A method of realizing data acquisition in accelerometer system based on voltage-frequency conversion principle is introduced. With TI\'s digital signal processor TMS320F240 as the core, the programmable timer/counter 8253 is used to count the output pulses of the high-performance synchronous voltage-frequency converter AD652 to realize data acquisition. The system hardware circuit design and software flow are analyzed. The results show that the high-performance synchronous voltage-frequency converter has high resolution and strong anti-interference ability, which can meet the requirements of accelerometer data acquisition in inertial navigation system.
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