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641 results about "Life detection" patented technology
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Ground fault circuit interrupter with end of life indicators
InactiveUS7195500B2Freedom of movementProtective switch detailsSwitch operated by falling currentLife detectionLife time
The present invention provides a GFCI that not only has ground fault protection, but also is capable of providing reverse wiring protection as well as detection of end of the service life of the GFCI by way of utilizing an end of life detection control circuit in connection with the reset button. In addition, the GFCI of the present invention provides a forcible mechanical tripping assembly by way of utilizing the test button. Finally, the present invention provides method for detecting whether the service life of the GFCI has ended.
Owner:HUANG HUADAO
Ground fault circuit interrupter containing a dual-function test button
Owner:HUANG HUADAO
FMCW broadband life detection radar breathing and heartbeat signal extraction algorithm
ActiveCN106821347AAccurate frequency componentsMaintain energySensorsMeasuring/recording heart/pulse rateAdaptive filtering algorithmCoiflet
The present invention provides an FMCW broadband life detection radar breathing and heartbeat signal extraction algorithm. Compared with the prior art, the algorithm has the advantages that breathing and heartbeat signals of multiple persons can be obtained simultaneously, the boundaries and energy of reconstructed breathing signals can be very well kept by using Coiflets wavelets compared with traditional frequency-domain filtering, especially processing conducted on short-time signals is obvious, higher harmonics of the breathing signals are filtered out by adopting a double-coefficient based LMS self-adaptive filtering algorithm, and the self-adaptive filtering algorithm does not need additional reference signals. Due to the fact that a degressive search step size coefficient is adopted in the algorithm, the heartbeat signals can be better retained while breathing signal harmonics are filtered out, the heartbeat signals can be rapidly converged by selecting the appropriate search step size coefficient and adopting the double-coefficient based LMS self-adaptive filtering algorithm, and smaller stable imbalance is kept in longer time, so that finally separated heartbeat signals are more accurate in frequency component within a long time.
Owner:ARMY MEDICAL UNIV
Ground fault circuit interrupter containing a dual-function test button
InactiveUS7289306B2Protective switch detailsSwitch operated by earth fault currentsElectricityLife detection
Owner:HUANG HUADAO
Ground fault circuit interrupters providing end of the life test
InactiveUS7315227B2Automatic testingAvoid resetProtective switch detailsSwitch operated by earth fault currentsElectrical conductorEngineering
This invention discloses a ground fault circuit interrupter capable of detecting its end of life, and is characterized by: a pair of flexible metal sheets connected to the power output end are added on the circuit board of the interrupter, and there is a pair of moving contacts on the metal sheets; there are two pairs of fixed contacts on the power output conductors; the two pairs of fixed contacts on the power output conductors respectively correspond to the moving contacts on the power input metal sheets and the moving contacts on flexible metal sheets, thus forming two groups and four pairs of switches. There is also a tripping apparatus on the circuit board, which can release / trip the interrupter, thus cutting off the power output of the interrupter. An end of life detection circuit has also been added to the circuit board. After the interrupter is energized, various components in the interrupter are automatically detected. If it is found that the interrupter has come to the end of its life, the reset button will be prevented from resetting, so that neither the load end of the interrupter nor the power output holes on the surface of the interrupter have any power output. This invention has powerful applications, with sound safety precautions, thus effectively ensuring the personal safety of the user as well as the safety of the appliances.
Owner:HUANG HUADAO
Ground fault circuit interrupter containing a dual-function test button
The present invention provides a circuit interrupting device, preferably a ground fault circuit interrupter (GFCI), which contains a dual-function test button having a short pole and a long pole positioned underneath the dual-function test button. When the GFCI is properly wired and powered, a depression of the dual-function test button allows the short pole to operatively connect to a conductive pin and generate a leakage current to test the components of the GFCI. If all of the components are functioned properly, the GFCI can be reset. If not, the GFCI cannot be reset. When the GFCI is miswired or reverse wired and not powered, a depression of the dual-function test button does not test the components of the GFCI. However, a further depression of the dual-function test button allows the long pole presses against a tripping lever on a locking member in a tripping device which mechanically trip the GFCI. The present invention further provides an end-of-life detection circuit which can automatically generates a simulated leakage current to test the components in the GFCI. If one or more components are not functioned properly, the end-of-life circuit prevents the GFCI from resetting.
Owner:HUANG HUADAO
Circuits for circuit interrupting devices having automatic end of life testing function
InactiveUS20070014068A1Circuit-breaking switches for excess currentsProtective switch detailsEngineeringLife testing
The present invention provides a set of circuits which is capable of performing an automatic check on main components of a circuit interrupting device when the circuit interrupting device is properly powered and the device is at a tripped state to determine whether these main components function normally. The results of the automatic check can be detected by depressing a reset button in the circuit interrupting device. If the reset button can be depressed, the main components function normally. Alternatively, the results can be automatically displayed by a showing on the face lid of the circuit interrupting device of either a green light, which means that the main components function normally, or a red or yellow light or no light, which means that at least one of the main components in the circuit interrupting device does not function properly. The present invention also provides an end-of-service-life detection integrated circuit chip capable of receiving and transmitting an automatic check signal and determining whether or not the circuit interrupting device can be reset. The preferred circuit interrupting device is a ground fault circuit interrupter (GFCI).
Owner:HUANG HUADAO
Receptacle circuit interrupting devices providing an end of life test controlled by test button
InactiveUS7538993B2Protective switch detailsSwitch operated by falling currentElectricityControl signal
The present invention provides a circuit interrupting device which can test the conditions of the components in the circuit interrupting device (i.e., the end-of-life test) through the depression of a test button. The circuit interrupting device also possesses reverse wiring protection, including the ability to cutoff power on the user accessible plugs of the face plate when the device is reverse wired or miswired. The circuit interrupting device contains a test button, a reset button, and a series of circuits (including, but not limited to, a main control circuit, an end-of-life detection circuit, and a reset / trip circuit). A depression of the test button generates a simulated fault, which is detected by the main control circuit. When the components in the main control circuit work properly, a control signal is generated by the main control circuit and transmitted to the end-of-life detection circuit to activate the reset / trip circuit and generated an indication signal. After the indication signal is displayed, the reset button is able to be depressed, which sends a signal to the end-of-life detection circuit, which in turn forwards the signal to the reset / trip circuit to reestablish the electrical continuity of the circuit interrupting device.
Owner:HUANG HUADAO
Single-channel UWB-based radar type life detection instrument for multi-target detection
InactiveCN102008291AThe target's weak vital signs are enhancedDiagnostic recording/measuringSensorsIntegratorAudio power amplifier
The invention discloses a single-channel ultra-wide bandwidth (UWB)-based radar type life detection instrument for multi-target detection. The life detection instrument comprises a UWB biologic radar front end and a calculating unit, wherein the UWB biologic radar front end comprises a transmitting antenna, a receiving antenna, a pulse oscillator, an electromagnetic pulse generator and a sampling integrator; the pulse oscillator generates a pulse signal; the signal triggers the electromagnetic pulse generator to generate a narrow pulse and radiates the narrow pulse out through the transmitting antenna; a reflected signal is transmitted to the sampling integrator through the receiving antenna; a pulse signal generated by the pulse oscillator simultaneously generates a distance gate through a delay circuit and a distance gate generator to select a received signal; the signal passes through a sampling integration circuit; a weak signal is detected after accumulation, amplified and filtered by an amplifier and a filter, sampled by a high-speed analogue / digital (A / D) acquisition card and transmitted to the calculating unit; and the acquired signal is analyzed by the calculating unit to extract life information and each target distance of multiple human targets.
Owner:FOURTH MILITARY MEDICAL UNIVERSITY
Lead storage battery accelerated life detection method
ActiveCN104237798AReduce consumptionShorten detection timeElectrical testingProcess engineeringLife detection
The invention discloses a lead storage battery accelerated life detection method. According to the method, a lead storage battery is subjected to high-temperature environmental detection, and a pulse is added in the detection process, so that a detected result is approximate to a result of a 100% DOD life test at the normal temperature, and the cycle life of the lead-acid storage battery can be tested and estimated more quickly; the whole detection period is about 2-4 months, the detection time is remarkably shortened, data are true, the performance of the battery can be evaluated, and the speed of researching and developing new technologies and new products by an enterprise or a research and development unit can be remarkably increased.
Owner:ZHEJIANG TIANNENG BATTERY JIANGSU NEW ENERGY
Ballast control IC with multi-function feedback sense
ActiveUS7154232B2Avoid component damageEnd of lifeElectrical apparatusElectric light circuit arrangementLife detectionControl theory
A multi-function feedback sense input in an electronic ballast control indicates a number of lamp faults on the basis of lamp parameters exceeding specified thresholds. An end of life detection is achieved by conditioning a lamp feedback with a DC offset to provide a simple threshold comparison to determine if the lamp exceeds specified operational boundaries. An open filament, absent lamp or broken cathode is detected on the same feedback sense by detecting an open circuit in the lamp filament and driving the sense feedback to a shutdown state in the event of a filament open circuit. The ballast control includes a current sense feedback for detecting overcurrent conditions as well as lamp faults so that the control detects an end of life condition, lamp absence, broken lamp, open filament, broken cathode, overcurrent, hardswitching or failure to ignite fault with a minimum number of feedback sensors. The ballast control provides a number of protections with a simplified circuit to reduce cost and improve functionality of the electronic ballast control.
Owner:INFINEON TECH AMERICAS CORP
Optical fiber grating strain sensor calibration and wear detection system
InactiveCN107036543AGuaranteed accuracyGuaranteed repeatabilityUsing optical meansGratingLife detection
The present invention provides an optical fiber grating strain sensor calibration and wear life detection method, including the steps: a) building a testing system in which a broadband light source, an optical circulator, an optical fiber grating demodulation instrument, a single mode fiber, a Bragg optical fiber grating sensor, an optical fiber, a resistance strain gauge, a fixture, a constant strength cantilever beam and a strain acquisition device are connected in sequence; b) exerting loads on the constant strength cantilever beam through a linear actuator to subject the constant strength cantilever beam to produce strain; c) through the resistance strain gauge, acquiring the magnitude of the resistance change of the strain gauge; d) through the optical fiber grating demodulation instrument, accessing the peak translation of the reflected light of the Bragg optical fiber grating sensor generated by the strain caused by the constant strength cantilever beam; and e) calculating the relationship between the strain of the cantilever beam and the peak translation of the reflected light of the Bragg optical fiber grating sensor to realize the calibration and wear detection of the Bragg optical fiber grating sensor.
Owner:BEIJING INFORMATION SCI & TECH UNIV
Ultra-wide bandwidth microwave chaos life detection radar device
ActiveCN104765031ARapid and accurate detectionHigh range resolutionCatheterRadio wave reradiation/reflectionLife detectionVoltage control
The invention relates to a life detection radar device, in particular to an ultra-wide bandwidth microwave chaos life detection radar device for detecting human body life feature information and distance information. The ultra-wide bandwidth microwave chaos life detection radar device can be used for disaster rescue and comprises a first signal generator, a first power splitter, a frequency mixer, a power amplifier, an ultra-wide bandwidth emitting antenna, an ultra-wide bandwidth receiving antenna, a low noise amplifier, an I / Q demodulator, a second signal generator, a second power splitter, a voltage-controlled phase shifter, an adjustable attenuator, a solid state microwave sensor, a third signal generator, a phase-locked amplifier and a signal collecting and processing module. The life feature information and the position information of trapped persons can be rapidly and accurately detected.
Owner:TAIYUAN UNIV OF TECH
Vehicle safety monitoring system based on internet of vehicles
The invention discloses a vehicle safety monitoring system based on the internet of vehicles. The vehicle safety monitoring system is characterized by comprising a panorama camera, a temperature sensor, a vibration sensor and a life detection instrument which are arranged on a vehicle and connected with a vehicle body controller, and the vehicle body controller is connected with a wireless communication unit; the wireless communication unit transmits the information of all monitoring terminals to a server arranged on a vehicle manufacturer through a wireless network, and the server communicates with a mobile phone terminal of a user to monitor and control the vehicle. According to the vehicle safety monitoring system based on the internet of the vehicles, the structure is adopted, an existing safety system is integrated, positive wakeup can be conducted when outside invasion of the vehicle occurs or safety hazards in the vehicle exist, corresponding reminding or positive risk avoiding is made actively according to the magnitude of the danger coefficient, and a vehicle owner is reminded through the mobile network; and the vehicle owner can take onsite video or pictures and receive remote control operation of the vehicle.
Owner:CHERY AUTOMOBILE CO LTD
Mine environmental monitoring and rescue management system based on UWB technology
InactiveCN104244175AAccurately judge the state of lifeHigh positioning accuracyMining devicesLocation information based serviceEngineeringLife detection
The invention discloses a mine environmental monitoring and rescue management system based on the UWB technology. Ethernet architecture is adopted for the system, each downhole positioning base station is provided with a positioning module and an environmental monitoring module, data of the positioning base station are uploaded to a ground monitoring center through Ethernet, and each positioning tag is provided with a positioning module and a life state monitoring module. The system effectively integrates environmental monitoring, positioning and life detection, comprehensive rescue information can be provided for making a rescue scheme, and the rescue efficiency is improved.
Owner:HUNAN TIANGUAN ELECTRONICS INFORMATION TECH
Mining wireless network communication system based on technology of internet of things
ActiveCN103124288ALow costEasy and user-friendly installationEnergy efficient ICTMining devicesVideo monitoringCommunications system
The invention relates to a mining wireless network communication system based on technology of an internet of things. The mining wireless network communication system comprises an application layer, a transmission layer and a sensing layer. The application layer comprises a voice server, a locating server, a video monitoring management server, a coal mine safety production scheduling server and an emergency command server, wherein the voice server, the locating server, the video monitoring management server, the coal mine safety production scheduling server and the emergency command server are connected with a network center switchboard. The transmission layer comprises a wireless network switching system connected with the network center switchboard. The sensing layer comprises a plurality of intelligent terminals arranged underground or on the ground and connected with the wireless network switching system in the transmission layer in wireless mode. By means of the mining wireless network communication system, real-time precise locating, bi-directional mobile communication and video monitoring of staff are achieved. During an emergency situation, emergency early warning can be conducted, communication can be recovered fast, life detection can be conducted, and miners in distress can be searched and rescued. Simultaneously, wires such as cables and optical fibers are saved, materials and energy are saved, and potential safety hazards are reduced.
Owner:晁顶 +2
Ground fault circuit interrupter containing a dual-function test button
InactiveUS20070076337A1Protective switch detailsSwitch operated by earth fault currentsElectricityEngineering
The present invention provides a circuit interrupting device, preferably a ground fault circuit interrupter (GFCI), which contains a dual-function test button having a short pole and a long pole positioned underneath the dual-function test button. When the GFCI is properly wired and powered, and preferably in a reset state, a first-level depression of the dual-function test button allows the short pole to close a flexible switch (KT) to electrically connect a power input end to a power output end and generate a leakage current to test the components of the GFCI. If all of the components are functioned properly, the GFCI can be reset. If not, the GFCI cannot be reset. When the GFCI is miswired or reverse wired and not powered, the first-level depression of the dual-function test button does not test the components of the GFCI. However, a second-level depression of the dual-function test button allows the long pole presses against a tripping lever on a locking member in a tripping device which mechanically trip the GFCI. The present invention further provides an end-of-life detection circuit which can automatically generates a simulated leakage current to test the components in the GFCI. If one or more components are not functioned properly, the end-of-life circuit prevents the GFCI from resetting.
Owner:HUANG HUADAO
Receptacle circuit interrupting devices providing an end of life test controlled by test button
InactiveUS20070041134A1Protective switch detailsSwitch operated by falling currentControl signalHemt circuits
The present invention provides a circuit interrupting device which can test the conditions of the components in the circuit interrupting device (i.e., the end-of-life test) through the depression of a test button. The circuit interrupting device also possesses reverse wiring protection, including the ability to cutoff power on the user accessible plugs of the face plate when the device is reverse wired or miswired. The circuit interrupting device contains a test button, a reset button, and a series of circuits (including, but not limited to, a main control circuit, an end-of-life detection circuit, and a reset / trip circuit). A depression of the test button generates a simulated fault, which is detected by the main control circuit. When the components in the main control circuit work properly, a control signal is generated by the main control circuit and transmitted to the end-of-life detection circuit to activate the reset / trip circuit and generated an indication signal. After the indication signal is displayed, the reset button is able to be depressed, which sends a signal to the end-of-life detection circuit, which in turn forwards the signal to the reset / trip circuit to reestablish the electrical continuity of the circuit interrupting device.
Owner:HUANG HUADAO
Mobile health and life signs detector
ActiveUS20050225448A1Slow changeQuickly and easily understoodElectrocardiographySensorsGeneral purposeBiological body
A life detector adapted to be used to determine whether an organism or part thereof suits a life condition predefined by a set of ranges, each for a physiological parameter and each characterizing this life condition. The detector comprises a sensor unit adapted to sense at least two of the physiological parameters and to generate signals indicative of their values, a processor for receiving and processing the signals to arrive at these values, the processor further being adapted to disregard any value falling outside the range of the respective parameter and to produce a qualitative diagnosis based on values falling within its range. This diagnosis is indicative of whether the organism or part thereof suits the life condition. The detector further comprises indication means adapted to indicate the diagnosis. The detector may be assembled using a general-purpose programmable communication device, a standard medical sensor and a special cable adapter.
Owner:SCHENKER ERAN
An unmanned aerial vehicle life detection method based on multi-source information fusion
PendingCN109558848AEfficient detectionRealize wide range cruiseScene recognitionBiometric pattern recognitionInterference resistanceRadar
The invention discloses an unmanned aerial vehicle life detection method based on multi-source information fusion, and the method comprises the steps: S1, enabling an unmanned aerial vehicle to carrya multi-source sensor for the detection and search of a target area, and enabling the multi-source sensor to comprise a radar sensor, a visible light image sensor, and an infrared thermal image sensor; S2, respectively receiving and preprocessing the radar image, the visible light image and the infrared image to obtain a preprocessed radar image, a preprocessed visible light image and a preprocessed infrared image; and S3, carrying out image registration on the preprocessed visible light image and the infrared image, carrying out fusion, carrying out secondary fusion on a fusion result and theradar image, and outputting a target detection result. The method has the advantages of being simple in implementation method, high in interference resistance and environmental adaptability, high indetection efficiency and precision and the like.
Owner:HUNAN NOVASKY ELECTRONICS TECH
Protective device with automated self-test
InactiveUS20110148423A1Circuit-breaking switches for excess currentsProtective switch detailsElectricityLife detection
Owner:PASS SEYMOUR
UWB bio-radar-based multiple-human body object estimation method and system
InactiveCN103616729AImprove the level ofImprove abilitiesDetection using electromagnetic wavesRadio wave reradiation/reflectionHuman bodyEstimation methods
The invention discloses a UWB bio-radar-based multiple-human body object estimation method and a UWB Bio-radar-based multiple-human body object estimation system, and belongs to the technical field of bio-radar biological life detection. According to the UWB bio-radar-based multiple-human body object estimation method of the invention, echo data obtained through collection are processed through the following manners that: a breath detection algorithm, an adaptive cancellation method and a target recognition algorithm are adopted to process the echo data in each channel; correlation processing is performed among each channel according to processing results; and finally, threshold values are set such that clutter left in the channels after processing can be removed, and at the same time, target classification and number estimation are realized. With the UWB bio-radar-based multiple-human body object estimation of the invention adopted, a technological base can be provided for further implementation of bio-radar detection and positioning of multiple human body objects, and the improvement of the level and ability of bio-radar technique to obtain information of human bodies can be facilitated.
Owner:FOURTH MILITARY MEDICAL UNIVERSITY
Lubricating oil service life detection method, device and system for engine
InactiveCN105298587ADetermination of lifeTimely test resultsLubrication indication devicesThermodynamicsLife detection
The invention provides a lubricating oil service life detection method and device for an engine. The method includes the steps that after the engine is started, when the rotating speed of the engine is lower than a preset rotating speed, the temperature and pressure of lubricating oil are detected; when the temperature is higher than a preset temperature and the pressure is lower than preset pressure, at least two sets of working condition parameters are obtained, and the working condition parameters comprise the rotating speed of the engine and the pressure and the temperature of the lubricating oil; by means of the measured working condition parameters, the viscosity of the lubricating oil is obtained according to the relations between the viscosity of the lubricating oil and the rotating speed, the temperature and the pressure; and according to the viscosity of the lubricating oil, the service life of the lubricating oil is determined. According to the embodiment, online detection of the service life of the lubricating oil is achieved, a detection result can be obtained in time, and detection time is shortened.
Owner:WEICHAI POWER CO LTD
Power battery life detection method and device
ActiveCN104965180AAvoid the problems of inaccurate detection results and poor experiment effectivenessElectrical testingNameplate capacityPower battery
The embodiment of the invention discloses a power battery life detection method and device, and relates to the technical field of a power battery. The method comprises the steps that a dynamic average is obtained according to driving condition data so that the simplified condition data of the driving condition data are obtained; a power battery discharge strategy is confirmed according to the current change data in the simplified conditions; constant current charging is repeatedly performed on the power battery on an electric automobile for multiple times, and discharging is performed according to the power battery discharge strategy; and if the current capacity of the power battery is attenuated to a percentage, which is less than a preset percentage, of the initial rated capacity of the power battery the cycling charge and discharge process, the number of cycles of charge and discharge of the power battery is confirmed and the number of cycles acts as the cycle life of the power battery. Problems of inaccurate detection results and poor experiment effectiveness when the power battery life is detected by a present constant current charge and discharge experiment mode without considering the actual driving conditions can be solved.
Owner:ELECTRIC POWER RES INST STATE GRID JIBEI ELECTRIC POWER COMPANY +2
Air purifying equipment and life detection method and device for filter screen in air purifying equipment
InactiveCN107860695AAccurately assess service lifeAvoid problems such as too frequent replacementDispersed particle filtrationPermeability/surface area analysisAir volumeAir cleaning
The invention discloses air purifying equipment and a life detection method and device for a filter screen in the air purifying equipment. The life detection method comprises the following steps: acquiring the filtering efficiency and the filtering air volume percent of a filter screen, as well as the concentration of a target pollutant in air and the ventilation quantity and the running time of the air purifying equipment; according to the filtering efficiency and the filtering air volume percent of the filter screen, the concentration of the target pollutant in air and the ventilation quantity and the running time of the air purifying equipment, calculating the cumulative purification quantity M of the air purifying equipment; according to the cumulative purification quantity M of the air purifying equipment, calculating the clean air delivery ratio CADR of the air purifying equipment; judging whether CADR is smaller than a preset threshold; and if the CADR is smaller than the presetthreshold, sending prompt information to remind a user of replacing the filter screen. According to the life detection method, the actual service life of the filter screen in the air purifying equipment can be accurately estimated, the using effect of the filter screen is guaranteed, and the market competitiveness of the air purifying equipment is helped to be improved.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD
Through-wall ultra-wideband radar human body respiration signal detection method based on Faster-RCNN network
ActiveCN109031287AInsufficient avoidance of misjudgmentImprove signal-to-noise ratioRespiratory organ evaluationSensorsPattern recognitionData set
The invention discloses a through-wall ultra-wideband radar human body respiration signal detection method based on a Faster-RCNN network. The method comprises the following steps: performing denoising and weak signal enhancement preprocessing on an original slow time-distance two-dimension ultra-wideband radar echo signal; and then continuously performing signal enhancement and denoising on the processed echo by adopting an Advance Normalisation method; imaging the echo signal in the preprocessing process as a gray image by adopting MATLAB, wherein the image width is corresponding to the echoslow time direction, and the image height is corresponding to the echo distance direction; and screening the obtained gray image, annotating a data set, and training a Faster-RCNN network model to perform human body respiration weak signal identification. The method disclosed by the invention is high in identification accuracy rate, high in detection speed, and capable of providing better technical support for the radar echo target detection, the life detection and practical technologies in actual applications.
Owner:XI AN JIAOTONG UNIV
Multi-target life detection method based on radar signal and detection radar
ActiveCN109521422ASolve energy attenuationReduce the probability of misjudgmentRadio wave reradiation/reflectionUltrasound attenuationTransfer procedure
The invention discloses a multi-target life detection method based on a radar signal and a detection radar. Time accumulation is carried out on a pre-processed echo signal in a slow time direction toacquire a first echo signal. The first echo signal is subjected to inflection point envelope extraction to acquire a second echo signal. The average value of all amplitude signals other than M mark amplitude signals in the second echo signal is acquired. If the ratio of the mark amplitude signals to the average value is greater than a threshold value, a life target is at the radar detection distance corresponding to the mark amplitude signals. According to the life detection method provided by the invention, a normalization method is used to normalize the radar signal amplitude in the fast time (distance) dimension; the problem of energy attenuation caused by the increase of the radar signal with distance in the process of transmission is solved; the missed rate of a far-end target is effectively reduced; and the method of two inflection point envelope extraction is used to improve the multi-target axial recognition accuracy.
Owner:FOURTH MILITARY MEDICAL UNIVERSITY
Mobile terminal, life detection instrument, post-disaster search and rescue system and method
ActiveCN101917692AHigh penetration rateImprove search and rescue efficiencyPosition fixationMaterial analysis by optical meansPost disasterTime delays
The invention provides a mobile terminal, a life detection instrument, a post-disaster search and rescue system and a post-disaster search and rescue method. The mobile terminal can be switched to an emergency control mode by an active and / or passive mode(s) and positioned by the life detection instrument by a three-point or multi-point positioning mode. The method comprises the following steps of: establishing an emergency link connection between the mobile terminal and the life detection instrument and switching the mobile terminal to the emergency control mode; generating a distress signal by the mobile terminal according to a preset rule, spreading a spectrum by using a spectrum spreading code and transmitting the signal to the life detection instrument, wherein the distress signal at least comprises a unique identifier of the mobile terminal; transmitting a positioning control signal to the mobile terminal after the life detection instrument receives the distress signal; transmitting a positioning signal by the mobile terminal; and calculating the position of the mobile terminal according to time delay of the positioning signals received by three or more life detection instruments arranged around the mobile terminal. The embodiment of the invention can also realize accurate positioning to improve the search and rescue efficiency.
Owner:吕笑 +2
Multi-feature and phase space-based dynamic prediction method of life of antifriction bearing
ActiveCN106248381AEffective Life PredictionComprehensive Life PredictionMachine bearings testingPerformance indexLife detection
Provided is a multi-feature and phase space-based dynamic prediction method of life of an antifriction bearing. The dynamic prediction method comprises steps of firstly, obtaining vibration signals of antifriction bearings, extracting time domain and frequency domain features of the antifriction bearings and carrying out standardization and slipping processing so as to obtain relative feature indexes; then, using the PCA technology to fuse the multiple feature indexes, obtaining a comprehensive attenuation performance index and carrying out life detection; then, carrying out space reconstruction on the comprehensive attenuation performance index in a history degenerative process, and comparing the history degenerative process with a current degenerative process in a phase space so as to obtain predicted invalid time; matching and combining the predicted invalid time with history invalid time, estimating the probability density distribution thereof, and calculating average life; and continuously accumulating and expanding by analyzing samples to obtain average life at different observation moments. According to the invention, effects of multiple factors in a degenerative process of the antifriction bearing can be effectively reflected; the prediction method is free from restriction of hypothesis conditions; prediction errors are reduced; and dynamic and precise prediction of life can be achieved.
Owner:XI AN JIAOTONG UNIV
Lithium ion battery cycle life detection device and lithium ion battery cycle life assessment method
PendingCN107748338ACycle Life AssessmentThe test result is accurateElectrical testingElectrical batteryEngineering
The present invention provides a lithium ion battery cycle life detection device and a lithium ion battery cycle life assessment method. The lithium ion battery cycle life detection device comprises two bottom plates and pressure sensors, the two bottom plates are arranged parallelly, and a to-be-detected lithium ion battery is located between the two bottom plates. The pressure sensors are respectively installed on the opposite side surfaces of the bottom plates and the to-be-detected lithium ion battery, and the output ends of the pressure sensors are connected with a signal processor electrically. According to the above lithium ion battery cycle life detection device, the pressure sensors are arranged on the bottom plates, when the charge and discharge cycle tests are carried out on thelithium ion battery, the lithium ion battery expands in the thickness direction, the pressure sensors can reflect the pressure change caused by the lithium ion battery thickness change to the signalprocessor timely, and by a relation schema of the cycle number of times and the capacity attenuation rate and the pressure change, the cycle life of the lithium ion battery can be assessed. The abovedetection results are more accurate, and the assessment method is simpler and is stronger in adaptability.
Owner:ETRUST POWER ETP GRP LTD
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