| 摘要 |
A portable device permits testing of an EOT unit of a two-way end-of-train (EOT) radio telemetry system. During the test, the EOT unit may be mounted to and fully installed on the railcar on which it is to be used. The portable device includes a microprocessor unit, a display, and a transceiver that enables the invention to communicate with the EOT unit. The portable device also includes a mechanism for authorizing the portable device to communicate with the EOT unit. Used to control the overall operation of the portable device, the microprocessor unit operates the transceiver in cooperation with the aforementioned mechanism so as to authorize the portable device to communicate with the EOT unit according to an arming procedure. The microprocessor unit also operates the display on which the progress and completion of the arming procedure is indicated. When the portable device is authorized to operate with the EOT unit, the display is directed to indicate operational data that it receives from the EOT unit pertaining to the railcar to which the EOT unit is connected. The portable device further includes a mechanism for initiating an emergency reduction in pressure within the brake pipe of the railcar. When the emergency initiating mechanism is activated, the microprocessor unit commands the transceiver to transmit an emergency brake signal. It is by this emergency brake signal that the EOT unit is ordered to reduce the pressure within the brake pipe of the railcar at an emergency rate. |
