# US 11,445,589 B2 · Method and system for asset localization, performance assessment, and fault detection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,589 B2 - Document ID: US11445589B2 - Status: Granted - Kind: B2 - Application number: 16/624,329 - Filed: 2018-06-18 - Published: 2020-04-23 - Granted: 2022-09-13 - Earliest claimed: 2017-06-27 - Assignees: Signify Holding B.V. - Applicants: Signify Holding B.V. - Inventors: Yuting Zhang; Dong Han; Sirisha Rangavajhala; Talmai Brandão De Oliveira - Web page: https://patentgrep.com/patent/US11445589B2 ## CPC - G06F 16/245: Query processing - H05B 47/20: Responsive to malfunctions or to light source life; for protection - G01J 1/0228: {Control of working procedures; Failure detection; Spectral bandwidth calculation} - G01J 1/44: Electric circuits {(for command of an exposure part G03B7/02)} - G06F 30/13: Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads - G06F 30/27: using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model - H05B 45/50: responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits - G01J 2001/4247: {for testing lamps or other light sources} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) ## Abstract A method (400) for analyzing output of lighting units (10) in a lighting system (100) includes the steps of: (i) simulating (430), based on data from a photometric database (310), the output of a lighting unit; (ii) receiving and storing (420), from a database (330) of historical information, historical observed data about the output of the lighting unit; (iii) receiving (450) observed data (36) about the output of the lighting unit; (iv) generating (440) a model of the lighting system based at least in part on the simulated output of the lighting unit and the historical observed data about the output of the lighting unit, wherein the model comprises localization information for the lighting unit; and (v) comparing (470) the received observed data about the output of the lighting unit to the generated model, wherein a fault is detected if the observed data varies from the generated model by a predetermined amount. ## Claims ### Claim 1 A method for analyzing output of one or more lighting units in a lighting system for fault detection, the method comprising the steps of: simulating, based on data from a photometric database, the output of a lighting unit; receiving, from a database of historical information, historical observed data about the output of the lighting unit, the historical observed data comprising illuminance data; receiving observed data about the output of the lighting unit; generating a model of the lighting system based at least in part on the simulated output of the lighting unit and the historical observed data about the output of the lighting unit, wherein the model comprises localization information for the lighting unit; and comparing the received observed data about the output of the lighting unit to the generated model, wherein a fault is detected if the received observed data varies from the generated model by a predetermined amount. ### Claim 2 (depends on 1) The method of claim 1, further comprising the step of notifying a user that a fault is detected. ### Claim 3 (depends on 1) The method of claim 1, further comprising the step of storing, only if no fault is detected, the received observed data about the output of the lighting unit in the database of historical output information. ### Claim 4 (depends on 1) The method of claim 1, wherein the predetermined amount is based on a lighting standard, a luminaire specification, and/or a service level agreement. ### Claim 5 (depends on 1) The method of claim 1, wherein the data stored in the photometric database comprises photometric information about one or more of the lighting units. ### Claim 6 (depends on 1) The method of claim 1, wherein the model of the lighting system comprises topographical information about the lighting environment. ### Claim 7 (depends on 1) The method of claim 1, wherein the model of the lighting system comprises geolocation information about one or more of the lighting units. ### Claim 8 (depends on 1) The method of claim 1, further comprising the step of enhancing, using the generated model, the receiving observed data. ### Claim 9 (depends on 1) The method of claim 1, wherein the generated model comprises a weight for each of the one or more lighting units, and wherein the received observed data comprises a weight for each of the one or more lighting units, wherein the step of comparing the received observed data to the generated model comprises comparing the model weight to the observed weight. ### Claim 10 A system, configured to analyze the output of one or more lighting units, in a lighting system for fault detection, the system comprising: a historical database comprising historical observed data about the output of the one or more lighting units, the historical observed data comprising illuminance data; a photometric database comprising photometric information about the one or more lighting units; a simulation module configured to simulate, based on the data from the photometric database, the output of the one or more lighting units; a training module configured to generate a model of the lighting system based at least in part on the simulated output of the one or more lighting units and the historical observed data about the output of the one or more lighting units, wherein the model comprises localization information for the one or more lighting units; and an assessment module configured to compare received observed data to the generated model, wherein a fault is detected if the received observed data for one or more of the lighting units varies from the generated model for that lighting unit by a predetermined amount. ### Claim 11 (depends on 10) The system of claim 10, further comprising a user interface configured to provide information to a user about a detected fault. ### Claim 12 (depends on 10) The system of claim 10, further comprising an enhancement module configured to enhance, using the generated model, the receiving observed data. ### Claim 13 (depends on 10) The system of claim 10, wherein the generated model comprises a weight for each of the one or more lighting units, and wherein the received observed data comprises a weight for each of the one or more lighting units, wherein the assessment module is configured to compare the model weight to the observed weight. ### Claim 14 (depends on 10) The system of claim 10, wherein the predetermined amount is based on a lighting standard, a luminaire specification, and/or a service level agreement. ### Claim 15 (depends on 10) The system of claim 10, wherein the model of the lighting system comprises topographical information about the lighting environment.