In IGPS transmitter angle calibration

it need position the transmitter approximately being concentric with the high-precision rotation platform.The traditional coaxial adjustment methods use the outer contour as a benchmark to adjust.Because of the irregular shape of the IGPS transmitter

a new coaxial adjustment method which doesn't rely on the outer contour was proposed.The six one-dimensional Position Sensitive Detector(PSD) was divided into high and low two layers which were placed in coaxial position with the highprecision rotation platform axis;the two lasers were fixed on the outside of the irregular IGPS transmitter rotation head

when laser and the IGPS transmitter rotate synchronous

the light of spot position on the PSD could determine the IGPS transmitter's axes and the high-precision rotation platform axis position relationship

consequently

realize two axes coaxial adjustment.This method not only was used for IGPS transmitter concentric with the high-precision rotation platform

but also was applicable for irregular rotating device coaxial with know shaft.According to the device error analyzing

two axes concentric adjustment error is 0.005 mm

two axes parallel adjustment error is 5″.