What are the advantages and disadvantages of ultrasonic sensors?

1. is not affected by the color or transparency of the object.

Ultrasonic sensors reflect the sound of objects, so color or transparency will not affect the reading of the sensors.

2. Can it be used in a dark environment?

Unlike proximity sensors that use light or cameras, dark environment will not affect the detection ability of ultrasonic sensors.

3. Not affected by dust, dirt or high humidity environment.

Although many sensors work well in these environments, some sensors still produce incorrect readings, especially under extreme conditions, that is, a large amount of dust or water accumulates.

4. It has high accuracy in some applications.

Ultrasonic sensors have high accuracy in measuring the thickness and distance of parallel surfaces.

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High sensitivity and penetrating power make it easier for ultrasonic sensors to detect external and deep objects.

6. Strong ability to resist environmental interference: it can be used in any lighting environment. It is reliable in indoor, outdoor, complicated ambient light and other lighting conditions. It can detect light, smoke, dust, color, materials and so on in a non-contact way, so in some applications, ultrasonic sensors are better than infrared sensors because they are not affected by smoke or black substances.

7. Wide application range: Ultrasonic sensors can be used for water level detection, unmanned aerial vehicle application, automatic obstacle avoidance application, distance detection application, etc.

8. Multipurpose: presence or absence of detection, level detection, position detection, distance detection, etc. It can meet the needs of most non-contact detection.

Ultrasonic sensors also have some disadvantages:

1. cannot work in vacuum.

Because the ultrasonic sensor works by sound, it can't work in vacuum at all, because there is no air to spread sound.

2. Not suitable for underwater

3. Soft materials will affect the sensing accuracy.

Objects covered with very soft fabrics will absorb more sound waves, making it difficult for sensors to see the target.

Above 4.5- 10 degree will affect the induction accuracy.

But now many manufacturers' products provide temperature compensation, and these sensors can be calibrated according to any changes in temperature and voltage. At startup or before each reading.

It is difficult for small objects to reflect sound waves.

The object may be too small to reflect enough sound waves back to the sensor to be detected.

6. Some specific shapes are difficult to capture reflected waves.

The shape or position of some objects will make the sound wave bounce off the object, but it will deviate from the ultrasonic sensor. When selecting ultrasonic sensors, we must pay attention to the above environment and application scenarios; Finally, in general, the fields of distance measurement, liquid level detection in closed containers, obstacle detection, transparent object detection, automobile collision avoidance system, medical imaging technology and so on are all scenes using ultrasonic sensor fists.