448 results about "Noise monitoring" patented technology

A noise monitoring device for indicating exposure to noise and providing a quickly perceived noise exposure warning. Noise levels are monitored, recorded and evaluated by the device utilizing a noise detector, an accumulator, and an evaluator that monitors an accumulated noise signal value and determines a probability that continued exposure to the noise will exceed an acceptable value and issues a noise exposure warning if that probability exceeds a predetermined value. The noise exposure warning comprises a quickly perceived indicator such as a readily perceived visual symbol or tactile warning.

The invention discloses an impact ground pressure split source comprehensive early-warning method of a coal mine which is capable of carrying out split source monitoring early warning by aiming at different load sources of induced impact ground pressure from different space ranges. The method comprises the steps of: installing a microquake monitoring system, a rock noise monitoring system and a mining-induced stress on-line monitoring system; respectively setting the warning threshold value of each monitoring system; collecting and analyzing the monitoring result data of each monitoring system; respectively calculating the weight value occupied by each monitoring system according to the relative importance degree of each monitoring system in the impact ground pressure early warning and the danger level corresponding to the monitoring result data of each monitoring system; comprehensively calculating the monitoring result data of each monitoring system and the weight value of the corresponding monitoring system to obtain the comprehensive early-warning result data; and judging whether the comprehensive early-warning result data exceeds the preset impact ground pressure damager level or not, if so, carrying out the warning, and if not, avoiding the warning. The method has the advantages that missing warning and error warning can be avoided, the operability is high, and in addition, labor and material sources can be saved.

The present invention provides digital subscriber line noise mitigation techniques, and applications thereof. In an embodiment, the present invention provides a toolbox of methods and techniques for mitigating the effects of noise in xDSL systems. These methods and techniques are controllable and locatable at one or both ends of a DSL communication link (e.g., within a central office transceiver unit or a remote transceiver unit). These novel methods and techniques include: (1) per tone noise margin modification, (2) data framer constraints modification, (3) improved noise measurements; (4) more robust on-line reconfiguration processes, (5) worst case noise monitoring, (6) induced bit rate limitations, and (7) distortion noise mitigation. These methods and techniques are particularly useful for mitigating the effects of time-varying noise and impulse noise.

The invention discloses an environment noise wireless real-time monitoring system based on a ZigBee technology, mainly comprising a noise monitoring control device and more than one terminal noise monitoring device, wherein the terminal noise monitoring device and the noise monitoring control device are connected by a wireless communication mode. The environment noise wireless real-time monitoring system based on the ZigBee technology can be used for monitoring municipal environment noise, and has broad application prospect; noise intensity analysis is carried out in a dispersed mode at each terminal noise monitoring device, the treatment pressure and system communication expense of the noise monitoring control device are reduced, and the system data treatment delay and transmission delayare reduced to realize real-time noise monitoring; and a ZigBee noise monitoring network has the characteristic of self organization, and the terminal noise monitoring devices are easy to join the network, thereby greatly facilitating the extension of system capacity.

An acoustic detector that includes active noise cancellation is presented. An acoustic detector converts sound waves, which include sound waves of interest as well as noise, to an electronic signal. An operator listens for a characteristic sound, for example the sound characteristic of fluid leaking from a pipe, as she varies the position of the transducer. At least one other acoustic detector is positioned in order to monitor noise. The electronic signal from the noise monitoring acoustic detector and the electronic signal from the acoustic detector are combined in a processor in order to cancel the noise. In some embodiments, the operator may adjust a cancellation band so that some frequencies are not cancelled. For example, the operator may adjust the cancellation band so that a co-worker's voice may be heard.

The invention discloses an environmental protection monitoring system of the Internet of Things. The environmental protection monitoring system of the Internet of Things includes a central monitor, a water environment monitoring terminal, an atmospheric monitoring terminal, a noise monitoring terminal, a solid waste collection and transportation monitoring terminal, a video monitoring terminal and the above monitoring The regional video monitoring and early warning system, the environmental quality management system, the pollution source management system, the public information publishing system, and the environmental protection comprehensive business office system are connected through the network; The transportation monitoring terminal and video monitoring terminal can fully grasp the water environment, air, and noise information, and supervise key pollution sources, which expands the monitoring area and reduces monitoring costs.

The invention discloses a magnesium alloy plate rolling parameter monitoring and fault diagnosing system and method. The system is composed of a work roll monitoring module, a main motor monitoring module, a vibration and noise monitoring module, a rolling pressure monitoring module, a rolling temperature monitoring module, a roll gap interval monitoring module, a piece rolling speed monitoring module, a work roll way revolving speed monitoring module, a data processing module and a rolling mill, technological parameters such as rolling force and the rolling temperature and equipment parameters such as the motor current are monitored at the same time, the operating state of equipment is provided according to the parameters, and temperature prediction and fault diagnosis are conducted. Operating data of the equipment are recorded, a temperature monitoring model and a fault diagnosis model are completed, and an intelligent monitoring and diagnosing system with self-learning capacity is set up. A basis is provided for the design of the magnesium alloy rolling equipment, and the magnesium alloy plate rolling parameter monitoring and fault diagnosing system and method has guiding significance for the design of rolling equipment. The magnesium alloy plate rolling parameter monitoring and fault diagnosing system and method is strong in industrial applicability and has very good application prospects.

The invention discloses an airplane noise monitoring, covering and optimizing method and an airplane noise monitoring, covering and optimizing device using a mobile sensor network, belonging to the field of civil aeronautical facility. The method comprises the steps of: using gathering nodes and mobile sensing and monitoring nodes in a monitoring area; collecting position information of mobile sensing and monitoring nodes with an original state by the gathering nodes; sending the position information back to a central processing computer; establishing a corresponding monitoring area model by the central processing computer according to an actual demand of the noise monitoring area, and simulating virtual movement of the mobile sensing nodes by using an optimal covering algorithm so as to complete layout optimization of optimized sensor nodes; after the central processing computer completes an optimization algorithm, transmitting the optimized position information to the corresponding gathering nodes; and sending an instruction through the gathering nodes, thus moving the mobile sensing nodes to the optimized positions according to the instruction, and completing the covering optimization of the monitoring area. The method and the device provided by the invention have the characteristics of strong self-adaption, resource conversation and rapid optimization speed.

The invention relates to a distributed urban environment noise real-time automatic monitoring system. The distributed urban environment noise real-time automatic monitoring system consists of a monitoring center and a plurality of monitoring nodes in a coordination mode. Each monitoring node is connected with the monitoring center through the Internet. Preprocessed noise data is transmitted to the monitoring center and is analyzed and displayed by the monitoring center. Node computers receive noise signals acquired by sound pressure transducers through sound cards. Node data management modules, LabVIEW node ends, NAS (Network Attached Storage) server management modules and node communication modules are all arranged in the corresponding node computers. The monitoring center is provided with a center computer. A noise data analysis module, a center data management module, a LabVIEW server, an urban noise GIS (Geographic Information System) display module and a center communication module are arranged in the center computer. According to the invention, the urban noise condition is displayed by a map unique visual effect, a visual, rapid and convenient noise monitoring interface can be provided, the cost is low, and the cost performance is high.

A hierarchical power supply noise monitoring device and system for very large scale integrated circuits. The noise-monitoring device is fabricated on-chip to measure the noise on the chip. The noise-monitoring system comprises a plurality of on-chip noise-monitoring devices distributed strategically across the chip. A noise-analysis algorithm analyzes the noise characteristics from the noise data collected from the noise-monitoring devices, and a hierarchical noise-monitoring system maps the noise of each core to the system on chip.

The invention discloses a monitoring system which comprises one or more area monitoring systems, a center server and a monitoring platform. The area monitoring systems are used for monitoring the real-time information in administrated areas in real time, the center server is used for achieving the information interaction between the area monitoring systems and the monitoring platform, and the monitoring platform is used for issuing the real-time information forwarded by the center server and obtaining a control command of a user to manage the area monitoring systems. Each area monitoring system comprises a satellite positioning tracing subsystem, a video monitoring subsystem, a dust monitoring subsystem, a noise monitoring subsystem and an intelligent roadblock subsystem. According to the monitoring system, continuous monitoring can be carried out on a construction site, influences on residents are effectively reduced, entering and exiting of vehicles are effectively managed, the vehicles are prevented from leaving a regulated path for running, and the safety of the construction site is ensured. The subsystems in each area monitoring system are integrally combined, the high re-expansibility is achieved, and the man-machine interaction is achieved through the fact that the area monitoring systems are managed by the monitoring platform.

The invention relates to the field of monitoring, and particularly relates to an automatic identification and monitoring system for indoor noise pollution. Firstly, the sample collection of a noise signal is conducted by an FPGA multi-channel microphone array. Secondly, the pre-treatment, the characteristic extraction and the characteristic selection of the noise signal are conducted by a digital signal processor (DSP), and a characteristic model is established for the noise signal at a cloud end. Thirdly, the noise monitoring information corresponding to a noise source is identified based on the technique matched with the noise signal characteristic mode. Finally, the noise identification information is graphically displayed on a main interface. According to the technical scheme of the invention, users can be effectively aware of noise pollution hazards. Meanwhile, users are reminded of getting away from noise hazards and actively taking prevention measures. Meanwhile, the living environment is improved. furthermore, the system plays a positive role in promoting the economic development.

The invention discloses a noise and electromagnetic radiation monitoring and shielding apparatus for an electrical control cabinet in a communication base station. The apparatus comprises a control cabinet and a housing. The housing is of a structure with three layers, which sequentially include a stainless steel plate, a foamed aluminium plate and a sharp wedged absorbing material plate. A temperature and humidity monitoring module is disposed on the internal surface of the housing. A noise monitoring module and an electromagnetic radiation monitoring module are disposed on the external surface of the housing. A temperature control module is placed inside the housing. The sharp wedged absorbing material plate is adopted for shielding radiation, and has a far better radiation absorption effect that a radiation shielding coating adopted by the prior art. The foamed aluminium plate is adopted for absorption, can further minimize radiation, and can eliminate noise generated by running of equipment as much as possible. The temperature and humidity in the control cabinet can be monitored and an adjusting module for temperature and humidity is adopted, so inconvenience of heat radiation is avoided because the housing is thick, the safety of equipment running is improved, and the service life of equipment is prolonged.

The invention discloses a dust online monitoring system, comprising a transport layer, a platform layer and an application layer, wherein the transport layer comprises a wired network, a wireless network and a 4G network; and a dust monitoring device, a noise monitoring device, a meteorological monitoring device and a video monitoring device are arranged in the application layer. Multiple environmental parameters such as the total suspended particulates, PM10, PM2.5, temperature, humidity, wind directions and wind speed are integrated according to the application layer, 24-hour online continuous monitoring is performed, and the characteristics of multi-parameter, real-time performance, intelligence and the like are achieved; data is transmitted through three major networks that are the wired network, the wireless network and the 4G network, and the real-time monitoring data can be rapidly updated; the monitoring data from different regions and different time periods is collected through the platform layer, a massive storage space is realized, the multi-dimensional and multi-spatial and temporal data statistical analysis can be performed, the administrative section can carry out thework in an orderly manner, and meanwhile, the system can accumulate data for establishing construction site environmental pollution control standards to further promote the long-term management of air pollution.

The invention discloses an intelligent livestock breeding controller, which comprises a main control module, a liquid crystal display module, a sensor module, an illumination control module, a music playing module, an alarm module, a key livestock individual detection module, an automatic air discharge device, an ultraviolet disinfection module, a wireless camera, a wireless communication module and a mobile phone terminal. The intelligent livestock breeding controller can realize intelligent control for livestock breeding, solves problems of feed contamination, waste, nonstandard feeding, poor environment quality and the like in artificial feeding, can realize functions of automatic feeding, ventilation, environment monitoring and the like, can also realize functions of decibel noise monitoring and alarming, key breeding object individual monitoring, illumination control, ultraviolet disinfection, music playing and the like, reduces the overall input cost and maintenance cost of the system, improves the livestock disease control and prevention efficiency, conforms to the trend of Internet of things technology development, is conducive to performing fine feeding on the livestock, and improves the breeding benefits.

The invention provides a method for improving accuracy of transformer substation boundary noise measurement. A measuring system adopted for the method comprises a noise spectrum measuring unit and an evaluation analysis system of a host. The method includes the following steps that the noise spectrum measuring unit is utilized to monitor noise spectrums of transformer substation noise sources such as transformers and current converters, monitoring data are transmitted to the evaluation analysis system of the host through a wireless network, and the characteristic spectrums of the transformer substation noise sources are evaluated and discriminated; spectrums of measuring points of a boundary, spectrums of measuring points of the noise sources and corresponding sound pressure levels are continuously monitored; when the sound pressure level change within the characteristic spectrum range of the noise sources is consistent with the sound pressure level change of the measuring points of the boundary within the characteristic spectrum range of the noise sources, noise values monitored at the measuring points of the boundary can accurately reflect the real situation of the noise the boundary of a transformer substation. Accuracy and scientificity of noise monitoring data of boundaries of enterprises can be improved, wherein in the enterprises, the characteristic spectrums of the noise sources are remarkable, and background noise is difficulty monitored by shutting down the noise sources.

The invention discloses a road environment comprehensive monitoring vehicle, and the comprehensive monitoring vehicle comprises a monitoring vehicle, a remote signal transmission module, an industrial control computer, and an in-vehicle display. The top of the monitoring vehicle is provided with a road environment monitoring module, and the road environment monitoring module comprises a main control circuit, a big garbage monitoring camera, a particle garbage monitoring sensor, a VOC monitoring sensor, a temperature and humidity monitoring sensor, and a noise monitoring sensor. The output end of each monitoring sensor is connected with the main control circuit. The output end of the big garbage monitoring camera is connected with the industrial control computer through a network line. The output end of the industrial control computer is connected with the in-vehicle display and the remote signal transmission module. A wireless signal transmitted by the remote signal transmission module is transmitted to a far remote monitoring system for receiving. According to the above design, the comprehensive monitoring vehicle can achieve the real-time online monitoring and analysis of road environment pollution conditions, provides road environment comprehensive information judgment criteria, outputs a road environment pollution level, solves a problem of road environment evaluation and detection difficulty to maximum degree, and improves the administrative law enforcement efficiency.