CN108776297A - Circuit board detection device and method - Google Patents
Circuit board detection device and method Download PDFInfo
- Publication number
- CN108776297A CN108776297A CN201810833789.7A CN201810833789A CN108776297A CN 108776297 A CN108776297 A CN 108776297A CN 201810833789 A CN201810833789 A CN 201810833789A CN 108776297 A CN108776297 A CN 108776297A
- Authority
- CN
- China
- Prior art keywords
- circuit board
- circuit
- detection
- microcontroller
- voltage detecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/281—Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
- G01R31/2812—Checking for open circuits or shorts, e.g. solder bridges; Testing conductivity, resistivity or impedance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
Abstract
The present invention relates to circuit detection technique fields.The present invention is in order to solve the problems, such as that the prior art cannot reliably detect circuit board, provide another circuit board detection device and method, including microcontroller, first relay, impedance detection circuit, voltage detecting circuit and reminding module, the microcontroller is connect by the first relay with circuit board under test power supply contact, microcontroller is connect with impedance detection circuit and voltage detecting circuit respectively, impedance detection circuit and voltage detecting circuit need and circuit board under test contact portion to be measured according to detection, the microcontroller grounding ports are grounded respectively with circuit board under test earthing contact, the reminding module is connect with microcontroller；It is needed to formulate port profile according to detection, microcontroller is detected and exports testing result to circuit board contact resistance to be measured or voltage according to port profile, realizes the reliable detection to circuit board, the detection being suitable for after the completion of board production.
Description
Technical field
The present invention relates to circuit detection technique fields, more particularly to a kind of detection device and method.
Background technology
The circuit board of electronic equipment after production is completed, needs to carry out circuit detection before being powered, to prevent short circuit
Electronic component is caused to damage, therefore, short circuit and voltage detecting are a necessary processes, in the prior art, generally use people
Work detects, or is detected using expensive precision instrument, and artificial detection carries out impedance or electricity using multimeter to contact to be measured
Pressure detection, it is less efficient, using manually being judged, circuit board cannot reliably be detected, and there are the risk of operation error, adopt
It is very high with expensive precision instrument and equipment cost and maintenance cost.
Invention content
The invention aims to solve the problems, such as that the prior art cannot reliably detect circuit board, propose another
Circuit board detection device and method.
Technical solution is used by the present invention solves above-mentioned technical problem：Circuit board detection device, including microcontroller,
First relay, impedance detection circuit, voltage detecting circuit and reminding module, the microcontroller by the first relay with wait for
Slowdown monitoring circuit plate power supply contact connects, and microcontroller is connect with impedance detection circuit and voltage detecting circuit respectively, impedance detection electricity
Road and voltage detecting circuit according to detection need with circuit board under test contact portion to be measured, the microcontroller grounding ports with wait for
Slowdown monitoring circuit plate earthing contact is grounded respectively, and the reminding module is connect with microcontroller；
The microcontroller is sentenced for obtaining and configuring port profile according to port profile and detection information
Whether deenergizing is abnormal, and testing result is exported to reminding module；
First relay, for controlling being connected and disconnected from for microcontroller and circuit board under test power supply contact；
The impedance detection circuit, for carrying out impedance monitoring to circuit board contact to be measured；
The voltage detecting circuit, for carrying out voltage detecting to circuit board contact to be measured；
The reminding module exports testing result for microcontroller.
Further, to solve the problems, such as that circuit board detecting efficiency is slower, the impedance detection circuit includes at least two
Impedance detection circuit, the voltage detecting circuit include at least two voltage detecting circuits, pass through at least two impedance detections electricity
Road and at least two voltage detecting circuits may be implemented contacts to be measured multiple to circuit board and are carried out at the same time impedance detection or voltage
Detection improves detection efficiency.
Further, to solve the problems, such as that development cost is higher, the impedance detection circuit includes the second relay and the
One end of one resistance, second relay is connect with power supply, and the other end is connect with first resistor, the other end point of first resistor
Not with microcontroller and circuit board contact portion to be measured, second relay also connect with microcontroller, microcontroller control
The unlatching and disconnection of second relay, above-mentioned impedance detection circuit is the detection circuit of maturation in the prior art, using above-mentioned resistance
Anti- detection circuit can save R&D costs.
Further, to solve the problems, such as that development cost is higher, the voltage detecting circuit includes second resistance and third
Resistance, one end of the second resistance are separately connected microcontroller and are connected with one end of 3rd resistor, other end ground connection, third electricity
The other end of resistance and circuit board contact portion to be measured, R&D costs can be saved using above-mentioned voltage detecting circuit.
Specifically, the port profile includes port profile head, data length, the circuit quantity of detection, inspection
The acceptability limit of survey pattern, control port quantity and testing result needs port profile according to detection, realizes to circuit
The automatic detection of plate.
Further to solve the problems, such as that circuit board detecting efficiency is slower, the circuit board detection device further include fixture,
Needle and contact portion plate, the folder needle and fixture slidable connection are pressed from both sides, the to be measured contact different for connecting circuit board is described to touch
Point connecting plate is fixedly connected with circuit board under test, and contact portion plate is provided with hole corresponding with circuit board contact to be measured, and folder needle is slided
It inserts in the hole and circuit board contact portion to be measured after dynamic, by pressing from both sides needle slide handover circuit board under test contact portion to be measured and breaking
It opens, is conveniently operated, improve efficiency.
Circuit board detecting method is applied to foregoing circuit board checking device, includes the following steps：
Slip clamp needle makes circuit board under test that the contact detected be needed to be connected with corresponding circuit；
It obtains and configures port profile；
Testing result is exported to reminding module according to port profile and detection information.
Further, it is to realize that the circuit board detecting method includes impedance detection to the impedance detection of circuit board：
Slip clamp needle makes impedance detection circuit and needs impedance detection contact portion；
According to port profile control counterpart impedance detection circuit in need the contact of impedance detection corresponding second after
Electric appliance is attracted, and the first relay disconnects；
It detects the voltage of corresponding impedance detection circuit output end and is AD converted；
The earth impedance for waiting for impedance detection contact is calculated, testing result is exported to reminding module according to port profile.
Further, it is to realize that the circuit board detecting method includes voltage detecting to the voltage detecting of circuit board：
Slip clamp needle makes impedance detection circuit and needs voltage detecting contact portion；
The first relay is controlled according to port profile to be attracted；
It detects the voltage of corresponding voltage detecting circuit output end and is AD converted；
The voltage for waiting for voltage detecting contact is calculated, testing result is exported to reminding module according to port profile.
The beneficial effects of the invention are as follows：Circuit board detection device of the present invention and method, by impedance detection circuit and
Voltage detection circuit is arranged in circuit checker, is needed to formulate port profile according to detection, microcontroller is according to end
Mouth configuration file is detected circuit board contact to be measured, and exports testing result by reminding module, realizes to circuit board
It is same that contacts to be measured multiple to circuit board may be implemented when impedance detection circuit and voltage detection circuit have multiple in reliable detection
Shi Jinhang impedance detections or voltage detecting, efficiency are higher；In addition, when needing to multiple contact detections to be measured, by pressing from both sides needle
Slide handover circuit board under test contact portion to be measured and disconnection, are conveniently operated, and improve efficiency.
Description of the drawings
Fig. 1 is circuit board detection device circuit diagram of the present invention；
Reference sign：
The first relays of K1-, the second relay of K21, K22, K2n-, R11, R12, R1n- first resistor, R21, R22,
R2n- second resistances, R31, R32, R3n- 3rd resistor, L- reminding modules, ADV1, ADV2, ADVn- voltage detecting control port,
ADI1, ADI2, ADIn- impedance detection control port, PWR- power supply contacts, A, B, C- wait for that voltage detecting contact, D, E, F- wait hindering
Anti- detection contact.
Specific implementation mode
Embodiments of the present invention are described in detail below in conjunction with attached drawing.
Circuit board detection device of the present invention, circuit is as shown in Figure 1, including microcontroller, the first relay K1, one
The power control terminal mouth PWR_CTL of a impedance detection circuit, a voltage detecting circuit and reminding module L, microcontroller pass through
First relay K1 is connect with circuit board under test power supply contact PWR, and microcontroller passes through an impedance detection circuit and one respectively
A voltage detecting circuit is connect with circuit board contact C and F to be measured, microcontroller grounding ports and circuit board under test earthing contact point
It is not grounded, reminding module L is connect with microcontroller；MC is for obtaining and configuring port profile, according to port profile
And whether detection information decision circuitry is abnormal, and testing result is exported to reminding module；First relay K1 is micro- for controlling
Controller is connected and disconnected from circuit board under test power supply contact, and impedance detection circuit is for hindering circuit board contact to be measured
Anti- monitoring, voltage detecting circuit are used to carry out voltage detecting to circuit board contact to be measured, and reminding module L is exported for microcontroller
Testing result.
As shown in Figure 1, impedance detection circuit includes the second relay K2n and first resistor R1n, the second relay K2n's
One end is connect with power supply Vi, and the other end is connect with first resistor R1n, and the second relay K2n is also connect with microcontroller, microcontroller
Device controls the unlatching and disconnection of the second relay K2n, and impedance is waited in one end of first resistor R1n with microcontroller and circuit board respectively
Contact C connections are detected, impedance detection circuit may be that other carry out impedance detection circuit, the above-mentioned impedance detection circuit of use
It is more mature, R&D costs can be saved.
Voltage detecting circuit includes second resistance R2n and 3rd resistor R3n, and one end of second resistance R2n is separately connected micro-
One end of controller and 3rd resistor R3n, other end ground connection, the other end and the circuit board of 3rd resistor R3n wait for that voltage detecting is touched
Point F connections, voltage detecting circuit may be that other carry out voltage detecting circuits, the above-mentioned voltage detecting circuit of use more at
It is ripe, R&D costs can be saved.
Circuit board detection device of the present invention may include at least two impedance detection circuits and the inspection of at least two voltages
Slowdown monitoring circuit, as shown in Figure 1, at least two impedance detection circuits include：At least two second relay K21, K22 ..., K2n, until
Few two first resistor R11, R12 ..., R1n, at least two impedance detection circuits waited for respectively with circuit board impedance detection contact D,
E ..., F connections；
At least two voltage detecting circuits include：At least two second resistance R21, R22 ..., R2n, at least two thirds
Resistance R31, R32 ..., R3n, as shown in Figure 1, at least two voltage detecting circuits waited for respectively with circuit board voltage detecting contact A,
B ..., C connections；
It can be realized by least two impedance detection circuits and at least two voltage detecting circuits multiple to circuit board under test
Contact to be measured is carried out at the same time impedance detection or voltage detecting, and efficiency is higher.
Specifically, above-mentioned port profile includes port profile head, data length, the quantity of detection circuit, inspection
The range of survey pattern, control port quantity and testing result；After completing detection, testing result is fed back to PC by microcontroller
End, port profile head configuration file flag information, data length are the data length of port profile, detection circuit
Quantity is that circuit board needs the circuit quantity that detects, related with the circuit design of circuit board, detection pattern be divided into impedance detection and
Voltage detecting, control port quantity are the control port quantity that is needed to circuit board detecting of microcontroller, and need to examine simultaneously
The number of contacts of survey is corresponding, as shown, as voltage detecting control port ADV1, ADV2, ADVn, impedance detection control terminal
The quantity of mouth ADI1, ADI2, ADIn, the normal or abnormal range of results of testing result Range Representation circuit, above-mentioned port is matched
It is to need to formulate at the ends PC according to detection, and be sent to microcontroller to set file.
The circuit board detection device further includes fixture, folder needle and contact portion plate, presss from both sides needle and fixture slidable connection, is used
In the different contact to be measured of connection circuit board, contact portion plate is fixedly connected with circuit board under test, contact portion plate be provided with and
The corresponding hole in circuit board contact to be measured inserts in the hole and circuit board contact portion to be measured after folder needle sliding, can according to detection needs
Slip clamp needle is only needed to can be realized with the multiple contact portions to be measured of circuit board or disconnection, operating personnel using more folder needles, it is convenient
Fast.
Circuit board detecting method of the present invention is applied to foregoing circuit board checking device, includes the following steps：
S1. slip clamp needle makes circuit board that the contact detected be needed to be connected with corresponding circuit；
S2. it is needed to formulate port profile according to detection；
S3. microcontroller obtains and configures port profile；
S4. testing result is exported to reminding module according to port profile and detection information；
Testing result also can be fed back to PC as needed and preserved by microcontroller.
Impedance detection is carried out to circuit board under test to include the following steps：
S11. slip clamp needle makes impedance detection circuit and needs impedance detection contact portion；
If desired impedance detection is carried out at the same time to multiple contacts simultaneously, then sliding more folder needles makes to be connected thereto；
S12. it is controlled according to port profile and needs the contact of impedance detection corresponding the in counterpart impedance detection circuit
Two relays are attracted, and the first relay disconnects；
If desired impedance detection is carried out at the same time to multiple contacts simultaneously, microcontroller then needs to control multiple second relays
It is attracted；
S13. it detects the voltage of corresponding impedance detection loop output and is AD converted；
S14. it calculates and waits for the earth impedance of impedance detection contact, testing result is exported to prompting mould according to port profile
Block；Calculation formula is as follows：
In formula, RXn is to wait for impedance detection contact earth impedance, and ADIn is impedance detection circuit output voltage and carries out AD turns
Voltage after changing, R1n are the resistance value of first resistor, and Vi is impedance detection circuit input voltage.
By above-mentioned impedance detection circuit, may be implemented, to circuit board impedance detection, if desired to hinder multiple contacts
Anti- detection can be carried out at the same time.
Voltage detecting is carried out to circuit board under test to include the following steps：
S21. slip clamp needle makes impedance detection circuit and needs voltage detecting contact portion；
S22. it controls the first relay according to port profile to be attracted, the second relay disconnects；
S23. it detects the voltage of corresponding voltage detecting circuit output end and is AD converted；
S24. the voltage for waiting for voltage detecting contact is calculated, testing result is exported to reminding module according to port profile.
By above-mentioned impedance detection circuit, it may be implemented to detect circuit board voltage, electricity if desired carried out to multiple contacts
Pressure detection, can be carried out at the same time.
For method, since it is substantially similar to device, so description is fairly simple, related place is referring to device
The part of description illustrates.
Claims (9)
1. circuit board detection device, which is characterized in that including microcontroller, the first relay, impedance detection circuit, voltage detecting
Circuit and reminding module, the microcontroller are connect by the first relay with circuit board under test power supply contact, microcontroller point
It is not connect with impedance detection circuit and voltage detecting circuit, impedance detection circuit and voltage detecting circuit are needed and waited for according to detection
Slowdown monitoring circuit plate contact portion to be measured, the microcontroller grounding ports are grounded respectively with circuit board under test earthing contact, described to carry
Show that module is connect with microcontroller；
The microcontroller judges electricity for obtaining and configuring port profile according to port profile and detection information
Whether road is abnormal, and testing result is exported to reminding module；
First relay, for controlling being connected and disconnected from for microcontroller and circuit board under test power supply contact；
The impedance detection circuit, for carrying out impedance monitoring to circuit board contact to be measured；
The voltage detecting circuit, for carrying out voltage detecting to circuit board contact to be measured；
The reminding module exports testing result for microcontroller.
2. circuit board detection device as described in claim 1, which is characterized in that the impedance detection circuit includes at least two
Impedance detection circuit, the voltage detecting circuit include at least two voltage detecting circuits.
3. circuit board detection device as described in claim 1, which is characterized in that the impedance detection circuit includes the second relay
One end of device and first resistor, second relay is connect with power supply, and the other end is connect with first resistor, first resistor it is another
One end waits for that impedance detection contact portion, second relay are also connect with microcontroller with microcontroller and circuit board respectively,
Microcontroller controls the unlatching and disconnection of the second relay.
4. circuit board detection device as described in claim 1, which is characterized in that the voltage detecting circuit includes second resistance
And 3rd resistor, one end of the second resistance are separately connected microcontroller and are connected with one end of 3rd resistor, other end ground connection,
The other end of 3rd resistor waits for voltage detecting contact portion with circuit board.
5. circuit board detection device as described in claim 1, which is characterized in that the port profile includes port configuration
The acceptability limit of file header, data length, the circuit quantity of detection, detection pattern, control port quantity and testing result.
6. such as circuit board detection device described in any one of claim 1 to 5, which is characterized in that further include fixture, press from both sides needle and touch
Point connecting plate, the folder needle and fixture slidable connection, the to be measured contact different for connecting circuit board, the contact portion plate
It is fixedly connected with circuit board under test, contact portion plate is provided with hole corresponding with circuit board contact to be measured, is inserted into after folder needle sliding
Kong Zhongyu circuit boards contact portion to be measured.
7. circuit board detecting method, which is characterized in that be applied to claim 1 to 6 any one of them circuit board detecting such as and fill
It sets, includes the following steps：
Slip clamp needle makes circuit board under test that the contact detected be needed to be connected with corresponding circuit；
It is needed to formulate port profile according to detection；
It obtains and configures port profile；
Testing result is exported to reminding module according to port profile and detection information.
8. circuit board detecting method as claimed in claim 7, which is characterized in that including impedance detection：
Slip clamp needle makes impedance detection circuit and needs impedance detection contact portion；
It is controlled in counterpart impedance detection circuit according to port profile and needs corresponding second relay in the contact of impedance detection
It is attracted, the first relay disconnects；
It detects the voltage of corresponding impedance detection circuit output end and is AD converted；
The earth impedance for waiting for impedance detection contact is calculated, testing result is exported to reminding module according to port profile.
9. circuit board detecting method as claimed in claim 7, which is characterized in that including voltage detecting：
Slip clamp needle makes impedance detection circuit and needs voltage detecting contact portion；
The first relay is controlled according to port profile to be attracted；
It detects the voltage of corresponding voltage detecting circuit output end and is AD converted；
The voltage for waiting for voltage detecting contact is calculated, testing result is exported to reminding module according to port profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833789.7A CN108776297A (en) | 2018-07-26 | 2018-07-26 | Circuit board detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833789.7A CN108776297A (en) | 2018-07-26 | 2018-07-26 | Circuit board detection device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108776297A true CN108776297A (en) | 2018-11-09 |
Family
ID=64031438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810833789.7A Pending CN108776297A (en) | 2018-07-26 | 2018-07-26 | Circuit board detection device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108776297A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112203035A (en) * | 2020-09-30 | 2021-01-08 | 深圳创维－Rgb电子有限公司 | Image input adapter plate and image signal detection system |
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| CN207650242U (en) * | 2017-12-28 | 2018-07-24 | 深圳尚雅致远科技有限公司 | A kind of radio circuit board test fixture |
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| JP4287130B2 (en) * | 2002-12-05 | 2009-07-01 | 東京エレクトロン株式会社 | Capacitance detection circuit and capacitance detection method |
| CN201177652Y (en) * | 2008-04-02 | 2009-01-07 | 深圳国人通信有限公司 | Test system for circuit board |
| CN102163964A (en) * | 2010-02-23 | 2011-08-24 | 瑞昱半导体股份有限公司 | Impedance correcting device and method |
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| CN112203035A (en) * | 2020-09-30 | 2021-01-08 | 深圳创维－Rgb电子有限公司 | Image input adapter plate and image signal detection system |
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Application publication date: 20181109 |