PURPOSE: To measure automatically with high accuracy and non-contact a coefficient of hot linear expansion under high temperatures of ceramics by using two sets of a camera incorporating a solid-state scanning photodetector and combined with a lens system, and an illuminating device.
CONSTITUTION: Both ends of a sample 2 in a heating furnace 1 provided with a heating element 11 are illuminated by an illuminating device 9 from a vertical direction to an axis of the sample 2, a shadow part to which light is shut off by the sample 2, and a highlight part which light reaches directly are magnified and projected by a telephone lens 14 to a solid-state scanning photodetector surface of a camera 15 through a filter 13, and displacement is measured from a ratio of the highlight part L and the shadow part D. In this case, an output of each camera control unit 16 is added and outputted by a digital signal corresponding to the displacement. This output and an output of a thermometer 19 connected to a thermocouple 12 are inputted to a microcomputer 18 through an interface 17, a storage operation is executed, and a curve of relation between a temperature and a coefficient of thermal expansion is written by a digital plotter 20.
| JP2014055863 | GAS SENSOR AND FUEL CELL SYSTEM |
| JPH05248961 | DISPLACEMENT AMOUNT MEASURING DEVICE |
MIMURA TOSHISADA
NISHIKAWA KIHACHIROU
NISHIZAWA SHIYOUICHI
MATSUSHITA ELECTRIC IND CO LTD
| JPS5336262A | 1978-04-04 | |||
| JP32004795A |