# US 10,309,763 B2 · Rail position measurement device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,763 B2 - Document ID: US10309763B2 - Status: Granted - Kind: B2 - Application number: 15/500,636 - Filed: 2015-03-11 - Published: 2017-08-03 - Granted: 2019-06-04 - Earliest claimed: 2014-08-07 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Hiroyuki Shiraishi; Katsuyuki Kamei; Kenichi Sugo; Mitsunobu Yoshida; Masashi Watanabe - Web page: https://patentgrep.com/patent/US10309763B2 ## CPC - G01B 11/002: {for measuring two or more coordinates} - B61L 15/0072: {On-board train data handling} - B61L 23/045: {Rail wear} - B61L 23/047: {Track or rail movements} - B61L 23/048: {Road bed changes, e.g. road bed erosion} - B61L 25/025: {Absolute localisation, e.g. providing geodetic coordinates} - E01B 35/00: Applications of measuring apparatus or devices for track-building purposes (apparatus on locomotives or cars to indicate or record bad track sections B61K9/00; measuring angles, linear dimensions, or irregularities in general G01B, G01C) - G01B 11/24: for measuring contours or curvatures - G01B 11/2518: {Projection by scanning of the object} - G01C 15/00: Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00 - B61L 23/041: {Obstacle detection} - B61L 25/021: {Measuring and recording of train speed} - B61L 25/026: {Relative localisation, e.g. using odometer} - B61L 27/53: for trackside elements or systems, e.g. trackside supervision of trackside control system conditions - B61L 2205/04: Satellite based navigation systems, e.g. global positioning system [GPS] - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - B61L: GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC (brakes or auxiliary equipment B61H, B61K; point or crossing construction E01B) - E01B: PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS (derailing or rerailing blocks on track, track brakes or retarders B61K) - G01C: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY (measuring liquid level G01F; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effects, propagation time, of radio waves, analogous arrangements using other waves G01S) ## Abstract A rail position measurement device that measures a three-dimensional position of a rail using a measurement vehicle includes: a position posture measurement device to measure a position and a posture of the measurement vehicle; and a laser scanner that is a sensor installed on the measurement vehicle so as to be capable of irradiating at least a web and a bottom of a side surface of the rail with laser light and used for measuring the three-dimensional position of the rail. ## Claims ### Claim 1 A rail position measurement device that measures a three-dimensional position of a rail using a measurement vehicle, the rail position measurement device comprising: a position posture measurement device installed on the measurement vehicle configured to measure a position and a posture of the measurement vehicle; a laser scanner that is a sensor installed on the measurement vehicle and configured to irradiate at least a web and a bottom of a side surface of the rail with laser light and used for measuring the three-dimensional position of the rail; a laser position adjustment device installed on the measurement vehicle and configured to move a position of the laser scanner in an up-down direction; and a calculator installed on the measurement vehicle and configured to calculate, based on measurement information of at least one of the laser scanner and the position posture measurement device, a position of the laser scanner such that at least the web and the bottom of the side surface of the rail are irradiated with the laser light. ### Claim 2 (depends on 1) The rail position measurement device according to claim 1, wherein the laser position adjustment device controls the position of the laser scanner on a basis of information from the calculator. ### Claim 3 (depends on 1) The rail position measurement device according to claim 1, wherein the laser scanner is installed on the laser position adjustment device. ### Claim 4 (depends on 1) The rail position measurement device according to claim 1, wherein the laser position adjustment device includes, in addition to a movable mechanism in the up-down direction, a movable mechanism in a horizontal direction orthogonal to both the up-down direction and a travelling direction of the measurement vehicle. ### Claim 5 (depends on 1) The rail position measurement device according to claim 1, comprising a base unit equipped with the position posture measurement device and the laser scanner, wherein the laser position adjustment device is an adjustment device configured to move a position of the base unit in the up-down direction. ### Claim 6 (depends on 1) The rail position measurement device according to claim 1, wherein the calculator calculates the position of the laser scanner on a basis of presence or absence of a derailment prevention guard. ### Claim 7 (depends on 1) The rail position measurement device according to claim 1, wherein the calculator is further configured to detect presence or absence of a derailment prevention guard from the measurement information obtained by the laser scanner, and, based on a detection result, calculate the position of the laser scanner. ### Claim 8 (depends on 1) The rail position measurement device according to claim 1, comprising a track database to store track data including gauge information at a track position and information on presence or absence of a derailment prevention guard along a running track, wherein the calculator calculates the position of the laser scanner on a basis of the track data and the measurement information obtained by the position posture measurement device. ### Claim 9 (depends on 3) The rail position measurement device according to claim 3, wherein the calculator calculates the position of the laser scanner on a basis of presence or absence of a derailment prevention guard. ### Claim 10 (depends on 4) The rail position measurement device according to claim 4, wherein the calculator calculates the position of the laser scanner on a basis of presence or absence of a derailment prevention guard. ### Claim 11 (depends on 5) The rail position measurement device according to claim 5, wherein the calculator calculates the position of the laser scanner on a basis of presence or absence of a derailment prevention guard. ### Claim 12 (depends on 3) The rail position measurement device according to claim 3, wherein the calculator is further configured to detect presence or absence of a derailment prevention guard from the measurement information obtained by the laser scanner, and, on a basis of a detection result, calculate the position of the laser scanner. ### Claim 13 (depends on 4) The rail position measurement device according to claim 4, wherein the calculator is further configured to detect presence or absence of a derailment prevention guard from the measurement information obtained by the laser scanner, and calculate, on a basis of a detection result, the position of the laser scanner. ### Claim 14 (depends on 5) The rail position measurement device according to claim 5, wherein the calculator is further configured to detect presence or absence of a derailment prevention guard from the measurement information obtained by the laser scanner, and to calculate, on a basis of a detection result, the position of the laser scanner. ### Claim 15 (depends on 3) The rail position measurement device according to claim 3, comprising a track database to store track data including gauge information at a track position and information on presence or absence of a derailment prevention guard along a running track, wherein the calculator calculates the position of the laser scanner on a basis of the track data and the measurement information obtained by the position posture measurement device. ### Claim 16 (depends on 4) The rail position measurement device according to claim 4, comprising a track database to store track data including gauge information at a track position and information on presence or absence of a derailment prevention guard along a running track, wherein the calculator calculates the position of the laser scanner on a basis of the track data and the measurement information obtained by the position posture measurement device. ### Claim 17 (depends on 5) The rail position measurement device according to claim 5, comprising a track database to store track data including gauge information at a track position and information on presence or absence of a derailment prevention guard along a running track, wherein the calculator calculates the position of the laser scanner on a basis of the track data and the measurement information obtained by the position posture measurement device. ### Claim 18 (depends on 1) The rail position measurement device according to claim 1, wherein the laser scanner scans a plane orthogonal to the travelling direction of the measurement vehicle or a plane inclined at a preset angle in the travelling direction from the plane orthogonal to the travelling direction of the measurement vehicle. ### Claim 19 A calculator that is used for a rail position measurement device that measures a three-dimensional position of a rail using a measurement vehicle, the calculator comprising: a position calculator to calculate a scanner position with respect to the rail from measurement information obtained by a laser scanner that is a sensor installed on the measurement vehicle so as to be capable of irradiating at least a web and a bottom of a side surface of the rail with laser light and used for measuring the three-dimensional position of the rail; and a laser position calculator to compute a movement amount or a scanner position of the laser scanner in an up-down direction on a basis of a calculation result from the position calculator and to transmit information on the movement amount or the scanner position to a laser position adjustment device capable of moving a position of the laser scanner in the up-down direction. ### Claim 20 A calculator that is used for a rail position measurement device that measures a three-dimensional position of a rail using a measurement vehicle, the calculator comprising: a position calculator to calculate a scanner position with respect to the rail from measurement information obtained by a laser scanner that is a sensor installed on the measurement vehicle so as to be capable of irradiating at least a web and a bottom of a side surface of the rail with laser light and used for measuring the three-dimensional position of the rail; and a processor configured to compute a movement amount or a movement position of a base unit equipped with the laser scanner in an up-down direction on a basis of a calculation result from the position calculator and to transmit the movement amount or the movement position to a base position adjustment device capable of moving a position of the base unit in the up-down direction.