An acoustic positioning system using demodulated signals of an FM ultrasonic wave

Mitome, Hideto; Koda, T.; Shibata, Shuji

doi:10.1109/joe.1985.1145102

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2008

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Cited by 3 publications

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Design of a CMOS Low-Voltage Low-Power Circuit for an Integrated Pulsed Ultrasonic Distance Measurement System

Timischl

Inoue

Tsuneda

2006 IEEE International Symposium on Circuits and Systems

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The design of a mixed-signal CMOS low-voltage for the use in portable and long-lived smart obstacle sensor low-power circuit for a compact-size pulsed ultrasonic distance systems. measurement system for obstacle detection is proposed. The presented mixed-signal CMOS circuit is completely realized with II. PRINCIPLE OF ULTRASONIC OBSTACLE DETECTION hardware components and does not employ microcontrollers.The whole circuit system works at a power supply of 0.9 V We adopt the 'Time-of-Flight method' to measure the and dissipates no more than 267 ,uW. SPICE simulations are distance between an ultrasonic emitter and a wave-reflecting performed to validate the designed performances.obstacle. Fig.1 shows a block diagram of the distance mea-

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