OXTS RT-Backpack Bedienungsanleitung
User Manual
RT-Backpack
Vehicle-to-pedestrian
tracking
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Legal notices
Information furnished is believed to be accurate and reliable. However, Oxford Technical Solutions
Limited assumes no responsibility for the consequences of use of such information nor for any
infringement of patents or other rights of third parties which may result from its use. No licence is
granted by implication or otherwise under any patent or patent rights of Oxford Technical Solutions
Limited. Specifications mentioned in this publication are subject to change without notice and do not
represent a commitment on the part of Oxford Technical Solutions Limited. This publication
supersedes and replaces all information previously supplied. Oxford Technical Solutions Limited
products are not authorised for use as critical components in life support devices or systems without
express written approval of Oxford Technical Solutions Limited.
All brand names are trademarks of their respective holders.
The software is provided by the contributors “as is” and any express or implied warranties, including,
but not limited to, the implied warranties of merchantability and fitness for a particular purpose are
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exemplary, or consequential damages (including, but not limited to, procurement of substitute goods
or services; loss of use, data, or profits; or business interruption) however caused and on any theory
of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any
way out of the use of this software, even if advised of the possibility of such damage.
Copyright notice
© Copyright 2021, Oxford Technical Solutions.
Revision
Document Revision: 210303 (See Revision History for detailed information).
Contact details
Oxford Technical Solutions Limited
Park Farm Business Centre
Middleton Stoney
Oxfordshire
OX25 4AL
United Kingdom
Tel: +44 (0) 1869 814 253
Fax: +44 (0) 1869 251 764
Web: https://www.oxts.com
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Warranty
Oxford Technical Solutions Limited warrants its products to be free of defects in materials and
workmanship, subject to the conditions set forth below, for a period of one year from the Date of Sale.
“Date of Sale” shall mean the date of the Oxford Technical Solutions Limited invoice issued on
delivery of the product. The responsibility of Oxford Technical Solutions Limited in respect of this
warranty is limited solely to product replacement or product repair at an authorised location only.
Determination of replacement or repair will be made by Oxford Technical Solutions Limited personnel
or by personnel expressly authorised by Oxford Technical Solutions Limited for this purpose.
In no event will Oxford Technical Solutions Limited be liable for any indirect, incidental, special or
consequential damages whether through tort, contract or otherwise. This warranty is expressly in lieu
of all other warranties, expressed or implied, including without limitation the implied warranties of
merchantability or fitness for a particular purpose. The foregoing states the entire liability of Oxford
Technical Solutions Limited with respect to the products herein.
Environmental protection
Waste electrical products should not be disposed of with household waste. Please recycle where
facilities exist. Check with your Local Authority or OxTS representative for recycling advice.
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Contents
Legal notices .......................................................................................................................................1
Copyright notice...................................................................................................................................1
Revision...............................................................................................................................................1
Contact details.....................................................................................................................................1
Warranty..............................................................................................................................................2
Environmental protection.....................................................................................................................2
System overview.....................................................................................................................................4
Scope of delivery.....................................................................................................................................4
Specification............................................................................................................................................5
Assembly instructions .............................................................................................................................5
Configuring the RT-Backpack.................................................................................................................6
NAVconfig settings..............................................................................................................................6
NAVconfig Options.........................................................................................................................11
RT-Range Settings............................................................................................................................11
Initialisation and warm-up .....................................................................................................................12
Charging the battery..............................................................................................................................12
Using the RT-XLAN...............................................................................................................................12
Configuration.....................................................................................................................................13
Operation...........................................................................................................................................13
LED indicators................................................................................................................................13
Checking the communication link......................................................................................................14
Revision history.....................................................................................................................................14
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System overview
The RT-Backpack is a collection of small and lightweight components that transform any RT sensor
into a wearable RT-Range target object. This makes it ideal for testing and validating advanced driver
assistance systems (ADAS), especially where there is a need to track pedestrians, cyclists or
motorcyclists.
While the RT-Backpack is packaged differently, the principal of operation is the same as an
RT-Range target. RT-Range hunters do not differentiate between data received from target
RT-Ranges or RT-Backpacks and treat both as mobile targets. For that reason, only information
unique to the RT-Backpack is covered in this manual. All other relevant information can be found in
the RT-Range manual.
Scope of delivery
Table 1 lists all standard items delivered with the RT-Backpack. Table 2 lists optional components.
Table1.StandardRT-BackpackComponents
Qty
Description
1
Backpack
1
Frame including fasteners
1
50 cm pole including fasteners
1
RT Backpack bolt pack –Qty 5 x M4x8 hex bolts & washers, 3 mm & 4 mm hex key
1
Survey grade antenna for multi-path rejection
1
1 m TNC-TNC GPS antenna cable
1
7 Ah, 12-volt battery
1
14C0077B user cable
1
RT-XLAN (client) wireless LAN radio and PoE cable
1
2.4 GHz antenna
1
Base-to-antenna extension pole and L bracket (RT-XLAN)
1
Wiring harness
1
Mains powered battery charger
1
RT-Backpack user manual
Table2.OptionalRT-BackpackComponents
Qty
Description
1
Radio modem for DGPS signals (country specific)
1
Radio antenna (country specific)
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Specification
Table3.RT-BackpackTechnicalSpecifications
Parameter
Specifications
RT-XLAN Radio Range—Line of Sight (m)
>500
RT-XLAN Delay (ms) RMS
<10
Temperature Range (°C)
-10 to 50
Dimensions (mm)
340 × 270 × 180
Mass (kg)
5
Assembly instructions
Assembly of the RT-Backpack is not complicated but requires care to avoid damaging components.
Please follow this process while referring to the diagram in Figure 1:
1. Use 3 mm hex driver to screw the three M4 × 8 mm cap head screws into the RT (leaving the
top left hole free. The screws should be tightened firmly to prevent movement, but not overly
tight. Mount the RT sensor [3] in the frame [4] by sliding the RT over the side rails until the
three bolts fit snugly into their housing. Screw the remaining thumb screw through the hole on
the side and then tighten the remaining hex screws to secure the RT. For non-permanent
installations the RT sensor can be mounted using only three screws as access is restricted to
the screw nearest the main switch in the frame.
2. If the optional DGPS radio [2] is being used for differential corrections, this should be fitted
using the supplied hook and loop strips. Push one of the strips, hook-side towards the RT,
through the furthest slot from the edge and pull as far through as you can. Push the end back
through the slot closest to the edge of the frame. Place radio with the TNC connector at the top
on the bracket and secure with the hook and loop strap.
3. Use the U-bolts and dome head nuts to fix the mounting pole and antenna [1] into the frame
with a 10 mm spanner. A flat washer and spring washer should be fitted under each nut. Attach
one end of the antenna cable to the antenna. Ensure the frame is inside the bag before sliding
the antenna pole through both U-Bolts and the corresponding hole in the backpack until it
reaches the base. The hole in the backpack is narrow so the antenna cable should also be
pushed through at the same time. Tighten the dome head nuts when the antenna pole is in
place. The supplied antenna may differ from the one shown in the diagram but will provide
equivalent or superior performance.
4. The user cable can now be connected. Start by attaching it to the RT sensor. Route the other
wires carefully through the frame to their respective components. This is clearly marked on the
loom. The ethernet connector should be connected to the LAN port of the front connector.
5. The RT-XLAN power cable should also be connected to the DC connector and the rear M12
connector next to the battery. Connect the power cable to the battery [5]. Connect the positive
terminal first, then the negative one. Connect the radio aerial to the radio’s TNC connector and
push through the corresponding hole in the backpack. Lastly, connect the antenna cable to the
RT’s primary antenna connector.
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6. The frame front plate [6] can now be attached to the main frame using four M6 × 12 mm button
head screws.
7. Attach the base of the RT-XLAN to the antenna through the bracket. Screw the similar black
plastic bracket to the front of the front plate. Lift the hole in the front of the backpack over the
RT-XLAN bracket and then attach the extension pole to the bracket. The RT-XLAN [7] should
be attached to the Base-to-Antenna Extension Pole fixed to the boss on the frame front plate.
The RT-XLAN can then be height adjusted for maximum performance.
8. The RT-Backpack is turned on using the toggle switch mounted near the top of the RT sensor.
NB: this switch is located under the charging point [3].
Figure1.AssemblyoftheRT-Backpack
Configuring the RT-Backpack
NAVconfig settings
Some RT models have different options. These are set when the correct model is selected in Step 1
of NAVconfig (Figure 2). Settings can be prepared in advance as NAVconfig does not require a
device to be connected.
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Figure2.NAVconfigStep 1-ProductSelection
A predefined setting for the RT-Backpack is included with NAVconfig. This is normally located at
C:\Program Files (x86)\OxTS\RT-Range\RT-Back. Use the Read Settings from a Folder option to
locate it. See Figure 3.
Figure3.NAVconfigStep 2-ReadConfiguration
In an RT-Backpack application the y-axis always points left and the z-axis always points forwards
(Figure 4). This is set automatically from the predefined settings file.
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Figure4.NAVconfigStep 3-Orientation
The primary antenna measurements will be read from the predefined settings file when used (Figure
5). It is important to re-check the “Above”measurement as the antenna pole may be set to a different
height (z-axis) to the one used in the settings file.
Figure5.NAVconfigStep4-PrimaryAntenna
The RT-Backpack does not use dual antennas, so make sure that option is disabled (Figure 6).
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Figure6.NAVconfigStep5-SecondaryAntenna
The advanced slip option (Figure 7) is not applicable to the RT-Backpack. Ensure it is disabled.
Figure7.NAVconfigStep6-Advanced Slip
Several settings should be checked on the options page (Figure 8). Most importantly, Displace Output
should be disabled. The RT-Range applies any displacement. For a full explanation of options see
NAVconfig Options on page 11.
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