Gigasense Bridge Crane Alarm System Overhead Motion Sensor Microwave Anti Collision

Product Description

Bridge Crane Alarm System Overhead Motion Sensor Microwave Anti Collision Device

Gigasense crane safety/Microwave anti collision system

 

GIGASENSE

Gigasense products within Force Measurement and Crane Safety are well known high quality products, built from many years' experience and used by leading heavy duty industry around the world.
Gigasense products meet the highest demands of performance level requirements. We are represented by many selected local partners in more than 30 countries on six continents.

SPECIFICATIONS

• Type designation: GII.
• Alarm limits' distance: 2 - 40m, the maximum working range varies for different frequencies from 25m to 50m due to restricted output power (EIRP, see appendix 1.
• Accuracy of limits: +/- 1m. To achieve 1 m accuracy for different speeds, the function SPD (Speed compensation) can be necessary to use.
• Sample frequency of the SFCW radar measurement: 128 ms.
• Speed range: Specified in Appendix 1.
• Speed dependence: The alarm limits can be compensated (20 - 1500%) according to different speeds. Minimum value is 10%.
• Relay outputs: 3 switching potential free relay contacts (max. load 250VAC / 8 A). The Relay outputs are used for braking and stopping the crane movement and correspond to the alarm limits, Limit 1 and Limit 2. The third relay output is used for the failure alarm.
• The Limit 1 output relay can be given a pulsing function suitable for a warning lamp.
• Analogue output 4-20 mA: for example, a remote display, corresponding to the distance between the units. 4 mA = 2 m and 20 mA = 40 m (maximum range, see appendix 1). Normal load 250 Ohms. The output must not be used for decisions.
• Supply Voltage complete system: 24 VDC.
• Supply Voltage antenna box (should be powered via relay unit): 12 VDC.
• Supply Voltage Transponder unit: 12 VDC.
• Power consumption Antenna/Transponder unit: 200 mA.
• Power consumption Relay box: 100mA.
• Permitted ambient temperature: -25 ... +70 °C.
• Degree of protection: IP66/67 (Relay unit), IP56 (Antenna unit).
• Relative humidity: 10 to 80% (no condensation).
• Max. altitude: 2000 m.
• Transmitter frequency: 9.9 ... 10.6 GHz, see appendix 1.
• Radiated power defined as EIRP, see appendix 1.
• SFCW (Stepped Frequency Continuous Wave), see appendix 1.
• Dimension's antenna (H x W x D) 440 x 359 x 372 mm & weight 5.9 kg.
• Relay box (H x W x D) 175 x 125 x 75 mm 0.8 kg.
• GROSS WEIGHT/DIMENSION: 1 system incl. packing (Unit A + Unit B) = 13,5 kg / 510 x 510x 290 mm.
• 
  Options:
• Parameter setting program, to set parameters and download/upload parameters via a PC. Cable with Molex RS232 connection required.
• Power supply box 100- 240 VAC (or other required voltages).
• Transponder Unit A or Unit B (crane to be protected from track end or wall). The Transponder Unit works against an active unit with relay box.
• Power bank backup of the modulated "fingerprint" reflection.
• Supplied cable pre-connected in the antenna box (max. 30m), ordered per meter.

Tower Crane Alarm System Overhead Safety Microwave Anti Collision Device System 

System Pictures

CONSTRUCTION
The antenna is made of cast, stove-enameled Aluminum which can be separated into two parts, the Reflector, and the Antenna box (IP56).

The relay box contains a micro controller, output relays, terminal connections, display and push buttons. The housing is an IP66/67 standard polycarbonate enclosure. The terminal blocks have easy access by pushing a screwdriver to connect the wires.

INSTALLATION

The location and alignment of the antennas is important, the location of the Relay boxes is not critical. The antennas must be placed opposite of each other. The reflector has three fitting holes suited for 8 mm bolts (not included in delivery).

A good location is often the barrier of a platform or a ladder, the barrier of the girder etc. provided that they are rigid and not resonant when the crane moves.
If the crane has the ground/earth terminated to the crane construction, the GII antenna (reflector) shall be isolated by rubber bumps or equal, when fixed with the three bolts in the crane.
For correct detection of the unmodulated signal reflection (in case of error in one unit), it  is necessary to have a surface of metal with minimum 1 m² behind the antennas. A plate of 1 m² or larger can be installed behind the antennas, if the location of the installation do not have enough surface of metal behind the antennas. See figure below.