3 results about "Narrow range" patented technology

The invention belongs to the technical field of mechanical measurement, particularly discloses a multilayer porous coaxiality high-precision measurement tool and a measurement method, and solves the problems of large measurement error, narrow range, low efficiency and poor adaptability of a traditional mandrel and filler gauge. The tool comprises a reference shaft, a rotating sleeve, a meter clamp fixing rod, a meter clamp and a measuring meter. The outer circle A of the reference shaft is matched with an upper annular plate opening hole (the diameter is 0.08-0.10 mm), and the outer circle B of the reference shaft is matched with a small gap (0.02-0.035 mm) of the rotating sleeve. And the measuring meter is clamped on the rotating sleeve through the meter clamp and can measure the circumferential run-out of the annular plate hole. The method comprises the following steps of: after the reference shaft is aligned, moving / rotating the rotating sleeve with the meter, measuring the deviation of the middle-lower section hole, projecting the center of the hole to the same plane, and calculating the diameter of the minimum circle containing three points as the coaxiality; the remote meter can be connected with a computer for real-time monitoring. The device is free of dead angle in measurement, high in measurement efficiency, excellent in precision, capable of reducing labor intensity and suitable for multi-layer annular plate multi-hole coaxiality detection, and the precision is not affected by the large lower-layer holes.

The utility model relates to bearing detection technical field discloses an angle adjustable roller sample part platform, this sample part platform replaces the rotation function of traditional mechanical hand clamping jaw through the angle fine adjustment mechanism of workbench end, core includes: the V -groove of support frame sets up roller and places, one end articulates in workbench support plate, and the other end is equipped with the fine adjustment subassembly of floating support block and adjusting bolt, rotates around the hinge that the rotation bolt drives support frame, realizes the precision horizontal positioning of roller axis. For bearing roller ±2 degree cone angle tolerance, the high resolution design of preferred scheme limits the adjustment range of ±2.5 and single ring adjustment angle is less than or equal to 1.15. Its beneficial effect is: 1. eliminate the mechanical hand rotating mechanism, and the manufacturing cost of clamping jaw reduces 60%, and the failure rate reduces to below 1%; 2. realize the high accuracy adjustment of narrow range, and the horizontal positioning error is less than or equal to 0.05, and single -time adjustment time shortens to 15 seconds, solves the industry bottleneck of calibration efficiency and accuracy.

The application discloses a radar and video automatic calibration method based on trajectory tracing, which obtains images through a video monitoring device and inputs the images into a convolution model to identify targets and obtain state information of each detection target; an initial transformation matrix is obtained by correcting the images of the target detection area; multiple target state information of multiple frames of radars is taken and trajectory statistics is performed; lane information is inversely deduced by analyzing the trajectory information of video targets and radar targets; two coordinate systems are associated according to the lane information and the longitudinal relative position information of the targets, the module area is divided according to the lane information, calculation is performed according to the associated information and the module area, and a radar and video perspective transformation matrix is obtained. According to the lane information of the trajectory tracing detection target, and according to the relative positions of the targets before and after, two targets of different coordinate systems are accurately associated, the shortcomings of low efficiency, narrow range and point drift of manual calibration point selection are improved, and fast and efficient automatic calibration is realized.