CN202025057U - Detector for short circuit and open circuit of printed-circuit board - Google Patents
Detector for short circuit and open circuit of printed-circuit board Download PDFInfo
- Publication number
- CN202025057U CN202025057U CN 201120083918 CN201120083918U CN202025057U CN 202025057 U CN202025057 U CN 202025057U CN 201120083918 CN201120083918 CN 201120083918 CN 201120083918 U CN201120083918 U CN 201120083918U CN 202025057 U CN202025057 U CN 202025057U
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- circuit
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- electrically connected
- open
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Abstract
The utility model discloses a detector for a short circuit and an open circuit of a printed-circuit board, which is characterized by comprising a short circuit detecting circuit, an open circuit detecting circuit and two probes, the input ends of the short circuit detecting circuit and the open circuit detecting circuit are respectively electrically connected with a mains supply, and the two probes are electrically connected with the output ends of the short circuit detecting circuit and the open circuit detecting circuit through a selective switch. The detector integrates a circuit detection function and an open circuit detection function, and carries out changing-over between the circuit detection function and the open circuit detection function by utilizing the selective switch, so that the circuit detection or the open circuit detection can be carried out by utilizing the same pair of probes, an operator has no need to replace tools frequently, the short circuit detection and the open circuit detection of the printed-circuit board are more convenient, and the detection efficiency is also improved.
Description
Technical field
The utility model relates to a kind of pick-up unit of printed circuit board, more particularly, relates to a kind of short circuit, open circuit pick-up unit of printed circuit board.
Background technology
In the detection of printed circuit board, there are shortcomings such as open circuit, short circuit in the shortcoming plate that is come out by the E-TEST Equipment Inspection, also need artificial contrast look into road software to the circuit of shortcoming plate carry out short circuit, open circuit detects, above-mentioned short-circuit detecting detects by specialized equipment, above-mentioned open circuit detects and also detects by specialized equipment, because detecting, the short circuit of existing printed circuit board, open circuit need two kinds of specialized equipments, so, the short circuit of existing printed circuit board, open circuit detect cumbersome, thereby cause detection efficiency to reduce.
The short circuit of printed circuit board for convenience, open circuit detect, and to improve detection efficiency, design a kind of short circuit, open circuit pick-up unit that can be used in printed circuit board, have become the technical matters that present urgent need solves.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of short circuit, open circuit pick-up unit of printed circuit board, and this pick-up unit has short circuit, open circuit measuring ability, thereby makes the short circuit of printed circuit board, open circuit detection become more convenient, has improved detection efficiency.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
A kind of short circuit of printed circuit board, open circuit pick-up unit, it is characterized in that: comprise short-circuit detecting circuit, open detection circuit and two probes, the input end of above-mentioned short-circuit detecting circuit, open detection circuit is electrically connected with civil power respectively, and above-mentioned two probes are electrically connected with the output terminal of short-circuit detecting circuit, open detection circuit by a selector switch.
In the time need carrying out short-circuit detecting to the circuit of shortcoming plate, make two probes and short-circuit detecting circuit conducting by selector switch, so just can carry out short-circuit detecting; In the time need opening a way detection, make two probes and open detection circuit conducting by selector switch, the detection of so just can opening a way to the circuit of shortcoming plate; Therefore, this pick-up unit has short circuit, open circuit detects two kinds of functions, thereby makes the short circuit of printed circuit board, open circuit detection become more convenient, has improved detection efficiency.
Described short-circuit detecting circuit comprises rectifier bridge, charge and discharge capacitance, relay and charge button, the input end of above-mentioned rectifier bridge is electrically connected with civil power, the output terminal of above-mentioned rectifier bridge is electrically connected with two probes by selector switch with after the two ends of charge and discharge capacitance are in parallel again; The control end of the above-mentioned relay back of connecting with charge button is electrically connected with civil power, and a pair of normally opened contact of above-mentioned relay is serially connected between the end of output terminal of rectifier bridge and charge and discharge capacitance.
Because the short-circuit detecting circuit of this pick-up unit adopts rectifier bridge to carry out rectification, the charge and discharge capacitance of this pick-up unit adopt relay to control, so can obtain enough voltage and discharge, can disposable fusing short dot, thus the work efficiency of repairing short board improved; Simultaneously, the discharge of this pick-up unit output is constant, does not have the danger of electric shock, thereby operative employee's safety is guaranteed.
Described open detection circuit comprises transformer, rectifier bridge, wave filter, hummer and light emitting diode, the input end of above-mentioned transformer is electrically connected with civil power, the output terminal of above-mentioned transformer is electrically connected with the input end of rectifier bridge, the output terminal of above-mentioned rectifier bridge is electrically connected with the input end of wave filter, and the output terminal of above-mentioned wave filter is electrically connected with two probes by selector switch; Above-mentioned hummer, light emitting diode are serially connected between the end of output terminal of wave filter and selector switch.
As preferred structure of the present utility model, described wave filter adopts electric capacity, the two ends of above-mentioned electric capacity are with after the output terminal of rectifier bridge is in parallel, wherein an end is with after hummer, light emitting diode are connected in series, be electrically connected with a probe in two probes by selector switch, its other end is electrically connected with another root probe in two probes by selector switch again.
In order to improve the security performance of this pick-up unit, be electrically connected with a fuse between the input end of described short-circuit detecting circuit, open detection circuit and the civil power.
The utility model beneficial effect against existing technologies is:
This pick-up unit integrates electric circuit inspection and two kinds of functions of open circuit detection, carry out the switching of electric circuit inspection function and open circuit measuring ability with a selector switch, like this, use just can carry out electric circuit inspection with a pair of probe or open circuit detects, therefore, the operator does not need frequently to change instrument, thereby makes the short circuit of printed circuit board, open circuit detection become more convenient, has improved detection efficiency.
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model preferred embodiment;
Fig. 2 is the circuit diagram of the utility model preferred embodiment.
Embodiment
As shown in Figure 1 and Figure 2, the printed circuit board short circuit in this preferred embodiment, open circuit pick-up unit comprise short-circuit detecting circuit 1, open detection circuit 2 and two probes 3,4, and above-mentioned short-circuit detecting circuit 1 comprises rectifier bridge Z
1, charge and discharge capacitance C
1, relay J and charge button T, above-mentioned open detection circuit 2 comprises transformer B, rectifier bridge Z
2, wave filter 5, hummer SP and light emitting diode D, above-mentioned wave filter 5 adopts capacitor C
2
In short-circuit detecting circuit 1, rectifier bridge Z
1Input end be electrically connected rectifier bridge Z with civil power V
1Output terminal and charge and discharge capacitance C
1The two ends parallel connection after, be electrically connected with two probes 3,4 by selector switch K again; After connecting with charge button T, the control end of relay J is electrically connected a pair of normally opened contact J of relay J with civil power V
1Be serially connected in rectifier bridge Z
1Output terminal and charge and discharge capacitance C
1An end between;
In open detection circuit 2, the input end of transformer B is electrically connected with civil power V, the output terminal of transformer B and rectifier bridge Z
2Input end be electrically connected rectifier bridge Z
2Output terminal and wave filter 5 be capacitor C
2Input end be electrically connected, wave filter 5 is a capacitor C
2Output terminal be electrically connected with two probes 3,4 by selector switch K; It is capacitor C that hummer SP, light emitting diode D are serially connected in wave filter 5
2Output terminal and the end of selector switch K between; That is to say capacitor C
2Two ends and rectifier bridge Z
2The output terminal parallel connection after, wherein an end is electrically connected with probe 3 by selector switch K with after hummer SP, light emitting diode D are connected in series again, its other end passes through selector switch K and is electrically connected with probe 4;
Be electrically connected with a fuse 6 between the input end of above-mentioned short-circuit detecting circuit 1, open detection circuit 2 and the civil power V.
In the time need carrying out short-circuit detecting to the circuit of shortcoming plate, make two probes 3,4 and short-circuit detecting circuit 1 conducting by selector switch K, press charge button T again, make relay J energising work, thereby make the normally opened contact J of relay J
1Become closure state from normally open, like this, civil power V is through rectifier bridge Z
1The back is to charge and discharge capacitance C
1Charge, after charging finishes, disconnect charge button T, relay J is quit work, thereby make the normally opened contact J of relay J
1Return to normally open; Just can carry out short-circuit detecting to the circuit of shortcoming plate this moment, when there is short circuit in the circuit of shortcoming plate, and charge and discharge capacitance C then
1, two pieces probes 3,4 and shortcoming printed line road constitute a loop, like this, charge and discharge capacitance C
1Just can discharge, and utilize the heat that short-circuit current produces when discharging to blow the place on the short out road of shortcoming printed line, thereby fuse short dot; If there is not short circuit in the circuit of shortcoming plate, charge and discharge capacitance C then
1Two ends can conducting, so, charge and discharge capacitance C
1Can not discharge.
In the time need opening a way detection, make two probes 3,4 and open detection circuit 2 conductings by selector switch K, the detection of so just can opening a way to the circuit of shortcoming plate; If there is not open circuit in the circuit of shortcoming plate, promptly the circuit of shortcoming plate is in conducting state, and then open detection circuit 2, two probes 3,4 and shortcoming printed line road constitute a loop, and like this, civil power V is through transformation, the rectifier bridge Z of transformer B
2Rectification and wave filter 5 be capacitor C
2Filtering after, obtain the galvanic current source, above-mentioned direct supply drives hummer and light emitting diode, thereby make hummer SP energising and sound a buzzer, light emitting diode D energising and luminous, if there is open circuit in the circuit of shortcoming plate, then open detection circuit 2 is in open-circuit condition, therefore, hummer SP is energising and sounding not, not energising and not luminous of light emitting diode D.
The above is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model; Be all equivalents of being done according to claim scope of the present utility model, be claim scope of the present utility model and cover.
Claims (5)
1. the short circuit of a printed circuit board, open circuit pick-up unit, it is characterized in that: comprise short-circuit detecting circuit, open detection circuit and two probes, the input end of above-mentioned short-circuit detecting circuit, open detection circuit is electrically connected with civil power respectively, and above-mentioned two probes are electrically connected with the output terminal of short-circuit detecting circuit, open detection circuit by a selector switch.
2. the short circuit of printed circuit board according to claim 1, open circuit pick-up unit, it is characterized in that: described short-circuit detecting circuit comprises rectifier bridge, charge and discharge capacitance, relay and charge button, the input end of above-mentioned rectifier bridge is electrically connected with civil power, the output terminal of above-mentioned rectifier bridge is electrically connected with two probes by selector switch with after the two ends of charge and discharge capacitance are in parallel again; The control end of the above-mentioned relay back of connecting with charge button is electrically connected with civil power, and a pair of normally opened contact of above-mentioned relay is serially connected between the end of output terminal of rectifier bridge and charge and discharge capacitance.
3. the short circuit of printed circuit board according to claim 1, open circuit pick-up unit, it is characterized in that: described open detection circuit comprises transformer, rectifier bridge, wave filter, hummer and light emitting diode, the input end of above-mentioned transformer is electrically connected with civil power, the output terminal of above-mentioned transformer is electrically connected with the input end of rectifier bridge, the output terminal of above-mentioned rectifier bridge is electrically connected with the input end of wave filter, and the output terminal of above-mentioned wave filter is electrically connected with two probes by selector switch; Above-mentioned hummer, light emitting diode are serially connected between the end of output terminal of wave filter and selector switch.
4. the short circuit of printed circuit board according to claim 3, open circuit pick-up unit, it is characterized in that: described wave filter adopts electric capacity, the two ends of above-mentioned electric capacity are with after the output terminal of rectifier bridge is in parallel, wherein an end is with after hummer, light emitting diode are connected in series, be electrically connected with a probe in two probes by selector switch, its other end is electrically connected with another root probe in two probes by selector switch again.
5. according to short circuit, the open circuit pick-up unit of each described printed circuit board in the claim 1 to 4, it is characterized in that: be electrically connected with a fuse between the input end of described short-circuit detecting circuit, open detection circuit and the civil power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120083918 CN202025057U (en) | 2011-03-26 | 2011-03-26 | Detector for short circuit and open circuit of printed-circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120083918 CN202025057U (en) | 2011-03-26 | 2011-03-26 | Detector for short circuit and open circuit of printed-circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202025057U true CN202025057U (en) | 2011-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120083918 Expired - Fee Related CN202025057U (en) | 2011-03-26 | 2011-03-26 | Detector for short circuit and open circuit of printed-circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202025057U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998581A (en) * | 2012-11-14 | 2013-03-27 | 肇庆理士电源技术有限公司 | Detecting device for resettable fuses of lead-acid batteries |
| CN103063979A (en) * | 2013-01-04 | 2013-04-24 | 合肥市英唐科技有限公司 | Load open-circuit detection circuit |
| TWI468704B (en) * | 2012-11-19 | 2015-01-11 | Ind Tech Res Inst | Method for testing interposer |
| CN106226675A (en) * | 2016-06-27 | 2016-12-14 | 金华安靠电源科技有限公司 | Pcb board opens short-circuit detecting frock |
| CN110275087A (en) * | 2019-07-29 | 2019-09-24 | 中壹发展八五零电子有限公司 | A kind of low pressure life of product experimental rig |
-
2011
- 2011-03-26 CN CN 201120083918 patent/CN202025057U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998581A (en) * | 2012-11-14 | 2013-03-27 | 肇庆理士电源技术有限公司 | Detecting device for resettable fuses of lead-acid batteries |
| CN102998581B (en) * | 2012-11-14 | 2015-05-06 | 肇庆理士电源技术有限公司 | Detecting device for resettable fuses of lead-acid batteries |
| TWI468704B (en) * | 2012-11-19 | 2015-01-11 | Ind Tech Res Inst | Method for testing interposer |
| US9347981B2 (en) | 2012-11-19 | 2016-05-24 | Industrial Technology Research Institute | Test method for interposer |
| CN103063979A (en) * | 2013-01-04 | 2013-04-24 | 合肥市英唐科技有限公司 | Load open-circuit detection circuit |
| CN103063979B (en) * | 2013-01-04 | 2014-12-31 | 合肥市英唐科技有限公司 | Load open-circuit detection circuit |
| CN106226675A (en) * | 2016-06-27 | 2016-12-14 | 金华安靠电源科技有限公司 | Pcb board opens short-circuit detecting frock |
| CN110275087A (en) * | 2019-07-29 | 2019-09-24 | 中壹发展八五零电子有限公司 | A kind of low pressure life of product experimental rig |
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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: 20111102 Termination date: 20150326 |
|
| EXPY | Termination of patent right or utility model |