Real-time simulation method for oil tank level based on capacitance liquid level meter

Abstract

The application relates to a real-time simulation method for an oil tank liquid level based on a capacitance liquid level meter, three capacitance liquid level meters are arranged in the oil tank, and an included angle alpha exists between the installation directions of the three capacitance liquid level meters, the angle of the included angle alpha satisfies 0 DEG < alpha < 90 DEG; a space plane is obtained according to three detection points of the three capacitance liquid level meters, and the section of the space plane to the model is a real-time liquid level simulation plane of the oil tank. The application can guarantee real-time and accurate monitoring of the oil quantity of an airplane in the flight process, and can avoid problems such as oil breakage, engine gear damage and airplane failure.

Description

Technical Field

[0001] This invention relates to the field of oil level measurement technology for aero-engine oil tanks, and in particular to a real-time simulation method for oil tank surface based on a capacitive level gauge. This method can realize real-time oil level measurement in multiple aircraft attitudes. Background Technology

[0002] Currently, there are two main methods for detecting oil level in the grease tank. One method involves designing a transparent observation window on the oil tank, allowing ground crew to check the oil level before takeoff. During flight, the oil level is not controlled, and oil consumption is estimated by calculating flight time. The second method involves adding an oil level indicator inside the oil tank. This indicator transmits the oil level to the flight control system in real time. However, this method does not consider the impact of aircraft attitudes such as roll, pitch, and acceleration on the oil level, and therefore cannot accurately reflect the real-time oil level under dynamic conditions. Both methods can lead to pilots misjudging the oil level, resulting in delayed responses to leaks or other malfunctions, and consequently, losses such as engine wear, mission interruptions, and mission delays. Summary of the Invention

[0003] The purpose of this invention is to provide a method for obtaining real-time oil level in multiple aircraft attitudes. Based on a capacitive level gauge and modeling simulation technology, it solves the technical problem of difficulty in obtaining real-time oil level in the case of oil sloshing during aircraft flight.

[0004] The technical solution of this invention is:

[0005] A real-time simulation method for oil tank liquid level based on capacitive level gauges is proposed. The oil tank is equipped with three capacitive level gauges, and the installation directions of the three gauges are mutually constitutive by an angle α, where 0° < α < 90°. The specific steps are as follows:

[0006] Step 1: The three capacitive level gauges transmit real-time level signals to the central processing system. The central processing system has a modeling function, which can model the oil tank and capacitive level gauges and obtain a model. In the model, three line segments simulate the three capacitive level gauges.

[0007] Step 2: Obtain three corresponding points on the three line segments based on the real-time measurement values ​​of the three capacitive level gauges;

[0008] Step 3: Obtain a spatial plane based on the three points. The cross-section of the spatial plane relative to the model is the real-time liquid level simulation plane of the oil tank.

[0009] Furthermore, the included angle α is 20° to 45°.

[0010] Furthermore, the three capacitive level gauges are installed on top of the oil tank.

[0011] Furthermore, the fuel tank has an irregular shape.

[0012] Furthermore, the central processing system is an airborne system, such as a flight control system, engine control system, or fuel system.

[0013] Furthermore, the three capacitive level gauges are installed at different locations in the oil tank.

[0014] Furthermore, the measured values ​​of the three capacitive level gauges are the immersion depths of each capacitive level gauge.

[0015] The advantages of this invention are: it can ensure that the lubricating oil level is monitored in real time and accurately during flight, thus avoiding problems such as lubricating oil shortage, engine gear damage, and aircraft malfunction. Attached Figure Description

[0016] Figure 1 Yes, this is a schematic diagram of the fuel tank structure;

[0017] Figure 2 This is a schematic diagram of the liquid level simulation plane;

[0018] Figure 3 This is another schematic diagram of the liquid level simulation plane;

[0019] Figure 4 This is a schematic diagram of the liquid level plane based on three oil tank models;

[0020] Among them: 100 - oil tank, 200 - one of the three line segments, 300 - the second of the three line segments, 400 - the third of the three line segments, 500 - the installation position of the three-point capacitive level gauge, 600 - spatial plane, A - one of the three points, B - the second of the three points, C - the third of the three points. Detailed Implementation

[0021] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described, and these examples should not be construed as limited to those set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0022] The provided embodiment is a method for real-time simulation of oil tank liquid level based on capacitive level gauges. The oil tank is equipped with three capacitive level gauges, and the installation directions of the three gauges are separated by an angle α between each pair, with the angle α being between 20° and 45°. The specific steps are as follows:

[0023] Step 1: The three capacitive level gauges transmit real-time level signals to the central processing system. The central processing system has a modeling function, which can model the oil tank and capacitive level gauges and obtain a model. In the model, three line segments simulate the three capacitive level gauges.

[0024] Step 2: Based on the real-time measurement values ​​of the three capacitive level gauges, obtain the corresponding three points A, B, and C on the three line segments;

[0025] Step 3: Obtain a spatial plane based on the three points. The cross-section of the spatial plane relative to the model is the real-time liquid level simulation plane of the oil tank.

[0026] The three capacitive level gauges are installed on top of the oil tank.

[0027] The fuel tank has an irregular structure, with a crescent-shaped or aerodynamic cross-section.

[0028] The central processing system is an airborne system, such as a flight control system, engine control system, or fuel system.

[0029] The three capacitive level gauges are installed at different locations in the oil tank.

[0030] The measured values ​​of the three capacitive level gauges are the immersion depths of each gauge.

[0031] Descriptions of various advantageous arrangements have been shown for illustrative and descriptive purposes, but such descriptions are not intended to be exclusive or limited to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. Furthermore, different advantageous examples may describe different advantages compared to other advantageous examples. One or more examples have been selected and described in order to best illustrate the principles and practical application of the examples, and to enable those skilled in the art to understand that this disclosure contains various examples with various modifications suitable for the particular intended use.

Claims

1. A method for real-time simulation of oil tank liquid level based on capacitive level gauge, characterized in that: The oil tank is equipped with three capacitive level gauges, and the installation directions of the three capacitive level gauges are separated by an angle α between each pair of gauges, where the angle α satisfies the condition: 0° < α < 90°; the oil tank has an irregular structure with a crescent-shaped cross-section; the specific steps are as follows: Step 1: The three capacitive level gauges transmit real-time level signals to the central processing system. The central processing system has a modeling function, which can model the oil tank and capacitive level gauges and obtain a model. In the model, three line segments simulate the three capacitive level gauges. Step 2: Obtain three corresponding points on the three line segments based on the real-time measurement values ​​of the three capacitive level gauges; Step 3: Obtain a spatial plane based on the three points. The cross-section of the spatial plane relative to the model is the real-time liquid level simulation plane of the oil tank.

2. The method for real-time simulation of oil tank liquid level based on capacitive level gauge according to claim 1, characterized in that... The included angle α is 20° to 45°.

3. The method for real-time simulation of oil tank liquid level based on capacitive level gauge according to claim 1, characterized in that... The three capacitive level gauges are installed on top of the oil tank.

4. The method for real-time simulation of oil tank liquid level based on capacitive level gauge according to claim 1, characterized in that... The central processing system is an airborne system.

5. The method for real-time simulation of oil tank liquid level based on capacitive level gauge according to claim 1, characterized in that... The three capacitive level gauges are installed at different locations in the oil tank.

6. The method for real-time simulation of oil tank liquid level based on capacitive level gauge according to claim 1, characterized in that... The measured values ​​of the three capacitive level gauges are the immersion depths of each gauge.

7. The method for real-time simulation of oil tank liquid level based on capacitive level gauge according to claim 4, characterized in that... The central processing system is a flight control system, an engine control system, or a fuel system.

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