208results about How to "No misjudgment" patented technology

The invention discloses a substation inspection robot-based circuit breaker state template-matching identification method, wherein a substation inspection robot is used for automatically acquiring an image of a circuit breaker, and a template matching method is used for identifying the state of the circuit breaker. The method comprises the following specific steps: respectively extracting areas where characters of open and close are positioned as templates by using the template matching method, and carrying out matching on follow-up shot images; carrying out image segmentation on the open template, the close template and matched windows by using maximum between-cluster variance method (OTSU method) to obtain binary images which contain targets and backgrounds; and comprehensively judging the final state of the circuit breaker based on the difference degree between the templates and the targets of the matched windows. Proved by experiments, the method disclosed by the invention has the advantages of fast processing speed, high reliability, no misjudgment on given open-close conclusion and capability of satisfying with the requirements of real time and high reliability for field inspection.

The invention discloses an island detecting method based on positive feedback of voltage harmonic distortion in the technical field of a distributed power generating system. In the invention, based on the grid connection control principle of the distributed power generating system, a voltage harmonic distortion positive feedback circuit is additionally arranged, the curve of the voltage harmonic distortion H of a microgrid and the area S surrounded by time shafts are calculated by utilizing a sliding data window, and whether an island is caused is judged according to the magnitude of the areaS. The island detecting method has a simple principle, has no effect on damaging the power quality, can be used for detecting the island quickly and effectively in the worst condition defined in the IEEE Std.1547, is applicable to various types of open circuit conditions, is not interfered by pseudo islands, and has good engineering practicality.

The invention discloses an automatic defrosting control method for a frost free refrigerator. The method comprises a step of: intelligently judging a defrosting pointcut, namely testing evaporation temperature, refrigerating chamber temperature, environment temperature and real-time running state of the refrigerator, judging the attenuation degree of the heat exchange capacity of an evaporator ofthe refrigerator according to a set algorithm of the control method, and further judging the defrosting pointcut to automatically control the defrosting process. By the method, defrosting cut accuracy and exit timeliness are realized, the energy efficiency level and refreshing quality of the refrigerator are improved, and the intelligent control level of the refrigerator is improved.

The invention discloses an anti-overflow device for an electric cooking utensil. The anti-overflow device comprises a distance detection module and a controller; the distance detection module is disposed in an upper over of the electric cooking utensil and is used for detecting a distance between the lower surface of the upper cover and a level of food materials cooked in an inner pot of the electric cooking utensil; the controller is connected with the distance detection module and is used for controlling the electric cooking utensil to stop heating or reduce power of heating so as to prevent overflowing of the electric cooking utensil, when the distance between the lower surface of the upper cover and the level of food materials cooked in the inner pot is less than or equal to a preset distance. The anti-overflow device is capable of accurately detection an event wherein thin gruel is about to overflow from the electric cooking utensil during cooking, thereby avoiding causing cleaning and maintenance problems. The invention further discloses the electric cooking utensil and an anti-overflow control method for the electric cooking utensil.

The present invention discloses a sampling system anti-collision device and an anti-collision method. The sampling system comprises a moving mechanism, a motor and so on. The anti-collision device comprises a code wheel, an optical coupling, a position signal detecting unit, a drive pulse counting unit and a drive pulse delivery unit. Wherein, the code wheel or the optical coupling is connected with the moving mechanism. The code wheel is provided with uniformly-spaced transparent slits. The optical coupling detects the transparent slit on the code wheel while moving relatively and outputs a detecting signal with periodical level variation. In addition, the position signal detecting unit determines whether a position signal is output to the drive pulse counting unit. The drive pulse counting unit judges whether the sampling system undergoes collision according to the position signal. Moreover, the present invention discloses a sampling system comprising the anti-collision device. The present invention can effectively detect collision state of the sampling system, make immediate response, stop sampling system operation, ensure personal safety and prevent instrument damages.

The invention relates to a coordination linkage method of an intelligent transformer substation assisting production system, which is characterized by comprising the following steps of: 1, establishing a mapping relation; 2, capturing and analyzing a GOOSE message; 3, finding a sensor related to a GOOSE event according to the mapping relation, coordinating and sensing by a plurality of sensors, re-checking an image, and determining the event; 4, calling a control function related to the event to realize that the coordination linkage is completed by switching a video channel and starting or shutting terminal equipment; and 5, sending an event processing report to a remote centralized control station through a network by adopting an IEC61850 protocol, and receiving a manual intervene command to an operator in charge of the remote centralized control station. The method ensures that all auxiliary production devices of a transformer substation can realize automatic coordination linkage, reduces manual intervene, and ensures no erroneous judgment and false tripping by adopting a multi-sensor coordination sensing and intelligent image recognition technology, thereby achieving the purpose of realizing intelligent operation management on the transformer substation assisting production system.

The invention discloses a photovoltaic grid-connected inverter MPPT (Maximum Power Point Tracking) system based on the admittance optimization algorithm. In the invention, the advantages of the conductance increment algorithm and the fuzzy control algorithm are combined, the admittance optimization algorithm is independently researched and developed, and the fuzzified transfer function and the defuzzification judgment are established. A photovoltaic array Pmax is calculated through a photovoltaic array P-U curve, the voltage level fluctuation can be fast followed, no complex algorithm is required, the maximum power of a solar battery can be fast tracked, and the requirement for MPPT control on the photovoltaic system in various occasions can be well satisfied. Test results verify that the algorithm has better effects such as compatibility with different systems, fastness and the like in comparison with the conductance increment algorithm. The results of a great deal of experiments and test show that the photovoltaic grid-connected inverter MPPT system based on the admittance optimization algorithm has excellent real-time performance and dynamic performance, and is stable in tracking without misjudgment, with tracking accuracy reaching up to 99%.

The invention relates to a single-phase permanent fault recognition method for an extra-high voltage AC transmission line using S transform energy. The method comprises the following steps: after fault occurs to an AC line, selecting a disperse voltage signal of which the recovery voltage sampling sequence length is 1,800 after the fault, and performing S transform to obtain a 901*1,800 time frequency complex matrix; and operating modulus of each element in the complex matrix to obtain the energy value under each frequency point. As too many frequency ranges are not good for recognition, every 9 rows from the 2nd row to the 901st row to obtain a 101*1 matrix, the 901 frequency ranges are integrated into 100 frequency ranges, and the frequency of each frequency range is 50 Hz. The single-phase permanent fault is judged according to the size of the first frequency range, namely the 50 Hz frequency range. A large number of simulation results indicate that the effect of the method is good.

The invention relates to an inspection method and corresponding inspection device for the oil channel sealing of an engine cylinder, belonging to the engine inspection technical field, which comprises an expanding core sealing shaft and a connecting nozzle, wherein, a mandrel with an inner hole is arranged within the expanding core shaft, a group of elastic expanding rings are arranged on periphery of the mandrel, and both ends of the expanding rings are pressed tightly via a spacer sleeve and a retainer ring; the inspection method is as follow: firstly, inserting the prefabricated expanding core shaft of the device into the spindle hole of cylinder and the camshaft hole separately; then pouring the high pressure oil or water or air into the inner hole of the expanding core shaft to make the expanding rings expand outwards to seal the oil hole and other outlets of the oil channel; and finally pouring the high pressure oil or water or air into the inner cavity of the oil channel to inspect the leakage phenomenon of the oil channel and determine the sealing performance. The invention has the advantages of convenient operation, reliable inspection, and ability of improving obviously inspection efficiency and effect and guaranteeing the product performance.

The invention relates to a touch sensing device and a touch sensing method. The touch sensing device comprises a plurality of capacitor type touch sensors and a rear end processing circuit, wherein each capacitor type touch sensor is provided with a touch sensing capacitor, and each capacitor type touch sensor decides the magnitudes of output currents according to the distance between two electrodes of the touch sensing capacitors; the rear end processing circuit is used for respectively carrying out integral operations on the output currents so as to obtain a plurality of voltage values; therear end processing circuit is also used for judging whether a touch situation happens or not according to the voltage difference of two voltage values corresponding to two capacitor type touch sensors so as to further decide whether to calculate the coordinates of the touch position or not; and the change of each voltage value has a linear relation with the change of the distance between two electrodes of a corresponding touch sensing capacitor.

The invention belongs to the field of bridge structure operation safety monitoring and detection, and particularly relates to a bridge cluster structure operation safety intelligent monitoring and rapid detection complete technology which mainly comprises the following four contents: 1, a bridge cluster monitoring system building technology based on high-measuring-point density sensing equipment;2, a bridge structure damage diagnosis method based on temperature-damage stripping; 3, a bridge structure safety rapid detection technology based on a deflection influence surface; and 4, a bridge cluster structure damage diagnosis method based on the deflection influence surface, wherein the first two contents belong to a bridge intelligent monitoring technology and are applied to operation safety diagnosis of a bridge structure with a monitoring system in a cluster; and the last two contents belong to a bridge rapid detection technology and are applied to safety diagnosis of a bridge structure without a monitoring system in a cluster. According to the bridge cluster structure operation safety intelligent monitoring and rapid detection complete technology, bridge structure operation safety monitoring and rapid detection technologies are combined, and the provided complete technology is suitable for operation safety diagnosis of all bridge structures in a bridge cluster.

The invention discloses an electricity utilization information acquiring system. A fault is automatically detected through a terminal, a fault code is formed, a two-dimension code is formed, and the two-dimension code is transmitted to a cloud server, so that a main station can directly search the reason for fault formation of the terminal and a solving strategy; and a right field service worker is dispatched to maintain, so that labor waste is avoided.

A high-sensitivity multi-target detection chromatographic test paper strip is provided and used for detecting targets in a sample. A liner (1) is adopted as a substrate of the chromatographic test paper strip. A sample pad (2), a conjugate pad (3), a chromatographic strip (4) and an absorption pad (5) are disposed on the substrate in order from left to right. Metal nanometer particles (6) are fixed on the conjugate pad (3). The chromatographic strip (4) is provided with a detection line (7) and a quality control line (8). An edge of the sample pad (2) overlaps an edge of the conjugate pad (3). An edge of the conjugate pad (3) overlaps an edge of the chromatographic strip (4). An edge of the chromatographic strip (4) overlaps an edge of the absorption pad (5). The chromatographic test paper strip is used for measuring lateral flow, and achieves multi-target detection by utilizing a Raman spectrometer. The test paper strip can perform high-sensitivity and high-specificity multi-target detection and the detection cost is low. The test paper strip can be widely applied in the fields of inspection and quarantine, quality monitoring, environment protection, and the like.

The invention discloses a rapid highway electronic toll collection system and method based on IoTs technology. The present invention relates to a highway toll collection system which is characterizedby comprising a vehicle terminal fixed in a vehicle, a data center, an entrance IoTs base station at an entrance of a highway, an entrance vehicle release unit arranged at each ramp entrance, an exitIoTs base station at an exit of a highway, license plate acquisition units arranged at the exit release channels, and an automatic release gate or automatic release gate. Another technical solution ofthe present invention is to provide a highway toll collection system. The toll collection of the highway is realized by means of IoTs technology, the toll collection and releasing manner of the highway is changed into two sections, the toll collection is completed in the first section of area, and in the second section of area, the corresponding vehicles are automatically released according to the toll collection situation in the first section of area, therefore, the passing speed of the highway toll collection area can be greatly improved.

The invention discloses an island detection method based on a negative sequence voltage divider in a distributed power generation system detection technology field. The method is characterized by: firstly extracting an effective value of the negative sequence voltage at a position of a micro-grid common connection point; then calculating a ratio of the effective value to the effective value of a negative sequence voltage source which is added on the common connection point; when the ratio is less than a set threshold, determining that the island is not generated; when the ratio is greater than or equal to the set threshold, determining that the island is generated. By using the method of the invention, under various kinds of fault conditions and other scurviness situations, the island can be effectively detected. The detection is only related to a network topology structure and a pseudo island can not influence the detection. An on-site application requirement can be satisfied and the method possesses actual engineering significance.

The invention discloses transmission line self-adaptive single-end transient protection based on transition resistance and fault angle reductions. When the transmission line is in short circuit, a large amount of high-frequency signals produced by a fault are transmitted to two ends of the transmission line; and owing to affect of earth distributed capacitance of a bus, the high-frequency signals are obviously reduced via the bus, high-frequency component close to the fault side of the bus is invariably higher than that of the fault side of the bus, and the transition resistances and fault angles have a great affect on the high-frequency component produced by the fault. Relative reduction formulas and parameters are selected according to the type of the fault, the transient amount reduction is performed corresponding to the transition resistances and the fault angles, and protective criterion is constructed according to the reduction transient amount. According to the principle, fault feature amount with both directional elements and number comparing functions are constructed on the basis of the transient amount difference of reduction of two sides of the bus to determine a zone the fault occurs in. By the aid of the scheme, the affect to the single-end transient protection by the transition resistances and fault angle is eliminated to a maximum extent. Fault feature differences between the forward direction and reverse direction and inner zone and external zone are obvious, reliability and flexibility are high, the overall length of a line can be protected, protecting areas are twice that of traditional protecting areas, and requirements for the distributed capacitance of the bus are low.

The invention relates to a method for detecting contacts, and a touch panel using the same. The method is suitable for detecting a plurality of contacts and comprises the following steps of: providing a resistance type pressure sensing matrix, wherein the resistance type matrix comprises M X-axis induction lines and N Y-axis induction lines, and when a preset range of the junction between the ith X-axis induction line and the jth Y-axis induction line receives a pressure, the ith X-axis induction line and the jth Y-axis induction line are short-circuited; supplying a scanning voltage to the pth Y-axis induction line in a pth scanning period; detecting the M X-axis induction lines to judge whether any scanning voltage is detected; and determining the touched coordinate to be (q, p) when the qth X-axis induction line receives the scanning voltage in the pth scanning period, wherein M, N, i, p and q are positive integers, i is more than 0, q is less than or equal to M, and p is more than 0 and less than or equal to N.

The invention provides a whole car body bending mode identification method. The whole car body bending mode identification method comprises that the mode shape of each mode of a finite element analytical model of a whole car body in a preset frequency range is obtained; exciting forces in the same direction are applied to two preset exciting points in the finite element analytical model of the whole car body, the frequency response curves of the two exciting points under the exciting forces in the same direction are worked out, the two calculated frequency response curves of the two exciting points are combined into a bending mode identification curve, according to the mode shape of each mode, the mode shape in the frequency corresponding to each peak value of the bending mode identification curve is searched, according to the searched mode shape, the mode shape of the whole car body in a bending state is found out, and therefore all bending modes of the whole car body in the preset frequency range are identified. By employing the whole car body bending mode identification method, the bending mode can be identified relatively accurately, and misjudgement is not liable to occur.

The invention discloses a liquid-absorption core of a grid structure. The core comprises a grid-structure support frame made from flexible materials, meshes of the grid-structure support frame are filled with super absorbent resin, a diversion layer is attached to the lower surface of the grid-structure support frame, a lower non-woven fabric layer is attached to the lower surface of the diversion layer, and an upper non-woven fabric layer is attached to the upper surface of the grid-structure support frame. A manufacturing process of the liquid-absorption core of the grid structure comprises the steps that the diversion layer is bonded to the lower non-woven fabric layer with a hot melt adhesive, the grid-structure support frame made from the flexible materials is bonded to the diversion layer, the meshes of the grid-structure support frame is filled with the granular super absorbent resin, and then the upper non-woven fabric layer is bonded to the grid-structure support frame with the hot melt adhesive. According to the liquid-absorption core of the grid structure and the manufacturing process of the liquid-absorption core, a traditional method of conducting scattering on the fluffy non-woven fabric sparse pores for feeding is replaced, the absorbing capacity of a paper diaper is increased, the dosage of the hot melt adhesive is decreased, and the production cycle is shortened.

The invention discloses a diagnostic reagent kit for trichinosis by employing dot-immunogold filtration assay. The invention has the following advantages: gold labeled SPA is taken as an antibody labeling tag, isopropyl beta-D-thiogalactoside is used for inducing the pMAL-c2X-Ts21 / TB1 recombinant strain, expressing and purifying trichina Ts21 gene-encoded protein (Ts21 antigenic gene, ORF17.20, the access number at GenBank is U88239), after being purified on a nitrocellulose membrane (NCM), the Ts21 recombinant protein coats the detection point T, and human IgG coats the quality control point C, thus constructing Ts21 recombinant protein-dot-immunogold filtration assay (Ts21-DIGFA) and assembling the rapid diagnostic reagent kit for trichina with Ts21 recombinant protein by employing dot-immunogold filtration assay. The kit is simple to operate and has high sensitivity and specificity and good stability and repeatability; the detection results can be observed and judged within 1min immediately after adding samples, the diagnosis results are accurate and clear and misjudgment can not happen; and the kit is suitable for rapid diagnosis and serum epidemiological survey at the scene and is easy to popularize and apply extensively.

The invention provides an ageing failure diagnosis method of an engine catalytic converter, which comprises the steps of: enabling condition judgment, first stage monitoring, second stage monitoring, oxygen storage time calculation, diagnosis judgment and failure diagnosis report, wherein the oxygen storage time calculation also comprises a special diagnosis mode, and can fully consider various conditions generated during the failure diagnosis; judgment conditions are more complete and full and can send related information to an OBD failure diagnosis unit under the condition of incapability of diagnosis so as to be convenient for accurately diagnosing the state of the catalytic converter and preventing from generating error judgment, such as incapability of carrying out failure diagnosis.By using the method, reasons of incapability of carrying out failure diagnosis can be known.

The invention provides an engine fire detection method and a detection device thereof, belonging to the technical field of automobile engines. The invention solves the problems of low detection precision and easy occurrence of wrong judgment of the traditional engine fire detection device. The engine fire detection device comprises a pressure sensor arranged on an engine exhaust system and used for collecting an exhaust pressure wave real-time signal, and the pressure sensor is connected with a central processing unit with a built-in exhaust pressure wave mean-value signal. The engine fire detection method comprises the following steps of: collecting the exhaust pressure wave real-time signal of the engine exhaust system by using the pressure sensor arranged on the engine exhaust system; inputting the collected exhaust pressure wave real-time signal to the central processing unit; and comparing the peak-to-peak value of the exhaust pressure wave real-time signal with the peak-to-peak value of the built-in exhaust pressure wave mean-value signal by the central processing unit. The invention has the advantages of simple signal processing process, difficult interference, high fire detection precision and the like.

The invention discloses an automatic gain control (AGC) device for a global system for mobile communication (GSM) digital optical fiber frequency-selecting repeater and a quick adaptive time slot method for the AGC device. The AGC device comprises a core logic processing device, a coprocessor, an analog / digital converter (ADC), a radio frequency (RF) numerical control attenuator, an RF frequency mixer and a low noise amplifier. The quick adaptive time slot method for the AGC device comprises an adaptive time slot recovering process and a quick automatic gain control process. The invention has the advantages that a time slot recovering threshold value is calculated adaptively, the steps of installing and debugging by engineering staff are reduced, a signal level input into the ADC can be adjusted to a target level value by the adjusting process, an overall adjusting period is short, signal quality is not influenced substantially, the gain balance of an uplink and a downlink which have small signal time slots can be ensured, and the connection quality of users is ensured.

The invention provides an MPPT method based on an optimization model prediction algorithm combined with variable step size disturbance control, and belongs to the technical field of new energy power generation. Firstly, a photovoltaic cell model is constructed, and the output current of the photovoltaic cell is obtained according to the photovoltaic cell model. Then the Z-source network model is constructed and the boosting factor of Z-source network is calculated. Then the function relationship between the output power P and the output voltage U of the photovoltaic cell and the duty cycle D of the switching device of the Z-source network is determined. The topological state space equation of Z-source network is established. Finally, the optimal model prediction algorithm combined with variable step duty cycle disturbance control method is used to achieve the maximum power point tracking of photovoltaic system. The MPPT method based on the optimization model prediction algorithm combined with the variable step size disturbance control ensures the stability of the maximum power point tracking of the photovoltaic system, ensures the stability of the tracking when the external conditions (illumination and temperature) change suddenly, avoids the misjudgment phenomenon, and thus ensures the long-term stable power output of the photovoltaic system.

The invention relates to an infrared switching method and device for a network camera, a storage medium and the network camera. The method comprises the steps of: obtaining real-time data shot by thenetwork camera; judging whether the current time is in the daytime or at night according to the real-time data by utilizing a set classifier, and if the current time is in the daytime, controlling aninfrared light-emitting diode of the network camera to be in a turn-off state; and, if the current time is at night, controlling the infrared light-emitting diode to be in a turn-on state, wherein theset classifier is a classifier, which is obtained by offline learning on an environment, where the network camera is; the definition of an image shot by the network camera in the daytime is greater than a set definition threshold value; and furthermore, the definition of an image shot by the network camera at night is less than or equal to the set definition threshold value. According to the infrared switching method and device for the network camera, the storage medium and the network camera disclosed by the invention, the infrared light-emitting diode can be intelligently controlled to be switched between the turn-on state and the turn-off state only through the set classifier; hardware resources do not need to be extra occupied; and thus, the production cost of the network camera is reduced.

The invention discloses a detection method of self-healing breakdown of a capacitor. The method comprises the following steps of: (1) connecting a detection capacitor with a detection inductor in series, connecting the detection capacitor and the detection inductor in parallel with a detected sample capacitor to form a detection circuit, and connecting alternating current adjustable power supplies at two ends of the circuit; and (2) adjusting the alternating current adjustable power supplies; when the condition that the detection inductor generates a damped oscillation signal, judging that the detected sample capacitor generates the self-healing breakdown. The detection method disclosed by the invention solves the disadvantage of the conventional detection method of the self-healing breakdown by using the capacitor and has the advantages of convenience for use and accurate detection; and the detection method for a self-healing breakdown test of the capacitor is simple and reliable, has good anti-interference performance and ensures that erroneous judgment does not happen.

The invention relates to the electric appliance circuit testing technical field. The invention mainly comprises a bridge rectifier circuit, a self-check button, combined detecting elements, a connector, etc., which are connected in parallel by a plurality of groups of combined detecting elements. The combined detecting element group is composed of three switches and an indicator light. The invention detects a relay circuit by a mode of connecting a plug of the connector and a socket of the connector of a detected element, and avoids short circuit or misjudgement caused by touching contacts by mistake; the invention is of simple circuit structure, convenient using and operation, and improvement of working efficiency.

The invention discloses a method and a system for saving the traffic for accessing a server. The method comprises the following steps: sending a data request to a server by a client, and adding a mark parameter in the data request; obtaining target data by the server according to the data request to generate a unique identifier corresponding to the target data and judging whether the unique identifier is same as the mark parameter or not; if so, not returning back to the target data; if not, assigning the unique identifier to the mark parameter; and returning the target data and the assigned mark parameter back to the client. The method and the system have the advantages that the client generates the unique identifier according to the obtained target data, and whether the unique identifier is the same as the unique identifier which is sent to the client at the last time or not is judged so that whether the target data needs to be sent to the client or not is determined; if so, the target data does not need to be sent; obviously, the unnecessary traffic is saved for a user, and the data received by the client is the newest.

The invention relates to a red tide detection method based on an aerial hyperspectral image. Firstly, an aerial hyperspectral image of a sea area is measured by an airborne hyperspectral imager AISA; then digital quantization values of the wavelengths of 557-584 nm, 530-557 nm, 467 nm and 512 nm are selected from digital quantization values of the image wavelengths of 450-700 nm, and a curve area specific value between the digital quantization values of the wavelengths of 557-584 nm and 530-557 nm and a normalized blue-green waveband difference value between 467 nm and 512 nm are calculated; when the DN curve area specific value is greater than 1.077, and the normalized blue-green waveband difference value is smaller than 0.245, a picture element is a detected-out red tide picture element; and red tide picture elements which are connected into be in a flake shape or in a ribbon shape are decided as a red tide occurrence sea area. Directly according to the digital quantification values of the aerial hyperspectral image, radiometric calibration, atmospheric correction and other pretreatment on the image are not required, and definite and fast detection of red tide occurrence is achieved.