What are the advantages and disadvantages of automotive ultrasonic sensor?

Advantages of automotive ultrasonic sensor:

1. Not affected by object color or transparency
The automotive ultrasonic sensor reflects sound off objects, so color or transparency doesn't affect the sensor's readings.
2. Can it be used in a dark environment?
Unlike proximity sensors that use light or cameras, dark environments do not affect the detection capabilities of an automotive ultrasonic sensor.
3. Not affected by dust, dirt or high humidity environment
While many sensors work well in these environments, there are still some sensors that produce incorrect readings, especially under extreme conditions, i.e. large accumulations of dust or water.
4. High accuracy in some applications
The automotive ultrasonic sensor has high accuracy in measuring the thickness and distance of parallel surfaces.
5. Penetration
The high sensitivity and penetrating power make it easier for the automotive ultrasonic sensor to detect the outside and also detect deep objects.
6. Strong anti-environmental interference: can be used in any lighting environment. Reliable performance under various lighting conditions such as indoor, outdoor and complex ambient light. Non-contact detection of light, smoke, dust, color, materials, etc. is possible, so automotive ultrasonic sensors are better than infrared sensors in some applications because they are not affected by smoke or black matter.
7. Wide range of applications: automotive ultrasonic sensor can be used for water level detection, drone applications, automatic obstacle avoidance applications, distance detection applications, etc.
8. Multi-purpose: presence or absence detection, level detection, position detection, distance detection, etc. It can meet the needs of most non-contact detection.

The automotive ultrasonic sensor also has some disadvantages:
1. Can't work in a vacuum
Since automotive ultrasonic sensors use sound to work, they simply cannot work in a vacuum because there is no air to transmit the sound.
2. Not suitable for underwater
3. Soft materials will affect the sensing accuracy
Objects covered in very soft fabrics absorb more sound waves, making it harder for the sensor to see the target.
4. Temperature changes of 5-10 degrees or more will affect the sensing accuracy
However, many manufacturers now offer temperature compensation, and these sensors can be calibrated for any changes in temperature, voltage, etc. at startup or before each range reading.
5. Small objects have difficulty reflecting sound waves
Objects may be too small to reflect enough sound waves back to the sensor to be detected.
6. Certain shapes make it difficult to capture reflected waves
The shape or position of certain objects can cause sound waves to bounce off the object, but away from the automotive ultrasonic sensor. When choosing an automotive ultrasonic sensor, one must pay attention to the above environment and application scenarios; finally, in general, distance measurement, liquid level detection in closed containers, obstacle detection, transparent object detection, automotive collision avoidance systems, medical imaging technology, etc. The fields are all scenes using the fist of the automotive ultrasonic sensor.