| 摘要 |
FIELD: instrumentation.SUBSTANCE: device to measure pressure and rate of its change consists of a flow pneumatic channel 1 comprising two anemosensitive elements 2, 3 for measuring the pressure change rate and connecting an anechoic chamber 4 to a gas-dynamic unit, a microsupercharger 5 with an electric drive, measuring 6 anemosensitive element, compensating 7 anemosensitive element, the first 8 and the second 9 forming nozzles, a channel 10 for pressure measurement, a channel 11 for pressure change rate measurement, a microcontroller 12 and unit 13 for information displaying. The measuring 6 anemosensitive element is installed in the pneumatic channel combining the outlets of the microsupercharger 3 upon the negative excessive pressure with the flow pneumatic channel 1. The compensating 7 anemosensitive element is installed in the static cavity 14 communicated with the flow pneumatic channel 1. The first 8 and the second 9 forming nozzles are mounted in the flow pneumatic channel 1 opposite to each other, the first 2 and the second 3 anemosensitive elements for pressure change rate measurement are installed respectively in the section of the nozzles. The first inlet of the channel 10 for pressure measurement is connected to the measuring 6 anemosensitive element and the second inlet - to the compensating 7 anemosensitive element. The first inlet of the channel 11 for pressure change rate measurement is connected to the second 3 anemosensitive element for pressure change rate measurement and the second inlet - to the first 2 anemosensitive element. The first input of the microcontroller 12 is connected to the output of the channel 10 for pressure measurement and the second input - to the output of the channel 11 for pressure change rate measurement, the microcontroller outputs are the first output being an output signal of the device by pressure, the second output being an output signal of the device by pressure change rate, which are connected to the input of the information display system 13, and the third output of the microcontroller is connected to the input of the control unit 15 with the output of the latter being connected to the controlling input of the microsupercharger 3.EFFECT: improved accuracy.4 cl, 1 dwg |
