Design method for pressure increasing and decreasing speed measurement apparatus

Abstract

The invention discloses a design method for a pressure increasing and decreasing speed measurement apparatus. The work principle is as follows: a pressure sensor is taken as a detection end for detecting pressure to be measured, converting a physical amount into electric signals and providing signals for subsequent digital measurement; if the work principles and the models of sensors are different, the types and the scope of the output electric signals are also different; the electric signals of the pressure sensor are converted to a signal type and a scope which can be processed in a subsequent circuit through a signals conditioning circuit; the signals are sampled and converted through an analog / digital converter, and an analog quantity is converted into a digital quantity which can be recognized by a microprocessor; and the microprocessor, after obtaining the digital quantity, carries out resolving to obtain a pressure value and a pressure increasing and decreasing speed value, displays a result on a display screen, sends measurement results to a host computer for data communication, and modifies parameters so as to realize online adjustment of display sensitivity.

Description

technical field [0001] The invention belongs to the technical field of industrial measurement, and relates to a design method of a device for measuring pressure rising and falling speeds. Background technique [0002] The lifting speed gauge can reflect the magnitude and direction of the pressure rising and falling speed. The principle of the discrete speedometer: the instrument casing is sealed, and there is an open bellows inside the watch. The inner cavity of the bellows is communicated with the static pressure by a thick pressure transmission tube, and the outside of the bellows (that is, the inner cavity of the instrument) passes through a The capillary is also connected to the static air pressure. In this way, when the aircraft ascends or descends, the pressure in the bellows basically changes with the change of altitude. At that time, the air pressure outside the bellows, that is, in the watch case, changes slowly due to the blocking effect of the capillary, resultin...

AI Technical Summary

Problems solved by technology

However, the pressure rise and fall speedometer has a large volume, heavy weight, fixed installation position, and it is difficult to obtain accurate readings during dynamic changes. If the pressure exceeds the limit, it will cause irreversible damage

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