A road construction level meter and measurement method based on agps positioning

Abstract

The invention discloses a road construction level device on the basis of AGPS positioning and a measurement method. The level device includes a first receiver and a second receiver, which are connected to a resolver via optical cables in order to acquire a series of positioning time-GPS positioning height information and positioning time-cellular mobile positioning height information in unit time;then a fixing frame settlement curve is acquired; the initial point of the fixing frame settlement curve is set as a height position of a road measurement point. By means of GPS, two ends of a road are positioned; before the GPS positioning, a cellular mobile network is used for crude positioning in order to acquire an approximate position; then according to positioning satellite map, selecting aproper positioning satellite for localization; during the process, the cellular mobile network synchronously works, so that height values obtained through the two positioning process are fitted withthe correspondence of positioning to obtain a function curve; furthermore, comparison is carried out to obtain a precise height value of the measurement point. The slope of the road is acquired by theheights of the two end points without limitation by visibility range.

Description

technical field [0001] The invention relates to the field of road construction surveying and mapping, in particular to an AGPS positioning-based road construction level and a measuring method. Background technique [0002] The road accompanies human activities and promotes social progress and development. It is a symbol of historical civilization and a sign of scientific progress. Primitive roads are footpaths trampled by man. In the future, better roads will be required, soil will be taken to fill the pits, and trees will be erected to cross the stream to facilitate traffic. [0003] In the process of road construction, it is necessary to consider the requirements of different vehicle traffic properties on the road slope. For example, in the process of high-standard expressway construction, it is necessary to keep the slope of the road surface from three degrees. In plain construction, it is necessary to maintain the level of the road as much as possible. , the traditiona...

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Problems solved by technology

[0003] In the process of road construction, it is necessary to consider the requirements of different vehicle traffic properties on the road slope. For example, in the process of high-standard expressway construction, it is necessary to keep the slope of the road surface from three degrees. In plain construction, it is necessary to maintain the level of the road as much as possible. , the traditional way is to monitor the angle of the road surface through the observation of the level meter. In practical application, this method is only suitable for observation within the distance range with clear vision. The cold and warm currents lead to inconsistent air density and light refraction, which will also lead to errors. Not only that , due to the heavy weight of the observation equipment, it is difficult to perform long-distance accurate measurement. After placement, it is easy to cause settlement due to subsidence of the foundation, which will even cause measurement deviation. Therefore, a method is needed to measure the slope between the two ends of a long road section and avoid settlement errors. Tool of

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