A torque sensor includes: a first area having a first surface and a second surface opposite the first surface; a second area provided around the first area; a plurality of beams connecting the first area to the second area; and a detector provided on the first surface of the first area and configured to detect torque applied between the first area and the second area. The detector includes: an insulation film layered on the first area; and strain gauges layered on the insulation film and being deformable in response to torque. The second surface of the first area is provided with screw holes that do not reach the first surface and into which fasteners are respectively screwed. A thickness defined between a bottom of each of the screw holes and the first surface is equal to or more than one fourth of a diameter of each of the screw holes.

Provided is a multi-axis force sensing device, including a central portion, an outer ring portion, multiple measurement shafts, and multiple sensing groups. The outer ring portion surrounds the central portion. The measurement shafts are respectively connected between the central portion and the outer ring portion. The measurement shafts are equally disposed on an outer side of the central portion. A first surface and a second surface of each measurement shaft are respectively disposed with one of the sensing groups. Each sensing group includes a first strain sensing element and a second strain sensing element. The first strain sensing element is disposed on a first central line of symmetry on the first surface or on a second central line of symmetry on the second surface. The second strain sensing element is disposed on the first surface or the second surface.

An embodiment is to provide a strain sensor fixing device and torque sensor using the same capable of preventing the sensor performance from being deteriorated, and preventing the device configuration from being upsized, and further capable of securely fixing the strain sensor to a structure. A fixing member includes a first end and a second end. The first end is provided with a projection which contacts a first structure and the second end contacts a first end of a strain body provided on the first structure. A screw is inserted into the first structure and screwed into a part of the fixing member between the first end and the second end.

A system for sensing torque of an object includes a flange having a first length along a main axis of a main surface of the flange and a torque sensor device formed over the main surface of the flange. The torque sensor device includes a sensing portion and a plurality of measurement transducers formed over the sensing portion. The torque sensor device has a second length parallel to the main surface of the flange and a third length parallel to the main surface of the flange. The second length and the third length are each smaller than half of the first length.

A torque sensor comprises a transducer plate comprising a center area and periphery connected by a plurality of spokes and instrumentation beams. The transducer plate exhibits mechanical compliance under axial torque, but stiffness under off-axis loads. Strain gages attached to instrumentation beams detect deformation caused by axial torques. The instrumentation beams are asymmetric in some embodiments, allowing strain gages to be placed in regions of high sensitivity to axial torques and low sensitivity to off-axis loads. The strain gage responses from some off-axis loads are designed to be coupled to, or linearly dependent on, the strain gage responses of other off-axis loads. This reduces the number of strain gages need to at least partially resolve all loads. The spokes and beams are cost-effectively formed by removing adjacent transducer plate material in simple shapes. The strain gages may be connected in various ways, such as Wheatstone quarter-, half-, or full-bridge topologies.

The object is to provide a mounting structure for a torque sensor capable of improving a detection accuracy of a torque sensor. A torque sensor includes a first structure, a second structure, a third structure provided between the first structure and the second structure, and at least two sensor units provided between the first structure and the second structure. A plurality of contact portions are provided on one of the first structure and the first attachment portion and one of the second structure and the second attachment portion, and are in contact with another of the first structure and the first attachment portion and another of the second structure and the second attachment portion.

An elastic transmission element is part of a strain wave gear. Such strain wave gears are also referred to as Harmonic Drives. The elastic transmission element is also referred to as a flexspline and has an outer toothing (03). The elastic transmission element is equipped with at least one strain gauge (04) for measuring a mechanical strain on the elastic transmission element. The one strain gauge (04) or the plurality of strain gauges (04) extends at least as a whole about a circumference of a lateral surface or an axial lateral face of the elastic transmission element.

The present invention relates to a power transmission apparatus capable of measuring torque and a power generation apparatus using the same, and more particularly, to a power transmission apparatus capable of measuring torque and a power generation apparatus using the same which includes a disk-shaped outer body that receives power from the outside, an inner body that is coupled to the inside of the outer body, and at least one load cell formed between the outer body and the inner body.

A torque sensor includes a first structure, a second structure, a third structure provided between the first structure and the second structure, and at least two sensor units provided between the first structure and the second structure. A plurality of first contact portions having a structure integrated with the first structure is provided inside an outer peripheral portion of the first structure, first distal ends are arranged near the outer peripheral portion, and the first distal ends are in contact with a first attachment portion. A plurality of second contact portions having a structure integrated with the second structure is provided at a part of an inner peripheral portion of the second structure, second distal ends are arranged near the inner peripheral portion, and the second distal ends are in contact with a second attachment portion.

A torque sensor which can improve detection accuracy is provided. The torque sensor includes a first structure, a second structure, a third structure provided between the first structure and the second structure and at least two sensor portions provided between the first structure and the second structure, and a stiffness of one of the first structure and the second structure, closer to the sensor portions is higher than that of the other one.