Purpose The purpose of this paper is to investigate measurement and regulation of saturated vapour height level in vapour phase soldering (VPS) chamber based on parallel plate capacitor and retaining a stable saturated vapour level above the boiling fluid, regardless of the quantity and size of assembled components. Design/methodology/approach Development and realisation of capacitance sensor that sensitively senses the maximum height level of saturated vapour above the boiling fluid in the VPS chamber was achieved. Methodology of measurement is based on capacitor change from single air to a parallel plate, filled with two dielectric environments in a stacked configuration: condensed fluid and vapour (air). Findings An easy air plate capacitor immersed in the saturated vapour above the boiling fluid can serve as a parallel plate capacitor owing to the conversion of the air to the parallel plate capacitor. A thin film of fluid between the two capacitor plates corresponds to the height of the saturated vapour, which changes the capacity of the parallel plate capacitor. Originality/value Introducing the capacitive sensor directly into the VPS work space allows to achieve a constant height level of saturated vapour. Based on the capacity change, it is possible to control the heating power. There is a lack of information regarding measurement of stable height of vapour in the industry, and the present article shows how to easily improve the way to regulate the bandwidth of saturated vapour in the VPS process.

中文翻译：

---

VPS室饱和蒸汽高度水平的测量与调节

目的本文的目的是研究基于平行板电容器的气相焊接 (VPS) 室中饱和蒸气高度水平的测量和调节，并在沸腾流体上方保持稳定的饱和蒸气水平，而不管组装的数量和大小如何。组件。设计/方法/途径 电容传感器的开发和实现实现了，该传感器灵敏地感测 VPS 腔室中沸腾流体上方饱和蒸汽的最大高度水平。测量方法基于电容器从单一空气到平行板的变化，以堆叠配置填充两种介电环境：冷凝流体和蒸汽（空气）。发现 一个简单的空气板电容器浸入沸腾流体上方的饱和蒸汽中，由于空气转化为平行板电容器，因此可以用作平行板电容器。两个电容器板之间的流体薄膜对应于饱和蒸汽的高度，这会改变平行板电容器的容量。原创性/价值 将电容式传感器直接引入 VPS 工作空间可以实现饱和蒸汽的恒定高度水平。根据容量变化，可以控制加热功率。业界缺乏有关测量稳定蒸汽高度的信息，本文将展示如何轻松改进 VPS 过程中调节饱和蒸汽带宽的方法。