| 摘要 |
The variable inductance type position sensor system comprises a rotor target (104) of ferromagnetic material fixed on a rotary shaft (110) and a stationary magnetic circuit (103) which is placed around the rotor target (104). The stationary magnetic circuit (103) comprises a sensing element (131) located along an axis X-X' in front of the rotor target (104) while leaving an air gap. The sensing element (131) receives an induction coil (105). A first end of the induction coil (105) of the sensing element (131) is connected to a first end (198) of an AC voltage source (101), and a second end of the induction coil (105) of the sensing element (131) is connected to a connection point (199), which is connected to a second end (181) of the AC voltage source (101), the second end (181) of the AC voltage source (101) being connected to a reference voltage. A detector device (162) is interposed between the connection point (199) and the second end (181) of the AC voltage source (101) in order to deliver information about the magnitude of the current flowing between the connection point (199) and the second end (181) of the first AC voltage source (101), this information representing the value of a modification x to the width of the air gap that presents a predetermined nominal value go along said first axis X-X'. |
