초록 ▼

A measuring system comprising a fixed measurement unit (101), a data processing unit (130) and a mobile unit (120). The mobile unit comprises a planar base (111), a reflector (118), an elevation element (119) fixed to the base and the reflector, and attaching the reflector to a fixed position in res

A measuring system comprising a fixed measurement unit (101), a data processing unit (130) and a mobile unit (120). The mobile unit comprises a planar base (111), a reflector (118), an elevation element (119) fixed to the base and the reflector, and attaching the reflector to a fixed position in respect of the base. The mobile unit comprises also mobility means (112) for moving the base along a surface (113) such that the spatial orientation of the base (114) substantially corresponds with the spatial orientation of the currently underlying part of the surface. In addition the mobile unit comprises tilt measuring means (123) for determining a deviation between the spatial orientation of the base and a plane perpendicular to the ambient gravitational force, and tilt elimination means for eliminating the effect of the determined deviation. Measurement results are thus more accurate.

대표청구항 ▼

1. A measurement system comprising: a fixed measurement unit configured to remain stationary during measurement of two rails which collectively form a runway;a mobile measurement unit; anda computing unit;the mobile measurement unit comprising: a base and a reflector;an elevation element fixed to th

1. A measurement system comprising: a fixed measurement unit configured to remain stationary during measurement of two rails which collectively form a runway;a mobile measurement unit; anda computing unit;the mobile measurement unit comprising: a base and a reflector;an elevation element fixed to the base and the reflector, and attaching the reflector to a known position in respect of the base;wherein the base has a reference plane in a known position with respect to the base such that the tilt of the base in respect of a computational horizontal plane can be determined based on the tilt of the reference plane;mobility means configured to separately move the base along a surface defined by each of the two rails, such that the spatial orientation of the reference plane of the base corresponds with the spatial orientation of a currently underlying part of the surface;the mobility means comprising a rail tracker for moving the mobile unit substantially along a track formed by the mid-line of the top surface of one of the rails;tilt measuring means for determining a tilt of the mobile measurement unit as a deviation between the reference plane of the base and a plane perpendicular to the ambient gravitational force;a transmitter which transmits the determined tilt to the computing unit;the fixed measurement unit comprising: a tachymeter which generates a rectilinearly progressive signal to the reflector mounted on the mobile measurement unit and determines a position of the reflector with respect to the fixed measurement unit for each of the two rails based on the generated rectilinearly progressive signal and the reflection, wherein a position of the tachymeter remains the same for measurements of the two rails;an interface which transmits the determined positions of the reflector successively for the two rails to the computing unit;the computing unit comprising: a receiver which receives the determined tilt from the mobile measurement unit and the determined positions of the reflector from the fixed measurement unit, successively for the two rails;a processor which computes a tilt-corrected result representing dimensions of the measured surface, on the basis of the determined positions of the reflector and the determined tilt of the mobile measurement unit,wherein the tilt of the mobile measurement unit is measured in form of a tilt angle between the reference plane of the base and the plane perpendicular to the ambient gravitational force, and the reflector is fixed with respect to the base such that a deviation between the reflector and the ambient gravitational force corresponds to the deviation between the spatial orientation of the base and a plane perpendicular to the ambient gravitational force, andwherein the processor, after receiving the tilt and determined positions of the reflector successively for the two rails, further computes dimensions of the runway, based on differences between the tilt-corrected results representing dimensions of the measured surfaces of the respective rails. 2. The measurement system according to claim 1, wherein the mobile unit further comprises a camera and the measurement system comprises an image tracker configured to associate an image taken with the camera to the position of the mobile unit where the image was taken. 3. The measurement system according to claim 1, wherein the mobility means comprises at least two parallel wheels, and the mobile measurement unit further comprises a vertical control mechanism configured to lift or lower the at least two parallel wheels, independently of each other, to correct the tilt of the mobile measurement unit based on the tilt-corrected result. 4. A method comprising: performing a measurement cycle for each of two rails which collectively form a runway, each measurement cycle comprising the following steps: at a fixed measurement unit, the fixed measurement unit being fixed during both measurement cycles: generating a rectilinearly progressive signal by a tachymeter, detecting a reflection of the rectilinearly progressive signal from a reflector mounted on a mobile measurement unit, and determining a position of the reflector based on the generated rectilinearly progressive signal and the reflection;transmitting the determined position of the reflector to a computing unit;at the mobile measurement unit, which has a base and the reflector, the base having a reference plane in a fixed position with respect to the body such that the tilt of the base in respect of a computational horizontal plane can be determined based on the tilt of the reference plane, the reflector being attached to a known position in respect of the base: moving the base along a surface defined by one of the two rails such that the spatial orientation of the reference plane of the base substantially corresponds with the spatial orientation of a currently underlying part of the surface;determining a tilt of the mobile measurement unit as a deviation between the reference plane of the base and a plane perpendicular to the ambient gravitational force;transmitting the determined tilt to the computing unit; andat the computing unit: receiving the determined tilt from the mobile measurement unit, and receiving the determined position of the reflector from the fixed measurement unit; andcomputing a tilt-corrected result representing dimensions of the measured surface, on the basis of the determined position of the reflector and the determined tilt of the mobile measurement unit; andafter completing the above steps using the same fixed measurement unit, mobile measurement unit and computing unit for both measurement cycles, computing dimensions of the runway, based on differences between the tilt-corrected results representing dimensions of the measured surfaces of the respective rails,wherein the tilt of the mobile measurement unit is measured in form of a tilt angle between the reference plane of the base and the plane perpendicular to the ambient gravitational force, and the reflector is fixed with respect to the base such that a deviation between the reflector and the ambient gravitational force corresponds to the deviation between the spatial orientation of the base and a plane perpendicular to the ambient gravitational force. 5. The method according to claim 4, wherein the mobility means comprises at least two parallel wheels, and the mobile measurement unit further comprises a vertical control mechanism configured to lift or lower the at least two parallel wheels, independently of each other, to correct the tilt of the mobile measurement unit based on the tilt-corrected result.