Design and realization of ultrasonic locating systemin the classroom environment
碩士 === 元智大學 === 電機工程學系 === 93 === An active system based on the active ultrasonic signal and time difference of arrival (TDOA) method is proposed to track the teacher in the classroom environment. The teacher pick up a ultrasonic emitter, whereby the ultrasonic signal is recived by square ultrasonic...
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2005
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| Online Access: | http://ndltd.ncl.edu.tw/handle/20369728850076066293 |
| Summary: | 碩士 === 元智大學 === 電機工程學系 === 93 === An active system based on the active ultrasonic signal and time difference of arrival (TDOA) method is proposed to track the teacher in the classroom environment. The teacher pick up a ultrasonic emitter, whereby the ultrasonic signal is recived by square ultrasonic detectors array on the classroom wall. Tracking the ultrasonic emitter source in a three-dimensional classroom environment needs four modules of square ultrasonic detector array. This system adopts a fast calculations schema to locate the sound source. Without solving difficult calculations of simultaneous for linear equations of hyperbola; the new schema combines TDOA method and angle of arrival method to archive the desired goal. In the future we expect to offer immediately and correct location information to drive the equipment of camera, follow the tracking of the teacher.
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