Because they move at night or in the sea with poor eyesight, they can't rely on visual positioning, so they have evolved the ability of ultrasonic positioning.
There are many similar things inspired by animals. For example, the eyes of insects are compound eyes. According to the principle of insect eyes, people have made fly-eye cameras, which are used to print and copy a large number of tiny circuits of electronic computers, greatly improving the work efficiency and quality;
The shape of submarine imitates whale, and its working principle imitates swim bladder. According to the visual principle of frog eye, the electronic frog eye was invented. Radar is made according to the echolocation system of bats.
Sonar, also known as sonar, is an acoustic detection device, which uses the propagation and reflection characteristics of sound waves in water to navigate and range through electroacoustic conversion and information processing.
Sonar is the main technology used by navies of various countries in underwater surveillance, which is used to detect, classify, locate and track underwater targets. Conduct underwater communication and navigation, and ensure the tactical maneuvering of warships, anti-submarine aircraft and anti-submarine helicopters and the use of underwater weapons.
1, people invented sonar based on dolphins and bats.
2. Bats and dolphins use the method of transmitting and receiving ultrasonic waves, that is, echolocation to determine the position and distance of the target.
According to the principle of echolocation, scientists invented sonar.
4. Because of the high attenuation rate of electromagnetic wave in water, it can't be used as the signal source for detection, so it is the most widely used means to detect artificial objects under the water surface with acoustic waves.