144 results about "High acceleration" patented technology

The invention discloses an acceleration signal processing method, device and equipment for measurement while drilling and a medium. The method comprises the following steps: processing an acceleration signal by using two alternating filters to obtain two alternating filtering results; carrying out weighted summation on the two alternative filtering results by adopting a first weight and a second weight to obtain a weighted summation result; and performing adaptive adjustment on the first weight and the second weight based on the weighted summation result and an optimization target so as to obtain an optimized weighted summation result based on the optimized first weight and the optimized second weight after adaptive adjustment, and taking the optimized weighted summation result as a processing result of the acceleration signal. Accuracy and stability of acceleration signal processing results can be improved, noise components can be reduced, measurement precision of well track parameters such as well deviation can be improved, the drilling direction can be accurately fed back and adjusted, and the drilling rate of high-quality reservoirs can be effectively guaranteed.

The invention provides an aluminum alloy, a preparation method of the aluminum alloy and a motor rotor, the aluminum alloy comprises the following components in percentage by mass: 0.38-0.60% of Si, not more than 0.15% of Fe, not more than 0.05% of Cu, not more than 0.05% of Zn, 0.005-0.01% of Ti, not more than 0.03% of Ga, 0.01-0.1% of Sm, 0.005-0.05% of Er, 0.5-0.8% of Mg and the balance of Al and other elements, the total amount of the other elements is less than 0.1%, and the single content of the other elements is less than 0.01%. According to the aluminum alloy provided by the invention, the high-temperature yield strength of the aluminum alloy can be improved on the premise of keeping good conductivity through reasonable proportioning of all the element components, and when the aluminum alloy is used for preparing the motor rotor of the electric vehicle, the obtained motor rotor can run for a long time under the conditions of high rotating speed and high acceleration and is not prone to deformation or failure.

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.

The invention discloses an acceleration sensor and a preparation method thereof, and belongs to the technical field of semiconductors. The acceleration sensor comprises a base body, four induction resistors and four mass blocks, the two input ends are electrically connected with the four induction resistors to form an equivalent circuit, when acceleration is provided in the detected direction, the four induction resistors can generate resistance changes under the acting force of the mass blocks, and the acceleration is detected. The acceleration can be detected by measuring the voltage change condition of the two output ends in the equivalent circuit. According to the embodiment of the invention, the four induction resistors are electrically connected to form a circuit structure to calculate the acceleration, so that the influence of other environmental factors on a calculation result can be avoided, and the accuracy of the calculation result is improved. Moreover, the four inductive resistors are all high-electron-mobility transistors, the piezoresistive coefficient is large, the sensitivity is high, and the acceleration sensor has high reliability in low-temperature and high-temperature environments, so that the sensitivity and reliability of the acceleration sensor can be improved.

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.

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.

The invention belongs to the technical field of impact tests, and discloses a tension-shear combined quick-response pressure relief device which comprises an ultrahigh-pressure gas generator, a shear ring, an emitter and an emission cylinder. One end of the pull rod is connected to the tail end of the emitter, the other end of the pull rod penetrates through the end face, away from the emitter, of the ultrahigh pressure gas generator and is connected with the pneumatic tension regulator, and a force measuring device is arranged on the pull rod and used for detecting the real-time working tension of the pull rod. The pneumatic tension regulator controls the working tension of the pull rod to be smaller than the ultimate breaking force of the pull rod all the time through differential pressure regulation; the working tension of the pull rod is larger than the difference between the limit shearing force upper limit and the limit shearing force lower limit of the shearing ring, the shearing ring and the pull rod jointly act on the emitter, and movement of the emitter is limited before the emitter is emitted. The invention further provides a control method. The device and the method are suitable for ultrahigh-pressure and ultrahigh-speed acceleration and can accurately control the pressure release process so as to accurately control the launching process.

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.

An acceleration sensor (100), comprising a frame (110), a mass block (180), elastic beams (130) and varistors (140). The frame (110) has an inner space; the mass block (180) is located in the inner space; each elastic beam (130) comprises at least a first elastic section and a second elastic section, which are connected end to end, the first elastic section being arranged at an angle to the second elastic section; one end of each elastic beam (130) is fixed on the frame (110), and the other end of the elastic beam (130) is fixed to the mass block (180); and several varistors (140) are arranged on the elastic beams (130), and are grouped to form three Wheatstone bridge circuits (161, 162, 163). The elastic beams (130) are bent in multiple sections, such that the plane utilization rate is greater; the arrangement of the varistors (140) realizes the measurement of triaxial acceleration by means of the single mass block; and after the several varistors (140) are arranged on the elastic beams (130), the several varistors (140) are prone to being located in a stress concentration area, such that a corresponding relationship between a resistance value change of the varistors (140) due to stress and an acceleration change of the mass block (180) is more precise, thereby improving the sensitivity and precision of the acceleration sensor (100).

A photolithography system with an actuatable reticle stage is disclosed. Mechanical actuators coupled to a long-stroke reticle stage are driven to extend and mechanically contact a short-stroke stage during reticle stage turnaround. The actuators may be piezoelectric stack pushers or pneumatic bellows pushers. The pusher devices are controlled and driven to enable higher acceleration turnaround trajectories by applying forces via mechanical contact engaging during turnaround and disengaging before exposure begins during a scan.

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.

To provide a system and a program and the like capable of reducing a load of verifying an abnormal condition.SOLUTION: A system is provided with control means having a function of recording an image at a lower frequency than when a predetermined or higher acceleration occurs, by satisfying the other conditions in addition to the occurrence of a predetermined or higher acceleration, by satisfying a plurality of conditions other than the occurrence of the predetermined or higher acceleration, and by satisfying a single condition different from the occurrence of the predetermined or higher acceleration. The recorded image is transmitted to the outside and helps to verify abnormal situations such as accidents.SELECTED DRAWING: Figure 3

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

A vehicle behavior control apparatus includes: a variable roll stiffness device configured to change roll stiffness of a first axle being one of a front axle and a rear axle and roll stiffness of a second axle being another of the front axle and the rear axle; and a controller. The controller is configured to control the variable roll stiffness device so as to increase the roll stiffness of the first axle in accordance with a lateral acceleration in at least a low acceleration range. The controller is also configured to execute a control process of controlling the variable roll stiffness device so as to increase the roll stiffness of the second axle when the lateral acceleration increases to a high acceleration range beyond the low acceleration range, or a vehicle stability control for reducing at least one of oversteer and understeer of the vehicle is abnormal.

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).

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.

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.

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.

The invention discloses a lightweight helical-tooth double-tooth-difference transmission rapid telescopic pallet fork device, and belongs to the technical field of intelligent logistics equipment. A rolling bevel gear of the light-weight middle fork is synchronously meshed with a left helical rack and a right helical rack of the bottom fork and a left helical rack and a right helical rack of the light-weight front fork at the same time to form helical-tooth double-tooth-difference transmission, the light-weight front fork and the light-weight middle fork are driven to stretch out and draw back stably at high speed and high acceleration at double differential speed, and shifting rod mechanisms driven by motors are arranged at the two ends of the light-weight front fork. A synchronous belt rack of the driving assembly is meshed with a transmission rack at the bottom of the light-weight middle fork to drive the light-weight middle fork to move, and power is provided for the light-weight helical-tooth double-tooth-difference rapid telescopic pallet fork device. The telescopic movement of the light-weight middle fork and the light-weight front fork and the goods storing and taking process are achieved in a rolling guide rail and double-tooth-difference transmission mode. The device has the characteristics of simple structure, high-speed and high-acceleration response, small start-stop impact, light weight, stability, reliability, high use flexibility and the like.

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.

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.