Odometer Input; Pitot Tube Input - Advanced Navigation Certus OEM Reference Manual

Certus Reference Manual • Interfacing
9.6.1.17 Reverse Alignment, Forward High
Type
:
GPIO Port
:
Auxiliary
:
Description :
9.6.1.18 Zero Angular Velocity Input
Type
:
GPIO Port
:
Auxiliary
:
:
Description

9.6.1.19 Odometer Input

Type
:
GPIO Port
:
Auxiliary
:
:
Description

9.6.1.20 Pitot Tube Input

Type
:
GPIO Port
:
Auxiliary
:
Description :
v2.4
Digital Input
1, 2
Receive
This function is designed to reverse the alignment settings for vehicles that can have two
vehicle forward directions, such as locomotives.
Digital Input
1, 2
Receive
In this function, a high state indicates to Certus that the vehicle is not rotating. The low
state indicates that the vehicle could be rotating. Use of this function can significantly
improve heading drift performance when a GNSS signal is not available.
Frequency Input
1, 2
Receive
This function is designed for low- resolution vehicle speed sensors and odometers. It
expects a normally low input with a high state for the trigger. If the pulse length is more
than 0.1 metres then this odometer input function should be used. If it is less than 0.1
metres, the wheel speed sensor function should be used. Contact technical support at
support@advancednavigation.com
Parameter
Trigger
Maximum Frequency
Maximum Pulse Rate
Table 33: Odometer Specifications
Frequency Input
1, 2
Receive
This function allows fixed wing aircraft to measure airspeed to improve navigation
performance. It requires a differential pressure sensor that has a frequency output such
as the Kavlico P992 (frequency output option) or the Paroscientific series 5300. Contact
technical support at support@advancednavigation.com
tube.
for help integrating with your speed sensor.
Value
Low → High
600 Khz
4294967 pulses/metre
Page 131
for help integrating with a pitot
2024-12-17