Abstract:
A method and a device (1) are provided for determining a torque of a transmission, in particular of an actuating drive (14), in which an elastically deformable bending element (4) that deforms as a function of the torque is arranged in a transmission path of the torque, and a sensor unit (8) with which deformation of the bending element can be detected forms a structural unit which can be mounted as a whole.
Abstract:
A power transmission apparatus includes a shaft, a driving plate, a first driven plate, and a sensor device. The driving plate is disposed on the shaft and rotates with the shaft. The driving plate includes a first block that has a driving surface on it. The first driven plate is disposed on the shaft and capable of moving along the shaft. The first driven plate includes a second block that has a driven surface corresponding to the driving surface. The sensor device is disposed close to the first driven plate for detecting the movement of the first driven plate along the shaft. When the shaft rotates together with the driving plate, the driving surface compels the driven surface to rotate and simultaneously move away from the driving plate along the shaft, and the movement along the shaft is detected by the sensor device.
Abstract:
A torque sensing device includes a rotating component configured to rotate about an axis of rotation and a first sensor positioned adjacent to the rotating component to sense instantaneous angular position of the rotating component at a first location. A second sensor is positioned adjacent to the rotating component radially inboard of the first sensor to sense instantaneous angular position of the rotating component at a second location. A controller is operably coupled to the first sensor and the second sensor. The controller determines a relative phase shift between a first signal generated by the first sensor and a second signal generated by the second sensor to calculate an output proportional to a torque applied to the rotating component.
Abstract:
A method and apparatus for measuring the force applied by a first member coupled to a second member by a connecting body, by: transmitting a cyclically-repeating energy wave through the connecting body from a first location thereon to a second location thereon; measuring the transit time of the cyclically-repeating energy wave from the first location to the second location; and utilizing the measured transit time to produce a measurement of the force. In the preferred described embodiment, the connecting body is a fastening plate which fastens a drive shaft to a driven shaft and measures the torque output of the drive shaft.
Abstract:
A torque monitoring apparatus is disclosed herein. The torque monitoring apparatus includes a hub extending along an axis of rotation between first and second opposite ends. The torque monitoring apparatus also includes a plurality of spokes positioned on the hub and extending radially outward from the hub to respective distal ends. The torque monitoring apparatus also includes a plurality of projections spaced from the plurality of spokes along the axis of rotation. Each of the plurality of projections extends radially outward from the hub to respective distal ends. The plurality of projections are thinner along the axis than the plurality of spokes.
Abstract:
Aspects of the present invention are directed to using surface acoustic wave (SAW) sensors mounted on a disc coupling component in a powertrain to measure the torque generated by an automobile engine. The sensor may be positioned and oriented on the disc coupling component so that the phase velocities of SAWs propagating through active elements of the SAW sensors are aligned with principal strain components due to torque in the disc coupling component. The torque may be calculated by determining the difference between resonant frequencies of the active elements to suppress common-mode interference factors. In addition, SAW resonant frequencies may be communicated in a non-contacting manner by utilizing rotary and stationary couplers employing radio frequency (RF) signals. Moreover, SAW sensors may be activated and interrogated by employing targeted RF pulses having different carrier frequencies at or near respective resonant frequencies of each resonator in a SAW sensor.
Abstract:
Two external rings and an internal ring form an assembly that is connected to a column so it rotates with it, to which column the torque to be measured is applied. Elastically deformable members connect the internal ring to one external ring, and the other external ring remaining essentially unstressed. A measurement device, such as, for example, a probe having at least one with Hall effect device, measures relative displacement of the two external rings to determine the torque applied. The invention also concerns the steering devices equipped with such torque sensors, for example, for power or assisted steering.
Abstract:
A device for measuring torques, especially for reduction gearing for activating a functional member of a motor vehicle, of the type including an electric motor (1) with permanent magnets, the output shaft (2) of which is connected to a worm (3) associated with a wheel (4), itself connected through means forming an elastically deformable damper (5) to an output member (6) of the reduction gearing, is characterized in that it includes means (9, 10) for determining angular displacements of the wheel and of the output member, these means being connected to means (8) for determining the resistive torques applied to this output member on the basis of the relative angular displacement between the wheel and the member.
Abstract:
A tool driver for use in robotic surgery includes a base configured to couple to a distal end of a robotic arm, and a tool carriage slidingly engaged with the base and configured to receive a surgical tool. In one variation, the tool carriage may include a plurality of linear axis drives configured to actuate one or more articulated movements of the surgical tool. In another variation, the tool carriage may include a plurality of rotary axis drives configured to actuate one or more articulated movements of the surgical tool. Various sensors, such as a capacitive load cell for measuring axial load, a position sensor for measuring linear position of the guide based on the rotational positions of gears in a gear transmission, and/or a capacitive torque sensor based on differential capacitance, may be included in the tool driver.
Abstract:
A torque sensor according to the present invention includes a strain body, first structure Y-axis connecting portions, second structure X-axis connecting portions and a detection element. The first structure Y-axis connecting portions are disposed on a positive side and a negative side of a Y-axis relative to the strain body, and the second structure X-axis connecting portions are disposed on a positive side and a negative side of an X-axis relative to the second structure. The strain body includes four deformable bodies each including a displacement portion that is displaced in a Z-axis direction by elastic deformation. The deformable bodies are respectively disposed in a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant. The detection element includes a capacitive element that detects a change in capacitance value by a displacement of the displacement portion of each of the deformable bodies in the Z-axis direction.