Design of Self-adaption High-precision Bridge Wire Resistance Tester
In order to realize the high-precision measurement,adaptive range and automatic testing of explosive bridge wire resist-ance measurement and insulation inspection during the comprehensive testing of weapon systems,this paper studies the application scenario,overall architecture,hardware design and software design in explosive bridge wire resistance measurement.By adopting the technology of switching different measurement channels with multiple-choice switch matrix and the automatic detection and safety guarantee technology before connecting the constant voltage source and constant current source to the measurement circuit,the range adaptive high precision bridge resistance tester can realize the measurement innovation of adaptive range with 2-wire and 4-wire resist-ances.Experimental results show the absolute value of measurement error for small resistances is less than 0.5％,with an absolute value of less than 1％for large resistances.At the same time,it can realize the adaptive range and automatic testing of the explosive bridge wire resistance measurement.By practical application,it can meet the requirements of bridge wire resistance measurement and insulation inspection.
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