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Normal height measurement method, system, server and cloud platform

A measurement system and cloud platform technology, applied in height/horizontal measurement, measurement devices, surveying and navigation, etc., can solve the problems of GNSS satellite signals blocking multipath, inability to work, inconvenient measurement, etc., to achieve a wide range of use, work The effect of high strength and low efficiency

Active Publication Date: 2020-12-25
QIANXUN SPATIAL INTELLIGENCE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The problem solved by the present invention is that the measurement of the existing normal height is inconvenient and the problem that the GNSS satellite signal is blocked and the multipath is seriously unable to work
[0016] Another problem solved by the present invention is to improve the high precision and reliability of air pressure measurement

Method used

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  • Normal height measurement method, system, server and cloud platform
  • Normal height measurement method, system, server and cloud platform
  • Normal height measurement method, system, server and cloud platform

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no. 2 approach

[0071] Second embodiment: if it is assumed that the atmosphere is a homogeneous atmosphere, that is, it is assumed that the density of the atmosphere does not vary with height, then there are:

[0072] (2-2) Calculate the distance d between the terminal and all base stations i And sorting, select the n nearest differential base stations and call the air pressure P at the same moment reported by them i , where i=1,...,n.

[0073] (2-3) Using base station air pressure P i and elevation H i , and the air pressure P at the terminal calculates the altitude H' at the terminal i , the pressure height is calculated according to the pressure height equation of the homogeneous atmosphere

[0074] H' i =7.91(P i -P)+H i

[0075] The unit of elevation is m, and the unit of pressure is hPa.

[0076] (2-4) Calculate n normal heights H' at the terminal according to the air pressure of n base stations i (i=1,...,n), and the final normal high value of the terminal is obtained after i...

no. 3 approach

[0077] The third embodiment: if it is assumed that the atmosphere is an isothermal atmosphere, that is, it is assumed that the temperature of the atmosphere does not vary with height, then there are:

[0078] (2-2) Calculate the distance d between the terminal and all base stations i And sorting, select the n nearest differential base stations and call the air pressure P at the same moment reported by them i and temperature T i , where i=1,...,n.

[0079] (2-3) According to the measured value of the temperature at the i-th base station, and the air pressure P of the base station i and elevation H i , and the air pressure P at the terminal calculates the altitude H' at the terminal i , the pressure height is calculated according to the pressure-height equation of the isothermal atmosphere

[0080]

[0081] where T m Indicates the average temperature in Celsius of the air layer, the unit of elevation is m, and the unit of air pressure is hPa.

[0082] (2-4) Calculate n n...

no. 4 approach

[0083] The fourth embodiment: if it is assumed that the atmosphere is a multivariate atmosphere, that is, it is assumed that the temperature of the atmosphere is linearly transformed with the height, then:

[0084] (2-2) Calculate the distance d between the terminal and all base stations i And sorting, select the n nearest differential base stations and call the air pressure P at the same moment reported by them i and temperature T i , where i=1,...,n.

[0085] (2-3) According to the measured value of the temperature at the i-th base station, and the air pressure P of the base station i and elevation H i , and the air pressure P at the terminal calculates the altitude H' at the terminal i , the pressure height is calculated according to the pressure height equation of the multivariate atmosphere

[0086]

[0087] Among them, the unit of elevation is m, the unit of air pressure is hPa, the unit of temperature is K, and γ is the temperature change rate, and the size is 6...

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Abstract

The invention discloses a normal high-elevation measurement method, system, a server and a cloud platform. The cloud platform acquires n base stations nearest to a user terminal according to positiondata from the user terminal, environmental parameters at the same moment reported by the n base stations are selected, and the environmental parameters of the n base stations and environmental parameters of the user terminal are processed by a pressure height equation so as to obtain the normal height. The measurement is normal and high in convenience, and even if under the condition that a GNSS (Global Navigation Satellite System) signal is blocked or has a severe multipath effect, the operation can be performed.

Description

technical field [0001] The invention relates to a normal height measurement method, a measurement system, a server and a cloud platform. Background technique [0002] Elevation information is an integral part of location data. The elevation usually used is the normal height, and the reference is the quasi-geoid. The normal height is obtained through leveling and then calculated according to the gravity measurement data. [0003] Leveling measurement belongs to the traditional method of height measurement. The error in the height difference is proportional to the distance between two points and the square root of the station number. The work intensity is high and the efficiency is low. In the long-distance and large-scale measurement, the leveling work is the most time-consuming and labor-intensive work. [0004] With the successful application of satellite positioning technology, GNSS has greatly improved the accuracy and efficiency of field survey work, but in terms of el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C5/06
CPCG01C5/06
Inventor 刘克强
Owner QIANXUN SPATIAL INTELLIGENCE INC
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