WORKING PRINCIPLE
SUU360 Ultrasonic Underwater Obstacle Avoidance Sensor emits ultrasonic waves. During propagation, these waves are reflected when they encounter interfaces between different media or obstacles within the same medium, and are then received by the sensor.
The circuit knows both the time of emission and the time of reception.
The distance to the interface or obstacle is calculated as follows: Distance is measured in meters (m); the speed of sound is measured in meters per second (m/s); and propagation time is measured in seconds (s). Because the speed of sound in liquids or solids is directly related to temperature, temperature compensation is required in specific environments to determine the exact speed of sound in meters per second based on the temperature.
APPLICATION
1. Liquids: The sensor is available in three housing materials: ABS, 304 stainless steel, and 316 stainless steel.
The liquid must be non-corrosive to these three housing materials and be capable of effectively conducting ultrasonic waves.
Unsuitable liquids for ultrasonic wave conduction:
① Liquids with an air bubble content exceeding 0.1%;
② Liquids with a solid particulate matter content exceeding 0.1%;
③ Liquids with a suspended solids content exceeding 1%.
The above description of “unsuitable liquids for ultrasonic wave conduction” applies only to this product. Using a larger-sized ultrasonic underwater ranging sensor will allow measurements in liquids with slightly higher concentrations of air bubbles, solid particulate matter, and suspended solids.
2. Solids: The solid must be non-corrosive to these three housing materials and be capable of effectively conducting ultrasonic waves. The solid must be dense and free of air bubbles.
Unsuitable solids for ultrasonic wave conduction:
① Solids containing air bubbles;
② Solids containing solid particulate matter or fibers;
③ Solids with linings or layers.
In the following types of solids, the sensor cannot properly measure the internal liquid level through the solid.
For example: fiberglass, PE, enamel, metal cans with rubber lining, metal cans with anti-corrosion coating, metal cans with PTFE lining, metal cans with wear-resistant lining, etc.
