我想请教下大家,TDC1000的温度传感器一定要选择PT1000还有PT500嘛,可以选择别的传感器否?
If the RTD pin of TDC 1000 is not connected to the sensor, then how accurate is the measurement?If the temperature is collected with its own sensor and single chip microcomputer, combined with TDC1000, the distance measured by ultrasonic wave is accurate and inaccurate?
是的,您可以这么理解,声波通过介质的速度随介质温度的变化而变化,在某些应用中,飞行时间的误差是比较大,超声波距离计算公式如下:
因此测量距离的准确度取决于准确地测定介质中的声速,声速随温度变化,在20°C(68°F)的干燥空气中,声速为343 m/s,或2.91 s/km。有关声速和温度之间关系的更多信息,请参阅下面文档第3.4节