New-Tech Europe Magazine | February 2018

Radar Sensing

Vince Zsolt Szabó, Arrow

Abstract The Industry 4.0 revolution and the spreading of “Smart Technology” applications require more and more data about our environment and outside world. The sensors has got an outstanding role while the sensors transform the measurements of the analog world into digital signals which can be processed in digital systems. The RF based sensing becomes increasingly important among the traditional sensing technology because its benefits and versatile usage convinced the developers to use it in wide range of applications. 24GHz radar sensors (K band) The ‘K’ band radars are getting more commonly used sensor types in the commercial and industrial applications as well. The 24GHz radar sensors - like all of the radars - use the electromagnetic waves

Independently from the radar working method and radar sensor complexity: “non-contact” sensing method highly independent from weather / environmental conditions the electromagnetic waves penetrate the insulators different solution level Dependent on the radar working method and complexity: measurement of multiple physical quantities distinguish the stationary and moving objects Application areas The radar sensors – due to its benefits and capabilities – can be used several type of application e.g. from the simplest movement detection to themore complex state and position detection. Since radar sensors have highly insensitivity to the environment they are popular sensor types in outdoor applications.

to gather information about the environment. Briefly the working theory is the radar emits a signal on transmitter side the electromagnetic waves reflect from the objects in its coverage area the reflected waves get back on the receiver side the data will appear on the output after the mixing and signal processing 24GHz radar sensor benefits The radar sensors have several benefits over the traditional sensing methods. The most significant are the ability to detect multiple type of physical quantities like movement, speed, distance, angle etc. - but it depends on the working method (e.g. CW, FMCW) and the complexity of the radar sensor, on the other hand the high independence from the environmental conditions.

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