31 results about "Industrial noise" patented technology

The invention discloses a robot voice control system in the noisy condition environment and relates to the industrial robot voice control technology field. In the noisy condition environment, throughcombination of local noise reduction processing and online voice identification, man-machine collaboration is accomplished. The system comprises an online voice meaning identification data platform, amobile client, a local voice control device and an industrial collaboration robot, wherein system networking is realized through the mobile client, the local voice control device is integrated with amicrophone array module to effectively overcome the noisy industrial environment, a voice signal is acquired and transmitted to a voice data core module, after noise reduction, the signal is transmitted to the online voice meaning identification data platform based on depth learning, online voice identification is realized, identification data is returned to the local voice control device, data processing is carried out, the data result is transmitted to the industrial collaboration robot, analysis is carried out through the robot, and instruction motion is further carried out. The system isadvantaged in that the noisy condition environment can be overcome, outstanding use performance is realized, and the application scope is wide.

The invention discloses a gas valve inner leakage detection method based on acoustic emission signal processing. Firstly, an acoustic emission sensor is used for collecting signals, filtering processing is conducted through a signal amplifier, enhanced acoustic emission analog signals are obtained, converted into digital signals through a data acquisition card and sent to a computer, and the computer records root-mean-square value parameters of the acoustic emission signals in real time; a one-point method acoustic emission signal collection inner leakage analyzing and judging method, a two-point method acoustic emission signal collection inner leakage analyzing and judging method and a four-point method acoustic emission signal collection inner leakage analyzing and judging method are adopted in sequence, and whether inner leakage exists on a valve or not is judged according to the root-mean-square value of valve inner leakage acoustic emission signals. The gas valve inner leakage detection method is applied to the field of gas valve inner leakage detection, has high practicability, is reasonable in cost and high in detection efficiency, does not affect normal production and reduces the influences, on production detection, of industrial noise.

The invention discloses a particle board resonance sound absorption structure. The particle board resonance sound absorption structure comprises pore plates and a bottom plate located behind the pore plates. Cavities between the bottom plate and the pore plates form the resonance sound absorption structure. The pore plates are particle sound absorption plates. The particle sound absorption plates comprise particles and binding agents. The outer surfaces of the particles are covered with the binding agents to form binding agent layers. Gaps between the particles covered with the binding agents form sound absorption pores. The particle board resonance sound absorption structure can be of a single-layer structure or a double-layer structure or a multilayer structure. The sound absorption performance of the resonance sound absorption structure can be correspondingly influenced by changing the particle sizes of the particle sound absorption plates; the actual measurement performance of the resonance sound absorption structure is approximate to the theoretical sound absorption characteristics of a micro perforated board sound absorption structure with the same parameters, so the corresponding particle board resonance sound absorption structure can be designed according to the application environment. The particle board resonance sound absorption structure is large in sound absorption coefficient, wide in sound absorption frequency band, simple in manufacturing process and capable of being widely applied to various noise control fields such as indoor sound absorption treatment, industrial noise control and railway sound barriers.

The invention discloses a testing device of a grinding wheel and an operation method of the testing device. The testing device of the grinding wheel comprises a frame; a spindle driven by a servo mechanism is arranged on the frame; a lead rail is also arranged on the frame; a clamping mechanism is arranged on the lead rail through a transmission mechanism in a sliding manner; a torque sensor and a current transformer are also arranged on the spindle; an industrial noise sensor is arranged on the frame or the spindle; the grinding wheel is arranged on the spindle; a master controller with a touch screen is also arranged on the frame; the servo mechanism, the transmission mechanism, the torque sensor, the current transformer and the industrial noise sensor are electrically connected with the master controller respectively; the spindle is transversely arranged at one side of the lead rail, and the grinding wheel is towards the clamping mechanism. According to the testing device, the performance parameters, such as abrasive ratio, sharpness, cutting force and loss power, of the grinding wheel can be rapidly obtained, and the testing device has the characteristics of being simple and reasonable in structure, high in automatic degree and accurate to measure.

The invention discloses a motor bearing fault diagnosis method based on single sample learning, and belongs to the technical field of computers. The diagnosis method comprises the following steps: setting different sample numbers of each class and adding different noise intensities; carrying out data expansion on the existing one-dimensional vibration signal of the motor bearing; sending the processed data as input into a network for training and network parameter iterative updating; and performing fault diagnosis on the test sample so as to judge the model performance. According to the invention, learning is carried out based on a single sample of a twin network, so that the problem of low precision caused by data shortage during motor bearing fault diagnosis can be well solved; therefore, the phenomenon of industrial noise frequently occurring in a working condition environment can be solved, the feature information of the signal can be better extracted, and the improved multi-scale one-dimensional convolutional network fusion and LSTM combined method is adopted to extract the global features and local features of the signal, so that fault diagnosis is better carried out. The method has the advantages of high applicability and high stability.

A device and method for the continuous monitoring of otoacoustic emissions (OAE) levels on an individual worker uses as a pair of earpieces each featuring an external microphone, an internal microphone and a pair of miniature receivers. An adaptive filtering noise rejection processing of the measured distortion product OAE (DPOAE) is used to further improve the Signal-to-Noise ratio in frequencies where passive isolation remains insufficient. The adaptive filtering noise rejection technique relies on a Normalized Least-Mean-Square (NLMS) algorithm that uses the ipsilateral external microphone and the contralateral internal microphone to reject the noise from the measured DPOAE signals for each in-ear OAE probe. A DPOAE signal extraction algorithm provides for an increase in results reliability on a greater dynamic range in DPOAE magnitudes than known methods of DPOAE signal extraction. The device and method is suitable for the continuous monitoring of workers' hearing capabilities in industrial noises up to 75 dB(A).

The invention discloses a cooperative physical layer privacy protection method of a multi-user relay network downlink. The method comprises the following steps that a legal user node Um and a cooperative user node Uk are selected, a source node S and the legal user node Um send an information symbol xs and an industrial noise signal Wm to a relay node R respectively, and meanwhile the cooperative user node Uk sends an artificial noise signal Wk(1) to the relay node R; 2, the relay node receives a mixed signal yR sent by the legal user node Um, the cooperative user node Uk and the source node S, the mixed signal yR is amplified and then transmitted to all user nodes, and meanwhile the cooperative user node Uk sends an artificial noise signal Wk(2); and 3, the legal user node eliminates self-interference according to the received signal to acquire a sufficient statistic ym(rem) used for detecting the symbol, and then the information symbol xs is estimated according to the sufficient statistic ym(rem) used for detecting the symbol. According to the method, the information transmission security of the multi-user relay network downlink can be ensured.

The invention discloses an airport noise conversion device, which mainly comprises a noise collection tube, a vibrating diaphragm, a vibrating diaphragm mounting tube, a coil, a magnet group, a magnet mounting plate, two tension springs, two radial regulation bolts, a radial regulation spring, a spring ejector sleeve, an integral mounting sleeve, a rear cover and an axial regulation screw rod. The airport noise conversion device provided by the invention can convert noises into electric energy which can be used for electrical equipment such as airport illuminating lamps, signal lamps, indicator lamps and the like to greatly reduce the noises in the vicinity of an airport, save energy, reduce emission and make waste profitable. In addition, the device has the advantages of simple structure, low cost, high reliability and the like, is easy to operate and maintain, and can be popularized to the fields of ground traffic noise control, industrial noise control and the like so as to realize a wide application range.

The invention discloses a multifunctional grinding machine dust collector device. The multifunctional grinding machine dust collector device comprises a grinding machine which is arranged on the ground; a magnetic adsorption assembly in which metal chips are collected is arranged on the side surface of the grinding machine; the magnetic adsorption assembly is connected with a protective cover of the grinding machine through a suction tube; a filtering port is formed in one end of the suction tube in an embedded manner; an air filter is installed at the upper end of the magnetic adsorption assembly; an object storage box is arranged on the upper side of the air filter; a power assembly is arranged at the side edge of the magnetic adsorption assembly; the inlet end of the power assembly is connected with and is fixed to the outlet end of the air filter; a first outer box housing is fixed to the outside of the magnetic adsorption assembly; a second outer box housing is fixed to the outside of the power assembly; and acoustic boards are installed on the inner walls of the outer box housings. According to the multifunctional grinding machine dust collector device, the metal chips and dust which are generated by the grinding machine can be quickly and accurately disposed, gas meeting the national standards is exhausted finally, and the multifunctional grinding machine dust collectordevice has the functions that the industrial noises are reduced, and the vibration is reduced.

The invention discloses a carbon dioxide station air conditioner driven by industrial noise, belonging to the technical field of air conditioning. The air conditioner comprises an air conditioning host machine, an indoor heat exchanger and an outdoor heat exchanger. The air conditioning host machine comprises a columnar transduction cavity. The front end of the transduction cavity is sealed through a pressure resistance vibration film. The noise of the machine is received through a flared sound pressure amplifier. The rear end of the transduction cavity is communicated with a resonant cavity through a resonant tube. Liquid carbon dioxide is filled in the transduction cavity. A plurality of axial transduction plates arranged at intervals are arranged in the transduction cavity. A hot end heat exchanger is fixed at the front end of the transduction plates. A cold end heat exchanger is fixed at the rear end of the transduction plates. A circulation water path of the outdoor heat exchanger flows through the inner cavity of the hot end heat exchanger. A circulation water path of the indoor heat exchanger flows through the inner cavity of the cold end heat exchanger. According to the air conditioner disclosed by the invention, the air conditioner is simple in structure and high in reliability; the noise level of industrial factory buildings can be effectively reduced; air temperatures of stations can be adjusted according to requirements; and a comfortable working environment is created for operators.

The invention discloses a novel four-microphone industrial noise source positioning system. The system comprises a quaternary microphone array, three wide-angle cameras, a multi-channel acquisition conditioning device, a cloud, a GCC module and a user client, wherein microphones are fixedly mounted at four corners of the multi-channel acquisition conditioning device. According to the sound source positioning system, a device-cloud-client Internet of Things architecture is adopted, data collected by the quaternary microphone array and data collected by the three wide-angle lenses are all transmitted to the cloud and are processed respectively, three pictures shot at the same time are processed into a panorama at the cloud, and audio signals are directly uploaded to the client and are sent to a positioning module for processing, and a scanning interval is determined through pre-sound source positioning, then precise positioning is performed by using a precise sound source positioning algorithm, and finally a positioning result is combined with a panorama to form a panoramic sound image, and the panoramic sound image is uploaded to a client in real time, so a user can intuitively judge the working condition of equipment conveniently.

Embodiments of the present invention disclose a soft sensor modeling method in an industrial process. The method comprises the steps of obtaining modeling data used for the soft sensor modeling method in the industrial process as to-be-processed data, selecting training data according to the weight, establishing a soft sensor sub-model by using a single intelligent method, and obtaining a soft sensor model of the soft sensor modeling method in the industrial process by using the soft sensor sub-model. According to the method disclosed by the embodiments of the present invention, the problem that the conventional soft sensor modeling method in the industrial process leads to inaccurate modeling and difficult operation for large industrial noise data is solved, and the soft sensor modeling method in the industrial process disclosed by the embodiments of the present invention focuses on the training of poorly trained samples, so that while the prediction accuracy is improved, the interference caused by large noise data can be overcome.

The invention discloses a method and a device for active noise reduction for industrial noise treatment, aiming at providing the method and the device for the industrial noise treatment which is high in noise processing effect and low in the cost. The method for active noise reduction for industrial noise treatment comprises steps of (1) practical measurement and sampling modeling, (2) industrial personalized modulation, (3) field application simplification, and (4) informatization remote service. The device for active noise reduction for industrial noise treatment comprises a tubular sound insulation body, a secondary sound source protective housing installed inside the sound insulation main body along the axis of the sound insulation main body through a support, two secondary loudspeakers which are installed in the secondary sound source protective housing back to back through a fixed seat, a controller equipped with a personalized modulating subsonic sound code mode and mode switching programming as required in a claim of right, and two flow-guiding sound transmission protective housings which are installed on two ends of the secondary sound source protective housing; and the controller is arranged on the outside of the sound insulation main body and is electrically connected to the secondary loudspeaker.

The invention discloses a metal silencing hood for a pipeline of a petrochemical device, which relates to the field of industrial noise abatement, in particular to a metal silencing hood for abating noise of delivery pipelines in the petrochemical industry. The metal silencing hood mainly comprises a metal sound insulating board, a metal fiber felt, inorganic fibrous sound-absorbing cotton, a metal protective net and a damping layer, wherein the damping layer, the metal fiber felt and the inorganic fibrous sound-absorbing cotton are sequentially arranged on the inner wall of the metal sound insulating board, and the metal protective net is arranged outside the metal sound insulating board and mounted outside the pipeline of the petrochemical device together with the metal sound insulating board. The metal silencing hood has fireproof, flame-retardant and explosion-proof performances and quite high sound insulation, can be conveniently detached in daily maintenance and outage for maintenance in the petrochemical industry, and can be conveniently reinstalled.

A device and method for the continuous monitoring of otoacoustic emissions (OAE) levels on an individual worker uses as a pair of earpieces each featuring an external microphone, an internal microphone and a pair of miniature receivers. An adaptive filtering noise rejection processing of the measured distortion product OAE (DPOAE) is used to further improve the Signal-to-Noise ratio in frequencies where passive isolation remains insufficient. The adaptive filtering noise rejection technique relies on a Normalized Least-Mean-Square (NLMS) algorithm that uses the ipsilateral external microphone and the contralateral internal microphone to reject the noise from the measured DPOAE signals for each in-ear OAE probe. A DPOAE signal extraction algorithm provides for an increase in results reliability on a greater dynamic range in DPOAE magnitudes than known methods of DPOAE signal extraction. The device and method is suitable for the continuous monitoring of workers' hearing capabilities in industrial noises up to 75 dB(A).

The invention provides a full-range acoustic control module. The full-range acoustic control module is synthesized through sequentially packaging a panel layer with a two-dimensional acoustic atlas, afirst dustproof sound-transparent screen cloth layer, a first porous sound-absorbing cotton layer, a composite damping spacer layer, a second porous sound-absorbing cotton layer and a second dustproof sound-transparent screen cloth layer. The full-range acoustic control module has a sound field control advantage in all bands, particularly has good control ability performance at places with high sound pressure levels, is applicable to acoustical environments and spaces such as large-sized fields, airports, bullet trains, subway stations, theaters, conference centers, taping rooms, bars and industrial noise control and has good visual decoration and functional application.

The invention discloses novel material processing equipment. The novel material processing equipment comprises a worktable and an equipment body. A feeding inlet is formed in the upper end of the equipment body. A shaping discharging outlet is formed in the lower end of the equipment body. The equipment body is composed of a shaping layer, a conveying belt, a vibration plate and a heating layer, wherein the shaping layer is internally provided with a shaping rod and is provided with a baffle, the upper end and the lower end of the shaping layer are provided with a hot air outlet and a cold airinlet respectively, a dust cover is arranged above the worktable and the equipment body and comprises a cover part and a shaft sleeve part, the cover part is provided with a first-level flange and asecond-level flange, the first-level flange is located on the outer side of the second-level flange, corrugated parts are arranged at the upper and lower ends of the inner wall of the shaft sleeve part, and a silencing device is arranged on the cover part. The novel material processing equipment has the advantages of being simple in structure, convenient and practical, capable of effectively avoiding a heat energy accumulation phenomenon generated by traditional shaping processing equipment, good in shaping effect, good in dustproof effect, and capable of eliminating industrial noise.

The invention discloses a PWM wave duty ratio measuring method under an industrial noise condition; the method comprises the following steps: acquiring PWM signal voltage instant values, limiting theamplitude of the acquired voltage instant value according to a set amplitude limiting threshold, obtaining the duty ratio of a to-be-detected periodic signal according to the mean value of a pluralityof acquired voltage instant values and the amplitude limiting threshold upper limit. The method can remove noise interferences on the signal in certain level through amplitude limiting, and employs ahigh voltage acquisition frequency to ensure the signal chip to track continuous changes of the duty ratio. The method uses the single chip to acquire voltage signals, and processes the voltage signals so as to obtain the duty ratio, thus measuring the duty ratio without using a high frequency sampling signal; the method solves the mean value of the voltage values measured in many times, thus further reducing errors.

The invention relates to the technical field of noise reduction equipment, in particular to novel industrial noise reduction equipment which comprises a noise reduction device box body, heat dissipation devices, mechanical equipment, a damping device and a rubber carrying table, the two sides of the noise reduction device box body are symmetrically provided with the two heat dissipation devices, the damping device is arranged in the noise reduction device box body, and the rubber carrying table is arranged at the lower end of the damping device; the two sets of exhaust fans are consistent in wind direction, the two sets of exhaust fans operate at the same time, so that air in the closed box body flows in an accelerated mode, mechanical equipment is effectively cooled, first sound absorption cotton absorbs noise in the vent pipe, the noise is prevented from flowing out when the heat dissipation device conducts ventilation on the closed box body, and due to the arrangement of the heat dissipation device, the mechanical equipment is cooled, and meanwhile noise pollution is effectively avoided.

The invention discloses an industrial noise reduction protective shell convenient to disassemble and overhaul and a mounting method thereof. The industrial noise reduction protective shell comprises a base and a protective shell body, screw holes are formed in the base at equal intervals, the protective shell body is hinged to the top of the base through a hinge, and a first fixing frame is arranged at the position, located on one side of the protective shell body, of the top of the base; and a second fixing frame is arranged on the top of the base and located on the other side of the protective shell body. The protective shell has the advantages that by improving the problems occurring in the machining process of an existing industrial equipment protective shell, the noise pollution problem generated when a servo motor works is effectively solved, the problem that the protective shell body is inconvenient to disassemble in the installation process is optimized and redesigned, rapid installation and maintenance are achieved, the problem that the service life of the servo motor is influenced due to the fact that the servo motor is possibly overheated in the working process is solved, so that the working efficiency and the convenience of maintenance or overhaul are improved, and the protective shell is safe, practical and very convenient.

The invention discloses a carbon dioxide station air conditioner driven by industrial noise, belonging to the technical field of air conditioning. The air conditioner comprises an air conditioning host machine, an indoor heat exchanger and an outdoor heat exchanger. The air conditioning host machine comprises a columnar transduction cavity. The front end of the transduction cavity is sealed through a pressure resistance vibration film. The noise of the machine is received through a flared sound pressure amplifier. The rear end of the transduction cavity is communicated with a resonant cavity through a resonant tube. Liquid carbon dioxide is filled in the transduction cavity. A plurality of axial transduction plates arranged at intervals are arranged in the transduction cavity. A hot end heat exchanger is fixed at the front end of the transduction plates. A cold end heat exchanger is fixed at the rear end of the transduction plates. A circulation water path of the outdoor heat exchanger flows through the inner cavity of the hot end heat exchanger. A circulation water path of the indoor heat exchanger flows through the inner cavity of the cold end heat exchanger. According to the air conditioner disclosed by the invention, the air conditioner is simple in structure and high in reliability; the noise level of industrial factory buildings can be effectively reduced; air temperatures of stations can be adjusted according to requirements; and a comfortable working environment is created for operators.

The invention discloses an industrial noise treatment device. The device comprises a shell and a bottom plate, silencing holes are formed in the inner wall of the shell and the top surface of the bottom plate, the shell is divided into a front chamber and a silencing chamber, the silencing chamber is connected with an outlet pipe with an upward opening, a partition plate is arranged in the front chamber, a stepped hole is formed in the center of the partition plate, a movable filter cartridge is arranged in the stepped hole, a moving mechanism is arranged at the lower part in the front chamber, the moving mechanism comprises a bearing seat, a screw rod, a moving block and a driver, a fan is arranged in the silencing chamber, a jacking mechanism is arranged in the front chamber, a first sound insulation layer is arranged outside the shell, and a second sound insulation layer is arranged outside the outlet pipe. Compared with the prior art, the device has the beneficial effects that thedraught fan can work to suck air inwards, external air with noise can enter the silencing chamber conveniently to be silenced through the silencing holes, the filter cartridge is arranged on an inevitable path of air flowing to be used for intercepting dust, flocculent floating objects and the like so as to protect the silencing holes and ensure that the silencing holes can work normally, and meanwhile the filter cartridge is more convenient to clean.

The invention relates to the technical field of shot blasting derusting equipment, in particular to a pipeline shot blasting derusting machine. A noise reduction plate is arranged on the outer side ofa steel structure platform, a motor is arranged on the left side of the bottom of the steel structure platform, the output end of the motor is connected with a horizontal spiral conveyor, the upper end of the horizontal spiral conveyor is connected with a shot blasting chamber, the front end of the shot blasting chamber is provided with an inlet and outlet pipe sealing device, the right side of the bottom of the steel structure platform is provided with a settling box, and the left end of the settling box is connected with a bucket elevator; and one end of the bucket elevator is connected with the horizontal spiral conveyor, the other end of the bucket elevator is connected with a material storage box through a vacuum air pipe, the upper end of the material storage box is connected with ashot-slag separator, the shot-slag separator is arranged above the steel structure platform, and the bottom end of the material storage box is connected with a shot-leakage bucket. After the technical scheme is adopted, the pipeline shot blasting derusting machine has the beneficial effects that the machine can be installed without excavating of a foundation pit, field installation is facilitated, and industrial noise is greatly reduced.

The invention discloses a multi-frequency selection noise reduction device which comprises an inner-layer noise reduction unit which is arranged on one side close to a noise source and is sequentially provided with an inner-layer substrate, an outer-layer substrate, an outer-layer substrate, an outer-layer substrate, an outer-layer substrate and an inner-layer noise reduction unit from inside to outside, an inner coating layer adhered to the inner layer substrate; the inner sound-absorbing layer is made of a porous sound-absorbing material; and the inner sound insulation layer is of a panel structure. The vacuum noise reduction unit is provided with a vacuum outer framework, and the vacuum outer framework is supported on the panel of the inner sound insulation layer through a first vibration reduction connecting piece to form a closed vacuum layer; the vacuum noise reduction unit further comprises a heat conduction communicating piece, and the heat conduction communicating piece penetrates through the inner layer noise reduction unit and the closed vacuum layer. The device can effectively isolate complex industrial noise in different frequency bands of medium-high frequency and medium-low frequency, solves the problem of ventilation and heat dissipation of high-temperature equipment pipelines, and is simple in structure and good in universality.

The invention discloses a novel, energy-saving and environmental-friendly designing method for metallurgical machinery. The novel, energy-saving and environmental-friendly designing method comprises the following steps that first, raw materials are selected; next, three waste discharging is controlled; finally, mechanical damping is conducted, and a vibration isolation elastic support is used for a vibrative part; and additionally, sound absorption and vibration isolation treating methods are adopted at the time of machine designing, a muffler and an engine are used, and a high-precision distribution box and a gear reduction box are equipped. According to the novel, energy-saving and environmental-friendly designing method for the metallurgical machinery, the problems such as heat radiation, industrial noise, leaking and waste gas discharging can be solved, pollution to a factory building and air does not occur, the failure rate of mechanical equipment is reduced, and corrosion and abrasion of the mechanical equipment are further relieved greatly.