WIRELESS LIGHTING CONTROL SYSTEMS AND METHODS
First Claim
1. A device for a wireless device control system, the device powered by an AC supply, the device comprising:
- a zero-cross detection circuit coupled to the AC supply, the zero-cross detection circuit including a timer having a preset time, the timer reset by a zero-cross detection, and the zero-cross detection circuit detecting loss of the AC supply upon the timer reaching the preset time without resetting;
a first voltage regulator including a rectifier and having an input coupled to the AC supply and an output providing a first DC supply;
a diode having a cathode and an anode, the anode coupled to the output of the first voltage regulator;
a wireless transmitter having a power input, the wireless transmitter for communicating with at least one other component of the wireless device control system; and
at least one first capacitor coupled to the cathode of the diode and to the power input of the wireless transmitting; and
wherein the at least one capacity provides energy storage sufficient to power the wireless transmitter for a duration long enough to transmit one message upon of the AC supply the cathode of the diode coupled to the at least one capacitor.
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Accused Products
Abstract
Wireless lighting control systems and methods for controlling the illumination of one or more light fixtures are disclosed. Embodiments include a server connected to a wide area network and having software for configuring, monitoring, and controlling lighting fixtures at a site. The control system also includes a wireless gateway at the site communicating with the server via cellular. Wireless devices communicate with the wireless gateway via a mesh network and each wireless device is wired to control at least one lighting fixture. A user interface can connect to the wide area network and enable a user to access server control software. Control instructions entered on the server by the user interface are communicated from the server to the wireless gateway and to the wireless devices. A user site device may be connected to the site mesh network enabling a user to configure, monitor, and control lighting fixtures at the site.
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Citations
15 Claims
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1. A device for a wireless device control system, the device powered by an AC supply, the device comprising:
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a zero-cross detection circuit coupled to the AC supply, the zero-cross detection circuit including a timer having a preset time, the timer reset by a zero-cross detection, and the zero-cross detection circuit detecting loss of the AC supply upon the timer reaching the preset time without resetting; a first voltage regulator including a rectifier and having an input coupled to the AC supply and an output providing a first DC supply; a diode having a cathode and an anode, the anode coupled to the output of the first voltage regulator; a wireless transmitter having a power input, the wireless transmitter for communicating with at least one other component of the wireless device control system; and at least one first capacitor coupled to the cathode of the diode and to the power input of the wireless transmitting; and wherein the at least one capacity provides energy storage sufficient to power the wireless transmitter for a duration long enough to transmit one message upon of the AC supply the cathode of the diode coupled to the at least one capacitor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for a gateway to monitor a device status in a wireless lighting control system, comprising:
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monitoring communication between the device and gateway; monitoring power supplied to the device; detecting power loss to the device; powering the device after power loss with a capacitive circuit; sending a power loss message from the device to the gateway upon detection of the power loss; detecting loss of communication between the device and gateway; and determining the loss of communication was not from power loss when no power loss message was received by the gateway. - View Dependent Claims (8, 9, 10)
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11. A wireless lighting control system, comprising:
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a server connected to a wide area network and having control software for configuring, monitoring, and controlling lighting devices at a site; a wireless gateway located at the site and including a cellular modem to communicate with the server via a cellular network and a communications module to communicate with the lighting devices via a wireless mesh network; and
,a plurality of wireless devices having a radio module to communicate with the wireless gateway via the wireless mesh network, and at least one of the plurality of wireless devices including an output module to control a light fixture and including a preset emergency action for the light fixture in the event of a loss of communications with the gateway; and
,wherein one of the plurality of wireless devices periodically determines whether communication with the gateway has been lost and upon detecting loss of communication, the one of the plurality of wireless devices selecting the preset emergency action. - View Dependent Claims (12, 13, 14, 15)
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Specification