Circuit board signal detection device and detection method

Abstract

The present application provides a circuit board signal detection device and a detection method. The detection device includes a controller, a base plate, a circuit board placement seat, a light source test component arranged above the base plate, and a rotating component for driving the light source distance measurement component to rotate. The detection device first receives a drawing of a circuit board to be tested through the controller and obtains 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, and then vertically irradiates a positioning point on the circuit board to be tested with a light beam emitted by the light source distance measurement component to determine the position coordinates of each contact on the circuit board to be tested on the base plate. The controller controls the transmission component to drive the light source distance measurement component to rotate according to the position coordinates of the point to be tested on the base plate, so that the light beam emitted by the light source distance measurement component irradiates the point to be tested, thereby enabling a user to quickly and accurately find the point to be tested on the circuit board among numerous contacts, thereby improving the detection efficiency and the accuracy of the detection.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of circuit board detection, and in particular to a circuit board signal detection device and detection method. Background Art

[0002] Printed Circuit Board (PCB) is one of the important components of the electronics industry. It can provide mechanical support for the fixation and assembly of various electronic components such as integrated circuits, realize the wiring and electrical connection or electrical insulation between various electronic components such as integrated circuits, provide the required electrical characteristics, such as characteristic impedance, etc., provide solder mask patterns for automatic soldering, and provide identification characters and patterns for component insertion, inspection, and maintenance.

[0003] Nowadays, almost every electronic device, such as electronic watches, calculators, computers, communication electronic equipment and military weapon systems, as long as it has electronic components such as integrated circuits, must use circuit boards to achieve electrical interconnection between electronic components. Driven by market demand, the research and development and production of circuit boards are also increasing day by day. Circuit boards need to perform signal detection during the research and development process and the production process to verify the quality of the circuit board. In the relevant technology, the procedure for circuit board signal detection is usually: 1) Find the logic signal to be tested on the circuit schematic. 2) Manually find the position of the circuit board contact corresponding to the signal in the circuit board diagram, and the circuit board contact is the point to be tested. 3) Manually find the physical position of the point to be tested on the circuit board entity. 4) Manually operate the probe of the detection equipment to contact the point to be tested on the circuit board. 5) Observe the test results on the detection equipment. 6) Manually compare whether the test results are consistent with the design expectations.

[0004] However, in the above-mentioned circuit board signal detection process, it is difficult for humans to quickly and accurately find the points to be tested on the circuit board, and the detection efficiency is low. Summary of the invention

[0005] The embodiments of the present application provide a circuit board signal detection device and a detection method, which are used to solve the technical problem that it is difficult to quickly and accurately find the test points on the circuit board manually during the circuit board signal detection process, and the detection efficiency is low.

[0006] The embodiments of the present application provide the following technical solutions to solve the above technical problems:

[0007] A circuit board signal detection device, comprising:

[0008] Base plate;

[0009] A circuit board placement seat, at least one group is provided, each group of the circuit board placement seats includes at least one circuit board placement seat, different groups of the circuit board placement seats are adapted to circuit boards to be tested of different sizes, and each group of the circuit board placement seats is configured as follows: when a circuit board to be tested adapted to one group of the circuit board placement seats is tested, one of the circuit board placement seats is selected to place the circuit board to be tested, the circuit board placement seat with the circuit board to be tested is installed on the bottom plate, and the position of the circuit board placement seat on the bottom plate is adjustable;

[0010] A controller receives a drawing of the circuit board to be tested, and acquires 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 includes a pad and / or a pin;

[0011] A light source distance measuring component is arranged above the bottom plate, the light source distance measuring component is communicatively connected with the controller, and the light source distance measuring component is configured as follows: when the circuit board placement seat is installed on the bottom plate, the light source distance measuring component emits a light beam perpendicular to the circuit board to be tested, and by adjusting the position of the circuit board placement seat, the length direction of the circuit board is parallel to the first direction of the bottom plate, 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 distance measuring component is irradiated at a positioning point on the circuit board to be tested, so as to determine the position coordinates of each contact of the circuit board to be tested on the bottom plate, the positioning point is any point among the contacts, and the first direction is perpendicular to the second direction; the light source distance measuring component detects the distance between the light source distance measuring component and the positioning point, and feeds the distance back to the controller;

[0012] A rotating component is arranged above the base plate and is used to drive the light source ranging component to rotate. The rotating component is communicatively connected with the controller. The controller controls the rotating component to drive the light source ranging component to rotate according to the position coordinates of the point to be tested on the base plate and the distance between the light source ranging component and the positioning point, so that the light beam emitted by the light source ranging component is irradiated at the point to be tested, and the point to be tested is a point among the contacts.

[0013] Beneficial effects of the embodiments of the present application: the circuit board signal detection device provided in the embodiments of the present application first receives the drawing of the circuit board to be tested through the controller and obtains 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, and then vertically irradiates the positioning point on the circuit board to be tested by the light beam emitted by the light source ranging component to determine the position coordinates of each contact on the circuit board to be tested on the bottom plate. 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 bottom plate and the distance between the light source ranging component and the positioning point, so that the light beam emitted by the light source ranging component is irradiated on the point to be tested, thereby enabling the user to quickly and accurately find the point to be tested on the circuit board among numerous contacts, thereby improving the detection efficiency and accuracy, and reducing the difficulty of circuit board detection; secondly, the circuit board signal detection device provided in the embodiments of the present application includes multiple groups of circuit board placement seats, and the group of circuit board placement seats is adapted to circuit boards of one size, so that the circuit board signal detection device provided in the embodiments of the present application can be applicable to the detection of circuit boards of different sizes, and has a wide range of applications.

[0014] In a possible implementation manner, the circuit board placement seat includes a positioning portion and a placement portion disposed above the positioning portion, and the placement portion is used to place the circuit board to be tested;

[0015] A ferromagnetic material layer is provided on the bottom plate;

[0016] At least one magnet area is provided at the lower part of the positioning part, and each magnet area is provided with a magnet. When the circuit board placement seat is placed on the bottom plate, the circuit board placement seat is adsorbed on the bottom plate through the magnet;

[0017] An electromagnetic shielding layer is disposed on the upper portion of the positioning portion, and the electromagnetic shielding layer is used to prevent the electromagnetic signals generated by the magnets from interfering with the circuit board to be tested placed on the placement portion.

[0018] In a possible implementation, the positioning portion is a rectangular parallelepiped 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;

[0019] The bottom plate is provided with a plurality of longitudinal indicator lines and a plurality of transverse indicator strips, the plurality of longitudinal indicator strips and the plurality of transverse indicator strips are crisscrossed to form a grid structure, and each of the longitudinal indicator strips extends in the first direction, and each of the transverse indicator strips extends in the second direction.

[0020] In a possible implementation, the placement portion includes four identical legs, each of the legs has a notch, and each of the notches has an L-shaped side wall and a bottom surface, and the four L-shaped side walls enclose a rectangular structure;

[0021] The circuit board to be tested is a rectangular plate. When the circuit board to be tested is placed on the placement portion, the four vertex corners of the circuit board to be tested are respectively placed in the four notches, and the two side edges at each vertex corner of the circuit board to be tested are respectively attached to the L-shaped side walls at the corresponding notches.

[0022] In a possible embodiment, the placement portion further includes a plurality of pillars, which are arranged inside a rectangular structure formed by the four L-shaped side walls, and the height of each pillar is the same as the distance between the bottom surface of each notch and the upper end surface of the positioning portion.

[0023] In a possible embodiment, the number of the pillars is set to five, and among the five pillars, one is located at the center of the rectangular structure formed by the four L-shaped side walls, and the remaining four pillars are arranged around the center of the rectangular structure formed by the four L-shaped side walls.

[0024] In a possible implementation, the light source distance measuring component is a laser distance measuring instrument. When the circuit board to be tested is tested, the laser distance measuring instrument emits a visible laser to illuminate a positioning point on the circuit board to be tested, and simultaneously detects the distance between the light source distance measuring component and the positioning point.

[0025] In a possible implementation, it further includes a column and a support beam disposed on the column, wherein the column is vertically disposed on the bottom plate, and the support beam is disposed above the bottom plate;

[0026] 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 distance measuring assembly emits a light beam perpendicular to the circuit board to be tested, the light beam irradiates the middle of the bottom plate.

[0027] In a possible implementation manner, it further includes a rotating beam rotatably disposed on the column, wherein the rotating beam is disposed above the bottom plate and below the supporting beam;

[0028] A mechanical arm is arranged on the rotating beam, and the mechanical arm is configured to grab a probe for detecting the circuit board to be tested according to the position coordinates of the point to be tested on the bottom plate, and move the probe to detect the circuit board to be tested.

[0029] The embodiment of the present application further provides a circuit board signal detection method, wherein the method uses the circuit board signal detection device described in any of the above schemes to detect the circuit board to be tested, and the method includes:

[0030] The controller receives a 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 according to the drawing of the circuit board to be tested;

[0031] The controller controls the light source distance measuring component to emit a laser perpendicular to the circuit board to be tested placed on the bottom plate;

[0032] Adjust the position of the circuit board placement seat so that the light beam emitted by the light source distance measuring component irradiates the positioning point on the circuit board to be tested, and 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;

[0033] 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;

[0034] The controller controls the light source distance measuring component to detect the distance between the light source distance measuring component and the positioning point;

[0035] The controller obtains the distance between the light source distance measuring component and the positioning point, and controls the rotating component to drive the light source distance measuring component to rotate according to the distance between the light source distance measuring component and the positioning point and the position coordinates of the point to be tested on the bottom plate, so that the light beam emitted by the light source distance measuring component irradiates the point to be tested;

[0036] Detect the signal of the point to be tested illuminated by the light source distance measurement component.

[0037] The beneficial effects of the circuit board signal detection method provided in the embodiment of the present application are the same as the beneficial effects of the above-mentioned circuit board signal detection device, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0039] Figure 1 This is a schematic diagram of the structure of a circuit board signal detection device according to an embodiment of the present application;

[0040] Figure 2 It is a structural schematic diagram of a circuit board placement seat;

[0041] Figure 3 Schematic diagram of the magnet area distribution at the bottom of the positioning part.

[0042] Description of reference numerals:

[0043] 100, bottom plate;

[0044] 200, circuit board placement seat;

[0045] 210, positioning portion; 220, placement portion;

[0046] 211, magnet area;

[0047] 221, support leg; 222, support column;

[0048] 2211, notch; 2212, L-shaped side wall; 2213, bottom surface;

[0049] 300, light source ranging component;

[0050] 400, rotating assembly;

[0051] 500, pillar;

[0052] 600, support beam;

[0053] 700, rotating beam;

[0054] 800. Robotic arm.

[0055] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0056] In the related art, the procedure for circuit board signal detection is usually: 1) Find the logic signal to be tested on the circuit schematic. 2) Manually find the position of the circuit board contact corresponding to the signal in the circuit board diagram, and the circuit board contact is the point to be tested. 3) Manually find the physical position of the point to be tested on the circuit board entity. 4) Manually operate the probe of the detection equipment to contact the point to be tested on the circuit board. 5) Observe the test results on the detection equipment. 6) Manually compare the test results with the design expectations to see if they are consistent. However, there are many contacts on the circuit board and they are densely distributed. It is time-consuming and laborious to manually find the points to be tested, and the detection efficiency is low. It may also cause inaccurate detection data due to the wrong point to be tested, or waste time to reconfirm the position of the point to be tested.

[0057] In view of this, the embodiment of the present application receives the drawing of the circuit board to be tested through the controller and obtains 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, and then determines the position coordinates of each contact of the circuit board to be tested on the base plate by vertically irradiating the positioning point on the circuit board to be tested placed on the base plate 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. 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 base plate, so that the light beam emitted by the light source ranging component is irradiated at the point to be tested, thereby enabling the user to quickly and accurately find the point to be tested on the circuit board among the numerous contacts, thereby improving the detection efficiency and accuracy, and reducing the difficulty of circuit board detection.

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] Figure 1 This is a schematic diagram of the structure of a circuit board signal detection device according to an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the circuit board placement seat.

[0060] like Figure 1 and Figure 2 As shown, the circuit board signal detection device provided in this embodiment includes a base plate 100, at least one group of circuit board placement seats 200, a controller, a light source ranging component 300 arranged above the base plate 100, and a rotating component 400. The rotating component 400 is used to drive the light source ranging component 300 to rotate so that the light beam emitted by the light source ranging component 300 can irradiate different positions.

[0061] In the embodiment of the present application, at least one group of circuit board placement seats 200 is provided, that is, the circuit board placement seats 200 can be provided in one group, two groups, three groups, five groups, six groups, etc. Each group of circuit board placement seats 200 includes at least one circuit board placement seat 200, and different groups of circuit board placement seats 200 are adapted to circuit boards to be tested of different sizes, that is, one group of circuit board placement seats 200 is adapted to a circuit board to be tested of one size. Each group of circuit board placement seats 200 is configured as follows: when the circuit board to be tested adapted to one group of circuit board placement seats 200 is tested, one of the circuit board placement seats 200 is selected for placing the circuit board to be tested, and the circuit board placement seat 200 with the circuit board to be tested is installed on the bottom plate 100, and the position of the circuit board placement seat 200 on the bottom plate 100 is adjustable, so that the circuit board placement seat 200 can cooperate with the light source distance measurement component 300 described below to accurately position the circuit board to be tested. That is to say, when detecting the circuit board to be tested, the user first determines the size of the circuit board to be tested, then selects a circuit board placement seat 200 that matches the size of the circuit board to be tested, places the circuit board to be tested on the circuit board placement seat 200, and then installs the circuit board placement seat 200 on the base plate 100 to place the circuit board to be tested on the base plate 100. Different sizes of circuit boards to be tested can use different circuit board placement seats 200, and the circuit board to be tested is installed on the base plate 100 through the circuit board placement seat 200, so that the circuit board signal detection device provided in the embodiment of the present application can be applied to the detection of circuit boards of different sizes, and has a wide range of applications. In addition, the circuit board placement seat 200 can also be customized according to the size of the circuit board to be tested, so that the circuit board signal detection device provided in the embodiment of the present application can be applied to circuit boards of various sizes to be tested, and has a wide range of applicable places. In particular, in the prior art, the structure of circuit boards is diverse, and one electronic device may correspond to hundreds of circuit boards, and the speed of updating and replacing each circuit board is also very fast. If a detection device is designed for each circuit board, it will cost a lot of manpower and material resources. If an unmatched detection device is used, the detection accuracy is not high. If the detection device is continuously updated according to the update of the circuit board, additional costs will be incurred. Therefore, the circuit board signal detection device provided in the embodiment of the present application can save the cost of updating the detection device caused by the updating of the circuit board.

[0062] In an embodiment of the present application, the controller is used to receive a drawing of a circuit board to be tested, and obtain the two-dimensional coordinates of each contact on the circuit board to be tested based on the drawing of the circuit board to be tested, each contact including a pad and / or a pin, that is, the user uploads the drawing of the circuit board to be tested to the controller, the controller receives the drawing of the circuit board to be tested and obtains the two-dimensional coordinates of each contact on the circuit board to be tested based on the drawing, that is, the coordinates of each contact on the plane of the circuit board.

[0063] The light source distance measuring component 300 is connected to the controller for communication. The light source distance measuring component 300 is configured as follows: when the circuit board placement seat 200 is installed on the base plate 100, the light source distance measuring component 300 emits a light beam perpendicular to the circuit board to be tested. By adjusting the position of the circuit board placement seat 200, 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 light beam emitted by the light source distance measuring component 300 is irradiated at the positioning point on the circuit board to be tested, so as to determine the position coordinates of each contact of the circuit board to be tested on the base plate 100, the positioning point is any point among the contacts, and the first direction is perpendicular to the second direction. In other words, the position of the light source distance measuring component 300 located above the base plate 100 is fixed, the position of the light source distance measuring component 300 irradiated vertically on the base plate 100 is fixed, 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 of the circuit board to be tested on the base plate 100 can be determined according to the two-dimensional coordinates of the positioning point on the circuit board to be tested. In the embodiment of the present application, the position of the circuit board placement seat 200 is adjustable so that the vertical downward light beam emitted by the light source ranging component 300 can accurately illuminate one of the contacts (positioning points) on the circuit board to be tested. That is to say, when the circuit board placement seat 200 is installed on the base plate 100, the vertical downward light beam emitted by the light source ranging component 300 may illuminate an area on the circuit board where no contacts are set or illuminate a contact that is not determined by the user. At this time, by adjusting the position of the circuit board placement seat 200, the vertical downward light beam emitted by the light source ranging component 300 can be illuminated at the contact determined by the user, thereby determining the position coordinates of the circuit board to be tested on the base plate 100.

[0064] The light source distance measuring component 300 is further configured to detect the distance between the light source distance measuring component 300 and the positioning point, and feed back the distance to the controller.

[0065] The rotating assembly 400 is connected to the controller for communication. 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 bottom 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 is irradiated at the point to be tested, which is a point among the contact points. In other words, the distance between the light source ranging assembly 300 and the positioning point is determined, and the position coordinates of the point to be tested on the bottom plate 100 are determined. The deflection angle of the rotating assembly 400 can be calculated according to the right triangle theorem.

[0066] In the embodiment of the present application, the circuit board signal detection device provided in the embodiment of the present application first receives the drawing of the circuit board to be tested through the controller and obtains 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, and then the light beam emitted by the light source ranging component 300 is vertically irradiated on the positioning point on the circuit board to be tested, and the position coordinates of each contact of the circuit board to be tested on the base plate 100 are determined according to the two-dimensional coordinates of the positioning point on the circuit board to be tested. 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 tested on the base 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 is irradiated on the point to be tested, so that the user can quickly and accurately find the point to be tested on the circuit board among the numerous contacts, thereby improving the detection efficiency and accuracy, and reducing the difficulty of circuit board detection.

[0067] In some embodiments of the present application, exemplarily, the rotating assembly 400 includes a first rotating assembly and a second rotating assembly (not shown in the figure), the light source ranging assembly 300 is arranged on the first rotating assembly, the first rotating assembly can drive the light source ranging assembly 300 to rotate, so that the light spot emitted by the light source ranging assembly 300 on the circuit board to be tested can move along the first direction, the first rotating assembly is arranged 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 emitted by the light source ranging assembly 300 on the circuit board to be tested can move along the second direction, the first rotating assembly and the second rotating assembly cooperate to enable the light beam emitted by the light source ranging assembly 300 to illuminate the point to be tested. Optionally, the structures of the first rotating assembly and the second rotating assembly are the same, and only the first rotating assembly is exemplarily introduced here, the first rotating assembly includes a rotating shaft and a motor that drives the rotating shaft to rotate, the light source ranging assembly 300 is arranged on the rotating shaft, and the first rotating assembly is arranged on the rotating shaft of the second rotating assembly.

[0068] In some embodiments of the present application, the circuit board placement seat 200 includes a positioning portion 210 and a placement portion 220 disposed on the upper portion of the positioning portion 210, the placement portion 220 is used to place the circuit board to be tested, a ferromagnetic material layer is disposed on the bottom plate 100, and an iron plate layer is optionally disposed on the bottom plate 100, and the iron plate layer is covered with a smooth plastic layer, and the plastic layer can prevent the iron plate layer from rusting. At least one magnet area 211 is disposed at the lower portion of the positioning portion 210, and each magnet area 211 is provided with a magnet. When the circuit board placement seat 200 is placed on the bottom plate 100, the circuit board placement seat 200 is adsorbed on the bottom plate 100 by a magnet. The circuit board placement seat 200 is fixed by magnet adsorption, which is simple and convenient, and is convenient for the replacement of the circuit board placement seat 200, and is also convenient for the position adjustment of the circuit board placement seat 200, and its position can be adjusted arbitrarily so that the position of the circuit board placement seat 200 meets the requirements.

[0069] In order to prevent the placement of magnets from causing electromagnetic interference to the circuit board to be tested, an electromagnetic shielding layer is provided at the upper portion of the positioning portion 210, and the electromagnetic shielding layer is used to prevent the electromagnetic signals generated by each magnet from interfering with the circuit board to be tested placed on the placement portion 220, and the magnet area 211 is provided at the lower portion of the positioning portion 210 to place the magnets, which can reduce the area where the magnets are set, and further reduce the electromagnetic interference caused by the magnets to the circuit board to be tested. Optionally, the electromagnetic shielding layer is a stainless steel layer. Optionally, the positioning portion 210 and the placement portion 220 are integrally formed injection molded parts, and the stainless steel layer is a hierarchical structure built into the positioning portion 210, or the positioning portion 210 includes an upper portion and a lower portion, and the stainless steel plate is provided between the upper portion of the positioning portion 210 and the lower portion of the positioning portion 210, and is fixedly connected by gluing, and the magnet is provided at the lower portion of the positioning portion 210.

[0070] Optional, such as Figure 3 As shown, the lower part of the positioning part 210 is provided with four magnet areas 211, the centers of the four magnet areas 211 are connected in sequence to form a rectangular structure, and magnet placement grooves are provided at the four magnet areas 211. The magnets are magnet sheets, and the magnet sheets are fixed in the magnet placement grooves by gluing. The arrangement of the magnet sheets can make the strength of the magnets small, and have little effect on the circuit board to be tested. Since the position of the circuit board to be tested only needs to be slightly fixed during the detection, the adsorption force between the magnet sheet and the iron plate layer can fully meet the demand.

[0071] In order to facilitate making the length direction of the circuit board to be tested parallel to the first direction of the base plate 100, and the width direction of the circuit board to be tested parallel to the second direction of the base plate 100, the positioning portion 210 is a rectangular parallelepiped 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 the same as the length direction of the positioning portion 210, and the width direction of the circuit board to be tested is the same as the width direction of the positioning portion 210. A plurality of longitudinal indicator lines and a plurality of transverse indicator strips are arranged on the base plate 100. The plurality of longitudinal indicator strips and the plurality of transverse indicator strips are crisscrossed to form a grid structure, and each longitudinal indicator strip extends in the first direction, and each transverse indicator strip extends in the second direction. When adjusting the position of the circuit board placement seat 200, it is only necessary to adjust the positioning point to below the light beam emitted by the light source ranging component 300, that is, to make the light spot formed by the light beam emitted by the light source ranging component 300 coincide with the positioning point, and then adjust the length direction of the circuit board placement seat 200 to be parallel to or coincide with a certain longitudinal indicator bar, and the width direction of the circuit board placement seat 200 to be parallel to or coincide with a certain transverse indicator bar, so that the length direction of the circuit board to be tested is parallel to the first direction of the base plate 100, and the width direction of the circuit board to be tested is parallel to the second direction of the base plate 100. This setting makes the position adjustment of the circuit board placement seat 200 fast and accurate.

[0072] In some embodiments of the present application, Figure 2 As shown, the placement portion 220 includes four identical legs 221, each leg 221 has a notch 2211, and each notch 2211 has an L-shaped side wall 2212 and a bottom surface 2213, and the four L-shaped side walls 2212 enclose a rectangular structure; the circuit board to be tested is a rectangular plate, and when the circuit board to be tested is placed on the placement portion 220, the four vertex corners of the circuit board to be tested are respectively placed in the four notches 2211, and the two sides of the vertex corners of the circuit board to be tested are respectively attached to the L-shaped side walls 2212 at the corresponding notches 2211. In other words, 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 enclosed by the four L-shaped side walls 2212, and this arrangement facilitates the positioning of the circuit board to be tested. After the circuit board to be tested is placed in the rectangular structure enclosed by the four L-shaped side walls 2212, the length direction of the circuit board to be tested can be the same as the length direction of the positioning portion 210, and the width direction of the circuit board to be tested can be the same as the width direction of the positioning portion 210.

[0073] Furthermore, in order to increase the support for the circuit board to be tested, the placement portion 220 further includes a plurality of pillars 222, which are arranged inside the rectangular structure formed by 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 arrangement enables the circuit board to be placed on the placement portion 220 without bending downward in the inner area of ​​the rectangular structure formed by the four L-shaped side walls 2212, thereby ensuring the accuracy of positioning of each contact on the circuit board to be tested.

[0074] Optional, such as Figure 2 As shown, the number of the pillars 222 is set to five, one of the five pillars 222 is located at the center of the rectangular structure formed by the four L-shaped side walls 2212, and the remaining four pillars 222 are arranged around the center of the rectangular structure formed by the four L-shaped side walls 2212. The five pillars 222 can enable the placement portion 220 to better support the circuit board to be tested, and prevent the circuit board to be tested from bending downward.

[0075] In some embodiments of the present application, the light source distance measuring component 300 is a laser distance measuring instrument. When the circuit board to be tested is tested, the laser distance measuring instrument emits a visible laser to illuminate the positioning point on the circuit board to be tested, and at the same time detects the distance between the light source distance measuring component 300 and the positioning point. In other words, the laser distance measuring instrument not only acts as a light source that emits a light beam, but also has the function of measuring the distance between the light source distance measuring instrument and the positioning point. This setting makes the device well integrated. Of course, the light source distance measuring component 300 can also be a combination of a light source and a distance measuring sensor.

[0076] The circuit board signal detection device provided in the embodiment of the present application further includes a column 500 and a support beam 600 disposed on the column 500, the column 500 is vertically disposed on the bottom plate 100, and the support beam 600 is disposed above the bottom plate 100; the rotating assembly 400 is disposed on the support beam 600, and the rotating assembly 400 is disposed above the middle of the bottom plate 100, so that when the light source distance measuring assembly 300 emits a light beam perpendicular to the circuit board to be tested, the light beam irradiates the middle of the bottom plate 100. In other words, the light source distance measuring assembly 300 is disposed on the rotating assembly 400, and the rotating assembly 400 is disposed above the middle of the bottom plate 100, and then the light source distance measuring assembly 300 is disposed above the middle of the bottom plate 100, then when the light source distance meter is located at the zero position (the light beam emitted by the light source distance measuring assembly 300 is vertically downward), the light beam irradiates the middle of the bottom plate 100, and when the positioning point is selected, the contact located in the middle of the circuit board to be tested can be selected, which increases the selection range of the positioning point.

[0077] When the detection device provided in the embodiment of the present application is used, the following operations are performed:

[0078] (1) The inspector inputs a drawing of the circuit board to be tested, 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;

[0079] (2) The inspector selects a circuit board placement 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 placement seat 200;

[0080] (3) moving the circuit board placement seat 200 on which the circuit board to be tested is placed onto the base plate 100;

[0081] (4) Turn on the light source distance measuring component 300, and the light source distance measuring component 300 emits a vertical downward light beam;

[0082] (5) Selecting a contact point on the circuit board to be tested as a positioning point, and inputting the two-dimensional coordinates of the point on the circuit board to be tested into the controller;

[0083] (6) Move the circuit board placement seat 200 so that the positioning point coincides with the light spot formed on the circuit board to be tested by the light beam emitted by the light source distance measuring component 300, and the length direction of the circuit board to be tested is parallel to the first direction of the base plate 100, and the width direction of the circuit board to be tested is parallel to the second direction of the base plate 100, thereby the controller confirms the position coordinates of each contact of the circuit board to be tested on the base plate 100, and the light source distance measuring component 300 feeds back the detected distance between the light source distance measuring component 300 and the positioning point to the controller;

[0084] (7) Inputting the point to be tested, so that the controller controls the rotating assembly 400 to drive the light source detection assembly to rotate, so that the light beam emitted by the light source distance measurement assembly 300 is irradiated at the point to be tested;

[0085] (8) The inspector selects the probe corresponding to the point to be tested to inspect the light spot on the circuit board.

[0086] The circuit board signal detection device provided in the embodiment of the present application enables the detection personnel to easily detect the detection points, reducing the detection intensity of the detection personnel. The circuit board signal detection device provided in the embodiment of the present application is more suitable for the research and development detection of circuit boards and the detection of circuit boards in the production of a small number of circuit boards. Since there are many types of circuit boards in the research and development process, and the number of circuit boards produced is small, the related technology lacks a device that can be used for fast positioning detection of circuit boards of various sizes; in addition, circuit boards produced on a small scale are generally produced in limited quantities. Designing a detection device specifically for such circuit boards is time-consuming and labor-intensive and increases production costs. In the related technology, such circuit boards are usually detected by manually finding detection points, which has high detection intensity, low efficiency, and low accuracy.

[0087] In some possible embodiments of the present application, the circuit board signal detection device provided in the embodiment of the present application further includes a rotating beam 700 rotatably arranged on the column 500, the rotating beam 700 is arranged above the bottom plate 100 and below the support beam 600, and this arrangement can prevent the support beam 600 from interfering with the action of the following mechanical arm 800. The mechanical arm 800 is arranged on the rotating beam 700, and the mechanical arm 800 is connected in communication with the controller. The mechanical arm 800 is configured to grab a probe for detecting the circuit board to be tested according to the position coordinates of the point to be tested on the bottom plate 100, and move the probe to detect the circuit board to be tested. That is, in order to prevent the rotating beam 700 and the mechanical arm 800 from interfering with the light source detection assembly, when the mechanical arm 800 is not working, the rotating beam 700 rotates to the side of the bottom plate 100 to wait for work, and when the circuit board to be tested is positioned, 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 the probe for detecting the circuit board to be tested according to the position coordinates of the test point on the bottom plate 100, and moves the probe to detect the circuit board to be tested. The setting of the mechanical arm 800 further reduces the workload of the detection personnel, making the detection device more intelligent.

[0088] Furthermore, the robotic arm 800 is provided with a radar and a camera, and the robotic arm 800 uses the radar and the camera to further accurately determine the position of the point to be detected, thereby further improving the detection accuracy of the detection device.

[0089] An embodiment of the present application further provides a circuit board signal detection method, which uses the circuit board signal detection device of any of the above schemes to detect the circuit board to be tested, and the method includes:

[0090] The controller receives the drawing of the circuit board to be tested, and obtains 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;

[0091] The controller controls the light source distance measuring component to emit a laser perpendicular to the circuit board to be tested placed on the bottom plate;

[0092] The inspector or the control device adjusts the position of the circuit board placement seat so that the light beam emitted by the light source distance measuring component irradiates the positioning point on the circuit board to be tested, and 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;

[0093] 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;

[0094] The controller controls the light source distance measuring component to detect the distance between the light source distance measuring component and the positioning point;

[0095] The controller obtains the distance between the light source distance measuring component and the positioning point, and controls the rotating component to drive the light source distance measuring component to rotate according to the distance between the light source distance measuring component and the positioning point and the position coordinates of the point to be tested on the bottom plate, so that the light beam emitted by the light source distance measuring component irradiates the point to be tested;

[0096] The inspector detects the signal of the test point illuminated by the light source ranging component through the corresponding probe.

[0097] This application is intended to cover any variation, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application. The description and examples are to be regarded as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0098] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A circuit board signal detection device, characterized in that: include: Base plate; A circuit board placement seat, at least one group is provided, each group of the circuit board placement seats includes at least one circuit board placement seat, different groups of the circuit board placement seats are adapted to circuit boards to be tested of different sizes, and each group of the circuit board placement seats is configured as follows: when a circuit board to be tested adapted to one group of the circuit board placement seats is tested, one of the circuit board placement seats is selected to place the circuit board to be tested, the circuit board placement seat with the circuit board to be tested is installed on the bottom plate, and the position of the circuit board placement seat on the bottom plate is adjustable; A controller receives a drawing of the circuit board to be tested, and acquires 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 includes a pad and / or a pin; A light source distance measuring component is arranged above the bottom plate, the light source distance measuring component is communicatively connected with the controller, and the light source distance measuring component is configured as follows: when the circuit board placement seat is installed on the bottom plate, the light source distance measuring component emits a light beam perpendicular to the circuit board to be tested, and by adjusting the position of the circuit board placement seat, the length direction of the circuit board to be tested is parallel to the first direction of the bottom plate, the width direction of the circuit board to be tested is parallel to the second direction of the bottom plate, and the light beam emitted by the light source distance measuring component is irradiated at a positioning point on the circuit board to be tested, so as to determine the position coordinates of each contact of the circuit board to be tested on the bottom plate, the positioning point is any point among the contacts, and the first direction is perpendicular to the second direction; the light source distance measuring component detects the distance between the light source distance measuring component and the positioning point, and feeds the distance back to the controller; A rotating assembly is arranged above the base plate and is used to drive the light source ranging assembly to rotate. The rotating assembly is communicatively connected to the controller. The controller calculates the deflection angle of the rotating assembly according to the position coordinates of the point to be tested on the base plate and the distance between the light source ranging assembly and the positioning point, and controls the rotating assembly to drive the light source ranging assembly to rotate so that the light beam emitted by the light source ranging assembly irradiates the point to be tested, which is one of the contacts.

2. The circuit board signal detection device according to claim 1, characterized in that: The circuit board placement seat comprises a positioning portion and a placement portion arranged on the upper portion of the positioning portion, and the placement portion is used to place the circuit board to be tested; A ferromagnetic material layer is provided on the bottom plate; At least one magnet area is provided at the lower part of the positioning part, and each magnet area is provided with a magnet. When the circuit board placement seat is placed on the bottom plate, the circuit board placement seat is adsorbed on the bottom plate through the magnet; An electromagnetic shielding layer is disposed on the upper portion of the positioning portion, and the electromagnetic shielding layer is used to prevent the electromagnetic signals generated by the magnets from interfering with the circuit board to be tested placed on the placement portion.

3. The circuit board signal detection device according to claim 2, characterized in that: The positioning portion is a rectangular parallelepiped structure. 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 indicator lines and a plurality of transverse indicator strips, the plurality of longitudinal indicator strips and the plurality of transverse indicator strips are crisscrossed to form a grid structure, and each of the longitudinal indicator strips extends in the first direction, and each of the transverse indicator strips extends in the second direction.

4. The circuit board signal detection device according to claim 2, characterized in that: The placement portion includes four identical legs, each of which has a notch, and each of which has an L-shaped side wall and a bottom surface, and the four L-shaped side walls enclose each other 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 portion, the four vertex corners of the circuit board to be tested are respectively placed in the four notches, and the two side edges at each vertex corner of the circuit board to be tested are respectively attached to the L-shaped side walls at the corresponding notches.

5. The circuit board signal detection device according to claim 4, characterized in that: The placement portion further includes a plurality of pillars, which are arranged inside a rectangular structure formed by the four L-shaped side walls, and the height of each pillar is the same as the distance between the bottom surface of each notch and the upper end surface of the positioning portion.

6. The circuit board signal detection device according to claim 5, characterized in that: The number of the pillars is set to five, among which one is located at the center of the rectangular structure formed by the four L-shaped side walls, and the remaining four pillars are arranged around the center of the rectangular structure formed by the four L-shaped side walls.

7. The circuit board signal detection device according to any one of claims 1 to 6, characterized in that: The light source distance measuring component is a laser distance meter. When the circuit board to be tested is tested, the laser distance meter emits a visible laser to illuminate a positioning point on the circuit board to be tested, and simultaneously detects the distance between the light source distance measuring component and the positioning point.

8. The circuit board signal detection device according to claim 7, characterized in that: It also includes a column and a support beam arranged on the column, wherein the column is vertically arranged on the bottom plate, and the support 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 distance measuring assembly emits a light beam perpendicular to the circuit board to be tested, the light beam irradiates the middle of the bottom plate.

9. The circuit board signal detection device according to claim 8, characterized in that: It also includes a rotating beam rotatably arranged on the column, wherein the rotating beam is arranged above the bottom plate and below the supporting beam; A mechanical arm is arranged on the rotating beam, and the mechanical arm is configured to grab a probe for detecting the circuit board to be tested according to the position coordinates of the point to be tested on the bottom plate, and move the probe to detect the circuit board to be tested.

10. A circuit board signal detection method, characterized in that: The method uses the circuit board signal detection device according to any one of claims 1 to 9 to detect the circuit board to be tested, and the method comprises: The controller receives a 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 according to the drawing of the circuit board to be tested; The controller controls the light source distance measuring component to emit a laser perpendicular to the circuit board to be tested placed on the bottom plate; Adjust the position of the circuit board placement seat so that the light beam emitted by the light source distance measuring component irradiates the positioning point on the circuit board to be tested, and 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 distance measuring component to detect the distance between the light source distance measuring component and the positioning point; The controller obtains the distance between the light source distance measuring component and the positioning point, and controls the rotating component to drive the light source distance measuring component to rotate according to the distance between the light source distance measuring component and the positioning point and the position coordinates of the point to be tested on the bottom plate, so that the light beam emitted by the light source distance measuring component irradiates the point to be tested; Detect the signal of the point to be tested illuminated by the light source distance measurement component.

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