Abstract: The invention relates to an algorithm for detecting activation of a tactile pressure sensor having a mechanic structure that includes the steps of: (a) measuring periodically an input quantity (V0; f0) of the sensor, when it is not pressed, the period being set according to sensor dynamic requirements; (b) computing a current idle quantity (Vidle; fidle) depending on the input quantity (V0; f0) measured at step a); (c) computing an activation threshold (?VP; ?fP) based on a quantity characterization of the sensor mechanic structure and depending on the idle quantity (Vidle; fidle) defined at step b); (d) comparing the sensor input quantity (V0; f0) with the last defined idle quantity (Vidle; fidle) increased by the activation threshold (?VP; ?fP) computed in step c) in order to determine whether the sensor is pressed or not.

Abstract: The invention relates to a process for determining the activation of at least one key of a multi-key device. The multi-key device comprises a plurality of keys K1 to Kn and a plurality of force sensors C1 to Cn, each force sensor C1 to Cn being associated respectively with a key K1 to Kn and able to provide a value representing a force which is applied to it. The process is characterized by the fact that it comprises the steps: obtaining values F?1 to F?n representing the force applied to each of the force sensors C1 to Cn; providing transmission rate values of a pressing force between the keys; removing the contribution of each of the force values F?1 to F?n from the pressing force transmitted between the keys using the transmission rate values provided; and determining values F1 to Fn representing the pressing force which has been applied by the user to the keys K1 to Kn.

Abstract: The invention relates to a process for determining the activation of at least one key of a multi-key device. The multi-key device comprises a plurality of keys K1 to Kn and a plurality of force sensors C1 to Cn, each force sensor C1 to Cn being associated respectively with a key K1 to Kn and able to provide a value representing a force which is applied to it. The process is characterised by the fact that it comprises the steps: obtaining values F?1 to F?n representing the force applied to each of the force sensors C1 to Cn; providing transmission rate values of a pressing force between the keys; removing the contribution of each of the force values F?1 to F?n from the pressing force transmitted between the keys using the transmission rate values provided; and determining values F1 to Fn representing the pressing force which has been applied by the user to the keys K1 to Kn.

Abstract: The invention relates to an algorithm for detecting activation of a tactile pressure sensor having a mechanic structure that includes the steps of: (a) measuring periodically an input quantity (V0; f0) of the sensor, when it is not pressed, the period being set according to sensor dynamic requirements; (b) computing a current idle quantity (Vidle; fidle) depending on the input quantity (V0; f0) measured at step a); (c) computing an activation threshold (?VP; ?fP) based on a quantity characterization of the sensor mechanic structure and depending on the idle quantity (Vidle; fidle) defined at step b); (d) comparing the sensor input quantity (V0; f0) with the last defined idle quantity (Vidle; fidle) increased by the activation threshold (?VP; ?fP) computed in step c) in order to determine whether the sensor is pressed or not.