# US 2019/0170865 A1 · Surveying device, and calibration method and calibration program for surveying device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170865 A1 - Document ID: US20190170865A1 - Status: Published application - Kind: A1 - Application number: 16/205,420 - Filed: 2018-11-30 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: Topcon Corporation - Applicants: Topcon Corporation - Inventors: You SASAKI - Web page: https://patentgrep.com/patent/US20190170865A1 ## CPC - G01S 7/497: Means for monitoring or calibrating - G01C 3/02: Details - G01C 15/002: {Active optical surveying means (optical plumbing G01C15/105)} - G01C 25/00: Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass (testing, calibrating or compensating compasses G01C17/38) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - 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 technique is provided to enable check of calibrated condition of a total station (TS) having a laser scanner at a surveying site. The TS includes an optical system, a laser positioning part, a plane equation calculator, a laser scanner, a separation amount calculator, and an exterior orientation parameter calculator. The laser positioning part emits laser light on an object via the optical system to position the object. The plane equation calculator calculates an equation of a specific plane on the basis of result from the laser positioning part. The laser scanner scans the specific plane with laser light to obtain scanning points. The separation amount calculator calculates a separation amount of the respective scanning points from the specific plane. The exterior orientation parameter calculator calculates exterior orientation parameters of one or both of the laser positioning part and the laser scanner so that the separation amount will be small. ## Claims ### Claim 1 A surveying device comprising: an optical system to be used for sighting a positioning target; a laser positioning part that emits laser light via the optical system to the positioning target to position the positioning target; a plane determining part that determines a location of a specific plane on a basis of a result of the positioning performed by the laser positioning part; a laser scanner that performs laser scanning of the specific plane to obtain multiple scanning points; a separation amount calculator that calculates a separation amount of the respective multiple scanning points obtained by the laser scanner, from the specific plane of which the location is determined by the plane determining part; and an exterior orientation parameter calculator that calculates exterior orientation parameters of one or both of the laser positioning part and the laser scanner on a basis of the calculated separation amount. ### Claim 2 A surveying device comprising: an optical system to be used for sighting a positioning target; a laser positioning part that emits laser light via the optical system to the positioning target to position the positioning target; a plane determining part that determines a location of a specific plane on a basis of a result of the positioning performed by the laser positioning part; a laser scanner that performs laser scanning of the specific plane to obtain multiple scanning points; a separation amount calculator that calculates a separation amount of the respective multiple scanning points obtained by the laser scanner, from the specific plane of which the location is determined by the plane determining part; and an appropriateness judging unit that judges an appropriateness of a calibrated condition relating to exterior orientation parameters of the laser positioning part and the laser scanner, on a basis of the calculated separation amount. ### Claim 3 (depends on 1) The surveying device according to claim 1, wherein each of multiple planes having different normal vectors is selected as the specific plane. ### Claim 4 (depends on 1) The surveying device according to claim 1, wherein the laser positioning part positions three or more points on the specific plane to determine the location of the specific plane. ### Claim 5 (depends on 4) The surveying device according to claim 4, wherein a distribution area of the three or more points and a laser scanning area of the laser scanner overlap. ### Claim 6 (depends on 4) The surveying device according to claim 4, wherein a laser scanning area of the laser scanner is set within a distribution area of the three or more points. ### Claim 7 (depends on 1) The surveying device according to claim 1, further comprising a noise eliminating part that calculates a fitting plane to which the multiple scanning points fit, and the noise eliminating part eliminating a scanning point, of which a separation amount from a fitting plane is a specified value or greater, as a noise point from among the multiple scanning points. ### Claim 8 (depends on 1) The surveying device according to claim 1, wherein the separation amount is a distance between the specific plane, of which the location is identified by the plane determining part, and a fitting plane that fits to the multiple scanning points obtained by the laser scanner. ### Claim 9 A calibration method of a surveying device, comprising: determining a location of a specific plane by positioning three or more points on the specific plane by using a laser positioning part; performing laser scanning of the specific plane by a laser scanner to obtain multiple scanning points; calculating a separation amount of the respective multiple scanning points obtained by the laser scanning, from the specific plane of which the location is determined; and calculating exterior orientation parameters of one or both of the laser positioning part and the laser scanner on a basis of the separation amount. ### Claim 10 (depends on 2) The surveying device according to claim 2, wherein each of multiple planes having different normal vectors is selected as the specific plane. ### Claim 11 (depends on 2) The surveying device according to claim 2, wherein the laser positioning part positions three or more points on the specific plane to determine the location of the specific plane. ### Claim 12 (depends on 2) The surveying device according to claim 2, further comprising a noise eliminating part that calculates a fitting plane to which the multiple scanning points fit, and the noise eliminating part eliminating a scanning point, of which a separation amount from a fitting plane is a specified value or greater, as a noise point from among the multiple scanning points. ### Claim 13 (depends on 2) The surveying device according to claim 2, wherein the separation amount is a distance between the specific plane, of which the location is identified by the plane determining part, and a fitting plane that fits to the multiple scanning points obtained by the laser scanner.