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Capacitance meter

An electrostatic capacitance type, liquid level gauge technology, used in liquid level indicators, liquid/fluid solids measurement, liquid level indicators for physical variable measurement, etc.

Inactive Publication Date: 2013-05-01
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In this way, when a large amount of static electricity is charged, the fuel is sufficiently capable of igniting when a discharge occurs, so there is a possibility that the fuel may ignite due to sparks generated along with the discharge
The electrical charge that may become the ignition source may not comply with the US Federal Aviation Regulations (FAR25.981), so there is a problem that the above-mentioned fuel gauge is difficult to apply to the fuel tank of an aircraft

Method used

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Examples

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Embodiment Construction

[0048] refer to Figure 1 to Figure 9 One embodiment of the present invention will be described.

[0049] figure 1 It is a perspective view showing the main wing of the aircraft partially cut away.

[0050] The main wing 1 includes an upper skin 3 , a lower skin 5 , a front spar 7 , a rear spar 9 , and a plurality of ribs 11 .

[0051] The upper surface layer 3 and the lower surface layer 5 are thin plates that form the shape of the main wing 1 and also serve as the aerodynamic surface. The front spar 7, the rear spar 9 and the stringer (not shown) all bear the tension acting on the main wing 1 part of the load and compression load.

[0052] Such as figure 1 As shown, the front spar 7 and the rear spar 9 are structural members extending in the wing length direction of the main wing 1 , and are members disposed between the upper skin 3 and the lower skin 5 .

[0053] Between the front spar 7 and the rear spar 9 , a plurality of stringers as auxiliary members extending in the...

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PUM

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Abstract

Provided is a fuel oil gauge (15), comprising: a columnar interior structural body (27) formed from an insulator; a hollow cylindrical exterior structural body (23) formed from an insulator, which is positioned on the exterior circumference side of the interior structural body (27) around the total perimeter thereof with a gap therebetween; an interior electrode (29) which is affixed to the exterior circumference face of the interior structural body (27); and an exterior electrode (25) which is affixed to the interior circumference face of the exterior structural body (23). The fuel oil gauge (15) measures capacitance between the interior electrode (29) and the exterior electrode (25), and detects the level of fuel present between the interior electrode (29) and the exterior electrode (25). The exterior structural body (23) further comprises a plurality of exterior side through holes (31) that allow electrical charge to move from the exterior circumference face thereof to the exterior electrode (25).

Description

technical field [0001] The invention relates to an electrostatic capacitance type liquid level gauge. Background technique [0002] In transportation equipment such as an aircraft, an electrostatic capacitance type liquid level gauge is widely used as a fuel gauge for detecting the remaining amount of fuel in a fuel tank. [0003] This fuel gauge has two cylindrical electrodes arranged so that fuel can freely enter between them, and detects the remaining amount of fuel by measuring the electrostatic capacitance between the electrodes. [0004] Conventionally, for example, this electrode is made of a metal that also serves as a structure as disclosed in Patent Document 1. [0005] In recent years, in the field of transportation equipment such as aircraft, composite materials such as reinforced plastics have been used for components such as wings and fuselages of aircrafts for the purpose of reducing weight and improving performance based on weight reduction. As an important...

Claims

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Application Information

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IPC IPC(8): G01F23/26
CPCG01F23/268G01F23/263G01F23/266
Inventor 山口弘晃神纳祐一郎
Owner MITSUBISHI HEAVY IND LTD
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