CN203232092U - PCB voltage test circuit and tool - Google Patents
PCB voltage test circuit and tool Download PDFInfo
- Publication number
- CN203232092U CN203232092U CN 201320239969 CN201320239969U CN203232092U CN 203232092 U CN203232092 U CN 203232092U CN 201320239969 CN201320239969 CN 201320239969 CN 201320239969 U CN201320239969 U CN 201320239969U CN 203232092 U CN203232092 U CN 203232092U
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Abstract
The utility model discloses a PCB voltage test circuit and a tool. The PCB voltage test circuit comprises a voltage detection switching circuit, a processor, an analog-to-digital conversion circuit and a display driver circuit, wherein input terminals of the voltage detection switching circuit are connected with corresponding output terminals of multi-channel voltages, an output terminal of the voltage detection switching circuit is connected with an input terminal of the analog-to-digital conversion circuit, and a control terminal of the voltage detection switching circuit is connected with the processor to switch the multi-channel voltage signals according to the control of the processor; an output terminal of the analog-to-digital conversion circuit is connected with the processor, a control terminal of the analog-to-digital conversion circuit is connected with the processor, and the voltage detection signals switched by the voltage detection switching circuit are converted from analog to digital according to the control of the processor and output to the processor; and the processor is connected with the display driver circuit. The PCB voltage test circuit and the tool have the advantages that automatic detection of the PCB voltage is achieved and detection efficiency of the PCB voltage is improved.
Description
Technical field
The utility model relates to the voltage tester field of pcb board, relates in particular to a kind of circuit for testing voltage and tool of pcb board.
Background technology
Measurement jig is a kind of some operations that are used for testing in semi-manufacture/finished product or the production link, judges with this whether measurand has reached the mechanical assist device of initial designs person's purpose.For example, in the production run of pcb board, need test the voltage of pcb board.Present voltage tester is by manually testing complex operation step, and erroneous judgement easily.
The utility model content
Fundamental purpose of the present utility model provides a kind of circuit for testing voltage of pcb board, is intended to realize the automatic detection of pcb board voltage, has also improved the voltage detecting efficient of pcb board simultaneously.
For reaching above purpose, the circuit for testing voltage of a kind of pcb board that the utility model provides comprises: voltage detecting commutation circuit, processor and analog to digital conversion circuit and display driver circuit; Wherein,
The input end of described voltage detecting commutation circuit is corresponding to be connected with the plurality of voltages output terminal, the output terminal of described voltage detecting commutation circuit is connected with the input end of analog to digital conversion circuit, the control end of described voltage detecting commutation circuit is connected with processor, carries out the switching of plurality of voltages detection signal according to the control of processor;
The output terminal of analog-digital conversion circuit as described is connected with processor, the control end of analog-digital conversion circuit as described is connected with processor, according to the control of processor, after the voltage detection signal that described voltage detecting commutation circuit is switched carries out analog to digital conversion, export processor to;
Described processor is connected with display driver circuit, and the voltage signal of analog to digital conversion circuit output is carried out test analysis, and exports test result to display driver circuit and show.
Preferably, described voltage detecting commutation circuit comprises a plurality of voltage detecting circuits, and this voltage detecting circuit comprises that coil one end of relay, described relay connects power supply, and the other end connects the control end of processor; The moving contact ground connection of described relay, first stationary contact connects the input end of voltage, and second stationary contact connects the signal end of voltage.
Preferably, described voltage detecting commutation circuit is an integrated I2C relay array circuit board.
Preferably, described processor and analog to digital conversion circuit are an integrated special digital processing single chip circuit board.
The utility model also provides a kind of voltage tester tool of pcb board, comprise housing, the rocking bar that is arranged on circuit for testing voltage in the housing, the test of pcb board is positioned, also be provided with the power button, control button and the display screen that are electrically connected with described circuit for testing voltage plate on the housing, described circuit for testing voltage plate arranges the circuit for testing voltage of above-mentioned pcb board.
Preferably, also be provided with the communication interface that is electrically connected with described circuit for testing voltage plate on the described housing, with data transmission that the circuit for testing voltage plate is tested to external device (ED).
The utility model embodiment has realized the automatic detection of pcb board voltage by voltage detecting commutation circuit, processor and analog to digital conversion circuit, and the voltage detecting commutation circuit can detect the voltage of a plurality of electrical voltage points, has improved the efficient of pcb board voltage detecting.
Description of drawings
Fig. 1 is the high-level schematic functional block diagram of circuit for testing voltage one embodiment of the utility model pcb board;
Fig. 2 is the structural representation of voltage detecting circuit in the circuit for testing voltage of the utility model pcb board;
Fig. 3 is the structural representation of the voltage tester tool of the utility model pcb board.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Further specify the technical solution of the utility model below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
With reference to Fig. 1, circuit for testing voltage one embodiment of a kind of pcb board of the utility model is proposed.The circuit for testing voltage 100 of the pcb board of this embodiment comprises: voltage detecting commutation circuit 10, processor 20 and analog to digital conversion circuit 30 and display driver circuit 40; Wherein,
The input end of described voltage detecting commutation circuit 10 is corresponding to be connected with the plurality of voltages output terminal, the output terminal of described voltage detecting commutation circuit 10 is connected with the input end of analog to digital conversion circuit 30, the control end of described voltage detecting commutation circuit 10 is connected with processor 20, carries out the switching of plurality of voltages detection signal according to the control of processor 20.This plurality of voltages output terminal is each detection solder joint or the pin on the pcb board.This voltage detecting commutation circuit 10 comprises a plurality of voltage detecting circuits 11.With reference to Fig. 2, be example with a voltage detecting circuit, this voltage detecting circuit comprises that coil one end of relay K 1, described relay K 1 connects power supply+5V, the other end connects the control end of processor 10; The moving contact ground connection VGND1 of described relay K 1, first stationary contact connects voltage input end VIN1, and second stationary contact connects signal end KD1.This voltage detecting circuit 11 also comprises LED 1, is used for showing the voltage input end connection of this voltage detecting circuit.In the present embodiment, the coil of relay K 1 is when outage, and moving contact connects second stationary contact, and the coil of relay is when energising, and moving contact connects first stationary contact.When the voltage input end that needs voltage detecting circuit 11 is connected, then at the control end OUT1 of this voltage detecting circuit 11 input low level signal, the coil electricity of relay K 1 then, LED 1 is lighted, moving contact switches and also to connect first stationary contact, and then the magnitude of voltage that detects of this voltage detecting circuit 11 will input to processor 20.Above-mentioned voltage detecting commutation circuit 10 is an integrated I
2C relay array circuit board can be tested nearly 64 electrical voltage points.
In order to reduce the control pin of processor 10, can between processor 10 and voltage detecting circuit 11, add corresponding I/O port expansion circuit and buffer circuit, the input end of this I/O port expansion circuit is connected with the control pin of processor 10, output terminal is connected with buffer circuit, and the output of buffer circuit is corresponding to be connected with the control end OUT of voltage detecting circuit 11.In the present embodiment, the I/O port expansion circuit is an integrated chip, and the model of its chip is PCF8574.The input port of this integrated chip is 3, and output port is 7.Can save the control pin of processor 10 by the I/O port expansion circuit, behind 13 control signal buffer memorys to the I/O port expansion circuit of cache circuit, the control end OUT of input voltage detection circuit 11 again.
The output terminal of analog-digital conversion circuit as described 30 is connected with processor 20, the control end of analog-digital conversion circuit as described 30 is connected with processor 20, according to the control of processor 20, after the voltage detection signal that described voltage detecting commutation circuit 10 is switched carries out analog to digital conversion, export processor 20 to.When voltage detecting commutation circuit 10 is connected voltage input end, the magnitude of voltage of this voltage input end will input to analog to digital conversion circuit 30,30 control signals according to processor 20 of analog to digital conversion circuit are carried out analog to digital conversion, and export the result of its conversion to processor 20.In the present embodiment, analog to digital conversion circuit 30 is an integrated chip, and the model of this chip is AD7715, and the model of processor 20 is SIC89C51.Described processor 20 is an integrated special digital processing single chip circuit board with analog to digital conversion circuit 30.By the parameter of revising in the processor 20 quantity of required measuring voltage and the voltage range of locking can be set, thereby can strictly control product quality, reduce hardware cost.
Described processor 20 is connected with display driver circuit 40, and the voltage signal of analog to digital conversion circuit 30 output is carried out test analysis, and exports test result to display driver circuit 40 and show.After processor 20 receives the voltage signal of analog to digital conversion circuit 30 output, can judge this magnitude of voltage whether in normal range, and export judged result to display driver circuit 40, to be shown to the user.Be specially, processor 20 arranges a Compare Logic circuit, compares for the magnitude of voltage after the comparison analog to digital conversion and the magnitude of voltage of normal range, to produce comparative result (for example, 0 or 1 electric signal).Simultaneously, this voltage signal also exports display driver circuit 40 to and shows.
The utility model embodiment is by voltage detecting commutation circuit 10, processor 20 and analog to digital conversion circuit 30, realized the automatic detection of pcb board voltage, and voltage detecting commutation circuit 10 can detect the voltage of a plurality of electrical voltage points, improved the efficient of pcb board voltage detecting.
With reference to Fig. 3, the voltage tester tool of a kind of pcb board of the utility model is proposed.The voltage tester tool of this pcb board comprises housing 101, the rocking bar 102 that is arranged on circuit for testing voltage 100 in the housing 101, the test of pcb board is positioned, also be provided with the power button 103, control button 104 and the display screen 105 that are electrically connected with described circuit for testing voltage plate 100 on the housing 101, described circuit for testing voltage plate 100 is provided with the circuit for testing voltage of the pcb board of above-described embodiment, just repeats no more at this.
When measurement jig is tested, open the swivelling cover 1011 that arranges on the housing 101, tested pcb board is placed on the pre-position of housing 101, controlling rocking bar 102 then makes tested pcb board move to certain location, so that the probe on the circuit for testing voltage plate 100 contacts with electrical voltage point on the tested pcb board, thereby the voltage of the electrical voltage point on 100 pairs of tested pcb boards of control circuit for testing voltage is tested, and output test result, to show at display screen 105.Above-mentioned operating key 104 can comprise beginning key, stop key etc.
Further, also be provided with the communication interface (not shown) that is electrically connected with described circuit for testing voltage plate 100 on the above-mentioned housing 101, with data transmission that circuit for testing voltage plate 100 is tested to external device (ED).
The utility model embodiment has realized the automatic detection of pcb board voltage, and can detect the voltage of a plurality of electrical voltage points by being arranged on the circuit for testing voltage plate 100 in the housing 101, improved the efficient of pcb board voltage detecting.In addition, move to certain location by the tested pcb board of rocking bar 102 controls, so that circuit for testing voltage plate 100 can detect the voltage of pcb board exactly.
The above only is preferred embodiment of the present utility model; be not so limit its claim; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (6)
1. the circuit for testing voltage of a pcb board is characterized in that, comprising: voltage detecting commutation circuit, processor and analog to digital conversion circuit and display driver circuit; Wherein,
The input end of described voltage detecting commutation circuit is corresponding to be connected with the plurality of voltages output terminal, the output terminal of described voltage detecting commutation circuit is connected with the input end of analog to digital conversion circuit, the control end of described voltage detecting commutation circuit is connected with processor, carries out the switching of plurality of voltages detection signal according to the control of processor;
The output terminal of analog-digital conversion circuit as described is connected with processor, the control end of analog-digital conversion circuit as described is connected with processor, according to the control of processor, after the voltage detection signal that described voltage detecting commutation circuit is switched carries out analog to digital conversion, export processor to;
Described processor is connected with display driver circuit, and the voltage signal of analog to digital conversion circuit output is carried out test analysis, and exports test result to display driver circuit and show.
2. the circuit for testing voltage of pcb board according to claim 1, it is characterized in that, described voltage detecting commutation circuit comprises a plurality of voltage detecting circuits, and this voltage detecting circuit comprises that coil one end of relay, described relay connects power supply, and the other end connects the control end of processor; The moving contact ground connection of described relay, first stationary contact connects the input end of voltage, and second stationary contact connects the signal end of voltage.
3. the circuit for testing voltage of pcb board according to claim 2 is characterized in that, described voltage detecting commutation circuit is an integrated I2C relay array circuit board.
4. the circuit for testing voltage of pcb board according to claim 1 is characterized in that, described processor and analog to digital conversion circuit are an integrated special digital processing single chip circuit board.
5. the voltage tester tool of a pcb board, it is characterized in that, comprise housing, the rocking bar that is arranged on circuit for testing voltage in the housing, the test of pcb board is positioned, also be provided with the power button, control button and the display screen that are electrically connected with described circuit for testing voltage plate on the housing, described circuit for testing voltage plate is provided with the circuit for testing voltage of each described pcb board of claim 1-4.
6. the voltage tester tool of pcb board according to claim 5 is characterized in that, also is provided with the communication interface that is electrically connected with described circuit for testing voltage plate on the described housing, with data transmission that the circuit for testing voltage plate is tested to external device (ED).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320239969 CN203232092U (en) | 2013-05-06 | 2013-05-06 | PCB voltage test circuit and tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320239969 CN203232092U (en) | 2013-05-06 | 2013-05-06 | PCB voltage test circuit and tool |
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| CN203232092U true CN203232092U (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320239969 Expired - Fee Related CN203232092U (en) | 2013-05-06 | 2013-05-06 | PCB voltage test circuit and tool |
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| CN (1) | CN203232092U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606992A (en) * | 2016-02-02 | 2016-05-25 | 京东方科技集团股份有限公司 | LCM circuit detection apparatus and method for detecting LCM circuit |
| CN109991469A (en) * | 2019-04-19 | 2019-07-09 | 江苏菲沃泰纳米科技有限公司 | Multiple groups circuital current detection method and system |
-
2013
- 2013-05-06 CN CN 201320239969 patent/CN203232092U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606992A (en) * | 2016-02-02 | 2016-05-25 | 京东方科技集团股份有限公司 | LCM circuit detection apparatus and method for detecting LCM circuit |
| CN105606992B (en) * | 2016-02-02 | 2018-12-25 | 京东方科技集团股份有限公司 | LCM circuit checker and the method that LCM circuit is detected |
| CN109991469A (en) * | 2019-04-19 | 2019-07-09 | 江苏菲沃泰纳米科技有限公司 | Multiple groups circuital current detection method and system |
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| Date | Code | Title | Description |
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| 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: 20131009 Termination date: 20200506 |
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| CF01 | Termination of patent right due to non-payment of annual fee |