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《Ordnance Industry Automation》 2006-01
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Design of Virtual Multimeter Based on ISA Bus

YAO Zhi-gang1, TAN Xiao-chen2, WU Bo-mao3 (1. Dept. of Optic & Electron Engineering, Ordnance Engineering College, Shijiazhuang 050003, China; 2. 4th Department, 63961 Army of PLA, Beijing 100012, China; 3. 76321 Army of PLA, Guangzhou 510500, China)  
The virtual multimeter based on ISA bus is divided into computer and ISA bus board. It is composed of A/D conversion, alternating voltage measurement, resistance measurement and interface circuit. After the initialization, according to the corresponding modes and position, the main progress sent data signals to address latch and simulate switch through ISA bus. The A/D decoding circuit received simulation signal form measurement port and converted the signals into data signals which displayed by 7-segment, then signals were sent to data latch. ISA bus read the corresponding data space. After processed by software, the data was stored as decimal measurement value to draw image and calculate average value and so on.
【Fund】: 军械工程学院科研资助基金
【CateGory Index】: TM938.12
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