Temperature calibration equipment of inertial measurement unit

Abstract

The utility model provides temperature calibration equipment of an inertial measurement unit. The temperature calibration equipment comprises a constant-temperature box, an air pipe and an outdoor unit, a temperature regulation and control air inlet is formed in the shell forming the constant-temperature box, a constant-temperature air outlet and at least one air inlet are formed in the shell forming the outer unit, an air pipe is connected between the temperature regulation and control air inlet and the constant-temperature air outlet, and a heating device, a refrigerating device and a blower device are arranged in an inner cavity of the constant-temperature box; external air enters the inner cavity of the outer unit through the air inlet, the temperature of the air in the inner cavity of the outer unit is adjusted through the heating device and / or the refrigerating device, the adjusted air is fed into the air pipe through the constant-temperature air outlet by the blower device, and then the adjusted air is fed into the inner cavity of the constant-temperature box through the temperature adjusting and controlling air inlet by the air pipe. The influence of external vibration and interference on calibration of the inertial measurement unit is reduced, the uniformity of the internal temperature of the incubator is improved, and the structural stability and the accurate adjustment of the posture of the test platform are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature calibration, in particular to a temperature calibration device for an inertial measurement unit. Background Art

[0002] Temperature calibration of an inertial measurement unit (IMU) aims to calibrate the IMU and improve its precision and accuracy. Because IMU performance can be affected by varying ambient temperatures, leading to errors and deviations, before conducting IMU temperature calibration, vibration sources should be eliminated or minimized as much as possible, ensuring the flatness of the IMU platform and uniformity of the calibration environment temperature. Existing vibration reduction methods involve the use of damping materials, such as rubber pads and spring dampers, at the IMU's mounting location.

[0003] However, while rubber pads can provide shock absorption, their effectiveness is limited, with poor absorption of high-frequency vibrations. Furthermore, over time, the elasticity of rubber pads decreases, reducing their shock absorption performance. Furthermore, spring shock absorbers exhibit resonance issues. When the external vibration frequency approaches the spring's natural frequency, the shock absorption effect is significantly reduced, and the vibration may even be amplified. Therefore, eliminating or reducing vibration before conducting IMU temperature calibration becomes a pressing issue. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a temperature calibration device for an inertial measurement unit, which not only reduces the impact of external vibration and interference on the calibration of the inertial measurement unit, but also improves the uniformity of the temperature inside the temperature chamber, ensuring the structural stability of the test platform and the precise adjustment of the posture.

[0005] The utility model provides a temperature calibration device for an inertial measurement unit, the temperature calibration device comprising: a constant temperature box, an air duct and an external unit;

[0006] The shell of the thermostat is provided with a temperature control air inlet, the shell of the external unit is provided with a constant temperature air outlet and at least one air inlet, an air duct is connected between the temperature control air inlet and the constant temperature air outlet, and the inner cavity of the external unit is provided with a heating device, a cooling device and a blowing device;

[0007] Among them, the external air enters the inner cavity of the outdoor unit through the air inlet, and the air temperature in the inner cavity of the outdoor unit is adjusted by the heating device and / or the refrigeration device. The regulated air is sent into the air duct by the blowing device through the constant temperature air outlet, and then the air duct sends the regulated air into the inner cavity of the constant temperature box through the temperature control air inlet.

[0008] Furthermore, a stable platform is provided at the bottom of the shell of the thermostat;

[0009] The bottom preset area of ​​the stable platform is provided with foot pads for shock absorption.

[0010] Furthermore, a connecting shaft is fixed above the stabilizing platform, and at least a portion of the connecting shaft passes through the bottom of the shell of the constant temperature box and extends into the inner cavity of the constant temperature box.

[0011] Furthermore, at least one layer of a test platform for placing the inertial measurement unit to be calibrated is provided on at least a portion of the connecting shafts;

[0012] Each layer of test platforms on at least one layer of test platforms is fixedly connected by a plurality of supporting guide columns.

[0013] Furthermore, at least one level is provided on the upper surface of each test platform of at least one layer of the test platform;

[0014] At least one nut for leveling the test platform is arranged within a preset distance from each level of the at least one level, and each of the at least one nut is arranged on the layer of the test platform.

[0015] Furthermore, a partition for maintaining a uniform temperature in the inner cavity of the thermostat is provided on at least one side of the inner cavity of the thermostat.

[0016] Furthermore, the inner cavity of the thermostat is provided with a temperature control device for detecting temperature and controlling the operation of the external unit.

[0017] Furthermore, an observation window for observing the inner cavity of the thermostat is provided on the shell of the thermostat.

[0018] Furthermore, an operating interface for setting the temperature is also provided on the shell of the thermostat.

[0019] Furthermore, the shell of the thermostat is also provided with at least one temperature-controlled air outlet for discharging air from the inner cavity of the thermostat.

[0020] The present invention provides a temperature calibration device for an inertial measurement unit, which consists of a constant temperature box, an air duct and an external unit. The constant temperature box shell is provided with a temperature control air inlet, the external unit shell is provided with a constant temperature air outlet and at least one air inlet, and the air duct connects the temperature control air inlet and the constant temperature air outlet. The internal cavity of the external unit is equipped with a heating device, a cooling device and an air blowing device. External air enters the internal cavity of the external unit through the air inlet, and the temperature is adjusted by the heating device and / or the cooling device. The adjusted air is sent into the air duct by the air blowing device through the constant temperature air outlet, and then sent into the internal cavity of the constant temperature box by the air duct through the temperature control air inlet. The temperature calibration device provided by the present invention not only significantly reduces the impact of external vibration and interference on the calibration of the inertial measurement unit, but also improves the uniformity of the temperature inside the temperature box, ensuring the structural stability of the test platform and the precise adjustment of the posture.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of a temperature calibration device for an inertial measurement unit provided by an embodiment of the present utility model;

[0024] Figure 2 This is a schematic structural diagram of the inner cavity of the thermostat provided by an embodiment of the present utility model;

[0025] Figure 3 It is a structural diagram of a stabilizing platform and a testing platform provided by an embodiment of the present utility model;

[0026] Figure 4 It is a top view of the test platform provided by an embodiment of the utility model.

[0027] Icons: 1-Constant temperature box; 2-Air duct; 3-Outdoor unit; 4-Stabilizing platform; 5-Connecting shaft; 6-Test platform; 7-Support guide column; 8-Level; 9-Nut; 11-Housing of constant temperature box; 12-Inner cavity of constant temperature box; 13-Partition; 14-Observation window; 15-Operation interface; 16-Temperature control air outlet; 17-Inlet and outlet of wires; 18-Handle; 19-Hinge; 111-Support device; 112-Wheels of constant temperature box; 31-Housing of external unit; 32-Constant temperature air outlet; 33-Air inlet; 34-Inner cavity of external unit; 35-Refrigeration device; 36-Blowing device; 37-Wheels of external unit; 41-Foot pad. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. Terms such as "upper," "lower," "inner," "outer," "left," and "right" indicate positions or relationships based on the positions or relationships shown in the figures, or the positions or relationships in which the utility model is typically placed when in use, or the positions or relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the utility model and to simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the utility model. Terms such as "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Without further constraints, an element defined by the phrase "comprises a..." does not preclude the existence of additional identical elements in the process, method, article or apparatus that includes the element.

[0030] It should also be noted that, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1 , Figure 1 This is one of the structural schematic diagrams of a temperature calibration device for an inertial measurement unit provided by an embodiment of the present utility model.

[0033] like Figure 1As shown in , the temperature calibration device includes: a constant temperature box 1, an air duct 2, and an outdoor unit 3. The shell 11 of the constant temperature box 1 is provided with a temperature control air inlet, and the shell 31 of the outdoor unit 3 is provided with a constant temperature air outlet 32 ​​and at least one air inlet 33. The air duct 2 is connected between the temperature control air inlet and the constant temperature air outlet 32. The inner cavity 34 of the outdoor unit 3 is provided with a heating device, a cooling device 35, and a blowing device 36. Among them, external air enters the inner cavity 34 of the outdoor unit 3 through the air inlet 33, and the air temperature in the inner cavity 34 of the outdoor unit 3 is adjusted by the heating device and / or the cooling device 35. The adjusted air is then sent into the air duct 2 through the constant temperature air outlet 32 ​​by the blowing device 36. The adjusted air is then sent into the inner cavity 12 of the constant temperature box 1 by the air duct 2 through the temperature control air inlet.

[0034] In this embodiment, the heating device may be a heating plate, heating wire, or other device, which is not limited here. The refrigeration device 35 may be a compressor, which is not limited here. The air blowing device 36 includes a blower and a power device, which may be a motor, which is not limited here. The blower is fixedly connected to the constant temperature air outlet 32.

[0035] In this embodiment, the heating device is used to heat the air, and the cooling device 35 is used to cool the air. When the two devices work together or independently, air at a desired temperature can be obtained.

[0036] like Figure 1 As shown in , further, a stabilizing platform 4 is provided at the bottom of the shell 11 of the thermostat 1 .

[0037] Here, the stable platform 4 has the characteristics of being heavy and stable. The stable platform 4 can be a marble platform, which is not limited here.

[0038] See also Figure 2 , Figure 2 It is a schematic structural diagram of the inner cavity of the constant temperature box provided in an embodiment of the present utility model.

[0039] like Figure 2 As shown in , further, at least one side of the inner cavity 12 of the thermostat 1 is provided with a partition 13 for maintaining a uniform temperature of the inner cavity 12 of the thermostat 1 .

[0040] In this embodiment, the partition 13 is a honeycomb partition. Honeycomb partitions are provided on both sides of the inner cavity 12 of the thermostat 1 to ensure that during the temperature calibration process, the upper and lower layers of the inner cavity 12 of the thermostat 1 can achieve a uniform temperature. The honeycomb partition has the function of increasing the air flow path in the inner cavity 2 of the thermostat 1, thereby promoting a more even distribution of air in the upper and lower layers of the inner cavity 2 of the thermostat 1. When the air flows through the honeycomb-shaped partition, it will be divided into many small air flows, and the air can achieve a more uniform flow state in the inner cavity 2 of the thermostat 1, thereby effectively reducing the temperature difference between the upper and lower layers, improving the temperature uniformity, and providing a reliable guarantee for the quality and performance of the product.

[0041] See also Figure 3 , Figure 3 It is a structural schematic diagram of a stabilizing platform and a testing platform provided by an embodiment of the utility model.

[0042] like Figure 3 As shown in FIG, further, a foot pad 41 for shockproofing is provided in a preset area at the bottom of the stabilizing platform 4.

[0043] In this embodiment, six foot pads 41 are provided at the bottom of the stabilizing platform 4 near the edge. The foot pads 41 have a shockproof function and are height-adjustable, which can further reduce the impact of environmental factors such as vibration and uneven ground on the calibration data.

[0044] like Figure 3 As shown in , further, a connecting shaft 5 is fixed above the stabilizing platform 4 , and at least a portion of the connecting shaft 5 passes through the bottom of the shell 11 of the thermostat 1 and extends into the inner cavity 12 of the thermostat 1 .

[0045] like Figure 3 As shown in , further, at least a portion of the connecting shaft 5 is provided with at least one test platform 6 for placing the inertial measurement unit to be calibrated.

[0046] like Figure 3 As shown in , further, each layer of test platforms 6 on at least one layer of test platforms 6 is fixedly connected by a plurality of support guide pillars 7.

[0047] In this embodiment, each layer of the test platforms 6 on at least one layer of the test platforms 6 is fixedly connected via four support guide pillars 7. The support guide pillars 7 provide a firm support force for the platform, ensuring the stability of the platform.

[0048] See also Figure 4 , Figure 4 It is a top view of the test platform provided by an embodiment of the utility model.

[0049] like Figure 4As shown in the figure, further, at least one level 8 is provided on the upper surface of each test platform 6 of at least one layer of test platforms 6; at least one nut 9 for leveling the test platform 6 is provided within a preset distance from each level 8 of the at least one level 8, and each nut 9 of the at least one nut 9 is provided on the test platform 6 of that layer.

[0050] In this embodiment, a level 8 is installed at each corner of the upper surface of each test platform 6. A nut 9 is located near each level 8 to detect the horizontality of the test platform 6. The nuts 9 also adjust the posture of the test platform 6, thereby ensuring that the test platform 6 reaches a horizontal state, providing a precise foundation for testing. Each of the multiple support guide posts 7 is secured to at least one test platform 6 layer by at least one nut 9.

[0051] Furthermore, the inner cavity 12 of the thermostatic box 1 is provided with a temperature control device for detecting the temperature and controlling the operation of the external unit 3 , so that the desired temperature is maintained in the thermostatic box 1 .

[0052] like Figure 1 As shown in , further, the shell 11 of the thermostat 1 is also provided with an observation window 14 for observing the conditions of the inner cavity 12 of the thermostat 1. Here, the conditions of the inner cavity 12 of the thermostat 1 may include but are not limited to: whether there are foreign objects in the inner cavity 12, whether the equipment in the inner cavity 12 is operating normally, and whether there is abnormal condensation in the inner cavity 12. The shell 11 of the thermostat 1 is also provided with an operation interface 15 for setting the temperature, and the operation interface 15 can display the air temperature of the inner cavity 12 of the thermostat 1. The shell 11 of the thermostat 1 is also provided with at least one temperature-controlled air outlet 16 for discharging the air in the inner cavity 12 of the thermostat 1. Here, when the air in the inner cavity 12 of the thermostat 1 needs to be updated or the temperature adjustment needs to discharge part of the air, the temperature-controlled air outlet 16 serves to discharge the air in the inner cavity 12 of the thermostat 1 to the external environment. The shell 11 of the thermostat 1 is also provided with an inlet and outlet 17 for connecting lines. The housing 11 of the incubator 1 is also provided with a handle 18 and at least one hinge 19 for opening the door of the incubator 1. The bottom of the housing 11 of the incubator 1 is also provided with multiple support devices 111, and the stabilizing platform 4 is located between the multiple support devices 111. Each of the multiple support devices 111 has wheels 112 for movement in a predetermined area at the bottom.

[0053] like Figure 1 As shown in , further, a preset area at the bottom of the housing 31 of the external unit 3 is provided with wheels 37 for movement.

[0054] In this embodiment, during the temperature calibration process of the inertial measurement unit, the vibration generated by the equipment (such as the compressor, motor, etc.) and external interference may affect the accuracy of the temperature calibration. Separating the vibration source from the test platform 6 can minimize the adverse effects of vibration on the temperature calibration of the inertial measurement unit, thereby improving the accuracy of the temperature calibration. In this application, a split structure of the thermostat 1 and the external unit 3 is adopted to isolate the thermostat 1 from the external unit 3 to reduce the impact of vibration of components such as the compressor and motor in the external unit 3 on the calibration process.

[0055] The utility model provides a temperature calibration device for an inertial measurement unit, which not only significantly reduces the influence of external vibration and interference on the calibration of the inertial measurement unit, but also improves the uniformity of the temperature inside the temperature chamber, ensuring the structural stability of the test platform and the precise adjustment of the posture.

[0056] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that the technical solutions described in the aforementioned embodiments may be modified or some or all of the technical features therein may be replaced with equivalents. Such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the various embodiments of the present invention. Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features but not other features included in other embodiments, the combination of features from different embodiments is intended to be within the scope of the present invention and to form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is intended solely to enhance understanding of the overall background technology of the present invention and should not be construed as an admission or any form of implication that such information constitutes prior art already known to those skilled in the art.

Claims

1. A temperature calibration device for an inertial measurement unit, characterized in that: The temperature calibration equipment includes: a constant temperature box, an air duct and an outdoor unit; The shell of the thermostat is provided with a temperature control air inlet, the shell of the external unit is provided with a constant temperature air outlet and at least one air inlet, an air duct is connected between the temperature control air inlet and the constant temperature air outlet, and the inner cavity of the external unit is provided with a heating device, a cooling device and a blowing device; Among them, the external air enters the inner cavity of the outdoor unit through the air inlet, and the air temperature in the inner cavity of the outdoor unit is adjusted by the heating device and / or the refrigeration device. The regulated air is sent into the air duct by the blowing device through the constant temperature air outlet, and then the air duct sends the regulated air into the inner cavity of the constant temperature box through the temperature control air inlet.

2. The temperature calibration device according to claim 1, characterized in that: A stable platform is provided at the bottom of the shell of the thermostat; The bottom preset area of ​​the stable platform is provided with foot pads for shock absorption.

3. The temperature calibration device according to claim 2, characterized in that: A connecting shaft is fixed above the stabilizing platform, and at least a portion of the connecting shaft passes through the bottom of the shell of the constant temperature box and extends into the inner cavity of the constant temperature box.

4. The temperature calibration device according to claim 3, characterized in that: At least one layer of test platform for placing the inertial measurement unit to be calibrated is provided on at least a portion of the connecting shafts; Each layer of test platforms on at least one layer of test platforms is fixedly connected by a plurality of supporting guide columns.

5. The temperature calibration device according to claim 4, characterized in that: The upper surface of each test platform of at least one layer of the test platform is provided with at least one level; At least one nut for leveling the test platform is arranged within a preset distance from each level of the at least one level, and each of the at least one nut is arranged on the layer of the test platform.

6. The temperature calibration device according to claim 1, characterized in that: At least one side of the inner cavity of the thermostat is provided with a partition for maintaining a uniform temperature in the inner cavity of the thermostat.

7. The temperature calibration device according to claim 1, characterized in that: The inner cavity of the constant temperature box is provided with a temperature control device for detecting temperature and controlling the operation of the external unit.

8. The temperature calibration device according to claim 1, characterized in that: The shell of the thermostat is also provided with an observation window for observing the inner cavity of the thermostat.

9. The temperature calibration device according to claim 1, characterized in that: An operating interface for setting the temperature is also provided on the shell of the thermostat.

10. The temperature calibration device according to claim 1, characterized in that: The shell of the thermostat is also provided with at least one temperature-controlled air outlet for discharging air from the inner cavity of the thermostat.

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