CN206074691U - The test device of becket DC impedance in fingerprint recognition module - Google Patents
The test device of becket DC impedance in fingerprint recognition module Download PDFInfo
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- CN206074691U CN206074691U CN201620995852.3U CN201620995852U CN206074691U CN 206074691 U CN206074691 U CN 206074691U CN 201620995852 U CN201620995852 U CN 201620995852U CN 206074691 U CN206074691 U CN 206074691U
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Abstract
This utility model is related to a kind of test device of becket DC impedance in fingerprint recognition module, including base plate, cover plate and test circuit, the base plate is provided with the test trough placed for product to be measured, at least provided with a thimble on the cover plate, metallic rings contact when cover plate is covered on base plate in the thimble and product to be measured, the thimble is connected with test circuit, the test circuit converts different working conditions according to the becket resistance value in product to be measured, when in product to be measured, becket resistance value is in critical field, green light in test circuit, otherwise, when red.In this utility model fingerprint recognition module, the test device of becket DC impedance is simple to operation, test result accurately, substantially increase the efficiency of assembling product.
Description
Technical field
This utility model is related to the test device of DC impedance, and in particular to becket direct current in a kind of fingerprint recognition module
The test device of impedance.
Background technology
With the development of science and technology, electronics detection technology is employed more and more.Fingerprint recognition (fingerprinting)
Technology is most ripe at present and low-cost biometrics identification technology.For at present, the technology application of fingerprint recognition is the widest
General, we not only can see the figure of fingerprint identification technology in gate inhibition, attendance checking system, have more fingerprint recognitions on market
Application：As notebook computer, mobile phone, automobile, bank paying all can employing fingerprint identification technology.
In the use fingerprint recognition module of the electronic products such as mobile phone, panel computer, becket is often used, due to which
Acting as being grounded prevents people's electrostatic of human body when fingerprint chip is touched from damaging to chip, so the DC impedance of itself
It is the smaller the better, but, in current automatic test all using avometer testing its DC impedance, using very inconvenient.
Utility model content
In order to overcome drawbacks described above, this utility model to provide a kind of test of becket DC impedance in fingerprint recognition module
Device, the test device can solve the problems, such as to make troubles using avometer test.
This utility model in order to solve the technical scheme adopted by its technical problem is：Metal in a kind of fingerprint recognition module
The test device of ring DC impedance, including base plate, cover plate and test circuit, the base plate are provided with the survey placed for product to be measured
Experimental tank, the metal at least provided with a thimble on the cover plate, when cover plate is covered on base plate in the thimble and product to be measured
Ring is contacted, and the thimble is connected with test circuit, and the test circuit is converted not according to the becket resistance value in product to be measured
Same working condition.
Further, three high-power resistances (R1, R2 and R3) and becket (R8) composition are provided with the test circuit
Voltage sampling circuit, R1 and R2 series connection are input into for reference voltage, R8 and R3 sampled voltage inputs in series, and two inputs are believed
Number it is respectively connected to compare in amplifying circuit LM339, when the impedance of R8 is in the critical field of setting, turn-on transistor Q1 drives
Green light, otherwise, turn-on transistor Q2 drives when red.
Further, the audion Q2 is also associated with alarm device.
Further, the thimble is four.
The beneficial effects of the utility model are：Fingerprint module to be measured (including FPCB and chip) is positioned over into the test of base plate
In groove, and cover plate is covered, now the thimble in cover plate can contact the becket in product to be measured, therefore becket is accessed survey
In examination circuit, when the resistance value of the becket is in the acceptability limit of setting, test circuit shows green light；When the gold
When the resistance value of category ring goes beyond the scope, test circuit shows that when red starts alarm device simultaneously, with the general-purpose electricity for adopting before
Table compares come the method for testing becket impedance, and the result of the test device test is very directly perceived, it is only necessary to which observation is green light
Bright or when red, it is not necessary to see that specific numerical value is judged, while when product is defective work, alarm device is sent out
Go out alarm signal, cause the attention of operator.Test device of the present utility model has simple to operation, test result accurate
Really, substantially increase the advantage of assembling product efficiency.
Description of the drawings
Fig. 1 is the decomposition texture schematic diagram of base plate and cover plate in this utility model；
Fig. 2 is the integrated structure schematic diagram of base plate and cover plate in this utility model
Fig. 3 is the schematic diagram of test circuit in this utility model.
In figure：1- base plates, 2- test troughs, 3- cover plates, 4- products to be measured, 5- thimbles.
Specific embodiment
Below in conjunction with this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than the embodiment of whole.
Based on the embodiment in this utility model, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of this utility model protection.
As depicted in figs. 1 and 2, in a kind of fingerprint recognition module becket DC impedance test device, including base plate 1,
Cover plate 3 and test circuit, the base plate 1 are provided with the test trough 2 placed for product to be measured, at least provided with one on the cover plate 3
Individual thimble 5, the metallic rings contact when cover plate 3 is covered on base plate 1 in the thimble 5 and product to be measured 4, the thimble 5 with survey
Examination circuit connection, the test circuit convert different working conditions according to the becket resistance value in product to be measured.Will be to be measured
Fingerprint module (including FPCB and chip) is positioned in the test trough of base plate, and covers cover plate, and now the thimble in cover plate can connect
The becket in product to be measured is contacted, therefore becket is accessed in test circuit, when the resistance value of the becket is in setting
Acceptability limit in when, test circuit shows a kind of working condition；When the resistance value of the becket goes beyond the scope, test electricity
Road shows another kind of working condition, and tester can judge product to be measured to close according to the different working condition of test circuit
Lattice product or defective products, test device of the present utility model is simple to operation, test result accurate, substantially increases product group
The efficiency of dress.
As further improvement of the utility model, be provided with the test circuit three high-power resistances (R1, R2 and
R3) and becket (R8) composition voltage sampling circuit, R1 and R2 series connection is reference voltage input, and R8 and R3 sampling in series is electric
Pressure input, two input signals are respectively connected to compare in amplifying circuit LM339, when the impedance of R8 is in the critical field of setting
When, turn-on transistor Q1 drives green light, and otherwise, turn-on transistor Q2 drives when red.As shown in figure 3, R1 and R2 series connection is made
It is connected to for reference voltage on the input 7 for comparing amplifying circuit LM339, R3 and R8 sampled voltages in series are connected to and compare
On the input 6 of amplifying circuit LM339, if becket be R8 impedance setting critical field in when, compare amplification electricity
Road LM339 is high level by the voltage that OUT2 is exported, then turn on NPN triode Q1 and drive green light；If becket is R8
Impedance beyond setting critical field, it is low level to compare the voltage that amplifying circuit LM339 exported by OUT2, then turn on
PNP triode Q2 drives green light.Therefore, when operator observe green light, illustrate the impedance of becket in product to be measured
It is satisfactory, i.e., the product is certified products；Otherwise during when red, illustrate that product to be measured is defective products, done over again or reported
It is useless to process.
Used as further improvement of the utility model, the audion Q2 is also associated with alarm device.Because alarm device
It is connected on audion Q2, so when the impedance of becket is above standard scope, not only red light is lighted, while alarm device
It is activated, alarm device can be the alarm or high brightness flicker lamp for sending sound, remind operator with this.
Used as further improvement of the utility model, the thimble is four.Four thimbles being provided with can be used to and gold
The different face of category ring is contacted, and improves the accuracy of test.
Operating process of the present utility model is：Fingerprint module to be measured (including FPCB and chip) is positioned over into base plate first
In test trough, then cover plate will be covered, now the thimble in cover plate can contact the becket in product to be measured, four for being provided with top
Pin can be with the not coplanar of contacting metal ring, and input pole of the outconnector to circuit on thimble is high-power high-precision with three
Degree resistance (2 watts) and becket constitute voltage sampling circuit together, and from wherein picking out signal sampling point (as shown in Figure 3), with
R1 and R2 series connection is reference input, becket and R3 sampled voltage inputs in series；The input signal difference that two are obtained
Two input pins of amplifying circuit LM339 are compared in access, compare amplifying circuit when the impedance of becket is within critical field
High level is output as, turn-on transistor Q1 drives green light to light, i.e., this test product is certified products, when impedance exceeds on becket
During critical field, the pressure drop on becket can become big, cause the output for comparing amplifying circuit that upset occurs, and turn-on transistor Q2 drives
Dynamic alarm device and red bright, to point out tester this product as defective work.
It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility,
Some deformations and improvement can also be made, these belong to protection domain of the present utility model.Therefore, this utility model patent
Protection domain should be defined by claims.
Claims (4)
1. in a kind of fingerprint recognition module becket DC impedance test device, it is characterised in that：Including base plate, cover plate and survey
Examination circuit, the base plate are provided with the test trough placed for product to be measured, at least provided with a thimble on the cover plate, work as cover plate
Metallic rings contact when covering on base plate in the thimble and product to be measured, the thimble are connected with test circuit, the test
Circuit converts different working conditions according to the becket resistance value in product to be measured.
2. in fingerprint recognition module according to claim 1 becket DC impedance test device, it is characterised in that：Institute
Three high-power resistances R1, R2 and R3 and becket R8 composition voltage sampling circuits, R1 and R2 series connection are provided with stating test circuit
It is input into for reference voltage, two input signals are respectively connected to compare amplifying circuit by R8 and R3 sampled voltage inputs in series
In LM339, when the impedance of R8 is in the critical field of setting, turn-on transistor Q1 drives green light, otherwise, turn-on transistor
Q2 drives when red.
3. in fingerprint recognition module according to claim 2 becket DC impedance test device, it is characterised in that：Institute
State audion Q2 and be also associated with alarm device.
4. in fingerprint recognition module according to claim 1 becket DC impedance test device, it is characterised in that：Institute
Thimble is stated for four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620995852.3U CN206074691U (en) | 2016-08-30 | 2016-08-30 | The test device of becket DC impedance in fingerprint recognition module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620995852.3U CN206074691U (en) | 2016-08-30 | 2016-08-30 | The test device of becket DC impedance in fingerprint recognition module |
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| Publication Number | Publication Date |
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| CN206074691U true CN206074691U (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620995852.3U Active CN206074691U (en) | 2016-08-30 | 2016-08-30 | The test device of becket DC impedance in fingerprint recognition module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154042A (en) * | 2016-08-30 | 2016-11-23 | 昆山丘钛微电子科技有限公司 | The test device of becket DC impedance in fingerprint recognition module |
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2016
- 2016-08-30 CN CN201620995852.3U patent/CN206074691U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154042A (en) * | 2016-08-30 | 2016-11-23 | 昆山丘钛微电子科技有限公司 | The test device of becket DC impedance in fingerprint recognition module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201210 Address after: 3 / F, factory building No.1, No.3, Taihong Road, high tech Zone, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Kunshanqiu titanium biometric technology Co., Ltd Address before: No.3, Taihong Road, Kunshan hi tech Industrial Development Zone, Suzhou City, Jiangsu Province Patentee before: KUNSHAN Q TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |