Power management scheme for vibration harvester sensor

A system for managing sensor power to a remote wireless condition monitoring sensor installed on a railway rolling stock, the system comprising:

• an energy harvester that derives the sensor power,
• a rechargeable battery connected to the energy harvester for supplying energy to the rechargeable battery and for powering the system,
• an antenna for sending signals to a remote database based on a measured vibration and acceleration data,
• a central processing unit having a memory, an arithmetic logic unit and a control unit for controlling a function of the system, wherein
• the remote wireless condition monitoring sensor is protected from an over voltage condition and an under voltage condition and an operating life is prolonged by entering dedicated modes of operation based on a battery voltage and an available energy capacity as instructed by the central processing unit,
• energy capacity thresholds for the rechargeable battery are configured in the memory, and
• the available energy capacity is calculated by the arithmetic logic unit based on a measured voltage and a temperature of the rechargeable battery, wherein
• the remote condition monitoring device is configured with at least five different power modes that are enterable based on the calculated available energy capacity of an internal rechargeable battery and/or specific events detailed, wherein
• an irreversible damage is avoided by insuring that the battery is not discharged below a threshold level.