13 results about "Tuning fork" patented technology

A tip-enhanced spectroscopy may include a substrate on which liquid containing an analyte is to be positioned, a tip extending from a fixed end to a free end adjacent to a location for the analyte, and a vibration source configured to harmonically vibrate the tip based on a preset natural frequency. The preset natural frequency may be a natural frequency of a tuning fork.

The application discloses a tuning fork type optical fiber photoacoustic spectrum detection method and device, and belongs to the technical field of spectrum detection, which comprises a tuning fork, a first detection optical fiber and a second detection optical fiber, the tuning fork is arranged in a to-be-detected gas environment, and the two detection optical fibers respectively form Fabry-Perot cavities with the outer surfaces of two vibration arms of the tuning fork. The method comprises the following steps: after modulating excitation laser, the modulated excitation laser is incident to the gap between the two vibration arms of the tuning fork, and the to-be-detected gas absorbs the modulated excitation laser to generate a photoacoustic signal; the photoacoustic signal drives the two vibration arms of the tuning fork to generate mechanical vibration, so that the cavity lengths of the two Fabry-Perot cavities change; the change amounts of the corresponding reflected interference spectra of the two Fabry-Perot cavities when the cavity lengths change are detected respectively, the change amounts of the two obtained reflected interference spectra are added, a harmonic signal is extracted, and the concentration information of the to-be-detected gas is inversely calculated through the amplitude of the harmonic signal. The spectrum detection method and device are high in sensitivity, high in accuracy, low in cost, easy to integrate, capable of resisting electromagnetic interference and suitable for long-distance detection.

This invention provides a sensor packaging structure and a method for fabricating the sensor packaging structure, relating to the field of chip packaging technology. The structure includes a substrate, a base chip, a first stacked chip, a first adhesive layer, a second stacked chip, and a second adhesive layer. The second stacked chip is offset onto the base chip. A base step groove is formed on the base chip, and a first tuning fork wire is formed within the base step groove. A first cavity is formed by the first adhesive layer, and this first cavity communicates with the base step groove. The first tuning fork wire is disposed within this first cavity. Compared to existing technologies, this invention, by setting the base step groove, increases the volume of the first cavity, thereby increasing the volume of the sound cavity and improving the chip's sound quality and sensitivity. Simultaneously, the first tuning fork wire within the first cavity enables vibration within the cavity, increasing the sound pressure energy or amplifying the sound waves, thereby improving the chip's filtering function or further enhancing sound quality and sensitivity.

This invention relates to the field of music teaching aids, specifically an adjustable-timbre percussion sound generator, comprising: a base, on which a rotating platform is mounted, and a support shaft passing through the rotating platform is fixed on the base; multiple sets of tuning forks arranged equidistantly on the inner side of the rotating platform; multiple sets of striking components installed between the support shaft and the rotating platform, each striking component including an energy storage structure and a trigger element, wherein a convex shaft on the energy storage structure cooperates with the trigger element, enabling the energy storage structure to strike the tuning forks when the rotating platform rotates at a certain angle; an elastic support structure connecting the striking components, which cooperates with a tension structure on the support shaft, enabling the striking components to strike the tuning forks after a certain displacement; and an adjustment component on the support shaft and connected to the striking components and the tension structure, wherein the adjustment component can change the position of the energy storage structure striking the tuning forks to achieve multi-mode sound generation.

This invention belongs to the field of oil gas detection technology and discloses a non-contact in-situ monitoring method and device for dissolved gases in oil. The in-situ monitoring method includes the following steps: selecting the emission laser wavelength of the excitation light source based on the absorption spectrum of the target gas dissolved in the oil, according to the type of the target gas; filling the oil sample cell (transparent at both ends) with the protective oil for the power equipment to be tested; then, incident the modulated collimated laser into the oil sample cell, and the beam emitted from the oil sample cell irradiates the surface of a tuning fork. The vibration signal of the tuning fork, based on the photothermoelastic effect and resonance enhancement effect, can reflect the change in light intensity caused by the absorption of dissolved gases in the protective oil for the power equipment; by demodulating the vibration signal of the tuning fork and extracting the harmonic signal amplitude, the concentration information of the gas contained in the protective oil for the power equipment to be tested can be obtained. This invention can directly detect the concentration of dissolved gases in oil in situ without degassing and without the detection unit contacting the oil sample.

This invention proposes a method and system for detecting dissolved gases in transformer oil, belonging to the field of gas detection technology. The system includes: a gas chamber and an oil-gas separation membrane; the gas chamber is connected to a bypass in the transformer oil circuit, and a tuning fork is installed in the gas chamber; the oil-gas separation membrane is located between the bypass interface of the transformer oil circuit and the gas chamber; one side of the oil-gas separation membrane is oil in the transformer oil circuit, and the other side is gas; dissolved gases in the oil in the transformer oil circuit diffuse into the gas chamber through the oil-gas separation membrane; the dissolved gases in the oil in the transformer oil circuit under test generate sound waves, i.e., photoacoustic signals, in the gas chamber due to the photoacoustic effect; these sound waves are detected by the tuning fork and processed to determine the gas concentration value.

The application relates to the technical field of plastic track recycling, in particular to a plastic track material recycling and processing device, which comprises a screening brine tank for plastic track material recycling, a recycling screening mechanism, a discharging linkage mechanism and a chopping mechanism, a controller is fixedly installed on the front side wall of the screening brine tank, the recycling screening mechanism comprises a blowing tank, a rotating roller, a structure disc seat and a salt storage tank, a plurality of air blowers are fixedly installed on the outer wall of the blowing tank at equal intervals, a rubber folding plate is fixedly installed on the outer wall of the rotating roller, a plurality of water filtering holes are uniformly arranged on the rubber folding plate, a tuning fork type online density meter is fixedly installed on the outer side of the structure disc seat, the detection end of the tuning fork type online density meter penetrates to the inner side of the structure disc seat, and a discharging pipe and a laser ranging probe are fixedly installed on the bottom of the salt storage tank. The recycling screening mechanism is arranged, the buoyancy screening method is used, the recycling and classification of the plastic track material can be accurately completed, and the recycling value is greatly improved.

This invention discloses a frequency tuning method and resonator for a quartz crystal tuning fork oscillator. The method includes: a coating step: cleaning the quartz crystal blank and depositing a base metal layer after cleaning; a coarse tuning step: repeatedly printing conductive paste in the tuning area of ​​the tuning fork arm and curing it to form a printed tuning layer, adjusting the frequency of the tuning fork oscillator to a preset frequency range; and a fine tuning step: performing an excitation test to obtain the current frequency F1, using a laser to perform targeted ablation on the printed tuning layer, stopping when the frequency reaches the target value F2, thus completing the frequency tuning of the quartz crystal tuning fork oscillator. This invention adopts a layered coating architecture, abandoning the full vacuum process, and using a stacked structure of "one-time vacuum coating (base conductive / reflective layer) + two-time printed coating (tuning weight-adding layer)," which solves the problem of material waste and achieves nanometer-level precise frequency locking.

The application relates to the technical field of sound insulation screens, in particular to a highway photovoltaic sound insulation and power generation integrated device which comprises a sound insulation frame, a sound insulation screen and a sound insulation box, the sound insulation frame is internally provided with multiple layers of sound insulation screens, the back surface is fixedly connected with the sound insulation box, the upper surface of the sound insulation box is slidably connected with a sliding rod, the top end of the sliding rod is connected with a wing plate, the bottom end is connected with a magnetic plate, the magnetic plate is arranged in a movable cavity, a spiral coil one is wound outside the movable cavity, a sound insulation cavity is arranged in the middle of the sound insulation box, a tuning fork is arranged in the sound insulation cavity through a connecting rod, and the tuning fork is slidably connected with a permanent magnet block; and a spiral coil two is arranged on the inner wall of the sound insulation cavity. The highway photovoltaic sound insulation and power generation integrated device integrates sound insulation structures, photovoltaic power generation, wind power generation and sound wave power generation, realizes the noise blocking of highways, converts solar energy, natural wind energy and traffic noise energy into electric energy and stores and utilizes the electric energy, changes traditional sound insulation facilities from single sound insulation function into multifunctional integrated devices, and improves the comprehensive utilization value of highway auxiliary facilities.

Disclosed is an ultraminiature tuning fork quartz crystal and a resonator, the ultraminiature tuning fork quartz crystal comprises a tuning fork assembly, the tuning fork assembly comprises a fixing block, two vibrating parts and a connecting part, both of the vibrating parts extend outward and are symmetrically set through the fixing block and are connected to the fixing block, the connecting part comprises two connecting arms, and both of the connecting arms extend outward and are symmetrically set through the fixing block and are connected to the fixing block; an outer wall of the connecting arms is provided with at least one groove group for filling conductive silver glue, each groove in the groove group penetrates two adjacent sidewalls of the connecting arms. This disclosure can solve the problem that opening holes at the connecting end of the electrical connecting arms will weaken the strength of the electrical connecting arms.

The application discloses a kind of gas coal seam gas downhole coal dust concentration monitoring methods based on tuning fork sensing, belong to coal dust concentration monitoring technical field, comprising: S1 deployment downhole miniaturization tuning fork concentration sensor, S2 calibration and extraction pump coal dust concentration double-state operation threshold, S3 carries out signal remote transmission and edge analysis, S4 executes intelligent judgment, S5 closed-loop automatic control and S6 system integration and full-automatic closed-loop operation.The application can also be distributed to collect and identify flowing coal dust solution and static coal dust slurry on the basis of realizing the monitoring of coal dust concentration, and real-time sensing and intelligent early warning can be realized.

The application provides a humidity self-calibration gas analysis device and method, comprising: a tuning fork and a micro-wire; two ends of the micro-wire are bridged on two vibrating arms at the opening of the tuning fork; after the device is placed in a to-be-measured environment, a conductance spectrum corresponding to a resonance frequency of the tuning fork is used to determine the humidity of the to-be-measured environment, and a photoacoustic spectrum signal generated by the tuning fork under the action of an optical signal is used to determine the concentration of a to-be-measured gas in the to-be-measured environment; when the device is used to monitor the concentration of the to-be-measured gas in the to-be-measured environment, a first photoacoustic spectrum signal value measured by the tuning fork under different humidities when the concentration of the to-be-measured gas is a preset value is obtained in advance; then, the device measures a corresponding humidity value and a second photoacoustic spectrum signal value of the to-be-measured gas according to requirements, compares the second photoacoustic spectrum signal value with the first photoacoustic spectrum signal value corresponding to the humidity value, and determines whether the concentration of the to-be-measured gas changes. The application can perform humidity self-calibration and realize accurate analysis of the concentration of the to-be-measured gas.