A Method of the Untouched Ultrasonic Liquid Level Measurement With High Precision
In order to improve the precision of the ultrasonic liquid level measurement in the airtight container,the principle of ultrasonic distance measurement is described and the main error sources are analyed. In views of the error sources,the ultrasonic emission circuit which is propitious to reduce the blind distance, the temperature measured circuit which amends the ultrasonic velocity, the automatic gain regulated circuit which compensates the ultrasonic attenuation are designed and the method which checks up the preceding edge of echo by setting up the double compared values was used in the software, which contribute to enhance the measurement precision. Experiment shows that the ultrasonic liquid level apparatuses which adopt these methods have the higher precision, its circuits is simpler,easier implement than the others.
ultrasonic blind distance gain regulated
Minjuan Zhang Shiwei Li
Key Laboratory of Intrumentation & Dynamic Measurement, Ministry of Education,North University of China Photoelectric Information and Equipment Engineering Research Centers, North University of China Taiyuan, China
国际会议
太原
英文
144-147
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）