摘要:
An outer ring 3 is provided with the stator 7 of a resolver 2, and a ring member 4 with the rotor 8 of the resolver 2. The stator 7 comprises an annular core 9 and a winding 10 provided around the core 9. The ring member 4 is provided at a position opposed to the stator 7 with an eccentric cylindrical face serving as the rotor 8 and eccentric with respect to other outer peripheral surface of the ring member 4.
摘要:
A power steering apparatus includes a motor, a torque sensor, and a motor resolver. The motor generates an assisting force to reduce the steering force of the steering wheel. The torque sensor detects the steering torque of the steering wheel. The motor resolver detects the rotational angle of the motor. An electronic control unit (ECU) detects the absolute position of the steering wheel based on a detection signal Rt sent from a second resolver of the torque sensor and a detection signal Rm sent from a motor resolver. As a result, the cost is reduced and the absolute position of the steering wheel is accurately detected.
摘要:
A rotation detector designed to prevent line disconnection from being caused by an abrupt thermal change, comprising cores (10, 30) arranged inside a cylindrical housing (1), pins (15a, 15b; 35a, 35b, 35c, 35d) attached to the cores (10, 30) and connected to coils (13, 23) of the cores (10, 30), protruding from a notch (1a) of the housing (1), and a connection base (50) electrically connected to the outside via a lead wire (59) and fixed to the pins (15a, 15b; 35a, 35b, 35c, 35d).
摘要:
A bobbin, supporting a winding and intended to be disposed in a circular core, which core includes circular top and bottom core collars having first and second bores, respectively, and a cylindrical member maintaining the top and bottom core collars at a predetermined distance from one another, the first and second bores defining a core bore that is concentric with the rotation axis of the core, includes a spool that supports the winding, top and bottom bobbin collars coupled on either side of the spool, and protrusions disposed on the bobbin, the protrusions permitting the bobbin to be press fit into the circular core so as to prevent relative motion between the circular core and the bobbin. If desired, the protrusions can ensure that the centerline of the bore and the centerline of the bobbin are coincident. A rotary transformer and an inductor employing the bobbin are also described.
摘要:
To detect a difference between rotation angles of respective shafts by using non-contact type resolvers with high precision. In a steering rotation detector according to the present invention, a rotation angle of a first shaft of a steering wheel is detected by a first rotation detecting unit of a resolver, a rotation angle of a second shaft of front wheels side is detected by a second rotation detecting unit of a resolver, whereby a power steering with high precision is obtained.
摘要:
A method of localizing a device, medical or otherwise, within a three dimensional environment, the method comprising: (a) transmitting time varying magnetic fields from at least three transmitters, (b) receiving the transmitted electromagnetic radiation as induced voltage signals from at least one receiver mounted on or within said device, and (c) a processing scheme for processing said received voltage signals in order to extract position and orientation localization information for said device, said processing scheme including correction for conducting materials in the vicinity by the use of information gathered from at least three distinct transmission frequencies for each of said transmitters.
摘要:
An inductive measuring transducer having bodies that are movable one relative to the other, one of such bodies (sensor component 2) comprising at least one inductive sensor (6) that produces an alternating magnetic field, and the other body (pickup component 1) comprising one or more inductive pickups into which the alternating magnetic field of the inductive sensor(s) (6) is/are injected, there being provided an electronic circuit (3) for supplying the inductive sensor (6) with an alternating current and a circuit for evaluating the output voltages of the measuring transducer, is characterized in that the pickup component (1) comprises a closed conductor loop (10) in which the one or more inductive sensors (6) of the sensor component (2) induce(s) a voltage so that a voltage curve independent of the position of the sensor component (2) relative to the pickup component (1) develops over the conductor loop (10), and that resistors (11) are connected along the conductor loop (10), which have their other ends connected one to the other in groups (12 . . . 15) so that voltages can be picked off from the connection points of the resistor groups that correspond to functions of the position of the sensor component (2) relative to the pickup component (1) and permit the position to be clearly determined, the position and value of the resistors (11) defining the functions of the position.
摘要:
A rotary position detector includes first and second members, the first member generating a magnetic field which spatially varies around the axis of rotation in a cyclic manner and the second member sensing the generated magnetic field. In response to the generated magnetic field, first and second signals are generated by first and second sensors respectively, which signals vary with the relative angular position of the first and second members and the relative angular position of the first and second members is determined from the first and second signals.
摘要:
An electronic caliper having a reduced offset position transducer that uses two sets of coupling loops on a scale to inductively couple a transmitter winding on a read head on a slide to one or more receiver windings on the read head. The transmitter winding generates a primary magnetic field. The transmitter winding is inductively coupled to first loop portions of first and second sets of coupling loops by a magnetic field. Second loop portions of the first and second sets of coupling loops are interleaved and generate secondary magnetic fields. A receiver winding is formed in a periodic pattern of alternating polarity loops and is inductively coupled to the second loop portions of the first and second sets of coupling loops by the secondary magnetic fields. Depending on the relative position between the read head and the scale, each polarity loop of the receiver winding is inductively coupled to a second loop portion of either the first or second set of coupling loops. The relative positions of the first and second loop portions of the first and second sets of coupling loops are periodic and dependent on the relative position of the coupling loops on the scale.
摘要:
A miniature coil assembly for transmitting or receiving magnetic waves comprises a plurality of coils wherein each coil has a respective axis. The coil assembly is assembled such that at least two of the axes are mutually linearly independent, and such that all of the plurality of coils are contained within a volume having a cross-sectional area less than 1.0 mm2. At least two of the coils are photolithographic coils.