Adaptive correction method of vibration displacement errors of mobile mapping system

Abstract

The invention relates to an adaptive correction method of vibration displacement errors of a mobile mapping system, and belongs to the technical field of spatial data collection and treatment. The adaptive correction method includes the following steps of: a) enhancing original vibration displacement data as a continuous time domain vibration displacement signal dependent on multiple variable mobile mapping environmental parameters; b) classifying and analyzing characteristic relations of each measurement environmental parameter variation and signal frequency domain distribution, the relations including the mapping relation of a measurement environmental parameter variation threshold and a signal frequency domain distribution scope, and the relation of a measurement environmental parameter variation trend and the frequency domain distribution width; c) using the parameter variation threshold mapping relation to dynamically and adaptively divide the continuous time domain vibration displacement signal into signal time domain intervals with specific frequency domain distribution complexity; and d) using variation trend consistent relation to restrain a value range of internal detail level parameters, and executing vibration displacement error correction treatment in every time domain interval. The adaptive correction method of the vibration displacement errors of the mobile mapping system can solve the problem that the present signal treatment method cannot suit accurate error correction of the vibration displacement of the mobile mapping system under the complex mapping environment, and contributes to supporting the high precision mobile mapping data analysis.

Description

technical field [0001] The invention belongs to the technical field of spatial data acquisition and processing, and in particular relates to an adaptive correction method for vibration displacement errors of a vehicle-mounted mobile measurement system. Background technique [0002] The vehicle-mounted mobile measurement system (MobileMappingSystem, MMS) is based on the flexible integration of various positioning and attitude sensors and measurement sensors such as the Global Positioning System (Global Positioning System, GPS), laser scanner, image sensor and inertial measurement unit (Inertial Measurement Unit, IMU). ground mobile measurement system. MMS is not only less restricted by weather and measurement areas, but also has outstanding advantages in field work efficiency, which can effectively support the rapid collection and regular update of target information, and has gradually become an industry application in urban planning, road traffic, map repair and measurement,...

AI Technical Summary

Problems solved by technology

Therefore, in the original vibration displacement signal collected and integrally solved based on the complex mobile measurement environment, the non-stationary characteristics of the vibration signal greatly increase the complexity of the frequency domain distribution between effective information and multi-factor errors. The error correction method of unified solution is difficult to adapt to the multi-detail level change of effective information frequency domain characteristics in the continuous vibration displacement signal obtained by mobile measurement, which leads to the under-decomposition and over-decomposition of the original signal in different periods:

[0007] ① Under-decomposition will make it difficult to fully extract the effective vibration displacement from the original signal, while

[0008] ② Over-decomposition will lead to the re-introduction of error components in the vibration displacement reconstruction process based on decomposed data

[0009] In summary, the existing technical methods are difficult to achieve accurate and stable error correction of the vibration displacement of the vehicle-mounted mobile measurement system in a complex measurement environment

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