View source for OpenIGTLink/ProtocolV2/Unit

[[OpenIGTLink/ProtocolV2/Index | &lt;&lt; Version 2 Index Page]]


SENSOR message can handle a part of unites defined in The International System of Unites (SI) in its 8-byte (or 64-bit) field. The field is designed to specifiy a unit consisting of SI-prefix (e.g. milli, micro, kilo etc...) and combination of SI-base and/or SI-derived unites. The bites in the field are assigned as follows:

  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...
  |PREFIX |   UNIT0   |  EXP0 |   UNIT1   |  EXP1 |   UNIT2   | EXP2
  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...
  0               1               2               3               4 
 
     ...-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
        EXP2 |   UNIT3   |  EXP3 |   UNIT4   |  EXP4 |   UNIT5   |  EXP5 |
     ...-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
         4               5               6               7

'''PREFIX (4bit)'''
{| border="1" cellpadding="5" cellspacing="0" align="center"
|-
| align="left" style="background:#eeeeee;" | Value
| align="left" style="background:#eeeeee;" | SI-prefix
| align="left" style="background:#eeeeee;" | Value
| align="left" style="background:#eeeeee;" | SI-prefix
|-
| align="left" | 0x0
| align="left" | None
| align="left" | --
| align="left" |--
|-
| align="left" | 0x1
| align="left" | deka (deca) (1e1)
| align="left" | 0x9
| align="left" | deci (1e-1)
|-
| align="left" | 0x2
| align="left" | hecto (1e2)
| align="left" | 0xA
| align="left" | centi (1e-2)
|-
| align="left" | 0x3
| align="left" | kilo (1e3)
| align="left" | 0xB
| align="left" | milli (1e-3)
|-
| align="left" | 0x4
| align="left" | mega (1e6)
| align="left" | 0xC
| align="left" | micro (1e-6)
|-
| align="left" | 0x5
| align="left" | giga (1e9)
| align="left" | 0XD
| align="left" | nano (1e-9)
|-
| align="left" | 0x6
| align="left" | tera (1e12)
| align="left" | 0XE
| align="left" | pico (1e-12)
|-
| align="left" | 0x7
| align="left" | peta (1e15)
| align="left" | 0XF
| align="left" | femto (1e-15)
|-
|}


'''UNIT(6bit)'''
<center>SI base units</center>
{| border="1" cellpadding="5" cellspacing="0" align="center"
|-
| align="left" style="background:#eeeeee;" | Value
| align="left" style="background:#eeeeee;" | SI base unit name
| align="left" style="background:#eeeeee;" | Value
| align="left" style="background:#eeeeee;" | SI base unit name
|-
| align="left" | 0x01
| align="left" | meter
| align="left" | 0x05
| align="left" | kelvin
|-
| align="left" | 0x02
| align="left" | gram
| align="left" | 0x06
| align="left" | mole
|-
| align="left" | 0x03
| align="left" | second
| align="left" | 0x07
| align="left" | candela
|-
| align="left" | 0x04
| align="left" | ampere
| align="left" | --
| align="left" | --
|-
|}

<center>SI derived units</center>
{| border="1" cellpadding="5" cellspacing="0" align="center"
|-
| align="left" style="background:#eeeeee;" | Value
| align="left" style="background:#eeeeee;" | Unit name
| align="left" style="background:#eeeeee;" | dimension
| align="left" style="background:#eeeeee;" | Value
| align="left" style="background:#eeeeee;" | Unit name
| align="left" style="background:#eeeeee;" | dimension
|-
| align="left" | 0x08
| align="left" | radian
| align="left" | meter/meter
| align="left" | 0x12
| align="left" | ohm
| align="left" | meter^2-kilogram/second^3-ampere^2
|-
| align="left" | 0x09
| align="left" | steradian
| align="left" | meter^2/meter^2
| align="left" | 0x13
| align="left" | siemens
| align="left" | second^3-ampere^2/meter^2-kilogram
|-
| align="left" | 0x0A
| align="left" | hertz
| align="left" | /second
| align="left" | 0x14
| align="left" | weber
| align="left" | meter^2-kilogram/second^2-ampere
|-
| align="left" | 0x0B
| align="left" | newton
| align="left" | meter-kilogram/second^2
| align="left" | 0x15
| align="left" | tesla
| align="left" | kilogram/second^2-ampere
|-
| align="left" | 0x0C
| align="left" | pascal
| align="left" | kilogram/meter-second^2
| align="left" | 0x16
| align="left" | henry
| align="left" | meter^2-kilogram/second^2-ampere^2
|-
| align="left" | 0x0D
| align="left" | joule
| align="left" | meter^2-kilogram/second^2
| align="left" | 0x17
| align="left" | lumen
| align="left" | candela-steradian
|-
| align="left" | 0x0E
| align="left" | watt
| align="left" | meter^2-kilogram/second^3
| align="left" | 0x18
| align="left" | lux
| align="left" | candela-steradian/meter^2
|-
| align="left" | 0x0F
| align="left" | coulomb
| align="left" | second-ampere
| align="left" | 0x19
| align="left" | becquerel
| align="left" | /second
|-
| align="left" | 0x10
| align="left" | volt
| align="left" | meter^2-kilogram/second^3-ampere
| align="left" | 0x1A
| align="left" | gray
| align="left" | meter^2/second^2
|-
| align="left" | 0x11
| align="left" | farad
| align="left" | second^4-ampere^2/meter^2-kilogram
| align="left" | 0x1B
| align="left" | sievert
| align="left" | meter^2/second^2
|-
|}


'''EXP''' (4-bit)
{| border="1" cellpadding="5" cellspacing="0" align="center"
|-
| align="left" style="background:#eeeeee;" | Value
| align="left" style="background:#eeeeee;" | Exponent
| align="left" style="background:#eeeeee;" | Value
| align="left" style="background:#eeeeee;" | Exponent
|-
| align="left" | 0x0
| align="left" | ^0
| align="left" | --
| align="left" |--
|-
| align="left" | 0x1
| align="left" | ^1
| align="left" | 0xF
| align="left" | ^-1
|-
| align="left" | 0x2
| align="left" | ^2
| align="left" | 0xE
| align="left" | ^-2
|-
| align="left" | 0x3
| align="left" | ^3
| align="left" | 0xD
| align="left" | ^-3
|-
| align="left" | 0x4
| align="left" | ^4
| align="left" | 0xC
| align="left" | ^-4
|-
| align="left" | 0x5
| align="left" | ^5
| align="left" | 0XB
| align="left" | ^-5
|-
| align="left" | 0x6
| align="left" | ^6
| align="left" | 0XA
| align="left" | ^-6
|-
| align="left" | 0x7
| align="left" | ^7
| align="left" | 0X9
| align="left" | ^-7
|-
|}