Design Of High Frequency Power Supply Acquisition System For Electrostatic Precipitator

With the increasingly updated technology, the requirements for products on real-time of information, extendibility of system and the integration of the circuit are higher and higher. In the aspect of data acquisition, as the implementation of port resources are limited and its sequence of work mode,the traditional AD sampling method--SCM, DSP have could not met people’s requirements. While FPGA has fast speed, good compatibility and strong real-time, it is increasingly used for data collection and simple calculation.The overall structure of the design is based on the control platform of DSP and FPGA. This design makes full use of the flexibility of FPGA and parallel characteristic, matchs with specific ADs and serial memory chips, multi-channel acquisition analog、 digital signals, and the performance of the system is also improved.First, this paper makes a detailed introduction to the high frequency power supply for ESP and the principle of work, and datas collected in the high frequency power supply are analyzed and studied in details, including the requirements of acquisition and characteristics of the signal.Second, according to the design object, conditioning circuits of each path of signals is designed, and the circuit design principle and function are also analyzed in details, and the experimental waveform simulation waveform and the final physical design are presented at last After the design of hardware is finished, this paper makes a detailed analysis of the timing of data acquisition chip used in hardware circuit, implemented in FPGA software acquisition program and timing simulation, especially the data cache and data transmission are analyzed and discussed.Third, to enhance the efficiency of DSP and the system, after analog signals chanage to digital signals, a research of an implementation of FIR filter based on DA algorithm in FPGA is presented, and the implementation steps and detailed results is given.With the development of network and information technology, since its irreplaceable advantages, FPGA is more and more widely applied to various fields. The acquisition system based on FPGA designed in this paper, not only has the further promotion in real-time, and the system scalability is very strong; It is conducive to upgrade equipment.