| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid surface level detector having a simple configuration using only one kind of sensors.SOLUTION: In a liquid surface level detector, (A) a liquid level is detected on the basis of a differential value D[i], the differential value D[a] other than the differential value D[j+1] and a liquid level detection reference information H[a] when a mark of the differential value D[j] out of a plurality of differential values D[i] is negative, and a mark of the differential value D[j+1] out of the plurality of differential values D [i] is positive, (B) the liquid level is detected on the basis of the differential value D[b] other than the differential value D [1] and a liquid level detection reference information H[b] when a mark of the differential value D[1] is positive, and (C) the liquid level is detected on the basis of the differential value D[c] other than the differential value D[N-1] and a liquid level detection reference information H[c] when a mark of the differential value D[N-1] is negative. |
