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99 results about "High acceleration" patented technology
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Double-ring shear type acceleration sensor and forming method thereof
The invention discloses a double-ring shear type acceleration sensor and a forming method thereof, and belongs to the field of sensors. The sensor comprises a base, an annular mass block, a first piezoelectric ring, a second piezoelectric ring, an upper cover and a connector, the base comprises a bottom plate, an outer annular surrounding plate and an inner annular surrounding plate, the outer annular surrounding plate and the inner annular surrounding plate are coaxially arranged, a second threaded hole is formed in the outer annular surrounding plate, and the connector is installed in the second threaded hole and is in threaded fit with the second threaded hole; a first annular boss and a first annular positioning step are arranged on the outer annular face of the inner annular surrounding plate, and a second annular boss and a second positioning step are arranged on the inner annular face of the outer annular surrounding plate. The first piezoelectric ring and the second piezoelectric ring are polarized in the same direction in the axial direction. The double-layer annular nested structure ensures the lateral bending resistance of the sensor, and the lightweight design increases the bandwidth of the sensor. The structure center penetrating type mounting hole can ensure tight connection between the sensor and an object to be detected, so that the detection precision of the acceleration sensor can be improved.
Owner:SHENZHEN UNIV
Ultra-precise double-drive high-acceleration hydrostatic guide rail device
PendingCN120439040AMeasurement/indication equipmentsLarge fixed membersHigh accelerationGravity center
The invention relates to the field of ultra-precision machine tools, and provides an ultra-precision double-drive high-acceleration hydrostatic guide rail device. The ultra-precise double-drive high-acceleration hydrostatic guide rail device comprises a guide rail base, a guide rail assembly and a guide rail movement assembly, the guide rail assembly comprises at least two guide rails and at least one side guide rail, the at least two guide rails are arranged on the upper portion of the guide rail base in the width direction of the guide rail base at intervals, and one side guide rail is arranged between every two adjacent guide rails. According to the hydrostatic pressure guide rail device, the supporting oil cavity is formed in the bottom of the slide carriage, and the auxiliary oil cavity is formed in the side, close to the guide rail, of the top of the hydrostatic pressure sliding block, so that the position of the supporting oil cavity surface is lifted; due to the fact that the hydrostatic pressure sliding block and the sliding block heightening column are located below the supporting oil cavity face, the overall gravity center of the guide rail movement assembly moves downwards and is coplanar with the supporting oil cavity face, the influence of upsetting moment on the thickness of a supporting oil film is reduced, and the accuracy of the hydrostatic pressure guide rail device is improved.
Owner:GENERAL TECH GRP MASCH TOOL ENG RES INST CO LTD
Method for evaluating service life of gear
The invention discloses a gear service life evaluation method, and belongs to the technical field of aerospace mechanism service life evaluation. According to the technical scheme, firstly, a five-stress wear rate data set containing the rotating speed, the torque, the temperature alternating, the vacuum degree and the microgravity is established; then constructing a tooth surface solid lubricating film thickness evolution model based on a Hertz-Archard coupling model, and taking the film thickness approaching to zero as a failure criterion; acceleration factors under each acceleration working condition are calculated through model iteration, and a gear acceleration life test is carried out under an optimized working condition; after the test, the film thickness is measured and compared with model prediction, the rated working condition life of the gear is reversely deduced, the long-time on-orbit life of the gear is equivalently predicted through the short-time ground test, and high acceleration efficiency and reliability are achieved. The technical problems of environmental simulation distortion and low acceleration efficiency in aerospace lubrication gear service life evaluation are solved.
Owner:BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
Reliability evaluation method and device based on highly accelerated life test fault data
PendingCN121257056ADesign optimisation/simulationInference methodsAcceleration factorData transformation
The invention provides a reliability evaluation method and device based on highly accelerated life test fault data in order to solve the problems that the reliability of existing highly accelerated life test fault data lacks an effective quantitative evaluation means and the evaluation precision is insufficient due to limited fault data. The method comprises the following steps: converting fault data in a step stress test into equivalent fault data under a normal stress condition according to an acceleration factor and time reduction principle; based on a Bayesian theory and a self-service sampling method, constructing a single-parameter reliability evaluation model; and constructing a multi-parameter reliability evaluation model by adopting an entropy-distance fusion algorithm, and carrying out comprehensive evaluation on the reliability of the test complete machine. According to the method, the time reduction principle and the Bayesian theory are combined, reliability quantitative evaluation under the stepping stress condition is achieved, the evaluation precision is improved, compared with performance degradation data, the method has wider applicability, and the actual evaluation requirement can be better met.
Owner:SICHUAN ZHONGWU RUILAI TECH CO LTD +1
Medium-assisted acceleration structure and method for realizing low loss and high acceleration gradient by using low-temperature environment
The invention relates to the technical field of particle accelerators, and provides a medium-assisted acceleration structure and method for realizing low loss and high acceleration gradient by using a low-temperature environment. The structure comprises a medium-assisted acceleration structure body and a low-temperature maintenance and control system, the medium-assisted acceleration structure body comprises a medium layer and a metal cavity to provide electromagnetic field distribution, and the low-temperature maintenance and control system is integrated on the body to maintain the working temperature of the body to be less than or equal to 77K, reduce resistance and dielectric loss and improve a radio frequency breakdown threshold; according to the invention, the radio frequency breakdown threshold is increased at a low temperature, so that the acceleration structure stably operates under higher electric field intensity, and the particle energy gain is increased; the metal resistivity and the dielectric loss are synchronously reduced, the total power loss is reduced, and the energy efficiency is improved; micro-discharge and gas desorption effects are inhibited, the structural stability is improved, and the service life of equipment is prolonged; through low-temperature adaptive design and systematic integration, electromagnetic performance and mechanical reliability are ensured, and the synergistic advantage of low temperature and medium assistance is exerted.
Owner:CHINA SPALLATION NEUTRON SOURCE SCI CENT +1
Active vibration isolation control method, system and electronic device
This invention relates to the field of vibration control technology, providing an active vibration isolation control method, system, and electronic device. The method includes: determining the displacement change rate and current displacement value based on actuator displacement data; determining the motion trajectory based on load displacement data; when the motion trajectory is a preset trajectory, determining a first control signal based on the displacement change rate and a feedforward control signal; when the motion trajectory is not a preset trajectory and the displacement change rate is ≥ a preset disturbance threshold, determining the first control signal based on the displacement change rate, current PID parameters, and a preset gain control coefficient ratio; when the motion trajectory is not a preset trajectory and the displacement change rate is < the disturbance threshold, determining the first control signal based on the displacement change rate and current PID parameters; determining a second control signal based on the current displacement value and multi-level displacement thresholds; and determining an output signal to control the actuator based on the first and second control signals. This addresses the problem of insufficient vibration isolation effect of related active vibration isolation control methods under high acceleration load conditions.
Owner:SUZHOU TECH BELL DIRECT DRIVE MOTOR CO LTD
Reaction coupling type momentum transfer propulsion system and method
PendingCN120964070ACosmonautic vehiclesCosmonautic propulsion system apparatusCouplingHigh acceleration
The invention discloses a reaction coupling type momentum transfer propulsion system and method, and relates to the technical field of aerospace propulsion, and the reaction coupling type momentum transfer propulsion system comprises a double-momentum operation orbit, a synchronous deflection unit and a momentum conversion medium; the propelling method comprises the steps that the double tracks are unfolded, the momentum conversion medium is accurately accelerated through force equal in size and opposite in direction, counter-acting force is offset as much as possible, the double tracks synchronously deflect to the target direction to a preset angle after a certain speed is reached, the momentum conversion medium is decelerated to be relatively static, and the counter-acting force borne by the tracks in the process serves as propelling power; reverse synchronous acceleration and reverse synchronous deflection are adopted, counter-acting force is coupled and counteracted as far as possible to maintain system stability, pure electric energy is adopted for driving, no mass loss exists in the propelling process, and repeated propelling can be achieved, so that the higher acceleration upper limit is achieved. The method is suitable for medium-long distance space electromagnetic propulsion, deep sea equipment propulsion and other scenes.
Owner:王亮
A high-frequency and high-acceleration electric vibration test bench
The present invention discloses a high-frequency, high-acceleration electric vibration test bench. The magnetic field direction of the permanent magnet of the electric vibration test bench is arranged vertically. By arranging an upper magnetic ring (or a middle magnetic ring) to correspond to a central magnetic pole, a magnetic field air gap is formed between the upper magnetic ring (or the middle magnetic ring) and the central magnetic pole. Due to structural limitations of the bench body, the cross-sectional area S1 of the magnetic field air gap remains unchanged. However, the cross-sectional area Am of the permanent magnet can be increased by extending the length of the permanent magnet in the radial direction. According to the air gap magnetic induction intensity B=Br*Am / S1, the air gap magnetic induction intensity B can be effectively increased while maintaining the structure of the dynamic coil assembly of the vibration table. This can further improve the electromagnetic thrust of the vibration table, thereby meeting the test requirements of the vibration table for high frequency and high acceleration.
Owner:SUZHOU WEIBO TESTING INSTR CO LTD
Rocket-boosted rescue unmanned aerial vehicle and control method
The invention provides a rocket-boosted rescue unmanned aerial vehicle and a control method. The rocket-boosted rescue unmanned aerial vehicle comprises a cruising stage, an interstage section and a boosting stage, the cruising stage is provided with a folding telescopic wing and a turbojet engine; in the working process of the unmanned aerial vehicle, the boosting stage quickly sends the cruising stage to the high altitude and separates the cruising stage, then the cruising stage continuously ascends to cross the highest point, and after the folding telescopic wings of the cruising stage are unfolded to slide and the speed is reduced to a low speed, the folding telescopic wings stretch out and grow and start the turbojet engine to cruise. The high acceleration capacity of the rocket engine, the wide speed range adaptive capacity of the deformable wings and the long-time cruising capacity of the turbojet engine are integrally combined, and the time for the rescue unmanned aerial vehicle to arrive at the site is effectively shortened.
Owner:SHANGHAI INST OF ELECTROMECHANICAL ENG
Joint design method of variable acceleration factor k-space trajectories
The application discloses a variable acceleration factor k-space trajectory joint design method, and belongs to the field of magnetic resonance imaging. The method is used for k-space trajectory design of a multi-frame imaging sequence with echo chain readout. Firstly, a sampling mask of a low acceleration factor frame is determined, then the trajectory of each echo chain is designed according to the mask, the number of echo chains required to be collected by a high acceleration factor frame is determined, and then the trajectory of the corresponding number of echo chains of the low acceleration factor frame is taken as the trajectory of the echo chain of the high acceleration factor frame. The application can realize trajectory design of variable acceleration factor acquisition in multi-frame magnetic resonance imaging, ensure that there is no additional T2 contrast difference between different acceleration factor image frames, and thus the reconstructed image is consistent. As an automatic trajectory design scheme, the method is especially suitable for application in three-dimensional multi-frame magnetic resonance imaging.
Owner:ZHEJIANG UNIV
Large electric spark forming machine tool
The invention provides an electric spark forming machining tool, relates to the technical field of electric spark machining tools, and solves the problem of contradiction between high acceleration and high speed requirements and high rigidity and large torque requirements of a machine tool servo shaft for machining of narrow-groove narrow-slit and large-area molded surface molds. The device comprises an X-axis module, a Y-axis module, a Z-axis module and a W-axis module, the Y-axis module is arranged at the driving end of the X-axis module, the Z-axis module is arranged at the driving end of the Y-axis module, the W-axis module is arranged at the driving end of the Z-axis module, the driving direction of the Z-axis module is the same as that of the W-axis module, the Z-axis module comprises a speed reducing and torque increasing mechanism, and the W-axis module is of a motor direct-drive structure. The dynamic response characteristic of the W-axis module is higher than that of the Z-axis module. The dynamic response characteristic of the W-axis module is higher, the requirement for high-speed cutter lifting of narrow grooves and narrow slits can be met, and inertia matching with large moving parts is met through the Z-axis module.
Owner:ZHUHAI HERUI NEW TECH CO LTD
A method for wireless measurement of high-g accelerations during a crash process
PendingCN122283181ASolving Measurement ChallengesWireless measurement implementationWireless transmissionHigh acceleration
This invention belongs to the field of impact resistance technology and discloses a wireless measurement method for high g-value acceleration during a collision process. The method includes installing a sensor and supporting circuitry; installing a transmitter and transmitting antenna; overload-resistant potting reinforcement of the measurement module; configuring a wireless receiving device for impact data; and performing acceleration data analysis and processing. This method, by installing a high-overload-resistant wireless transmission measurement device on an experimental model, achieves wireless measurement of acceleration data during the collision process, solving the problem of measuring high g-value acceleration data in high-speed collisions, explosions, and other events. Utilizing wireless transmission, this method eliminates the need for retrieval of measurement and recording equipment, avoiding the problem of difficulty in installing signal transmission lines on high-speed moving objects. It is particularly suitable for situations where high collision velocities generate peak accelerations of tens of thousands of g, and wired data transmission is difficult, thus possessing practical engineering value.
Owner:CHINA AERODYNAMICS RES AND DEV CENT ULTRA-HIGH SPEED AERODYNAMICS RES INST
Automatic feeding manipulator for dish-washing machine inner container
The invention relates to the field of manipulators, in particular to an automatic feeding manipulator for dish-washing machine liners, which comprises a placing table for preliminarily placing the dish-washing machine liners, and a support frame is fixedly mounted on the outer side of the placing table; a fixed rail is fixedly installed at the top end of the supporting frame, a servo motor is fixedly installed on the outer end face of the fixed rail, the output end of the servo motor is connected with a lead screw through a coupler, and the two ends of the lead screw are installed in the fixed rail through bearings. According to the automatic feeding manipulator for the dish-washing machine inner container, the claw plate extends upwards from the interior of the air pipe, so that the effect of clamping the outer side of the dish-washing machine inner container placed on the top of the feeding claw is achieved; and meanwhile, the effect of preventing the inner container from generating relative displacement with the clamping jaw due to inertia force and finally generating inclination and collision due to too high acceleration of the feeding jaw in the feeding process of the inner container is achieved.
Owner:TAIZHOU HAOBANG SCI & TECH DEV CO LTD
Test device and test method for simulating aircraft wheel landing rotation friction
PendingCN120445887AAircraft components testingInvestigating abrasion/wear resistanceHigh accelerationStructural engineering
The invention provides a test device and a test method for simulating aircraft wheel landing rotation friction, the test device for simulating aircraft wheel landing rotation friction comprises a rigid plane, an accelerated rolling direction is arranged on the rigid plane, two sides of the accelerated rolling direction are respectively an initial side and a target side, and the test device further comprises a swing part, a rotating part and a driving part, and the first end of the swinging piece is hinged above the rigid plane. According to the test device for simulating aircraft wheel landing rotation friction, the ejection assembly is additionally arranged, an elastic piece in the ejection assembly can be used for being matched with a positioning piece to drive a swing piece to swing at high acceleration, and therefore the high-acceleration rolling behavior of a rolling wheel is stimulated; the image acquisition assembly is used for acquiring the deformation image of the roller surface in the test state and performing digital image correlation (DIC) analysis to obtain the deformation condition and the frictional wear characteristic of the roller surface, so that the dynamic instability phenomenon and the surface crease wear phenomenon possibly occurring in high-acceleration and strong-adhesion rolling contact can be conveniently explored.
Owner:SHANGHAI UNIV OF ENG SCI
Acceleration sensing chip, acceleration sensor and electronic equipment
The embodiment of the invention discloses an acceleration sensing chip, an acceleration sensor and electronic equipment, and relates to the technical field of mechano-electronics. The acceleration sensing chip comprises a mass block, a base, a cantilever, a first stop part and a second stop part. The base ring is arranged around the mass block. The cantilevers are connected to the two sides of the mass block in the first direction respectively and further connected with the base. In the second direction, a distance is formed between the cantilever and the mass center of the mass block. The plurality of first stop parts are respectively connected with the base and are respectively positioned on two sides of the mass block along the first direction; in the second direction, a part of the first stopping part is arranged above the mass block at intervals. The plurality of second stop parts are respectively connected to two sides of the mass block along the third direction; in the second direction, a part of the second stopping part is arranged above the base in a spaced mode. The first backstop part and the second backstop part are matched with the base, so that comprehensive backstop on impact in the Z direction, the X direction and the Y direction can be realized, and the comprehensive impact resistance and reliability of the acceleration sensing chip are improved.
Owner:HUAWEI TECH CO LTD
Dispensing device, automated analysis device, and dispensing method
An object of the present invention is to provide a dispensing device capable of preventing bubbles from jumping out of a nozzle and realizing highly accurate dispensing even though the nozzle is moved at a high speed toward a liquid level and is decelerated and stopped at a high acceleration. The dispensing device according to the present invention starts suction of a liquid in a period from when a nozzle starts to be lowered toward a liquid level of the liquid to when an end portion of the nozzle comes into contact with the liquid level of the liquid and the lowering of the nozzle is stopped (see FIG. 6).
Owner:HITACHI HIGH TECH CORP
Drop hammer impact testing machine based on electromagnetic driving and resetting and control method thereof
The invention relates to the technical field of drop hammer impact testing machines, in particular to a drop hammer impact testing machine based on electromagnetic driving and resetting and a control method thereof, and the drop hammer impact testing machine comprises a rack and guiding system, an electromagnetic acceleration system, an electromagnetic lifting and resetting system, a measurement and control system and a safety protection system. Non-contact electromagnetic acceleration is achieved, the fatigue problem of a mechanical spring is thoroughly solved, and an acceleration mode with high acceleration, high repeatability and infinite service life is achieved. Through feedback closed-loop control of the multistage coils, any preset impact speed can be accurately and repeatedly realized. Acceleration, measurement, reset and circulation control are integrated, and full-automatic impact testing of one-button operation is achieved. And the equipment adaptability and maintainability are enhanced through the modular design. The safety protection system guarantees the stability of the test process. The technical problems that a traditional drop hammer testing machine is low in acceleration capacity, large in part loss, uncontrollable in impact speed range and low in reliability can be solved.
Owner:CHANGJIANG SURVEY PLANNING DESIGN & RES CO LTD +1
Linear motor
The present invention provides a linear motor that provides sufficient thrust even with a single motor, enables high acceleration / deceleration and long stroke operations, and allows for ultra-precise positioning control. [Solution] The system has an armature unit in which multiple magnetic circuits composed of multiple armatures are arranged in the direction of movement, and a permanent magnet unit composed of multiple permanent magnets. By arranging the armatures on both sides of the permanent magnet at the same distance, the magnitude of the magnetic attractive force acting between one end of the permanent magnet and the armature is equal to the magnitude of the magnetic attractive force acting between the other end and the armature, and the direction in which these forces act is opposite. As a result, the overall magnetic attractive force generated between the permanent magnet and the armature becomes almost zero, reducing the disturbance force and cogging force on the thrust. Furthermore, by connecting some of the armature windings to different servo amplifiers, high acceleration / deceleration and ultra-precise positioning operations can be performed with a single linear motor depending on the combination of the number of windings, the current capacity of the servo amplifier, and the current control.
Owner:柴田均
Damping adaptive structure and control method of acceleration sensor
ActiveCN116008592BAcceleration measurement using interia forcesSpeed/acceleration/shock instrument detailsStable statusHigh acceleration
The application relates to a damping self-adaptive structure and control method of an acceleration sensor, belonging to the technical field of fuzes. Two opposite electrode plates are additionally arranged between a mass block of the acceleration sensor and a lower supporting silicon base to realize the effect of variable damping. When the output of the sensor is greater than a trigger threshold value, a certain current is passed through the electrode plates to generate an acting force between the two electrode plates, thereby generating damping for limiting the movement of the sensor, enabling the acceleration sensor to return to the initial stable state more quickly and reducing the oscillation time; when the output of the sensor is less than a termination threshold value, it is determined that the sensor has returned to the initial stable state, the feedback control is turned off, the acting force between the two electrode plates disappears, and the sensor normally works again. The application is suitable for the field of acceleration sensors, enables the acceleration sensor to have better dynamic performance, can return to a stable value more quickly when subjected to a pulse signal, increases the detectable bandwidth of the sensor, and improves the controllability of the damping self-adaptive structure of the acceleration sensor.
Owner:BEIJING INST OF TECH
Acceleration amplification device based on lever amplification principle
ActiveCN224190050USpeed/acceleration/shock instrument detailsVibration accelerationHigh acceleration
The utility model discloses an acceleration amplification device based on a lever amplification principle, and relates to the technical field of acceleration amplification devices. Comprising a cross beam, a first support, a second support, a connecting piece, a first flexible hinge and a second flexible hinge, the cross beam is a variable cross-section rigid beam, the measuring sensor is installed at the tail end of one end of the cross beam, the first flexible hinge and the second flexible hinge are both fixedly connected with the cross beam, the first flexible hinge is further fixedly connected with the connecting piece, the connecting piece is detachably connected with the second support, the second flexible hinge is further fixedly connected with the first support, and the first support is fixedly connected with the vibration table. The second flexible hinge is located between the first flexible hinge and the vibration sensor, and the distance between the first flexible hinge and the second flexible hinge is smaller than the distance between the second flexible hinge and the vibration sensor. According to the utility model, the conventional vibration acceleration can be amplified without being influenced by the installation times and the load, and the calibration of the vibration sensor during high-acceleration vibration is completed.
Owner:METROLOGY & MEASUREMENT CENT OF CHINA ACADEMY OF ENG PHYSICS
Armature structure of coil type electromagnetic launching flying net capturing unmanned aerial vehicle
The invention provides an armature structure of a coil type electromagnetic launching flying net capturing unmanned aerial vehicle, and belongs to the technical field of electromagnetic launching and unmanned aerial vehicle prevention and control. The armature adopts a cylindrical high-strength engineering plastic shell, grooves which are uniformly distributed in the circumferential direction are formed in the end face, corresponding axial long grooves are formed in the side face and used for containing iron steel columns, high-strength compression springs are symmetrically arranged in the armature and provide power for bouncing off of the steel columns, and the steel columns are connected with a light high-strength fiber flying net through connecting ropes. When the armature is in the gun barrel, the inner wall of the gun barrel forms natural radial constraint on the steel column, the spring drives the steel column to pop off synchronously after the armature is ejected out of the gun barrel, and the flying net is pulled to be uniformly unfolded to form a circular catching net surface. The technical problems that an existing armature cannot be matched with a coil gun, a flying net is unevenly unfolded, an all-metal structure is prone to electromagnetic short circuit and large in weight, and a limiting structure is tedious and prone to clamping stagnation are solved. The electromagnetic armature has the advantages of being matched with the coil gun, efficient in acceleration, even in flying net unfolding, simple in structure, light, insulated and stable in launching.
Owner:NANJING VOCATIONAL UNIV OF IND TECH
A large hybrid high-speed five-axis machining center
The present invention discloses a large-scale hybrid high-speed five-axis machining center, comprising: a machining center body, the machining center body including a machine tool base, a C-axis rotary table, a Z-axis slide mechanism, an X-axis dual-drive pendulum mechanism 4, a Y-axis single-drive pendulum mechanism, an A-axis power head, and a B-axis power head. The operator installs and fixes the structural parts on the C-axis rotary table, and the Y-axis single-drive pendulum mechanism on the X-axis dual-drive pendulum mechanism can drive the A-axis power head to move on the Y-axis, and then the A-axis power head can drive the B-axis power head installed inside it to move. The five-axis machining center is suitable for the processing of aluminum parts such as automotive battery boxes and die-cast floors. The five-axis machining occupies a small area and can achieve extremely high acceleration and rapid movement speeds. The spatial angles of the X, Y, and Z axes can realize polar coordinate interpolation functions. The five-axis machining center has the functions of drilling, milling, tapping, etc. for processing horizontal and vertical planes.
Owner:JIANGSU HENGLI MACHINE TOOL
Independent double-station linear module
The application relates to the technical field of linear module, in particular to an independent double-station linear module. The technical scheme comprises a bottom plate and a linear module main body, the linear module main body comprises a linear module body and a mover slide base, the linear module body is used for driving the mover slide base to move along the length direction, airflow plate bodies are fixed on the two sides of the mover slide base through fasteners, flow channels are arranged on the airflow plate bodies, horizontal airflow is generated when the airflow plate bodies move, the horizontal airflow is vertically sprayed through the flow channels to generate lift on the airflow plate bodies, and the mover slide base reduces the friction with the linear module body through the lift. According to the characteristics of high acceleration of the linear module, high-speed airflow is generated, the airflow is vertically sprayed through the flow channels to apply the lift on the airflow plate bodies, the airflow plate bodies and the mover slide base are lifted through the lift, the friction between the mover slide base and the linear module body can be reduced, and the service life of the linear module is prolonged.
Owner:DONGGUAN SHIDATONG AUTOMATION CO LTD
Three-axis motion platform and plane driving device
Owner:JIANGSU JITRI SIOUX TECH CO LTD
Electromagnetic shock absorber test bed and control method thereof
The invention belongs to the technical field of shock absorber detection equipment, and particularly relates to an electromagnetic shock absorber test bed and a control method thereof, and the electromagnetic shock absorber test bed comprises a bottom plate, guide columns, a lifting locking cross beam, a second driving cylinder, an electromagnetic driving mechanism, a static load supporting mechanism, a cooling structure and a control module; the electromagnetic driving mechanism drives the coil connecting piece and the actuating rod to apply accurate pressure to the shock absorber by controlling the magnitude and the direction of the current of the motor coil; the control module comprises two drivers, the four motor coil units are synchronously controlled by the two drivers, and one driver synchronously controls the two motor coil units; the two drivers are controlled by one driver control unit. The invention has the advantages of high precision, high speed, high acceleration, high dynamic performance, less wear movement, low noise, low operation cost, high control response, small overshoot, short steady state entering time and the like; electric energy direct drive is adopted, process energy conversion is not needed, and the equipment is high in efficiency, high in reliability, energy-saving and environment-friendly.
Owner:BBK TEST SYST CO LTD
Absolute calibration device and method for acceleration sensor under ultrahigh acceleration condition
PendingCN121276093ATesting/calibration of speed/acceleration/shock measurement devicesAbsolute calibrationHigh acceleration
The invention discloses an absolute calibration device and method for an acceleration sensor under an ultra-high acceleration condition, and the device is characterized in that a loading force value and carrier mass are known values, namely, under the condition that an acceleration value is known, an unloading stress impact method is used for enabling a stand column bearing the carrier mass to generate rebound stress; the carrier with the acceleration sensor is impacted to generate high-frequency and high-acceleration motion, and the voltage output response of the sensor is measured, so that the amplitude-frequency characteristic of the acceleration sensor under the high-frequency and high-acceleration condition is obtained. When the cross spring bears the carrier mass block, the unloading force is changed into the vibration force of the spring, and a response value of low-frequency excitation in the sensor can be generated. The acceleration sensor is a double-second-order oscillation system, and the sensitivity is a function of the carrier mass, the rigid connection strength and the sensor installation direction, so that the influence degree of the parameters can be measured through structure adjustment, and ideal calibration that the vibration mass block in the acceleration sensor is only acted by acceleration force can be realized; the technology cannot be realized in the prior art.
Owner:方继明
Optical fiber acceleration sensor based on F-P interference principle
The utility model discloses an optical fiber acceleration sensor based on an F-P interference principle, relates to an optical fiber acceleration sensor, and aims to solve the problems of low sensitivity and poor measurement precision of the existing mechanical acceleration based on simple harmonic vibration. The base is provided with a mounting cavity; the sensing unit comprises an elastic membrane and a mass block; the outer edge of the elastic membrane is clamped in the mounting cavity of the base through the upper cover; the mass block is fixed in the center of the elastic membrane; a fixing through hole is formed in the upper cover; one end of the single-mode optical fiber penetrates into the mounting cavity of the base through the fixing through hole of the upper cover, the penetrating end of the single-mode optical fiber and the mass block are oppositely arranged, the surface of the mass block and the end face of the penetrating end of the single-mode optical fiber serve as two reflecting faces respectively, and an F-P interference cavity is formed by the space between the two reflecting faces. The beneficial effects are that the sensor is high in acceleration measurement sensitivity, and the measurement precision of acceleration measurement is improved.
Owner:HEILONGJIANG UNIV
Triboelectricity speed and displacement sensor for switch contact detection
The invention provides a triboelectric speed and displacement sensor for switch contact detection, and the sensor comprises a vibrator slidably disposed on a power shaft, a displacement pad disposed at the rear end of the power shaft, a first buffer assembly connected between a moving contact and the vibrator, a second buffer assembly connected between the vibrator and the displacement pad, and a friction layer tube. The power shaft is slidably sleeved with the friction layer pipe, and the outer surfaces of the vibrator and the displacement pad make contact with the inner surface of the friction layer pipe. A friction layer of a cross structure is arranged on the inner surface of the friction layer pipe, and cross electrodes are arranged on the outer surface of the vibrator and the outer surface of the displacement pad. According to the invention, the structure of the switch contact is optimized, the spring is added for damping, signal frequency loss of the switch contact caused by high acceleration and millimeter-level amplitude vibration is avoided, and the displacement measurement precision is remarkably improved; meanwhile, accurate measurement of the instantaneous rate is realized by combining the vibration frequency change of the spring, and real-time and accurate detection of the motion state of the vacuum circuit breaker contact is realized.
Owner:HENAN AGRICULTURAL UNIVERSITY +1
A vehicle control method and related products
This application discloses a vehicle control method and related products. The method includes: obtaining the operating status of the vehicle's traction system while the vehicle is stationary and experiencing a power loss condition; determining, based on the traction system's operating status, whether the traction system meets the conditions for entering a high acceleration mode; and controlling the traction system to operate in high acceleration mode in response to a triggering operation to enter high acceleration mode. In this manner, when the traction system meets the conditions for entering high acceleration mode, the high acceleration mode allows the vehicle to increase its traction capacity in a short period of time, enabling normal operation on long and steep slopes in the event of a power loss, preventing the vehicle from being stopped on long and steep slopes and thus reducing operational risks.
Owner:CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
A dynamic test high-precision high-acceleration testing machine
The utility model discloses a high precision type high acceleration testing machine with dynamic test, including host body, the host body's front end position department is installed with the test cabin door, the host body's front end is provided with the recess at the below position department, the host body's front end below position department is installed with the mesh plate, the mesh plate is inserted to the opening position department of host body front end below position department when installing this device, first the convex block is connected in the inside position department of recess when installing, make the position of mesh plate be limited, make first gear shaft rotate to rotate knob, and first gear shaft passes through the gear structure at the outside wall position department, drives the upper insertion column and lower insertion column of both sides position department, moves respectively to the above and below, makes insertion column insert to the inside position department of insertion hole, thereby completes the installation to mesh plate, through this installation, can be completed quickly when disassembling and installing, and need not borrow the tool.
Owner:SUZHOU NISHUOKU ELECTRONIC TECH CO LTD