29 results about "Residual vibration" patented technology

To accurately determine whether or not an abnormality has occurred due to the medium colliding with the liquid dispensing head. [Solution] A control method for a liquid dispensing device that dispenses liquid onto a medium, comprising a plurality of piezoelectric elements, a plurality of pressure chambers that apply pressure to the liquid inside by driving each of the plurality of piezoelectric elements, and a liquid dispensing head having a plurality of nozzles that communicate with each of the plurality of pressure chambers and from which the liquid is discharged, includes an acquisition step of acquiring residual vibration information relating to residual vibration in the pressure chamber after applying a voltage to one or more of the plurality of piezoelectric elements, and a determination step of determining whether or not a first abnormality has occurred, which is an abnormality caused by the medium colliding with the liquid dispensing head, based on the residual vibration information.

This technology provides advantages in identifying the cause of abnormalities in a body dispensing device. [Solution] The liquid dispensing device comprises a dispensing head that dispenses liquid from a plurality of nozzles, a plurality of piezoelectric elements arranged in each of the plurality of nozzles, a detection unit that detects a residual vibration signal corresponding to the distortion of the piezoelectric element caused by the pressure wave generated in conjunction with the operation of the piezoelectric element for each of the plurality of piezoelectric elements, and a processing unit that processes the residual vibration signal detected for each of the plurality of piezoelectric elements. The processing unit performs a creation step of creating a feature map showing the distribution of feature quantities of the residual vibration signal in the plurality of nozzles, and a determination step of determining an anomaly based on the feature map.

The utility model relates to the field of surveying and mapping instrument technology, concretely to a field surveying and mapping instrument protection device, including external shell, buffer assembly and internal protection cabin subassembly, internal protection cabin subassembly is located in the inside of external shell, buffer assembly is located between external shell and internal protection cabin subassembly, internal protection cabin subassembly includes honeycomb aluminium plate and memory sponge layer, honeycomb aluminium plate is located in the outside of internal protection cabin subassembly, the utility model external shell is the physical protection barrier of internal assembly construction, buffer assembly absorbs, disperses impact force, alleviates the influence to internal protection cabin subassembly, honeycomb aluminium plate gives instrument additional structure support and buffer, memory sponge layer is self -adaptation deformation according to instrument appearance, all -round package and with good buffer performance absorption residual vibration impact, ensure that instrument is stable in internal protection cabin subassembly, and a variety of protection synergy makes field surveying and mapping instrument obtain comprehensive and effective protection when transporting and site shifting in harsh environment.

This invention provides an ultrasonic sensor, comprising a body for supporting the entire ultrasonic sensor; a circuit board and a potting compound are disposed on one side of the body; an inner bushing, a probe, and an outer bushing are disposed on the other side of the body, the inner bushing being disposed between the body and the probe, the bottom surface of the probe extending outwards with at least one pin, and the outer bushing being joined with the inner bushing to partially cover the probe; the surface of the inner bushing having at least one groove corresponding to the bottom surface of the probe. The ultrasonic sensor provided by this invention, because the surface of the inner bushing has a groove, can create a gap between the bottom of the probe and the surface of the inner bushing, thereby reducing residual vibration; the bottom surface of the inner bushing has a through hole corresponding to the circuit board, and a resistive ring extending outwards from the circuit board corresponding to the through hole. The resistive ring allows for direct assembly of the probe, preventing potting compound from overflowing into the other side of the body.

The present application provides a technique for facilitating determination of a cause of an abnormality in a liquid discharge apparatus. The liquid discharge apparatus has: a discharge head that discharges liquid from a plurality of nozzles; a plurality of piezoelectric elements respectively arranged at the plurality of nozzles; a detection unit that respectively detects, for the plurality of piezoelectric elements, a residual vibration signal corresponding to a deformation of the piezoelectric element due to a pressure wave accompanying operation of the piezoelectric element; and a processing unit that processes the residual vibration signals respectively detected for the plurality of piezoelectric elements. The processing unit performs: a creation step of creating a feature quantity map representing a distribution of a feature quantity of the residual vibration signals in the plurality of nozzles; and a determination step of determining an abnormality based on the feature quantity map.

To accurately determine whether or not an abnormality has occurred in which liquid accumulation is forming on the nozzle surface. [Solution] A liquid dispensing device that dispenses liquid onto a medium has a liquid dispensing head having a plurality of piezoelectric elements, a plurality of pressure chambers that apply pressure to the liquid inside by driving each of the plurality of piezoelectric elements, and a plurality of nozzles that communicate with each of the plurality of pressure chambers and from which the liquid is discharged, and the control method for dispensing liquid onto a medium includes an acquisition step of acquiring residual vibration information relating to residual vibration in the pressure chamber after applying a voltage to one or more of the plurality of piezoelectric elements, and a determination step of determining whether or not a first abnormality has occurred, which is an abnormality in which liquid puddles are formed on the nozzle surface provided with the plurality of nozzles, based on the residual vibration information.

The application relates to the technical field of industrial equipment state monitoring and fault diagnosis, and discloses a centrifugal fan fault prediction method and system. The method comprises the following steps: collecting bearing mixed vibration data and reconstructing an initial vibration sequence, removing strong base frequency interference by using empirical mode decomposition and energy frequency screening mechanism to obtain a residual vibration signal; performing discrete wavelet transform and adaptive soft threshold denoising on the residual vibration signal, and cooperating with Hilbert envelope slice quantization to obtain a time-varying impact sequence; calculating a dynamic change rate of the time-varying impact sequence, combining a base frequency component to classify and fit an independent fault characteristic curve; constructing a fault trend distribution surface based on the fault characteristic curve, separating eccentric evolution and damage expansion trajectories by energy flow decoupling, and comparing a threshold to determine a prediction result. The application can effectively overcome the covering of weak impact characteristics by strong base frequency vibration, and realize high-precision independent prediction of centrifugal fan impeller imbalance and bearing pitting under complex coupling faults.

A liquid ejecting apparatus includes an ejecting section that ejects a liquid; a detection circuit that acquires a vibration signal according to residual vibration generated in the ejecting section and outputs a signal according to the vibration signal; a switch circuit that switches whether or not to supply the vibration signal to the detection circuit; and a power supply circuit to which a first power supply signal is input and which outputs a second power supply signal to the switch circuit, in which the power supply circuit is configured to include a linear power supply circuit to which outputs a first voltage signal, and a switching power supply circuit to which outputs a second voltage signal, and output the first voltage signal or the second voltage signal as the second power supply signal.

The application relates to the technical field of scheduling management, and discloses a micro-vibration risk prediction scheduling management system for laser precision machining, which comprises the following steps: firstly, a known scheduling table of heavy equipment and a target work order precision grade are acquired, a scheduling state and an exposure time length are generated; secondly, an allowable deviation limited by a deformation allowance and a vibration weight are obtained, a decay function is constructed and is associated with the scheduling state in a time domain, residual vibration is obtained to synthesize a source end speed; then, a machine displacement is synthesized by combining a propagation delay and a path attenuation; the machine displacement is locally exposed and weightedly integrated at a candidate time by using the vibration weight, a prediction deviation is calculated, and a risk coefficient reflecting allowance consumption is obtained; finally, feasible starting time is extracted in a resource available interval, a scheduling instruction is issued, and an audit record is generated. The application realizes automatic coupling of equipment scheduling and dynamic interference avoidance.

The present application relates to a kind of all-terrain robots with three-stage shock absorption and vibration energy recovery module in the field of robot technology.All-terrain robots include the frame structure as bearing framework, power system for driving the walking frame structure and three-stage shock absorption and vibration energy recovery module;Three-stage shock absorption and vibration energy recovery module includes the track ring engaged with the corresponding drive wheel tread pattern, for directly buffering ground impact force;Two groups of independent suspension structure, for buffering remaining impact;Two groups of damping structure, for recycling residual vibration energy.The present application is formed by track ring, swing arm one, swing arm two and damping structure The hierarchical connection design of three-stage shock absorption effectively reduces multiple types of impact force, and recovers vibration energy during operation, improves endurance, thereby solving the safety decline of robot bearing equipment and vibration energy waste caused by the inability of traditional damping structure to grade isolation vibration.

To provide a liquid dispensing device that can achieve both improved accuracy in determining the condition of the dispensing section and reduced inspection time for the condition of the dispensing section. [Solution] A liquid dispensing device comprising: a transport unit for transporting a medium; a dispensing unit for dispensing liquid into the medium; a residual vibration detection circuit that acquires a residual vibration signal corresponding to residual vibrations generated in the dispensing unit and outputs a residual vibration detection signal corresponding to the residual vibration signal; a first conversion circuit including a comparison circuit that outputs a comparison result signal whose logic level changes according to the comparison result between the voltage value of the residual vibration detection signal and a reference voltage value; a second conversion circuit including an A / D conversion circuit that outputs a detection voltage signal obtained by converting the residual vibration detection signal into a digital signal; and a determination circuit for determining the state of the dispensing unit, wherein the determination circuit has a first determination mode for determining the state of the dispensing unit according to the comparison result signal and a second determination mode for determining the state of the dispensing unit according to the detection voltage signal.

The present application belongs to the technical field of equipment maintenance, and provides a health state multi-parameter fusion diagnosis and maintenance method for a blast furnace opening machine bearing seat, comprising: dividing the opening operation of the blast furnace opening machine bearing seat into driving loading, slag impact, advancing bearing and backstroke unloading stages, and constructing a mechanical response chain; dividing the operation process into high-impact, disturbance and low-load recovery furnace condition windows; mapping and aligning the current mechanical response chain under the corresponding furnace condition window with the historical stable mechanical response chain in terms of force transmission path consistency, and identifying abnormal response sections according to the path deviation degree and the characteristic out-of-bound condition; performing chain tracking on the abnormal response sections, collecting impact peak increment, unloading duration and residual vibration retention amplitude according to the window constraint, and dividing the bearing seat deterioration state; performing hierarchical maintenance under the constraint of the bearing seat deterioration state and the furnace condition window type, updating the furnace condition constraint boundary and the path deviation determination rule.

This application relates to the field of massage equipment control technology and discloses a multi-mode massage vibration closed-loop adaptive control system, including a mode determination module, a situation determination module, a window matching module, a trajectory generation module, and a closed-loop takeover module. First, the current operating mode and the target switching mode are determined. Then, based on the actual vibration response information, the current residual vibration situation is determined, and the target mode access window and target initial drive parameters are matched. Subsequently, a mode switching transition trajectory is generated. During the transition execution process, the transition trajectory segments that have not yet been executed are updated based on the actual vibration response information until the stable takeover conditions are met, at which point the system switches to the target mode for continuous output. This system can reduce rhythmic breaks, switching shocks, and abnormal acoustic and vibration changes during mode switching, improving switching continuity, tactile smoothness, and operational stability.

The present application relates to the technical field of track monitoring, and discloses a mobile three-dimensional laser scanning device, which comprises two parallel tracks and a walking frame moving on the tracks, and further comprises a bearing main beam arranged between two main shafts, and an auxiliary cross beam connected with the bearing main beam and arranged between the two main shafts; a table plate is arranged on the bearing main beam in a liftable manner, an angle adjusting frame is arranged on the top of the table plate, and a total station is arranged on the top of the angle adjusting frame; a three-stage damping system is formed by a third arc-shaped plate member, a side auxiliary beam rubber buffer and a damping auxiliary frame elastic shock absorption, so that vibration forces are gradually offset; the vibration force transmitted by the walking wheel is first absorbed by the extension deformation of the third arc-shaped plate member, residual vibration is secondly buffered by the elastic deformation of the side auxiliary beam rubber strip, and lateral vibration is thirdly offset by the cooperative deformation of the arc-shaped plate member and the spring of the damping auxiliary frame, so that the vibration transmission path is blocked from all directions of the walking end, the connecting end and the bearing end.

A control method of a liquid ejecting apparatus that includes a liquid ejecting head having a plurality of piezoelectric elements, a plurality of pressure chambers which apply pressure to an internal liquid by respectively driving the plurality of piezoelectric elements, and a plurality of nozzles which respectively communicate with the plurality of pressure chambers and from which the liquid is ejected, and that is configured to eject the liquid onto a medium, includes an acquisition step of acquiring residual vibration information on residual vibrations in the pressure chambers after applying a voltage to one or more of the plurality of piezoelectric elements, and a determination step of determining whether or not a first abnormality, which is an abnormality caused by the medium colliding with the liquid ejecting head, is generated based on the residual vibration information.

A liquid ejecting apparatus includes a transport section that transports a medium, an ejection section that ejects liquid to the medium, a residual vibration detection circuit that acquires a residual vibration signal corresponding to residual vibration generated in the ejection section and outputs a residual vibration detection signal corresponding to the residual vibration signal, a first conversion circuit that includes a comparison circuit and outputs a comparison result signal in which a logic level changes according to a comparison result between a voltage value of the residual vibration detection signal and a reference voltage value, a second conversion circuit that includes an A / D conversion circuit and outputs a detection voltage signal obtained by converting the residual vibration detection signal into a digital signal, and a determination circuit that determines a state of the ejection section, and the determination circuit includes a first determination mode in which the state of the ejection section is determined according to the comparison result signal, and a second determination mode in which the state of the ejection section is determined according to the detection voltage signal.

The application relates to the technical field of unmanned planes, in particular to a folding rotor unmanned plane special for field geological exploration, which comprises an unmanned plane, the unmanned plane comprises a fuselage and wings, the fuselage is provided with a damping assembly, and the damping assembly comprises a base, a supporting leg, a bottom plate, a lifting shaft and an air bag. The folding rotor unmanned plane special for field geological exploration can damp the fuselage through the cooperative action of a reset spring, a ring-shaped cylinder closed gas and an air bag, the reset spring can directly buffer the vertical impact force when the fuselage falls to the ground, the vibration is reduced to be conducted to the inside of the fuselage, the ring-shaped cylinder and a ring-shaped plate form a closed cavity, the ring-shaped plate is moved up to compress the internal gas when falling to the ground, the vibration energy is consumed by using the gas damping effect, meanwhile, the air bag is extruded to generate flexible buffering, residual vibration is further absorbed, and the impact vibration when the unmanned plane falls on the apron is offset in multiple layers.

The application discloses a linear servo joint end vibration self-adaptive suppression method and system, and the method comprises the following steps: performing feature decoupling on a multidimensional signal to obtain a preliminarily decoupled dynamic force signal, and performing component extraction on the preliminarily decoupled dynamic force signal to obtain a high-frequency signal component; determining a cross-correlation coefficient of a linear servo joint theoretical linear acceleration and the high-frequency signal component; determining a vibration signal attenuation factor according to the high-frequency signal component of an adjacent moment; determining whether the current state is a mechanical residual vibration based on the cross-correlation coefficient and the attenuation factor; if yes, starting real-time tracking of a resonance frequency, determining a real-time resonance frequency of the linear servo joint under a current posture; updating a transfer function of a notch filter based on the real-time resonance frequency; inputting an original control instruction into the updated notch filter for feedforward shaping, and outputting a shaped compensation current instruction to a servo driver, so that the linear servo joint end vibration is suppressed.

The utility model relates to pressure container protection technical field, specifically disclose a pressure container anti -collision protection device, including the protective sleeve around pressure container outside, the protective sleeve includes by a plurality of protection board and is connected along the circumference, the lower end of protection board is equipped with the support plate, and the back side of protection board is connected with the support of up, down sliding, and the support is in the inside of pressure container;The utility model adopts multistage energy dissipation mode, and the first stage buffer: external impact force is dispersed by the rigid shell of protection board;Second energy absorption: internal buffer stick core absorbs impact energy through plastic deformation or compression;Three stage attenuation: roof buffer strip reduces the transmission of residual vibration, protects the container body, improves the protection effect;And the device and pressure container are for contact fit, avoid the problem that pressure container side wall is damaged because of welding or bolted connection;And the device adopts modular splicing structure, and the device is convenient to dismount and maintain, and the cost is reduced.

This invention relates to a liquid ejection device and head unit, which improves the accuracy of determining the state of the ejection section and reduces the state inspection time. The liquid ejection device includes: a conveying section for conveying a medium; an ejection section for ejecting liquid into the medium; a residual vibration detection circuit for acquiring a residual vibration signal corresponding to residual vibration generated in the ejection section and outputting a residual vibration detection signal corresponding to the residual vibration signal; a first conversion circuit including a comparison circuit for outputting a comparison result signal whose logic level changes according to a comparison result between the voltage value of the residual vibration detection signal and a reference voltage value; a second conversion circuit including an A / D conversion circuit for outputting a detection voltage signal obtained by converting the residual vibration detection signal into a digital signal; and a determination circuit for determining the state of the ejection section, the determination circuit having: a first determination mode for determining the state of the ejection section based on the comparison result signal; and a second determination mode for determining the state of the ejection section based on the detection voltage signal.

The present application relates to the technical field of precision motion control and vibration suppression, and proposes a precision motion control method and system for multi-modal resonance and disturbance collaborative suppression. Through multi-modal parameter identification and frequency band division, the dominant resonance mode is divided into an instruction excitation frequency band and a disturbance excitation frequency band, and multi-modal input shaper and multi-channel disturbance estimation and feedforward compensation are respectively used for targeted processing. At the same time, through a joint optimization objective function containing a residual vibration index, a disturbance sensitivity index and a phase difference penalty term, the input shaping channel parameters and the feedforward compensator parameters are collaboratively optimized, so that the instruction excitation vibration suppression and the external disturbance compensation are decoupled and matched in the frequency domain. In the multi-modal vibration and multi-source disturbance environment of the precision motion platform, high-precision and high-stability collaborative control is realized.

This invention discloses a millimeter-wave radar signal processing method for vehicle-mounted vital sign monitoring, belonging to the field of radar signal processing. The method simultaneously acquires millimeter-wave radar echo signals and vibration sensor signals to generate an equivalent vibration reference signal with the same vibration response characteristics as the radar. Based on the frequency domain analysis of this reference signal, the vehicle's operating conditions are identified, and the frequency domain interference detection threshold, mask attenuation intensity, and frequency band coverage are dynamically adjusted to construct a weighted frequency domain mask. The mask is multiplied by the radar echo spectrum to suppress interference frequencies, and residual vibrations overlapping with the vital sign frequency band are vector-cancelled using a complex domain interference cancellation model to reconstruct a high signal-to-noise ratio time-domain signal. Furthermore, chest cavity micro-motion information is extracted, and respiratory and heartbeat signals are separated and their frequencies estimated. This invention improves the stability and robustness of vital sign monitoring in complex vehicle environments.

This invention discloses a phonon crystal vibration-damping floor slab for subway superstructures and its preparation method, belonging to the field of vibration reduction and noise reduction in rail transit and building structure technology. It includes, from top to bottom, a decorative surface layer, an upper damping layer, a phonon crystal vibration-damping layer, a lower damping layer, and a reinforced concrete base layer. The phonon crystal vibration-damping layer is composed of multiple local resonant units arranged in a periodic array in a horizontal plane. Each local resonant unit includes a central mass block, an elastic covering layer enclosing the outer surface of the central mass block, and a constraint shell enclosing the elastic covering layer. In this invention, by rationally designing the mass of the central mass block in the local resonant unit, the stiffness of the elastic covering layer, and the coupling effect of the constraint shell, a broadband gap can be formed in the frequency band where the main energy of subway vibration is concentrated. Simultaneously, the upper and lower damping layers can dissipate residual vibration energy passing through the phonon crystal vibration-damping layer, further improving the overall vibration reduction effect.

The present application relates to the technical field of support, specifically to a shock-absorbing and noise-reducing support for a rail vehicle obstacle detection system, comprising a mounting support, a main support is detachably installed on the upper surface of the mounting support through bolts, an outer shell is detachably installed on the upper surface of the mounting support, a radar module is detachably installed on the main support through bolts, a buffer device is arranged on the main support, and a camera module is arranged on the buffer device. By setting a double shock-absorbing structure, a high-damping rubber shock absorber between the mounting support and the vehicle body can achieve a low-frequency vibration attenuation rate of greater than or equal to 65% in the 5-50Hz frequency band, effectively attenuating most of the vibrations transmitted by the vehicle body, the main support adopts a topologically optimized composite aluminum profile, has a built-in particle sound absorption structure, and avoids the 2-50Hz external excitation main frequency band, which can not only avoid structural resonance, but also further dissipate residual vibrations.

A refresh operation is executed in response to a first trigger or a second trigger. The refresh operation includes a seek operation, a stabilization operation to wait for attenuation of residual vibration of a magnetic head, and a rewrite operation to rewrite all data of a first storage area to the first storage area after the stabilization operation. The controller decreases a value of a counter corresponding to the first storage area in response to the rewrite operation. The controller increases a value of a counter corresponding to a second storage area in response to the rewrite operation. The stabilization operation includes an operation to determine whether a completion condition is satisfied. The completion condition varies depending on a trigger for executing the refresh operation.

This invention relates to a trajectory tracking method for a dual-arm humanoid robot based on an improved terminal sliding mode algorithm. This method addresses the problem in existing technologies where neglecting joint flexibility leads to controllers being prone to high-frequency vibrations and reduced robustness. It establishes a state-space model incorporating flexible dynamics and extracts the instantaneous vibration frequencies and damping characteristic parameters of the system online. Using these characteristic parameters, an adaptive non-singular terminal sliding mode surface with frequency avoidance and damping injection capabilities is dynamically constructed. A linearly extended state observer is combined to perform real-time estimation and feedforward compensation of the system's lumped disturbances, designing a continuous and smooth composite control law. The above steps are integrated through a closed-loop execution process, achieving high-precision tracking of the desired trajectory while effectively suppressing residual vibrations of the flexible joints, significantly improving the system's stability and robustness under complex operating conditions.

A control method of a liquid ejecting apparatus that includes a liquid ejecting head having a plurality of piezoelectric elements, a plurality of pressure chambers which apply pressure to an internal liquid by respectively driving the plurality of piezoelectric elements, and a plurality of nozzles which respectively communicate with the plurality of pressure chambers and from which the liquid is ejected, and that is configured to eject the liquid onto a medium, includes an acquisition step of acquiring residual vibration information on residual vibration in the pressure chambers after applying a voltage to one or more of the plurality of piezoelectric elements, and a determination step of determining whether or not a first abnormality, which is an abnormality in which liquid pool is formed on a nozzle surface on which the plurality of nozzles are provided, is generated based on the residual vibration information.

The utility model discloses a train squatting closet production mould in the technical field of squatting closet mould, including mounting seat, the hydraulic cylinder is fixedly installed on the mounting seat, be provided with the workstation on the mounting seat, be provided with the upper pressure mould on the output of hydraulic cylinder, the lower mould is slidably connected on the workstation, be provided with the cavity between the workstation and lower mould, be provided with buffer assembly in the workstation, buffer assembly includes pressure pipe and spring. The utility model discloses a pressure pipe and spring are combined buffering, wherein, the hydraulic cavity in pressure pipe forms multistage damping through spiral vortex hole and flow guide groove, and the air cavity utilizes the compressibility of air to absorb residual vibration, and the guiding structure of workstation is cooperated, reduces the vibration and impact in the stamping process, protects the mould structure from the resilience damage, ensures product size accuracy, prolongs the service life of mould simultaneously.

This application relates to the field of ultrasonic flow meter technology, and provides an ultrasonic transducer and an ultrasonic flow module. The piezoelectric transducer of the ultrasonic transducer is welded and fixed to the circuit board based on multiple dispersed welding areas. The sum of the areas of each welding area is less than the area of ​​the piezoelectric transducer, thereby reducing the load on the piezoelectric transducer. The ultrasonic transducer is fixed to the bottom of the flow pipe section in a "pattern" manner and mechanically fixed by a riveting structure. A coupling agent is provided at the edge connecting the piezoelectric transducer and the flow pipe section. This application provides a composite structure using "soft coupling agent surrounding and hard mechanical structure fixing," forming a multi-level suppression mechanism for the residual vibration of the piezoelectric transducer, effectively suppressing the aftershocks of the piezoelectric transducer. The "pattern" structure also further improves the miniaturization and wide range of the ultrasonic transducer.