CN204855565U - Paster device square wave experiment test fixture - Google Patents
Paster device square wave experiment test fixture Download PDFInfo
- Publication number
- CN204855565U CN204855565U CN201520414670.8U CN201520414670U CN204855565U CN 204855565 U CN204855565 U CN 204855565U CN 201520414670 U CN201520414670 U CN 201520414670U CN 204855565 U CN204855565 U CN 204855565U
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- CN
- China
- Prior art keywords
- microstrip line
- box body
- square wave
- test fixture
- earthing block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model provides a paster device square wave experiment test fixture, include metal preparation shielding with box body and microstrip line subassembly, the fixing device of setting in the box body, the box body include lateral wall, upper cover, bottom plate, the microstrip line subassembly include filling block, ground connection piece, first microstrip line, second microstrip line, fixing device include base, clamp and locking cap, test fixture has solved SMD device and has carried out the problem that square wave injection experiment lacks test fixture for carry out SMD device square wave and pour into the experiment into.
Description
Technical field
The utility model relates to surface-mounted device technical field of measurement and test, particularly relates to a kind of surface-mounted device square wave experiment test fixture.
Background technology
Along with the development of electronic technology, microelectronic component develops rapidly towards integrated, microminiaturized, low-power consumption, intellectuality, but its electronics faced threatens but more and more serious.Need to carry out electromagnetic susceptibility experiment to microelectronic component for this reason, obtain its damage threshold, set up damage model, analyze its micromechanism of damage, and then improvement microelectronic component electromagnetism interference performance.The features such as fast, pulsewidth is narrower, test method is simple are risen because square wave has on forward position, can be device and set up unified failure criteria and the expression formula of failure threshold, be convenient to carry out vulnerability analysis to system, therefore domestic and international when studying electromagnetic susceptibility and the damage threshold of device, usually adopt the method for square-wave voltage or pulse current injectingt to determine.
At present, be not specifically designed to the fixture that SMD device carries out Square wave injection experiment, in testing, inevitably cause test error in welding device process, affect the accuracy of test result; When injecting square-wave voltage up to upper kilovolt, because surface-mounted device lead pin pitch is less, easily to cause between pin air breakdown electric discharge, the radiation field that square wave produces in addition can affect measured device, and transmission line impedance is not mated high frequency can be caused to reflect; A kind of SMD device square wave experiment test fixture is devised for overcoming the above problems.
Utility model content
The required technical matters solved of the utility model is to provide a kind of surface-mounted device square wave experiment test fixture, solve SMD device pin spacing less, when injecting square-wave voltage up to upper kilovolt, the problem of the breakdown electric discharge of air between pin, the radiation field that square wave produces can affect the problem of measured device, and transmission line impedance does not mate the problem causing high frequency to reflect; For carrying out the experiment of SMD device Square wave injection.
The technical solution of the utility model is: a kind of surface-mounted device square wave experiment test fixture, comprise microstrip line assembly, stationary installation that metal makes shielding box body and is arranged in box body, it is characterized in that: described box body comprises the sidewall of a week, the upper cover that can raise, is fixed on the base plate of side wall lower ends;
Described microstrip line assembly comprises the filling block that the insulator be placed on base plate makes, the earthing block made at one deck conductor of filling block upper surface tiling, the sidewall contact conducting of this earthing block outer edge and box body;
The first microstrip line that a level runs through this earthing block center is at least embedded with in this earthing block, the sidepiece of this first microstrip line is provided with insulating isolation belt and earthing block is isolated, and the outer end of the first microstrip line is connected conducting with the heart yearn being arranged on coaxial cable adapter on box side wall;
Second microstrip line from sensing center, edge of a pair symmetry is at least also provided with in the middle part of this earthing block, the both sides of this second microstrip line and the inner are provided with insulating isolation belt and earthing block and the first microstrip line and isolate, and the outer end of the second microstrip line is connected conducting with the heart yearn being arranged on coaxial cable adapter on box side wall;
Described stationary installation is provided with clamp and the locking cap of the pedestal be fixedly connected with box body and the free end being arranged on this pedestal, and locking cap can just to conducting block central pressing;
Be provided with the accommodating chamber of depression in the middle part of locking cap lower surface, be provided with above-mentioned first microstrip line, the second microstrip line in the radial indentation of earthing block central distribution form fit at accommodating chamber periphery;
The pedestal of described stationary installation is provided with holddown spring and depression bar, and holddown spring is supported on one end of depression bar, and described clamp is connected with the other end of depression bar, and the elastic force of spring passes to described locking cap by depression bar, clamp;
Described box body is quadrangle box, and the first described microstrip line is one, the second microstrip line is a pair, and the first microstrip line and the second microstrip line are arranged vertically.
The technique effect of this utility model
The utility model provides a kind of surface-mounted device Square wave injection experiment test fixture, can by the coaxial cable adapter of metal case by Square wave injection, by stationary installation, surface-mounted device is fixed, surface-mounted device pin and microstrip line is made to form good electrical connection, also the tedious work needing to weld is eliminated in conventionally test, be connected with oscillograph by corresponding adapter, realize Real-Time Monitoring injected pulse waveform.Adopt locking cap to be isolated by surface-mounted device pin, can prevent from injecting that square-wave voltage is too high to make between device pin air breakdown electric discharge.Metal shielding box solves the radiation field of square wave generation to the impact of survey device under test.50 Europe coupling microstrip lines solve the problem that transmission line impedance does not mate the high frequency reflection caused.In addition, the structure of described test fixture is simple, and volume is little, easy to make, and cost is low, has and promotes preferably and prospect of the application.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of this surface-mounted device Square wave injection experiment test fixture;
Fig. 2 is the plan structure schematic diagram of Fig. 1;
Fig. 3 is the B-B cross-sectional view of Fig. 2;
Fig. 4 is the perspective view of microstrip line assembly;
Fig. 5 is the main TV structure schematic diagram of stationary installation;
Fig. 6 is the perspective view of stationary installation;
In figure upper cover, the 3. box body of sidewall, the 2. box body of 1. box bodys base plate, 4, coaxial cable adapter, 5. spring, 6. depression bar, 7. clamp, 8. locking cap, 9. pedestal, 10. filling block, 11. earthing blocks, 12. first microstrip lines, 13. insulating isolation belts, 14. second microstrip lines, 8-1. accommodating chamber, 8-2. breach.
Embodiment
See Fig. 1-6, a kind of surface-mounted device square wave experiment test fixture in figure, comprise microstrip line assembly, stationary installation that metal makes shielding box body and is arranged in box body, described box body comprises the sidewall of a week, the upper cover that can raise, is fixed on the base plate of side wall lower ends;
Described microstrip line assembly comprises the filling block that the insulator be placed on base plate makes, the earthing block made at one deck conductor of filling block upper surface tiling, the sidewall contact conducting of this earthing block outer edge and box body;
The first microstrip line that a level runs through this earthing block center is at least embedded with in this earthing block, the sidepiece of this first microstrip line is provided with insulating isolation belt and earthing block is isolated, and the outer end of the first microstrip line is connected conducting with the heart yearn being arranged on coaxial cable adapter on box side wall;
Second microstrip line from sensing center, edge of a pair symmetry is at least also provided with in the middle part of this earthing block, the both sides of this second microstrip line and the inner are provided with insulating isolation belt and earthing block and the first microstrip line and isolate, and the outer end of the second microstrip line is connected conducting with the heart yearn being arranged on coaxial cable adapter on box side wall;
Described stationary installation is provided with clamp and the locking cap of the pedestal be fixedly connected with box body and the free end being arranged on this pedestal, and locking cap can just to conducting block central pressing.
Be provided with the accommodating chamber of depression in the middle part of locking cap lower surface, be provided with above-mentioned first microstrip line, the second microstrip line in the radial indentation of earthing block central distribution form fit at accommodating chamber periphery.
The pedestal of described stationary installation is provided with holddown spring and depression bar, and holddown spring is supported on one end of depression bar, and described clamp is connected with the other end of depression bar, and the elastic force of spring passes to described locking cap by depression bar, clamp.
Described box body is quadrangle box, and the first described microstrip line is one, the second microstrip line is a pair, and the first microstrip line and the second microstrip line are arranged vertically.
The coaxial cable at the first microstrip line two ends is transferred, and first is connected with oscillograph, and one is connected with electromagnetic pulse injection side.
The present invention solves not have special SMD device to carry out Square wave injection experiment, devises a kind of surface-mounted device square wave experiment test fixture.For solving the air breakdown problem between the too high pin causing device under test of square wave sparking voltage, devise locking cap, can be placed in the accommodating chamber of locking cap by the main body of device under test, the pin of device under test is placed in each breach respectively, is isolated and comes between such pin.For avoiding the thermal effect of welding to the adverse effect of device, devise stationary installation.For solving the electromagnetic radiation field of square wave generation to the impact of device under test, employ metal shielding box, detachably, all there is a coaxial adapter to microstrip line fixed with metallic screw each side for the upper box cover of this metal shielding box and lower casing.Not mating for solving proving installation transmission line impedance the high frequency reflection problems caused, based on microstrip design principle, devising 50 Europe microstrip lines.
This test fixture has following features: convenient fixing measured device, makes measured device pin and microstrip line close contact, avoids because the thermal effect of welding is to the adverse effect of device; Isolating device pin, prevents the air between high electrical breakdown pin; The radiation field of isolation transient pulse, solves the radiation field of square wave generation to the impact of surveying device under test; Conveniently connecting oscillograph, achieving the Real-Time Monitoring to injecting square wave.In addition, the structure of described test fixture is simple, and volume is little, easy to make, and cost is low.
Apply specific case in this patent to set forth principle of the present utility model and embodiment thereof, different according to the encapsulation of tested surface-mounted device, test fixture can make corresponding amendment, and the explanation of above embodiment is only used to help to understand method of the present utility model and core concept thereof.It should be pointed out that for the person of ordinary skill of the art, can also carry out some improvement and modification to the utility model under the prerequisite not departing from principle of the present utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (3)
1. a surface-mounted device square wave experiment test fixture, comprise microstrip line assembly, stationary installation that metal makes shielding box body and is arranged in box body, it is characterized in that: described box body comprises the sidewall of a week, the upper cover that can raise, is fixed on the base plate of side wall lower ends;
Described microstrip line assembly comprises the filling block that the insulator be placed on base plate makes, the earthing block made at one deck conductor of filling block upper surface tiling, the sidewall contact conducting of this earthing block outer edge and box body;
The first microstrip line that a level runs through this earthing block center is at least embedded with in this earthing block, the sidepiece of this first microstrip line is provided with insulating isolation belt and earthing block is isolated, and the outer end of the first microstrip line is connected conducting with the heart yearn being arranged on coaxial cable adapter on box side wall;
Second microstrip line from sensing center, edge of a pair symmetry is at least also provided with in the middle part of this earthing block, the both sides of this second microstrip line and the inner are provided with insulating isolation belt and earthing block and the first microstrip line and isolate, and the outer end of the second microstrip line is connected conducting with the heart yearn being arranged on coaxial cable adapter on box side wall;
Described stationary installation is provided with clamp and the locking cap of the pedestal be fixedly connected with box body and the free end being arranged on this pedestal, and locking cap can just to conducting block central pressing;
Be provided with the accommodating chamber of depression in the middle part of locking cap lower surface, be provided with above-mentioned first microstrip line, the second microstrip line in the radial indentation of earthing block central distribution form fit at accommodating chamber periphery.
2. surface-mounted device square wave experiment test fixture according to claim 1, it is characterized in that: the pedestal of described stationary installation is provided with holddown spring and depression bar, holddown spring is supported on one end of depression bar, described clamp is connected with the other end of depression bar, and the elastic force of spring passes to described locking cap by depression bar, clamp.
3. surface-mounted device square wave experiment test fixture according to claim 1, it is characterized in that: described box body is quadrangle box, the first described microstrip line is one, the second microstrip line is a pair, the first microstrip line and the second microstrip line are arranged vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520414670.8U CN204855565U (en) | 2015-06-16 | 2015-06-16 | Paster device square wave experiment test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520414670.8U CN204855565U (en) | 2015-06-16 | 2015-06-16 | Paster device square wave experiment test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204855565U true CN204855565U (en) | 2015-12-09 |
Family
ID=54746103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520414670.8U Expired - Fee Related CN204855565U (en) | 2015-06-16 | 2015-06-16 | Paster device square wave experiment test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204855565U (en) |
-
2015
- 2015-06-16 CN CN201520414670.8U patent/CN204855565U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20160616 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |