Multi-stage sealed high-precision multi-axis inertial sensor for vehicle

Abstract

The utility model relates to the technical field of inertial sensors, and discloses a multi-stage sealed high-precision multi-axis inertial sensor for vehicles, which comprises a sensor shell and a metal base, a shell connecting pin is arranged at the bottom of the sensor shell, and limiting slots are arranged in the shell connecting pin and the metal base. A fixing insertion rod is inserted into the limiting insertion groove, and a clamping block groove is formed in the bottom of the metal base. According to the utility model, through the arrangement of the sealing connection structure, the shell connection pins at the bottom of the sensor shell are clamped with the metal base at the bottom of the mounting seat body, and the fixed insertion rods are inserted into the limiting insertion grooves formed in the peripheries of the shell connection pins and the metal base; a limiting clamping block in a clamping block groove formed in the bottom of the metal base stretches out and draws back through a telescopic spring, the limiting clamping block is clamped with a clamping groove in the bottom of a fixed insertion rod, the sensor shell is fixed to the outer portion of the installation base body, and therefore the sealing connection function is achieved.

Description

Technical Field

[0001] This utility model relates to the field of multi-axis inertial sensor technology, specifically a multi-stage sealed high-precision multi-axis inertial sensor for automotive applications. Background Technology

[0002] An inertial sensor is a type of sensor that primarily detects and measures acceleration, tilt, impact, vibration, rotation, and multi-degree-of-freedom motion. Mid-range MEMS inertial sensors, as industrial and automotive-grade products, are mainly used in automotive electronic stability systems (ESP or ESC), GPS-assisted navigation systems, automotive airbags, vehicle attitude measurement, etc. Multi-axis inertial sensors include accelerometers and angular velocity sensors, as well as their dual-axis and tri-axis combinations such as IMUs and AHRS.

[0003] Therefore, multi-axis inertial sensors are crucial components in vehicles, and their protection is paramount. Damage to a multi-axis inertial sensor can have significant consequences for the vehicle, particularly impacting safety. To address these issues, we propose a multi-stage sealed, high-precision multi-axis inertial sensor for automotive applications. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage sealed high-precision multi-axis inertial sensor for vehicles, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage sealed high-precision multi-axis inertial sensor for vehicles, comprising a sensor housing and a metal base. The bottom of the sensor housing is provided with a housing connecting foot. Limit slots are formed inside the housing connecting foot and the metal base. A fixing rod is inserted into the limit slot. A locking groove is formed at the bottom of the metal base. A telescopic spring is installed inside the locking groove. A limit locking block is connected to the outside of the telescopic spring. A locking groove is provided at the bottom of the fixing rod.

[0006] As a further technical solution of this utility model, the sensor housing is snapped into the metal base through the housing connecting foot at the bottom, and the fixing rod passes through the limiting slot opened inside the housing connecting foot and the metal base through the top of the housing connecting foot.

[0007] As a further technical solution of this utility model, the limiting block extends and retracts inside the block groove by means of a telescopic spring. There are two sets of the block groove, the telescopic spring and the limiting block. The bottom of the fixing rod is provided with a snap-fit ​​groove.

[0008] As a further technical solution of this utility model, a lamp housing is provided on the top of the sensor housing, a connection socket is provided on the right side of the sensor housing, a connection slot is inserted into the outside of the connection socket, a connection wire is connected to the right side of the connection slot, a mounting body is connected to the top of the metal base, a sensor body is installed on the outside of the mounting body, a flashing light is provided on the top of the sensor body, a flexible connecting strip is connected to the outside of the sensor body, and a mounting screw is inserted into the outside of the sensor body.

[0009] As a further technical solution of this utility model, the inner side of the sensor body is provided with heat-dissipating silicone, the inside of the mounting base is provided with heat-conducting columns, the inside of the metal base is provided with a base groove, and the inside of the base groove is filled with heat-dissipating sealant.

[0010] As a further technical solution of this utility model, the heat dissipation sealant fills the interior groove of the base opened inside the metal base at the bottom of the mounting body, the sensor body contacts the outer wall of the mounting body through the heat dissipation silicone, and the heat-conducting column penetrates the interior of the mounting body and the metal base.

[0011] As a further technical solution of this utility model, a flame-retardant plastic layer is provided on the outside of the sensor housing, an impact-resistant mesh layer is provided inside the flame-retardant plastic layer, and a wave-absorbing layer is attached to the inside of the flame-retardant plastic layer.

[0012] As a further technical solution of this utility model, the wave-absorbing layer is attached to the inner wall of the sensor housing, and the impact-resistant mesh layer is installed inside the sensor housing.

[0013] Compared with the prior art, the beneficial effects of this utility model are: this multi-stage sealed high-precision multi-axis inertial sensor for vehicles not only realizes the sealing connection function and the heat dissipation sealing function, but also realizes the shock and interference resistance function.

[0014] By setting a sealed connection structure, the present invention is beneficial in that: during use, the sensor housing covers the mounting base and the sensor body outside the mounting base, allowing the housing connecting foot at the bottom of the sensor housing to engage with the metal base at the bottom of the mounting base. Then, the fixing rod is inserted into the limiting slots opened inside the housing connecting foot and the metal base. The limiting block inside the locking slot at the bottom of the metal base extends and retracts through the telescopic spring, allowing the limiting block to engage with the locking slot at the bottom of the fixing rod, thus fixing the sensor housing to the outside of the mounting base and sealing the mounting base inside the sensor housing, thereby achieving the sealed connection function.

[0015] By setting a heat dissipation and sealing structure, the present invention is beneficial in that: during use, after applying heat dissipation silicone to the rear end of the sensor body and attaching it to the outside of the mounting base, the mounting screw is inserted into the sensor body and connected to the mounting base. The heat dissipation sealant is filled into the inner groove of the metal base at the bottom of the mounting base, allowing the heat of the sensor body to be transferred to the outside of the mounting base through the heat dissipation silicone. The heat is then transferred through the heat-conducting column inside the mounting base to the heat dissipation sealant in the mounting base, the metal base, and the inner groove of the metal base, thereby achieving the heat dissipation and sealing function.

[0016] By setting up an anti-impact and anti-interference structure, the advantages of this utility model are as follows: When in use, the main body of the sensor housing is made of a flame-retardant plastic layer. The flame-retardant plastic layer contains a flame retardant to prevent external combustion from damaging the sensor housing and the sensor inside the sensor housing. The anti-impact mesh layer set inside the flame-retardant plastic layer can increase the impact resistance of the sensor housing. The wave-absorbing layer attached to the inner wall of the flame-retardant plastic layer can be a shielding wave-absorbing patch, which increases the anti-interference of the sensor body inside the sensor housing, thereby realizing the anti-impact and anti-interference function. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the sensor housing of this utility model;

[0019] Figure 3 This is an enlarged cross-sectional schematic diagram of the metal base and the connecting foot of the housing of this utility model;

[0020] Figure 4 This is an enlarged cross-sectional structural diagram of the mounting base and metal base of this utility model;

[0021] Figure 5 This is a partial cross-sectional enlarged structural diagram of the sensor housing of this utility model.

[0022] In the diagram: 1. Sensor housing; 2. Lamp housing; 3. Metal base; 4. Connecting socket; 5. Connecting slot; 6. Connecting wire; 7. Housing connecting foot; 8. Flashing light; 9. Mounting base; 10. Sensor body; 11. Mounting screw; 12. Flexible connecting strip; 13. Wave-absorbing layer; 14. Impact-resistant mesh layer; 15. Flame-retardant plastic layer; 16. Fixing rod; 17. Locking slot; 18. Telescopic spring; 19. Limiting locking block; 20. Locking groove; 21. Limiting slot; 22. Heat-conducting column; 23. Heat-dissipating sealant; 24. Inner groove of the base; 25. Heat-dissipating silicone. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 An embodiment of this utility model is provided: a multi-stage sealed high-precision multi-axis inertial sensor for vehicles, including a sensor housing 1 and a metal base 3. The bottom of the sensor housing 1 is provided with a housing connecting foot 7. The housing connecting foot 7 and the metal base 3 are provided with a limit slot 21. A fixing rod 16 is inserted into the limit slot 21. The bottom of the metal base 3 is provided with a locking groove 17. A telescopic spring 18 is installed inside the locking groove 17. A limit locking block 19 is connected to the outside of the telescopic spring 18. The bottom of the fixing rod 16 is provided with a locking groove 20.

[0025] The sensor housing 1 is snapped into the metal base 3 via the housing connecting foot 7 at the bottom. The fixing rod 16 passes through the housing connecting foot 7 and the limiting slot 21 opened inside the metal base 3 through the top of the housing connecting foot 7. The limiting block 19 extends and retracts inside the block slot 17 via the telescopic spring 18. There are two sets of block slot 17, telescopic spring 18 and limiting block 19. The bottom of the fixing rod 16 is provided with a snap-fit ​​groove 20.

[0026] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, by setting a sealed connection structure, during use, the sensor housing 1 covers the mounting base 9 and the sensor body 10 outside the mounting base 9, allowing the housing connecting foot 7 at the bottom of the sensor housing 1 to engage with the metal base 3 at the bottom of the mounting base 9. Then, the fixing rod 16 is inserted into the limiting slots 21 opened around the housing connecting foot 7 and the metal base 3. The limiting block 19 inside the locking slot 17 at the bottom of the metal base 3 extends and retracts through the telescopic spring 18, allowing the limiting block 19 to engage with the locking slot 20 at the bottom of the fixing rod 16, thus fixing the sensor housing 1 to the outside of the mounting base 9 and sealing the mounting base 9 inside the sensor housing 1, thereby achieving the sealed connection function.

[0027] The sensor body 10 has a heat-dissipating silicone 25 on its inner side, the mounting base 9 has a heat-conducting column 22 inside, and the metal base 3 has a base groove 24 inside, which is filled with heat-dissipating sealant 23.

[0028] Heat dissipation sealant 23 fills the interior groove 24 of the base 3 at the bottom of the mounting body 9. The sensor body 10 contacts the outer wall of the mounting body 9 through heat dissipation silicone 25. The heat conduction column 22 penetrates the interior of the mounting body 9 and the metal base 3.

[0029] Specifically, such as Figure 2 and Figure 4 As shown, by setting a heat dissipation and sealing structure, during use, after applying heat dissipation silicone 25 to the rear end of the sensor body 10 and attaching it to the outside of the mounting base 9, the mounting screw 11 is inserted into the sensor body 10 and the mounting base 9 to connect them. Heat dissipation sealant 23 is filled into the inner groove 24 of the metal base 3 at the bottom of the mounting base 9, so that the heat of the sensor body 10 is transferred to the outside of the mounting base 9 through the heat dissipation silicone 25, and the heat is transferred to the heat dissipation sealant 23 in the mounting base 9 and the metal base 3 and the inner groove 24 of the metal base 3 through the heat conduction column 22 inside the mounting base 9, thereby realizing the heat dissipation and sealing function.

[0030] The sensor housing 1 has a flame-retardant plastic layer 15 on the outside, an impact-resistant mesh layer 14 inside the flame-retardant plastic layer 15, and a wave-absorbing layer 13 attached to the inside of the flame-retardant plastic layer 15.

[0031] The wave-absorbing layer 13 is attached to the inner wall of the sensor housing 1, and the impact-resistant mesh layer 14 is installed inside the sensor housing 1.

[0032] Specifically, such as Figure 1 and Figure 5 As shown, by setting an anti-impact and anti-interference structure, the main body of the sensor housing 1 is made of flame-retardant plastic layer 15 during use. The flame-retardant plastic layer 15 contains flame retardant to prevent external combustion from damaging the sensor housing 1 and the sensor inside the sensor housing 1. The anti-impact mesh layer 14 set inside the flame-retardant plastic layer 15 can increase the impact resistance of the sensor housing 1. The wave-absorbing layer 13 attached to the inner wall of the flame-retardant plastic layer 15 can shield the wave-absorbing patch and increase the anti-interference of the sensor body 10 inside the sensor housing 1, thereby realizing the anti-impact and anti-interference function.

[0033] Working Principle: In this invention, after applying thermal silicone 25 to the rear end of the sensor body 10 and attaching it to the outside of the mounting base 9, the mounting screw 11 is inserted into the sensor body 10 and connected to the mounting base 9. Thermal sealant 23 is filled into the inner groove 24 of the metal base 3 at the bottom of the mounting base 9. The sensor housing 1 covers the mounting base 9 and the sensor body 10 outside the mounting base 9, and the two sets of sensor bodies 10 are connected by a flexible connecting strap 12. The housing connecting foot 7 at the bottom of the sensor housing 1 engages with the metal base 3 at the bottom of the mounting base 9. Then, the fixing rod 16 is inserted into the limiting slots 21 opened around the housing connecting foot 7 and the metal base 3. The limiting block 19 inside the locking slot 17 at the bottom of the metal base 3 extends and retracts via the telescopic spring 18, engaging with the locking groove 20 at the bottom of the fixing rod 16, thus fixing the sensor housing 1 to the mounting base. The sensor housing 10 is sealed to the outside of the body 9. Then, the connecting slot 5 on the left side of the connecting wire 6 is connected to the connecting socket 4 on the right side of the sensor housing 1. The heat of the sensor body 10 is transferred to the outside of the mounting base 9 through the heat dissipation silicone 25. The heat is then transferred to the heat dissipation sealant 23 in the heat dissipation sealant 24 of the mounting base 9 and the metal base 3 through the heat conduction column 22 inside the mounting base 9. The main body of the sensor housing 1 is made of flame-retardant plastic layer 15. The flame-retardant plastic layer 15 contains flame retardant to prevent external combustion from damaging the sensor housing 1 and the sensor inside the sensor housing 1. The impact-resistant mesh layer 14 set inside the flame-retardant plastic layer 15 can increase the impact resistance of the sensor housing 1. The wave-absorbing layer 13 attached to the inner wall of the flame-retardant plastic layer 15 can be a shielding wave-absorbing patch to increase the anti-interference of the sensor body 10 inside the sensor housing 1.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-stage sealed high-precision multi-axis inertial sensor for vehicles, comprising a sensor housing (1) and a metal base (3), characterized in that: The bottom of the sensor housing (1) is provided with a housing connecting foot (7). The housing connecting foot (7) and the metal base (3) are provided with a limit slot (21). A fixing rod (16) is inserted into the limit slot (21). The bottom of the metal base (3) is provided with a locking slot (17). A telescopic spring (18) is installed inside the locking slot (17). A limit locking block (19) is connected to the outside of the telescopic spring (18). The bottom of the fixing rod (16) is provided with a locking groove (20).

2. The multi-stage sealed high-precision multi-axis inertial sensor for vehicles according to claim 1, characterized in that: The sensor housing (1) is snapped into the metal base (3) through the housing connecting foot (7) at the bottom, and the fixing rod (16) passes through the limiting slot (21) opened inside the housing connecting foot (7) and the metal base (3) through the top of the housing connecting foot (7).

3. The multi-stage sealed high-precision multi-axis inertial sensor for vehicles according to claim 1, characterized in that: The limiting block (19) extends and retracts inside the block groove (17) via the telescopic spring (18). There are two sets of the block groove (17), the telescopic spring (18) and the limiting block (19). The bottom of the fixed plug (16) is provided with a snap-fit ​​groove (20).

4. A multi-stage sealed high-precision multi-axis inertial sensor for vehicles according to claim 1, characterized in that: The sensor housing (1) has a lamp housing (2) on its top, a connection socket (4) on its right side, a connection slot (5) on its outside, a connection wire (6) on its right side, a mounting base (9) on its top, a sensor body (10) on its outside, a flashing light (8) on its top, a flexible connecting strip (12) on its outside, and a mounting screw (11) on its outside.

5. A multi-stage sealed high-precision multi-axis inertial sensor for vehicles according to claim 4, characterized in that: The sensor body (10) is provided with heat-dissipating silicone (25) on the inside, the mounting base (9) is provided with heat-conducting columns (22) inside, the metal base (3) is provided with a base groove (24) inside, and the base groove (24) is filled with heat-dissipating sealant (23).

6. A multi-stage sealed high-precision multi-axis inertial sensor for automotive applications according to claim 5, characterized in that: The heat dissipation sealant (23) fills the interior of the base groove (24) opened inside the metal base (3) at the bottom of the mounting body (9). The sensor body (10) contacts the outer wall of the mounting body (9) through the heat dissipation silicone (25). The heat-conducting column (22) penetrates the interior of the mounting body (9) and the metal base (3).

7. A multi-stage sealed high-precision multi-axis inertial sensor for vehicles according to claim 1, characterized in that: The sensor housing (1) is provided with a flame-retardant plastic layer (15) on the outside, an anti-impact mesh layer (14) is provided inside the flame-retardant plastic layer (15), and a wave-absorbing layer (13) is attached to the inside of the flame-retardant plastic layer (15).

8. A multi-stage sealed high-precision multi-axis inertial sensor for vehicles according to claim 7, characterized in that: The absorbing layer (13) is attached to the inner wall of the sensor housing (1), and the anti-impact mesh layer (14) is installed inside the sensor housing (1).

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