Wiser Systems Inc. B01017 ユーザーズマニュアル
15
WISER RRLT Quick Start Guide
2017
Tracking Tags with Time-Difference-Of-Arrival
In the previous sections, tracking was performed through time-of-flight measurements of distance. In
this section, the user is shown how to conduct tag tracking with time-difference-of-arrival (TDOA).
TDOA offers greater energy savings for the tag, as it only has to transmit a ping at periodic intervals.
this section, the user is shown how to conduct tag tracking with time-difference-of-arrival (TDOA).
TDOA offers greater energy savings for the tag, as it only has to transmit a ping at periodic intervals.
Each WISER Mini Tracking Tag included is ready for immediate assembly and use. To track
individual tags, first insert a battery into each chip to be used, positive side away from the chip. Then
simply put the tracking chip into an enclosure, battery-fastener up on the handle-side of the enclosure
as shown in the image below, and snap the enclosure shut to secure the chip.
individual tags, first insert a battery into each chip to be used, positive side away from the chip. Then
simply put the tracking chip into an enclosure, battery-fastener up on the handle-side of the enclosure
as shown in the image below, and snap the enclosure shut to secure the chip.
1) Once the devices are set up in the previous sections, you can immediately initialize for Tag
tracking by selecting menu option Tag Tracking → Initialize for Tag Tracking. If successful,
you should get the message: “Tag Initialize Successful. 1 clock(s) being used.”
you should get the message: “Tag Initialize Successful. 1 clock(s) being used.”
2) Select menu option Tag Tracking → Run Tag Tracking. All powered tags should appear in the
tracking area.
One of the active devices can also be used as a tag, but first it must be set. If not previously done,
identify one “Active Tracking” antenna by selecting from the menu: “Active menu: Active Tracking →
Initialize for Active Tracking.
identify one “Active Tracking” antenna by selecting from the menu: “Active menu: Active Tracking →
Initialize for Active Tracking.
1) For demonstration purposes, only one of the active devices is converted to a “tag” at one time.
To do this, select the menu item (menu: Tag Tracking → Set Active Device as Tag). This will
set the active device to operate in tag mode with a 2 Hz ping rate. Note: to disable Tag behavior
of the active device, it must be unplugged from its battery and re-plugged in.
set the active device to operate in tag mode with a 2 Hz ping rate. Note: to disable Tag behavior
of the active device, it must be unplugged from its battery and re-plugged in.
2) To start tracking, go to select the menu item: Tag Tracking → Run Tag Tracking. At this point,
the ‘tag’ should appear on the screen.
3) To stop tracking, go to select the menu item: Tag Tracking → Stop Tracking.
Note that greater tag accuracy can generally be accomplished by adding additional Antenna Nodes
throughout the area. It is recommended to use at least four Antenna Nodes, at a minimum, while
tracking in relatively open areas. Greater numbers may be needed in more cluttered environments.
throughout the area. It is recommended to use at least four Antenna Nodes, at a minimum, while
tracking in relatively open areas. Greater numbers may be needed in more cluttered environments.