CN103698000A - Vibration mode measuring method and device of vibration cylinder sensor - Google Patents
Vibration mode measuring method and device of vibration cylinder sensor Download PDFInfo
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- CN103698000A CN103698000A CN201310624245.7A CN201310624245A CN103698000A CN 103698000 A CN103698000 A CN 103698000A CN 201310624245 A CN201310624245 A CN 201310624245A CN 103698000 A CN103698000 A CN 103698000A
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Abstract
The invention belongs to the technical field of vibration cylinder sensor measurement, in particular relates to a vibration mode measuring method and a vibration mode measuring device of a vibration cylinder sensor, and aims to solve the problem that the vibration mode of the vibration cylinder sensor cannot be measured at present. The measuring method comprises the following steps that a to-be-measured vibration cylinder is vertically mounted on a rotating clamp disc, a laser vibration measuring instrument is mounted on a lifting working table, an optical column of the laser vibration measuring instrument is adjusted to be on an outer measured surface of the vibration cylinder and the optical column is perpendicular to the tested surface of the vibration cylinder, an external excitation source enables the vibration cylinder to be in the resonance state and the test is started. The measuring device comprises an anti-vibration working table and the external excitation source, wherein the lifting working table and the rotating clamp disc are arranged on the anti-vibration working table; the rotating clamp disc is used for mounting the vibration cylinder; the laser vibration testing instrument is arranged on the lifting working table; the laser vibration measuring instrument is connected with a computer. The measuring method is simple to operate, no complex environment such as a darkroom is needed, the testing can be performed in an ordinary room, the measurement is accurate and visible, and a complete vibration mode graph of multiple side surfaces and directions of the sensor can be obtained.
Description
Technical field
The invention belongs to the technical field of vibrating barrel sensor measurement, be specifically related to a kind of vibration shape measuring method and device of vibrating barrel sensor.
Background technology
The vibration shape of vibrating barrel sensor can only be at the method auxiliary photo-taking of use for laboratory laser holography with good conditionsi at present, holographic photography method equipment is complicated, and need in darkroom, carry out, the photo that photography obtains is the moire pattern of single direction plane, can only the assistant analysis vibration shape, can not reflect the actual vibration shape comprehensively.Vibration cylinder pressure transducer is resonant transducer, during the work of its pressure-sensing device in micro-amplitude vibration state, the vibration shape of this vibrating barrel has countless versions, by the rotational vibration along vibrating barrel circumferencial direction with along the radial vibration of vibrating barrel length direction, form, this vibration shape is one of design key of vibrating barrel sensor, this kind of vibration shape cannot be measured at present, can only lean on the auxiliary deduction of laser holography.
Summary of the invention
The present invention cannot measure at present in order to solve the vibration cylinder pressure transducer vibration shape, can only lean on the auxiliary deduction of laser holography, laser holography measuring equipment is complicated, and need in darkroom, carry out, the photo that photography obtains is simultaneously the moire pattern of single direction plane, can not reflect the problem of the actual vibration shape.
The present invention adopts following technical scheme to realize:
The vibration shape measuring method of vibrating barrel sensor, its step is as follows:
Tested vibrating barrel at right angle setting is on rotary chuck, laser vibration measurer is installed on self-powered platform, the light beam of laser vibration measurer is adjusted on the outer tested surface of vibrating barrel and light beam perpendicular to the measured surface of vibrating barrel, external driving source makes vibrating barrel in resonant condition, start to measure
1) rotating rotary chuck handle makes measured body evenly rotate a circle along vertical axis, just can obtain uniform a plurality of measurement points in the circumferential direction of the circle, gather the vibration signal of above-mentioned a plurality of measurement points, the vibration signal of the plurality of measurement point just can be in measuring system the circumferential vibration shape of resultant vibration cylinder;
2) rotate self-powered platform handle and change measuring height in vibrating barrel height or length range, rotating rotary chuck handle makes measured body evenly rotate a circle along vertical axis, just can obtain uniform a plurality of measurement points in the circumferential direction of the circle, gather the vibration signal of above-mentioned a plurality of measurement points, just can obtain the circumferential vibration shape of vibrating barrel differing heights or extension position;
3) rotary chuck angle is fixed, rotate self-powered platform handle and in vibrating barrel height or length range, continuously change uniformly measuring height, just can obtain vibrating barrel along a plurality of measurement points of vertical axis direction, gather the vibration signal of above-mentioned a plurality of measurement points, the vibration signal of the plurality of measurement point just can be in measuring system the axial vibration shape of resultant vibration cylinder.
Vibrating barrel sensor vibration shape measurement mechanism, comprises antivibration worktable, is provided with self-powered platform and rotary chuck on antivibration worktable, also comprise external driving source, rotary chuck is used for installing vibrating barrel, and laser vibration measurer is set on self-powered platform, and laser vibration measurer connects computer.
Preferably, laser vibration measurer arranges two.
The present invention compared with prior art has following beneficial effect: measuring method is simple to operate, do not need the complex environments such as darkroom, can carry out in general room, measure accurately, intuitively, can obtain the complete bending vibation mode picture in orientation, many sides of sensor, be the practical instrument that the sensor vibration shape is measured, analyzed, and with laser vibration measurer, realize the equipment that the vibrating barrel sensor vibration shape is measured for the first.The present invention also can be used for the vibration shape of other sensitive body such as resonance such as grade and measures.
Accompanying drawing explanation
Fig. 1 is vibrating barrel sensor vibration shape measurement mechanism structural representation,
Fig. 2 is examples measure result a,
Fig. 3 is examples measure result b,
Fig. 4 is examples measure result c,
Fig. 5 is examples measure result d,
Fig. 6 is examples measure result e,
In figure: 1-antivibration worktable, 2-self-powered platform, 3-rotary chuck, 4-vibrating barrel, 5-laser vibration measurer.
Embodiment
By reference to the accompanying drawings the specific embodiment of the present invention is described further.
Vibrating barrel sensor vibration shape measuring method, step is as follows:
Tested vibrating barrel at right angle setting is on rotary chuck, laser vibration measurer is installed on self-powered platform, the light beam of laser vibration measurer is adjusted on the outer tested surface of vibrating barrel and light beam perpendicular to the measured surface of vibrating barrel, external driving source makes vibrating barrel in resonant condition, start to measure
1) rotating rotary chuck handle makes measured body evenly rotate a circle along vertical axis, just can obtain uniform a plurality of measurement points in the circumferential direction of the circle, gather the vibration signal of above-mentioned a plurality of measurement points, the vibration signal of the plurality of measurement point just can be in measuring system the circumferential vibration shape of resultant vibration cylinder;
2) rotate self-powered platform handle and change measuring height in vibrating barrel height or length range, rotating rotary chuck handle makes measured body evenly rotate a circle along vertical axis, just can obtain uniform a plurality of measurement points in the circumferential direction of the circle, gather the vibration signal of above-mentioned a plurality of measurement points, just can obtain the circumferential vibration shape of vibrating barrel differing heights or extension position;
3) rotary chuck angle is fixed, rotate self-powered platform handle and in vibrating barrel height or length range, continuously change uniformly measuring height, just can obtain vibrating barrel along a plurality of measurement points of vertical axis direction, gather the vibration signal of above-mentioned a plurality of measurement points, the vibration signal of the plurality of measurement point just can be in measuring system the axial vibration shape of resultant vibration cylinder.
Vibrating barrel sensor vibration shape measurement mechanism, comprises antivibration worktable 1, is provided with self-powered platform 2 and rotary chuck 3 on antivibration worktable 1, also comprise external driving source, rotary chuck 3, for vibrating barrel 4 is installed, arranges laser vibration measurer 5 on self-powered platform 1, laser vibration measurer 5 connects computer.
The present invention adopts laser vibration measurer and is with the worktable of rotation, elevating function, realizing the vibration shape of the resonance sensitive body such as vibrating barrel measures, this measuring method is simple to operate, do not need the complex environments such as darkroom, can carry out in general room, measurement accurately, intuitively, can obtain the complete vibration shape in orientation, many sides of sensor, be the practical instrument that the sensor vibration shape is measured, analyzed, and with laser vibration measurer, realize the equipment that the vibrating barrel sensor vibration shape is measured for the first.
Embodiment:
1, test condition: laser instrument output frequency: 20KHz, enlargement factor: X 10.
2, method of testing:
1), with signal generator excited vibration cylinder, with the vibration of laser vibration measurer measuring vibrations cylinder.
2), vibrating barrel size: diameter phi 18mm, effective length: 55mm, radially selects 72 (every 5 degree) test points along vibrating barrel, axially selects 90 test points.
3, vibrating barrel vibration shape measurement result:
A, resonance frequency: 4. 255KHz, excitation amplitude: 6V, rotates rotary chuck handle and makes measured body evenly rotate a circle along vertical axis, and the vibration signal that gathers 72 measurement points obtains the circumferential bending vibation mode picture of vibrating barrel, as shown in Figure 2.From Fig. 2, seen 8 crests, the actual vibration shape is 4 crests, 4 troughs, and therefore, vibration when vibrating barrel resonance frequency is 4. 255KHz is 4 at the radially periodicity of circumferencial direction, and the vibration shape is 4.As select 2 laser vibration measurer synchro measures, can 4 crests of actual displayed, the circumferential bending vibation mode picture of 4 troughs.
B, resonance frequency: 7.271KHz, excitation amplitude: 6V, rotate self-powered platform handle and in vibrating barrel height (length) scope, change measuring height, rotating rotary chuck handle makes measured body evenly rotate a circle along vertical axis, the vibration signal that gathers 72 measurement points obtains the circumferential vibration shape of vibrating barrel differing heights position, as shown in Figure 3.From Fig. 3, seen 8 crests, the actual vibration shape is 4 crests, 4 troughs, and therefore, vibration when vibrating barrel resonance frequency is 7. 271KHz is 4 at the radially periodicity of circumferencial direction, and the vibration shape is 4.As select 2 laser vibration measurer synchro measures, can 4 crests of actual displayed, the circumferential bending vibation mode picture of 4 troughs.
C, resonance frequency: 4. 255KHz, excitation amplitude: 6V, rotary chuck angle is fixed, rotate self-powered platform handle and continuously change uniformly measuring height in vibrating barrel height (length) scope, just can obtain vibrating barrel along a plurality of measurement points of vertical axis direction, select 90 measurement points to gather vibration signal, the axial vibration shape of the plurality of measurement point resultant vibration cylinder in measuring system, as shown in Figure 4, there is 1 crest, vibrating shaft when this shows that vibrating barrel resonance frequency is 4. 255KHz is 1 to half wave number, and axially the vibration shape is 1.Vibration shape when therefore vibrating barrel resonance frequency is 4. 255KHz is (4,1) mould.
D, resonance frequency: 7.271KHz, excitation amplitude: 6V, rotary chuck angle is fixed, rotate self-powered platform handle and continuously change uniformly measuring height in vibrating barrel height (length) scope, just can obtain vibrating barrel along a plurality of measurement points of vertical axis direction, select 90 measurement points to gather vibration signal, the axial vibration shape of the plurality of measurement point resultant vibration cylinder in measuring system, as shown in Figure 5, there are 2 crests, vibrating shaft when this shows that vibrating simple harmonic quantity vibration frequency is 7.271KHz is 2 to half wave number, and axially the vibration shape is 2.Vibration shape when therefore vibrating barrel resonance frequency is 7.271KHz is (4,2) mould.Actual is 1 crest, and a trough, as select 2 laser vibration measurer synchro measures can 1 crest of actual displayed, the axial bending vibation mode picture of 1 trough.
E, resonance frequency: 11. 252KHz, excitation amplitude: 6V, rotary chuck angle is fixed, rotate self-powered platform handle and continuously change uniformly measuring height in vibrating barrel height (length) scope, just can obtain vibrating barrel along a plurality of measurement points of vertical axis direction, select 90 measurement points to gather vibration signal, the axial vibration shape of the plurality of measurement point resultant vibration cylinder in measuring system, as shown in Figure 6, there are 3 crests, vibrating shaft when this shows that vibrating simple harmonic quantity vibration frequency is 11.252KHz is 3 to half wave number, and axially the vibration shape is 3.Vibration shape when therefore vibrating barrel resonance frequency is 11.252KHz is (4,3) mould.Actual is 1 crest, and a trough, then 1 crest, as select 2 laser vibration measurer synchro measures can 1 crests of actual displayed, 1 trough, then 1 crest, axial bending vibation mode picture.
Claims (3)
1. a vibrating barrel sensor vibration shape measuring method, is characterized in that step is as follows:
Tested vibrating barrel at right angle setting is on rotary chuck, laser vibration measurer is installed on self-powered platform, the light beam of laser vibration measurer is adjusted on the outer tested surface of vibrating barrel and light beam perpendicular to the measured surface of vibrating barrel, external driving source makes vibrating barrel in resonant condition, start to measure
1) rotating rotary chuck handle makes measured body evenly rotate a circle along vertical axis, just can obtain uniform a plurality of measurement points in the circumferential direction of the circle, gather the vibration signal of above-mentioned a plurality of measurement points, the vibration signal of the plurality of measurement point just can be in measuring system the circumferential vibration shape of resultant vibration cylinder;
2) rotate self-powered platform handle and change measuring height in vibrating barrel height or length range, rotating rotary chuck handle makes measured body evenly rotate a circle along vertical axis, just can obtain uniform a plurality of measurement points in the circumferential direction of the circle, gather the vibration signal of above-mentioned a plurality of measurement points, just can obtain the circumferential vibration shape of vibrating barrel differing heights or extension position;
3) rotary chuck angle is fixed, rotate self-powered platform handle and in vibrating barrel height or length range, continuously change uniformly measuring height, just can obtain vibrating barrel along a plurality of measurement points of vertical axis direction, gather the vibration signal of above-mentioned a plurality of measurement points, the vibration signal of the plurality of measurement point just can be in measuring system the axial vibration shape of resultant vibration cylinder.
2. the device for vibrating barrel sensor vibration shape measuring method as claimed in claim 1, it is characterized in that comprising antivibration worktable (1), on antivibration worktable (1), be provided with self-powered platform (2) and rotary chuck (3), also comprise external driving source, rotary chuck (3) is for installing vibrating barrel (4), laser vibration measurer (5) is set on self-powered platform (2), and laser vibration measurer (5) connects computer.
3. vibrating barrel sensor vibration shape measurement mechanism according to claim 2, is characterized in that laser vibration measurer (5) arranges two.
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| CN201310624245.7A CN103698000A (en) | 2013-12-01 | 2013-12-01 | Vibration mode measuring method and device of vibration cylinder sensor |
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| CN201310624245.7A CN103698000A (en) | 2013-12-01 | 2013-12-01 | Vibration mode measuring method and device of vibration cylinder sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136276A (en) * | 2015-09-18 | 2015-12-09 | 沈阳化工大学 | Non-contact ball mill rotating cylinder vibration signal acquisition system |
| CN105397298A (en) * | 2015-11-30 | 2016-03-16 | 常德金德镭射科技股份有限公司 | Automatic laser carving machine convenient to adjust |
| CN111024271A (en) * | 2019-12-24 | 2020-04-17 | 太原航空仪表有限公司 | Surface mounting position selection method of piezoelectric excitation vibration cylinder sensor |
| CN116625492A (en) * | 2023-07-24 | 2023-08-22 | 浙江驰宇空天技术有限公司 | Quartz hemispherical harmonic oscillator detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08136338A (en) * | 1994-11-04 | 1996-05-31 | Mitsubishi Heavy Ind Ltd | Measuring device of vibration mode of rotating body |
| CN103175602A (en) * | 2013-02-01 | 2013-06-26 | 湖南科技大学 | Modal testing system and modal testing method on basis of single-point laser continuous plane-scanning vibration measurement |
| CN103364071A (en) * | 2013-07-31 | 2013-10-23 | 湖南科技大学 | Thin-wall cylinder modal test system and method for single-point laser continuous scanning vibration test |
-
2013
- 2013-12-01 CN CN201310624245.7A patent/CN103698000A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08136338A (en) * | 1994-11-04 | 1996-05-31 | Mitsubishi Heavy Ind Ltd | Measuring device of vibration mode of rotating body |
| CN103175602A (en) * | 2013-02-01 | 2013-06-26 | 湖南科技大学 | Modal testing system and modal testing method on basis of single-point laser continuous plane-scanning vibration measurement |
| CN103364071A (en) * | 2013-07-31 | 2013-10-23 | 湖南科技大学 | Thin-wall cylinder modal test system and method for single-point laser continuous scanning vibration test |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136276A (en) * | 2015-09-18 | 2015-12-09 | 沈阳化工大学 | Non-contact ball mill rotating cylinder vibration signal acquisition system |
| CN105136276B (en) * | 2015-09-18 | 2017-11-10 | 沈阳化工大学 | A kind of contactless ball mill rotary barrel vibration signal acquisition system |
| CN105397298A (en) * | 2015-11-30 | 2016-03-16 | 常德金德镭射科技股份有限公司 | Automatic laser carving machine convenient to adjust |
| CN111024271A (en) * | 2019-12-24 | 2020-04-17 | 太原航空仪表有限公司 | Surface mounting position selection method of piezoelectric excitation vibration cylinder sensor |
| CN116625492A (en) * | 2023-07-24 | 2023-08-22 | 浙江驰宇空天技术有限公司 | Quartz hemispherical harmonic oscillator detection device |
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