Method and system for measuring height or relatively axial position
First Claim
1. A method for measuring a height or a relative position in an axial direction, said method comprising the steps of:
- vertically arranging a pair of rotary laser devices, aligning respective axes of said pair of rotary laser devices into a single axis and keeping said rotary laser devices away from each other in an axial direction thereof by a predetermined interval;
arranging a light-receiving sensor, keeping said sensor radially away from said single axis;
emitting a plurality of fan-shaped laser beams from each of the rotary laser devices while rotating said laser beams, said laser beams comprising at least one fan-shaped laser beam inclined to a plane containing said single axis;
receiving and detecting the laser beams with the light-receiving sensor;
determining inclinations of the rotary laser devices relative to the light-receiving sensor, respectively, based on time intervals of said detection of the laser beams; and
detecting the position of the sensor relative to said pair of the rotary laser devices in the axial direction.
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Accused Products
Abstract
A pair of rotary laser devices are vertically arranged while aligning their respective axes into a single axis and keeping said rotary laser devices away from each other in an axial direction thereof by a predetermined interval, and a light-receiving sensor is kept radially away from the single axis. A plurality of fan-shaped laser beams are emitted from each of the rotary laser devices, while rotating the laser beams. The laser beams include at least one fan-shaped laser beam in a plane inclined to a plane containing said single axis. The laser beams are received and detected with the light-receiving sensor. Inclinations of the rotary laser devices are determined relative to the light-receiving sensor, respectively, based on time intervals of said detection of the laser beams, and the position of the sensor are determined relative to said pair of the rotary laser devices in the axial direction.
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Citations
18 Claims
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1. A method for measuring a height or a relative position in an axial direction, said method comprising the steps of:
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vertically arranging a pair of rotary laser devices, aligning respective axes of said pair of rotary laser devices into a single axis and keeping said rotary laser devices away from each other in an axial direction thereof by a predetermined interval;
arranging a light-receiving sensor, keeping said sensor radially away from said single axis;
emitting a plurality of fan-shaped laser beams from each of the rotary laser devices while rotating said laser beams, said laser beams comprising at least one fan-shaped laser beam inclined to a plane containing said single axis;
receiving and detecting the laser beams with the light-receiving sensor;
determining inclinations of the rotary laser devices relative to the light-receiving sensor, respectively, based on time intervals of said detection of the laser beams; and
detecting the position of the sensor relative to said pair of the rotary laser devices in the axial direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for measuring a height or position in an axial direction, said system comprising
a pair of rotary laser devices vertically arranged with respective axes of said pair of rotary laser devices being aligned into a single axis and said rotary laser devices being kept away from each other in an axial direction thereof by a predetermined interval; - and
a light-receiving sensor arranged so that said sensor is kept radially away from said single axis, wherein a plurality of fan-shaped laser beams are emitted from each of the rotary laser devices while said pair of the rotary laser devices are rotated around said single axis, said plurality of laser beams comprise at least one fan-shaped laser beam in a plane inclined to a plane containing said single axis, the light-receiving section receives and detects said laser beams, inclinations of the rotary laser devices are detected relative to the light-receiving sensor, respectively, based on time intervals of said detection of the laser beams, and the position of the sensor is detected relative to said pair of rotary laser devices in the axial direction. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification