| Summary: | 碩士 === 國立臺北科技大學 === 機電整合研究所 === 105 === The current outdoor parking system management requires a lot of manpower to run it. The most efficient way to use manpower wisely is to adopt the sensor devices with parking control. The sensor device technology not only reduces the manpower, but also improves outdoor parking management in timely manner, and by reducing the time spectrum finding a parking spot.
This thesis is about research and development of a new sensor device for outdoor parking system control. This research mainly focuses on unique identification of an automobile based on its electrical interference characteristics that generated from both electronic control system and high-voltage coil of the engine. Since the electronic system and radio channels will interference each other, modulation is used to shift this band, in order to avoid the antenna frequently Interference with the system (at frequency 250KHz).
So use of an automobile electronic control system amplifies interference and high-voltage coil coupling part for identify detection purpose, also Phase lock loop technology is used for locking frequencies bands. EMI has characteristics of short time and distance, high energy characteristics, all the above meets near-field sensing trigger conditions, so this research topic is to focus on Digital FM demodulator & ADC function.
Outdoor system device still has many challenges to overcome, such as construction, maintenance, environmental, power systems, physics issue and electromagnetic interference. So that, digital FM demodulator is suitable for outdoor automobile detection devices on account of adjustable detection bands, environmental adaptability, minimum power consumption and other benefits.
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