Cash till load cell

摘要

A cash till having a drawer (2) with a plurality of compartments (4) for storing coins, notes or vouchers. Each compartment (4) has an associated load cell (6), which produces a signal that is proportional to the weight of the compartment contents. The signal is provided to a monitoring apparatus (10) that takes readings from the load cell (6) while the till drawer (2) is closed. If a preceding reading is within a threshold amount of the current reading, then the preceding reading is stored as a verified value. The method removes jitter and drift in the signals produced by the load cells (6) of the cash till.

主权项

1. A method of reading data from a load cell of a cash till, comprising:
taking a plurality of readings successively from the load cell; comparing a given reading with a subsequently taken reading; storing the given reading in memory as a verified value if the subsequently taken reading differs by less than a predetermined amount from the given reading; continuing to take successive readings from the load cell and to perform comparisons until a predetermined number of verified values has been stored in memory; calculating an average value for the predetermined number of verified values; and storing the average value in memory.