Vehicle-mounted road geometric linear information automatic measurement device and method

Abstract

The invention provides a device and method for automatically measuring geometric linear information of vehicle-mounted roads. The device is characterized by comprising an inertial measurement unit, athree-dimensional laser device, a range finder and a computer terminal. The three-dimensional laser device consists of a left laser device and a right laser device. The inertial measurement unit, thethree-dimensional laser device and the range finder are connected to the computer terminal, vehicle data and the road geometric-linear information obtained in the driving process are transmitted to and acquired from the computer terminal in real time. The method for automatically measuring geometric linear information of vehicle-mounted roads is based on the device. By adopting the device and method, high-speed, efficient and road-network-level automatic acquisition of geometric linear information of vehicle-mounted roads can be achieved, data acquisition difficulty and labor consumption are reduced, vibration of vehicles in geometric detection of roads and errors brought by offset are eliminated, and the measuring accuracy is improved. The device and method can be applied to road completion acceptance of road administration department and acquisition of road information big data.

Description

technical field [0001] The invention belongs to the field of road measurement, in particular to a vehicle-mounted automatic measurement device and method for road geometric linear information. Background technique [0002] At present, the method of manual surveying and mapping is used to collect road geometric parameters at home and abroad, but this method has low detection efficiency and low accuracy, and consumes a lot of manpower and material resources. Collecting data on expressways affects traffic, is not conducive to driving safety, and cannot realize the road network. level data collection and analysis. [0003] The measurement methods for the radius of the road horizontal curve at home and abroad mainly use satellite map data, combined with the chord length method, the chord plane circle method and the circle fitting method to calculate the road horizontal curve radius. However, the data accuracy of satellite maps is too low, and the occlusion of road trees, billboa...

AI Technical Summary

Problems solved by technology

However, the instrument cannot directly measure the straight circle / circle point of the horizontal curve, and the inclination of the vehicle body and the change of the vehicle speed will affect the accuracy of the radius measurement of the horizontal curve

The Geographic Information System (GIS) calculates the relevant parameters of the horizontal curve by recording the position and track information of the vehicle. However, the current algorithm, such as entering the circle matching method, is still unable to automatically calculate the straight circle / circle point of the horizontal curve. Recognition and positioning still require a lot of manual assisted measurement, and there is still a lack of automatic recognition capabilities for complex curves, so efficient road network-level measurement is still not possible

At the same time, although the on-board equipment realizes automatic data collection, it also brings new errors: the deviation and bump of the vehicle during the detection process will affect the detection results

However, there are very few studies to correct the measurement results for the errors caused by the detection vehicles.

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