Aerial craft oil mass measurement error correcting method

Abstract

The invention relates to the technical field of automatic liquid level and object level measuring, more particularly to a four-wire system radio-frequency admittance liquid level and object level meter and a method thereof. The meter comprises an LC oscillatory circuit, a bridge circuit, a prime amplifying circuit, a detection synchronous circuit, a detection circuit, a signal amplifying circuit, an MSP430F147 single chip microcomputer, a 93C46EEPROM memory circuit, a liquid crystal display, an AD420 electric current output circuit, a keystroke input circuit, an electric relay output circuit and a continuous liquid level control automatic gearshift circuit. The signal of material level variation subjected to detection and integration is converted to a DC signal, transmitted to a CPU processor for processing, and then transmitted to the liquid crystal display for displaying. Comparing with the capacitance radio-frequency admittance and two-wire system radio-frequency admittance, the inventive product has great advantages in sales for chemical industry and sewage treatment industry, and the debugging and maintenance costs are reduced. The inventive product is irreplaceable in position measurement in high pressure high temperature and narrow space.

Description

technical field [0001] The invention belongs to the technical field of aviation, and in particular relates to a method for correcting an aircraft fuel quantity measurement error. Background technique [0002] For UAVs with a relatively long battery life, relatively complete intelligence information can be collected, and more detailed information can be provided than satellites, and the flight trajectory is much more flexible than space-based satellite systems. Machines have become the key development goals of various countries. [0003] Due to the characteristics of this type of UAV, it is determined that it must carry a large amount of fuel to meet the mission requirements. For example, the large-scale high-altitude long-range UAV "Global Hawk" in the United States has a total take-off weight of 11612Kg and a maximum fuel weight of 6577Kg, and the fuel weight accounts for more than 56% of the weight of the whole aircraft; , the total take-off weight is 3175Kg, the maximum...

AI Technical Summary

Problems solved by technology

However, these two methods have their inherent disadvantages, and it is difficult to obtain accurate remaining oil in the actual use process.

The first method requires a large number of ground tests, which not only consume a lot of financial resources and manpower, but also the aircraft is flying in the air, and it is difficult to test the engine working conditions of various states through ground experiments. It is impossible to obtain very comprehensive data in this way; and although the fuel consumption rate of the engine in various situations can be obtained through calculation, according to the current research situation, the calculation results are not very accurate, and it is easy to use the calculation results for a long time. large cumulative error

Although the second method is easier to implement, the fuel quantity sensor is more sensitive to environmental factors. Factors such as fuel quality and temperature will cause large errors in the measurement results, and the attitude of the aircraft and the shape of the fuel tank will also cause jumps in the measurement results. cause flight safety hazards

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