Accurate positioning system and accurate positioning navigation system based on two fixed reference points

Abstract

The invention relates to the field of positioning, in particular to an accurate positioning system and an accurate positioning navigation system based on two fixed reference points. The accurate positioning system comprises: two light-emitting modules, two light-emitting points emitted by the light-emitting modules being used as fixed reference points; an image acquisition module used for acquiring an image containing two fixed reference points at the same time; an image processing module used for processing the acquired image and extracting positioning information A(PRG1, x1 and y1) and B(PRG2, x2 and y2) of the two fixed reference points; and a positioning calculation module used for calculating the unique position information C(x0, y0) of the image acquisition module through the positioning information of the two fixed reference points and an analytic function f (x0, y0)=f(PRG1, x1, y1)*f(PRG2, x2, y2). Accurate positioning can be achieved only through the two fixed reference points, and communication between the image acquisition module and the two light-emitting modules is established by the radio frequency module so as to achieve adjustment of the positions and brightness ofthe two light-emitting points.

Description

technical field [0001] The invention relates to the field of positioning, in particular to an accurate positioning system and a navigation system based on two fixed reference points. Background technique [0002] There are many positioning methods in the prior art, and the closest to the technical solution of the present invention is the use of the trilateral method for absolute positioning. Three intersecting circles use known distances to calculate the position to a fixed reference point. [0003] Such as figure 1 As shown, three points A(x 1 ,y 1 ), B(x 2 ,y 2 ), C(x 3 ,y 4 ) as the center of the circle, and the distance from the nearest reference label to the label to be tested is used as the radius to make a circle, and the radii are d 1 、d 2 、d 3 , the intersection point of the three circles obtained is D, and the schematic diagram of the triangle algorithm is shown in figure 2 shown. Suppose the position node D(x, y), then the position of position D can be...

AI Technical Summary

Problems solved by technology

[0007] However, in practical applications, due to the existence of measurement errors, it is difficult for three circles to intersect at one point.

And this is a common thing, which will cause the equation to have no solution, and the position of the target to be measured cannot be located; from the outside, there must be at least three known distances when calculating the position by the trilateral method

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