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Table of Contents Introduction .............................................................................................................................................1 Information to the User ..........................................................................................................................1 Features of the Ubisensor .....................................................................................................................2 Installation and Operation Instructions .....
Introduction The Ubisensor V1.0 is a basestation used by the Ubisense In-Building Location System, which supports the real-time location of objects within buildings. It detects ultra-wideband (UWB) pulses emitted by wireless tags (Ubitags) located inside the building, allowing the 3D position of the tag to be found. The use of UWB technology enables greater positioning accuracy within buildings than other wireless technologies, because it is much less susceptible to multipath interference effects.
Features of the Ubisensor The diagrams below show several important features of the Ubisensor: Status LED Timing cable sockets Ventilation holes Networking socket Power supply socket MAC address (ID) label Ubisense – Ultra-wideband In-Building Location System – Ubisensor V1.
Installation and Operation Instructions Mounting options Ubisensors have five holes drilled in the back of the case, to which external clamps and brackets can be attached. Four of the holes are M4 size, the other hole is M6 size (and can be used in conjunction with a standard photographic camera mount). To attach a clamp, bracket or mounting plate to the back of the Ubisensor, it will be necessary to remove the rear of the device by undoing the four retaining screws (as shown in the photograph below).
Category 5e cable (or better). A timing cable from the master to a slave can be plugged into any free timing socket on the master, but must be plugged into the top right-hand timing socket on the slave, as shown in the diagram below. All sensors are connected to the standard building network using a Category 5 unshielded cable (or better), and to a power supply (typically via a 12V DC adaptor such as the Stontronics EPA121DA-12).
Calibrating the Ubisensor When the Ubisensor has been installed in its final location, its position and orientation must be found and entered into the Ubisense location system’s database. The Ubisense location system management tools make this calibration process simple and quick – refer to the software manual for details. Tuning the Ubisensor radio output power The master Ubisensor in each sensor cell transmits conventional radio messages to coordinate the activity of Ubitags in its vicinity.
When a sensor cell is selected, the Ubisense location system automatically turns off radio transmissions from the master Ubisensors of other sensor cells. By doing this, it is possible to tune the output power from the selected sensor cell’s master Ubisensor in isolation. 3. The dialog box should now show the current radio output power for the selected sensor cell’s master Ubisensor, as shown below.
5. Select a Ubitag and place it near the master Ubisensor. The Ubitag has two LEDs (whose positions are indicated on the diagram below) If the green LED flashes on the Ubitag, it is receiving radio messages from the master Ubisensor, and would (in normal operation) transmit UWB signals at that point in space. If the red LED flashes on the Ubitag, it is searching for radio messages from the master Ubisensor, and would not transmit UWB signals at that point in space.
8. Finally, when all sensor cells have been tuned, select the option “(no cell selected)” from the drop-down menu. This will re-enable the radio output of all master Ubisensors (and will set their output powers at the tuned values), and will re-enable transmission of UWB signals from Ubitags.
Ubisensor Specifications Conventional radio transceiver section (FCC ID: SEAUBISENSOR10) Number of channels: Lowest channel frequency: Highest channel frequency: Maximum output power: 7 908.36MHz 915.00MHz -7dBm General specifications Dimensions: Power supply: Operating temperature range: 200mm x 112mm x 70mm 12V DC, centre-pin positive -20ºC to +60ºC Ubisense – Ultra-wideband In-Building Location System – Ubisensor V1.
