IMU accelerometer batch calibration tool

Abstract

The utility model discloses an IMU accelerometer batch calibration tool comprising a hollow tool frame provided with a mounting bottom plate, the mounting bottom plate is provided with a plurality of groups of parallel leaning surfaces, and a plurality of fixing holes are arranged among the leaning surfaces; the fixed seats are distributed along the leaning surface in an array manner, and stepped bosses are arranged on the fixed seats; one end of a pressing strip provided with a fixing groove is matched with the stepped boss of the fixing seat, and the other end of the pressing strip is an end face for pressing the IMU accelerometer; and the fixing piece passes through the fixing groove and is connected with the fixing hole so as to press the IMU accelerometer. According to the utility model, the array type fixing positions are designed on the mounting bottom plate, so that a plurality of products can be mounted at the same time; the mounting leaning surface can be used for accurately mounting and positioning the MU accelerometer; a pressing strip type fixing mode is adopted, and the fixing position can be flexibly adjusted according to the appearance size of products to adapt to installation of different types of products.

Description

Technical Field

[0001] The utility model belongs to the field of inertial measurement tooling, and in particular relates to an IMU accelerometer batch calibration tooling. Background Art

[0002] Inertial measurement unit (IMU) products generally need to be fixed on a hexahedron fixture, with a precise horizontal surface, to provide an accurate horizontal or vertical reference for the product being tested, so as to complete the calibration and testing of the accelerometer sensor in the IMU. Since different models of IMU have different dimensions and mechanical interfaces, each model requires a dedicated hexahedron fixture. In addition, common calibration fixtures can generally only install one product at a time, which takes a long time to deal with calibration tasks for large quantities of products. Summary of the invention

[0003] The technical problem solved by the utility model is to provide an IMU accelerometer batch calibration tool, which can be applied to the batch calibration of multiple models of IMU accelerometers.

[0004] The utility model is realized by the following technical solutions:

[0005] An IMU accelerometer batch calibration tool comprises a hollow tool frame provided with a mounting base, the mounting base is provided with a plurality of sets of parallel support surfaces, a plurality of fixing holes are opened between the support surfaces; fixing seats are distributed in an array along the support surfaces, and stepped bosses are provided on the fixing seats;

[0006] One end of the pressure strip with a fixing groove matches the stepped boss of the fixing seat, and the other end is the end face for pressing the IMU accelerometer; the fixing piece passes through the fixing groove and is connected to the fixing hole to press the IMU accelerometer.

[0007] The step-type boss that fits the adjusting pressure strip with the fixing seat adjusts the pressing height of the pressure strip to match IMU accelerometers of different specifications.

[0008] One side of the hollow tooling frame is provided with a wire outlet groove for passing the cable connected to the IMU accelerometer.

[0009] Furthermore, during the test, the IMU accelerometer under test is placed on the mounting base, with its side surface pressed against the support surface; one end of the pressure strip is placed on the upper surface of the IMU accelerometer, and the other end is adjusted to the height of the stepped boss of the fixed seat. The pressure strip is parallel to the mounting base and fixed with a fixing piece.

[0010] Compared with the prior art, the utility model has the following beneficial technical effects:

[0011] The IMU accelerometer calibration tool provided by the utility model can arrange the calibrated products in an array to realize batch calibration, and the pressure strips, fixings and fixing holes can be adjusted to calibrate the IMU accelerometers, thereby overcoming the disadvantage that the current calibration tool can only be applied to the mechanical interface of a specific model of products, so that the utility model can be applied to the batch calibration of multiple models of products.

[0012] The IMU accelerometer calibration tool provided by the utility model has a hollow hexahedral frame that can provide an accurate three-dimensional rectangular coordinate system; an array-type fixing position is designed on the installation base plate, and multiple products can be installed at the same time; and the installation surface can accurately install and position the MU accelerometer; a pressure strip-type fixing method is adopted, and the fixing position can be flexibly adjusted according to the product's external dimensions to adapt to the installation of products of different models.

[0013] The IMU accelerometer calibration tool provided by the utility model can adapt to the installation of products of different models and dimensions because it adopts a fixing method of a pressure strip, and the pressure strip and the boss adopt a step structure; since multiple groups of supporting surfaces, fixed threaded holes and bosses are provided, multiple products can be installed at the same time to realize batch calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a test installation diagram of the utility model;

[0016] Among them, 1 is the installation base plate, 2 is the outlet groove, 3 is the support surface, 4 is the fixing hole, 5 is the pressure strip, 6 is the stepped boss, 7 is the +Y surface, 8 is the -Z surface, 9 is the -Y surface, 10 is the +Z surface, and 11 is the IMU accelerometer. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings, which are intended to explain the present invention rather than to limit it.

[0018] See also Figure 1 , Figure 2 , an IMU accelerometer batch calibration tool, comprising a hollow tool frame provided with a mounting base plate 1, the mounting base plate 1 is provided with a plurality of sets of parallel support surfaces 3, a plurality of fixing holes 4 are opened between the support surfaces 3; the fixing seats are distributed in an array along the support surfaces, and the fixing seats are provided with a stepped boss 6;

[0019] One end of the pressure strip 5 with a fixing groove matches the stepped boss of the fixing seat, and the other end is the end face for pressing the IMU accelerometer 11 ; the fixing piece passes through the fixing groove and is connected to the fixing hole 4 to press the IMU accelerometer 11 .

[0020] Furthermore, the stepped boss that fits the pressure strip 5 with the fixing seat is adjusted, and the pressing height of the pressure strip 5 is adjusted to match IMU accelerometers of different specifications.

[0021] A wire outlet groove 2 is provided on one side of the hollow tooling frame for passing the cable connected to the IMU accelerometer.

[0022] During the test, the IMU accelerometer under test is placed on the mounting base, with its side surface pressed against the support surface 3; one end of the pressure strip 5 is placed on the upper surface of the IMU accelerometer, and the other end is adjusted to the height of the stepped boss of the fixing seat. The pressure strip 5 is parallel to the mounting base 1 and fixed with a fixing piece.

[0023] Specific examples are given below.

[0024] like Figure 1 As shown, the top surface of the hexahedron tooling frame is the +X surface, the bottom surface is the -X surface, and the +X surface is parallel to the -X surface; the front is the +Y surface, the back is the -Y surface, and the +Y surface is parallel to the -Y surface; the right side is the +Z surface, the left side is the -Z surface, and the +Z surface is parallel to the -Z surface; the X, Y, and Z surfaces are perpendicular to each other, and the direction definition conforms to the right-hand rule, which can provide an accurate three-dimensional rectangular coordinate system. Specifically, the hexahedron tooling is made of high-strength aviation aluminum and high-precision GNC integrated processing to prevent tooling deformation from affecting installation accuracy.

[0025] The frame +Y surface is provided with a cable outlet trough, through which the communication cables and power supply cables of all tested products pass to connect with the test unit and external power supply, so as to facilitate the collection of product data;

[0026] A mounting base plate is provided inside the frame, and the mounting base plate is parallel to the ±X plane of the frame;

[0027] Three sets of support surfaces are set on the installation base plate, and the support surfaces are parallel to the ±Y planes of the frame;

[0028] Five groups of M4 threaded holes are arranged along the backing surface on the installation base plate, three in each group, and each group of threaded holes is arranged perpendicular to the backing surface;

[0029] Each installation position on the installation base plate is provided with a stepped boss for fixing the pressure strip;

[0030] The rectangular pressure strip is used to fix the product. There is a long hole in the middle for M4 screw fixing. One end of the pressure strip is a stepped structure, which cooperates with the step of the boss to adjust the height of the pressure strip.

[0031] like Figure 2As shown, during the test, the product to be tested is placed on the mounting base plate so that the side of the product is pressed against the corresponding support surface. Then the pressure strip is placed on the upper surface of the product. The step at one end of the pressure strip and the boss step are adjusted to a suitable height so that the pressure strip can tightly press the product. Then, using fixing screws and selecting suitable fixing threaded holes, the product to be tested is fixedly connected to the tooling through the pressure strip to prevent the product from shaking or shifting.

[0032] like Figure 2 As shown in the figure, the tooling has three sets of support surfaces, each with 5 sets of fixed threaded holes and 5 bosses, so 15 products can be installed at the same time for calibration or testing. If more products need to be calibrated at the same time, the number of pressure strips or threaded holes and bosses can be appropriately increased.

[0033] The above embodiments are preferred examples for implementing the present invention, and the present invention is not limited to the above embodiments. Any non-essential additions and substitutions made by those skilled in the art based on the technical features of the present invention are within the protection scope of the present invention.

Claims

1. An IMU accelerometer batch calibration tool, characterized in that: It comprises a hollow tooling frame provided with a mounting base, the mounting base is provided with a plurality of sets of parallel leaning surfaces, a plurality of fixing holes are opened between the leaning surfaces; the fixing seats are distributed in an array along the leaning surfaces, and the fixing seats are provided with stepped bosses; One end of the pressure strip with a fixing groove matches the stepped boss of the fixing seat, and the other end is the end face for pressing the IMU accelerometer; the fixing piece passes through the fixing groove and is connected to the fixing hole to press the IMU accelerometer.

2. The IMU accelerometer batch calibration tool as claimed in claim 1, characterized in that: The stepped boss that fits the pressure strip with the fixing seat is adjusted, and the pressing height of the pressure strip is adjusted to match IMU accelerometers of different specifications.

3. The IMU accelerometer batch calibration tool as claimed in claim 1, characterized in that: One side of the hollow tooling frame is provided with a wire outlet groove for passing the cable connected to the IMU accelerometer.

4. The IMU accelerometer batch calibration tool as claimed in claim 1, characterized in that: During the test, the IMU accelerometer under test is placed on the mounting base, with its side surface pressed against the support surface; one end of the pressure strip is placed on the upper surface of the IMU accelerometer, and the other end is adjusted to the height of the stepped boss of the fixing seat. The pressure strip is parallel to the mounting base and fixed with a fixing piece.

Images