CN209372981U - Common mode test fixture with stitch contact detection function - Google Patents
Common mode test fixture with stitch contact detection function Download PDFInfo
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- CN209372981U CN209372981U CN201821892121.1U CN201821892121U CN209372981U CN 209372981 U CN209372981 U CN 209372981U CN 201821892121 U CN201821892121 U CN 201821892121U CN 209372981 U CN209372981 U CN 209372981U
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- circuit board
- common mode
- test
- shell
- detection function
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Abstract
The utility model relates to testing equipment fields, more particularly to the common mode test fixture with stitch contact detection function, including shell, the intracorporal circuit board of shell is set, at least four signaling interfaces of circuit board are connected to and is mounted on the test position fix plate of circuit board, the shell side is additionally provided with a system control interface, at least three test probes are additionally provided on the circuit board, it is connected with a relay below the circuit board, cover lid is provided with outside the shell.The utility model provides a kind of detection accuracy the high common mode test fixture with stitch contact detection function.
Description
Technical field
The utility model relates to testing equipment fields, control more particularly to the common mode test with stitch contact detection function
Tool.
Background technique
For the common-mode noise of high frequency transformer, it seriously affects the use of mobile phone and tablet computer, and existing common mode is surveyed
The method of examination is the signal by directly loading specific frequency, waveform in tested primary, then uses dual channel oscilloscope
The voltage amplitude of secondary induction is detected as judgment basis.
A kind of high frequency transformer common-mode noise test method is disclosed in documents (CN201610458721), specifically
It is: transformer is individually splitted out, the size of the common-mode noise of high frequency transformer is judged by common-mode noise test circuit,
The square-wave generator and transformer and the transformer is believed that the test circuit is made of the main circuit of NEC555 and external circuit
Number driving and detection circuit composition, the problem of this method maximum is: when stitch and the tester probe appearance of tested transformer
When poor contact, test device cannot be identified and judgeed effectively, it is easy to cause defective products fail to judge erroneous judgement, non-defective unit misjudgement etc.
Problem is badly in need of a kind of high-precision method now to test the noise, while to engineering staff with practical advice.
Summary of the invention
In order to solve the above technical problems, the utility model provides, a kind of detection accuracy is high to contact detection function with stitch
Common mode test fixture.
The utility model adopts the following technical solution:
With stitch contact detection function common mode test fixture, including shell, be arranged in the intracorporal circuit board of shell, be connected to
At least four signaling interfaces of circuit board and the test position fix plate for being mounted on circuit board, the shell side are additionally provided with
One system control interface is additionally provided at least three test probes on the circuit board, is connected with one below the circuit board
Relay, the shell are provided with cover lid outside.
Further improvement to above-mentioned technical proposal is that four signaling interfaces are set as input interface, armature winding
Interface, secondary windings interface, feedback winding interface.
Further improvement to above-mentioned technical proposal is that the circuit board is connected to by least four first support copper posts
Bottom in the shell.
Further improvement to above-mentioned technical proposal is that the test position fix plate is connected by least four second support copper posts
It is connected to the circuit board.
Further improvement to above-mentioned technical proposal is that at least three are offered on the test position fix plate for the survey
Try the probe aperture of probe face.
Further improvement to above-mentioned technical proposal is that cover lid center is provided with one for testing probe and test
The aperture of positioning plate connection.
The utility model has the beneficial effects that
1, the utility model include shell, the intracorporal circuit board of shell is set, is connected to circuit board at least four signals
Interface and the test position fix plate for being mounted on circuit board, shell side are additionally provided with a system control interface, on circuit board
At least three test probes are additionally provided with, reasonable integral structure is simple, small volume, and it is easy to detect, it is connected with below circuit board
One relay, can be used for detecting secondary windings whether poor contact, the input signal ground terminal of tested primary is added
Entering relay, the on-off logic of this relay is controlled by test macro, according to transformer when signal input grounding end is opened a way,
Secondary will appear the feature of significantly induced voltage, and system control is first passed through before official testing disconnects relay, this
When system detection secondary whether occur significantly induced voltage judges whether normally contact is connected to electricity for stitch and tester probe
Road judges that the time is less than 100ms, will not impact to production efficiency, and effectively since whole process is controlled by system
Detection accuracy is improved, is provided with cover lid outside shell, it is practical convenient for protection internal circuit board and wiring.
2, four signaling interfaces are set as input interface, armature winding interface, secondary windings interface, feedback winding interface,
Convenient for signaling interface and common mode test host connects, artificial reading judgement is substituted by system, reduction defective products fail to judge erroneous judgement,
The problems such as non-defective unit is misjudged, effectively improves detection accuracy.
3, circuit board is connected to bottom in shell by least four first support copper posts, stably and firmly pacifies circuit board
In shell, prevents circuit board from causing testing result inaccurate because of unstable installation, further increase detection accuracy, improve
Detection efficiency.
4, test position fix plate is connected to circuit board by least four second support copper posts, stably and firmly will test
Positioning plate is mounted on circuit board, prevents test position fix plate from causing testing result inaccurate because of unstable installation, further
Detection accuracy is improved, detection efficiency is improved.
5, at least three are offered on test position fix plate for testing the probe aperture of probe face, are convenient for transformer to be measured
Stitch connect with probe, guarantee detection process operate normally, effectively avoid influence detection efficiency.
6, cover lid center is provided with one for testing the aperture that probe is connect with test position fix plate, convenient for that will test probe
It stretches out, is connect with transformer to be measured, simplify detecting step, while testing probe to be stably connected with test position fix plate.
7, a kind of common mode test method is surveyed by loading input voltage and working frequency to tested product simulation
The coupled interference noise of trial product primary and secondary is precisely shown in the form of numerical value and automatically according to setting differentiation qualification and not
It is qualified simultaneously to have auditory tone cues output, in order to which tester more intuitively judges and foolproof function, effectively reduce artificial
The erroneous judgement problem of reading improves detection efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model test fixture；
Fig. 2 is the structural schematic diagram that the utility model test fixture removes cover lid；
Fig. 3 is the wiring diagram of the common mode test method of the utility model；
Fig. 4 is the schematic diagram of the common mode test method of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.
As shown in Figs. 1-2, the common mode test fixture of stitch contact detection function, including shell 110, setting are in shell 110
Interior circuit board 120, the survey for being connected at least four signaling interfaces 130 of circuit board 120 and being mounted on 120 top of circuit board
Positioning plate 140 is tried, 110 side of shell is additionally provided with a system control interface 150, is additionally provided on the circuit board 120
At least three test probes 121, and a relay 160 is connected with below the circuit board 120, is provided with outside the shell 110
Cover lid 170.
Four signaling interfaces 130 are set as input interface 131, armature winding interface 132, secondary windings interface 133, feedback
Around group interface 134, convenient for signaling interface 130 to be connect with common mode test host, artificial reading judgement is substituted by system, is reduced
Defective products fail to judge erroneous judgement, non-defective unit misjudgement the problems such as, effectively improve detection accuracy.
Circuit board 120 is connected to bottom in shell 110 by least four first support copper posts 122, stably and firmly will
Circuit board 120 is mounted in shell 110, prevents circuit board 120 from causing testing result inaccurate because of unstable installation, further
Detection accuracy is improved, detection efficiency is improved.
Test position fix plate 140 is connected to 120 top of circuit board by least four second support copper posts 141, stable and firm
Test position fix plate 140 is mounted on 120 top of circuit board by ground, prevents test position fix plate 140 from causing to detect because of unstable installation
As a result inaccurate, detection accuracy is further increased, detection efficiency is improved.
At least three are offered on test position fix plate 140 for testing the probe apertures 142 of the work of probe 121, convenient for will be to
The stitch for surveying transformer is connect with test probe 121, guarantees that detection process operates normally, and effectively avoids influencing detection efficiency.
170 center of cover lid is provided with one for testing the aperture 171 that probe 121 is connect with test position fix plate 140, is convenient for
Test probe 121 is stretched out, is connect with transformer to be measured, simplifies detecting step, while testing probe 121 can also be fixed with test
Position plate 140 is stably connected with.
As shown in Figs. 1-2, the utility model includes shell 110, the circuit board being arranged in shell 110 120, is connected to electricity
At least four signaling interfaces 130 of road plate 120 and the test position fix plate 140 for being mounted on 120 top of circuit board, shell 110 1
Side is additionally provided with a system control interface 150, and at least three test probes 121 are additionally provided on circuit board 120, and overall structure is closed
Reason is simple, and small volume is easy to detect, and a relay 160 is connected with below circuit board 120, can be used for detecting secondary windings
Whether poor contact, relay 160, the on-off of this relay 160 is added in the input signal ground terminal of tested primary
Logic is controlled by test macro, and according to transformer when signal input grounding end is opened a way, secondary will appear significantly induced electricity
The feature of pressure, system control is first passed through before official testing disconnects relay 160, and at this moment whether system detection secondary goes out
Now significantly induced voltage judges whether stitch and tester probe normally contact connection circuit, since whole process is to pass through
System control judges that the time is less than 100ms, will not impact to production efficiency, and effectively increase detection accuracy, shell
It is provided with cover lid 170 outside 110, it is practical convenient for protection internal circuit board 120 and wiring.
As shown in Figure 3-4, a kind of common mode test method, includes the following steps
(1) setup test device and system: the system including transformer to be measured, signal generator, common mode test host connects
Connect end, first passage, second channel and third channel, common mode test fixture, wherein common mode test fixture be equipped with input interface,
Armature winding interface, secondary windings interface, feedback winding interface, system control interface.
(2) wiring:
A) input interface of common mode test fixture connects with the output end of signal generator；
B) the armature winding interface of common mode test fixture connects with the first passage of common mode test host, for monitoring test
When signal generator output it is whether abnormal；
C) the secondary windings interface of common mode test fixture connects with the second channel of common mode test host, by test result number
It is shown according to quantization, common mode tests host by the maximum value and minimum value in reading waveform each period, then calculates average value, obtains
To stable numerical value；
D) the feedback winding interface of common mode test fixture connects with the third channel of common mode test host, before official testing
System first detects feedback winding coupled voltages whether in the range of setting；
E) the system connecting pin of common mode test host is connected with the system control interface of common mode test fixture.
(3) when test starts:
A) the test probe being connected to the stitch of transformer to be measured in common mode test fixture；
B) common mode test host receives from third channel and detects feedback winding coupled voltages whether in the range of setting,
Illustrate that primary or feedback winding stitch has poor contact when coupled voltages are not in setting range；
C) common mode test host is monitored the signal of the output of signal generator, whether judges signal generator output
It is abnormal；
D) common mode tests host and issues the second channel of signal for the waveform of test result from secondary windings interface is received
It is converted into digital display, personnel convenient to use explicitly define desired parameter area；
(4) data are analyzed: by loading input voltage and working frequency to tested product simulation, at the beginning of test product
Grade and secondary coupled interference noise, in the form of numerical value precisely display and automatically according to setting differentiate qualification with it is unqualified and have
Auditory tone cues output.
The principles of the present invention are as follows:
By loading input voltage and working frequency, test product primary and secondary coupling to tested product simulation
Close interference noise, in the form of numerical value precisely display and automatically according to setting differentiate it is qualified with it is unqualified and have auditory tone cues defeated
Out, in order to which tester more intuitively judges and foolproof function, the erroneous judgement problem manually read is effectively reduced, is improved
Detection efficiency.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (6)
1. the common mode test fixture with stitch contact detection function, it is characterised in that: including shell, be arranged in the intracorporal circuit of shell
Plate, at least four signaling interfaces for being connected to circuit board and the test position fix plate for being mounted on circuit board, the shell one
Side is additionally provided with a system control interface, and at least three test probes, the circuit board lower section are additionally provided on the circuit board
It is connected with a relay.
2. the common mode test fixture according to claim 1 with stitch contact detection function, it is characterised in that: described in four
Signaling interface is set as input interface, armature winding interface, secondary windings interface, feedback winding interface.
3. the common mode test fixture according to claim 1 with stitch contact detection function, it is characterised in that: the circuit
Plate is connected to bottom in the shell by least four first support copper posts.
4. the common mode test fixture according to claim 1 with stitch contact detection function, it is characterised in that: the test
Positioning plate is connected to the circuit board by least four second support copper posts.
5. the common mode test fixture according to claim 1 with stitch contact detection function, it is characterised in that: the test
At least three probe apertures for the test probe face is offered on positioning plate.
6. the common mode test fixture according to claim 1 with stitch contact detection function, it is characterised in that: the shell
It is provided with cover lid outside, cover lid center is provided with one for testing the aperture that probe is connect with test position fix plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821892121.1U CN209372981U (en) | 2018-11-16 | 2018-11-16 | Common mode test fixture with stitch contact detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821892121.1U CN209372981U (en) | 2018-11-16 | 2018-11-16 | Common mode test fixture with stitch contact detection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209372981U true CN209372981U (en) | 2019-09-10 |
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ID=67836931
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821892121.1U Active CN209372981U (en) | 2018-11-16 | 2018-11-16 | Common mode test fixture with stitch contact detection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342840A (en) * | 2018-11-16 | 2019-02-15 | 东莞市博展机械科技有限公司 | Common mode test fixture and common mode test method with stitch contact detection function |
-
2018
- 2018-11-16 CN CN201821892121.1U patent/CN209372981U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342840A (en) * | 2018-11-16 | 2019-02-15 | 东莞市博展机械科技有限公司 | Common mode test fixture and common mode test method with stitch contact detection function |
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