Patent ID: 9587941
Date: 2017-03-07
CPC Classifications: G01C,G08B

Claim:
1. A method of enhancing the detectability of a height change with an air pressure sensor, the air pressure sensor providing a height measurement, the height measurement including a measurement error depending on the orientation of the pressure sensor relative to the direction of gravity, the air pressure sensor being included in a sensor unit, the sensor unit being attachable to a person, the method comprising the steps of determining a preferred orientation of the pressure sensor relative to the direction of gravity in which it provides a largest height measurement; determining a reference orientation of the sensor unit without the pressure sensor installed therein and relative to the direction of gravity wherein said reference orientation corresponds to the orientation of the sensor unit when attached to the person while the person has a predetermined posture; determining a relative orientation of the pressure sensor, the relative orientation corresponding to the orientation of the pressure sensor relative to the orientation of the sensor unit wherein the pressure sensor has the preferred orientation while the sensor unit has the reference orientation; mounting the pressure sensor in the relative orientation relative to the orientation of the sensor unit.