Wireless power transmission system and method with increased safety against radiation exposure

1. A wireless power transmission system for transmitting power to energy receiving equipment, the system comprising:

an intruder alarm, wherein the intruder alarm comprises a detection system that is arranged to trigger the intruder alarm when the intruder alarm is set and the detection system is activated;

a power source for wirelessly transmitting high power packets and low power packets;

and

energy receiving equipment for receiving the high power packets and low power packets from the power source,

wherein the system is arranged such that the power source can only transmit high power packets when the intruder alarm is set and not triggered.

2. The wireless power transmission system of claim 1 , wherein the system is arranged such that the power source can transmit low power packets when the intruder alarm is set and triggered and/or when the intruder alarm is off.

3. The wireless power transmission system of claim 1 , wherein the person detection system comprises one or more detectors arranged to detect a person in a predetermined space in order to trigger the intruder alarm, wherein the detectors are arranged to be powered by receiving low and high power packets at the energy receiving equipment.

4. The wireless power transmission system of claim 1 , wherein the power source is a Wi-Fi router.

5. The wireless power transmission system of claim 1 , wherein the detection system monitors a predetermined space, the low power packets are of a first predetermined power level and the high power packets are of a second predetermined power level, and wherein the first predetermined power level is below a predetermined maximum safe power level for human exposure inside of the predetermined space.

6. The wireless power transmission system of claim 5 , wherein the second predetermined power level is below a second predetermined maximum safe power level for human exposure outside of the predetermined space.

7. The wireless power transmission system of claim 1 , comprising a power monitor for monitoring the power required by one or more devices powered by the wireless transmission system, wherein the system is configured to only send power packets when it is determined that they are required by the devices based on the monitored required power.

8. The wireless power transmission system of claim 7 , wherein the system is arranged to send high power packets only when high power packets are required by one or more of the devices.

9. The wireless power transmission system of claim 1 , wherein all of the components of the intruder alarm are powered wirelessly by the power source.

10. The wireless power transmission system of claim 1 , wherein other devices are powered in addition to the intruder alarm.

11. A method of transmitting wireless power, the method comprising:

providing an intruder alarm for monitoring a predetermined area for the presence of a person, wherein the intruder alarm is triggered when the intruder alarm is set and a detection system of the intruder alarm is activated;

providing a power source for wirelessly transmitting power to energy receiving equipment, wherein the power source is configured to transmit high power packets and low power packets; and

transmitting high power packets only if the intruder alarm is set and not triggered.

12. The method of claim 11 , comprising transmitting low power packets if the intruder alarm is set and triggered and/or if the intruder alarm is off.

13. The method of claim 11 , comprising monitoring the power requirement of one or more devices powered by the power source, determining power is required and sending a power request to the power source in order to transmit power.

14. The method of claim 13 , comprising determining if low power or high power packets are required by one or more of the devices based on the monitored power requirement and transmitting high power packets only if high power packets are required.

15. The method of claim 11 , wherein the method comprises retrofitting power receiving equipment to an existing intruder alarm, retrofitting power transmitting equipment to an existing Wi-Fi router such that the Wi-Fi router acts as the power source and/or retrofitting a controller arranged to control the power transmission from the power source based at least partly on whether or not the intruder alarm has been triggered.