CN109579973A - A kind of vibrating speed sensors sensitivity coefficient method of calibration - Google Patents
A kind of vibrating speed sensors sensitivity coefficient method of calibration Download PDFInfo
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- CN109579973A CN109579973A CN201811402431.5A CN201811402431A CN109579973A CN 109579973 A CN109579973 A CN 109579973A CN 201811402431 A CN201811402431 A CN 201811402431A CN 109579973 A CN109579973 A CN 109579973A
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- sensitivity coefficient
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
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- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present invention relates to a kind of vibrating speed sensors sensitivity coefficient methods of calibration, comprising the following steps: (1) determines verification range；(2) frequency and amplitude checkpoint are determined；(3) installation and checking sensor；(4) setting signal amplifier；(5) checkpoint detects；(6) the sensitivity coefficient for calculating every group of test result, averages；(7) the sensitivity coefficient under all frequencies is averaged, obtain ultimate sensitivity coefficient.In the present invention, using repeatedly verifying the sensitivity computing method being averaged under several values, multi-frequency, it may be implemented accurately to verify inertial speed sensor sensitivity coefficient, maximumlly eliminate issuable sensor measuring system error in measurement process, suitable for the vibration measurement with certain frequency bandwidth range, there is very strong practicability.
Description
Technical field
The invention belongs to sensitivity coefficient calibration technology fields, more particularly, to a kind of vibrating speed sensors sensitivity system
Number method of calibration.
Background technique
Inertial speed sensor is the sensor element for measuring vibrating object surface vibration velocity amplitude.Due to it
The advantages that high sensitivity, signal-to-noise ratio is strong, is not required to extraneous power supply is chiefly used in the vibration amplitude measurement of large rotating machinery bear box.
It uses coil cutting magnetic induction line to induce the principle of electromotive force generally to measure vibration.Velocity sensor shape is cylindrical body,
There is a cylinder strong magnet in inside in vertical position, and strong magnet upper and lower ends are fixed by spring, can limit it and be only capable of vertical
Position moves up and down.Around magnetic pole body on the inner wall of the housing on coil is installed, the inner wall when shell is vibrated with testee in this way
On coil can cut the magnetic induction line of strong magnet to induce electromotive force, realize the measurement to vibration velocity.Velocity sensor
Output signal be voltage, vibration velocity is bigger, and voltage is bigger, and it is smaller that vibration velocity gets over small voltage, and linear relationship is presented in the two,
Between ratio value be called the sensitivity coefficient of velocity sensor, unit is mV/ (mm/s), is indicated caused by unit speed value
Voltage.Due to be the other voltage of millivolt level therefore can be tested measuring appratus be directly employed without by signal amplify or turn
It changes.Each sensor has itself a sensitivity coefficient, since it is internal after sensor uses longer period of time
Minor change can occur for machine performance, and sensitivity coefficient will also change therewith, for the number of its measurement of the vibration of same degree
Value can shift.Therefore to guarantee the accurate with regard to needing periodically to verify sensor of measurement amplitude, it is current to find out it
Sensitivity coefficient.In addition to this for the vibration under different frequency, its sensitivity coefficient would also vary from velocity sensor,
When measurement accuracy requires very high, the verification for carrying out sensor at corresponding frequencies is also needed before measuring, is found out in phase
Answer the sensor sensitivity factor under frequency, this be before carrying out precise measurement very it is necessary to.The present invention designs one
Kind fast calibration method, can accurately obtain the sensitivity coefficient of velocity sensor, improve the accuracy of on-the-spot test.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide using repeatedly verification takes under several values, multi-frequency
The sensitivity computing method of average value, suitable for certain frequency bandwidth range vibration measurement, maximumlly eliminate survey
A kind of vibrating speed sensors sensitivity coefficient method of calibration of issuable sensor measuring system error during amount.
Specific technical solution of the present invention is as follows:
A kind of vibrating speed sensors sensitivity coefficient method of calibration, it is characterised in that: the following steps are included:
(1) verification range is determined: including verification frequency domain and amplitude range；
(2) frequency and amplitude checkpoint are determined；
(3) tested sensor and standard transducer are commonly mounted on shaking platform by installation and checking sensor；
(4) tested and standard transducer sensitivity is disposed as 1 by setting signal amplifier；
(5) checkpoint detects, and detects the sensitivity coefficient and record of different amplitudes under same frequency；
(6) the sensitivity coefficient for calculating every group of test result, averages；
(7) judge whether there is other and wait for measured frequency,
If so, then repeating step (5), (6), the sensitivity coefficient measurement of all frequencies is completed；
If nothing, into next step；
(8) the sensitivity coefficient under all frequencies is averaged, obtain ultimate sensitivity coefficient.
The advantages of the present invention are:
In the present invention, using the sensitivity computing method being averaged repeatedly is verified under several values, multi-frequency, it may be implemented
Inertial speed sensor sensitivity coefficient is accurately verified, is maximumlly eliminated issuable in measurement process
Sensor measuring system error has very strong practicability suitable for the vibration measurement with certain frequency bandwidth range.
Detailed description of the invention
Fig. 1 is equipment schematic diagram of the invention；
Fig. 2 is flow chart.
Specific embodiment
The present invention is described in further detail by following embodiment, but the technology contents that are described of the present embodiment be it is illustrative,
Without being restrictive, protection scope of the present invention should not be limited to according to this.
A kind of vibrating speed sensors sensitivity coefficient method of calibration, as shown in Figure 1, 2, innovation of the invention is: packet
Include following steps:
(1) verification range is determined: including verification frequency domain and amplitude range；
(2) frequency and amplitude checkpoint are determined；
(3) tested sensor and standard transducer are commonly mounted on shaking platform by installation and checking sensor；
(4) tested and standard transducer sensitivity is disposed as 1 by setting signal amplifier；
(5) checkpoint detects, and detects the sensitivity coefficient and record of different amplitudes under same frequency；
(6) the sensitivity coefficient for calculating every group of test result, averages；
(7) judge whether there is other and wait for measured frequency,
If so, then repeating step (5), (6), the sensitivity coefficient measurement of all frequencies is completed；
If nothing, into next step；
(8) the sensitivity coefficient under all frequencies is averaged, obtain ultimate sensitivity coefficient.
Embodiment
1, it determines verification range: the frequency range and amplitude range of verification is determined according to the test object of sensor, if most
Small measurement frequency is f1, and maximum measurement frequency is f.It is v1 that minimum vibration, which measures amplitude, and it is v that maximum vibration, which measures amplitude,.
2, it determines checkpoint: averagely taking 5 points in vibration measurement frequency range, obtain Frequency point f1, f2, f3, f4,
f5；5 points are averagely taken in vibration measurement amplitude range, obtain amplitude point v1, v2, v3, v4, v5.
3, installation and checking sensor: verified sensor and standard transducer are commonly mounted on standard vibration platform,
Output signal is connected to signal processor again to measure, test result is finally output to computer by signal processor.Signal
Figure is shown in Fig. 1.
4, measuring instrument is set: the sensitivity coefficient of tested sensor and standard transducer being all arranged in measuring instrument
For 1mV/ (mm/s).
5, checkpoint detects: operation standard shaking platform, according to checkpoint amplitude v1 predetermined in step 2,
V2 ... v5 distinguishes stimulating frequency and is the vibration of f1, and records the amplitude of verified sensor and standard transducer: k1, h1,
k2、h2……k5、h5。
6, meter sensitivity coefficient: setting the sensitivity coefficient of verified sensor as Q, the sensitivity coefficient of standard transducer
For P.So there are relationship Q/P=k/h, i.e. Q=kP/h between them.According to 5 groups of amplitude test results k1, h1 measured, k2,
H2 ... k5, h5 can calculate 5 sensitivity coefficient Q1, Q2 ... Q5.Then it is averaged to obtain Q '=(Q1+Q2
+Q3+Q4+Q5)/5。
7, multi-frequency verifies: returning to step 5 for vibrational excitation frequency and is reset to f2, f3 respectively ... and is calculated
Q ', Q " ..., then to Q ', Q " ... it is averaging, after the sensitivity coefficient under all frequencies is measured, carries out all spirits
Sensitivity coefficient is averaging, and the sensitivity coefficient Q0 in spectral range finally can be obtained.
In the present invention, using the sensitivity computing method being averaged repeatedly is verified under several values, multi-frequency, it may be implemented
Inertial speed sensor sensitivity coefficient is accurately verified, is maximumlly eliminated issuable in measurement process
Sensor measuring system error has very strong practicability suitable for the vibration measurement with certain frequency bandwidth range.
Claims (1)
1. a kind of vibrating speed sensors sensitivity coefficient method of calibration, it is characterised in that: the following steps are included:
(1) verification range is determined: including verification frequency domain and amplitude range；
(2) frequency and amplitude checkpoint are determined；
(3) tested sensor and standard transducer are commonly mounted on shaking platform by installation and checking sensor；(4) setting signal
Tested and standard transducer sensitivity is disposed as 1 by amplifier；
(5) checkpoint detects, and detects the sensitivity coefficient and record of different amplitudes under same frequency；
(6) the sensitivity coefficient for calculating every group of test result, averages；
(7) judge whether there is other and wait for measured frequency,
If so, then repeating step (5), (6), the sensitivity coefficient measurement of all frequencies is completed；
If nothing, into next step；
(8) the sensitivity coefficient under all frequencies is averaged, obtain ultimate sensitivity coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811402431.5A CN109579973A (en) | 2018-11-22 | 2018-11-22 | A kind of vibrating speed sensors sensitivity coefficient method of calibration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811402431.5A CN109579973A (en) | 2018-11-22 | 2018-11-22 | A kind of vibrating speed sensors sensitivity coefficient method of calibration |
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| CN109579973A true CN109579973A (en) | 2019-04-05 |
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| CN201811402431.5A Pending CN109579973A (en) | 2018-11-22 | 2018-11-22 | A kind of vibrating speed sensors sensitivity coefficient method of calibration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089987A (en) * | 2019-12-26 | 2020-05-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Portable field multi-frequency vibration acceleration correction system and method |
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| KR100994247B1 (en) * | 2008-08-20 | 2010-11-12 | 한국과학기술원 | Method and apparatus for determining phase sensitivity of an accelerometer based on an analysis of the harmonic components of the interference signal |
| CN104215925A (en) * | 2014-09-09 | 2014-12-17 | 广州供电局有限公司 | High-frequency sensor and sensitivity detecting device and method thereof |
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| CN207248916U (en) * | 2017-09-04 | 2018-04-17 | 广西电网有限责任公司电力科学研究院 | A kind of acceleration transducer calibrating installation |
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2018
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Patent Citations (6)
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| JP2000260105A (en) * | 1999-03-10 | 2000-09-22 | Fujitsu Ltd | Correcting method for acceleration sensor of storage disk device |
| KR100994247B1 (en) * | 2008-08-20 | 2010-11-12 | 한국과학기술원 | Method and apparatus for determining phase sensitivity of an accelerometer based on an analysis of the harmonic components of the interference signal |
| CN104215925A (en) * | 2014-09-09 | 2014-12-17 | 广州供电局有限公司 | High-frequency sensor and sensitivity detecting device and method thereof |
| CN105842483A (en) * | 2016-06-16 | 2016-08-10 | 重庆建设工业(集团)有限责任公司 | Triaxial accelerometer sensitivity measurement method |
| CN107063436A (en) * | 2017-03-23 | 2017-08-18 | 西安飞机工业（集团）有限责任公司 | A kind of method for eliminating aircraft engine vibrating sensor sensitivity difference |
| CN207248916U (en) * | 2017-09-04 | 2018-04-17 | 广西电网有限责任公司电力科学研究院 | A kind of acceleration transducer calibrating installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089987A (en) * | 2019-12-26 | 2020-05-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Portable field multi-frequency vibration acceleration correction system and method |
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Application publication date: 20190405 |