2104results about How to "Expand the scope of detection" patented technology

A surface inspection system, as well as related components and methods, are provided. The surface inspection system includes a beam source subsystem, a beam scanning subsystem, a workpiece movement subsystem, an optical collection and detection subsystem, and a processing subsystem. The signal processing subsystem comprises a series of data acquisition nodes, each dedicated to a collection detection module and a plurality of data reduction nodes, made available on a peer to peer basis to each data acquisition nodes. Improved methods for detecting signal in the presence of noise are also provided.

The invention discloses a device and method for the detection of violation of a front vehicle and the early warning of violation of a vehicle on a road, and the device comprise a video reading module which is used for obtaining a video image of a road; a road detection and recognition module which is used for detecting a lane line of the vehicle during running, and recognizing whether the lane line is a solid line or a dotted line; a front vehicle violation detection unit which is used for judging the lane changing condition of the front vehicle, judging whether the vehicle changes the lane illegally or not according to the type of the lane line and the steering lamp information, giving an alarm to a driver when the front vehicle changes the lane illegally, and extracting the license plate information of the front vehicle' and a vehicle violation early warning unit which is used for predicting whether the vehicle changes the lane illegally or not, and giving an alarm to a driver when the vehicle changes the lane illegally. The device is low in cost, facilitates the standardization of the driving habits, facilitates the reduction of traffic accident rate, and is great in social value.

An electronic article surveillance (EAS) tag / device with coplanar and / or multiple coil circuits, a tag / device with two or more memory bits, and methods for making and tuning the resonant frequency of an EAS tag / device. The device generally includes: an outer inductor having one end coupled to a capacitor plate; an inner inductor having one end coupled to an other capacitor plate; a first dielectric film on the outer and inner inductors and the capacitor plates coupled thereto, having openings therein exposing other ends of the outer and inner inductors; a linear capacitor plate and a nonlinear capacitor plate on the first dielectric film; a second dielectric film containing holes therein for the second linear and nonlinear capacitor plates, and exposing the other ends of the first and second inductors; and first and second conducting straps on the second dielectric film, electrically connecting one of the exposed inductor ends to a corresponding second capacitor plate.

An automotive radar which can process signals at high speed to detect a target in a wide angle range is provided. The automotive radar comprises a transmitting antenna which emits an electromagnetic wave, two receiving antennas which receive the electromagnetic wave reflected by a target, an antenna plate on which the transmitting antenna and two receiving antennas are arranged. It also includes a drive which rotates the antenna plate in an azimuth direction, which corresponds to the direction of arrangement of the two receiving antennas, to scan a detection angle formed by the two receiving antennas. The drive has rest time between scans to stop rotation. The automotive radar also includes a signal processor which detects the azimuth angle of the target with respect to a reference direction during the rest time according to received signals from the two receiving antennas and the rotation angle of the antenna plate at rest.

A device for detecting an azimuth has a transmission array antenna having plural transmission antenna elements arrayed along an array axis and a receiving array antenna having plural receiving antenna elements arrayed along the array axis. A reception signal is acquired for each of channels by transmitting and receiving a search wave through each of the channels. The channels are arbitrary combinations of each of the transmission antenna elements and each of the receiving antenna elements. A first spatial frequency analysis is performed along the array axis of either ones of the transmission antenna elements and the receiving antenna elements using the reception signal. A second spatial frequency analysis is then performed along the array axis of the other ones of the antenna elements using results of the first spatial frequency analysis. An azimuth of a target is determined based on analysis results from the second spatial frequency analysis.

A current sensor includes first to fourth magneto-resistive elements each having a resistance value; and a compensation current line applying a compensation magnetic field to the magneto-resistive elements. A bridge circuit is formed by the magneto-resistive elements. Resistance values of the first and third magneto-resistive elements change together in one increasing / decreasing direction. Resistance values of the second and fourth magneto-resistive elements change together in the other increasing / decreasing direction. The compensation current is generated by a potential difference between the first and second junctions in response to application of voltage between the third and fourth junctions. The compensation current line includes first to fourth line portions. Each line portion extends in the same direction as the extending direction of the magneto-resistive elements, overlaps the corresponding magneto-resistive elements, and. The current-to-be-detected is detected based on the compensation current.

An automotive radar which can process signals at high speed to detect a target in a wide angle range is provided. The automotive radar comprises a transmitting antenna which emits an electromagnetic wave, two receiving antennas which receive the electromagnetic wave reflected by a target, an antenna plate on which the transmitting antenna and two receiving antennas are arranged. It also includes a drive which rotates the antenna plate in an azimuth direction, which corresponds to the direction of arrangement of the two receiving antennas, to scan a detection angle formed by the two receiving antennas. The drive has rest time between scans to stop rotation. The automotive radar also includes a signal processor which detects the azimuth angle of the target with respect to a reference direction during the rest time according to received signals from the two receiving antennas and the rotation angle of the antenna plate at rest.

A sensor module (1) for measuring the distance to a target and / or the velocity of the target (50), the sensor module (1) comprising at least one laser source (100), at least one detector (200) being adapted to detect modulated laser light and at least one control element the control element (400) being adapted to vary the focus point of the laser light and / or the intensity of the laser light and / or the direction of the laser light. The control of the laser light emitted by the laser source (100) either by active optical devices as variable focus lenses or controllable attenuators or passive optical elements in combination with arrays of laser sources (100) and detectors (200) enable flexible and robust sensor modules.

The invention discloses a preparation method of an electrochemical three-dimensional microfluidic paper chip with high flux, low cost and simplicity in operation, and an application method of the electrochemical three-dimensional microfluidic paper chip to a field test. According to the invention, hydrophobic wax patterns are printed on three pieces of common filter paper with the A4 size respectively in batches by a full-printing-level adhesion piling mode. The preparation process comprises the following steps: printing the hydrophobic wax patterns in batches; melting wax and forming; screen-printing an array working electrode, a reference electrode and a counter electrode on the filter paper in batches; printing horse radish peroxidase and oxidase on the surface, without the working electrode, of the filter paper sequentially in batches; cutting the electrochemical three-dimensional microfluidic paper chip; preparing a double-sided adhesive tape sheet; adhering the filter sheets through the double-sided adhesive tape sheet; and preparing an electrochemical three-dimensional microfluidic paper chip clip. A method for performing field test on the electrochemical three-dimensional microfluidic paper chip comprises the following steps: clamping the paper chip by using the electrochemical three-dimensional microfluidic paper chip clip; inserting into six copper finger slots; and connecting an electrochemical work station through a multiplexer.

The invention discloses a portable six-rotor-wing aircraft used for bridge detection, and relates to the field of unmanned aerial vehicles. The portable six-rotor-wing aircraft comprises an aircraft body, six foldable aircraft arm assemblies, a looking-up camera tripod head, a two-axis laser tripod head, an ultrasonic obstacle avoiding device and a retractable landing gear, wherein each foldable aircraft arm assembly is composed of a motor, a paddle, a collision preventing structure, an aircraft arm and a foldable structure. In order to achieve the purpose of bridge detection, the looking-up camera tripod head is developed and designed to be used for photographing flaw information of a bridge bottom face and bridge piers; the laser scanning range finder tripod head is designed and used for scanning bridge bottom two-dimensional features and positioning the aircraft in the bridge bottom non-GPS environment; the ultrasonic obstacle avoiding device is designed and used for avoiding obstacles for the aircraft under complex environments; the foldable aircraft arm assemblies can be folded and unfolded conveniently and quickly, so that the problem that a large-size unmanned aerial vehicle is not convenient to carry is effectively solved.

The invention discloses a method for controlling microwave vehicle detecting radar, comprising the following steps: microwave detecting radar work parameter is evaluated; pulse compression in the range direction is carried out; sub-echo of each target vehicle is respectively extracted, and whether advancing vehicle exists is judged, speed search is carried out on data of each sub-echo of advancing vehicle, one matched filtering function is obtained after each search, pulse compression in the azimuth direction is carried out, and then the kurtosis value is calculated; if the largest kurtosis value is obtained, the search speed corresponding to the largest kurtosis value is the traveling speed of the vehicle, frequency modulation slope in the azimuth direction is calculated according to the speed and pulse compression in the azimuth direction is carried out, and then signals of each range gates are added and are compared with the set threshold to obtain vehicle length; if the largest kurtosis value is not obtained, then search is kept on by returning to the previous step. The invention has numerous monitoring lanes, wide detection range and more precise detecting speed, can detect vehicle with low speed or even standing vehicle precisely, and can estimate vehicle length, thereby facilitating traffic control.

A voltage detector that detects an AC voltage in an object includes: an electrode disposed facing the object; a current-to-voltage converter that has a first input set at a reference voltage and a second input connected to the electrode and converts a detection current, which corresponds to a potential difference between the detected AC voltage and the reference voltage on a path including the electrode and a feedback circuit connected to the second input, to a detection signal; an integrating circuit that integrates the detection signal and outputs an integrated signal whose amplitude changes in accordance with the potential difference; an insulating circuit that inputs the detection signal or the integrated signal, and outputs the signal so as to be electrically insulated from the input; and a voltage generating circuit that generates the reference voltage by amplifying a signal based on the integrated signal to reduce the potential difference.

The present invention discloses a preparation method of a simple, low-cost, multi-channel microfluidic chemiluminescent paper chip and an on-site detection method by using the same. By using a full print mode, a plurality of multi-channel microfluidic chemiluminescent paper chips are printed out on a common A4-size filter paper in batch. The printing process includes: printing hydrophobic wax patterns in batch; melting wax for molding; printing chemiluminescent reagent ink patterns in batch; printing oxidase ink pattern in batch; cutting the microfluidic chemiluminescent paper chips into certain shape; and performing plastic package to the prepared microfluidic chemiluminescent paper chips. An on-site detection method by using the microfluidic chemiluminescent paper chip comprises the steps of: placing the plastic packaged microfluidic chemiluminescent paper chip into the cartridge of a handheld luminescent detector; dropwise adding a sample solution into the sample region; then covering the cartridge with a lid, and starting the test. The existence and contents of glucose, polyphenols, xanthine, cholesterol, uric acid, and hemoglobin are sequentially determined via the size of six chemiluminescence peaks sequentially appearing.

The invention discloses a protective system for lithium ion cells. The system comprises a signal acquisition unit and a control unit, wherein the signal acquisition unit comprises a protective chip and a voltage detection unit, and the control unit comprises a singlechip and a switch unit. The voltage detection unit is connected with a lithium iron cell. The protective chip detects the voltage of the lithium ion cell through the voltage detection unit. The singlechip reads a voltage value detected by the protective chip through a communication interface of the protective chip and switches off and on a charging and discharging circuit through a control switch unit according to the set range of the voltage value. The system adopts a form of the protective chip and the singlechip to protect the lithium ion cell, enlarges a detection range through the protection chip, provides flexible protection parameter set through the singlechip, and is a protective system applicable to various lithium ion cells.

The invention discloses an electrochemiluminescence sensor for detecting trace pesticide residue and a method for detecting pesticide residue. An electrode preparation method (figure attached) comprises the following steps: selecting an identifier of the pesticide residue; preparing quantum dots and graphene nano material according to documents; and modifying the nano material, the quantum dots and the identifier onto the electrode surface of the sensor by the electrode surface modification technology. The method for detecting the trace pesticide residue comprises the following steps: connecting the modified electrode to an electrochemiluminescence instrument and detecting the pesticide residue in the sample extract. The electrode in the invention has high specificity and sensitivity capable of reaching ng level, a basic detection process is finished only within 3-5 min, and the cost is low. The method for detecting the pesticide residue by utilizing the electrode is fast and simple to operate, and the reaction is automatically finished and the result is automatically recorded by an apparatus.

The invention discloses a valve stroke testing system which is characterized in that the system comprises a tested valve, a valve rod stroke control mechanism, an air intake and exhaust control device and a detecting unit; the tested valve comprises a pneumatic actuating mechanism and a sensor unit, wherein the pneumatic actuating mechanism controls the air intake or air exhaust through a two-position three-way electromagnetic valve; the sensor unit is used for obtaining the related information of a valve rod; the valve rod stroke control mechanism is provided with a limit sleeve; the valve rod is provided with a limit stop which is used for limiting a part of stroke of the valve rod; the air intake and exhaust control device is communicated with a circumscribed instrument air tank through an air intake electromagnetic valve according to one way of a buffer tank; the other way of the air intake electromagnetic valve is communicated with an air exhaust electromagnetic valve; one way of the air intake electromagnetic valve is communicated with the two-position three-way electromagnetic valve through a manual valve; and the detecting unit is used for collecting detecting signals and providing control signals of the two-position three-way electromagnetic valve, the air exhaust electromagnetic valve and the air intake electromagnetic valve. the valve stroke testing system provided by the invention can be used for online or off-line test of the valve stroke, can be used for full stroke or partial stroke test for the valve, and can be applied to pneumatic-type interlocked valves without mounting intelligent positioning devices in all industries.

A nanocrystalline core antenna for use in electronic article surveillance (EAS) and radio frequency identification (RFID) systems. The nanocrystalline antenna is constructed from nanocrystalline material and exhibits improved detection range in EAS and RFID systems compared to conventional antenna configurations.

The invention provides a laser ultrasonic online nondestructive material-increase manufacturing part detection method and belongs to the field of nondestructive detection. The laser ultrasonic online nondestructive material-increase manufacturing part detection method utilizes the change of laser excited ultrasonic surface wave amplitude to detect metallurgical defects produced during material-increase manufacturing process, a detection device is integrated with a high-energy beam generating device of a material-increase manufacturing device to achieve synchronous part defect detection in the material-increase manufacturing process, non-detection zones brought due to complicated shapes after part manufacturing is completed are avoided, and the reliability of material-increase manufacturing parts is improved. In addition, the detection process and the manufacturing process are combined so that follow-up detection time can be omitted, and the production efficiency of the whole material-increase manufacturing part production process can be improved.

The invention discloses a method for detecting an electrode of a molecular imprinting membrane of EDCs and the EDCs; the preparing method of the molecular imprinting membrane electrode comprises the following steps: a functional monomer is selected; template molecule of the EDCs, the functional monomer, a crosslinker, a porosity-making agent, an initiating agent and organic solvent are mixed evenly according to a certain molar ratio so as to prepare MIPs solution; nanometer material solution is prepared; the nanometer material and molecular imprinting polymer MIPs are modified on the surface of the electrode of a sensor by using the electrode surface modifying technology; a method for detecting trace amount of the EDCs comprises the following steps: the electrode of the molecular imprinting membrane is connected with an electrochemical working station and detects the EDCs in the environment sample extract; the electrode of the molecular imprinting membrane of the invention has strong specificity and high sensitivity which can reach ng level; a basic detection process is completed by only 1 to 2 minutes; the cost is low and the detection of one sample needs only a plurality of cents; the method for detecting the secretion in the environment by the electrode of the molecular imprinting membrane has fast and simple operation and the reaction and result are completed and recorded automatically by instruments.

The invention discloses an SD-RAN (software defined radio access network)-based whole network cooperative caching management system and method. According to the SD-RAN (software defined radio access network)-based whole network cooperative caching management system and method, a content-popularity mapping table and a wait caching / replacement list are generated through detection and content popularity statistics, and a caching decision is made according to the wait caching / replacement list, and is issued to a caching node, so that caching and update can be carried out; a real-time global caching mapping table is obtained through monitoring the caching decision; and the caching node responds to a content request and delivers corresponding content according to the content request of a user of a current cell; characteristics of limitation of content acquisition delay and the change of the popularity of different content with time and places are fully considered, and a global network view in a control layer of a software defined network is fully utilized, and therefore, the detection range of the popularity of content can be expanded; and based on whole network cooperative caching optimized content arrangement, a situation that content is repeatedly called from a remote-end content server can be avoided, and network overhead can be reduced, and user experience can be improved.

The invention discloses a gallium nitride sensor, a preparation method and a multi-sensor system. The sensor comprises a heterostructure semiconductor substrate and a transistor which is located on the heterostructure semiconductor substrate, based on III-group nitrides and of an HEMT structure. Metal of the source electrode and metal of the drain electrode are both arranged on the portion, on the top layer of the transistor, of the semiconductor. A functionalized membrane obtained through functionalized processing is arranged on the surface of the grid electrode, and an induction area is formed in the exposed grid electrode area between the source electrode and the drain electrode. By detecting the current changes of the induction area, the concentration of to-be-detected substances making contact with the induction area is detected. By means of the scheme, the defects that in the prior art, sensitivity is low, the detection range is small and portability is poor can be overcome, and the advantages of being high in sensitivity, large in detection range and good in portability are achieved.

The invention discloses a comprehensive experiment table for performance parameters of a harmonic reducer of a robot, which belongs to the technical field of harmonic reducers and comprises a base, a load application device, a sliding seat, a servo motor and a control unit, wherein the load application device is mounted on the base, an input end of the load application device is connected with a flexible gear of the harmonic reducer, the sliding seat is slidably mounted on the base, slides towards the load application device and is provided with a fixing support for fixing a rigid gear of the harmonic reducer, the servo motor is slidably mounted on the sliding seat and slides towards the fixing support, a power output shaft of the servo motor is connected with a wave generator of the harmonic reducer, and the control unit is used for processing information and recording parameters and is connected with the servo motor and the load application device. The comprehensive experiment table is convenient in operation, is capable of truly and accurately detecting the performance parameters of the harmonic reducer, and is widely applied to detecting the performance of the harmonic reducer.

In a tire state quantity detecting apparatus, a detector that deforms by force exerted from a tire and that outputs a signal corresponding to the quantity of deformation is embedded within the tire. The detector is enclosed in a capsule within the tire, so that the quantity of deformation of the detector is reduced relative to the quantity of deformation of the tire.

The invention relates to a railway locomotive running attitude measuring method comprising the following steps: a high-speed camera is fixedly arranged on at least three non-colinear points of the railway locomotive under measurement by taking surfaces of rails as the measuring datum; along with the running of the railway locomotive under measurement, the high-speed camera shoots the running imagesequence of an counterpart camera arranged on the top surface of the rails; the running image sequence of the counterpart camera is processed and analyzed, and the offset of each point relative to the rails is obtained; the special attitude and the offset of the railway locomotive under measurement relative to the two rails are determined according to the offset of three measuring points, and accordingly the dynamic offset of any point which is fixedly connected with the railway locomotive under measurement is obtained; the dynamic envelop curve of the railway locomotive under measurement isobtained according to the dynamic offset of the key point on the profile of the railway locomotive under measurement; the dynamic envelop curve is compared with the building profile, and the ultralimit early warning and alarming is carried out if a monitoring point is close to or exceeds the building clearance. The invention ensures the railway locomotive running attitude measuring precision whenthe dynamic displacement of the railway locomotive is measured on line in real time.

The invention belongs to the medical detection field, and discloses a method and a system for noninvasive detection of fetus chromosome aneuploid. The disclosed detection method and system also relate to a method and a system for elimination of sequencing GC preference in chromosomes and among chromosomes and a method and a system used for the relation model of the Z values of X and Y chromosomes in a normal male fetus. Through elimination of influences of sequencing GC preference in chromosomes and among chromosomes, the relation model of the Z values of X and Y chromosomes in a normal male fetus is built, and the determination threshold of difference between the theoretical value and the actual value of the Z value of the X chromosome is built. The accurate detection of fetus chromosome aneuploid, especially sex chromosome aneuploid is achieved.

The invention discloses a quantum dot molecular imprinting microsphere quartz fluorescent sensor for detecting multicomponent food additives simultaneously and a method for detecting the food additives by the quantum dot molecular imprinting microsphere quartz fluorescent sensor. A method for preparing a quantum dot molecular imprinting microsphere comb quartz plate comprises the following steps of: selecting functional monomers corresponding to the food additives; preparing quantum dots and preparing quantum dot molecular imprinting microspheres according to the literature; and modifying thesurfaces of different probes of the comb quartz plate with the imprinting microspheres of different food additives by utilizing layer-upon-layer accumulated surface modification technology. The method for detecting the trace multicomponent food additives simultaneously (which is shown as the figure) comprises the following steps of: immersing the modified quartz plate into simply-pulpified food solution, arranging the quartz plate on a sealing quartz vessel, and detecting the food additives in a sample. The quantum dot molecular imprinting microsphere quartz fluorescent sensor has high specificity and sensitivity, short detection time and low cost; and in a method for detecting pesticide residues by fluorescent light, the operation is simple and quick, and reactions and results are completed and recorded automatically by instruments.

The invention discloses a polystyrene fluorescent nanometer particle as well as a preparation method and applications of the polystyrene fluorescent nanometer particle. The particle is the polystyrene fluorescent nanometer particle with a fluorescent material, wherein the fluorescent material is a chelate compound formed by the reaction of rare earth elements, beta-diketone substances and tri-n-octylphosphine oxide. The preparation method of the polystyrene fluorescent nanometer particle comprises the following steps of: (1), synthesizing the polystyrene fluorescent nanometer particle through an emulsion polymerization method, a seed emulsion polymerization method or a non-soap emulsion polymerization method; and (2), adding the polystyrene nanometer particle which is swelled by the organic solvent to the organic solvent dissolved with the fluorescent substances, wherein the organic solvent is removed after the fluorescent substances are diffused to the inner part of the polystyrene nanometer particle. The fluorescent nanometer particle has good mono-dispersion and suspension stability and is very suitable for being applied to immune-chromatographic assay.

The invention discloses a pulsed eddy current and electromagnetic ultrasonic composite based nondestructive body defect detecting method. Firstly, a permanent magnet is put on a round coil, an electromagnetic ultrasonic / pulsed eddy current composite probe is manufactured, a pulsed eddy current device is used for performing pulsed excitation on the probe, detecting signals are separated through a duplexer, filtered by a filter, acquired by a data acquisition system and analyzed, a separation and extraction algorithm is performed on mixed detecting signals in combination of developed strategies based on spectral analysis, filtering and the like, and composite signals are separated and extracted, so that eddy current detecting signals and ultrasonic detecting signals are extracted respectively from the mixed detecting signals and are used for detecting different types of defect information in different positions. The method for simultaneously separating and extracting the composite detecting signals has the advantages of high detection efficiency, wide detection range, compatibility for detection of both surface defects and deep defects, wider thickness detecting range and the like, and has a wider application prospect.