 หัวเรื่อง:การประยุกต์ใช้เลเซอร์ไดโอดในการวัดระยะทาง ผู้เขียน: นางกรกฏ วัฒนวิเชียร, รองศาสตราจารย์ ,  Chana Lohasaptawee สื่อสิ่งพิมพ์:pdf AbstractA design and construction of electronic distance measurement using laser diode is reported. The instrument is consisted of transmitter and receiver. Transmitted signal which comes from laser diode modulated with electrical signal by amplitude modulation is objected to the reflector. The reflected light is detected by photodetector and converted to electrical signal. Distance measurement is calculated by using phase comparison between electrically transmitted and received signals. The constructed instrument can measure a distance in the range of 40 m with errors of 1 - 4 %. |