# US 11,306,450 B2 · Road surface profiler, road surface profiler performance measuring instrument, and method for assessing performance of same road surface profiler by using same measuring instrument > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,450 B2 - Document ID: US11306450B2 - Status: Granted - Kind: B2 - Application number: 16/474,471 - Filed: 2017-12-28 - Published: 2019-11-14 - Granted: 2022-04-19 - Earliest claimed: 2016-12-28 - Assignees: Korea Expressway Corp. - Applicants: Korea Expressway Corp. - Inventors: Dueck Su Sohn; Jae Hoon Lee - Web page: https://patentgrep.com/patent/US11306450B2 ## CPC - E01C 23/01: Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed {or reference line} supports (form rails E01C19/50); Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs (E01C23/07 takes precedence; measuring roughness or irregularity in general G01B) - B60W 40/06: Road conditions - G01B 5/28: for measuring roughness or irregularity of surfaces - G01C 7/04: involving a vehicle which moves along the profile to be traced - G01D 21/02: Measuring two or more variables by means not covered by a single other subclass - G01M 99/00: Subject matter not provided for in other groups of this subclass - G06F 17/10: Complex mathematical operations {(function generation by table look-up G06F1/03; evaluation of elementary functions by calculation G06F7/544)} - E01C: CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming roads or like surfaces by compacting or grading snow or ice E01H) - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - 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) - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Provided according to the present invention is a road surface profiler performance measuring instrument, which implements a virtual road surface state in order to assess the performance of a road surface profiler (A) including a distance measurement unit (10) and a flatness measurement unit (20), the measuring instrument comprising: a travel operation unit (100) for augmenting movement distance information (a) generated by the distance measurement unit (10); and a height adjustment unit (200) for changing height information (b) generated by the flatness measurement unit (20). ## Claims ### Claim 1 A road surface profiler performance measuring instrument for implementing a virtual road condition to assess the performance of a road surface profiler (A) including a distance measurement unit (10) and a flatness measurement unit (20), the road surface profiler performance measuring instrument comprising: a travelling unit (100) configured to increase moving distance information (a) generated by the distance measurement unit (10); a height adjustment unit (200) configured to change height information (b) generated by the flatness measurement unit (20); and a control unit (300) configured to control the travelling unit (100) and the height adjustment unit (200), wherein the distance measurement unit (10) is a circular wheel (11), and the travelling unit (100) comprises: a conveyor belt (110) on which the circular wheel is mounted; and a rotary drum (120) configured to move the conveyor belt (110), the circular wheel (11) comprises: a front wheel (11) positioned on the front of the distance measurement unit (10) in a moving direction of the distance measurement unit (10); and a rear wheel (12) positioned in rear of the front wheel (11), and the flatness measurement unit (20) comprises an angle measurement sensor (21), the angle measurement sensor (21) measures an inclined angle (c) formed by the front wheel (11) and the rear wheel (12), and the height adjustment unit (200) comprises a rotating unit (210) configured to change an angle formed by the conveyor (110). ### Claim 2 (depends on 1) The road surface profiler performance measuring instrument of claim 1, wherein the flatness measurement unit (20) generates the height information (b) comprising information (d) on the difference in height between the front wheel (11) and the rear wheel (12) according to the following formula 1 by using the inclined angle (c), d(h1−h2)=tan(c)×L, [Formula 1] where h1: the height of the front wheel (11) on a predetermined reference surface (S), h2: the height of the front wheel (12) on the predetermined reference surface (S), and L: the length between a center axis of the front wheel (11) and a center axis of the rear wheel (12). ### Claim 3 (depends on 2) The road surface profiler performance measuring instrument of claim 2, wherein the flatness measurement unit (20) generates road surface shape information (f) by using the moving distance information (a) and the height information (b). ### Claim 4 (depends on 3) The road surface profiler performance measuring instrument of claim 3, further comprising a constraint unit (400) configured to constrain a holding unit (30) mounted on the road surface profiler (A). ### Claim 5 (depends on 4) The road surface profiler performance measuring instrument of claim 4, wherein the constraint unit (400) comprises: a first constraint unit (410) coupled to the holding unit (30); and a second constraint unit (420) coupled to the first constraint unit (400) and configured to fix a front surface (A1) and a rear surface (A2) of the road surface profiler A. ### Claim 6 (depends on 5) A method for assessing the performance of a road surface profiler by using the road surface profiler performance measuring instrument of claim 5, the method comprising: a first step (S100) of inputting the test road surface shape information (g) to the control unit (300); a second step (S200) of deriving the road surface shape information (f) by using the travelling unit (100) and the height adjustment unit (200); and a third step (S300) of assessing the performance of the road surface profiler (A) by comparing the test road surface shape information (g) with the road surface shape information (f). ### Claim 7 (depends on 4) The road surface profiler performance measuring instrument of claim 4, wherein the control unit 300 controls the travelling unit (100) and the height adjustment unit (200) by using test road surface shape information (g), and the control unit (300) assesses the performance of the road surface profiler (A) by comparing the test road surface shape information (g) with the road surface shape information (f).