Measurement Instrument Based On The Pci Bus Virtual Rlc

With the developing of instrument science, instruments are getting more intelligent. Virtual instrument is an important branch of instrument science and a keen edge of researching. RLC elemental meter is a kind of intelligent instrument used to measure elemental parameter such as resistance, inductance, capacity, quality and so on. In this paper, we made a virtual RLC elemental meter based on PCI bus.The paper includes two parts, one is the designing of hardware circuit the other is the programming of application software. At the first part, we described using a piece of PCI 9054 1/0 Accelerator chip to make the interface between computer and the measurement circuit. Further more a piece of complex programmable logic device isp2 128 was used to simplify the digital circuit and save boardroom. It provided not only some control signals that measure circuit need but also counters used for analog digital conversion. The calculation of data is accomplished by means of the application software. At the second part, Lab Windows/C VI was used to develop the application software and the device driver developed with Driver studio. We described how to use software followed with the development of application software and the driver program.