434results about How to "Strong anti-interference ability" patented technology

The invention discloses a method for detecting arc faults based on the time-frequency characteristics of high-frequency current component. The method comprises the following steps: measuring the transient high-frequency current in a primary loop by using a self-integrating Rogowski coil and performing the spectrum analysis of the high-frequency current; measuring the time difference between the zero-crossing time of a power-frequency current and the time that the signal of the transient high-frequency current appears by adopting a counting method via using an interrupt trigger and a timer/counter, so as to confirm the phase angle position where the high-frequency current occurs in the protected loop load current; and judging whether an arc fault is caused or not according to the spectrum characteristics of the high-frequency current, the phase angle position where the high-frequency current signal occurs and regularity of the signal of the high-frequency current. The invention is capable of detecting arc faults in the normal power supply, is limited by installation position slightly, can distinguish the transient current generated by normally connecting/disconnecting a circuit from the power electronic-load current of the switch power supply and the like, and reduces and avoids misoperation.

The invention provides a UUV (Unmanned Underwater Vehicle) path tracking method based on self-adaption sliding-mode control. The method comprises the steps of 1, initializing; 2, obtaining a current state of a UUV; 3, establishing an underactuated UUV horizontal error equation to obtain the positional deviation xe, ye and a course deviation value psi e; 4, utilizing a sliding-mode control method to respectively design a speed sliding-mode control law, a position sliding-mode control law and a stem phase angle sliding-mode control law and enabling th ud to be zero, the xe to be zero and the psi e to be zero by controlling thrust Xprop, expected speed (shown in the following image) and torque Nprop; 5, updating a self-adaption law of handover gain and a self-adaption law of boundary layer thickness; 6, performing control input saturation compensation; 7, enabling k = k +1, returning to the step 2 and updating the control laws and the self-adaption laws for the next time to achieve the accurate control on the UUV horizontal path tracking. The UUV path tracking method can only depend on a controller which is designed according to a horizontal dynamical model to stabilize the system and is suitable for various underactuated UUVs.

The invention is a ice thickness sensor and the measuring method belonging to automatic detecting technology field, the positive electrode of the detecting power in the sensor forms a detecting loop together with the each metal detecting contactor arranged according to the scale, inner scale decoding switch circuit, conduction identification circuit and the negative electrode of the power through the measured media including water, ice, air between the inner and outer walls of the sensor, the inner microchip control circuit in the sensor generates decoding switch control signal according to a fixed coding order, the sensor is connected whose detection circuit correspondent to the metal measuring contactor to carry on the ice thickness measurement, the sensor can carry on fixed point continuous automatic detection to the ice thickness in river, reservoir, long distance transmission project, environment detection and so on.

The invention provides a method for estimating and correcting the position of a permanent-magnetic synchronous generator rotor. The method comprises the following steps that: by taking zero crossing points of the pole-tip phase/line voltage of a motor as boundaries, a 360-degree electrical angle of a motor rotor is divided into twelve electrical-angle intervals; by taking the relative relation between the phase/line voltage of three phase and zero as a general judgment method of a current angle interval and taking a special judgment process of the current electrical-angle interval provided as a basis, the current electrical-angle interval is judged; according to the electrical rotational speed of the generator rotor, an electrical-angle increment of the motor rotor is obtained through calculation; the sum of the increments of an angle corresponding to an initial point and the electrical angle relative to the initial point in each electrical-angle interval is a position signal of the motor rotor; by taking the quantity of the position signal as the quantity of a basic position signal, the deviation quantity of the position information of the motor rotor is estimated through specific control algorithm; and by taking the deviation quantity as the feedback quantity of a position-correcting link, the quantity of the basic position signal is compensated with an output result through the regulation of a regulator, so that an accurate position signal of the motor rotor can be obtained.

The invention provides a method for identifying surface electromyography (sEMG) on the basis of empirical mode decomposition (EMD) sample entropy. The method comprises the following steps: acquiring the corresponding sEMG from the related muscle tissue; performing EMD by using an actuating signal of the sEMG determined by energy threshold; adaptively selecting a plurality of intrinsic mode function (IMF) components comprising electromyographic signal effective information according to a frequency availability method; superposing the IMF components to serve as effective electromyographic signals and evaluating the sample entropy; and inputting the sample entropy serving as feature vector into a clustering classifier based on a spindle kernel clustering algorithm to realize identification on an upper limb multi-locomotion mode of the electromyographic signal. The sample entropy can disclose the complexity of the sEMG from a short time sequence, represents the tiny change condition of the electromyographic signal well, has high antijamming capability, simple algorithm and high calculation speed, and is particularly suitable for real-time processing of the electromyographic signal.

The invention discloses a UWB-based indoor mobile robot positioning and navigation system, including a device layer, an intermediate layer and an application layer; the device layer completes the construction of a system hardware platform, including a base station, a label, a mobile robot and a Wifi communication module, Among them, the base station and the tag realize the positioning function, and the Wifi module and the communication base station in the base station are used to connect the device layer and the middle layer to realize the upload and release of information; the middle layer includes a database, data analysis software and a server to complete data storage and forwarding, analysis and processing and remote access control functions; the application layer mainly provides a friendly remote client software interface to realize online update of mobile robot status information, completion of mobile robot path planning and generation of other related reports. The invention uses UWB technology to realize the positioning and navigation of the indoor mobile robot, and has the advantages of strong anti-interference ability and low power consumption. For other positioning technologies, using UWB signals for indoor positioning can obtain higher positioning accuracy and stability.

A method and a current operational module for on-line measurement of battery internal resistance and an on-line measurement instrument for battery internal resistance have high measurement accuracy and strong anti-interference ability. The on-line measurement instrument for battery internal resistance comprises a current work module, a voltage measurement module, an analog to digital conversion module, a signal generation module, a centre processing module, an Input/Output module, and a power supply module used for on-line measurement of battery internal resistance.

The invention is concerned with computer protecting monitor device, belonging to power system auto-control process field and it is fit to form the intelligent terminal device of integration automatic system with 35 KV and less. It relates to CPU, cabinet, plug-in board and operation system. The plug-in board relates to power supply, main board, simulation/ transformer board, relay board, keyboard/ display. The said operation system is embedded task module. The task module relates to protect unit, test unit, control unit, monitor unit, communication unit, fault recorder unit and accident recorder unit. This equipment of invention can be adjusted easily with high intelligent integration and it is fit for installing on switchboard or grouping screen together. Each part fixes alone to disperse heat with strong anti-jamming ability to be replaced.

The invention discloses an optical fiber acceleration transducer comprising an optical fiber and an elastic membrane. The end surface of the optical fiber and the elastic membrane are arranged in parallel to form an Fabry-Perot cavity; a mass block is arranged on the elastic membrane for generating inertia force under the action of the acceleration of an object to be measured, and the inertia force acts on the elastic membrane so that the length of the Fabry-Perot cavity varies with the acceleration of the object to be measured, and a varied interference spectrum is transferred by the opticalfiber. The optical fiber acceleration transducer has minor size, strong capacity of resisting disturbance, wide response bandwidth, high sensitivity and low cost and can be widely applied to acceleration measurement.

The invention provides a system for monitoring the contact temperature of a high-voltage switch cabinet on line. The system comprises a repeater, a converter and a local workstation, which are connected in sequence, wherein, the repeater is connected with a plurality of slave monitoring units respectively; and the RS-485 standard is applied to the repeater and the converter respectively. The monitoring system of the invention can monitor the temperature rise value of the contact in the high-voltage switch cabinet on a real-time basis under the conditions of high voltage, high temperature and high magnetic field intensity; by detecting the contact temperature of the high-voltage switch cabinet, the temperature rise value obtained through the comparison between the temperatures of an isolated contact and the high-voltage switch cabinet body can be comprehended on a real-time basis, and a real-time alarm can be triggered, thereby avoiding the power failure caused by the isolated contact which is subjected to excessively high temperature rise or even burnt; and meanwhile, the system of the invention can carry out the following operations on data from each sink node: collection, storage, query and report output.

The invention relates to a photoelectric testing method for the detonating speed of a detonating fuse and a device thereof. The device is characterized in that the device at least comprises two multimode fibre probes inserted into the detonating fuse in certain distance, a fibre coupling connector, a PIN integrated photoelectric detector, a power supply, an FPGA high-speed data acquisition module and a liquid crystal display screen; the PIN integrated photoelectric detector is used to carry out time sharing processing on the temporal fore-and-aft relation of optical signals acquired by the probes in time; optical signals of a plurality of probes are converted into pulse electric signals and are transported to the FPGA high-speed data acquisition module; the input pulse electric signals are subjected to sampling, calculation processing, control and caching; the distance of each two probes of the plurality of the probes and the measured time are subjected to calculation processing to seek an average speed; the detonating speed and relevant data of the detonating fuse are transmitted to the liquid crystal display screen and are displayed; and the photoelectric testing method has the advantages of high testing precision, strong antijamming capacity, small volume, simple operation and the like.

The invention discloses a geometry target positioning method based on multi-layer depth and color visual information. The method comprises the following steps: correcting internal parameters and distortion coefficients of a color camera and a depth camera, and determining a conversion matrix relationship between the images of the two cameras of the depth camera and the color camera; acquiring color and depth image information of the target object; preprocessing the color image in an HSV color space according to the intuitive image characteristics of the color, and segmenting a binary image ofthe target object; eliminating the background of the depth image through background subtraction, carrying out the multi-level threshold binarization operation, and segmenting an object through the multi-level depth image); carrying out edge contour detection based on the multi-level binary image, and identifying a target geometry through parameter screening; and calculating a central coordinate and a rotation angle of the target geometry through the Hu invariant moment and converting the central coordinate and the rotation angle into a world coordinate system of the visual system. According tothe invention, the identification effect on the texture-free geometry is good, and the anti-interference capability for different light environments is strong; the principle of object recognition issimple, the calculated amount is small, and the requirement for real-time recognition can be met.

The invention relates to a bus communication based small unmanned aerial vehicle control system. The bus communication based small unmanned aerial vehicle control system comprises data transfer radios, bus sensors, flight control computers, a power supply system, steering engines, a task device and a data recorder, wherein the data transfer radios use a CAN (controller area network) bus network as a communication foundation and conform to a unified communication protocol, and the data transfer radios, the bus sensors, the flight control computers, the power supply system, the steering engines, the task device and the data recorder are connected to interfaces of the CAN bus network respectively and are in both-way communication with the same. The system has the advantages of good instantaneity, high stability, high rate, easiness in contact expansion and low cost.

The invention discloses a digital-circuit-based true random number generator, relates to the technical fields of integrated circuits and the field of information safety, and aims to solve the problems of the conventional full-analogue or digital-analogue mixed circuit. Technical key points are that: the digital-circuit-based true random number generator comprises an auxiliary oscillation sampling circuit group, a main oscillation sampling circuit group and a post-processing circuit, wherein the auxiliary oscillation sampling circuit group comprises at least one basic oscillation sampling circuit; the main oscillation sampling circuit group comprises at least one basic oscillation sampling circuit; the output end of the basic oscillation sampling circuit in the auxiliary oscillation sampling circuit group is connected with the frequency control end of the basic oscillation sampling circuit in the main oscillation sampling circuit group; and the output end of the basic oscillation sampling circuit in the main oscillation sampling circuit group is connected with the input end of the post-processing circuit.

The invention discloses an information processing device and method. The information processing device comprises a first light source part used for emitting a first light ray, a first light conversion part arranged between the first light source part and a projection surface and used for enabling the first light ray to form a second light ray after passing through the first light conversion part, an image acquisition part and a processing part, wherein the second light ray can form a first invisible image with preset patterns on the projection surface; the image acquisition part is provided with an acquisition region, the projection surface is positioned in the acquisition region, when a target object enters the acquisition region, the image acquisition part is used for acquiring a second invisible image of the second light ray, formed on the target object; and the processing part is connected with the image acquisition part and used for processing the second image to obtain a space position parameter of the target object relative to the information processing device.

The invention relates to a peripheral blood circulation tumor cell detection chip and a system thereof. The detection chip comprises a substrate, and the substrate is provided with an interdigital capacitance circuit and a spiral inductor metal circuit connected with the interdigital capacitor circuit; the interdigital capacitor circuit tightly laminated with a single layer graphene film; the graphene film is laminated with a micro-fluidic control channel; the micro-fluidic control channel and the single layer graphene film form an integrated graphene micro-fluidic pipe screening microchip for screening tumor cells; the single layer graphene film, the interdigital capacitor circuit and the spiral inductor circuit form a whole RCL resonance network; the spiral inductor circuit is also used as a cross coupling antenna. The detection system comprises a detection signal reading and analysis device, and the peripheral blood circulation tumor cell detection chip. The chip and the system can realize the fast, sensitive, accurate and cheap detection of tumor cells.

The invention relates to a continuous-pipe intelligent electric drilling system. The drilling system comprises a ground control system, a continuous pipe and a lower drilling tool, wherein the continuous pipe is internally provided with a photoelectric composite cable, the photoelectric composite cable is internally provided with a three-phase power cable, a power cable, a signal cable and an optical cable, the ground control system comprises an injection head, a ground photoelectric converter, a PLC (programmable logic controller) control module, a roller, a rectification inverter, a boosting transformer and a ground information processing module, and the lower drilling tool comprises a connector, a cable head short section, a non-rotating connector, a telemetry short section, a power-driven power-off and circulating short section, a drilling parameters measuring short section, a well deviation measuring short section, an electric motor, an electric guide short section, a near bit measuring short section and a drill bit. For the drilling system, an electricity and information channel between the ground and the underground is established by injecting the photoelectric composite cable in the continuous pipe, thus overcoming the defects of the continuous pipe made of the composite material, and the drilling electrification and intelligentization of the continuous pipe are realized by matching with the existing continuous pipe and the equipment.

The invention provides a transformer winding deformation degree and fault diagnosis method based on the frequency response analysis method. First, the waveform of a power distribution device connected with a high-voltage casing is measured by an oscilloscope, the oscilloscope is connected in parallel between the end of the high-voltage casing and a knife switch to obtain the waveform of external electromagnetic interference signals, and short-circuit grounding is carried at a secondary side and at a third side respectively. The frequency response analysis method is a sensitive method for analyzing the deformation degree of a transformer winding. According to the frequency response analysis method, whether a winding deforms is judged by comparing response curves. The frequency response analysis method has strong anti-jamming capability, so that the test result has good repeatability and is more in line with the requirement of state overhaul. Transformer lead dismantling is needed in current field test. Therefore, the invention provides a test method for testing a transformer winding without dismantling a lead through interference signal filtering, and the efficiency of on-site transformer winding deformation degree detection is improved.

The invention relates to an interactive lamplight intelligent control system. The system comprises a lamp effect controller, a sensor node controller and sensor nodes corresponding to all lamps, wherein the sensor nodes and the lamps form arrays to be evenly distributed and arranged on a ceiling. The lamp effect controller comprises a microprocessor a, an on-scene communication bus interface module a, an RS485 bus interface module, a memory card module and a touch display module; the sensor node controller comprises a microprocessor module b, an on-scene communication bus interface module b and a power supply conversion module b; each sensor node comprises a human body detection sensor module, a microcontroller module, an on-scene communication bus interface module c and a power supply conversion module c. Due to the fact that each sensor node contains a human body detection sensor, human body locating and movement detection can be effectively completed, and interaction between a person and the lamplight arrays is achieved. According to the interactive lamplight intelligent control system, a large-scale integrated circuit is adopted, and therefore the interactive lamplight intelligent control system has the advantages of being small in size, high in response speed, novel in design, low in power consumption, wide in adapting range and convenient to popularize and use.

The invention provides a WLAN indoor tracking method based on a particle filtering algorithm, and relates to a WLAN indoor tracking method, and solving the problem that the tracking precision is reduced caused by the nolinear model when tracking a dynamic object in the indoor environment. The method comprises the following steps of: building signal intensity probability distribution of an off-line stage with the signal intensity value of a reference point, defining the reference point which has the shortest Euclidean distance with a particle point, taking the reference point as a particle point correcting valve to obtain each particle point and weight values corresponding thereto, and obtaining the estimated value of the position of the user after updating the weight value with a resample arithmetic. The method is suitable for the WLAN indoor tracking.

Disclosed is a magnetic positioning based online monitoring method of achieving of landslide deep layer displacement measurement. One permanent magnet and two or more magnetic detectors constitute a local node monitoring system, and a plurality of nodes are distributed on a landslide body to form an overall landslide monitoring network; in the local node monitoring system, the permanent magnet is fixed to a landslide body stabilizing layer, the magnetic detectors are placed on a landslide layer of the landslide body, after magnetic signals detected by the magnetic detectors are sent back to a monitoring center, the space positions of the magnetic detectors are worked out through a magnetic positioning algorithm, when a landslide happens, the space orientations and space positions of the magnetic detectors will change, the space positions of the magnetic detectors are determined through the same algorithm after the landslide happens, landslide deep layer displacements of the local nodes can be worked out through coordinate transformation, and landslide deep layer displacement data obtained through the monitoring network composed of the local monitoring nodes can be synthesized to assess landslide body deep layer landslide situations.

The invention discloses an orthogonal double grating based synchronous phase shifting common-path interference microscopy detection device and a detection method, and belongs to the technical field of optical interfering detection. The invention solves problems of complexity in processing process of detection data and low measurement accuracy in existing synchronous phase shifting interference microscopy detection methods. The method integrates the interfering microscopy technology with the orthogonal double grating common-path synchronous phase shifting technology, linear polarization parallel light after collimation and beam expansion is divided into object light and reference light by a first polarized beam splitter prism and a second polarized beam splitter prism to be ultimately converged at a rectangular window side-by-side, a computer obtains an interference figure containing four patterns by collection, and phase distribution of an object to be detected is obtained by calculating according to strength distribution of the four interference patterns. The orthogonal double grating based synchronous phase shifting common-path interference microscopy detection device and the detection method are suitable for measurement of three-dimensional shape and phase distribution of micro-objects.

The embodiment of the invention provides a handwriting input method, a handwriting input device, a handwriting input system and a receiver. The method comprises the following steps of: calculating the X axis position information of a light spot acquired by using at least one optical positioning sensor and the Y axis position information of the light spot acquired by the at least one optical positioning sensor to obtain the coordinate information of the light spot, wherein the optical positioning sensor comprises a complementary metal oxide semiconductor (CMOS) optical positioning sensor; acquiring the planar track data of the light spot according to the coordinate information; and transmitting the planar track data to the receiver, so that a control host computer acquires corresponding handwritten information or wipes the handwritten information according to the planar track data received by the receiver. Due to the adoption of the method, the device, the receiver and the system, inputting of the handwritten information and wiping of corresponding information by a user can be realized simply, conveniently and correctly and the cost is saved.

The invention relates to a method for simultaneously determining residual quantities of sixteen sensitized aldehyde and ketone perfumes in a toy, and firstly discloses a method for simultaneously determining the residual quantities of the sixteen sensitized aldehyde and ketone perfumes consisting of 5-methyl-2,3-hexanedione, trans-2-heptenal, trans-2-hexenaldimethylacetal, citral, cinnaldehyde, hydroxycitronellal, benzalacetone, 2,4-dihydroxy-3-methylbenzaldehyde, alpha-isomethylionone, lilial, 6,10-dimethyl-3,5,9-undecatrien-2-one, 4-(4-methoxyphenyl)-3-butylene-2-one, alpha-amyl cinnamic aldehyde, lyral, 1-(4-methoxyphenyl)-1-pentene-3-one, and hexylcinnamaldehyde in the toy to fill the technological blank. The method which allows cloth toys, paster toys, and plastic toys (the ABS material, the PVC material and the PS material) to be detected has the advantages of wide coverage and strong applicability. The method which adopts the ion trap-mass spectrum in a qualitative and quantitative secondary mass spectrum MS/MS mode has a good qualitative and quantitative capability to complex matrix toy samples.

The invention discloses a moving object detection method based on a space-time frequency spectrum combined analysis. For a video sequence, the method mainly comprises a step of a spatial spectrum analysis between single-frame image pixels and a step of a time spectrum analysis of a time sequence formed by pixel points corresponding to continuous multi-frame images. With the spatial spectrum analysis of the single-frame static image, mutation of information between image pixels can be detected, thereby obtaining a candidate image zone maybe containing a moving object; and the candidate image zone is used as the candidate zone of the moving object. The time spectrum of the time sequence formed by pixel points corresponding to continuous multi-frame images is analyzed in the candidate zone obtained preliminarily. With the analysis, time mutation of the same pixel point can be detected and the moving object contained by the candidate zone can be detected. And then detection on the moving object of the scene is realized. The method can be applied to motion detection of a moving object in a complex scene stably and reliably; and the operation efficiency is high.

The invention belongs to the technical field of vehicle detection, and provides a method and device for detecting a vehicle based on a state machine. The method comprises the steps of acquiring original terrestrial magnetic signals, filtering a sliding window, updating terrestrial magnetic signals of a current background environment, carrying out binarization processing, outputting the state machine, and outputting a vehicle detection event sequence. According to the technical scheme, the terrestrial magnetic signals of the background environment can be updated automatically, the drifting phenomenon that a terrestrial magnetic field is changed along with the environment is eliminated, and due to the adoption of the state machine detection method, vehicle detection accuracy can be effectively improved.

The car acceleration supervision and guard against theft and alarm system includes the sensor of the wheel state within the wheel, the sound-light annunciator within the bodywork. The sensor of the wheel state within the wheel comprises of the acceleration sensor, the first microprocessor which is linked with the fan-out of acceleration sensor and the first module of radio frequency launch which is linked with the input of the first microprocessor. The vehicle guard against theft and alarm system comprises of the second microprocessor, the second module of radio frequency launch which is linked with the input of the second microprocessor, the module of orientation and communication of the vehicle, the holding terminal. The sensor of the wheel state and the system of guard against theft and alarm of vehicle forming the system can check the non-normal movement of the vehicle by wireless dispatcher. The combination of the system of guard against theft and alarm of the vehicle and the module of orientation and communication of the vehicle can form the system that can supervise the non-normal movement of the vehicle. The alarming modes have the wireless warning, vehicle orientation tracing and long-distance control in addition to the traditional sound-light warning, which insure the alarming valid in time.

The invention discloses a helicopter guiding system based on wireless ultraviolet light and multi-dimensional codes. The helicopter guiding system comprises four emitting ends and four corresponding receiving ends based on the wireless ultraviolet light and the multi-dimensional codes, and all the emitting ends and the receiving ends communicate correspondingly through atmosphere channels. The invention further discloses a helicopter guiding method based on the wireless ultraviolet light and the multi-dimensional codes. According to the helicopter guiding device and method, the ultraviolet light is used for positioning and guiding in the landing process of a helicopter, the ground gradient, wind speed, the wind direction, ground constitution, barriers and other environment information are sent to a helicopterist through the portable emitting ends to help the helicopter to land smoothly, the limitation that landing conditions are judged only by the helicopterist in the air through the eyes is broken through, a guarantee is added for safe landing of the helicopter, and the helicopterist is helped to safely and accurately land the helicopter under complex environment conditions.

The invention relates to a fiber bragg grating temperature sensor based GIS (Geographic Information System) equipment contact terminal temperature online monitoring system. The fiber bragg grating temperature sensor based GIS equipment contact terminal temperature monitoring system comprises a fiber bragg grating temperature sensor, a fiber bragg grating interrogator and a computer. The high accuracy fiber bragg grating temperature sensor respectively measures the GIS outer casing temperature, the contact terminal temperature and the environmental temperature; the interrogator receives and demodulates wave length signals reflected by the temperature sensor; the computer which is used for displaying temperature signals obtained by the interrogator can monitor the temperature change in real time. The fiber bragg grating temperature sensor based GIS equipment contact terminal temperature monitoring system has the advantages of being high in accuracy due to the facts that an appropriate algorithm is adopted and the contact terminal temperature is indirectly obtained through the outer casing temperature and the environmental temperature; enabling the GIS equipment to be reliably operated due to the fact that the fiber bragg grating temperature sensing technology is applied to the GIS equipment contact terminal temperature online monitoring; being strong in disturbance resisting capability and good in insulating performance, allowing fixed-point measurement, achieving real-time online measurement of the temperature and having wide application prospects.

The invention provides a rail comprehensive inspection method based on an air-rail double-purpose unmanned aerial vehicle. Two modes where the unmanned aerial vehicle flies in air and moves along a steel rail are adopted, the flight mode is adopted when quick detection is required for rail fastener missing and the like, the steel rail operating mode is adopted when high-precision detection is required for steel rail and tier surface defects, the two working modes may be arranged and allocated flexibly and switched at any time according to field requirements, and the significant problems of traditional surface inspection mode, such as high cost, poor sensitivity and occupation of normal driving space and other problems, are broken through and solved.