249results about How to "Overcoming reliability" patented technology

The invention discloses a temperature-controlled crack prevention construction method for a concrete structure. The method comprises the steps of (1) arranging temperature probes on the surface of a large-size concrete pouring block to measure the temperature difference between inside and outside, the cooling rate of the large-size concrete pouring block and the environment temperature; (2) establishing a calculation model for the temperature-controlled construction scheme based on the obtained measuring result; (3) collecting the construction site parameters, and inputting the parameters into the obtained calculation model for temperature-controlled simulation calculation; and (4) comparing the temperature-controlled simulation calculation result obtained in the step (3) with the preset auxiliary expert system, repeating the step (2) to adjust the corresponding parameters when the temperature-controlled simulation calculation result obtained in the step (3) and the preset auxiliary expert system mismatch, and optimizing the temperature-controlled crack prevention construction scheme for concrete preset based on experience until the optimal temperature-controlled crack prevention construction scheme for the concrete is obtained. The temperature-controlled crack prevention construction method for the concrete structure disclosed by the invention has the advantages that the concrete is not prone to crack, the crack prevention reliability is high, and the crack prevention commonality is good.

The invention relates to an auto-stability method for camera image and the auxiliary device used in hand held state or motion state. It uses angular velocity sensor to check the angular velocity of the camera rotating round the three space axes in real-time and records synchronistical with image signal. The variance of the attitude angle between two pictures would be gained by integral in afterward process software, and the attitude angle variance related to slow-varying low frequency element in motion angular velocity is reserved, meanwhile the attitude angle variance related to dithering angle element would be eliminated. Then, the image dithering would be eliminated by translation and rotation the image. The device is made up of three same circuits. And every process circuit is connected by angular velocity checking circuit which is belonged to signal collection circuit, power lever shifting circuit which is belonged to signal process circuit, voltage/frequency transformation circuit, frequency division circuit, wave transformation circuit, signal compound and extent regulation circuit in series. The output signal is sent to the interface of camera.

The invention discloses an oil return control device, an air conditioning system and an oil return control method of the air conditioning system. The oil return control device comprises an oil separation mechanism and an oil return control assembly, wherein the oil separation mechanism is arranged at an exhaust port of a lower row of exhaust cylinders in a compressor comprising two or more parallel cylinders, and is used for separating and obtaining lubricating oil from exhaust gas of the lower row of exhaust cylinders, and the oil return control assembly is arranged between the oil separationmechanism and an oil pool at the bottom of the compressor, and is used for controlling the lubricating oil to return to the oil pool according to the pressure difference between exhaust ports of thetwo or more exhaust cylinders in the compressor. According to the scheme, the defects that in the prior art, a lower cylinder is prone to wear, short in service life, low in running reliability and the like can be overcome, so that the beneficial effects that the lower cylinder is not prone to wear, long in service life and high in running reliability are achieved.

The invention relates to a method for forecasting short-term wind speed of a wind farm based on hybrid neural network. The method comprises the following steps: S1, determining an input variable and an output variable of a hybrid neutral network forecasting model according to a preset forecasting time interval; and S2, forecasting the wind speed according to the hybrid neutral network forecasting model to obtain corresponding wind speed forecasting value. The invention also relates to a system for forecasting short-term wind speed of the wind farm based on the hybrid neural network. The system comprises a variable determination module for determining the input variable and output variable of the hybrid neutral network forecasting model according to the preset forecasting time interval; and a forecasting module for forecasting the wind speed according to the hybrid neutral network forecasting model to obtain the corresponding wind speed forecasting value. The method and the system provided by the invention have advantages of high computation speed and high reliability, solve the technical problem completely depending on a physical forecasting model and overcome the disadvantage of large forecasting error fluctuation based on a single model.

The invention relates to a float type level gauge for on-site indication, which comprises a float, a graduated scale and a noctilucence wheel, and is characterized by further comprising a conducting or magnetic conducting guide rail, wherein the noctilucence wheel comprises an insulating box, a light source, two longitudinally arranged magnetic shafts or metal shafts, and two conducting wires for supplying power to the light source; for a magnetic float type level gauge, the noctilucence wheel also comprises a steel magnet; under the magnetic action, the magnetic shafts or the metal shafts, along with upward and downward movements of the float, move upwards and downwards along the guide rail so as to indicate the liquid level on-site accurately in time; or a resistance wire is enwound on the guide rail, and the resistance value of a conducting loop comprising the guide rail, the magnetic shafts or the metal shafts, the conducting wire, the light source and the like is measured to acquire a corresponding liquid level value so as to achieve the continuous long-distance transmission of liquid level data. The float type level gauge can also comprise a pulley wheel, a counterbalance, a connecting rope or a connecting belt to balance the noctilucence wheel. The float type level gauge has the significant characteristics of simple structure, clear and obvious on-site indication, flexible and accurate measurement and continuous long-distance signals.

The invention discloses an air conditioner temperature control method and device and an air conditioner. The method comprises the steps that the air conditioner running mode, the indoor unit air gear, the air deflector angle, the indoor unit environment detecting temperature and the set temperature are obtained; according to the preset corresponding relation of the preset air conditioner mode, the preset air gear, the preset angle and the preset compensation temperature, and the preset compensation temperature corresponding to the running mode, the indoor unit air gear and the air deflector angle is determined; compensation is conducted on the indoor unit environment detecting temperature according to the determined preset compensation temperature, and accordingly the actual indoor unit environment temperature of the air conditioner is obtained; and according to the difference value between the set temperature and the actual indoor unit environment temperature, the frequency of a compressor of the air conditioner is adjusted in an adaptive manner till the difference value meets the preset range. According to the scheme, the defects that in the prior art, accuracy is poor, reliability is low, and the user experience is poor can be overcome, and the beneficial effects that the accuracy is good, the reliability is high, and the user experience is good are achieved.

The invention discloses an axial magnetic field modulated brushless double rotor motor, belonging to the motor field and solving the problems that the operating efficiency is lowered and the reliability is reduced because the winding rotation in a double rotor motor introduces the current through an electric brush and a slip ring, and the components, such as electric brushes and the like need to be maintained. The two stators of the invention are fixed the left end and the right end of a shell; a modulated ring rotor is positioned between the two stators and outside a permanent magnet rotor; a prime motor drives the permanent magnet rotor to rotate to form a 2n pole magnetic field; the stator is electrified to form a 2p pole magnetic field; the 2n pole magnetic field and the 2p pole magnetic field are modulated by the modulated ring rotor; q magnetic-conducting pieces and q insulated pieces are arranged on the end surface at the two sides of a stator frame of the modulated ring rotor along the peripheral direction in an interlacing manner; the relational expression that p is equal to the absolute value of the sum of hn and kq is satisfied, which is given to the load by the output shaft of the modulated ring rotor in different rotating speed; and the axial magnetic field modulated brushless double rotor motor of the motor of the invention has two structures, one structure is in axial symmetrical type, and the other structure is in axial unilateral type. The motor of the invention is used for the occasions of electric automobiles, wind power generation and torpedo drive.

The invention relates to a vehicle behavior monitoring system based on radar and video group, and a realization method thereof. The system comprises multiple sets of monitoring terminal equipment, multiple sets of data communication equipment, data storage equipment, a background data processing server, a vehicle driving state display module and the like; the monitoring terminal equipment is composed of a millimeter wave radar, a high-definition camera, a front-end data processing unit module and a power control module. Compared with the prior art, the system disclosed by the invention realizes the advantage complementation of the millimeter wave radar data and the high-definition video image data on traffic data acquisition by deeply fusing the millimeter wave radar data and the high-definition video image data, so that the detected data type is more comprehensive, and the accuracy, reliability and robustness are further improved by steps, thereby being beneficial to providing technical support for the aspects of traffic control, safety early warning and the like.

The invention relates to a float type level gauge for high-temperature high-pressure or high-temperature low-density medium, comprising a float chamber, a float and a graduated scale; the float type level gauge is characterized in that: the float is a hollow spherical shape; the float type level gauge further comprises a guide rail and a magnetic connector, a magnetic steel or a disc-shaped magnetic steel is arranged in the magnetic connector and forms magnetic attraction with a magnetic ball body in the float made of the nonferrous magnetic material or the disc-shaped magnetic steel the float made of the nonferrous magnetic material, a metal shaft laterally spanned at two side walls of the magnetic connector is exposed to two side walls and is attached to the guide rail by magnetic force, and the metal shaft can move up and down along the guide rail under the driving of the magnetic force; in addition, resistance wires are wound on the guide rail to measure the change of the resistance value of a return circuit, so as to realize continuous remote transmission of a signal. The float type level gauge for high-temperature high-pressure or high-temperature low-density medium solves the difficult problem of liquid level measurement in the high-temperature high-pressure or high-temperature low-density medium and has high measuring precision; in addition, the structure is simple, the usage is convenient, the manufacturing and maintaining cost is low and the application is wide.

The invention discloses a control method and a control device of an electric oven and the electric oven. The method comprises the following steps: when the electric oven heats to a preset target temperature under a heating mode, stopping heating; determining a heating duty ratio of the heating mode within a preset heating cycle, wherein the heating cycle includes the heating mode and a temperature maintaining mode after stopping heating; and conducting heating by virtue of the electric oven in accordance with the heating duty ratio. The scheme disclosed by the invention can overcome shortcomings of the prior art which is uneven in temperature, low in reliability, poor in user experience and the like, and the beneficial effects of uniform temperature, high reliability and good user experience can be achieved.

The invention discloses a low-altitude target tracking system based on a FPGA. The low-altitude target tracking system comprises an image acquisition module for initially configuring a video decoding chip, wherein the image acquisition module decodes a data format on a video decoding chip bus to extract a video field, line and effective pixel data, and extracts the pixel gray level; the to-be-processed pixel and neighborhood value are registered in the preprocessing module to form a filter window, the FOFI and the data in the register are updated once at each gray level clock so as to obtain a new filter window; the data in the filter window is sorted and selected to obtain a filter mid value; a target segmentation module for performing sub-window region average gray value computation, dynamic dual-threshold computation and binarization; a target positioning module for performing centroid computation and prediction; a communication module for sending a target centroid coordinate; and a cradle head control module for controlling a cradle head to rotate according to the centroid position of a target, and controlling the target at the view center of a camera.

The invention discloses a noise reducing method and system, an electronic expansion valve and an air conditioner. The method comprises the steps that a primary sound source of environmental noise is collected, wherein the environmental noise comprises electronic expansion valve noise serving as a noise source and/or near-field noise of the noise source; active noise reducing processing is performed on the environmental noise on the basis of the collected primary sound source. According to the scheme of the noise reducing method and system, the electronic expansion valve and the air conditioner, the detects that in the prior art, the noise reducing effect is poor, the application range is small, and the reliability is low are overcome, and the advantages of being good in noise reducing effect, large in application range and high in reliability are achieved.

The invention discloses a method for identifying a shielded face on basis of blocks and identification of non-negative matrix factorization. The method is adopted for solving the problem of low identifying rate for the large-area continuously shielded face of the prior art. According to the technical scheme, the method comprises the following steps: 1) constructing a data matrix and a No.k block non-negative matrix of a training dataset; 2) constructing a weight matrix and a new inter-category divergence matrix according to the cosine similarity between the categories of the data matrixes, thereby forming a new target function; 3) performing optimization solution on the target function, thereby acquiring a basis matrix and a coefficient matrix; 4) constructing a No.k block test data matrix of a test set, and projecting the No.k block test data matrix on the basis matrix, thereby acquiring a projecting coefficient matrix; 5) calculating distances from each column vector in the projecting coefficient matrix to all the column vectors in the coefficient matrix, and utilizing a weight fusion criterion to acquire the category of each image in the test set. An experiment proves that the identifying rate for the large-area continuously shielded face is increased according to the method provided by the invention and the method can be applied to the field of personal identification and information safety.

The invention discloses a vehicle detection method. A detection area is set on a field image to be detected, the field to be detected is subjected to video monitoring, and the detection for vehicles is completed by utilizing line bumping records of the vehicles passing the detection area. The vehicle detection method adopts the virtual detection area set in the field image to be detected to replace an entity detection sensor adopted by the prior detection means so as to overcome the inherent defects of poor reliability, short service life, high maintenance difficulty, large destructiveness on surrounding environment and the like of the prior detection means, has the obvious advantages of quick and precise detection, small computation, good real-time, high measuring accuracy and the like, and can be applied to various urban road conditions.

The invention provides a portable intelligent charger of an electric car. The portable intelligent charger comprises a rechargeable battery, a weak current controlling and protecting module which is connected with the rechargeable battery, and a power factor correcting module which is connected with the weak current controlling and protecting module, wherein a resonant inverter rectifying module is connected between the rechargeable battery and the power factor correcting module; and a power device driving module connected with the weak current controlling and protecting module is arranged on the resonant inverter rectifying module. The portable intelligent charger can be used for overcoming the defects that the charger of the existing electric car is low in charging efficiency, low in reliability, high in power grid pollution and the like. The portable intelligent charger is high in charging efficiency as well as safe and stable to use.

A pre-alarm device of automobile driver fatigue-driving in active mode consists of the first signal collection unit for collecting steering wheel state, the second signal collection unit for collecting pulse signal of speed mileage, an alarm control unit for presetting alarm time reference and for receiving signals collected by two said signal collection units as well as for outputting alarm signal according to received signals, and an output alarm unit for making alarm according to alarm signal of alarm control unit.

The invention discloses an RFID (Radio Frequency Identification) system capable of ensuring confidentiality and data integrity and an implementation method thereof. The system comprises an RFID tag, an RFID reading-writing module and a background service module, wherein the RFID reading-writing module is used for obtaining a communication key from the RFID tag and carrying out secret data interaction with the RFID tag based on the communication key, and the background service module is used for providing data storage and secret interaction service for the data interaction between the RFID tag and the RFID reading-writing module; and the background service module, the RFID reading-writing module and the RFID tag are sequentially connected. The RFID system capable of ensuring confidentiality and data integrity and the implementation method thereof provided by the invention can overcome the defects of poor security, easiness in failure, poor reliability and the like in the prior art so as to realize the advantages of good security, non-easiness in failure and good reliability.

The invention discloses a method and a device for determining the water content of a fresh concrete mixture based on dielectric constant. According to the method, a relative dielectric constant of concrete is tested based on the propagation rate attenuation of an electromagnetic wave in the fresh concrete mixture and the reflection principle of the electromagnetic wave on a metal plate of a testing device, and then, in accordance with the principle that the relative dielectric constant is relatively sensitive to water, the propagation velocity of the electromagnetic wave in the fresh concretemixture is enabled to vary so as to lead to the variation of the relative dielectric constant, thus the water content of the fresh concrete mixture can be measured. The method has the characteristicsof no contact between an electromagnetic transmitting and receiving device and a tested object, large testing area and wide water ratio testing range. The method can be used for overcoming the defectthat the traditional method is insufficient in concrete adaptability, largely impacted by environment, inaccurate and unreliable, has greatly increased precision and speed in testing the relative dielectric constant of concrete, and has the characteristics of great simplicity in manufacturing testing device, good simplicity and convenience, accurate test results and outstanding operation easiness.

The invention discloses a control circuit used for sharing average inductance and current of a DC-DC converter. The circuit comprises a current detection resistor R1, a signal detection amplifier, a data acquisition and storage device, a clock, an adder, a divider, a comparator, a pulse modulation controller PWM (Pulse-width Modulation), a switching tube V1, an inductor L1, a diode D1 and a capacitor C1. The control circuit used for sharing inductance and current of a DC-DC converter disclosed by the invention can overcome the defects of slow detection speed during current sharing, low accuracy and reliability of constant-current control and current-limiting protection and the like in the prior art, and has the advantages of quick current detection speed, and high accuracy and reliabilityof constant-current control and current-limiting protection.

The invention relates to a portable power source renting method and device. The portable power source renting operation is conducted through the device by means of a central processing unit and at least one charging unit connected to the central processing unit, and the single-grade control of the central processing unit over the charging units is realized. It is ensured that a user quite conveniently rents a portable power source in a self-service mode from the portable power source renting device, the defects that due to the graded control adopted by an existing portable power source renting device, the control speed is low and reliability is not high are overcome, the portable power source renting reliability and reaction speed are improved by means of the single-grade control, the portable power source renting device is simple in structure and low in cost, and user experience is greatly improved.

The invention discloses a system and an array for tracking solar energy linearly. In the invention, various solar energy optical mirrors of which the focuses are in a straight line are adopted. In a solar energy tracking process, the solar energy optical mirrors move on an axis of a straight focus line instead of an axis of the bottom line of the conventional solar energy optical mirror, and the focus line is kept still all the time or at rest relative to the ground. In the invention, the structural design that the focus line does not move is adopted, so a heat tube can be applied in heat transfer of the system; and meanwhile, other heavy solar energy-using equipment, such as solar energy photovoltaic generating equipment, a stirling generator and other kinds of large equipment, can be arranged on the focus line, so the solar energy tracing and utilization can be realized by a small drive force. The invention provides an array structure of the system to facilitate massive solar energy utilization, particularly the application of the solar energy in aspects of solar energy thermal power generation, solar energy heating, solar energy cooking, solar energy refrigeration and the like.

The present invention discloses a display device and a driving method. The display device comprises a display panel and a source driving circuit. The display panel is composed of a plurality of pixel units, a plurality of scanning lines, a plurality of data lines and a plurality of gate driving circuits. Each row of the pixel units is correspondingly connected with one scanning line. Each column of the pixel units is correspondingly connected with one data line. The plurality of gate driving circuits are used for supplying first driving signals to the plurality of scanning lines. The source driving circuit is used for supplying second driving signals to the plurality of data lines. Each scanning line is connected with two gate driving circuits. Compared with the prior art, in the low-temperature condition, each pixel unit of the display device can be simultaneously driven by a circuit better in driving capability. Therefore, the narrow-frame effect is realized based on the integrated gate driving circuit technology, while the defect that transistors in the display device are not stable and low in reliability is overcome at the same time.

The present invention relates to a disaster recovery method and system of a wireless controller. The method comprises: an active wireless controller synchronizing key service data to a standby wireless controller through a synchronization channel pre-established by the active wireless controller and the standby wireless controller; the standby wireless controller constructing other required related service data according to the received key service data; the active wireless controller and the standby wireless controller detecting whether the active wireless controller side has an exception by using a link detection mechanism, wherein if yes, the standby wireless controller is switched to the active wireless controller to avoid service interruption. The present invention reduces the impact brought by an AP, so that the active wireless controller efficiently and reliably synchronizes data without affecting the service processing, and the standby wireless controller is avoided from being configured again, thereby reducing mistakes, saving the labor cost, avoiding interruption of the wireless service, and improving system reliability.

The invention discloses an elevator energy-saving system, which comprises an energy storage device, a charging and discharging controller and a rectification circuit, wherein an alternating current side of the rectification circuit is electrically connected with an external power source, or is electrically connected with the other alternating current power source independent from the external power source; a switch controller is respectively connected with a bus voltage detector, a current detector and a power switch through signal lines; and turning on and off of the power switch are controlled by the switch controller, so that transmission of regenerated energy to a second direct current bus can be realized, so as to supply power to non-motor load of an elevator. With the adoption of the elevator energy-saving system and the control method thereof, not only can the regenerated energy be stored when a motor of the elevator is in a regenerated state, and is the stored energy released to the first direct current bus to provide electric energy for the motor of the elevator, so as to realize energy saving of the elevator when the motor of the elevator is in an electrical state, but also the regenerated energy is preferentially provided to the non-motor load of the elevator, so as to improve the ability of continuously regenerating of the energy storage device corresponding to the elevator. The elevator energy-saving system also discloses a control method of the elevator energy-saving system.

The invention discloses a circuit board welding quality detection method and device. The method comprises the following steps: scanning a to-be-detected circuit board by adopting laser; acquiring a laser stripe image on the circuit board to be detected; processing the laser stripe image to obtain an offset value of a laser line; and comparing the deviation value with a standard value, when the difference value between the deviation value and the standard value is greater than a preset threshold value, determining that the welding quality of the circuit board to be tested is unqualified, and when the difference value is less than the preset threshold value, determining that the welding quality of the circuit board is qualified. According to the invention, the deviation value of the laser ray is obtained, and the deviation value is compared with the standard value to judge whether the laser ray is qualified or not, so that the problems of low reliability and low efficiency of a traditional manual detection method are solved, and the automatic detection of a machine, high working efficiency and low false detection rate are realized.

The invention discloses an independent axle lifting device and method. The device comprises a lifting support, an airbag assembly and lifting bolts. The lifting support is mounted between the side faces of a pair of longitudinal beams of an automobile frame with an axle. The airbag assembly is mounted on the lifting support. The lifting bolts are mounted on the airbag assembly and are arranged to achieve lifting or putting-down of the axle based on inflation or deflation of the airbag assembly. According to the scheme, the defects that in the prior art, reliability is low, the energy saving performance is poor, and universality is poor can be overcome to achieve the advantage of being good in reliability, energy saving performance and universality.

The invention discloses an isolating switch control system of a locomotive terminal, mainly consisting of an operation table and a relay box. The invention is characterized in that the isolating switch control system of the locomotive terminal also comprises a host computer and an executing mechanism; the number of the operation table is one and more than one and the output end of each operation table is connected with the input end of the executing mechanism by the relay box in sequence; and simultaneously the input end of each operation table is connected with the host computer. The invention also provides a control method, comprising the steps of: manufacturing a non-contact driver card, a submitting card and a reply card by operating the host computer by a reply operator; carrying out brake-separating operation by pressing a divide-shut brake button by an operator and starting an electric mechanism till the divide-shut brake of the isolating switch is in place and the like. The isolating switch control system not only can effectively overcome the serious defects that in the traditional isolating switch control system, the overvoltage protection measure is not perfect and the safety reliability is not enough and the like, but also can realize the control to the isolating switch of the track in a one-to-one mode, thus being capable of meeting the requirements of a client well.

The invention relates to a power-system direct current power transmission line relay protection field and especially relates to a single-terminal electric-quantity whole-line quick action protection method which can be used to identify faults in and out of an HVDC transmission line area. An amplitude of a specific frequency component in a single-terminal direct-current filter branch is used to realize discrimination of the faults in and out of the area. The method of the invention is used to protect a single-terminal whole-line quick action in the direct current power transmission line of the power system. The protection can be achieved only by using the single-terminal electric quantity. The method has a low requirement to a sampling frequency. An algorithm is simple. Sensitivity is high. The method can be realized during engineering. The action speed is fast, selectivity is good and reliability is high. A theory is completed and is easy to be adjusted. The protection method of the invention can replace current traveling-wave protection which is taken as the main protection of the direct current power transmission line. And the method is especially suitable for realizing the whole-line quick action protection of the ultra/super HVDC power transmission line by using the single-terminal electric quantity.

The invention discloses an array-type multi-channel fiber-process Fabry-Perot pressure sensor and a pressure measurement method. From the input end to the output end, the pressure sensor is sequentially provided with an LED (light-emitting diode) light source array (3) composed of an LED light source modulation module (1) and LED light sources (2), a fiber coupler array (5) composed of fiber couplers (4), a fiber Fabry-Perot sensor array (7) composed of fiber Fabry-Perot sensors (6), a demodulation light path module composed of a fiber array (8), an optical wedge (9) and a linear array CCD (charge-coupled device) (10), and a signal processing unit (11). Compared with the prior art, by combining the LED light source array modulation with the fiber array structure, the invention implements sequential quick demodulation of multiple fiber Fabry-Perot pressure sensors by using a single demodulation light path, and solves the problem that the traditional light switch structure can not simultaneously meet the requirements of high-speed switching, low loss and high reliability; and the channel expansion is easy, so that the number of the sensing channels can be up to 64.

The invention discloses a method for testing the fatigue damage of an inorganic binding material stabilizing material, and belongs to the field of road engineering. The method comprises the following steps of: cutting a vibration moulding large beam test piece serving as matrix into a plurality of small beam test pieces which meet the specification, determining the fatigue load of the small beam test pieces on the same layer through the bending strength test of the small beam test pieces on the same layer, performing four-point bent beam dynamic repeat load test on the basis, measuring the central deflection change of small beams in the test process to obtain the decay law of dynamic bending modulus along with fatigue load frequency in the approximately actual stress state, and the growthlaw of the bending stress along with the fatigue load frequency, and performing the repeat load test under the conditions of different stress ratios according to the method to obtain the fatigue damage life of the inorganic binding material stable broken stone material. Compared with the conventional fatigue test method, the method overcomes the technical problems of large fatigue failure load frequency variation and low reliability of a fatigue equation in the conventional fatigue test method, realizes the accurate estimation of the fatigue life of the inorganic binding material stable broken stone material, discloses the fatigue damage law of the inorganic binding material stable material, improves the reliability of road design and has good popularization and application value.