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A chirp is a signal in which the frequency increases (up-chirp) or decreases (down-chirp) with time. In some sources, the term chirp is used interchangeably with sweep signal . [ 1 ] It is commonly applied to sonar , radar , and laser systems, and to other applications, such as in spread-spectrum communications (see chirp spread spectrum ).
Systems may also include visual aids, such as LED or LCD readouts to indicate object distance. A vehicle may include a vehicle pictogram on the car's infotainment screen, with a representation of the nearby objects as coloured blocks. Rear sensors may be activated when reverse gear is selected and deactivated as soon as any other gear is selected.
The U.S. Air Force's Commercially Hosted Infrared Payload (CHIRP) flight demonstration program is a wide field-of-view, passive infrared sensor on a commercial GEO launched by SES in 2011. The experiment supports an infrared sensor system development and is essential to reducing technology risk for the Third Generation Infrared Surveillance ...
In digital communications, chirp spread spectrum (CSS) is a spread spectrum technique that uses wideband linear frequency modulated chirp pulses to encode information. [1] A chirp is a sinusoidal signal whose frequency increases or decreases over time (often with a polynomial expression for the relationship between time and frequency).
Surface acoustic wave sensors are a class of microelectromechanical systems (MEMS) which rely on the modulation of surface acoustic waves to sense a physical phenomenon. The sensor transduces an input electrical signal into a mechanical wave which, unlike an electrical signal, can be easily influenced by physical phenomena.
Engine controls demand one of the highest real-time deadlines, as the engine itself is a very fast and complex part of the automobile. Of all the electronics in any car, the computing power of the engine control unit is the highest, typically a 32-bit processor. [citation needed] A modern car may have up to 100 ECU's and a commercial vehicle up ...
The ELM327 is a programmed microcontroller produced for translating the on-board diagnostics (OBD) interface found in most modern cars. The ELM327 command protocol is one of the most popular PC-to-OBD interface standards and is also implemented by other vendors.
PC: passenger car; RPM: Revolutions Per Minute; PS: Power steering; R-134a: Refrigerant 134a, tetrafluoroethane (C 2 H 2 F 4) R-152a: Refrigerant 152a, difluoroethane (C 2 H 4 F 2) RCTA: Rear Cross Traffic Alert; RPE: Retail price equivalent; RWD: Rear Wheel Drive; SULEV: Super ultra low emission vehicle; SUV: Sport utility vehicle; TBI ...