2529 results about "High frequency vibration" patented technology

An ultrasonic surgical instrument for dissection and coaguation of tissue is provided. The surgical instrument includes a vibration coupler supported within a housing and operably connected to an ultrasonic generator. An angled blade member is connected to the distal end of the vibration coupler to conduct high frequency vibration from the ultrasonic generator to the blade member. A clamp member is positioned adjacent to the blade member and is movable from a first position to a second approximated position. The clamp member and angled blade member combine to enhance contact between the tissue and the blade member during operation of the instrument to improve the performance of the instrument.

An ultrasonic surgical instrument for dissection and coagulation of tissue is provided. The surgical instrument includes a vibration coupler supported within a housing and operably connected to an ultrasonic generator. An angled blade member is connected to the distal end of the vibration coupler to conduct high frequency vibration from the ultrasonic generator to the blade member. A clamp member is positioned adjacent to the blade member and is movable from a first position to a second approximated position. The clamp member and angled blade member combine to enhance contact between the tissue and the blade member during operation of the instrument to improve the performance of the instrument.

A skin beautification cosmetic system comprising an iontophoresis device, an infrared (including far infrared) generator, an ultrasonic vibrator, and a cosmetic composition is disclosed. The system ensures effective action of moisturizing and whitening cosmetics without causing any problem in the skin. By specifying the type of cosmetic to be used, the system can ensure a more effective beautification action, can improve dry skin and aging skin which adversely affect the female skin, and can decompose and remove melanin. Moisturizing and/or whitening cosmetic components such as hydrophilic gel and ultrafine gel are applied to the face or skin or impregnated in a skin contact member section, following which iontophoresis high frequency vibration is applied to the face or skin for a prescribed period of time using an ultrasonic vibrator 3 with built-in high ionization iontophoresis device 2 and infrared generator 9.

An engine (8) is mounted to a vehicle body by means of vibration isolating mounts (8E), and a support member (15) is mounted to the engine (8). Vibration isolating members (20) are provided between this support member (15) and a mounting bracket (17) mounted to an exhaust gas treatment device (16). Accordingly, even in cases where the engine (8) has generated high-frequency vibrations, these vibrations can be damped by the vibration isolating mounts (8E) and the vibration isolating members (20). In consequence, treatment members constituting the exhaust gas treatment device (16) , such as a catalyst, a filter, and a sensor, can be protected from the vibrations of the engine (8). In addition, as the exhaust gas treatment device (16) is provided with the mounting bracket (17), the vibration isolating members (20) can be reliably mounted to the exhaust gas treatment device (16) by means of the mounting bracket (17).

The invention belongs to the technical field of vibration test, in particular to a thin-walled structure part vibration test device and a method based on a piezoelectric ceramic vibration exciter. The device comprises a signal generator, a piezoelectric ceramic drive power supply, a piezoelectric ceramic vibration exciter, a feedback attenuator, a laser vibration meter, a data acquisition analyzer and an upper computer. The method comprises the steps of performing modality test on a thin-walled structure part, determining a linear relationship between excitation voltage and critical excitation frequency of the signal generator and calibrating an excitation force of the piezoelectric ceramic vibration exciter based on a cantilever theory. According to the device and the method, an excitation signal can be effectively acquired; the magnitude of the excitation force when the piezoelectric ceramic vibration exciter excites the structure part is defined; the stable designated excitation force and the linear excitation signal of the excitation frequency can be generated; influencing factors of non-linear piezoelectric ceramic excitation are effectively eliminated; the piezoelectric ceramic vibration exciter is adopted to realize high-frequency vibration excitation; additional mass is low; and the device is convenient to use.

The invention discloses a parallel mechanism based multidimensional vibration platform. Standard zero stiffness of a vibration isolation platform at the equilibrium position and nonlinear stiffness nearby the equilibrium position can be realized by setting certain structural parameters, and the problem about difficulty in isolating low-frequency or ultra-low-frequency vibration for a traditional linear vibration isolation system; stiffness and damping can be easily and conveniently adjusted, vibration isolation of broad frequency domains are satisfied, and good engineering applicability is achieved; the multidimensional vibration platform is high in bearing stiffness, low in movement stiffness, small in static deflection, low in dynamic inherent frequency and good in vibration isolation effect; inherent contradictions restricting the traditional vibration isolation system, namely the contradictions of low-frequency vibration transmissibility and high-frequency vibration attenuation, can be solved by flexible adjustment of the stiffness and damping; the height and the static equilibrium position of the entire platform can be changed by adjusting a shock absorber spring base in height, and the multidimensional vibration platform is applicable to vibration isolation of objects of different weight.

The invention relates to a wind turbine generator bearing fault diagnosis method for a multi-channel deep convolutional neural network. The method comprises the steps of: simultaneously acquiring high-frequency vibration acceleration signals of a drive end and a non-drive end of a test bearing in various states by using a vibration acceleration sensor; analyzing the acquired vibration signals by using a time frequency analysis technology to obtain corresponding time frequency spectra; establishing a deep convolutional neural network diagnosis model, and training the diagnosis model by using the time frequency spectra and the states of the bearing as a training sample; evaluating the diagnosis model, and applying the diagnosis model to a bearing to be monitored. The method can realize automatic feature learning, avoids feature engineering, effectively utilizes multi-channel vibration signals, and has good universality and extensibility.

The invention relates to a high-speed precision cutting machine which is mainly suitable for cutting flexible materials, including paper, fabric, leather, composite materials and the like. The high-speed precision cutting machine is characterized in that the high-speed precision cutting machine is further provided with a high-frequency vibration device mounted in a machine head, a linear sliding block mounted on a cross beam and a one-way floating device mounted on a framework; and two motors are respectively arranged on the machine head, a material pressing mechanism comprises a knife seat, a pressing pad, a spring and a seal ring, a transmission mechanism is a steel strip structure with an open hole and flanged edges, a balancing block, an eccentric crankshaft, a knife bar and a bearingare arranged in a mounting seat of the high-frequency vibration device, the linear sliding block comprises a steel ball rolling path and a steel ball retainer, and a guide column, a pressure plate, aY-direction connecting plate and an X-direction connecting plate are arranged on the one-way floating device. The structural design is more compact and reasonable, the volume is small, the mounting is more convenient and the cost is lower; and simultaneously, the high-speed precision cutting machine is convenient and reliable to use and wide in range of applications, and can precisely cut all flexible materials at high speed.

The invention discloses an optical frequency division multiplexing phase-sensitive optical time domain reflectometer which comprises a narrow line width laser, an optical fiber coupler, a phase modulator, a scrambler, an erbium-doped optical fiber amplifier, an acoustic optical modulator, an optical fiber circulator, a signal generator module, a trigger source, a double balance detector, a low pass filter, a data acquisition card, a computer and a long-distance sensing optical fiber. According to the optical frequency division multiplexing phase-sensitive optical time domain reflectometer, the fundamental contradictions between the measuring distance and sampling rate in a distributed sensing system can be solved, and remoter or higher-frequency vibration is detected; and moreover, due to amplitude and phase information, the characteristics of a vibration source are judged at the first time, and the early warning can be provided immediately.

The invention discloses a vibration sensor and audio equipment. The vibration sensor comprises a shell which is provided with an accommodating cavity with an opening; a circuit board component that isfixedly connected with the shell and blocks the opening; an MEMS microphone that is arranged on one surface of the circuit board component, positioned in the accommodating cavity, and electrically connected with the circuit board component; a first vibration film that is arranged on the inner wall surface of the accommodating cavity; a mass block that is fit with the surface of the first vibration film, wherein when a vibration signal or a pressure signal is input from one side, far away from the accommodating cavity, of the shell, the first vibration film and the mass block vibrate, so as todrive the air pressure in the accommodating cavity to change. The technical scheme provided by the invention aims at enabling the vibration sensor to have good vibration response to high frequency vibration and low frequency vibration, and thus the effect of the vibration sensor applied to the audio field is enhanced.

The present invention comprises a dry powder inhaler (DPI) that uses a patient's inhalation flow to concentrate energy in an aeroelastic element for deaggregation and dispersion of a powder dose. The result is a DPI that delivers a dose independent of inspiratory abilities of the patient, solving a major problem of conventional DPIs. Increased tension on the aeroelastic element causes higher frequency vibrations and improved powder dispersion. The tension of the aeroelastic element can be modified prior to dispensing the DPI to the patient, allowing for individualization for single patients or groups of patients. In addition, the DPI has features that increase the turbulence of the airflow as it passes through the device, further increasing the dispersion and deaggregation of the powder. The DPI can hold a single dose or multiple doses. The powder doses can be dispensed directly onto the aeroelastic element, or may be in adjacent blister packaging.

The invention discloses a multi-channel synchronous vibration data collecting system which comprises signal front-end processing modules, a singlechip integration control module, a data communication module and a collection computer; two signal front-end processing modules and one singlechip integration control module form a collecting card; a plurality of the collecting cards are inserted and connected on a shared address, data, clock and triggering bus; one end of the data communication module is also inserted and connected on the shared address, data, clock and triggering bus while the other end thereof is connected with the collecting computer by a USB communication wire; the collecting system can completely meet vibration signal collecting requirement and simultaneously has multiple sampling channels and the function of collecting synchronous signals; the collecting system also has program control function, can meet the need of different sensor types, has high collecting speed, small volume and two collecting functions of common real-time collection and transient collection, can not only be applied to low-frequency vibration test, but also suitable for high-frequency vibration tests such as crash, explosion and the like.

An edge-driven diaphragm loudspeaker driver is configured such that the suspension system of the driver is connected to the voice coil rather than to the diaphragm. Thus, the diaphragm in the loudspeaker is free of suspension systems connected to or extending from the diaphragm. By attaching the surround suspension to the voice coil rather than to the diaphragm, the diaphragm is isolated from the influence of spurious high frequency vibrations in the suspension system, thereby increasing the performance of the loudspeaker at high frequencies. The loudspeaker driver configuration also provides for a longer excursion range for the voice coil/diaphragm assembly, which allows for the driver components to be more accurately aligned during manufacturing, thereby enabling the loudspeaker driver to operate as a full range unit by producing low output frequencies.

The invention provides an electrostatic microscope and a measurement method. The electrostatic microscope consists of a scan head, a low frequency voltage signal generator, a high frequency voltage signal generator, a low frequency vibration signal detector, a high frequency vibration signal detector and a controller; and the scan head comprises a probe, a probe location inductor, a piezoelectric vibration exciter and a piezoelectric scanner. Based on an existing electrostatic force microscope, a higher order eigenvibration mode of the probe is adopted to measure electrostatic force. As interaction of the probe and the sample is different in different vibration modes, the corresponding performance is different in aspects such as resolution, sensitivity, stability and the like. The electrostatic microscope can help significantly improve spatial resolution of the electrostatic force microscope in atmospheric environment.

The invention discloses a self-exited push-pull converter, comprising an input soft starting circuit, a bipolar push-pull circuit, a coupling transformer and an output filter circuit, wherein the input soft starting circuit, the bipolar push-pull circuit, the coupling transformer and the output filter circuit are connected in order; the bipolar push-pull circuit comprises two triodes and a high frequency self-exited suppression circuit, wherein the two triodes are in push-pull connection; the emitters of the two triodes are grounded; the bases of the two triodes are respectively connected with two ends of a feedback winding of the coupling transformer; the collectors of the two triodes are connected with two ends of a primary winding of the coupling transformer; the high frequency self-exited suppression circuit is used for removing sine vibration generated due to high characteristic frequency when the triodes are electrified; and the high frequency self-exited suppression circuit is connected in the bipolar push-pull circuit. The self-exited push-pull converter can effectively control high frequency vibration.

The invention relates to a non-contact-type ultrasonic-assisted laser welding method belonging to the field of material processing engineering and aiming at solving the technical problems of easy air hole and hot crack generation, joint softening, and the like occurring in the laser welding of metal, such as titanium alloys, aluminum alloys, and the like in the prior art. The invention adopts non-contact-type ultrasonic-assisted laser welding of titanium alloys or aluminum alloys, the generated cavitation action and the breaking theory of ultrasonic waves in a molten pool can be used for thinning grains of a welding line and further improving the mechanical performance of the welding line; the high-frequency vibration of the ultrasonic waves can generate a certain stirring action in the molten pool, and moreover, the ultrasonic waves per se have cavitation action, and thus, the full overflow of gases in the liquid metals and the reduction or avoidance of the generation of air holes are benefited. Compared with contact-type ultrasonic-assisted welding, the method has a wide use range because an ultrasonic tool head is not in contact with a workpiece, is convenient to realize omnidirectional automatic flexible welding and improves the efficiency.

The invention relates to a libration simulator for a space laser communicating platform and is provided with a laser emission unit (6), an optical power adjusting unit (7), a beam servounit (8), a beam extending unit (9), a communicating optical transmitter and receiver (10) for the tested laser, a beam servo drive unit (11), a DA transfer card (12), a power spectrum generating unit (13) and an optical table (14). The invention can simulate on low frequency agitation and high frequency libration and can effectively inspect and verify the APT tracing precision of a space laser communicating system. A simulative bandwidth can reach to 100Hz, the maximum simulative extent of low frequency can reach to 20mrad, and the controlling precision of high frequency extent can reach to Mu rad magnitude. The invention has broader dynamic range, can librate randomly according to the wide spectrum of a power spectrum simulative platform, can also simulate the movement of a relative angle and sinusoidal excitation, and can detect on the dynamic lag error of the APT system, realize two-dimensional libration simulation, realize optical power adjusting and big caliber parallel beam emission and meet the test requirement for the tracing precision of the space laser communicating APT.

The present invention provides a medical liquid droplet apparatus, which comprises a driving base and a polymeric film. The driving base is capable of providing a vibrating energy. The polymeric film, having a plurality of tiny openings formed thereon, is disposed on the driving base for receiving the vibrating energy so as to generating liquid droplet. By means of the present invention, the embrittled problem due to the high frequency vibration occurred in the conventional nebulizing film or malfunction due to the chemical eroding of the conventional vibrating film can be avoided.

The invention provides an automatic focusing and leveling device and is applied in a photoetching machine to measure the height value and lean degree of the surface of a silicon chip to be measured relative to the focal plane of a projection objective lens, therefore, the focusing and leveling of the silicon chip can be realized. The automatic focusing and leveling device is provided with an optical module and a control module, both of which are connected with each other through electricity, wherein, the optical module adopts a plate glass and gets rid of limitation of mechanical size, therefore, the invention can realize high-frequency vibration more easily and is easy to be regulated.

The invention relates to a high-frequency vibration casting mold of a conical sand maker breaking wall and a casting process capable of achieving the effect of no shrinkage cavity and effectively improving the cast density during casting feeding of the conical sand maker breaking wall. The high-frequency vibration casting mold is characterized in that a sand box is located on a high-frequency vibration platform; and the height of a breaking wall forming mold cavity in the sand box is smaller than the height of a casting riser or the volume of the forming mold cavity is smaller than the volume of the casting riser. The casting process comprises the following steps: casting high chromium cast iron into the breaking wall forming mold cavity and the casting riser, then carrying out high-frequency vibration on the high-frequency vibration platform, and cooling to obtain the high chromium cast iron breaking wall with a high density. The high-frequency vibration casting mold and the casting process have the advantages that firstly, the wear resistance of the high chromium cast iron breaking wall is effectively improved, and the sand making cost is greatly reduced; secondly, the feeding effect is good, the cast is high in density, and the occurrence of damage phenomenon is avoided; and thirdly, the wear resistance, the shock resistance and the service life are increased by nearly 5 times, and unexpected technical effects are achieved.