Patent Document ID: 20160265903
Application ID: 15031752
Patent Status: 0

Claim One:
1. An accuracy traceability method based on precision coordinate control network for wMPS (workshop Measurement Positioning System), comprising the following steps: Step 1: providing N SMR nests and M stations in the measurement space and arranging a laser tracker ( 201 ) in station 1; Step 2: arranging an SMR ( 202 ) on SMR nest 1 to form a global control point 1, measuring 3-d coordinates of global control point 1, and by the same manner, moving the SMR ( 202 ) to SMR 2, SMR 3. .. until SMR N−1 and SMR N respectively to measure the 3-d coordinates of global control point 2, global control point 3. .. until global control point N−1 and global control point N; Step 3: arranging the laser tracker ( 201 ) on station 2, station 3. .. until station M−1 and station M in sequence, and repeating the step 2 after each time the laser tracker ( 201 ) is moved, thus obtaining measurements for all the global control points via all the stations and in the step 2 and step 3, the laser tracker ( 201 ) must measure at least 3 global control points at each station; Step 4: calculating the positions (locations and orientations) of stations according to the 3-d coordinates of all global control points at all stations, thus obtaining initial iteration values of 3-d coordinates of all the stations and global control points; Step 5: using the range value from station to global control point measured by the laser tracker ( 201 ) as a constraint to establish optimization goal equation for adjustment calculation; by using the dynamic weighting method, tracing the measurement accuracy of 3-d coordinates of global control points to that of the interferometer range measurement of the laser tracker ( 201 ), thus establishing the precision coordinate control network; Step 6: arranging and initializing a plurality of transmitters ( 101 ), and then calibrating the transmitters in combination with the precision coordinate control network to establish the measurement network; Step 7: measuring the global control points and measured points simultaneously by using wMPS (workshop Measurement Positioning System), and using the 3-d coordinates of global control points as the constraint for adjustment calculation to obtain the 3-d coordinates of the measured points, and finally tracing the obtained 3-d coordinates of the measured points to the precision coordinate control network.