Find an expository essay on biomimicry

The rocket lift-off uses the jellyfish, cuttlefish recoil principle.

1. Bats and radar

Bats emit a kind of ultrasound wave that comes back when it encounters an object, but humans can't hear it. Radar was invented based on this property of bats. Radar is used in a variety of places, such as airplanes, aviation, etc.

2. Electronic frog eyes

According to the visual principle of frog eyes, people have successfully developed electronic frog eyes. This electronic frog eye can identify objects of a specific shape with the same accuracy as a real frog eye. After the electronic frog eye is installed in the radar system, the anti-jamming ability of the radar is greatly improved.

This radar system can quickly and accurately identify specific shapes of aircraft, ships, missiles, etc. In particular, it can distinguish between real and fake missiles and prevent the real from being confused with the real.

3. Jellyfish's downwind ears and jellyfish ear storm ** instrument

The downwind ears of jellyfish, imitating the structure and function of jellyfish ears, designed the jellyfish ear storm instrument, which can make a forecast of the storm 1 5 hours in advance, which is of great significance to the safety of navigation and fishery.

4. Fireflies and artificial cold light

In nature, the light emitted by fireflies does not produce heat, so it is also called "cold light". The cold light emitted by fireflies not only has a high luminous efficiency, but also the cold light emitted is generally very soft, which is very suitable for human eyes, and the intensity of the light is relatively high.

5. Electric fish and volt battery

This extraordinary ability of electric fish has aroused great interest among scientists. At the beginning of the 19th century, the Italian physicist Volt designed the world's first battery based on the electric fish power generation organ.

Around 18 years ago, Kelly, a British scientist and one of the founders of aerodynamics, imitated the spindle shape of trout and mountain sandpiper and found a streamlined structure with little resistance. Kelly also designed a wing curve that imitated a bird's wing, which greatly contributed to the birth of aviation technology. At the same time, the French physiologist Marre, who carefully studied the flight of birds, described the relationship between the weight of birds and the area of their wings in his book "The Machine of Animals".

The German Helmholtz also found from the study of flying animals that the weight of flying animals is proportional to the cube of the linearity of the body. Helmholtz's research points to the limitations of the body size of flying objects. Through detailed study and careful imitation of the flight organs of birds, according to the principle of bird flight mechanisms, a glider capable of manned flight was finally created.

Later, the designers designed the cantilever of the excavator based on the shape of the crane, and during the First World War, people took inspiration from the wild boars that survived the gas war, and designed gas masks that imitated the noses of wild boars. What are the principles used in the floating and flexible submarine in the ocean? Although we have no evidence to examine whether the submarine designers consulted the biological world when designing the submarine, it is not difficult to assume that the designers must have understood that the swim bladder is an important organ used by fish to change the specific gravity of the body with the water, so that it can sink and float in the water.

Frogs are amphibians, and sports workers have carefully studied the movement posture of frogs in the water and summed up a set of low-effort, fast swimming movements - breaststroke. In addition, the webs made for divers are almost exactly shaped like the frog's hind limbs, which greatly improves the diver's mobility in the water.