Patent ID: 9672731
Date: 2017-06-06
CPC Classifications: G08B,G08C,H04Q

Claim:
1. A sensor monitoring system comprising at least one sensor and a processing unit comprising a buffer, wherein the sensor transmits data items autonomously, each of the data items comprising at least one sensor value, and is arranged to transmit during a plurality of successive time periods data items to the processing unit and the processing unit is arranged to receive the data items from the said at least one sensor and the buffer is arranged to buffer an amount of data items, the processing unit being further arranged for: determining for two or more time periods from the said plurality of successive time periods a number of corresponding data items received during an expected waiting time; detecting a duration (Delta) between the successive transmissions of the data items; setting the expected waiting time for determining the number of data items based on the detected duration and the amount of data items the buffer is arranged to buffer; comparing between the two or more time periods the number of the corresponding data items; and deducing for the two or more time periods a measure of change in the number of data items per said two or more time periods.