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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.

Inactive Publication Date: 2011-03-30
MITAC COMP (SHUN DE) LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a system and method for correcting the reference value of pressure to altitude, so as to solve the problem that the existing GPS equipment requires the user to input the sea level atmospheric pressure value at that time before each use of the altitude measurement function

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  • System and method for correcting reference value of pressure conversion altitude

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Embodiment Construction

[0024] Such as figure 1 As shown, it is a system block diagram of the reference value of the correction pressure to altitude of the present invention.

[0025] The system for correcting the reference value of pressure to altitude in the present invention is applied in a navigation device, and the system includes:

[0026] Storage unit 10, which is used for storing a contour line geographical information;

[0027] Judgment unit 11, it is used for judging whether the geographical position information of navigation device positioning is on the contour line;

[0028] Sensing unit 12, which is used to measure the atmospheric pressure around the above-mentioned navigation equipment, and obtain the atmospheric pressure value;

[0029] The calculation unit 13 calculates a reference value according to the contour information and the atmospheric pressure value, and performs conversion calculation among the three.

[0030] Such as figure 2 Shown, a kind of method of correcting the r...

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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.

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...

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Application Information

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IPC IPC(8): G01C5/06G01S5/02G01C25/00
Inventor 王庆源
Owner MITAC COMP (SHUN DE) LTD
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