Fault detection system
AssigneePhilips Lighting Holding B.V.
InventorsROHIT KUMAR, MAULIN DAHYABHAI PATEL
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Abstract
A fault detection system (100) for detecting faulty devices among a first plurality of serviceable devices (200) is provided. The serviceable devices have a wireless transmitter (210) arranged to periodically transmit a wireless signal (230) that encodes a device identifier. Mobile devices have a receiver (310) arranged to receive the wireless signal of a serviceable device within the transmission range, and to obtain the device identifier from the wireless signal. A fault detector (400) is arranged to detect faulty devices by selecting device identifiers in the plurality of device identifiers for which no device identifier was received in a time period.
Claims16
A fault detection system for detecting faulty devices among a first plurality of serviceable devices, the serviceable devices comprising a light source arranged for illuminating a surrounding area of the light source, the first plurality of serviceable devices being distributed across a geographic area, the system comprising:
- the first plurality of serviceable devices, a serviceable device of the first plurality of serviceable devices comprising a wireless transmitter arranged to periodically transmit a wireless signal, the wireless signal being receivable in a transmission range surrounding the serviceable device, the wireless signal encoding information, the information comprising at least a device identifier corresponding to the serviceable device uniquely identifying the serviceable device within the first plurality of serviceable devices, the wireless signal being light emitted by the light source modulated by the wireless transmitter to encode the information,
- a second plurality of mobile devices, a mobile device of the second plurality of mobile devices comprising:
- a receiver comprising a light source arranged to receive the wireless signal of a serviceable device within the transmission range, and to obtain the device identifier from the wireless signal, and
- a local storage unit for storing a list of received device identifiers, the receiver being arranged to add a device identifier received by the receiver to the list,
- a computer network sender arranged to send the list of device identifiers to a fault detector, and
- the fault detector arranged to detect faulty devices, the fault detector comprising:
- a computer network receiver arranged to receive multiple lists from multiple mobile devices of the second plurality of mobile devices,
- a database storing a plurality of device identifiers of the first plurality of serviceable devices,
- a fault detection unit arranged to select device identifiers in the plurality of device identifiers for which no device identifier was received in a time period.
A mobile device for use in a fault detection system according to anyone of the preceding claims, the mobile device comprising:
- a receiver comprising a light sensor arranged to receive the wireless signal of a serviceable device within a transmission range, and to obtain the device identifier from the wireless signal, the wireless signal being light modulated to encode the information, and
- a local storage unit for storing a list of received device identifiers, the receiver being arranged to add a device identifier received by the receiver to the list.
A fault detection method for detecting faulty devices among a first plurality of serviceable devices, the first plurality of serviceable devices being distributed across a geographic area, the method comprising
- periodically transmitting a wireless signal by serviceable devices in the first plurality, the wireless signal being receivable in a transmission range surrounding the serviceable device, the serviceable devices comprising a light source, the light source being arranged for illuminating a surrounding area of the light source, the wireless signal being light emitted by the light source modulated by the wireless transmitter to encode the information,
- encoding information in the wireless signal, the information comprising at least a device identifier uniquely identifying the serviceable device within the first plurality of serviceable devices,
- receiving by a light sensor the wireless signal of a serviceable device within the transmission range by a mobile device,
- obtaining the device identifier from the wireless signal,
- adding a device identifier received by the receiver to a list and storing the list of device identifiers received,
- detecting faulty devices, including:
- storing a plurality of device identifiers of the first plurality of serviceable devices,
- selecting device identifiers in the plurality of device identifiers for which no device identifier was received in the time period.
Dependencies are inferred from the claim text.