Intelligent Infrared Comfort Sensors for the Automotive Environment

We will discuss the advantages of contact-less infrared thermometers as main sensor in automotive climate control systems and address the practical considerations one should take into account when developing such a system. In order to offer a price competitive solution with the more commonly known aspirated thermistor sensor, Melexis developed an integrated infrared thermometer targeted at size reduction, improved ease of installation, multi zone temperature control and cost improvement. The features of this new product are highlighted. Furthermore we discuss the functional and reliability requirements that have to be met by automotive infrared sensors and how these requirements are met in a modern sensor design. Finally, we show the results of the development of low cost infrared array sensors for next generation air-conditioning systems in combination with safety applications.