Portable distance measuring device, train operation system, control circuit, storage medium, and method for determining whether a train driver is inside or outside a train

Abstract

To provide a portable distance measuring device (20) capable of improving the accuracy of a train crew's inside / outside determination by wireless communication with an in-car distance measuring device installed inside a train that does not require a complicated antenna design. The portable distance measuring device (20) includes an in-car distance measuring device relative distance calculation unit (25) that calculates the relative distance between the portable distance measuring device (20) and multiple in-car distance measuring devices installed inside the train based on a propagation delay time of wireless communication between the portable distance measuring device (20) and multiple in-car distance measuring devices installed inside the train, a report information analysis unit (27) that analyzes report information transmitted from the multiple in-car distance measuring devices and acquires installation area information indicating the installation area of ​​the in-car distance measuring device that is the sender of the report information, an in-car / outside determination unit (26) that determines whether the portable distance measuring device (20) is inside or outside the train based on the relative distance and the installation area information and outputs the in-car / outside determination result, and a portable distance measuring device transmission unit (23) that wirelessly transmits the in-car / outside determination result to the in-car distance measuring device.