Personnel Vicinity Detection System「W Alert」

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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

The system magnetically detects any personnel behind a wall or another obstacle and sounds an alarm.

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

The system sounds an alarm when a vehicle carrying both a detector and tag is approached by another such vehicle, or vice versa.

Two-stage alarm

Yoshikawa Kogyo’s patented technology enables the system to sound two different alarms for tags detected on the outer and inner boundaries.

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

The device can assign a non-detection area for the driving seat of a vehicle operator with a tag. Non-detection areas can also be assigned by installing it in waiting areas or other safe zones.

Tag checker

The checker indicates the remaining battery level of a tag placed on it, for instance, at the beginning of each shift.

LED indicator

When a tag approaches a detector, the warning light turns on and its alarm sounds.

Reminder device for personnel to carry tags

The device is installed at the doorway (access route) to a job site to remind anyone without a tag to carry one before going further.

Tag transmission switching device (optional customization)

Personnel who press the button of the switching device can disable the tag transmission before moving on to their job site. They can pass the device without touching it to enable transmission from their tag.

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.