A method of controlling a banknote store comprising at least one winding means and at least one elongate support means which can be wound and/or unwound from the winding means for storing and/or transporting a banknote, comprises determining the radius or diameter of a spool comprising at least the winding means using the degree of rotation of the winding means and the corresponding linear amount of movement of the elongate support means.
1. A machine-implemented method of controlling a banknote store comprising at least one winding means and at least one elongate support means which can be wound or unwound from the winding means for storing or transporting a banknote, the method comprising sensing indicia on the at least one elongate support means to determine an amount of movement of the at least one elongate support means, monitoring the radius or diameter of a spool comprising at least the winding means; comparing the radius or diameter of the spool with a threshold and determining based on the comparison whether additional banknotes can be stored in the spool.
2. The method of claim 1 further comprising using the radius or diameter of the spool to determine a preferred maximum or minimum capacity of the store.
3. The method of claim 1 comprising controlling addition or removal of banknotes based on the radius or diameter of the spool.
4. A machine-implemented method of monitoring a banknote store comprising at least one winding means and at least one elongate support means which can be wound or unwound from the winding means for storing or transporting a banknote, the method comprising sensing indicia on the at least one elongate support means to determine an amount of movement of the at least one elongate support means, determining a diameter of a spool; comparing the diameter of the spool at different times; and determining whether banknotes have been removed from the banknote store based on the comparison.
5. The method of claim 4 comprising comparing the diameter of the spool when the banknote store is powered down and powered up.
6. The method of claim 4 comprising outputting a signal if one or more banknotes have been removed.
7. The method of claim 4 wherein determining whether banknotes have been removed from the banknote store comprises calculating a difference between the diameter of the spool at the different times and comparing the difference with a threshold.
8. A machine-implemented method of estimating a capacity of a banknote store comprising at least one winding means and at least one elongate support means which can be wound or unwound from the winding means for storing or transporting a banknote, the method comprising:
sensing indicia on the at least one elongate support means to determine an amount of movement of the at least one elongate support means,
determining a radius or diameter of a spool in the banknote store, and
estimating a remaining capacity of the banknote store based on the radius or diameter of the spool.
9. The method of claim 8 comprising determining whether to use the store as an escrow based on the remaining capacity.
10. A banknote store comprising
a spool comprising at least one winding means;
at least one elongate support means which can be wound or unwound from the winding means for storing or transporting a banknote, the elongate support means having indicia thereon,
means for sensing said indicia for determining the amount of movement of the support means, and
means for controlling the banknote store wherein the means is configured to determine the radius or diameter of a spool using the degree of rotation of the winding means and a corresponding linear amount of movement of the elongate support means and to estimate the remaining capacity of the banknote store from the radius or diameter of the spool.
11. The banknote store of claim 10 wherein the winding means is a storage drum for storing banknotes.
12. The banknote store of claim 10 wherein the winding means is a reel for supplying or removing the support means.
13. The banknote store of claim 10 comprising a stepper motor to rotate the winding means.
14. The banknote store of claim 10 wherein said indicia are marks.
15. The banknote store of claim 10 comprising first and second winding means mounted for rotation about respective axes on first and second shafts, wherein the elongate support means can be unwound from one of the winding means onto the other of the winding means, and vice versa, such that banknotes can be supported in succession by the support member while the support means is wound around at least one of the winding means.
16. The banknote store of claim 10 comprising an angular motion sensor to determine the angular rotation.
17. The banknote store of claim 10 comprising a linear motion sensor for determining the amount of linear movement.