Method for automatically computing sun direction and automatic calculator thereof

A technology for automatic calculation, calculator

Inactive Publication Date: 2008-06-25
ZHEJIANG INST OF COMM
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] Using the true azimuth of a celestial body (such as the sun) as the reference azimuth for calibrating pointing equipment is a common method used by surveyors such as captains and cal

Method used

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  • Method for automatically computing sun direction and automatic calculator thereof
  • Method for automatically computing sun direction and automatic calculator thereof
  • Method for automatically computing sun direction and automatic calculator thereof

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[0032] The system structure of the automatic solar azimuth calculator is shown in Figure 3. It is composed of a clock generator, a power supply, a communication interface, a combination of keys, a CPU circuit, an information display screen, a setting data memory, a list data memory, and a program memory. The setting data memory stores the surveyor's latitude and longitude, time setting data, and magnetic deviation; the list data memory stores the sun declination and time difference database; the program memory stores the computer process binary code. For example, the data of the solar declination table in Table 1 and the time difference table in Table 2 are stored in the setting data memory. According to the above system, 1. The real-time time signal is provided by the time generator, and the corresponding declination and time difference are extracted from the solar declination and time difference database in the setting data memory, and the true sun is calculated according to the...

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Abstract

The invention discloses an automatic computational method for solar azimuth and is characterized in that: a time signal extracts declination and time difference from a database, the local hour angle of the real solar is calculated according to the latitude and longitude of the observer, the time and the time difference; solar real-time true azimuth is calculated through an equation according to the latitude and longitude of the observer, the declination and the hour angle, and the accurate solar magnetic azimuth is obtained by subtracting the magnetic deviation. An automatic calculator is formed by the connection of a clock generator, a power supply, a communication interface, a composite key, a CPU circuit, an information display, a setting data storage, a list data storage and a program storage. The invention has the advantages that: the solar true azimuth, the solar declination, the time difference, and the local hour angle and so on, can be automatically calculated and displayed on the display, which relieves the user from the past trivial and time-consuming manual calculation; the solar azimuth automatic calculator is also provided with the communication interface and can be connected with a communication navigation system equipment.

Description

technical field [0001] The invention relates to an automatic calculation method of the sun's azimuth and an automatic calculator using the method, thereby changing the backward situation of table look-up, interpolation and manual calculation which are complicated and have low precision. Background technique [0002] Using the true azimuth of a celestial body (such as the sun) as the reference azimuth for calibrating pointing equipment is a common method used by surveyors such as captains and calibrators. If there is an error in the plus or minus sign, even if you use a computer or an ordinary calculator, it cannot meet the digital communication needs of modern intelligent systems. Contents of the invention [0003] In order to change the cumbersome, tense, time-consuming, and error-prone manual calculation tabulation of the current sun orientation, provide a method that combines the true orientation of the sun with the position attribute, date, and time attribute of the ob...

Claims

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Application Information

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IPC IPC(8): G01C17/34G01C21/02G04B49/00
Inventor 戴耀存卢冠钟庄钠
Owner ZHEJIANG INST OF COMM
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