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WATSON INDUSTRIES DMS-EGP01, Руководство пользователя

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Watson Industries, Inc. 

 

DMS-EGP01 Rev A  02/12/2015 

 

24 

Appendix C 

Binary Data Format 

The unit will output up to 6 words at 71.11 frames per second set at 9600 Baud. One word per output parameter. 
 
 
Example 1: The Unit is seeing these conditions: 
 

 
 
 

 
 
2) Binary output Format: 
 

 
 
 

 

7

6

5

4

3

2

1

0

7

6

5

4

3

2

1

0

Data Word

MSB

LSB

 

 
Bit 7 of the MSB is set to 1. Bits 6 to 0 of the MSB are the upper 7 bits of the data. (sign plus 6 bits of data) 
Bit 7 of the LSB is set to 1. Bits 6 to 0 of the LSB are the lower 7 bits of the data. 
 
 As the data words are received, the LSB is shifted left to shift out the 7th bit (always set to 1).  The MSB is then 
connected to the LSB as a 16 bit word.  This word is then shifted left to shift out the 7th bit (always set to 1).  What 
remains is a signed fractional word with a resolution of 13 bits plus a sign bit. 
 
 
To convert binary data: 
 

 
 
 
 

 
Need split each word into two bytes: 
 

 
 
 
 

 
 
 
Remove the most significant bit from each byte: 
 

 
 
 
 

 
 
 
 

Bank 

Elevation 

Heading 

X angular rate 

Y angular rate 

Z angular rate 

15.0˚ 

-5.0˚ 

315.0˚ 

10.0˚/sec 

-15.0˚/sec 

55.0˚/sec 

Word1 

Word2 

Word3 

Word4 

Word5 

Word6 

<CR> byte 

0x85AA 

0xFE9C 

0xF080 

0x8399 

0xFB99 

0x91CC 

0x0D 

Bank 

Elevation  Heading  X Rate 

Y Rate 

Z Rate 

0x85AA 

0xFE9C 

0xF080 

0x8399 

0xFB99 

0x91CC 

Bank 

Elevation  Heading  X Rate 

Y Rate 

Z Rate 

0x85 
0xAA 

0xFE 
0x9c 

0xF0 
0x80 

0x83 
0x99 

0xFB 
0x99 

0x91 
0xCC 

Bank 

Elevation  Heading  X Rate 

Y Rate 

Z Rate 

0x05 
0x2A 

0x7E 
0x1C 

0x70 
0x00 

0x03 
0x19 

0x7B 
0x19 

0x11 
0x4C 

Содержание DMS-EGP01

Страница 1: ...1 Rev A 02 12 2015 1 DYNAMIC MEASUREMENT SYSTEM OWNER S MANUAL PART NUMBER DMS EGP01 GPS Module Antenna WATSON INDUSTRIES INC 3035 MELBY STREET EAU CLAIRE WI 54703 Phone 715 839 0628 FAX 715 839 8248...

Страница 2: ...ndix A 16 Activating Command mode or Double Spacebar Access to commands 18 Determining and Setting Output Channels 18 Setting Output Format 19 Setting Heading Mode 19 Setting Velocity Mode 19 Setting...

Страница 3: ...enance software to store data in non volatile memory within the DMS The DMS EGP01 differs from a standard DMS with the addition of a GPS antenna and receiver The GPS receiver also provides a vehicle v...

Страница 4: ...in degraded attitude accuracy Power Connectors This unit has an internal regulator to allow operation over a wide voltage input range Best operation is obtained at either 12 or 24 VDC although operati...

Страница 5: ...erface section that can be used to send data to the user In normal operation the DMS takes data from its internal rate sensors and integrates in a closed loop system with the accelerometers as a long...

Страница 6: ...will output sensor data normally unless it receives a control mode command Once a command is received the DMS will send data in response and await the next command Using this mode the user can retriev...

Страница 7: ...2 5 05 0 273 4 00 4 01 2 10 4 017 3 CR 1 Bank angle 2 elev angle 3 Head angle 4 X axis rate 5 Y axis rate 6 Z axis rate 7 Forward Velocity 8 9 space space space space space space space The string tran...

Страница 8: ...available to the user others are used at the factory for alignment and calibration 1 An R or r will set the outputs analog and serial to their Reference Command modes This will also disable the logic...

Страница 9: ...return to operation with the least disturbance to the system All other unspecified characters such as carriage return line feed and space are ignored by the system If there are problems with the syste...

Страница 10: ...andled through simple changes in the scale factor stored in the EEPROM in the microprocessor This can be done with a PC and the assistance of the factory The digital signal that the DMS can receive is...

Страница 11: ...titude 2 ft Accuracy Latitude Longitude 1 5m rms Environmental Temperature Operating 40 C to 85 C Temperature Storage 55 C to 85 C Vibration Operating 5g rms 20 Hz to 2 KHz Vibration Survival 10g rms...

Страница 12: ...k Angle Analog Output 15 Elevation Angle Analog Output 16 Heading Angle Analog Output 17 X Axis Acceleration Analog Output 18 Y Axis Acceleration Analog Output 19 Z Axis Acceleration Analog Output 20...

Страница 13: ...Watson Industries Inc DMS EGP01 Rev A 02 12 2015 13 Figure 2 Antenna Dimensions...

Страница 14: ...for a particular purpose Excluded from any warranty given by Watson Industries are products that have been subject to abuse misuse damage or accident that have been connected installed or adjusted co...

Страница 15: ...elby Street Eau Claire WI 54703 ATTN Service Department Telephone 715 839 0628 Fax 715 839 8248 email support watson gyro com Returning the Product Product shall be packaged making sure there is adequ...

Страница 16: ...User Channel 4 9 99 VDC 10 VDC Ground Track 2 Forward Velocity 399 9 Km hr 400 Km hr Latitude 3 89 99999 90 4 bytes Longitude 3 179 99999 180 4 bytes Altitude 4 21500 Feet 21500 Feet 2 Feet count Tem...

Страница 17: ...ng fail 1 GPS Velocity fail 2 Not used always zero 3 Reference Command selected 4 GPS enabled 5 Free Mode selected 6 Analog Switches disabled 7 Not used always zero Example The flag channel output in...

Страница 18: ...currently active To change which channels are output type this will bring up the menu again Now type 2 to set up channels The following message will appear To proceed type Y or y Now each channel wil...

Страница 19: ...mode the GPS antenna must be connected to the DMS To set the heading mode to Relative Heading type 2 This is the normal DMS mode non GPS In this mode the GPS antennas do not need to be connected To ma...

Страница 20: ...mode when using the GPS module To set to Analog Velocity type 2 This is the normal DMS mode non GPS Make sure that the proper analog velocity signal is applied To make this selection the default the n...

Страница 21: ...shut off Altitude Correction type 2 To make this selection the default the next time you power the unit on type in a quote mark TYPE IN THE NUMBER OF YOUR SELECTION OR Q TO QUIT 1 ADJUST TIME CONSTANT...

Страница 22: ...angular displacement signals Careful note should be taken of the angles indicated in the reference mode The sensor should then be tipped on the pivot into the other stable position and the angle agai...

Страница 23: ...the sensor at a 45 angle to the horizontal in pitch only taking care not to move the sensor at an angular rate of more than 100 sec The Forward Lateral and Vertical Acceleration outputs should not cha...

Страница 24: ...B is then connected to the LSB as a 16 bit word This word is then shifted left to shift out the 7th bit always set to 1 What remains is a signed fractional word with a resolution of 13 bits plus a sig...

Страница 25: ...the data Bank Elevation Heading X angular rate Y angular rate Z angular rate 2728 912 57344 1636 2460 9008 Convert to units counts x scale factor For bank elevation Scale factor is 180 32768 counts Fo...

Страница 26: ...resolution of 13 bits plus a sign bit To convert binary data Need split each word into two bytes Remove the most significant bit from each byte Shift lower byte left once to remove 1 bit space between...

Страница 27: ...ngular rate Y angular rate Z angular rate 0 920 3144 1636 2460 9008 Convert to units counts x scale factor For Bank Elevation Scale factor is 180 32768 counts For Heading Scale factor is 360 65536 cou...

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