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Products for Robot Localization, Development, Interaction, and Research
Overview
NorthStar
ERSP
ER1
NorthStar - Low-cost Indoor Localization

Overview
How It Works
Integration
Specifications
Digital Interface
Software
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Specifications

Detector Unit

Product Details (Detector)
Basic Specifications

  • Dimensions: 3cm x 4cm x 1cm [1.2" x 1.6" x 0.4"]
  • Weight: 0.4 oz [12.5g]
  • Power: 3.3 VDC, 200mA
  • Communications: Serial in and out, 19200-115200 baud, 5V tolerant interface
  • Ambient Lighting Conditions:
    • Maximum ambient light, point source: 600 LUX
    • Maximum ambient light, diffuse conditions: 2500 LUX
  • Max Distance from Detector Plane to Light Plane: 6 m [20 ft]
  • Field of View (FOV):
    • Square Shaped Area, with width w
    • Recommended FOV:
      • w = 1.4 X distance from detector plane to light plane
      • Example: 2.5 m Ceiling, FOV = 3.6 m X 3.6 m [12 ft X 12 ft]
    • Max FOV:
      • w = 2.4 X distance from detector plane to light plane
      • Example: 2.5 m Ceiling, FOV = 6 m X 6 m [20 ft X 20 ft]
  • Single Measurement Time: 100 msec
  • Room ID Codes: 10
  • Spot ID Codes: 20


Projector Unit

Localization Performance for Mobile Robots
(assuming typical household environment)1

Repeatability - Enables return to a previous position and orientation or creating a map for planned navigation (e.g., return to charging station, multi room navigation, etc.)
(these values assume a stable environment)
MetricWithin Recommended FOVWithin Max FOV
Position*1cm - 4cm10cm - 40cm
Heading*1deg - 4deg2deg - 8deg

Heading Consistency - Enables travel parallel to previous passes (e.g., efficient & thorough floor coverage)
MetricWithin Recommended FOVWithin Max FOV
Heading*<1 - 2deg<2 - 8deg
Heading (bidirectional,
100ms)
Unidirectional + 2 degUnidirectional + 5deg
*Based on an average of 1 to 10 readings per second. Values represent one sigma error.

Heading Accuracy - Enables capability to aim in a particular global direction (e.g., toward a charging station)
MetricWithin Recommended FOVWithin Max FOV
Heading< 2deg< 5deg

Position Linearity - Enables capability to measure true distances or create a uniformly spaced and orthogonal map
MetricWithin Recommended FOVWithin Max FOV
Position< 6% distance from
origin (typical)
< 25% distance from
origin (typical)

Localization Performance for Asset Tracking
(assuming a typical commercial environment)2

Position Repeatability - To ascertain an asset is located at a previously defined position, e.g., in front of a potato chip display in aisle 12
MetricWithin Recommended FOVWithin Max FOV
Position< 15cm< 1m


All specifications subject to change without notice. Contact Evolution Robotics for a current product specification.

12.5 m [8 ft] ceiling, low luster white paint, 6 m X 6 m [20 ft X 20 ft] room, static & stable environment
2Fixed detector, light source on moving asset, 6 m distance between detector and light planes

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Downloads
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ERSP® 3.1 Documentation
ERSP Vision Demo
-Usage Instructions
Navigation Video
NorthStar Documentation
 

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