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一、概述在某些气动测量仪表和气动装置的结构中,波纹管作为气容常与气阻(如管接头等)联在一起组成所谓阻——容结构式,如图1所示,并作为一次敏感元件而广泛使用,如对具有波纹管结构的压力表,它测量气压的过程也就是其中波纹管充气动作的瞬态过程,即当外界有一阶跃恒压(p_s)气体流输入(充气)时,首先是气体流通过与波纹管联结的气阻(管接头等)并被节流,然后向波纹管(气容)充气,使其容积发生变化而产生位移,通过机械结构得到指示压力的数
First, an overview In some aerodynamic measuring instruments and pneumatic devices in the structure, the bellows as a gas often with air resistance (such as pipe joints, etc.) linked together to form the so-called resistance - capacitance structure, as shown in Figure 1, and as For example, for a pressure gauge with a bellows structure, the process of measuring air pressure is the transient process in which the bellows is inflated. That is, when there is a stepwise constant pressure (p_s) gas flow input ), The first is the gas flow through the gas resistance (pipe joints, etc.) connected with the bellows and throttling, and then to the bellows (gas volume) inflated to change its volume displacement, the indicated pressure through the mechanical structure The number of