148results about How to "Change vibration frequency" patented technology

The invention relates to a sound-insulating, ventilating and heat transfer enhancing acoustic metamaterial structural unit, which comprises a frame, wherein a restraining body is arranged inside the frame, and at least one of the upper and lower surfaces of the frame is coated with a thin film; and at least one hole is formed in the restraining body and the thin film. In addition, the invention provides an acoustic metamaterial composite plate and an acoustic metamaterial composite structure comprising the acoustic metamaterial structural unit, as well as a frequency modulation method and an assembly method. The acoustic metamaterial structural unit has sound insulation capability superior to that of an ordinary perforated plate or micro-perforated plate within a broadband, can ensure that sufficient heat flow, air flow or liquid flow can pass through smoothly, and increases heat diffusion rate of fluid media on both sides of holes and accelerates heat convection efficiency through unit localized vibration generated by the structure under excitation of acoustic waves. The acoustic metamaterial structural unit and the array composite structure have the advantages of simple assembly technology and stable working performance.

The invention provides a novel variable-rigidity semi-active pipeline vibration absorber which comprises a circular clamping ring and a main vibration absorber body. The novel variable-rigidity semi-active pipeline vibration absorber is characterized in that the main vibration absorber body comprises four sub vibration absorber bodies symmetrically arranged on the outer surface of the circular clamping ring; each sub vibration absorber body comprises two leaf springs, an inertia mass block and laminated polyvinylidene fluoride (PVDF) actuators arranged on the upper surface and the lower surface of each leaf spring; and a flat ring structure is formed after the two leaf springs of each sub vibration absorber body are in butt joint, one end of the flat ring structure is connected with the circular clamping ring, and the other end of the flat ring structure is connected with the inertia mass block. The novel variable-rigidity semi-active pipeline vibration absorber is convenient to install, simple in structure, high in reliability and wide in applicable frequency band range, the frequency of the vibration absorber can be adjusted according to the change of the pipeline vibration frequency, and therefore the requirements for vibration reduction and noise reduction of pipelines are met. The novel variable-rigidity semi-active pipeline vibration absorber is valuable particularly in meeting the acoustic stealth requirement of pipeline systems of modern ships and submarines.

The invention discloses a washing machine provided with a multifunctional water inlet box and a control method of the washing machine provided with the multifunctional water inlet box. The washing machine comprises a washtub and a water injection opening. The water inlet box used for dissolving and diluting a washing solution and washing objects is arranged between the washtub and the water injection opening. An ultrasonic transducer is arranged at the bottom of the water inlet box and connected with an ultrasonic wave generating power board for providing variable high-frequency power for the ultrasonic transducer. The water inlet box is provided with a water inlet, a first water outlet, a second water outlet and pipe control devices, wherein the water inlet is connected with a washing water injection opening, the first water outlet is connected to the washtub, the dissolved and diluted solution flows out through the first water outlet, the second water outlet is connected to a water drainage pipe, cleaning fluid flows out of the washing machine through the second water outlet, and the pipe control devices are used for controlling flowing of the solution and the fluid. Different programs for driving the water inlet box to work are selected according to different functions. The multifunctional water inlet box integrates the additive dissolving function and the object washing function, the time for a user to wash the objects such as glasses and jewelry is saved, and the washing functions of the washing machine are increased while the washing effect of the washing machine is improved.

The invention relates to a hydraulic self-induced vibration subsoiler. The hydraulic self-induced vibration subsoiler is characterized by comprising a machine frame and a subsoiling device, wherein the subsoiling device is arranged at the bottom of the machine frame, the machine frame is composed of suspension pair plates, a front beam, a rear beam, an inclined traction rod, a cross beam, a cross traction rod, U-shaped groove fixing pieces and V-shaped locking pieces, and the subsoiling device is composed of shovel points, shovel wings and shovel handles. According to the hydraulic self-induced vibration subsoiler, the stretch and retraction amount of vibration springs is controlled and adjusted through hydraulic oil, the embedded depths of all subsoiling shovels are effectively adjusted, in this way, the tilling depth consistency is guaranteed during subsoiling, and the overall vibration which causes discomfort of a driver of a tractor and the like and is generated due to inconsistency of shake of mechanisms of the subsoiler is reduced; compared with a non-vibration subsoiler and a one-way vibration subsoiler under the same condition, during work, the traction resistance is remarkably reduced; to sum up, the hydraulic self-induced vibration subsoiler can reduce resistance and save energy and is good in operation effect and high in adaptability.

The invention relates to the technical field of building test devices. The invention particularly relates to a civil engineering structure anti-seismic test device. The device comprises a bottom plate, a first side plate and a second side plate are arranged on the side face of the bottom plate. The first side plate and the second side plate are perpendicular to each other. Excitation motors are arranged on the inner side faces of the first side plate and the second side plate. A cam is arranged on an output shaft of the excitation motor; the excitation motor is arranged on the fixed plate; twosliding rods are arranged on the fixing plate, two sliding holes are formed in each of the first side plate and the second side plate, the sliding rods penetrate through the sliding holes, a threadedhole is formed below the position between the two sliding holes, a screw rod is connected into the threaded hole in a threaded mode, the inner end of the screw rod is connected with the fixing plate,and a longitudinal wave generating plate is welded to the upper ends of the stand columns together; according to the device, vertical longitudinal waves and horizontal transverse waves can be generated for simulating the earthquake state, the simulated longitudinal waves are closer to the earthquake state, and the accuracy of the earthquake resistance test is effectively ensured.

The invention provides a tidal current energy and vortex-induced vibration energy comprehensive power generation device. The tidal current energy and vortex-induced vibration energy comprehensive power generation device comprises a tidal current energy water turbine and a vortex-induced vibration energy capturing device. A power generator, a power distribution box and a rectifying and voltage-stabilizing device which are sequentially connected with an impeller through wires are arranged in a power generator cabin of the tidal current energy water turbine. The vortex-induced vibration energy capturing device comprises a shell, a vibrator sliding along a guide rail, and a piezoelectric plate, wherein the shell is mounted on the rear side of a single pile foundation, the two end edges of the vibrator are arranged on the top surface and the bottom surface of the shell, and the two ends of the piezoelectric plate are connected with the vibrator and the rear end face of the shell correspondingly; and a conductive copper sheet is arranged at the end, connected with the rear end face of the shell, of the piezoelectric plate and sequentially connected with the rectifying and voltage-stabilizing device and the power distribution box located in the power generator cabin through wires. Water flow enters the shell after encountering the single pile foundation of the water turbine, vortexes falling alternately are generated on the two sides of the pile foundation, and vortex resonance is formed when the vortexes pass through the vibrator; and under the wake flow galloping effect, the vibration amplitude of the vibrator is greater than the vibration amplitude caused by resonance of ordinary vortexes, the vibrator drives the piezoelectric plate to swing left and right, and thus mechanical energy is converted into electric energy.

The invention relates to the technical field of engineering machinery and discloses a double steel wheel road roller and a frequency-converting vibration control device thereof. The frequency-converting vibration control device comprises a first vibration motor and a second vibration motor which are serially connected with each other, wherein the first vibration motor is in parallel connection with a first split-flow branch; the flow, which flows by the first vibration motor, can be changed by the first split-flow branch; the second vibration motor is in parallel connection with a second split-flow branch; and the flow, which flows by the second vibration motor, can be changed by the second split-flow branch. In the frequency-converting vibration control device provided by the embodiment of the invention, a front vibration motor and a rear vibration motor are respectively in parallel connection with one split-flow branch so as to control the flow which flows by the front vibration motor or rear vibration motor, thereby controlling the vibration frequency of a front / rear wheel of the road roller, eliminating a beating vibration phenomenon, reducing power consumption, promoting road-rolling efficiency, being capable of adjusting the frequency of the front / rear wheel at any time by a vibration loop according to requirements, realizing various working states (multi-frequency double-amplitude) and expanding a use scope of the road roller.

The invention provides a device for carrying out a pigging dynamic response experiment on a natural gas pipeline cable-suspension structure. A transparent toughened glass pipe is connected with seamless steel pipes through flanges; a main cable is connected with towers as a main bearing component; fixing brackets can be used for fixing the seamless steel pipes, and are placed on a flat plate; a connecting rod can be driven to move up and down through the rotation of a cam below the flat plate in order to drive the flat plate to move up and down, thereby realizing upward and downward vibrationof a pipeline; and an acceleration sensor and a displacement sensor of a signal testing device can be arranged at corresponding positions of the seamless steel pipes according to testing needs. The device is mainly designed for researching the dynamic response and the influence on the two-phase flow of pigging during pigging of the natural gas pipeline cable-suspension structure, and can acquire the vibration acceleration, vibration displacement and the like of the pipeline cable-suspension structure under different pigging conditions, and simulate the influences of the pipeline on the two-phase flow pattern of pigging under different vibration conditions.

The invention discloses a Lamb wave sensor. The sensor comprises a substrate layer, a ground electrode layer, a piezoelectric film, at least one pair of first microelectrodes and at least one pair ofsecond microelectrodes with antibodies for surface modification; the antibodies for surface modification of the second microelectrodes and target biological markers in a sample are combined, in orderto realize concentration determination of the target biological markers. The Lamb wave sensor has the advantages of high sensitivity, high specificity, low detection limit, easy operation, and the like, and can be used for realizing detection of a plurality of target biological markers of the same sample. The invention discloses a biological detection chip; the chip comprises the Lamb wave sensor,and can be used for detecting of a plurality of biological markers in a blood sample; the biological detection chip has simple operation and small volume, and is suitable for production in batch; theproduct is suitable for large scale early diagnosis and screening of diseases. The invention also discloses a rapid screening system; the system comprises a biological detection chip, and provides anew rapid screening system for diagnosis and screening of diseases.

The invention discloses a receiver and an assembling process thereof. The receiver comprises a shell, a diaphragm mechanism and an electromagnetic drive mechanism. The diaphragm mechanism is arranged in the casing, which has a fixed frame, a reed and a sound film, and the sound film is pre-fixed on the fixed frame; the electromagnetic drive mechanism includes coils arranged parallel to the diaphragm mechanism, which are installed on the coils one by one and connect the coils to each other. The electromagnetic wire that generates the magnetic field is transformed from the direction parallel to the diaphragm mechanism to the transformation member in the vertical direction. The assembly process is as follows: the first coil with the conversion piece is installed on the first casing, the first magnet is fixed on the conversion piece; the second magnet is fixed on the inner wall surface of the second casing, and the two magnets are opposite and face each other. The polarity of one end is reversed; install the diaphragm mechanism on the inner wall of the housing. The diaphragm mechanism is used as a single module as a whole. When installing the receiver, the diaphragm mechanism only needs to be fixed on the shell through the fixing frame, which simplifies the installation process of the receiver. The conversion piece reduces the height occupied by the coil within the receiver.

The invention relates to a vibrating sieve, in particular to a flexible horizontal vibrating sieve. Balancing weights are arranged on an eccentric shaft, the eccentric mass change of the eccentric shaft is achieved, the vibrating form is flexible, and the amplitude is more flexible and changeable. The balancing weights with different masses can be selected to vibrate according to the type of ore,and thus the motion track can be switched between the straight line and the oval. Vibration exciters are arranged in different places on a sieve box, thus amplitude of the device at different positions can be adjusted slightly, and thus the device is applicable to different use occasions. The installing angle of the horizontal vibrating sieve is between -10 DEG C and +10 DEG C, the installing angle of the device is more flexible, and the suitable installing angle is selected according to the needed ore falling speed. The horizontal vibrating device is simple in structure, easy to assemble anddisassemble, convenient to debug and maintain, and capable of adapting to different working conditions.

The invention discloses a parallel mechanism based single drive one-translation two-rotation three-dimensional sand filling vibration-compaction machine. The machine comprises a fixed pedestal, a movable platform, a driving branch chain I and a driven branch chain II; the driving branch chain I and the driven branch chain II are respectively positioned at the left and right sides of the fixed pedestal; the two ends of the driving branch chain I are respectively connected to the fixed pedestal and the movable platform; the two ends of the driven branch chain II both are connected to the fixed pedestal; and the driven branch chain II is connected to the movable platform via a rotation pair R2. When a single drive is applied to the driving branch chain I, the movable platform can simultaneously carry out a three-dimensional vibration form of vertical vibration, deflection vibration and pitch vibration; the vibration-compaction machine has the characteristics of single input and multiple outputs, and is simple in structure, convenient in manufacturing and maintenance, energy-saving and reliable; through regulating a displacement drive on a moving pair, the vibration frequency and amplitude of the vibration platform can be changed; and by combining with a sand filling process, the fuse sand filling compactness is improved, and the fuse production efficiency is improved.

The invention discloses an electric toothbrush, which comprises a main body part and a brush head, wherein the main body part and the brush head are flexibly connected through a movable part, and theelectric toothbrush further comprises a motor; a steel wire, wherein the first end of the steel wire is connected to the output shaft of the motor, and can rotate along with the output shaft; and an eccentric shaft arranged inside the movable part, wherein the first end of the eccentric shaft is connected to the second end of the steel wire, and rotates along with the steel wire, the second end ofthe eccentric shaft is connected to the movable part in the manner of the radial moving of the movable part along with the second end of the eccentric shaft, the steel wire has at least a bending section, and the bending section is defined in the same plane. According to the present invention, the steel wire with the structure is arranged between the eccentric shaft and the motor so as to changethe axial position and the radial position of the eccentric shaft, such that the vibration frequency and the vibration amplitude of the brush head are changed so as to meet different requirements on vibration.

The invention relates to a two-dimensional pile soil interaction experiment system based on PIV technology and an experiment method. The system comprises a two-dimensional vibration generating structure capable of controlling vibration force amplitude and vibration frequency, and the two-dimensional vibration generating structure is arranged on a plane; the system further comprises a data collecting and processing module applying PIV technology and in communication connection with the two-dimensional vibration generating structure through a data line. By the system and the method, vibration frequency, force amplitude, pile foundation rigidity, pile foundation buried depth, soil saturation and uniformity can be changed directly or indirectly, and impact of the above factors on soil movementcan be researched; soil particle movement process can be measured by adopting a noncontact way without damaging undisturbed soil.

The invention discloses a novel beam vibrating frequency recognition system and method. The recognition system is composed of a vibrating frequency recognition assembly (101) and a vibrating frequency generating assembly (102), wherein the vibrating frequency generating assembly (102) can give out frequency signals of needed vibrating frequency on a beam (1), and vibrating signals with different frequencies can be given out by adjusting a signal generator (5); the vibrating frequency recognition assembly (101) can perform frequency sweeping in the 10-10100 Hz frequency band on a second piezoelectric ceramic chip (3) through an impedance analysis meter (4), the second piezoelectric ceramic chip (3) senses the vibrating signals in the frequency sweeping process, the piezoelectric impedance values of the impedance analysis meter (4) have the characteristic similar to same-frequency resonance, and the vibrating frequency signals which are transmitted by the medium beam (1) and given out by the vibrating frequency generating assembly (102) are found through graph changes of vibrating points in frequency sweeping.

The invention discloses vehicle anti-fatigue driving equipment based on big data. The equipment comprises a big data fatigue monitoring system and an anti-fatigue reminding system which are integratedwith vehicle driving. The anti-fatigue reminding system comprises a driver seat, an electric shock stimulation plate and a vibratory massage anti-fatigue mechanism. A secondary safety protection bellyband is also arranged on the side surface of the driver seat. A safety belt integrated clamping plate used for fixing a second-level safety protection bellyband is arranged on the side face of the driver seat, a respiratory rate monitoring module is arranged on the portion, close to the tail end, of the second-level safety protection bellyband, and a bellyband tying monitoring module is arrangedon the safety belt integrated clamping plate. The implementation method of the anti-fatigue equipment comprises: identifying gender and age information of a driver; performing bellyband fastening reminding; monitoring the respiratory rate in real time; starting a vibratory massage anti-fatigue mechanism at regular time; performing fatigue stimulation. According to the scheme, the subjective initiative of an anti-fatigue implementation mode is improved, the fatigue of a driver can be actively relieved, and the effectiveness and stability of anti-fatigue implementation are improved.

The invention discloses a vibrating diaphragm mechanism applied to a receiver. The vibrating diaphragm mechanism comprises a fixed frame, a reed and a voice diaphragm. The fixed frame comprises a hollow inner cavity. One end of the reed is a root side which is connected with the fixed frame by means of a fixing end, gaps are formed between other side edges and the fixed frame, and the reed is arranged in the hollow inner cavity in a suspended manner. The edge shapes of the side edges, corresponding to the gaps, of the reed are determined according to vibrating frequencies required by the reed. The reed does reciprocating vibration under the driving of an electromagnetic mechanism. The voice diaphragm is fixed on the fixed frame and covers the reed, so as to seal airflow channels which are formed by the gaps and positioned between the upper and lower surfaces of the fixed frame and the reed. The edge shapes of the side edges, corresponding to the gaps, of the reed are determined according to the vibrating frequencies required by the reed, that is, the edge shape of the suspended end, opposite to the fixed end, on the reed is changed, so as to change vibrating frequencies required by high pitch when the reed vibrates, thus a point of resonance of the reed and the air transfers, thereby improving the high-frequency performance of the receiver.

The invention discloses a multidimensional vibration sorting system with intelligent frequency modulation. The multidimensional vibration sorting system comprises a vibration plate, a base plate, a vibration mechanism and gravity sensors; the gravity sensors act on the vibration plate and recognize the gravity change at a specified position on the vibration plate; the vibration mechanism has two or more vibration frequencies, and / or has two or more vibration amplitudes, and / or has two or more vibration modes; and the vibration mechanism drives the vibration plate, and when the gravity sensorsrecognize that the gravity at the specified position on the vibration plate has a specified change, the vibration frequencies and / or vibration amplitudes and / or vibration modes of the vibration mechanism are switched. In the multidimensional vibration sorting system, by arranging the vibration plate, a circular groove, an elastic paint layer and a high-elastic baffle, collision between accessoriesand the wall surface of the circular groove and collision between the accessories can be conveniently prevented during vibration sorting of the accessories in the vibration plate, and wear of precision accessories is prevented; and as the gravity sensors act on the vibration mechanism, gathering and mutual collision of the precision accessories are reduced, and wear caused by mutual collision ofthe precision accessories is reduced.

The invention provides a keyboard type string pulling device and relates to a component for musical instruments. The keyboard type string pulling device comprises keys, string pressing arms, a string stretching frame, a straight bow and a transmission belt, wherein strings are arranged on the string stretching frame through the a string frame and a string fastening device; one end of the string stretching frame is provided with an arc-shaped spring piece, and the other end of the string stretching frame is provided with wheels, the wheels are pressed on a slide way; the string pressing arms are long rods with bent front part, and the lower ends of the bent parts are placed on the string stretching frame; the front ends of the keys are arranged below the rear ends of the string pressing arms; and the straight bow is arranged on the transmission belt and placed below the strings and vertical to the strings based on a horizontal plane. According to the keyboard type string pulling device, a plurality of groups of keys, string pressing arms and string stretching frames are integrally combined to form a keyboard type string instrument. With the adoption of the keyboard type string pulling device, the performing effect of the keyboard instrument can be improved.

The invention discloses a method and a device for changing a motor vibration frequency based on an environment and a mobile terminal. The method comprises the following steps: detecting an environmental volume around the terminal; and adjusting the vibration frequency of a terminal motor according to the detected environmental volume. According to the method and the device, the vibration frequency of the terminal motor is changed by detecting the environmental volume around the terminal, so that the vibration of the terminal motor can be changed according to the change of the environment, and the user experience effect is improved.

The invention discloses an earthquake simulation method for children's earthquake prevention education. A vibration simulation generating device and different building block houses are used to simulate an earthquake scene; the power is output to eccentric wheel mechanisms through meshing transmission between gears to allow eccentric wheels to rotate; and vibration plates are arranged above the eccentric wheels, and the vibration plates are always in close contact with the eccentric wheels under the action of tension springs. When the eccentric wheels rotate, the vibration plates vibrate upwardand downward. A plurality of vibration plates are used to form a vibration surface, and an elastic rubber pad is attached onto the vibration surface for simulating the state of the earth's surface during an earthquake. Compared with the prior art, the earthquake simulation method for children's earthquake prevention education achieves the effect of simulating earthquake prevention after innovative anti-vibration devices are added on the building block houses, and can stimulate learning interest and innovative thinking of the children through experimental phenomena and building of the buildingblock houses.

The invention provides a string vibration period experiment instrument with a vibration motor as a wave source. The string vibration period experiment instrument with the vibration motor as the wave source aims to solve the technical problems that according to an existing string vibration experiment instrument, an equipment structure is complicated, manufacturing cost is high, a dead zone exists during an experiment, the experiment efficiency is low, and the demonstration effect is poor. The string vibration period experiment instrument with the vibration motor as the wave source comprises an experiment instrument body. A base is arranged at the bottom of the experiment instrument body, and a vibration motor assembly is installed on the experiment instrument body. The vibration motor assembly is installed on a supporting stand column through a fixing flat plate. The vibration motor is installed in the vibration motor assembly. An eccentric block is installed on the right side of an outer rotating shaft of the vibration motor. A speed measurement disk and a photoelectric door are installed on the left side of the outer rotating shaft of the vibration motor. A direct-current power source speed measurement instrument is installed on the right side of the base. A voltage adjusting and frequency adjusting power source and a motor speed measurement instrument are installed on the direct-current power source speed measurement instrument. The voltage adjusting and frequency adjusting power source is provided with a voltage adjustment and frequency adjustment alternation switch, a power switch and the like. The motor speed measurement instrument is provided with a power supply switch, a frequency switch and the like. When the string vibration period experiment instrument with the vibration motor as the wave source is used, through the steps of power source connection, voltage adjustment and the like, the string vibration frequency is obtained by measuring the vibration frequency with the vibration motor as the wave source finally. The string vibration period experiment instrument with the vibration motor as the wave source has the advantages of being reasonable in structure and easy to popularize.

The invention discloses a pressure-storage frequency-varying device which is realized by virtue of the following technical scheme: the upper side of an annular base (10) is provided with a pneumatic cylinder (2) sealed by virtue of a chassis (4); the pneumatic cylinder is capable of pushing a valve shaft (15) fixedly connected with the center of an upper end cover out of a central hole of a flange plate of the pneumatic cylinder by virtue of the upper end cover (1) connected to the pneumatic cylinder; a corrugated pipe assembly (3) is capable of converting external pressure changes into telescopic motion of the upper end cover; the upper end cover compresses the corrugated pipe assembly under the effect of the external pressure changes, the corrugated pipe assembly stretches to push the upper end cover so as to open a valve; fixed frequency generated by volume of an inner cavity of the pneumatic cylinder and the vibration frequency of a transfusion pipeline of a propelling system are changed by virtue of external pressure, so that the generated longitudinal vibration frequency is isolated from the structure frequency, and generation of longitudinal vibration coupling of the propelling system is prevented. The pressure-storage frequency-varying device has the advantage that the strength, flexibility and use temperature range of the corrugated pipe assembly are improved.

The invention relates to the technical field of automobile vibration absorption structures and control methods, in particular to an automobile dynamic vibration absorption system and a control method. The automobile dynamic vibration absorption system comprises a vibration absorption unit, a signal acquisition unit and a control unit, wherein the vibration absorption unit is used for absorbing vibration of a controlled system; the signal acquisition unit is used for acquiring a vibration frequency of the controlled system; the control unit is used for adjusting an inherent frequency of the vibration absorption unit according to the obtained vibration frequency so as to absorb the vibration of the controlled system; the vibration absorption unit comprises a shell fixed on the controlled system; an iron core and a first electromagnetic coil capable of applying a vertical induction force to the iron core are arranged in the shell; at least one group of damping-adjustable damping units controlled by the control unit is arranged between the iron core and the shell; and the first electromagnetic coil is connected with the control unit and is controlled by the control unit. According to the vibration absorption system of the invention, the rigidity and the damping coefficient can be adjusted in real time according to the actual vibration frequency of the controlled system, so that frequency adjustment in a wide frequency domain is achieved, and the problems that a traditional vibration absorber is single in frequency and cannot be adjusted in real time are solved.

The invention discloses a damping oil pressure damper for connection nodes in a steel structure, which comprises a front pull rod, a rear pull rod and a tubular node box, wherein the node box is of aclosed structure, the inner cavity of the node box is filled with damping oil to form an oil cavity, the middle of the oil cavity in the node box is sleeved with a piston body in a matched manner, andthrust springs are respectively connected between a movable spring seat and a fixed spring seat on two sides of the piston body; a sliding pipe is axially fixed at the axial center position of the piston body, two ends of the sliding pipe are respectively matched and sleeved in sliding sleeves at the two ends and are capable of sliding, and strip-shaped oil-saving holes are formed in the side surfaces of the sliding sleeves at the two ends. According to the invention, when the front pull rod and the rear pull rod of the node box are pulled or compressed, the piston body inside the node box can be driven to move in the axial direction, and then the sliding pipe is driven to slide in the sliding sleeve, so that oil resistance change adjustment can be automatically carried out, vibration frequency and vibration amplitude of the nodes are changed, and energy can be effectively dissipated and vibration can be reduced.

The invention discloses a device for improving the quality of English pronunciation by touch, including a base. A groove is arranged in the upper side wall of the base. A limit rod is fixedly connected between the inner walls of the two sides of the groove. A threaded rod is rotationally connected between the inner walls of the two sides of the groove. One end of the threaded rod penetrates the side wall of the base, and is fixedly connected with a second handle. An audio player, a power amplifier, a database, a motor, a cam, an inserting rod and sponge cloth are arranged. An audio signal of the database is amplified by the power amplifier and then played by the audio player, an electrical signal is transmitted to the motor through a vibration sensor, the motor drives the cam to rotate, the cam drives the inserting rod to move, and the inserting rod contacts the sponge cloth to generate vibration. Therefore, vibration is generated, and users can feel the pronunciation according to thesense of touch. As the amplification of the power amplifier differs each time, the rotation speed of the motor can be improved, and the frequency of vibration can be changed.

The invention discloses a receiver and its assembly process. The receiver includes a shell, a diaphragm mechanism and an electromagnetic drive mechanism. The diaphragm mechanism is arranged in the shell, which divides the inner cavity of the shell into an installation cavity and a sound cavity; the diaphragm mechanism has a fixed frame, a reed and a sound film, and the sound film is pre-fixed on the fixed frame independently of the shell; the electromagnetic The drive mechanism is used to generate an electromagnetic field to drive the reciprocating vibration of the suspended end of the reed in the diaphragm mechanism. The assembly process is as follows: fix the first coil on the inner wall of the first casing perpendicular to the diaphragm mechanism; install the diaphragm mechanism on the inner wall of the first casing or the second casing, or the first casing and the second casing On the opposite mouth edge of the casing, a distance is reserved between the first coil and the diaphragm mechanism. Since the sound membrane is pre-fixed on the fixing frame independently of the housing, the diaphragm mechanism as a whole is a separate module. When installing the receiver, the diaphragm mechanism only needs to be fixed on the housing through the fixing frame, thus simplifying the installation process of the receiver.

The invention discloses a deicing device and a deicing method for a power transmission line. The deicing device is used for removing ice on the power transmission line, the deicing device comprises an air compressor, a deicer and an unmanned aerial vehicle, the deicer is connected with a traction rope and an insulating air pipe, the unmanned aerial vehicle is used for enabling a traction rope to bypass a power transmission line and land on the ground, the traction rope is used for pulling the deicer to the position below the power transmission line, the other end of the insulating air pipe is connected with an air compressor, the deicer is provided with a piston, the air compressor provides air flow to drive the piston to do reciprocating motion, a controller assembly is arranged at the joint of the insulating air pipe and the air compressor, the controller assembly is used for controlling starting and stopping of airflow output and the output quantity, a guide device is arranged on the upper surface of the deicing device, and the deicing device can more effectively remove icing on the power transmission line.

The invention belongs to the research field of the optical fiber micro-nanotechnology, in particular to an optical-driven vibration motor device capable of stably changing the position and the vibration frequency of absorbent particles. The device comprises an optical tweezers system consisting of a first optical fiber light source, a second optical fiber light source, an optical fiber wavelengthdivision multiplexer and a single-mode optical fiber, and the optical tweezers system, an absorbent black sphere and liquid form the optical-driven vibration motor device. Two kinds of photophoretic forces are used to play an optical driving role on the absorbent particles, the absorbent black sphere can be stably captured in a non-contact mode, and the position and the vibration frequency of theabsorbent black sphere driven by the optical-driven vibration motor can be controlled. The position and the vibration frequency of absorbent particles can be changed and driven at the same time through changing the power of two light sources; the position of the device is accurately controlled and the structure is simple; the absorbent particles in the liquid background can be easily optically driven; and the adopted device is low in price, the making method is simple, and the device is suitable for being promoted in the field of biomedicine.