METHOD FOR DETERMINING THE FLOW CHARACTERISTICS (FC) OF JET FLOW SENSORS (JFS) Russian patent published in 2022 - IPC G01F25/00 

FIELD: measuring technology.

SUBSTANCE: method for determining the flow characteristics of jet flow sensors by drawing air from the atmosphere through three sensors installed in series and an exemplary micronozzle, fixing temperature, atmospheric air pressure, vacuum at the output of the first, second and third sensors, the output signal f₁ of the first sensor. The characteristics of the first sensor (1) are determined when two sequentially installed second (2) and third (3) sensors are connected in parallel to the first sensor, identical in characteristics to the first (1), and the third sensor (3) is installed to obtain a vacuum on the second sensor (2) equal to half of the vacuum on the first (1), at the same time: at the first stage, the air is drawn in such a way that the output signal f₁₁ of the first sensor (1) corresponds to the output signal f₁ of the first sensor (1) when testing the sensor with a exemplary micronozzle (4). Fix the output signals f₁₁, f₂₁ of the first (1) and second sensor (2), the vacuum at the output of the first ΔR₁₁ and the second ΔR₂₁ sensor, at the second stage, the air broach is set so that the output signal f₁₂ of the first sensor (1) becomes equal to the output signal f₂₁ of the second sensor (2) at the previous stage, output signals f₁₂, f₂₂ of the first and second sensors are fixed, at the Nth stage, the air broach is set so that the output signal f_1N of the first sensor (1) becomes equal to the output signal f_2N-1 of the second sensor (2) at the previous (N-1)-th stage, the output signals f_1N, f_2N of the first and second sensor are fixed, PX ΔP_1N = f (Q_1N) of the sensor is determined, where ΔP_1N = DR₁₁/2^(N-1) is the amount of vacuum at the output of the first sensor (1); Q_1N is the amount of flow through the first sensor corresponding to the output signal f_1N.

EFFECT: increase in the accuracy of determining the flow characteristics of jet flow sensors is achieved.

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