| 摘要 |
PURPOSE:To reduce measuring errors, by computing the change in weight before and after the timing when the increase in articles is detected, obtaining the number from the preset amount of change in unit weight, and adding the result as the increased number. CONSTITUTION:At every time when an article passes between a light projector 2-A and a light receiver 2-B, the light receiver 2-B generates an electric signal (e). The signal is inputted to a control operator part 6 from a waveform shaping part 3 through a delay circuit part 4. Based on a measurement starting command (a) from the control operator part 6, a weight measuring part 5 measures the weight and sends the measured result to a memory part 7. The control operator part 6 reads a previous weight WA and a new weight WB out of the memory part 7 and performs the operation of the increased wieght DELTAW=WB- WA. Then, the magnitudes of DELTAW and DELTAWL and DELTAWH are compared, and the number corresponding to DELTAW is obtained. A count up pulse (h) is generated. The new weight WB is regarded as the previous weight and stored as the previous weight WA. The counted result of a counter part 8 is numerically displayed by a display part 9. |
