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Base station based air pressure relative measurement method for calculating precise elevation

A technology for barometric pressure measurement and reference station, applied in the field of elevation measurement, can solve the problems of poor similarity in measurement and reduced effect of differential correction error, and achieve the effects of high distribution density, good similarity and high calculation accuracy

Inactive Publication Date: 2012-10-17
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI +2
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Problems solved by technology

However, since its correction effect is strongly related to the distance, the measurement correction accuracy is related to the distance between the measurement point and the reference point. The farther the distance is, the worse the measurement similarity is, and the effect of differential correction error will also be reduced.

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  • Base station based air pressure relative measurement method for calculating precise elevation
  • Base station based air pressure relative measurement method for calculating precise elevation
  • Base station based air pressure relative measurement method for calculating precise elevation

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Embodiment Construction

[0029] A kind of method of the present invention obtains accurate height based on the air pressure relative measurement of reference station, utilizes the design concept of difference, installs air pressure measurement, temperature at the ground mobile network base station place of ground mobile communication network or wireless local area network (or sensor network) Measure other sensors, and use the ground wireless mobile network to convert the air pressure measurement value P at the base station position 0 , Temperature measurement value T 0 and the elevation position value h 0 to the user terminal. The user terminal is also equipped with an air pressure measurement chip and a temperature measurement chip, so that the user terminal can measure the air pressure value P and temperature value T at the terminal, and use the h of the base station 0 ,P 0 , T 0 value and the P and T values ​​of the terminal measuring points can use the corresponding relationship between the ai...

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Abstract

The invention discloses a base station based air pressure relative measurement method for calculating a precise elevation. The method uses a known elevation value and an air pressure measurement value of a wireless communication network base station and an air pressure measurement value of a point to be measured to calculate the elevation of the point to be measured. In particular, the base station of ground mobile communication network is installed with an air pressure measuring sensor as a relative measurement station. A base station transmission link is used to transfer the measured data to a user; the user terminal is provided with an air pressure sensor chip to measure air pressure value of the terminal, so as to facilitate calculation of a relative elevation of the terminal to an installation location of the base station air pressure sensor by utilizing the corresponding relationship between elevation and air pressure value. Similarly, if temperature values of the base station and the terminal are known, the two temperature measurement values can be used to correct the relationship between elevation and air pressure value to further improve conversion accuracy of elevation calculation. The elevation calculation value of the method of the invention can be substituted into various positioning measurement equations to further improve accuracy of three-dimensional positioning solution of the measurement equations.

Description

technical field [0001] The invention relates to the technical field of elevation measurement, which is a method for obtaining accurate elevation based on relative air pressure measurement of a reference station, and a method for calculating the elevation of a terminal equipped with an air pressure chip and a temperature chip by using the corresponding relationship between air pressure, temperature, and elevation. Background technique [0002] A technique in the Global Positioning System (GPS) that significantly improves its accuracy and integrity is called Differential GPS (DGPS). It requires high-quality GPS "reference receivers" placed at precisely measured locations. The reference station estimates the slow-varying error components of the distance measurements from each satellite to the measurement point, and calculates the The path forms the correction value. The correction value is sent to all DGPS users through the communication link, so that the correction of the mea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C5/06
Inventor 张丽荣施浒立邓中亮吕子平马利华杜晓辉刘威余彦培
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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