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1144 results about "Two degrees of freedom" patented technology

The 2 degrees of freedom refers to the robot not just the attachment. This is just to make sure the robot has some complexity. 2 degrees of freedom can be forward, backward and turning. If you use two motors you have two degrees of freedom. LEGO is capable of three degrees of freedom because it has three output ports.

Method and apparatus for providing force feedback using multiple grounded actuators

InactiveUS6946812B1Highly realistic force feedbackInertial contribution is lowProgramme-controlled manipulatorComputer controlClosed loopActuator
An apparatus and method for interfacing the motion of a user-manipulable object with a computer system includes a user object physically contacted or grasped by a user. A 3-D spatial mechanism is coupled to the user object, such as a stylus or a medical instrument, and provides three degrees of freedom to the user object. Three grounded actuators provide forces in the three degrees of freedom. Two of the degrees of freedom are a planar workspace provided by a closed-loop linkage of members, and the third degree of freedom is rotation of the planar workspace provided by a rotatable carriage. Capstan drive mechanisms transmit forces between actuators and the user object and include drums coupled to the carriage, pulleys coupled to-grounded actuators, and flexible cables transmitting force between the pulleys and the drums. The flexibility of the cable allows the drums to rotate with the carriage while the pulleys and actuators remain fixed to ground. The interface also may include a floating gimbal mechanism coupling the linkage to the user object. The floating gimbal mechanism includes rotatably coupled gimbal members that provide three degrees of freedom to the user object and capstan mechanisms coupled between sensors and the gimbal members for providing enhanced sensor resolution.

Four-leg robot mechanism based on bionic design

The invention relates to a four-leg robot mechanism based on a bionic design. The four-leg robot mechanism consists of a body frame and four legs. The body frame consists of a front plate and a rear plate, two sides of the body frame are provided with flexible handles, and the robot mechanism is convenient to convey; each leg comprises a hip, a huckle, a knee and a crural part; the hip realizes two freedom degrees by adopting a differential bevel gear; the hip and the huckle are connected by an expansion sleeve to realize fast and convenient assembly and disassembly; the bevel gear drive motion is adopted by the knee; the crural part comprises a large cylinder, a small cylinder, a conical spring and a force sensor; and the large cylinder and the small cylinder are connected through the conical spring, so that the external impact force generated in the walking process of the robot can be buffered, the force sensor on a sole can acquire ground acting force, and the external environment can be conveniently sensed in real time and the robot can be subjected to balanced control conveniently. Through the bionic design idea, a spinal cord and a flexible foot mechanism of the robot are stimulated and designed, the flexibility of the robot movement is improved, the impact of the ground to the robot is reduced, and the robot mechanism has a compact structure and is convenient to install.

Follow-up type nasal endoscope operation auxiliary robot

The invention provides a follow-up type nasal endoscope operation auxiliary robot. The follow-up type nasal endoscope operation auxiliary robot comprises a guide rail adapter fitted to guide rails of different operation beds, an automatic lifting mechanism which is connected to the guide rail adapter and is lifted in the direction perpendicular to the operation beds, an automatic stretching mechanism which is connected to the tail end of the automatic lifting mechanism and stretches in a plane parallel to the operation beds, a two-degree-of-freedom RCM mechanism connected to the tail end of the automatic stretching mechanism, an automatic tail end adjusting mechanism which is connected to the tail end of the RCM mechanism and drives a nasal endoscope to conduct depth feeding and angle compensation and a controller which controls the automatic lifting mechanism, the automatic stretching mechanism, the RCM mechanism and the automatic tail end adjusting mechanism to move. A doctor is replaced with the robot in an operation to hold the nasal endoscope, appropriate adjustment in good time is carried out along with an operation instrument, the left hand of the doctor is liberated, picture swing occurring in the operation is overcome, the labor intensity of the doctor is reduced, and complications are reduced.
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