101 results about "Decibel" patented technology

The invention discloses a multi-information fusion hydraulic cylinder internal leakage fault diagnosis method, and relates to the technical field of hydraulic cylinder fault diagnos.The hydraulic cylinder internal leakage fault diagnosis method comprises the steps that firstly, a hydraulic cylinder heavy load, time-varying and nonlinear motion curve and a test system based on a multi-source sensor are constructed, and internal leakage fault evolution under the actual working condition is simulated; and secondly, developing a hybrid deep learning semi-supervised feature fusion framework based on a convolutional auto-encoder, a multi-head attention mechanism, residual connection and a bidirectional sequential network, and enhancing the characterization learning ability of a multi-source signal in a complex and multi-noise environment through omnibearing deep feature decoupling. And finally, feature extraction and fusion are realized by using the displacement error and the pressure signal, and fault diagnosis is completed. Experiments show that compared with a comparison model, the diagnosis accuracy of the provided model and feature fusion strategy is improved by 3.95%; under-3 decibel noise, the accuracy is improved by 2.33%, and the scheme has high accuracy, reliability and generalization performance.

The invention relates to the field of solid waste crushing equipment, and discloses a solid waste crushing equipment working state monitoring method and system, and the method comprises the steps: collecting a current signal, a vibration signal and a sound signal during the operation of solid waste crushing equipment; when the duration of the peak value of the current signal is smaller than a preset duration threshold value, the impact frequency characteristic of a first vibration frequency band exists in the frequency spectrum of the vibration signal, and the decibel peak value of the sound signal in the preset first frequency band is greater than a second preset threshold value, judging that the current signal is instantaneous load fluctuation; when the duration of the peak value of the current signal is greater than a preset duration threshold value and the vibration signal frequency spectrum presents continuous abnormal fluctuation with the period greater than a first preset duration, determining that a continuous overload fault occurs; if so, judging that the load fluctuates instantaneously; if yes, a feeding mechanism of the solid waste crushing equipment is controlled to reduce the feeding speed, and first prompt information is generated. According to the technical scheme, the monitoring accuracy is improved.

The present invention discloses an intelligent stop-barking method, device, and computer-readable storage medium. The method runs on an embedded terminal worn by a pet. The embedded terminal is built in with a preset pet barking model. The method includes: sound collection: obtaining a decibel value of ambient sound of the pet's surrounding environment; model comparison: if the decibel value of the sound is greater than a preset decibel value, then the sound collected is compared with the pet barking model and a comparison result is output; and output punishment: if the comparison result is greater than a preset punishment value, then the punishment module is triggered to stop the pet from barking. The technical solution, through machine learning models and signal processing techniques, enables high-accuracy dog barking sound recognition. It reduces reliance on powerful computing resources, and achieves stand-alone operation of data model, thereby improving feasibility and popularization.

The invention relates to the field of smart televisions, in particular to a volume configuration method and device, computer equipment and a storage medium, and the method comprises the steps: analyzing a standard audio file by using playing equipment of which the volume is to be configured, obtaining a standard audio analysis result, calculating to obtain a correction normal number, and analyzing real-time audio by using the playing equipment. And obtaining a real-time audio analysis result, performing matching in a preset configuration file according to the environmental noise value, and performing volume adjustment on the playing device with the volume to be configured. According to the volume configuration method, a standard audio analysis result is obtained through analysis of a playing device with the volume to be configured, a correction normal number is calculated in combination with a preset decibel, then an audio recorded by a recording device in real time is obtained and analyzed by the playing device, finally, a volume configuration scheme is matched in a preset configuration file according to the value, and the volume of the playing device is adjusted. Therefore, the audio file recorded by the recording equipment is analyzed to obtain real noise, and the volume of the playing equipment is automatically adjusted.

This application relates to a vacuum real-time leak detection system and method for tube bundles in direct air-cooled islands of thermal power plants. The system includes: a leak acoustic wave acquisition module installed at the connection points between the finned tubes of the air-cooled island radiator and the steam distribution pipe, and between the leaking finned tubes of the air-cooled island radiator and the condensate collection pipe, for acquiring acoustic wave signals from the tube bundles of the direct air-cooled island; a signal processing module for amplifying, filtering, and converting the leak acoustic wave signals; a judgment module for comparing the decibel value of the processed acoustic wave signal with a preset threshold; and a leak detection module for determining the leak area of ​​the leaking tube bundle based on the leak status and the address code of the leaking tube bundle. This solves the problems of related technologies, such as complex operation, long processing time, inability to monitor in real time, and difficulty in meeting the needs of continuous operation in thermal power plants.

The application relates to a blow molding product stack detection method, a system, a terminal and a storage medium, and belongs to the technical field of article stacking. The method comprises the following steps: acquiring the boxing weight of a current blow molding product as a current weight; determining the size relationship between the current weight and a weight threshold; if the current weight is greater than the weight threshold, acquiring foreign matter alarm prompt information; if the current weight is less than the weight threshold, acquiring a current decibel value when a box containing the blow molding product is moved; determining whether the current decibel value exceeds a preset decibel value; if yes, acquiring blow molding product loss prompt information; and if no, acquiring blow molding equipment abnormality prompt information. The application has the effect of better detecting the boxing quality of the blow molding product and reducing the possibility of unstable stacking of the box caused by the boxing problem as much as possible.

The invention relates to the technical field of electronic games, in particular to a Unity Audio Mixer-based game sound effect management method and related equipment, which respond to an externally input linear volume value, and determine a corresponding decibel value in combination with preset minimum and maximum volume thresholds; meanwhile, responding to an externally input sound effect name and a framing interval, checking whether a matching record exists in the interval list or not, if so, judging that an overlapping playing risk exists and stopping playing, and if not, judging that the overlapping playing risk exists and stopping playing if the matching record exists or the difference value is greater than the framing interval. If yes, updating the recording time and playing the corresponding sound effect according to the decibel value. The volume of a single sound effect can be accurately controlled, overlapped playing of the sound effects is avoided, and the game sound effect management effect and the user experience are improved.

The present application relates to the field of range hood equipment, and in particular to a range hood control method and range hood equipment, comprising: obtaining vibration data of a fan; fitting the vibration data into an amplitude-time curve; performing Fourier transform on the amplitude-time curve to obtain a first spectrum curve of the fan; obtaining vibration data of an interception module based on a preset working power; fitting the vibration data into an amplitude-time curve; performing Fourier transform on the vibration amplitude-time curve to obtain a second spectrum curve of the interception module; determining whether there is an overlapping area between the first spectrum curve and the second spectrum curve; if so, adjusting the preset working power to reduce the overlapping area. The present application reduces the overlapping area between the spectrum curve of the fan and the spectrum curve of the interception module by adjusting the working power of the interception module, thereby reducing the coherent influence of the noise of the fan and the noise of the interception module, and reducing the decibel value of the noise generated when the range hood is working.

The present application relates to a sound box volume intelligent adjustment method combining environmental noise monitoring and voice recognition, comprising the following: obtaining a first decibel value and a second decibel value of adjacent sampling intervals without human voice interference respectively; calculating the difference between the second decibel value and the first decibel value to obtain a decibel change value; judging the environmental noise change based on the decibel change value, if the environmental noise change is larger or smaller, triggering the voice recognition function, obtaining the feedback voice of the user and based on this to adaptively adjust the sound box volume. The present application uses the difference between the second decibel value and the first decibel value without human voice interference to approximately estimate the environmental noise change, when the environmental noise changes, the voice recognition function is triggered, the voice interaction with the user is carried out, and the sound box volume is adaptively adjusted, on the one hand, the volume can be adjusted in time when the noise fluctuates to adapt to the user's listening to the sound box content, on the other hand, the interaction with the user increases the user's experience.

The invention provides a microphone open circuit detection method, system and device and a medium, and the method comprises the steps: enabling an original audio to pass through a preset filter, and obtaining a target filtering audio; wherein the preset filter comprises a preset high-pass filter taking a first frequency as a cut-off frequency and a preset low-pass filter taking a second frequency as the cut-off frequency; determining a current decibel according to the target filtering audio; and determining a microphone open circuit state corresponding to the original audio according to the current decibel and a decibel threshold. Through the technical scheme of the application, the effect of detecting the open circuit state of the microphone without additionally adding hardware equipment is realized.

The invention provides a decibel calculation method for tire structure sound, and solves the problems that data acquisition is carried out in a specific environment or a limited speed range in most existing tire noise test methods, and a data analysis means is relatively single; the influence rule of the vibration characteristics of the tire in different frequency ranges on the in-vehicle noise cannot be fully captured, and the device can be widely applied to the field of tire testing. The method specifically comprises the following steps: uniformly reducing the speed of a tire from a high-speed rotating state to a low-speed rotating state, and collecting a vibration signal in the speed reduction process; preprocessing the vibration signal to obtain a frequency domain signal; obtaining frequency domain signal effective values of the frequency domain signals at low and medium frequencies on the X axis, the Y axis and the Z axis; and establishing a decibel calculation model according to the frequency domain signal effective value.

The application discloses a kind of rotating machinery early fault monitoring system and method based on high-frequency acoustic wave, belong to the field of fault detection, system includes high-frequency acoustic wave sensor, circuit system and host computer, high-frequency acoustic wave signal generated by rotating machinery early fault is obtained by high-frequency acoustic wave sensor, circuit system is made of multiple signal conditioning board and a piece of communication control board card, and host computer carries out data communication and instruction sending with circuit system by communication module.Utilize high-frequency acoustic wave signal decibel value to monitor fault, adopt high-frequency acoustic wave demodulation signal to identify fault, fuse multiple signal processing methods to obtain early fault sensitive optimization features, and diagnose by LSSVM parameter optimization method.The application has the advantages of high integration, low hardware requirement, channel number can be expanded, wide frequency detection range, saving data storage resources, etc., to realize preventive maintenance to rotating machinery early fault.

The utility model relates to the technical field of measurement, and discloses a sound toy decibel measuring and positioning device, which comprises a main body assembly, a decibel measuring box, a positioning assembly, a decibel measuring box, a sealing door hinged on one side of the decibel measuring box, a handle fixed on one side of the sealing door, and a positioning piece arranged in the decibel measuring box, and the positioning piece comprises a placing frame. The sound toy box has the beneficial effects that the sound toy can be positioned at the central position of the box, and the distances and angles of the six microphones relative to the sound production part of the toy can be kept relatively fixed and balanced, so that the difference of acoustic parameters such as sound intensity and frequency received by each microphone each time can be greatly reduced; the stability and the accuracy of a sound pressure level result obtained through final comprehensive analysis can be improved, and the real sound production condition of the toy can be reflected more accurately.

The invention relates to the field of cable voltage withstanding testing, in particular to a power cable voltage withstanding testing method, which comprises the following steps of: defining a scanning interval in combination with total capacitance of a cable and historical resonance data of the same type of cable in a three-stage resonance point searching mode of coarse scanning positioning of a candidate interval, fine scanning of refined data and secondary interpolation calibration; the problem of low efficiency of all-interval precise scanning is solved, and the defect of insufficient precision of empirical estimation can also be made up. According to the invention, the voltage compensation coefficient and the boost rate compensation value are respectively calculated based on the ground temperature and humidity environmental parameters of the test site, the dynamic correction of the test voltage and the boost rate is realized, and the influence of temperature and humidity on the cable insulation dielectric strength can be eliminated. According to the method, a mode of correlation analysis of discharge sound and current data is constructed in a boost stage, a defect area is positioned through a decibel attenuation trend, insulation abnormity is verified in combination with current fluctuation correlation, and a defect range is accurately narrowed to a single monitoring point interval or an adjacent monitoring point interval.

The invention discloses a self-adaptive pickup method for music rhythm, which comprises the following steps of: 1, acquiring a sound decibel value of a microphone in a period of time window based on an initial threshold value and an initial dynamic response range; 2, weighting and normalizing the sound decibel value collected in the time window, the initial threshold value and the initial dynamic response range, and updating the initial threshold value and the initial dynamic response range; step 3, acquiring a sound decibel value of the microphone in the next time window based on the updated threshold value and the dynamic response range, performing weighting and normalization processing on the sound decibel value collected in the time window and the threshold value and the dynamic range of the previous time window, and updating the threshold value and the dynamic range; and 4, circulating the step 3 until the music rhythm ends. The invention further provides a music light rhythm system, and the problems that the music rhythm effect is poor and the consistency is poor due to the difference of microphone devices, hardware circuits and structures are solved.

The invention provides a thermal power plant furnace tube leakage detection method and system, a storage medium and a program, and relates to the technical field of thermal power generation automatic control, and the method comprises the steps: S10, collecting a decibel signal of an operation unit furnace tube region in real time, and generating a decibel abnormal characteristic signal A; s20, acquiring a multi-source signal of an operation unit through a DCS system, calculating a weighted quotient value K according to the multi-source signal, and generating a flow and power anomaly characteristic signal B; s30, determining that the active power of the unit is greater than the minimum load threshold, and generating a load effective signal C; and S40, executing a first logic AND operation according to the flow and power anomaly characteristic signal B and the load effective signal C, and generating a working condition effective signal D. Compared with the prior art, the method has the following beneficial effects: firstly, the false alarm rate of boiler tube leakage is reduced to 8.3% from 38% of the traditional method; and 2, full-automatic operation is realized through a modular architecture, and the manual intervention rate is greatly reduced.

The invention provides a method for suppressing harmonic waves of an echo path. The method comprises the following steps: S1, acquiring an audio signal and processing the audio signal; s2, performing frequency domain conversion to extract amplitude, including reading near-end and far-end voices, and framing and windowing the voices; fourier transform is carried out on each frame, and voice amplitude information is extracted; s3, fundamental waves and harmonic waves are extracted and calibrated, specifically, peak detection is conducted on the near-end amplitude and the far-end amplitude, and an amplitude frequency band meeting the height is returned; determining a fundamental wave frequency band from the far-end frequency bands; determining a harmonic frequency band from the near-end frequency bands; converting the harmonic amplitude into a decibel value; storing the fundamental wave, the corresponding harmonic wave and the corresponding decibel value in a calibration file; s4, harmonic suppression processing; s5, reconstructing the audio signal, including Fourier inversion, and converting a frequency domain into a time domain; and storing each frame of data. According to the method, fundamental wave and harmonic wave frequency bands are determined by analyzing far-end and near-end voice amplitude information, so that calibration is carried out, and finally harmonic waves in an echo path are suppressed to achieve an echo cancellation effect.

The present application provides a method, device and medium for reducing the noise of game team voice based on a dynamic threshold mechanism. The method includes: dividing the audio signal into multiple time frames, converting the amplitude or decibel value of the time frame to obtain an energy value; comparing the energy value with the initial threshold, if the energy value is lower than the initial threshold, marking it as a noise frame or a low-priority frame, if the energy value is higher than the initial threshold, retaining it as a voice frame to be further processed; comparing the energy value with the dynamic threshold, if the energy value is lower than the dynamic threshold, filtering the corresponding time frame as a noise frame, if the energy value is higher than the dynamic threshold, retaining the corresponding time frame as a valid voice frame; encoding the time frame retained after filtering by the dynamic threshold to generate the final game team voice signal. The present application can reduce the phenomenon of missed or misjudgment of noise, realize dynamic and accurate filtering of noise under different environmental noise conditions, and improve user experience.

The invention relates to the technical field of anti-eavesdropping protection, and particularly discloses an intelligent anti-eavesdropping protection method based on quantum communication, and the method comprises the following steps: S1, obtaining the environment decibel and use decibel data of a user in real time in a set interval, and analyzing the tolerance range threshold and hearing sensitivity of the user; s2, caching the received signal when a user uses the equipment, monitoring the current environment decibel during playing, predicting the current use decibel of the user, and generating an initial interference sound wave in combination with a tolerance threshold; s3, adjusting an interference sound wave waveform according to the amplitude of the cache signal, and if an eavesdropping behavior is detected, synchronously outputting an adaptive interference sound wave while playing the cache signal to realize dynamic protection; according to the method, customized interference sound waves are dynamically generated by quantifying user hearing features and environment data, eavesdropping is effectively resisted, and communication safety is guaranteed.

This invention relates to a method, equipment, and medium for reducing noise during water pumping, and particularly to the field of water pumping noise reduction technology. For each pumping operation to be performed, the current air pressure data generated in the inlet hose when the water pump is operating at a preset power is collected. Based on the current air pressure data, the current decibel value of the sound generated by the inlet hose disturbing the water source when the water pump is operating at the preset power is determined. It is then determined whether the current decibel value meets a preset requirement. If the current decibel value does not meet the preset requirement, the current decibel value is adjusted and reduced to the air pressure change value required to meet the preset requirement. The inlet hose is pressurized according to the air pressure change value, and the disturbance of the inlet hose is reduced, so that the current decibel value meets the preset requirement. This prevents the inlet hose from disturbing or shaking in the water source area, avoiding noise generated by the inlet hose shaking in the water source area, thus achieving the noise reduction function.

The application discloses a voice environment detection method and a computer readable storage medium. The method comprises the following steps: receiving test audio; performing volume detection on the test audio to determine the maximum decibel value of the test audio; performing voice recognition on the test audio to obtain a voice recognition result, and performing voice recognition detection according to the voice recognition result and the content of the test audio; if a preset condition is met, determining that the voice environment detection is passed, wherein the preset condition comprises that the voice recognition detection is passed and the maximum decibel value of the test audio is within a preset volume range. The application can simplify the voice detection process, reduce the user threshold and problem troubleshooting cost.

The application discloses a sound recognition alarm method and system, electronic equipment and medium, and relates to the technical field of sound recognition. A plurality of preset time periods are set, corresponding sound collection sensitivities are configured for the plurality of preset time periods and sound types respectively, and are marked in a sound existing model. Sound information in the environment is collected in real time according to the sound existing model, wherein the sound information comprises audio information, the time of collecting the sound and the sound decibel, and the sound information is constructed in the sound existing model. The audio information is analyzed to obtain the sound type, and an alarm mode is implemented on the interference sound corresponding to the sound decibel that does not satisfy the preset condition. The sound type library is obtained by storing the interference sound feature set and the normal sound feature set, has a powerful database for subsequent environmental sound recognition, can help to quickly identify the square dance music in subsequent actual life, and can efficiently react and perform alarm processing.

The invention relates to the technical field of motor fault diagnosis and analysis, and provides a method and a device for detecting abnormal sound of a micro motor. The method comprises the following steps: acquiring sound signal digital data of the micro motor every set time; according to the sound signal digital data of the micro motor, extracting frequencies and decibel values corresponding to a set number of amplitudes, and obtaining a sound signal feature vector corresponding to the micro motor; and checking whether the multi-dimensional features in the acoustic signal feature vectors meet respective corresponding anomaly judgment conditions or not to obtain an anomaly detection result. The method can improve the recognition precision of complex abnormal sound features, can achieve the high-precision detection of the abnormal sound of the micro motor, and improves the precision of an abnormal detection result.

In some examples, a sensor node is mounted to a structure and includes a microphone that is coupled to the structure. The sensor node records, at a first time, first audio data, using the microphone, filters the first audio data to create first filtered audio, records, at a second time that occurs after the first time, second audio data using the microphone, filters the second audio data to create second filtered audio, and determines a difference in decibels between a first volume of the first filtered audio and a second volume of the second filtered audio. If the sensor node determines that the difference in decibels is greater than a predetermined threshold, then the sensor node sends a notification of intrusion activity that includes the difference in decibels.

The present invention discloses a method for automatic control of the transmitting power of a monitoring interference system based on multi-parameter weighting. First, the target signal of the monitoring unmanned aerial vehicle is acquired; the average signal amplitude, signal duty cycle, and signal bandwidth ratio are calculated respectively based on the target signal of the monitoring unmanned aerial vehicle, and the modulation type of the signal is discriminated; the average signal amplitude, signal duty cycle, signal bandwidth ratio, and signal modulation type are weighted respectively to obtain the corresponding weighted values; according to the weighted value of the average signal amplitude, the weighted value of the signal duty cycle, the weighted value of the signal bandwidth ratio, and the weighted value of the signal modulation type, a multi-parameter weighted value is obtained; the decibel value for controlling the transmitting power is calculated through the multi-parameter weighted value, and the obtained decibel value is converted into the control quantity of the gain control circuit of the interference system in the monitoring interference system to realize the automatic control of the transmitting power; the cost-effectiveness of the interference signal is significantly improved, the cost expenditure is reduced and the benefit is increased, and the pollution of the surrounding electromagnetic environment is effectively reduced.

The application discloses a kind of film layer crystallization state measurement method and related device, storage medium, the method includes: by pumping light to the material to be measured excitation ultrasound, again emit probe light to the same point position and carry out ultrasound detection, obtain current detection signal;If the signal-to-noise ratio of current detection signal is greater than decibel threshold value, from the acoustic impedance based on detection signal analysis abnormal crystallization region, indicate the degree of abnormal crystallization of the material to be measured;If the signal-to-noise ratio of current detection signal is not greater than decibel threshold value, based on current detection signal analysis the acoustic velocity and acoustic impedance of the material to be measured;The Young's modulus of the material to be measured is calculated using the acoustic velocity and acoustic impedance of the material to be measured, and is output as the quantitative index of the crystallization state of the material to be measured;If the acoustic velocity of the material to be measured cannot be analyzed, the amplitude of two echo signals is obtained based on current detection signal, and the attenuation parameter of echo is calculated using the ratio of the amplitude of two echo signals, and is output as the quantitative index of the crystallization state of the material to be measured.

1. Name of the design product: decibel column. 2. Use of the design product: for displaying environmental sound pressure decibel value. 3. Design points of the design product: in shape. 4. Picture or photo best indicating the design points: perspective view.

The invention discloses a centralized management and control software platform based on multi-source heterogeneous data fusion, and relates to the technical field of data management and control, first, real-time interconnection of video and audio collectors is ensured by using a heartbeat monitoring mechanism, and position coordinates of the collectors are determined through feedback information; then, a video-audio interconnection mapping network is constructed, and a foundation is laid for subsequent data processing; in a data review stage, accurately positioning abnormal videos and audio segments by analyzing a video frame pixel difference rate and an audio decibel value waveform curve; then, performing time alignment and matching on the abnormal segments to generate a high-value data set; and finally, surveying and mapping a collection area of the collector by means of a plane-coordinate system, and locking target position coordinates of the audio and video source in real time by combining information such as a sound source direction angle and the like, thereby assisting efficient acquisition of key information.

The application discloses an audio playing control method, comprising: acquiring first audio data; acquiring an environmental noise decibel value; performing sound source separation on the first audio data to obtain a plurality of second audio data with different frequency structures; adjusting the volume of the plurality of second audio data according to the environmental noise decibel value; performing audio mixing on the second audio data after volume adjustment; and adjusting the playing volume of the second audio data after audio mixing according to the environmental noise decibel value. The audio playing control method provided by the application can realize sound source separation of playing audio data, and adjust the volume of, for example, target sound source data and environmental sound source data according to the environmental noise condition, thereby improving the automatic adjustment capability of the system. The volume of sound of different sound sources is adjusted, so that sound containing substantial content such as a human voice sound source is highlighted in a noisy environment, and all kinds of sound sources are balanced in a quiet environment, giving people a sense of stability and improving the auditory experience.

An electronic device and an operation mode switching method thereof are provided. The electronic device includes a microphone group and a processor. The microphone group includes a plurality of microphones respectively configured at different positions for multi-directional sound collection. The processor receives a plurality of external sound signals through the microphone group, and obtains a plurality of target sound signals from the plurality of external sound signals. The processor defines decibel values of the plurality of target sound signals to analyze the decibel values of the plurality of target sound signals to obtain a current environment sound decibel value. The processor switches between a plurality of operating modes with different corresponding system performances according to the environment sound decibel value.