| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: whole measuring range of medium movement acceleration is divided into individual sections and acceleration is converted to pressure. Then, section is chosen as zero (current) section on which force impact from acceleration is compensated with analogue feedback. Acceleration values on other sections are measured by means of pressure values on this current section; for balance of inertia mass at increment of acceleration the additional feedback compensation is input and output for each section as per commands of upper and lower values of pressure thresholds, and code of the section is formed. Pressure is converted to frequency, pulses on the appropriate sections is summed, integrated, and velocity value is fixed. Medium movement speed measuring device includes sensitive unit made in the form of membrane adder with differential nozzles and inertia mass, power amplifier the input of which is connected to outputs of membrane adder. Fluid frequency generator connected to power amplifier and through the output to fluid frequency metre is introduced in addition into the device. Also, reversible fluid metre of acceleration increment sections is introduced, the outputs of which are connected to fluid triggers of sections through their AND elements and the inputs of which are connected to fluid pulsers of threshold triggers. To the device there introduced as per the number of sections in the range of acceleration are feedback chambers in adder and valves actuating those chambers, the outputs of which are connected to stabilised pressure source and the inputs of which are connected to fluid triggers of sections, and outputs of fluid frequency metre and reversible metre are connected to computer. ^ EFFECT: higher measuring accuracy of medium movement velocity. ^ 2 cl, 1 dwg |
