33results about How to "Effective pickup" patented technology

A teleconference device includes a loudspeaker array and microphone arrays arranged at the both sides of the loudspeaker array. A plurality of focal points are set in front of the respective microphone arrays and symmetrically with respect to the center line of the loudspeaker array. A flux of sound collection beams toward the focal points is outputted. By calculating a difference between the sound collection beams toward the focal points symmetric with respect to the center line, a sound component coming into the microphone from the loudspeaker array SPA is cancelled. Furthermore, a total of squares of wave height value of the difference value for a particular time is used to estimate which of the set focal points is the nearest. Furthermore, by comparing the totals of squares of the wave height values of the sound collection beams toward the focal points symmetric to each other, it is possible to judge the position of the speaker.

The invention provides an earphone call noise reduction method and an earphone. In one embodiment, the method comprises the steps of receiving a plurality of first speech signals outside a human ear by at least one external microphone; receiving a second voice signal in the human ear through an inner ear microphone; converting the plurality of first voice signals and the second voice signal into afrequency domain; performing beam forming on the plurality of first voice signals to obtain a third voice signal; performing echo cancellation processing and spectrum continuation processing on the second voice signal to obtain a fourth voice signal; and calculating the signal-to-noise ratio of each frequency point in the third voice signal, performing weighting processing on the third voice signal and the fourth voice signal through the signal-to-noise ratio to obtain a fifth voice signal, and converting the fifth voice signal into a time domain and outputting the fifth voice signal. Under the complex acoustic scenes of low signal-to-noise ratio, more speaker interference and the like, the voice of a wearer can be effectively picked up, and other noises can be suppressed.

The invention discloses a synchronizing device for a switch cabinet local discharge multi-joint monitoring system. A main joint processor unit is used for enters the synchronizing signal emission modeby controlling a mode diverter switch, and pulse transmits wireless synchronous signals to each sub monitoring node through an antenna; after each sub monitoring node receives the synchronous pulse signal emitted by the main monitoring node, a sub joint signal conditioning unit rapidly triggers an analog-digital conversion unit, local discharge signals are measured, then, collecting signals are sent to the main node processor unit through a sub node digital communication unit, synchronized monitoring of multiple sub monitoring nodes installed on a multi-face switch cabinet is achieved, the problem that local discharge signal time sequences and voltage phase information cannot be accurately obtained in the current technical field of switch cabinet local discharge wireless monitoring is solved, the structure is simple, and the solid technical foundation is directly laid for local discharge positioning and local discharge mode recognition based on voltage phase information.

The invention discloses a cellphone motor vibration testing method, and the method comprises the steps: starting a cellphone motor and enabling the motor to start to work; picking up a motor vibration signal through a cellphone microphone, and converting the motor vibration signal into an electric signal; carrying out the spectral analysis of the electric signal collected by the microphone through an FFT algorithm, comparing the information of electric signal with a normal motor spectral information, and judging whether a test motor is working normally or not. Because the microphone of the cellphone is employed as a signal collection tool and the microphone and the vibration motor are disposed in a cavity of the cellphone, the method can pick up the motor vibration signal more effectively, greatly improves the anti-interference capability, carries out the spectral analysis of the data through the FFT algorithm, analyzes and judges the quality of the vibration function of the motor through analyzing and quantifying the specific indexes of the motor vibration: main frequency point, main frequency amplitude and noise amplitude, is more accurate and reliable in testing result, greatly simplifies the needed clamping tool and equipment, and reduces the testing cost.

The invention relates to a mechanical badminton ball picking trolley which comprises a body. Front wheel components are mounted at the front end of the body, the trolley travels through the front wheel components, the front wheel components are connected with a brush roller component through a transmission structure, the brush roller component is mounted on the body and connected with a conveying component through a transmission structure, the conveying component is obliquely mounted on the body, and a ball storage basket is mounted at the tail end of the conveying component. According to the trolley, labor intensity can be reduced, and badminton ball picking efficiency is improved.

The embodiment of the invention provides a voice signal enhancement processing method and an earphone. The method comprises the following steps of: acquiring a first voice signal and a second voice signal, wherein the first voice signal and the second voice signal are voice signals acquired based on a first position and a second position respectively, and the first position and the second positionare taken as an outside-ear voice signal acquisition point and an inside-ear voice signal acquisition point respectively; at least performing echo cancellation processing on the second voice signal to obtain a third voice signal; and fusing the third voice signal and the first voice signal to obtain a fourth voice signal, and outputting the fourth voice signal. The earphone comprises a first microphone, a second microphone and an audio processor. Through adoption of the voice signal enhancement processing method and the earphone, the voice of a wearer can be effectively picked up and other noises can be suppressed in complex acoustic scenes such as low signal-to-noise ratio and multi-speaker interference. Moreover, the earphone is small in size, is lighter, and is lower in production andmanufacturing costs.

The invention relates to the field of microphones, in particular to a unidirectional MEMS microphone and a production method thereof. The unidirectional MEMS microphone is composed of a PCB upper layer, a PCB middle layer and a PCB lower layer, wherein the PCB upper layer, the PCB middle layer and the PCB lower layer are assembled to form a sound cavity; a first sound hole and a second sound holewhich penetrate through the PCB upper layer are respectively fixed on the PCB upper layer; damping screen cloth is fixed at the positions, corresponding to the first sound hole and the second sound hole, of the end surface, far away from the PCB lower layer, of the PCB upper layer; the first sound hole is connected with the sound cavity, and the second sound hole is connected with the sound cavitythrough an air guide groove formed in the PCB middle layer, and an MEMS chip is fixed in the sound cavity; and the MEMS chip is connected with an ASIC chip fixed in the sound cavity through a bondingwire. External sound can reach the sound-sensing MEMS chip only through the first sound hole and the second sound hole, and directivity of microphone pickup is completed through the MEMS chip.

The present invention relates to the technical field of sensors and more particularly relates to a fault traveling wave signal coupling sensor for an online fault ranging device. The sensor includes ahousing, a wire winding framework, a coil, a signal board, a PG head, and a signal line. The wire winding framework is arranged in the housing, the coil is wound on the wire winding framework, the signal board is fixed in the housing, the coil is electrically connected to the signal board, a mounting hole is formed in the housing, the PG head is connected to the mounting hole, the signal line passes through the PG head to connect the signal board, and the signal line is fixed to the housing through the PG head. The fault traveling wave signal coupling sensor for the online fault ranging device provided by the invention has good market application value for ensuring the effectiveness of the online fault positioning device and improving the power supply reliability of a power grid.

Provided is an electronic device (100). The electronic device (100) includes a housing (301), a microphone (114), and a PCB (302), wherein the microphone (114) is sealed by a silicone sleeve and disposed on the PCB (302); the silicone sleeve is provided with a sound guiding hole (303), and the sound guiding hole (303) aligns to a sound pickup hole in the housing (203) to form a sound guiding channel; the housing is also provided with a USB jack (201) or a headphone jack (202), the USB jack (201) or the headphone jack (202) and the sound pickup hole (203) are on the same side of the housing (301); and a sound guiding groove (305) is further formed in the housing(301), and one end of the sound guiding groove (305) is communicated to the sound pickup hole (203), and the other end of the soundguiding groove (305) is communicated to the USB jack (201) or the headphone jack (202), so that when the microphone (114) picks up the sound, if the sound pickup hole (203) is blocked and cannot pickup the sound, the USB jack (201) and the sound guiding groove (305) in the housing (301) are communicated, and then the microphone (114) passes through the sound guiding groove (305) by means of theUSB jack (201), and then can normally pick up the sound through the sound guiding hole (303) in the silicone sleeve, thus ensuring the calling quality of the user, and also improving the calling experience of the user.

The invention relates to a noise reduction microphone. The noise reduction microphone comprises a cylindrical shell and a sleeve arranged at the front end of the shell, a baffle is transversely and integrally arranged in the middle of an inner cavity of the shell. The inner cavity is divided into a front cavity and a rear cavity by the baffle; the rear cavity is filled with rear sound absorption sponge, a hollow supporting rod is inserted into the middle of the rear sound absorption sponge, the front end of the supporting rod is provided with an installation base used for hanging and installing a microphone assembly, the front cavity is internally provided with front sound absorption sponge, and the front sound absorption sponge is communicated with the external environment through a soundinlet hole of the sleeve. The noise reduction microphone has the beneficial effects that the noise reduction microphone is simple in structure, low in cost and obvious in noise reduction effect, noise is reduced in a physical structure mode, damage is not likely to happen, noise reduction measures of places such as a customer service center are greatly simplified, and a large amount of equipmentand decoration cost are saved.

The invention discloses a fire truck cab local space active noise control system and method, and the system comprises an active controller, a secondary sound source, an error microphone, a noise reference microphone, a vibration reference sensor, and a control switch. The active controller is electrically connected with the error microphone, the noise reference microphone, the vibration reference sensor, the control switch and the secondary sound source. In order to improve the noise environment of a fire fighting truck cab, an active noise control system is installed according to the active noise control principle, the system is small in size and light in weight, comfort of passengers is effectively improved while other devices of the cab are not affected, and noise optimization is actually carried out on the fire fighting truck cab in an active noise control mode for the first time; the system is installed near the head area of a passenger, effectively picks up the primary noise of a target control area, and provides an accurate input signal for an adaptive algorithm.

The invention relates to a friction block production device and a friction block production method. The friction block production device comprises a mixing mechanism, a pressing and forming mechanismand a pressing and sintering mechanism, wherein the mixing mechanism mixes and stirs materials to form a mixed material; the pressing and forming mechanism comprises a pre-pressing mechanism and a primary pressing mechanism;, the pre-pressing mechanism pre-presses the mixed material, the primary pressing mechanism re-presses the pre-pressed mixed material and the pressure of the pre-pressing mechanism is smaller than a pressure value of the primary pressing mechanism; and the pressing and sintering mechanism pressurizes and sinters the pressed and formed mixed material. The friction block production device solves the problem that the compact density of a friction block is low and the friction block even has cracks as the compact will expands elastically to increase the volume as a result of release of elastic stress after an existing friction block is pressed.

The invention provides an African drum and a sound pickup device thereof. The sound pickup device comprises a supporting component installed inside a drum body and a piezoelectric acoustic sensor mounted on the supporting component; the piezoelectric acoustic sensor includes a piezoelectric guide sheet and a PCB; the piezoelectric guide sheet and an audio output port are electrically connected with the PCB; and the piezoelectric guide sheet is spaced apart from a drum head by a predetermined distance. According to the sound pickup device of the African drum of the invention, the piezoelectricacoustic sensor is directly assembled inside the drum body of the African drum, and therefore, the original timbre of the African drum will not be affected, and the timbre of the African drum in different ranges can be effectively picked up, and troubles brought about by a condition that a user arranges a microphone during drum playing to realize sound pick up and amplification can be avoided, theoutput of high-fidelity sound quality can be ensured, the user can easily and effectively amplify the sound of the drum to adapt to the performance of different occasions, the improvement of performance can be benefitted, and good user experience can be ensured.

The invention discloses a novel low-loss belt-type telescopic digging finger buckwheat picking device. A core mechanism of the device adopts a telescopic digging finger mechanism which is integrated in a front roller of a toothed belt picking device, and a flexible bottom plate is designed at the bottom of a picking table; and the device comprises the following main structures: telescopic diggingfingers (1), a driven roller (2), a chain wheel (3), a contour wheel (4), a picking belt (5), the flexible bottom plate (6), picking teeth (7), a driving roller (8), an auger (9), a baffle (10), a scraping plate conveyor belt (11), and an outer shell (12); the telescopic digging fingers (1) are integrated in the driven roller (2), and the telescopic digging fingers (1) and the driven roller (2) rotate at a same angular speed; the driven roller (2) is in drive connection with the driving roller (8) through a chain, and the driven roller (2), the auger (9) and the scraping plate conveyor belt (11) are separately installed on the outer shell (12) through a central shaft; and the flexible bottom plate (6) and the baffle (10) are fixed on the outer shell (12). The picking device provided by theinvention has the advantages of easy swath sending, clean picking and low grain dropping loss, and effectively reduces a picking loss rate.

A seismic horizon automatic extraction method based on dynamic programming is characterized by comprising the following steps: step 1, obtaining an initial horizon near a target seismic horizon to besolved; step 2, taking the initial horizon as a center, selecting a window with a proper size, and selecting a small area containing a target horizon; step 3, according to the initial horizon, flattening the image of the selected small area; step 4, searching a global optimal path in the small area by using a dynamic planning method; and step 5, inversely transforming the obtained optimal path into an initial coordinate space to obtain an optimized target seismic horizon of the required solution. According to the method, the correct seismic horizon can be effectively picked up, and even the seismic horizon with the consistent phase can still be accurately and automatically tracked in a complex discontinuous area in seismic data. Detailed geological structure information can be well revealed, the calculation cost can be greatly reduced, and time is saved.

The invention relates to the field of sound guiding device accessories, and discloses a sound guiding device complete set accessory, which comprises a sound guiding head, a sound guiding needle and afixing frame, and is characterized in that the sound guiding head comprises a cover cap, a connecting pipe and a connecting head, the right end of the cover cap is in left-hand threaded connection with the interior of the left end of the connecting pipe, and the left end of the connecting head is fixedly connected with the right end of the connecting pipe. The sound guide device is a complete accessory. An earphone pickup head of the pickup is fixed between the cover cap and the connecting pipe; the sound guide head is hermetically connected with the earphone wire; reducing debris intrusion, affecting tone quality effects, the sound guide tube can be closer to a position needing sound pickup; the pickup effect of the pickup can be enhanced; when the sound guide needle is used, the sound guide sleeve on the new sound guide needle needs to be directly connected with the sound guide head, the sound guide head does not need to be replaced, the application range of the device is wide, the fixing rod can fix and limit the sound guide sleeve and the sound guide tube, the sound guide sleeve and the sound guide tube are more convenient to place, and the sound guide needle is more convenientto store when not used.

The invention provides an earphone call noise reduction method and an earphone. In one embodiment, the method comprises the steps of receiving a plurality of first speech signals outside a human ear by at least one external microphone; receiving a second voice signal in the human ear through an inner ear microphone; converting the plurality of first voice signals and the second voice signal into afrequency domain; performing beam forming on the plurality of first voice signals to obtain a third voice signal; performing echo cancellation processing and spectrum continuation processing on the second voice signal to obtain a fourth voice signal; and calculating the signal-to-noise ratio of each frequency point in the third voice signal, performing weighting processing on the third voice signal and the fourth voice signal through the signal-to-noise ratio to obtain a fifth voice signal, and converting the fifth voice signal into a time domain and outputting the fifth voice signal. Under the complex acoustic scenes of low signal-to-noise ratio, more speaker interference and the like, the voice of a wearer can be effectively picked up, and other noises can be suppressed.

The invention relates to a bundled fiber fracture sound measuring device and method adopting symmetric displacement of tandem pickups. The device is composed of the pickups arranged in a tandem lineararray, an information collecting module and an analysis system, the number of the tandem pickups is m, and each pickup is composed of a parabolic semispherical cover and a micro microphone arranged on the focal point of the parabola. The method adopting the measuring device comprises the steps that when a fiber bundle is stretched to crack, the crack sound is transferred to the closest pickup with the highest sound energy to be recorded. According to the crack pulse measured by the pickup, the number of the cracking fibers in the area and the sound intensity of the cracking fibers can be obtained, the number of the highest pulse values measured by all the pickups at the same time is the total number of the cracking fibers and the approximate area of cracking of the fibers, and the cracking degree of a single fiber is determined according to the peak value. The sound measuring device can serve as a functional assembly on a bundled fiber strength tester or independently used, and can beused for measuring the average cracking intensity, variation coefficient and average cracking elongation at break of the single fiber.

The invention relates to the field of sound guiding device accessories, and discloses a sound guiding device complete set accessory, which comprises a sound guiding head, a sound guiding needle and afixing frame, and is characterized in that the sound guiding head comprises a cover cap, a connecting pipe and a connecting head, the right end of the cover cap is in left-hand threaded connection with the interior of the left end of the connecting pipe, and the left end of the connecting head is fixedly connected with the right end of the connecting pipe. The sound guide device is a complete accessory. An earphone pickup head of the pickup is fixed between the cover cap and the connecting pipe; the sound guide head is hermetically connected with the earphone wire; reducing debris intrusion, affecting tone quality effects, the sound guide tube can be closer to a position needing sound pickup; the pickup effect of the pickup can be enhanced; when the sound guide needle is used, the sound guide sleeve on the new sound guide needle needs to be directly connected with the sound guide head, the sound guide head does not need to be replaced, the application range of the device is wide, the fixing rod can fix and limit the sound guide sleeve and the sound guide tube, the sound guide sleeve and the sound guide tube are more convenient to place, and the sound guide needle is more convenientto store when not used.

The invention belongs to the field of agricultural machinery, and particularly relates to a reciprocating multi-directional straw cutting and crushing device with the function of length screening, including a frame assembly (1), a gearbox (3), a transmission assembly (4), a picking and conveying assembly (6), screenable reciprocating chopping and crushing device (7) and non-directional throwing assembly (8); the transmission assembly (4) includes a left primary chain drive (41), a right primary Chain transmission (42), secondary chain transmission (43) and crank connecting rod transmission mechanism (44); described picking up conveying assembly (6) includes picking up roller (60), profiling picking up knife (61), conveying roller ( 62) and delivery spring teeth (63); the screenable reciprocating chopping and crushing device (7) includes a crushing knife (70), a crushing screen (71) and a crushing screen mounting plate (72); the non-directional The throwing assembly (8) includes a throwing drum (80), a throwing vane (81), a guide vane (82) and a throwing drum shaft (84).

The invention belongs to the field of cam shaft nondestructive detection equipment and discloses a cam shaft leakage flux probe follow-up tracking device. The device comprises a base, a swing arm, a swing block and a leakage flux probe assembly. The device is characterized in that one end of the swing arm is connected to the base and can swing up and down around a connection point; the other end of the swing arm is connected with the swinging block; a spring, the leakage flux probe assembly and a group of guiding wheels are arranged on the swinging block; the spring is used for adjusting the up-down position of a leakage flux probe in a self-adaption mode; the group of the guiding wheels are used for contacting the periphery of a cam shaft to be detected; the leakage flux probe assembly isused for detecting leakage magnetic fields generated by defects on the cam shaft to be detected; a probe in the leakage flux probe assembly is arranged on a central line extension line among the group of the guiding wheels, so that the probe can be always along the normal direction of the cam shaft to be detected in a detection process. According to the cam shaft leakage flux probe follow-up tracking device disclosed by the invention, floating fit between the leakage flux probe and the surface of a cam is achieved, and tracking signals in the detection process are eliminated; the cam shaft leakage flux probe follow-up tracking device has the advantages of ingenious structure, high detection flexibility, good stability and the like.

The invention discloses a single reinforcement spiral spring piece and particularly relates to the field of geophones. The single reinforcement spiral spring piece is applied to a hanging system of a geophone and characterized by comprising process reinforcement in an Archimedes helix shape and arranged between an inner circular ring and an outer circular ring. The process reinforcement rotates from outside to inside with the rotation angle being 689-738 degrees, and the width of the process reinforcement is decreased from 0.854 mm-0.884 mm to 0.756 mm-0.786 mm from outside to inside. According to the single reinforcement spiral spring piece, the data collecting requirement of high-resolution exploration is met, the natural frequency of the geophone is reduced, seismic exploration deep-layer and low-frequency effective information is effectively picked up, and the fidelity of seismic wave data collecting is improved. By means of the single reinforcement spiral spring piece, the natural frequency of the geophone can reach 1 Hz, and accordingly field usage is more convenient.

The invention relates to a clamp for pickup. The clamp comprises a straight crossbar and a bent folding bar. The middle portion of the crossbar is hinged to the middle of the folding bar. The left upper portion of the crossbar and the left upper portion of the folding bar are each provided with texture. A spring for connecting the crossbar with the folding bar is arranged between the left portion of the crossbar and the left portion of the folding bar. The clamp is convenient to use, capable of facilitating workers to effectively pick up objects in narrow space and stable in the pick-up process and has the effects of preventing the falling-off of the objects and manual slipping.

The invention relates to a straw poking device after compacting straws by a tractor tire. The straw poking device is arranged between a rear wheel of a tractor and a straw returning machine, and a plurality of straw poking devices and tractor tracks are correspondingly arranged on the front end surface of a returning machine shell of the straw returning machine; each straw poking device comprisesfixed square steel, a U-shaped clamp, a fixed plate, a spring threaded pressing rod, a threaded disc, a supporting plate, a rotating pin, a poking plate, a spring pressing block, a spring and a threaded pressing block. The device has multiple modes for adjusting an inclination angle of the poking plate, and is simple and convenient to operate; during returning operation, when the straw poking device encounters hard stones, the poking plate can pass through smoothly by compressing the spring; when the straw poking device leaves the hard stone, the poking plate is reset by the spring, so that the operation effect and the service life of the straw poking device can be effectively ensured; and the included angle between the two poking plates can be adjusted according to the field operation environment, so that the straw poking operation quality is improved.