43results about How to "Addressing the drop in accuracy" patented technology

The invention provides a vehicle networking data processing method, a server and a terminal. The method comprises the following steps of acquiring vehicle-running historical data by the server; training the vehicle-running historical data and acquiring a program script used for analyzing a user driving behavior; and sending the program script to the terminal. In the technical scheme of the invention, through the server, the vehicle-running historical data is firstly acquired, then, the vehicle-running historical data is trained and the program script used for analyzing the user driving behavior is acquired, and finally, the program script is sent to the terminal. According to the program script and the vehicle-running data, the user driving behavior is dynamically analyzed. A problem thatalgorithm precision is reduced because algorithm updating is not timely is solved. Accuracy of user driving behavior analysis is guaranteed, and further, extra cost brought by terminal firmware updating is reduced.

The invention discloses a ball screw prestretching mechanism and a prestretching method thereof. The ball screw prestretching mechanism comprises a ball screw pair, a front locking module and a back locking module, wherein the front end and the back end of the ball screw pair are respectively fixed by the front locking module and the back locking module; the back locking module includes a back end bearing, a back end bearing sleeve and a back end bearing base coating the ball screw pair in sequence from inside to outside; the back end bearing sleeve is coated with a stretching unit; the stretching nut is near the outer side of the back end bearing base; and a rotation preventing pin is inserted in the back end bearing base, and is butted against the outer surface of the back end bearing sleeve after penetrating through the back end bearing base. The ball screw prestretching mechanism can obtain the beneficial effect of preventing the blockage phenomenon of a ball screw by a bearing inner ring due to a bearing locking nut stretching the ball screw when locking a ball screw bearing.

The invention discloses a fast target positioning method based on ground object coordinate information, which determines the attitude deviation of the satellite according to the position information of the reference point and the orbit information of the satellite; and determines the attitude information of the satellite based on the attitude deviation Perform deviation compensation; determine the position information of the target point according to the compensated attitude information. The invention also discloses a device for quickly locating a target based on ground object coordinate information, a satellite carrying device and a storage medium.

The present invention provides a data processing method for the Internet of Vehicles, a server and a terminal, comprising: the server acquires driving history data; trains the driving history data to obtain a program script for analyzing user driving behavior; sends the program script to the terminal . In the technical solution of the present invention, the server first obtains the driving history data, then trains the driving history data to obtain a program script for analyzing the user's driving behavior, and finally sends the program script to the terminal. By dynamically analyzing the user's driving behavior according to the program script and driving data, the problem of algorithm accuracy decline due to untimely algorithm update is solved, the accuracy of the analysis of user driving behavior is ensured, and further, the update terminal firmware is reduced. additional costs.

A F-P pressure sensor with a composite dielectric film disclosed by the present invention comprises an upper ferrule with a F-P resonant cavity, a lower ferrule which is axially fixedly connected with the upper ferrule and inserted into the lower ferrule. A ferrule for the fiber, and a pressure diaphragm covering the port of the F‑P resonator. At least one layer of composite dielectric film is grown on the back side of the pressure diaphragm and the silicon wafer at the bottom of the groove of the F-P resonator, and the composite dielectric film is SiO 2 / Ta 2 o 5 Thin film, Si 3 N 4 / Ta 2 o 5 thin film or SiO 2 / Ta 2 o 5 / Si 3 N 4 A multilayer film in at least one combination form. The invention has the advantages of simple structure, convenient and quick manufacture, low cost and high thermal stability. In the present invention, a composite dielectric film is grown on the back of the pressure diaphragm and the bottom surface of the upper ferrule groove, and the F-P resonant cavity is formed by connecting the pressure diaphragm with the upper ferrule to match the reflectivity of the system. This combined composite dielectric film is not only thermally stable At the same time, it can be combined according to the design requirements to obtain the reflectivity that meets the system requirements.

The invention discloses an industrial robot track precision compensation system and method based on kinematics analysis. The robot interconnection interface and the measurement interconnection interface are respectively connected to the robot controller and the measurement bottom layer interface. Both the robot interconnection interface and the measurement interconnection interface are connected to the input terminal of the trajectory deviation calculation module, and the output terminals of the trajectory deviation calculation module are respectively connected to the parameter identification module and The accuracy evaluation module, the output terminal of the parameter identification module is connected to the robot interconnection interface through the compensation control module, and the trajectory control module is connected to the robot interconnection interface; the method establishes the motion trajectory deviation model of the industrial robot, and then uses the robot trajectory data measured by the measuring equipment to carry out Model parameter identification, and finally the identified error data is used for parameter compensation of the robot kinematics model. The invention compensates the motion track deviation of the industrial robot from the perspective of kinematics analysis, improves the motion track accuracy of the robot, has low cost and is easy to implement.

Embodiments of the present application provide a water body extraction method, device, electronic device, and storage medium for remote sensing images, which relate to the technical field of remote sensing images. The method includes acquiring a remote sensing image to be tested, and preprocessing the remote sensing image to be tested; and preliminarily extracting the water body region of the preprocessed remote sensing image to be tested based on a water body index, a brightness index and a shadow index, to obtain Spot image; use the pre-established water body discrimination model to identify the spot image to distinguish the water body spot and the non-water body spot; according to the discrimination result, obtain the water body extraction result, and use the brightness index and the shadow index to remove the interference, so as to The accuracy of the water body extraction result is improved, and the problem that the accuracy of the existing method is reduced due to interference is solved.