Patent ID: 9671296
Date: 2017-06-06
CPC Classifications: G01D,G01K,H04M

Claim:
1. A portable electronic device comprising an integrated temperature sensor for measuring an ambient temperature, a compensator for reducing a difference between an output of the temperature sensor and the ambient temperature, wherein the compensator switches depending on environmental and/or handling conditions between a plurality of compensation modes selected dependent on measurements of one or more integrated and/or external sensors, wherein the compensator is a heat compensator compensating for internal heat flows to and from the temperature sensor and/or a dynamic compensator compensating for the response function of the temperature sensor, wherein, for the heat compensator, the ambient temperature is estimated by using the following equations [1] as heat compensator: with u(k) denoting inputs at time step k including the output of the temperature sensor as input of the heat compensator, y(k) denoting the estimated ambient temperature as output of the heat compensator, and x(k) denoting an internal state vector of the heat compensator, with the plurality of compensation modes realized by using different values of the internal state vector x(k) and/or by using different values of matrices A, B, C and D, and wherein, for the dynamic compensator, the following equations [2] are used: with u(k) denoting inputs at time step k including the output of the temperature sensor as input of the heat compensator, y(k) denoting the estimated ambient temperature as output of the heat compensator, and x(k) denoting an internal state vector of the heat compensator, with the plurality of compensation modes realized by using different values of the internal state vector x(k) and/or by using different values of the matrices A, B, C and D.