ESD DTS2 Manual

Airborne data acquisition and telemetry system

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Electronic Systems Development
Airborne Data Acquisition And Telemetry System
DTS2
Rev 1.4
Note: Preliminary documentation
Please report any errors.
Last changes 2009/01/04

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Summary of Contents for ESD DTS2

  • Page 1 Electronic Systems Development Airborne Data Acquisition And Telemetry System DTS2 Rev 1.4 Note: Preliminary documentation Please report any errors. Last changes 2009/01/04...
  • Page 2: Warranty

    NOTICE © Copyright 2009 All Rights Reserved. This documentation and related hardware and software developed by Electronic Systems Development contains proprietary information protected by copyright. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form by any means electronic, mechanical, by photocopying, recording or otherwise without prior written permission from Electronic Systems Development.
  • Page 3: Read This First

    Read this First !! This is a Summery of Warnings found in this document. If some of these warnings are not observed damage may result to the equipment or data may be lost. Connecting The System Power. Page Warning !! Do not connect more than 13.8 V DC to the System power otherwise damage may result .
  • Page 4 INDEX PAGE INTRODUCTION DESCRIPTION SYSTEM FEATURES 3.1 CONTROLLER 3.2 GPS 3.3 ANALOG TO DIGITAL 3.4 PARALLEL I/O 3.5 TELEMETRY 3.6 SYSTEM POWER REQUIREMENTS SOFTWARE TELEMETRY PROTOCOL 5.1 TIMED PROTOCOL SYSTEM LIMITATIONS CONNECTIONS TO THE SYSTEM 7.1 CONNECTING THE SYSTEM POWER 7.2 CONNECTING THE RADIO ANTENNA 7.3 CONNECTING THE GPS ANTENNA 7.4 CONNECTING ANALOG INPUTS TO THE SYSTEM...
  • Page 5 Data Acquisition, Storage and Telemetry program. DTS2 has an 8 channel 12 bit ADC chip, user defined counter channels, user defined I/O ports, 6 Serial Channels ( RS232 ) and internal GPS and Radio Data Modem.
  • Page 6 2 serial Com ports ( RS232 ). The operating system is Imbedded DOS. GPS: ESD GPS1 Microblox 12 channel GPS module with external antenna. Conforms to NMEA data format. Connects to one of the serial ports on the controller. Position update of 1 per second.
  • Page 7 An optional LabView ( DTS2_VIEW.exe ) utility is available for monitoring the data output of the DTS2 on a graphical display. The LabView utility can be installed on a Laptop or Tablet PC with Win XP ( not supplied by ESD ). The Laptop running the application DTS2_VIEW must be connected to the DTS2 serial port P3.
  • Page 8 DTS2 Back Panel ANALOG Channels Serial I/O Radio Antenna GPS Antenna GPS Data Output Digital I/O Connections To The System Connecting The System To Power Both the Base and Airborne systems require 12 VDC. Warning !! Do not connect more than 13.8 V DC to the system power otherwise damage will result .
  • Page 9 The Raw GPS NMEA –0813 sentence string looks like this: $GPRMC,111621.00,A,3402.78600,S,01849.77818,E,0.039,249.04,101007,,,A*78 $GPGGA,111621.00,3402.78600,S,01849.77818,E,1,08,1.79,212.9,M,32.7,M,,*45 This string output from DTS2 can be connected directly to another data systems RS232 Serial port such as ADAS2000 or DMT and SEA data systems. Connecting Analog Signals To The System Warning !! Make sure that the analog voltages connected to the system do not exceed +-10 Volts.
  • Page 10: Signal Name

    The counter and Parallel I/O inputs to DTS2 can take from 5V to 28V inputs. When the fire button is pressed to fire a flare the connection from the button to DTS2 must go from 0V to +V. i.e. A voltage must be applied momentarily to enable the system to count the...
  • Page 11 CFG file - (FLAG_ON_TIME) parameter. The Flags can be used to indicate that a flare is burning and the user can specify the burn time of the flare. The Status LED’s On the front panel of the DTS2 there are 8 LED’s LED # Color...
  • Page 12 ADAS2000. If a laptop is used it can be connected to P3. Display This version of DTS2 does not have a VGA output for connection to a monitor. Configuring The System NOTE: The system BIOS setup and defaults are fixed and the user cannot change these settings.
  • Page 13 The default “over air” baud rate is setup at 4800 BPS, this can be changed to lower or higher baud rate but should not be done without consulting with ESD. Note that the Serial port setting is 19200 Baud , this should also not be changed by the user.
  • Page 14 ! DO NOT REMOVE THIS FILE FROM THE CF ! This File is only used by DTS2 software to check that there is a CF inserted. If the CF is not inserted then the DTS2 will send out the error message on the status RS232 Com Port 3 ( P3) “...
  • Page 15 The DTS2 can be user configured by editing the text file APP.CFG on the Compact Flash (CF) card. When the DTS2 boots it checks for a new configuration file on the CF card and copies this file to the on board A drive, the DTS2 then loads this new configuration at run time.
  • Page 16 MODEM SWITCH COM_PORT BAUD_RATE 19200 PTT_ON_TIME PTT_OFF_TIME CHECK_CD_BEFORE_TX NO ERROR_CHECKING SWITCH SAMPLE_RATE_PER_SEC 8 CHANNEL..cOFFSET...cSLOPE...vOFFSET...vSLOPE...NAME 2048 204.8 2048 204.8 2048 204.8 2048 204.8 2048 204.8 2048 204.8 2048 204.8 2048 204.8 SWITCH CHANNEL....….NAME COUNTER0 TIMEOUT0 COUNTER1 TIMEOUT1 COUNTER2 TIMEOUT2 COUNTER3 TIMEOUT2 COUNTER_DEBOUNCE 10 R_BURN L_BURN...
  • Page 17 11.5 The Airborne system CFG File APP.CFG explained. HEADER BASE Bethlehem,South_Africa +28.123 -028.321 AC_ID ZJRA TX_TIME_SLOT TX_SPACING BASE: can be any text describing the project base of operations. The text must not be longer than 20 characters and must be continuous without spaces. LAT: The BASE Latitude in dd mm.mmm format.
  • Page 18 The PDS is also sent out on this port if it is enabled ( set to ON). Always leave this set to OFF. COM_PORT can be set to 3,4 ,5 or 6. The com port settings have been factory set on this version of DTS2, leave these default settings as they are.
  • Page 19 The baud rate on this version of DTS2 is set to 19200 default but can be changed. The PTT_ON_TIME is the time from when the DTS2 asserts the Push To Talk on the radio before it starts sending data. This is a factory set parameter and should never be changed by the user.
  • Page 20 L_BURN R_BURN PIO is the Parallel I/O ports and counter channels of the DTS2. Switch should always be set to on. COUNTER0 can have a name attached to it. Any alpha numeric text, maximum 8 characters long to describe the counter usage.
  • Page 21: Display Switch Off

    This is only used for debugging purposes and should be left set to OFF for normal operation. LICENCE NUMBER 0D902865 The license number is unique to each system. ESD will issue the user with a valid license number. Data Storage The file name for the PDS,FLR and RAW files are automatically generated from the aircraft ID and the current date.
  • Page 22 Data Format The PDS file This is a TEXT string which will have a minimum of 58 chars + check sum + CR LF = 61 bytes long. The string length will vary depending on the parameters that have been switched on or off by the user.
  • Page 23: Analog Parameters

    ANALOG Parameters: The analog parameters can be individually selected ON or OFF and will also only be in the string if set to ON. The Value shown in the string will represent the actual physical parameter such as Temperature, Humidity etc. The User must determine what analog channel will be used for each sensor.
  • Page 24 Setting up the offset and slope parameters to convert the ADC counts into real physical parameter readings. cOFFSET means Count OFFSET, cSLOPE means Count SLOPE. The count will be from 000 to 4095 for a 12 bit ADC. DTS2 has a 12 Bit 8 Channel ADC. vOFFSET means Volt OFFSET, vSLOPE means Volt SLOPE.
  • Page 25 Step2 : Calculate the Cslope using the following equation: Cslope = ( 2 – 1 ) = 4096 = 204.8 (10 – (-10)) Step 3: Calculate the Coffset using the following equation: Offset = -( 204.8 x –10 ) = 2048 Determining the Vslope and Voffset to convert from volts to the specific parameter Step 1.
  • Page 26 Use good quality cable and connectors. Bad connections are the result of most system problems. If this is a new location or a new installation the GPS module used in the DTS2 will take a while to find an initial FIX. The ERROR light will stay lit while the GPS data is not valid.
  • Page 27: Gps Antenna

    If you are not sure about the above then please email or call for advice before using the CF cards in this system. You will need a CF card reader, these can be bought from any computer shop. (ESD does not supply CF cards or the CF card reader ).
  • Page 28 Appendix Block Diagram of DTS2 connections GPS Antenna 8A Breaker Pull to switch off UHF Antenna CI-106 RG 58 Coax Analog Signals from Sensors Flare Firing Buttons DTS has BNC Female +12V Power Output Minus Minus Input D type connectors...
  • Page 29 Shielded Teflon or RG178 Connection to Sensor with Shielded cable Signal Sensor DTS2 Recommended Flare Counter input Signal Wiring Note: Keep counter channel signals separated from each other and from other 25 pin D connector Parallel I/O. Cross Talk can cause a counter to increment when the other counter signal pulses.
  • Page 30: Mounting Bracket

    DTS2 Dimensions 242 mm 160 mm Including Rubber Feet 61mm 125mm 5mm Rubber Feet Mounting Bracket 20mm 11mm 30mm 242mm 17.5mm 160mm 125mm 17.5mm 302mm...
  • Page 31 24V to 12V DC to DC converter 87mm 98mm 48mm 22mm 22mm 43mm Mounting hole size...
  • Page 32: Base Station

    Base Station Mast Antenna Ribbon Cable Radio Modem Base Station S2E PCB -12V+ TAG Block V+ GND TX RX +12V 4 core Serial Cable to TITAN Note: 12V and GND both connect to the Radio 12V PSU Modem and to the S2E PCB as shown above The TX output from the S2E PCB ( GREEN wire) is connected to the RX...
  • Page 33 Connecting the Base Station unit If a serial cable is used for communications between the Base unit and TITAN a 3 core cable can be used to connect the 12V DC , Ground and TX signal from the Base unit. The TX signal from the Base unit must be connected to the TITAN machine 9 pin serial com port D connector pin 2.
  • Page 34 ( TITAN ) machine. The S2E can also be used to decrypt encrypted data if required. The CPU card used on this version is the ESD S2E Serial to Ethernet or Serial to Serial PCB. The Base Station must be supplied with 12VDC only The supply must not be less than 12VDC and not more than13.6 VDC.
  • Page 35 TITAN Parameter files that need setting up for ingesting and displaying Aircraft positions on the TITAN machine. The serial COM port 1 or 2 must be enabled on the TITAN machine to ingest the PDS from the Telemetry Base Station. The following files need to be Edited to set up the configuration for your Aircraft display: Rview.ops and EsdAcIngest.ops.
  • Page 36 ///////////// optional_field_names //////////////////// // Array of variable fields following fixed fields. // Used for comma-delimited format only. The comma-delimited format has // 10 fixed fields: callsign, year, month, day, hour, min, sec, lat, // lon, alt. These are followed by optional fields. This array specifies // the optional field list.
  • Page 37: Data Output

    //////////// enableParity //////////////////////////// // Flag for enabling parity checking. // If TRUE, parity generation is enabled for outgoing characters, and // checking enabled for incoming characters. If FALSE, parity generation // and checking is off. // Type: boolean enableParity = FALSE; ///////////// oddParity /////////////////////////////// // Flag for parity type.
  • Page 38: Test Setup

    ///////////// ascii_url /////////////////////////////// // ASCII SPDB URL. // Use if 'output_ascii' is TRUE. // Type: string ascii_url = "$(RAP_DATA_DIR)/spdb/ascii_ac_posn"; //====================================================================== // TEST SETUP. //====================================================================== ///////////// test_aircraft /////////////////////////// // Details of aircraft for TEST mode. // The test aircraft have a starting location, speed (knots) and // altitude (ft).
  • Page 39 Example of Rview.ops Only the part that deals with the aircraft tracks is shown here and is extracted from the Rview.ops file. Extract from Rview.ops: # flight tracks rview.plot_flight_tracks: false rview.flight_tracks_file: $(TITAN_HOME)/ftracks/flight_tracks # verification (chase-car) data plotting rview.plot_verify: false rview.verify_file: $(TITAN_HOME)/verify/chase_car_data rview.verify_time_margin: 300 # mouse double-clicking delay - set to your taste rview.double_click_delay: 0.3...
  • Page 40 ########################################################################## # plot flares? rview.plot_flares: true # You can plot ejectables as a cross, plus or both (asterisk) rview.plot_ejectables_as_cross: true rview.plot_ejectables_as_plus: true rview.ejectable_icon_size_km: 0.3 # set the colors for the end-burners, burn-in-place, and combination rview.end_burn_color: gold rview.burn_in_place_color: blue rview.end_burn_and_bip_color: magenta # line width varies with the number of flares burning.
  • Page 41 NOTES: Default Settings Default Serial Baud Rates Airborne System: P3 Status ( Serial I/O port ) = 19200. This can be changed in the APP.CFG file P9 GPS data output = 9600. This is Fixed and cannot be changed Modem Serial Baud Rate = 19200.

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