What are the factors that affect the ultrasonic sensor?

The following factors may affect the operation of the ultrasonic sensor, this article is for reference only.

One: range and size

The size of the detected object will affect the maximum effective range of the ultrasonic sensor. The sensor must detect a certain level of sound waves to be excited to output the signal. A larger object can reflect most of the sound waves to the sensor, so the sensor can be in it. The object is sensed to the maximum extent, while a small object can only reflect very few sound waves, thus significantly reducing the range of sensing.

Two: the measured object

The most ideal object that can be detected with an ultrasonic sensor should be a large, flat, high-density object that is placed vertically facing the sensor-sensing surface. The most difficult to detect are those made of very small areas, or materials that absorb sound waves, such as foam or corners facing the sensor. Some objects that are more difficult to detect can first teach the background surface of the object and then react to the object placed between the sensor and the background.

For the liquid measurement, the surface of the liquid is required to face the ultrasonic sensor vertically. If the surface of the liquid is very uneven and the fluctuation is large, the response time (St) of the sensor should be adjusted longer, and it will average these changes. It can minimize the impact of very uneven and large fluctuation factors on the measurement results.

Three: vibration

Whether the vibration of the sensor itself or the surrounding machinery affects the accuracy of the distance measurement, some damping measures can be taken. For example, using a rubber anti-vibration device to make the base of the sensor can reduce the vibration, and the fixed rod can also be used. Eliminate or minimize vibration. Attenuation When the ambient temperature changes slowly, the temperature-compensated ultrasonic sensor can make adjustments, but if the temperature changes too fast, the sensor will not be able to make adjustments.

Four: 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 sound reflection must be reduced or eliminated. In order to avoid false detection of surrounding objects, many ultrasonic sensors have a The LED indicator is routed to the operator for installation to ensure that the sensor is properly installed and reduces the risk of errors.

The ultrasonic sensor emits a high-frequency sound pulse that is inaudible to the human ear and measures the time difference between the signal being emitted and being emitted back by the object. Rugged ultrasonic sensors have successfully demonstrated their superior performance in a variety of applications, especially for non-contact object measurement or inspection. This can also be used in very harsh working environments. The most impressive feature is the ability to accurately detect substances and colors (not affected by materials and colors).

Basic principles of using ultrasonic sensors:

The ultrasonic sensor uses the vibration of the vibrating ceramic of the sensor head to generate a high-frequency (invisible to the human ear) sound wave. If the sound wave hits an object and the object is reflected back, the sensor can receive the echo. The sensor determines the distance between the sensor probe and the object based on the wavelength of the sound wave and the time difference between the transmitted and received echoes. For a typical application, a sensor can be set to both near and far by the button settings, regardless of the object within which the sensor can detect it. For example, the ultrasonic sensor can be mounted on a liquid-filled tank, or a small ball-filled box, which emits sound waves to the container. By receiving the return wave for a long time, it can be determined that the container is full or empty. It is partially full.

The ultrasonic sensor can also be an on-beam type, ie a separate transmitter and receiver. This type of on-beam or split-type ultrasonic sensor is ideal for detecting slow moving objects, or when it needs to respond quickly or in a humid environment. Ultrasonic sensors are preferred when detecting transparent or colored objects, liquids, and detecting surfaces of smooth, rough, shiny, translucent materials, and detecting irregular objects.

影响超声波传感器的因素有哪些

Creative Erasers

Creative Erasers,Creative Star Shaped Eraser,Creative Cartoon Animal Erasers,Creative Rubber Erasers

Shaoxing Daling Stationery Co., Ltd. , https://www.sxdaling.com