What are the factors that affect the effect of ultrasonic wind transducer sensors?

In the application of ultrasonic weather transducer sensors, the effect of application in the different environments is different. For example, the data displayed on the roof of an empty tall building and on the roof of a low building are different. Let's take a look at some environmental factors that affect the effect of piezoelectric ultrasonic transducer.

1. Range and size

The size of the detecting object will affect the maximum effective range of the ultrasonic sensor. The ultrasonic sensor must detect a certain water level of sound waves to be excited and output signals. A larger object can reflect most of the sound waves to the ultrasonic sensor, so the ultrasonic sensor can be in its this object can be sensed to the maximum extent, and a small object can only reflect very few sound waves, which significantly reduces the range of sensing.

 

2. Measuring object

The most ideal object that can be detected by an ultrasonic wind speed measurement should be a large, flat, high-density object, which is placed vertically facing the sensing surface of the ultrasonic sensor. The most difficult thing is to detect are those that are very small in area, or pzt materials that can absorb sound waves, such as foamed plastic, or have corners facing the sensor. Some objects that are more difficult to be detected can be taught on the background surface of the object first, and then react to the object placed between the ultrasonic sensor and the background.

 

When it is used for liquid level measurement, the surface of the liquid needs to face the ultrasonic sensor vertically. If the surface of the liquid is very uneven and fluctuates greatly, the response time (St) of the ultrasonic sensor should be adjusted longer, and it will average these changes. , which it can minimize the impact of very uneven and large fluctuation factors on the measurement results.

 

3. Vibration

Whether it is the vibration of the ultrasonic sensor itself or the surrounding machinery, it will affect the accuracy of the ultrasonic distance measurement. At this time, you can consider some shock absorption measurement. For example, use rubber anti-vibration equipment to make a base for the ultrasonic sensor to reduce vibration. You can also use a fixed rod. Eliminating or minimize vibration and attenuation .When the ambient temperature changes slowly, the temperature-compensated ultrasonic sensor can make adjustments, but if the temperature changes too fast, the ultrasonic sensor will not be able to make adjustments.

 

4. Misjudgment

Sound waves may be reflected by some nearby objects, such as guide rails or fixed fixtures. In order to ensure the reliability of detection, the influence of surrounding objects on the reflection of sound waves must be reduced or eliminated. In order to avoid false detection of surrounding objects, many ultrasonic sensors have a The LED indicator is used to guide the operator to install to ensure that the sensor is installed correctly and reduce the risk of error.

 

Ultrasonic transducer wind vane emits high-frequency sound pulses that cannot be heard by human ears, and measure the time difference between when the signal is emitted and when it is emitted by the object. Rugged ultrasonic sensors have successfully demonstrated their superior performance in various occasions, especially non-contact object measurement or detection. This can also be used in very harsh working environments. The most impressive performance is that it can accurately detect substances of various materials and colors (not affected by materials and colors).