Temperature measurements of the vehicle cabin using ultrasonic transducers

• Main Authors: Hong, Cheng-Han, 洪丞漢
• Other Authors: Tseng, Wen-Kung
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/pyq83m

碩士 === 國立彰化師範大學 === 車輛科技研究所 === 105 === The optimum temperature control of the Automatic Climate Control(ACC)in vehicle cabin is dependent on whether or not the thermometer can measure temperatures around occupants. Most in-car temperature sensors are difficult to achieve that. In order to measure the temperature around occupants, this thesis presents a technique based on ultrasonic temperature sensors using sampling of the ultrasonic time of flight (TOF). Two modes of measurements were used for investigation, including a changed temperature environment, and a disturbance environment. The data were processed by Kalman filter and humidity compensated for lowering noises and increasing accuracy. The experimental results showed that the ultrasonic temperature sensors are able to provide accurate temperature measurements, fast response to temperature changes, non-contact and anti-interference.