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MARVELMIND Indoor GPS Starter Set – HW v4.9 + IMU

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MARVELMIND Indoor GPS Starter Set – HW v4.9 + IMU 수량증가 수량감소 1290000 (  )
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Description

Content:

  • 4 Stationary beacons with standard 50mm antennas
  • 1 Mobile beacon with IMU (3D accelerometer + 3D gyroscope + 3D magnetometer) onboard
  • 1 Modem supporting up to 30 beacons

Marvelmind Indoor Navigation System is off-the-shelf indoor navigation system designed to provide precise (±2cm) location data to autonomous robots, vehicles (AGV), and copters. It can also be used to track other objects with a mobile beacon installed on them, for example, forklifts in warehouses or virtual reality (VR) helmets or helmets for construction workers or miners, etc.

The navigation system is based on stationary ultrasonic beacons united by radio interface in a license-free band (433MHz or 915MHz). The location of a mobile beacon is calculated based on the propagation delay of an ultrasonic signal (Time-Of-Flight or TOF) to a set of stationary ultrasonic beacons using trilateration. No manual calibration is required. No need to know exact locations of the beacons – the system builds the map of beacons automatically.

The set contains a mobile beacon with IMU that gives a possibility for ultrasonic + IMU (3D accelerometer + 3D gyro + 3D magnetometer) fusion. That allows much faster update rate – up to 100Hz and above.

Key requirements proper system functionality:

  • For 3D (X, Y, Z) tracking – An unobstructed sight by a mobile beacon of three or more stationary beacons simultaneously
  • For 2D (X, Y) tracking – An unobstructed sight by a mobile beacon of two stationary or more stationary beacons simultaneously
  • Distance to the nearest 2 or 3 beacons – not more than 30 meters (recommended). In ideal conditions – up to 50 meters
  • Mobile beacon with IMU onboard
Technical Details

Distance between beacons

  • Reach up to 50 meters in lab conditions
  • Recommended distance is 30 meters (Transducer4 to Transducer4 looking straight at each other and other transducers are off)

Coverage area

  • Reach up to 1000 m2 with the Starter Set configurations
  • Coverage for larger territories is similar to cellular networks

Location precision

  • Absolute: 1–3% of the distance to the beacons
  • Differential precision: ±2 cm

Location update rate

  • 0.05–45Hz
  • Can be set manually
  • Depends on the distance between the mobile and stationary beacons (shorter distance — higher update rate)
  • Depends on the number of mobile beacons: for example, update rate of 25Hz for 1 mobile beacon will result in update rate of 25Hz/2 for 2 mobile beacons, and 25Hz/3 – for 3 mobile beacons, etc
  • Depends on the radio interface profile (500kbps vs. 38kbps)
  • Slightly depends on the number of stationary beacons—different than for mobile beacons

Power supply

Internal:

  • LiPol battery 1000mAh
  • Battery lifetime depends on usage
  • Stationary beacon with 16Hz update rate => up to 72h (tested)
  • Stationary beacon with 1Hz update rate => ~72h*16 => 1 month
  • Mobile beacon with 8Hz update rate – 12h (tested)

External:

  • microUSB – recommended for permanent use

Weight

Mobile beacon from Starter Set:

  • 59 grams (including battery 1000mAh and housing and antenna 50mm)
  • 27 grams (bare board w/o battery)

Beacon size

  • 55x55x33 mm (with 50mm antenna: 55x55x65mm)



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