Self-adaptive vibration compensation device for automobile intelligent sensor

Abstract

The invention discloses a self-adaptive vibration compensation device for an automobile intelligent sensor, and relates to the technical field of vibration detection of sensors for assisting vehicle driving, and the self-adaptive vibration compensation device comprises a bracket for installing the sensor, the bracket is in bolted connection with a buffer rack, the surface of the buffer rack is provided with a buffer assembly, and the buffer rack is connected with a sensing assembly through the buffer assembly. Two concentric magnetic tubes are arranged on the surface, located in the annular protrusion, of the buffer frame, the induction assembly comprises a covering shell connected with the duckbilled support, two concentric magnetic rings are inlaid in the surface of the covering shell, a coil assembly is arranged on the surface of the covering shell, and when vibration occurs, attraction between the magnetic tubes and the magnetic rings is broken, so that the vibration is generated; at the moment, the position of the magnetic tube changes relative to the magnetic ring, the magnetic tube and the coil assembly move relatively in the moving process, the coil generates electromagnetic induction in the moving process to generate current, the current is conveyed to the central control equipment, and the central control equipment only needs to judge the compensation amplitude according to the magnitude of the current.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vibration detection of sensors for assisting vehicle driving, in particular to an adaptive vibration compensation device for intelligent sensors of a vehicle. BACKGROUND

[0002] The sensor can sense the surroundings of the driving path in real time during the driving of the vehicle, and after the sensing image is sorted by the central processor or the independent processor in the vehicle machine, it is transmitted to the automatic driving controller, so as to ensure that the automatic driving controller obtains sufficient operation data, and at the same time, the driving environment can be fed back to the driver in real time through the display device.

[0003] However, the sensing effect of the sensor is required to be high during the driving of special vehicles such as off-road vehicles and information collection vehicles, and the sensor is usually directly connected with the vehicle body. The vibration generated during the driving of the vehicle is directly transmitted in the sensor. Such vibration not only shortens the service life of the sensor, but also causes errors in the output data of the sensor. Most sensors have active compensation function or central control equipment and processor has passive compensation function, which can be compensated to ensure the accuracy and stability of the output data of the sensor.

[0004] However, the "compensation" function will have a certain impact on the actual display effect of the sensor, such as sensing delay or sensing failure. For example, when the off-road vehicle quickly passes through a continuous slightly bumpy road section, the sensor may overcompensate, resulting in distortion and even error sensing of the final output image. When the information collection vehicle is slightly vibrating during driving, the "compensation" function of the sensor is started, resulting in blurred or even discontinuous recording image. When the vehicle is continuously slightly or greatly vibrating during automatic driving, the output data of the sensor may have errors or the measuring accuracy is affected under the action of "compensation", resulting in large-scale adjustment of the output data, so that the vehicle may have problems such as sudden stop, error obstacle avoidance and error steering during automatic driving.

[0005] Therefore, a vibration sensor is arranged between the sensor and the central control equipment to detect whether vibration occurs to determine whether the sensor needs to be compensated. However, the additional vibration sensor increases the complexity of the system, so that the central control equipment needs to process additional data; at the same time, the reliability of the overall system is reduced. If the vibration sensor itself fails, it may cause the central control equipment to send an error compensation signal, resulting in overcompensation or loss of compensation effect of the normally operating sensor. SUMMARY

[0006] In view of the above problems, the application aims to provide an automobile intelligent sensor adaptive vibration compensation device, which solves the problem that the central control equipment cannot compensate the sensor according to the vibration when the sensor vibrates with the vehicle, and also solves the problem that the sensor cannot effectively alleviate the vibration when directly connected with the vehicle body, which shortens the service life of the sensor and affects the normal work of the sensor.

[0007] The technical scheme of the application is as follows: an automobile intelligent sensor adaptive vibration compensation device, comprising a bracket for mounting a sensor, a buffer frame connected to the bracket by bolts, a buffer assembly arranged on the surface of the buffer frame, and an induction assembly connected to the buffer frame through the buffer assembly.

[0008] The buffer assembly comprises an annular protrusion arranged on the surface of the buffer frame, which forms a circular mounting area on the surface of the buffer frame, a plurality of duckbill supports are uniformly and spacedly arranged on the surface of the annular protrusion, and two concentric magnetic tubes are arranged on the surface of the buffer frame inside the annular protrusion, with a gap between the two magnetic tubes; the duckbill supports are connected to the induction assembly.

[0009] The induction assembly comprises a cover shell connected to the duckbill supports, two magnetic rings are inlaid on the surface of the cover shell and arranged concentrically, the gap between the two magnetic rings is matched with the gap between the two magnetic tubes, the magnetic rings and the magnetic tubes attract each other, a coil assembly is arranged on the surface of the cover shell, the coil assembly is arranged between the two magnetic rings, the end of the coil assembly extends into the gap between the two magnetic tubes, an output line connected to the coil assembly is arranged on the surface of the cover shell, and the end of the output line is electrically connected to the central control equipment.

[0010] Further, the magnetic tube is composed of a plurality of annular magnetic sheets which are sequentially stacked and bonded by epoxy resin material, the magnetic poles of every two adjacent magnetic sheets are opposite, and the alternating annular magnetic sheet stack array can generate a super-high magnetic field gradient at the junction of adjacent magnetic sheets, so that the electromagnetic induction sensitivity of the magnetic tube is improved without increasing the volume.

[0011] Further, the cover shell comprises an external rectangular connecting frame and an internal circular bowl, the duckbill supports are connected to the inner sidewall of the bowl of the cover shell, the magnetic rings are arranged on the inner wall surface of the bowl of the cover shell, the rectangular connecting frame of the cover shell can be connected to the vehicle body, so as to complete the installation and fixation of the overall structure at the required position, and at the same time, the bowl of the cover shell forms a recessed mounting space inside, and the remaining structures can be installed to reduce the volume of the overall device.

[0012] Further, the coil group is composed of two cylindrical grid supports with gaps between each other and coils wound outside the supports, the coils wound outside each grid support are distributed along the axial direction, and the two grid supports are staggered along the center of the circle, which increases the number of coils in the coil group and ensures that the two coils of the coil group can be as close to the two magnetic tubes as possible, and electromagnetic induction can occur better when the coil group moves relative to the magnetic tube.

[0013] Further, the attractive force between the magnetic ring and the magnetic tube is greater than the minimum supporting force of the duckbill support, which avoids the situation that the magnetic ring excessively attracts the magnetic tube, causing the buffer support to fail to buffer the transmission of vibration when vibration occurs.

[0014] Further, there is a gap between the end of the annular protrusion on the surface of the buffer support and the cover shell, which ensures that the buffer support is not blocked by the cover shell when it shakes.

[0015] Further, there is a gap between the coil group and the magnetic tube.

[0016] Further, the duckbill support is always in a relaxed state, and the annular protrusion is pushed by the thrust generated when the duckbill support is relaxed, so that the position of the buffer support is always fixed.

[0017] Further, a magnetic isolation sheet made of multiple layers of aluminum is arranged between the bracket and the buffer support, which reduces the influence of the magnetic tube and the magnetic ring on the sensor.

[0018] The beneficial effects of the present application are as follows:

[0019] 1. When the vibration range of the vehicle body is within the acceptance range of the sensor, the attraction between the magnetic ring and the magnetic tube will fix the position of the magnetic tube, thereby fixing the buffer support and the bracket following the vibration of the vehicle body by limiting the position of the magnetic tube. At this time, the vibration cannot effectively affect the sensor, and when the vibration of the vehicle body is too large, the attraction between the magnetic tube and the magnetic ring is broken, the magnetic ring temporarily loses the constraint on the magnetic tube, and the buffer support connected to the magnetic tube can lose the position limitation together with the bracket, avoiding the sensor from following the vehicle body to synchronously vibrate too much. When the vibration acts on the annular protrusion through the duckbill support, the duckbill support can deform elastically to reduce the vibration amplitude and push the annular protrusion to drive the buffer support to quickly reset, restore the attraction between the magnetic tube and the magnetic ring, and complete the position limitation of the buffer support. This avoids the vibration of the vehicle body from being compensated when no additional compensation is needed, and reduces the vibration directly acting on the sensor.

[0020] 2、When the vibration occurs, the attraction between the magnetic tube and the magnetic ring is broken, at this time the magnetic tube changes the position relative to the magnetic ring, the change is the irregular vertical and horizontal movement, in the moving process the magnetic tube and the coil group move relative to each other, in the moving process the coil generates electromagnetic induction to produce current, the amplitude and frequency of relative movement will affect the size of the current, the current is transported to the central control equipment, the central control equipment only needs to judge the compensation amplitude according to the size of the current, and no additional energy is needed in the whole process, and even a small movement of the magnetic tube will produce a small current in the electromagnetic induction process, the central control equipment can complete the judgment only by sensing the current intensity, which reduces the information processing intensity of the central control equipment, and avoids the sensor from being overcompensated. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 It is a rear view schematic diagram of the overall structure of the present application;

[0023] Figure 3 It is a schematic diagram of the bracket structure of the present application;

[0024] Figure 4 It is a schematic diagram of the buffer assembly structure of the present application;

[0025] Figure 5 It is a schematic diagram of the induction assembly structure of the present application;

[0026] Figure 6 It is a schematic diagram of the coil group and the magnetic tube cooperation state of the present application;

[0027] Figure 7 It is a schematic diagram of the cooperation state of the magnetic tube and the magnetic ring of the present application.

[0028] Reference signs: 1, bracket; 2, buffer bracket; 3, buffer assembly; 4, induction assembly; 31, annular protrusion; 32, duckbill support; 33, magnetic tube; 41, cover shell; 42, magnetic ring; 43, coil group; 44, output line. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0030] As shown in the drawings, Figures 1-4 A kind of automobile intelligent sensor adaptive vibration compensation device, including the bracket 1 of installation sensor, bracket 1 is bolted with buffer bracket 2, buffer bracket 2 surface is provided with buffer assembly 3, buffer bracket 2 is connected induction assembly 4 by buffer assembly 3;

[0031] The buffer assembly 3 includes an annular protrusion 31 arranged on the surface of the buffer frame 2, which forms a circular mounting area on the surface of the buffer frame 2, and a plurality of duckbill supports 32 are uniformly arranged around the surface of the annular protrusion 31, which is always in a relaxed state, and the annular protrusion 31 is pushed by the pushing force generated by the relaxation of the duckbill supports 32 to fix the position of the buffer frame 2. The surface of the buffer frame 2 inside the annular protrusion 31 is provided with two concentric magnetic tubes 33, and a gap is left between the two magnetic tubes 33. The magnetic tube 33 is composed of a plurality of annular magnetic sheets stacked and bonded by epoxy resin material, and the magnetic poles of every two adjacent magnetic sheets are opposite. The alternating annular magnetic sheet stack array can generate a super-high magnetic field gradient at the junction of adjacent magnetic sheets, which can improve the electromagnetic induction sensitivity of the magnetic tube 33 without increasing the volume. The duckbill supports 32 are connected with the induction assembly 4;

[0032] The induction assembly 4 includes a cover shell 41 connected with the duckbill supports 32, and two magnetic rings 42 are embedded on the surface of the cover shell 41. The attractive force between the magnetic ring 42 and the magnetic tube 33 is greater than the minimum supporting force of the duckbill support 32, which can prevent the magnetic ring 42 from excessively attracting the magnetic tube 33 and causing the buffer frame 2 to fail to buffer the transmission of vibration when vibration occurs. There is a gap between the end of the annular protrusion 31 on the surface of the buffer frame 2 and the cover shell 41, which ensures that the buffer frame 2 will not be blocked by the cover shell 41 when it shakes. A magnetic separation sheet made of multiple layers of aluminum is arranged between the bracket 1 and the buffer frame 2 to reduce the impact of the magnetic tube 33 and the magnetic ring 42 on the sensor.

[0033] The cover shell 41 includes an external rectangular connecting frame and an internal circular bowl. The duckbill supports 32 are connected with the inner sidewall of the bowl of the cover shell 41, and the magnetic rings 42 are arranged on the inner wall surface of the bowl of the cover shell 41. The rectangular connecting frame of the cover shell 41 can be connected with the vehicle body to complete the installation and fixation of the overall structure at the required position. At the same time, the bowl of the cover shell 41 forms a recessed mounting space inside, and the remaining structures can be installed to reduce the volume of the overall device. The gap between the two magnetic rings 42 is matched with the two magnetic tubes 33, and the magnetic rings 42 and the magnetic tubes 33 attract each other.

[0034] The surface of the cover shell 41 is provided with a coil group 43, which is spaced apart from the magnetic pipes 33, and is composed of two cylindrical grid supports spaced apart from each other and coils wound outside the supports. The coils wound outside each grid support are distributed along the axial direction, and the two grid supports are staggered around the center. The number of coils in the coil group 43 is increased, and the two coils of the coil group 43 can be as close to the two magnetic pipes 33 as possible, so that electromagnetic induction can occur when the coil group 43 moves relative to the magnetic pipes 33. The coil group 43 is arranged between the two magnetic rings 42, and the end of the coil group 43 extends into the gap between the two magnetic pipes 33. The surface of the cover shell 41 is provided with an output line 44 connected to the coil group 43, and the end of the output line 44 is electrically connected to the central control device.

[0035] The working principle of the present application is as follows:

[0036] First, when a small vibration occurs during normal driving of the vehicle, the vibration is transmitted to the cover shell 41 through the vehicle body, and the cover shell 41 transmits the vibration to the buffer bracket 2 through the duckbill support 32. At this time, the magnetic pipes 33 on the surface of the buffer bracket 2 are attracted by the magnetic rings 42, so the movement range of the magnetic pipes 33 is limited, and the magnetic pipes 33 can move within the limited range under the limitation of the magnetic rings 42 when a slight vibration occurs. The movement range of the magnetic pipes 33 causes the buffer bracket 2 to move synchronously, but the annular protrusion 32 on the surface of the buffer bracket 2 is always pushed by the duckbill support 32 to quickly reset to the initial position after moving. During the whole process, the small vibration transmitted by the vehicle is buffered by the duckbill support 32 during transmission, reducing the influence of the vibration on the sensor and limiting the vibration within the acceptable range of the sensor as much as possible.

[0037] When the vehicle drives on a bumpy road and the vibration of the vehicle body is large, the vibration transmitted to the cover shell 41 acts on the duckbill support 32 and causes the buffer bracket 2 to vibrate greatly during transmission, so the buffer effect cannot be achieved. Under the large amplitude of the swing, the magnetic pipes 33 are separated from the attraction of the magnetic rings 42, and the magnetic pipes 33 move relative to the cover shell 41 and synchronously move relative to the coil group 43 arranged on the surface of the cover shell 41. The movement of the magnetic pipes 33 around the coil group 43 causes an electromagnetic reaction in the coil group 43, and an electric current is generated in the coil group 43. The size of the current increases or decreases according to the movement range of the magnetic pipes 33. The current in the coil group 43 is transmitted to the central control device through the output line 44, and the central control device selects the compensation amplitude of the sensor according to the size of the current, so as to ensure the normal work of the sensor.

[0038] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An adaptive vibration compensation device for an automotive intelligent sensor, comprising a bracket (1) for mounting the sensor, wherein a buffer frame (2) is bolted to the bracket (1), characterized in that: The buffer frame (2) is provided with a buffer assembly (3) on its surface, and the buffer frame (2) is connected to the sensing assembly (4) through the buffer assembly (3). The buffer assembly (3) includes an annular protrusion (31) on the surface of the buffer frame (2). The annular protrusion (31) forms a circular installation area on the surface of the buffer frame (2). Several duckbill brackets (32) are evenly spaced around the surface of the annular protrusion (31). Two concentric magnetic tubes (33) are provided on the surface of the buffer frame (2) inside the annular protrusion (31). A gap is left between the two magnetic tubes (33). The duckbill brackets (32) are connected to the sensing assembly (4). The sensing component (4) includes a cover shell (41) connected to the duckbill bracket (32). Two concentric magnetic rings (42) are embedded on the surface of the cover shell (41). The gap between the two magnetic rings (42) is adapted to the two magnetic tubes (33). The magnetic rings (42) and the magnetic tubes (33) attract each other. A coil group (43) is provided on the surface of the cover shell (41). The coil group (43) is located between the two magnetic rings (42). The end of the coil group (43) extends into the gap between the two magnetic tubes (33). An output line (44) connected to the coil group (43) is provided on the surface of the cover shell (41). The end of the output line (44) is electrically connected to the central control device.

2. The adaptive vibration compensation device for automotive intelligent sensors according to claim 1, characterized in that: The magnetic tube (33) is composed of several annular magnetic sheets stacked and bonded together in sequence with epoxy resin material, and the magnetic poles of each two adjacent magnetic sheets are opposite.

3. The adaptive vibration compensation device for automotive intelligent sensors according to claim 1, characterized in that: The cover shell (41) includes an outer rectangular connecting frame and an inner circular bowl-shaped component. The duckbill bracket (32) is connected to the inner wall of the bowl-shaped component of the cover shell (41), and the magnetic ring (42) is disposed on the inner wall surface of the bowl-shaped component of the cover shell (41).

4. The adaptive vibration compensation device for automotive intelligent sensors according to claim 1, characterized in that: The coil group (43) consists of two cylindrical grid-like supports with gaps between them and coils wound around the supports. The coils wound around each grid-like support are distributed along the axial direction, and the two grid-like supports are staggered along the center.

5. The adaptive vibration compensation device for automotive intelligent sensors according to claim 1, characterized in that: The attraction between the magnetic ring (42) and the magnetic tube (33) is greater than the minimum support force of the duckbill support (32).

6. The adaptive vibration compensation device for automotive intelligent sensors according to claim 3, characterized in that: There is a gap between the end of the annular protrusion (31) on the surface of the buffer frame (2) and the cover shell (41).

7. The adaptive vibration compensation device for automotive intelligent sensors according to claim 1, characterized in that: A gap is left between the coil group (43) and the magnetic tube (33).

8. The adaptive vibration compensation device for automotive intelligent sensors according to claim 1, characterized in that: The duckbill support (32) is always in a relaxed state.

9. The adaptive vibration compensation device for automotive intelligent sensors according to claim 1, characterized in that: A magnetic shielding sheet made of multiple layers of aluminum is provided between the bracket (1) and the buffer frame (2).

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