MIPEG 2000 Safe Load Indicator Monitoring System
- Conforms to all known Governmental requirements
- Large clear analogue and digital display for ease of viewing
- System is fully zone 1 certified
- Sensors using frequency based signal transmission immune to
electro magnetic interference and can withstand 10 times overload without
failure
- Operating parameters changed by simple panel mounted
hermetically sealed push buttons
- Easy adaptable software to handle specific customer
requirements
- Designed for high reliability and low maintenance with more
than 1300 Mipeg systems now in operation world wide (mid 2005)
- Customer specified inputs & outputs to interface with crane
control system
General Description
The Mipeg 2000 Safe Load
Indicator and Crane Monitoring System has been designed to provide crane
operators with the necessary information to meet all known world wide Government
requirements for crane safety. Additionally the monitoring feature provides the
vital information needed to enter a planned maintenance schedule based on crane
usage. The logged data may also be used in incident investigations.
The system comprises load and overturning moment (optional
sensors) together with an angle sensor all mounted on the crane structure. A
micro computer calculates the sensor data and provides a clear image of the
crane utilitsation on the operator's display.
The crane´s utilisation is automatically compared with the
crane design parameters permanently stored in the Mipeg's memory and outputs
to inhibit or to be used in the crane control system are generated.
The system includes a self-diagnostic facility to identify any
system irregularities. A standard lap-top computer is used for easy
calibration, test and service of the unit. The lap-top will also store the
crane usage data in its database. The real time logged data may also be
analysed using the COREP program.
The Mipeg 2000 system is available in several versions,
including full and non-recording.
Load and moment sensor
The load and moment
sensor(s) provide frequency modulated electrical signals which are
proportional to the hook load on main and/or whip lines or the tipping
moment of the crane. The sensor is certified according to Atex II 2 GD EExd
IIB T6 for use in hazardous zone 1 and is compensated for operation in
temperatures from -20 to +80 deg C. Signal transmission is immune to electro
magnetic interference and the sensor can withstand a ten-fold permissible
overload without loss of performance. The sensor is sealed to IP67.
Boom angle sensor
The boom angle sensor or
inclinometer is a gravity based sensor and is certified according to Atex II
2 GD EExd IIB T6 for use in zone 1 areas. The enclosure is of galvanised
cast iron, sealed to IP66.
Operator's display
This display is back
lit for night operation and shows on digital displays:
- Safe working load (SWL)
- Actual load
- Sea condition
- Hook radius
- Rope falls
- Rime & date
- % of memory used and on a large analogue scale
- hook load as a percentage of SWL
Alarm lights, providing a clear and continous warning
indicating that the preset limits, typically 95% (yellow light) & 110% (red
light) of permitted load, have been exceeded, are incorporated into the display.
Push buttons are provided to change no. of falls, sea
condition and to activate test functions and optional features.
The unit is certified II 2G EExia IIB T4 according to the Atex
standard for use in hazardous zone 1 and sealed to IP65.
Computer cabinet
The microcomputer is
housed in a steel box. Easy access to the electronics is obtained through
the hinged front door. The box contains the sensor interface, micro computer
and solid state circuitry to interface with the display and crane
alarm/control intputs and outputs. (Zone 1 version is housed in a galvanised
cast iron box).
The system will store data for all crane curves and thereby
cater for all sea state and reeving configurations. Retention of this data
is unaffected by loss of power.
The system operates on a 24 V D.C. supply. A power conversion
unit for other voltages can be provided to suit customers electrical supply.
The unit is sealed to IP66 and certified to II 3G EEx nC IIC
T4 for use in hazardous zone 2. (Zone 1; verson is sealed to IP66 and
certified II 2(1)G EExd d(ia)IIB T6). Operating temperature for both
versions are -20 to +50 degrees C (-4 to +122 degrees F).
Crane monitoring
The MIPEG 2000 combines
safety with crane maintenance through the recording facility built into the
system. The system records and stores accumulated data from start of
operation and data for each individual lift as:
- Dynamic and static hook load
- Dynamic and static over turning moment
- Radius and no. of falls
- Sea condition and duration of the lift
- Other operational data as requested.
The data is stored in a lap-top PC and using the COREP
evaluation program the data may both be used as input to the crane maintenance
program as well as incident investigations.