| 摘要 |
PURPOSE:To enable an inexpensive and reliable measurement of a capacity of a gas bag, by a method wherein a capacity measuring device is constituted such that a change in height of the gas bag is measured by means of a rotary variable resistance level meter, and changes in width of the gas bag are detected using micro switches. CONSTITUTION:A suspension frame 1 of a gas bag 2 and a weight 4 are tied through a string 3, and a rotary variable level meter 5 measures a change in height. Micro switches 6 and 7 are mounted at supporting bars 8 and 9 positioned at a given distance, and detect a change in width. Signals from the micro switches 6 and 7 are sent to an OR circuit 11 via an AND circuit 10 togetherwith signals from the rotary variable level meter 5. When either signal in the AND circuit 10 or a signal I1 from the level meter 5 indicates the highest limit, the input valve of the gas bag 2 closes. This permits the reliable measurement of a flow-in amount of gas in the gas bag 2 and enables the prevention of the rupture of the gas bag. |
