Patterson P E
Iowa State University, Ames 50011, USA.
Biomed Sci Instrum. 1995;31:275-80.
The purpose of this project was to adapt a Morse code system for use with a personal computer by a high level quadriplegic individual to achieve greater independence around the home. This was done by eliminating the hardwire connection between the wheelchair computer and the personal computer, replacing it with a Morse Code Transmitter (MCT). The MCT performed the same function as the hardwire connection, but served as a remote controlled device. Each device function is controlled by a sip-and-puff switch. When the Morse code function is active (i.e. transmitting the Morse code from the sip-and-puff device to the computer), the wheelchair computer directs its activity to a specific output port within the wheelchair. The computer detects the position of the sip-and-puff switch, activating the desired function. The system has been pilot tested by the subject for a year with a number of advantages and disadvantages found. The subject has been satisfied with the system's reliability, ease of use, and its response time. Increased transmission range was requested, as well as a desire to control more aspects of the environment. Further evaluation and modification of the system is underway; miniaturization and improving the transmission characteristics are priorities.
该项目的目的是让高位截瘫患者将莫尔斯电码系统应用于个人电脑，以在家庭环境中实现更大程度的自理。具体做法是消除轮椅电脑与个人电脑之间的硬线连接，代之以莫尔斯电码发射器（MCT）。MCT执行与硬线连接相同的功能，但作为一个遥控设备。每个设备功能由一个吸-吹开关控制。当莫尔斯电码功能激活时（即从吸-吹设备向电脑传输莫尔斯电码），轮椅电脑将其活动导向轮椅内的一个特定输出端口。电脑检测吸-吹开关的位置，激活所需功能。该系统已由受试者进行了一年的试点测试，发现了一些优点和缺点。受试者对系统的可靠性、易用性及其响应时间感到满意。受试者要求增加传输范围，并希望能控制更多的环境方面。该系统正在进行进一步评估和改进；小型化以及改善传输特性是优先事项。
