Collision Avoidance

Gigasense Anti-Collision function

Anti Collision System for track bound cranes (EOT) in heavy duty industrial environment. Fail-safe, easy to install, robust and maintenance free. Protects Property and production.


To protect two cranes: one crane uses an A-unit and one crane uses a B-unit. A- and B-units each consists of an active antenna and a relay box. The antenna sends a Microwave signal to the opposite unit. By using SFCW (Stepped Frequency Continuous Wave) radar, the distance and relative speed are calculated.

To protect a crane from a wall or a track end: one transponder without the relay box can be used together with a complete A- or B- unit on the crane.

The output relays switches at preset alarm limits to reduce speed and stop the crane movement.

Settings and readout of parameters are easily accessible via a display and push buttons in the relay box. The relay box contains three relays: Relay 1 = Warning (speed reduction) or flashing light. Relay 2 = Stops crane movement. Relay 3 = Failure/unidentifi ed object alarm.

One analogue output, 4-20mA is available for e.g. remote display.

Control of the output relay functions

These setting modes are available:


Speed dependent relays (the alarms are active if the speed exceeds the minimum speed settings).

Mode 2.

Distance dependent (the relays are in alarm state when the crane is within the alarm limit distances).

Mode 3.

Speed dependent relays (as Mode 1), except that Relay 2 alarm must be reset before operating the crane at active alarm.

Safety & Environment

  • Avoids crane accidents and protects property and production.

  • Designed to work in the toughest conditions such as in Steel works, Harbours, Mines etc.

  • Fail Safe operation due to supervision of function, both in antenna box and relay box.

  • The signal is very hard to disturb, the A- and Bunits use different frequencies, different polarization of the Microwaves and a "fingerprint" radar reflection. The function has a backup capacitor incase of power failure.

  • The anti collision system is not disturbed by rain, dust/metal particles, fog or sunlight.

Download Data Sheet (PDF)