Circuit board positioning method and device

Abstract

The invention belongs to the technical field of satellite equipment, and particularly relates to a circuit board positioning method and device.The circuit board positioning method is applied to the circuit board positioning device.A positioning assembly in the circuit board positioning device comprises a wedge block and a linear driver, and the inclined face of the wedge block inclines towards the side wall of a frame from top to bottom; the method comprises the following steps: acquiring an inclined surface inclination angle of a wedge-shaped block, a distance value between a lower end vertex angle of the wedge-shaped block and the top of a frame side wall in an initial state, a target gap value between the frame side wall and a circuit board, and a distance value between the top of the frame and the circuit board; calculating a target displacement value of the wedge block; and controlling the linear driver to drive the wedge-shaped block to move downwards from the initial state until the displacement amount of the wedge-shaped block reaches the target displacement value. According to the circuit board positioning method and device provided by the invention, the circuit board can be automatically and accurately pushed to a correct position, the repair probability is greatly reduced, the frequency of performing various performance tests is reduced, and time and labor are saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of satellite equipment, and in particular relates to a circuit board positioning method and device. Background Art

[0002] The satellite has a signal processing device inside to receive, process and send signals. The signal processing device includes a frame and a circuit board installed in the frame. In order to make the circuit board fit smoothly into the frame, the frame is generally made larger, which results in a certain gap between the circuit board and the frame, generally 0.2~0.5mm. The existence of the gap causes the position error of the circuit board, which in turn causes the board connector ( Figure 1 The diagram shows the mating assembly structure of two inter-board connectors (model HRM). Pinholes often cannot be precisely mated, and the external connector connected to the circuit board cannot be installed in the corresponding position on the frame. As a result, it is necessary to repair and re-test various performance tests, which is time-consuming and labor-intensive, affecting the project schedule. Summary of the Invention

[0003] In view of this, the present invention aims to propose a circuit board positioning method and device to solve the problem that the gap between the circuit board and the frame causes the circuit board to have a position error, which in turn causes the inter-board connectors connecting the two circuit boards to often be unable to be plugged in, and the external connector connected to the circuit board cannot be installed in the corresponding position of the frame, and ultimately needs to be repaired and various performance tests need to be repeated, which is time-consuming and labor-intensive and affects the project progress.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows: The present invention provides a circuit board positioning method, which is applied to a circuit board positioning device. The circuit board positioning device includes a positioning assembly for being mounted on the top of a frame side wall. The positioning assembly includes a wedge block and a linear drive. The inclined surface of the wedge block is inclined from top to bottom toward the frame side wall. The linear drive is used to drive the wedge block to move downward along the frame side wall.

[0005] The method comprises: Obtaining the inclined angle α of the wedge block, the distance d0 between the lower end vertex of the wedge block and the top of the frame side wall in the initial state, the target gap d1 between the frame side wall and the circuit board, and the distance d2 between the top of the frame and the circuit board; The target displacement value of the wedge block is calculated according to the following formula: s=d2+d1*tanα-d0; The linear actuator is controlled to drive the wedge block to move downward from the initial state until the displacement of the wedge block reaches the target displacement value s.

[0006] Furthermore, the method further comprises: On the control panel, input the inclination angle α of the wedge block, the distance value d0 between the lower end corner of the wedge block and the top of the frame side wall in the initial state, the target gap value d1 between the frame side wall and the circuit board, and the distance value d2 between the top of the frame and the circuit board.

[0007] Furthermore, the control panel is provided on a mobile phone, a computer or a tablet.

[0008] Furthermore, the positioning assembly also includes a displacement sensor, which is used to sense the displacement of the wedge block.

[0009] The method further comprises: During the downward movement of the wedge block, an actual displacement value of the wedge block sensed by the displacement sensor is acquired in real time; When the actual displacement value reaches the target displacement value, the linear actuator is controlled to stop operating.

[0010] Furthermore, the working end of the linear actuator abuts against the top end of the wedge block, and the positioning assembly also includes a reset structure, which is used to provide an upward reset force for the wedge block; the working end of the linear actuator is installed with a pressure sensor.

[0011] The method further comprises: During the downward movement of the wedge block, an actual pressure value sensed by the pressure sensor is acquired in real time; When the actual pressure value exceeds the pressure threshold, the linear actuator is controlled to stop operating.

[0012] Furthermore, the method further comprises: When the actual pressure value exceeds the pressure threshold, the alarm is controlled to sound an alarm.

[0013] The circuit board positioning device provided by the present invention includes a controller, which includes at least one processor and at least one memory. The memory stores a computer program, and when the computer program is executed by the processor, the above-mentioned circuit board positioning method is implemented.

[0014] Furthermore, the positioning assembly also includes an adjustment seat, the adjustment seat is provided with a sliding hole parallel to the side wall of the frame, the wedge block is provided with a sliding rod, and the sliding rod slides in cooperation with the sliding hole; the end of the sliding rod is provided with a limit block, and the outer end of the sliding hole is installed with a blocking block, and a return spring is provided on the sliding rod, and the two ends of the return spring are elastically abutted against the limit block and the blocking block respectively.

[0015] Furthermore, the positioning assembly also includes a fixing seat and a preload spring, and the fixing seat is used to be detachably connected to the top of the frame side wall.

[0016] The fixing seat is provided with an adjustment track perpendicular to the side wall of the frame, the adjustment seat is slidably engaged with the adjustment track, the pre-tightening spring is provided in the adjustment track, and the two ends of the pre-tightening spring are respectively connected to the fixing seat and the adjustment seat, for applying a pre-tightening force to the adjustment seat toward the side wall of the frame.

[0017] Furthermore, an extension plate is provided on the top of the fixing seat, and the extension plate is provided with at least two fixing holes, each of which is used to be fastened to a plurality of threaded holes on the top of the frame side wall by screws.

[0018] Compared with the prior art, the circuit board positioning method and device of the present invention have the following advantages: The circuit board positioning method provided by the present invention can control the linear actuator to automatically move the wedge block to the appropriate position based on the pre-acquired inclined angle α of the wedge block, the distance value d0 between the lower end top angle of the wedge block and the top of the frame side wall in the initial state, the target gap value d1 between the frame side wall and the circuit board, and the distance value d2 between the top of the frame side wall and the circuit board. The wedge block is used to accurately push the circuit board to the correct position, thereby enabling the inter-board connector connecting the two circuit boards to be smoothly plugged in, and the external connector connected to the circuit board to be smoothly installed in the corresponding position of the structural frame. This can greatly reduce the probability of rework and the number of various performance tests, saving time and effort, and helping to accelerate project progress. It should be noted that when using the same circuit board positioning device to position circuit boards in the same batch of products, it is only necessary to determine the specific values of α, d0, d1 and d2 by measurement or other means before positioning the circuit boards in the first group of products, and then directly use the same values, which is very efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] In the attached figure: Figure 1 It is a plug-in assembly structure of two inter-board connectors of model HRM in the related art; Figure 2 A schematic diagram of the installation structure of a circuit board positioning device provided by an embodiment of the present invention; Figure 3 A schematic diagram of the exploded structure of a circuit board positioning device provided by an embodiment of the present invention; Figure 4A schematic cross-sectional view of the linear actuator of the circuit board positioning device provided by an embodiment of the present invention; Figure 5 A schematic cross-sectional view of the positioning assembly in the circuit board positioning device provided by an embodiment of the present invention in an initial state; Figure 6 A schematic cross-sectional view of the slide bar of the circuit board positioning device provided by an embodiment of the present invention; Figure 7 A schematic flow chart of a circuit board positioning method provided in an embodiment of the present invention.

[0021] Description of reference numerals: 100 - positioning assembly; 110 - wedge block; 111 - slide bar; 112 - limit block; 120 - linear actuator; 130 - non-contact displacement sensor; 140 - pressure sensor; 150 - return spring; 160 - indicator light; 170 - adjustment seat; 171 - slide hole; 172 - stop block; 180 - preload spring; 190 - fixed seat; 191 - adjustment track; 192 - extension plate; 193 - fixing hole; 200-frame side wall; 300-Circuit Board. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0026] Figure 2-Figure 6A schematic structural diagram of a circuit board positioning device is provided for an embodiment of the present invention, wherein the device includes a positioning assembly 100 for being mounted to the top of a frame side wall 200, the positioning assembly 100 including a wedge block 110 and a linear actuator 120, the inclined surface of the wedge block 110 being arranged to tilt from top to bottom toward the frame side wall 200, the linear actuator 120 being able to drive the wedge block 110 to move downward along the frame side wall 200 so that the top corner end of the wedge block 110 is inserted into the gap between the circuit board 300 and the frame side wall 200, and being able to push the circuit board 300 to move in a direction away from the corresponding frame side wall 200, thereby increasing the gap between the circuit board 300 and the frame side wall 200, and controlling the linear actuator 120 to stop when the requirement is met.

[0027] like Figure 2 As shown, the positioning components 100 are divided into several groups, which are respectively installed on the top of the four side walls of the frame.

[0028] The linear drive 120 may be a linear motor. The inclined angle of the wedge block 110 (ie, the angle between the inclined surface and the frame side wall 200 ) is preferably 20° to 30°.

[0029] In the specific structure of the positioning assembly 100, an adjustment seat 170 may also be provided. A sliding hole 171 parallel to the frame side wall 200 is provided on the adjustment seat 170. A sliding rod 111 is provided on the wedge block 110, and the sliding rod 111 is slidably engaged with the sliding hole 171. A limit block 112 is provided at the end of the sliding rod 111, and a blocking block 172 is installed at the outer end of the sliding hole 171. A return spring 150 is sleeved on the sliding rod 111, so that the two ends of the return spring 150 elastically abut against the limit block 112 and the blocking block 172, respectively. In this way, the return spring 150 can continuously apply a return force in the direction to the limit block 112. Once the working end of the linear actuator 120 moves upward, the limit block 112 will drive the wedge block 110 upward under the push of the return spring 150. After the linear actuator 120 is reset, the wedge block 110 can also be reset accordingly. The limiting block 112 , the blocking block 172 and the return spring 150 can form a return structure.

[0030] The positioning assembly 100 may further include a fixing seat 190 and a pre-tightening spring 180. The fixing seat 190 is detachably connected to the top of the frame side wall 200, so that the positioning assembly 100 can be smoothly installed on the top of the frame side wall 200. An adjustment track 191 perpendicular to the frame side wall 200 may be provided on the fixing seat 190. The adjustment seat 170 is slidably engaged with the adjustment track 191. The pre-tightening spring 180 is placed in the adjustment track 191, and the two ends of the pre-tightening spring 180 are respectively connected to the fixing seat 190 and the adjustment seat 170, so that the pre-tightening spring 180 can apply a pre-tightening force toward the frame side wall 200 to the adjustment seat 170. During installation, the adjustment seat 170 can be pulled to compress the preload spring 180, so that the adjustment seat 170 and the wedge block 110 can avoid the frame side wall 200, so that the fixing seat 190 can be smoothly installed on the top of the frame side wall 200; after the installation is completed, the adjustment seat 170 is released, and under the elastic reset force of the preload spring 180, the adjustment seat 170 will drive the wedge block 110 to move toward the frame side wall 200, so that the wedge block 110 can be smoothly fitted with the frame side wall 200, and in the process of the wedge block 110 moving downward, the fitting effect of the wedge block 110 and the frame side wall 200 can be maintained, thereby ensuring the positioning effect of the circuit board 300; in addition, it can also adapt to different products to ensure the fitting effect of the wedge block 110 and the frame side wall 200.

[0031] Specifically, see Figure 3 and Figure 5 An extension plate 192 can be set on the top of the fixing seat 190, and at least two fixing holes 193 are set on the extension plate 192. Each fixing hole 193 is used to be fixed with several threaded holes on the top of the frame side wall 200 by screw locking, thereby achieving detachability and better fixing reliability without damaging the original structure of the frame.

[0032] The circuit board positioning device in this embodiment has a controller, which includes at least one processor and at least one memory. The memory stores a computer program, and when the computer program is executed by the processor, it implements the circuit board positioning method in any of the following embodiments.

[0033] Specifically, the controller can select a wired connection or a wireless connection with the terminal device. The wireless connection mode can be selected as a WIFI connection, a Bluetooth connection, etc.

[0034] Figure 7 A schematic flow chart of a circuit board positioning method provided in one embodiment of the present invention, which can be applied to the circuit board positioning device of any of the above embodiments, includes: S102 , obtaining the inclined angle α of the wedge block 110 , the distance d0 between the lower vertex angle of the wedge block 110 and the top of the frame side wall 200 in the initial state, the target gap d1 between the frame side wall 200 and the circuit board 300 , and the distance d2 between the top of the frame side wall 200 and the circuit board 300 ; α can be adjusted based on the actual shape of the wedge block 110 to accommodate wedge blocks 110 of varying shapes. d0 can be adjusted based on the specific structure of the circuit board positioning device to accommodate circuit board positioning devices of varying structures and sizes. Of course, for the same circuit board positioning device, α and d0 are fixed values and do not require repeated measurement. d1 and d2 can be adjusted based on the specific structure and relative position of the frame sidewall 200 and circuit board 300 to accommodate different models of frame sidewalls 200 and circuit boards 300. That is, for the same batch of frame sidewalls 200 and circuit boards 300, d1 and d2 are fixed values and do not require repeated measurement.

[0035] S104, calculating the target displacement value of the wedge block 110 according to the following formula: s=d2+d1*tanα-d0; S106 , controlling the linear actuator 120 to drive the wedge block 110 to move downward from the initial state until the displacement of the wedge block 110 reaches the target displacement value s.

[0036] Therefore, the circuit board positioning method provided in this embodiment can control the linear actuator 120 to automatically move the wedge block 110 to the appropriate position based solely on the previously acquired known values (α, d0, d1, and d2). The wedge block 110 can then precisely push the circuit board 300 to the correct position. This allows the inter-board connectors connecting the two circuit boards 300 to be smoothly plugged together, and the external connectors connected to the circuit boards 300 to be smoothly installed in corresponding positions on the structural frame. This significantly reduces the likelihood of rework and the number of performance tests, saving time and effort and facilitating accelerated project progress. It should be noted that when using the same circuit board positioning device to position circuit boards 300 in the same batch of products, the specific values of α, d0, d1, and d2 only need to be determined by measurement or other means before positioning the circuit boards 300 in the first batch of products. The same values can then be used directly for subsequent positioning, resulting in high efficiency.

[0037] Take the J30J connector, commonly used in satellite products, as an example. This connector is a high-speed signal transmission connector with pins soldered to a circuit board 300. To ensure uncompromising connector performance while also ensuring effective electromagnetic shielding, the design often requires a mating accuracy of less than 0.05mm between the connector and the structure. This accuracy can easily cause interference between the connector and the structure using traditional assembly methods. The present invention achieves a mating accuracy of 0.02mm between the connector and the frame, effectively meeting these requirements.

[0038] The method provided in this embodiment may further include the following steps: inputting, on the control panel, the inclined angle α of the wedge block 110, the distance d0 between the lower corner of the wedge block 110 and the top of the frame side wall 200 in the initial state, the target gap d1 between the frame side wall 200 and the circuit board 300, and the distance d2 between the top of the frame side wall 200 and the circuit board 300. This operation is convenient and allows for easy value changes.

[0039] The control panel can be installed on a mobile phone, computer, tablet or other terminal device.

[0040] The positioning assembly 100 may further include a displacement sensor to sense the displacement of the wedge block 110. The displacement sensor may be a contact displacement sensor or a non-contact displacement sensor 130, such as a digital laser displacement sensor, which may be mounted on the bottom of the adjustment seat 170.

[0041] The method provided in this embodiment may further include the following steps: During the downward movement of the wedge block 110, the actual displacement value of the wedge block 110, as sensed by the displacement sensor, is acquired in real time; when the actual displacement value reaches the target displacement value, the linear actuator 120 is controlled to stop. This achieves a closed-loop control effect, allowing the wedge block 110 to more accurately stop at the target position, further improving the positioning accuracy of the circuit board 300.

[0042] Preferably, the working end of the linear actuator 120 can be brought into contact with the top end of the wedge block 110, enabling the linear actuator 120 to push the wedge block 110. A reset structure can also be provided to provide an upward reset force to the wedge block 110, so that when the linear actuator 120 is reset, the wedge block 110 can be reset synchronously under the action of the reset structure. Furthermore, a pressure sensor 140 is installed at the working end of the linear actuator 120 to sense the pressure between the wedge block 110 and the working end of the linear actuator 120.

[0043] The method provided in this embodiment may further include the following steps: in the process of the wedge block 110 moving downward, the actual pressure value sensed by the pressure sensor 140 is obtained in real time; when the actual pressure value exceeds the pressure threshold, it indicates that the pressure between the wedge block 110 and the working end of the linear actuator 120 is too large, that is, the pressure between the wedge block 110 and the working end of the linear actuator 120 is too large. At this time, the linear actuator 120 is controlled to stop running so that the linear actuator 120 no longer drives the wedge block 110 to move downward, thereby preventing the circuit board 300 from being crushed due to further increase in the pressure between the wedge block 110 and the circuit board 300, thereby achieving the effect of protecting the circuit board 300 under abnormal circumstances and avoiding unnecessary losses.

[0044] Furthermore, the method provided in this embodiment may further include the following steps: when the actual pressure value sensed by the pressure sensor 140 exceeds the pressure threshold, controlling an alarm to sound an alarm, thereby promptly notifying the user to handle the abnormal fault and ensuring efficiency. Specifically, the alarm may be an indicator light 160 or a buzzer.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A circuit board positioning method, characterized in that: Applicable to a circuit board positioning device, the circuit board positioning device includes a positioning assembly for mounting on the top of a frame side wall, the positioning assembly includes a wedge block and a linear actuator, the inclined surface of the wedge block is inclined from top to bottom toward the frame side wall, and the linear actuator is used to drive the wedge block to move downward along the frame side wall; The method comprises: Obtaining the inclined angle α of the wedge block, the distance d0 between the lower end vertex of the wedge block and the top of the frame side wall in the initial state, the target gap d1 between the frame side wall and the circuit board, and the distance d2 between the top of the frame and the circuit board; The target displacement value of the wedge block is calculated according to the following formula: s=d2+d1*tanα-d0; The linear actuator is controlled to drive the wedge block to move downward from the initial state until the displacement of the wedge block reaches the target displacement value s.

2. The circuit board positioning method according to claim 1, wherein: The method further comprises: On the control panel, input the inclination angle α of the wedge block, the distance value d0 between the lower end corner of the wedge block and the top of the frame side wall in the initial state, the target gap value d1 between the frame side wall and the circuit board, and the distance value d2 between the top of the frame and the circuit board.

3. The circuit board positioning method according to claim 2, wherein: The control panel is arranged on a mobile phone, a computer or a tablet.

4. The circuit board positioning method according to claim 1, wherein: The positioning assembly further includes a displacement sensor, which is used to sense the displacement of the wedge block; The method further comprises: During the downward movement of the wedge block, an actual displacement value of the wedge block sensed by the displacement sensor is acquired in real time; When the actual displacement value reaches the target displacement value, the linear actuator is controlled to stop operating.

5. The circuit board positioning method according to any one of claims 1 to 4, characterized in that: The working end of the linear actuator abuts against the top end of the wedge block, and the positioning assembly further includes a reset structure, which is used to provide an upward reset force for the wedge block; A pressure sensor is installed at the working end of the linear actuator; The method further comprises: During the downward movement of the wedge block, an actual pressure value sensed by the pressure sensor is acquired in real time; When the actual pressure value exceeds the pressure threshold, the linear actuator is controlled to stop operating.

6. The circuit board positioning method according to claim 5, characterized in that: The method further comprises: When the actual pressure value exceeds the pressure threshold, the alarm is controlled to sound an alarm.

7. A circuit board positioning device, characterized in that: The circuit board positioning method comprises a controller, the controller comprises at least one processor and at least one memory, the memory stores a computer program, and when the computer program is executed by the processor, the circuit board positioning method according to any one of claims 1 to 6 is implemented.

8. The circuit board positioning device according to claim 7, characterized in that: The positioning assembly also includes an adjustment seat, which is provided with a sliding hole parallel to the side wall of the frame, and the wedge block is provided with a sliding rod, which slides in cooperation with the sliding hole; a limit block is provided at the end of the sliding rod, and a blocking block is installed at the outer end of the sliding hole; a return spring is sleeved on the sliding rod, and the two ends of the return spring are elastically in contact with the limit block and the blocking block respectively.

9. The circuit board positioning device according to claim 8, characterized in that: The positioning assembly further includes a fixing seat and a preload spring, wherein the fixing seat is used to be detachably connected to the top of the frame side wall; The fixing seat is provided with an adjustment track perpendicular to the side wall of the frame, the adjustment seat is slidably engaged with the adjustment track, the pre-tightening spring is provided in the adjustment track, and the two ends of the pre-tightening spring are respectively connected to the fixing seat and the adjustment seat, for applying a pre-tightening force to the adjustment seat toward the side wall of the frame.

10. The circuit board positioning device according to claim 9, characterized in that: An extension plate is provided on the top of the fixing seat, and the extension plate is provided with at least two fixing holes. Each of the fixing holes is used to be fastened to a plurality of threaded holes on the top of the frame side wall by screws.

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