CN203672315U - Stress-strain test system for printed circuit board - Google Patents
Stress-strain test system for printed circuit board Download PDFInfo
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- CN203672315U CN203672315U CN201320636542.9U CN201320636542U CN203672315U CN 203672315 U CN203672315 U CN 203672315U CN 201320636542 U CN201320636542 U CN 201320636542U CN 203672315 U CN203672315 U CN 203672315U
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Abstract
The utility model discloses a stress-strain test system for a printed circuit board. The system comprises a strain sensor, a strain tester and an upper computer mechanism, wherein the strain sensor is attached to the printed circuit board and is connected with the strain tester, and the strain tester is connected with the upper computer mechanism. Compared with the prior art, the stress-strain test system provided by the utility model is capable of monitoring the strain of the circuit board in real time, and has the advantages of good dynamic response and high precision.
Description
Technical field
The utility model relates to stress-strain test field, exactly refers to a kind of printed circuit board stress-strain test system.
Background technology
Along with constantly bringing forth new ideas of scientific and technical development and the theory of testing, new engineering stress strain testing method is also at continuous development and progress, and nowadays, application more widely method of testing is static strain testing and dynamic strain measuring.Because the strain facies of circuit board solder joint is more small and change rapidly than the object of other industry, use general static strain testing method not meet the demands, and high-accuracy property and the destructible of this electronic product, also make the method for conventional dynamic strain measuring be difficult in real time the strained situation of circuit board be carried out to real-time monitoring, can not meet the demand of technical development.
Utility model content
For above-mentioned defect, the technical matters that the utility model solves is to provide a kind of printed circuit board stress-strain test system, can carry out real-time monitoring to the strained situation of circuit board in real time, has that dynamic response is good, precision advantages of higher.
In order to solve above technical matters, the printed circuit board stress-strain test system that the utility model provides, it is characterized in that, comprise strain transducer, strain testing instrument and host computer mechanism, described strain transducer is attached on printed circuit board, described strain transducer is connected with described strain testing instrument, and described strain testing instrument is connected with described host computer mechanism; Wherein:
Described strain transducer comprises basal disc, sensitive grid and laminated film from bottom to up successively, and described sensitive grid is arranged between described basal disc and described laminated film;
Described strain testing instrument comprises data collecting card, switching power supply, total line traffic control kerve and connection terminal, wherein:
Described connection terminal is connected with the metallic resistance sheet of described strain transducer as data connector, and described connection terminal is connected the wire of metal strain plate with the collection port of data collecting card; Described data collecting card is arranged on described total line traffic control kerve, described data collecting card is that the simulated data of metallic resistance sheet is converted to numerical data collection, and described total line traffic control kerve is that all data collecting cards are powered and make all data collecting card signal and communications synchronous; Described switching power supply is connected with described total line traffic control kerve, and described switching power supply, for stablizing input voltage, converts civil power 220V alternating current to the 12V direct current of stable output, is total line traffic control kerve power supply;
Described data collecting card comprises analog-to-digital conversion module, anti-aliasing filter module, data calibration module, Wheatstone bridge module, data acquisition module and power failure protection module, described signal, after analog-to-digital conversion module, anti-aliasing filter module, data calibration module, Wheatstone bridge resume module, gathers in data acquisition module; Described analog-to-digital conversion module is converted to the simulating signal of sensor the digital signal that computing machine uses; The built-in analog-and digital-filtering of described anti-aliasing filter module, by passband smoothness and the logical inband signaling of phase nonlinear degree quantificational expression, be without aliasing signal or at least suppress through stopband the signal filtering without all signals in aliasing bandwidth range, preventing aliasing; Described data calibration modular calibration circuit is made up of a precision resister and a software control switch, and they link together by 1/4 resistor bridge; Balanced bridge of described Wheatstone bridge module composition, accurately measures the variation of arm resistance value, can measure the change in resistance of metal resistance strain gauge; Described data acquisition module gathers buffer memory to data; The pulse that described power failure protection module can produce instant high-voltage in the time of the unexpected power-off of power supply, can burn out the precision element in plate, and this module effect is the insulation blocking to this high voltage pulse;
Described host computer mechanism comprises that strain transducer basic parameter arranges module, data acquisition control display module, data analysis processes and displays module and data sheet and derives module, strain transducer basic parameter arranges module for strain transducer basic parameter is set, described data acquisition control display module is for controlling and show the information of data acquisition, described data analysis processes and displays module is for analysis, processing and the demonstration of data, and described data sheet is derived module for derived data form.
Preferably, described sensitive grid is metallic resistance sheet.
Preferably, described basal disc is plastic sheeting.
Preferably, described strain testing instrument also comprises casing, and described connection terminal is arranged on described casing, and described data collecting card, switching power supply and total line traffic control kerve are arranged in described casing.
Preferably, described Wheatstone bridge module is 1/4 bridge-type Wheatstone bridge, the Wheatstone bridge of semibridge system or the Wheatstone bridge of full-bridge type.
Compared with prior art, the printed circuit board stress-strain test system that the utility model provides, use test macro and the narrow foil gauge of volume of Dynamic High-accuracy strain, can be to circuit-under-test plate the stressing conditions real-time data acquisition at each station, sampling rate, up to 10KHz, has accomplished the strained situation of tested circuit board to carry out real-time monitoring.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of printed circuit board stress-strain test system in the utility model embodiment;
Fig. 2 is the structural representation of strain transducer in the utility model embodiment printed circuit board stress-strain test system;
Fig. 3 is the structured flowchart of strain testing instrument in the utility model embodiment printed circuit board stress-strain test system;
Fig. 4 is the structured flowchart of host computer mechanism in the utility model embodiment printed circuit board stress-strain test system.
Embodiment
For those skilled in the art can understand technical scheme provided by the utility model better, set forth below in conjunction with specific embodiment.
Stress: object is due to external cause (stressed, temperature variation etc.) and when deformation, produce interactional internal force in object between each several part, and to resist the effect of this external cause, this internal force is called stress.
Strain: be defined as the unit length deflection producing when a minute materials element meets with stresses in mechanics.
Strain effect: when conductor or semiconductor material produce mechanically deform under the effect of extraneous power, its resistance value is corresponding to change, and this phenomenon is called " strain effect ".
Strain electrical measuring method: be the surface strain of measuring structure with strain ga(u)ge, determining a kind of Analysis of Experimental Stress method that builds surface stress according to strain-stress relation.
Wheatstone bridge: electric bridge is combined by four substitutional resistances (one of them is resistance strain gage), no matter inputs much voltage, and output voltage is always 0 volt, and this state is called equilibrium state.If balance is destroyed, will produce the output voltage corresponding with resistance variations.Be applicable to detect the resistance subtle change of foil gauge.
Refer to Fig. 1-Fig. 4, Fig. 1 is the structured flowchart of printed circuit board stress-strain test system in the utility model embodiment; Fig. 2 is the structural representation of strain transducer in the utility model embodiment printed circuit board stress-strain test system; Fig. 3 is the structured flowchart of strain testing instrument in the utility model embodiment printed circuit board stress-strain test system; Fig. 4 is the structured flowchart of host computer mechanism in the utility model embodiment printed circuit board stress-strain test system.
The printed circuit board stress-strain test system that the utility model embodiment provides, comprise strain transducer, strain testing instrument and host computer mechanism, strain transducer is attached on printed circuit board, and strain transducer is connected with strain testing instrument, and strain testing instrument is connected with host computer mechanism; Wherein:
Strain transducer comprises basal disc 3, sensitive grid 2 and laminated film 1 from bottom to up successively, and sensitive grid 2 is metallic resistance sheet, and basal disc 3 is plastic sheeting, and sensitive grid 2 is arranged between basal disc 3 and laminated film 1;
Strain testing instrument comprises data collecting card, switching power supply, total line traffic control kerve and connection terminal, wherein:
Described connection terminal is connected with the metallic resistance sheet of described strain transducer as data connector, and described connection terminal is connected the wire of metal strain plate with the collection port of data collecting card; Described data collecting card is arranged on described total line traffic control kerve, described data collecting card is that the simulated data of metallic resistance sheet is converted to numerical data collection, and described total line traffic control kerve is that all data collecting cards are powered and make all data collecting card signal and communications synchronous; Described switching power supply is connected with described total line traffic control kerve, and described switching power supply, for stablizing input voltage, converts civil power 220V alternating current to the 12V direct current of stable output, is total line traffic control kerve power supply;
Described data collecting card comprises analog-to-digital conversion module, anti-aliasing filter module, data calibration module, Wheatstone bridge module, data acquisition module and power failure protection module, described signal, after analog-to-digital conversion module, anti-aliasing filter module, data calibration module, Wheatstone bridge resume module, gathers in data acquisition module; Described analog-to-digital conversion module is converted to the simulating signal of sensor the digital signal that computing machine uses; The built-in analog-and digital-filtering of described anti-aliasing filter module, by passband smoothness and the logical inband signaling of phase nonlinear degree quantificational expression, be without aliasing signal or at least suppress through stopband the signal filtering without all signals in aliasing bandwidth range, preventing aliasing; Described data calibration modular calibration circuit is made up of a precision resister and a software control switch, and they link together by 1/4 resistor bridge; Balanced bridge of described Wheatstone bridge module composition, accurately measures the variation of arm resistance value, can measure the change in resistance of metal resistance strain gauge; Described data acquisition module gathers buffer memory to data; The pulse that described power failure protection module can produce instant high-voltage in the time of the unexpected power-off of power supply, can burn out the precision element in plate, and this module effect is the insulation blocking to this high voltage pulse;
Host computer mechanism comprises that strain transducer basic parameter arranges module, data acquisition control display module, data analysis processes and displays module and data sheet and derives module, strain transducer basic parameter arranges module for strain transducer basic parameter is set, data acquisition control display module is for controlling and show the information of data acquisition, data analysis processes and displays module is for analysis, processing and the demonstration of data, and data sheet is derived module for derived data form;
Wherein:
Strain transducer basic parameter arranges module to be had and strain transducer title, sample paste position, the configuration of strain transducer bridge type, strain transducer resistance, strain factor setting, physical channel configuration, wire resistance are set, automatically identify available channel, call the function of configuration file;
Data acquisition control display module have gather before all channel correctings make zero, gatherer process figure shows, preserves test data in real time, support various alarm settings, support strain and strain rate gathers simultaneously, colored 2D density map shows numeric distribution, the function of filtering, sampling rate setting, monodrome demonstration, initial parameter setting recording, spread signal collection;
Data analysis processes and displays module have to save data process, watch data details, set bound alarming value and judge, function that software filtering, FFT spectrum analysis, power spectrumanalysis, probability and Density Distribution analysis, cepstrum analysis, customization functional analysis, analysis result support are preserved separately;
Data sheet derive module have import save data derive in real time the form forms such as Excel, ASCII, CVS, acquiescence report form template comprise the content such as test man's title, foil gauge parameter, can derive separately photo print and check, can select wherein certain segment data to derive, can select the function that wherein data of certain strain transducer derive.
Strain testing instrument also comprises casing, and connection terminal is arranged on casing, and data collecting card, switching power supply and total line traffic control kerve are arranged in casing.
What the Wheatstone bridge module of the utility model embodiment adopted is the Wheatstone bridge of 1/4 bridge-type.In addition, the utility model can also carry out the impact of factor on strain sheet resistance such as temperature in offset measurement process with the Wheatstone bridge of half-bridge and full-bridge.
Compared with prior art, the printed circuit board stress-strain test system that the utility model provides, use test macro and the narrow foil gauge of volume of Dynamic High-accuracy strain, can be to circuit-under-test plate the stressing conditions real-time data acquisition at each station, sampling rate, up to 10KHz, has accomplished the strained situation of tested circuit board to carry out real-time monitoring.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to the multiple modification of these embodiment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a printed circuit board stress-strain test system, it is characterized in that, comprise strain transducer, strain testing instrument and host computer mechanism, described strain transducer is attached on printed circuit board, described strain transducer is connected with described strain testing instrument, and described strain testing instrument is connected with described host computer mechanism; Wherein:
Described strain transducer comprises basal disc, sensitive grid and laminated film from bottom to up successively, and described sensitive grid is arranged between described basal disc and described laminated film;
Described strain testing instrument comprises data collecting card, switching power supply, total line traffic control kerve and connection terminal, wherein:
Described connection terminal is connected with the metallic resistance sheet of described strain transducer as data connector, and described connection terminal is connected the wire of metal strain plate with the collection port of data collecting card; Described data collecting card is arranged on described total line traffic control kerve, described data collecting card is that the simulated data of metallic resistance sheet is converted to numerical data collection, and described total line traffic control kerve is that all data collecting cards are powered and make all data collecting card signal and communications synchronous; Described switching power supply is connected with described total line traffic control kerve, and described switching power supply, for stablizing input voltage, converts civil power 220V alternating current to the 12V direct current of stable output, is total line traffic control kerve power supply;
Described data collecting card comprises analog-to-digital conversion module, anti-aliasing filter module, data calibration module, Wheatstone bridge module, data acquisition module and power failure protection module, described signal, after analog-to-digital conversion module, anti-aliasing filter module, data calibration module, Wheatstone bridge resume module, gathers in data acquisition module; Described analog-to-digital conversion module is converted to the simulating signal of sensor the digital signal that computing machine uses; The built-in analog-and digital-filtering of described anti-aliasing filter module, by passband smoothness and the logical inband signaling of phase nonlinear degree quantificational expression, be without aliasing signal or at least suppress through stopband the signal filtering without all signals in aliasing bandwidth range, preventing aliasing; Described data calibration modular calibration circuit is made up of a precision resister and a software control switch, and they link together by 1/4 resistor bridge; Balanced bridge of described Wheatstone bridge module composition, accurately measures the variation of arm resistance value, can measure the change in resistance of metal resistance strain gauge; Described data acquisition module gathers buffer memory to data; The pulse that described power failure protection module can produce instant high-voltage in the time of the unexpected power-off of power supply, can burn out the precision element in plate, and this module effect is the insulation blocking to this high voltage pulse;
Described host computer mechanism comprises that strain transducer basic parameter arranges module, data acquisition control display module, data analysis processes and displays module and data sheet and derives module, strain transducer basic parameter arranges module for strain transducer basic parameter is set, described data acquisition control display module is for controlling and show the information of data acquisition, described data analysis processes and displays module is for analysis, processing and the demonstration of data, and described data sheet is derived module for derived data form.
2. printed circuit board stress-strain test system according to claim 1, is characterized in that, described sensitive grid is metallic resistance sheet.
3. printed circuit board stress-strain test system according to claim 1, is characterized in that, described basal disc is plastic sheeting.
4. printed circuit board stress-strain test system according to claim 1, it is characterized in that, described strain testing instrument also comprises casing, described connection terminal is arranged on described casing, and described data collecting card, switching power supply and total line traffic control kerve are arranged in described casing.
5. printed circuit board stress-strain test system according to claim 1, is characterized in that, Wheatstone bridge, the Wheatstone bridge of semibridge system or the Wheatstone bridge of full-bridge type that described Wheatstone bridge module is 1/4 bridge-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320636542.9U CN203672315U (en) | 2013-10-15 | 2013-10-15 | Stress-strain test system for printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320636542.9U CN203672315U (en) | 2013-10-15 | 2013-10-15 | Stress-strain test system for printed circuit board |
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| Publication Number | Publication Date |
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| CN203672315U true CN203672315U (en) | 2014-06-25 |
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| CN201320636542.9U Withdrawn - After Issue CN203672315U (en) | 2013-10-15 | 2013-10-15 | Stress-strain test system for printed circuit board |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528493A (en) * | 2013-10-15 | 2014-01-22 | 顾捷 | Stress-strain test system for printed circuit board |
| CN105628268A (en) * | 2015-12-22 | 2016-06-01 | 福建联迪商用设备有限公司 | System and method of testing POS equipment safety contact pressure |
| CN105675413A (en) * | 2016-01-18 | 2016-06-15 | 伟创力制造（珠海）有限公司 | Method of evaluating stress life of circuit board |
| WO2016197645A1 (en) * | 2016-01-08 | 2016-12-15 | 中兴通讯股份有限公司 | Electronic device, and method and system for compensating stress-sensitive parameter |
| CN112504111A (en) * | 2020-11-25 | 2021-03-16 | 上海材料研究所 | Strain test system and method for flexible piezoelectric device |
-
2013
- 2013-10-15 CN CN201320636542.9U patent/CN203672315U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528493A (en) * | 2013-10-15 | 2014-01-22 | 顾捷 | Stress-strain test system for printed circuit board |
| CN103528493B (en) * | 2013-10-15 | 2016-04-13 | 顾捷 | A kind of printed circuit board stress-strain test system |
| CN105628268A (en) * | 2015-12-22 | 2016-06-01 | 福建联迪商用设备有限公司 | System and method of testing POS equipment safety contact pressure |
| CN105628268B (en) * | 2015-12-22 | 2018-08-14 | 福建联迪商用设备有限公司 | POS machine safety contact pressure testing system and test method |
| WO2016197645A1 (en) * | 2016-01-08 | 2016-12-15 | 中兴通讯股份有限公司 | Electronic device, and method and system for compensating stress-sensitive parameter |
| CN106960067A (en) * | 2016-01-08 | 2017-07-18 | 中兴通讯股份有限公司 | A kind of electronic installation, the compensation method of stress sensitive parameter and system |
| US11140771B2 (en) | 2016-01-08 | 2021-10-05 | Xi'an Zhongxing New Software Co., Ltd. | Electronic device, and method and system for compensating stress-sensitive parameter |
| CN105675413A (en) * | 2016-01-18 | 2016-06-15 | 伟创力制造（珠海）有限公司 | Method of evaluating stress life of circuit board |
| CN105675413B (en) * | 2016-01-18 | 2019-12-10 | 伟创力制造（珠海）有限公司 | method for evaluating stress life of circuit board |
| CN112504111A (en) * | 2020-11-25 | 2021-03-16 | 上海材料研究所 | Strain test system and method for flexible piezoelectric device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model patent |
Correction item: Second applicant Correct: Guangzhou Jumho Electric Co., Ltd. False: Zhanghe, Guangzhou Electric Appliance Equipment Co., Ltd Number: 26 Page: The title page Volume: 30 |
|
| CU03 | Correction of utility model patent gazette |
Correction item: Second applicant Correct: Guangzhou Jumho Electric Co., Ltd. False: Zhanghe, Guangzhou Electric Appliance Equipment Co., Ltd Number: 26 Volume: 30 |
|
| ERR | Gazette correction |
Free format text: CORRECT: THE SECOND APPLICANT; FROM: JUMHO ELECTRIC GUANGZHOU CO., LTD. TO: GUANGZHOU JUMHO ELECTRIC CO., LTD. |
|
| RECT | Rectification | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140625 Effective date of abandoning: 20160413 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |