This is put forward based on the triaxial acceleration sensor in the intelligent vehicle control and design of path identification. The design adopts the three-axis accelerometer measurement acceleration signal of the smart car in motion, embedded single chip as the core controller, the acceleration signal sampling, A/D conversion, will feature data is stored in the Ehardstrugglee again. Well solved the problem of the intelligent vehicle motion path analysis as well as on. Real-time access to the car acceleration, thus a more comprehensive to get the car running state, for the control of fluency and better road recognition.
three axis acceleration sensor can measure the smart car inertia size, select the best focus position, and can accurately locate the smart car in a straight line, curve, ramp, drift, running state; Using acceleration sensor to predict path ahead of time, and decide when the brake Watson instrument best effect. And good to walk upright is solved by using the models of equilibrium and direction recognition.
In the models of walking upright, apply the same principle, choose the best center of gravity, is a good way to solve the balance of the upright models and direction recognition, thus accelerate the speed of car model.
Experimental results show: the combination of acceleration sensor has a strong anti-interference, extract the Angle information more accurate, to ensure that the smart car was able to high speed on the straight and in corners are basic don't stall smoothly cornering.
Acceleration sensor is the core part of the micro mechanical symmetry capacitor, it consists of three pieces of each other is the thin glass membrane separation of single crystal silicon wafers, monocrystalline silicon surface coated metal film. Middle of silicon is the cantilever beam structure, is the quality of the big block on it, the quality of block up and down surface coated metal film, it and the lower level of silicon metal film two capacitance, capacitance value and single crystal silicon good elasticity coefficient can get the best measurement results, it is in low g value within the range of measurement results is very good.
Effect on the silicon wafer or acceleration of gravity force makes the monocrystalline silicon electric bending beam oscillation, this deviation can be two metal film for the distance between the electrode of the capacitance change and measured. Micro mechanical piece can make relatively large capacitance and the capacitance change easily be detected.
Double capacitor structure and its symmetry improved the stability of the accelerometer zero at the same time, among them a capacitance of any changes will cause the similar change and on the other side of the capacitance compensation. Another symmetry error performance lead to cross shaft. In VTI acceleration sensor assembly is determined by the accuracy of Angle and symmetry. Different range by adjusting the thickness of the string piece. Humidity sensor components determined by the pressure of the sealed cave, silicon wafers, the sealed cave is the middle string piece and the outer layer of silicon wafers. Can by adjusting the sensor components to meet the needs of different USES, is achieved through anode and silicon solid bonding and sealing. It also saves the need of additional packaging, improve the reliability of the quality of the accelerometer.
