ULTRASONIC SENSOR

• Main Authors: KOJIMA EIJI, AOKI TAKASHI, TANEMURA TOMOKI, ISHII ITARU, KAMIYA TATSUYA
• Format: Patent
• Language: English; Japanese
• Published: 02.08.2021
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; PUBLIC ADDRESS SYSTEMS

To provide an ultrasonic sensor capable of suppressing the scattering of ultrasonic waves at a lid.SOLUTION: An ultrasonic sensor includes a case 50 in which an accommodating recess 51 is formed, a sensor unit 10 that is housed in the accommodating recess 51 of the case 50, and includes a plurality of ultrasonic elements 25 that transmit the exploration waves and receive the reflected waves reflected by an obstacle as the received waves, and a lid 80 that is arranged in the case 50 so as to close the accommodating recess 51 and constitutes the casing 40. The lid 80 is made of a perforated member in which a gap is formed in a structure so as to communicate a space inside the accommodating recess 51 and a space outside, and the scattering cross section defined by the average length of the structure and the average width of the gap is 1×10-5 m2 or less.SELECTED DRAWING: Figure 1 【課題】蓋部で超音波が散乱することを抑制できる超音波センサを提供する。【解決手段】収容凹部５１が形成されたケース５０と、ケース５０の収容凹部５１に収容され、探査波を送信すると共に、探査波が障害物で反射した反射波を受信波として受信する複数の超音波素子２５が形成されたセンサ部１０と、収容凹部５１を閉塞するようにケース５０に配置されてケーシング４０を構成する蓋部８０と、を備える。そして、蓋部８０は、構造体に収容凹部５１内の空間と外部の空間とを連通させる空隙が形成された多孔部材で構成されるようにし、さらに、構造体の平均長さと、空隙の平均幅とで規定される散乱断面積が１×１０−５ｍ２以下となるようにする。【選択図】図１