In the United States invented the perfect parking sensors

Researchers from the University of Minnesota have come up with an inexpensive sensor, which enables you to determine the distance to the nearest millimetre. Scientists from the United States have invented a sensor that can greatly facilitate the lives of drivers around the world. The device is a new type of parking sensors, which works on the principle of detecting the magnetic field, according to RBK-Daily. The fact of the matter is that any car has its own magnetic field, the main sources of which are elements in the electric generator, air conditioning system, speakers, etc. To recognize this field in a neighboring car, used anisotropic Magnetoresistive Sensors that contain silicon chips with a thick layer of nickel-iron alloy. They recognize the changes surrounding magnetic fields because of their approach or deletion changes the resistance. Technology allows not only to accurately determine the distance regardless of external conditions, but it's also very cheap-rate sensors does not exceed 10 dollars of United States. By the way, new sensors could be used not only as a-, but the security and support systems that are activated by, say, the airbag right before the collision.