Apparatus for measuring height of aircraft, and method thereof

Abstract

The invention discloses an apparatus for measuring the height of an aircraft, and a method thereof. The apparatus includes a baroceptor, an instrument amplifier, a digital-to-analog conversion circuit, a filter circuit, a microprocessor and a power module; instrument amplifier is connected to the output end of the baroceptor, the filter circuit is connected to the output end of the baroceptor, and the baroceptor acquires change information of the pressure with the height and outputs a first voltage; the first voltage is amplified by the instrument amplifier, the amplified first voltage is filtered by the filter circuit, and the filtered amplified first voltage is output; the digital-to-analog conversion circuit converts a digital voltage value corresponding to the current pressure plane height of the aircraft to a reference voltage; the instrument amplifier amplifies a difference between the first voltage and the reference voltage and then outputs a second voltage; and the microprocessor processes the filtered first voltage and the filtered second voltage, and then outputs the current height of the aircraft. The apparatus and the method have the advantages of reduction of the height measurement cost of a missile flight control process,, improvement of the height measuring resolution and accuracy, simple circuit and low power consumption.

Description

technical field [0001] The invention belongs to the technical field of aircraft control, and more particularly relates to a device and method for measuring the altitude of an aircraft. Background technique [0002] Altitude is one of the key factors that need to be referenced in the flight control process of the projectile. The altitude measurement of the missile is mainly measured by the radio altimeter, but the height measured by the radio altimeter is the height of the projectile relative to the ground surface, not relative to the standard sea level. plane height, and radio altimeters are expensive. The barometric altimeter can also be used for altitude measurement, but the barometric altimeter is used to measure the altitude directly. Due to the fast flight speed of the missile and the high data sampling frequency, when the computer collects the air pressure signal, it is limited by the calculation period and the number of digits of analog-to-digital conversion, and the ...

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Problems solved by technology

[0003] Aiming at the defects of the prior art, the object of the present invention is to provide a device and method for measuring the height of an aircraft, aiming at solving the problems of high cost of missile height measuring device and low accuracy and resolution of barometric altimeter for height measurement

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