A low-cost high-precision embedded signal acquisition and analysis system and method

Abstract

A signal collection and analysis system and method are disclosed. The signal collection and analysis system comprises a main controller, a data converter ADC, a frequency measurement unit and the like. The main controller comprises a main control unit, an auxiliary control unit and a logic gate array, wherein the logic gate array is used for driving an ADC and measuring and calculating frequency of tested signals, and the main control unit is used for realizing man-machine interaction and communication with the auxiliary control unit and a host computer. The low cost and high precision embedded type signal collection and analysis system is characterized in that the logic gate array and a front end circuit can be used for accurately measuring signal frequency, a signal amplitude can be accurately calculated by the main control unit when the signal frequency is known, and the auxiliary control unit is capable of expanding other low speed demands of the main control unit.

Description

technical field [0001] The invention relates to a signal acquisition method and system, in particular to a high-precision acquisition method and acquisition system for alternating current signals. Background technique [0002] In the design of various general instruments, especially in the design process of high-precision electrical instruments and equipment, data acquisition has always been an indispensable part. The indicators of the data acquisition system directly affect the technical indicators of the designed instruments and sensors. At present, in the design of the instrument and the amplitude-frequency characteristic test of the general signal, the signal acquisition and display generally use an oscilloscope, and the vertical resolution of the general oscilloscope is 8 bits, and the resolution of the built-in counter is 6 bits, which makes it difficult to meet the high precision requirements. The design requirements of the instrument, and the price of a special oscil...

AI Technical Summary

Problems solved by technology

At present, in the design of the instrument and the amplitude-frequency characteristic test of the general signal, the signal acquisition and display generally use an oscilloscope, and the vertical resolution of the general oscilloscope is 8 bits, and the resolution of the built-in counter is 6 bits, which makes it difficult to meet the high precision requirements. The design requirements of the instrument, and the price of a special oscilloscope with a high vertical resolution or high frequency index will increase geometrically on the basis of an ordinary oscilloscope, which puts forward an urgent demand for a low-cost, high-precision signal acquisition method

[0003] Usually in order to meet the high-precision requirements, more advanced chips and processing circuits need to be used, which will make the cost very high

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