CN203772995U - Interface short-circuit detector - Google Patents
Interface short-circuit detector Download PDFInfo
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- CN203772995U CN203772995U CN201420024907.7U CN201420024907U CN203772995U CN 203772995 U CN203772995 U CN 203772995U CN 201420024907 U CN201420024907 U CN 201420024907U CN 203772995 U CN203772995 U CN 203772995U
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Abstract
The embodiment of the utility model discloses an interface short-circuit detector, which comprises a first-stage switching circuit, a second-stage switching circuit and a detection circuit, wherein an output end of the first-stage switching circuit is connected with an input end of the second-stage switching circuit, an output end of the second-stage switching circuit is connected with an output end of the detection circuit, an input end of the first-stage switching circuit and an input end of the detection circuit are respectively used for connecting a DC power supply, the first-stage switching circuit is used for connecting an interface and is further used for inputting a voltage to the second-stage switching circuit so as to control the on/off of the second-stage switching circuit, the on/off of the second-stage switching circuit is used for controlling whether the detection circuit operate or not, the operating detection circuit indicates that the interface is short-circuited, the non-operating detection circuit indicates that the interface is not short-circuited, the interface comprises N pins, and the N is a positive integer less than or equal to 5. By implementing the embodiment of the utility model, whether the interface is short-circuited or not can be detected, and the interface short-circuit detector has the advantages of simple structure, convenient operation and low cost.
Description
Technical field
The utility model relates to electronic circuit technology field, is specifically related to a kind of interface short circuit detector.
Background technology
Earphone interface is generally used for audio amplifier, mobile phone, PC(Personal Computer as the output interface of audio analog signals) etc. on electronic product, and earphone interface is according to pin(stitch) quantity has the specification of 3pin, 4pin and 5pin.As the conventional device of audio-visual equipment, the range of application of earphone interface is very extensive, but because manufacturer does not safeguard the production equipment of earphone interface in time, cause earphone interface off quality to come into the market, the common defective phenomenon of earphone interface is short circuit between pin point, in prior art, mainly that producer utilizes multimeter short circuit shelves to detect short circuit phenomenon between the pin point of earphone interface to the detection of earphone interface, but this detection method need to detect between every two pin points, complicated operation, and cost is higher.
Utility model content
The utility model embodiment discloses a kind of interface short circuit detector, for solving the short circuit phenomenon that every two pin that prior art utilizes multimeter short circuit shelves to detect interface order and the higher problem of complicated operation, cost causing.
The utility model embodiment provides a kind of interface short circuit detector, comprises level switching circuit, secondary switch circuit and testing circuit, wherein:
The output terminal of described level switching circuit connects the input end of described secondary switch circuit, the output terminal of described secondary switch circuit connects the output terminal of described testing circuit, the input end of described level switching circuit and the input end of described testing circuit are respectively used to connect direct supply, described level switching circuit is used for connecting described interface, described level switching circuit also for to described secondary switch circuit input voltage to control conducting or the cut-off of described secondary switch circuit, whether the conducting of described secondary switch circuit or cut-off are used for controlling described testing circuit and work, wherein, described testing circuit work is used for representing described interface short circuit, described testing circuit is not worked for representing that described interface does not have short circuit, described interface comprises N stitch, described N is less than or equal to 5 positive integer.
In the utility model embodiment, in the time there is not between pin point short circuit phenomenon in interface, level switching circuit conducting, and level switching circuit makes the cut-off of secondary switch circuit to the voltage of secondary switch circuit input, and testing circuit is not worked; In the time there is pin point short circuit phenomenon in interface, level switching circuit cut-off, and level switching circuit makes secondary switch circuit turn-on, testing circuit work to the voltage of secondary switch circuit input.Implement the utility model embodiment and can whether work to detect whether short circuit of interface according to testing circuit, and simple in structure, easy to operate, with low cost.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the disclosed a kind of interface short circuit detector of the utility model embodiment;
Fig. 2 is the disclosed another kind of interface short circuit detector of the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
In the utility model embodiment, disclose a kind of interface short circuit detector, implemented the utility model embodiment and can detect whether short circuit of interface, and simple in structure, easy to operate, with low cost.Below be elaborated respectively.
Refer to Fig. 1, Fig. 1 is the disclosed a kind of interface short circuit detector of the utility model embodiment.Wherein, the interface short circuit detector shown in Fig. 1 can be for detection of AV(Audio Video, audio frequency and video) interface, USB(Universal Serial Bus, USB (universal serial bus)) interface and other interface with pin etc.As shown in Figure 1, this interface short circuit detector can comprise level switching circuit, secondary switch circuit and testing circuit, wherein:
The output terminal of level switching circuit connects the input end of secondary switch circuit, the output terminal of the output terminal connection detection circuit of secondary switch circuit, the input end of level switching circuit and the input end of testing circuit are respectively used to connect direct supply, level switching circuit is for connecting interface, level switching circuit is also for conducting or the cut-off with control secondary switch circuit to secondary switch circuit input voltage, whether the conducting of secondary switch circuit or cut-off are used for controlling testing circuit and work, wherein, testing circuit work is used for representing interface short circuit, testing circuit is not worked for representing that interface does not have short circuit, interface comprises N stitch, N is less than or equal to 5 positive integer.
In the utility model embodiment, in the time there is not between pin point short circuit phenomenon in interface, level switching circuit conducting, and level switching circuit makes the cut-off of secondary switch circuit to the voltage of secondary switch circuit input, and testing circuit is not worked; In the time there is pin point short circuit phenomenon in interface, level switching circuit cut-off, and level switching circuit makes secondary switch circuit turn-on, testing circuit work to the voltage of secondary switch circuit input.Implement the utility model embodiment and can whether work to detect whether short circuit of interface according to testing circuit, and simple in structure, easy to operate, with low cost.
Refer to Fig. 2, Fig. 2 is the disclosed another kind of interface short circuit detector of the utility model embodiment.Wherein, the interface short circuit detector shown in Fig. 2 can be for detection of AV(Audio Video, audio frequency and video) interface, USB(Universal Serial Bus, USB (universal serial bus)) interface and other interface with pin etc.As shown in Figure 2, this interface short circuit detector 200 can comprise level switching circuit 201, secondary switch circuit 202 and testing circuit 203, wherein:
The output terminal of level switching circuit 201 connects the input end of secondary switch circuit 202, the output terminal of the output terminal connection detection circuit 203 of secondary switch circuit 202, the input end of the input end of level switching circuit 201 and testing circuit 203 is respectively used to connect direct supply VCC, level switching circuit 201 is for connecting interface, level switching circuit 201 is also for conducting or the cut-off with control secondary switch circuit 202 to secondary switch circuit 202 input voltages, whether the conducting of secondary switch circuit 202 or cut-off are used for controlling testing circuit 203 and work, wherein, testing circuit 203 work are used for representing interface short circuit, testing circuit 203 is not worked for representing that interface does not have short circuit, interface comprises N stitch, N is less than or equal to 5 positive integer.
As the optional embodiment of one, as shown in Figure 2, level switching circuit 201 can comprise:
The first triode Q1, the first resistance R 1, the second resistance R 2, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5 and the 6th diode D6, wherein,
One end of the first resistance R 1 connects respectively the base stage of the first triode Q1 and the anode of the first diode D1, the negative electrode of the first diode D1 connects the anode of the second diode D2, the negative electrode of the second diode D2 connects the anode of the 3rd diode D3, the negative electrode of the 3rd diode D3 connects the anode of the 4th diode D4, the negative electrode of the 4th diode D4 connects the negative electrode of the 6th diode D6, the negative electrode of the anodic bonding of the 6th diode D6 the 5th diode D5, the emitter of anodic bonding the first triode Q1 of the 5th diode D5, the collector of the first triode Q1 connects respectively one end of the second resistance R 2 and the input end of secondary switch circuit 202, the other end of the second resistance R 2 connects the other end of the first resistance R 1 and is respectively used to connect direct supply VCC, the negative electrode of the 4th diode D4 is for ground connection, the anode of the first diode D1, the anode of the second diode D2, the anode of the 3rd diode D3, the negative electrode of the anode of the 4th diode D4 and the 4th diode D4 is respectively used to the stitch of connecting interface.
As shown in Figure 2, F1～F5 in Fig. 2 is respectively the lead-in wire extracting from the anode of the anode of the anode of the anode of the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 and the negative electrode of the 4th diode D4, and for connecting the stitch of interface to be detected, if the number of the stitch of interface is less than 5, select any lead-in wire equal with the stitch number of interface in F1～F5 to be connected with the stitch of interface.
As the optional embodiment of one, as shown in Figure 2, secondary switch circuit 202 can comprise the second triode Q2 and the 7th diode D7, wherein:
The collector of anodic bonding the first triode Q1 of the 7th diode D7, the negative electrode of the 7th diode D7 connects the base stage of the second triode Q2, the emitter of the second triode Q2 connects the emitter of the first triode Q1, the output terminal of the collector connection detection circuit 203 of the second triode Q2.
As the optional embodiment of one, as shown in Figure 2, testing circuit 203 can comprise the 3rd resistance R 3 and hummer LS1, wherein:
One end of the 3rd resistance R 3 connects one end of hummer LS1, and the other end of hummer LS1 connects the collector of the second triode Q2, and the other end of the 3rd resistance R 3 is used for connecting direct supply VCC.
In the utility model embodiment, hummer LS1 in testing circuit 203 is for pointing out the testing result of this interface short circuit detector 200, even hummer LS1 sends sound, represent that detected interface exists short circuit phenomenon between pin point, if hummer LS1 does not send sound, represent that detected interface does not exist short circuit phenomenon between pin point.
As the optional embodiment of one, as shown in Figure 2, testing circuit 203 can also comprise LED lamp LED1, wherein:
One end of anodic bonding the 3rd resistance R 3 of LED lamp LED1, the negative electrode of LED lamp LED1 connects one end of hummer LS1.
In the utility model embodiment, LED lamp LED1 in testing circuit 203 also can be for pointing out the testing result of this interface short circuit detector 200, in the time that LED lamp LED1 is bright, represent that detected interface exists short circuit phenomenon between pin point, in the time that LED lamp LED1 does not work, represent that detected interface does not exist short circuit phenomenon between pin point.In the utility model embodiment, point out testing result with hummer LS1 and LED lamp LED1 simultaneously, improved the accuracy of testing result.
Optionally, the span of direct supply VCC can be 5V-12V.
Optionally, the first triode Q1 and the second triode Q2 can be NPN type triode.
Optionally, the model of the first diode D1 to the seven diode D7 can be IN4007.
Optionally, hummer LS1 can be active buzzer.
Below in conjunction with Fig. 2, the principle of the utility model embodiment is described in detail.
In the time there is not between pin point short circuit phenomenon in interface to be detected, the base voltage V of the first triode Q1
b1obtained the emitter voltage V of the first triode Q1 by the first diode D1 to the four diode D4 and the first resistance R 1 dividing potential drop
e1equal the voltage of the anode of the 5th diode D5, the first resistance R 1 of choosing appropriate value makes the base voltage V of the first triode Q1 in the time that interface to be detected does not exist short circuit phenomenon between pin point
b1emitter voltage V with the first triode Q1
e1difference be greater than 0.7V so that the first triode Q1 conducting, after the first triode Q1 conducting, the collector voltage V of the first triode Q1
c1after the pressure drop of the 7th diode D7, obtain the base voltage V of the second triode Q2
b2, the base voltage V of the second triode Q2
b2emitter voltage V with the second triode Q2
e2(V
e2equal V
e1) difference be less than 0.7V, the second triode Q2 is in cut-off state, hummer LS1 does not send sound and LED lamp LED1 does not work; In the time there is between pin point short circuit phenomenon in interface to be detected, the base voltage V of the first triode Q1
b1obtained the base voltage V of the first triode Q1 by the diode not being short-circuited in the first diode D1 to the four diode D4 and the first resistance R 1 dividing potential drop
b1emitter voltage V with the first triode Q1
e1difference be less than 0.7V, the first triode Q1 cut-off, in the time of the first triode Q1 cut-off, the collector voltage V of the first triode Q1
c1equal the both end voltage V of VCC and the second resistance R 2
r2difference, the collector voltage V of the first triode Q1
c1after the pressure drop of the 7th diode D7, obtain the base voltage V of the second triode Q2
b2, the base voltage V of the second triode Q2
b2emitter voltage V with the second triode Q2
e2(V
e2equal V
e1) difference be greater than 0.7V, the second triode Q2 is in conducting state, hummer LS1 sends sound and LED lamp LED1 is shinny.In the utility model embodiment, the value of the first resistance R 1 is very important, should ensure in the time that interface to be detected does not exist between pin point short circuit phenomenon the base voltage V of the first triode Q1
b1emitter voltage V with the first triode Q1
e1difference be greater than 0.7V so that the first triode Q1 conducting, ensure again in the time that interface to be detected exists between pin point short circuit phenomenon the base voltage V of the first triode Q1
b1emitter voltage V with the first triode Q1
e1difference be less than 0.7V so that the first triode Q1 cut-off.
Visible, interface short circuit detector in the utility model embodiment can be by simple the electric circuit constitute, circuit can be made up of simple components and parts, simplicity of design, with low cost, and can compatible pin quantity be up to the detection of 5 interface, in the time there is between pin point short circuit phenomenon in interface to be detected, hummer can send sound and LED lamp is luminous to point out interface to be detected to have short circuit phenomenon between pin point, interface short circuit detector in the utility model embodiment need to not detect between every two pin points, simple to operate, and can show fast testing result.
A kind of interface short circuit detector above the utility model embodiment being provided is described in detail, applied instantiation herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof; , for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model meanwhile.
Claims (9)
1. an interface short circuit detector, is characterized in that, comprises level switching circuit, secondary switch circuit and testing circuit, wherein:
The output terminal of described level switching circuit connects the input end of described secondary switch circuit, the output terminal of described secondary switch circuit connects the output terminal of described testing circuit, the input end of described level switching circuit and the input end of described testing circuit are respectively used to connect direct supply, described level switching circuit is used for connecting described interface, described level switching circuit also for to described secondary switch circuit input voltage to control conducting or the cut-off of described secondary switch circuit, whether the conducting of described secondary switch circuit or cut-off are used for controlling described testing circuit and work, wherein, described testing circuit work is used for representing described interface short circuit, described testing circuit is not worked for representing that described interface does not have short circuit, described interface comprises N stitch, described N is less than or equal to 5 positive integer.
2. interface short circuit detector as claimed in claim 1, is characterized in that, described level switching circuit comprises:
The first triode, the first resistance, the second resistance, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode and the 6th diode, wherein,
One end of described the first resistance connects respectively the base stage of described the first triode and the anode of described the first diode, the negative electrode of described the first diode connects the anode of described the second diode, the negative electrode of described the second diode connects the anode of described the 3rd diode, the negative electrode of described the 3rd diode connects the anode of described the 4th diode, the negative electrode of described the 4th diode connects the negative electrode of described the 6th diode, the negative electrode of the 5th diode described in the anodic bonding of described the 6th diode, the emitter of the first triode described in the anodic bonding of described the 5th diode, the collector of described the first triode connects respectively one end of described the second resistance and the input end of described secondary switch circuit, the other end of described the second resistance connects the other end of described the first resistance and is respectively used to connect described direct supply, the negative electrode of described the 4th diode is for ground connection, the anode of described the first diode, the anode of described the second diode, the anode of described the 3rd diode, the negative electrode of the anode of described the 4th diode and described the 4th diode is respectively used to connect the stitch of described interface.
3. interface short circuit detector as claimed in claim 2, is characterized in that, described secondary switch circuit comprises the second triode and the 7th diode, wherein:
The collector of the first triode described in the anodic bonding of described the 7th diode, the negative electrode of described the 7th diode connects the base stage of described the second triode, the emitter of described the second triode connects the emitter of described the first triode, and the collector of described the second triode connects the output terminal of described testing circuit.
4. interface short circuit detector as claimed in claim 3, is characterized in that, described testing circuit comprises the 3rd resistance and hummer, wherein:
One end of described the 3rd resistance connects one end of described hummer, and the other end of described hummer connects the collector of described the second triode, and the other end of described the 3rd resistance is used for connecting described direct supply.
5. interface short circuit detector as claimed in claim 4, is characterized in that, described testing circuit also comprises LED lamp, wherein:
One end of the 3rd resistance described in the anodic bonding of described LED lamp, the negative electrode of described LED lamp connects one end of described hummer.
6. the interface short circuit detector as described in claim 1～5 any one, is characterized in that, the span of described direct supply is 5V-12V.
7. interface short circuit detector as claimed in claim 3, is characterized in that, described the first triode and described the second triode are NPN type triode.
8. interface short circuit detector as claimed in claim 3, is characterized in that, described the first diode to the model of described the 7th diode is IN4007.
9. interface short circuit detector as claimed in claim 4, is characterized in that, described hummer is active buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420024907.7U CN203772995U (en) | 2014-01-15 | 2014-01-15 | Interface short-circuit detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420024907.7U CN203772995U (en) | 2014-01-15 | 2014-01-15 | Interface short-circuit detector |
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| CN203772995U true CN203772995U (en) | 2014-08-13 |
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|---|---|---|---|
| CN201420024907.7U Expired - Fee Related CN203772995U (en) | 2014-01-15 | 2014-01-15 | Interface short-circuit detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849246A (en) * | 2017-03-01 | 2017-06-13 | 顺丰科技有限公司 | Charging inlet short-circuit detecting device, mobile terminal and method for detecting short circuit |
| WO2017185311A1 (en) * | 2016-04-28 | 2017-11-02 | 华为技术有限公司 | Short-circuit prevention detection device and user terminal |
| CN116774098A (en) * | 2023-05-25 | 2023-09-19 | 青岛豪江电子科技有限公司 | Single-path detection circuit, main detection circuit and detection device for motor driver |
-
2014
- 2014-01-15 CN CN201420024907.7U patent/CN203772995U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017185311A1 (en) * | 2016-04-28 | 2017-11-02 | 华为技术有限公司 | Short-circuit prevention detection device and user terminal |
| CN108027400A (en) * | 2016-04-28 | 2018-05-11 | 华为技术有限公司 | Anti- short-circuit detecting device and user terminal |
| CN108027400B (en) * | 2016-04-28 | 2019-11-29 | 华为技术有限公司 | Anti- short-circuit detecting device and user terminal |
| US10910818B2 (en) | 2016-04-28 | 2021-02-02 | Huawei Technologies Co., Ltd. | Anti-short-circuit detection apparatus and user terminal |
| CN106849246A (en) * | 2017-03-01 | 2017-06-13 | 顺丰科技有限公司 | Charging inlet short-circuit detecting device, mobile terminal and method for detecting short circuit |
| CN116774098A (en) * | 2023-05-25 | 2023-09-19 | 青岛豪江电子科技有限公司 | Single-path detection circuit, main detection circuit and detection device for motor driver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN SKYWORTH DIGITAL TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SKY-WORTH DIGITAL TECHNOLOGY CO., LTD.;SHENZHEN CITY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong city of Shenzhen province Nanshan District Gao Xin Road Building A14, SKYWORTH Patentee after: Shenzhen Skyworth Digital Technology Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Nanshan District Gao Xin Road Building A14, SKYWORTH Patentee before: Shenzhen Skyworth Digital Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20180115 |