34results about How to "Avoid readjustment" patented technology

The invention discloses a workpiece clamp and a knife grinding machine. The workpiece clamp comprises a machine base, a collet, a regulation mechanism and a drive mechanism. The machine base is provided with a guide hole. Multiple installation holes are formed in the hole wall of the guide hole. The multiple installation holes are distributed in the circumferential direction of the guide hole. Thecollet is arranged in the guide hole and can reciprocate along the guide hole. Multiple axial telescopic seams are formed in the clamping end of the collet. The clamping end of the collet is segmented into multiple clamping petals through the multiple axial telescopic seams. A wedge-shaped protrusion is arranged on the outer side of each clamping petal. The regulation mechanism comprises multipleregulation parts which are connected with the installation holes and can be used in cooperation with the collet to regulate the roundness of the collet. The drive mechanism can drive the collet to reciprocate along the guide hole. The knife grinding machine comprises the workpiece clamp. The workpiece clamp is adjustable in precision and good in retainability, good precision is still kept under the repeated knife releasing and pulling actions, it is avoided that regulation is conducted again, the production efficiency is improved, and therefore the negative phenomenon that the precision retainability is poor is improved.

The invention relates to a multi-user television and a management method thereof, wherein the multi-user television management method comprises: displaying a user access interface; receiving user access information; loading the user setting corresponding to the user access information into the television. The method provides a multi-user access mechanism for the television, and user can refer to self user access information and download suitable display setting parameters to avoid readjustment in watch. Additionally, the invention can distribute different application rights for users according to the user access information to support the management on the television.

A method for real-time planning of a maneuvering target of a spacecraft in a moving coordinate system. First, the initial calculation of conventional attitude maneuvering planning is performed to obtain the initial quaternion and maneuvering planning parameters of the target moving coordinate system relative to the satellite orbit system, and then in each control cycle according to Maneuver planning parameter information, carry out real-time planning pre-calculation of conventional attitude maneuver planning, and obtain pre-calculation results. Finally, in each control cycle during the maneuver process, according to the real-time direction cosine matrix of the target moving coordinate system relative to the orbit system, the target moving coordinate Calculate the angular velocity of the real-time planning relative to the inertial system attitude quaternion and the real-time planning relative to the angular velocity of the inertial system, and complete the real-time planning of the spacecraft for the maneuvering target of the moving coordinate system.

The disclosure provides a method and device for updating connection parameters of a Bluetooth low-power device. The method includes: when it is detected that the local remote control mode is switched, sending a prompt message to the controlled device to switch the remote control mode of the Bluetooth remote control device, so that the controlled device The device generates a connection parameter update request according to the prompt message, and sends it to the Bluetooth remote control device. The connection parameter update request carries the effective time point of the connection parameter, which is earlier than the default effective time point; Each connection interval monitors whether the connection parameter update request sent by the controlled device is received locally; when the connection parameter update request is detected, a response for agreeing to update the connection parameters is sent to the controlled device; when the effective time of the connection parameter When arriving, update the connection parameters between the local and the controlled device. To sum up, the technical solution of the present disclosure can improve the update speed of the connection parameters by improving the response speed of the Bluetooth remote control device.