Abstract: A monitoring device (10) for monitoring movement characteristics of an item with which the monitoring device is associated, the monitoring device comprising: a transducer (15) operable to generate an electrical signal in response to movement of the item; an electrical store (18) operable to store energy on receipt of an electrical signal from the transducer (15); a radio-frequency identification device (12, 13, 14) having a data recorder (14) operable to record data on receipt of an electrical signal from the transducer (15), and a radio-frequency signal transmitter (12,13) operable to transmit a radio-frequency signal indicative of data recorded by said data recorder; and an electrical signal splitter operable to split an electrical signal generated by the transducer into a first portion and a second portion, and to provide said first portion to said electrical store and said second portion to said radio-frequency identification device.

Abstract: A monitoring device (10) for monitoring movement characteristics of an item with which the monitoring device is associated, the monitoring device comprising: a transducer (15) operable to generate an electrical signal in response to movement of the item; an electrical store (18) operable to store energy on receipt of an electrical signal from the transducer (15); a radio-frequency identification device (12, 13, 14) having a data recorder (14) operable to record data on receipt of an electrical signal from the transducer (15), and a radio-frequency signal transmitter (12,13) operable to transmit a radio-frequency signal indicative of data recorded by said data recorder; and an electrical signal splitter operable to split an electrical signal generated by the transducer into a first portion and a second portion, and to provide said first portion to said electrical store and said second portion to said radio-frequency identification device.

Abstract: Apparatus for generating a threshold value indicative of a status change, comprising a trend projection engine for processing a plurality of sensed values in an order of value size to generate a corresponding predicted value for each of the plurality of sensed values, by reference to a value sequence trend of the plurality of sensed values, a comparator for comparing one or more of the plurality of sensed values against their corresponding predicted values to identify an abnormal sensed value which differs from its corresponding predicted value by a pre-specified amount, and a threshold generator for using the abnormal sensed value to identify the threshold value.