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32 - LANDING GEAR
32-49-00 TIRE PRESSURE INDICATING SYSTEM
PRESENTATION
CONTENTS:
Function
Description
Self Examination
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TIRE PRESSURE INDICATING SYSTEM PRESENTATION
FUNCTION
The function of the Tire Pressure Indicating System
is to supply:
- pressure information, for each tire, to be
displayed on the ECAM,
- warnings when pressure in one or more tires
does not agree with the specified pressure.
The warning functions of the system are as follows:
- to show that the absolute pressure of any tire
is lower than a given value,
- to tell the flight crew when the pressure
difference between 2 tires installed on the
same wheel axle is above a given value,
The indication becomes amber in case of abnormal
pressure.
DESCRIPTION
The Tire Pressure Indicating System has a sensor and
a transmitter for each wheel, and includes a computer:
the Tire Pressure Indicating Unit (TPIU).
The system includes:
- a sensor which measures the pressure of each
tire,
- a rotating mechanism which transmits the
electrical pressure signal from the wheel to
the wheel axle.It includes a rotating
transformer and an integrated electronic
module,
- a computer TPIU (Tire Pressure Indicating
Unit).
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TIRE PRESSURE INDICATING SYSTEM PRESENTATION
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SELF EXAMINATION
Where is the Tire Pressure Indication displayed ?
A - On a tire and brake indicator.
B - On ECAM.
C - No indication.
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32 - LANDING GEAR
32-49-00 TIRE PRESSURE INDICATING SYSTEM
DESCRIPTION/OPERATION
CONTENTS:
Purpose
Pressure Transducer
Rotating Mechanism
Electronic Module
Rotating Transformer
Detection Unit
Interfaces
Self Examination
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TIRE PRESSURE INDICATING SYSTEM DESCRIPTION/OPERATION
PURPOSE
The Tire Pressure Indicating System (TPIS)
continuously monitors the absolute pressure of each
individual tire and provides cockpit indications and
warnings.
PRESSURE TRANSDUCER
A pressure transducer installed in the wheel rim
measures the pressure of each tire.
The pressure transducer gives a DC signal from 0 to
100mV in proportion to the pressure.
ROTATING MECHANISM
The rotaring mechanism serves to transmit the tire
pressure signal from the wheel to the axle.
The rotating transformer also provides the necessary
power supply for the electronic module and the pressure
transducer in form of a 3125Hz signal.
ELECTRONIC MODULE
The integrated electronic module amplifies the signal
from the pressure transducer and changes the voltage
into frequency by means of a converter.
The voltage to frequency converter gives a signal which
varies from 50 to 100kHz for a pressure range from 0
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