A force sensor has a first end portion (1), a second end portion (2), a parallel-guiding mechanism (3), a beam (4), and a strain gauge (5). The parallel-guiding mechanism (3) connects the first end portion (1) to the second end portion (2). A main beam (43) of the beam has a flexible wall (435) and a rigid wall (432). A first connecting part (41) connects the flexible wall to the first end portion, and a second connecting part (42) connects the rigid wall to the second end portion. The strain gauge (5) is fixed to the flexible wall (435). The force sensor can measure a relatively small force.

A force torque sensor device includes a sensor chip that detects a displacement in a predetermined axis direction, a strain body that transmits an applied force to the sensor chip, and an adhesive that bonds the sensor chip to the strain body. The Young's modulus of the adhesive is greater than or equal to 130 MPa and less than or equal to 1.5 GPa.

A load cell that includes a beam extending from a fixed section to a load section including a deflection section that moves under a load and a central beam section spaced from the deflection section. At least one strain gauge is coupled to the beam for detecting movement of the beam. A stop element including a bearing surface is also provided and coupled to the beam and configured such that the bearing surface does not engage the beam in a first position and engages the beam in a second position.

A device includes a first member and a second member disposed in series along a longitudinal axis. The device also includes links coupling first joints of the first member to second joints of the second member. The first and second members and the links arranged to define a planar parallelogram linkage. The devices also include a resilient element disposed between the first member and the second member, the first member and the second member preloaded against the resilient element. The first member and the second member are preloaded to provide an arrangement of the first and the second joints in which a motion of the first joints with respect to the second joints is constrained to a direction substantially parallel to the longitudinal axis. The devices further include a sensor for generating a signal indicating a separation between the first member and the second member.

Disclosed is a load cell having a frame that includes a first and a second mounting surface. Each mounting surface is arranged on a common horizontal plane symmetrically about a central vertical axis. First and second lateral surfaces are arranged perpendicular to the first and second mounting surfaces. One or more mounting fixtures are located on the load cell at the first and second mounting surfaces and configured to attach to a support structure or a loading fixture. One or more force sensors are arranged symmetrically about the central vertical axis. One or more cavities extend the width of the frame and are arranged between a mounting fixture and the force sensors to buffer horizontal shear forces.

The present disclosure relates to force sensors and force sensor substrates for use with surgical devices.

A load cell with a Roberval structure having an anti-offset function, and a weighing device are disclosed. The load cell includes strain detection elements mounted on an elastic element which includes a loading portion for receiving a load from a connector, a fixing portion for fixing the elastic element, a strain generation portion for converting the load into deformation, and a parallel guide beam for transferring the load and keeping the loading portion translational when loaded. The strain generation portion includes at least one hollow cavity body. The loading portion and the fixing portion are respectively located on left and right sides of the strain generation portion. The parallel guide beam is located at upper and lower portions of the strain generation portion A center of rotation and a geometric center of the strain generation portion coincide when the load cell with the Roberval structure is loaded.

An apparatus for measuring strain in a polished rod of a beam pump unit includes a body having an upper wide section, a lower wide section, and a narrow section having a reduced width in comparison to each of the upper and lower wide sections. A bore is formed in the narrow section. The apparatus also includes at least two connectors configured to connect the body to the rod. The bore is positioned between the two connectors in a direction that is parallel to an axis of the rod. The apparatus further includes a strain gauge positioned in the bore, so as to measure strain in the rod between the two points of connection.

A flexure structure comprising the unitary combination of three modified S-shaped beams arranged in parallel and sharing common top and bottom structures. The outside beams are oriented alike in one direction while the inside or center beam is oriented in the opposite direction. The outside edge surfaces of the beams are flat and are instrumented with strain sensors connected in bridge circuits.

A flexure structure comprising the unitary combination of three modified S-shaped beams arranged in parallel and sharing common top and bottom structures. The outside beams are oriented alike in one direction while the inside or center beam is oriented in the opposite direction. The outside edge surfaces of the beams are flat and are instrumented with strain sensors connected in bridge circuits.