As a continuation of our discussion
about robotic sensors today we will talk about robotic laser
rangefinder sensors, which are one of the most accurate type of distance
measuring sensors, with reading errors not exceeding a few millimeters.
These sensors can do distance measurements as well as speed and
acceleration readings on certain objects with respect to the mobile
robot. They operate by sending a pulse of light into the environment and
measure the time until it is received back at the sensors, then
distance is calculated. The maximum range of a laser sensor can vary
from hundreds of meters to hundreds of kilometers. This very same
technology is used to do measurements between celestial objects with
great accuracy.
1. Parallax Laser Range Finder
The sensor module is based on Parallax’s Propeller microcontroller and has an effective detection range between 15 and 122 centimeters. It features a CMOS camera and a laser diode to determine distance to the object by means of trigonometry. The sensor can be employed for distance and liquid level measurements, object detection as well as counting items when employed as such.
Features:
- Effective measurement range: 15-122 cm (6-48 in);
- Accuracy: 3% average error, less than 5% peak error;
- Maximum detection range: 240 cm (8 ft);
- Sample rate: 1 Hz;
- Power consumption: 5 VDC, 150 mA;
- Communication interface: serial, auto-detect 300-115.200 baud;
- Operating temperature: 0-50 degrees C (32-122 degrees F).
2. LightWare SF02 Laser Range Finder
The LightWare SF02 is a long distance sensor, capable of measuring distances up to 40 meters, or 130 feet. It is suitable for both indoor and outdoor applications and has a 12 Hz output data rate, making it suitable for fast moving applications such as aerial drones. It is readily programmable with Arduino (library and examples). Its price tag is US$ 349 making it very attractive for small to medium projects.
Features:
- Measurement range and resolution: 0-40 m (0-130 feet) @ 1 cm (0.39 in);
- Accuracy: ±( 0.1 + 1%) m;
- Sample rate: 12 Hz;
- Power consumption: 6.5-9VDC or 5VDC, 150 mA;
- Communication interface: analog, digital, USB;
- Operating temperature: 0-40 degrees C (32-104 degrees F);
3. Hokuyo URG-04-LX-UG01 Scanning Laser Range Finder
Features:
- Effective measurement range: 2-560 cm (0,79-220 in);
- Angle of view: 240 degrees;
- Resolution: 1 mm distance, 0,36 degrees angular;
- Accuracy: 6-100 cm – 30 mm, 100-409 cm – 3%;
- Maximum detection range: 560 cm (220 in);
- Command system: SCIP 2.0;
- Power consumption: 5 VDC, 2,5 W;
- Communication interface: USB 2.0/1.1, mini-B connector;
- Weight: 160 g;
- Operating temperature: -10 – +50 degrees C (14-122 degrees F).
Find out more about sensors in our article Introduction to Mobile Robot Sensor Systems
4. Hokuyo UBG-05LN Scanning Laser Range Finder
Features:
- Effective measurement range: 0,1-5 m long, 4 m wide;
- Angle of view: 180 degrees;
- Accuracy: less than 1 m – 20 mm, over 1 m – 2%;
- Repeatability: less than 1 m – 10 mm, over 1 m – 2%;
- Hysteresis: 6,25%;
- Maximum detection range: 5 meters (16,4 ft);
- Power consumption: 24 VDC and 150 mA (supports between 18 and 30 VDC);
- Communication I/O: Wire connections
- Input:
- Photo-coupler input (Anode common, Each input ON current 4mA)
- Detecting area changeover
- Set area number by input leads 1-5;
- Emission-stop by getting input leads 1-5 to ON (OFF: H level input, ON: L level input);
- Output:
- Photo-coupler/open-collector output(30VDC 50mA or less)
- Output 1: OFF when detected in area
- Output 2: OFF when detected in area
- Output 3: OFF when detected in area
- Output 4(Trouble output): ON during normal operation
- Housing protection rating: IP64;
- Weight: 180 g (260 g with cable);
- Operating temperature: -10 – +50 degrees C (14-122 degrees F).
5. Loke LMC-J-0040 Series Laser Distance Measuring Devices
Features:
- Effective measurement range: 0,2-35 m (0,66-115 ft);
- Accuracy: 2-3 mm depending on conditions;
- Repeatability: 0,5 mm;
- Measure rate: 5-10 Hz;
- Maximum detection range: up to 150 m (492 ft) with special reflective surfaces;
- Power consumption: 10-30 VDC, 1,5 W;
- Communication interfaces: switchable RS232/RS422 with selectable data output, 9600 baud, analog 4-20 mA;
- Housing protection rating: IP65;
- Weight: 850 g;
- Operating temperature: -10 – +50 degrees C (14-122 degrees F).
6. Loke LMC-J-0050 Series Laser Distance Sensor
Features:
- Effective measurement range: 0,2-30 m (0,66-115 ft);
- Accuracy: 2-3 mm depending on conditions;
- Repeatability: 0,5 mm;
- Measure rate: 5-10 Hz;
- Maximum detection range: up to 150 m (492 ft) with special reflective surfaces;
- Power consumption: 10-30 VDC, 1,5 W;
- Communication interfaces: RS232/RS422/RS485 with selectable data output, ProfiBus, SSI, analog 4-20 mA, Ethernet, WiFi, Bluetooth, CANopen, CAN 2.0;
- Housing protection rating: IP66;
- Weight: 4,3 kg;
- Operating temperature: -10 – +50 degrees C (14-122 degrees F);
7. Hokuyo UBG-04LX-F01 Scanning Laser Range Finder
Features:
- Power source: 12VDC;
- Detection Range: 2 to 560 cm (White Square Kent Sheet 80mm 240°);
- Angular Resolution: 0.36°(360°/1,024 steps);
- Accuracy Nominal Range: 6 to 100 cm – 1 cm, 100 to 409 cm – 1% of distance;
- Scan Time: 28 ms/scan;
- Interfaces: USB 2.0, RS-232C (19.2k, 57.6k, 115.2k, 250k, 500k, 750kbps);
- Ambient temperature and humidity: -10 to +50 degrees C, less than 85% RH (without dew and frost);
- Impact Resistance: 196 m/s2, 10 times in X, Y and Z direction;
- Weight: 260g (with cable attachment).
8. Hokuyo UTM-30LN/30LX Scanning Laser Range Finders
Features:
- Power consumption: 12VDC, nominal 0.7 A, peak 1 A;
- Light source (for 30LX): Semiconductor laser diode(λ=905nm);
- Detection Range: 0.1 to 30 m (White Square Kent Sheet 500mm or more), Max. 60 m and 270°;
- Accuracy: 0.1 to 10 m – 3 cm, 10 to 30m – 5 cm;
- Angular Resolution: 0.25° (360°/1,440 steps);
- Scan Time: 25 ms/scan;
- Sound level: Less than 25 dB;
- Connections: Power and output – 2m flying lead wire, USB – 2 m cable with type-A connector;
- Ambient temperature and hmidity): -10 to +50 degrees C, less than 85%RH (without dew and frost);
- Impact Resistance: 196 m/s2, 10 times in X, Y and Z direction.
9. Acuity SRI500 Precision 3D Laser Scanner
Features:
- Scan Angles: Azimuth ± 300, Elevation ± 65;
- Scan Speed: Vertical: 500 lines/s max, Horizontal: 1000 degrees/s max;
- Range Accuracy: 2.4 cm;
- Maximum Range: 85% Reflectance Lambertian Surface 500 feet;
- Minimum Range: 5 feet;
- Laser Wavelength: 905 nm;
- Average Laser Power: < 1 mW;
- Laser Interlock: Vertical scan mirror encoder;
- Laser Spot Divergence: 2 millirad H × 0.5 millirad V;
- Optical Aperture: 2” × 8.5”;
- Scan Motors: Long life brushless DC;
- Power: 50-500 W (scan pattern dependent) at 12-28 VDC.
Photo credits Hokuyo, Loke, Acuity, Parallax and LightWare.
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