National Taiwan University

Tung Thih Electronic Co., Ltd.

Chuin-Shan Chen

Chih-Kung Lee

Wen-Jong Wu

Chia-Yu Lin

Chih-Chiang Cheng

Chung-Ting Ko

Wen-Hsin Hsiao

An-Bang Wang

Wen-Pin Shih

Chih-Chieh Chen

I-Chun Lin

Wen-Shiang Chen

Tzong-Lin Jay Shieh

Pei-Zen Chang

Fei-Yau Lu

Jay Shieh

Jen-Hsuan Ho

Liang-Jenq Leu

Wen-Chin Tsai

Chia-Fong Lee

Yao-Tien Huang

Shieh Jay

Lee Chih-Kung

Yuan-Ping Liu

The method of changing ultrasound wave frequency by using the acoustic matching layer presents a replaceable acoustic matching layer to offer an effective means of filtering the original broadband frequency of an ultrasonic transducer into certain composite discontinuous frequencies. The filtering effect could be improved by connecting the electrodes of the acoustic matching layer when it is made of a poled piezoelectric material. This method may provide novel applications for commercial ultrasonic transducers.

Method for changing ultrasound wave frequency by using the acoustic matching layer

An ultrasonic distance-measuring sensor assembly and an ultrasonic distance-measuring sensor thereof are disclosed. The ultrasonic distance-measuring sensor includes at least two piezoelectric actuators and a member. The member includes a side wall, at least two vibration generating/receiving surfaces and a partition. The vibration generating/receiving surfaces accommodate the piezoelectric actuators as sources. The side wall surrounds the vibration generating/receiving surfaces. The partition is disposed between the vibration generating/receiving surfaces and includes a slot. The slot is disposed between the vibration sending/receiving surfaces.

Ultrasonic distance-measuring sensor with gap and partition between vibrating surfaces

A device for adjusting a temperature and a humidity using a wind power is provided. The device includes an inlet; an outlet connected to the inlet; a sprayer spraying a nebulized liquid into the device; and an airflow sensor electrically connected to the sprayer for activating the sprayer when an airflow passes through.

Device for adjusting temperature and humidity using wind power

An ultrasound transducer has a cup-shaped casing. The cup-shaped casing has a sidewall. A cross section of an inner surface of the sidewall being perpendicular to a central axis of the ultrasound transducer substantially shows a dumbbell-shaped contour. The dumbbell-shaped contour has a pair of opposite straight-line sections being substantially parallel to a longitudinal axis of the dumbbell-shaped contour and a pair of opposite arc sections being located respectively at two ends of the longitudinal axis of the dumbbell-shaped contour and respectively forming two enlarged portions of the dumbbell-shaped contour. Two ends of each arc section of the dumbbell-shaped contour respectively joint the straight-line sections through two curve sections and each curve section is connected to one end of the arc section and one straight-line section. At least one enlarged area of a dumbbell-shaped surface of an inside bottom surface has a recessed portion.

Ultrasound transducer with a dumbbell-shaped chamber

Growing community of inventors

Taipei, Taiwan

Chuin-Shan Chen