Description IPV

IPV3 universal accelerometers (hereafter measuring instrument) are designed to measure acceleration and vibration that influence aircraft on land and in flight. The measuring instrument can be installed in different sections in aircraft, both airtight and non tight. The measuring instrument provides acceleration measurement in installation areas in 3 orthogonal directions and provides their transformation into electric signals.

IPV general description

IPV3 acceleration-measuring and vibration instruments (hereafter measuring instrument) are designed to measure acceleration and vibration that influence aircraft on land and in flight. The measuring instrument can be installed in different sections in aircraft, both airtight and non tight. The measuring instrument provides acceleration measurement in installation areas in 3 orthogonal directions and provides their transformation into electric signals.

Simultaneous measurement of acceleration at 3 orthogonal axises is a distinctive feature of sensors.

The accelerometer senses constant and varying accelerations and converts them to a preliminary electric signal. Then the preliminary signal passes through a filtration unit where required part of original signal spectrum evolves and then scales to a necessary level. Pendulous accelerometer is used as a sensing element of the transducer (sensor). It is a condenser with pendulum swinging between its armatures. Pendulum oscillation frequency is proportional to effective acceleration. When the pendulum swings, capacitor capacity is changed. It can be measured and converted to an electric signal.

At the transducer output there is a constant amplifier based on operational amplifier which increases output amplitude to 0.2 – 4.8 V. The accelerometer is powered from stabilized power supply unit generating voltage of 2.5 and 5 V. It is based on a voltage converter which galvanically isolates transducer circuits from aircraft power supply system.