Abstract:
A high precision method used for on-spot calibration of
distributed stereo reference position setting is presented. The
high measuring accuracy in stereo reference calibration is
derived from using a high precision water level instrument and
an accurate height vernier caliper. It settles the problem of
reference calibration effectively and accurately, without using
large coordinate measuring machines (CMM). It is more adaptable
and precise than traditional calibration methods applying
theodolites or autocollimators. The error sources of this method
are analyzed in detail and several methods are developed to
eliminate the calibration error. An optimizing swallowtail-like
anchor target is developed. Experiments show that the
calibration accuracy can be limited within 0.06 mm in the range
of 3～5
m and 0.03 mm with optimizing anchor target. This method can be
widely used in on-spot calibration.
Key words:
Position setting reference Calibration Water level On-spot
inspection Error analysis
* This project is supported by 863 Program Committee of China (No. 863-512-9804-11). Received March 16, 2001; received in revised form September 16, 2001; accepted January 24, 2002
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