Systems and methods for remote utility metering and meter monitoring
View Patent ↗A system and method for generating and harvesting energy in response to the flow of water through rotating device, such as a nutating or oscillating disk. Mechanical energy from flow of water is converted into electrical energy via an energy conversion unit. For example, the power generation system may be used to power electronic and mechanical devices used in automated meter reading (AMR) systems. The power generator system may recharge a storage circuit that enables long term AMR operations without the need for battery replacement. The power generation system, in various embodiments, can provide additional power for two-way communication and other sensors such as pressure, temperature, water quality and services such as remote shut-off, event-based messaging, and water quality monitoring.
1. A method comprising:
rotating a rotating device by a flow of water;
rotating a drive magnet in response to the rotation of the rotating device, wherein the rotation of the drive magnet generates a time varying magnetic flux density;
rotating a registration magnet in response to the time varying magnetic flux density;
rotating a pair of rotors with respect to a series of coils interposed between the pair of rotors, the rotation being in response to the rotation of the registration magnet, thereby generating an alternating current (AC) in the series of coils;
converting the alternating current (AC) to a direct current (DC);
charging a first power storage device using the direct current (DC) and charging a second power storage device from the first power storage device; and
monitoring voltage levels of the first power storage device and second power storage device and causing a transfer of energy from the first power storage device to the second power storage device in the event that the voltage level of the first power storage device is above a first threshold and the voltage level of the second power storage device is below a second threshold.
2. The method of claim 1 further comprising maintaining output voltage levels within a specified range.
3. The method of claim 1 wherein the registration magnet and drive magnet are magnetically coupled.
4. The method of claim 1 wherein each rotor comprises at least one magnetic pole.
5. The method of claim 1 wherein energy is harvested and stored in response to the flow of water on the rotating device.