In the System of Target Tracking Recognition, infrared sensors and visible light sensors are two kinds of the most commonly used sensors; fusion effectively for these two images can greatly enhance the accuracy and reliability of identification. Improving the accuracy of registration in infrared light and visible light images by modifying the SIFT algorithm, allowing infrared images and visible images more quickly and accurately register. The method can produce good results for registration by infrared image histogram equa-lization, reasonable to reduce the level of Gaussian blur in the pyramid establishment process of sift algorithm, appropriate adjustments to thresholds and limits the scope of direction of sub-gradient descriptor. The features are invariant to rotation, image scale and change in illumination.

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Automotive industry is being one of the major supporting forces for the economy of many countries. The requirement of higher standard on safety figure for cars has demanded engineers to design automobile airbag systems with high performance. Since the ignition system is one of the major units in an airbag system, a design of a high-voltage piezoelectric converter which can be implemented in airbag ignition systems is studied in this paper. The selection of the piezoelectric transformer can improve the reliability by increasing the ignition energy. Using the multi-point ignition scheme to measure the orientation of the airbag detonation, the accuracy of the airbag ignition can be improved and the accidental injury caused by collisions can be further reduced. Besides, a good solution to synchronization problems is provided by using multi-point synchronization control and multiple air bags.

Safety, environmental protection and energy saving are three main measures of development level of modern automotive technology, where safety is in the first place. With people's living standards improvement, more and more users will choose the higher configuration, safer cars. These promote a high-performance automobile airbag system development. Ignition system is a key component of the airbag. Because of reliability, accuracy and other limitations, the existing airbag ignition system doesn’t work well. In this paper, a high-voltage piezoelectric converter used in car airbag ignition systems is discussed. It is the combination of safety and environmental protection, and improves the reliability and accuracy. The solution includes conversion circuit model of piezoelectric ignition system, frequency characteristics of piezoelectric transducer, quantum-based control technology for optimal efficiency of transformation and a starting control design of automobile airbag ignition system on piezoelectric transformer. The experiment results verify the correctness of design.