CN204188258U - A kind of high-temperature vibrating sensor width phase absolute calibration device - Google Patents
A kind of high-temperature vibrating sensor width phase absolute calibration device Download PDFInfo
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- CN204188258U CN204188258U CN201420673970.3U CN201420673970U CN204188258U CN 204188258 U CN204188258 U CN 204188258U CN 201420673970 U CN201420673970 U CN 201420673970U CN 204188258 U CN204188258 U CN 204188258U
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Abstract
The utility model provides the device of a kind of high-temperature vibrating sensor width phase absolute calibration.Above standard vibration machine, be fixed with columnar vibration extension rod, vibration extension rod top is placed by school sensor, vibrates extension rod top and is all placed in high-temperature test chamber by school sensor; Laser interferometer is placed on outside high-temperature test chamber; Be provided with thermoelectricity occasionally platinum resistance in high-temperature test chamber, high-temperature test chamber is heated by heating arrangement; Be connected with the modification amplifier outside high-temperature test chamber by high-temperature resistant signal line by school sensor, modification amplifier is connected with data collecting card; Laser interferometer is connected with photoelectric commutator, and photoelectric commutator is connected with data collecting card; Data collecting card connects computing machine.The utility model device adopts high-temperature test chamber to provide high temperature, adopts laser interferometer as vibration standard, realizes vibration transducer Sensitivity magnitude at high temperature and the calibration of phase place.
Description
Technical field
The utility model belongs to vibration measurement technical field, is applied to high-temperature vibrating sensor element, is specifically related to a kind of high-temperature vibrating sensor width phase absolute calibration device.
Background technology
Vibration transducer is widely used in links in the scientific research of defence and military, production and process of the test, is responsible for the function of monitoring and test under various environmental conditions.Find after deliberation, the sensitivity impact of temperature variation on vibration transducer is very large, this is because vibration transducer majority is made up of piezoelectric, according to the characteristic of piezoelectric, when it works beyond reference work temperature (room temperature), its output charge sensitivity will produce great changes.The test error introduced by temperature under high and low temperature environment be can not ignore, and must revise in use procedure to the sensitivity of vibration transducer.This calibrates the temperature response characteristics of vibration transducer with regard to requiring.
The calibration of current vibration transducer is all carry out at normal temperatures, and calibration steps comprises absolute method and relative method two kinds.Vibration absolute calibration is the method characteristic parameter of vibration level and vibration transducer being directly trace the fundamental physical quantity such as length, time, absolute calibration is the minimum method of current vibration calibration uncertainty, and the vibration standard that absolute method uses is laser vibration measurer.Vibration comparison method calibration is by being obtained by a kind of method of school transducer sensitivity by school sensor compared with the reference sensor by absolute calibration, uses the calibration uncertainty of the method large compared with absolute method.
Domestic and international vibration transducer manufacturer can produce the vibration transducer used under high temperature, the calibration of index of generally dispatching from the factory all adopts relative method to complete, and does not also carry out the calibrating installation of the sensor magnitudes sensitivity of absolute method high-temperature vibrating and phase alignment both at home and abroad.
Summary of the invention
The purpose of this utility model is the device providing the absolute calibration of a kind of high-temperature vibrating sensor width phase, adopts high-temperature test chamber to provide high temperature, adopts laser interferometer as vibration standard, realizes vibration transducer Sensitivity magnitude at high temperature and the calibration of phase place.
Realize the technical scheme of the utility model object: a kind of high-temperature vibrating sensor width phase absolute calibration device, it comprises standard vibration machine, columnar vibration extension rod is fixed with above standard vibration machine, vibration extension rod top is placed by school sensor, vibrates extension rod top and is all placed in high-temperature test chamber by school sensor; On high-temperature test chamber top cover, by position directly over the sensor of school, be provided with heat-protecting glass window, laser interferometer is placed on that high-temperature test chamber is outer, this heat-protecting glass window place; Be provided with thermoelectricity occasionally platinum resistance in high-temperature test chamber, high-temperature test chamber is heated by heating arrangement;
Be connected with the modification amplifier outside high-temperature test chamber by high-temperature resistant signal line by school sensor, modification amplifier is connected with data collecting card; Laser interferometer is connected with photoelectric commutator, and photoelectric commutator is connected with data collecting card; Data collecting card connects computing machine; Standard vibration machine is connected with power amplifier, and power amplifier is connected with signal source, and signal source connects computing machine.
A kind of high-temperature vibrating sensor width phase absolute calibration device as above, the vibration of the standard vibration machine described in it by vibration extension rod be delivered in high-temperature test chamber by school sensor.
A kind of high-temperature vibrating sensor width phase absolute calibration device as above, the temperature data that occasionally platinum resistance is measured in high-temperature test chamber of the thermoelectricity described in it passes to temperature controller.
Effect of the present utility model is: the device of high-temperature vibrating sensor width phase described in the utility model absolute calibration, high-temperature test chamber is adopted to provide high temperature, adopt laser interferometer as vibration standard, realize vibration transducer Sensitivity magnitude at high temperature and the calibration of phase place.The key technical indexes is:
Operating temperature range: 20 DEG C ~ 800 DEG C;
Operating frequency range: 10Hz ~ 2000Hz;
Amplitude calibration uncertainty: U=0.5% ~ 1.0% (k=2);
Phase alignment uncertainty: U=0.5 ° ~ 1 ° (k=2).
Accompanying drawing explanation
Fig. 1 is a kind of high-temperature vibrating sensor width phase absolute calibration apparatus structure schematic diagram described in the utility model.
In figure: 1. high-temperature test chamber; 2. by school sensor; 3. thermal resistance or platinum galvanic couple; 4. standard vibration machine; 5. vibrate extension rod; 6. laser interferometer; 7. power amplifier; 8. signal source; 9. temperature controller; 10. heating arrangement; 11. computing machines; 12. modification amplifiers; 13. data collecting cards; 14. photoelectric commutators.
Embodiment
Below in conjunction with the drawings and specific embodiments, high-temperature vibrating sensor width phase absolute calibration device described in the utility model is further described.
As shown in Figure 1, a kind of high-temperature vibrating sensor width phase absolute calibration device described in the utility model, described high temperature is 20 DEG C ~ 800 DEG C.It comprises standard vibration machine 4, is fixed with columnar vibration extension rod 5 above standard vibration machine 4, and vibration extension rod 5 top is placed by school sensor 2, vibrates extension rod 5 top and is all placed in high-temperature test chamber 1 by school sensor 2; On high-temperature test chamber 1 top cover, by position directly over school sensor 2, be provided with heat-protecting glass window, laser interferometer 6 is placed on that high-temperature test chamber 1 is outer, this heat-protecting glass window place;
Be provided with thermoelectricity occasionally platinum resistance 3 in high-temperature test chamber 1, high-temperature test chamber 1 is heated by heating arrangement 10.Thermoelectricity occasionally platinum resistance 3 temperature data measured in high-temperature test chamber 1 passes to temperature controller 9, controls heating arrangement 10 heat by temperature controller 9.
Be connected with the modification amplifier 12 outside high-temperature test chamber 1 by high-temperature resistant signal line by school sensor 2, modification amplifier 12 is connected with data collecting card 13; Laser interferometer 6 is connected with photoelectric commutator 14, and photoelectric commutator 14 is connected with data collecting card 13; Data collecting card 13 connects computing machine 11;
Standard vibration machine 4 is connected with power amplifier 7, and power amplifier 7 is connected with signal source 8, and signal source 8 connects computing machine 11.Computing machine 11 control signal source 8, controls power amplifier 7 by signal source 8 and then control criterion shaking table 4 produces vibration; The vibration of standard vibration machine 4 by vibration extension rod 5 be delivered in high-temperature test chamber 1 by school sensor 2.
Modification amplifier 12 inputs to data collecting card 13 being become voltage signal by the signal of school sensor 2, then inputs to computing machine 11 by data collecting card 13; Described laser interferometer 6 is measured by school sensor 2 surface vibration through heat-protecting glass, then vibration signal is inputed to data collecting card 13 by photoelectric commutator 14, then inputs to computing machine 13 by data collecting card 13; Computing machine 11, resolves by the Sensitivity magnitude of school sensor 2 and phase place for normative reference with the vibration value of laser interferometer 6.
The utility model applies sinusoidal vibration signal by standard vibration machine to by school high-temperature vibrating sensor; By vibration extension rod, the sinusoidal signal that standard vibration machine produces is delivered within high-temperature test chamber, provides high-temperature temperature environment by high-temperature test chamber; Normative reference using laser interferometer as vibration value, resolves by the Sensitivity magnitude of school high-temperature vibrating sensor and phase place.
The utility model carries out the absolute calibration of vibration transducer Sensitivity magnitude and phase place under high temperature, and concrete steps are as follows:
A vibration transducer is arranged on the top of vibration extension rod by (), and export sensor to modification amplifier with high-temperature resistant signal line;
B () closes high-temperature test chamber, open heating arrangement, set temperature value also starts to heat;
C () is heated to the temperature value of setting, after constant 30 minutes, open standard vibration machine to suitable vibration level;
D () measures the output signal of laser interferometer and vibration transducer simultaneously, calculate vibration transducer amplitude sensitivity at such a temperature and phase place.
E () repeats above step, obtain the vibration transducer Sensitivity magnitude under different temperatures and phase place, can draw the temperature characteristics of Sensitivity magnitude and phase place.
Claims (3)
1. a high-temperature vibrating sensor width phase absolute calibration device, it is characterized in that: this device comprises standard vibration machine (4), columnar vibration extension rod (5) is fixed with in standard vibration machine (4) top, vibration extension rod (5) top is placed by school sensor (2), vibrates extension rod (5) top and is all placed in high-temperature test chamber (1) by school sensor (2); On high-temperature test chamber (1) top cover, by position directly over school sensor (2), be provided with heat-protecting glass window, laser interferometer (6) be placed on high-temperature test chamber (1) outward, this heat-protecting glass window place;
Be provided with thermoelectricity occasionally platinum resistance (3) in high-temperature test chamber (1), high-temperature test chamber (1) is heated by heating arrangement (10);
Be connected with high-temperature test chamber (1) modification amplifier outward (12) by high-temperature resistant signal line by school sensor (2), modification amplifier (12) is connected with data collecting card (13); Laser interferometer (6) is connected with photoelectric commutator (14), and photoelectric commutator (14) is connected with data collecting card (13); Data collecting card (13) connects computing machine (11);
Standard vibration machine (4) is connected with power amplifier (7), and power amplifier (7) is connected with signal source (8), and signal source (8) connects computing machine (11).
2. a kind of high-temperature vibrating sensor width phase absolute calibration device according to claim 1, is characterized in that: the vibration of described standard vibration machine (4) by vibration extension rod (5) be delivered in high-temperature test chamber (1) by school sensor (2).
3. a kind of high-temperature vibrating sensor width phase absolute calibration device according to claim 1, is characterized in that: the described thermoelectricity temperature data that occasionally platinum resistance (3) is measured in high-temperature test chamber (1) passes to temperature controller (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420673970.3U CN204188258U (en) | 2014-11-05 | 2014-11-05 | A kind of high-temperature vibrating sensor width phase absolute calibration device |
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| CN201420673970.3U CN204188258U (en) | 2014-11-05 | 2014-11-05 | A kind of high-temperature vibrating sensor width phase absolute calibration device |
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| CN204188258U true CN204188258U (en) | 2015-03-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344885A (en) * | 2014-11-05 | 2015-02-11 | 北京航天计量测试技术研究所 | Magnitude-phase absolute calibration device of high-temperature vibration sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344885A (en) * | 2014-11-05 | 2015-02-11 | 北京航天计量测试技术研究所 | Magnitude-phase absolute calibration device of high-temperature vibration sensor |
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