超声波相位比较法的风速风向传感器设计

Design of Wind Speed and Direction Sensor Based on Ultrasonic Phase Comparison Method

针对自然环境中风速风向的准确识别,利用超声波原理设计了风速风向双参数传感器检测系统。系统中超声波产生以及接收采用频率为213 kHz的超声波换能器,超声波传感器利用超声波相位差法测量风速风向,详细阐述了二维相位差法的测量原理和计算方式,并通过Lissajous曲线验证了该方法的可行性。系统中运用功能相同的数字芯片替换复杂模拟电路提高了传感器的集成度。在风箱中的测试结果表明,信号经鉴相电路处理并通过与ZRQF铂电阻丝式风速传感器进行对比测量后,验证了其处理速度和精度,所设计的超声波风速风向测试系统在气体流向检测以及环境监测等方面具有实际有效的使用价值。

Aiming at the accurate identification of wind speed and direction in the natural environment,the wind speed and direction two-parameter sensor detection system was designed by ultrasonic principle.The ultrasonic wave is generated in the system and the ultrasonic transducer with frequency 213 kHz is used.The ultrasonic sensor uses the ultrasonic phase difference method to measure the wind speed and direction.The measurement principle and calculation method of the two-dimensional phase difference method are elaborated.The method is verified by Lissajous curve.Feasibility.Replacing complex analog circuits with the same digital chip in the system improves sensor integration.The test results in the bellows show that the signal is processed by the phase-detection circuit and compared with ZRQF platinum resistance wire type wind speed sensor to verify the processing speed and accuracy.The designed ultrasonic wind speed and direction test system in the gas flow direction detection and environment monitoring and other aspects have practical and effective detection and environmental monitoring.