| 摘要 |
PURPOSE:To obtain a flow rate converting apparatus with various kinds of the measuring range by forming holes in a pressure receiving surface of a pressure receiving plate and selecting the diameter or the number of the holes, or selecting the spring constant of the pressure receiving plate, thereby to regulate the measuring range of the flow rate. CONSTITUTION:Holes 11A are formed in a pressure receiving surface of a pressure receiving plate 11. The diameter or the number of the holes 11A is suitably selected. Accordingly, the resistance value to the flow pressure of the pressure receiving plate 11 can be changed. In other words, when the holes 11A are not, formed, the resistance value is maximum, and therefore the pressure receiving plate 11 can be shifted to the resulating amount even with a small flow rate, and the apparatus becomes highest in its sensitivity. As the diameter or the number of the holes 11A is increased, the resistance value becomes smaller. Therefore, the shifting amount of the pressure receiving plate 11 is difficult to reach a regulating value even with a large flow rate, and the apparatus can measure a large flow rate. In this manner, the main body of the same shape can be used to obtain various kinds of devices of different full scales. |
