Gas Density Sensor Based on PSoC5

A significant part of all types measurements performed in modern industry and science are gas, liquid or other media. This is important because there many processes where you need to clearly control the parameters environment - pressure, density, etc. The object research MEMS gas density sensors. subject eliminate shortcomings existing similar systems, increase accuracy measurement range measured pressures safe operation system critical conditions. aim work implement a sensor based on crystal, using auxiliary functional modules, monitor obtain sophisticated device that will be easy use. Several prototypes considered, miniature cantilever used as sensitive element. disadvantage such systems depends support pressure. Also prototype [3] it noted time one sample lasts about 2 minutes, which very significant. In course methods determination thermophysical with use primary converters technology made structure heater, element passive components analyzed. Calculations for also described. implementation complete, measuring programmable crystal Cypress PSoC 5 considered. allows us complex almost this has its certain set already built-in analog digital units. main advantage PSoC5 ability dynamically reconfigure during operation. That is, having elements, we can build number different schemes without stopping process. Designer software configures units DAC, iDAC, ADC. configuration these connection them external thermistors thermal heater given. Simulation given scheme carried out results graphic kind resulted. principle dependence temperature attenuation environment. idea compare phase shift between two harmonic signals. One signal reference signal, recorded by after wave passes through medium. Since pass delay then phases shifted. Therefore, difference signals depend medium heat passes. conclusion both advantages lacks offered method have been proved basis comparison known