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首先给出了以贮箱内气体为对象的一般热力学测量控制方程,完成气体及液体体积的计算;以贮箱系统为研究对象,建立了系统处于等温、绝热及非等温条件下的热力学模型,考虑了气体与液体、贮箱壁的传热传质等因素,得出了比较理想的测量模型。其次,对影响测量的系统误差进行了分析,建立了各种影响因素的误差模型,并提出了相应的修正措施。然后,给出了在现有技术水平下测量的最大误差,结果表明测量误差在贮箱总体积的1%以内。最后,对激励频率、体积改变量大小及测量设备等相关应用技术问题进行了分析讨论与合理设计。体积激励法是一种可满足测量精度和耗能要求的良好方法。
Firstly, the general thermodynamic measurement control equations for the gas in the storage tank are given, and the calculation of gas and liquid volume is completed. With the storage tank system as the research object, the thermodynamic model of the system under isothermal, adiabatic and non-isothermal conditions is established. Taking into account the gas and liquid, heat transfer and mass transfer tank wall and other factors, come to an ideal measurement model. Secondly, the systematic errors that affect the measurement are analyzed, the error models of various influencing factors are established, and the corresponding corrective measures are put forward. Then, given the maximum error measured at the state of the art, the results show that the measurement error is within 1% of the total volume of the tank. Finally, the application of the excitation frequency, the size of the volume change and measurement equipment and other related technical problems were analyzed and discussed and reasonable design. Volume excitation method is a good method to meet the measurement accuracy and energy requirements.