Innovative Safety Initiative Award 2013 Jointly Organized by DEVB, CIC and HKCA CHUN WO-CRGL-MBEC JOINT VENTURE Contract No. HY/2009/19 Central- Wan Chai.

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Presentation transcript:

Innovative Safety Initiative Award 2013 Jointly Organized by DEVB, CIC and HKCA CHUN WO-CRGL-MBEC JOINT VENTURE Contract No. HY/2009/19 Central- Wan Chai Bypass – Tunnel (North Point Section) and Island Eastern Corridor Link

Gantry Crane Ultrasonic Warning System for Mobilization Gantry crane is selected for lifting and transporting of pre-cast bridge segment at storage yard, due to heavy lifting and transportation efficiency. There are two blind points while segment is lifting and the gantry operator is not able to notify.

SWL 160 TON Bang!

Gantry Crane Ultrasonic Warning System for Mobilization In order to eliminate the hazard, the pro-active warning system for gantry crane mobilizing on rail is installed by using the ultrasonic sensor to detect obstacle / pass-by worker on rail. The progressive visual is generated by flash light and audio warning sign is triggered by buzzer to crane operator. The system also eliminates the blind point while segment is lifting, where the visual paths of gantry crane are blocked by segment. It is greatly appreciated by gantry operator.

Gantry Crane Ultrasonic Warning System for Mobilization General view of gantry crane

Ultrasonic sensor Gantry Crane Ultrasonic Warning System for Mobilization Ultrasonic sensor Control box

Configuration and wire connection of control box Gantry Crane Ultrasonic Warning System for Mobilization Device set up on crane Control box Ultrasonic sensor

Visual warning display & audio warning device installed at operating cabin Gantry Crane Ultrasonic Warning System for Mobilization Buzzer Visual display

Left side warning device detects worker walks near the leg of crane. Pre-warning visual and audio signal is given. Worker walks near the leg of crane Gantry Crane Ultrasonic Warning System for Mobilization

Worker works close to the leg of crane Gantry Crane Ultrasonic Warning System for Mobilization Left side warning device detects worker walks closed to leg of crane, visual and audio warning signal is given.

Left side warning device detects worker walks very closed to the leg of crane, stop operation in visual and audio warning is given. Gantry Crane Ultrasonic Warning System for Mobilization Worker walks very close to the leg of crane

Ultrasonic sensor installed at leg of gantry crane Gantry Crane Ultrasonic Warning System for Mobilization Warning zone of ultrasonic warning device Ultrasonic sensor

1.5M 1M 0.5M SWL 160 TON Bi-Bi-Bi Bi

Warning zoneRange of warning zone LED Light (Visual) Warning sound (Audio) Action should be taken by crane operator Pre-warning zone >1.2mPoint mark onlyBi (one tone) Alert Buffer zoneAbout 1.0 ~ 1.2m Blue markBi-Bi tone (3/4 sec.) Alert Buffer zoneAbout 0.8 ~ 0.9m Green markBi-Bi tone (1/2 sec.) Prepare to slow down Buffer zoneAbout 0.4 ~ 0.7m Yellow markBi-Bi-Bi (1/3 sec.) Slow down Stop zoneAbout 0.1 ~.03m Red markBi-Bi-Bi (1/5 sec.) Stop at once Gantry Crane Ultrasonic Warning System for Mobilization Visual and Audio signal for warning zone and action taken