims (4)

1. acceleration geophone parameter proving installation is characterized in that comprising:

Control, arithmetic processing apparatus are used for central authorities' control and computing data;

A/D, D/A acquisition module are used for converting digital signal to simulating signal, and are used for simulating signal is become digital signal;

The filtering driver module is used to nurse one's health the simulating signal from said A/D, the output of D/A acquisition module, and is used to nurse one's health the simulating signal of being sent by wave detector;

Said filtering driver module and said A/D, D/A acquisition module are built in said control, the arithmetic processing apparatus;

Tester is used for tie geophone and said filtering driver module, transmits said simulating signal;

Isolation mounting is used to place wave detector, realizes the isolation of wave detector and extraneous vibration.

2. acceleration geophone parameter proving installation according to claim 1 is characterized in that:

Said control, the built-in isa bus interface of arithmetic processing apparatus, and be provided with man-machine interface;

Said A/D, D/A acquisition module are 16 isa bus interface data analog input cards;

Said A/D, D/A acquisition module are through said isa bus interface and said control, arithmetic processing apparatus swap data.

3. use the acceleration geophone parameter method of testing of acceleration geophone parameter proving installation as claimed in claim 1, it is characterized in that may further comprise the steps:

A: at first indicate said A/D, D/A acquisition module to send simulating signal by said control, arithmetic processing apparatus; This simulating signal is a step signal; After this simulating signal is nursed one's health through said filtering driver module; Export to wave detector to be measured to encourage its action through said tester, the size of this step signal is to make 0.5 ~ 0.7 times of its maximum displacement of the outstanding body arrival of wave detector to locate;

B: gather wave detector phase step response signals to be measured by said A/D, D/A acquisition module, collect the amplitude A of maximum point from wave detector phase step response signals to be measured ₀Reach t constantly, collect the amplitude A of flex point again from phase step response signals ₁, this flex point moment corresponding is the 2t moment just;

C: to the step response voltage equation of wave detector:

$A\left(t\right)=\mathrm{BL}\stackrel{\&CenterDot;}{X}\left(t\right)=\frac{{\mathrm{BL\&omega;}}_0{X}_0}{2\sqrt{{\mathrm{\&zeta;}}^2-1}}{e}^{-\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}({-e}^{{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t}+e^{-{\mathrm{\&omega;}}_0\sqrt{{\mathrm{\&zeta;}}^2-1}t})---\left(1\right)$

Wherein, in the above-mentioned formula, the product electromagnetic induction constant of BL, ω ₀Be wave detector natural angular frequency, X ₀Before the step generation, outstanding body produces stable displacement, and ζ is the relative damping factor of wave detector, finds the solution, if ζ＞1, the expression formula of relative damping factor is:

$\frac{A0}{A1}=\frac{{(\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})}^{\frac{\mathrm{\&zeta;}}{\sqrt{{\mathrm{\&zeta;}}^2-1}}}}{2\mathrm{\&zeta;}}$

, obtain the ratio of damping of wave detector by said control, arithmetic processing apparatus.

4. acceleration geophone parameter method of testing according to claim 3 is characterized in that also comprising step D: said (1) formula is asked second derivative, and the second order differentiate equals 0 and draws following formula:

$f_0=\frac{\ln (\mathrm{\&zeta;}+\sqrt{{\mathrm{\&zeta;}}^2-1})}{2\mathrm{\&pi;t}\sqrt{{\mathrm{\&zeta;}}^2-1}}$

, obtain the wave detector free-running frequency by said control, arithmetic processing apparatus.

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