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Air Data Unit飞行数据记录单元

The Air Data Unit is used to measure pitot airspeed and barometric altitude in fixed-wing aircraft. It features high accuracy temperature calibrated pitot and static air data sensors and outputs data over RS232. It can be used standalone or connected to one of Advanced Navigation’s INS products for outstanding navigation accuracy in fixed-wing aircraft when GNSS is not available.

Features

Temperature Calibrated Pressure Sensors

The Air Data Unit features very high accuracy absolute and differential pressure sensors. These are factory calibrated over a wide temperature range to further increase measurement accuracy and provide the best air data possible through varying conditions.

 

Power Up Self-Calibration

On top of factory temperature calibration, every time the air data unit powers up, it performs a self excitation calibration to adjust for small deviations of bias and scaling error. This allows the system to compensate for calibration ageing and means that it never needs to be returned to the factory for recalibration.

 

Reliability

The Air Data Unit is built on top of a safety oriented real time operating system and all software is designed and tested to safety standards with fault tolerance. Its communication interface is optically isolated and the hardware is designed and tested to MIL spec.

Specifications

Sensors

Low Speed

Maximum Airspeed                               63 m/s

Minimum Valid Airspeed                       8.0 m/s

Airspeed Accuracy                                0.5 m/s

Altitude Accuracy (turn on to turn on)  18 m

Altitude Accuracy (in run)                     1 m

Altitude Resolution                               0.0015 m

Airspeed Resolution                             0.00005 m/s

Calibrated Temperature Range           -20 to 60 °C

Burst Airspeed Pressure                      34 kPa

 

Standard

Maximum Airspeed                               225 m/s

Minimum Valid Airspeed                       20 m/s

Airspeed Accuracy                                1.0 m/s

Altitude Accuracy (turn on to turn on)  18 m

Altitude Accuracy (in run)                     1 m

Altitude Resolution                               0.0015 m

Airspeed Resolution                             0.00001 m/s

Calibrated Temperature Range           -20 to 60 °C

Burst Airspeed Pressure                      103 kPa

 

High Speed

Maximum Airspeed                               420 m/s

Minimum Valid Airspeed                       48 m/s

Airspeed Accuracy                                2.0 m/s

Altitude Accuracy (turn on to turn on)  18 m

Altitude Accuracy (in run)                     1 m

Altitude Resolution                               0.0015 m

Airspeed Resolution                             0.00004 m/s

Calibrated Temperature Range           -20 to 60 °C

Burst Airspeed Pressure                      310 kPa

 

Communication

Interface                    RS232

Interface Isolation     Optically Isolated

Speed                       115200 baud

Protocol                    AN Packet Protocol

Output Data Rate     20 Hz

 

Hardware

Operating Voltage                    5 to 36 V

Input Protection                        ±40 V

Power Consumption (Typical)  0.075 W

Operating Temperature            -20 °C to 85 °C

Environmental Protection         IP67 • MIL-STD-810G

Shock Limit                              100 g

Dimensions                              48 x 42 x 32 mm

Weight                                      55 grams