"基于LabVIEW的虚拟仪器信号发生器设计及应用分析"

Virtual instruments integrate instrument technology, computer technology, bus technology, and software technology to harness the powerful digital processing capabilities of computers to achieve the functions of instruments, breaking the traditional framework of instruments and creating a new instrument model. This design utilizes the USB6211 data acquisition card to implement virtual instrument technology in the design of a signal generator. The system is capable of generating sine waves, square waves, triangular waves, sawtooth waves, and PWM waves. This paper first provides an overview of the development and trends of signal generators and virtual instrument technology both domestically and internationally. It then introduces the relevant theory of signal generators, presents the basic principle block diagram of a signal generator, and discusses the bus and standards of virtual instruments, as well as the framework structure and LABVIEW development platform. Based on the analysis of the functional requirements of the system, the design involves hardware and technologies such as the data acquisition card and LABVIEW programming mode. This design is an attempt to simulate real instruments with virtual instruments. Practice has proven that virtual instruments are an excellent solution that can accomplish various tasks that hardware can complete. Keywords: virtual instrument, data acquisition card, signal generator, LABVIEW.