Dynamic response characteristics of vacuum pressure measurement system with pneumatic long-thin tube
| Autor: | Longlong Gao, Hu Jinlong, Baoren Li, Jingmin Du |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Vacuum pressure System of measurement Response characteristics 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Pressure sensor Surfaces Coatings and Films 0103 physical sciences Heat transfer Tube (fluid conveyance) Loudspeaker 0210 nano-technology Instrumentation Mathematical simulation |
| Zdroj: | Vacuum. 171:108995 |
| ISSN: | 0042-207X |
| DOI: | 10.1016/j.vacuum.2019.108995 |
| Popis: | The pneumatic long-thin tube between a measured pressure source and pressure sensor is a key component of a vacuum pressure measurement system (VPMS). The dynamic response characteristics of a pneumatic long-thin tube significantly affects the accuracy of the VPMS. This paper presents a mathematical model of the pressure propagation in a VPMS. The mathematical model accounts for the effects of fluid viscosity and heat transfer. A method for testing dynamic response characteristics of the VPMS is proposed. The sinusoidal vacuum pressure signal source was generated by a device consisting of a closed chamber and a loudspeaker. A series of tests were carried out using pneumatic long-thin tube with diameters of 2 and 3 mm, lengths of 100 and 300 mm, and initial vacuum pressures of 3.3 and 30 kPa. The comparison of the experimental and mathematical simulation results demonstrated that the mathematical model could accurately describe the dynamic response characteristics of the VPMS within certain frequency and pressure ranges. The results of this paper have general implications for the design and analysis of the VPMSs. |
| Databáze: | OpenAIRE |
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