Digitalized clinometer and measuring method thereof

Abstract

The invention discloses a digitalized clinometer and a measuring method thereof, wherein the clinometer comprises a processor, an inclination sensor, a filtering unit, a power system and a digital readout division rotary table; the inclination sensor provides the inclination angle with high resoluation, the filtering unit filters the analog signal which is output by the inclination sensor, high-precision analog-to-digital conversion is carried out on the filtered analog signal which is output by the inclination sensor through the processor, digital signal filtering is carried out in the processor, so inclination output information is really reflected; angle conversion is carried out on the signal which undergoes the digital processing through the processor, the digital readout division rotary table is utilized to test the data which are required by the linear compensation of the inclination sensor, so the appropriate linear calibration coefficient is calculated; and after the test, the processor utilizes the calculated linear calibration coefficient to linearly compensate the measured angle data. The invention can provide the measurement accuracy of 20 arc second at normal temperature, can simultaneously ensure the maximum drift of plus or minus 0.03 DEG C with the temperature range of minus 40 DEG C-85 DEG C, and has obvious advantage compared with the existing digitalized clinometer.

Description

Technical field [0001] The invention belongs to the technical field of measurement, and relates to an inclinometer, in particular to a digital inclinometer for level measurement and automatic leveling; meanwhile, the invention also relates to a digital inclinometer measuring method. Background technique [0002] The digital inclinometer is an instrument used to measure the tilt change of an object over time and the change of the plumb line over time. [0003] Accuracy is a key indicator to measure the digital inclinometer, and directly determines the performance of the digital inclinometer. The measurement accuracy of the existing digital inclinometer is low, generally 0.05 or worse. [0004] Temperature is an important factor affecting the measurement accuracy of the digital inclinometer. The change of temperature will affect the output change of the digital inclinometer, causing the measurement accuracy to deteriorate. The existing digital inclinometer has a large temperature drift...

AI Technical Summary

Problems solved by technology

[0003] Accuracy is a key index for measuring digital inclinometers, which directly determines the performance of digital inclinometers. The measurement accuracy of existing digital inclinometers is low, generally 0.05 or worse

[0004] Temperature is an important factor that affects the measurement accuracy of the digital inclinometer. Changes in temperature will affect the output of the digital inclinometer, resulting in poor measurement accuracy. The existing digital inclinometers have a large temperature drift, generally at ±0.4°

[0005] Response frequency is a performance index that reflects the dynamic measurement of the digital inclinometer. The digital output of the high-precision digital inclinometer is processed by digital filtering, such as FIR or IIR and other digital filtering methods, which will cause the response of the digital inclinometer to lag

[0006] Orthogonality error is the spatial non-orthogonality of the two sensitive axes of the dual-axis digital inclinometer, resulting in cross-coupling between the axes during measurement, affecting measurement accuracy, or affecting surface leveling

[0007] In addition, the existing high-precision digital inclinometers generally need linear compensation, temperature compensation, and quadrature compensation in the control software. These compensation data need to be analyzed and extracted from multiple measurement data, and finally solidified into the digital inclinometer software. In this way, it will lead to an increase in the workload of production, and it will take more man-hours to produce a unit of product, which will increase the cost

At the same time, the interface provided by the existing digital inclinometer is relatively simple

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