2D Laser Scanner LMS-Q240i

 

DETAILED INFORMATION

For download:
PDF- Data Sheet LMS-Q240i (155.752 byte)

 


KEY FEATURES

  • Maximum range 650 m @ 80 % target 
  • Ranging accuracy 20 mm
  • Data rate 10 000 meas. / sec 
  • Scanning rate up to 80 scans / sec
  • Scanning range up to 80°
  • Perfectly linear scan
  • Rugged  IP64 housing
  • Integrated TCP/IP Ethernet interface
  • Input for GPS time synchronization

MAIN APPLICATIONS

  • Airborne laser scanning

  • Long-range guidance of autonomous vehicles 

 

General 

The RIEGL LMS-Q240i 2D Laser Scanner makes use of the pulsed time-of-flight range measurement principle and beam scanning by means of an opto-mechanical scan mechanism, providing fully  linear, unidirectional and parallel scan lines. 

The instrument is extremely rugged, therefore ideally suited for the installation on board of an aircraft, and also compact and lightweight enough to be used under narrow space conditions (e.g. in small single-engined planes, helicopters or on other vehicles). The instrument needs only a single supply voltage and provides the scan data via an integrated TCP/IP Ethernet interface. The binary data stream can easily be post-processed by user´s software using the available software library. The laser scanner LMS-Q240i offers the unique combination of wide scanning angle, high maximum range, high measuring accuracy, narrow laser beam, all that within a compact and robust housing.

 

Principle of Operation 

principle of operation

The range finder electronics (1) of the 2D laser scanner LMS-Q240i is optimized in order to meet the requirements of high speed scanning (fast laser repetition rate, fast signal processing and high speed data interface).


The angular deflection of the laser beam (2) is realized by a rotating polygon (3) with a number of reflective surfaces. It rotates continuously at an adjustable speed to provide a unidirectional scan within an angle of q = 60° (LMS-Q240i-60) or  q = 80° (LMS-Q240i-80).


For every measurement RANGE, SCAN ANGLE, SIGNAL AMPLITUDE, and optionally a TIMESTAMP are provided via a TCP/IP Ethernet interface (4). The LMS-Q240i is prepared to accept a TTL-signal (i.e., 1 pulse per second) from, e.g., a GPS receiver, to reset an internal timer, which is used to timestamp every measurement.

 

Technical Data 

Rangefinder Performance
Maximum Measurement Range 1)
for natural targets, r³ 20%
for natural targets, r³ 80%		 up to 320 m
up to 650 m
Minimum Range 2 m
Accuracy 2) 20 mm
Precision 2) 15 mm
Laser Pulse Repetition Rate 30 000 Hz
Effective Measurement Rate 10 000 Hz
Laser Wavelength near infrared
Laser Beam Divergence 3) 2.7 mrad
Target detection modes 4) first target, last target 5), or alternating
Eye Safety Class
according to IEC60825-1:1993+A1:1997+A2:2001
The following clause applies for instruments
delivered into the United States:
Complies with 21 CFR 1040.10 and 1040.11
except for deviations pursuant to Laser Notice No. 50,
dated July 26, 2001.		 Laser Class 1 for the scanned laser beam

Class 1 Laser Product

Scanner Performance


LMS-Q240i-60 LMS-Q240i-80
Scanning Mechanism rotating polygon mirror rotating polygon mirror
Scanning Range 6) ± 30 deg = 60 deg total ± 40 deg = 80 deg total
Scanning  Rate 6 to 80 scans/sec 5 to 60 scans/sec
Angle Step Width delta deta 6)
between consecutive laser shots		 0.04 deg 0.04 deg
Angular Resolution 0.005 deg 0.005 deg
Internal Sync Timer Option for GPS-synchronized timestamping of scan data
Scan Sync
 Option for synchronizing scan lines to external timing signal
Data Interfaces
for Configuration & Data Output
for Configuration
for Data Output 		TCP/IP Ethernet, 10/100 MBit/sec
RS232, 19.2 kBd
ECP standard (enhanced capability port) parallel
General Technical Data
Input Voltage range 18 - 32 V DC
Current Consumption approx. 1.8 A @ 24 V DC
Main Dimensions (diameter x length) 180 x 374 mm
Weight approx. 7 kg
Protection Class IP64, dust and splashwater proof
Temperature Range
Operation
Storage
-10 °C up to +50 °C
-20 °C up to +60 °C
Mounting M6 and M8 steel thread inserts
1) The following conditions are assumed:
  • target is larger than the footprint of the laser beam
  • normal incidence of laser beam
  • visibility 10 km
  • average ambient brightness

2) One sigma @ 50 m range under RIEGL test conditions.
3) Foot print of laser beam: 26.5 cm at 100 m, 52.5 cm at 200 m, 105 cm at 400 m, 157 cm at 600 m
4) Only one target distance per measurement can be provided.
5) For last target measurement, the last echo of up to 4 echoes is provided. For n echoes with n > 4, always echo number 4 is supplied as last pulse target distance.
6) Scanning parameters can be set  via RS232 or TCP/IP configuration interface.
Data Sheet LMS-Q240i, 14/09/2006

Information contained herein is believed to be accurate and reliable. However, no responsibility is assumed by RIEGL for its use. Technical data are subject to change without notice.


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Last updated 15/09/2006