A sensor includes a permanent magnet mounted on a shaft, a magnetic yoke, a magnetism collecting ring, a circuit board, and a sensor housing through which the shaft is inserted. The sensor housing has a box-shaped accommodating chamber accommodating at least the circuit board via an opening that opens in a direction crossing an axial direction of the shaft. A reinforcing member connecting two wall surfaces of the accommodating chamber that face each other in the axial direction of the shaft is provided in the accommodating chamber.

A torque sensor unit includes two magnetic angle sensors capable of detecting absolute rotation angles of a shaft member which indicate a twist angle of the shaft member when the shaft member is twisted. The shaft member has two end portions exposed to outside so that the shaft member can be connected at the two end portions to shaft-forming parts of a device.

A torque sensor includes an input rotation component, which rotates with a steering column input shaft and is provided with a first conducting part, an output rotation component which rotates with a steering column output shaft and is provided with a second conducting part, and an electromagnetic carrier positioned in a positionally fixed manner and provided with a magnetic field generating component and a magnetic field detection component. The magnetic field generating component generates a magnetic field penetrating the first conducting part and the second conducting part, the magnetic field detection component detects a change in the magnetic field caused by a change in the positions of the first and second conducting parts in the magnetic field when the steering column is under torsional stress, and the steering torque is determined on the basis of the detected change in the magnetic field.

A rotation transmission device having a high torque measurement resolution is provided. The rotation transmission device is provided with: a rotary-shaft unit (6) having a first and second rotary shaft (13, 14) combined so as to be coaxial and such that the end sections thereof can rotate relative to each other and a torsion bar (15) that is provided on the inner-diameter side of the first and second rotary shafts so as to be coaxial therewith, has one end section connected to the first rotary shaft (13), and has the other end section connected to the second rotary shaft (14); a first gear (7) fastened to the outer peripheral surface of the first rotary shaft (13); a second gear (8) fastened to the outer peripheral surface of the second rotary shaft (14); a coupling shaft (9) provided on the inner-diameter side of the torsion bar (15) so as to be coaxial therewith, having one end section connected to one rotary shaft (13), and having the other end section protruding from an end of the torsion bar (15) in the axial direction; a first encoder disposed and fixed on the other end of the coupling shaft (9) so as to be coaxial with the first rotary shaft (13) and having a first detected section (39); a second encoder fastened on the other end of the second rotary shaft (14) so as to be close to the first encoder and having a second detected section (40); and a sensor unit having at least one sensor (42a, 42b) that faces the first and second detected sections (39, 40).

A magnetic torquer sensor for a steering system includes a magnetic unit, a magnetism-collecting unit, and a magnetic sensing element. The magnetic unit has a magnet ring. The magnetism-collecting unit has an inner magnetism-collecting ring and an outer magnetism-collecting ring. The inner magnetism-collecting ring has inner magnetism-collecting portions. The outer magnetism-collecting ring has outer magnetism-collecting portions. The outer magnetism-collecting portions and the inner magnetism-collecting portions are arranged alternately. The inner magnetism-collecting portions have their inner surfaces spaced from the magnet ring by a predetermined interval and level with inner surfaces of the outer magnetism-collecting portions. The magnetic sensing element is arranged at outer surfaces of the inner and outer magnetism-collecting rings for sensing magnetic-field variation between the inner and outer magnetism-collecting rings when they rotate with respect to the magnet ring. Thereby, the steering system provides good linearity.

A magnetic shield includes a divided portion divided into a plurality of parts before attachment to a sensor device. The divided portion is integrated by bringing the plurality of parts close to or in contact with each other during the attachment to the sensor device. The divided portion in an integrated state includes a first shield portion that surrounds a body of a magnetic flux collecting ring from an outer side in a radial direction, and a second shield portion that surrounds a magnetic flux collecting portion of the magnetic flux collecting ring together with a magnetic sensor to extend outward in the radial direction from the first shield portion.

A torque detection apparatus includes a magnetic element that outputs a signal corresponding to a magnetic flux from a magnetic circuit including a magnetic yoke. The torque detection apparatus further includes a signal retrieval member electrically connected to the magnetic element, and a unit housing formed of resin and molded integrally with the magnetic element and the signal retrieval member so as to cover the magnetic element and the signal retrieval member. The unit housing includes a body portion provided with an internal space in which the magnetic yoke is housed, and a connector portion provided with an internal space in which an end of the signal retrieval member exposed from the resin is disposed. In the unit housing, a communication path is formed through which the internal space is in communication with the internal space.

An electric bicycle central shaft torque sensing system, comprising a central shaft, a strain sleeve, a pedalling force output portion, a torque sensor and a five-way piece, one end of the strain sleeve being fixed on the five-way piece via a bearing and connected to the pedalling force output portion, another end being sleeved on the central shaft and fixedly connected thereto, an inner surface of the strain sleeve fitting with an outer surface of the central shaft, an outer surface of the strain sleeve being adhered to the torque sensor, the torque sensor transmitting a signal to a controller via a signal transmitter, the controller controlling motor output. The present invention prevents the current widespread phenomenon of unbalanced left/right foot detection during measurement by a torque sensing system. Measured radial torque accurately reflects the pedalling force, and a sprocket is driven via the strain sleeve whether the left foot or the right foot is pedalling, thereby ensuring smooth riding and increasing riding comfort.

A resistance apparatus for exercise equipment includes a resistance adjusting unit and a sensor unit. The resistance adjusting unit includes an adjusting member, a tubular sleeve located above the adjusting member, an adjusting shaft disposed in the tubular sleeve. A first threaded nut is pivotally mounted to the adjusting member and threadedly connected to the adjusting shaft. The sensor unit has a moveable member, a second threaded nut, a first sensing member and a second sending member. One end of the moveable member is pivotally mounted to the adjusting Member. The second threaded nut is threadedly connected to the adjusting shaft and moveable member. The sensing members are disposed on the other end of the adjusting member and the moveable member, respectively. Thereby, a distance between the sensor and the sensing member is changed with respect to the corresponding movements of the first and second threaded nuts on the adjusting member and the moveable member for generating corresponding sensing signals.

Aspects of this disclosure relate to a magnetic sensor system for measuring any desired combination of measuring torque, rotation angle, and turn count of a shaft. The shaft may include two portions connected by a torsion element. The system can measure rotation angle using a magnetic target coupled to the shaft that produces a magnetic field that varies as a function of rotation angle. The system can measure torque applied to the shaft by measuring the difference in rotation angles between the two portions of the shaft and factoring in a torsion coefficient. The system can track a turn count of the shaft using a multi-turn sensor. The magnetic sensor system may be part of an electric power assisted steering (EPAS) system.