KR200463036Y1 - Environmental noise measurement system - Google Patents

Environmental noise measurement system Download PDF

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KR200463036Y1
KR200463036Y1 KR2020120004930U KR20120004930U KR200463036Y1 KR 200463036 Y1 KR200463036 Y1 KR 200463036Y1 KR 2020120004930 U KR2020120004930 U KR 2020120004930U KR 20120004930 U KR20120004930 U KR 20120004930U KR 200463036 Y1 KR200463036 Y1 KR 200463036Y1
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environmental noise
noise
port
environmental
control center
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KR2020120004930U
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Korean (ko)
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허찬영
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허찬영
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/10—Services
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/10—Services
    • G06Q50/26—Government or public services

Abstract

The present invention relates to an environmental noise management system that installs an automatic environmental noise measuring device in a distributed site and integrates it in a central environmental noise control center to manage environmental noise. Receive the measurement data from the environmental noise measurement system installed in the field, the environmental noise control center that receives the measurement data through the Internet from the environmental noise measurement system and integrates and manages the environmental noise of the whole area, and the environmental noise control center. It consists of a real-time sign board displaying real-time environmental noise measurement values of the area or each area in real time. Environmental noise management system according to the present invention is the environmental noise measurement system installed in each distributed management area automatically measure the environmental noise and report to the central environmental noise control center through the virtual private network (VPN) in real time environmental noise of each region The status can be monitored and measured values are displayed in real time on the billboards installed in each area to keep the residents interested in the environmental information.

Description

Environmental noise management system {ENVIRONMENTAL NOISE MEASUREMENT SYSTEM}

The present invention relates to an environmental noise management system, and more particularly, to an environmental noise management system that installs an automatic environmental noise measuring device in a distributed site and integrates it in a central environmental noise control center to manage environmental noise.

In general, noise is an undesired sound that is unpleasant to people, and can be said to be a sound that is irregular in physical terms or that exhibits aperiodic and high frequency characteristics. Although the sound of musical instruments may be noise to others who are not interested in listening to music, it sometimes depends on the subject of the listener, but noise generally refers to sounds that have a harmful effect on human health. Regulatory law refers to the strong sound produced by the use of machinery, apparatus, facilities or other objects.

Since environmental noise generated in daily living environment has a great influence on the pleasant living environment, administrative agencies manage environmental noise by measuring and analyzing road traffic noise, construction noise, and aircraft noise.

To express the level of environmental noise (sound pressure level), a unit called decibels is used. A standard sound is set and expressed in log scale. The reference sound pressure uses 2 x 10-5 Pascals in air and 0.1 Pascals in water. The use of Pascal in setting the reference sound pressure is because the communication distance varies greatly depending on the atmospheric pressure or moisture content when the sound is diffused and propagated in the air.

Patent No. 10-0958697 (published date 2010.05.18), which is a prior art document, discloses a technology related to an indoor environment measuring device for measuring various types of indoor environment values while minimizing space occupancy.

Conventional environmental noise management method for managing environmental noise is measured by a limited number of public officials directly at the measuring point of the noise control area with a portable noise measuring device, and then inputting data or installing an automatic noise measuring device in the noise control area. Collected data were collected and managed.

However, in the past, since noise is measured by manual labor of a public official in charge, it is difficult to measure noise in real time because it is distributed and managed by each institution, and there is insufficient systematization of noise management. There is a problem.

The present invention is proposed to solve the above problems, and the object of the present invention is to install an automatic environmental noise measuring device in a distributed site, and then integrate it in the central environmental noise control center to manage environmental noise. To provide a system.

In order to achieve the above object, the present invention integrates the environmental noise of the whole area by receiving the measurement data through the Internet from the environmental noise measurement system installed at each site of the noise regulation and the environmental noise measurement system. Environmental noise control center and the real-time display board to receive the measurement data from the environmental noise control center and to display the real-time environmental noise measurement value of the region or each region in real time.

The environmental noise measurement system includes a measurement microphone for converting noise into an electrical signal; A TCP / IP port connected to the environmental noise control center via the Internet; At least one serial port for connecting to devices having a serial interface; A USB port connected to a data backup device; A temperature control module controlling the operation of the fan or the heater according to the temperature sensed by the temperature sensor to operate at a predetermined range of temperature; Theft and shock detection module for detecting theft or shock from the detection signal of the door sensor or shock sensor; And measuring a noise level by receiving a noise signal from the measurement microphone and transmitting the noise signal to the environmental noise control center through the TCP / IP port, and detecting the temperature detected by the temperature control module and the theft and shock detection module. A signal is transmitted to the environmental noise control center through the TCP / IP port, communicates with devices connected through the serial port, and is configured as an environmental noise meter to back up data through the USB port.

The serial port comprises a serial 1 port connected to a GPS, a serial 2 port connected to a laptop for maintenance, and a serial 3 port connected to an uninterruptible power supply. An analog circuit unit for amplifying a noise signal input from the measuring microphone and converting the digital signal into digital measurement data, and a digital filter for calculating noise levels by filtering and calculating RMS values of the measured data input through the analog circuit unit. A signal processing unit, a communication unit providing a communication function through the TCP / IP port, the serial port, and the USB port, an input / output unit connecting the temperature control module and the theft and shock detection module, and an operating state and measured values A display unit for displaying and receiving a noise level from the digital signal processing unit, Receiving the sensing signal from the temperature control module, and theft and detection module includes a micro-control unit which displays the detected noise level and the value on the display unit, and transmits the noise level of the detection signal to the environmental noise monitoring center via the communication unit.

The digital signal processor calculates an RMS value of the digitally converted noise signal, and when the RMS value is out of a reference range, controls the gain of the amplifier of the analog circuit part according to a gain control algorithm, and inputs the measured value. After filtering the DC component with the DC notch filter, the auditory correction filter is performed with the frequency weighting filter, and the noise is calculated by time-weighting the digitally filtered measurement data.

And the frequency weighting filter is to select one of "A", "C", "Flat", the time weighting is set to one of "Fast", "Slow", "Impulse", the noise level is equivalent noise Exposure noise level, time rate noise level, maximum noise level, minimum noise level, it characterized in that the peak noise is calculated respectively.

Environmental noise management system according to the present invention is the environmental noise measurement system installed in each distributed management area automatically measure the environmental noise and report to the central environmental noise control center through the virtual private network (VPN) in real time environmental noise of each region The status can be monitored and measured values are displayed in real time on the billboards installed in each area to keep the residents interested in the environmental information. In addition, according to the present invention, by applying the frequency weighting filter and the time weighting filter, accurate noise can be measured, and the measured value can be systematically managed by the database.

1 is an overall configuration block diagram of an environmental noise management system according to the present invention,
2 is a flow chart schematically showing the overall operation of the environmental noise management system according to the present invention,
3 is a detailed configuration block diagram of the environmental noise measurement system shown in FIG. 1;
4 is a detailed configuration block diagram of the environmental noise meter shown in FIG. 3;
FIG. 5 is a flowchart illustrating an operating procedure of the environmental noise meter shown in FIG. 3;
6 is an example of a data transmission format transmitted between an environmental noise measurement system and an environmental noise control center installed at a site according to the present invention.

The technical problem achieved by the present invention and the implementation of the present invention will be more clearly understood by the preferred embodiments of the present invention described below. The following examples are merely illustrated to illustrate the present invention, but are not intended to limit the scope of the present invention.

Figure 1 is a block diagram of the overall configuration of the environmental noise management system according to the present invention, Figure 2 is a flow chart schematically showing the overall operation of the environmental noise management system according to the present invention.

Environmental noise management system according to the present invention, as shown in Figure 1, the environmental noise measurement system 100 is installed at each local site where noise regulation is required, and the Internet 202 from each environmental noise measurement system 100 An administrative agency that receives data for environmental noise management from the environmental noise control center 200 and the environmental noise control center 200 that integrates and manages environmental noise of the entire area by receiving noise measurement data or vibration measurement data through 210) and the real-time display board 220 receiving the measurement data from the environmental noise control center 200 and displaying the environmental noise measurement value of the region or each region in real time, and information on the environmental noise of the region desired by the inhabitants, etc. It consists of a personal computer 230 that allows searching.

Referring to FIG. 1, the environmental noise control center 200 is equipped with an environmental noise characteristic analysis management program for realizing environmental noise characteristic analysis, environmental noise evaluation, environmental noise management, and the like. Build and receive the measurement data from the environmental noise measurement system 100 installed in each site to comprehensively analyze and manage, and transmit the measurement data to the real-time electronic sign 220 of each region.

The operation of the environmental noise management system according to the present invention is shown in FIG. 2, the environmental noise measurement system 100, the environmental noise control center 200, and the electronic display board 220 connected to each other through the Internet 202. It consists of a signal transmission between the administrative agency 210, the personal computer 230.

Referring to FIG. 2, the environmental noise measurement system 100 and the environmental noise control center 200 distributed in each region have a server-client structure, and the environmental noise measurement system according to a control command of the environmental noise control center 200. 100 sets various operation options. Each environmental noise measurement system 100 measures environmental noise or vibration according to a set condition, and then periodically reports the measurement data to the environmental noise control center 200.

In addition, the environmental noise measurement system 100 detects the temperature through the temperature sensor and reports the temperature data to the environmental noise control center 200, and if theft or collision is detected, the environmental noise control center 200 Report).

The environmental noise control center 200 analyzes the measurement data reported from each environmental noise measurement system 100 by using a management program to manage and manage the database of environmental noise management data for the entire region, and to the electronic display panel 220 of each region. Display real-time measurements of the area or report the analyzed data to the administration 210. In addition, when residents and the like access to the environmental noise control center 200 using a personal computer 230 and request information on environmental noise, the public information is provided immediately, and the private data is allowed only through an authentication process. Provide the requested information.

FIG. 3 is a detailed block diagram of the environmental noise measurement system shown in FIG. 1, FIG. 4 is a detailed block diagram of the environmental noise meter shown in FIG. 3, and FIG. 5 is a block diagram of the environmental noise measurement system shown in FIG. 4. A flowchart illustrating the operating procedure.

Environmental noise measurement system 100 is installed in the field according to the present invention, as shown in Figure 3, measuring microphone 102, vibration sensor 104, environmental noise measuring instrument 110, communication connection terminal 120, the Internet TCP / IP port 121 connected to the virtual private network (VPN: 121a), Serial 1 port 122 connected to the GPS 122a, Serial 2 port connected to the laptop 123a for maintenance (123a) ), Serial 3 port 124 connected to the UPS (124S), USB port 125 connected to the data backup device (125a), input and output connection terminal 130, temperature control module 131, temperature The sensor 132, the fan 133, the heater 134, the theft and shock detection module 135, the door sensor 136, the shock detection sensor 137, and the expansion input / output unit 138 may be configured.

Referring to FIG. 3, the measurement microphone 102 is an outdoor microphone in which a bird prevention device is installed, and a windbreak network, a windbreak network installation stand, an electrostatic drive actuator, a preamplifier, a balance maintaining device, a humidity monitor, a calibration oscillator, a linear or A-weighting filter. , A microphone sensitivity adjuster, a cable driver, a DC-DC converter, and the like, convert environmental noise into an electrical signal and transmit the electrical noise to the environmental noise measurer 110. The vibration sensor 104 detects the vibration and transmits the vibration to the environmental noise measurer 110.

As shown in FIG. 4, the environmental noise measurer 110 includes a keypad 111, a microcontrol unit (MCU) 112, an LCD 113, an analog circuit unit 114, a digital signal processing unit (DSP: 115), The communication unit 116 and the input / output unit 117 are configured to set an operation option by inputting the keypad 111 and display the operation state on the LCD 113.

The analog circuit unit 114 includes an amplifier having an AGC function, an A / D converter, and the like, amplifies the microphone signal (noise signal) input from the measurement microphone 102 and the vibration signal input from the vibration sensor 104, and then digitally. The digital signal processor 115 transmits the measured data to the microcontrol unit 112 by filtering and calculating RMS values. The microcontrol unit 112 displays the value measured by the measurement data input from the digital signal processor 115 on the LCD 113 and transmits the measured value to the environmental noise control center 200 through the communication unit 116. At this time, the microcontrol unit 112 operates by an application program installed in the Linux OS.

The communication unit 116 is connected to the communication connection terminal 120, the TCP / IP port 121 connected to the Internet-based virtual private network 121a, the serial 1 port 122 connected to the GPS 122a, maintenance Serial 2 port 123 connected to the notebook 123a, a serial 3 port 124 connected to the uninterruptible power supply (UPS) 124a, and a USB port 125 connected to the data backup device 125a. . That is, the communication unit 116 communicates with the environmental noise control center 200 through the TCP / IP port 121 through the Internet-based virtual private network (VPN), and transmits GPS received data to the environmental noise through the serial 1 port 122. It is delivered to the microcontrol unit 112 of the meter, and provides a communication function for maintenance with the notebook 123a through the serial 2 port 123. In addition, the operation state data is received from the uninterruptible power supply 124a through the serial 3 port 124 and transferred to the microcontrol unit 112 of the environmental noise measuring instrument 110, and the measurement data is backed up through the USB port 125. It stores in the storage 125a.

The input / output unit 117 is connected to the input / output connection terminal 130 to connect the microcontrol unit 112 of the environmental noise measuring instrument with the temperature control module 131, theft and output detection module 135, and the expansion input / output unit 138. Let's do it. The temperature control module 131 controls the operation of the fan 133 and the heater 134 according to the temperature sensed by the temperature sensor 132, for example, when the temperature exceeds a predetermined temperature, the fan 133 is operated for cooling. When the temperature is below a predetermined temperature, the heater 134 is operated to maintain a constant range of operating temperatures at all times. In addition, the anti-theft and shock detection module 135 detects the door open from the door sensor 136 installed in the door or the shock is detected from the shock sensor 137 and transmits it to the microcontrol unit 112 of the environmental noise meter, The microcontrol unit 112 reports the environmental noise control center 200 through the communication unit 116 as well as alarm or take action. The expansion input / output unit 138 provides an expansion input port and an expansion output port to connect other sensor inputs or control outputs.

Environmental noise measurement system according to the present invention operates as shown in FIG.

Referring to FIG. 5, the measurement microphone 102 receives a noise of an installed area, converts the noise into an electrical noise signal, and transmits the signal to an amplifier of the environmental noise measurer 110, and an amplifier of the environmental noise measurer 110. Amplifies to a level controlled according to an automatic gain control (AGC) algorithm (S501 to S503). The analog noise signal amplified by the amplifier is converted into digital and then input to the digital signal processor 115. At this time, the RMS value of the digitally converted noise signal is calculated, and when the RMS value is compared with a predetermined reference value and is out of range, the gain of the amplifier can be measured by controlling the gain of the amplifier according to a gain control algorithm. The gain of the amplifier is adjusted to fall within the range (S504, S505).

The measured data converted to digital and input to the digital signal processor 115 are filtered by a DC weight filter, and then subjected to auditory correction by a frequency weighting filter implemented as a digital filter (S506 and S509). The frequency weighting is to select one of "A", "C" and "Flat". The "A" weighting is selected to adjust the level of noise to the actual human feeling, and the "Flat" means that the frequency response is linear. It is then selected for sound level measurement and frequency analysis, and the "C" weighting is used to measure sound pressure levels at low or high frequency situations where no measurement is desired. At this time, a part of the DC notched filtered output is processed in the digital filter bank to perform an octave band analysis (S507 and S508). Typically, when frequency analysis is performed to determine individual noise levels for a particular frequency, octave band analysis or narrow-band analysis is performed.

The digitally filtered measurement data is again calculated as an RMS value and accumulated in the storage, and a measurement value having dynamic characteristics applied to time weighting is calculated as a noise level (SPL), and various noise levels are calculated along with the accumulated result (S510 to S514). In other words, if some average is not applied while measuring the noise level, it is difficult to measure because it is shaken severely. Therefore, it uses exponential average using RMS circuit, which is called time weighting and has the setting of "Fast", "Slow", "Impulse", etc. . Also, the noise level includes equivalent noise level, exposure noise level, time rate noise level, maximum noise level, minimum noise level, and peak noise level.

On the other hand, when the noise level (SPL) value of the measurement data is determined to be an abnormal noise outside the reference value, the noise is recorded by coding the MP3 method (S515, S516). The calculated noise level (SPL) value is displayed on the LCD 113 of the measuring instrument, and when the reporting period is reached, the measured data and the MP3 recorded data are transmitted to the environmental noise control center 200 (S517 to S519).

At this time, the data transmission format transmitted between the environmental noise measurement system and the environmental noise control center is STX (1), A (1), measuring instrument code (7), command (4), variable length of Data, date and time 14, EXT (1), CHK (2), and CR (1). The variable length data is composed of L (variable), P1 (1), L1 (1), V1 (variable), P2 (1), L2 (1), V2 (variable),... Here, the command of the P (parameter), L (length), V (value) type can be defined according to the P value, the frequency weighting, time dynamic characteristics, equivalent noise calculation cycle, reading the set value, input the microphone calibration value.

Although the present invention has been described with reference to one embodiment shown in the drawings, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom.

100: environmental noise measurement system 102: measurement microphone
104: vibration sensor 110: environmental noise measuring instrument
111: keypad 112: microcontrol unit
113: LCD 114: analog circuit portion
115: digital signal processing unit 116: communication unit
117: input and output unit 120: communication connection terminal
130: input and output connection terminal 131: temperature control module
132: temperature sensor 133: fan
134: heater 135: theft and shock detection module
136: door sensor 137: shock detection sensor
138: expansion and output unit 200: environmental noise control center
210: administrative agency 220: display board
230: personal computer

Claims (2)

delete Environmental noise measurement system installed in each local site where noise regulation is required,
Environmental noise control center that receives the measurement data from the environmental noise measurement system via the Internet and integrates and manages the environmental noise of the whole area;
In the environmental noise management system consisting of a real-time display board for receiving the measurement data from the environmental noise control center and displays the environmental noise measurement value of the region or each region in real time,
The environmental noise measurement system,
A measurement microphone for converting noise into an electrical signal;
A TCP / IP port connected to the environmental noise control center via the Internet;
At least one serial port for connecting to devices having a serial interface;
A USB port connected to a data backup device;
A temperature control module controlling the operation of the fan or the heater according to the temperature sensed by the temperature sensor to operate at a predetermined range of temperature;
Theft and shock detection module for detecting theft or shock from the detection signal of the door sensor or shock sensor; And
The noise signal is input from the measuring microphone to measure the noise level, and is transmitted to the environmental noise control center through the TCP / IP port, and the temperature detected by the temperature control module and the signal detected by the theft and shock detection module. Transmits to the environmental noise control center through the TCP / IP port, and communicates with the devices connected through the serial port, environmental noise meter for backing up data through the USB port,
The serial port is composed of a serial 1 port connected to the GPS and a serial 2 port connected to the notebook for maintenance and a serial 3 port connected to the uninterruptible power supply,
The environmental noise measuring unit includes an analog circuit unit for converting amplified noise signal input from the measuring microphone into digital measurement data, including an amplifier having an AGC function and an A / D converter;
A digital signal processing unit for calculating a noise level by filtering and calculating RMS values of the measured data input through the analog circuit unit;
A communication unit providing a communication function through the TCP / IP port, the serial port, and the USB port;
An input / output unit connecting the temperature control module to the theft and shock detection module;
A display unit for displaying the operation state and the measured value,
The noise level is input from the digital signal processing unit, the sensing signal is input from the temperature control module and theft and detection module through the input / output unit, and the noise level and the detection value are displayed on the display unit, and the noise level is transmitted to the environmental noise control center through the communication unit. And a microcontrol unit for transmitting a detection signal,
The digital signal processing unit,
The RMS value of the digitally converted noise signal is calculated, and when the RMS value is out of a reference range, the gain of the amplifier of the analog circuit part is controlled according to a gain control algorithm.
Filtering the DC component by using the DC notch filter and then performing auditory correction filtering by using a frequency weighting filter,
Time weighting the digital filtered measurement data to calculate a noise level,
The frequency weighting filter is “A” which the noise level is selected to match the actual human feeling, “Flat” which is selected for the noise level measurement and frequency analysis because the frequency response is linear, and low frequency or high frequency that do not want to measure. Choose one of the "Cs" you choose to measure sound pressure levels in your situation,
The time weighting is set to one of "Fast", "Slow", "Impulse",
The noise level is calculated as equivalent noise level, exposure noise level, time rate noise level, maximum noise level, minimum noise level, peak noise level, respectively.
The environmental noise control center is equipped with environmental noise characterization management program for realizing environmental noise characterization, environmental noise evaluation, environmental noise management,
Establishes an Internet-based Virtual Private Network (VPN) to receive measurement data from environmental noise measurement systems installed at each site for comprehensive analysis and management.
The measuring microphone is an outdoor microphone equipped with a bird-prevention device, a windbreak network, a windshield installation stand, an electrostatic drive actuator, a preamplifier, a balance maintaining device, a humidity monitor, a calibration oscillator, a linear or A-weighting filter, a microphone sensitivity adjuster, a cable driver, Equipped with a DC-DC converter converts the environmental noise into an electrical signal and transfers it to the environmental noise meter,
The communication unit communicates with the environmental noise control center through an internet-based virtual private network (VPN) through a TCP / IP port, transfers GPS reception data to the microcontrol unit through a serial 1 port, and a laptop through a serial 2 port. It provides communication function for maintenance and maintenance, receives operation status data from the uninterruptible power supply through the serial 3 port, transfers it to the microcontrol unit, and stores the measured data in backup storage through the USB port. Environmental noise management system.
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Cited By (9)

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KR101261315B1 (en) 2012-12-03 2013-05-06 한국항공우주연구원 Data transmission device used for reference station of gnss
KR20150082923A (en) * 2014-01-08 2015-07-16 대우조선해양 주식회사 Monitoring system of work environment using sound quality camera and position information system of crew and method thereof, and ship or ocean construction including the same
KR20150130176A (en) * 2014-05-13 2015-11-23 (주)몽태랑인터내셔날 Cloud-based noise measurement system and method thereof
KR101609914B1 (en) 2014-02-19 2016-04-07 이동원 the emergency situation sensing device responding to physical and mental shock and the emergency situation sensing method using the same
WO2016182183A1 (en) * 2015-05-08 2016-11-17 한국디지탈콘트롤 주식회사 Aircraft noise analysis method based on natural cutoff frequency
CN109738017A (en) * 2019-01-24 2019-05-10 安徽斯瑞菱智能科技有限公司 A kind of industrial environment detection method and system
KR102364653B1 (en) * 2021-06-24 2022-02-23 한국환경설계(주) the improved method for analyzing aircraft noise
KR102368440B1 (en) 2021-07-26 2022-02-28 주식회사 아큐리스 Web-based intelligent integrated noise and vibration monitoring, storage and management black box system using Internet of Things (IoT) noise and vibration sensors
KR102389500B1 (en) * 2021-06-24 2022-04-25 한국환경설계(주) the improved method for measuring aircraft noise

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Cited By (14)

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KR101261315B1 (en) 2012-12-03 2013-05-06 한국항공우주연구원 Data transmission device used for reference station of gnss
KR20150082923A (en) * 2014-01-08 2015-07-16 대우조선해양 주식회사 Monitoring system of work environment using sound quality camera and position information system of crew and method thereof, and ship or ocean construction including the same
KR102210786B1 (en) * 2014-01-08 2021-02-02 대우조선해양 주식회사 Monitoring system of work environment using sound quality camera and position information system of crew and method thereof
US9640056B2 (en) 2014-02-19 2017-05-02 Dongwon YI Method for sensing emergency in response to physical and mental shock and apparatus for sensing emergency using the method
KR101609914B1 (en) 2014-02-19 2016-04-07 이동원 the emergency situation sensing device responding to physical and mental shock and the emergency situation sensing method using the same
KR101580253B1 (en) 2014-05-13 2016-01-04 (주)몽태랑인터내셔날 Cloud-based noise measurement system and method thereof
KR20150130176A (en) * 2014-05-13 2015-11-23 (주)몽태랑인터내셔날 Cloud-based noise measurement system and method thereof
WO2016182183A1 (en) * 2015-05-08 2016-11-17 한국디지탈콘트롤 주식회사 Aircraft noise analysis method based on natural cutoff frequency
CN109738017A (en) * 2019-01-24 2019-05-10 安徽斯瑞菱智能科技有限公司 A kind of industrial environment detection method and system
CN109738017B (en) * 2019-01-24 2023-10-27 安徽斯瑞菱智能科技有限公司 Industrial field environment detection method and system
KR102364653B1 (en) * 2021-06-24 2022-02-23 한국환경설계(주) the improved method for analyzing aircraft noise
KR102389500B1 (en) * 2021-06-24 2022-04-25 한국환경설계(주) the improved method for measuring aircraft noise
KR102368440B1 (en) 2021-07-26 2022-02-28 주식회사 아큐리스 Web-based intelligent integrated noise and vibration monitoring, storage and management black box system using Internet of Things (IoT) noise and vibration sensors
KR20230016556A (en) 2021-07-26 2023-02-02 주식회사 아큐리스 Web-based intelligent integrated noise and vibration monitoring, storage and management black box system using Internet of Things (IoT) noise and vibration sensors

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