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60results about How to "Fast and accurate diagnosis" patented technology

Clustering analysis-based intelligent fault diagnosis method for antifriction bearing of mechanical system

The invention discloses a clustering analysis-based intelligent fault diagnosis method for an antifriction bearing of a mechanical system. A diagnosis model is trained firstly, comprising the following steps: collecting standard vibration signal samples of five fault and normal bearing states of an outer ring, an inner ring, a rolling body and a holding frame; decomposing signals, extracting original vibration signals as well as time domain and frequency domain characteristics of decomposed components to obtain an original characteristic set; removing redundancy by means of a self-weight algorithm and an AP (Affinity Propagation) clustering algorithm to obtain Z optimal characteristics; classifying sample statuses by means of the AP clustering algorithm to obtain a well-trained diagnosis model. A fault diagnosis is performed by the following steps: collecting real-time vibration information of a bearing, decomposing the signals, extracting the optimal characteristics determined by the model, importing the AP clustering algorithm to cluster parameters based on the diagnosis model, comparing with the Z characteristics known in the model to obtain a category of a current unknown signal, so as to complete the fault diagnosis. According to the clustering analysis-based intelligent fault diagnosis method disclosed by the invention, both EEMD (Ensemble Empirical Mode Decomposition) and WPT are utilized to decompose the vibration signals, more refined bearing status information can be acquired, the self-weight algorithm and the AP clustering algorithm increase intelligence of the diagnosis, and therefore accurate diagnosis is ensured.
Owner:GUILIN UNIV OF ELECTRONIC TECH

Turbo generator set vibration fault diagnosis method based on forward reasoning

The invention discloses a turbo generator set vibration fault diagnosis method based on forward reasoning. After a diagnosed turbo generator set starts, a parameter detection device is employed to carry out real-time detection on related work parameters in a start and operation process of the diagnosed turbo generator set and synchronously sends the detection information to a vibration fault diagnosis device for automatic vibration fault diagnosis, vibration faults of the diagnosed turbo generator set are diagnosed level by level by the vibration fault diagnosis device according to the detection result transmitted by the parameter detection device in combination with the active power value of the diagnosed turbo generator set, and the fault diagnosis process comprises steps of 1, shaft vibration swinging value diagnosis; 2, start process vibration fault diagnosis; 3, zero load operation vibration fault diagnosis; and 4, loaded operation vibration fault diagnosis. The method is advantaged in that the steps are simple, and the method is reasonable in design, is convenient to realize, has good use effects, can conveniently and rapidly accomplish the online steam turbine vibration fault diagnosis process and can further realize accurate and reliable diagnosis results.
Owner:XIAN XIRE VIBRATION INST CO LTD

Pulse signal processing for pulse diagnosis in traditional Chinese medicine

The invention relates to pulse signal processing for pulse diagnosis in traditional Chinese medicine (TCM). A TCM pulse diagnosis device according to the invention comprises an input unit, a processing unit and a display terminal, wherein the input unit is used for receiving user input; the processing unit is used for determining the state of pulse condition elements according to characteristic parameters of a pulse waveform of an examined object; and a display screen of the display terminal consists of a first region for displaying the pulse waveform of the examined object, and a second region for displaying the state of the group of pulse condition elements of the examined object. By means of displaying the waveform of pulse signals and the state of the pulse condition elements on the display screen at the same time, a professional can acquire firsthand information of the pulse signals simply and clearly. In addition, the provided season and time when the pulse signals are acquired ensure that the professional can make a more complete diagnosis result. Furthermore, by means of mapping the characteristic parameters of the pulse signals, of which the values are obtained continuously, into the discrete state of the pulse condition elements, a transformed signal processing result is in better conformity with the thinking mode of the TCM diagnosis, so that the usage of the professional is facilitated.
Owner:GE MEDICAL SYST GLOBAL TECH CO LLC

Fully mechanized coal mining face coal cutter automatic height-adjustment control method based on current monitoring

The invention discloses a fully mechanized coal mining face coal cutter automatic height-adjustment control method based on current monitoring. The fully mechanized coal mining face coal cutter automatic height-adjustment control method based on current monitoring includes the steps that firstly, a coal cutter mining work condition monitoring system is built, specifically, the built coal cutter mining work condition monitoring system comprises a sound intensity detection device, a lower monitoring device installed on a coal cutter and an upper monitoring machine arranged in an upper monitoring room; and secondly, automatic height-adjustment control over the coal cutter is carried out, specifically, the coal cutter is used for mining a coal seam to be mined in the work face advancing direction from back to front; and when any mining position of a current work face is mined, the coal cutter mining work condition monitoring system is used for carrying out coal cutter automatic height-adjustment control, and the process is as follows: information detection and synchronous unloading of cutting current, traction current and sound intensity of the coal cutter, cutting work condition diagnosis, coal cutter height-adjustment judgment and cutting height adjustment of the coal cutter. The fully mechanized coal mining face coal cutter automatic height-adjustment control method based on current monitoring is simple in step, reasonable in design, easy and convenient to realize, good in use effect and capable of carrying out accurate control over coal cutter height adjustment automatically in real time.
Owner:XIAN UNIV OF SCI & TECH

Coal cutter height-adjustment remote control method based on virtual reality

The invention discloses a coal cutter height-adjustment remote control method based on virtual reality. The coal cutter height-adjustment remote control method based on virtual reality includes the steps that firstly, a coal cutter mining work condition monitoring system is built, specifically, the built coal cutter mining work condition monitoring system comprises a sound intensity detection device, a lower monitoring device and an upper monitoring machine; secondly, a three-dimensional model is built; and thirdly, synchronous simulation of coal seam mining and the mining process is carried out, specifically, a coal cutter is used for mining a coal seam to be mined in the work face advancing direction from back to front; and when any mining position of a current work face is mined, the process is as follows: information detection and synchronous unloading of actual mining work conditions of the coal cutter, cutting work condition diagnosis, coal cutter height-adjustment judgment, cutting height adjustment of the coal cutter and synchronous simulation of the mining work conditions of the coal cutter. The coal cutter height-adjustment remote control method based on virtual reality is simple in step, reasonable in design, easy and convenient to realize, good in use effect and capable of carrying out remote control over coal cutter height adjustment automatically in real time and synchronous simulation of the mining work conditions of the coal cutter.
Owner:XIAN UNIV OF SCI & TECH

State monitoring and defect simulation system for electrical insulation performance of oil-immersed bushing

The invention discloses a state monitoring and defect simulation system for the electrical insulation performance of an oil-immersed bushing, and the system comprises an oil pressure monitoring modulewhich is used for monitoring the pressure of insulating oil in the oil-immersed bushing; a vibration characteristic monitoring module which is used for monitoring the vibration frequency and amplitude of the oil-immersed sleeve in the operation process; a discharge characteristic monitoring module which is used for judging whether the oil-immersed bushing is in a normal operation state or not bytesting the magnitude of partial discharge pulse current at the end part of the oil-immersed bushing and a discharge spectrum; a discharge phenomenon observation module which is used for observing theposition of a discharge point in the oil-immersed bushing and recording a discharge process image and animation at the discharge moment; and a dielectric response test module which is used for evaluating the insulation condition of the insulation material or the insulation equipment by changing the frequency of the alternating current excitation, taking complex capacitance and dielectric loss asfunctions of the frequency and using the change condition of the functions. According to the invention, comprehensive monitoring and analysis of electrical and mechanical property characteristic parameters can be carried out on defects.
Owner:STATE GRID SHAANXI ELECTRIC POWER RES INST +2

A shield machine failure monitoring and early warning system and method

The invention discloses a shield machine failure monitoring and early warning system and method. The system includes a host monitoring machine, a shield machine working condition detection device for real-time monitoring of the working condition information of the monitored shield machine, The controlled early warning prompt device and the timing circuit connected with the upper monitoring machine, the early warning prompt device is connected with the upper monitoring machine; the working condition detection device of the shield machine includes the main bearing working condition detection for real-time monitoring of the working condition of the main bearing of the shield machine device, a cutterhead detection device for real-time monitoring of the shield machine cutterhead, and a cutterhead drive detection device for real-time monitoring of the working conditions of the cutterhead drive system; the method includes steps: step 1, shield machine working condition monitoring and The monitoring information is uploaded synchronously; 2. Analysis and processing of shield machine working condition information. The invention can timely and accurately monitor the faults existing in the shield machine, and can give early warning prompts according to the monitoring results.
Owner:CHINA RAILWAY FIRST GRP CO LTD +1

Diagnostic equipment for suspected tuberculosis and image processing method thereof

The invention discloses diagnostic equipment for suspected tuberculosis. The diagnostic equipment comprises a control device and an input device, an output device and a power supply device which are connected with the control device in series respectively, wherein the control device is an STC12C5A60S2 series singlechip microcomputer, the input device is a keyboard and a PC interface circuit, and the output device is a speech output device; and by the image processing method, the image information is divided into three categories, totally eight types of characteristics, a value corresponding to each type of characteristics is set, the values corresponding to the three categories of characteristics are summed to give a result value, the result value is divided into three value intervals, and one image processing result corresponding to each interval is outputted. When the diagnostic equipment is used for non-professional tuberculosis prevention and control organizations, a finding rate of patients suffering tuberculosis is improved, the spread of tuberculosis among people is avoided, a misdiagnosis rate and a rate of missed diagnosis are both greatly lowered, the work load of medical staff in the X-ray department, the working efficiency is improved, and the information on the medical staff making the diagnosis is also recorded in order to apply a responsibility system and strengthening the sense of responsibility of the medical staff.
Owner:陈卫

Method for typing chronic sinusitis based on digital pathological slide and system thereof

ActiveCN110728666AImprove efficiencyImproving the Pathological Diagnosis Level of Nasal PolypsImage enhancementImage analysisActivation functionBiomedical engineering
The invention discloses a method for typing chronic nasosinusitis based on a digital pathological slide. The method comprises the following steps: acquiring an image, namely acquiring a digital pathological image from the chronic nasosinusitis nasal polyp slide, and sketching to generate a large mask image; preprocessing the image to obtain a small pathological image and a small mask image; establishing training set data; establishing a deep learning quantitative prediction module; training on an ImageNet data set by adopting an Inception V3 model to obtain model parameters; removing the lastfull-connection layer FC of the model, adding a full-connection layer FC, only one neuron being arranged in the full-connection layer FC, not using activation function, setting a loss function to adopt a mean square error MSE, and setting a learning rate lr; integrating the eosinophilic granulocyte proportion values of all the small pathological pictures on the slide to obtain a final auxiliary diagnosis result. The invention also discloses a system thereof. According to the method, the eosinophilic granulocyte proportion on the pathological picture is rapidly obtained through learning and training, and an objective and high-accuracy auxiliary diagnosis result is given.
Owner:THE THIRD AFFILIATED HOSPITAL OF SUN YAT SEN UNIV +1

Control method for automatic height adjustment of coal cutter rollers

InactiveCN107013211AMeet height control requirementsRealize remote monitoringDriving meansControl engineeringTime control
The invention discloses a control method for the automatic height adjustment of coal cutter rollers. The method comprises the following steps: a front hydraulic lifting platform is arranged at the front part of a coal cutter body; a rear hydraulic lifting platform is arranged at the rear part of the coal cutter body; a front lifting oil cylinder is arranged below the front hydraulic lifting platform; a rear lifting oil cylinder is arranged below the rear hydraulic lifting platform; a first displacement detection unit is arranged on the front hydraulic lifting platform; a second displacement detection unit is arranged on the rear hydraulic lifting platform; a first height adjustment oil cylinder is arranged on a front swing arm; a rear height adjustment oil cylinder is arranged on a rear swing arm; a first height detection unit is arranged on a front cutting roller; and a second height detection unit is arranged on a rear cutting roller. The height adjustment control method has the advantages of reasonable design, simplicity, fastness and accuracy in the diagnosis of the cutting condition of coal cutters in various exploitation positions, realization of automatic real-time control of the height adjustment of the coal cutter by automatically adopting a corresponding height adjustment control scheme, and realization of remote monitoring of the coal cutter.
Owner:TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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