Data Acquisition Circuit Design And Implementation Of Wave Refraction Correction Instrument

With the progress of modern science and technology and meet the demands of modern warfare, accurate positioning of air targets and accurate velocity measurements have become the main function of high-precision radar systems. It is generally known that the radar utilize the reflection of electromagnetic waves to detect the position of the target, and when the radio waves propagation in the atmosphere, they can be affected by the in-homogeneous medium, thereby affecting the positioning and speed measuring precision of the radar,and therefore, in order to improve the measurement precision of the radar, we must to correct and revise radar measurement error caused by atmospheric environment, wave refraction correction instrument in such a situation arises at the historic moment. In the wave refraction error correction, in order to satisfy the high-precision and real-time requirements, the use of radio wave refraction correction instrument to correct refractive error is the best method at present.In the wave refraction correction instrument, atmospheric parameters acquisition and radar measurement parameters input are the key technology, which determines the precision and speed of the refraction error correction, we need to optimize and design for the acquisition circuit of atmospheric parameters and radar measurements parameters, and design to meet the requirements of the data acquisition circuit.In order to implement high speed, real-time data acquisition and processing, according to the characteristics of the ground atmospheric parameters measurement equipment Lufft WS300-USB output data, in the atmospheric parameters acquisition circuit design, first of all, we chose the embedded microcontroller processor MCU as the master control chip, has peripheral circuit configuration is simple, small volume, low cost, stable performance, high reliability and rich peripheral hardware resources advantages. Then according to the requirements of high speed and high precision, this paper has carried on the overall design on the atmospheric parameter acquisition circuit, and detailed respectively each module circuit design to the acquisition of the atmospheric parameters such as temperature, pressure and humidity, final completion of the data acquisition and processing system has easy-to-operate, low cost, and strong anti-interference features.In order to debug of wave refraction correction instrument, on the basis of no radar and real-time measurement data, we should also be develop the radar measurement parameters simulator and radar parameters acquisition circuit. The radar simulator can output the simulation of radar measurement parameters for debugging wave refraction correction instrument, radar data acquisition circuit is similar to the atmospheric parameter acquisition circuit.Finally, through the development, implementation and optimization of two acquisition circuits, It has proved that the developed data acquisition processing system can ensure real-time and high precision, high speed of data acquisition, and satisfies the radio wave refraction correction instrument for high speed and high precision requirements. The acquisition circuit can also be applied to other areas of data collection.