# Use Cases

Tilting Systems


Problem We Solve

Tilt Measurement Principle

An inclinometer uses the effect of Earth’s gravity (1g) on the seismic mass as an input acceleration to determine the angle of inclination (tilt). The inertial mass is the center wafer, supporting the proof mass through the spring. The accelerometer’s output signal (Vout) is a ratiometric analog voltage which is determined by the sum between Bias and the product of Scale factor and Acceleration, where the Bias is the output voltage at 0g acceleration, the Scale factor is the sensor sensitivity and the Acceleration is the Earth’s pull (1g) applied through the sensitive axis.

MEMS Accelerometers for Tilt

In order to ensure accelerometers’ ultra-high precision Safran’s MEMS expertise addresses three questions: a highly stable MEMS sensing element, an excellent assembly and packaging technology and high quality electronics. Thanks to this expertise Safran’s MEMS accelerometers have an inherent high resolution and a very repeatable bias behavior – the fundamental characteristics for tilt sensing applications.

Why it is Important

High speed train tilt control systems are aimed to increase the operational speed of the trains on curving rail lines. The predictive tilt control system will tilt the train in accordance with the calculated inclination angle and thus will decrease the angular velocity of the roll. Minimizing roll angular velocity means better passenger ride control and shortening travel times. Train tilt control systems require accurate and reliable measurements of acceleration – gravity – for tilt calculation.  Those measurements are delivered by accelerometers of low g-range.

How We Solve it

MS1000 accelerometer in +/- 2g range integrated into the sensor block of train tilting system, will ensure very accurate and reliable tilt angle readings. MS1000 long term bias repeatability performance (0.24 mg for +/2 g, typ) will ensure tilt system long lifecycle without recalibration. Accelerometers’ inherent high resolution (@1Hz 7 µg rms for.+/- 2g typ.,) will allow of tilt measurements of a very small angle.

Why Choose Us

  • The MS1000 is designed to withstand extreme forces of acceleration equivalent to many times the force of gravity.
  • The built-in self-test mode generates a square wave signal on the device outputs (OUTP & OUTN) and can be used for device failure detection. This can be helpful to prevent system faults before they occur.
  • The high quality sensor design of our MEMS Accelerometer products support test engineers around the world quickly and flexibly to ensure safety and reliability of vehicles, equipment and buildings.

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