1385 results about "Cantilevered beam" patented technology

A method of making an acoustic sensor includes forming or providing a mold having one or more grooves extending in a direction of the length of the mold to a distal end of the mold. The method also includes forming or depositing a structure having one or more piezoelectric layers over the top surface of the mold to define a beam with a proximal portion and a distal portion, the distal portion having a corrugated section including one or more grooves that correspond to the one or more grooves of the mold. The method also includes forming or applying an electrode to the proximal portion of the structure and releasing the structure from the mold to form one or more cantilever beams. The corrugated section inhibits bending of the corrugated section along the length of the distal portion of the structure when the acoustic sensor is subjected to sound pressure.

The invention discloses a calculation and measurement fused high-fidelity digital twinning dynamic monitoring method for a cantilever beam structure. Firstly, a real-time updated database is constructed based on a physical entity system; secondly, constructing a three-dimensional digital model by using SolidWorks, and performing multi-physics field simulation analysis in combination with Ansys to obtain high-precision mechanism data of a structural key area; thirdly, performing reduced-order calculation on a simulation result by using MWorks, training and optimizing a reduced-order model through a feedforward neural network, and reducing an error between simulation data and reduced-order data; fusing the one-dimensional system data order reduction model and the three-dimensional field data order reduction model based on a Modelica language; and finally, integrating a mechanism-data hybrid model, constructing a dynamic response characteristic and spatial distribution characteristic integrated high-fidelity digital twinborn body, comparing twinborn body calculation data with sensor actual measurement data in real time, and accurately representing geometric morphology, mechanical properties and dynamic behaviors of a physical system. The method is suitable for high-precision monitoring, real-time state evaluation and performance optimization of the cantilever beam structure.

The invention discloses a bionic TENG sensor unit for an artificial throat and a preparation method thereof, and relates to the field of artificial throats, and the sensor unit comprises a gradient micro-dome friction layer, a strain amplification layer, an electrode layer and a back cavity substrate layer. The gradient micro-dome array realizes gradual contact through gradient change of height and diameter; the strain amplification layer converts vertical vibration into horizontal strain by using a cantilever beam-sliding block structure; the back cavity array selectively amplifies vibration at a specific frequency based on the Helmholtz resonance principle. The invention further provides a corresponding preparation method. The preparation method comprises the steps of back cavity forming, electrode deposition, microstructure manufacturing, surface treatment and the like. The sensor has the advantages of high sensitivity, good frequency selectivity and strong durability, and is particularly suitable for detecting weak laryngeal vibration signals of laryngeal patients.

The embodiment of the invention provides a wafer testing device and testing method, and belongs to the technical field of wafer testing. The wafer testing device comprises an MEMS probe chip installed and connected on a testing machine, and a testing position used for fixing a tested chip. A test contact of a probe of the MEMS probe chip is in contact with a PAD of a tested chip during testing, and the MEMS probe chip is used for collecting a detection signal of the tested chip; wherein a probe of the MEMS probe chip is integrated in the MEMS probe chip based on a cantilever beam type; and the test machine is used for generating a test result corresponding to the tested chip based on the detection signal of the tested chip. The MEMS probe chip in the scheme of the invention adopts a modular design, is convenient to quickly replace, reduces the maintenance cost and time, and provides a better solution for the test requirements of high-frequency and high-density packaged chips.

The invention provides a crystal oscillator and an atomic clock, and relates to the technical field of oscillators, the crystal oscillator comprises a packaging cavity, a crystal, a temperature sensor and a cantilever beam assembly, the crystal, the temperature sensor and the cantilever beam assembly are arranged in a containing cavity of the packaging cavity, and the packaging cavity is of a vacuum packaging structure. The crystal and the temperature sensor are arranged on the cantilever beam assembly, the crystal and the temperature sensor are electrically connected with different connection points of the packaging cavity through the cantilever beam assembly, and the temperature sensor is arranged around the crystal; the cantilever beam assembly comprises a heating module, and when the temperature sensor monitors that the temperature of the area where the crystal is located is smaller than a preset temperature threshold value, the heating module heats the crystal. The energy loss of air damping to the high-frequency vibration of the crystal is eliminated, the Q value is improved, and the phase noise suppression capability is enhanced; accurate control over the temperature of the area where the crystal is located is achieved, the thermal response speed and the temperature control precision are improved, and the problem that an existing crystal oscillator is poor in stability is solved.

The invention discloses a low-power-consumption photonic integrated device preparation method and a corresponding device, and relates to the technical field of semiconductor optoelectronic integrated devices.The device comprises a substrate, a cantilever beam type grating layer, two gain layers, two modulator layers, a wrapping layer and an electric contact layer, the two gain layers and the two modulator layers are symmetrically distributed, and the wrapping layer and the electric contact layer form a shallow ridge waveguide structure. The two symmetrically-distributed gain layers and the middle cantilever beam type grating layer jointly form a double-end resonant cavity structure, the structure shares a unified grating and a thermal tuning platform to achieve continuous, synchronous and high-precision control over cavity mode wavelengths, and balanced modulation and phase synchronization of double-end output are achieved in cooperation with the symmetrically-integrated high-speed modulator layers on the two sides. According to the technical scheme, the gain layer, the grating layer and the modulator layer are symmetrically integrated on the same substrate, the alignment error of a multi-cavity structure is reduced, synchronous scanning, low drift and strong anti-interference high-quality laser output can be obtained, meanwhile, efficient thermal tuning is conducted through the cantilever beam type grating layer, and power consumption is remarkably reduced.

A power transmission line vibration energy collection device based on a triboelectricity-electromagnetic effect belongs to the technical field of power transmission line self-powered equipment, and comprises a shell, a wire clamp device, a triboelectricity unit, a vibrator structure and a cantilever beam structure, and can collect multi-frequency and multi-amplitude vibration energy of a power transmission line in the vertical direction. And the cantilever beam-magnetic coupling structure is adopted to improve the low-order modal frequency, so that the vibration frequency response range of the self-powered device is widened, and the self-powered device has the following advantages that 1, efficient low-frequency energy collection is realized, and the vibrator structure can effectively collect low-frequency vibration energy by virtue of the gravity of the vibrator structure and the action of the supporting spring; 2, the fatigue resistance is excellent, and the cantilever beam does not directly participate in excitation of the triboelectric energy harvesting unit, so that the risk of fatigue fracture of the cantilever beam is effectively reduced; and 3, the energy collection capability of the device is improved, and friction electricity energy harvesting and electromagnetic energy harvesting are combined, so that the collection efficiency of high-frequency excitation energy can be further improved.

The invention relates to the technical field of soil pressure sensors, and discloses a lever structure-based soil pressure sensor, which comprises a shell, a bearing plate, a constant-strength cantilever beam, a force transmission lever and a measurement optical fiber, and is characterized in that the shell is internally provided with a containing cavity with an upward opening, the bearing plate is arranged at the top of the shell, and one end of the constant-strength cantilever beam is arranged on the side wall of the containing cavity; the force transmission lever is rotationally arranged in the accommodating cavity, and the measuring optical fiber is arranged at the bottom of the equal-strength cantilever beam; the equal-strength cantilever beam guarantees equal strain in the axial direction, micro deformation of the force bearing plate is amplified and transmitted to the equal-strength cantilever beam through the force transmission lever, deformation is converted into optical signals through the measuring optical fiber, and an anti-electromagnetic interference optical fiber measuring mode and an external collecting and demodulating technology are combined. Not only is small-size design and high sensitivity realized, but also interference on the original structure and stress distribution of the soil body is reduced, and the measurement precision in a complex rock-soil environment is improved.

The utility model discloses a cantilever beam impact testing machine, and relates to the technical field of testing machines. The cantilever beam impact testing machine comprises a testing machine base, a cantilever beam body is fixedly connected to the testing machine base, an electric push rod is arranged on the cantilever beam body, an impact head is arranged at the output end of the electric push rod, and a positioning mechanism used for limiting a test sample is arranged above the testing machine base. The positioning mechanism comprises a positioning seat fixedly connected to the testing machine base, and the positioning seat is provided with a clamping assembly and an impact positioning assembly. According to the cantilever beam impact testing machine, through the design of the positioning mechanism, during operation, the position of the impact positioning assembly is firstly adjusted, so that the impact width position of a test sample is quickly clamped to form positioning, then the test sample is clamped and positioned by utilizing the clamping assembly, and the toughness of the test sample is quickly tested; the test sample can be conveniently and quickly positioned, and the operation process is time-saving and labor-saving.

The invention discloses a PT symmetrical hot-pressing resistance MEMS wind speed and wind direction sensor. The sensor comprises four groups of PT symmetrical MEMS resonators which are orthogonally distributed and have hot-pressing resistance feedback; the PT symmetrical MEMS resonator comprises two cantilever beam resonators with completely same structures, a coupling spring beam connected with the two resonators, and a constant current source connected with one resonator, each cantilever resonator comprises two anchor areas, a wide beam connected with the anchor areas, a narrow beam with a piezoresistive effect, a warped thin plate structure and external electrodes located on the two sides of the thin plate structure. Wind speed and wind direction signals are converted into rigidity change of the resonator array through mechanical action by means of a warped thin plate structure, and the rigidity change enables the PT symmetrical MEMS system to deviate from an EP point, so that system frequency splitting is caused. As the frequency splitting quantity of the PT symmetric system is in direct proportion to the square root of the disturbance quantity, the wind speed and direction sensor can detect tiny wind speed signals, and has the advantages of very high sensitivity, simple process, high integration level and the like.

The utility model discloses a static calibration and calibration platform for a precise six-dimensional force sensor. The static calibration and calibration platform comprises a detection platform, and a calibration clamping table, a calibration and calibration module and a plurality of counterweight modules which are arranged on the detection platform. And the counterweight modules are respectively arranged at the calibration ends of the calibration module. The calibration module comprises a force loading tool, an X-axis force calibration assembly, a Y-axis force calibration assembly and a Z-axis force calibration assembly. The force loading tool is fixed on the top of the tested six-dimensional force sensor. The force loading tool comprises a sensor chuck and a cantilever beam frame fixed on the sensor chuck. According to the utility model, the force loading tool is matched with the steel cables and the counterweight modules in multiple directions to form a multi-direction and multi-dimensional force-torque system calibration system, the design is precise, the structure is simple and easy to realize, a worker can quickly complete the installation and detection calibration of the detected six-dimensional force sensor, the detection precision is ensured, and the detection efficiency is improved. The device structure is simplified and the device cost is reduced.

The invention discloses a height-level adjustable eddy-current type edge sensor probe, which comprises a transmitting end cantilever beam, a receiving end cantilever beam and an eddy-current type sensor, and is characterized in that a receiving unit of the eddy-current type sensor is fixedly arranged on the top surface of the cantilever end of the receiving end cantilever beam; a transmitting unit of the eddy current type sensor is fixedly arranged on the bottom surface of the cantilever end of the transmitting end cantilever beam and is parallel to a receiving unit; a height adjusting disc is arranged at the bottom of the transmitting end cantilever beam, and the bottom face of the transmitting end cantilever beam is connected with the top face of the height adjusting disc through a BV structure with a multi-stage height adjusting function. A BV structure is adopted between the transmitting end cantilever beam and the height adjusting disc to achieve accurate positioning and restraining of the transmitting end cantilever beam, rapid and accurate debugging and fine adjustment of the vertical height of the transmitting end cantilever beam are achieved, therefore, compensation is conducted on relative position changes, generated by environmental factors, of the detection end of the eddy current inductor, adjustment operation is convenient, and the adjustment precision is high. And the working stability of the eddy current sensor can be ensured after adjustment.

The invention provides a packaging structure, an optical module and an optical system, the packaging structure comprises an optical fiber unit and a chip unit, the chip unit comprises a photon chip and a chip cover plate, the photon chip is buckled with the chip cover plate, a spot size converter is arranged in the photon chip, and the spot size converter is composed of a cantilever beam waveguide and a first groove; the optical fiber unit comprises an optical fiber, a bottom plate and an optical fiber cover plate bottom plate; the waveguide is coupled with the optical fiber; wherein a first bonding part is arranged between the chip cover plate and the bottom plate, and a second bonding part is arranged between the photon chip and the optical fiber cover plate; or a first bonding part is arranged between the chip cover plate and the optical fiber cover plate, and a second bonding part is arranged between the photon chip and the bottom plate. In the packaging structure, a chip cover plate is arranged on a photon chip to form a chip unit, so that the bonding area between the chip unit and an optical fiber array is increased, the mechanical stability of the packaging structure is improved, and alignment of waveguides in the photon chip and optical fibers in the optical fiber array is realized.

The present application discloses a method for measuring impact force of debris flow and application, and a design method for barrier energy dissipation pile array. The method for measuring vertical impact force of debris flow measures the tangential velocity of debris flow at the impact point to measure the vertical impact force distribution of debris flow on the impact point. Further, the design method for pile array simplifies the free section of energy dissipation pile as a cantilever beam, which generates a bending resistance when impacted by debris flow, and the bending resistance continuously works to dissipate the impact kinetic energy of debris flow. According to the motion characteristics of debris flow, the impact time and distance parameters are further derived to solve the problems of measuring and designing the stability parameters of single energy dissipation pile, the energy dissipation parameters of barrier energy dissipation pile array, and the number parameters of barrier energy dissipation pile array. The present application also provides the application of each measuring and designing method. The present application provides a more scientific and perfect solution for the energy dissipation design of barrier energy dissipation pile array to resist the impact damage of rockfall and debris flow caused by landslide disaster.

The invention belongs to the technical field of engineering geological disaster monitoring, and discloses a fiber bragg grating angle type three-way joint meter based on an equal-strength beam theory. The fiber bragg grating angle type three-way joint meter is mainly composed of a guide rail type shell, a connecting rod, a beam fixing connecting piece, a positioning fixing piece, a constant-strength cantilever beam, a guide steel ball and an optical fiber sensing unit. Through an integrated fiber grating sensing technology, the joint meter can accurately measure displacement changes of a crack in three directions of opening and closing, shearing and settling. According to the design, the deformation characteristic of the hyperelastic equal-strength beam is fully utilized, the precision and response speed of crack monitoring are remarkably improved, it is ensured that efficient and accurate crack displacement monitoring can be achieved in various complex structures, and wide application potential and excellent monitoring performance are achieved.

The invention discloses a probe structure of an eddy current type edge sensor, which comprises an eddy current type sensor, a first clamping mechanism fixedly arranged on the back surface of a first sub-mirror, a second clamping mechanism fixedly arranged on the back surface of a second sub-mirror adjacently connected with the first sub-mirror, and a U-shaped notch structure with one end, close to the second clamping mechanism, of a U-shaped block, a cantilever beam is clamped on the second clamping mechanism, the cantilever end of the cantilever beam is inserted into the notch structure, and detection components of the eddy current type sensor are fixedly arranged on the cantilever end and the upper surface and the lower surface of the notch structure respectively. The probe structure shows excellent stability under specified environmental conditions, drifting among the sensors is kept within a small range, and the probe structure has high reliability and performance consistency under temperature change and humidity fluctuation.

The invention discloses a piezoelectric air cooling device based on a piezoelectric film PZT technology, and relates to the technical field of MEMS. The device adopts a two-layer packaging structure of a piezoelectric cantilever beam MEMS chip and a PCB (Printed Circuit Board) with a vent hole. A cantilever beam of the MEMS chip is integrated with an SOI top silicon layer and an ultrathin PZT driving stack, low rigidity and high driving force are achieved, and the surface of the cantilever beam is covered with a PDMS flexible sealing layer to achieve dynamic sealing. When the device works, the cantilever beam is driven to resonate in an ultrasonic frequency band, and efficient synthetic jet is generated at the vent hole by periodically changing the volume of the pump cavity. The technical bottleneck that miniaturization and high performance are difficult to consider at the same time is broken through, and the device has the advantages of being compact in structure, mute and efficient and is suitable for precise heat dissipation of miniature electronic equipment.

The invention discloses a piezoelectric cantilever beam energy collector, and the collector comprises a fixed part 1 which is used for fixing the collector at a certain position; the supporting beam and the fixing piece 1 are connected into a whole, the supporting beam comprises a bionic bamboo joint structure 2 close to one end of the fixing piece 1 and a mass structure 3 far away from one end of the fixing piece 1, and at least one micropore 6 penetrating through the upper surface and the lower surface of the supporting beam is formed in the bionic bamboo joint structure 2 and used for forming alternate rigid segments and flexible nodes on the bionic bamboo joint structure 2; the supporting beam swings with the end close to the fixing piece 1 as the circle center in the vibration environment. The mass block 5 is arranged on the mass structure 3; the number of the piezoelectric films 4 is two, the two piezoelectric films 4 are arranged on the upper surface and the lower surface of the bionic bamboo joint structure 2 respectively, and the piezoelectric films 4 cover the micropores 6 formed in the bionic bamboo joint structure 2.

The utility model relates to a mounting type arch bridge main arch ring maintenance operation platform which comprises a walking system, a suspension system, a platform system and a platform lifting system. The walking system is provided with walking trolleys on the top faces of the two sides of the main arch ring respectively and can walk along rails arranged on the main arch ring, the suspension system is suspended on the two walking trolleys through a cantilever beam, platforms on the two sides of the platform system are located on the two sides of the main arch ring respectively, a lower platform is located below the main arch ring, and a winch of the lifting system is arranged on the suspension system. And the side platform and the lower platform are connected through a traction rope. The main arch ring maintenance platform is directly hung on a main arch ring and walks along the main arch ring, bridge floor traffic can be prevented from being affected, and constructors can carry out all-directional maintenance operation on the main arch ring on the platform.

The utility model relates to the technical field of force sensors, in particular to a three-dimensional force sensor. The three-dimensional force sensor comprises a stress rod and a sensing part. The sensing part comprises a force transmission seat and a force sensing arm; one end of the stress rod is connected with the force sensing arm, and the other end of the stress rod extends along the axial direction of the transmission seat; the force transmission seat comprises an inner surface and an outer surface which are opposite in the radial direction, the inner surface surrounds to form an induction space, and the force induction arm is arranged in the induction space; the force sensing arm comprises a first sensing cantilever beam and a second sensing cantilever beam which are crossed, and the extension end of the first sensing cantilever beam and the extension end of the second sensing cantilever beam are respectively connected with the inner surface of the force transmission seat; the first induction cantilever beam and the second induction cantilever beam are respectively provided with a strain sensor. The three-dimensional force sensor can solve the problem that the strain signal output by the strain sensor on the force sensing arm in the prior art cannot accurately reflect the acting force.

The present invention relates to the technical field of measuring electrical variables, and in particular to a multi-dimensional force measurement device that takes into account both static and dynamic measurements. This device solves the technical problems of traditional six-dimensional force sensors, such as complex and cumbersome structures, overall weight, inability to take into account both static and dynamic measurements, and low measurement accuracy. The device comprises a measurement component and a vibration isolation component; the measurement component comprises a base plate, a top plate, and a cantilever beam; the cantilever beam is connected to the base plate, and the cantilever beam is inserted into a limit groove of the top plate through a support arm. The cantilever beam is provided with a uniaxial strain gauge, a first biaxial strain gauge, a second biaxial strain gauge, an X-type piezoelectric crystal, a first Y-type piezoelectric crystal, and a second Y-type piezoelectric crystal; the vibration isolation component comprises a first horizontal support plate, a second horizontal support plate, a multi-layer isolation sleeve, and a support column, and the adjacent isolation sleeve interlayers are filled with elastic material. The device realizes the combination of static and dynamic measurements, and can capture rapidly changing torques and forces while maintaining high accuracy.

The invention provides a packaging structure, an optical module and an optical system. The packaging structure comprises a photon chip, an optical fiber array and a substrate. Wherein the photon chip is internally provided with a spot size converter, and the spot size converter is composed of a cantilever beam waveguide and a first groove; the optical fiber array comprises optical fibers, a bottom plate and a cover plate, the bottom plate comprises a second groove, the second groove is used for accommodating the optical fibers, and the cover plate is buckled with the bottom plate; wherein the photon chip is arranged on the upper surface of the substrate, the bottom plate or the cover plate is arranged on the upper surface of the substrate, and the cantilever beam waveguide is in coupling connection with the optical fiber. In the packaging structure, the photon chip and the optical fiber array are arranged on the upper surface of the substrate together, and an additional supporting piece is avoided, so that the mechanical stability of the packaging structure can be ensured, the change of stress near the cantilever beam waveguide caused by temperature change, displacement, external force application and the like in the packaging structure is reduced, and low-stress packaging is realized.

The invention provides a multi-path vibration energy collection device, and the device comprises a mass block which can generate relative movement under the excitation effect; the piezoelectric cantilever beams are arranged on the two transverse sides of the mass block and used for responding to high-frequency micro-amplitude vibration energy; the permanent magnet assembly is fixed in the moving direction of the mass block and is matched with the induction coil to realize magnetoelectric energy conversion; the piezoelectric cantilever beam is connected with the bridge rectifier and the thyristor threshold trigger circuit 1, and the permanent magnet assembly is connected with the bridge rectifier and the thyristor threshold trigger circuit 2 to form a double-independent energy collection channel. The method has the following advantages: (1) a path orthogonal decoupling design is adopted, so that a structure and energy dual-independent acquisition path is realized; (2) the energy conversion efficiency is improved based on a coupling response mechanism of mass block inertia driving; and (3) a thyristor threshold triggering mechanism realizes micro-energy efficient conversion, and the output is stable and reliable.

The invention discloses a side wall balance system and method for bionic flexible skin wing measurement, belongs to the technical field of aerodynamic wind tunnel tests, and aims to comprehensively and effectively identify the aerodynamic performance gain effect of a bionic flexible skin lift-augmentation and drag-reduction wing. The side wall balance system comprises a side wall balance, the side wall balance is installed in the side wall of the test section, the side wall balance comprises a floating disc and a fixed disc, the floating disc and the fixed disc are connected through three lateral force units, two longitudinal force units and a transverse force unit, and each force measuring unit comprises a tension-compression balance. The tested model is connected with the floating disc through the low-heat-flux heat insulation flange. Compared with a cantilever beam type side-wall balance, the assembled side-wall balance system of the tension-compression balance provided by the invention has the advantages that the overall rigidity is improved, and meanwhile, the interference among components is greatly reduced. In cooperation with an original measurement method, each element force and moment of force of a bionic flexible skin wing wind tunnel test can be accurately obtained.

The invention discloses a preparation technology for preparing a high-strength PP composite material based on waste plastic regeneration, and belongs to the technical field of regenerated PP composite materials. Cleaning and crushing the separated polypropylene plastic, adding the crushed polypropylene plastic, the maleic anhydride grafted polypropylene, the composite flame-retardant powder, the reinforcing agent, the modified organic silicon resin and the antioxidant 1010 into an internal mixer, carrying out melt blending, and discharging to obtain the high-strength polypropylene composite material. The polypropylene fragments, the composite flame-retardant powder, the reinforcing agent and the modified organic silicon resin are subjected to melt blending, so that the flame retardance, the oxidation resistance, the tensile strength and the cantilever beam notch impact strength of the regenerated polypropylene are further improved.

The invention discloses a characterization analysis method and device for material adsorption capacity and structural response and a storage medium. A cantilever beam is combined with a Fourier transform infrared spectrometer, and the ultra-sensitive quality detection function of the cantilever beam and an in-situ infrared spectrum technology are utilized to synchronously detect the gas adsorption behavior of the adsorption material and the microcosmic molecular vibration information of the adsorption material. According to the invention, a trace amount of adsorption material can be tested, the research on an adsorption mechanism is facilitated, the structural change of the adsorption material can be synchronously monitored in an in-situ manner, and the accuracy is higher; the full-scale analysis from the macroscopic adsorption capacity to the microcosmic bonding mechanism is realized, and a deep analysis tool is provided for the design and application of the porous material.

The present invention discloses a rotary underwater fish-aggregating power generation device and its operating method, comprising a float, a power generation module, and a payload module; the payload module includes a housing, a rechargeable power source, a lifting unit, a storage box, and a pressure pump; the power generation module includes a main column, a rotating bearing, brushes, Q rotating frames, a sealing sleeve, and a main delivery pipe. The present invention utilizes a rotary structure to securely attach a piezoelectric composite flexible membrane to the main column and rotating frame, such as a cantilever beam. A mixture of fish-aggregating element and feed is released outward at different locations on the power generation carrier to attract fish to the device. The piezoelectric composite flexible membrane is bent and deformed by the water flow and the fish, generating and storing current. The present invention can be mounted on a payload for simultaneous use, enhancing endurance during cable-free operations in deep waters and continuous, long-term ocean exploration missions. It offers excellent concealment and utilizes the marine environment to generate electricity, but the device does not require special installation or active implantation onto marine organisms.

The turnout steel rail piece variable cross-section detection device is provided with a steel rail piece conveying bearing structure which conveys a to-be-detected workpiece in the length direction of a steel rail, the workpiece is matched with a plurality of guiding devices, the to-be-detected part of the workpiece is conveyed, contained and completely immersed in a medium of a coupling medium groove, and a cantilever beam support is arranged outside the coupling medium groove. A plurality of probe assemblies and a mechanical tool are installed on the cantilever beam support, the probe assemblies are also immersed in the coupling medium, an ultrasonic detector and an automatic control system are arranged outside the coupling medium groove, the ultrasonic detector is in interactive connection with the probe assemblies, and the automatic control system is in interactive connection with the ultrasonic detector and the mechanical tool. According to the invention, automatic and efficient detection of the full section, especially the variable section part, of the turnout steel rail piece is realized, the in-service damage risk of the rail piece is reduced, the service life is prolonged, the section coverage range and the detection precision are improved, and defects can be recorded and replayed.

The invention relates to the technical field of rotary mechanical vibration control, in particular to a quasi-zero stiffness annular superstructure device and a sea water pump composite vibration isolation system.The quasi-zero stiffness annular superstructure device comprises an inner ring and an outer ring, and the inner ring and the outer ring are connected through a plurality of quasi-zero stiffness one-dimensional structures; the quasi-zero stiffness one-dimensional structure is formed by sequentially arraying a plurality of groups of quasi-zero stiffness cell structures from top to bottom, a gap is formed between every two adjacent groups of quasi-zero stiffness cell structures, the left side and the right side of each gap are respectively provided with a group of cantilever beams, and the tail ends of the cantilever beams are respectively and fixedly provided with mass blocks with different masses so as to generate a local resonance band gap; piezoelectric patches are pasted on the inclined side wall of the quasi-zero-stiffness one-dimensional structure, a shunt circuit is connected, and a band gap is adjusted through the circuit. Compared with the prior art, multiple band gaps can be generated at low frequency on the basis that the bearing capacity is guaranteed, and low-frequency broadband vibration control over the rotating machine is achieved.

The invention relates to the technical field of stacker-reclaimers, in particular to a bucket-wheel stacker-reclaimer grounding force detection method, which comprises the following steps of: pitching a cantilever beam to the highest point, releasing redundant back pressure of a hydraulic oil cylinder, detecting a pressure value of a rod cavity through a pressure measuring point on the hydraulic oil cylinder, and recording data; pitching the cantilever beam to the lowest point, releasing redundant back pressure of the hydraulic oil cylinder, detecting a pressure value of a rodless cavity through a pressure measuring point on the hydraulic oil cylinder, and recording data; comparing the measured pressure value with a rated pressure value of the hydraulic oil cylinder; if the pressure values of the two cavities are both within the rated pressure range of the hydraulic oil cylinder and the two cavities have 30% of allowance, the grounding force balance of the whole machine is considered to be qualified, and detection is ended; if the pressure value of one cavity is within the range of the rated pressure value of the hydraulic oil cylinder, but the allowance is less than 30%, the grounding force balance of the whole machine is judged to be unqualified, the balancing weight is adjusted, detection is performed again after adjustment, the detection method is relatively simple, and the balance of the whole machine is avoided after the balance weight is adjusted.