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260 results about "Dual sensor" patented technology

Container liquid level measuring method, system and equipment of pressure sensor and medium

The invention relates to the technical field of industrial automation control, in particular to a container liquid level measurement method, system and equipment of a pressure sensor and a medium, and provides a method for eliminating gas phase pressure influence based on a double-sensor differential measurement mechanism and dynamically correcting liquid density and sensor drift errors in combination with a temperature compensation model. The temperature data are linked in real time through a three-dimensional compensation function, density calculation and drift correction are synchronously adjusted, and multi-parameter dynamic decoupling and self-adaptive compensation are achieved; a collaborative measurement mechanism is adopted to integrate bottom and top sensor data, and a built-in temperature probe and a preset threshold are combined to complete multi-source signal fusion and compensation calculation; a dynamic calibration method is designed, and system errors are eliminated through reference pressure point calibration and structure coefficient correction; constructing a closed-loop signal processing flow, and integrating high-precision analog-to-digital conversion, digital filtering and real-time algorithm to output a compensated liquid level value; the method improves the measurement precision and stability, and is suitable for temperature change, gas phase pressure fluctuation and multi-medium scenes.
Owner:HUANENG POWER INT INC JINGGANGSHAN POWER PLANT

Permanent magnet synchronous motor control system and control method for electrically-driven hydraulic source

The invention relates to the technical field of motor control, and discloses a permanent magnet synchronous motor control system and method for an electric drive hydraulic source, and the system comprises a data collection module which is used for collecting the state parameters of the electric drive hydraulic source and the operation data of a permanent magnet synchronous motor in real time through multiple sensors; the sensor redundancy and fault-tolerant module is used for performing parallel sampling through hardware dual-redundancy configuration and dual sensors; the self-adaptive fuzzy logic control module is used for dynamically adjusting a rotating speed instruction and a torque instruction of the permanent magnet synchronous motor based on the collected state parameters; a data driving optimization module; and a digital twinning prediction maintenance module. A self-adaptive fuzzy logic control module is used for dynamically generating a motor rotating speed and torque instruction based on parameters such as real-time pressure, flow deviation and change rate, a fuzzy logic algorithm is used for processing a nonlinear time-varying load and quick response, a self-adaptive fuzzy logic control rule weight and a power conversion circuit parameter are optimized through a reinforcement learning algorithm, and the control precision is improved. And dynamic self-optimization of permanent magnet synchronous motor control is realized.
Owner:JINAN BOER POWER EQUIP CO LTD

Dual sensor wafer temperature measurement system

An apparatus may include: (a) a processing chamber including chamber walls and a chamber heater; and (b) a pedestal positioned within the chamber interior and including: (i) a substrate heater having a plurality of light emitting diodes (LEDs), (ii) a window positioned above the substrate heater comprising a material transparent to light from the LEDs, (iii) three or more substrate support pads configured to support a substrate such that the window and the substrate are offset by a nonzero distance; and (iv) a temperature sensor comprising a first detector configured to measure thermal radiation emitted by the substrate, and a second detector configured to measure light transmitted through the substrate.
Owner:LAM RES CORP

Automatic processing method for real-time observation data of ocean station

The invention provides an automatic processing method for real-time observation data of an ocean station, and belongs to the technical field of ocean observation data processing. A wavelet packet decomposition multi-scale noise separation algorithm is established to distinguish environmental noise and real signals, dual-sensor redundancy configuration is combined with Bayesian inference to identify sensor drift, and a calibration coefficient is updated in real time through a recursive least square method. A one-dimensional time sequence is mapped to a high-dimensional phase space by utilizing a phase space reconstruction algorithm to realize high-precision prediction of a chaotic signal, a hierarchical data storage architecture is established, and a data migration strategy is iteratively optimized through a hierarchical correlation degree function; the technical problem that time synchronization signals are difficult to reconstruct accurately according to asynchronous sampling data of multiple sensors of an ocean station is solved.
Owner:STATE OCEANIC ADMINISTRATION EAST CHINA SEA INFORMATION CENTER (STATE OCEANIC ADMINISTRATION EAST CHINA SEA ARCHIVES)

Bulk material weighing method, system and equipment based on double sensors

The invention provides a bulk material weighing method, system and device based on double sensors, and relates to the technical field of electronic scale verification, and the method comprises the steps: weighing a bulk material through double sensors, and obtaining an original weight signal corresponding to each sensor in the double sensors; performing preprocessing and scene filtering on each original weight signal to obtain effective weight data of each sensor on the bulk material; mutual correction analysis is carried out based on each effective weight data, and the data deviation state of the double sensors is judged; and according to the data deviation state, the final weight value of the bulk material is determined. According to the method, the problems of time difference, noise, sensor drifting and the like are effectively eliminated through the technical means of preprocessing, scene filtering, mutual correction analysis and the like, meanwhile, the consistency and the accuracy of data of the double sensors are ensured through mutual correction analysis, and finally, the precision and the stability of bulk material weighing are remarkably improved through comprehensive analysis and optimization processing.
Owner:宁波佩萨莫伦称重系统有限公司

Multi-channel verification redundant corner torque sensor and degradation measurement method thereof

The sensor comprises two Hall type steering wheel angle sensors which are coaxially installed at a steering wheel transmission shaft, the models of the two Hall type steering wheel angle sensors are consistent, and the two Hall type steering wheel angle sensors are independently connected to a data processing module. When torque generated after the steering wheel is stressed acts on the steering wheel transmission shaft (1), a tubular column of the steering wheel transmission shaft deforms, rotation angles of deformation in different areas in the axial direction are different, and the two Hall type steering wheel angle sensors detect the tubular column rotation angles in the installation areas of the Hall type steering wheel angle sensors respectively and output the tubular column rotation angles to the data processing module. The data processing module calculates the torque borne by the steering wheel according to the angular deviation of the tubular column rotation angle measured by the two Hall type steering wheel angle sensors. Through cooperative work of the two sensors, the torque measuring function can be achieved, and the redundancy safety performance of the system can be improved.
Owner:FUZHOU UNIV

Calibration and setup for a machine guidance system

A system and method for calibrating and setting up a machine guidance system for construction assets, such as loaders or excavators, employ point cloud data from onboard optical sensors to acquire spatial measurements. Point cloud data is transformed to an asset coordinate frame, candidate pitch and roll offset values are applied, grid representations are generated, and calibration values are selected with reduced error by comparing these grids to a reference surface. The system and method support autonomous operations including obstacle avoidance and grading by modifying the point cloud data according to the determined calibration values. In addition, dual-sensor calibration, terrain mapping, and filtering techniques are disclosed.
Owner:EQUIPMENTSHARE COM INC

Photovoltaic connector with limiting assembly

The invention discloses a photovoltaic connector with a limiting assembly, and belongs to the technical field of photovoltaic equipment connection, the photovoltaic connector comprises a plug assembly, a socket assembly and the limiting assembly, and the plug assembly is connected with the socket assembly through the limiting assembly. Through cooperation of multiple components, traditional bottlenecks are broken through, double gradient sealing is achieved, rainwater and dust are blocked, the problems of short circuit and corrosion caused by failure of traditional single sealing are solved, and long-term stable outdoor operation of the connector is guaranteed; meanwhile, SMA composite limiting is arranged, the limiting force of 50-80 N can be kept within the range of-40 DEG C to 85 DEG C, and insertion loosening caused by embrittlement of a traditional buckle and creep deformation of a common spring is avoided; the double sensors are integrated, signals are integrated through the miniature PCB and transmitted to the controller or the terminal, faults are early warned in real time, power generation loss caused by fault delay is reduced, and maintenance cost is reduced.
Owner:DONGGUAN LIANDA PRECISION PROD CO LTD

Method for tracing root cause of suction event based on dual sensors and catheter pump system

PCT designated stageWO2026016973A1Evaluation of blood vesselsSensorsIntraventricular pressureCatheter
Disclosed in the present application is a catheter pump system. A measured intraventricular pressure and a measured intravascular pressure are measured by means of dual sensors, respectively, and an estimated intraventricular pressure is calculated by using the measured intravascular pressure, a motor current, and a motor rotation speed. When it is determined that a suction event occurs in a pump assembly by using at least one of the estimated intraventricular pressure, the measured intravascular pressure, and the motor current, the root cause of the suction event is further determined by using the positive or negative characteristics of the measured intraventricular pressure.
Owner:LIFE SHIELD MEDICAL TECH (SUZHOU) CO LTD

Electric pole burial depth nondestructive measurement method, system, equipment and medium

The invention relates to the technical field of electric pole burial depth measurement, in particular to an electric pole burial depth nondestructive measurement method, system, equipment and medium, and the method comprises the steps: coaxially installing a first sensor and a second sensor on the side wall of an electric pole at a preset interval along the axial direction of the electric pole; impact excitation is applied to the side wall of the electric pole, vibration signals of the first sensor and the second sensor are synchronously collected, and a dual-channel time domain signal is obtained; calculating the wave velocity of the elastic wave in the current electric pole according to the arrival time difference of the head wave in the dual-channel time domain signal and a preset interval; based on the calculated wave velocity and the dual-channel time domain signal, performing signal processing and statistical analysis on a plurality of samples obtained by multiple times of measurement so as to identify the arrival time difference corresponding to the stable uplink reflected wave; and calculating the burial depth of the electric pole according to the identified arrival time difference and wave velocity of the uplink reflected wave. The method has the beneficial effects that the risk of high-altitude operation is thoroughly avoided through double-sensor side wall installation and intelligent algorithm decoupling.
Owner:GUIZHOU POWER GRID CO LTD

Automatic fluorine and nitrogen mixing device for octafluoropropane processing

The invention belongs to the technical field of chemical engineering devices, particularly relates to an automatic fluorine and nitrogen mixing device for octafluoropropane processing, and provides the following scheme aiming at the problems that a joint with a larger joint is difficult to stably monitor in real time, a leakage buffer mechanism is lacked when leakage occurs, and gas can quickly diffuse and enter a working environment without obstruction. Comprising a support; the mixing tank is fixedly connected to the supporting frame; the pressure regulating valve is positioned below the mixing tank, and the pressure regulating valve is communicated with the discharge hole of the mixing tank; and a leakage detection module. According to the fluorine and nitrogen automatic mixing device for octafluoropropane processing, a liquid layer is formed at the large connecting position of a surface active agent solution coating connector, double leakage early warning is achieved in combination with a laser sensor and an electrochemical sensor, and meanwhile the gas leakage speed is slowed down through bubble wrapping; on the premise that the sealing detection reliability is guaranteed, time is bought for emergency disposal, and the operation safety is improved.
Owner:FUJIAN DEER TECH CORP

Brake-by-wire method and brake system under dual modes

The invention discloses a brake-by-wire method and a brake system in dual modes, and belongs to the field of automobile braking, the brake-by-wire method and the brake system in dual modes comprise a pedal assembly, a vehicle control unit electrically connected with the pedal assembly and a brake-by-wire module electrically connected with the vehicle control unit, and the brake-by-wire module adopts a redundant structure. The brake-by-wire module comprises a main line control brake unit and a redundant brake-by-wire unit, and the main line control brake unit and the redundant brake-by-wire unit are connected with the brake calipers through brake connectors. By the adoption of the brake-by-wire method and the brake system under the double modes, the reliability, the safety and the response accuracy of the brake-by-wire system are remarkably improved through redundant acquisition of the brake intention by the double sensors, backup of the double brake-by-wire units and intelligent switching of the flow channels by the brake connector, stable and efficient operation of the brake function under the complex working condition is ensured, and the brake efficiency is improved. Therefore, the method is suitable for a normal driving mode and an automatic driving mode.
Owner:GELUBO TECH CO LTD

Linear position micron dimension detection device based on orthogonal CCD (Charge Coupled Device) sensor and positioning method

The invention discloses a line position detection device based on an orthogonal CCD sensor and a positioning method. The device comprises an outer reference frame, an orthogonal CCD line target imaging module and a data acquisition and image processing unit. The orthogonal CCD line target imaging module comprises two orthogonally arranged CCD sensors, a short-distance large-wide-angle industrial camera and a calibration plate; the included angle between the optical axes of the two CCD sensors is 90 degrees, and data collection is controlled through the synchronous trigger switch. The CCD sensor realizes line target one-dimensional offset measurement under a high-precision calibration plate, realizes redundant observation of line target two-dimensional position quantity under the constraint of the orthogonal double CCD sensors and the distance between the calibration plates corresponding to the CCD sensor, and obtains a line position by using least square adjustment. According to the invention, the technical scheme of real-time calibration of the orthogonal CCD sensor and high-precision and high-reliability non-contact acquisition of the two-dimensional position of the linear target is adopted, and the problems of poor precision and low reliability of linear target measurement and extraction are solved.
Owner:UNIV OF SCI & TECH OF CHINA

Regional oximetry pod

A regional oximetry pod drives optical emitters on regional oximetry sensors and receives the corresponding detector signals in response. The sensor pod has a dual sensor connector configured to physically attach and electrically connect one or two regional oximetry sensors. The pod housing has a first housing end and a second housing end. The dual sensor connector is disposed proximate the first housing end. The housing at least partially encloses the dual sensor connector. A monitor connector is disposed proximate a second housing end. An analog board is disposed within the pod housing and is in communications with the dual sensor connector. A digital board is disposed within the pod housing in communications with the monitor connector.
Owner:MASIMO CORP

Soybean-corn intercropping nitrogen and phosphorus synergistic efficient utilization method based on rhizosphere signals

The invention discloses a soybean-corn intercropping nitrogen and phosphorus synergistic efficient utilization method based on rhizosphere signals, and relates to the technical field of microbial technology and agricultural engineering, a BX-pH dual sensor array is deployed in a root system intersection area, and the concentration and microscale pH change of benzoxazoline are monitored in real time; processing data by using two-stage feature transformation and a time sequence attention bidirectional GRU model, calculating a nitrogen-phosphorus disconnection coefficient and positioning risk coordinates; then, a buffer-antioxidant bifunctional nano-carrier is injected along the risk coordinates, neutralization acidification is carried out, and active oxygen is eliminated; after acidification and active oxygen signals are reduced to threshold values, DualFlow functional bacteria are inoculated at the same coordinate, and nutrition flow is recovered through phosphorus dissolution and nitrogen fixation synergistically; finally, a transport gene activation signal and nitrogen fixation intensity are continuously monitored through a BX-pH sensor array, and root zone water and proton outflow is adjusted in combination with variable-frequency pulse irrigation. Nitrogen and phosphorus utilization efficiency is remarkably improved, chemical fertilizer dependence is reduced, and crop yield and soil health are improved.
Owner:SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING +1

Multi-sensor fusion sleep monitoring method and system, equipment and storage medium

Through the multi-sensor fusion design of the microphone, the millimeter wave radar sensor and the piezoelectric film sensor, compared with an existing single or double-sensor sleep monitoring technology, the monitoring precision, the function dimension, the environmental adaptability and the like are remarkably improved. According to the method, a weighted voting decision fusion mechanism and an improved random forest model are adopted, and after a microphone acoustic monitoring dimension is newly added, the apnea detection sensitivity is improved; acoustic characteristics such as snore, breath sound rhythm, cough and dream can be accurately captured; health risk assessment dimensions are richer, preliminary screening of diseases such as sleep apnea syndrome and periodic limb dyskinesia can be realized, snore indexes and breathing stability are newly increased, and a multi-dimensional sleep quality report is provided for a user; in the whole process, an electrode plate or a wrist strap does not need to be worn, the three sensors all adopt non-intrusive design, no foreign body sensation exists after the piezoelectric film is embedded into the mattress, the problem of wearing discomfort of traditional monitoring is solved, and the user compliance is improved.
Owner:YIXING YUANCHUANG HEALTH IND TECH RES INST CO LTD +1

A packaging shell protection structure for a temperature sensor

The present invention discloses a packaging shell protection structure for a temperature sensor, which belongs to the field of sensor technology and includes a packaging shell. A dual PT temperature sensor and a PE vibration sensor are provided in the packaging shell. The packaging shell includes a probe end, a connection end, and a sensor conversion end. The probe end includes a probe temperature sensing cover, a central partition mounting member is provided in the probe temperature sensing cover, and a vibration test probe is provided at the end of the probe temperature sensing cover. The present invention completely avoids the problem of the vibration core squeezing the PT sensor lead in traditional assembly by fixing the PE integrated circuit board and the internal control column threading hole through a U-shaped card slot, significantly improving the product molding quality and long-term stability, increasing the electrical gap, and enhancing the insulation withstand voltage performance. Two sets of platinum resistance temperature sensing elements are used in conjunction with a temperature isolation chamber design. The sensors are quickly switched through a magnetic control system without waiting for temperature recovery, and the response speed is greatly improved. The dual sensor data are mutually calibrated to improve the temperature measurement accuracy and reliability.
Owner:SHENYANG XINGHUA HWA YICK RAIL-TRAFFIC-ELECTRICAL APPL

Middle chain scraper conveyor scraper defect and inclination fault detection device and method

The invention provides a medium-chain scraper conveyor scraper defect and inclination fault detection device and method.The device comprises a mounting base, a fault detection mechanism, a deflector rod, a mechanical travel switch and a controller, in the operation process of the scraper conveyor, a scraper drives a main swing arm to swing, and when the main swing arm swings, a rubidium magnet on the inner side of the main swing arm passes through a Hall proximity switch, the rubidium magnet is driven to rotate; the Hall proximity switches can send signals to the controller, and the controller judges whether the scraper is inclined or damaged or not according to the time interval of the received signals of the two Hall switches and gives an alarm. The device has the advantages that the Hall proximity switch and the mechanical stroke sensor are adopted for monitoring, detection of faults such as over-inclination of the scraper, damage to the two sides of the scraper or missing of the whole scraper can be achieved, on one hand, sensor redundancy can be achieved, monitoring accuracy can be improved, and the situation that monitoring fails due to sensor misoperation, vibration deviation and the like is prevented; on the other hand, the action characteristics and the service life characteristics of the two sensors can be fully utilized, the Hall proximity switch is long in service life, and the mechanical stroke sensor is high in anti-electromagnetic interference capacity.
Owner:中天合创能源有限责任公司

Silicon carbide power device junction temperature online accurate extraction method based on double-sensor Kalman filtering weighted average algorithm

The invention discloses a silicon carbide power device junction temperature online accurate extraction method based on a double-sensor Kalman filtering weighted average algorithm, and the method comprises the following steps: 1, enabling a loss model of a power device to receive the phase current, the DC bus voltage, the duty ratio, the phase current and the DC bus voltage from an inverter; the on resistance of the SIC MOSFET, the reference direct current bus voltage, the on loss energy and the off loss energy under the on current and the on threshold voltage of the Schottky diode are obtained from a data manual of the chip, and the gate driving resistor is used for extracting the junction temperature and monitoring operation in real time; and step 2, obtaining an estimated junction temperature through loss calculation of a power device and a thermal network model, and weighting the junction temperatures estimated at different measurement points through a Kalman filtering weighted average algorithm to obtain a more accurate junction temperature for next iterative calculation. According to the method, the limitation of a traditional single sensor in a dynamic working environment can be effectively compensated, and the accuracy and the real-time performance of junction temperature monitoring are improved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Infusion monitoring and automatic blocking device and method

The invention discloses an infusion monitoring and automatic blocking device and method. The device comprises a blocking mechanism, a monitoring module and a control module. The blocking mechanism controls the first abutting piece and the second abutting piece to be close to each other through the driving piece so as to clamp the infusion tube. The monitoring module adopts a double-sensor scheme of an upper sensor and a lower sensor and is used for monitoring liquid drop pulse and liquid level height. And the control module operates a weighted average data fusion algorithm based on confidence, and calculates the actual dripping speed after fusion. According to the device, the accuracy and reliability of infusion state monitoring are improved through a dynamic calibration algorithm and data fusion. The control module can accurately identify three main risk states, namely dripping speed and flow abnormity, infusion completion and pipeline gas abnormity. When it is judged that the infusion tube flow channel is abnormal, the control module drives the blocking mechanism to rapidly block the infusion tube flow channel, a double confirmation mechanism is arranged to provide safety redundancy, a safety closed loop of'detection-decision-execution 'is formed, and the safety and management efficiency of clinical infusion are improved.
Owner:嘉元医药投资(海南)有限公司

Non-inductive health monitoring and stress early warning intelligent nest mat for pets and control method

The invention discloses a pet non-inductive health monitoring and stress early warning intelligent nest mat and a control method, and belongs to the technical field of pet intelligent articles and intelligent control. Pet physiological parameters are synchronously collected through the piezoelectric pressure sensor and the infrared temperature sensor, the stress level is quantitatively judged based on an AI algorithm model, graded early warning and matching type relieving intervention are triggered according to the stress level, and meanwhile a low-power-consumption control mechanism is carried to achieve long endurance. The intelligent nest mat is of a three-layer detachable waterproof structure and supports a double-sensor high-precision scheme and a single-sensor low-cost scheme at the same time, and all the modules work cooperatively to achieve a whole-process closed loop of monitoring, early warning and relieving. The system solves the problems of wearing resistance, low monitoring precision, untimely early warning, inactive relieving and the like of pets, is suitable for family health monitoring of common pets such as dogs, cats and the like, and has the advantages of non-inductive monitoring, accurate identification, intelligent intervention, low power consumption, flexible scheme and the like.
Owner:SHANGHAI BAMBOO EXHIBITION CO LTD

Single-vector magnetometer motion direction magnetic gradient anomaly detection method

The invention relates to a single-vector magnetometer motion direction magnetic gradient anomaly detection method, which comprises the following steps: based on a single-sensor magnetic gradient measurement technology, obtaining an x-axis motion direction magnetic gradient signal through spatial sampling; preprocessing the magnetic gradient signal in the x-axis motion direction; presetting an orthogonal basis function of the magnetic gradient in the x-axis motion direction; and carrying out magnetic gradient anomaly detection on the preprocessed signal based on a preset orthogonal basis function. The method is superior to a traditional vertical motion directional array double-sensor column magnetic gradient anomaly OBF detection method under the conditions of low noise ratio and platform shaking, has the advantages of being high in real-time performance, low in cost, small in size and the like, and shows a good application prospect under the scenes of danger detection, explosion removal, intrusion monitoring and the like.
Owner:WUCHANG SHOUYI UNIV

Packaging shell protection structure of temperature sensor

The invention discloses a packaging shell protection structure of a temperature sensor, and belongs to the technical field of sensors, the packaging shell protection structure comprises a packaging shell, a dual PT temperature sensing part and a PE vibration sensing part are arranged in the packaging shell, and the packaging shell comprises a probe end, a connecting end and a sensing conversion end; the probe end comprises a probe temperature sensing cover, a middle partition installation piece is arranged in the probe temperature sensing cover, and a vibration tested probe is arranged at the end of the probe temperature sensing cover. Through the design that the PE integrated circuit board is fixed through the U-shaped clamping piece slot and the wire is integrated through the internal control column threading hole, the problem that a vibration core body extrudes a PT sensor lead in traditional assembly is thoroughly avoided, the forming quality and long-term stability of a product are remarkably improved, an electric gap is increased, and the insulation and voltage resistance performance is improved; the design that two platinum resistor temperature sensing elements are matched with a heat insulation cavity is adopted, sensors are rapidly switched through a magnetic control system, temperature recovery does not need to be waited, and the response speed is greatly increased; the data of the two sensors are mutually corrected, and the temperature measurement precision and reliability are improved.
Owner:SHENYANG XINGHUA HWA YICK RAIL-TRAFFIC-ELECTRICAL APPL

Double-range current measurement system based on solid-state relay

The invention discloses a double-range current measurement system based on a solid-state relay, and relates to the technical field of current measurement. The system comprises a closed-loop Hall current sensor, a first shunt resistor, a second shunt resistor, a solid state relay (SSR), a Hall conditioning IC and an external controller. Two shunt resistors with different resistance values are dynamically switched through a solid-state relay, and compatibility of low-current high-precision measurement and high-current wide-range measurement is achieved. The method solves the problems that the precision and range of an existing single-range sensor are difficult to consider, double sensors are high in cost, mechanical relays have defects and the like, has the advantages of low cost, high reliability, good measurement precision and the like, and is suitable for wide-dynamic-range current measurement scenes such as an energy storage system and the like.
Owner:MEGA-PHASE ELECTRONIC TECH LTD SHANGHAI

Self-adaptive ultrahigh frequency partial discharge signal extraction device and method based on bimodal noise reference

The invention discloses a self-adaptive ultrahigh frequency partial discharge signal extraction device and method based on dual-mode noise reference, and relates to the technical field of communication, and the device comprises a dual-sensor cooperative collection system which comprises a directional ultrahigh frequency sensor group and a noise feature learning module; the self-adaptive noise elimination device is connected with the dual-sensor collaborative acquisition system; and the intelligent signal identification system is connected with the self-adaptive noise elimination device. An auxiliary sensor in the directional ultrahigh frequency sensor group is specially used for collecting environmental background noise, and the noise feature learning module is used for extracting a time-frequency domain feature spectrum of the background noise by using Hilbert-Huang transform, so that the device can know the feature change of the noise in real time. Meanwhile, a dynamic threshold value adjusting unit in the self-adaptive noise elimination device can automatically adjust a signal triggering threshold value according to the noise energy level, automatic tracking of noise changes is achieved, and the adaptability of the device to the complex noise environment is greatly improved.
Owner:SHANGHAI MOKE ELECTRONIC TECH CO LTD

Aircraft control method based on dual-sensor fusion barometric altitude compensation and attitude calculation

The invention discloses an aircraft control method based on barometric altitude compensation and attitude calculation of dual-sensor fusion, and the method comprises the steps: carrying out the temperature compensation and attitude calculation through collecting the data of a barometric sensor and an inertial measurement unit, and obtaining an original altitude and an Euler angle; processing the original height based on an alpha-beta filter to obtain an air pressure estimation height, and calculating an inertial navigation height and a vertical speed through attitude conversion integral; a self-adaptive complementary filtering strategy is adopted, the fusion weight is dynamically adjusted according to the air pressure estimation height variance, the high-frequency inertial data and the low-frequency air pressure data are fused, and accurate fusion height and vertical speed are output; finally, constructing a cascade controller, and calculating a target vertical speed instruction by an outer ring according to the expected height deviation; the inner ring generates an actuator signal based on the deviation to drive a motor; height stable control is achieved, so that drifting is effectively restrained, the precision and the response speed are improved, and reliable height control of the aircraft under vibration or air pressure changes is achieved.
Owner:SHENZHEN POLYTECHNIC

A calibration-free liquid level detection device, method and washing machine

The application provides a kind of calibration-free liquid level detection device, method and washing machine, comprising: first TMR sensor is arranged above the liquid surface to be measured, second TMR sensor is arranged below the liquid surface to be measured, magnetic float floats on the liquid surface to be measured;The magnetic field intensity detected by the first TMR sensor is collected simultaneously, and the magnetic field intensity detected by the second TMR sensor is collected simultaneously;The ratio of the two magnetic field intensities is calculated;Then the liquid level height of the liquid surface to be measured is calculated according to the ratio of the two magnetic field intensities.The liquid level height of the liquid surface to be measured can be calculated by the ratio of the magnetic field intensity detected by the double TMR sensor, the ratio of the magnetic field intensity can offset the magnetic field attenuation of permanent magnet, common mode electromagnetic interference, sensor individual difference, without factory calibration and regular calibration, can greatly improve production efficiency, reduce maintenance cost;Without complex mechanical structure, installation is convenient;No mechanical contact wear, overall reliability is high, life is significantly better than traditional detection scheme.
Owner:GOERTEK MICROELECTRONICS CO LTD

Two-wheeled vehicle energy recovery system based on multi-mode sensing and super capacitor partition management and control method

The invention discloses a two-wheeled vehicle energy recovery system and method. The system comprises an environment sensing module (a GPS, an air pressure sensor, a gyroscope, a terrain processor and a Kalman filtering prediction gradient), a signal acquisition module (a brake force sensor, a wheel speed sensor, a load sensor, a temperature sensor and a double-SOC sensor), and a super capacitor module (an energy storage area is made of a high-energy density material; the energy discharge region is made of a high-power-density material; the execution output module comprises a hub motor, a rectifier, a double-LLC converter, a relay, a clutch, a PTC and a liquid cooling system. The method comprises the steps that 1, dynamic energy recovery is conducted, specifically, the total required braking force is calculated during braking, regeneration or friction braking is selected according to the SOC of an energy storage area, and the regenerative braking force is limited by motor characteristics and capacitor voltage; 2, intelligent energy transfer: an energy storage area SOCgt; and when the temperature is 80%, the transfer amount is calculated according to the state, and is transferred within the temperature control range of-20 DEG C to 65 DEG C through SOC correction in an energy discharge region. According to the invention, the recovery efficiency and the service life of the system are optimized through capacitor partitioning and multi-mode control.
Owner:ZHEJIANG UNIV OF TECH

Two-parameter linkage heat recovery refrigerating unit cooling system and method

According to the double-parameter linkage cooling system and method for the heat recovery refrigerating unit, the output frequency of the frequency conversion execution module is dynamically adjusted through double-parameter linkage control of the condensation pressure and the heat recovery water supply temperature, and then the rotating speed or the start-stop state of the cooling water pump is controlled; flow regulation of a traditional cooling water side bypass circulating pipe is replaced, cooling requirements under different loads are met, a cooling water pump is started, stopped and regulated in speed according to requirements, the function of improving the operation efficiency of a cooling system is achieved, system energy consumption is reduced, and the service life of equipment is prolonged. A traditional cooling water side bypass circulating pipe is omitted, the system structure is simplified, the modification cost is low, the period is short, and upgrading and modification of various existing heat recovery refrigerating units are adapted; according to the method, working condition unbalance caused by single-parameter control is avoided through two-parameter cooperative regulation and control, meanwhile, multiple protection mechanisms such as double-sensor backup, minimum rotating speed limitation and an anti-lock program are set, and safe operation of a unit is ensured.
Owner:MCC SOUTHERN CITY CONSTR ENG TECH CO LTD +1