# US 2018/0322649 A1 · Automatic light position detection system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0322649 A1 - Document ID: US20180322649A1 - Status: Published application - Kind: A1 - Application number: 15/584,639 - Filed: 2017-05-02 - Published: 2018-11-08 - Earliest claimed: 2017-05-02 - Assignees: Jdrf Electromag Engineering Inc. - Applicants: JDRF Electromag Engineering Inc. - Inventors: Roumanos Dableh - Web page: https://patentgrep.com/patent/US20180322649A1 ## CPC - G01B 11/002: {for measuring two or more coordinates} - G06T 7/60: Analysis of geometric attributes - F21V 17/02: with provision for adjustment (F21V17/04 - F21V17/08 take precedence) - G01B 11/00: Measuring arrangements characterised by the use of optical techniques - G02B 26/0816: {by means of one or more reflecting elements} - G03B 21/00: Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) - G05B 19/19: characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path - G05B 19/402: characterised by control arrangements for positioning, e.g. centring a tool relative to a hole in the workpiece, additional detection means to correct position (G05B19/19 takes precedence) - H04B 7/24: for communication between two or more posts (wireless communication networks H04W) - H05B 47/195: the transmission using visible or infrared light - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - H04B: TRANSMISSION - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract A device that is capable of determining its relative position with regard to another device. The device accomplishes this by receiving and analyzing two sets of information emitted by the device whose unique identifier and relative position is to be determined. The first set of information received by the device includes a structured light pattern with a known geometric configuration reflected off a surface in view of both devices. The second set of information received by the device includes a digital communication signal that encodes the unique identifier of the emitting device. Both sets of information may be transmitted on a free space optical communication channel that can be non-directed and non-line of sight. ## Claims ### Claim 1 A positioning electronic device comprising: a projector for projecting a structured light pattern on a reflective surface; an image sensor for detecting all or part of one or more reflected structured light patterns projected using the projector of a second positioning electronic device; a communications transceiver for transmitting and receiving communication signals to one or more other positioning electronic devices, a control logic processor for determining the relative position of the positioning electronic device relative to the second positioning electronic devices using the detected reflected structured light patterns; and communicating the relative position using the communications transceiver. ### Claim 2 (depends on 1) The electronic device of claim 1 further comprising, a distance detector for detecting the distance from the electronic device to the reflecting surface on which the projector may project the structured light pattern and the image sensor may detect the one or more reflected structured light pattern. ### Claim 3 (depends on 1) The electronic device of claim 1 wherein only one neighbouring device projects a structured light pattern and an identifier of the electronic device is received at the communication transceiver so that the controller can identify the electronic device projecting the structured light pattern detected by the image sensor. ### Claim 4 (depends on 1) The electronic device of claim 1 wherein the communications transceiver is an infrared transceiver. ### Claim 5 (depends on 1) The electronic device of claim 1, wherein the structured light pattern is a pattern known to the receiving device and wherein the control logic processor calculates the relative position using the expected appearance of the reflected structured light pattern and the actual appearance from the image sensor. ### Claim 6 (depends on 1) The electronic device of claim 1, wherein the image sensor detects a unique identifier in the detected structured light pattern projected by an electronic device, the unique identifying, identifying the electronic device projecting the structured light pattern. ### Claim 7 (depends on 1) The electronic device of claim 1 wherein the control logic processor communicates the relative positions of one or more electronic devices to a central controller. ### Claim 8 (depends on 1) The electronic device of claim 1 wherein the electronic device is a light fixture. ### Claim 9 A method of determining the relative position of a first and second electronic devices comprising: a first device projecting a structured light pattern on a reflective surface; a second device detecting all or part of the projected structured light using an image sensor; determining which portion of the structured light pattern was detected at the second device and the relative position of the first device and the second device; communicating the relative position from the second device to the first device. ### Claim 10 (depends on 9) The method of claim 9, wherein the first and second electronic devices are light fixtures mounted to a ceiling. ### Claim 11 (depends on 9) The method of claim 9, wherein the first and second electronic devices further comprise a distance detector for detecting the distance from the electronic device to the reflecting surface on which the projector may project the structured light pattern and the image sensor may detect the one or more reflected structured light pattern. ### Claim 12 (depends on 9) The method of claim 9 further comprising the second device projecting a structured light pattern on a reflective surface, the first device detecting all or part of the projected structured light using an image sensor, determining which portion of the structured light pattern was detected at the second device and the relative position of the first device and the second device, and communicating the relative position from the first device to the second device and reconciling the relative positions of the two devices. ### Claim 13 (depends on 12) The method of claim 12 further comprising additional electronic devices projecting and detecting structured light patterns, determining which portion of the structured light patterns was detected and the relative positions of the devices, and communicating the relative positions to the other electronic devices. ### Claim 14 (depends on 12) The method of claim 12 wherein only one device projects a structured light pattern and communicates an identifier of the electronic device to the other electronic devices so the other electronic devices can identify which device is projecting the structured light. ### Claim 15 (depends on 9) The method of claim 9, where the communicating uses an infrared transceiver. ### Claim 16 (depends on 9) The method of claim 9, wherein the structured light pattern is a pattern known to the receiving device and wherein determining the relative position uses the expected appearance of the reflected structured light pattern and the actual appearance from the image sensor. ### Claim 17 (depends on 9) The method of claim 9 wherein the relative position of the electronic devices is further communicated to a central controller.