70results about How to "Not affected by interference" patented technology

The invention discloses a method for converting a boundary element by an extra-high voltage direct current transmission line mode voltage S, comprising the following steps: when the direct current line is in fault, after a protective element is started, the line mode voltage is obtained by utilizing a phase mode transformational theory according to the two-pole direct current voltage detected on a protection installation part; a dispersion line mode voltage signal is selected to perform S conversion, wherein the sample sequence length is 200 points, and the conversion result is 101*200 time frequency complex matrix; mode calculation is performed on each element in the complex matrix; the high-frequency energy and the low-frequency energy of the line mode voltage are extracted according tothe obtained mode matrix; the ratio of the high-frequency energy and the low-frequency energy of the line mode voltage is calculated; the faults in the cell and out of the cell are distinguished according to the ratio of the high-frequency energy and the low-frequency energy. A large amount of stimulated results prove that the method of the invention has better effect.

The invention relates to an EMD (Empirical Mode Decomposition) based boundary element method for ultra high voltage DC transmission lines, which comprises the following steps of: when DC lines break down, after a protective element is started, resolving line-mode voltage by using the phase-mode transformation theory according to DC voltages at both poles measured at the installation position of the protective element; performing EMD on discrete line-mode voltage signals with the sequence length of 100 dots to obtain m IMF (Intrinsic Mode Function) components; on one hand, resolving the absolute value of each IMF component, and on the other hand, carrying out Hilbert transformation on each IMF component subjected to EMD to work out an instantaneous frequency; dividing the product of the absolute value of an instantaneous amplitude and the corresponding instantaneous frequency by a sampling frequency to obtain an instantaneous kt value; adding m instantaneous kt values together; and taking the maximum in time-domain space as the ultimate criterion k to distinguish faults in or outside areas. A large number of simulation results show that the method has good effect.

The invention discloses an integrated underwater thruster driving system and a control method, which realizes the integrated underwater thruster sensorless control. A linear back EMF sliding mode observer based on fuzzy switching gain adjustment is provided, The observer adopts a smooth hyperbolic tangent function and fuzzy rules to realize change of a gain value and reduce the chattering of the system, so that the control system can obtain smooth back EMF estimates without adding a low pass filter and a phase compensation module, thus avoiding the phase lag of the back EMF estimates. The lineback EMF estimates are corresponded to three virtual Hall signals and six discrete commutation signals are obtained directly without the need of fixed phase shift circuit and calculation of phase shift angle. the invention realizes the integrated underwater thruster sensorless control by estimating the line back EMF of the brushless DC motor loaded in the underwater thruster,.

The patent refers to the field of 'measuring of length, thickness, or similar linear dimensions and angles, areas,irregularities of surfaces or contours'. The invention discloses an automatic axial internal clearance measuring meter for a tapered roller bearing of an automobile gearbox. The measuring meter is characterized by consisting of a frame (10), a workbench (9), a lower external pedestal (27), a lower rotating shaft (21), a lower internal table (20), a driven pulley (38), a steel ball (40), a speed regulating motor (2), a driving pulley (43), a pulley (44), a tensioning component (35), a load hanging plate (32), a lower load bracket (31) capable of moving up and down, a load rod (30), a load (29), a measurement hanging plate (22), a meter clip (24), an inductance measuring head (23), a measuring lever (25), a bracket (3), a yoke plate (5), a compressing cylinder (12), a bearing housing (6), a movable plate (4), a door-shaped bracket (8), a guide rod (7), a pressurizing cylinder (13), an upper external pedestal (16), an upper rotating shaft (15), an upper internal table (18), an air supply system and an electric operation box (14). The automatic axial internal clearance measuring meter ensures the safety and reliability of the bearing by controlling the accuracy of the axial internal clearance of the gearbox so as to meet the requirements on high load and high efficiency of the automobile gearbox and ensure driving safety of the automobile.

The invention provides a video monitoring system based on the internet of things, and relates to the field of the video monitoring. The problem that the existing internet of things needs to reconstruct an internet of things base station can be solved. The video monitoring system comprises a cloud server, and at least one communication base station connected with the cloud server, wherein each communication base station is connected with at least one set of video processing equipment; the video processing equipment and the video monitoring equipment are in one-to-one corresponding connection, each communication base station is loaded on lighting equipment, and each communication base station and the connected video processing equipment and video monitoring equipment form a local area network. The video monitoring system is used for the video monitoring.

The invention is a video display unit for automobile monitoring system, transmitting monitored data of camera and backing-up radar installed on an automobile to a digital video decoder and a microprocessor, where the digital video decoder decodes the video data into specific data format to send to a timing controller which combines the video data of the specific data format with obstacle distance data sent from the microprocessor and then sends the combined data to a digital video coder to reduce to analog signal to output to a display for displaying, and a complete independent monitored video, an obstacle distance value display region and an obstacle distance variation animation are generated on the display; by the above technique, the invention provides a display interface with affinity, making a driver able to more effectively know the peripheral conditions but not disturbed and influenced visually.

The invention discloses a processing system, a method and a hand-held terminal for translating displayed text information, the hand-held terminal is adopted for getting the text information which is displayed according to original language from an electronic display board through the short-distance wireless transmission way, finding the corresponding target language of the text information which is displayed according to the original language through the preset information of a multi-language text library, translating the got displayed information to target text and displaying the target text on the handheld terminal, and the near field communication (NFC) way is adopted for translating the text information displayed according to the original language to the text information in the target language of a user in a real-time manner, thereby providing convenience to the user, avoiding being affected by environmental interference, being strong in applicability and reducing the cost. The hand-held terminal can also be used for connecting to wireless Internet, thereby performing on-line updating and upgrating on language text packs. Furthermore, by adopting the invention, the text information displayed in the various languages can be simultaneously translated to translation in the target language of the user with high efficiency.

This invention relates to time simultaneous code address direct state to realize the upper and down row switching method, which comprises the following steps: control center getting the base state position information and two switching time information through wireless network controller or base state; then sending the information to the computing and control module through communication linkage; compute and control module using satellite positioning receiver to get the direct state position information and standard time to get the wireless wave transmission delay and then to compute the accurate state conversion time spot and to generate control signals to control the switching of the linkage.

The invention discloses a global synchronous pulse width modulation self-synchronization method in the communication failure state, and by means of the method, grid-connected inverters can still maintain the global synchronous operation state under the circumstance of communication failure, the states of all the grid-connected inverters are not needed to be changed, and the advantages of the global synchronous pulse width modulation method are given full play. The method comprises the steps that a global synchronization unit sends a synchronizing signal to the grid-connected inverter M and sends the synchronizing signal transmission frequency fsyn to the grid-connected inverter M, and the grid-connected inverter M calculates out the crystal oscillator error between the grid-connected inverter M and the grid-connected inverter 1 according to the synchronizing signal; the grid-connected inverter M sets self-synchronization parameters according to the calculation result; the grid-connected inverter M predicts the moment when the synchronizing signal appears next time according to received delta Tsyn, if the synchronizing signal appears, a communication system works normally, self-synchronization is not needed to be conducted, if the synchronizing signal does not appear, communication system failure occurs, and the grid-connected inverter M conducts self-synchronization.

The invention discloses an electric energy quality detection method on the basis of generalized morphological open-close and close-open wavelet transform, which comprises the following steps: 1, acquiring a signal for electric energy quality detection and carrying out normalization; 2, carrying out a first layer of generalized morphological open-close and close-open wavelet transform processing on the normalized sginal and then extracting signal characteristics of a trapped wave and transient oscillation; 3, carrying out a second layer of generalized morphological open-close and close-open wavelet transform processing on an approximate signal obtained after the first layer of generalized morphological open-close and close-open wavelet transform processing and then extracting signal characteristics of a harmonic wave; 4, carrying out a third layer of generalized morphological open-close and close-open wavelet transform processing on an approximate signal obtained after the second layer of generalized morphological open-close and close-open wavelet transform processing and then extracting signal characteristics of voltage swell, temporary voltage drop and voltage momentary interruption; 5, according to the extracted signal characteristics, judging electric energy quality. The electric energy quality detection method has the advantages of small calculated amount, high response speed and strong resistance to noise interference.

The invention relates to an automatic return gear for a motor of an intelligent electronic type contactless two-way rotary windscreen wiper. The gear is mounted at an end cover of the motor body; an origin positioning steel magnet and an inflection point positioning steel magnet which rotate with the gear are embedded on the gear and move along two different circumferences of the same gear. The automatic return gear is applied to the intelligent electronic type contactless two-way rotary windscreen wiper and overcomes the long-existing defects that a mechanical contact type motor is cumbersome in structure, short in service life, high in failure rate, unstable in quality, difficulty in mounting. Moreover, no interference radiation is generated during the operation of the motor, and other electronic equipment in the vehicle can be protected from interference. Especially, a transmission assembly structure in a windscreen wiper assembly is eliminated. Therefore, due to the adoption of the automatic return gear, the windscreen wiper assembly is simpler in structure and lower in using cost. The automatic return gear fills the blank home and abroad in the field of motor industry of the automobile windscreen wipers.

The invention discloses a safety sealed detonation device and a safety detonation method, belonging to the construction field of oil-gas well perforating operation and building foundation pit blasting, and aiming to solve the problem that the traditional detonator cannot realize integrative sealing. The device comprises a detonation device lifting pipe fitting, a pressure relief and chip removal hole, a positive sealing device, an explosion joint, a firing gear crash helmet, a firing gear, a miniature detonation device, a detonation propagating device and a negative sealing device, wherein the miniature detonation device and the firing gear are arranged on the detonation propagating device in order; the firing gear crash helmet is buckled on the firing gear, and the positive sealing device is arranged between the firing gear and the explosion joint; the detonation propagating device comprises a detonation propagating shell, a booster primer and an energy cavity, the energy cavity is positioned in the bottom of the detonation propagating shell, and the booster primer is arranged in the detonation propagating shell. The device self is wholly sealed, can still keep good leakproofness and detonation capacity in the under environment, and is not easy to be affected with damp and lose efficacy after meeting water.

The invention relates to a temperature, pressure and humidity monitoring sensor, which belongs to the technical field of environment monitoring and solves a problem that the existing temperature, humidity and pressure sensor cannot simultaneously output analog and digital signals. The temperature, pressure and humidity monitoring sensor comprises a shell, an electrical connector and a threaded base; the threaded base and the electrical connector are respectively welded together with the shell to form a closed cavity; a sensing module, a signal processing module and a signal interface module are arranged in the shell, and the sensing module is used for acquiring inner and outer pressure, temperature and humidity in environment in real time; the signal processing module is used for analyzingand processing the acquired environment information; and the signal interface module is used for transmitting digital and analog signals to the outside. According to the temperature, pressure and humidity monitoring sensor provided by the invention, a sensor technology and a microprocessor technology are combined organically, a plurality of functional modules are integrated on the sensor, the environment can be acquired in real time and processed, high-precision real-time monitoring for absolute pressure, relative pressure, humidity and temperature of a tested environment can be realized, anddata output is provided through analog and digital modes.

The invention relates to an unmanned system space positioning method based on an LED light source. A positioning device involved in the method comprises LED light sources with identity information, anoptical detection component, a data processing board and a software algorithm. The LED light sources distributed in the motion space of an unmanned system emit optical signals with identity information, the data processing board drives optical detection components on the unmanned system to collect the spatial position and identity information of each LED light source under the control of a software algorithm, and the software algorithm analyzes the self-positioning of the unmanned system from the information. The indoor and outdoor space positioning method is provided for the unmanned systemby utilizing the LED light sources with the identity information, and the method can independently become a space positioning mode of the unmanned system, and can also become a calibration means for positioning modes such as satellite positioning, visual positioning, laser slam positioning, ultrasonic navigation positioning and aircraft calculation positioning.

The present disclosure provides an air conditioning controlling system based on the Internet of Things, and relates to the technical field of the Internet of Things. The problem that a base station ofthe existing Internet of Things needs to be re-established is solved. The air conditioning controlling system based on the Internet of Things includes a cloud server and at least one communication base station connected with the cloud server; and each communication base station is connected with at least one data processing equipment, the data processing equipment is connected with air conditioner control panels in a one-to-one corresponding mode, each communication base station is mounted on one lighting equipment, and a local area network is formed by each communication base station, at least one data processing equipment and at least one air conditioning control panel, wherein the data processing equipment is connected with the air conditioning control panel in a corresponding mode. The air conditioning controlling system is used for controlling air conditioners.

The invention discloses an insect antifeedant 15beta-hydroxyklaineanone conducted in plants and application. The 15beta-hydroxyklaineanone has antifeeding activity on various insects and can be conducted in the plants; the antifeeding effect is better than that of the antifeedant applied to the surfaces of the plants; the 15beta-hydroxyklaineanone can be used for preparing a systemic insect antifeedant, is more convenient to use, is not influenced by interferences of an external environment and has a good application prospect; the insect antifeedant is separated and purified from natural plants and has low toxicity, no residues, no pollution and no nuisance on economic crops including various grains, melons and vegetables; a series of problems produced by the drug resistance caused by traditional insecticide in the prior art can be solved.

The invention relates to an online detection method of a grounding resistor. The voltage and the current of the grounding resistor to be measured are measured through an auxiliary electrode embedded system, and the measured voltage signal and the measured current signal are transmitted to a measuring system, wherein the auxiliary electrode embedded system is of a sealed structure. Data processing is performed on the received voltage signal and the received current signal through the measuring system. The resistance value of the grounding resistor is obtained, and the measured resistance value of the grounding resistor is locally displayed or transmitted to a master station management control system. The resistance value of the grounding resistor is displayed and managed by the master station management control system. The online detection method of the grounding resistor effectively solves the problem existing in measurement of grounding resistors in the prior art, achieves efficient and real-time online measurement of grounding resistors, is not limited by the site or influenced by environmental interference, greatly improves the measuring accuracy, greatly reduces manual error, is favorable for finding out problems as soon as possible to take measures in time for maintenance, and thus guarantees safe operation of relevant lightning protection system equipment and the like.

The invention relates to an electronic non-contact bidirectional rotary intelligent wiper motor (called NIM for short) based on a current international and domestic universal mechanical contact motor. The wiper motor overcomes the shortcomings that the mechanical contact motor is cumbersome in structure, short in service life, high in failure rate, unstable in quality, difficult to mount and the like for a long time, interferential radiation cannot be generated when the wiper motor runs, other electronic devices in an automobile are protected from interference, and a structure of a transmission assembly in a wiper assembly is particularly omitted, so that the wiper assembly is simpler in structure and lower in use cost. The wiper motor fills up international and domestic gaps of the field of an automobile wiper motor industry.

The invention provides a multifunctional environment simulation test device capable of real-time observation, and the device comprises a box body which is internally provided with a space for accommodating a sample, one side of the box body is provided with a box door which can open or seal the space, and the top of the box body is provided with a transparent observation window; the device furthercomprises a controller arranged in the box body; sensors which are arranged in the box body, are electrically connected with the controller and at least comprise a temperature sensor, a humidity sensor and a sulfur dioxide concentration sensor; actuators which are arranged in the box body and are electrically connected with the controller; and a control panel which is electrically connected withthe controller and is used for inputting parameter values; the controller controls the actuators such that the values monitored by the sensors are equal to the input corresponding parameter values. Therefore, a plurality of adjustable and controllable parameters can be set, the weathering test of grotto cultural relics under the multi-factor coupling effect is realized, the closed space can ensurethat the test is not influenced by external interference, and meanwhile, the process can be observed in real time through the observation window.

The invention discloses an expanding defoaming and dredging dry-type evaporator for a water cooled centrifuge unit. The dry-type evaporator comprises a grooved drum shell, an exhaust duct, air coolingboxes, a water cooled spray pipe, an aluminium plate heat exchange tank, a drainage pipeline and an outer propeller rotating disk; the exhaust duct and the drainage pipeline are welded with the upperand lower sides of the middle section of the grooved drum shell separately, and interpenetrate with each other; and the two air cooling boxes are provided, and installed at the right and left top corners of the water cooled spray pipe separately. According to the dry-type evaporator, through cooperative application between the outer propeller rotating disk and a fluidized bed plate, the outer propeller rotating disk is pushed by air pressure of a blower to rotate, so that a brush rotating frame is rotated on a film in an external expansion manner for brushing away steam foam; then, the foam is removed under the internal and external centrifugal air pressure of a concave corrugated groove and diaphragm blades; when the foam attaches to the fluidized bed plate, the foam is discharged with water flow, while air force is recoiled upwards for taking away hot air; and the effects of foam dredging and exhaust as well as up-and-down cyclone gas-liquid separation are achieved, and the functionof covering and removing the foam in the evaporator in a self-propelled pneumatic external expansion manner is achieved.