An accurate measurement of high resistance
Shicheng Wang · Applied science and technology · 2010
To measure the value of high resistance accurately,the hardware modules were designed and the calculation algorithm of the circuit was introduced.The ordinary Wheatstone bridge was improved,thus the bridge arm became an equivalent electric circuit with high accuracy and could be matched with the resistance;a single-chip microcomputer was applied to make the measurement intelligent.The confirmation test and analysis of the improved measuring circuit for high resistance were carried out,the voltage error and resistance error were given at last.The results show that the circuits designed for high resistance has the advantages of small measurement error and simple operation,and it can be easily applied to the engineering practice.