RayTek LineScanner MP150, Руководство по протоколу

Страница: 13 / 42

Transmission of Temperature Lines
MP150 Protocol
Rev. B4 Aug 2019
13
In this mode no buffering takes place to cope with a slow transmission rate: Pending lines will be
discarded.
4.2 The Data Mode (
DM
)
The data mode defines the type of information that will be sent as a “pixel”. The following modes are
defined:
4.2.1 Byte Mode for Temperature (
DMB
)
In this mode the pixel data contains temperatures which are scaled to eight bits. It is compatible to the
MP50.
The following formula should be used to translate the received data back to temperatures:
T = DataByte * (T
max
– T
min
) / 255 + T
min
T
min
is set with the command
SB0<T
min
>
.
T
max
is set with the command
ST0<T
max
>
.
4.2.2 Word Mode 1 for Temperature (
DMW
)
In this mode the pixel data is built up of two bytes (the least significant byte first). They give the
temperature in °C. This mode is compatible to the MP50.
(Example: 13
hex
, 02
hex
= 531°C)
4.2.3 Word Mode 2 for Temperature (
DMWT2
)
In this mode the pixel data contains temperatures which are built up of two bytes (the most significant
byte first). They give the temperature scaled to 16 bit. It extends the MP50 mode DMB to get a higher
resolution.
The following formula should be used to translate the received data back to temperatures:
T = DataWord * (T
max
– T
min
) / FFFF
hex
+ T
min
T
min
is set with the command
SB0<T
min
>
.
T
max
is set with the command
ST0<T
max
>
.
4.3 Count of Pixel (Point Mode,
PM
)
The point mode (
PM
) defines the count of pixel within the 90° field of view. Possible are: 64, 128, 256,
512 and 1024 pixel.
It is limited by the following equation:
countOfPixels * scanFrequency * 90° / fieldOfView <= 512pixel * 80Hz
The programmer is responsible to meet this equation
– the scanner will not change any of these three
parameters with setting another one (see also section 5.9.1 ).