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Active Night Vision Device for Car

Author: ChenDaYong
Tutor: YangKeCheng
School: Huazhong University of Science and Technology
Course: Physical Electronics
Keywords: LD beam collimation Temperature Night vision devices
CLC: TN22
Type: Master's thesis
Year: 2011
Downloads: 50
Quote: 0
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Abstract


With the development of optical detection systems , night vision systems are widely applied to various industries . As we all know , driving at night because poor lighting , the driver can not be timely grasp of road conditions , prone to accidents , for which it is necessary to develop a suitable vehicle night vision system . The research and design of a suitable vehicle for active imaging device . To enable this paragraph active vehicle night vision devices meet the design requirements , the first of photoelectric detection system works analysis and research , and then combined with the subject of the system design requirements of the technical specifications of each module to give the theoretical analysis and calculations. The system hardware design includes the design of the receiving apparatus , the laser emitting device design and the temperature display module design . Receiving device design is divided into theoretical calculations and hardware assembly, theoretical calculations for photographic lenses provide the basis for the selection of the hardware assembly is to monitor , CCD, and photographic lens assembly and commissioning . The design of the laser emitting apparatus includes a laser emitting device to determine the optical power , mechanical structure of the semiconductor laser and a semiconductor laser drive circuit. Semiconductor laser driving circuit design includes switching regulator type , constant current source type , impulsive , and three forms of circuit analysis . Temperature display module for the observation of the operating temperature of the system , by the operating characteristics of the temperature sensor DS18B20 and transport protocols , in combination with the MCU to complete the temperature display module hardware design and circuit board production, Keil uVision2 use software for programming the temperature display module and debugging. To verify this subsection active vehicle night vision devices to meet the design requirements, the system carried out field experiments at night . Experimental data show that the system can clear imaging targets at night to meet system design. In addition, the paper also faced this system gives some technical problems are analyzed and resolved.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Night vision technology,night vision
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