67results about How to "The calibration method is simple" patented technology

The invention provides a reference positioning method of CCD (Charge Coupled Device) cameras. The method comprises the steps of simultaneously correcting the two CCD cameras, placing the first CCD camera and the second CCD camera on a platform, allowing lenses of the first CCD camera and the second CCD camera to be perpendicularly downward and have certain distances from the platform, correcting the perpendicularity of the first CCD camera and the second CCD camera, horizontally placing a leveling rod under the first CCD camera and the second CCD camera, allowing the first CCD camera and the second CCD camera to shoot images of the leveling rod, transmitting the images to a PC (Personal Computer) for processing, and adjusting a position of the first CCD camera or the second CCD camera according to a processing result until correction of a relative position of the first CCD camera and the second CCD camera is completed. The reference positioning method is simple and high in accuracy.

The invention relates to the field of image splicing and particularly relates to a method for quickly splicing aerial images of an unmanned aerial vehicle in emergency rescue activities. The method comprises the following steps of acquiring aerial data of the unmanned aerial vehicle; thinning the number of the images, and then performing distortion correction and image rearrangement on each imageparticipating in splicing; air strip image splicing being carried out based on the image texture, and then air strip splicing being carried out; and finally, geometrically correcting the spliced imageby taking the central point of the original image as a control point so that the image has geographic space information. According to the method, by reducing the image data and simplifying the data processing process, image splicing can be rapidly carried out, meanwhile, the image data has measurability, splicing efficiency of aerial images of the unmanned aerial vehicle is greatly improved, andthe obtained image splicing image can meet the requirement for emergency rescue command in precision.

The invention provides a lens radial distortion correction method, and belongs to the technical field of image processing. The invention can correct the obvious radial distortion of a short focal length lens, is simple in correction method, is good in correction effect, and has strong robustness. In the present invention, the J-Linkage algorithm is used to perform automatic clustering by using theJachard distance, the number of model instances does not need to be given in advance, and parameter debugging can be avoided; in the invention, according to the number of similar arcs and different distortion models, three methods are proposed to calculate the distortion center and a distortion coefficient. In the invention, the inverse model correction algorithm can avoid holes of the correctedimage, and successfully avoids additional operations such as interpolation; and a better correction effect and better real-time performance can be obtained.

The invention discloses an accurate correction method of a fluorescence quenching rate in an inner filtering efficiency process of a fluorescence quenching system, and the method is characterized by comprising the following steps of: firstly, correcting influences of competitive absorption on a light spectrum; then, correcting the influences of absorption on the light spectrum; and correcting the influences of absorption distribution on the light spectrum. The method disclosed by the invention can be used for carrying out combined correction on the influences caused by a fluorescence inner filtering efficiency and absorption distribution, so as to ensure that the light spectrum of the quenching system is accurately corrected; and the fluorescence quenching rate in the quenching process is really reflected.

The invention provides a method and a device for fault tolerance of a grading instruction memory structure capable of actively writing back. The device comprises a grading instruction memory, an instruction fault correcting and checking module, an instruction character register, and an instruction address register. The method comprises: 1, starting and operating a processor; 2, taking out instruction character data from the grading instruction memory; 3, sending the instruction character data to the instruction fault correcting and checking module; 4, determining a fault correcting and checking result to have no fault or have a correctable fault; if yes, continuing to perform a step 5; if no, jumping to step 10; 5, writing an instruction character to the instruction character register; 6,updating the instruction address register; 7, determining whether a correctable fault occurs; if yes, continuing to perform a step 8; if no, jumping to a step 9; 8, writing the instruction character data back to the grading instruction memory; 9, ending processing; jumping to the step 2, processing the address of the next instruction; 10, when the instruction character data has uncorrectable fault, suspending the processor. The method and the device realize fault tolerance of instructions and the instruction memory, and have relatively low hardware cost.

The invention provides an electromagnetic sensing principle based inspection component of a concrete reinforcement detector. The inspection component is manufactured from organic glass. The inspection component is manufactured by the steps of manufacturing an organic glass component, and manufacturing a standard reinforcement bar. The organic glass component is manufactured by the steps of a) blanking, namely, cutting into blocks as requirement through a portable electric saw; b) roughly planing, namely, roughly planing the organic glass blocks through a numerical control milling machine, wherein the rough planing precision is +/-0.0.2mm; c) drilling a hole, namely, drilling reinforcement preset aperture in the roughly planed organic glass plate through a drilling machine according to the design aperture position, wherein the drilling precision is +0.02mm; d) polishing the aperture, namely, polishing the aperture through a zinc bar and a polishing machine, wherein a nylon fabric coils the zinc bar, and polishing wax is coated on the nylon fabric, and about 0.02mm diameter is increased after polishing; e) polishing the surface, namely, polishing the organic glass surface through a diamond polishing machine. The standard reinforcement bar is manufactured by the steps of milling an HRB400 reinforcement through a machine tool, wherein the processing precision is -0.02mm, the length is 20mm less than that of the organic glass, and 10mm is reserved in two ends of the standard reinforcement bar; sealing through curing glue.

The invention provides a method for correcting internal resistance measurement accuracy of a valve regulated sealed lead acid storage battery. The method mainly comprises the first step that a storage battery set is in a float charging state after equalizing charging is carried out on the storage battery, the second step that a storage battery internal resistance measurement procedure is started, high-current discharge is carried out on the storage battery, a corresponding voltage is generated, the voltage is measured, the specific value of the voltage and the discharging current is calculated, and the internal resistance of the storage battery can be obtained, and the third step that a standard micro resistance string is connected to a negative electrode column of the storage battery in series, the relative error of the internal resistance is calculated, and the relative error of the internal resistance is within a credible range.

The invention discloses a processing method for a conical surface of an inclined base plate of an aluminum extruder. A correcting tool for the conical surface of the inclined base plate is used for processing the conical surface of the inclined base plate of the aluminum extruder. The processing method comprises the following steps of: firstly, fixedly connecting two to-be-processed inclined base plates with the correcting tool for the conical surface of the inclined base plate; secondly, roughly processing the conical surfaces of the inclined base plates on a boring mill; and thirdly, finely processing the conical surfaces of the inclined base plate workpieces on a vertical vehicle. In the invention, the method for correcting and processing the conical surface of the inclined base plate of the aluminum extruder is simplified and the processing efficiency for the inclined base plate is greatly increased. The invention also discloses the correcting tool for the conical surface of the inclined base plate.

The invention relates to a site calibration method for solving delay problem among different combination units of an intelligent substrate. The site calibration method comprises the steps of (1) analyzing a differential current size when delay is not consistent and analyzing influence of protection; (2) selecting a calibration method according to a delay analysis result, wherein the calibration method comprises a calibration method for that the delay difference of different combination units is a non-integer multiple of cycle wave and a calibration method for that the delay difference of different combination units is an integer multiple of cycle wave. By the method, the inconsistent conditions of the combination units at each side are classified and separately discussed, a new calibration method for inconsistent delay of the combination units at each side and a calibration method of a dual-configuration protection device, which are corresponding to different conditions, are proposed on the basis, and the method has the characteristics of high practicability, simplicity and the like, and is easy to operate.

The invention discloses a photovoltaic module three-code automatic verification method. The photovoltaic module three-code automatic verification method comprises the following steps A, after a moduleis transferred to a three-code verification station through an assembly line, a photoelectric induction switch triggers a restoration mechanism to perform positioning and fixing on the module position; B, meanwhile, three code-scanning guns scan bar codes of the corresponding position at the same time, and transmit the bar code information to a communication module and a control program module ina PLC controller separately; and C, after the communication module and the control program receive the bar code information, an analysis system takes 3-5 seconds to perform bar code information comparison. The verification method disclosed in the invention is simple and capable of replacing manual examination and verification, avoiding leak detection, realizing 100% of examination and verification and ensuring unification of three codes of each module, meanwhile, improving operational automation, saving manpower, improving operation efficiency and achieving an excellent verification effect.