METHOD FOR CALIBRATING A THZ MEASURING APPARATUS, THZ MEASURING METHOD AND CORRESPONDING THZ MEASURING APPARATUS

摘要

The invention relates to a method for calibrating a THz measuring apparatus (8), in particular a pipe, on a measurement object (10), comprising at least the following steps: providing a THz measuring apparatus (8) having a plurality of pivotable THz sensors (1), arranged in a circumferential direction around a measuring chamber (9), for outputting one THz transmitted beam (12) each along a sensor axis (B) (provision step); orienting the THz sensors (1) into a starting position in the measuring chamber (9) in which the measurement object (10) is received (orientation step in starting position); allocating the THz sensors (1) to at least one first and one second sensor group (group formation step); first calibration adjustment step, in which the second sensor group is adjusted as an adjustment group by means of the first sensor group as a starting group, and corresponding second calibration adjustment step, in which the first sensor group is adjusted as an adjustment group by means of the previously calibration-adjusted second sensor group as a starting group; wherein, in each of the calibration adjustment steps = by means of the THz sensors (S1, S3, S5, S7) of the starting group, spacing points on a surface (10a) of the measurement object (10) are determined, = sensor correction angles of the THz sensors (1; S2, S4, S6, S8) of the adjustment group are determined by means of the spacing points determined by the starting group, and = the THz sensors of the adjustment group are calibration-adjusted about the determined sensor correction angles (a).