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Body axis system based oil level measuring method

A measurement method and coordinate system technology, which is applied in the direction of liquid level indicators for physical variable measurement, can solve the problems of large oil measurement errors and poor database accuracy, and achieve the effects of improving accuracy, reducing workload, and reducing errors

Inactive Publication Date: 2015-01-21
四川泛华航空仪表电器有限公司
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Problems solved by technology

[0004] The object of the present invention is to provide a stable, reliable, capable Improve the accuracy of fuel level measurement in flight, digitize the fuel level sensor based on the body coordinate system, query a more detailed database, and then improve the fuel level measurement method of measurement accuracy

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  • Body axis system based oil level measuring method
  • Body axis system based oil level measuring method
  • Body axis system based oil level measuring method

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Embodiment Construction

[0015] refer to figure 1 . According to the present invention, in the computer platform, a fuel quality characteristic database including attitude information is first established. In order to simplify the fuel quality characteristic database, create a straight line perpendicular to the XY plane and call it a virtual sensor; then sample the fuel quantity sensor through the measurement system to obtain the capacitance value of the fuel quantity sensor, and then solve figure 2 The oil immersion height of the oil quantity sensor shown is equivalent to a straight line for each oil quantity sensor in the measurement process. At the same time, through the installation position and oil level height of the oil quantity sensor, a virtual sensor linear equation based on the body coordinate system is established, and then through the layout The oil immersion height of the oil quantity sensor is greater than 3, and the oil immersion height of the oil quantity sensor can be obtained im...

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Abstract

The invention provides a body axis system based oil level measuring method which is stable and reliable and can improve the measuring accuracy. According to the technical scheme, the body axis system based oil level measuring method comprises the following steps of establishing a fuel oil quality character database of attitude information and a straight line which is perpendicular to an XY panel, wherein the straight line is called a virtual sensor; enabling oil measurement sensors in a measuring process to be equivalent to straight lines and meanwhile establishing a body axis system based virtual sensor straight line equation according to installation positions of the sensors; measuring immersion oil surface height through more than three linear capacitive type oil measurement sensors which are arranged at different positions, obtaining coordinates of three points in an oil surface in combination with oil surface angle measurement and obtaining an oil surface attitude angle and an oil surface equation; obtaining coordinates of an intersection point of the line and the surface through the oil surface equation and the virtual sensor straight line equation; representing corresponding relationships of the oil surface height, the oil surface angle and the fuel amount through the fuel quality characteristic database and finally obtaining an oil amount measuring result through the three-dimensional linear interpolation calculation.

Description

technical field [0001] The invention relates to a method mainly for measuring the fuel quantity of an aircraft having a tank with a relatively large cross-section. Background technique [0002] In the prior art, in order to describe the motion state of the aircraft, an appropriate coordinate system must be selected. For example, the position of the aircraft relative to the ground must use the ground coordinate system; the rotation of the aircraft is expressed by the body coordinate system. The three-dimensional orthogonal rectangular coordinate system fixed on the aircraft or aircraft that follows the right-hand rule is called the body coordinate system. Its origin is located at the center of gravity of the aircraft, the OX axis is located in the reference plane of the aircraft, parallel to the axis of the fuselage and points to the front of the aircraft, and the OY axis is vertical. On the reference plane of the aircraft and pointing to the right of the aircraft, the OZ ax...

Claims

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Application Information

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IPC IPC(8): G01F23/26
Inventor 孙忠湖
Owner 四川泛华航空仪表电器有限公司
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