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在充分调研国内外管道流量和压力检测技术的基础上,提出了基于非接触式的超声波液压系统流量和压力统一测量的检测方法。该方法克服管道壁厚影响,而且有效地消除系统误差,达到了较高的精度。根据声学方面和流体力学的相关知识,利用液压系统压力变化引起油液声速变化这一物理特性,并结合时差法超声波流量计的检测原理,证明了超声波流量计检测方法能够有效的对管道压力进行测量,具有重要的实用价值。
Based on the full investigation of pipeline flow rate and pressure detection technology both at home and abroad, a unified measurement method of flow and pressure based on non-contact ultrasonic hydraulic system is proposed. The method overcomes the influence of pipe wall thickness, and effectively eliminates systematic errors and achieves higher precision. Based on the related knowledge of acoustics and fluid mechanics, the physical characteristics of the change of the velocity of the oil liquid caused by the pressure change of the hydraulic system are utilized, and the detection principle of the ultrasonic flowmeter by the time difference method is proved that the ultrasonic flowmeter detection method can effectively carry out the pipeline pressure Measurement, has important practical value.