Study On Frequency And Apparatus Design About The Real And Induce Components Of Grounding Electrode Impedance

Measuring technology on frequency is one of important contents of the modern disposal technologies, developing from optics , acoustics and wireless techniques. Analyzing noise frequency character and useful signal physical or dynamical characters, interrelated function and frequency chart connection, it can get signal amplitude, phase and interknit in the frequency, and it can restrain, get rid of noise and correct signal shapes or datum .The method has great capabilities in anti-jamming and increasing the testing precision. It has broad applied worth and foreground to some experiments and instrument design about testing in the frequency。Impedance testing of grounding electrode is an intelligentized testing system, based on measurement of frequency chart, including signal transmitting,data acquisition and processing and displaying etc. The works of design are great, and scope of the knowledge is wide, mainly referring to engineering testing methods, weak signal detection, frequency chart techniques, electronics techniques and standards, active filter techniques, A/D conversion techniques, microprocessor, Liquid Crystal Display (LCD ) and a series of software related to the hardware designing, such as keil uvision2, MC-51emluator, Prote199se , C language etc. But on the limitation of time and condition, the paper only completes the primary designing and debugging of the system。Referring many domestic and overseas references ,author simply analysis the development , principle of grounding electrode impedance testing and many interferential factors during testing., and thinks the measurement of induction and real about grounding electrode impedance in frequency chart is comprehensive and exact testing method, so puts forward to design the instrument using it. And then presents the whole ideas of the system design, and decides the scheme, based on the comparison of all kinds of the designing schemes. The paper induces detailedly each module function and design from the two relatively independent modules (transmitter and receiver).Transmitter is a key part of the whole system, which supplies a sine wave with a certain...