Sirrah LS08 – Sway sensor


DescriptionSIRRAH LS08

SIRRAH is a sensor giving angle positions of a hoisting system fitted with an infrared transmitter : to use for sway regulation and skew control.
The coordinates are evaluated as plus or minus relative to the axis of the detector.
In its LS08 version, Sirrah is improved for inside or outside handling of coils with overhead travelling cranes.
It is waterproof and insensitive to the ambient infrared.
The infrared beacon transmits I.R. modulated energy waves, which enables a good measure whatever the distance.
The safety measure is total. 


Sirrah sensor, fixed on the overhead bridge crane’s trolley,
analyses the beacon position fixed on the hoist.
It is the sway sensor function or positioning sensor X, Y of a load.
Its high speed of measure enables itself to enter in a sway readjustment loop.
If the hook is fitted with two infrared beacons and the trolley with
two LS08, the crane computer can also regulate the skew movement of the load. 


Sirrah is presented in a monolithical way, in a box including optics,
electronics and the processor for the measurement control.
A calculator or a programmable robot can be directly connected to
Sirrah to enable the use with several softwares.
Sirrah is associated to one or several I.R. beacons to put on the hook.
Beacon is independent from the sensor and synchronises itself automatically on it.    


Technical Specifications

  Degrees At 5 m in mm At 25 m in mm
Numerical resolution
Sensor resolution at 200 Hz 5/1000 0,3 1
Sensor resolution at 20 Hz 1/1000 < 0,1 0,3
Long distance non linearity      
* at the sensor center   9 30
* on 50% of the field   17 52

Working range :   Up to 25 m
Saturation distance :   Down to 1,5 m ; depending on beacon adjustment
Measurement frequency :   Up to 200Hz in mode 1 “mono beacon”: anti-sway function and X, Y positioning
Output frequency :   Programmable by the outside calculator
Average of measures :   Programmable by the outside calculator
Detector type :   Optical : View angle of  +/- 7°
    Narrow band interferential filters
Infrared source :   880 nm LEDs beacon
Communication :   With a serial line computer : RS422 or RS232 or PROFIBUS
Power supply :   220VAC / 0,2A or 120 VAC / 0,4A   50/60 Hz or 24VDC
Environment :   Working temperature : -20°C to  +50°C
Storage temperature :   -40°C to +70°C
Protection :   IP 54
Weight :   About 2,6 Kg
Dimensions :   About  120 x 120 x 260 mm
Notes :   All the results are given in R.M.S. values at 20°C
Software :   functioning mode choice : 1, 6, 7 / Angular speed option choice

Sales References 

LS08        Sirrah sensor +/- 7° (220VAC, RS422)      
LS08-P    Sirrah sensor +/- 7° (220VAC, PROFIBUS)
LS08-D    Sirrah sensor +/- 7° (24VDC, RS422)
SCB4        Power supply cable 220 VAC   
SCB5        Power supply cable 110 VAC   
SCB6        Power supply cable 24VDC   
SCB13      RS422 cable
SCB14      RS232 cable
SCB15      PROFIBUS cable
Associated beacon : Ref. BMU-02 (modes 1,6,7)

Download Product Data Sheet

Réalisation SYSTONIC 2008