Abstract
This paper reports a development of radio trip-sensor for labor safety. Radio trip-sensors are expected to prevent labor accidents such as collisions due to blind corner. Such devices are not in widespread use because they are not categorized clearly as safeguards yet. A pilot unit toward the practical use of the sensor introduces the notion of the trip-sensor. The unit can caution about hazardous trip with high repeatability. Specifications and performances of developed devices are described.
