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To estimate the mass emissions of combustion sources, the accurate determination of the exhaust mass flow with reasonable time resolution is a key requirement. State of the art flowmeters are often based on the measurement of the time of flight of ultrasonic bursts. Such systems are not well suited for harsh environment due to the fact that they expose their sensitive Piezo-transceiver directly to...
In order to solve the short distance ultrasonic distance measuring device, measurement accuracy is low, the circuit complex and technically difficult, and difficult to debug and other shortcomings. Article Atmega 16 microcontroller as the core, developed a high-precision, real-time response to, a good man-machine interface, communication ability of the ultrasonic range finder. This paper introduces...
Ultrasonic Ranging System is different precision when it has been used in an occasion. Generally its errors are larger and often can not meet the application requirements. In this paper, new ultrasonic ranging system which can be used to non-contact measure distance in special occasion was designed by single-chip, ultrasonic ranging technology and sensor technology. Distance measurement data and temperature...
In this report, a measurement method for cross-sectional temperature and wind velocity distribution is discussed. A novel method based on an acoustic CT technique is proposed. Specifically, the temperature and the wind velocity distributions are estimated simultaneously using the time of flight data of several ultrasonic propagation paths. The temperature and the wind velocity effects can be distinguished...
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