CN110068437B - Method for checking vibration magnitude of electronic product - Google Patents
Method for checking vibration magnitude of electronic product Download PDFInfo
- Publication number
- CN110068437B CN110068437B CN201910395132.1A CN201910395132A CN110068437B CN 110068437 B CN110068437 B CN 110068437B CN 201910395132 A CN201910395132 A CN 201910395132A CN 110068437 B CN110068437 B CN 110068437B
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- vibration
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- tested electronic
- product test
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 97
- 230000005284 excitation Effects 0.000 claims abstract description 8
- 238000012795 verification Methods 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a verification method of vibration magnitude of an electronic product, and aims to provide a verification method capable of improving measurement and control accuracy of a vibration test of the electronic product. The invention is realized by the following technical scheme: fixing a tested electronic product test piece between positioning strips on the wide sides of a rectangular rigid platform of a vibration clamp, manufacturing rectangular grooves which are tightly attached to four opposite angles of the tested electronic product test piece on each positioning strip, fixing L-shaped corner plates which are tightly attached to corners of the tested electronic product test piece in each rectangular groove, and respectively mounting vibration sensors on each L-shaped corner plate to form four corner check points; and taking the vibration average value measured by the vibration sensors arranged on the four check points as an excitation input value of a test, checking the vibration magnitude of the tested electronic product test piece through the vibration table control equipment, transmitting stress generated by vibration of the tested electronic product test piece to the vibration sensor, and transmitting the vibration test control magnitude to the vibration table control equipment by the vibration sensor to display the check value.
Description
Technical Field
The invention relates to a verification method for vibration magnitude of an electronic product.
Background
Along with the continuous development of the technical level of electronic products and the continuous improvement of the reliability requirements, the random vibration test becomes one of key test items for the identification or the inspection of the electronic products. The purpose of the vibration test is mainly to check the vibration resistance of the electronic product, so that accurate application of the vibration magnitude is important in the vibration test. The key factor influencing the vibration test effect of the electronic product is the vibration test clamp, the main function of the test clamp is to transfer the energy generated by the vibration table to the test piece, and one good clamp at least meets the following requirements: the test piece can be conveniently fixed on the vibration table top; in the whole test frequency range, the frequency response characteristic of the clamp is flat, and resonance coupling between the clamp and a product is avoided; the response of each connecting point on the connecting surface of the clamp and the electronic product is consistent as much as possible so as to ensure the uniformity of excitation input during test; the rigidity-mass ratio of the clamp is large enough; the design and processing period is short. The fixture attachment points fall into two categories: A. a fixed connection point between the clamp and the vibration table; B. and a fixed connection point between the clamp and the electronic product. Both types of fixed connection points should meet the following requirements: there should be no phase difference between the sine waves generated by the fixed points, that is to say the fixed points are substantially identical and move in a straight line. The fixed connection point between the clamp and the electronic product is the input point of vibration during actual use of the electronic product, the center of gravity of the clamp and the electronic product and the center of the test table top are overlapped as much as possible, the simpler the structure is, the better the structure is, and the contact surface between the clamp and the table top is flat. The detection point may be located on the fixture or the vibrating table or on the test piece, but is required to be as close to the fixing point as possible, and in any case the detection point must be rigidly connected to the fixing point. In general, an electronic product is installed on a vibration test stand through fixture connection, and vibration sensors for measurement or control are installed on front and rear or left and right end surfaces or upper surfaces of a table top of the vibration fixture, the positions of the vibration sensors are far away from the installation position of a tested electronic product test piece, the centers of the vibration sensors are not placed on the joint surface of the vibration fixture and the tested electronic product test piece, the number of the vibration sensors is 1-2, and due to the existence of position errors, the actual vibration magnitude and the expected value of the tested electronic product test piece are different, so that the vibration test magnitude of the tested electronic product test piece is inaccurate, and the phenomenon of over-test or under-test easily occurs.
Disclosure of Invention
The invention aims at solving the defect that the center of a vibration sensor is not placed on the joint surface of a vibration clamp and a tested electronic product test piece, the position of the vibration sensor is far away from the mounting position of the tested electronic product test piece, and the actual vibration value of the tested electronic product test piece is greatly different from the measured value of the vibration sensor.
In order to achieve the above object, the present invention needs to achieve the following technical solutions. A verification method of vibration magnitude of electronic products is provided, which has the following technical characteristics: aiming at the situation that the center of a vibration sensor is not placed on the joint surface of a vibration clamp and a tested electronic product test piece, the position of the vibration sensor is far away from the mounting position of the tested electronic product test piece, the tested electronic product test piece is fixed between positioning strips on the wide sides of a rectangular rigid platform of the vibration clamp, rectangular grooves which are tightly attached to four opposite corners of the tested electronic product test piece are manufactured at two ends of each positioning strip, L-shaped corner plates which are tightly attached to corners of the tested electronic product test piece are fixed in each rectangular groove, and the vibration sensor is respectively mounted on each L-shaped corner plate to form four corner check points; the center point of the vibration sensor is positioned on the interface of the L-shaped angle plate and the rectangular groove and is positioned on the combined end surface of the tested electronic product test piece and the vibration clamp; and taking the vibration average value measured by the vibration sensors arranged on the four check points as an excitation input value of a test, checking the vibration magnitude of the tested electronic product test piece through the vibration table control equipment, transmitting stress generated by vibration of the tested electronic product test piece to the vibration sensor, and transmitting the vibration test control magnitude to a display of the vibration table control equipment by the vibration sensor to display the check value.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, four diagonal rectangular grooves which are closely attached to the tested electronic product test piece are arranged on each connecting point on the tested electronic product test piece connecting surface of the integrally cast rectangular platform vibration isolation area with high rigidity and mass, four vibration sensors are respectively arranged to form symmetrical four-point control, and the vibration average value of the four control points is taken as the excitation input value of the test, so that the response of each connecting point on the connecting surface is consistent, and the uniformity of excitation input during the test is ensured. And each rectangular groove is provided with an L-shaped angle plate which is close to the corner of the tested electronic product test piece, so that the vibration clamp has higher natural frequency, the gradual vibration rate of vibration is reduced, the purpose of restraining resonance is achieved, the stress generated by vibration of the tested electronic product test piece is faithfully transmitted to the vibration sensor at the fixed point of the tested electronic product test piece, the mounting position of the tested electronic product test piece is provided, the rectangular groove of the vibration sensor is mounted more conveniently, and the vibration magnitude of the tested electronic product test piece is measured or controlled more accurately.
The vibration average value of the four control points is taken as the excitation input value of the test, so that the position error of the control points is eliminated, and the control precision of the vibration test is improved.
Drawings
FIG. 1 is a diagram of a vibratory fixture with rectangular groove check points for L-shaped gussets according to the present invention.
In the figure: the test device comprises an L-shaped angle plate, a rectangular groove, a vibration clamp, a vibration sensor and a tested electronic product test piece.
Detailed Description
See fig. 1. According to the invention, aiming at the situation that the center of a vibration sensor 4 is not placed on the joint surface of a vibration clamp 3 and a tested electronic product test piece 5, the vibration sensor 4 is far away from the installation position of the tested electronic product test piece 5, the tested electronic product test piece 5 is fixed between positioning strips on the wide sides of a rectangular rigid platform of the vibration clamp 3, rectangular grooves 2 which are tightly attached to four opposite angles of the tested electronic product test piece are manufactured on the two ends of each positioning strip, L-shaped angle plates 1 which are tightly attached to corners of the tested electronic product test piece 5 are fixed in each rectangular groove 2, and the vibration sensor 4 is respectively installed on each L-shaped angle plate 1 to form four corner check points; and taking the vibration average value measured by the vibration sensors 4 arranged on the four check points as an excitation input value of a test, checking the vibration magnitude of the tested electronic product test piece 5 through the vibration table control equipment, transmitting stress generated by vibration of the tested electronic product test piece 5 to the vibration sensor 4, and transmitting the vibration test control magnitude to a display of the vibration table control equipment by the vibration sensor 4 to display the check value.
The vibration fixture 3 is a rectangular cube rigid platform with an integral casting structure, and the test piece 5 of the electronic product is fixedly restrained by positioning strips on the wide sides of the test piece. The vibration clamp 3 is connected with the vibration table through a mounting hole connected with the vibration table, and is connected with the tested electronic product test piece 5 through a mounting hole connected with the tested electronic product test piece 5. The rectangular groove 2 is arranged on the vibration isolation area of the rectangular rigid platform, the tested electronic product test piece 5 is tightly attached to the rectangular rigid platform, and the L-shaped angle plate 1 and the rectangular groove 2 are distributed beside the mounting hole of the tested electronic product test piece 5. The rectangular groove 2 is arranged beside the mounting hole of the tested electronic product test piece 5, the center point of the vibration sensor 4 which is fixed in the rectangular groove 2 and mounted on the L-shaped angle plate 1 is positioned at the interface between the L-shaped angle plate 1 and the rectangular groove 2, and rectangular groove check points for checking the tested electronic product test piece 5 at four corners are formed.
The working principle of the embodiment is as follows: the vibration sensor 4 is installed on the tested electronic product test piece 5 through the L-shaped angle plate 1 in the rectangular groove 2, so that the center point of the vibration sensor 4 is positioned on the combined end face of the tested electronic product test piece 5 and the vibration clamp 3, and the position, which is far from the joint of the tested electronic product test piece 5 and the vibration clamp 3, is very close to the joint, and the actual vibration magnitude of the tested electronic product test piece 5 can be reflected more truly. Four symmetrical vibration sensors 4 are arranged in total, and the average value of the measured values of the four points is taken as the vibration test control value of the tested electronic product test piece 5, so that the vibration value of the tested electronic product test piece 5 can be controlled more accurately.
While the invention has been described in detail in connection with the drawings, it should be understood that the foregoing is only illustrative of the preferred embodiment of the invention and is not intended to limit the invention thereto, but rather that various modifications, equivalents, improvements and substitutions can be made therein by those skilled in the art without departing from the spirit and principles of the invention, and are intended to be included within the scope of the appended claims.
Claims (5)
1. A verification method of vibration magnitude of electronic products is provided, which has the following technical characteristics: aiming at the situation that the center of a vibration sensor (4) is not placed on the joint surface of a vibration clamp (3) and a tested electronic product test piece (5), the vibration sensor (4) is far away from the mounting position of the tested electronic product test piece (5), the tested electronic product test piece (5) is fixed between positioning strips on the two sides of a rectangular rigid platform of the vibration clamp (3), rectangular grooves (2) which are tightly attached to four opposite angles of the tested electronic product test piece are manufactured at two ends of each positioning strip, L-shaped corner plates (1) which are tightly attached to corners of the tested electronic product test piece (5) are fixed in each rectangular groove (2), and the vibration sensor (4) is respectively mounted on each L-shaped corner plate (1) to form four corner check points; the center point of the vibration sensor (4) is positioned on the interface of the L-shaped angle plate (1) and the rectangular groove (2) and is positioned on the combined end surface of the tested electronic product test piece (5) and the vibration clamp (3); and taking the vibration average value measured by the vibration sensors (4) arranged on the four check points as an excitation input value of a test, checking the vibration magnitude of the tested electronic product test piece (5) through the vibration table control equipment, transmitting stress generated by vibration of the tested electronic product test piece (5) to the vibration sensors (4), and transmitting the vibration test control magnitude to a display of the vibration table control equipment by the vibration sensors (4) to display the check value.
2. The method for verifying the vibration level of an electronic product according to claim 1, wherein: the vibration clamp (3) is a rectangular cube rigid platform with an integral casting structure, and the tested electronic product test piece (5) is fixedly restrained by positioning strips on the wide sides of the test piece.
3. The method for verifying the vibration level of an electronic product according to claim 2, wherein: the vibration clamp (3) is connected with the vibration table through a mounting hole connected with the vibration table, and is connected with the tested electronic product test piece (5) through a mounting hole connected with the tested electronic product test piece (5).
4. A method of verifying the vibration level of an electronic product as defined in claim 3, wherein: the rectangular groove (2) is arranged on the vibration isolation area of the rectangular rigid platform, the tested electronic product test piece (5) is tightly attached to the rectangular rigid platform, and the L-shaped angle plate (1) and the rectangular groove (2) are distributed beside the mounting hole of the tested electronic product test piece (5).
5. The method for verifying the vibration level of an electronic product according to claim 4, wherein: four symmetrical vibration sensors (4) are arranged in total, and the average value of the measured values of the four points is taken as the vibration test control value of the tested electronic product test piece (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910395132.1A CN110068437B (en) | 2019-05-13 | 2019-05-13 | Method for checking vibration magnitude of electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910395132.1A CN110068437B (en) | 2019-05-13 | 2019-05-13 | Method for checking vibration magnitude of electronic product |
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| Publication Number | Publication Date |
|---|---|
| CN110068437A CN110068437A (en) | 2019-07-30 |
| CN110068437B true CN110068437B (en) | 2023-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910395132.1A Active CN110068437B (en) | 2019-05-13 | 2019-05-13 | Method for checking vibration magnitude of electronic product |
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| Country | Link |
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| CN (1) | CN110068437B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114570670B (en) * | 2022-05-06 | 2022-08-05 | 张家港保税区亚鑫精密制管有限公司 | Necking pipe fitting necking strength detection tool |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1144606A (en) * | 1997-07-25 | 1999-02-16 | Emitsuku Kk | Vibration generator |
| KR19990009517U (en) * | 1997-08-22 | 1999-03-15 | 정몽규 | Jig for Vibration Intensity Measurement |
| JP2010164189A (en) * | 2009-01-19 | 2010-07-29 | Lintec 21:Kk | Goods fixture with vibration sensor |
| CN102818688A (en) * | 2012-08-27 | 2012-12-12 | 中国矿业大学 | Loading device and method of vibration test of imitating flexible member |
| CN205049307U (en) * | 2015-10-12 | 2016-02-24 | 法雷奥汽车内部控制（深圳）有限公司 | A acceleration sensor mounting fixture for vibration testing |
| CN106289687A (en) * | 2015-06-23 | 2017-01-04 | 北京强度环境研究所 | A kind of electric vibration table general switching vibration test fixture |
| CN206002201U (en) * | 2016-08-19 | 2017-03-08 | 中国电子科技集团公司第十一研究所 | A kind of Infrared Detectors vibration tong |
| CN206627206U (en) * | 2017-03-16 | 2017-11-10 | 中建四局第三建筑工程有限公司 | A kind of Tunnel Blasting vibration measurement instrument fixing device |
| CN208751704U (en) * | 2018-07-20 | 2019-04-16 | 中国航发哈尔滨东安发动机有限公司 | A kind of aviation igniter resonance point detection device |
-
2019
- 2019-05-13 CN CN201910395132.1A patent/CN110068437B/en active Active
Patent Citations (9)
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|---|---|---|---|---|
| JPH1144606A (en) * | 1997-07-25 | 1999-02-16 | Emitsuku Kk | Vibration generator |
| KR19990009517U (en) * | 1997-08-22 | 1999-03-15 | 정몽규 | Jig for Vibration Intensity Measurement |
| JP2010164189A (en) * | 2009-01-19 | 2010-07-29 | Lintec 21:Kk | Goods fixture with vibration sensor |
| CN102818688A (en) * | 2012-08-27 | 2012-12-12 | 中国矿业大学 | Loading device and method of vibration test of imitating flexible member |
| CN106289687A (en) * | 2015-06-23 | 2017-01-04 | 北京强度环境研究所 | A kind of electric vibration table general switching vibration test fixture |
| CN205049307U (en) * | 2015-10-12 | 2016-02-24 | 法雷奥汽车内部控制（深圳）有限公司 | A acceleration sensor mounting fixture for vibration testing |
| CN206002201U (en) * | 2016-08-19 | 2017-03-08 | 中国电子科技集团公司第十一研究所 | A kind of Infrared Detectors vibration tong |
| CN206627206U (en) * | 2017-03-16 | 2017-11-10 | 中建四局第三建筑工程有限公司 | A kind of Tunnel Blasting vibration measurement instrument fixing device |
| CN208751704U (en) * | 2018-07-20 | 2019-04-16 | 中国航发哈尔滨东安发动机有限公司 | A kind of aviation igniter resonance point detection device |
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| CN110068437A (en) | 2019-07-30 |
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