Long distance small angle ultrasonic sensor aluminum shell

Abstract

The utility model relates to a long distance small angle ultrasonic sensor aluminium shell belongs to ultrasonic sensor technical field. The aluminium shell includes cylindrical shell body, the top opening of shell body, shell bottom is closed, inside is the shell cavity of round rectangle, the top of shell body is formed flange plate outside turning, the shell bottom has recess respectively in the both ends of shell cavity. The ultrasonic sensor aluminium shell of utility model design reduces the thickness of shell body part position, weakens the vibration energy, reduces the FOV vertical angle of ultrasonic sensor, improves the detection precision.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted ultrasonic sensor technology, specifically to an aluminum housing for a long-distance, small-angle ultrasonic sensor. Background Technology

[0002] Ultrasonic sensors have a wide and important application in vehicles. However, existing ultrasonic sensors have a relatively large field of view (FOV). When used in confined spaces, these sensors may detect additional obstacles, leading to false alarms. When applied to automotive radar, due to the low mounting position, excessively large vertical angles can cause the sensor to unexpectedly detect ground echoes, resulting in false alarms. In specific applications such as aircraft ground sensing and long-range vehicle detection, sensors with smaller FOV detection angles are required. Current methods for reducing the FOV of ultrasonic sensors involve adjusting the dimensions of the mounting cavity inside the aluminum housing. Lengthening and widening the mounting cavity affects the horizontal and vertical angles of the sensor, thus reducing the FOV. However, achieving a smaller vertical angle is currently difficult due to limitations in the overall housing size. Simply increasing the length of the mounting cavity thins the aluminum housing, compromising mechanical strength and potentially causing external damage to the sensor's casing. Summary of the Invention

[0003] To address the problems in the existing technology, this utility model patent designs an aluminum shell for a long-distance, small-angle ultrasonic sensor, which solves the problem that the aluminum shell of the existing ultrasonic sensor has an excessively thin shell wall due to the need to reduce the FOV detection angle.

[0004] The technical solution adopted by this utility model is as follows: the aluminum shell includes a cylindrical shell with an open top and a closed bottom. The interior of the shell is a rectangular cavity. The top of the shell is turned outward to form a flange. The bottom of the shell has bottom grooves at both ends of the rectangular cavity to reduce the thickness.

[0005] Furthermore, circumferential grooves are respectively provided on the inner side of the shell wall at both ends of the circular rectangular shell cavity near the bottom of the shell to make the shell wall thickness thinner at these locations.

[0006] Furthermore, the top of the shell wall of the shell is cut on both sides of the circular rectangular shell cavity to form positioning platforms.

[0007] Furthermore, the sidewalls of the positioning platform have a straight structure, making the upper part of the entire shell also rectangular in shape.

[0008] Compared to existing technologies, the advancements of this patented design for a long-distance, small-angle ultrasonic sensor aluminum housing lie in the following: By incorporating bottom grooves at both ends of the housing's length, the thickness of the housing bottom is reduced, weakening the vibration energy at these locations. Consequently, the energy in the sensor's vertical direction is reduced after installation, resulting in a smaller FOV (Field of View). Furthermore, incorporating bottom grooves only at both ends of the base plate does not affect the overall strength of the housing bottom. The circumferential grooves at the bottom of both ends of the housing wall further reduce the sidewall thickness, further weakening the vibration energy at these locations. This, in turn, further reduces the energy in the sensor's vertical direction after installation, leading to a further reduction in the FOV. The outward-flaring flange at the top of the housing and the linear positioning platforms on both upper sides allow for precise positioning of the ultrasonic sensor during installation, preventing rotation after installation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the aluminum casing of a long-distance, small-angle ultrasonic sensor.

[0010] Figure 2 This is a top view of the aluminum shell structure.

[0011] Figure 3 This is a side view cross-sectional structural diagram of the aluminum shell.

[0012] Figure 4 This is an experimental data graph of the FOV detection angle of the acoustic wave sensor with the aluminum shell used in this embodiment.

[0013] In the figure, 1 is the shell, 2 is the bottom of the shell, 3 is the shell wall, 4 is the circular rectangular shell cavity, 5 is the positioning platform, 6 is the bottom groove, 7 is the circumferential groove, and 8 is the flange. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0015] like Figure 1 , 2As shown in Figure 3, this utility model patent designs an embodiment of an aluminum shell for a long-distance, small-angle ultrasonic sensor. In this embodiment, the aluminum shell includes a cylindrical shell 1, with an open top and a closed bottom 2. The interior of the shell 1 is a circular rectangular cavity 4. The length of the circular rectangular cavity 4 affects the vertical angle of the ultrasonic sensor; the longer the cavity, the smaller the vertical angle of the sensor's field of view (FOV), and vice versa. The width of the circular rectangular cavity 4 affects the horizontal angle of the ultrasonic sensor; the wider the cavity, the smaller the horizontal angle of the sensor's FOV, and vice versa.

[0016] The top of the shell 1 is turned outward to form a flange 8. At the same time, the upper part of the shell wall of the shell 1 is cut along the width direction of the circular rectangular shell cavity 4 to form positioning platforms 5. The side walls of the positioning platforms 5 are straight and parallel to the width direction of the circular rectangular shell cavity 4, so that the overall shape of the top of the shell 1 is also circular and rectangular.

[0017] The bottom 2 of the shell 1 is provided with bottom grooves 6 at both ends of the length direction near the rectangular shell cavity 4 to reduce the thickness. At the same time, the inner side of the shell wall 3 of the shell 1 is hollowed out at both ends of the length direction near the bottom 2 of the rectangular shell cavity 4 to form circumferential grooves 7 that reduce the thickness of the shell wall.

[0018] like Figure 4 As shown, when the aluminum shell of the long-distance small-angle ultrasonic sensor disclosed in this utility model patent is used, the vibration energy at their respective positions is reduced by setting the bottom groove 6 and the circumferential groove 7, which correspondingly reduces the energy in the vertical angle direction of the sensor, reduces the vertical angle of FOV, and makes the minimum vertical angle reach 30°.

[0019] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the claims and description of the present invention shall still fall within the scope of the present invention.

Claims

1. A long-range low-angle ultrasonic sensor aluminum housing, said aluminum housing comprising a cylindrical housing, the top end of said housing being open, the bottom of said housing being closed, characterized in that, The inside of the shell is a circular rectangular shell cavity, the top of the shell is outwardly flanged to form a flange, and the bottom of the shell is provided with a bottom groove at both ends of the circular rectangular shell cavity to thin the thickness of the bottom.

2. A long range low angle ultrasonic sensor aluminum housing as defined in claim 1, wherein, The inside of the shell is a circular rectangular shell cavity, the top of the shell is outwardly flanged to form a flange, and the bottom of the shell is provided with a bottom groove at both ends of the circular rectangular shell cavity to thin the thickness of the bottom.

3. A long range low angle ultrasonic sensor aluminum housing as defined in claim 2, wherein, The top of the shell wall is cut to form a positioning table at both sides of the circular rectangular shell cavity.

4. A long range low angle ultrasonic sensor aluminum housing as defined in claim 3, wherein, The side wall of the positioning table is a straight line structure, and the upper part of the entire shell also has a circular rectangular shape.

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