| 摘要 |
<p>An electric carrier 20 with a motor controlled by a relative positional mechanism includes an operator, such as a vehicle 10 or a person, a sensor 41 controlled by the operator and having a position reference member 40 driven by and moving together with the operator and a sensing body 41 producing a signal at any movement of the position reference member, a spring connected to the position reference member and distorted by the operator's driving so that the position reference member may return to its position and transmit force to an electric carrier to be mentioned below, a controller operated by a signal coming from the sensing body, a motor driven by the controller and accordingly having the functions of increasing and decreasing speed and clockwise and counter-clockwise rotation, and the electric carrier moved by the motor and with the operator synchronously. When the operator changes its position relative to the electric carrier, the sensor sends a signal to the controller, which then controls the electric carrier to change its speed to the same speed as that of the operator. The sensor may be a carbon brush (Figs 7-16), a magnetic sensor or a light or photo sensor providing an A to D converter output. Uses include an electric golf cart (Figs 5 and 6), wheelchair (Figs 23-25) and bicycle (Figs 21 and 22).</p> |
