55results about How to "Improve anti-interference" patented technology

An embodiment of the invention provides an antenna array and an antenna device. The antenna array comprises at least two transmitting unit sub-arrays; the two adjacent transmitting unit sub-arrays are arranged in parallel; each transmitting unit sub-array comprises a plurality of high-frequency vibrators and at least two low-frequency vibrators; the high-frequency vibrators in the two adjacent transmitting unit sub-arrays are arranged in a staggered way; and the low-frequency vibrators in the two adjacent transmitting unit sub-arrays are arranged in the shape like a triangular mesh. The antenna device employing the antenna array further comprises a reflecting plate. According to the antenna array and the antenna device disclosed by the invention, interference between the high-frequency vibrators is reduced by increase of the distance between the high-frequency vibrators in the two adjacent columns of transmitting unit sub-arrays, consequently, the performance of an antenna is improved greatly.

The invention provides a self-tuning expert control method of a burning trough point parameter based on working condition recognition, comprising the following steps of: firstly, data collection and fuzzification: collecting and calculating a mixture level, the change rate thereof, a deviation of a burning trough point position, burning trough point temperature, the change rate of a 17-19 air box temperature average value and 6 process variables of sintering waste gas temperature rising point position, and carrying out fuzzification treatment; secondly, fuzzy diagnosis: obtaining the working condition of a current sintering running state according to the 6 fuzzed process variables and based on a diagnosis rule; thirdly, online control: according to the working condition obtained in the fuzzy diagnosis step and based on an established expert rule, realizing automatic control of the burning trough point by online regulating a control period, a control step size as well as an upper limit value and a lower limit value of a sintering machine speed. The invention can efficiently inhibit the phenomenon of unsmooth sintering process caused by instable working condition and enhance the yield and the quality of sintered ores.

The invention discloses a voltage and current switchable type electric leakage protection device. The voltage and current switchable type electric leakage protection device comprises a release, a rectifier diode, a silicon controlled rectifier, an indicator light circuit, a voltage reduction circuit, a first amplification circuit, a zero sequence current transformer, a test circuit, a second amplification circuit and an overtemperature detection circuit, wherein the second amplification circuit is further provided with a ground wire current transformer and a ground wire voltage detection circuit. The novel voltage and current switchable type electric leakage protection device can shut off power supply under the conditions that the load end is zero, a phase line has electric leakage and a power supply socket ground wire is charged.

The microwave sensor based on the differential substrate integrated waveguide reentry resonant cavity and the microfluidic technology is provided with an upper cover plate and a lower bottom plate which are overlapped, and each of the upper cover plate and the lower bottom plate comprises a top metal layer, an intermediate dielectric layer and a bottom metal layer; wherein two resonant cavity monomers are formed between the upper layer cover plate and the lower layer bottom plate side by side left and right, a microfluidic chip is embedded in each resonant cavity monomer, and the two substrateintegrated waveguide reentry resonant cavity monomers are connected in parallel and are connected in series through a power divider. According to the invention, the microfluidic chip is embedded intothe substrate integrated waveguide reentry resonant cavity based on the differential structure configuration. By utilizing the advantages of compensation of a differential structure on environmentalinterference, high concentration of a reentry resonant cavity electric field and accurate control of trace fluid by a micro-fluidic chip, the high-sensitivity high-precision sensor which is less interfered, non-invasive and easy to integrate with other planar circuits is obtained.

The invention discloses a near-earth orbit determining method based on atmospheric drag acceleration measurement, comprising the following steps: 1, carrying out preparation work; 2, measuring atmospheric drag acceleration; 3, carrying out non-conservative acceleration vector unitization; 4, giving orbit determination initial value; 5, constructing an orbit determination equation; and 6, solving the orbit determination equation. Through the steps, a triaxial accelerometer and a star sensor loaded on a spacecraft are used for acquiring the non-conservative force accelerated speed suffered by the spacecraft during in-orbit operation and the coordinate transformation matrix of a spacecraft body relative to a geocentric inertial coordinate, an orbit determination iteration computation initialvalue is acquired under the circular orbit assumption, the non-conservative force acceleration is corrected by utilizing atmospheric to acquire rotation term speed unit vector, the orbit equation is constructed and is solved by utilizing an orbit predictor and a numerical method, so that high-precision orbit determination is realized. The method can be independently used on the spacecraft, and isnot disturbed by the electromagnetic environment, is low cost and easy to achieve and can be widely applied to low earth orbit spacecraft.

The invention relates to a binocular vision and laterally mounted video camera-based passenger flow counting method. The method comprises the following steps of: (1) acquiring left and right synchronous video image sequences by using left and right parallel and synchronous video cameras; pre-setting two mutually parallel rows of counting lines which are vertical to the walking direction in a video image picture; and pre-setting a parallax error on the two rows of the counting lines as a background parallax error; (2) calculating the parallax errors point by point on the dual-row counting lines; then respectively unfolding the two rows of parallax errors on a time axis to form double rows of parallax error time space diagrams; (3) extracting a foreground target based on the differential value between the parallax error of one counting line and the background parallax error so as to generate a dynamic parallax error time space diagram; (4) performing planar mapping on the foreground target to obtain the mapped image of the corresponding planar position, the grey of the mapped image corresponding to the height of the foreground target; (5) performing the region division, marking, matching and counting on the foreground target in the mapped image; and (6) repeating the steps (1) to (5) until the real-time passenger flow counting is finished. The method is suitable for the counting occasions, such as outdoor sidewalks, indoor gates with over-high roof and corridors, where the video cameras can only be mounted laterally; and the method has very high real-time performance and robustness.

The invention discloses a fiber laser single-wave self-mixing interference displacement measuring system, and belongs to the technical field of optical measuring. The system comprises a pumping source, a laser device, five optical fiber gratings, three optical fiber isolators, two detectors, an Er-doped fiber, piezoelectric ceramic, a 3dB coupler, a circulator, a collimating mirror, a wavelength division multiplexer, a variable optical attenuator, a signal processing circuit, a feedback control circuit, an A/D (analog to digital) conversion card, a computer and result output. A pair of optical fiber gratings with the same reflection wavelength is used as a laser resonator mirror to generate single-wavelength laser; the single-wavelength laser is projected to a measured object surface, reflected or scattered back to a laser cavity through a measured object to generate self-mixing interference with light in the cavity, so that displacement measuring with nano-scale resolution is realized. The system can measure a low-reflectivity object due to an amplifying effect of a gain medium in the laser cavity; output wavelength of the laser device is stabilized through feedback control, so that the measuring precision is greatly improved; the fiber laser device is not only a sensor, but also an interferometer, is simple in structure and easy to carry.

The invention provides an underground staff tracking and managing system. The underground staff tracking and managing system is characterized by comprising radio frequency identification device (RFID) electronic identification cards and RFID card readers, wherein the RFID electronic identification cards are assigned to underground staff and underground equipment; the RFID card readers are distributed in all underground tunnels and are used for reading the information of the RFID electronic identification cards through antennas; all the RFID card readers positioned in the same tunnel are connected with substation equipment for acquiring data; the substation equipment is connected with a monitoring center through communication cables; and the monitoring center accesses to Internet through a switchboard so as to communicate with equipment which accesses to the Internet. The underground staff tracking system can be used for accurately positioning the underground staff by an RFID technology and has the following advantages of full automation, long effective work distance, high speed and stable performance.

The invention discloses an efficient passive time division TDOA positioning method for eliminating clock frequency difference, In the positioning process, the label node only receives the positioningsignal and does not need to send the positioning signal to the anchor node to complete the positioning. In this positioning mode, no matter how many label nodes there are in the positioning area, thepositioning of each label node can be completed, which greatly improves the system capacity and reliability. Anchor node clock synchronization does not require additional synchronization network, which greatly improves the system efficiency and reduces the cost; And by arranging N (N) 1 anchor nodes in one region, from the point of view of arrangement and combination, Maximum range differences canbe obtained in one positioning cycle. The larger N is, the more range differences the label nodes get and the higher positioning accuracy is.

The invention discloses a variable-step LMS (Least Mean Square) adaptive harmonic detection method applied to an APF (Active Power Filter). According to the method, on the basis of the existing MVSS-LMS algorithm, forgetting weight and estimation of a historical error are added, step updating is controlled, a step updating range is controlled dynamically, and gliding window forgetting weight is adopted to reduce computation complexity. Compared with the traditional adaptive harmonic detection algorithm, the method of the invention is simple in computation, the dynamic response speed is fast, steady-state errors are reduced in an APF low signal-to-noise ratio environment, the anti-interference ability is high, and harmonic current detection effects are good. The method can be effective in application situations of a single-phase system and a three-phase system.

The invention relates to a scanning configuration of a two-dimensional capacitance sensor and a positioning method. The scanning configuration has a single layer of electrode groups arranged on one side, wherein each electrode group comprises two touch electrodes, namely a positive touch electrode and a negative touch electrode; and during scanning, one touch electrode in each electrode group serves as a scanning end, and the other touch electrode serves as a reference end. The invention has the advantages that: the scanning configuration and the positioning method are simple; interference caused by outside noises can be effectively prevented; and interference resistance is improved, so coordinates of specific positions of touch points can be quickly and accurately found.

The invention discloses a rail transit Internet-of-Things node control system. The system comprises a signal sampling module and a comparison detection module, the signal sampling module samples output signals of the rail transit Internet-of-Things node; an output port of the signal sampling module is connected with an input port of the comparison detection module; and signals are abnormal due tonode faults of the Internet of Things. At the moment, the operational amplifier AR3 outputs a high-level signal; meanwhile, an operational amplifier AR3 and capacitors C7-C9 are used for reducing thenoise of the signal, the signal accuracy is ensured, finally, peak signals in the signals are screened by using a peak detection circuit consisting of an operational amplifier AR5, a diode D7 and a diode D8,and the peak signal is used for triggering the signal emitter E1 to work; in order to further improve the precision of the trigger signal, the silicon controlled rectifier D9 is used for detecting the potentials of the inverting input ends of the operational amplifier AR2 and the operational amplifier AR3, the trigger signal of the signal emitter E1 is finely adjusted, and the rail transitInternet-of-Things node control system terminal receives the Internet-of-Things node information in time and responds in time.

The invention relates to a parking space state detection method and system, a readable storage medium and computer equipment. The method includes the steps of acquiring image data of a parking space to be detected; extracting a feature vector of an image to be detected from the image data of the parking space to be detected; performing parking place state detection according to the feature vectorof the image to be detected and a preset neural network detection model; acquiring and pushing a parking place state detection result. According to the scheme, the feature vector of the image to be detected is extracted from the image data of the parking space to be detected, and the feature vector of the image to be detected is input into the preset neural network detection model to detect the parking space state, so that the interference resistance of parking space state detection is effectively improved, and the accuracy rate of the parking place state detection is increased.

The invention discloses a target tracking method based on a YOLOv3 algorithm and a DSST algorithm. The method comprises the following steps: training a target detection model, inputting an image, evaluating a position, detecting a target, taking a position model, a scale model, a target position and a target scale as inputs in the step 3) when a next frame of image comes, and repeating the steps 3) to 4) to complete a video target tracking function. The method is beneficial to fully verifying and objectively evaluating the composition factor influence of the overall effect of the method in twostages of the implementation process, and is also convenient to clarify the improvement and reinforcement targets of the target tracking method. The operation amount of a detection algorithm is effectively reduced, so that the operation speed is increased and the hardware requirement is reduced. The anti-interference performance of the tracking algorithm can be improved, and the success rate andreal-time performance of the tracking algorithm are further improved.

The invention discloses an agricultural greenhouse data transmission system. The agricultural greenhouse data transmission system comprises a frequency acquisition circuit, a separation feedback circuit and a push-pull voltage stabilizing circuit. The frequency acquisition circuit acquires analog signal frequency output by the signal transmission module and received by the controller; according tothe separation feedback circuit, a capacitor C6, a capacitor C7 and a triode Q1 form a separation circuit to divide a signal into two paths of signals with the same frequency and different amplitudes; in one path, an operational amplifier AR1, a diode D1, a diode D2 and a capacitor C8 are used for forming a noise reduction circuit to reduce the signal-to-noise ratio; in the second path, an operational amplifier AR2, an operational amplifier AR3, a capacitor C4 and a capacitor C5 form a filter circuit to filter disturbance signals; finally, the push-pull voltage stabilizing circuit uses a triode Q4 and a triode Q5 to form a push-pull circuit to prevent signal crossover distortion, the signals are output after being stabilized by a voltage stabilizing tube D3, the signals in the signal transmission channel for the control terminal in the agricultural greenhouse data transmission system are detected in real time, the signals can be automatically calibrated, and signal distortion is prevented.

The invention discloses an infrared alcohol detection system.The infrared alcohol detection system comprises a microprocessor, a driving circuit, an infrared sensing system, an amplifying circuit and an A/D switching circuit.The microprocessor, the driving circuit, the infrared sensing system, the amplifying circuit and the A/D switching circuit are connected in sequence.The A/D switching circuit is connected with the microprocessor.The infrared sensing system is a dual-channel infrared sensing system.The infrared alcohol detection system has the advantages that due to the design of the infrared sensing system, detection data can have the high disturbance resistance; a wireless transmission module and a background terminal server are cooperated for use, on the one hand, data can be synchronously transmitted in real time, and data accumulation is effectively avoided; on the other hand, an operator can perform real-time checking; the using safety and reliability of the system are improved through a fingerprint recognizer.

The invention discloses an EEG-based meditation detection method, relating to the field of EEG signal emotion feature extraction and analysis. The method includes the steps of acquiring a section of EEG time domain signal data and converting the data into EEG frequency domain signal data; respectively calculating the energy absolute value of the alpha frequency range and the energy absolute value of the beta frequency range based on the EEG frequency domain signal data; calculating the energy relative value ratio of the alpha frequency range based on the energy absolute value of the alpha frequency range and the energy absolute value of the beta frequency range; and calculating the meditation score MedScore based on ratio. According to the invention, the interference immunity of meditation determination is enhanced, and the accuracy of meditation determination result is improved.

The invention relates to an FPGA (Field Programmable Gata Array) based high-cycle fatigue testing machine controller. The FPGA based high-cycle fatigue testing machine controller comprises an FPGA central processing module; the FPGA central processing module is connected with an AD (Analogue-Digital) collection module, a DA (Digital-Analogue) module, a PWM (Pulse Width Modulation) module, a photoelectric coding pulse counting module, a serial port module, an Ethernet communication module, a storage module and a power source module. The FPGA high-cycle fatigue testing machine controller has the advantages completely improving the controller system performance, improving the integral working efficiency, the control accuracy and the electrical system reliability and being convenient to operate and advanced in technology due to combination of the FPGA technology and the personal computer technology based on a traditional testing machine controller.

The invention provides an antenna board. The antenna board comprises a grounded first metal plate, a PCB configured to receive and transmit antenna signals and a grounded second metal plate, and the PCB is located between the first metal plate and the second metal layer; the second metal plate is provided with a hollow groove, and the PCB is located beside the hollow groove. The first metal plateand the second metal plate are grounded to form a shielding layer to receive and transmit the signals of the PCB only through the hollow groove, and therefore, loss is reduced, and the anti-interference performance of the antenna plate is improved.

The invention discloses an intelligent self-diagnosis digital input terminal board and a method. The terminal board comprises an external equipment input signal wiring terminal XS1, a power module EM, a D-type socket XS2, and a first input channel CM0, a first intelligent diagnosis module DM0, a second input channel CM1, a second intelligent diagnosis module DM 1, a third input channel CM2, a third intelligent diagnosis module DM2, a fourth input channel CM3, a fourth intelligent diagnosis module DM3, ..., one by one until a sixteenth input channel CM15 and a sixteenth intelligent diagnosis module DM15 which are connected with the external equipment input signal wiring terminal XS1. The invention also discloses a terminal board intelligent self-diagnosis method. The terminal board is simple in structure, employs sixteen mutually independent input channels, can carry out real-time diagnosis and alarm on on-off of a circuit connected with external equipment and has high safety and reliability.

A regulation knob of light axle in sighting device consists of external cover, regulation base, hand wheel and regulation screw. It is featured as regulating said regulation screw by external cover through regulation base, setting the first washer between said cover and said base and connection element between said cover and said base for regulating tightness of contact surface between the first washer and said regulation base.

The invention discloses a method for controlling cursor movement by a remote controller. The method comprises the following steps of: acquiring an original image of an indicating light source on a control terminal through a camera on the remote controller, acquiring original position coordinates of the indicating light source; controlling movement of the remote controller, acquiring current position coordinates of the cursor through a current image of the indicating light source obtained by the camera; and controlling movement of the cursor according to the current position coordinates of the cursor. The invention further discloses a device for controlling cursor movement by the remote controller. The method and the device of the invention realize beneficial effect of controlling the mouse cursor conveniently and quickly on a smart television screen, increase the interference resistance of cursor movement controlled by the remote controller, improve the sensitivity of cursor movement controlled by the remote controller, and improve comfort and pleasure of users greatly while the users use the device through perfecting host software of a television and coordinating with a traditional remote controller equipped with a camera without affecting uses of traditional functions of the remote controller.

The invention provides a large object plane X-ray stripe image converter tube comprising an insulation jacket and a metal sleeve connected to each other. The insulation jacket is made of insulating material. The environment in the insulation jacket and the metal sleeve is vacuum. A cathode, a gate, a focusing electrode assembly and an anode are arranged inside the insulation jacket. The metal sleeve is arranged outside the tail of the anode. A fluorescent screen for receiving electron beams and imaging is arranged on an end part of the metal sleeve. The focusing electrode assembly comprises a plurality of focusing electrodes. The gate, the plurality of focusing electrodes and the anode generate a quasi concentric spherical electrostatic lens structure through fitting. The invention provides the large object plane X-ray stripe image converter tube with good shielding ability, strong anti-interference ability, little influence of curvature of field, and large cathode working area.

The invention provides a driving circuit of a low-side NMOS (N-channel Metal Oxide Semiconductor), which is characterized in that a driving discharging module and a driving charging module are combined, the grid current of the low-side NMOS is dynamically adjusted according to a switching control signal of the low-side NMOS and a switching stage of the low-side NMOS, so that the low-side NMOS is charged or discharged at a preset current when being in a non-Miller platform stage. Therefore, the low-side NMOS is driven at low resistance, the switching delay is reduced, and the anti-interference performance of the low-side NMOS is improved.

The invention relates to an open type spectrometer receiving channel extension system. Real-time buses are divided into a downlink real-time bus and an uplink real-time bus, the receiving control portion of the downlink real-time bus serves as an external extension receiving signal real-time bus and is matched with other signal extension to complete receiving channel extension, and 2-4 spectrometers are combined to achieve extension of channels from 32 to 64 or even more. The open type spectrometer receiving channel extension system can achieve extension without extra control of an upper computer, and is low in cost, low in use difficulty and good in synchronous effect.

The embodiment of the invention discloses a Bluetooth connection method and device and Bluetooth equipment. The method comprises the following steps: sending a clock sequence and a group code, instructing a slave device to carry out frequency hopping in a channel group corresponding to the group code, and instructing the slave device to synchronize the clock sequence of the slave device accordingto the clock sequence, the group code being a code corresponding to a first preset number of channel groups divided by a Bluetooth channel according to a preset rule, and being used for instructing the Bluetooth device to carry out frequency hopping in the corresponding channel group; and receiving connection response information of the slave device, and determining a Bluetooth connection state according to the connection response information, the connection response information being jointly determined based on a clock sequence matching result of the slave device and a group code matching result. According to the embodiment of the invention, a master device to establish the Bluetooth connection sends the clock sequence and the group code to the slave device to instruct the slave device toperform synchronous frequency hopping in the corresponding channel group, so that the anti-interference performance of the Bluetooth equipment is enhanced, and the interference avoidance in the Bluetooth connection process is realized.

The invention discloses a capacitive flexible tensile sensor based on an S-shaped micro-pore channel liquid metal composite dielectric layer, and belongs to the field of flexible tensile strain sensors. The S-shaped micro-pore channel liquid metal composite dielectric layer is formed by arranging an S-shaped micro-pore channel cavity in a rectangular flexible substrate and injecting liquid metal into the S-shaped micro-pore channel cavity, and a flexible electrode and a flexible packaging layer are sequentially arranged on the upper surface and the lower surface of the S-shaped micro-pore channel liquid metal composite dielectric layer. The S-shaped micro-channel liquid metal composite dielectric layer uses a silicone rubber substrate as an elastic substrate, uses liquid metal as a liquid-phase filler to fill the S-shaped micro-channels, and the cavities are distributed in the elastic substrate in an S shape. According to the capacitive flexible stretching sensor, a bionic structure similar to plant rhizomes is adopted, the capacitive flexible tensile sensor has the characteristics of good ductility, high sensitivity and low delay, and a feasible scheme is provided for designing the high-sensitivity capacitive flexible tensile strain sensor meeting the requirements of the application fields of human body posture monitoring, human-computer interaction, human physiological signalmonitoring and the like.

The invention discloses an anti-interference device for computer communication equipment, and relates to the technical field of computer communication. The device comprises a box body, a signal processor and communication equipment, a box door is arranged at the front end of the box body; a handle is arranged at the right part of the box door; fixing pieces are arranged at the four corners of therear end of the box. An air inlet net is arranged on the upper portion of the left side wall of the box, an air outlet net is arranged on the lower portion of the right side wall of the box, a fan isarranged on the right portion of the lower side in the box, an antenna is arranged on the upper portion of the right side wall of the box, a first fixing frame is arranged on the upper portion in thebox, and a communication device is arranged at the upper end of the second fixing frame. According to the invention, the box body adopts a copper wire layer and iron wire layer anti-interference structure, and the positive and negative charge generator can form a shielding magnetic field, thereby facilitating the improvement of the anti-interference performance. Through the filtering of the filterand the further optimization of the signal processor, the signal receiving precision and the signal quality can be improved.

The invention discloses a low-noise pre-amplifier. The low-noise pre-amplifier comprises a power supply, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first N-channel field-effect transistor, a second N-channel field-effect transistor, an integrated operational amplifier, a low-pass filter composed of the eleventh resistor, the eighth capacitor, the ninth capacitor and the tenth resistor and a differential amplifier composed of the first N-channel field-effect transistor and the second N-channel field-effect transistor. The low-noise pre-amplifier is provided with the low-pass filter composed of the eleventh resistor, the eighth capacitor, the ninth capacitor and the tenth resistor, so high-frequency signals among acoustical signals can be filtered out; moreover, the high-quality low-noise N-channel field-effect transistors are selected for the pre-amplifier, so that the anti-interference performance of the pre-amplifier is improved.

The invention discloses a laser resistor trimming machine control device which comprises a CPU circuit, an address decoding and logic control signal generation circuit, a state and interrupt register circuit, a serial interface and parallel interface circuit, and an external EST data bus; the CPU circuit is respectively connected with the address decoding and logic control signal generation circuit, the state and interrupt register circuit, and the external EST data bus; the serial interface and parallel interface circuit is connected with the CPU circuit; the state and interrupt register circuit is connected with the external EST data bus. The laser resistor trimming machine control device disclosed by the invention can control a laser resistor trimming machine through a separate hardware circuit, and operation and control can be performed without the occupation of a CPU of a PC machine; and thus the working efficiency and stability of the laser resistor trimming machine are improved.