Batch calibration device for inertial measurement units

Abstract

The utility model relates to the field of calibration equipment, and provides a batch calibration device for inertial measurement units, the batch calibration device comprises tool assemblies and supporting blocks, the tool assemblies are arranged at intervals in a layered manner in the vertical direction through the supporting blocks, and each tool assembly comprises a press-fitting plate, a circuit board and a bottom plate; a plurality of placing grooves are formed in the bottom plate, the circuit board is fixedly mounted above the bottom plate and is suitable for being in signal connection with the positioning inertial measurement units, through holes corresponding to the placing grooves in position are formed in the circuit board, and the press-fitting plate is fixedly mounted above the circuit board and clamps the inertial measurement units between the press-fitting plate and the bottom plate. The inertial measurement units to be calibrated can pass through the through holes of the circuit board in batches in advance and then are placed in the placement grooves of the bottom plate, and then unified pressing and fixing are implemented through the pressing plate, so that synchronous and stable clamping and calibration environment construction of a plurality of inertial measurement units are realized at one stroke, the efficiency shackle of one-by-one manual clamping is fundamentally overcome, and the calibration efficiency of the inertial measurement units is improved. And the production efficiency and the automation level of the calibration link are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of calibration equipment, and further relates to a batch calibration device for inertial measurement units. Background Art

[0002] The calibration of the inertial measurement unit (IMU 3 module) is a key link to ensure its accuracy. The traditional IMU calibration device has a significant efficiency bottleneck. When in use, the IMU sensors to be calibrated need to be manually aligned and installed one by one to the specific position of the calibration plate. Then the cables or interfaces need to be manually connected. After the calibration is completed, the same tedious disassembly process needs to be performed in reverse. The operation mode is highly dependent on manual labor, the disassembly and assembly process is time-consuming and highly repetitive, which seriously restricts the calibration throughput and makes it difficult to meet the needs of mass production. It is completely unable to adapt to the rigid demand of modern production lines for large-scale IMU calibration. With the expansion of application scenarios and the increase in production scale, there is an urgent need for an efficient and reliable batch calibration method. Utility Model Content

[0003] In response to the above technical problems, the purpose of the present utility model is to provide a batch calibration device for inertial measurement units. The inertial measurement units to be calibrated can be pre-placed in batches through the through holes of the circuit board and placed in the placement grooves of the base plate, and then uniformly pressed and fixed by a press-fit plate, thereby achieving the synchronous and stable clamping and calibration environment construction of multiple inertial measurement units in one fell swoop, fundamentally overcoming the efficiency constraints of manual clamping one by one, greatly improving the production efficiency and automation level of the calibration link, and providing strong support for large-scale production.

[0004] In order to achieve the above-mentioned object, the present invention provides a batch calibration device for an inertial measurement unit, comprising a tooling assembly and a support block, wherein the tooling assembly is arranged in layers and intervals along the vertical direction through the support block, and each tooling assembly comprises a press-fit plate, a circuit board, and a base plate;

[0005] The base plate is provided with a plurality of placement slots for positioning the inertial measurement units. The circuit board is fixedly mounted above the base plate and is suitable for signal connection with the positioning inertial measurement units. The circuit board is provided with through holes corresponding to the positions of the placement slots. The press-fit plate is suitable for being fixedly mounted above the circuit board and clamping the plurality of inertial measurement units between the press-fit plate and the base plate.

[0006] The support blocks are arranged on both sides of the base plate, and the support blocks connect the adjacent upper and lower base plates so that the plurality of tooling components maintain a set layer spacing.

[0007] In some embodiments, the opening size of the through hole is larger than the outline size of the placement groove, so that a gap is maintained between the inertial measurement unit and the through hole of the circuit board; the press-fit plate and the circuit board are both fixed to the base plate by positioning pins.

[0008] In some embodiments, the press-fit plate is further provided with a plurality of positioning guide pillars, and the base plate is correspondingly provided with positioning holes, and the positioning guide pillars are suitable for passing through the press-fit plate and the circuit board and being inserted into the positioning holes of the base plate.

[0009] In some embodiments, a plurality of receiving grooves are further provided on the bottom of the press-fit plate, and the receiving grooves correspond to the placement grooves on the bottom plate and are used to receive the top of the inertial measurement unit.

[0010] In some embodiments, a pair of the pressing plates are arranged in parallel and spaced apart above the circuit board, and each of the pressing plates is further provided with a pair of lifting portions at both ends perpendicular to the spacing direction thereof.

[0011] In some embodiments, support blocks are further provided on both sides of the base plate, and the support blocks connect the adjacent upper and lower base plates so that the plurality of tooling components maintain a set layer spacing.

[0012] In some embodiments, both ends of the support block are provided with first fixing holes in the vertical direction, and the first fixing holes are fastened vertically to the base plate through fixing members;

[0013] A snap-fit ​​groove is provided on the side of the bottom plate, and a snap-fit ​​portion is provided on the top of the support block, wherein the snap-fit ​​portion is adapted to be embedded in the snap-fit ​​groove of the adjacent upper bottom plate;

[0014] A second fixing hole is provided on the side surface of the clamping portion, and the second fixing hole is fastened horizontally to the bottom of the clamping slot through a fixing piece.

[0015] In some embodiments, a ventilation groove is further provided at the bottom of the support block, and the ventilation groove matches the clamping groove to assist in heat dissipation.

[0016] In some embodiments, the clamping parts are provided on the top and bottom of the support block located at the bottom, and the two clamping parts are used to clamp the upper and lower adjacent bottom plates.

[0017] In some embodiments, the inertial measurement unit is provided with a male connector, and the placement slot is further provided with a communication adapter board, on which a female connector matching the male connector is integrated, and the communication adapter board is connected to the circuit board via a flexible cable;

[0018] Alternatively, a specific test point is provided on the inertial measurement unit, a communication adapter board is provided on the press-fit plate, a probe is provided on the communication adapter board, the probe corresponds to the position of the test point, and the communication adapter board is connected to the circuit board via a flexible cable.

[0019] Compared with the prior art, the batch calibration device for inertial measurement units provided by the present invention has at least one of the following beneficial effects:

[0020] 1. The inertial measurement units to be calibrated can be pre-assembled in batches through the through-holes of the circuit board and placed in the placement slots of the base plate. They are then uniformly clamped and fixed using a press-fit plate. This achieves the simultaneous and stable clamping and calibration environment construction of multiple inertial measurement units, fundamentally overcoming the efficiency constraints of manual clamping one by one, greatly improving the production efficiency and automation level of the calibration process, and providing strong support for large-scale production.

[0021] 2. The base plate is provided with corresponding positioning holes, and the positions of the positioning holes correspond precisely to the positioning guide pins, so that the positioning guide pins can be smoothly passed through the press-fit plate and the circuit board, and accurately inserted into the positioning holes of the base plate. This not only improves the alignment accuracy between the press-fit plate and the base plate, but also enhances the stability and reliability of the entire device.

[0022] 3. When the IMU is placed in the placement slot of the base plate, the slot can just accommodate the top of the IMU, ensuring that the module is accurately positioned and firmly supported in the vertical direction. This not only improves the stability of the IMU during the calibration process, but also effectively avoids calibration errors caused by module position offset.

[0023] 4. The support blocks connect the adjacent upper and lower base plates, allowing multiple tooling components to be stably stacked according to the predetermined layer spacing to form a multi-layer calibration device. This not only improves space utilization, but also ensures the independence and stability of each tooling component during the calibration process, and achieves parallelism between calibration devices on different layers.

[0024] 5. The top and bottom of the support block at the bottom are provided with a clamping part, so that the support block can be stably connected to the upper and lower base plates at the same time; the bottoms of the remaining support blocks are also provided with ventilation grooves, which allow air to circulate between layers, forming an effective heat dissipation channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0026] Figure 1 This is the overall diagram of the inertial measurement unit batch calibration device;

[0027] Figure 2 It is an exploded view of the tooling assembly;

[0028] Figure 3 It is an enlarged view of the tooling assembly;

[0029] Figure 4 It is a structural diagram of the support block.

[0030] Description of Figure Numbers:

[0031] Tooling assembly 1, pressing plate 11, probe 111, positioning guide pin 112, lifting portion 113, circuit board 12, through hole 121, bottom plate 13, placement groove 131, clamping groove 132, flexible cable 14, cable clamp 141, support block 2, second fixing hole 21, clamping portion 22, ventilation groove 221, inertial measurement unit 3. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0033] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0034] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0035] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0036] In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the present utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be considered as the scope of protection of the present utility model.

[0037] refer to Figures 1 to 3 The utility model provides a batch calibration device for an inertial measurement unit 3, comprising a tooling assembly 1 and a support block 2. The tooling assembly 1 is arranged in layers and intervals in the vertical direction through the support block 2. Each tooling assembly 1 comprises a pressing plate 11, a circuit board 12 and a base plate 13; the base plate 13 is provided with a plurality of placement grooves 131 for positioning the inertial measurement unit 3, the circuit board 12 is fixedly mounted above the base plate 13 and is suitable for signal connection and positioning of the inertial measurement unit 3, the circuit board 12 is provided with a through hole 121 corresponding to the position of the placement groove 131, the pressing plate 11 is suitable for being fixedly mounted above the circuit board 12 and clamping a plurality of inertial measurement units 3 between the pressing plate 11 and the base plate 13; the support blocks 2 are arranged on both sides of the base plate 13, and the support blocks 2 connect the adjacent upper and lower base plates 13 so that the plurality of tooling assemblies 1 maintain the set layer spacing.

[0038] In this embodiment, the inertial measurement units 3 to be calibrated can be pre-placed in batches through the through holes 121 of the circuit board 12 and placed in the placement grooves 131 of the base plate 13, and then uniformly pressed and fixed by the press-fit plate 11, thereby achieving the synchronous and stable clamping and calibration environment construction of multiple inertial measurement units 3 in one fell swoop, fundamentally overcoming the efficiency constraints of manual clamping one by one, greatly improving the production efficiency and automation level of the calibration link, and providing strong support for large-scale production.

[0039] Specifically, the batch calibration device for inertial measurement units 3 is intended to effectively improve the efficiency and automation of the calibration process of inertial measurement units 3 and meet the needs of large-scale production. The calibration device includes a plurality of tooling components 1 arranged in layers along the vertical direction. These tooling components 1 are arranged in a layered and equidistant layout in the vertical direction. Each tooling component 1 is mainly composed of a press plate 11, a circuit board 12 and a base plate 13. Among them, the base plate 13 is provided with a number of placement grooves 131 for accurately positioning the inertial measurement unit 3. The size and shape of these placement grooves 131 strictly match the shape of the inertial measurement unit 3 to ensure that the inertial measurement unit 3 is placed firmly. The circuit board 12 is firmly fixed and installed directly above the base plate 13, and a through hole 121 corresponding to the position of the placement groove 131 is precisely opened on the circuit board 12, which facilitates the pre-assembly of the inertial measurement unit 3, that is, after the inertial measurement unit 3 passes through the through hole 121, the bottom of the inertial measurement unit 3 is placed in the placement groove 131. The circuit board 12 is fixedly mounted above the base plate 13 and is suitable for signal connection to the positioning inertial measurement unit 3. The circuit board 12 is then uniformly connected to the external data terminal, so that the relevant status information of the module can be monitored and fed back in real time, providing electrical data support for the precise control of the calibration process. The electrical connection method preferably uses a soft cable 14 and is fixed by a cable clamp 141. Of course, other electrical connection methods can also be used. This application will not be further described here, and the technical personnel of this application can choose on their own. The signal connection between the circuit board 12 and the inertial measurement unit 3 can be achieved by connector plug-in and probe contact.

[0040] Connector mating involves integrating a male connector into the IMU 3, placing a communication adapter board within slot 131, and integrating a matching female connector onto the communication adapter board. The female connector or communication adapter board then connects to the circuit board 12 via a flexible flat cable 14. During use, the IMU 3 is positioned within slot 131 of the base plate 13. One end of the flexible flat cable 14 is pre-connected (typically by soldering or crimping) to the female connector on the communication adapter board. As the press plate 11 presses down to secure the IMU 3, the free end of the flexible flat cable 14 (with the male connector) moves with it. The male connector on the IMU 3 and the free end of the flexible flat cable 14 precisely mate.

[0041] Probe contact does not utilize a dedicated connector integrated into the IMU 3. Instead, specific test points are provided on the IMU 3. These test points can be located on the IMU 3's own circuit board and are typically metal pads. A communication adapter board is mounted on the press-fit plate 11, and probes 111 are installed on the communication adapter board. The number and location of probes 111 correspond to the test points on the IMU 3. The IMU 3 is positioned in the placement slot 131 of the base plate 13, and one end of the flexible flat cable 14 is connected to the circuit board on the communication adapter board. When the press-fit plate 11 is pressed downward to secure the IMU 3, the probes 111 mounted on the press-fit plate 11 or the communication adapter board are pressed toward the IMU 3. The tips of the probes 111 directly contact and press against the corresponding test points on the IMU 3, forming an electrical connection. It is worth noting that signal connection between the IMU 3 and the circuit board 12 is conventional technology and will not be further described in this application. The circuit board 12 is only used as a signal transfer and has no direct contact with the inertial measurement unit 3. The circuit boards 12 of each tooling assembly 1 are then uniformly connected to the data terminal of the external test module.

[0042] The press-fit plate 11 can be adaptively fixedly installed above the circuit board 12, and by applying uniform pressure, multiple inertial measurement units 3 are tightly clamped between the press-fit plate 11 and the base plate 13, forming a stable and reliable clamping state, providing a stable physical environment for the calibration process.

[0043] Support blocks 2 are positioned on either side of the base plate 13 and relatively between adjacent tooling assemblies 1, connecting and maintaining the predetermined interlayer spacing between each layer of tooling assemblies 1. Specifically, support blocks 2 securely connect the adjacent upper and lower base plates 13, enabling multiple tooling assemblies 1 to be stably stacked at predetermined interlayer spacing to form a multi-layer calibration device. This not only improves space utilization but also ensures the independence and stability of each tooling assembly 1 during the calibration process, achieving parallelism between calibration devices on different layers.

[0044] During use, the inertial measurement units 3 to be calibrated can be pre-placed in batches through the through holes 121 of the circuit board 12 and accurately placed in the placement grooves 131 of the base plate 13. Subsequently, a uniform and even pressing and fixing action is implemented with the help of the pressing plate 11. This achieves the synchronous and stable clamping of multiple inertial measurement units 3 in one fell swoop, and at the same time builds a highly consistent calibration environment. This fundamentally and thoroughly overcomes the low efficiency problem brought about by traditional manual clamping one by one, greatly improving the overall production efficiency and automation level of the calibration process, providing solid and powerful technical support for modern large-scale production, and effectively ensuring the stability of production progress and product quality.

[0045] It is worth noting that the opening size of the through hole 121 is larger than the outline size of the placement groove 131, so that a gap is maintained between the inertial measurement unit 3 and the through hole 121 of the circuit board 12. This gap ensures that the inertial measurement unit 3 always maintains a certain gap with the circuit board 12 when passing through the through hole 121 and being placed in the placement groove 131. This not only ensures that the inertial measurement unit 3 can smoothly pass through the through hole 121 and be accurately placed in the placement groove 131, but also provides appropriate adjustment space for the inertial measurement unit 3 in the subsequent pressing and fixing process, which helps to achieve more accurate positioning and clamping. In addition, the pressing plate 11 and the circuit board 12 are both fixed to the base plate 13 by locating pins. The use of locating pins not only ensures the precise alignment between the pressing plate 11, the circuit board 12 and the base plate 13, but also enhances the structural stability of the entire tooling assembly 1, avoids component displacement due to external force or vibration during the calibration process, and thus ensures the accuracy and reliability of the calibration data.

[0046] Furthermore, the press-fit plate 11 is provided with a plurality of positioning guide posts 112 , and the bottom plate 13 is provided with corresponding positioning holes. The positioning guide posts 112 are adapted to penetrate the press-fit plate 11 and the circuit board 12 and be inserted into the positioning holes of the bottom plate 13 .

[0047] In this embodiment, the bottom plate 13 is provided with corresponding positioning holes, and the positions of the positioning holes correspond precisely to the positioning guide posts 112, so that the positioning guide posts 112 can be smoothly inserted into the press-fit plate 11 and the circuit board 12, and accurately inserted into the positioning holes of the bottom plate 13. This not only improves the alignment accuracy between the press-fit plate 11 and the bottom plate 13, but also enhances the stability and reliability of the entire device. The flexible cable 14 connects the inertial measurement unit 3 and the circuit board.

[0048] Specifically, during the installation process, the cooperation between the positioning guide post 112 and the positioning hole can guide the press plate 11 to be accurately positioned, avoiding the errors that may be caused by manual alignment. At the same time, this structure can also withstand a certain lateral force, preventing displacement between the press plate 11 and the base plate 13 due to external forces during the calibration process, thereby ensuring the stable clamping of the inertial measurement unit 3 during the calibration process. In addition, the provision of the positioning guide post 112 also helps to improve the reusability and interchangeability of the device. When a tooling component 1 needs to be replaced or maintained, the provision of the positioning guide post 112 and the positioning hole can ensure that the new component can be quickly and accurately installed in place, reducing the time for adjustment and calibration, and further improving production efficiency. In the structure of the multi-layer tooling component 1, the press plate 11 and the base plate 13 of each layer are fixed by the cooperation of the positioning guide post 112 and the positioning hole, which can ensure that the positioning accuracy of all layers is consistent, and realize the synchronous calibration of multiple inertial measurement units 3 between different layers.

[0049] It is worth noting that a pair of press-fit plates 11 are arranged in parallel and spaced apart above the circuit board 12, and each press-fit plate 11 is also provided with a pair of lifting parts at both ends perpendicular to the spacing direction. The provision of the lifting parts facilitates the operator or automated equipment to quickly and accurately grasp and lift the press-fit plate 11. After the calibration is completed, the press-fit plate 11 can be easily lifted as a whole by the lifting parts, thereby releasing the clamped inertial measurement unit 3, improving the convenience and efficiency of the operation. Secondly, the lifting parts can also avoid direct contact with the surface of the press-fit plate 11, protecting the probe 111 and the circuit board 12 on the press-fit plate 11 from damage. At the same time, the shape and position of the lifting parts have been optimized to ensure that the press-fit plate 11 remains stable during the lifting process and will not tilt or shake, thereby ensuring the safety and integrity of the inertial measurement unit 3 during the release process. In addition, the lifting parts can also be used in conjunction with the robotic arm or conveying device in the automated production line. For example, the robotic arm can realize automatic loading and unloading of the press plate 11 by clamping or hooking the lifting part, further improving the automation level and production efficiency of the calibration device, so that the calibration device can better adapt to the needs of modern large-scale production, reduce manual intervention, and reduce production costs.

[0050] Furthermore, a plurality of receiving grooves are provided at the bottom of the press-fit plate 11 , which correspond to the placement grooves 131 on the bottom plate 13 and are used to receive the top of the inertial measurement unit 3 .

[0051] In this embodiment, when the inertial measurement unit 3 is placed in the placement groove 131 of the base plate 13, the receiving groove can just accommodate the top of the inertial measurement unit 3, ensuring that the module is accurately positioned and firmly supported in the vertical direction. This not only improves the stability of the inertial measurement unit 3 during the calibration process, but also effectively avoids calibration errors caused by module position offset.

[0052] Specifically, the shape and size of the receiving groove match the top profile of the inertial measurement unit 3, ensuring that the module does not shake or tilt during the press-fitting process while also preventing excessive pressure on the module, thereby protecting the module's outer shell and internal components from damage. Furthermore, the edges of the receiving groove feature rounded transitions, reducing wear on the top of the inertial measurement unit 3 and extending the module's service life. Furthermore, the receiving groove works in conjunction with the placement groove 131 on the base plate 13 to form a complete clamping system. When the press-fit plate 11 is pressed downward, the receiving groove and placement groove 131 work together to ensure the precise positioning of the inertial measurement unit 3 in three-dimensional space. This not only improves calibration accuracy but also provides a reliable foundation for subsequent automated calibration processes. In the multi-layer tooling assembly 1 structure, the receiving groove on each press-fit plate 11 precisely aligns with the placement groove 131 on the corresponding base plate 13, enabling the entire device to efficiently and stably calibrate multiple inertial measurement units 3 simultaneously. This batch processing capability significantly improves production efficiency and reduces the calibration cost of a single module, making it particularly suitable for large-scale production environments.

[0053] In short, the accommodating groove, through close cooperation with the placement groove 131, realizes the rapid clamping, precise positioning and stable support of the inertial measurement unit 3, providing a strong guarantee for improving the calibration efficiency and quality.

[0054] Further, refer to Figure 1 and Figure 4 Support block 2 has first fixing holes at both ends in the vertical direction. These holes are vertically secured to base plate 13 via fixing members. Fixing members include, but are not limited to, bolts and screws. This vertical fixing method effectively prevents vertical displacement of support block 2, ensuring the vertical stability of the multi-layer structure.

[0055] The bottom plate 13 is provided with a snap-fitting groove 132 on its side, and the support block 2 is provided with a snap-fitting portion 22 on its top. This snap-fitting portion 22 is adapted to fit within the snap-fitting groove 132 of the upper bottom plate 13. This not only facilitates quick alignment and connection between the upper and lower bottom plates 13, but also enhances structural stability. The combination of the snap-fitting portion 22 and the snap-fitting groove 132 prevents horizontal displacement of the bottom plate 13, ensuring the horizontal stability of the multi-layer structure.

[0056] A second fixing hole 21 is provided on the side of the clamping portion 22. This second fixing hole 21 is horizontally secured to the bottom of the clamping slot 132 via a fixing member. This horizontal securing method further strengthens the connection between the support block 2 and the base plate 13, ensuring that the entire multi-layer structure remains stable and prevents loosening or displacement even when subjected to external forces during calibration.

[0057] It is worth noting that the dual vertical and horizontal fixation of the support blocks 2 not only improves the stability and reliability of the entire device, but also makes assembly and disassembly more convenient. When adjusting the layer spacing or replacing a tooling component 1, simply loosen the corresponding fixings to complete the operation quickly, improving production efficiency and maintenance convenience.

[0058] Furthermore, the top and bottom of the support block 2 located at the bottom are both provided with a clamping portion 22 , and the two clamping portions 22 are used to clamp the upper and lower adjacent bottom plates 13 .

[0059] In this embodiment, the top and bottom of the support block 2 located at the bottom are both provided with a clamping portion 22, so that the support block 2 can be stably connected to the upper and lower bottom plates 13 at the same time.

[0060] Specifically, at this time, the bottom support block 2 is cross-shaped, and the clamping portion 22 at the top of the bottom support block 2 is used to engage with the clamping groove 132 of the upper adjacent base plate 13, while the clamping portion 22 at the bottom is used to engage with the clamping groove 132 of the lower adjacent base plate 13. This two-way clamping structure not only provides multi-point support for the support block 2, enhancing the longitudinal stability of the entire multi-layer structure, but also enhances the structural strength of the bottom support block 2, enabling it to withstand greater pressure and weight, and ensuring precise alignment between adjacent base plates 13. This cross-shaped support block 2 also has good symmetry and versatility, so that its connection ability in different directions is balanced and can adapt to a variety of layout requirements. In actual applications, this support block 2 can effectively prevent structural deformation caused by uneven force at a single point, thereby extending the service life of the device.

[0061] The remaining support blocks 2 are convex-shaped, with a snap-fit ​​portion 22 at the top that engages with the snap-fit ​​groove 132 of the upper base plate 13. The bottoms provide stable support by connecting to the support block 2 below or the base plate 13. The convex-shaped support blocks 2 meet connection requirements while being smaller and lighter, making them easier to manufacture and install, and reducing the complexity and cost of the overall structure. This differentiation in shape ensures that the bottommost support block 2 has greater connection capability and stability, while the other support blocks 2 achieve structural simplification and cost optimization while still ensuring basic connection functionality.

[0062] It is worth noting that the bottom of the remaining support blocks 2 is also provided with a ventilation groove 221, which matches the clamping groove 132 to assist in heat dissipation. At this time, the ventilation groove 221 allows air to circulate between layers without affecting the connection strength between the support block 2 and the base plate 13, forming an effective heat dissipation channel. During the calibration process, the inertial measurement unit 3 will generate a certain amount of heat. If this heat cannot be dissipated in time, it may affect the performance of the module and the accuracy of the calibration. The setting of the ventilation groove 221 is precisely to solve this problem. It allows hot air to rise and escape, while allowing cold air to be replenished, thereby forming natural convection inside the multi-layer structure to assist in heat dissipation.

[0063] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A batch calibration device for an inertial measurement unit, characterized in that: It includes a tooling assembly and a support block, wherein the tooling assembly is arranged in layers and intervals along the vertical direction through the support block, and each tooling assembly includes a press plate, a circuit board and a bottom plate; The base plate is provided with a plurality of placement slots for positioning the inertial measurement units. The circuit board is fixedly mounted above the base plate and is suitable for signal connection with the positioning inertial measurement units. The circuit board is provided with through holes corresponding to the positions of the placement slots. The press-fit plate is suitable for being fixedly mounted above the circuit board and clamping the plurality of inertial measurement units between the press-fit plate and the base plate. The support blocks are arranged on both sides of the base plate, and the support blocks connect the adjacent upper and lower base plates so that the plurality of tooling components maintain a set layer spacing.

2. The batch calibration device for an inertial measurement unit according to claim 1, characterized in that: The opening size of the through hole is larger than the outline size of the placement groove, so that a gap is maintained between the inertial measurement unit and the through hole of the circuit board; the press-fit plate and the circuit board are both fixed to the base plate by positioning pins.

3. The batch calibration device for an inertial measurement unit according to claim 1, characterized in that: The press-fit plate is further provided with a plurality of positioning guide posts, and the bottom plate is correspondingly provided with positioning holes. The positioning guide posts are suitable for passing through the press-fit plate and the circuit board and being inserted into the positioning holes of the bottom plate.

4. The batch calibration device for an inertial measurement unit according to claim 1, characterized in that: The bottom of the press-fit plate is further provided with a plurality of accommodating grooves, which correspond to the placement grooves on the bottom plate and are used to accommodate the top of the inertial measurement unit.

5. The batch calibration device for an inertial measurement unit according to claim 1, characterized in that: A pair of press-fit plates are arranged above the circuit board in parallel and at intervals, and each press-fit plate is provided with a pair of lifting portions at both ends perpendicular to the spacing direction thereof.

6. The batch calibration device for inertial measurement units according to any one of claims 1 to 5, characterized in that: Both ends of the support block are provided with first fixing holes in the vertical direction, and the first fixing holes are fastened to the base plate in the vertical direction through fixing members; A snap-fit ​​groove is provided on the side of the bottom plate, and a snap-fit ​​portion is provided on the top of the support block, wherein the snap-fit ​​portion is adapted to be embedded in the snap-fit ​​groove of the adjacent upper bottom plate; A second fixing hole is provided on the side surface of the clamping portion, and the second fixing hole is fastened horizontally to the bottom of the clamping slot through a fixing piece.

7. The batch calibration device for inertial measurement units according to claim 6, characterized in that: The bottom of the support block is further provided with a ventilation groove, which matches the clamping groove and is used to assist in heat dissipation.

8. The batch calibration device for inertial measurement units according to claim 6, characterized in that: The top and bottom of the support block located at the bottom are both provided with the clamping parts, and the two clamping parts are used to clamp the upper and lower adjacent bottom plates.

9. The batch calibration device for inertial measurement units according to claim 1, characterized in that: The inertial measurement unit is provided with a male connector, and the placement slot is also provided with a communication adapter board, on which a female connector matching the male connector is integrated, and the communication adapter board is connected to the circuit board via a flexible cable; Alternatively, a specific test point is provided on the inertial measurement unit, a communication adapter board is provided on the press-fit plate, a probe is provided on the communication adapter board, the probe corresponds to the position of the test point, and the communication adapter board is connected to the circuit board via a flexible cable.

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