Research And Design Of Hardware Technique For Highly-precise Signal Generator

Signal Generator is an important part of the control system which is also an imdispensable basic technology of the Industrial Automation.The signal generator obtained the extremely widespread application in many high tech domains.such as electronic measurement,bio-medicine,aviation manufacture,etc.Therefore through profits the advanced experience from the domestic and foreign research work,embarks from the high beginning,develops the digital singal generator with the high-accuracy,reliable and the parameter can be adjusted. For the promotion of our country's instrumentation,electronic measurement,aviation,national defense and automation development has the vital significance.This topic belongs to the Nanchang aviation university Computer College undertaking the project"the image of non-contact automatic detection table system"in the standard dynamic high-precision signal generator of study.The topic request the signal generating device as a source of measuring a variety of electronic components and electronic equipment of the standard signal source,so its stability,accuracy,and the output signal trimming resolution put forward a very high request.This artice finally selects the signal synthesis method with the DSP technology,the DDS technology,and the PLL technology through analysising, comparing,unifing each kind of signal sythesis technology which widely used at present..its realizes the high accuracy digital signal which the topic requests through feedbacking and the auto-adapted adjusting.In the paper the hardware and software system design will be introduced.,the hardware design includes: DSP and DDS interface design,DSP and the external data storage interface design,D/A module design,frequency multiplication module design and so on.the software process design includes: DDS control procedure,D/A control procedure etc.After the laboratory test and system joint testing,the signal generator can satisfy the requirements of the project,and the structure is simple,reliable,light weight and small size,its has a good prospect of application.