52results about How to "Accurate angle measurement" patented technology

Disclosed is an angle sensor, which is capable of accurately measuring an angle of a steering shaft by selecting an optimum gear ratio between main and subsidiary gears constituting the angle sensor, measures a rotation amount of a vehicle steering shaft, and includes a ring-shaped main gear (20) rotating along with the steering shaft, a first subsidiary gear (22) rotated by rotation of the main gear and having a magnet (32) coupled to a surface thereof, and a magnetic device detecting a change in magnetic field of the magnet and outputting data on a rotation amount, so that the first subsidiary gear (22) rotates four times while the main gear (20) rotates once, and a value of a scale factor is minimized during a process of acquiring valid data for measuring the angle of the main gear and thereby an error of a measured value is minimized.

The invention relates to the technical field of multi-freedom-degree joints, in particular to a two-freedom-degree joint structure. The two-freedom-degree joint structure comprises a U-shaped fixed plate, a U-shaped connecting plate, a first-freedom-degree mechanism and a second-freedom-degree mechanism arranged on the U-shaped connecting plate, wherein the U-shaped fixed plate and the U-shaped connecting plate can rotate oppositely. A bottom plate of the U-shaped fixed plate and a bottom plate of the U-shaped connecting plate are arranged oppositely. A first side plate of the U-shaped connecting plate is connected to the inner side of a first side plate of the U-shaped fixed plate through the first-freedom-degree mechanism. A second side plate of the U-shaped connecting plate is rotationally connected to the inner side of a second side plate of the U-shaped fixed plate. The two-freedom-degree joint structure is simple in structure, reasonable in design, convenient to mount, use and control, high in universality and practicability, long in service life and convenient to use and popularize.

The invention discloses an automatic real-time measurement device for a bending angle of a bending machine and aims to solve the technical problems of steel wire flexible deformation, inaccurate transmission and the necessity of extra mechanism for backing to an initial state, in case of a conventional bending angle measurement device in the prior art. The technical scheme adopted is that the device provided by the invention comprises an upper die, a lower die and a workpiece, and further comprises a base and at least one bending angle measurement device body on the base, wherein the bending angle measurement device bodies and the lower die are fixed on the base; the bending angle measurement device bodies are positioned between the lower dies. The measurement device body, in the initial state, comprises a saddle fixed on the base, a guide rod fixed on the saddle, a left half part and a right half part both arranged on the guide rod in a sliding manner, and a tension spring connecting the left half part and the right half part. The device provided by the invention has the advantages that a link mechanism is adopted for accurate transmission, and self-return under the action of gravity is realized; and the bending angle of the overall workpiece is measured in a way of measuring the bending angles of two sides of the bended piece at the same time. Therefore, the automatic measurement device is simple, accurate in transmission, and easy to realize.

The invention discloses an ADS-B-based anti-collision system, comprising: an ADS-B information decoding module: used to decode the received ADS-B information broadcast by a neighboring machine, and calculate the position information of the neighboring machine; ADS-B B monitoring and tracking processing module: used to convert the position information of the neighboring machine into the angle of the neighboring machine relative to the own machine, the distance, height and time stamp of the neighboring machine relative to the own machine, and confirm whether the neighboring machine is tracked, and then The tracking information list is sent to the anti-collision information processing sub-module; the anti-collision information processing sub-module is used to use the anti-collision algorithm to process the angle, distance, height and time stamp of the adjacent aircraft in the tracking information list, and make an anti-collision alarm decision-making and traffic alert decision-making. The invention can reduce the dependence on the radio frequency module in the traditional TCAS, simplify the equipment and reduce the cost, and is more suitable for light aircraft or unmanned aerial vehicles. At the same time, the frequency of query sending is reduced, and the interference to the airspace wireless environment is reduced.