Method and apparatus for determining a probability of a presence of a movement of interest of a bike

An apparatus for determining a probability of a presence of a movement of interest of a bike, comprising:

• a signal processing unit configured to:
• sense a first indicator value indicating a degree of a first movement of the bike or a probability of a presence of a specific first movement of the bike,
• sense a second indicator value indicating a degree of a second movement of the bike or a probability of a presence of a specific second movement of the bike,
• calculate a first change value from the first indicator value by way of a first mapping function, wherein, by way of the first mapping function, various possible values of the first indicator value are respectively associated with a first change value,
• calculate a second change value from the second indicator value by way of a second mapping function, wherein, by way of the second mapping function, various possible values of the second indicator value are respectively associated with a second change value, and
• adjust a first probability, which is a probability of a presence of a movement of interest, wherein the first probability is incremented or decremented depending on the first change value and the second change value,
• wherein the movement of interest is associated with a possible theft of the bike, and
• wherein the signal processing unit uses the first probability to determine when the movement of interest has occurred and when the movement of interest is no longer occurring.