摘要
利用超声波探头测量液位时,因为在水中超声波传输速度会随温度的变化而变化,使测量的准确度降低。利用AD590温度传感器和P89LPC935中的AD转换器测量温度,准确计算出声速,进而准确地测量出液位。
Ultrasonic detector is used to measure liquid level. The accuracy of measurement may be reduced because the velocity of Ultrasonic wave in water can be changed along with temperature. Temperature can be acquired by means of the temperature sensor AD590 and the ADC unite within P89LPC935, The velocity can be calculated by temperature measurement. Then liquid level can be detected accurately as a result.
出处
《东莞理工学院学报》
2005年第3期77-80,共4页
Journal of Dongguan University of Technology
