An ultrasonic near-field detection system

Abstract

An ultrasonic near-field detection system comprising: a housing body having an accommodating space; and a sensor assembly disposed in the accommodating space of the housing body and comprising a first sensor and a second sensor; wherein the first sensor has a first electrical leg, and the first vertical surface is generated by vertically extending from a mid-position of the connection of the first electrical leg, and the second sensor has a second electrical leg, and the second vertical surface is generated by vertically extending from a mid-position of the connection of the second electrical leg; wherein the third vertical plane is generated by the center axis of the first sensor and the center axis of the second sensor, wherein the first vertical plane forms a first angle with the third vertical plane, and wherein the second vertical plane forms a second angle with the third vertical plane; and wherein the range of the first angle and the second angle is between

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