208 results about "Mechanical sensor" patented technology

The invention discloses a position-free sensing method for a joint module based on rotating speed estimation and virtual Z correction. The method comprises the following steps: firstly, acquiring three-phase current of a permanent magnet motor for a joint module, and acquiring d-axis estimated current of a current period based on a d-axis current model in combination with a state quantity of the permanent magnet motor in a previous control period; based on the d-axis estimated current, constructing a rotating speed estimator taking the d-axis estimated current error as a sliding mode surface to obtain the estimated rotating speed of the motor rotor; integrating the estimated rotating speed, and combining with the initial position of the rotor to obtain the estimated position of the motor rotor in the current period; at the same time, at the zero crossing point of the stator phase current, the estimation position is forcibly corrected to a predetermined electrical angle corresponding to the zero crossing point so as to eliminate the integral error. The invention aims to directly estimate the rotating speed without depending on any intermediate signal, and simulate the correction mechanism of a mechanical sensor to eliminate the estimation error, thereby realizing high-performance noise-free full-speed-domain position-free sensing control.

The invention relates to a sensor, a measuring device and a measuring method for in-situ dynamic measurement of mechanical properties of a miniature bionic flapping-wing air vehicle, and belongs to the field of MEMS (micro electro mechanical system) mechanical sensors. Based on a micro electro mechanical system (MEMS) processing technology, a six-axis mechanical sensor is designed and prepared, and a measuring device is designed and prepared by integrating the six-axis mechanical sensor, so that integrated assembly of the mechanical sensor and the miniature flexible bionic flapping wing is realized, and in-situ dynamic measurement of the mechanical property of the miniature bionic flapping wing aircraft is realized. The problem that in-situ dynamic measurement of the mechanical property of the bionic flapping-wing aircraft is difficult to achieve through an existing measurement method is solved, and test data support is provided for further optimizing the flapping-wing structure and improving the flight efficiency.

The invention discloses a power battery multi-field coupling in-situ test platform and method, and relates to the technical field of battery test.The power battery multi-field coupling in-situ test platform comprises a test module and a data acquisition module, and the test module comprises an explosion-proof box inner container and an explosion-proof box inner container partition plate arranged in the explosion-proof box inner container; the explosion-proof box inner container partition plate divides the interior of the explosion-proof box inner container into a test area and a temperature and humidity control area, and the temperature and humidity control area is communicated with the test area through the explosion-proof box inner container air outlet. A battery clamp for fixing a battery, an extrusion needling mechanism for executing an extrusion needling test on the battery, and a drop hammer mechanism for executing a dynamic impact test on the battery are arranged in the test area; the data acquisition module comprises charging and discharging equipment, an electrochemical workstation, a multi-channel data recorder, a camera, an infrared thermal imager, a displacement sensor, a mechanical sensor, a stress sensor, a strain sensor and a thermocouple. And the actual performance of the power battery under the multi-dimensional working condition is comprehensively evaluated.

The invention relates to the technical field of mechanical sensors, and discloses an automobile wire harness terminal tension testing device and a detection method thereof.The automobile wire harness terminal tension testing device comprises a testing table, a conveying table and a conveying table are arranged on the two sides of the testing table respectively, a transmission device is arranged between the conveying table and the conveying table, a detection device is arranged on the conveying table, and a fixing piece is arranged on the conveying table; the transmission device comprises a rotating piece and a clamping piece, and the detection device comprises a rotating piece, clamping jaws arranged on the periphery of the rotating piece, an adjusting piece for controlling displacement of the clamping jaws, a tension sensor and a storage box. According to the invention, through the arrangement of the transmission member, single transportation of the wire harness and tensioning of the wire harness, and the arrangement of the fixing member, the middle part of the wire harness is fixed, so that the problems that the wire part of the wire harness is in an unfixed state and the tension part applied by the tensile machine is borne by the wire, and therefore, after the tension tester applies the maximum tension value to the wire harness, the tension of the wire harness is not influenced are solved. And the detection result of the tensile force between the wire harness and the terminal is not accurate.

The invention relates to the technical field of tool machining data acquisition, and provides a broaching tool machining data acquisition method and system, and the method comprises the steps: obtaining original information flows from various mechanical sensors, carrying out the time alignment of the original information flows, and obtaining the aligned original information flows; identifying a transient event based on the aligned original information flow, and extracting multi-dimensional features of the transient event; constructing a multi-channel space-time correlation fingerprint database; constructing a real-time multi-channel event sequence on each channel based on the transient event and the multi-dimensional features, and matching the real-time multi-channel event sequence with a multi-channel space-time association fingerprint database to obtain a fingerprint matching result; and based on the real machining event fingerprints and the electromagnetic noise fingerprints, a real machining event and electromagnetic noise are distinguished in combination with a fingerprint matching result, so that the broaching tool state and machining abnormality are recognized. The method has the effect of improving the accuracy of broaching tool state recognition and machining abnormality diagnosis.

The invention relates to the technical field of mechanical structure health monitoring and diagnosis, and discloses a health assessment method for a pump valve driven by a mechanical sensor. A plurality of acceleration sensors are axially arranged on a pump valve shell, static sampling is firstly carried out to solve a static mean value, and zero offset correction is carried out on an operation sequence; setting a unified sampling period and time length, and synchronously acquiring synthetic vibration averaged according to moments; establishing discrete frequency coordinates, and calculating sine and cosine superposition amplitudes frequency by frequency to form a spectrum; performing neighborhood comparison and peak taking, calculating an energy ratio, and determining main resonance by using the energy with the maximum ratio and the smaller frequency; setting sliding windows, and solving dominant frequency window by window; drifting is calculated with the first window as the reference and normalized into a relative drifting ratio; constructing main frequency stability according to the drift difference and the drift distance of the adjacent windows, and calculating a mean value; and constructing health indexes according to the relative drift ratio average absolute value and the stability mean value, and performing graded output.

The invention belongs to the field of mechanical sensors, and discloses a full-plane six-dimensional force sensor. The sensor comprises a fixed table, a central loading table, eight radial beams and four circumferential beams which are arranged on the same central plane in the thickness direction, the radial beams are uniformly arranged between the central loading table and the fixed table at intervals along the circumferential direction; the radial beams which are symmetrical in pairs form a group of radial beams, two groups of radial beams which are perpendicular to each other are Fx-axis radial beams and Fy-axis radial beams respectively, and the other two groups of radial beams are Mz-axis radial beams and Fz-axis radial beams respectively; the four circumferential beams are matched with the four radial beams which are arranged at intervals one by one, and the circumferential beams are vertically and equally divided by the radial beams; the circumferential beams perpendicular to the Fx-axis radial beams are My-axis circumferential beams, and the circumferential beams perpendicular to the Fy-axis radial beams are Mx-axis circumferential beams; the strain gauges are divided into six groups, and each group of strain gauges form an independent full-bridge circuit. According to the invention, inter-dimensional crosstalk is eliminated from a mechanical structure, and the sensor has the advantages of high sensitivity, isotropy, strong overload capability and easy processing.

The invention discloses a thrombelastogram calibration method, device, system and equipment and a storage medium, and the method comprises the steps: generating an initial thrombelastogram in a process that a blood sample rotates along with a container, through a mechanical torsion signal which drives a suspension wire to move in and after a process that the blood sample forms a blood clot, and collecting the initial thrombelastogram through a mechanical sensor; the method comprises the following steps: generating a light intensity time change chart through near-infrared light signals collected by a spectrograph, and extracting an attenuation rising rate representing a blood sample coagulation rate, an attenuation value representing blood sample coagulation intensity and an attenuation recovery rate representing fibrinolysis after blood sample coagulation, so as to calibrate an initial thromboelastogram and obtain a calibrated thromboelastogram. Therefore, on the basis of the thrombelastogram measured on the basis of the mechanics principle, the attenuation signal measured by the near-infrared optical principle is utilized to calibrate the thrombelastogram, the influence of non-coagulation factor interference on only mechanical signals is reduced, and the accuracy and the reliability of generating the thrombelastogram are improved.

The invention discloses a surface cleaning method for a large complex magnesium alloy structural part formed through electric arc additive manufacturing, and belongs to the field of post-treatment of formed structural parts after electric arc additive manufacturing. The method comprises the following steps that a mechanical arm is adopted to drive a special wire brush to conduct preliminary mechanical cleaning, and flexible contact is achieved through a mechanical sensor and a floating clamp; acidic cleaning liquid is sprayed to the surface of the workpiece through an ultrasonic spraying system, the surface color change is monitored in real time through a high-speed camera so as to control the reaction endpoint, and flushing and drying are conducted in time; and finally, carrying out fine cleaning under the protection of argon by adopting large-light-spot laser with low power density, and monitoring in real time through a spectrograph to ensure the cleaning effect. According to the method, the oxide layer and the pollutants on the surface of the large complex component can be efficiently, losslessly and automatically removed, the problem that the magnesium alloy WAAM component is difficult to clean due to high chemical activity and complex structure is solved, and the whole process is environmentally friendly and controllable.

This invention belongs to the field of testing technology. It discloses a conveyor belt mechanical property testing device, comprising a conveyor belt, a loading device, and a computing system. A flexible mechanical sensor is installed within the conveyor belt, and a laser rangefinder is mounted on the loading device to characterize the deformation of the conveyor belt. The computer processing system processes the mechanical signals detected by the flexible mechanical sensor and the distance signals detected by the laser rangefinder, thereby outputting the elastic modulus of the conveyor belt. By employing a flexible mechanical sensor and a computer-controlled loading device to conduct different loading experiments, the stress conditions of the conveyor belt under different working conditions are simulated and calculated. Based on the results, the selection of the conveyor belt in actual production design is guided, effectively improving the matching degree between the conveyor belt and the working conditions, extending the service life of the conveyor, and reducing accidents caused by conveyor belt breakage.

The invention discloses a micro-electro-mechanical sensor and a preparation method thereof, and the micro-electro-mechanical sensor comprises the components of a substrate which is internally provided with a groove which extends from a first surface of the substrate to the interior of the substrate; the first dielectric layer covers the first surface of the substrate and covers the bottom and the side wall of the groove; the buried layer is located in the groove and is isolated from the substrate through the first dielectric layer; the protection layer is positioned on the first dielectric layer which is not covered by the buried layer and the buried layer; the detection electrode is positioned on the protection layer and is opposite to the buried layer; the functional layer is located on the protective layer and the detection electrode, the functional layer comprises a fixed part and a movable part, and a gap is formed between the movable part of the functional layer and the detection electrode; the bonding pad is located on the functional layer, and the bonding pad is electrically connected with the detection electrode and the functional layer.

The application discloses a method and structure for confirming two-dimensionality of airfoil test and wind tunnel side wall interference area, and belongs to the technical field of airfoil test based on mechanical sensors. The method solves the problem that the traditional wind tunnel side wall interference evaluation method for airfoil test in the prior art is difficult to accurately determine the wind tunnel interference range; the method comprises the following steps: S1. A plurality of pressure measuring holes are arranged on the upper surface of an airfoil model at least two positions along the span direction from the center section of the airfoil model as a starting point, and an airfoil model upper surface pressure hole area is arranged; S2. The size of the two-dimensionality of the airfoil test and the wind tunnel side wall interference area is confirmed by analyzing the pressure distribution measurement results of the airfoil model upper surface pressure hole area and according to evaluation conditions. The application effectively improves the range accuracy of the wind tunnel side wall interference area of the airfoil test, can provide support for airfoil pressure distribution measurement, and can be applied to confirming the two-dimensionality of the airfoil test and the wind tunnel side wall interference area.

The application discloses a five-axis measuring machine probe force monitoring method and system, and relates to the technical field of probe force monitoring. The method collects multi-dimensional force signals of the probe through a mechanical sensor, decomposes an axial component, dynamically maps the probe attitude to a workpiece coordinate system, performs smooth processing on a force vector with an excessive change rate, matches a historical database to identify key feature points of complex geometric contact, converts to a local coordinate system of a contact point to obtain a force state, and adjusts a motion path if the components are unbalanced. The system is provided with multi-dimensional force collection and decomposition, attitude transformation, feature analysis, adjustment control and evaluation report modules, realizes the above functions, and improves measurement accuracy and equipment reliability through monitoring, adjustment and stability evaluation.

Micromechanical sensor device with: an ASIC substrate (10) with a first front side (VSa) and a first back side (RSa); a rewiring device (20) formed on the first front side (VSa) with a plurality of stacked conductor track levels (LB0, LB1) and insulation layers (I); a MEMS substrate (9) with a second front (VS) and a second back (RS); a first micromechanical functional layer (16) formed above the second front surface (VS); a second micromechanical functional layer (17) formed above the first micromechanical functional layer (16), which is connected to the rewiring device (20) via a bond connection (50); wherein a movable sensor structure (MS) is formed in the second micromechanical functional layer (17) which is anchored on one side to the MEMS substrate (9) via a first anchoring area (17b') formed in the second micromechanical functional layer (17); wherein in the second micromechanical functional layer (17) an electrical connection element formed in a second anchoring area (17d; 17d'; 17d'') is anchored on one side via a contact area (52) of the bond connection (50) on the ASIC substrate (10); and wherein the first anchoring area (17b') and the second anchoring area (17d; 17d'; 17d'') are elastically connected to each other via a spring element (17c) formed in the second micromechanical functional layer (17).

The application discloses a tensile strength detection device for PI film production for display panels and relates to the technical field of PI film tensile strength detection. The device comprises a supporting mechanism, a connecting frame, a fixing frame, a crossbeam, a first screw rod, a mechanical sensor, an upper fixing block, a control panel, a bidirectional screw rod, a connecting block, an upper fixing straightening assembly, a second screw rod, a guide rod, a scale plate, a lower fixing block and a lower straightening fixing assembly. The device triggers hydraulic linkage when clamping the film, makes the first rotating roller roll and move forward, actively flattens the film edge in a rolling mode, prevents wrinkles from affecting detection, triggers the wedge-shaped block to be automatically clamped by the convex rod during the downward movement of the lower straightening fixing assembly, continuously flattens the lower end of the film by the second rotating roller, cooperates with the observation plate to be quickly positioned, reduces manual measurement and improves detection efficiency.

The present application relates to a kind of device and method for measuring solid-liquid two-phase flow dynamics information, including measuring plate, glass plate, pore pressure sensor, filter screen, triaxial force sensor, force plate, outer pressure strip, inner pressure strip, sealing film, sensor bracket, dynamics information includes the pressure of liquid component in two-phase flow and the force of overall to force plate;The present application can ensure fluid seal when the mechanical sensor is reasonably measured dynamics information;Meanwhile, the present application can also realize the simultaneous measurement of solid-liquid two-phase flow kinematics and dynamics information by mechanical sensor cooperation high-speed camera technology.

A muscle activation sensing system includes a mechanical sensor mounted on a body part and is configured to detect a change in a muscle associated with the body part. A location of the muscle activation sensing system on the body part is determined. A control signal is derived based on the detected change in the muscle associated with the body part and the determined location. The control signal is outputted to a device.

The invention discloses a ring type blood glucose noninvasive detection device based on multi-modal sensing fusion, and relates to the technical field of medical detection equipment. A baseline construction module; an interference decoupling module; a cross-mode experience verification module; a result feedback module; by integrating optical, electrochemical and mechanical sensors, the accuracy and anti-interference capability of blood glucose noninvasive detection are improved by using a multi-modal data fusion technology, and the traditional single-modal limitation is broken through; meanwhile, a self-supervised learning algorithm is adopted to construct a personalized digital twin baseline, dynamic adjustment is performed in combination with data such as diet and exercise of the user, and customized health intervention suggestions are generated, so that the design not only improves the clinical applicability of noninvasive detection, but also improves the continuity of blood glucose monitoring through a closed-loop management mode, reduces the risk of complications, and improves the accuracy of blood glucose monitoring. And an innovative scheme is provided for chronic disease management.

This invention relates to the field of debris flow monitoring and prevention, and specifically to a debris flow prevention device and early warning method with integrated monitoring. The invention includes a force plate, baffles, rigid piles, and an intelligent early warning module. It uses a three-component mechanical sensor and a pore water pressure sensor to monitor in real time, capturing the shear stress, normal stress, and pore water pressure at the bottom of the debris flow, and analyzing the differences in internal stress distribution. A single rigid pile and two baffles constitute a protective unit, deployed along the channel. The cooperation between the force plate and the baffles forms a linkage between monitoring and prevention. When the force plate detects the passage of debris flow, the baffles move upstream to intercept it; when the force plate detects a decrease in debris flow flow, the baffle opening turns downstream for self-cleaning. The intelligent early warning module integrates multi-source sensor data based on 5G communication, and triggers a three-level graded early warning through theoretical quantitative analysis such as corrected Froude numbers and corrected impact loads. This invention achieves coordinated flow perception, graded early warning, and dynamic protection, improving prevention efficiency and early warning accuracy.

The application discloses a preparation method of a rare earth coordination type force-induced multi-fluorescent color variable gel, and comprises the following steps: dissolving a Schiff base ligand molecule, a monomer, an initiator and a crosslinking agent in deionized water, and stirring uniformly to obtain a stable solution, wherein the monomer is at least one of acrylamide, ethyl acrylate, methyl acrylate and methacrylic acid; adding a rare earth compound into the stable solution to obtain a prepolymer solution, and obtaining the rare earth coordination type force-induced multi-fluorescent color variable gel through free radical polymerization; the method has mild conditions, simple steps and is easy to realize. The application further discloses the force-induced multi-fluorescent color variable gel prepared through the preparation method; the types of the rare earth ions and the Schiff base ligand molecules are adjusted to obtain a multi-color fluorescent gel, and the visual fluorescent color change is realized under the action of external force. The force-induced multi-fluorescent color variable gel is combined with other functional materials to realize the integration of multiple functions, and can be applied to multiple fields such as optical devices and mechanical sensors.

The invention describes a method for protecting an autonomously operated passenger car (1) from interference (50) by a passenger, wherein a potentially imminent interference (40) and / or an actual interference (50) in a driver control element (24) of the passenger car (1) is detected by means of at least one electromagnetic sensor (32) and / or at least one mechanical sensor (34), wherein the detected potentially imminent and / or actual interference (40, 50) is assigned a security level (S1-S4), and wherein, depending on the security level (S1-S4), a corresponding interaction with the passenger takes place and / or a driving maneuver (M) of the passenger car (1) is automatically controlled, in which at least one driving speed is reduced.

The application relates to the technical field of vehicle door equipment, and discloses a vehicle door anti-pinch method and system based on sensors and visual recognition and a vehicle. The method comprises the following steps: acquiring a limb tracking image around a vehicle door through an imager; inputting the limb tracking image into a pre-trained neural network model to output limb state information; acquiring limb contact information around the vehicle door through a sensor; determining a limb pinching risk state according to the limb state information and the limb contact information; and generating an anti-pinch instruction to control the vehicle door to open or stop closing when the limb is in the pinching risk state. The method solves the problem of inaccurate anti-pinch process determination caused by mechanical sensor detection in the prior art.

The application discloses a kind of microscale high-precision compression-shear integrated mechanical loading device and method based on piezoelectric actuator.The device includes integrated strain gauge system piezoelectric actuator, high-precision mechanical sensor, X / Y / Z three-way piezoelectric displacement table and test table.Piezoelectric actuator and Y direction displacement table are fixed on the vertical two ends of test table, Z direction displacement table is placed on Y direction table, X direction displacement table is connected with Z direction table through steering mounting base A, and high-precision mechanical sensor is fixed on X direction table through steering mounting base B.The application realizes closed-loop control of piezoelectric actuator displacement through strain gauge system, effectively compensates hysteresis and creep error;combined with high-precision force sensor, force and displacement signals are synchronously collected;three-way displacement table is used to accurately center and switch compression, shear and other loading modes.The device is compatible with scanning electron microscope, can be in-situ observed, and is suitable for high-precision mechanical property testing of microscale materials.

The invention provides an automatic-leveling hard-pressing hard nano-imprinting device which comprises a six-axis motion platform, an imprinting platform is arranged at the lower end of the six-axis motion platform, a chuck mechanism is arranged at the lower end of the imprinting platform, and a substrate and a template for hard-pressing hard nano-imprinting are arranged at the lower end of the chuck mechanism; the three groups of laser ranging probes are arranged around the six-axis motion platform in a central symmetry manner and are used for measuring the distance between the substrate and the template in a non-contact manner; the distance measuring tool plate is used for fixing the three sets of laser distance measuring probes, and through holes are formed in the imprinting platform and used for allowing laser of the laser distance measuring probes to penetrate through; the mechanical sensor groups are arranged on three sides of the imprinting platform and are used for detecting pressure distribution between the substrate and the template in the imprinting process; and the control system is used for receiving data of the laser ranging probe and the mechanical sensor. The nanoimprint laser ranging and leveling mechanism is applied to hard-to-hard nanoimprint equipment and is simple in structure, high in leveling precision and low in cost.

The application provides a kind of light loss detection feeding amount monitoring method and device, it is related to feeding amount monitoring technical field, first in the stem state calibration reference light intensity value;In operation, the light intensity signal when stem sheltering light transmission seam is collected in real time, and the chain harrow transmission speed is obtained synchronously. Again, the light intensity signal is calculated by using the integral model, and the average light loss rate in the unit length is calculated. This step significantly improves the stability and accuracy of measurement. Finally, based on the pre-calibrated light loss rate and the fitting curve of feeding amount, the real-time feeding amount is calculated and automatic control is realized. The application overcomes the defects of traditional mechanical sensor being easily disturbed by vibration and visual scheme relying on light, has the advantages of strong anti-interference ability and all-weather working, and provides reliable technical support for precise control of combine harvester feeding amount and efficient and low-loss operation.

The invention relates to the technical field of physical simulation of geotechnical engineering geological disasters, and discloses a karst vacuum suction corrosion simulation experiment device under dynamic and static load coupling action, which comprises a test box, a vacuum suction corrosion simulation system, a dynamic and static load loading system, a comprehensive monitoring system and a central control system, the test box is filled with covering layers for simulating karst in a layered mode, a plurality of karst cavities are formed in the covering layers, and the top of the test box is slidably connected with a movable platform. The dynamic and static load loading system is mounted on the mobile platform; the comprehensive monitoring system comprises a mechanical sensor array, a negative pressure sensor and a visual monitoring unit; the mechanical sensor array is embedded in the covering layer; the negative pressure sensor is installed in the karst cavity. According to the invention, while vacuum suction corrosion is simulated, independent or coupled static and dynamic loads with adjustable sizes and positions are applied to a karst covering layer, so that the formation, development and dissipation processes of vacuum negative pressure in a karst cavity are accurately simulated, and the authenticity and accuracy of simulation are improved.

A method for handling packages (2) is described and illustrated, each comprising a packaging material and a packaged item packed in the packaging material, in particular in a sorting station (1). In order to reduce the logistical effort resulting from damaged packaged items, it is provided that at least some of the packages (2) to be handled are subjected to at least one defined test movement in a test station (18) to induce acoustic and / or mechanical response signals depending on possible damage to the packaged item, that the response signals are detected by at least one acoustic and / or mechanical sensor (26, 27) assigned to the test station (18) and forwarded to an evaluation unit, that the evaluation unit (11) subjects the response signals to pattern recognition based on a multitude of previously empirically determined correlations between response signals and possible damage to the associated packaged items.that the evaluation unit (11) assigns at least one damage parameter characterizing possible damage to the packages (2) based on pattern recognition, and that the packages (2) are handled further in different ways depending on the respective damage parameter.

The utility model discloses a kind of mechanical sensor wiring device, a kind of mechanical sensor wiring device, the inside two sides of shell are equipped with clamping plate, clamping plate and the bottom inner wall of shell are equipped with clamping joint, the height of clamping joint is adapted to the mounting seat height of mechanical sensor;The upper portion of clamping plate is equipped with clamping seat, clamping seat is equipped with the clamping groove adapted to the extension line of mechanical sensor, the side of shell is equipped with outlet hole.Mechanical sensor can be quickly and accurately embedded in clamping joint, realize stable installation, greatly save installation time and manpower cost, improve installation efficiency.Chip groove will extension line of mechanical sensor be placed in neat order, avoid extension line messy entanglement.Chip plate and the bottom inner wall of shell synergistic effect, strengthen the support force of docking mechanical sensor mounting seat, the design of clamping seat and clamping groove also assist fixed sensor and its extension line to some extent, guarantee mechanical sensor normal work.