PLUNGER POSITION DETECTING DEVICE AND SOLENOID VALVE
PROBLEM TO BE SOLVED: To detect the position of a plunger of a solenoid in an easy method. SOLUTION: The solenoid including a solenoid coil 30 and the plunger 20 employs, as a plunger detecting device which detects the position of the plunger, a convergence time detecting means of detecting a conver...
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| creator | FUJIWARA KAZUHIRO FUJISAKI SATORU |
| description | PROBLEM TO BE SOLVED: To detect the position of a plunger of a solenoid in an easy method. SOLUTION: The solenoid including a solenoid coil 30 and the plunger 20 employs, as a plunger detecting device which detects the position of the plunger, a convergence time detecting means of detecting a convergence time up to the convergence of a back electromotive voltage generated when the solenoid coil is powered off on a predetermined threshold, a self-inductance calculating means for calculating the self-inductance of the solenoid based upon the convergence time detected by the convergence time detecting means, and a position calculating means for calculating the position of the plunger based upon a value of the self-inductance obtained by the self-inductance calculating means. Consequently, the position of the plunger can be detected with high accuracy by only mere detection processing and calculation processing while the structure is made simple, compact in size, low in cost, and so on. COPYRIGHT: (C)2010,JPO&INPIT |
| format | Patent |
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SOLUTION: The solenoid including a solenoid coil 30 and the plunger 20 employs, as a plunger detecting device which detects the position of the plunger, a convergence time detecting means of detecting a convergence time up to the convergence of a back electromotive voltage generated when the solenoid coil is powered off on a predetermined threshold, a self-inductance calculating means for calculating the self-inductance of the solenoid based upon the convergence time detected by the convergence time detecting means, and a position calculating means for calculating the position of the plunger based upon a value of the self-inductance obtained by the self-inductance calculating means. Consequently, the position of the plunger can be detected with high accuracy by only mere detection processing and calculation processing while the structure is made simple, compact in size, low in cost, and so on. 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SOLUTION: The solenoid including a solenoid coil 30 and the plunger 20 employs, as a plunger detecting device which detects the position of the plunger, a convergence time detecting means of detecting a convergence time up to the convergence of a back electromotive voltage generated when the solenoid coil is powered off on a predetermined threshold, a self-inductance calculating means for calculating the self-inductance of the solenoid based upon the convergence time detected by the convergence time detecting means, and a position calculating means for calculating the position of the plunger based upon a value of the self-inductance obtained by the self-inductance calculating means. Consequently, the position of the plunger can be detected with high accuracy by only mere detection processing and calculation processing while the structure is made simple, compact in size, low in cost, and so on. COPYRIGHT: (C)2010,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ACTUATING-FLOATS BASIC ELECTRIC ELEMENTS BLASTING COCKS DEVICES FOR VENTING OR AERATING ELECTRICITY ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INDUCTANCES LIGHTING MAGNETS MECHANICAL ENGINEERING SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TAPS THERMAL INSULATION IN GENERAL TRANSFORMERS VALVES WEAPONS |
| title | PLUNGER POSITION DETECTING DEVICE AND SOLENOID VALVE |
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