应用于超声操纵技术的虚拟信号发生器的研制

Development of a Virtual Signal Generator Used for the Ultrasonic Manipulation

为满足对微构件进行操纵的需求,在分析现有各种操纵方法的基础上,利用超声波良好的特性和具有的力学特点,采用DSP为中心测控单元,FPGA为接口控制电路,将虚拟仪器的体系结构融入到设计当中,开发了一套高频虚拟信号发生器。该信号发生器在一定的硬件配置条件下,可通过更改软件达到对所产生高频超声波信号的频率、幅值和相位进行柔性可调,从而实现对微构件俘获、搬运和释放等各种非接触遥操纵的目的。试验表明上述信号发生器是可行和有效的。

On the basis of analyzing current manipulating technologies and according to the perfect characters & force effect of the ultrasonic wave, a virtual high-frequency signal generator was developed in order to meet the needs of manipulating the micro-components, using a DSP (digital signal processor) as the central measuring & controlling unit, a FPGA (field programmable gate array) as the interface unit and adopting the virtual instrument framework for this development. The frequency, amplitude and phase of the ultrasonic wave generated by this generator can be adjusted flexibly by means of changing software based on the given hardware, and the aim of non-contact & remote manipulating the micro-components, including capturing, moving and releasing, was realized. The experimental results indicate that the signal generator is feasible and effective.