McAlwee J S, Bass E A, McBroom S T
Southwest Research Institute, San Antonio, TX 78228-0510.
Biomed Sci Instrum. 1993;29:485-97.
This paper will review the applicability of VXIbus based instruments to the needs of the bioengineering and biomedical measurement communities. Peak signal bandwidths supported by VXIbus extend to the GHz range which is well above most biological signal requirements. Similarly, environmental compatibility specifications including electromagnetic compatibility, cooling, shock, and vibration may exceed most needs and add to unnecessary cost. Despite these potential mismatches, the instrument-on-a-card and the virtual instrument capabilities of VXIbus offer advantages over existing RS-232, IEEE488.1/.2, plug-in cards, and other "rack-and-stack" systems. Expansion and flexibility inherent in VXIbus devices make them resistant to obsolescence and easy to upgrade. Users are faced with a number of selection criteria when making instrumentation decisions. Bandwidth, power, isolation, cost, performance, software for control, and future development needs are among the issues that must be evaluated. A list of systems, devices, and suppliers is provided as part of this paper.
本文将探讨基于VXI总线的仪器对于生物工程和生物医学测量领域需求的适用性。VXI总线支持的峰值信号带宽延伸至GHz范围,这远高于大多数生物信号的要求。同样,包括电磁兼容性、冷却、冲击和振动在内的环境兼容性规格可能超出大多数需求,并增加不必要的成本。尽管存在这些潜在的不匹配情况,但VXI总线的板载仪器和虚拟仪器功能相对于现有的RS - 232、IEEE488.1/.2、插件卡及其他“堆叠式”系统仍具有优势。VXI总线设备固有的扩展性和灵活性使其不易过时且易于升级。用户在做出仪器选择决策时会面临诸多选择标准。带宽、功率、隔离度、成本、性能、控制软件以及未来发展需求等都是必须评估的问题。本文还提供了一份系统、设备和供应商的清单。