| 摘要 |
PROBLEM TO BE SOLVED: To detect the remaining amount of powder in a container with high precision and to detect how much powder is left.SOLUTION: The present invention relates to a power detection device that detects the remaining amount of powder with flowability in a container, the power detection device comprising: a magnetic flux sensor 10 which outputs a signal of frequency corresponding to a state of magnetic flux passing through an opposite space; a diaphragm 201 which is arranged in the container and opposed to the magnetic flux sensor 10 through a housing of the container, vibrates in opposition directions, and is made of a material influencing the magnetic flux; and an agitation member 205 which vibrates the diaphragm 201. The power detection device acquires a count value of an oscillation signal of the magnetic flux sensor 10 in predetermined cycles, calculates a value indicative of secular change in vibration state of the diaphragm 201 based upon variation in count value which changes with vibrations of the diaphragm 201, and finds the remaining amount of powder corresponding to a calculation result.SELECTED DRAWING: Figure 22 |
