Sensor assembly, automobile door and automobile

Abstract

The invention provides a sensor assembly, an automobile door and an automobile. The sensor assembly comprises a bottom plate and a pressure sensor. The first side of the bottom plate is provided with an installation structure, the second side of the bottom plate is provided with a pressure sensor, and the second side of the bottom plate is provided with an air cavity surrounding a sensing part of the pressure sensor; the first side of the bottom plate and the second side of the bottom plate are two opposite sides separated by the bottom plate; an air port is formed in the mounting structure and is communicated with the air cavity through an air channel penetrating through the bottom plate; the mounting structure is used for mounting the sensor assembly on the cavity wall of the to-be-detected cavity, so that the air port is communicated with the inner cavity of the to-be-detected cavity; when the to-be-detected cavity deforms, air in the to-be-detected cavity enters the air cavity from the air port and applies pressure to the sensing part of the pressure sensor, so that the pressure sensor generates a sensing signal. The sensor assembly can quickly sense when the cavity to be detected deforms, so that the detection hysteresis of the pressure sensor is avoided, the detection efficiency is improved, and meanwhile, the installation efficiency can also be improved.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a sensor component, a vehicle door and a vehicle. Background Art

[0002] The airbag in a car is an important facility to protect the lives of passengers. Its working principle is that when a car collides or other safety accidents occur, the sensor detects the vehicle collision and generates relevant signals, thereby triggering the airbag's gas generator, causing the airbag to inflate and pop out to protect the passengers.

[0003] In order to timely sense the collision of the vehicle, multiple sensors are generally installed, and they are respectively installed in the front, rear and side of the vehicle body, so as to monitor the whole vehicle situation. Among them, the sensor installed on the side of the vehicle is generally installed on the door layer. When the side of the vehicle body is hit, the deformation of the door layer will cause the airflow to impact the sensing part of the sensor, so that the sensor installed on the side of the vehicle generates a sensing signal.

[0004] However, in the current installation method of sensors, the sensors are generally simply fixed on the door panels so that the sensing part of the sensor can be impacted by the airflow between the door panels to generate signals. However, when the side of the vehicle is hit and the panels are deformed, the airflow between the door panels is scattered everywhere. The sensor will not detect signals when the airflow impact intensity is insufficient. Its detection has hysteresis, low detection efficiency, and the installation process is cumbersome. Therefore, how to improve the response speed of the sensor has become a technical problem to be solved. Summary of the invention

[0005] The present application provides a sensor assembly to solve the technical problems of existing sensors having hysteresis, insufficient detection efficiency and inconvenient installation. The present application also provides a door and a car equipped with the sensor assembly.

[0006] The embodiment of the present application provides a sensor assembly, the sensor assembly comprising: a housing bottom plate, a pressure sensor;

[0007] A mounting structure is provided on the first side of the bottom plate, a pressure sensor is installed on the second side of the bottom plate, and an air cavity surrounding a sensing part of the pressure sensor is provided on the second side of the bottom plate; the first side of the bottom plate and the second side of the bottom plate are two opposite sides separated by the bottom plate;

[0008] The mounting structure is provided with an air port, which is connected to the air cavity through an air channel penetrating the bottom plate;

[0009] The mounting structure is used to mount the sensor assembly on the cavity wall of the cavity to be tested, so that the air port is connected to the inner cavity of the cavity to be tested; when the cavity to be tested is deformed, the air in the cavity to be tested enters the air cavity from the air port and applies pressure to the sensing part of the pressure sensor, causing the pressure sensor to generate a sensing signal.

[0010] Optionally, the mounting structure includes a boss and a claw disposed on the boss and away from the bottom plate, the claw and the bottom plate being separated by a preset distance; the air port is disposed at the end of the boss;

[0011] When the mounting structure mounts the sensor assembly on the cavity wall of the cavity to be tested, the cavity wall of the cavity to be tested is clamped between the clamping claw and the bottom plate, and the air port extends into the inner cavity of the cavity to be tested.

[0012] Optionally, a slope is provided on a side of the claw close to the bottom plate, and the closer the slope is to the boss, the smaller the distance between the slope and the bottom plate.

[0013] Optionally, the sensor assembly further comprises a housing;

[0014] The bottom plate is rotatably sleeved in the outer shell so that the claw can rotate relative to the outer shell; a movable blocking member is arranged on the outer shell so that the rotation of the claw relative to the outer shell is locked or unlocked.

[0015] Optionally, a clamping block is provided on the circumferential direction of the boss;

[0016] The blocking member is located on the first side of the bottom plate, and the blocking member includes a blocking block matched with the clamping block, and a top block away from the bottom plate, and the top block can drive the blocking block to approach or away from the bottom plate under the action of an external force;

[0017] When the engaging block is blocked by the stopper, the rotation of the claw relative to the housing is locked; when the cavity wall of the cavity to be tested is stuck between the engaging claw and the bottom plate, the cavity wall of the cavity to be tested lifts up the push block, and the push block drives the stopper to move toward the first side of the bottom plate, so that the engaging block is offset from the stopper, thereby releasing the lock.

[0018] Optionally, the clamping block includes a first clamping block and a second clamping block, and the blocking member includes a first blocking member and a second blocking member; in a first rotation direction of the claw relative to the housing, the first clamping block is located before the first blocking member, and the second clamping block is located after the blocking member, so that the housing bidirectionally blocks the rotation of the bottom plate, so that the rotation of the claw relative to the housing is locked.

[0019] Optionally, the sensor assembly also includes a shell, on which are provided sealing rings located on both sides of the bottom plate; when the mounting structure mounts the sensor assembly on the cavity wall of the cavity to be tested, the sealing ring is located on the first side of the bottom plate to close the gap between the shell and the cavity wall of the cavity to be tested, and the sealing ring is located on the second side of the bottom plate to seal the gap between the cavity to be tested and the bottom plate.

[0020] Optionally, the sensor assembly further includes a sealing gasket, which is located between the base plate and the shell. After the base plate, the sealing gasket and the shell are installed, the sealing gasket is used to ensure the sealing of the air cavity of the sensing part of the pressure sensor.

[0021] Optionally, the pressure sensor is a piezoresistive pressure sensor or a capacitive pressure sensor.

[0022] The embodiment of the present application further provides a vehicle door, the vehicle door comprising a first layer plate, a second layer plate and any one of the above feasible sensor components;

[0023] The first and second panels are separated by a preset distance to form a cavity to be tested; the installation structure of the sensor assembly installs the sensor assembly on the first or second panel so that when the vehicle door is collided, the gas between the first and second panels enters the air cavity and applies pressure to the pressure sensor sensing part of the sensor assembly, causing the pressure sensor to generate a sensing signal.

[0024] An embodiment of the present application further provides a car, comprising a cavity to be tested and any one of the above-mentioned feasible sensor components.

[0025] Compared with the prior art, this application has the following advantages:

[0026] In the sensor assembly provided by the present application, the mounting structure is arranged on the first side of the base plate, the pressure sensor is arranged on the second side of the base plate, and the second side of the base plate is provided with an air cavity surrounding the sensing part of the pressure sensor, and the air port on the mounting structure is connected with the air cavity through the gas channel penetrating the base plate, so that the airflow in the inner cavity of the cavity to be tested can enter the air cavity through the gas channel. When the sensor assembly is mounted on the cavity to be tested through the mounting structure, the sensor assembly can be fixedly mounted on the cavity to be tested through the clamping claw. If the cavity to be tested is deformed, the airflow in the cavity to be tested will escape everywhere, and part of the airflow can be squeezed into the gas channel and enter the air cavity from the air port under the action of air pressure, thereby increasing the air pressure in the air cavity, thereby applying sufficient pressure to the sensing part of the pressure sensor, so that the pressure sensor can quickly sense when the cavity to be tested is deformed, avoiding the hysteresis of the pressure sensor detection, improving the detection efficiency, and at the same time, improving the installation efficiency of the sensor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of a sensor assembly provided in an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of a first side of a base plate of a sensor assembly provided in an embodiment of the present application.

[0029] Figure 3This is a first schematic diagram of the second side of a base plate of a sensor assembly provided in an embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of a framework of a sensor assembly provided in an embodiment of the present application.

[0031] Figure 5 This is a second schematic diagram of the second side of a base plate of a sensor assembly provided in an embodiment of the present application.

[0032] Figure 6 It is a schematic diagram of a housing of a sensor assembly provided in an embodiment of the present application.

[0033] Reference numerals:

[0034] Frame 10; bottom plate 11; limit block 12; guide groove 13;

[0035] Mounting structure 20; boss 21; claw 22; inclined surface 23; clamping block 24; first clamping block 241; second clamping block 242

[0036] Pressure sensor 30; Sensing unit 31;

[0037] Gas port 41; gas channel 42; gas cavity 43;

[0038] Housing 50; elastic blocking arm 51; limiting rib 52; finger push column 53;

[0039] Blocking member 60; first blocking member 61; second blocking member 62; blocking block 63; top block 64;

[0040] Sealing ring 70;

[0041] Sealing pad 80;

[0042] Shell 90; guide rib 91; buckle 92. DETAILED DESCRIPTION

[0043] Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0044] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In today's cars, sensors are usually simply fixed on the door panels so that the sensing part of the sensor can be impacted by the airflow between the door panels to generate signals. However, when the side of the vehicle is hit and the panels are deformed, the airflow between the door panels is scattered everywhere. When the airflow impact intensity is insufficient, the sensor will not detect the signal, and its detection has hysteresis, insufficient detection efficiency, and low installation efficiency. Therefore, how to improve the sensor's response speed and installation efficiency has become a technical problem to be solved.

[0047] In order to solve the above problems, the present application provides a feasible sensor assembly. In the sensor assembly, the mounting structure is arranged on the first side of the base plate, the pressure sensor is arranged on the second side of the base plate, and the second side of the base plate is provided with an air cavity surrounding the sensing part of the pressure sensor, and the air port on the mounting structure is connected to the air cavity through the gas channel penetrating the base plate, so that the airflow in the cavity to be measured can enter the air cavity through the gas channel. When the sensor assembly is installed on the cavity to be measured through the mounting structure, if the cavity to be measured is deformed, the airflow in the cavity to be measured will escape everywhere, and part of the airflow will be squeezed into the gas channel and enter the air cavity from the air port under the action of air pressure, thereby increasing the air pressure in the air cavity, thereby applying sufficient pressure to the sensing part of the pressure sensor, so that the pressure sensor can quickly sense when the cavity to be measured is deformed, avoiding the hysteresis of the pressure sensor detection and improving the detection efficiency.

[0048] In the present application, during the installation process of clamping the cavity wall between the clamping claw and the base plate, the clamping claw is rotated to adjust the installation position, which facilitates installation and improves the installation efficiency of the sensor assembly.

[0049] Such sensor components as Figure 1 , Figure 2 and Figure 3 As shown, Figure 1 It is a cross-sectional view of a sensor assembly provided in an embodiment of the present application. Figure 2 It is a schematic diagram of a first side of a base plate of a sensor assembly provided in an embodiment of the present application. Figure 3 1 is a first schematic diagram of a second side of a bottom plate of a sensor assembly provided in an embodiment of the present application, wherein the sensor assembly comprises: a bottom plate 11 and a pressure sensor 30 .

[0050] The first side of the bottom plate 11 is provided with a mounting structure 20, the second side of the bottom plate 11 is provided with a pressure sensor 30, and the second side of the bottom plate 11 is provided with an air cavity 43 surrounding the sensing part 31 of the pressure sensor 30; the first side of the bottom plate 11 and the second side of the bottom plate 11 are two opposite sides separated by the bottom plate 11. The mounting structure 20 is provided with an air port 41, and the air port 41 is connected to the air cavity 43 through a gas channel 42 that penetrates the bottom plate 11; the mounting structure 20 is used to mount the sensor assembly on the cavity wall of the cavity to be tested, so that the air port 41 is connected to the inner cavity of the cavity to be tested; when the cavity to be tested is deformed, the air in the cavity to be tested enters the air cavity 43 from the air port 41 and presses the sensing part 31 of the pressure sensor 30, so that the pressure sensor 30 generates a sensing signal.

[0051] In this embodiment, the air port 41 may be designed to be wide at first and narrow at the end, which can be understood as the air port 41 is connected to the gas channel 42 at the narrower side of the air port 41, and the air in the cavity to be tested enters from the wider side of the air port 41. Of course, the sizes of the two sides of the air port 41 may be the same, and the design of the air port 41 can be determined according to specific work needs.

[0052] The bottom plate 11 is a part of the frame 10, and is used to separate the mounting structure 20 and the pressure sensor 30. The bottom plate 11 can be configured in various shapes, such as circular, square, oval, and the like.

[0053] The mounting structure 20 on the first side of the bottom plate 11 may be a partial structure on the frame 10, or a separate structure connected to the bottom plate 11 or the frame 10. The mounting structure 20 is used to mount the sensor assembly on the cavity wall of the cavity to be tested, and the mounting structure 20 may be specifically configured as a claw type, a snap-on type, a threaded connection type structure, etc., which is not limited here.

[0054] The pressure sensor 30 is disposed on the second side of the bottom plate 11, and can be specifically a piezoresistive pressure sensor 30 or a capacitive pressure sensor 30. The sensing portion 31 of the pressure sensor 30 is surrounded by an air cavity 43, and the air cavity 43 is only connected to the air port 41 on the mounting structure 20 through a gas channel 42 that penetrates the bottom plate 11, thereby communicating with the outside world. This air cavity 43 can be a container-type structure extending from the frame 10, or a separate container-type structure, as long as it can contain gas and enable the sensing portion 31 of the pressure sensor 30 to sense the gas pressure.

[0055] In this embodiment, the mounting structure 20, the bottom plate 11, the air cavity 43, the sealing pad 80 and the pressure sensor 30 are sequentially arranged in the direction from the first side of the bottom plate 11 to the second side of the bottom plate 11. In addition, the air port 41, the air channel 42 and the air cavity 43 are sequentially arranged to form a gas flow channel, so that the gas can reach the air cavity 43 on the second side of the bottom plate 11 from the first side of the bottom plate 11.

[0056] The cavity to be tested is a structure that needs to be installed with a sensor assembly for detection. It is not a part of the sensor assembly, but a structure to be detected. The inner cavity of the cavity to be tested is surrounded by the cavity wall, and a structure matching the mounting structure 20 is reserved on the cavity wall of the cavity to be tested, such as a mounting hole, a slot, a threaded hole, etc., which are not limited here. For example, the cavity to be tested may refer to a structure formed by two layers of a car door. The two layers are the cavity walls of the cavity to be tested, and the cavity space between the two layers of the door is the inner cavity of the cavity to be tested. The mounting hole opened on the layer close to the interior of the car body is a reserved structure matching the mounting structure 20.

[0057] When the sensor assembly is installed on the cavity to be tested through the mounting structure 20, the air port 41 will be connected to the inner cavity of the cavity to be tested, so that the gas in the inner cavity of the cavity to be tested can enter the air cavity 43 through the air port 41 and the gas channel 42. When the cavity to be tested is deformed due to collision, the change in pressure will cause the gas in the inner cavity of the cavity to be tested to squeeze outward, and the gas will squeeze into the gas channel 42 from the air port 41, and then squeeze into the air cavity 43, so that the air pressure in the air cavity 43 increases, and the sensing part 31 of the pressure sensor 30 senses the changed air pressure, thereby generating a signal to achieve the purpose of timely sensing. In addition, since the structure of the air port 41, the gas channel 42 and the air cavity 43 collects the scattered air flow in the cavity to be tested, the air cavity 43 becomes a sub-cavity connected to the inner cavity to be tested, and the air pressure change of the air cavity 43 can better reflect the state of the cavity to be tested, so that the pressure sensor 30 has a higher reliability in detecting the cavity to be tested.

[0058] This embodiment provides a feasible claw-type installation structure 20, specifically as follows Figure 2 As shown, the mounting structure 20 includes a boss 21 and a claw 22 arranged on the boss 21 and away from the bottom plate 11, and the claw 22 is separated from the bottom plate 11 by a preset distance; the air port 41 is arranged at the end of the boss 21; when the mounting structure 20 mounts the sensor assembly on the cavity wall of the cavity to be tested, the cavity wall of the cavity to be tested is clamped between the claw 22 and the bottom plate 11, and the air port 41 extends into the inner cavity of the cavity to be tested.

[0059] In this installation structure 20, the space between the clamping claw 22 and the bottom plate 11 is a reserved space, and the cavity wall can be just clamped between the clamping claw 22 and the bottom plate 11, so that the installation process is sufficiently simple.

[0060] For example, when installing the sensor assembly, it is only necessary to insert the clamping claw 22 into the mounting hole and adjust the position of the clamping claw 22 to clamp the cavity wall between the clamping claw 22 and the bottom plate 11. In addition, in order to reliably clamp the cavity wall between the clamping claw 22 and the bottom plate 11, the following can be done: Figure 4 As shown, Figure 42 is a schematic diagram of a sensor assembly frame provided in an embodiment of the present application. Specifically, a slope 23 is provided on the side of the claw 22 close to the bottom plate 11, and the closer the slope 23 is to the boss 21, the smaller the distance between the slope 23 and the bottom plate 11. In this way, the cavity wall can be clamped between the claw 22 and the bottom plate 11 in an interference fit by applying force, so that the sensor assembly can be reliably installed on the cavity to be tested.

[0061] Furthermore, during the installation process of clamping the cavity wall between the clamping claw 22 and the bottom plate 11, the clamping claw 22 needs to be rotated to adjust the installation position. Figure 1 , Figure 2 and Figure 3 As shown, a housing 50 is further provided, and the housing 50 includes an elastic blocking arm 51 and a limiting rib 52. A limiting block 12 is provided on the bottom plate 11. When the bottom plate 11 is rotatably sleeved in the housing 50, the finger push column 53 is pushed clockwise to drive the limiting block 12 on the bottom plate 11 to rotate clockwise. During the rotation process, the limiting block 11 contacts the elastic blocking arm 51 on the housing 50, and the elastic blocking arm 51 is deformed until the limiting block 11 contacts the limiting rib 52 on the housing 50 and is fixed, so that the rotation of the claw 22 relative to the housing 50 is locked or unlocked.

[0062] In this embodiment, the bottom plate 11 is sleeved in the housing 50, and a part of the structure of the housing 50 can be located between the bottom plate 11 and the claw 22, so that when the cavity wall is stuck between the bottom plate 11 and the claw 22, the cavity wall is actually stuck between the claw 22 and the housing 50. When the user adjusts the position of the claw 22, the force can be applied to the frame 10, thereby preventing the bottom plate 11 from being worn and facilitating the application of force.

[0063] In addition, the blocking member 60 can lock or unlock the rotation of the claw 22 relative to the housing 50, so that the claw 22 is in a free rotation state only when the position needs to be adjusted. In combination with the elastic blocking arm 51, the limit block 11 and the limit rib 52, the rotation of the claw 22 can be fixed at the target position.

[0064] There are many specific ways to set the blocking member 60. One feasible implementation is as follows: Figure 2As shown, a clamping block 24 is circumferentially arranged on the boss 21; the blocking member 60 is located on the first side of the bottom plate 11, and the blocking member 60 includes a block 63 cooperating with the clamping block 24, and a top block 64 away from the bottom plate 11, and the top block 64 can drive the block 63 to approach or move away from the bottom plate 11 under the action of external force; when the clamping block 24 is blocked by the block 63, the rotation of the claw 22 relative to the housing 50 is locked; when the cavity wall of the cavity to be tested is stuck between the claw 22 and the bottom plate 11, the cavity wall of the cavity to be tested lifts the top block 64, and the top block 64 drives the block 63 to move toward the first side of the bottom plate, so that the clamping block 24 and the block 63 are staggered, thereby releasing the lock.

[0065] When the mounting structure 20 is not mounted on the cavity to be tested, the blocking member 60 is located on the rotation path of the clamping block 24, restricting the rotation of the bottom plate 11, so that the claw 22 cannot rotate completely freely, so that the rotation of the claw 22 relative to the housing 50 is locked.

[0066] When installing the sensor assembly, the user needs to first align the first side of the sensor assembly with the mounting hole on the chamber to be tested and insert it so that the claw 22 enters the inner cavity of the chamber to be tested from the mounting hole. During this process, the chamber wall of the chamber to be tested will lift up the top block 64, and the top block 64 drives the stopper 63 to approach the bottom plate 11. The stopper 63 and the block are offset and no longer located on the rotation path of the block, so the block is no longer blocked, so that the bottom plate 11 and the claw 22 can rotate freely relative to the housing 50, and the lock of the block is released.

[0067] The clamping block 24 and the blocking member 60 may also be provided in plurality, such as Figure 5 As shown, Figure 5 1 is a second schematic diagram of the second side of the bottom plate of a sensor assembly provided by an embodiment of the present application. The clamping block 24 includes a first clamping block 241 and a second clamping block 242, and the blocking member 60 includes a first blocking member 61 and a second blocking member 62; in the first rotation direction of the claw 22 relative to the housing 50, the first clamping block 241 is located before the first blocking member 61, and the second clamping block 242 is located after the blocking member 60, so that the housing 50 blocks the rotation of the bottom plate 11 in both directions, so that the rotation of the claw 22 relative to the housing 50 is locked.

[0068] In addition, when the cavity to be tested is deformed, the gas in the cavity to be tested will escape everywhere. Due to the insufficient airtightness between the mounting structure 20 and the cavity wall of the cavity to be tested, the gas may escape too much, resulting in insufficient air entering the air cavity 43. In this regard, a sealing ring 70 and a sealing pad 80 can be provided. Specifically, the sealing ring 70 and the sealing pad 80 can be provided as follows. Figure 1 , Figure 2 and Figure 5As shown, the shell is provided with a sealing ring 70 located on the first side of the bottom plate 11 and the second side of the bottom plate; when the mounting structure 20 mounts the sensor assembly on the cavity wall of the cavity to be tested, the sealing ring 70 is located on the first side of the bottom plate to close the gap between the outer shell 50 and the cavity wall of the cavity to be tested, and the sealing ring 70 is located on the second side of the bottom plate to seal the gap between the cavity to be tested and the bottom plate.

[0069] The sensor assembly further comprises a housing 90, which is fixed to the second side of the base plate and is used to accommodate the sensor. Figure 3 and Figure 6 As shown, the housing 90 integrates the female end engaged with the male end of the connector, the PIN pin, and the buckles 92 and guide ribs 91 dispersed in the circumferential direction of the housing. A sealing gasket 80 is arranged between the bottom plate 11 and the housing 90. When the bottom plate, the sealing gasket and the housing are installed, the sealing of the air cavity of the sensing part 31 of the pressure sensor is ensured.

[0070] Specifically, the bottom plate 11 and the housing 90 are guided and limited by the guide grooves 13 provided on the bottom plate and the guide ribs 91 on the housing during assembly, and finally fixed by the buckles 92 on the housing 90. At this time, the sealing gasket 80 is interference-fitted between the bottom plate 11 and the housing 90, preventing the problem of excessive gas escape.

[0071] In the sensor assembly provided by the above embodiment, the mounting structure is arranged on the first side of the bottom plate, the pressure sensor is arranged on the second side of the bottom plate, and an air cavity surrounding the sensing part of the pressure sensor is arranged on the second side of the bottom plate, and the air port on the mounting structure is connected to the air cavity through the gas channel penetrating the bottom plate, so that the airflow in the cavity to be measured can enter the air cavity through the gas channel. When the sensor assembly is installed on the cavity to be measured through the mounting structure, if the cavity to be measured is deformed, the airflow in the cavity to be measured will escape everywhere, and part of the airflow will be squeezed into the gas channel from the air port under the action of air pressure, and enter the air cavity to increase the air pressure in the air cavity, thereby applying sufficient pressure to the sensing part of the pressure sensor, so that the pressure sensor can quickly sense when the cavity to be measured is deformed, avoiding the hysteresis of the pressure sensor detection and improving the detection efficiency.

[0072] The above first embodiment describes the sensor assembly. Correspondingly, the following second embodiment provides a vehicle door including any feasible sensor assembly in the above first embodiment, as follows.

[0073] The vehicle door provided in this embodiment includes a first layer plate, a second layer plate and a sensor assembly; the first layer plate and the second layer plate are separated by a preset distance and form a cavity to be tested;

[0074] The sensor assembly includes: a base plate and a pressure sensor;

[0075] A mounting structure is provided on the first side of the bottom plate, a pressure sensor is installed on the second side of the bottom plate, and an air cavity surrounding a sensing part of the pressure sensor is provided on the second side of the bottom plate; the first side of the bottom plate and the second side of the bottom plate are two opposite sides separated by the bottom plate;

[0076] The mounting structure is provided with an air port, which is connected to the air cavity through an air channel penetrating the bottom plate;

[0077] The installation structure of the sensor assembly installs the sensor assembly on the first layer board or the second layer board, so that when the vehicle door is collided, the gas between the first layer board and the second layer board enters the air cavity to pressurize the pressure sensor sensing part of the sensor assembly, so that the pressure sensor generates a sensing signal.

[0078] The specific implementation of the sensor assembly in this embodiment is similar to the sensor assembly in the first embodiment described above. Please refer to the relevant contents of the first embodiment described above for details, and no unnecessary details will be given here.

[0079] Corresponding to the first embodiment above, the third embodiment of the present application further provides a car, which includes a cavity to be tested and a sensor assembly. The specific implementation of the sensor assembly is similar to the sensor assembly of the first embodiment above, and the details are shown in the relevant content of the first embodiment above, and no redundant description is given here.

[0080] It should be noted that, although several structures, components or units for realizing related functions are mentioned in the above detailed description, such division is not mandatory. In fact, according to the specific implementation of the present application, the features and functions of two or more structures, components or units described above can be concretized in one structure, component or unit. Conversely, the features and functions of one structure, component or unit described above can be further divided into multiple components, structures or units to be concretized.

[0081] In addition, although the components and the installation methods of the components or devices in the present application are described in a specific order in the drawings, this does not require or imply that the components or devices must be designed according to the specific components or the installation methods of the components, or that all the components shown must be included to achieve the desired results. Additionally or alternatively, some components can be omitted, multiple components can be combined into one component to achieve corresponding functions, and / or one component can be decomposed into multiple components to achieve corresponding functions, etc.

[0082] Although the present application is disclosed as above in the form of a preferred embodiment, it is not intended to limit the present application. Any technical personnel in this field may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A sensor assembly, characterized in that: The sensor assembly comprises: a base plate and a pressure sensor; The first side of the bottom plate is provided with a mounting structure, the second side of the bottom plate is provided with the pressure sensor, and the second side of the bottom plate is provided with an air cavity surrounding the sensing part of the pressure sensor; the first side of the bottom plate and the second side of the bottom plate are two opposite sides separated by the bottom plate; The mounting structure is provided with an air port, and the air port is connected with the air cavity through an air channel penetrating the bottom plate; The mounting structure is used to mount the sensor assembly on the cavity wall of the cavity to be tested, so that the air port is connected to the inner cavity of the cavity to be tested; when the cavity to be tested is deformed, the air in the cavity to be tested enters the air cavity from the air port and applies pressure to the sensing part of the pressure sensor, so that the pressure sensor generates a sensing signal.

2. The sensor assembly according to claim 1, characterized in that The mounting structure comprises a boss and a claw arranged on the boss and away from the bottom plate, wherein the claw is spaced from the bottom plate by a preset distance; the air port is arranged at the end of the boss; When the mounting structure mounts the sensor assembly on the cavity wall of the cavity to be measured, the cavity wall of the cavity to be measured is clamped between the clamping claw and the bottom plate, and the air port extends into the inner cavity of the cavity to be measured.

3. The sensor assembly according to claim 2, characterized in that A slope is provided on a first side of the claw close to the bottom plate, and the closer the slope is to the boss, the smaller the distance between the slope and the bottom plate.

4. The sensor assembly according to claim 2, characterized in that The sensor assembly also includes a housing; The bottom plate is rotatably sleeved in the shell so that the claw can rotate relative to the shell; a movable blocking member is arranged on the shell so that the rotation of the claw relative to the shell is locked or the locking is released.

5. The sensor assembly according to claim 4, characterized in that A clamping block is arranged on the circumference of the boss; The blocking member is located at the first side of the bottom plate, and the blocking member includes a blocking block matched with the clamping block, and a top block away from the bottom plate, and the top block can drive the blocking block to approach or away from the bottom plate under the action of an external force; When the engaging block is blocked by the stopper, the rotation of the claw relative to the housing is locked; when the cavity wall of the cavity to be tested is stuck between the engaging claw and the bottom plate, the cavity wall of the cavity to be tested lifts up the top block, and the top block drives the stopper to move toward the first side of the bottom plate, so that the engaging block is offset from the stopper, thereby releasing the lock.

6. The sensor assembly according to claim 5, characterized in that The clamping block includes a first clamping block and a second clamping block, and the blocking member includes a first blocking member and a second blocking member; in a first rotation direction of the claw relative to the shell, the first clamping block is located before the first blocking member, and the second clamping block is located after the blocking member, so that the shell can bidirectionally block the rotation of the base plate, so that the rotation of the claw relative to the shell is locked.

7. The sensor assembly according to claim 4, characterized in that The sensor assembly also includes a shell, and the shell is provided with sealing rings located on both sides of the bottom plate; when the mounting structure mounts the sensor assembly on the cavity wall of the cavity to be tested, the sealing ring is located on the first side of the bottom plate to seal the gap between the shell and the cavity wall of the cavity to be tested, and the sealing ring is located on the second side of the bottom plate to seal the gap between the cavity to be tested and the bottom plate.

8. The sensor assembly according to claim 7, characterized in that The sensor assembly further comprises a sealing gasket, which is located between the base plate and the housing. After the base plate, the sealing gasket and the housing are installed, the sealing gasket is used to ensure the sealing of the air cavity of the sensing part of the pressure sensor.

9. A vehicle door, characterized in that: The vehicle door comprises a first layer plate, a second layer plate and a sensor assembly according to any one of claims 1 to 8; The first layer plate and the second layer plate are separated by a preset distance and form a cavity to be tested; the mounting structure of the sensor assembly mounts the sensor assembly on the first layer plate or the second layer plate, so that when the vehicle door is collided, the gas between the first layer plate and the second layer plate enters the air cavity to pressurize the pressure sensor sensing part of the sensor assembly, so that the pressure sensor generates a sensing signal.

10. An automobile, characterized in that: The automobile comprises a cavity to be tested and a sensor assembly according to any one of claims 1-8.

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