Development of static and total pressure sensors based on optical measurement rulers

Abstract

Among the currently developed multifunctional meters of aerodynamic parameters, the most widely used in aviation at the present time are frequency sensors of full, static pressure and temperature of the blocked air flow, which have high accuracy and functional reliability. However, frequency pressure sensors have a number of disadvantages. Modern pressure sensors for the altitude and speed parameters measurement have a measurement error of up to 0.01 % of the operating pressure range. The article deals with the problem of developing a static and total pressure sensor, the principle of operation of which is based on the use of the optical method of information conversion. A significant novelty of the proposed sensor is the use of optical measurement rulers as secondary converters, with the help of which it is possible to convert the spatial distribution of the light flux into an electrical signal. The proposed pressure sensor, in comparison with its analogues, has significantly smaller weight and size parameters, and energy consumption is reduced by more than an order of magnitude, and, in addition, the influence of vibrations and shocks on the measurement accuracy is reduced.