Quasi-δ Function Calibration Of Dynamic Characteristic Of High-Pressure Transducer

This paper has discussed the current sensor calibration technologies around the world, and presented quasi-δcalibration theory and technique for resolving high-range transducer dynamic sensitivity test problem in high-pressure transducer dynamic characters tracing to source calibration problems. This research can realize dynamic parameters transfer from static parameter norm to dynamic parameter that is from National Measurement Center, which can supply accurate and reliable dynamic reference for national defence dynamic test.Analyzed the trait of the quasi-δsignal and the advantages of quasi-δcalibration, it expressed detailedly the theory about the quasi-δsignal generator, the factors that would affect the impulse width of the quasi-δsignal, and the design of the Hopkinson bar parameters and the size of the oil cavity. The paper has explained every part of the calibration system.It discussed the calibration experiments of the Kistler6215Q02 sensor, analyzed and improved the calibration device based on the experiments, analyzed the experiment data and simulated the calibration process. It also calibrated the sensor which realized the tracing around the 0 Hz with the quasi-δimpulse straight character from 0 Hz to some frequency and applied it to the sensor dynamic character calibration.The innovation here is: (1) dynamic calibrated the sensor with the quasi-δsignal generated from Hopkinson bar for the first time; The narrower the impulse width of the quasi-δsignal, the wider the straight part of the impulse signal spectrum, and it would get more kinds of frequencies response;(2) used a liquid ( glycerin) whose wave loss is little. Give it some pre-pressure, and the sensor would get high static pressure, which can increase the calibration pressure value without damage the piezoelectric components of the sensor.