Design And Realization Of The Aerial Survey CCD Digital Camera's Circuit System

Aerial photogrammetry is the frontier of mapping, and the bottleneck of the observation to ground in China. Currently, the entire nearly one hundred film aerial photographic instruments of major surveying and mapping units are all imported, which undertake the most aerial photography work in China. However, the price of the high performance aerial photographic instruments imported is higher, and the replace the older generations is more and more fast. Therefore, in addition to making full use of the current film aerial photographic instruments, how to self develop digital aerial photographic instruments has become a critical mission for China's development in observation to ground. Against the above background, this object uses the massive system structure of the film aerial photographic instrument, integrates with the digital imaging module, and realizes the digital aerial photographic ratio of baseline to height, which is first rate all over the world.By introducing the testing and evaluating board of aerial survey instrument from the DALSA Company in Canada. After researching, testing and making use of the advanced designed circuit, combing with the actual demand, the digital aerial survey camera is developed, which not only satisfies the aerial photographic demand, but also is integrated applied with the current film aerial photographic instrument.The details of the dissertation are as follows:1. Designed the CCD core imaging system circuit, including the front collecting circuit, the CCD driving circuit, the controlling system circuit and the storage system circuit. Installed and adjusted the entire circuit together with each parts, build the whole circuit system frame of aerial survey camera.2. Completed the software design of the circuit, based on the completion of the hardware design. The programs of CCD driving circuit and controlling system were designed to make sure the entire hardware system could run normally.3. Based on the research of aerial survey instrument's board from the DALSA Company in Canada, according to the driving request of the CCD chip, designed the digital imaging unit, which works with the SCM combined with CCD special digital integrated chip, is one of the innovative pointes of the dissertation.4. Designed a controlling system which takes the CMU as core, replaced the common airborne flying controller widely used by the former aerial photographic system, not only realized the man machine interactive function reasonably, but also reduced the power consumption, simplified the operation method, which is another innovative pointes of the dissertation.5. Based on the completion of the design and adjusting of both the software and hardware platform, experimented both indoor and outdoor, and verified the aerial photographic experiment results, which achieves the expected results. Completed the object perfectly.