Source imaging-based laser plummet digital calibrating method and device

Abstract

The invention discloses a source imaging-based laser plummet digital calibrating method and device. According to the method, a reticle is used as a projection entity, an imaging light source is used for reticle imaging so that the image of the reticle is projected to a target at the infinite point and an infinite projection state is simulated, the comparison between the projection state and a debugging reference center of the target is carried out, and according to an infinite offset state, the reticle is adjusted. Compared with the prior art utilizing a device for projecting the reference center at the infinite point to a reticle, the method provided by the invention has higher calibrating precision. The method realizes amplification of image information of the target by an image amplification processing system, is convenient for observation calibration by a user and further improves calibration accuracy.

Description

technical field [0001] The invention relates to a calibration method for a laser plummet, in particular to a digital calibration method and device for a laser plummet based on source imaging. Background technique [0002] The laser plummet is an instrument that uses the principle of laser alignment to determine the plumb line. It can be used to measure the small horizontal deviation relative to the plumb line and the point transfer of the plumb line, and the measurement of the vertical contour of the object. In recent years, with the rapid development of the economy, the demand for laser plummets is increasing, and its use has fully penetrated into the fields of national economic construction and military manufacturing, such as building construction, industrial installation, engineering supervision, deformation observation, etc. , the requirements for its accuracy are getting higher and higher, and the plummet needs to be calibrated and adjusted in the process of leaving the...

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Problems solved by technology

[0003] At present, the laser plummet is calibrated according to the "JJF 1081-2002 Calibration Specification for Plummet" issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. Set a light source and the debugging reference center at a distance, project the image of the debugging reference center into the laser plummet through the irradiation of the light source on the debugging reference center, observe the image of the debugging reference center through the eyepiece observation port of the laser plummet, In this way, the reticle is calibrated and adjusted, and it is calibrated and adjusted by rotating it at different angles for many times. The accuracy is reduced, which reduces the work efficiency, and because the eyepiece observation port of the laser plummet is small, human eye observation is easy to cause eye fatigue. At the same time, when performing multi-angle calibration and adjustment, the user also needs to follow the rotation of the laser plummet. , making the calibration process complex and difficult to operate

[0004] People have improved this. By setting an image acquisition and amplification system at the eyepiece observation port of the laser plummet, the image information observed by the eyepiece observation port is enlarged and displayed, which provides convenience for the staff to observe, and correspondingly The detection accuracy is improved. However, although this setting can overcome the problems of human eye fatigue and constantly changing the observation position, due to the large volume of the image acquisition and amplification system, and the adjustment screw of the reticle is set close to the eyepiece observation port, when the image When the acquisition and amplification system is set at the observation port of the eyepiece, it is difficult to adjust the adjustment screw, and the focal length of the eyepiece focus of different laser plummets is inconsistent. When calibrating different laser plummets, the image acquisition and amplification system needs to be based on The focal length of its eyepiece focus is refocused, and its calibration work becomes more complicated, and the difficulty increases

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