CN109557451A - A kind of detection device of circuit board - Google Patents
A kind of detection device of circuit board Download PDFInfo
- Publication number
- CN109557451A CN109557451A CN201811432864.5A CN201811432864A CN109557451A CN 109557451 A CN109557451 A CN 109557451A CN 201811432864 A CN201811432864 A CN 201811432864A CN 109557451 A CN109557451 A CN 109557451A
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- Prior art keywords
- circuit board
- circuit
- data
- detection
- module
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Classifications
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- 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
Abstract
The present invention provides a kind of detection devices of circuit board, based on photoelectric effect principle, pass through the setting of the light source on the photoelectric sensor and workbench of test bar lower end, the photoelectric sensor detection light source intensity of illumination and difference of intensity of illumination judges the quality of via hole after gaging hole after gauge orifice can be compared when detection, such as: the position in hole, aperture and hole blockage；Simultaneously, the present invention is based on loop inductance value testing principles, pass through the setting of circuit detection components, using the inductance value in each circuit of probe in detecting preferred circuit plate and the inductance value in each circuit of circuit board to be detected when detection, and by comparing both the difference of inductance value judge the short-circuit conditions in each circuit of circuit board to be detected.The present invention has the advantages that testing result is accurate, detection efficiency is high, detection time is short, applied widely and at low cost.
Description
Technical field
The present invention relates to circuit board testing field more particularly to a kind of detection devices of circuit board.
Background technique
Formula test in both ends is a kind of commonly used scheme of current circuit board factory in the test of existing contact, existing two
End formula tests the endpoint cloth test probe in the board circuit that need to be detected, and passes through the knot for measuring the board circuit of heterogeneous networks
Whether the resistance value between point is less than acceptable minimum insulation resistance value between two heterogeneous networks of setting, to judge the net that insulate
Whether network has short circuit phenomenon；But there is a kind of circuit of special designing on circuit board, i.e., form each line in circuit in circuit board circuit
Circle circuit itself is in consolidated network, i.e., is mutually in the conductive state；When the originally phase mutual conductance in the consolidated network
Between logical circuit board circuit coil occur short circuit when, electricity enclose value variation be it is very small, in existing resistance test
It can not be detected at all under precision, so, whether coil is intact to be checked by visual observation to circuit board circuit at present, for more
Layer circuit board, inner layer circuit board are separated by insulating layer and outer circuit plate, then again by inner layer circuit board, insulating layer and outer layer
Press fit of circuit boards, in this way, inner layer circuit board circuit coil is not visible, therefore visually inspect can not detection circuit board finished product interior layer line
Circle.
In addition, often resulting in the quality problems in hole during circuit board making, bores, do not drill through, plug-hole such as few, at present
It a certain proportion of do not drill through, bore less or when same batch products the defects of plug-hole, existing technology is to use for occupying
Visually test according to hole mode, and during high-volume examines workpiece, this check system Check-Out Time is long, examines effect
Whether rate is low, and easily missing inspection, in addition, also having the method test aperture that whether can pass through hole using test probe qualified, still
The printing plate of same specification, same position aperture can only be tested, otherwise test board is remake according to the position in different holes,
This check system is at high cost, and checkability is low.
Summary of the invention
Technical problem to be solved by the present invention lies in provide that a kind of testing result is accurate, detection efficiency is high, detection time
The detection device of circuit board short, applied widely and at low cost.
In order to solve the above technical problem, the present invention provides a kind of circuit board detection device, including workbench and meter
Calculation machine, the workbench are equipped with the fixture for fixing circuit board, and the side of the workbench is equipped with for detecting via hole matter
The via hole detection components of amount, the other side of the workbench are equipped with the circuit detection of the short circuit problem for detection circuit board circuit
Component, the computer are used for the data acquired and processing detection arrives, and display testing result；
The via hole detection components include test bar, elevating lever, link block, horizontal slide rail, first longitudinal direction sliding rail and fixation
Column, the bottom of the vertical columns are fixedly arranged on the side of the workbench, and the first longitudinal direction sliding rail is installed in the fixation
The top of column, the horizontal slide rail are vertically disposed on the first longitudinal direction sliding rail, and the horizontal slide rail can be described
It is moved forward and backward on the length direction of one longitudinal slide rail, the link block is set in the horizontal slide rail, the link block energy
It is moved left and right on the length direction of the horizontal slide rail, the upper end of the elevating lever is connect with the link block, the lifting
The lower end of bar is connect with the upper end of the test bar, and the elevating lever can drive the test bar to move up and down, the workbench
It is equipped with light source, the illumination range of the light source is covered in the bottom surface of whole circuit board, and the test bar, which is equipped with, is used for detection light
Source is by the photoelectric sensor of each intensity of illumination after gaging hole；The first longitudinal direction sliding rail is equipped with the first electric pushrod, institute
It states the power output end of the first electric pushrod and the horizontal slide rail connect and the horizontal slide rail can be driven vertical described first
It is moved forward and backward on the length direction of sliding rail, the horizontal slide rail is equipped with the second electric pushrod, second electric pushrod
Power output end connect with the link block and link block left and right on the length direction of the horizontal slide rail can be driven to move
It is dynamic, motor encoder is equipped on the motor of first electric pushrod and second electric pushrod；
The circuit detection components include mobile foundation, vertical rails, crane, second longitudinal direction sliding rail, probe base,
Probe, the second longitudinal direction sliding rail are located at the other side of the workbench and, the movement parallel with the first longitudinal direction sliding rail
Pedestal can be moved forward and backward on the length direction of the second longitudinal direction sliding rail, and the vertical rails are installed in the mobile foundation
On, the crane is set in the vertical rails, and the crane can be on the length direction of the vertical rails up and down
Mobile, the probe base is installed on the crane, and the probe base is equipped with multiple groups probe, the probe energy
It moves left and right on the length direction of the probe base and is moved forward and backward in width direction, the probe and circuit board circuit
Test endpoint position and quantity it is corresponding；
The computer includes data acquisition module, data storage module, data comparison module and data outputting module；
The data acquisition module is electrically connected with the motor encoder, the photoelectric sensor and the probe respectively,
The data acquisition module is used to acquire the gauge orifice coordinate data for the preferred circuit plate that motor encoder is sent, and acquires photoelectricity
Intensity of illumination data of the light source that sensor is sent after each via hole of preferred circuit plate or circuit board to be detected, with
And the inductance Value Data of preferred circuit plate or each circuit of circuit board to be detected that acquisition probe sends over；
The data storage module is electrically connected with the data acquisition module, and the data storage module is for receiving and storing up
The gauge orifice coordinate data for the preferred circuit plate that deposit data acquisition module is sent, light source pass through each via hole of preferred circuit plate
Intensity of illumination data afterwards, and, the inductance Value Data in each circuit of preferred circuit plate；
The data comparison module is exported with the data storage module, the data acquisition module and the data respectively
Module electrical connection, acquisition module sends the light of each via hole of circuit board to be detected to the data comparison module for receiving data
According to the inductance Value Data of intensity data and each circuit, the illumination in each hole of preferred circuit plate is read from data storage module
The inductance Value Data of intensity data and each circuit, and it is respectively compared the intensity of illumination and mark of each via hole of circuit board to be detected
The deviation value of the intensity of illumination of corresponding each via hole in quasi- circuit board, and, the inductance value in each circuit of circuit board to be detected with
The deviation of the inductance value in each circuit in preferred circuit plate, it is defeated to data if each deviation is within the scope of test stone
Module sends the circuit board to be detected by checking information out, and such as any deviation is not within the scope of test stone, to data
Output module sends the not verified information of circuit board to be detected, and the data outputting module compares mould for receiving data
Block send circuit board to be detected testing result and output.
Preferably, further including for providing the current module of detection electric current to probe, the current module is set to
Between the data acquisition module and the probe.
Preferably, the collection terminal of the photoelectric sensor leads to the lower end of the test bar by optical fiber.
Preferably, being equipped with the first spring between the test bar and the elevating lever.
Preferably, being equipped with second spring between the detection plate and the probe.
Preferably, the second longitudinal direction sliding rail is equipped with the first driving mechanism, the power of first driving mechanism
Output end connect with the mobile foundation and can drive the mobile foundation on the length direction of the second longitudinal direction sliding rail before
After move.
Preferably, the vertical rails are equipped with the second driving mechanism, the power output of second driving mechanism
End connect with the crane and the crane can be driven to move up and down on the length direction of the vertical rails.
Preferably, the detector of the test bar is taper.
Preferably, the detector length direction of the test bar is equipped with diameter scale.
The detection device for implementing a kind of circuit board of the invention has the following beneficial effects: compared with prior art
The present invention is based on photoelectric effect principles, pass through the light source on the photoelectric sensor and workbench of test bar lower end
Setting, when detection, can compare intensity of illumination and light source of the photoelectric sensor detection light source behind preferred circuit plate Plays hole
The quality of via hole is judged by the difference of the intensity of illumination in circuit board under test after gaging hole, such as: position, aperture and the hole in hole
Blockage etc., if photoelectric sensor detects light source by the intensity of illumination after gaging hole and the intensity of illumination after gauge orifice
When deviation is not within the scope of test stone, then circuit board is considered as substandard product；If photoelectric sensor detect light source pass through to
After gaging hole intensity of illumination with after gauge orifice intensity of illumination deviation within the scope of test stone when, then circuit board is considered as conjunction
Lattice product；Meanwhile the present invention is based on loop inductance value testing principle, by the setting of above-mentioned circuit detection components, benefit when detection
With the inductance value in each circuit of probe in detecting preferred circuit plate and the inductance value in each circuit of circuit board to be detected, and by comparing
The difference of the two inductance value judges the short-circuit conditions in each circuit of circuit board to be detected, when the inductance in circuit board circuit to be detected
When being worth the deviation of the inductance value in circuit corresponding with preferred circuit plate not within the scope of test stone, then circuit board to be detected regards
For substandard product；When the deviation of the inductance value in the inductance value in circuit board circuit to be detected circuit corresponding with preferred circuit plate
When within the scope of test stone, then circuit board to be detected is considered as qualified products.As it can be seen that the present invention has, testing result is accurate, examines
Survey the advantage that high-efficient, detection time is short, applied widely and at low cost.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, the attached drawing to embodiment is simply situated between below
It continues.
Fig. 1 is a kind of structural schematic diagram of the detection device of circuit board of the invention；
Fig. 2 is a kind of system schematic of the detection device of circuit board of the invention；
Marked in the figure: 1 is workbench, 11 be fixture, and 21 be data acquisition module, and 22 be data storage module, and 23 be number
According to contrast module, 24 be data outputting module, and 25 be current module, and 3 be via hole detection components, and 31 be test bar, and 32 be lifting
Bar, 33 be link block, and 34 be horizontal slide rail, and 35 be first longitudinal direction sliding rail, and 36 be vertical columns, and 37 be photoelectric sensor, and 38 are
Motor encoder, 4 be circuit detection components, and 41 be mobile foundation, and 42 be vertical rails, and 43 be crane, and 44 be second longitudinal direction
Sliding rail, 45 be probe base, and 46 be probe, and 51 be preferred circuit plate, and 52 be circuit board to be detected.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the preferred embodiment of the present invention, a kind of detection device of circuit board, including workbench 1 and calculating
Machine, the workbench 1 are equipped with the fixture 11 for fixing circuit board, and the side of the workbench 1 is equipped with for detecting via hole
The via hole detection components 3 of quality, the other side of the workbench 1 are equipped with the circuit of the short circuit problem for detection circuit board circuit
Detection components 4；
The via hole detection components 3 are sliding including test bar 31, elevating lever 32, link block 33, horizontal slide rail 34, first longitudinal direction
Rail 35 and vertical columns 36, the bottom of the vertical columns 36 are fixedly arranged on the side of the workbench 1, the first longitudinal direction sliding rail
35 are installed in the top of the vertical columns 36, and the horizontal slide rail 34 is vertically disposed on the first longitudinal direction sliding rail 35,
The horizontal slide rail 34 can be moved forward and backward on the length direction of the first longitudinal direction sliding rail 35, and the link block 33 is set to
In the horizontal slide rail 34, the link block 33 can move left and right on the length direction of the horizontal slide rail 34, the lifting
The upper end of bar 32 is connect with the link block 33, and the lower end of the elevating lever 32 is connect with the upper end of the test bar 31, described
Elevating lever 32 can drive the test bar 31 to move up and down, and the workbench 1 is equipped with light source, and the illumination range of the light source covers
It is placed on the bottom surface of whole circuit board, the test bar 31 is equipped with the photoelectricity for detecting light source intensity of illumination after each via hole
Sensor 37；The first longitudinal direction sliding rail 35 be equipped with the first electric pushrod, the power output end of first electric pushrod with
The horizontal slide rail 34 connects and can drive the horizontal slide rail 34 front and back on the length direction of the first longitudinal direction sliding rail 35
Mobile, the horizontal slide rail 34 is equipped with the second electric pushrod, the power output end of second electric pushrod and the connection
Block 33 connects and the link block 33 can be driven to move left and right on the length direction of the horizontal slide rail 34, and described first is electronic
Motor encoder 38 is equipped on the motor of push rod and second electric pushrod；
The circuit detection components 4 include mobile foundation 41, vertical rails 42, crane 43, second longitudinal direction sliding rail 44, visit
Needle fixing seat 45 and probe 46, the second longitudinal direction sliding rail 44 be located at the other side of the workbench 1 and with the first longitudinal direction
Sliding rail 35 is parallel, and the mobile foundation 41 can be moved forward and backward on the length direction of the second longitudinal direction sliding rail 44, described vertical
Sliding rail 42 is installed on the mobile foundation 41, and the crane 43 is set in the vertical rails 42, the crane 43
It can be moved up and down on the length direction of the vertical rails 42, the probe base 45 is installed on the crane 43,
The probe base 45 is equipped with multiple groups probe 46, and the probe 46 can be left on the length direction of the probe base 45
It moves right and is moved forward and backward in width direction, the probe 46 is opposite with the position of the test endpoint in circuit board circuit and quantity
It answers；
The computer includes data acquisition module 21, data storage module 22, data comparison module 23 and data output
Module 24；
The data acquisition module 21 respectively with the motor encoder 38, the photoelectric sensor 37 and the probe 46
Electrical connection, the data acquisition module 21 are used to acquire the gauge orifice coordinate for the preferred circuit plate 51 that motor encoder 38 is sent
Data, the light source that acquisition photoelectric sensor 37 is sent is after each via hole of preferred circuit plate 51 or circuit board to be detected 52
Intensity of illumination data, and, the preferred circuit plate 51 or each circuit of circuit board to be detected 52 that acquisition probe 46 sends over
Inductance Value Data；
The data storage module 22 is electrically connected with the data acquisition module 21, and the data storage module 22 is for connecing
The gauge orifice coordinate data for the preferred circuit plate 51 that data acquisition module 21 is sent is received and stores, light source passes through preferred circuit plate
Intensity of illumination data after 51 each via hole, and, the inductance Value Data in each circuit of preferred circuit plate 51；
The data comparison module 23 respectively with the data storage module 22, the data acquisition module 21 and the number
It is electrically connected according to output module 24, acquisition module 21 sends circuit board to be detected to the data comparison module 23 for receiving data
The intensity of illumination data of 52 each via holes and the inductance Value Data in each circuit, read preferred circuit from data storage module 22
The intensity of illumination data in each hole of plate 51 and the inductance Value Data in each circuit, and it is respectively compared each of circuit board 52 to be detected
The deviation value of the intensity of illumination of a via hole and the intensity of illumination of each via hole corresponding in preferred circuit plate 51, and, electricity to be detected
The deviation of the inductance value in each circuit in the inductance value and preferred circuit plate 51 in each circuit of road plate 52, if each deviation is equal
Within the scope of test stone, the circuit board to be detected 52 is sent to data outputting module 24 and passes through checking information, it is such as any inclined
Difference sends the not verified information of the circuit board to be detected 52 not within the scope of test stone, to data outputting module 24,
The data outputting module 24 testing result of the circuit board to be detected 52 of the transmission of contrast module 23 and output for receiving data.
It illustratively, further include for providing the current module 25 of detection electric current to probe 46, the current module 25 is set
It is placed between the data acquisition module 21 and the probe 46, is adjustable the size for being supplied to the detection electric current of probe 46.
Illustratively, the collection terminal of the photoelectric sensor 37 leads to the lower end of the test bar 31 by optical fiber, can lead to
The thickness of optical fiber is overregulated to be suitable for the detection of the via hole of the various sizes of circuit board in aperture.
Illustratively, between the test bar 31 and the elevating lever 32 be equipped with the first spring, the detection plate with it is described
Second spring is equipped between probe 46, first spring and the second spring work as a buffer, and effectively prevent test bar
Between 31 and circuit board, and, rigid collision occurs between the detection plate and the probe 46 and causes circuit board damage.
Illustratively, the second longitudinal direction sliding rail 44 is equipped with the first driving mechanism, the power of first driving mechanism
Output end connect with the mobile foundation 41 and the mobile foundation 41 can be driven in the length side of the second longitudinal direction sliding rail 44
It is moved forward and backward upwards, realizes automation control, testing result is accurate.
Illustratively, the vertical rails 42 are equipped with the second driving mechanism, the power output of second driving mechanism
End connect with the crane 43 and the crane 43 can be driven to move up and down on the length direction of the vertical rails 42,
Realize automation control, testing result is accurate.
Illustratively, the detector of the test bar 31 is taper, can detect the circuit board of different pore size size.
Illustratively, the detector length direction of the test bar 31 is equipped with diameter scale, and observable via diameter is big
It is small, to judge whether via diameter size is qualified.
As shown in Fig. 2, implementing a kind of detection device of circuit board of the invention, detection process is as follows:
S1: preferred circuit plate 51 is put into workbench 1, will test stick by the first electric pushrod and the second electric pushrod
31 are successively moved to the position opposite with gauge orifice each in preferred circuit plate 51, pass through the motor encoder of the first driving mechanism
38 and second the motor encoder 38 of driving mechanism the standard coordinate data of each position are sent to the data storage of computer
In module 22；Meanwhile intensity of illumination of the light source after each gauge orifice is detected by photoelectric sensor 37, and be converted into telecommunications
It number is sent in the data storage module 22 of computer；
S2: circuit board 52 to be detected is put into workbench 1, and the standard coordinate data obtained according to step S1 will test stick
31 be moved to position corresponding to the standard coordinate data, by photoelectric sensor 37 detect light source pass through circuit board to be detected
Intensity of illumination in 52 after gaging hole, and be converted into electric signal and be sent in data comparison module 23, by data comparison module 23
It calculates whether inclined with the intensity of illumination in 51 Plays hole of preferred circuit plate to the intensity of illumination of gaging hole in circuit board 52 to be detected
Difference；
When the intensity of illumination in circuit board 52 to be detected to the intensity of illumination of gaging hole and 51 Plays hole of preferred circuit plate
When deviation is not within the scope of test stone, decline test bar 31 makes the insertion of its end in gaging hole；
It, will be to if the end of test bar 31 cannot be inserted into in gaging hole, the position of 52 via hole of circuit board to be detected is not right
Detection circuit board 52 is considered as substandard product；
If the end of test bar 31 can be inserted into in gaging hole, test bar 31 resets, when photoelectric sensor 37 detect it is to be checked
Deviation in slowdown monitoring circuit plate 52 to the intensity of illumination of gaging hole and the intensity of illumination in 51 Plays hole of preferred circuit plate does not still exist
When within the scope of test stone, then the diameter dimension of 52 via hole of circuit board to be detected is not right, and circuit board 52 to be detected is considered as and is not conformed to
Lattice product；
If the end of test bar 31 can be inserted into in gaging hole, test bar 31 resets, when photoelectric sensor 37 detect it is to be checked
Mark is being examined to the deviation of the intensity of illumination of gaging hole and the intensity of illumination in 51 Plays hole of preferred circuit plate in slowdown monitoring circuit plate 52
When in quasi- range, then circuit board 52 to be detected is considered as qualification；
S3: it repeats step S2 and is detected to other to gaging hole, complete all inspections to gaging hole in circuit board 52 to be detected
It surveys；
S4: the first driving mechanism and the second driving mechanism will test plate and be moved to and circuit test side in preferred circuit plate 51
The opposite position of point detects the current value between two endpoints by probe 46 and normalized current Value Data is sent to computer
In data storage module 22；
S5: it is mobile that the normalized current Value Data that mobile mechanism obtains according to step S4 in circuit detection components 4 will test plate
To with position corresponding to the normalized current Value Data, the electricity in circuit board 52 to be detected between two endpoints is detected by probe 46
Flow valuve, and electric current Value Data is sent in the data comparison module 23 of computer, while being calculated electric in circuit board 52 to be detected
Flow valuve whether the deviation with 51 Plays current value of preferred circuit plate；
When the deviation for comparing current value and 51 Plays current value of preferred circuit plate in circuit board 52 to be detected is not being examined
When testing in critical field, then the problems such as circuit of circuit board 52 to be detected occurs short circuit, circuit board 52 to be detected is considered as not
Qualified products；
When the deviation for comparing current value and 51 Plays current value of preferred circuit plate in circuit board 52 to be detected is being examined
When in critical field, then circuit board 52 to be detected is considered as qualified products.
The present invention is based on photoelectric effect principles as a result, by the photoelectric sensor and workbench of test bar lower end
The setting of light source, when detection, can compare intensity of illumination of the photoelectric sensor detection light source behind preferred circuit plate Plays hole
The quality of via hole is judged by the difference of the intensity of illumination in circuit board under test after gaging hole with light source, such as: position, the hole in hole
Diameter and the blockage in hole etc., if photoelectric sensor detects light source by the intensity of illumination after gaging hole and the illumination after gauge orifice
When the deviation of intensity is not within the scope of test stone, then circuit board is considered as substandard product；If photoelectric sensor detects light source
When the deviation of intensity of illumination and the intensity of illumination after gauge orifice after gaging hole is within the scope of test stone, then circuit board
It is considered as qualified products；Meanwhile the present invention is based on loop inductance value testing principles, pass through the setting of above-mentioned circuit detection components, inspection
Using the inductance value in each circuit of probe in detecting preferred circuit plate and the inductance value in each circuit of circuit board to be detected when survey, and lead to
The short-circuit conditions for both comparing the difference of inductance value to judge each circuit of circuit board to be detected are crossed, when circuit board circuit to be detected
Inductance value circuit corresponding with preferred circuit plate inductance value deviation not within the scope of test stone when, then electricity to be detected
Road plate is considered as substandard product；When the inductance value in the inductance value in circuit board circuit to be detected circuit corresponding with preferred circuit plate
When deviation is within the scope of test stone, then circuit board to be detected is considered as qualified products.As it can be seen that the present invention has testing result quasi-
Really, the advantage that detection efficiency is high, detection time is short, applied widely and at low cost.
Above disclosed is only presently preferred embodiments of the present invention, cannot limit the right of the present invention with this certainly
Range, therefore according to equivalent variations made by scope of the present invention patent, it is still within the scope of the present invention.
Claims (9)
1. a kind of detection device of circuit board, which is characterized in that including workbench and computer, the workbench is equipped with and is used for
The fixture of fixing circuit board, the side of the workbench are equipped with the via hole detection components for detecting via hole quality, the work
The other side of platform is equipped with the circuit detection components of the short circuit problem for detection circuit board circuit；
The via hole detection components include test bar, elevating lever, link block, horizontal slide rail, first longitudinal direction sliding rail and vertical columns,
The bottom of the vertical columns is fixedly arranged on the side of the workbench, and the first longitudinal direction sliding rail is installed in the vertical columns
Top, the horizontal slide rail are vertically disposed on the first longitudinal direction sliding rail, and the horizontal slide rail can be in the first longitudinal direction
It is moved forward and backward on the length direction of sliding rail, the link block is set in the horizontal slide rail, and the link block can be described
It is moved left and right on the length direction of horizontal slide rail, the upper end of the elevating lever is connect with the link block, under the elevating lever
End is connect with the upper end of the test bar, and the elevating lever can drive the test bar to move up and down, and the workbench is equipped with
Light source, the illumination range of the light source are covered in the bottom surface of whole circuit board, and the test bar is equipped with to be passed through for detecting light source
The photoelectric sensor of intensity of illumination after each via hole；The first longitudinal direction sliding rail is equipped with the first electric pushrod, first electricity
The power output end of dynamic push rod connect with the horizontal slide rail and the horizontal slide rail can be driven in the first longitudinal direction sliding rail
It is moved forward and backward on length direction, the horizontal slide rail is equipped with the second electric pushrod, the power output of second electric pushrod
End connect with the link block and the link block can be driven to move left and right on the length direction of the horizontal slide rail, and described the
Motor encoder is equipped on the motor of one electric pushrod and second electric pushrod；
The circuit detection components include mobile foundation, vertical rails, crane, second longitudinal direction sliding rail, probe base and spy
Needle, the second longitudinal direction sliding rail are located at the other side of the workbench and, the mobile base parallel with the first longitudinal direction sliding rail
Seat can be moved forward and backward on the length direction of the second longitudinal direction sliding rail, and the vertical rails are installed on the mobile foundation,
The crane is set in the vertical rails, the crane can on the length direction of the vertical rails on move down
Dynamic, the probe base is installed on the crane, and the probe base is equipped with multiple groups probe, and the probe can be
It moves left and right on the length direction of the probe base and is moved forward and backward in width direction, the probe and circuit board circuit
Position and the quantity for testing endpoint are corresponding,；
The computer includes data acquisition module, data storage module, data comparison module and data outputting module；
The data acquisition module is electrically connected with the motor encoder, the photoelectric sensor and the probe respectively, described
Data acquisition module is used to acquire the gauge orifice coordinate data for the preferred circuit plate that motor encoder is sent, and acquires photoelectric sensing
Intensity of illumination data of the light source that device is sent after each via hole of preferred circuit plate or circuit board to be detected, and, it adopts
The inductance Value Data of preferred circuit plate or each circuit of circuit board to be detected that collection probe sends over；
The data storage module is electrically connected with the data acquisition module, and the data storage module is for receiving and storing number
According to the gauge orifice coordinate data for the preferred circuit plate that acquisition module is sent, light source is after each via hole of preferred circuit plate
Intensity of illumination data, and, the inductance Value Data in each circuit of preferred circuit plate；
The data comparison module respectively with the data storage module, the data acquisition module and the data outputting module
Electrical connection, the data comparison module for receiving data acquisition module send each via hole of circuit board to be detected illumination it is strong
The inductance Value Data of degree evidence and each circuit reads the intensity of illumination in each hole of preferred circuit plate from data storage module
The inductance Value Data of data and each circuit, and it is respectively compared the intensity of illumination and standard electric of each via hole of circuit board to be detected
The deviation value of the intensity of illumination of corresponding each via hole in the plate of road, and, the inductance value and standard in each circuit of circuit board to be detected
The deviation of the inductance value in each circuit in circuit board, if each deviation exports mould within the scope of test stone, to data
Block sends the circuit board to be detected by checking information, and such as any deviation exports not within the scope of test stone to data
Module sends the not verified information of circuit board to be detected, and the data outputting module for receiving data send out by contrast module
The testing result of the circuit board to be detected sent and output.
2. the detection method of circuit board as described in claim 1, which is characterized in that further include for providing detection electricity to probe
The current module of stream, the current module are set between the data acquisition module and the probe.
3. the detection method of circuit board as described in claim 1, which is characterized in that the collection terminal of the photoelectric sensor passes through
Optical fiber leads to the lower end of the test bar.
4. the detection method of circuit board as described in claim 1, which is characterized in that between the test bar and the elevating lever
Equipped with the first spring.
5. the detection method of circuit board as described in claim 1, which is characterized in that set between the detection plate and the probe
There is second spring.
6. the detection method of circuit board as described in claim 1, which is characterized in that the second longitudinal direction sliding rail is equipped with first
Driving mechanism, the power output end of first driving mechanism connect with the mobile foundation and the mobile foundation can be driven to exist
It is moved forward and backward on the length direction of the second longitudinal direction sliding rail.
7. the detection method of circuit board as described in claim 1, which is characterized in that the vertical rails are equipped with the second driving
Mechanism, the power output end of second driving mechanism connect with the crane and the crane can be driven described vertical
It is moved up and down on the length direction of sliding rail.
8. the detection method of circuit board as described in claim 1, which is characterized in that the detector of the test bar is taper.
9. the detection method of circuit board as claimed in claim 7, which is characterized in that the detector length direction of the test bar
It is equipped with diameter scale.
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| CN201811432864.5A CN109557451B (en) | 2018-11-28 | 2018-11-28 | Detection apparatus for circuit board |
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| CN201811432864.5A CN109557451B (en) | 2018-11-28 | 2018-11-28 | Detection apparatus for circuit board |
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| CN112612082A (en) * | 2019-10-04 | 2021-04-06 | 日本麦可罗尼克斯股份有限公司 | Optical probe, optical probe array, inspection system, and inspection method |
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