Title :
Development of multi-functional grounding resistance meter based on DSP
Author :
Guo, Xiucai ; Zhang, Xiutong
Author_Institution :
Coll. of Electr. & Control Eng., Xi´´an Univ. of Sci. & Technol., Xi´´an, China
Abstract :
According to the present development of the grounding resistance testing system, the paper designs a new multi-functional inverter grounding resistance meter based on BF504 chip. It´s forward channel acquisition circuit to get information of the grounding resistance by testing terminals and clamp mouth, using AD7942 chips to get real-time data of voltage and current; after data processing by DSP to get related parameters of grounding resistance, finally realizes the docking ground resistance measurements. Using direct digital frequency synthesis (DDFS) technology to automatic frequency selection, avoid interference frequency. After testing, the results show that the instrument is reliable, high accuracy, low cost, compact and lightweight.
Keywords :
digital signal processing chips; direct digital synthesis; earthing; electric resistance measurement; interference suppression; invertors; AD7942 chips; BF504 chip; DSP; automatic frequency selection; clamp mouth; direct digital frequency synthesis technology; docking ground resistance measurement; forward channel acquisition circuit; grounding resistance testing system; interference frequency; multifunctional inverter grounding resistance meter; real-time data processing; testing terminals; Current measurement; Digital signal processing; Electrical resistance measurement; Frequency measurement; Grounding; Resistance; Voltage measurement; DDFS; DSP; grounding resistance;
Conference_Titel :
Artificial Intelligence, Management Science and Electronic Commerce (AIMSEC), 2011 2nd International Conference on
Conference_Location :
Deng Leng
Print_ISBN :
978-1-4577-0535-9
DOI :
10.1109/AIMSEC.2011.6010769
