Inertial measurement assembly and mobile device

Abstract

The utility model provides a kind of inertial measurement assembly and mobile device, including installation shell, side cover and sensitive device, installation shell has top installation cavity and side installation cavity, the opening of top installation cavity is upward, side installation cavity is located in the side of top installation cavity, and opening is towards the outer periphery of installation shell, top installation cavity and side installation cavity are interconnected;Side cover is used to block the side opening of side installation cavity;Sensitive device is located in top installation cavity or side installation cavity inside.The utility model provides a kind of inertial measurement assembly, by making top installation cavity and side installation cavity be interconnected, integrated filling space is formed, the synchronous filling of all sensitive devices in each installation cavity is realized, and it is convenient for operator to exert normal pressure to cavity sensitive device from outside, ensure assembly accuracy, improve filling efficiency;And can effectively avoid the formation of local cavity, provide more reliable protection for sensitive device.

Description

Technical Field

[0001] This utility model belongs to the field of inertial navigation technology, specifically relating to an inertial measurement component and a mobile device. Background Technology

[0002] As a key component of core devices such as inertial navigation systems and attitude measurement equipment, the inertial measurement unit (IMU) is responsible for sensing the angular velocity and acceleration parameters of a moving vehicle along the X, Y, and Z axes in a three-dimensional spatial coordinate system. The IMU consists of a hexahedral base and multiple sensing elements, which are mounted in pairs orthogonal configurations on the hexahedral base to ensure accurate capture of the motion parameters along the three axes.

[0003] In practical applications of inertial measurement units, they often need to withstand instantaneous large impact loads of tens of thousands of g (g is the acceleration due to gravity, 1g≈9.8m / s²). To prevent performance drift or even structural damage to sensitive components under such extreme conditions, the industry typically uses a potting process to encapsulate and protect sensitive components, using the cured adhesive layer to achieve impact buffering and environmental isolation.

[0004] In existing technologies, sensitive components are respectively disposed on the outer peripheral surface of a hexahedral base, with each sensitive component corresponding to an independent mounting cavity, and the cavities are isolated from each other. Because the potting compound itself is fluid, it is impossible to pot the cavities in different directions simultaneously; they must be potted one by one, significantly reducing potting efficiency. Furthermore, the flow of the adhesive within each sealed small cavity is obstructed, easily forming local voids, directly compromising the integrity of the protective structure, leading to protection failure, and failing to provide reliable protection for the sensitive components. Utility Model Content

[0005] This utility model provides an inertial measurement component and a mobile device, aiming to solve the technical problems of low efficiency and easy formation of local voids during potting in the prior art, which cannot provide reliable protection for sensitive components.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: Firstly, an inertial measurement unit is provided, comprising: The mounting housing has a top mounting cavity and a side mounting cavity. The opening of the top mounting cavity faces upward, and the side mounting cavity is located on the side of the top mounting cavity with its opening facing the outer periphery of the mounting housing. The top mounting cavity and the side mounting cavity are in communication with each other. Side cover, used to seal the side opening of the side mounting cavity; and The sensitive device is disposed in the top mounting cavity or the side mounting cavity.

[0007] The beneficial effects of the inertial measurement unit provided by this utility model are as follows: Compared with the prior art, the inertial measurement unit of this utility model forms an integrated potting space by connecting the top mounting cavity and the side mounting cavity. On the one hand, the glue can be potted from top to bottom through the upper opening of the top mounting cavity, realizing the synchronous potting of all sensitive devices in each mounting cavity, which greatly shortens the potting cycle and significantly improves production efficiency. On the other hand, the connected cavity space is more open, and the flowability of the glue is fully guaranteed, which can smoothly fill the gap between the sensitive device and the cavity wall, the corner of the cavity, and other key areas, effectively avoiding the formation of local voids or bubbles, and providing more reliable protection for the sensitive device.

[0008] Based on this, the side cover needs to be connected to the mounting housing only after the sensing device is installed in the side mounting cavity. This allows the opening of the side mounting cavity to be fully exposed during sensing device installation, optimizing the installation and operation space for the sensing device. It facilitates the operator applying normal pressure to the sensing device from the outside, ensuring reliable positioning and installation, avoiding orthogonality deviation caused by uneven force application, and guaranteeing the measurement accuracy of the inertial measurement unit. The top mounting cavity opening faces upwards, also providing the aforementioned operational convenience. After each sensing device is fixed, the opening of the side mounting cavity is sealed with the side cover, forming an effective potting space and improving potting efficiency.

[0009] In conjunction with the first aspect, in one possible implementation, the top mounting cavity includes a first positioning groove and a first receiving groove that are interconnected. The first receiving groove is disposed on the bottom wall of the first positioning groove. The bottom wall of the first positioning groove is used to position the circuit board of the sensitive device in the vertical direction. The first receiving groove is used to receive the sensitive part of the sensitive device. The side mounting cavity includes a second positioning groove and a second receiving groove that are interconnected. The second receiving groove is disposed on the inner wall of the second positioning groove. The inner wall of the second positioning groove is used to position the circuit board of the sensitive device in a direction perpendicular to the vertical direction. The second receiving groove is used to receive the sensitive part of the sensitive device.

[0010] In some embodiments, a guide structure is provided in the side mounting cavity, the guide structure being used to guide the sensitive part of the sensitive device into the second receiving groove in a direction perpendicular to the vertical direction.

[0011] In some embodiments, the guiding structure is a guide strip disposed on the inner wall of the second positioning groove, the guide strip extending outward; the sensitive device is provided with a guide groove, the guide groove slidingly engaging with the guide strip.

[0012] In some embodiments, four side mounting cavities are provided, and the four side mounting cavities are respectively provided on the four side walls of the mounting housing; the four side walls of the mounting housing each have an extension, and the four extensions enclose an adhesive space located above the top mounting cavity, and the top mounting cavity and the four side mounting cavities are respectively connected to the adhesive space.

[0013] In some embodiments, the mounting housing is provided with a flow channel for connecting the adhesive space and the first receiving groove.

[0014] In some embodiments, the flow channel is a flow guide groove provided on the peripheral sidewall of the first positioning groove, and the flow guide groove extends downward to the bottom wall of the first receiving groove.

[0015] In some embodiments, there are six sensitive devices, with four of the sensitive devices being disposed one-to-one in the four side mounting cavities, and two of the sensitive devices being disposed back-to-back in the top mounting cavity.

[0016] In conjunction with the first aspect, in one possible implementation, the side wall of the mounting housing is provided with a mounting groove, and the side cover is connected to the mounting groove.

[0017] Secondly, this utility model embodiment also provides a mobile device, including the aforementioned inertial measurement component.

[0018] The beneficial effects of the mobile device provided in this application embodiment are the same as those of the aforementioned inertial measurement component, and will not be repeated here. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of an inertial measurement assembly provided in an embodiment of this utility model; Figure 2 A schematic diagram of the structure of the mounting housing provided in an embodiment of this utility model; Figure 3 A schematic diagram of a hidden side cover for an inertial measurement unit provided in an embodiment of this utility model; Figure 4 A cross-sectional view (including top cover) of an inertial measurement unit after potting is completed, as provided in an embodiment of this utility model. Figure 5 A schematic diagram of the structure of the sensitive device provided in an embodiment of this utility model.

[0021] The following are the labeling elements in the figure: 1. Mounting housing; 11. Top mounting cavity; 111. First positioning groove; 112. First receiving groove; 12. Side mounting cavity; 121. Second positioning groove; 122. Second receiving groove; 13. Guide strip; 14. Adhesive space; 15. Flow guide groove; 16. Mounting groove; 17. Extension; 2. Side cover; 3. Sensitive device; 31. Sensitive part; 32. Circuit board; 321. Guide groove; 4. Top cover. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "height," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0025] Please refer to the following: Figures 1 to 5 The present invention provides an inertial measurement unit and a mobile device. The inertial measurement unit includes a mounting housing 1, a side cover 2, and a sensing device 3. The mounting housing 1 has a top mounting cavity 11 and a side mounting cavity 12. The opening of the top mounting cavity 11 faces upwards, and the side mounting cavity 12 is located on the side of the top mounting cavity 11, with its opening facing the outer periphery of the mounting housing 1. The top mounting cavity 11 and the side mounting cavity 12 are interconnected. The side cover 2 is used to seal the side opening of the side mounting cavity 12. The sensing device 3 is disposed within either the top mounting cavity 11 or the side mounting cavity 12.

[0026] The inertial measurement unit provided in this embodiment, compared with the prior art, forms an integrated potting space by connecting the top mounting cavity 11 and the side mounting cavity 12. On the one hand, the top mounting cavity 11 can be filled from top to bottom through the upper opening, realizing the synchronous potting of all sensitive devices 3 in each mounting cavity, which greatly shortens the potting cycle and significantly improves production efficiency. On the other hand, the connected cavity space is more open, and the flowability of the adhesive is fully guaranteed, which can smoothly fill the gap between the sensitive device 3 and the cavity wall, the corner of the cavity, and other key areas, effectively avoiding the formation of local voids or bubbles, and providing more reliable protection for the sensitive device 3.

[0027] Based on this, the side cover 2 needs to be connected to the mounting housing 1 after the sensitive device 3 is installed in the side mounting cavity 12. In this way, when installing the sensitive device 3, the side opening of the side mounting cavity 12 can be fully exposed, optimizing the installation and operation space of the sensitive device 3 on the side. This makes it easier for the operator to apply normal pressure to the sensitive device 3 inside the cavity from the outside, ensuring reliable positioning and installation of the sensitive device 3. This avoids orthogonal deviation of the sensitive device 3 caused by uneven force application, thus ensuring the measurement accuracy of the inertial measurement unit. The top mounting cavity 11 opens upwards, also providing the aforementioned good operational convenience. After each sensitive device 3 is fixed, the opening of the side mounting cavity 12 is sealed by the side cover 2, forming an effective potting space and improving potting efficiency.

[0028] It should be noted that the sensitive device 3 includes a sensitive part 31 and a circuit board 32, with the sensitive part 31 connected to one side of the circuit board 32. Before potting, the sensitive device 3 is usually pre-fixed in the mounting cavity using adhesive to prevent the sensitive part 31 from shifting position during subsequent potting. When attaching the sensitive device 3, pressure perpendicular to the surface of the circuit board 32 (i.e., normal pressure) must be applied to the sensitive device 3 and maintained for a certain period of time to ensure that the sensitive device 3 is firmly fixed in each mounting cavity in the set posture. This ensures the orthogonality accuracy of the sensitive device 3 installation, which is a core prerequisite for ensuring the measurement accuracy of the inertial measurement unit.

[0029] In existing technologies, to achieve synchronous potting of all sensitive components, some designs arrange all sensitive components within the internal cavity of a hexahedral base. Compared to arranging them on the outer periphery, this structure can achieve overall potting of all sensitive components by filling the internal cavity of the hexahedral base with adhesive. However, since the overall size of inertial measurement units is usually small, the operating space of its internal cavity is extremely limited. This makes it difficult for operators to apply precise and stable normal pressure to the sensitive components within the cavity, thus failing to guarantee the orthogonality of the sensitive components and ultimately affecting the measurement accuracy of the inertial measurement unit.

[0030] In this embodiment, the side mounting cavity 12 with its outward opening cooperates with the side cover 2, which not only allows the operator to apply normal pressure to the sensitive device 3 from the outside before installing the side cover 2, ensuring the orthogonality of the installation, but also allows the top mounting cavity 11 and the side mounting cavity 12 to form an effective connected potting space after installing the side cover 2, realizing the synchronous potting of all sensitive devices 3 and improving the potting efficiency.

[0031] The side cover 2 can be connected to the mounting housing 1 by means of adhesive bonding, laser welding, or fastener connection, with detachable fastener connection, such as screw connection, being preferred. This detachable connection between the side cover 2 and the mounting housing 1 provides the inertial measurement unit (IMU) with good maintenance flexibility. During the use of the IMU, if a sensitive device 3 malfunctions, it is not necessary to disassemble the entire unit or damage the potting compound; simply removing the corresponding side cover 2 allows for inspection, repair, or replacement of the sensitive device 3 within the side mounting cavity 12. After potting, a top cover 4 is installed on the top surface of the mounting housing 1 to seal the upper opening of the top mounting cavity 11. The top cover 4 is also detachably connected to the mounting housing 1, providing convenient maintenance for the sensitive device 3 on the top.

[0032] The sensing element 31 of the sensing device 3 can be an accelerometer or a gyroscope. The accelerometer is used to measure the linear acceleration of the moving vehicle, and its core function is to sense changes in speed and the direction of force. The gyroscope is used to measure the angular acceleration or angular velocity of the moving vehicle, and its core function is to sense changes in rotation and attitude stability. The circuit board 32 is used to receive and process the measurement signals from the sensing element 31, and at the same time provide a stable power supply.

[0033] Specifically, at least one sensitive device 3 should be provided, which can be an integrated inertial measurement device (such as a MEMS integrated IMU, an integrated device that has both angular velocity and acceleration measurement functions). In this case, the device can be directly installed in the top mounting cavity 11 for easy installation and calibration.

[0034] Optionally, the sensing devices 3 can be configured as three or six: When configured as three, the three sensing devices 3 correspond to the single axes of X, Y, and Z respectively, with one installed in the top mounting cavity 11 (corresponding to the Z-axis) and the other two installed in two orthogonal side mounting cavities 12 (corresponding to the X-axis and Y-axis respectively), ensuring that the measurement directions of each sensing device 3 are pairwise orthogonal. When configured as six, two are set in each axis to sense the angular velocity and acceleration of that axis respectively, jointly achieving comprehensive perception of spatial three-dimensional motion parameters.

[0035] The number of side mounting cavities 12 can match the number of sensitive devices 3 located on the side, or it can be more than the number of sensitive devices 3 located on the side, to provide expansion space.

[0036] In some embodiments, see Figure 2 and Figure 4 The top mounting cavity 11 includes a first positioning groove 111 and a first receiving groove 112 that are interconnected. The first receiving groove 112 is disposed on the bottom wall of the first positioning groove 111. The bottom wall of the first positioning groove 111 is used to position the circuit board 32 of the sensitive device 3 in the vertical direction. The first receiving groove 112 is used to receive the sensitive part 31 of the sensitive device 3. The side mounting cavity 12 includes a second positioning groove 121 and a second receiving groove 122 that are interconnected. The second receiving groove 122 is disposed on the inner wall of the second positioning groove 121. The inner wall of the second positioning groove 121 is used to position the circuit board 32 of the sensitive device 3 in the direction perpendicular to the vertical direction. The second receiving groove 122 is used to receive the sensitive part 31 of the sensitive device 3.

[0037] Taking the top mounting cavity 11 as an example, firstly, apply glue to the bottom wall of the first positioning groove 111 and the corresponding part of the circuit board 32. Then, make the sensitive part 31 of the sensitive device 3 face the first receiving groove 112 and smoothly place the sensitive device 3 into the top mounting cavity 11. The circuit board 32 is embedded in the first positioning groove 111 and bonded to the bottom wall of the first positioning groove 111. The bottom wall of the first positioning groove 111 is used to achieve rigid positioning of the circuit board 32. At this time, the operator needs to apply downward normal pressure to the sensitive device 3 from above to ensure that the bonding is firm. At the same time, the sensitive part 31 enters the first receiving groove 112, completing the fixed installation of the sensitive device 3 and the top mounting cavity 11.

[0038] The installation process of the side mounting cavity 12 is the same as that of the top mounting cavity 11. Only care must be taken to apply lateral pressure to the sensitive device 3 on the side to ensure it is orthogonal to the sensitive device 3 on the top. The above-described structure of the top mounting cavity 11 and the side mounting cavity 12 simplifies the assembly process, reduces operational difficulty, and simultaneously improves positioning accuracy and ensures measurement performance.

[0039] In some embodiments, a guide structure is provided within the side mounting cavity 12. This guide structure guides the sensitive part 31 of the sensitive device 3 into the second receiving groove 122 in a direction perpendicular to the vertical direction. This further reduces the installation difficulty and avoids collision damage to the sensitive part 31, improving assembly efficiency and accuracy. Specifically, the guide structure can be an inclined guide surface structure or a combination of guide ribs and guide grooves. The structure is simple and suitable for smaller mounting housings 1.

[0040] For some specific embodiments, please refer to Figure 2 , Figure 3 and Figure 5 The guiding structure is a guide bar 13 provided on the inner wall of the second positioning groove 121, and the guide bar 13 extends outward; the sensitive device 3 is provided with a guide groove 321, and the guide groove 321 slides in cooperation with the guide bar 13.

[0041] It is understood that in this embodiment, "inner" refers to the side facing the center of the mounting housing 1, and "outer" refers to the side away from the center of the mounting housing 1. The guide strip 13 is connected to the inner wall of the second positioning groove 121 and extends outward along the peripheral sidewall of the second positioning groove 121. The guide strip 13 can be processed and formed simultaneously with the second positioning groove 121, or it can be connected to the second positioning groove 121 by welding or bonding. The guide groove 321 on the sensitive device 3 is provided on the circuit board 32. Multiple guide strips 13 can be provided at intervals along the peripheral sidewall of the second positioning groove 121; correspondingly, multiple guide grooves 321 are also provided to increase the guiding area.

[0042] During installation, align the guide groove 321 of the sensitive device 3 with the outer end of the guide strip 13, and slide it along the guide strip 13 into the side mounting cavity 12. This allows the sensitive part 31 to enter the second receiving groove 122 in an orthogonal posture to other sensitive parts 31 in the mounting cavity, eliminating the need for repeated manual calibration. This is particularly suitable for lateral operation scenarios in the side mounting cavity 12, improving assembly convenience. Furthermore, during glue application, the cooperation of the guide groove 321 and the guide strip 13 helps to limit the position of the sensitive device 3, preventing it from tilting due to glue application pressure and ensuring the axial accuracy of the sensitive part 31.

[0043] In some embodiments, please refer to Figure 1 and Figure 2 There are four side mounting cavities 12, which are respectively provided on the four side walls of the mounting housing 1. The four side walls of the mounting housing 1 each have an extension 17, which together form an adhesive space 14 above the top mounting cavity 11. The top mounting cavity 11 and the four side mounting cavities 12 are respectively connected to the adhesive space 14.

[0044] Side mounting cavities 12 are provided on all four side walls of the mounting housing 1, providing sufficient mounting space for the sensitive device 3. The symmetrical distribution of the four side mounting cavities 12 also helps ensure the pairwise orthogonality of the sensitive device 3 during installation. Correspondingly, four side covers 2 are also provided to seal the side openings of the four side mounting cavities 12 respectively.

[0045] Four extensions 17 are located around the top mounting cavity 11, making the projected area of ​​the adhesive space 14 larger than that of the top mounting cavity 11. Four side mounting cavities 12 are located around the top mounting cavity 11 and are connected to the adhesive space 14. After the four side covers 2 seal the side mounting cavities 12, the four side mounting cavities 12, the top mounting cavity 11, and the upper adhesive space 14 are connected to form an effective potting space, facilitating overall potting.

[0046] The potting compound space 14 serves as a shared connecting cavity between the top mounting cavity 11 and the four side mounting cavities 12. This allows the potting compound to be injected in one go from the top surface potting compound space 14 and naturally fill all the side mounting cavities 12. Simultaneously, it prevents the potting compound from overflowing and contaminating the outer wall of the mounting housing 1, thus improving potting efficiency. Furthermore, the expanded design of the potting compound space 14 enhances the flowability of the adhesive, effectively preventing localized voids and providing reliable protection for the sensitive device 3.

[0047] In some possible embodiments, the mounting housing 1 is provided with a flow channel for connecting the adhesive space 14 and the first receiving groove 112.

[0048] The flow channel can precisely guide the potting compound in the potting space 14 into the first receiving groove 112, preventing the circuit board 32 of the sensitive device 3 from sticking to the first positioning groove 111 and blocking the flow of the potting compound. This ensures that the first receiving groove 112 below can also be filled with full and void-free adhesive, improving the reliability of protection for the sensitive part 31.

[0049] Specifically, the flow channel can be an inclined flow channel extending from the bottom wall of the adhesive space 14 to the side wall of the first receiving tank 112, or multiple evenly distributed flow holes, to ensure that the adhesive fully enters the first receiving tank 112.

[0050] For example, please see Figure 2 The flow channel is a flow guide groove 15 located on the periphery of the first positioning groove 111, and the flow guide groove 15 extends downward to the bottom wall of the first receiving groove 112. The flow guide groove 15 has an arc-shaped groove structure and there are four of them. The four flow guide grooves 15 are respectively located at the four corners of the first positioning groove 111 to ensure that the adhesive can enter the first receiving groove 112 evenly.

[0051] The above structure is simple, and the four guide grooves 15 can be processed and formed simultaneously with the top mounting cavity 11. The processing difficulty is low, which can guide the potting compound to fill into the first receiving groove 112 smoothly and evenly without increasing the manufacturing cost.

[0052] In some embodiments, see Figure 1 and Figure 4 There are six sensitive devices 3, four of which are installed in the four side mounting cavities 12 one to one, and two sensitive devices 3 are installed back to back in the top mounting cavity 11.

[0053] In this embodiment, to ensure measurement accuracy, six sensing devices 3 are provided. Three of these sensing devices 3 have gyroscopes as their sensing elements 31, and the other three have accelerometers as their sensing elements 31. The gyroscopes and accelerometers are arranged one-to-one with each other. For example, a gyroscope is installed in the front side mounting cavity 12, and an accelerometer is installed in the rear side mounting cavity 12, enabling the sensing of the target carrier's acceleration and angular velocity in the front-to-back direction (X-axis). A gyroscope is installed in the left side mounting cavity 12, and an accelerometer is installed in the right side mounting cavity 12, enabling the sensing of the target carrier's acceleration in the left-to-right direction (Y-axis). To achieve synchronous encapsulation of each sensitive device 3, no mounting cavity is provided on the bottom surface of the mounting housing 1. Therefore, the remaining gyroscope and accelerometer can be placed back-to-back in the top mounting cavity 11. Here, back-to-back means that the circuit boards 32 of the two sensitive devices 3 are attached together (adhesive can be used) and positioned in the first positioning groove 111. The gyroscope is located in the first receiving groove 112 and the accelerometer is located in the adhesive space 14, or the gyroscope is located in the adhesive space 14 and the accelerometer is located in the first receiving groove 112, so as to realize the acceleration and angular velocity sensing of the target carrier in the vertical direction (Z axis).

[0054] The arrangement of six sensing devices 3 ensures the accuracy and redundancy of three-dimensional parameter sensing, and improves the operational reliability of the inertial measurement unit. The two sensing devices 3 located back to back in the top mounting cavity 11 not only save space, but also allow the first receiving groove 112 and the adhesive space 14 to encapsulate the two sensing parts 31 with adhesive, ensuring reliable protection for the sensing devices 3.

[0055] In some embodiments, see Figure 1 and Figure 2 The side wall of the housing 1 is provided with a mounting groove 16, and the side cover 2 is connected to the mounting groove 16.

[0056] The mounting groove 16 provides precise positioning for the side cover 2, facilitating quick assembly of the side cover 2 and ensuring connection stability. The side cover 2 is embedded in the mounting groove 16, which also helps to reduce the overall volume of the inertial measurement unit and enhances the sealing performance of the side mounting cavity 12 to prevent potting compound leakage.

[0057] When the side cover 2 is connected to the mounting housing 1 by adhesive, the mounting groove 16 can also contain the adhesive, preventing the adhesive from overflowing and contaminating the outer wall of the mounting housing 1.

[0058] Based on the same inventive concept, embodiments of this application also provide a mobile device, including an inertial measurement component as proposed in any of the preceding claims.

[0059] The beneficial effects of the mobile device provided in this embodiment are the same as those of the aforementioned inertial measurement component, and will not be repeated here.

[0060] The mobile device in this embodiment can be a vehicle, drone, robot, or armored vehicle, etc. The inertial measurement unit is the core attitude perception and motion measurement unit of the above-mentioned mobile devices. It accurately captures the angular velocity and acceleration of the mobile device in the X, Y, and Z directions through several sensitive devices 3, providing real-time motion state data for the mobile device. The mobile device relies on this data to realize core functions such as attitude control and path planning.

[0061] Specifically, the mounting housing 1 can be connected to the mounting base of the mobile device using fasteners such as bolts and screws, thus connecting the inertial measurement unit (IMU) to the mobile device. During connection, it is essential to ensure that the mounting surface of the IMU is parallel or perpendicular to the reference plane of the mobile device, and that the orthogonal arrangement of the sensing devices 3 is consistent with the direction of motion of the mobile device, thereby guaranteeing the accuracy of data acquisition.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An inertial measurement assembly characterized by, include: The mounting housing (1) has a top mounting cavity (11) and a side mounting cavity (12). The opening of the top mounting cavity (11) faces upward, and the side mounting cavity (12) is located on the side of the top mounting cavity (11) and its opening faces the outer periphery of the mounting housing (1). The top mounting cavity (11) and the side mounting cavity (12) are in communication with each other. Side cover (2) for sealing the side opening of the side mounting cavity (12); as well as The sensitive device (3) is disposed in the top mounting cavity (11) or the side mounting cavity (12).

2. An inertial measurement unit as described in claim 1, characterized in that, The top mounting cavity (11) includes a first positioning groove (111) and a first receiving groove (112) that are interconnected. The first receiving groove (112) is disposed on the bottom wall of the first positioning groove (111). The bottom wall of the first positioning groove (111) is used to position the circuit board (32) of the sensitive device (3) in the vertical direction. The first receiving groove (112) is used to receive the sensitive part (31) of the sensitive device (3). The side mounting cavity (12) includes a second positioning groove (121) and a second receiving groove (122) that are interconnected. The second receiving groove (122) is disposed on the inner wall of the second positioning groove (121). The inner wall of the second positioning groove (121) is used to position the circuit board (32) of the sensitive device (3) in a direction perpendicular to the vertical direction. The second receiving groove (122) is used to receive the sensitive part (31) of the sensitive device (3).

3. An inertial measurement assembly as claimed in claim 2, wherein The side mounting cavity (12) is provided with a guide structure, which is used to guide the sensitive part (31) of the sensitive device (3) into the second receiving groove (122) in a direction perpendicular to the vertical direction.

4. An inertial measurement assembly as claimed in claim 3, wherein The guiding structure is a guide strip (13) provided on the inner wall of the second positioning groove (121), and the guide strip (13) extends outward; the sensitive device (3) is provided with a guide groove (321), and the guide groove (321) slides with the guide strip (13).

5. An inertial measurement assembly as claimed in claim 2, wherein, The side mounting cavities (12) are provided in four parts, and the four side mounting cavities (12) are respectively provided on the four side walls of the mounting housing (1); the four side walls of the mounting housing (1) are respectively provided with extensions (17), and the four extensions (17) surround to form an adhesive space (14) located above the top mounting cavity (11). The top mounting cavity (11) and the four side mounting cavities (12) are respectively connected to the adhesive space (14).

6. An inertial measurement unit as described in claim 5, characterized in that, The mounting housing (1) is provided with a flow channel, which is used to connect the adhesive space (14) and the first receiving groove (112).

7. An inertial measurement assembly as claimed in claim 6, wherein The flow channel is a flow guide groove (15) provided on the side wall of the first positioning groove (111), and the flow guide groove (15) extends downward to the bottom wall of the first receiving groove (112).

8. An inertial measurement assembly as claimed in claim 7, wherein The number of sensitive devices (3) is six, of which four sensitive devices (3) are disposed one-to-one in the four side mounting cavities (12), and two sensitive devices (3) are disposed back-to-back in the top mounting cavity (11).

9. An inertial measurement assembly according to any one of claims 1-8, characterized in that The mounting housing (1) has a mounting groove (16) on its side wall, and the side cover (2) is connected to the mounting groove (16).

10. A mobile device, characterized in that, Includes an inertial measurement unit as described in any one of claims 1-9.

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