KR101293472B1 - Apparatus and method for analysing sound and vibration - Google Patents

Abstract

An apparatus and method for analyzing noise vibrations is disclosed. The present invention analyzes and stores the measured noise data by simultaneously measuring environmental vibration noise and blast vibration noise. According to the present invention, it is possible to simultaneously measure the environmental vibration noise and the blast vibration noise in one device.

Description

Apparatus and method for analysing sound and vibration

The present invention relates to an apparatus and method for analyzing noise vibrations, and more particularly, to an apparatus and method for analyzing and storing noise data measured by simultaneously measuring environmental vibration noise and blasting vibration noise.

The management criteria for vibration and noise generated at construction sites have recently shifted from structural impact assessment to environmental impact assessment. However, the conventional blast vibration noise measuring device can be used only for the structural impact evaluation and there is a problem that cannot be used for the environmental impact evaluation. In addition, the conventional environmental vibration noise measuring device can be used only for the environmental impact evaluation and there is a problem that cannot be used for the structure impact evaluation. Accordingly, there is a problem in that a separate noise measuring device must be used when evaluating the structural impact or the environmental impact.

KR 10-2009-0065694 (Jung Yong-ho, Korea Institute of Construction Technology) 2009. 06. 23. Patent Document 1 is a wireless measurement method and apparatus for monitoring a structure, and Patent Document 1 integrates various sensors in one device. In addition to performing independent and independent multi-sensor functions, there are disclosed contents which bring about qualitative improvement of measurement data by using correlation or correction relation between multiple measurement items obtained from one sensor device. KR 10-1052468 (Inyoung Construction Co., Ltd., Yang Kyeong-Taek, Korea National Housing Corporation) 2011. 07. 22. Patent document 2 is a control device and method for dismantling concrete structure by real-time environmental factor monitoring. Patent document 2 dismantles concrete structure. Disclosed is a method of controlling the operation of the dry dismantling equipment by detecting vibration, noise or dust generated from the dry dismantling equipment and comparing it with an environmental reference value.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a noise vibration analyzing apparatus and method capable of simultaneously analyzing and storing measured noise data by simultaneously measuring environmental vibration noise and blasting vibration noise.

According to an aspect of the present invention, there is provided a noise vibration analyzing apparatus comprising: a sensor unit including a microphone that collects an acoustic signal and outputs an analog electrical signal and an acceleration sensor that collects vibration data and outputs an analog electrical signal; Converts the analog electrical signal input from the microphone and the analog electrical signal input from the acceleration sensor into digital signals to obtain environmental vibration noise data and blast vibration noise data, and obtains the environmental vibration noise data and the blast vibration noise data A data acquisition unit for outputting a; When the measurement command is applied, the control command for instructing to output the environmental vibration noise data and the blast vibration noise data obtained from the acoustic signal collected by the microphone provided in the sensor unit and the vibration data collected by the acceleration sensor; An application processor configured to output to a data acquirer, store a digital signal output from the data acquirer, and display a digital signal output from the data acquirer; A storage unit for storing a digital signal output from the data acquisition unit under control of the application processor; And an output unit for visually or audibly displaying the digital signal output from the data acquisition unit under the control of the application processor.

According to an aspect of the present invention, there is provided a noise vibration analysis method comprising: receiving an analog electrical signal from a microphone for collecting an acoustic signal, and receiving an analog electrical signal from an acceleration sensor for collecting vibration data; Converting the analog electric signal input from the microphone and the analog electric signal input from the acceleration sensor into a digital signal to obtain environmental vibration noise data and blast vibration noise data; Storing the environmental vibration noise data and the blast vibration noise data; And visually or audibly displaying the environmental vibration noise data and the blast vibration noise data.

According to the noise vibration analysis device and method according to the present invention, it is possible to measure the environmental vibration noise and blasting vibration noise at the same time in one device. In addition, analysis and storage of the measured environmental vibration noise data and the blast vibration noise data may be performed in one device.

1 is a block diagram illustrating a noise vibration analysis apparatus according to a preferred embodiment of the present invention;
2 is a block diagram for explaining in detail the configuration of the data acquisition unit shown in FIG.
3 is a flowchart illustrating a method for analyzing noise and vibration in accordance with a preferred embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the noise vibration analysis apparatus and method according to the present invention.

1 is a block diagram illustrating a sound vibration analysis apparatus according to a preferred embodiment of the present invention.

1, the noise vibration analysis apparatus 100 according to a preferred embodiment of the present invention analyzes and stores the noise vibration data measured by simultaneously measuring the environmental vibration noise and blasting vibration noise. To this end, the noise vibration analysis apparatus 100 includes a sensor unit 110, a storage unit 120, an application processor (AP) 130, a complex programmable logic device (CPLD) 140, and a data acquisition unit ( Data Acquisition Unit (DAQ) 150, a power supply unit 160, an output unit 170, a serial interface unit 180 and an input unit 190 are provided.

The sensor unit 110 includes a microphone 111 and an accelerometer 113, and collects sound signals and vibration data at a point where the sound vibration analyzing apparatus 100 is located or disposed. That is, the microphone 111 outputs an analog electric signal by collecting an acoustic signal at a point where the noise vibration analysis apparatus 100 is located or disposed. In addition, the acceleration sensor 113 detects acceleration, tilt, shock, and the like in three axes of the X, Y, and Z axes, and collects vibration data at a point where the noise vibration analysis apparatus 100 is located or disposed, thereby analog electric. Output the signal.

The storage unit 120 may include a NAND flash memory in which a program for driving and controlling the application processor 130 is stored, and a DRAM for storing data processed by the application processor 130. : External memory interface device equipped with DRAM) and SD card (Secure Digital Card) or MMC (Multimedia Card).

The application processor 130 supplies power to each sensor constituting the sensor unit 110 according to whether the installed program is set. When the measurement command is applied from the input unit 190, the application processor 130 converts the sound signal or vibration data collected by the sensor provided in the sensor unit 110 into a digital signal and outputs the digital signal. Outputs the control command indicated. Next, the application processor 130 stores the sound signal or vibration data input from the data acquirer 150 in the storage 120. In addition, the application processor 130 selectively outputs the analysis result of the acoustic signal or the vibration data to the external memory interface device provided in the storage unit 120. In this case, the application processor 130 analyzes an intensity signal, a frequency analysis, a frequency analysis-based octave analysis, a digital filter-based octave analysis, and a sound quality analysis on the sound signal or vibration data. Since such analytical methods are well known to those of ordinary skill in the art, detailed descriptions thereof will be omitted.

The CPLD 140 is a programmable signal processing device that relays a signal acquisition process and adjustment of the sensor unit 110 while exchanging a signal with the application processor 130. A separate DA converter (not shown) and an amplifier (not shown) are sequentially connected to the CPLD 140, and a signal input through the CPLD 140 is processed by the CPLD 140, and then an external signal analysis device (not shown) or data recording is performed. Signals may be output to devices (not shown).

FIG. 2 is a block diagram illustrating in more detail the configuration of the data acquisition unit illustrated in FIG. 1.

The data acquisition unit 150 converts an analog electric signal input from the sensor unit 110 into a digital signal and outputs the digital signal. That is, the data acquisition unit 150 converts the analog electrical signal input from the microphone 111 and the acceleration sensor 118 into a digital signal to obtain environmental vibration noise data and blast vibration noise data. To this end, the data acquisition unit 150 includes an environmental vibration noise data acquisition unit 151 and a blast vibration noise data acquisition unit 153.

The environmental vibration noise data acquisition unit 151 converts discrete signals input from the microphone 111 and the acceleration sensor 118 into digital signals to obtain environmental vibration noise data. At this time, the environmental vibration noise data acquisition unit 151 applies a high pass filter (HPF) to discrete signals on three channels of the X-axis, the Y-axis, and the Z-axis, and thus cuts off a preset cut off frequency. ) Is obtained, and environmental vibration noise data is obtained using the obtained value. Here, when the cut-off frequency is experimentally determined, 1 Hz is used in the present invention.

That is, the environmental vibration noise data acquisition unit 151 calculates an RMS value from discrete signals passing through a high pass filter (HPF) according to a calculation method specified in the Korean standard (KS B ISO 8041: 2009). . Here, the Korean standard KS B ISO 8041: 2009 specifies the standards, performance specifications and tolerances for equipment designed to measure the value of vibrations made for the purpose of assessing the human response to vibrations. have.

Then, the environmental vibration noise data acquisition unit 151 calculates the Lv value by converting the unit of the calculated RMS value to dB. The environmental vibration noise data acquisition unit 151 calculates the maximum value, the minimum value, and the average value of the Lv value to obtain an Ln value (percentile value) for the Lv value. At this time, the environmental vibration noise data acquisition unit 151 may convert the unit of the Ln value. Next, the environmental vibration noise data acquisition unit 151 stores the values obtained through the discrete signals input from the sensor unit 110 according to a control command of the application processor 130, or the storage unit 120 or the output unit. Output to (170).

The blasting vibration noise data obtaining unit 153 converts discrete signals input from the microphone 111 and the acceleration sensor 113 into digital signals to obtain blasting vibration noise data. In this case, the blasting vibration noise data acquisition unit 153 obtains a value of a predetermined specific band by applying a band pass filter (BPF) to discrete signals in three channels of the X-axis, the Y-axis, and the Z-axis. In addition, the blasting vibration noise data is obtained using the obtained values. Here, the band of the band pass filter (BPF) is obtained experimentally, in the present invention uses 1Hz ~ 100Hz.

That is, the blast vibration noise data acquisition unit 153 converts the acceleration value passing through the band pass filter BPF into a speed value. The blasting vibration noise data acquisition unit 153 obtains only the speed value of a specific band by applying a band pass filter (BPF) to the converted speed value. At this time, the band of the band pass filter (BPF) is obtained experimentally, in the present invention uses 1Hz ~ 100Hz. Then, the blasting vibration noise data acquisition unit 153 calculates the maximum speed value, the maximum acceleration value, the maximum movement value, and the peak vectory sum (PVS) value from the speed value passing through the band pass filter BPF. The blasting vibration noise data acquisition unit 153 calculates a zero crossing value with respect to the speed value. Next, the blasting vibration noise data obtaining unit 153 stores the values obtained through the discrete signals input from the sensor unit 110 according to the control command of the application processor 130. Output to (170).

The power supply unit 160 includes a DC input terminal and a battery input terminal, and additionally, a power management integrated circuit (PMIC) and a battery charging unit for efficient control and management of power input from the DC input terminal. Equipped. The power supply unit 160 supplies the operating power of the noise vibration analysis apparatus 100 according to the present invention.

The output unit 170 includes a display for visually displaying the measurement and analysis results, and a codec, a speaker, and a headphone connection terminal for visually displaying the measurement and analysis results. The signal processed by the application processor 130 is provided to the user through the output unit 170.

The serial interface unit 180 includes a serial port for exchanging data with an external device (not shown). The system manager may manage or debug the noise vibration analysis apparatus 100 through the serial interface unit 180.

The input unit 190 is composed of a plurality of keypads to receive various commands from the user. If the display provided in the output unit 170 is a touch screen, the keypad is selectively provided.

3 is a flowchart illustrating a method for analyzing noise and vibration in accordance with a preferred embodiment of the present invention.

Referring to FIG. 3, when power is applied to the apparatus for analyzing noise and vibration according to the present invention, power is supplied to the sensor unit 110 according to whether or not a program installed in the application processor 130 is set (S310). ). In this state in which the power is supplied, the noise vibration analysis apparatus 100 checks whether a measurement command is applied from the user through the input unit 190 (S320). If a measurement command is applied from the user (S330-Y), the noise vibration analysis apparatus 100 collects an acoustic signal through the microphone 111 provided in the sensor unit 110, and is provided in the sensor unit 110. Vibration data is collected through the acceleration sensor 113 (S340).

Thereafter, the noise vibration analysis apparatus 100 obtains environmental vibration noise data and blasting vibration noise data from the collected sound signals and vibration data (S350). Since the process of acquiring environmental vibration noise data (Ln value, etc.) and blasting vibration noise data (PVS values, etc.) from the collected sound signals and vibration data has been described above, a detailed description thereof will be omitted.

Then, the noise vibration analysis apparatus 100 stores or outputs the obtained environmental vibration noise data and the blast vibration noise data (S360).

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer apparatus is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like in the form of a carrier wave . In addition, the computer-readable recording medium may be distributed to computer devices connected to a wired / wireless communication network, and a computer-readable code may be stored and executed in a distributed manner.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the appended claims.

100: noise and vibration analysis device, 110: sensor unit,
120: storage unit, 130: application processor,
140: CPLD, 150: data acquisition unit,
160: power supply unit, 170: output unit,
180: serial interface unit, 190: input unit

Claims (4)

A sensor unit including a microphone for collecting an acoustic signal and outputting an analog electrical signal and an acceleration sensor for collecting vibration data and outputting an analog electrical signal;
Converts the analog electrical signal input from the microphone and the analog electrical signal input from the acceleration sensor into digital signals to obtain environmental vibration noise data and blast vibration noise data, and obtains the environmental vibration noise data and the blast vibration noise data A data acquisition unit for outputting a;
When the measurement command is applied, the control command for instructing to output the environmental vibration noise data and the blast vibration noise data obtained from the acoustic signal collected by the microphone provided in the sensor unit and the vibration data collected by the acceleration sensor; An application processor configured to output the data signal to the data acquisition unit, store the digital signal output from the data acquisition unit, and display the digital signal output from the data acquisition unit;
A storage unit for storing a digital signal output from the data acquisition unit under control of the application processor; And
And an output unit for visually or audibly displaying the digital signal output from the data acquisition unit under the control of the application processor. The method of claim 1,
The data acquisition unit,
A high pass filter (HPF) is applied to discrete signals in three channels of the X-axis, the Y-axis, and the Z-axis input from the microphone and the acceleration sensor to obtain a value above a preset cutoff frequency, and An environmental vibration noise data acquisition unit for acquiring the environmental vibration noise data from a value of one or more cutoff frequencies; And
A band pass filter (BPF) is applied to discrete signals in three channels of the X-axis, the Y-axis, and the Z-axis input from the microphone and the acceleration sensor to acquire a value of a predetermined specific band, and Noise vibration analysis device comprising a; blast vibration noise data acquisition unit for obtaining the blast vibration noise data from a value of a specific band. Receiving an analog electrical signal from a microphone for collecting an acoustic signal and an analog electrical signal from an acceleration sensor for collecting vibration data;
Converting the analog electric signal input from the microphone and the analog electric signal input from the acceleration sensor into a digital signal to obtain environmental vibration noise data and blast vibration noise data;
Storing the environmental vibration noise data and the blast vibration noise data; And
And visually or acoustically displaying the environmental vibration noise data and the blast vibration noise data. The method of claim 3,
The data acquisition step,
A high pass filter (HPF) is applied to discrete signals in three channels of the X-axis, the Y-axis, and the Z-axis input from the microphone and the acceleration sensor to obtain a value above a preset cutoff frequency, and Obtaining the environmental vibration noise data from a value of at least one cut off frequency; And
A band pass filter (BPF) is applied to discrete signals in three channels of the X-axis, the Y-axis, and the Z-axis input from the microphone and the acceleration sensor to acquire a value of a predetermined specific band, and And acquiring the blast vibration noise data from a value of a specific band.

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