超声波物位计

超声波物位计的工作原理是由换能器（探头）发出高频超声波脉冲遇到被测介质表面被反射回来，部分反射回波被同一换能器接收，转换成电信号。超声波脉冲以声波速度传播，从发射到接收到超声波脉冲所需时间间隔与换能器到被测介质表面的距离成正比。此距离值S与声速C和传输时间T之间的关系可以用公式表示:S=CxT/2。

 由于发射的超声波脉冲有一定的宽度，使得距离换能器较近的小段区域内的反射波与发射波重迭，无法识别，不能测量其距离值。这个区域称为测量盲区。盲区的大小与超声波物位计的型号有关。

The working principle of an ultrasonic level meter is that high-frequency ultrasonic pulses emitted by a transducer (probe) are reflected back from the surface of the measured medium, and some of the reflected echoes are received by the same transducer and converted into electrical signals. Ultrasonic pulses propagate at the speed of sound waves, and the time interval required from emission to reception of ultrasonic pulses is proportional to the distance from the transducer to the surface of the measured medium. The relationship between this distance value S, sound speed C, and transmission time T can be expressed by the formula: S=CxT/2.

Due to the certain width of the emitted ultrasonic pulse, the reflected and emitted waves in a small area close to the transducer overlap, making it difficult to identify and measure their distance value. This area is called the measurement blind spot. The size of the blind spot is related to the model of the ultrasonic level meter.

由于采用了先进的微处理器和独特的EchoDiscovery回波处理技术，超声波物位计可以应用于各种复杂工况。

  “虚假回波学习”功能使得仪表在多个虚假回波的工况下，可正确地确认真实回波，获得准确的测量结果。换能器内置温度传感器，可实现测量值的温度补偿。超声波换能器采用最佳声学匹配之专利技术，使其发射功率能更有效地辐射出去，提高信号强度，从而实现准确测量。

Due to the use of advanced microprocessors and unique EchoDiscovery echo processing technology, ultrasonic level meters can be applied to various complex working conditions.

The "false echo learning" function enables the instrument to correctly confirm the true echo and obtain accurate measurement results under multiple false echo conditions. The transducer

 is equipped with a built-in temperature sensor, which can achieve temperature compensation for measured values. The ultrasonic transducer adopts patented technology with the best acoustic matching, enabling its emission power to be more effectively radiated, improving signal strength, and achieving accurate measurement.

应用:各类工业领域的液位测量，特别是水处理工业。

Application

测量范围:液体:0.25…4m

Measurement range: liquid

过程连接:G1  1/2A

Process Connection

换能器外壳材料:PTFE、PU/PC

Material of transducer housing

过程温度:-40--70℃

Process temperature

过程压力:-0.2--1bar

Process pressure

信号输出:两线制/四线制4--20mA/HART

Signal output