A multi-range integrated laser measuring head device and its application method

Abstract

The invention discloses a multi-range integrated laser probe device and a using method thereof. At present, methods of obtaining multiple ranges are mainly realized by switching probes of different ranges, the measurement cost is high and the auxiliary time is long. The device of the present invention comprises a first range main substrate, a chip holder, a position sensitive component, a receiving lens, a receiving lens holder, a first focusing lens, a first lens holder, a first holder, a first laser, a positioning mounting member, a second range plate, a third range plate, a fourth range plate and a compression bolt. The range plates and the position sensitive component and the receiving lens on the first range main substrate constitute measurement units of different ranges. The device provided by the invention changes the range of the probe device by the fast switching of different range plates, thereby obtaining four ranges with magnifications increasing according to the priority number. One probe device can cope with a plurality of measurement objects of different scales, and meets various measurement requirements. The probe device has a simple structure and is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of laser non-contact measurement of geometric quantities, and in particular relates to a multi-range integrated laser measuring head device and a use method thereof. Background technique [0002] In the field of geometric quantity detection, laser non-contact measurement methods mainly include: triangulation method, interferometry method, time-of-flight method, frequency modulation continuous wave method, frequency comb method, etc. Among them, the laser triangulation probe has a wide range of applications in geometric measurement, part shape detection, and surface digitization due to its high measurement accuracy, convenient application method, and relatively low equipment cost. [0003] The measuring range of the current laser triangulation measuring head is fixed, and one measuring head corresponds to one measuring range. However, the actual measurement task may have to deal with a variety of measurement...

AI Technical Summary

Problems solved by technology

[0007] Among the above methods, method (1) is the most direct and simple way to solve the problem, but equipped with multiple probes will directly increase the measurement cost, especially for some ranges that are not frequently used, the cost of configuring sensors for them alone is too high

In addition, when faced with a variety of measurement objects of different scales, it may be necessary to switch sensors frequently, and each switch needs to be reinstalled and calibrated, which may affect the measurement efficiency

[0008] Method (2) can better expand the range of the laser probe, but the precision lifting platform is generally expensive, and has high requirements for the measurement site and environment

In addition, the lifting platform is generally equipped with special control software, and there may be problems in the software integration and data fusion of the laser probe.

[0009] Method (3) can make a single sensor obtain various ranges, but it is difficult to ensure the precise positioning of the position sensitive element within the movable range and the repeat positioning accuracy

In addition, the corresponding relationship between the range and the output of the position sensitive element, as well as the measurement accuracy of the sensor at each range position must be strictly calibrated, and regular calibration is required. The calibration and calibration process is very cumbersome

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