
Information and Communications Technologies
Personnel Vicinity Detection System「W Alert」

This system helps reduce the risk of accidental contact between a person carrying a tag and a vehicle with a mounted detector. It sounds an alarm when a potential danger is electromagnetically detected.
Key features
- Detection in all directions with magnetic sensors
- Dial adjustment of detection distance
- Two-stage alarm feature comes standard
- Steady detection distance achieved by a specific low power radio station
- Popular deployment in the construction industry (including some systems registered in the New Technology Information System of the Japanese government)
Features
Detection in all directions
Omnidirectional detection leaves no blind spots. Six different detection distances can be selected with the adjustment dial.
- 8-m model: 3, 4, 5, 6, 7, or 8 m
- 12-m model: 3, 4, 6, 8, 10, or 12 m
* Magnetic detection in an area shaped like a rugby ball
Detection of personnel behind a wall
Detection of a vehicle approaching a danger zone
A detector deployed at a place where personnel and vehicle traffic intersects sounds an alarm when a vehicle with a mounted tag approaches. This way, personnel do not need to carry tags.
* Optional AC power supply available
Vehicle-to-vehicle proximity detection
Two-stage alarm
Basic setup
System configuration
Detector
Accessories: One speaker, one receiving antenna, and one power cable (5 m)
Tag (standard)
Size: 40*67*12.3 mm
Weight: 40 g
* Contact us to check the specifications of other tags.
Case studies on system deployment
Proximity detection between a vehicle (heavy machines) and personnel
Vicinity detection between vehicles (heavy machines)
Detection of a vehicle approaching a danger zone
Lineup of products
Detectors
Maximum detection distance: 8 m or 12 m
Power supply: DC 12/24 V (petrol-engine vehicles), DC 48 V (battery-operated vehicles) * Optional AC power supply available
Dust and waterproofing equivalent to IP65
Tags
- Standard tag (almost half the thickness of conventional models)
Easily attached to a helmet or carried in a pocket
- Thin tags with an alarm function
The thin and compact tags with a beeping alarm function can be attached to a helmet.
- Vehicle-mounted tags
The vehicle-mounted tags are designed for vehicle-to-vehicle proximity detection. * Contact us to find out their specifications.
Optional devices
Area setting device for not detecting tags
Tag checker
LED indicator
Reminder device for personnel to carry tags
Tag transmission switching device (optional customization)
Registration in NETIS for deployment in construction
The New Technology Information System (NETIS) is a database system operated by the Japanese Ministry of Land, Infrastructure, Transport and Tourism to encourage application of new technologies.
Registration of new technologies in this system facilitates prior studies and reduces risks involved in their deployment in public work and other construction projects.
In the NETIS, for additional deployment in construction, Yoshikawa Kogyo has registered its personnel proximity detection system currently deployed on manufacturing floors.
Registered name | Personnel proximity detection system for builders |
---|---|
Registration number | QS-150004-VE |
Overview | The system warns of potential danger to both an operator of a construction machine mounted with a detector and a construction worker carrying an IC tag when they get closer than a specified distance in any direction. The system can also warn of potential danger when construction machines get too close to one another. |
Registration data | 2015/5/25 |
Ropelike proximity alarm system
The ropelike system deployed around a hazardous material or a danger zone sounds an alarm when someone carrying a tag gets too close to it.
Features
- The system sounds an alarm when it detects a tag within the magnetic range of the ropelike sensor deployed around a hazardous material or a danger zone.
- Both a tag carried by personnel and the detector sound the alarm when the tag is magnetically detected.
- The system can detect tags employed in the personnel proximity detection system, which enables the two systems to be used together.