Piece of furniture, a method of calibrating an actuator and a method of adjusting a component of a piece of furniture

A method for calibrating an actuator in a piece of furniture, the actuator comprising a first and at least one second actuator for adjusting a component of said piece of furniture, a controller for controlling the first and the at least one second actuator, and a non-volatile memory, wherein the first and the at least one second actuator each comprise a first element and a second element, which are displaceable relative to each other, and a time-of-flight sensor mounted on the first element and adapted to measure a distance between the first and the second element based on a time-of-flight measurement of a wave, and wherein the controller is configured to determine an absolute position of each of the first and the at least one second actuator from the respective measured distance and to determine the respective absolute positions of the first and the at least one second actuator via an interpolation between at least two calibrated individual values on the basis of the respective measured distance, the method comprising:

• controlling the actuator to a first defined position corresponding to a first position value;
• measuring a first distance between the first and the second element in the first defined position;
• storing the first position value together with the associated first distance in the memory;
• controlling the actuator to a second defined position corresponding to a second position value;
• measuring a second distance between the first and the second element in the second defined position;
• and
• storing the second position value together with the associated second distance in the memory.

A method for adjusting a component of a piece of furniture, wherein said piece of furniture comprises a first and at least one second actuator for adjusting the component of said piece of furniture, and a controller for controlling the first and the at least one second actuator, wherein the first and the at least one second actuator each comprise a first element and a second element, which are displaceable relative to each other, and a time-of-flight sensor mounted on the first element and adapted to measure a distance between the first and the second element based on a time-of-flight measurement of a wave, and wherein the controller is configured to determine an absolute position of each of the first and the at least one second actuator from the respective measured distance, the method comprising:

• determining a joint target speed curve for the adjustment operation based on a target position and a current position of the first and the at least one second actuator;
• determining a joint target position curve for a plurality of points in time of the adjustment operation based on the target speed curve;
• initial setting of a respective speed of the first and the at least one second actuator;
• iteratively comparing a respective momentary position of the first and the at least one second actuators with an associated position value of the target position curve in order to generate a comparison result;
• and
• adjusting the respective speeds of the first and the at least one second actuator based on the respective comparison result.