32results about How to "Novel detection method" patented technology

The invention relates to a detection method for mineral oil in sludge, which comprises the following steps of: preparing a group of standard samples in different concentrations, entering the concentration of each standard sample to a computer, determining absorbance of all of the standard samples in sequence on an ultraviolet spectrophotometer, establishing a standard curve between the concentrations and the absorbance on the computer, taking a sludge sample for dryness, adding petroleum ether to dilute, putting the sludge sample into the ultraviolet spectrophotometer showing the absorbance of the sample after performing ultrasound and extraction by an ultrasonic instrument and metering constant volume, obtaining the concentration of the detected sample according to the standard curve, and calculating the concentration of the mineral oil in the sludge by using a formula at last. The detection method has the advantages that an ultrasound extraction technology is used to extract the mineral oil from the sludge sample sufficiently in a short time period in the detection method, the data is accurate, the time period is short, the operation is simple, the timeliness is realized, the total time for detecting a single sample does not exceed 3h, and the guidance of field sludge handling is facilitated.

The invention discloses a system and a method for measuring the coplanarity of integrated circuit (IC) pins through multistage reflection and raster imaging. The system mainly comprises an IC chip dead load slant sliding feed mechanism, an external triggering synchronous control circuit, an IC chip pin imagingoptical path system, an image acquisition card and a personal computer (PC)-based intelligent visual inspection system. The IC chip pin imaging optical path system consists of two groups of mutually independent quasi-parallel blue-light light-emitting diode (LED) light sources, two rasters, and a plurality of reflectors and prisms which areorganically combined. A raster stripe images detected from the IC chip pins can be acquired throughthe imaging optical path system; and an image acquisition and analysis software system analyzes the images of the IC chip pins with raster stripes, evaluates the isometry of the pins in the images and the torsional characteristic of the raster stripes, and calculates a corresponding coplanarity error according to a corresponding f function mapping relation between a coplanarity error and the raster stripe curved degree. By the system and the method, two rows of pins of an IC chip are simultaneously imaged, the IC chip pins can be precisely detected through one-time imaging, the structure is compact, and the cost performance is high.

The invention provides a multi-target detection method based on a cascaded hourglass neural network, and aims to solve the technical problems that an existing detection method is too slow in speed anda small target is difficult to identify. The method comprises the following steps: step 1, collecting a training sample; step 2, building a deep learning framework and a backbone network cascade hourglass network of target detection; step 3, designing a label of the training sample as a confidence coefficient heat map; step 4, designing a loss function of the cascade hourglass network to optimizethe loss function; step 5, training the cascaded hourglass network to obtain a detection model; And step 6, multi-target detection. The method has the beneficial effects that various types of targetscan be quickly and accurately identified, and the small target identification capability is improved.

The invention discloses a medicine bottle liquid level detection method based on image processing. The method includes the steps of collecting a typical medicine bottle image to establish a reference template image, establishing matching templates and coordinate systems of the matching templates, matching a plurality of collected image of a detected medicine bottle with the matching templates in a one-to-one mode to obtain a displacement matrix of the images of the detected medicine bottle obtaining a corrected image of the images of the detected medicine bottle through affine transformation, segmenting the corrected image to obtain detection areas, extracting liquid level strip shapes, obtaining the liquid level lowest point on the basis of the characteristics of the liquid level strip shapes, and judging the qualification of the medicine bottle according to the relation between the liquid level lowest point and the set liquid level lowest point threshold value alpha and the relation between the liquid level lowest point and the set highest threshold value beta. The method is rapid in detection speed, and the total processing time of all the images of liquid medicine of the single bottle is within 100 ms. The sub-pixel-level accuracy is achieved for detection, the pixel deviation caused by vibration of a mechanical platform is eliminated, and the detection accuracy is greatly improved.

The invention relates to a bottle cap unqualified product marking method based on machine vision. The surface of a bottle cap to be tested is illuminated with an LED white annular light source, and the method includes the following steps that firstly, image information of qualified bottle caps is collected; secondly, an image of the bottle cap to be tested is collected; thirdly, the image preprocessed through median filter is subjected to binarization processing; fourthly, round locating is carried out, the edge of the bottle cap is found and serves as a round edge, and a coordinate system is built with the circle center as an original point; fifthly, the upper limit and the lower limit of the number of pixels of a detection target are preset according to the number of pixels of production date sprayed codes on the qualified bottle caps, the interior of a circle is set to be a region of interest (ROI) by means of the obtained round edge and the built coordinate system, the production date sprayed codes in the ROI serve as detection targets, and bottle cap detection is conducted; sixthly, unqualified products are marked. The algorithm which is used is simple, the number of steps is small, quick detection of images is achieved, detection efficiency is high, the method is little influenced by the environment, and accuracy is high.

The invention relates to the field of rapid detection of food safety and particularly relates to a preparation method and application of an electrochemical sensor based on a cobalt oxide/mesoporous carbon nanocomposite material and application of the electrochemical sensor in fast detection of nitrite content in a food. The preparation method of the electrochemical sensor comprises preparing a nanocomposite material carrying cobalt oxide particles and graphitized mesoporous carbon, and modifying a work electrode of the electrochemical sensor. The electrochemical sensor can detect a standard solution of nitrite, determine the linear relationship between the nitrite concentration and current, determine nitrite in the food and compare the nitrite content in the food and the linear relationship to obtain nitrite content of the food to be detected. The electrochemical sensor can determine nitrite content of a food, is easy to operate, has a fast detection rate and high detection sensitivity and provides a novel detection method for efficient and rapid detection of nitrite content in a food.

The invention discloses a computer network loop detection method which comprises the steps of (A) detecting CPU resources of a core switch and monitoring a broadcast data flow, (B) allowing a CPU to read the message of a core switch user port and judging core switch user port forms a loop, (C) allowing the CPU to judge network loop information according to the read message and loop information, (D) controlling the core switch to disconnect a network when an abnormal broadcast data flow is monitored, (E) judging whether to adopt controlled measures if the loop exists, (F) adopting the measures to stop data flow forwarding, and (G) automatically entering into a controlled state if the loop does not exist. The detection method is novel, a port with a network loop fault can be rapidly determined, thus the fault is rapidly eliminated, and the detection efficiency is high.

The invention relates to a book defect automatic detection method and a detection device, which can fundamentally solve the problems of slow check speed, long time consumption, great labor intensity of labors, inaccuracy of the detection, high omission ratio and high fall-out ratio in manual check. The key points of the technical are as follows: firstly establishing an original database in a computer system for storing original weight value of a book; placing the book on a weighing part of the book defect automatic detection device when the book is returned after being borrowed, leading a sensor part connected with the weighing part to produce an electrical signal, changing the electrical signal to a digital signal via an A/D converter, and finally storing the digital signal into the database through an I/O interface of the computer system; and using the computer system to compare detected weight data before and after borrowing the book and further displaying the defect result of the book. The method and the device have the advantages of novel detection principle, fast detection speed and high precision. The method and the device are applicable to libraries and the like.

The invention relates to a method for detecting a bottle cap surface production date based on machine vision. According to the method, an LED white ring light source illuminates the surface of a to-be-measured bottle cap. The method comprises the steps of collecting image information of a qualified bottle cap; collecting an image of a to-be-measured bottle cap; performing binarization processing on an image having undergone median filtering pre-processing; performing circle location, finding a bottle cap edge to serve as a round edge, and taking the circle center as an original point to establish a coordinate system; presetting the upper limit and the lower limit of the pixel point number of detection targets according to the pixel point number of sprayed production date codes on the qualified bottle cap, utilizing the round edge obtained in the step 4) and the coordinate system which has been established to set the inside of the circle as an region of interest (ROI), taking the sprayed production date codes as the detection targets, and performing bottle cap detection. A algorithm in use is simple, the steps are fewer, quick detection of the image is achieved, the detection efficiency is high, and the method is subjected to a small environmental influence and is high in accuracy.

The invention discloses a liquid silicone rubber aging evaluation method for power station equipment, which is used for judging the aging performance of the liquid silicone rubber outer insulating sheath of the power station equipment, including measuring the hydrophobicity of the liquid silicone rubber and measuring the thickness of the pulverized layer , Specular gloss measurement, tracking and electrical erosion performance test, X-ray photoelectron spectroscopy analysis and X-ray diffraction analysis, and the above measurement results are combined to judge the aging state of liquid silicone rubber. The evaluation method of the present invention has a novel detection method, intuitive detection results, and is easy to be grasped by power station maintenance personnel. It can accurately judge the aging state of liquid silicone rubber used in power station equipment that has been in operation for many years, and evaluate the outer insulating sheath of power station equipment. Whether it can persist in operation, repair or replacement effectively promotes the safe and stable operation of the power system.

The invention discloses a direct current small-current transformer which comprises an annular magnetic iron core allowing a direct current small-current wire to penetrate and surrounded by a winding. The winding is connected with a waveform generator. The waveform generator is connected with a single-chip microcomputer and comprises a first circuit, a second circuit and a comparer, wherein the first circuit and the second circuit are connected in parallel and connected with a power source. The two ends of the winding are connected to the first circuit. The first measurement end of the comparer is connected to the first circuit and the second measurement end of the comparer is connected to the second circuit. The comparer can measure the specific value of data through the first measurement end and the second measurement end, so that the current direction of the power source is changed, the waveform generator generates waves with a certain duty ratio, the waves generated by the waveform generator are received by the single-chip microcomputer, and the volume of the current inside the direct current small-current wire is obtained through change of the duty ratio of the waves. The direct current small-current transformer has the advantages of being small in size, high in accuracy, simple in interface, convenient to install and novel in detection method.

The invention discloses a nuclear leak detector comprising a lens and a body. A light reflector, an encoding template, a vacuum chamber, an optical fiber cone, a second image sensor, a lens group, a first image sensor, a power supply module, an industrial control module, a data acquisition module and a display screen are arranged in the body successively. The lens group is located above the lightreflector. The first image sensor is located above the lens group. The vacuum chamber includes a metal housing disposed between the encoding template and the optical fiber cone, a titanium window disposed on a side of the metal housing and close to the encoding template, a fluorescent screen disposed on the other side of the metal housing and close to the optical fiber cone, and a photocathode anda micro-channel plate that are both disposed in the metal housing and distributed in the direction from the titanium window toward the fluorescent screen. The nuclear leak detector detects nuclear pollution sources efficiently by a new detection method and improves the accuracy of the location display of radioactive sources so as to meet actual nuclear pollution treatment requirements.

The invention discloses a construction method of a mechanical hole filling pile. The construction method particularly comprises the steps of leveling the ground, removing sundries, lofting a pile, embedding a steel pile casing, carrying out drilling construction, cleaning a hole, lifting a reinforcing cage, and pouring concrete, obtaining a filling pile foundation, and detecting the pile foundation. The pile foundation is detected by adopting a method of combing a single pile vertical compression resistance static test with low strain method integrity detection, so that the detection is more complete, and detection data is more complete; the construction method can adapt special terrains such as a mountainous area and an underground flow very well, has the very high adaptability, and is high in construction efficiency; the automation degree is high, and the displacement is flexible and convenient; the construction method is low in noise, low in vibration, large in torque, high in holeforming speed and high in efficiency; the safety performance is high; the construction method is free of mud circulation and is small in environmental pollution; and the construction method is a greenconstruction technology.

The invention discloses a microwave detection method for missed aluminum foil packages and a detector thereof. Missing of objects in an entire box or bag is judged, and whether the aluminum foil package is missed or not is judged through appropriate electrical signal output by utilizing the reflection and transmission characteristics of microwave signals in specific frequency to different objects, and by detecting the amplitude phase characteristic of echo signals. The signal of the oscillator of the detector enters the arm E of a magic T via an isolator, divided into two equiamplitude inversion signals, and respectively transmitted to two antennas through the two main arms of the magic T, two narrow beams are formed and respectively transmitted into two detected pieces in a detected box, and the reflected wave generated by the two detected pieces enters the two antennas. Because a phase shifter is arranged between one of the main arm of the magic T and the antennas, and hollow wave guide is arranged between the other main arm and the antennas, the two echo signals can return to the two main arms of the magic T in phase by adjusting the phase shift amount of the phase shifter, and can be combined into one signal which is then output by the arm H of the magic T and enters a wave detector. The invention has the advantages of precise detection, convenient carrying, no radiation and no hazard of noise.

The invention discloses a hardware fitting machining, punching, inspecting and screening method. The method comprises the steps that conveying is conducted, specifically, accessories needing to be machined are placed on a conveying platform at the top of a machining platform, and conveying rollers rotate to convey the accessories into a limiting machining table; and a hole forming is conducted, specifically, a driving mechanism drives a drill bit to descend and rotate, a hole is formed in the middle of each accessory, and after hole forming is finished, the conveying rollers continue to rotate to convey the accessories to an inclined conveying plate. According to the method, a detecting and screening mechanism is arranged, holes generated after accessory machining are conveniently detected, light rays emitted by downward irradiation of a detecting lamp penetrate through the holes formed in the accessories, a generated aperture and the holes are in a certain proportion, a light ray baffle can shield the generated aperture, the aperture is too large due to the fact that the holes are too large, a light source detection plate is irradiated by the aperture, so that the accessories with overlarge holes are detected and screened more simply and conveniently, a left movable frame and the accessories are driven to move by utilizing a pushing telescopic rod, and the accessories with overlarge holes are pushed out of a discharging opening.

The invention discloses a device and a method for detecting the quality of slurry in a post-tensioned prestressed duct. The slurry quality detection device comprises a corrugated pipe and a resistancedetector; two first connecting holes are formed in the end part of the corrugated pipe, the corrugated pipe at the upper end of each first connecting hole is sleeved with a first metal ribbon, the first metal ribbon is connected with a first conductive assembly, and the end part of the first conductive assembly penetrates through the first metal ribbon and then is connected into the first connecting hole; the first conductive assembly comprises a first outer insulating sleeve and a first conductive copper pipe, the first conductive copper pipe is connected with a first conductive wire, and the first conductive wire is connected with the resistance detector through a resistance instrument connecting wire; the first outer insulating sleeve is filled with insulating glue, and the first conductive copper pipe is arranged in the insulating glue. The detection device can be used for more accurately detecting the concrete filling degree. The slurry quality detection method can be used for more conveniently detecting the compactness of concrete, and is convenient and simple to operate.