The invention relates to an ultrasonic sensor which comprises a probe core assembly, the probe core assembly comprises a probe core body and a shell, the shell wraps the probe core body, and the cross sectional area of at least one part of the shell is gradually reduced from a first end to a second end; the shell is provided with a first end and a second end, the decoupling ring is arranged outside the shell in a sleeving mode, and the matching layer is arranged on the second end. As the areas of the trapezoidal front end and the second end of the shell are smaller than the area of the first end, the probe core body with the same outer diameter has a smaller contact area with a vehicle mounting surface, and the effective working area of a vibration stop pad on the vehicle mounting surface can be increased, so that the interference of vehicle vibration on a detection signal is effectively reduced, and the detection sensitivity is improved. And the decoupling ring can further detect the sound interference signal of the shell to the probe core body, so that the signal-to-noise ratio and the distance measurement sensitivity are further improved, and the practicability of the ultrasonic sensor is improved.
本发明涉及一种超声波传感器,所述超声波传感器包括:探芯组件,所述探芯组件包括探芯本体及壳体,所述壳体包裹在所述探芯本体外,从所述第一端开始到所述第二端,至少一部分的所述壳体的横截面积逐渐减小;退耦环,所述退耦环套设于所述壳体外,匹配层,所述匹配层设置于所述第二端上。由于壳体的梯形前端,第二端的面积小于第一端的面积,在相同外径的探芯本体下,与车辆安装面有更小的接触面积,能够增加车辆安装面上止振垫的有效工作面积,从而有效减少车辆振动对检测信号带来的干扰,有利于提高检测灵敏度。并且退耦环能够进一步壳体对探芯本体的声干扰信号,从而进一步提高信噪比和测距灵敏度,提高超声波传感器的实用性。
Ultrasonic sensor and vehicle
超声波传感器及车辆
2022-11-08
Patent
Electronic Resource
Chinese
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