CN201765291U - Tester using electromagnetic induction principle to look for short circuit point position - Google Patents
Tester using electromagnetic induction principle to look for short circuit point position Download PDFInfo
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- CN201765291U CN201765291U CN2010205249840U CN201020524984U CN201765291U CN 201765291 U CN201765291 U CN 201765291U CN 2010205249840 U CN2010205249840 U CN 2010205249840U CN 201020524984 U CN201020524984 U CN 201020524984U CN 201765291 U CN201765291 U CN 201765291U
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- electromagnetic induction
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- short circuit
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Abstract
The utility model discloses a tester using electromagnetic induction principle to look for a short circuit point position, comprising a signal generator used for outputting a change signal, a signal probe used for detecting the signal of a change magnetic field, a detecting signal treatment part and a display device. The utility model is characterized in that the output end of the signal generator is provided with a first lead end and a second lead end, which are respectively connected to the circuit board line; the signal probe is connected to the display device through the detecting signal treatment part. The utility model is advantageous in that the position of the short circuit point can be determined through the distribution of magnetic field signal; the dismounting of circuit members are not required; the cost is saved; the operation is convenient and fast; the searching is accurate.
Description
Technical field
The utility model relates to a kind of electric circuit inspection equipment, particularly a kind of tester that utilizes electromagnetic induction principle to seek the short dot particular location.
Background technology
The circuit board short circuit is a kind of common faults type in the electronic product, and existing service technique can only judge whether there is short circuit between the different circuits, and can't locate for the particular location point of short circuit.In order to find out short dot, people are generally by removing device, measure the impedance magnitude at diverse location place, method such as cut apart piecemeal the faulty circuit plate is handled and analyzed, thereby judge the short dot present position.During practical application, said method is realized difficulty, accuracy is doubtful as a result, particularly in than the complex failure circuit, accurately find short dot, require a great deal of time cost and fund cost, this cost expenditure in some cases even also can be greater than the cost expenditures that more renews plate and brought.It is current that we need a kind of short circuit tester that can detect the short circuit present position quickly and easily badly.
Summary of the invention
For addressing the above problem, the utility model provide a kind of principle ingenious, save cost, easy to use, the tester that can detect location of short circuit accurately and quickly.
The utility model is that the technical scheme that its problem of solution is adopted is:
A kind of tester that utilizes electromagnetic induction principle to seek the short dot particular location, comprise the signal generator that is used to export variable-current, the signal probe that is used for the change detected field signal, detection signal processing section and display device, the output terminal of described signal generator is connected to first lead end and second lead end that is used for being connected with circuit board line respectively, and described signal probe is connected with display device by the detection signal processing section.
As preferred embodiment, described detection signal processing section comprises the one-level amplifying circuit, be used for the change detected field signal and induce electromagnetic induction pick-up unit, second amplifying circuit and the A/D change-over circuit of electric field signal, the input end of described one-level amplifying circuit is connected with signal probe, the output terminal of one-level amplifying circuit is connected with the electromagnetic induction pick-up unit, and the output terminal of electromagnetic induction pick-up unit links to each other with display device by second amplifying circuit and A/D change-over circuit successively.
First lead end that signal generator of the present utility model connected and second lead end are received the diverse location place of circuit board line, when signal generator has output, show between first lead end and second lead end and have path, by can judge this path to the analysis of circuit is regular path or the improper path that produces because of short circuit, therefore, utilize the function of this part can find out short circuit line, further, after finding out short circuit line, first lead end of signal generator and second lead end keep and being connected of short circuit line, what signal generator was exported is variable-current, the size of this electric current or direction or size and Orientation can continue to change in time, magnetic effect of electric current principle according to oersted, this electric current induces the field signal of variation near circuit in the out-of-date meeting in short circuit line upper reaches, signal probe detects the field signal of this variation in the mobile mode of cruising, utilize display device to show after the signal process signal processing part divisional processing that detection obtains, people just can recognize the field signal situation of signal probe present position by the displaying contents of display device, and then judge signal probe near the electric current mobility status of circuit, the judged result that draws combined with ifq circuit just can analyze the short dot present position exactly.From the above-mentioned course of work as can be seen, the utility model comes short dot is carried out analysis and judgement by the distribution of field signal dexterously, need not the disconnect circuit element when using, and saves cost, and have convenient to operation, search advantage accurately.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is the block diagram of system of the present utility model;
Fig. 2 is the circuit diagram of a kind of embodiment of using the utility model and detecting;
Fig. 3 is the circuit diagram of the another kind of embodiment that uses the utility model and detect.
Embodiment
With reference to Fig. 1, a kind of tester that utilizes electromagnetic induction principle to seek the short dot particular location of the present utility model, comprise the signal generator 1 that is used to export variable-current, the signal probe 2 that is used for the change detected field signal, detection signal processing section 3 and display device 4, the output terminal of described signal generator 1 is connected to first lead end 5 and second lead end 6 that is used for being connected with circuit board line respectively, and described signal probe 2 is connected with display device 4 by detection signal processing section 3.In the product of reality, signal generator 1 and display device 4 generally are integrated in the main frame, first lead end 5 and second lead end 6 are connected on the output terminal of signal generator 1 by signal transmssion line, preferably be provided with the indicating section that whether forms the loop between first lead end 5 and second lead end 6 on the main frame, and generally also be provided with and be used for the setting section that signal type that signal generator is exported and signal intensity are regulated, signal probe 2 and detection signal processing section 3 are integrated on the device of a pen-like shape, and this device is connected with main frame by signal transmssion line.
When needs carry out short-circuit detecting to a certain faulty circuit plate, the user can guide to signal on the circuit board by first lead end 5 and second lead end 6, with to utilize multimeter to detect the principle of short circuit line identical, whether the user forms the loop and just can investigate out the short circuit line part apace by observing first lead end 5 and second lead end 6 between different circuit point.After finding the short circuit line part, continue the output of holding signal generator 1, what signal generator 1 was exported is variable-current, the size of this electric current or direction or size and Orientation can continue to change in time, magnetic effect of electric current principle according to oersted, this electric current induces the field signal of variation near circuit in the out-of-date meeting in short circuit line upper reaches, signal probe 2 detects the field signal of this variation in the mobile mode of cruising, utilize display device 4 to show after the signal process signal processing part divisional processing that detection obtains, people just can recognize the field signal situation of signal probe 2 present positions by the displaying contents of display device 4, and then judge 2 electric current mobility status of signal probe near circuit, the judged result that draws is combined with ifq circuit just can analyze the short dot present position exactly.
Detection signal processing section 3 preferably includes one-level amplifying circuit 7, be used for the change detected field signal and induce electromagnetic induction pick-up unit 8, second amplifying circuit 9 and the A/D change-over circuit 10 of electric field signal, the input end of described one-level amplifying circuit 7 is connected with signal probe 2, the output terminal of one-level amplifying circuit 7 is connected with electromagnetic induction pick-up unit 8, and the output terminal of electromagnetic induction pick-up unit 8 links to each other with display device 4 by second amplifying circuit 9 and A/D change-over circuit 10 successively.Above-mentioned electromagnetic induction pick-up unit 8 is based on the Faraday's electromagnetic induction law making, the field signal that signal probe 2 is detected is sent to the input end of electromagnetic induction pick-up unit 8 after amplifying, because this field signal is time dependent, therefore electromagnetic induction pick-up unit 8 can induce electric field signal, and this electric field signal is delivered to display device 4 again and shown after amplification and A/D conversion.
Below application process of the present utility model is illustrated.
With reference to Fig. 2, this circuit is an anti-electromagnetic interference (EMI), filtering circuit.Suppose certain capacitance short-circuit wherein and cause occurring between net1 and the net2 short circuit, need find now and be specially which electric capacity and repaired.Traditional service technique adopts short circuit tester of the present utility model then can realize apace not realizing under the situation to the parts dismounting.Its method is as follows: first lead end 5 and second lead end 6 are received respectively on net1 and the net2, signal probe 2 cruises mobile near this circuit, because not having the electric capacity of short circuit not have electric current passes through, signal probe 2 can't detect the variation magnetic field signal when moving near these electric capacity, in case and short circuit (as the C2 among the figure) appears in electric capacity, electric current flows through on one's body from it, signal probe 2 just can detect the variation magnetic field signal, display device 4 also can show accordingly result, user and then judge the particular location of short circuit capacitance.
The circuit of Fig. 3 is the circuit theory diagrams of the organic support plate of a BGA packaged integrated circuits.Suppose certain BGA short circuit wherein and cause occurring between net1 and the net2 short circuit, the user only needs by first lead end 5 and second lead end 6 electric current that changes to be received respectively on net1 and the net2, it is mobile to utilize signal probe 2 to cruise near this circuit again, when signal probe 2 moves to BGA4 among fault BGA(such as the figure) when going up, display device 4 can demonstrate on this BGA has electric current to pass through, and it is the fault present position that the user can judge this BGA.
Claims (2)
1. tester that utilizes electromagnetic induction principle to seek the short dot particular location, it is characterized in that comprising the signal generator (1) that is used to export variable-current, the signal probe (2) that is used for the change detected field signal, detection signal processing section (3) and display device (4), the output terminal of described signal generator (1) is connected to first lead end (5) and second lead end (6) that is used for being connected with circuit board line respectively, and described signal probe (2) is connected with display device (4) by detection signal processing section (3).
2. a kind of tester that utilizes electromagnetic induction principle to seek the short dot particular location according to claim 1, it is characterized in that described detection signal processing section (3) comprises one-level amplifying circuit (7), be used for the change detected field signal and induce the electromagnetic induction pick-up unit (8) of electric field signal, second amplifying circuit (9) and A/D change-over circuit (10), the input end of described one-level amplifying circuit (7) is connected with signal probe (2), the output terminal of one-level amplifying circuit (7) is connected with electromagnetic induction pick-up unit (8), and the output terminal of electromagnetic induction pick-up unit (8) links to each other with display device (4) by second amplifying circuit (9) and A/D change-over circuit (10) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205249840U CN201765291U (en) | 2010-09-10 | 2010-09-10 | Tester using electromagnetic induction principle to look for short circuit point position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205249840U CN201765291U (en) | 2010-09-10 | 2010-09-10 | Tester using electromagnetic induction principle to look for short circuit point position |
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| Publication Number | Publication Date |
|---|---|
| CN201765291U true CN201765291U (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205249840U Expired - Lifetime CN201765291U (en) | 2010-09-10 | 2010-09-10 | Tester using electromagnetic induction principle to look for short circuit point position |
Country Status (1)
| Country | Link |
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| CN (1) | CN201765291U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203897A (en) * | 2014-06-23 | 2015-12-30 | 展讯通信（上海）有限公司 | Method for detecting short-circuited device on circuit board |
| CN108226695A (en) * | 2018-01-02 | 2018-06-29 | 京东方科技集团股份有限公司 | The detection of adjacent metal lines short circuit and positioning device and method |
| CN109444718A (en) * | 2018-12-04 | 2019-03-08 | 奥士康科技股份有限公司 | Short analytical equipment and analysis method in a kind of pcb board |
| CN109946565A (en) * | 2019-03-20 | 2019-06-28 | 天津大学 | A kind of household electric wire fault point locating device |
| CN112578264A (en) * | 2020-11-25 | 2021-03-30 | 海鹰企业集团有限责任公司 | Positioning device for various short circuit points of circuit board card |
| CN113219364A (en) * | 2021-05-12 | 2021-08-06 | 常州易控汽车电子股份有限公司 | Power supply short circuit positioning mechanism |
-
2010
- 2010-09-10 CN CN2010205249840U patent/CN201765291U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203897A (en) * | 2014-06-23 | 2015-12-30 | 展讯通信（上海）有限公司 | Method for detecting short-circuited device on circuit board |
| CN108226695A (en) * | 2018-01-02 | 2018-06-29 | 京东方科技集团股份有限公司 | The detection of adjacent metal lines short circuit and positioning device and method |
| CN109444718A (en) * | 2018-12-04 | 2019-03-08 | 奥士康科技股份有限公司 | Short analytical equipment and analysis method in a kind of pcb board |
| CN109946565A (en) * | 2019-03-20 | 2019-06-28 | 天津大学 | A kind of household electric wire fault point locating device |
| CN112578264A (en) * | 2020-11-25 | 2021-03-30 | 海鹰企业集团有限责任公司 | Positioning device for various short circuit points of circuit board card |
| CN113219364A (en) * | 2021-05-12 | 2021-08-06 | 常州易控汽车电子股份有限公司 | Power supply short circuit positioning mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GUANGDONG JATEN ROBOT + AUTOMATION CO., LTD. Free format text: FORMER OWNER: FU ZHIYUN Effective date: 20140227 |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140227 Address after: 528300, No. 3, block 13, Daliang Industrial Park, Shunde District, Foshan, Guangdong, Fengxiang 40-41 Patentee after: GUANGDONG JATEN ROBOT & AUTOMATION CO., LTD. Address before: 528300 Guangdong province Foshan city Daliang District Shunde town Fengxiang Commercial Plaza, 2 floor jaten Electronics Patentee before: Fu Zhiyun |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110316 |
|
| CX01 | Expiry of patent term |