A monitoring system for a conveyance system, comprising:a pressure sensor mounted on a conveyance apparatus; an accelerometer mounted on the conveyance apparatus; and a controller arranged to: acquire accelerometer data by sampling the accelerometer; store the accelerometer data in a buffer; acquire pressure sensor data by sampling the pressure sensor; determine from the pressure sensor data that a start or stop of the conveyance apparatus has occurred; and upon said determination, analyse the accelerometer data to determine a first position within the accelerometer data, wherein the first position is a position at which the start or stop of the conveyance apparatus occurred. Both pressure and acceleration readings are combined to determine a point in time at which motion started or stopped. The pressure sensor is used first to determine a robust indication that the motion state has changed (started or stopped). Upon making that determination, the accelerometer data is then analysed to make an accurate determination of when the motion state changed (i.e. when the conveyance apparatus started or stopped). The processing that is required to extract an accurate start or stop time from the accelerometer data is sufficiently intensive and power consuming that it cannot be run continuously on a low power (e.g. battery powered or energy harvesting) device. However the pressure sensor detection part of the process is low powered and is used to trigger the accelerometer processing only when necessary, such that the overall detection process is energy efficient as well as accurate.
MONITORING SYSTEM FOR CONVEYANCE SYSTEM
ÜBERWACHUNGSSYSTEM FÜR EIN FÖRDERSYSTEM
SYSTÈME DE SURVEILLANCE POUR UNE INSTALLATION DE TRANSPORT
2022-04-20
Patent
Elektronische Ressource
Englisch
IPC: | B66B Aufzüge , ELEVATORS |
Conveyance system and conveyance method of conveyance system
Europäisches Patentamt | 2018
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