122results about How to "Avoid loud noise" patented technology

The invention relates to a visible light image and infrared image fusion processing system and a fusion method. The fusion processing system comprises an image acquisition module, an image fusion module and an image display module, wherein the image fusion module is connected with the image acquisition module and the image display module. By adoption of the fusion method, the fusion ratio of a visible light image to an infrared image can be adjusted according to requirements, and detailed images are filtered and compared and then enhanced, so that detail information of a fused image is improved, and noise interference is avoided. Furthermore, fusion weights of the visible light image and the infrared image and the detail enhancement degree can be flexibly controlled through external parameter adjustment, and thus various display requirements are met.

The invention discloses a difference double-interference type optical fiber gyroscope based on birefringence modulation. The optical fiber gyroscope comprises a light source, a modulator, a coupler, an optical fiber ring, a polarization beam splitter, a first detector and a second detector, wherein the light source and the modulator are welded at a melting point O1 with an angle of 45 DEG; the modulator and a port A of the coupler are welded at a melting point O2 with an angle of 45 DEG; an end C of the coupler and one end of a polarization-maintaining optical fiber ring are welded at a melting point O3 with an angle of 0 DEG; an end D of the coupler and the other end of the optical fiber ring are welded at a melting point O4 with an angle of 90 DEG; an end B of the coupler and an input end of the polarization beam splitter are welded at a melting point O5 with an angle of 0 DEG; and two output ends of the polarization beam splitter are respectively welded to the first detector and the second detector. According to the invention, closed-loop control of the difference double-interference type optical fiber gyroscope is realized; and a wide-spectrum light source with very weak coherent characteristics is adopted, thereby avoiding strong noise brought by various stray wave interferences which are caused by strong coherent characteristics of a laser light source.

The invention discloses a sound mixing method of live broadcast software, and aims at acquiring audio data sources of played accompaniment audios during sound mixing and performing sound mixing processing on the audio data sources and user audios collected by using microphones. The invention further provides a sound mixing device and system of the live broadcast software and a computer readable storage medium. Visibly, when sound mixing is carried out, the method does not collect audios outputted by speakers and perform echo cancellation as in the conventional sound mixing method, but directlyacquires audio data sources of played accompaniment audios, thereby solving the problem of relatively large noise when the audios output by the speakers are collection on one hand, and avoiding the problem of collecting audios of users connected with microphones in the acquisition process on the other hand, so that echo cancellation and background noise suppression do not need to be carried out on the accompaniment audios in the sound mixing process and then the quality of the sound mixed audios is enhanced.

The invention discloses a differential dual-interference type closed loop fiber optic gyroscope based on birefringence modulation of a wide frequency light source. The differential dual-interference type closed loop fiber optic gyroscope comprises the light source, a first coupler, a second coupler, a first polarization beam splitter, a first modulator, a second modulator, a second polarization beam splitter, a fiber optic loop, a third polarization beam splitter, a first detector and a second detector. The differential dual-interference type closed loop fiber optic gyroscope has the advantages that closed loop control of the differential dual-interference type fiber optic gyroscope is realized; as the wide frequency light source with a very weak coherence characteristic is adopted, strong noise brought by various stray wave interference caused by a strong coherence characteristic of a laser light source is avoided; a SAGNAC effect is doubled; and the differential dual-interference type closed loop fiber optic gyroscope has a mature technical foundation and can satisfy a relatively high precision requirement.

The invention provides a photoelectric oscillator which comprises a DFB laser device, a delay optical path and a photoelectric mixing feedback loop. The DFB laser device is used for generating local oscillator optical signals. The delay optical path is used for delaying the local oscillator optical signals. The photoelectric mixing feedback loop is used for carrying out down-converting processing on the local oscillator signals and input optical carrier waves to obtain low-frequency electrical carrier waves, filtering the electrical carrier waves in a narrow-band mode, carrying out up-converting processing on the delayed local oscillator optical signals and the filtered electric carrier waves, and outputting optical carrier waves. Optical delay generated by the delay optical path and electrical delay generated by the photoelectric mixing feedback loop are matched so as to eliminate phase noise attached to the local oscillator signals on the output optical carrier waves. The method of electrical assistance is utilized, a Q value up to 1.4*10<7> is achieved equivalently, intracavity delay and gain are provided by an electric device, and sensitivity to environment factors caused by long optical fibers and loud noise caused by an optical amplifier are avoided.

The invention discloses an air conditioner as well as a frequency control method and device thereof. The method comprises the following steps of obtaining frequency variation of an existing compressor; determining target operation frequency according to the relationship of the temperature difference of the current room temperature and a set room temperature and a first set threshold value if frequency variation of the existing compressor is greater than zero and when operation frequency of the compressor regulated according to the frequency variation of the existing compressor is within a frequency hopping band range; determining target operation frequency according to the relationship of temperature difference of the current room temperature and the set room temperature and a second set threshold value if the frequency variation of the existing compressor is smaller than zero and when operation frequency of the compressor regulated according to the frequency variation of the existing compressor is within the frequency hopping band range; and controlling the compressor to operate according to the target operation frequency. The frequency control method can be applied to solve the problems such as great temperature fluctuation, frequent compressor lifting and the like caused by improper frequency hopping band processing in frequency control in the prior art.

A face seal is provided with a constriction ring around a rubber boot that constricts the normal outward bulging of the flex section of the rubber boot as it folds and tries to roll forward over itself during axial deflection. The constriction caused by the constriction ring provides for increased frictional hysteresis during compression and decompression of the boot flex section. This increased hysteresis increases the dampening capacity of the seal design and, therefore, reduces undesired vibrations and seal noise generation.

This invention provides a low-noise reactor with its core made up of multiple lamination steel plates dipped with paint, in which, these plates have related leaning faces fixed by binders after leaning with each other directly or with multiple pads, paint binding the lamination steel plates on the leaning faces is removed, then a binder is filled between the leaning faces of the plates or between the lamination plates and the pads then to be cured.

A face seal is provided with a constriction ring around a rubber boot that constricts the normal outward bulging of the flex section of the rubber boot as it folds and tries to roll forward over itself during axial deflection. The constriction caused by the constriction ring provides for increased frictional hysteresis during compression and decompression of the boot flex section. This increased hysteresis increases the dampening capacity of the seal design and, therefore, reduces undesired vibrations and seal noise generation.

A control device for a compression-ignition engine is provided, in which partial compression-ignition combustion including spark ignition (SI) combustion performed by combusting a portion of mixture gas inside a cylinder by spark-ignition followed by compression ignition (CI) combustion performed by causing the rest of the mixture gas inside the cylinder to self-ignite is executed within a part of an operating range of the engine. The device includes a detector configured to detect a parameter related to noise caused by the combustion inside the cylinder, an EGR (exhaust gas recirculation) controller configured to change an EGR ratio being a ratio of exhaust gas introduced into the cylinder, and a combustion controller configured to control the EGR controller to increase the EGR ratio when a noise index value specified based on the detected parameter of the detector is confirmed to exceed a given threshold during the partial compression-ignition combustion.

The invention discloses an air conditioner outdoor unit fixed frame with a damping function. The air conditioner outdoor unit fixed frame comprises a base plate; a supporting plate is fixedly connected to the middle part of the upper surface of the base plate; a groove is formed in the middle part of the upper surface of the support plate; an air conditioner outdoor unit main body is placed on thesupport plate; the middle part of the bottom surface of the air conditioner outdoor unit main body is fixedly connected with a limiting plate; and the bottom end of the limiting plate extends into the groove. In the air conditioner outdoor unit fixed frame with the damping function, the air conditioner outdoor unit main body can be preferably buffered and damped during operating so as to solve the problem of high noise in use; the position of the air conditioner outdoor unit main body can be preferably limited to prevent the staggered falling problem in the use process; a connecting rod can be preferably pushed through tension of a second spring; and the air conditioner outdoor unit main body can be preferably clamped by a clamping block when the second spring presses the connecting rod,so that the air conditioner outdoor unit main body is buffered and damped.

A control device for a compression-ignition engine is provided, in which partial compression-ignition combustion including spark ignition (SI) combustion performed by combusting a portion of mixture gas inside a cylinder by spark-ignition followed by compression ignition (CI) combustion performed by causing the rest of the mixture gas inside the cylinder to self-ignite is executed within a part of an operating range of the engine. The device includes a detector configured to detect a parameter related to noise caused by the combustion inside the cylinder, an EGR (exhaust gas recirculation) controller configured to change an EGR ratio being a ratio of exhaust gas introduced into the cylinder, and a combustion controller configured to control the EGR controller to increase the EGR ratio when a noise index value specified based on the detected parameter of the detector is confirmed to exceed a given threshold during the partial compression-ignition combustion.

The invention discloses intelligent kitchen terminal equipment based on the internet. The intelligent kitchen terminal equipment based on the internet comprises a shell, a main fan, an exhaust duct, a control module, a man-machine interaction panel, an image acquisition unit and an audio directional acquisition unit, wherein the image acquisition unit comprises a camera, an image acquisition channel, an image acquisition hole and a purging motor; the audio directional acquisition unit comprises a first subunit and a second subunit; the first subunit faces a cooking activity area and is used for acquiring sound produced by cooking activity so as to avoid wind noises of the main fan as much as possible; and the second subunit faces an activity region of cooking operators, and is used for acquiring voices of the cooking operators to avoid the wind noises of the main fan as much as possible. The camera is prevented from being polluted by lampblack and water vapor, the video quality is high, and the sound recording effect is good.

A linear driver is provided and particularly, but not exclusively, to a linear driver for use in the field of civil engineering or construction, for example in the formation of piles or piers as foundations. The driver includes a weighted sleeve slidable relative a driving member, and a valve arrangement to control the linear movement of the weighted sleeve relative to the driving member. Closing the valve arrangement serves to stop movement of the weighted sleeve and transfer momentum to the driving member without physical impact between the weighted sleeve and the driving member.

The invention discloses a horizontal pulverizer with shock-absorbing function, which comprises an outer drum, the outer drum is cylindrical, the bottom of the outer drum is left and right symmetrically fixedly connected with a shock-absorbing base, and the right side of the outer drum is provided with a feeding hole , the inside of the outer drum is connected to the inner drum through bearings, the inner drum is cylindrical, the right side of the inner drum is open, the inner side of the right end of the inner drum is fixedly connected with a retaining edge, and the retaining edge and the inner drum are connected by welding. There are several screening holes on the outer side of the middle part of the drum, and the inner side of the screening holes is fixedly connected with a screen mesh, and the screen mesh and the screening hole are connected by threaded connection. Compared with the prior art, the beneficial effects of the present invention are: the present invention is simple in structure, easy to use, can reduce the vibration caused by crushing during crushing production, avoid excessive noise, and at the same time, the device will be qualified when crushing and grinding. The raw materials are screened out without re-screening, which is worth promoting.

The invention discloses an underwater image enhancement method for optimizing CLAHE. The method comprises the following steps: (1) a preprocessing process; (2) an HE treatment process; (3) an adjustedCLAHE treatment process; and (4) image re-synthesis, and enhanced image output. According to the method, core parameters in a traditional CLAHE algorithm are optimized, so that the method is more suitable for an application scene of underwater image enhancement. The HE algorithm and the CLAHE algorithm are used in a mixed mode, the overall color of the image is recovered, detail features are moreobvious, and the phenomenon that noise points are large due to the AHE algorithm is avoided. The algorithm does not depend on a complex mathematical model, does not use a huge algorithm, is small incalculation amount, does not need training, is quick in execution, reduces the requirements for the performance of a processor, and is suitable for the transplantation and implementation of various types of underwater embedded platforms.

The optical disk player of the present invention is capable of controlling rotational speed of an optical disk, on the basis of a shape of the optical disk, so as to stably and efficiently write data in and read data from the optical disk. The optical disk player comprises: a motor for rotating the optical disk; and an optical pickup for irradiating a laser beam to the optical disk and receiving a reflected beam reflected therefrom. A CPU analyzes signals included in the reflected beam so as to recognize a shape of the optical disk. A servo processor controls rotational speed of the optical disk on the basis of the shape of the optical disk recognized by the CPU.

The invention relates to a transmission mechanism in a closed cleaning tank, which comprises a driving motor, a motor fixing seat, a transmission shaft and an eccentric wheel, wherein the driving motor is fixedly welded on the motor fixing seat on the wall of the cleaning tank, one end of the transmission shaft is connected with the output shaft of the motor, the other end of the transmission shaft is connected with a driving gear after extending into the vacuum cleaning tank, and a sealing ring is arranged between the transmission shaft and a transmission shaft sleeve; the eccentric wheel is fixed on the driving gear, one end of a connecting rod is connected to the eccentric wheel, and a driven gear is welded on a driven-gear fixing plate on the wall of the tank. The invention has the advantages that uniform and thorough cleaning in the working process is ensured, and overlarge noise is avoided; the power is transferred into a vacuum tank body and then divided for transmission through a sealed structure, thereby the cost can be lowered; and a chain transmission mechanism, a gear transmission mechanism, a crank block mechanism and the like arranged on the device can be changed by changing the rotating speed of the driving motor.

The invention discloses an industrial camera with good heat dissipation performance, relates to the technical field of industrial cameras, and aims to solve the problem of poor heat dissipation performance in the prior art. A containing box is arranged on one side of a machine shell. A cooling liquid container is mounted in a fixing ring; a water-cooling circulating pump is mounted above the cooling liquid container; a liquid inlet is formed in one end of the water-cooling circulating pump; a liquid outlet is formed in one end below the cooling liquid container; a chipset is arranged on one side of the interior of the machine shell. A host is arranged on the other side of the interior of the machine shell; an optical filter is mounted on one side of the host; heat dissipation bases are installed on the inner side of the host and the inner side of the chipset correspondingly, heat dissipation fins are arranged on one sides of the heat dissipation bases, a heat dissipation fan is installed between the host and the chipset, a coiled pipe is installed at the upper end of the interior of the machine shell, a first heat dissipation window is arranged above the machine shell, and a secondheat dissipation window is arranged above the containing box.

The invention discloses an indoor air purification device capable of controlling the air intake volume, which comprises an air purifier, a left air inlet of the purifier, a right air inlet of the purifier, a right air inlet pipe, an air volume control valve, a front right air inlet pipe, Front right air inlet, front left air inlet, front left air inlet pipe, left air inlet pipe, left air inlet, right air inlet and purifier air outlet. The advantage of the present invention is that the air intake volume of the purifier can be controlled. When the indoor air environment is very turbid and the indoor air needs to be purified as soon as possible, the purpose of fast air intake can be achieved by increasing each air volume control valve; when a large air intake volume is not required , you can reduce or directly close one or several air volume control valves to achieve the purpose of reducing the air intake.

The present invention discloses a control method of an electromagnetic heating system. The control method comprises the following steps of: controlling an electromagnetic heating system to enter a first heating period and a second heating period, wherein each heating period comprises a discharge phase, a heating phase and a stop phase, in the discharge phase of the first heating period, a drive circuit is controlled to output M first pulse signals to a power switch tube, and in the discharge phase of the second heating period, the drive circuit is controlled to output N second pulse signals tothe power switch tube; and recording the number of pulses which cannot meet a preset condition in the M first pulse signals by employing a first counter to obtain a first counting value, and recording the number of pulses which cannot meet the preset condition in the N second pulse signals by employing a second counter; and determining whether the drive circuit is abnormal or not according to a first counting value and a second counting value so as to effectively detect the abnormal condition of the drive circuit and reduce the loss. The present invention further discloses an electromagneticheating system and an electromagnetic heating device.

The invention provides a vibration-absorbing type concrete stirrer convenient in cleaning and for a building. The vibration-absorbing type concrete stirrer comprises a base, wherein a vibration-absorbing device is arranged at the lower end of the base; a supporting seat is provided with a stirring drum, a top plate is fixed at the upper end of the stirring drum and a spring is connected and arranged between the stirring drum and the supporting seat; an agitator is fixed at the upper end of an inner cavity of a top seat; a water feeding pipe is arranged at the upper end of the inner cavity of the top seat; a discharging pipe is arranged at the lower end of the stirring drum in a communicating manner; a collecting dish is arranged on the base; an automatic feeder is arranged at the upper-left side of the base. The vibration-absorbing type concrete stirrer provided by the invention has the advantages that the stirring drum is set into a hopper shape and is arranged below the agitator, sothat fast mixing of concrete and water can be realized and simultaneously the discharging is convenient; in the stirring process, due to fast vibration of a vibrating motor, complete mixing and discharging are convenient, and the concrete can be prevented from being adhered to the inner wall of the stirring drum; the vibration-absorbing type concrete stirrer has the characteristics of simple structure, strong practicability and good mixing treatment effect.

The invention discloses a cup lid assembly for a stirrer and the stirrer with the same. The cup lid assembly for the stirrer comprises a cup lid and a measuring cup; a center hole is formed in the cup lid; the measuring cup is installed on the cup lid and seals the center hole in a covering mode, the lower portion of the measuring cup is arranged on the inner side of the center hole in a matched mode, an air flow channel is defined between the measuring cup and the inner circumference surface of the center hole, the peripheral edge of the upper portion of the cup lid abuts against the cup lid, multiple notches arranged in the circumferential direction of the measuring cup at intervals are formed in the peripheral edge of the measuring cup, and space is defined between the notches and the cup lid to communicate the air flow channel with the outer side of the cup lid. According to the cup lid assembly for the stirrer, noise and energy consumption are low, and the noise reducing and energy saving effects are achieved.

The embodiment of the invention provides a vehicle body air pressure release valve control system, method and device. The system comprises an air pressure release valve and a control module, wherein the air pressure release valve is provided with a conventional ventilation row plate and a standby ventilation row plate; the opening and closing states of the standby ventilation row plate are controlled through the control module. The control module is used for acquiring a pressure difference value inside and outside the automobile if the automobile is judged to be in a standing automobile door closing working condition; if the pressure difference value between the interior and the exterior of the automobile is larger than a set threshold value, a standby ventilation exhaust plate of the airpressure release valve is controlled to be opened; if it is judged that the automobile is in the driving working condition, a standby ventilation exhaust plate of the air pressure release valve is controlled to be closed. According to the air pressure release valve, the opening area of the air pressure release valve can be adjusted in a self-adaptive mode according to different use working conditions of an automobile, and the problems that when the automobile is closed in a standing mode, the ear pressing feeling occurs, the door closing sound quality becomes poor, the door closing resistancebecomes large, and when the automobile runs at a high speed, noise in the automobile becomes large are solved.

The invention provides a check valve special for a gas pipeline. A first seal ring plate and a second seal ring plate are fixedly arranged in a pipe body of the gas pipeline and correspond to arcs of the inner wall of the pipe body. The two seal ring plates are arranged in the axial direction of the pipe body in a staggered manner. Besides, the top end of the first seal ring plate exceeds the center axis of the pipe body 1, and the tail end of the second seal ring plate does not reach the center axis of the pipe body. A valve plate is rotationally arranged between the first seal ring plate and the second seal ring plate. The valve plate is connected with a rotating shaft, wherein the rotating shaft is eccentrically arranged in the pipe body. A stop bar limiting the overturning amplitude of the valve plate is further arranged in the pipe body. When a roots blower normally starts, after an rated pressure is obtained, the valve plate of the check valve is normally opened; when the roots blower stops, because of the dead load generated by an eccentric structure and the gas pressure, the valve plate is rapidly closed, and therefore the phenomenon that backflow high-pressure gas caused when the roots blower rotates reversely enters the roots blower, and then the roots blower rotates oppositely and is damaged is avoided; and in this way, the use safety performance is greatly improved.

The invention provides an anti-collision door sticker. The door sticker is that a soft rubber block is arranged on an elongated sticking base block. When the door sticker is used, the soft rubber block is sticked and fixed at the collided position between a door or a frame or a wall body through the sticking base block, direct collision between the door or the frame or the wall body can be relieved and buffered during opening and closing, and damage and produced noise are avoided.

The invention discloses a cooking utensil. The cooking utensil comprises a pot, a cover and a heating device, wherein the pot is provided with a cooking cavity with the open top; the cover is movablymounted to the pot between the closing position and the opening position, the cooking cavity is closed when the cover is at the closing position, the cooking cavity is opened when the cover is at theopening position, and the cover is provided with an air exhaust hole; the heating device is used for heating air in the cooking cavity so that the air is exhausted from the air exhaust hole after expanding due to heat, and after cooling of the air in the cooking cavity, negative pressure is formed in the cooking cavity. According to the cooking utensil provided by the invention, the effect of vacuum negative pressure can be achieved, so that the cooking effect of the cooking utensil is improved, the cooked food is more delicious, in addition, an air extracting pump does not need to be mounted,so that the structure of the cooking utensil is simple, meanwhile, the cost is reduced, and moreover, the problem that the air extracting pump is large in noise and short in life is solved.

The invention discloses a full-automatic ramie bidirectional stripping machine comprising a ramie conveyor, a front stripping machine and a rear stripping machine. The ramie conveyor includes a conveyor frame, a feeding conveyor, a ramie uniformizing device and a ramie feeding device, and the feeding conveyor, the ramie uniformizing device and the ramie feeding device are installed on the conveyorframe; the ramie stripping machine includes a hemp stripping machine frame, a ramie clamping and conveying device and a ramie stripping mechanism, and the ramie clamping and conveying device and theramie stripping mechanism are installed on the hemp stripping machine frame; the output end of the feeding conveyor is connected with the input end of the ramie uniformizing device, the output end ofthe ramie uniformizing device is connected with the input end of the ramie clamping and conveying device, and the output end of the ramie feeding device is connected with the input end of the ramie clamping and conveying device. According to a ramie stalk conveyor of the present invention, continuity of the ramie stalks, automatic completion of ramie uniformization, cutting, rolling and strippingcan be realized; and meanwhile, the ramie bidirectional stripping machine can realize bidirectional stripping of the ramie stalks through two ramie stripping devices staggered fore and aft, and the clamped and conveyed part of the ramie stalks can be stripped, thereby improving the utilization rate of the ramie stalks and improving the stripping efficiency from the ramie stalks to ramie fibers.