High-sensitivity waterproof ultrasonic sensor
By designing a high-sensitivity waterproof ultrasonic sensor to reduce beam angle and improve sensitivity, the existing ultrasonic sensors have solved the problems of low sensitivity and easy to cause false alarms, achieving a longer detection distance and a higher product level.
Patent Information
- Application Number
- CN202421920830.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The existing ultrasonic sensors have low sensitivity, resulting in a close distance between the farthest detection and large beam angles, which can easily cause false alarms, especially in winter or rain.
A high-sensitivity waterproof ultrasonic sensor is designed. By reducing the beam angle by 5-10°, the sensitivity is increased by more than 30%, the core and shell are set at a certain distance to prevent false alarms when frozen or raining in winter, and stainless steel shrapnel is used instead of silicone columns to improve beauty and product grade.
A longer detection distance and smaller beam angle are achieved, the sensor sensitivity is improved, the false alarm problem is avoided when freezing or raining in winter, and the beauty and grade of the product are improved.
Smart Images
Figure CN223038179U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ultrasonic sensors, in particular to a high-sensitivity waterproof ultrasonic sensor. Background Technique
[0002] The ultrasonic sensors used in robots, driverless vehicles, and automatic parking on the market have low sensitivity, resulting in a relatively short maximum detection distance. The large beam angle of the ultrasonic sensor makes it easy to detect small objects on the ground when the installation position is a little lower from the ground, causing false alarms. Therefore, the utility model proposes a high-sensitivity waterproof ultrasonic sensor to solve the above problems. Content of the Utility Model
[0003] The purpose of the utility model is to solve the problems raised in the prior art, and to provide an obstacle avoidance sensor applicable to robots, driverless vehicles, automatic parking, etc. The beam angle of the sensor is reduced by 5-10°, the sensitivity is increased by more than 30%, there is a certain distance between the probe core and the shell, it is not easy to freeze in winter, and rainwater is not easy to connect the probe core and the shell to cause false alarms when it rains. Four stainless steel shrapnel are used to fix the probe instead of silicone columns to improve the appearance and product grade. To achieve the above purpose, the utility model adopts the following technical scheme: a high-sensitivity waterproof ultrasonic sensor, including a shell, a cavity is arranged inside the shell, a silicone sleeve is arranged inside the cavity, a probe core matching with the silicone is arranged inside the silicone sleeve, and a signal transmitting and receiving surface, a piezoelectric ceramic combination, wires, a connector and a filler located inside the probe core are arranged inside the probe core.
[0004] Further, the working surface for transmitting and receiving ultrasonic waves is the surface of the probe core and 1.5 mm below the surface of the probe core. Further, all the transmitting and receiving surfaces of the probe core are arranged outside the shell, and the distance between the working surfaces for transmitting and receiving ultrasonic waves around the probe core and the inner wall of the shell is at least 2 mm. Further, the silicone sleeve wraps the probe core, and after the working surface for transmitting and receiving ultrasonic waves of the probe core is exposed, it is installed inside the shell. Further, three steps are arranged on the upper surface of the shell, and the steps form a radiation horn mouth. Further, the probe is fixed on the side of the shell through a stainless steel patch. Compared with the prior art, the advantages and positive effects of the utility model are as follows: the beam angle of the high-sensitivity waterproof ultrasonic sensor is reduced by 5-10°, three steps are arranged on the upper surface of the shell, and the steps form a radiation horn mouth, which can gather ultrasonic energy and increase the sensitivity by more than 30%; there is a certain distance between the probe core and the shell, it is not easy to freeze in winter, and rainwater is not easy to connect the probe core and the shell to cause false alarms when it rains; four stainless steel shrapnel are used to fix the probe instead of silicone columns to improve the appearance and product grade. Description of the Drawings
[0005] Figure 1 It is a three-dimensional structure schematic diagram of the utility model; Figure 2Schematic diagram of the side structure of the present utility model; Figure 3 Schematic diagram of the stainless steel patch structure of the present utility model. Legend: 1. Outer shell, 2. Cavity, 3. Silicone sleeve, 4. Probe core, 5. Stainless steel patch. Specific embodiments
[0006] In order to more clearly understand the above objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other. In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited to the limitations of the specific embodiments disclosed in the following specification. As Figures 1-3 shown, the present utility model provides a highly sensitive waterproof ultrasonic sensor, including an outer shell 1, a cavity 2 is provided inside the outer shell 1, a silicone sleeve 3 is provided inside the cavity 2, a probe core 4 matching with the silicone 3 is provided inside the silicone 3, and a signal transmitting and receiving surface, a piezoelectric ceramic assembly, a wire, a connector and a filler located inside the probe core 4 are provided inside the probe core 4,
[0007] The surface of the probe core 4 and the area 1.5 mm below the surface of the probe core 4 are the working surfaces for transmitting and receiving ultrasonic waves. The transmitting and receiving surfaces of the probe core 4 are all arranged outside the housing 1. The distance between the working surfaces for transmitting and receiving ultrasonic waves around the probe core 4 and the inner wall of the housing 1 is at least 2 mm. This distance is large enough so that when there are water droplets, the water droplets cannot connect the inner wall of the housing 1 and the working surfaces for transmitting and receiving ultrasonic waves of the probe core 4. If they are connected, it will affect parameters such as the frequency of the probe core. In this way, it can be ensured that rainwater does not affect the probe core 4 from outputting distorted signals. At the same time, when it freezes in winter, the ice cannot connect the housing 1 and the working surfaces for transmitting and receiving ultrasonic waves of the probe core 4. After this distance is designed to be large, when the ultrasonic echo is reflected to the upper surface of the housing and then reflected to the working surface for transmitting and receiving ultrasonic waves of the probe core 4, there will be fewer waves. The beam angle of the ultrasonic sensor will also become smaller. The probe core 4 is wrapped by the silica gel sleeve 3. After the working surfaces for transmitting and receiving ultrasonic waves of the probe core 4 are exposed, it is then installed into the housing 1. The silica gel sleeve 3 has a very good damping effect, avoiding resonance caused by direct contact between the probe core 4 and the housing 1. At the same time, the silica gel sleeve 3 also has a waterproof function, and rainwater cannot enter the interior of the housing through the surface of the probe core 4. There are three levels of steps arranged on the upper surface of the housing 1. The steps form a radiation horn mouth, and the horn mouth can gather ultrasonic energy, increasing the sensitivity by more than 30%. The probe is fixed on the side of the housing 1 through the stainless steel patch 5. In the market, the probe is fixed through the silica gel column on the side of the probe housing. By changing the silica gel column to a stainless steel patch, the appearance is more beautiful and the grade is higher. The above is only the preferred embodiment of the present invention, and it is not a limitation to the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims
1. A highly sensitive waterproof ultrasonic sensor, comprising a housing (1), characterized in that: The housing (1) is provided with a cavity (2), the cavity (2) is provided with a silicone sleeve (3), the silicone sleeve (3) is provided with a matching probe core (4), the probe core (4) is provided with a transmitting and receiving signal surface, a piezoelectric ceramic assembly, wires, a connector and a filler located in the probe core (4).
2. A highly sensitive waterproof ultrasonic sensor according to claim 1, characterized in that: The surface of the probe core (4) and a position 5 mm below the surface of the probe core (4) are working surfaces for transmitting and receiving ultrasonic waves.
3. A highly sensitive waterproof ultrasonic sensor according to claim 1, characterized in that: The transmitting and receiving surfaces of the probe core (4) are all arranged outside the housing (1), and the distance between the transmitting and receiving ultrasonic wave working surfaces around the probe core (4) and the inner wall of the housing (1) is at least 2 mm.
4. A highly sensitive waterproof ultrasonic sensor according to claim 1, characterized in that: The silicone sleeve (3) wraps the probe core (4) and is then installed into the housing (1) after exposing the working surface of the probe core (4) for transmitting and receiving ultrasonic waves.
5. The high-sensitivity waterproof ultrasonic sensor according to claim 1, characterized in that: The upper surface of the housing (1) is provided with three steps, and the steps form a radiation horn.
6. A highly sensitive waterproof ultrasonic sensor according to claim 1, characterized in that: The probe is fixed on the side of the housing (1) via a stainless steel patch (5).