IMU (Inertial Measurement Unit) test tool for large-scale rapid automatic calibration test and tool system of IMU test tool

The IMU test fixture system, which utilizes CAN bus communication and multi-threaded data processing, solves the problem of large-scale calibration testing of inertial measurement units, achieving efficient and stable data acquisition and transmission, and improving production efficiency and equipment utilization.

CN223954924UActive Publication Date: 2026-02-27SHANGHAI HUAYI INFORMATION TECH CO LTD
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Patent Information

Application Number
CN202520556648.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-27
Publication Date
2026-02-27
Estimated Expiration
2035-03-27

AI Technical Summary

Technical Problem

Existing technologies make it difficult to achieve rapid calibration testing of inertial measurement units in large batches, and the serial communication method results in low data acquisition efficiency, making it impossible to achieve stable batch testing.

Method used

A modular IMU test fixture system is designed, which replaces serial communication with CAN bus communication. It includes a multi-layer fixture product layer and a control layer. Data from multiple products is acquired through the CAN bus, and multi-threaded data processing and hard disk storage technologies are used to ensure continuous data transmission and efficient utilization of computer resources.

Benefits of technology

Simultaneous testing of 320 inertial measurement units was achieved, which improved production efficiency, reduced labor requirements and maintenance costs, simplified communication wiring, enhanced equipment compatibility and flexibility, and reduced the risk of test interruption.

✦ Generated by Eureka AI based on patent content.

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Abstract

An IMU test tool and system for large-scale rapid automatic calibration test comprises a test tool bottom plate and multiple tool product layers fixed on the test tool bottom plate, each product layer of the multiple tool product layers comprises a test bottom plate and a mainboard connecting plate arranged in the middle of the test bottom plate, the mainboard connecting plate is used for connecting two test mainboards arranged on the two sides of the mainboard connecting plate respectively, and the mainboard connecting plate is used for connecting two test mainboards arranged on the two sides of the mainboard connecting plate. The IMU monitoring board is arranged in the middle of the mainboard connecting board and used for monitoring the levelness of the tool product layer; each of the two test mainboards is provided with six CAN (Controller Area Network) modules which meet 4-6pcs product data transmission, totally supports 32pcs product test, and communicates with the outside through a 10PIN communication interface of one test mainboard; the other side of the mainboard connection board is provided with an adapter board which is connected and communicated with a to-be-tested product. The product layer raising block is arranged on the test bottom plate; a to-be-tested IMU product test position; and the 10PIN communication interface comprises a test data communication interface and a power supply interface and is connected with the test tool control layer. According to the utility model, large-batch rapid calibration test can be carried out on the inertial measurement unit, and the production efficiency is greatly improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to IMU (inertial sensor) advanced manufacturing and automation test, specifically, the utility model relates to a kind of for large quantities of fast automatic calibration test IMU (inertial measurement unit) test tool and its tool system. BACKGROUND

[0002] IMU sensor, i.e. inertial measurement unit, is an electronic device integrated with accelerometer and gyroscope, used to accurately measure and monitor the acceleration, angular velocity and direction of object and other key information. Such sensor plays a key role in high-tech and automation field, and its application range is wide, including but not limited to automobile and automatic driving technology, aviation and aerospace application, industrial automation, consumer electronics, medical equipment, military and defense, internet of things equipment and manufacturing and aeronautical engineering fields. With the continuous progress of technology and the continuous expansion of application field, the performance, precision and application range of IMU sensor will be affected by the future technology development trend. Therefore, IMU sensor is of great significance to improve the performance, precision and automation level of product, but the large batch industrial automation production calibration test of IMU is a problem in the industry.

[0003] Inertial measurement unit must be calibrated in advance to improve its precision, specifically to determine its various deterministic error coefficients and compensate in the collected raw data. With the wide popularity of electric vehicles, in recent years, vehicle networking, automatic driving, unmanned driving, automobile intelligentization and networking have become hot topics in the automobile industry, and future cars must develop towards safety, reliability and comfort. The development behind all this cannot be separated from the role of sensors, so the market demand is increasing. However, from production to delivery, the test items of inertial measurement unit include temperature cycle test, aging test, zero temperature compensation test, scale factor temperature compensation test, calibration test, verification test, static on-off, Allan test, etc., and the test cycle is long. How to quickly and effectively reduce the cost of data acquisition, testing, scaling and data processing is a difficult problem.

[0004] In addition, inertial measurement unit generally communicates data through serial port (including RS422, RS232, RS485 and other serial port protocols), and computer cannot batch collect data when collecting inertial measurement unit data through serial port, so it is difficult to realize large batch stable test of IMU. UTILITY MODEL CONTENT

[0005] To overcome the above problems, the utility model discloses the purpose at: provide a kind of industrial automation production calibration test's IMU (inertial measurement unit) test tool and its tool system, more specifically, provide a kind of IMU (inertial measurement unit) test tool and its tool system for large batch quick automatic calibration test, the utility model can be stacked and fixed 5 layers of tool product layer, single-layer tool product layer can place 64pcs product, the product of a group of tool is measured simultaneously 320PCS, whereby, can greatly improve production efficiency, solve the problem that inertial measurement unit cannot be large batch and fast calibration test.

[0006] According to the utility model,

[0007] 1, CAN bus communication mode replaces the previous serial communication mode, on the one hand, improves the data transmission rate, thereby improving the product's measured number, on the one hand, simplifies the communication wiring of the whole test tool, and only one CAN bus can obtain the message data of 64pcs products, instead of 64pcs products being connected with the test computer for communication through 64 serial ports.

[0008] 2, the test program continuously collects data through a separate thread, is not interfered with other, guarantees the continuity of data acquisition, and then sends the collected data to other threads through queue. At the same time, save data to hard disk in separate thread, receive data sent by queue of collection thread, save to memory. When reaching the set condition (such as saving data once every 5 seconds), pause receiving data, save existing data to hard disk, then empty the data in memory, to ensure that the program will not crash due to too large data volume. 320PCS or even larger batch of simultaneous measurement, for the test computer, the data throughput in a short time is very large, which is easy to cause CPU and memory occupancy to be too high, the above method is used to reduce CPU and memory occupancy, to prevent test data loss, test interruption, test crash and other problems caused by hardware limitation of test computer itself during testing.

[0009] 3. The utility model is suitable for calibration and test production line of IMU product, under the premise that original test station and machine table (such as rotary table, temperature box, marble platform etc.) are not changed, only through the innovation of test tool, the purpose of large batch simultaneous measurement can be realized.

[0010] Technical scheme

[0011] To achieve the above object, the technical scheme of the utility model is as follows:

[0012] An IMU test tool for large batch quick automatic calibration test, characterized by:

[0013] The IMU test tool comprises:

[0014] Test tool bottom plate,

[0015] a plurality of layers of tooling product layers fixed to the bottom plate of the test tooling,

[0016] each of the plurality of layers of tooling product layers comprises:

[0017] a test bottom plate,

[0018] a main plate connecting plate arranged in the middle of the test bottom plate, the main plate connecting plate being used for connecting test main plates-1 and test main plates-2 arranged on two sides of the main plate connecting plate respectively, and

[0019] an IMU monitoring plate arranged in the middle of the main plate connecting plate, the IMU monitoring plate being used for monitoring a level parameter index of the test tooling product layers themselves in a test process,

[0020] each of the test main plates-1 and the test main plates-2 is provided with six CAN modules, each of the CAN modules satisfies data transmission of 4-6 pcs of products, and a total of 32 pcs of products are supported for test, the test main plate-1 is connected with the test main plate-2 through the main plate connecting plate to form a complete test main plate, and the test main plate-2 is connected with the outside through a 10PIN communication interface for communication;

[0021] a product adapter plate arranged on the other side of the main plate connecting plate and used for connecting and communicating with a product to be tested, the product adapter plate is connected with the product to be tested through a connecting line provided on the product to be tested, and the other end of the product adapter plate is connected to the corresponding test main plate-1 or test main plate-2,

[0022] product layer heightening blocks made of AL7075 and arranged at intervals on the periphery of the test bottom plate and used for ensuring the height of the product layers and the parallelism between the product layers,

[0023] a test position of an IMU product to be tested, the IMU product being an IMU inertial measurement unit, the IMU product being internally integrated with a high-precision MEMS gyroscope and a high-precision MEMS accelerometer, and

[0024] a 10PIN communication interface including a test data communication interface and a power supply interface and being connected with a test tooling control layer.

[0025] The test main plate is divided into two parts due to the high value of the test main plate, which is beneficial to maintenance and replacement in the later period and reduces the maintenance and replacement cost.

[0026] The utility model relates to an IMU test tooling for large-batch rapid automatic calibration test, and has the characteristics that:

[0027] The test main plate-1 is rectangular, the test main plate-2 is "L" shaped, a 10PIN communication interface and a two-dimensional code plate are arranged at the bottom foot of the "L" shaped test main plate-2, the two-dimensional code plate is used for test result tracing, and the two-dimensional code of each product layer is unique.

[0028] The utility model relates to a kind of IMU test tool for large batch rapid automatic calibration test, it is characterized by:

[0029] Control layer is arranged on each set of tool product layer,

[0030] Control layer includes control layer bottom plate, and control board is arranged on control layer bottom plate,

[0031] One side of control board is equipped with total power supply interface and product layer communication and power supply interface, and the other side of control board is equipped with total communication interface.

[0032] Control board: external USB CANFD and power supply and the like instrument, a control board can support connection 5 layers tool product layer.

[0033] The utility model relates to a kind of IMU test tool for large batch rapid automatic calibration test, it is characterized by:

[0034] The control layer bottom plate: upper and lower surface flatness is ≤0.02mm / 100mm, and upper and lower surface roughness is ≤Ra0.8 μm.

[0035] Therefore, for satisfying IMU product test precision requirement, test base plate is provided with the screw hole of product fixation.

[0036] The utility model relates to a kind of IMU test tool for large batch rapid automatic calibration test, it is characterized by:

[0037] The product layer cushioning block: cushioning block height is 30mm, each cushioning block is fixed with test base plate simultaneously, and another product layer can also be fixed and stacked by screw hole,

[0038] Upper and lower surface flatness of product layer cushioning block is ≤0.02mm / 100mm, and upper and lower surface roughness is ≤Ra0.8 μm.

[0039] Preferably, each cushioning block is fixed with test base plate by 2 M4 screws, and simultaneously, one M8 screw hole is reserved, for being fixed and stacked with another product layer by M8 screw.

[0040] The utility model relates to a kind of IMU test tool for large batch rapid automatic calibration test, it is characterized by:

[0041] The IMU monitoring board: flatness requirement is ≤0.02mm / 100mm.

[0042] The utility model relates to a kind of IMU test tool for large batch rapid automatic calibration test, it is characterized by:

[0043] The hardware of each product layer of tool is respectively composed of following single-layer system:

[0044] The interface part is a DC 24V / 5V input port and a CANFD communication port;

[0045] The communication module, i.e., the CAN module, is connected with six products to be tested through six UARTs, collects the serial port information of the six products, and sends the data to the CANFD bus after data arrangement.

[0046] Each single product layer is connected with 12 CAN nodes, one CAN node corresponds to 4-6 PCS products, each layer can support 64 PCS product testing, and the product layers of each layer are configured in the same way, so as to facilitate subsequent tooling replication.

[0047] The utility model relates to an IMU test tooling for large batch rapid automatic calibration test, and the utility model discloses the following:

[0048] 5 layers of product layers plus 1 layer of control layer are a group of completed test tooling, the maximum same test number of each group of tooling is 320pcs, the CAN bus communication mode is used to replace the serial communication mode, 64PCS product message data are acquired through 12 CAN nodes on the test mainboard, and then the data are transmitted to the USB CANFD and test computer through a CAN bus.

[0049] Therefore, on one hand, the data transmission rate is improved, so that the same test number of products is improved, and on the other hand, the communication wiring of the whole test tooling is simplified, and the message data of 64pcs products can be acquired through only one CAN bus, instead of 64pcs products being connected with the test computer for communication through 64 serial port channels.

[0050] The utility model relates to an IMU test tooling for large batch rapid automatic calibration test, and the utility model discloses the following:

[0051] The IMU monitoring board is provided with a MEMS module to ensure the levelness of the whole product layer of the test tooling.

[0052] The MEMS module is a micro-electro-mechanical system (MEMS), which is a micro processing module integrating micro sensor, micro actuator, micro mechanical structure, micro power supply, signal processing and control circuit, high-performance electronic integrated device, interface and communication functions.

[0053] An IMU test tool system for large batch rapid automatic calibration test, using the IMU test tool of any one of the above, the large batch rapid calibration test tool system device comprises: a test PC, a test PC connected by telecommunication, a programmable power supply for supplying power for the test tool controlled by serial communication, a test tool product layer powered by a test tool total power supply interface, a USB CANFD connected by telecommunication between the test PC and the test tool product layer,

[0054] It is characterized in that:

[0055] The test tool product layer is a 5-layer test tool product layer, each layer of product layer is hung with 12 CAN nodes, one CAN node corresponds to 4-6 PCS products, and each layer can support the test of 64 PCS products;

[0056] The PC controls the programmable power supply through serial communication, and supplies power for the test tool product layer,

[0057] The programmable power supply supplies power for the test tool product layer through the test tool total power supply interface,

[0058] The test tool product layer is a same test tool, obtains the communication instruction issued by the PC through the total communication interface, and returns the corresponding data message,

[0059] The PC controls the USB CANFD through the USB interface, sends an instruction to each product of the test tool, and obtains the corresponding data message,

[0060] 5-layer tool product layer plus 1-layer control layer is a complete test tool of each group, and the maximum same test number of each group of tools is 320pcs.

[0061] According to the utility model, the USB CANFD comprises a USB-to-CAN FD interface converter, a CAN / CAN FD bus communication interface card and a CAN / CAN FD protocol data analyzer.

[0062] The utility model has the effect of:

[0063] The CAN bus communication mode is used to replace the previous serial communication mode: through the 12 CAN nodes on the test mainboard, the message data of 64 PCS products are acquired, and then the data is transmitted to the USB CANFD and the test computer through one CAN bus. On the one hand, the data transmission rate is improved, so that the same test number of products is improved, and on the other hand, the communication wiring of the whole test tool is simplified, and the message data of 64pcs products can be acquired through one CAN bus, instead of 64pcs products being connected with the test computer for communication through 64 serial ports.

[0064] Compared with the prior art, the utility model each group maximum same test number 320pcs of tooling, solved the problem that inertial measurement unit can't carry out fast calibration test in large quantities, greatly reduced the artificial demand (personnel reduced nearly 50%), reduced cost, the modular design of the utility model supports flexible extension, adapts to different scale and type's IMU calibration demand, and the compatibility is strong, promotes equipment utilization rate, and the operation is simple and convenient, and the maintenance is convenient, reduces downtime, and the test mainboard is divided into 2 blocks, is favorable to the maintenance replacement of later period, reduces the maintenance replacement cost. BRIEF DESCRIPTION OF DRAWINGS

[0065] Figure 1 It is inertial measurement unit mass rapid calibration test tooling system device schematic diagram of the utility model,

[0066] Figure 2 It is tooling product layer schematic diagram of the utility model,

[0067] Figure 3A B respectively is mass rapid calibration test system tooling product layer single layer schematic diagram of the utility model,

[0068] Figure 4 It is tooling product layer installation process schematic diagram of the utility model,

[0069] Figure 5 It is CAN / UART mutual conversion module principle diagram of the utility model,

[0070] Figure 6A B respectively is single layer tooling product layer schematic diagram, shows single layer tooling product layer can place 64pcs product.

[0071] Figure 6C It is 5 layer tooling product layer schematic diagram.

[0072] Figure 7 It is test tooling control layer bottom plate and control board thereof schematic diagram.

[0073] Figure 8 It is test tooling product layer stereogram schematic diagram.

[0074] Figure 9 It is product installation schematic diagram.

[0075] Figure 10 It is the schematic diagram of the cushioning block. DETAILED DESCRIPTION

[0076] Example 1

[0077] See Figure 2 , Figure 5 , Figure 7 and Figure 8 :

[0078] Multi-layer tooling product layers fixed on the bottom plate of the test tooling,

[0079] Each product layer of the multi-layer tooling product layers comprises:

[0080] The test bottom plate is provided with screw holes for fixing the products.

[0081] The main plate connecting plate is arranged in the middle of the test bottom plate and is used for connecting the test main plate-1 and the test main plate-2 arranged on the two sides of the main plate connecting plate and

[0082] The IMU monitoring plate is arranged on one side of the main plate connecting plate and is used for monitoring the level and other parameter indexes of the test tooling product layers during the test,

[0083] The test main plate-1 and the test main plate-2 are each provided with six CAN modules, each CAN module satisfies the data transmission of 4-6 pcs of products, a total of 32 pcs of products are supported for test, the test main plate-1 is connected with the test main plate-2 through the main plate connecting plate to form a complete test main plate, and the test main plate-2 is connected with the outside through the 10PIN communication interface for unified communication;

[0084] The product adapter plate is arranged on the other side of the main plate connecting plate and is used for connecting and communicating with the products to be tested, is connected with the product adapter plate through the connecting line of the product to be tested, and the other end is connected to the corresponding test main plate-1 or test main plate-2,

[0085] The product layer heightening blocks of AL7075 material are arranged at intervals on the periphery of the test bottom plate and are used for ensuring the product layer height and the parallelism between layers, the test position of the IMU product to be tested, and

[0086] The 10PIN communication interface includes a test data communication interface and a power supply interface and is connected with the test tooling control layer.

[0087] Installation: the products are positioned in the positioning holes of the test bottom plate in sequence, the wires are connected, the locking screws are fixed, the two-dimensional code plate is scanned in sequence for each layer, 64 pcs of products can be placed in a single-layer tooling product layer, and the single-layer tooling product layer is fixed on the product layer bottom plate through screws;

[0088] Each product layer is fixed through the product layer heightening blocks by screws, 5 layers of tooling product layers can be stacked and fixed, and 1 layer of control layer is installed above the stacked tooling product layers, the control layer includes a control layer bottom plate and a control plate arranged on the control layer bottom plate.

[0089] The control plate is provided with a total power supply interface and a product layer communication and power supply interface on one side and is provided with a total communication interface on the other side. The 10PIN communication interface and the two-dimensional code plate are arranged at the “L” shaped feet of the test main plate-2, and the two-dimensional code plate is used for test result tracing, and the two-dimensional code of each product layer is unique.

[0090] 7 pieces of product layer heightening blocks made of AL7075 are arranged at the periphery of the test base plate to ensure the height of the product layer and the parallelism between layers, and the product layer and the control layer are connected through corresponding connecting lines. After the 5 product layers are stacked in turn and fixed by screws, 1 layer of control layer is added to complete 1 set of test tooling. The maximum number of simultaneous tests for each set of tooling is 320pcs.

[0091] In addition, each heightening block is fixed to the test base plate by 2 M4 screws, and a M8 screw hole is reserved for stacking with another product layer through M8 screws.

[0092] Example 2, see Figure 1 :

[0093] The IMU test tooling is used in a large-batch rapid automatic calibration test IMU test tooling system. The large-batch rapid calibration test tooling system device comprises: a test PC, a test PC connected by telecommunication, a program-controlled power supply for supplying power to the test tooling, a test tooling product layer receiving power through a test tooling total power supply interface, a USB CANFD connected by telecommunication between the test PC and the test tooling product layer,

[0094] characterized in that

[0095] The test tooling product layer is a 5-layer test tooling product layer, each layer of product layer is connected with 12 CAN nodes, one CAN node corresponds to 4-6 PCS products, and each layer can support the test of 64 PCS products;

[0096] The USB CANFD comprises: a USB-to-CAN FD interface converter, a CAN / CAN FD bus communication interface card, and a CAN / CANFD protocol data analyzer,

[0097] The PC controls the program-controlled power supply through serial communication to supply power to the test tooling product layer,

[0098] The program-controlled power supply supplies power to the test tooling product layer through the test tooling total power supply interface,

[0099] The test tooling product layer is a simultaneous test tooling, which obtains communication instructions issued by the PC through the total communication interface and returns corresponding data messages,

[0100] The PC controls the USB CANFD through the USB interface to send instructions to each product of the test tooling and obtain corresponding data messages.

[0101] The inertial measurement unit is connected to the networked data test system, and up to 320 products can be connected;

[0102] The networked data test system is connected to the test computer through the network port; according to the tool driving program (software), the test computer can collect 320 product data through CANFD to USB at the same time; the CANFD sending capacity is 12500 frames / second, the CANFD receiving capacity is 22000 frames / second, and the USB2.0 transmission rate is 480Mbps. The networked data test system has four external interfaces, a set of tool products with a test number of 320PCS, which can be connected to 320 inertial measurement units at the same time, and each interface can realize the power supply and data transmission function of the product.

[0103] The system composed of the networked data test system and the inertial measurement unit is powered on, the networked data test system collects the output data of the inertial measurement unit through the CANFD communication protocol customized by the application layer, and stores it to the test computer; and transmits it to the remote test computer through the network port.

[0104] After the test is completed, the test computer analyzes the test data through the corresponding data processing software (developed by Labview), and uploads the calibration parameters (values calculated by software) of the inertial measurement unit to the server database;

[0105] Use CanFD API (CAN FD (Controller Area Network with Flexible Data-Rate) to collect data, use multi-threading, one thread to collect, N threads to process and save data, and use TDMS file technology to save at high speed, perfectly solve the problem of continuous increase of computer memory due to too fast collection speed.

[0106] Using the networked data test system, the calibration parameters are written to the corresponding inertial measurement unit through the communication protocol (original protocol) of the product.

Claims

1. An IMU test tool for large-batch rapid automatic calibration test, characterized in that: the IMU test tool comprises: a test tool base plate, a plurality of tool product layers fixed on the test tool base plate, each product layer of the plurality of tool product layers comprises: a test base plate, a main board connecting plate arranged in the middle of the test base plate, the main board connecting plate being used for connecting test main boards-1 and test main boards-2 arranged on two sides of the main board connecting plate respectively, and an IMU monitoring board arranged in the middle of the main board connecting plate, the IMU monitoring board being used for monitoring a level parameter index of the test tool product layer itself in a test process, the test main boards-1 and the test main boards-2 are each provided with six CAN modules, each CAN module satisfies data transmission of 4-6 pcs of products, a total of 32 pcs of products are supported, the test main boards-1 are connected with the test main boards-2 through the main board connecting plate to form a complete test main board, and the test main board-2 is connected with the outside through a 10PIN communication interface for unified communication; a product adapter plate arranged on the other side of the main board connecting plate is used for connecting and communicating with a product to be tested, the product to be tested is connected with the product adapter plate through a connecting line provided by the product to be tested, and the other end is connected to a corresponding test main board-1 or test main board-2; product layer heightening blocks of AL7075 material are arranged at intervals on the periphery of the test base plate and are used for ensuring the product layer height and the parallelism between layers; a test site of an IMU product to be tested, the IMU product being an IMU inertial measurement unit, the IMU product internally integrating a high-precision MEMS gyroscope and a high-precision MEMS accelerometer; and a 10PIN communication interface including a test data communication interface and a power supply interface and connected with a test tool control layer.

2. The IMU test tool for large-batch rapid automatic calibration test according to claim 1, characterized in that: the test main boards-1 are rectangular, and the test main boards-2 are "L" shaped, a 10PIN communication interface and a two-dimensional code plate are arranged at the bottom foot of the "L" shape of the test main boards-2, and the two-dimensional code plate is used for test result tracing, and the two-dimensional code of each product layer is unique.

3. The IMU test tool for large-batch rapid automatic calibration test according to claim 1, characterized in that: a control layer is arranged on each group of tool product layers, the control layer comprises a control layer base plate and a control board arranged on the control layer base plate, one side of the control board is provided with a total power supply interface and a product layer communication and power supply interface, and the other side of the control board is provided with a total communication interface, the control board is externally connected with a USB CANFD and a power supply instrument, and one control board can support connection of 5 layers of tool product layers.

4. The IMU test tool for large-batch rapid automatic calibration test according to claim 3, characterized in that: the control layer base plate: the upper and lower surface flatness is ≤0.02mm / 100mm, and the upper and lower surface roughness is ≤Ra0.8μm.

5. The IMU test tool for large-batch rapid automatic calibration test according to claim 1, characterized in that: the product layer heightening block: the height of the heightening block is 30mm, each heightening block is fixed with the test base plate, and can also be fixed and stacked with another product layer through a screw hole. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The upper and lower surface flatness of the product layer cushion block is less than or equal to 0.02mm / 100mm, and the upper and lower surface roughness is less than or equal to Ra0.8μm.

6. The IMU test tool for large batch rapid automatic calibration test according to claim 1, characterized in that: The IMU monitoring board has a flatness requirement of less than or equal to 0.02mm / 100mm.

7. The IMU test tool for large batch rapid automatic calibration test according to claim 1, characterized in that: Each product layer hardware of the tool is composed of the following single-layer system: The interface part is a DC 24V / 5V input port and a CANFD communication port; The communication module, i.e. the CAN module, connects 6 products to be tested through 6 UARTs, collects the serial port information of the 6 products, and sends the data to the CANFD bus after processing; Each single-layer product layer is connected with 12 CAN nodes, one CAN node corresponds to 4-6 PCS products, each layer can support 64 PCS product testing, and each product layer is configured identically to facilitate subsequent tool replication.

8. The IMU test tool for large batch rapid automatic calibration test according to claim 1, characterized in that: 5 layers of product layers of the tool plus 1 layer of control layer form a complete test tool, and each test tool can test a maximum of 320pcs. The CAN bus communication mode is used to replace the serial port communication mode, 64 PCS product data is obtained through 12 CAN nodes on the test mainboard, and the data is transmitted to the USB CANFD and the test computer through one CAN bus.

9. The IMU test tool for large batch rapid automatic calibration test according to claim 1, characterized in that: The IMU monitoring board is provided with a MEMS module to ensure the levelness of the entire product layer of the test tool.

10. An IMU test tooling system for high volume rapid automatic calibration testing using the IMU test tooling of any one of claims 1-8, the high volume rapid calibration test tooling system apparatus comprising: The test PC is connected with a test PC through a serial port communication to control a program-controlled power supply for supplying power to the test tool, the test tool product layer is connected with the test PC and the USB CANFD of the test tool product layer through a test tool total power supply interface, characterized in that: The test tool product layer is a 5-layer test tool product layer, each layer of the product layer is connected with 12 CAN nodes, one CAN node corresponds to 4-6 PCS products, and each layer can support 64 PCS product testing; The PC controls the program-controlled power supply through a serial port communication to supply power to the test tool product layer, The program-controlled power supply supplies power to the test tool product layer through a test tool total power supply interface, The test tool product layer is a test tool for simultaneous testing, which obtains communication instructions issued by the PC through a total communication interface and returns corresponding data messages, The PC controls the USB CANFD through a USB interface to send instructions to each product of the test tool and obtain corresponding data messages, 5 layers of product layers of the tool plus 1 layer of control layer form a complete test tool, and each test tool can test a maximum of 320pcs.