System and method for correcting reference value of pressure conversion altitude

A technology for correcting pressure and reference values, used in altitude/level measurement, radio wave measurement systems, instruments, etc.
CN101995236AInactive Publication Date: 2011-03-30MITAC COMP (SHUN DE) LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
MITAC COMP (SHUN DE) LTD
Publication Date
2011-03-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a system and method for correcting the reference value of pressure conversion altitude. The system is used in a navigational aid and comprises a storage unit, a judgment unit, a sensing unit and a computing unit, the storage unit is used for storing contour line geographic information; the judgment unit is used for judging whether the geographic position information positioned by the navigational aid is on the contour lines; the sensing unit is used for measuring the atmospheric pressure around the navigational aid and obtaining an atmospheric pressure value; and the computing unit is used for computing a reference value according to the contour line information and the atmospheric pressure value, and carrying out conversion computation among the contour line information, atmospheric pressure value and reference value. By using the system and method, a user does not need to mind the problem of setting of the reference value, and the GPS device can automatically correct the conversion reference value of the pressure altitude at any time and enable the altimeter to always keep high measurement accuracy, thereby saving trouble for the user and facilitating applications of the user.
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Description

【Technical field】

[0001] The present invention relates to a system and method for correcting the reference value of pressure-to-altitude, in particular to a system and method for automatically correcting the reference value of pressure-to-altitude. 【Background technique】

[0002] Most of the current outdoor GPS devices have the function of providing an altimeter. Its principle is to use a pressure sensor to measure the atmospheric pressure of the surrounding environment, and then convert this pressure value into the altitude value of the location. During this conversion process In the process, a conversion reference value is needed, and the atmospheric pressure value at sea level is usually used as this reference value, but the atmospheric pressure value at sea level is not a fixed number, and it will change in relative magnitude with climate change, resulting in The altitude calculated by pressure produces a large deviation. In order to solve this problem, there are current...

Claims

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