CN103913192A - Device and method for calibrating charge amplifying unit - Google Patents
Device and method for calibrating charge amplifying unit Download PDFInfo
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- CN103913192A CN103913192A CN201410124190.8A CN201410124190A CN103913192A CN 103913192 A CN103913192 A CN 103913192A CN 201410124190 A CN201410124190 A CN 201410124190A CN 103913192 A CN103913192 A CN 103913192A
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Abstract
The invention discloses a device for calibrating a charge amplifying unit. The output end of a charge generation device is connected with the input end of a change-over switch. The change-over switch controls charge supply to a standard charge amplifying unit or a tested charge amplifying unit. A data acquisition card acquires charge output data and transmits the charge output data to a computer. The computer controls the charge output amount and the change-over switch through a control card. The invention further discloses a calibrating method adopted by the device for calibrating the charge amplifying unit. The method comprises the following steps that parameters are input, and a tap position is set; equipment initialization is conducted; charges are output to the standard charge amplifying unit; whether standard charges meet preset conditions is judged, if yes, the charges are output to the tested charge amplifying unit, and a test report is generated after the tested charges are acquired, if not, the charge output amount of the charge generation device is adjusted. According to the device and method for calibrating the charge amplifying unit, a charge source, measurement of the standard charges and measurement of the tested charges are integrated, self-circulation type automatic control is achieved, and accurate calibration of the tested charge amplifying unit can be completed.
Description
Technical field
The present invention relates to a kind of electric charge amplifying unit calibrating installation and calibration steps, relate in particular to a kind of electric charge amplifying unit calibrating installation and calibration steps that Charge Source and measuring system are integrated.
Background technology
In at present domestic and international vibration measuring system, sensor used mostly is the sensor of quantity of electric charge formula, its sensitive element mostly is quartz wafer or piezoelectric ceramic piece, when vibration, sensor produces a certain amount of electric charge, the correlation parameter while vibration by the electric charge measurement producing is obtained.The measurement of the quantity of electric charge is generally used charge amplifier to complete, and the quantity of electric charge that charge amplifier produces sensor changes voltage into, can obtain the information of the corresponding quantity of electric charge by measuring voltage amount.Charge amplifier is electric charge amplifying unit, and its core is by charge signal conversion, zooms into tractable voltage signal or current signal.Therefore, the reliability of electric charge amplifying unit and precision will directly affect reliability and the degree of accuracy of vibration parameters test.In electric charge amplifying unit development process, mostly its debugging and performance test are sensor to be placed on shaking table stage body, shaking table stage body is applied to the vibration of certain value, produce the input of the corresponding quantity of electric charge as electric charge amplifying unit, then electric charge amplifying unit is debugged and performance test.Higher or the modes of impacting that adopt that vibration acceleration is larger realize more for frequency.When China is examined and determine electric charge amplifying unit, become electric charge as Charge Source voltage transitions by standard capacitance, Charge Source and measuring system are discrete.
In the correcting device of above-mentioned electric charge amplifying unit, utilize shaking table and standard transducer to realize the tune of electric charge amplifying unit of general frequency range and conventional Oscillation Amplitude more no problem, but the in the situation that of in lower frequency (lower than 10Hz) and higher frequency band (200kHz) or compared with amplitude, this calibration steps will be affected.The frequency of General Oscillation platform is 5Hz～10kHz, only has 5kHz than relatively large shaking table frequency sweep frequency.Oscillation Amplitude is subject to the impact of thrust and the load of stage body itself, is generally thrust when larger, and Oscillation Amplitude is larger, and vibration frequency is relatively little.Therefore vibration frequency is mainly the restriction of vibrated stage body, and vibration amplitude is also limited by the impact of the charge sensitivity of institute's accepted standard sensor except being subject to the restriction of stage body, and the quantity of electric charge of standard transducer output will reach maximum amount of charge 10
5pC, highest frequency 200khz, it is more difficult to implement.Utilize the mode of impacting to calibrate electric charge amplifying unit, but low frequency and the high frequency response performance that cannot realize electric charge amplifying unit are carried out in good time debug measurement, and the efficiency of test is lower.The Charge Source that existing market is produced is generally as static electric charge calibration use, and Charge Source and measuring system are discrete, and high and low frequency is measured and do not had clear and definite metering system.
Summary of the invention
Object of the present invention is just to provide in order to address the above problem a kind of electric charge amplifying unit calibrating installation and calibration steps that Charge Source and measuring system are integrated.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of electric charge amplifying unit calibrating installation, comprise the electric charge generating means for voltage signal being converted to charge signal, described electric charge generating means comprises the voltage signal source for generation of voltage signal, described calibrating installation also comprises switch, standard charge amplifying unit, data collecting card, control card and computing machine, the output terminal of described electric charge generating means is connected with the input end of described switch, the output terminal of described switch is connected with the input end of described standard charge amplifying unit or the input end of tested electric charge amplifying unit, the signal input part of described data collecting card is connected with the output terminal of described standard charge amplifying unit and the output terminal of described tested electric charge amplifying unit respectively, the output terminal of described data collecting card is connected with the signal input part of described computing machine, the control card control output end of described computing machine is connected with the control input end of described control card, the electric charge control output end of described control card is connected with the control input end of described electric charge generating means, the switch control output end of described control card is connected with the control input end of described switch, the Control of Voltage output terminal of described computing machine is connected with the control input end of described voltage signal source.
In said structure, the electric charge that electric charge generating means produces provides electric charge through switch for standard charge amplifying unit or tested electric charge amplifying unit, and switch is by control card control, control card is by computer control, so be finally that standard charge amplifying unit or tested electric charge amplifying unit obtain electric charge by computer control, accordingly, be in standard calibration process by computer control current operation or measure tested electric charge process; And computer-controlled reference factor comes from the standard charge data that data collecting card collects, in the situation that satisfying condition, it realizes the measurement of tested electric charge amplifying unit, so whole device forms the automation operating system of self-circulation type, finally guarantee the accuracy of measuring.
Particularly, described electric charge generating means also comprises gain control circuit, load driving circuits and Integral Transformation circuit, described gain control circuit is for realizing Voltage-output control by ride gain, described load driving circuits drives the ability of capacitive load for improving voltage signal source, described Integral Transformation circuit is for becoming voltage signal into charge signal by the mode of Integral Transformation; The output terminal of described voltage signal source is connected with described gain control circuit, described load driving circuits and described Integral Transformation circuit successively, and the output terminal of described Integral Transformation circuit is connected with the input end of described switch; The electric charge control output end of described control card is connected with the control input end of described gain control circuit.
In said structure, the gain control of gain control circuit is realized by control card, and control card is by computer control, the control reference factor of computing machine comes from the output data of data collecting card, so form the Optimizing Mode of determining the amount of gain of gain control circuit according to the actual output data of standard charge amplifying unit.Load driving circuits and Integral Transformation circuit are for exporting as required applicable electric charge.
The calibration steps that electric charge amplifying unit calibrating installation adopts, comprises the following steps:
(1) by computer input parameter: electric voltage frequency f, default charge value Q
if, signal input range U, the sensitivity of standard charge amplifying unit is set, switch gear is set;
(2) control card initialization, data acquisition card initialization;
(3) by control card control switch, to standard charge amplifying unit output charge, outputting standard charge value Q after the output data of data collecting card collection standard charge amplifying unit
mark;
Does (4) the following formula I of judgement set up? if set up, forward step (6) to, if be false, forward step (5) to:
(5) adjust the electric charge output quantity of electric charge generating means by control card, then return to step (4);
(6), by control card control switch, to tested electric charge amplifying unit output charge, data collecting card is exported tested charge value after gathering the output data of tested electric charge amplifying unit;
(7) computing machine carries out data processing to tested charge value, generates test report, finishes.
Beneficial effect of the present invention is:
Electric charge amplifying unit calibrating installation of the present invention is measured by Charge Source, standard charge and tested charge measurement is integrated in one, and has realized the automatic control of self-circulation type, can be convenient, the accurate calibration that completes rapidly tested electric charge amplifying unit; In completing the common test of electric charge amplifying unit, debugging, for low frequency, the high frequency performance of Measurement accuracy electric charge amplifying unit provide a kind of detection means, can cover low-frequency range is the interval that 0.1Hz～10Hz, high band are 10kHz～200kHz; And this calibrating installation also provides the electric charge input quantity of amplitude for the debugging of electric charge amplifying unit, maximum charge value can reach 10
5pC.This calibrating installation avoided prior device carry out electric charge amplifying unit tune compared with time, vibration stage body and the standard transducer problem to debugging restriction.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of electric charge amplifying unit calibrating installation of the present invention;
Fig. 2 is the process flow diagram of the calibration steps of electric charge amplifying unit calibrating installation employing of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, electric charge amplifying unit calibrating installation of the present invention comprises electric charge generating means, switch, standard charge amplifying unit, data collecting card, control card and computing machine, electric charge generating means comprises voltage signal source, gain control circuit, load driving circuits and Integral Transformation circuit, the output terminal of voltage signal source successively with gain control circuit, load driving circuits is connected with Integral Transformation circuit, the output terminal of Integral Transformation circuit is connected with the input end of switch, the output terminal of switch is connected with the input end of standard charge amplifying unit or the input end of tested electric charge amplifying unit, the signal input part of data collecting card is connected with the output terminal of standard charge amplifying unit and the output terminal of tested electric charge amplifying unit respectively, the output terminal of data collecting card is connected with the signal input part of computing machine, the control card control output end of computing machine is connected with the control input end of control card, the electric charge control output end of control card is connected with the control input end of gain control circuit, the switch control output end of control card is connected with the control input end of switch, the Control of Voltage output terminal of computing machine is connected with the control input end of voltage signal source.
In said structure, voltage signal source, gain control circuit, load driving circuits, Integral Transformation circuit, switch, standard charge amplifying unit, data collecting card, control card and computing machine are custom circuit or parts, do not need creative work to realize according to its functional requirement by those skilled in the art.Wherein, voltage signal source is for generation of voltage signal, and according to the frequency range difference using, voltage signal source adopts voltage signal generator or digital signal to block; Gain control circuit, for realizing Voltage-output control by ride gain, can adopt the voltage controlled gain circuit of multistage amplification, guarantees that Voltage-output amplitude meets the demands, and makes its peak-to-peak value reach 20V; Load driving circuits drives the ability of capacitive load for improving voltage signal source, make circuit maximum output voltage be not less than 20V(peak-to-peak value), dynamic range is not less than 200kHz; Integral Transformation circuit is for becoming voltage signal into charge signal by the mode of Integral Transformation; Switch provides the selection of electric charge for being embodied as standard charge amplifying unit or tested electric charge amplifying unit, have the function automatically switching according to control signal, and what its initial selected was connected is standard charge amplifying unit; Whether standard charge amplifying unit meets preset requirement for the electric charge of calibrating the output of Integral Transformation circuit, and output data is transferred to computing machine by data collecting card, the basis relatively judging as computing machine; Tested electric charge amplifying unit is object to be measured, and after by the calibration of standard charge amplifying unit, the electric charge providing for tested electric charge amplifying unit is the electric charge that meets preset standard; Data collecting card is for gathering the output data of standard charge amplifying unit or tested electric charge amplifying unit; The instruction of control card for sending according to computing machine, the control voltage of real-time adjustment output, thereby the real-time gain of ride gain control circuit, meanwhile, the connection status of switch is controlled in the instruction that control card also sends according to computing machine in real time; Computing machine has been used for the default of standard value, and the data that data collecting card is sent here contrast and send instruction to control card with preset data, automatically generate test report, and printing test is reported as required simultaneously.Switch wherein and standard charge amplifying unit form standard calibration device.
As shown in Figure 2, the calibration steps that electric charge amplifying unit calibrating installation of the present invention adopts, comprises the following steps:
(1) by computer input parameter: electric voltage frequency f, default charge value Q
if, signal input range U, the sensitivity of standard charge amplifying unit is set, switch gear is set;
(2) control card initialization, data acquisition card initialization;
(3) by control card control switch, to standard charge amplifying unit output charge, outputting standard charge value Q after the output data of data collecting card collection standard charge amplifying unit
mark;
Does (4) the following formula I of judgement set up? if set up, forward step (6) to, if be false, forward step (5) to:
In above formula, at Q
ifequal Q
marktime, be the state that the output charge of Integral Transformation circuit meets preset value most, but be just difficult to standard so, so error of being provided with, in the time that its error is not more than 2%, the real-time output charge that is judged as Integral Transformation circuit meets preset value, does not meet otherwise be judged as;
(5) adjust the electric charge output quantity of electric charge generating means by control card, then return to step (4); In this example, realize Voltage-output control by the gain of control card ride gain control circuit, thereby change the input voltage of load driving circuits and Integral Transformation circuit, the final electric charge output quantity of adjusting Integral Transformation circuit that realizes;
(6), by control card control switch, to tested electric charge amplifying unit output charge, data collecting card is exported tested charge value after gathering the output data of tested electric charge amplifying unit;
(7) computing machine carries out data processing to tested charge value, generates test report, finishes; In this step, the data handling procedure that computing machine carries out is conventional data-signal processing, and object is the data of the forms such as the data transformation that data collecting card is sent here is form, so that operating personnel intuitively understand its information; The test report generating can be printed as required.
Above-described embodiment is preferred embodiment of the present invention; it is not the restriction to technical solution of the present invention; as long as the technical scheme that can realize on the basis of above-described embodiment without creative work, all should be considered as falling within the scope of the rights protection of patent of the present invention.
Claims (3)
1. an electric charge amplifying unit calibrating installation, comprise the electric charge generating means for voltage signal being converted to charge signal, described electric charge generating means comprises the voltage signal source for generation of voltage signal, it is characterized in that: described calibrating installation also comprises switch, standard charge amplifying unit, data collecting card, control card and computing machine, the output terminal of described electric charge generating means is connected with the input end of described switch, the output terminal of described switch is connected with the input end of described standard charge amplifying unit or the input end of tested electric charge amplifying unit, the signal input part of described data collecting card is connected with the output terminal of described standard charge amplifying unit and the output terminal of described tested electric charge amplifying unit respectively, the output terminal of described data collecting card is connected with the signal input part of described computing machine, the control card control output end of described computing machine is connected with the control input end of described control card, the electric charge control output end of described control card is connected with the control input end of described electric charge generating means, the switch control output end of described control card is connected with the control input end of described switch, the Control of Voltage output terminal of described computing machine is connected with the control input end of described voltage signal source.
2. electric charge amplifying unit calibrating installation according to claim 1, it is characterized in that: described electric charge generating means also comprises gain control circuit, load driving circuits and Integral Transformation circuit, described gain control circuit is for realizing Voltage-output control by ride gain, described load driving circuits drives the ability of capacitive load for improving voltage signal source, described Integral Transformation circuit is for becoming voltage signal into charge signal by the mode of Integral Transformation; The output terminal of described voltage signal source is connected with described gain control circuit, described load driving circuits and described Integral Transformation circuit successively, and the output terminal of described Integral Transformation circuit is connected with the input end of described switch; The electric charge control output end of described control card is connected with the control input end of described gain control circuit.
3. the calibration steps that electric charge amplifying unit calibrating installation as claimed in claim 1 or 2 adopts, is characterized in that: comprise the following steps:
(1) by computer input parameter: electric voltage frequency f, default charge value Q
if, signal input range U, the sensitivity of standard charge amplifying unit is set, switch gear is set;
(2) control card initialization, data acquisition card initialization;
(3) by control card control switch, to standard charge amplifying unit output charge, outputting standard charge value Q after the output data of data collecting card collection standard charge amplifying unit
mark;
Does (4) the following formula I of judgement set up? if set up, forward step (6) to, if be false, forward step (5) to:
(5) adjust the electric charge output quantity of electric charge generating means by control card, then return to step (4);
(6), by control card control switch, to tested electric charge amplifying unit output charge, data collecting card is exported tested charge value after gathering the output data of tested electric charge amplifying unit;
(7) computing machine carries out data processing to tested charge value, generates test report, finishes.
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| CN201410124190.8A CN103913192B (en) | 2014-03-31 | 2014-03-31 | A kind of electric charges amplify sing1e unit calibration device and calibration steps |
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| CN201410124190.8A CN103913192B (en) | 2014-03-31 | 2014-03-31 | A kind of electric charges amplify sing1e unit calibration device and calibration steps |
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| CN103913192B CN103913192B (en) | 2016-02-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106445262A (en) * | 2015-06-04 | 2017-02-22 | 辛纳普蒂克斯公司 | Calibrating charge mismatch in a baseline correction circuit |
| CN109617534A (en) * | 2018-11-28 | 2019-04-12 | 北京航星机器制造有限公司 | A kind of charge amplifier |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1224757A1 (en) * | 1984-08-20 | 1986-04-15 | Предприятие П/Я В-8685 | Charge calibrator |
| CN101581742A (en) * | 2008-05-15 | 2009-11-18 | 中茂电子(深圳)有限公司 | Detection machine station with contact impedance detection device |
| EP2428787A1 (en) * | 2010-09-08 | 2012-03-14 | Hottinger Baldwin Messtechnik GmbH | Method and device for calibrating a charge amplifier of a piezoelectric measurement chain |
-
2014
- 2014-03-31 CN CN201410124190.8A patent/CN103913192B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1224757A1 (en) * | 1984-08-20 | 1986-04-15 | Предприятие П/Я В-8685 | Charge calibrator |
| CN101581742A (en) * | 2008-05-15 | 2009-11-18 | 中茂电子(深圳)有限公司 | Detection machine station with contact impedance detection device |
| EP2428787A1 (en) * | 2010-09-08 | 2012-03-14 | Hottinger Baldwin Messtechnik GmbH | Method and device for calibrating a charge amplifier of a piezoelectric measurement chain |
Non-Patent Citations (4)
| Title |
|---|
| 国家技术监督局: "《中华人民共和国国家计量检定规程JJG338-1997 电荷放大器》", 1 September 1997 * |
| 张宁宁 等: "电荷放大器的校准及装置的不确定度评定", 《计测技术》 * |
| 张恒萍 等: "基于Visual Basic的电荷放大器自动校准系统研究", 《计测技术》 * |
| 机械电子工业部: "《中华人民共和国机械行业标准JB/T5458-91 电荷放大器 通用技术条件》", 10 July 1991 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106445262A (en) * | 2015-06-04 | 2017-02-22 | 辛纳普蒂克斯公司 | Calibrating charge mismatch in a baseline correction circuit |
| CN109617534A (en) * | 2018-11-28 | 2019-04-12 | 北京航星机器制造有限公司 | A kind of charge amplifier |
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| CN103913192B (en) | 2016-02-03 |
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