| 摘要 |
PURPOSE:To maintain pressure within specified range by remote control by comparing output of a pressure sensor connected to a pressurizing cylinder by a comparator and regulating pressure in the cylinder. CONSTITUTION:A solenoid valve 5 for feeding and releasing air pressure and a pressure sensor 3 are connected to a pressurizing cylinder 1, and output of the sensor 3 is connected to a comparator 10. Pressure of the cylinder 1 is detected, and the detected value is compared by a comparator 10 with set upper limit and lower limit values, and a solenoid valve is operated. When the pressure is large, air in the cylinder is discharged into the atmosphere and when the pressure is small, air is supplied from an air source 4. Thus, pressure in the cylinder 1 is kept constant at all times by remote control. |
