Short-distance measurement method based on GPS positioning signal

Abstract

The invention discloses a short-distance metering method based on GPS positioning signals. The method comprises the following steps: the step 1, respectively splitting and storing longitude and latitude data acquired by two GPS devices; collecting 64-bit data longitude signals and 64-bit data latitude signals at two positions, storing an integer bit of longitude by using a 32-bit real number JSa,storing a decimal bit of longitude by using a 32-bit real number JXa, storing an integer bit of latitude by using a 32-bit real number WSa, and storing a decimal bit of latitude by using a 32-bit realnumber WXa; dividing the acquired two groups of longitude and latitude into eight 32-bit data; the step 2, calculating two groups of latitude distance differences; the step 3, calculating two groupsof longitude distance differences; the step 4, converting all data into 32-bit floating-point numbers, and calculating once; and the step 5, calculating the actual distance between the two devices. The method has the advantages of high precision, simple operation and low cost, and can be widely applied to the field of equipment positioning.

Description

technical field [0001] The invention relates to the field of equipment positioning, in particular to a short-distance measurement method based on GPS positioning signals. Background technique [0002] With the gradual improvement of GPS positioning accuracy, the application occasions of GPS are gradually expanding. The anti-collision protection control between two moving objects based on GPS positioning signals is a new application direction. This application is to install GPS positioning devices on two mobile devices, monitor the latitude and longitude of the two devices at the same time, and obtain the distance between the two devices through the formula of latitude and longitude conversion, so as to judge the collision avoidance. [0003] Calculate the distance between two locations through the latitude and longitude of two different locations. There are different calculation formulas according to different schemes. Most of them are based on the standard output format GN...

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Problems solved by technology

Then there are square root and arcsine calculations, which are more prone to calculation errors and data overflow

[0010] 3. Each calculation unit in the above formula is an operation performed on a minimum value. In this case, even if there is a calculation value, it is extremely difficult for the calculation equipment to guarantee the accuracy of the calculation.

Most PLC controllers store and calculate data using 16-bit and 32-bit. If the calculation formula of the aforementioned formula is used, the desired result cannot be obtained

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