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The
hardware |
Data Acquisition
Unit
| Data
Acquisition Unit is a mobile part of the BlueEyes system.
Its main task is to fetch the physiological data from the sensor
and to send it to the central system to be processed. To accomplish
the task the device must manage wireless Bluetooth connections
(connection establishment, authentication and termination).
Personal ID cards and PIN codes provide operator's authorization. |
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Communication
with the operator is carried on using a simple 5-key keyboard,
a small LCD display and a beeper. When an exceptional situation
is detected the device uses them to notify the operator.
Voice
data is transferred using a small headset, interfaced to the
DAU with standard mini-jack plugs.
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The
Data Acquisition Unit comprises several hardware modules:
- Atmel
89C52 microcontroller - system core
- Bluetooth
module (based on ROK101008)
- HD44780
- small LCD display
- 24C16
- I2C EEPROM (on a removable ID card)
- MC145483
- 13bit PCM codec
- Jazz
Multisensor interface
- beeper
and LED indicators
- 6
AA batteries and voltage level monitor
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PowerPoint
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Central
System Unit
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Central
System Unit hardware is the second peer of the wireless connection.
The box contains a Bluetooth module (based on ROK101008) and
a PCM codec for voice data transmission.
The
module is interfaced to a PC using a parallel, serial and
USB cable. The audio data is accessible through standard mini-jack
sockets.
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To
program operator's personal ID cards we developed a simple
programming device. The programmer is interfaced to a PC using
serial and PS/2 (power source) ports. Inside, there is Atmel
89C2051 microcontroller, which handles UART transmission and
I2C EEPROM (ID card) programming.
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