CN114942376B - Circuit board signal detection device and detection method - Google Patents
Circuit board signal detection device and detection method Download PDFInfo
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- CN114942376B CN114942376B CN202210551436.4A CN202210551436A CN114942376B CN 114942376 B CN114942376 B CN 114942376B CN 202210551436 A CN202210551436 A CN 202210551436A CN 114942376 B CN114942376 B CN 114942376B
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- 238000001514 detection method Methods 0.000 title claims abstract description 82
- 238000012360 testing method Methods 0.000 claims abstract description 11
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
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- 229910001220 stainless steel Inorganic materials 0.000 description 3
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- XDDAORKBJWWYJS-UHFFFAOYSA-N glyphosate Chemical compound OC(=O)CNCP(O)(O)=O XDDAORKBJWWYJS-UHFFFAOYSA-N 0.000 description 1
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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]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The application provides a circuit board signal detection device and a detection method, the detection device comprises a controller, a bottom plate, a circuit board placing seat, a light source testing component arranged above the bottom plate and a rotating component for driving the light source ranging component to rotate, the detection device firstly receives a drawing of a circuit board to be detected through the controller and acquires two-dimensional coordinates of each contact point on the circuit board to be detected according to the drawing of the circuit board to be detected, then vertically irradiates a positioning point on the circuit board to be detected through a light beam emitted by the light source ranging component, the controller controls the transmission assembly to drive the light source ranging assembly to rotate according to the position coordinates of the points to be tested on the bottom plate, so that the light beam emitted by the light source ranging assembly irradiates the points to be tested, and a user can quickly and accurately find the points to be tested on the circuit board in various points, and the detection efficiency and the detection accuracy are improved.
Description
Technical Field
The embodiment of the application relates to the technical field of circuit board detection, in particular to a circuit board signal detection device and a detection method.
Background
A printed circuit board (Printed Circuit Board, abbreviated as PCB) is one of the important components of the electronics industry. The device can provide mechanical support for fixing and assembling various electronic components of an integrated circuit and the like, realize wiring and electrical connection or electrical insulation among the various electronic components of the integrated circuit and the like, provide required electrical characteristics such as characteristic impedance and the like, provide a solder resist pattern for automatic soldering, and provide identification characters and patterns for component insertion, inspection, maintenance and the like.
Almost every electronic device, such as electronic watches, calculators, computers, communications electronics, and military weapon systems, use a circuit board to electrically interconnect electronic components as long as it has electronic components such as integrated circuits. Along with the push of market demand, the development amount and the production amount of circuit boards are increasing, and signal detection is required to be performed on the circuit boards in the development process and the production process so as to verify the quality of the circuit boards. In the related art, a procedure for detecting signals of a circuit board is generally 1) finding logic signals to be tested on a schematic circuit diagram. 2) And manually searching the position of the circuit board contact corresponding to the signal in the circuit board diagram, wherein the circuit board contact is the point to be tested. 3) The physical location of the point to be tested is found manually on the circuit board entity. 4) The probe of the hand-operated test device is in contact with the point to be tested on the circuit board. 5) The test results were observed on a test device. 6) And manually comparing whether the test result accords with the design expectation.
However, in the above-mentioned circuit board signal detection process, it is difficult to find the point to be tested on the circuit board fast and accurately by manpower, and the detection efficiency is low.
Disclosure of Invention
The embodiment of the application provides a circuit board signal detection device and a detection method, which are used for solving the technical problems that a point to be detected on a circuit board is difficult to quickly and accurately find manually in the process of detecting a circuit board signal, and the detection efficiency is low.
The embodiment of the application provides the following technical scheme for solving the technical problems:
a circuit board signal detection device, comprising:
A bottom plate;
The circuit board placing seats are at least provided with one group, each group of circuit board placing seats at least comprises one circuit board placing seat, the circuit board placing seats of different groups are adapted to circuit boards to be tested of different sizes, each group of circuit board placing seats is configured to select one circuit board placing seat to be used for placing the circuit board to be tested when the circuit board to be tested, which is adapted to one group of circuit board placing seats, is detected, the circuit board placing seat with the circuit board to be tested is installed on the bottom plate, and the position of the circuit board placing seat on the bottom plate is adjustable;
The controller receives the drawing of the circuit board to be tested, and acquires the two-dimensional coordinates of each contact on the circuit board to be tested according to the drawing of the circuit board to be tested, wherein each contact comprises a bonding pad and/or a pin;
The light source ranging component is arranged above the bottom plate and is in communication connection with the controller, and is configured to emit a light beam perpendicular to the circuit board to be measured when the circuit board placement seat is mounted on the bottom plate, the light source ranging component is used for detecting the distance between the light source ranging component and the positioning point and feeding back the distance to the controller by adjusting the position of the circuit board placement seat so that the length direction of the circuit board is parallel to the first direction of the bottom plate and the width direction of the circuit board is parallel to the second direction of the bottom plate, and the light beam emitted by the light source ranging component irradiates the positioning point of the circuit board to be measured to determine the position coordinates of each contact point of the circuit board to be measured on the bottom plate, wherein the positioning point is any point of each contact point and is perpendicular to the second direction;
The rotating assembly is arranged above the bottom plate and used for driving the light source ranging assembly to rotate, the rotating assembly is in communication connection with the controller, and the controller controls the rotating assembly to drive the light source ranging assembly to rotate according to the position coordinates of the point to be tested on the bottom plate and the distance between the light source ranging assembly and the positioning points, so that the light beam emitted by the light source ranging assembly irradiates the point to be tested, and the point to be tested is one point in each contact.
The circuit board signal detection device provided by the embodiment of the application has the beneficial effects that firstly, the drawing of the circuit board to be detected is received through the controller, the two-dimensional coordinates of each contact point on the circuit board to be detected are obtained according to the drawing of the circuit board to be detected, then, the light beams emitted by the light source ranging component vertically irradiate on the positioning points on the circuit board to be detected to determine the position coordinates of each contact point on the bottom plate of the circuit board to be detected, and the controller controls the transmission component to drive the light source ranging component to rotate according to the position coordinates of the point to be detected on the bottom plate and the distance between the light source ranging component and the positioning points, so that the light beams emitted by the light source ranging component irradiate on the point to be detected, a user can quickly and accurately find the point to be detected on the circuit board in various contact points, the detection efficiency and the detection accuracy are improved, and the difficulty of circuit board detection is reduced.
In one possible implementation manner, the circuit board placement seat comprises a positioning part and a placement part arranged at the upper part of the positioning part, wherein the placement part is used for placing the circuit board to be tested;
A ferromagnetic substance layer is arranged on the bottom plate;
The lower part of the positioning part is provided with at least one magnet area, each magnet area is internally provided with a magnet, and when the circuit board placing seat is placed on the bottom plate, the circuit board placing seat is adsorbed on the bottom plate through the magnet;
The upper portion of location portion is provided with electromagnetic shield layer, electromagnetic shield layer is used for preventing each electromagnetic signal that magnet produced is to placing the interference that the circuit board that awaits measuring that places on the portion caused.
In one possible implementation manner, the positioning portion has a cuboid structure, and when the circuit board to be tested is placed on the placement portion, the length direction of the circuit board to be tested is the same as the length direction of the positioning portion, and the width direction of the circuit board to be tested is the same as the width direction of the positioning portion;
The bottom plate is provided with a plurality of longitudinal indication lines and a plurality of transverse indication strips, the longitudinal indication strips and the transverse indication strips are crisscrossed to form a grid structure, the longitudinal indication strips extend in the first direction, and the transverse indication strips extend in the second direction.
In one possible embodiment, the placement part comprises four identical supporting legs, each supporting leg is provided with a notch, each notch is provided with an L-shaped side wall and a bottom surface, and the four L-shaped side walls are enclosed to form a rectangular structure;
The circuit board to be tested is a rectangular plate, when the circuit board to be tested is placed on the placement part, four vertex angles of the circuit board to be tested are respectively placed in the four notches, and two side edges of each vertex angle of the circuit board to be tested are respectively attached to L-shaped side walls of the corresponding notch.
In one possible implementation manner, the placement portion further includes a plurality of struts, the struts are disposed inside a rectangular structure formed by enclosing the four L-shaped side walls, and the height of each strut is the same as the distance between the bottom surface of each notch and the upper end surface of the positioning portion.
In one possible embodiment, the number of the struts is five, one of the five struts is located at the center of the rectangular structure formed by surrounding the four L-shaped side walls, and the remaining four struts are located around the center of the rectangular structure formed by surrounding the four L-shaped side walls.
In one possible implementation manner, the light source ranging component is a laser ranging device, and when the circuit board to be measured is detected, the laser ranging device emits visible laser to irradiate the positioning point on the circuit board to be measured, and the distance between the light source ranging component and the positioning point is detected at the same time.
In one possible implementation manner, the device further comprises a stand column and a supporting beam arranged on the stand column, wherein the stand column is vertically arranged on the bottom plate, and the supporting beam is arranged above the bottom plate;
the rotating assembly is arranged on the supporting beam, and the rotating assembly is arranged above the middle of the bottom plate, so that when the light source ranging assembly emits light beams perpendicular to the circuit board to be tested, the light beams irradiate on the middle of the bottom plate.
In one possible embodiment, the device further comprises a rotating beam rotatably arranged on the upright, wherein the rotating beam is arranged above the bottom plate and below the supporting beam;
the rotating beam is provided with a mechanical arm, and the mechanical arm is configured to grasp a probe for detecting the circuit board to be detected according to the position coordinates of the point to be detected on the bottom plate and move the probe to detect the circuit board to be detected.
The embodiment of the application also provides a circuit board signal detection method, which adopts the circuit board signal detection device according to any scheme to detect the circuit board to be detected, and comprises the following steps:
the controller receives a drawing of a circuit board to be tested and acquires two-dimensional coordinates of each contact on the circuit board to be tested according to the drawing of the circuit board to be tested;
The controller controls the light source ranging component to emit laser perpendicular to the circuit board to be tested which is placed on the bottom plate;
The position of the circuit board placing seat is adjusted, so that a light beam emitted by the light source ranging component irradiates on a positioning point on the circuit board to be measured, the length direction of the circuit board is parallel to the first direction of the bottom plate, and the width direction of the circuit board is parallel to the second direction of the bottom plate;
The controller determines the position coordinates of each contact point of the circuit board to be tested on the bottom plate according to the two-dimensional coordinates of the positioning point on the circuit board to be tested;
The controller controls the light source ranging assembly to detect the distance between the light source ranging assembly and the positioning point;
The controller acquires the distance between the light source ranging component and the positioning point, and controls the rotating component to drive the light source ranging component to rotate according to the distance between the light source ranging component and the positioning point and the position coordinate of the point to be tested on the bottom plate, so that the light beam emitted by the light source ranging component irradiates the point to be tested;
and detecting signals of the point to be tested irradiated by the light source ranging component.
The beneficial effects of the circuit board signal detection method provided by the embodiment of the application are the same as those of the circuit board signal detection device, and are not repeated here.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic diagram of a circuit board signal detection device according to an embodiment of the present application;
FIG. 2 is a schematic view of a circuit board holder;
Fig. 3 is a schematic view showing the distribution of the magnet area under the positioning portion.
Reference numerals illustrate:
100. A bottom plate;
200. A circuit board placement seat;
210. a positioning part, 220, a placement part;
211. A magnet region;
221. Legs, 222, support;
2211. 2212, L-shaped side walls, 2213, bottom surfaces;
300. A light source ranging assembly;
400. A rotating assembly;
500. A column;
600. a support beam;
700. A rotating beam;
800. And (5) a mechanical arm.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
In the related art, a procedure for detecting signals of a circuit board is generally 1) finding logic signals to be tested on a schematic circuit diagram. 2) And manually searching the position of the circuit board contact corresponding to the signal in the circuit board diagram, wherein the circuit board contact is the point to be tested. 3) The physical location of the point to be tested is found manually on the circuit board entity. 4) The probe of the hand-operated test device is in contact with the point to be tested on the circuit board. 5) The test results were observed on a test device. 6) And manually comparing whether the test result accords with the design expectation. However, the contacts on the circuit board are numerous and densely distributed, and the manual searching of the to-be-detected points is time-consuming and labor-consuming, so that the detection efficiency is low, and the inaccuracy of the detection data or the time waste of reconfirming the positions of the to-be-detected points can be caused by the fact that the searched to-be-detected points are not accurate.
Therefore, the embodiment of the application receives the drawing of the circuit board to be tested through the controller and acquires the two-dimensional coordinates of each contact point on the circuit board to be tested according to the drawing of the circuit board to be tested, then the position coordinates of each contact point on the circuit board to be tested are determined by vertically irradiating the positioning point on the circuit board to be tested and the two-dimensional coordinates of the positioning point on the circuit board to be tested through the light beam emitted by the light source ranging component, and the controller controls the transmission component to drive the light source ranging component to rotate according to the position coordinates of the point to be tested on the circuit board to be tested, so that the light beam emitted by the light source ranging component irradiates the point to be tested, a user can quickly and accurately find the point to be tested on the circuit board in a plurality of contacts, the detection efficiency and the detection accuracy are improved, and the difficulty of circuit board detection is reduced.
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Fig. 1 is a schematic structural view of a circuit board signal detecting device according to an embodiment of the application, and fig. 2 is a schematic structural view of a circuit board placing seat.
As shown in fig. 1 and 2, the circuit board signal detection device provided in this embodiment includes a base plate 100, at least one group of circuit board placement bases 200, a controller, a light source ranging assembly 300 disposed above the base plate 100, and a rotating assembly 400, where the rotating assembly 400 is configured to drive the light source ranging assembly 300 to rotate, so that light beams emitted by the light source ranging assembly 300 can be irradiated to different positions.
In the embodiment of the present application, at least one group of the circuit board placing seats 200 is provided, that is, the circuit board placing seats 200 may be provided with one group, two groups, three groups, five groups, six groups, etc. Each set of circuit board placing seats 200 at least comprises one circuit board placing seat 200, and different sets of circuit board placing seats 200 are adapted to circuit boards to be tested with different sizes, that is, one set of circuit board placing seats 200 is adapted to circuit boards to be tested with one size. Each set of circuit board placing seats 200 is configured such that, when the circuit board to be tested adapted to one set of circuit board placing seats 200 is tested, one of the circuit board placing seats 200 is selected for placing the circuit board to be tested, the circuit board placing seat 200 with the circuit board to be tested placed thereon is mounted on the base plate 100, and the position of the circuit board placing seat 200 on the base plate 100 is adjustable, so that the circuit board placing seat 200 can accurately position the circuit board to be tested in cooperation with the light source ranging assembly 300 described below. That is, when detecting the circuit board to be tested, the user first determines the size of the circuit board to be tested, then selects the circuit board placing seat 200 matching the size of the circuit board to be tested, places the circuit board to be tested on the circuit board placing seat 200, and then installs the circuit board to be tested on the bottom board 100 through the circuit board placing seat 200, thereby realizing the placement of the circuit board to be tested on the bottom board 100. Different circuit board placing seats 200 can be selected for different sizes of circuit boards to be tested, and the circuit boards to be tested are installed on the bottom plate 100 through the circuit board placing seats 200, so that the circuit board signal detection device provided by the embodiment of the application can be suitable for detecting the circuit boards with different sizes, and is wide in application range. In addition, the circuit board placing seat 200 can be customized according to the size of the circuit board to be tested, so that the circuit board signal detection device provided by the embodiment of the application can be suitable for circuit boards to be tested with various sizes, and the applicable places are wide. Especially, aiming at the prior art, the structure of the circuit board is diversified, one electronic device can correspond to hundreds of circuit boards, the updating speed of each circuit board is very high, if one detection device is designed for each circuit board, the detection precision is not high, and if the detection device is continuously updated according to the updating of the circuit board, the additional cost is required, so that the cost of updating the detection device caused by the updating of the circuit board can be saved.
In the embodiment of the application, the controller is used for receiving the drawing of the circuit board to be tested and acquiring the two-dimensional coordinates of each contact point on the circuit board to be tested according to the drawing of the circuit board to be tested, wherein each contact point comprises a bonding pad and/or a pin, that is, a user uploads the drawing of the circuit board to be tested to the controller, and the controller receives the drawing of the circuit board to be tested and acquires the two-dimensional coordinates of each contact point on the circuit board to be tested, namely the coordinates of each contact point on the plane of the circuit board according to the drawing.
The light source ranging assembly 300 is in communication connection with the controller, and the light source ranging assembly 300 is configured such that when the circuit board placing seat 200 is mounted on the bottom board 100, the light source ranging assembly 300 emits a light beam perpendicular to the circuit board to be measured, the position of the circuit board placing seat 200 is adjusted so that the length direction of the circuit board is parallel to the first direction of the bottom board 100, the width direction of the circuit board is parallel to the second direction of the bottom board 100, and the light beam emitted by the light source ranging assembly 300 irradiates a positioning point on the circuit board to be measured to determine the position coordinates of each contact point of the circuit board to be measured on the bottom board 100, the positioning point is any point of each contact point, and the first direction is perpendicular to the second direction. That is, the light source ranging module 300 is fixed above the base plate 100, the light source ranging module 300 is vertically irradiated on the base plate 100, the length direction of the circuit board is parallel to the first direction of the base plate 100, the width direction of the circuit board is parallel to the second direction of the base plate 100, and the position coordinates of each contact point of the circuit board to be measured on the base plate 100 can be determined according to the two-dimensional coordinates of the positioning point on the circuit board to be measured. In the embodiment of the present application, the position of the circuit board placing seat 200 is adjustable, so that the light beam emitted by the light source ranging assembly 300 can accurately irradiate onto one of the contacts (positioning points) on the circuit board to be measured, that is, when the circuit board placing seat 200 is mounted on the bottom plate 100, the light beam emitted by the light source ranging assembly 300 may irradiate onto the area of the circuit board where no contact is provided or onto the contact which is uncertain by the user, and at this time, the position of the circuit board placing seat 200 is adjusted, so that the light beam emitted by the light source ranging assembly 300 can irradiate onto the contact determined by the user, thereby determining the position coordinate of the circuit board to be measured on the bottom plate 100.
The light source ranging assembly 300 is further configured such that the light source ranging assembly 300 detects a distance between the light source ranging assembly 300 and a positioning point and feeds back the distance to the controller.
The rotating assembly 400 is in communication connection with a controller, and the controller controls the rotating assembly 400 to drive the light source ranging assembly 300 to rotate according to the position coordinates of the point to be tested on the base plate 100 and the distance between the light source ranging assembly 300 and the positioning point, so that the light beam emitted by the light source ranging assembly 300 irradiates the point to be tested, and the point to be tested is one of all the contacts. That is, the distance between the light source ranging module 300 and the positioning point is determined, and the deflection angle of the rotating module 400 can be calculated according to the right triangle theorem by determining the position coordinates of the point to be tested on the base plate 100.
In the embodiment of the application, the circuit board signal detection device provided by the embodiment of the application firstly receives the drawing of the circuit board to be detected through the controller and acquires the two-dimensional coordinates of each contact point on the circuit board to be detected according to the drawing of the circuit board to be detected, then the light beam emitted by the light source ranging component 300 is vertically irradiated on the positioning point of the circuit board to be detected, the position coordinates of each contact point of the circuit board to be detected on the bottom plate 100 are determined according to the two-dimensional coordinates of the positioning point on the circuit board to be detected, and the controller controls the transmission component to drive the light source ranging component 300 to rotate according to the position coordinates of the point to be detected on the bottom plate 100 and the distance between the light source ranging component 300 and the positioning point, so that the light beam emitted by the light source ranging component 300 irradiates the point to be detected, a user can rapidly and accurately find the point to be detected on the circuit board in a plurality of contact points, the detection efficiency and the detection accuracy are improved, and the difficulty of the circuit board detection is reduced.
In some embodiments of the present application, the rotating assembly 400 includes a first rotating assembly and a second rotating assembly (not shown in the drawings), the light source ranging assembly 300 is disposed on the first rotating assembly, the first rotating assembly can drive the light source ranging assembly 300 to rotate, so that the light spot irradiated on the circuit board to be tested by the light beam emitted by the light source ranging assembly 300 can move along the first direction, the first rotating assembly is disposed on the second rotating assembly, the second rotating assembly can drive the first rotating assembly and the light source ranging assembly 300 to rotate, so that the light spot irradiated on the circuit board to be tested by the light beam emitted by the light source ranging assembly 300 can move along the second direction, and the first rotating assembly and the second rotating assembly cooperate to enable the light beam emitted by the light source ranging assembly 300 to irradiate on the point to be tested. Alternatively, the first rotating assembly and the second rotating assembly have the same structure, and the first rotating assembly includes a rotating shaft and a motor driving the rotating shaft to rotate, the light source ranging assembly 300 is disposed on the rotating shaft, and the first rotating assembly is disposed on the rotating shaft of the second rotating assembly.
In some embodiments of the present application, the circuit board placement base 200 includes a positioning portion 210 and a placement portion 220 disposed on an upper portion of the positioning portion 210, where the placement portion 220 is used for placing a circuit board to be tested, a ferromagnetic material layer is disposed on the base plate 100, and an iron plate layer is disposed on the optional base plate 100, where the iron plate layer is covered with a smooth plastic layer, and the plastic layer can prevent the iron plate layer from rusting. The lower part of the positioning part 210 is provided with at least one magnet area 211, magnets are arranged in each magnet area 211, when the circuit board placing seat 200 is placed on the bottom plate 100, the circuit board placing seat 200 is adsorbed on the bottom plate 100 through the magnets, the circuit board placing seat 200 is fixed in a magnet adsorption mode, simplicity and convenience are realized, the replacement of the circuit board placing seat 200 is convenient, and meanwhile, the position of the circuit board placing seat 200 is convenient to adjust, and the position of the circuit board placing seat 200 can be adjusted at will so that the position of the circuit board placing seat 200 meets the requirements.
In order to place the magnets to generate electromagnetic interference to the circuit board to be tested, an electromagnetic shielding layer is arranged on the upper portion of the positioning portion 210, the electromagnetic shielding layer is used for preventing electromagnetic signals generated by the magnets from interfering the circuit board to be tested placed on the placement portion 220, and a magnet area 211 is arranged on the lower portion of the positioning portion 210 to place the magnets, so that the area of the magnets can be reduced, and the electromagnetic interference generated by the magnets to the circuit board to be tested is further reduced. Optionally, the electromagnetic shielding layer is a stainless steel layer. Alternatively, the positioning portion 210 and the placement portion 220 are integrally formed injection molding pieces, the stainless steel layer is a hierarchical structure built in the positioning portion 210, or the positioning portion 210 includes an upper portion and a lower portion, the stainless steel plate is disposed between the upper portion of the positioning portion 210 and the lower portion of the positioning portion 210, and the magnet is disposed at the lower portion of the positioning portion 210 through fixed connection by gluing.
Optionally, as shown in fig. 3, four magnet areas 211 are provided at the lower part of the positioning portion 210, the centers of the four magnet areas 211 are sequentially connected to form a rectangular structure, magnet placing grooves are provided at the four magnet areas 211, the magnets are magnet sheets, the magnet sheets are fixed in the magnet placing grooves in an adhesive manner, the strength of the magnets can be small due to the arrangement of the magnet sheets, and the influence on the circuit board to be tested is small. When the circuit board to be detected is detected, the position of the circuit board to be detected is only required to be slightly fixed, so that the adsorption force of the magnet sheet and the iron plate layer can completely meet the requirements.
In order to facilitate that the length direction of the circuit board to be tested is parallel to the first direction of the bottom plate 100, the width direction of the circuit board to be tested is parallel to the second direction of the bottom plate 100, the positioning portion 210 is of a cuboid structure, when the circuit board to be tested is placed on the placement portion 220, the length direction of the circuit board to be tested is identical to the length direction of the positioning portion 210, the width direction of the circuit board to be tested is identical to the width direction of the positioning portion 210, a plurality of longitudinal indication lines and a plurality of transverse indication strips are arranged on the bottom plate 100, the longitudinal indication strips and the transverse indication strips are crisscrossed to form a grid structure, each longitudinal indication strip extends in the first direction, and each transverse indication strip extends in the second direction. When the position of the circuit board placing seat 200 is adjusted, the positioning point is only required to be adjusted to be below the light beam emitted by the light source ranging component 300, namely, the light spot formed by the light beam emitted by the light source ranging component 300 is overlapped with the positioning point, then the length direction of the circuit board placing seat 200 is adjusted to be parallel or overlapped with a certain longitudinal indication strip, the width direction of the circuit board placing seat 200 is parallel or overlapped with a certain transverse indication strip, the length direction of the circuit board to be measured is parallel to the first direction of the bottom plate 100, the width direction of the circuit board to be measured is parallel to the second direction of the bottom plate 100, and the position adjustment of the circuit board placing seat 200 is fast and accurate due to the arrangement.
In some embodiments of the present application, as shown in fig. 2, the placement portion 220 includes four identical supporting legs 221, each supporting leg 221 has a notch 2211, each notch 2211 has an L-shaped side wall 2212 and a bottom surface 2213, the four L-shaped side walls 2212 enclose to form a rectangular structure, when the circuit board to be tested is placed on the placement portion 220, four top corners of the circuit board to be tested are respectively placed in the four notches 2211, and two side edges of each top corner of the circuit board to be tested are respectively attached to the L-shaped side walls 2212 of the corresponding notch 2211. That is, when the circuit board to be tested is placed on the placement portion 220, the circuit board to be tested is just placed in the rectangular structure formed by enclosing the four L-shaped side walls 2212, this arrangement facilitates positioning of the circuit board to be tested, and after the circuit board to be tested is placed in the rectangular structure formed by enclosing the four L-shaped side walls 2212, the length direction of the circuit board to be tested is identical to the length direction of the positioning portion 210, and the width direction of the circuit board to be tested is identical to the width direction of the positioning portion 210.
Further, in order to increase the support of the circuit board to be tested, the placement portion 220 further includes a plurality of pillars 222, the plurality of pillars 222 are disposed inside the rectangular structure formed by enclosing the four L-shaped side walls 2212, and the height of each pillar 222 is the same as the distance between the bottom surface 2213 of each notch 2211 and the upper end surface of the positioning portion 210. This setting can make the circuit board that awaits measuring place when placing on portion 220, and the circuit board that awaits measuring can not enclose the condition that generates the kickdown at four L shape lateral walls 2212 and enclose the inside region of the rectangular structure that forms, has guaranteed the accuracy that each contact was located on the circuit board that awaits measuring.
Alternatively, as shown in fig. 2, the number of the struts 222 is five, and one of the five struts 222 is located at the center of the rectangular structure formed by the four L-shaped side walls 2212, and the remaining four struts 222 are located around the center of the rectangular structure formed by the four L-shaped side walls 2212. The five support posts 222 can make the placement portion 220 support the circuit board to be tested better, so as to avoid the circuit board to be tested from generating buckling deformation.
In some embodiments of the present application, the light source ranging component 300 is a laser ranging device, when the circuit board to be measured is detected, the laser ranging device emits visible laser to irradiate at the positioning point on the circuit board to be measured, and the distance between the light source ranging component 300 and the positioning point is detected at the same time, that is, the laser ranging device serves as a light source emitting light beams and also has the function of measuring the distance between the light source ranging device and the positioning point, and the device is integrated well. Of course, the light source ranging assembly 300 may also be a combination of a light source and a ranging sensor.
The circuit board signal detection device provided by the embodiment of the application further comprises a stand column 500 and a support beam 600 arranged on the stand column 500, wherein the stand column 500 is vertically arranged on the bottom plate 100, the support beam 600 is arranged above the bottom plate 100, the rotating assembly 400 is arranged on the support beam 600, and the rotating assembly 400 is arranged above the middle part of the bottom plate 100, so that when the light source ranging assembly 300 emits a light beam vertical to the circuit board to be detected, the light beam irradiates the middle part of the bottom plate 100. That is, the light source ranging assembly 300 is disposed on the rotating assembly 400, the rotating assembly 400 is disposed above the middle of the bottom plate 100, and the light source ranging assembly 300 is disposed above the middle of the bottom plate 100, so that when the light source ranging apparatus is located at a zero position (the light beam emitted by the light source ranging assembly 300 is vertically downward), the light beam irradiates the middle of the bottom plate 100, and when the positioning point is selected, a contact point located in the middle of the circuit board to be tested can be selected, thereby increasing the selection range of the positioning point.
The detection device provided by the embodiment of the application comprises the following operations when in use:
(1) Inputting a drawing of the circuit board to be tested by a detector, so that the controller obtains the two-dimensional coordinates of the circuit board to be tested according to the input drawing of the circuit board to be tested;
(2) A inspector selects a circuit board placing seat 200 according to the size of the circuit board to be tested, and places the circuit board to be tested on the circuit board placing seat 200;
(3) Moving the circuit board placing seat 200, on which the circuit board to be tested is placed, onto the base plate 100;
(4) Turning on the light source ranging assembly 300, and the light source ranging assembly 300 emits a vertically downward light beam;
(5) Selecting a contact point on the circuit board to be tested as a positioning point, and inputting the two-dimensional coordinate of the positioning point on the circuit board to be tested into the controller;
(6) Moving the circuit board placing seat 200 so that the positioning point coincides with a light spot formed on the circuit board to be measured by the light beam emitted by the light source ranging component 300, the length direction of the circuit board to be measured is parallel to the first direction of the bottom plate 100, the width direction of the circuit board to be measured is parallel to the second direction of the bottom plate 100, thereby the controller confirms the position coordinates of each contact point of the circuit board to be measured on the bottom plate 100, and the light source ranging component 300 feeds back the detected distance between the light source ranging component 300 and the positioning point to the controller;
(7) Inputting a point to be detected, so that the controller controls the rotating assembly 400 to drive the light source detecting assembly to rotate, and the light beam emitted by the light source ranging assembly 300 irradiates the point to be detected;
(8) And a detector selects a probe corresponding to the point to be detected to detect the light spot on the circuit board.
The circuit board signal detection device provided by the embodiment of the application can enable detection staff to easily detect the detection point to be detected, and reduce the detection intensity of the detection staff. The circuit board signal detection device provided by the embodiment of the application is more suitable for research and development detection of circuit boards and circuit board detection in the production of a small number of circuit boards, and because the circuit boards are more in research and development types and less in production quantity, the related technology lacks a device which can be suitable for rapid positioning detection of circuit boards with various sizes, in addition, the circuit boards produced in a small scale are generally limited in production quantity, the detection device is specially designed for the circuit boards, the time and the labor are wasted, the production cost is increased, and the related technology generally adopts manual detection point searching for detection, so that the detection intensity is high, the efficiency is low, and the accuracy is low.
In some possible embodiments of the present application, the circuit board signal detection device further includes a rotating beam 700 rotatably disposed on the upright 500, where the rotating beam 700 is disposed above the bottom plate 100 and below the supporting beam 600, and this arrangement can place the supporting beam 600 interfering with the motion of the mechanical arm 800 described below. The rotating beam 700 is provided with a mechanical arm 800, the mechanical arm 800 is in communication connection with the controller, and the mechanical arm 800 is configured to grasp a probe for detecting the circuit board to be detected according to the position coordinates of the point to be detected on the bottom plate 100 and move the probe to detect the circuit board to be detected. That is, in order to place the interference of the rotating beam 700 and the mechanical arm 800 to the light source detection assembly, when the mechanical arm 800 does not work, the rotating beam 700 rotates to the side of the base plate 100 to be worked, when the positioning of the circuit board to be tested is completed, the mechanical arm 800 rotates to the middle of the circuit board to be tested under the action of the rotating beam 700, and then the mechanical arm 800 grabs a probe for detecting the circuit board to be tested according to the position coordinates of the test point on the base plate 100 and moves the probe to detect the circuit board to be tested. The arrangement of the mechanical arm 800 further reduces the workload of the detection personnel, so that the detection device is more intelligent.
Further, the mechanical arm 800 is provided with a radar and a camera, and the mechanical arm 800 further accurately treats the position of the detection point through the radar and the camera, so that the detection precision of the detection device is further improved.
The embodiment of the application also provides a circuit board signal detection method, which adopts the circuit board signal detection device of any scheme to detect the circuit board to be detected, and comprises the following steps:
the controller receives a drawing of the circuit board to be tested and acquires two-dimensional coordinates of each contact on the circuit board to be tested according to the drawing of the circuit board to be tested;
the controller controls the light source ranging component to emit laser vertical to the circuit board to be tested which is placed on the bottom plate;
The position of the circuit board placing seat is adjusted by a detection personnel or control equipment, so that a light beam emitted by the light source ranging component irradiates on a positioning point on the circuit board to be detected, the length direction of the circuit board is parallel to the first direction of the bottom plate, and the width direction of the circuit board is parallel to the second direction of the bottom plate;
the controller determines the position coordinates of each contact point of the circuit board to be tested on the bottom plate according to the two-dimensional coordinates of the positioning point on the circuit board to be tested;
the controller controls the light source ranging component to detect the distance between the light source ranging component and the positioning point;
the controller obtains the distance between the light source ranging component and the positioning point, and controls the rotating component to drive the light source ranging component to rotate according to the distance between the light source ranging component and the positioning point and the position coordinate of the point to be tested on the bottom plate, so that the light beam emitted by the light source ranging component irradiates the point to be tested;
And detecting signals of the points to be tested irradiated by the light source ranging assembly through the corresponding probes by the detection personnel.
This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
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Citations (1)
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| CN103472384A (en) * | 2013-08-31 | 2013-12-25 | 杭州华为数字技术有限公司 | Location method and location device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3433457A1 (en) * | 1984-09-12 | 1986-03-20 | Roland 4815 Schloß Holte-Stukenbrock Smyczek | Device for marking printed-circuit board defects, and a method of operation for said device |
| US6285200B1 (en) * | 1998-03-02 | 2001-09-04 | Agilent Technologies, Inc. | Apparatus and method for testing integrated circuit devices |
| DE20005123U1 (en) * | 2000-03-20 | 2001-08-02 | atg test systems GmbH & Co. KG Reicholzheim, 97877 Wertheim | Device for testing printed circuit boards |
| CN106604628B (en) * | 2015-10-20 | 2019-07-12 | 泰科电子(上海)有限公司 | System for determining the installation condition of the pin of electric connector |
| GB2545496B (en) * | 2015-12-18 | 2020-06-03 | Teraview Ltd | A Test System |
| CN208206040U (en) * | 2018-03-29 | 2018-12-07 | 烽火通信科技股份有限公司 | A kind of circuit board electronic component height detection apparatus |
| CN208488394U (en) * | 2018-07-17 | 2019-02-12 | 深圳市鹰眼在线电子科技有限公司 | Circuit board detection device |
| CN111781493B (en) * | 2020-07-28 | 2024-08-16 | 北京创元成业科技有限公司 | Circuit board electrical parameter measurement system |
| CN215866445U (en) * | 2021-06-30 | 2022-02-18 | 深圳市华生威实业有限公司 | PCB circuit board intellectual detection system device based on machine vision |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103472384A (en) * | 2013-08-31 | 2013-12-25 | 杭州华为数字技术有限公司 | Location method and location device |
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