CN217331378U - Noise monitoring appearance with attitude control function - Google Patents
Noise monitoring appearance with attitude control function Download PDFInfo
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- CN217331378U CN217331378U CN202220019297.6U CN202220019297U CN217331378U CN 217331378 U CN217331378 U CN 217331378U CN 202220019297 U CN202220019297 U CN 202220019297U CN 217331378 U CN217331378 U CN 217331378U
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Abstract
The utility model discloses a noise monitoring appearance with attitude control function, including consecutive sensor, leading level and noise monitoring appearance host computer, the noise monitoring appearance host computer includes shell, mainboard and display module, the mainboard links to each other with leading level, display module respectively. Above-mentioned technical scheme reads acceleration value in real time through integrated acceleration sensor in noise monitor, calculates noise monitor's installation gesture according to the value of x, y and z axle, and the judgement belongs to the level or vertical placing, sets up the microphone type automatically, realizes improving work efficiency to the accurate measurement of noise.
Description
Technical Field
The utility model relates to an acoustics measures technical field, especially relates to a noise monitoring appearance with gesture control function.
Background
The data display is available, and the noise monitors (sound level meters) are horizontally placed according to different use places and the requirements of some places to point to sound sources; some need to be placed vertically, perpendicular to the sound source. When the microphone is horizontally placed, the free field type microphone is used, when the microphone is vertically placed, the pressure field type microphone is used, and the free field type microphone can be used as the pressure field type microphone after typical correction of an embedded program, so that whether correction is needed to be carried out or not is selected according to the installation posture of an instrument when the microphone is used. However, in use, due to the waterproof consideration of the outdoor noise monitor, the keys are generally installed in the housing, and the housing needs to be disassembled for setting, which is very inconvenient, and users often ignore the problem, resulting in inaccurate measurement results.
Chinese patent document CN205228635U discloses an "online noise monitor". The system comprises a core board, a 3G router connected with the core board, a TF card connected with the core board, and a sound sensor connected with the core board. The technical scheme is inconvenient to adjust the installation posture during use and influences the accuracy of the measurement result.
Disclosure of Invention
The utility model discloses mainly solve the installation gesture of being not convenient for adjust when original technical scheme uses, influence the technical problem of measuring result accuracy, provide a noise monitoring appearance with attitude control function, through integrated acceleration sensor in the noise monitoring appearance, read the acceleration value in real time, calculate the installation gesture of noise monitoring appearance according to the value of x, y and z axle, judge to belong to level or vertical placing, the automatic microphone type that sets up realizes improving work efficiency to the accurate measurement of noise.
The above technical problem of the present invention can be solved by the following technical solutions: the utility model discloses a consecutive sensor, leading level and noise monitor host computer, the noise monitor host computer includes shell, mainboard and display module, the mainboard links to each other with leading level, display module respectively. The effect of microphone is with the signal of telecommunication of sound conversion, because the equivalent capacitance of this sensor only 20pF, impedance in audio frequency range is very high, and the input impedance of later stage operational amplifier is not high enough, consequently need do impedance match, and the prestage input impedance is high, and output impedance is low, consequently can play impedance match's effect, and the noise monitoring appearance host computer is used for realizing gesture judgement and sound signal collection.
Preferably, the main board comprises an MCU central processor, an ADC module, an acceleration sensor, a data storage module and a signal conditioning module, wherein the ADC module, the acceleration sensor and the data storage module are respectively connected with the MCU central processor, and the signal conditioning module is connected with the ADC module. The MCU central processor performs various calculation analysis, response interruption and recording, controls the display to perform corresponding display, converts an analog signal into a digital signal by the ADC module, the acceleration sensor is a triaxial gravity accelerometer and is used for acquiring triaxial acceleration values, the storage module is used for storing measurement results, and the display module displays information such as real-time noise values.
Preferably, the signal conditioning module comprises a chip U1, the 1 end of the chip U1 is connected with the ADC module, the 2 end of the chip U1 is connected with the 1 end of the chip U1, and the 3 end of the chip U1 is connected with the front-end stage through a capacitor C1 and is grounded through a resistor R1. The capacitor C1 is used for removing the DC component of the output end of the front-end stage and then transmitting the DC component to the input end of the operational amplifier; the chip U1 is used for signal conditioning and impedance matching.
Preferably, the MCU central processor comprises a signal processing module, the signal processing module is connected with the acceleration sensor through a signal receiving module, and the signal processing module further comprises a signal output module connected with the display module. The acceleration sensor chip is installed in the middle of the mainboard and is connected with the MCU through the IIC bus. MCU reads acceleration sensor data g in real time x ，g y And g z According to formula horizontal acceleration value
The installation angle of the instrument is theta-g z /(g z +g xy ) 90 °, calculating the pose of the instrument installation; when the angle is less than 45 degrees, the microphone is horizontally placed, and the type of the microphone is automatically set to be a free field type; the pressure field type is automatically set when the temperature is more than 45 degrees. Meanwhile, the MCU reads the data of the ADC module, performs corresponding digital filtering according to the posture of the instrument, and then performs instantaneous sound pressure level Lp, statistical sound levels (LeqT, Ln, SD and the like), integrationCalculation of indices (various computational analyses) of sound levels (Lmax, Lmin, Lpeak, etc.), 1/1OCT, 1/3OCT, etc.
Preferably, the MCU central processor is respectively connected with the ADC module and the acceleration sensor through an I2C bus. The signal transmission is realized by connecting an I2C bus with the central processor MCU.
Preferably, the top end of the shell is provided with a pointed cone, a windproof cover is arranged below the pointed cone, the sensor is arranged on the inner side of the shell corresponding to the windproof cover, and the preposed stage is arranged below the sensor. The wind cap is used for avoiding external factor interference, and the pointed cone plays a protective role.
The utility model has the advantages that: through integrated acceleration sensor in noise monitoring appearance, read acceleration value in real time, calculate noise monitoring appearance's installation gesture according to the value of x, y and z axle, judge to belong to the level or vertical placing, the automatic microphone type that sets up realizes improving work efficiency to the accurate measurement of noise.
Drawings
Fig. 1 is a circuit connection structure diagram of the present invention.
Fig. 2 is a working schematic diagram of the present invention.
Fig. 3 is a schematic structural diagram of the present invention.
In the figure, a microphone 1, a front-end stage 2, a noise monitor host 3, a signal conditioning module 3.1, an ADC module 3.2, a MCU central processor 3.3, an acceleration sensor 3.4, a data memory 3.5, a display module 3.6, a pointed cone 3.7 and a windshield 3.8 are arranged.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example (b): the noise monitor with the posture control function of this embodiment, as shown in fig. 1, including consecutive microphone 1, leading level 2 and noise monitor host computer 3, noise monitor host computer 3 includes shell, mainboard and display module 3.6, the mainboard links to each other with leading level 2, display module 3.6 respectively. As shown in fig. 3, a pointed cone 3.7 is arranged at the top end of the casing, a wind shield 3.8 is arranged below the pointed cone 3.7, the microphone 1 is arranged at the inner side of the casing corresponding to the wind shield 3.8, and the front stage 2 is arranged below the microphone 1. The wind cap is used for avoiding external factor interference, and the pointed cone plays a protective role. The microphone is used for converting sound into an electric signal, the equivalent capacitance of the sensor is only 20pF, the impedance in an audio frequency range is very high, the input impedance of the rear-stage operational amplifier is not high enough, so that impedance matching is needed, the input impedance of the front-stage operational amplifier is high, the output impedance is low, the impedance matching effect can be achieved, and the noise monitor host is used for achieving posture judgment and sound signal acquisition.
The mainboard comprises an MCU central processor 3.3, an ADC module 3.2, an acceleration sensor 3.4 and a data storage module 3.5 which are respectively connected with the MCU central processor 3.3, and further comprises a signal conditioning module 3.1 connected with the ADC module 3.2. The MCU central processor performs various calculation analysis, response interruption and recording, controls the display to perform corresponding display, converts an analog signal into a digital signal by the ADC module, the acceleration sensor is a triaxial gravity accelerometer and is used for acquiring triaxial acceleration values, the storage module is used for storing measurement results, and the display module displays information such as real-time noise values. The signal conditioning module 3.1 comprises a chip U1, wherein the 1 end of the chip U1 is connected with the ADC module 3.2, the 2 end of the chip U1 is connected with the 1 end of the chip U1, and the 3 end of the chip U1 is connected with the front-end stage 2 through a capacitor C1 and is grounded through a resistor R1. The capacitor C1 is used for removing the DC component at the output end of the pre-stage and then transmitting the DC component to the input end of the operational amplifier; the chip U1 is used for signal conditioning and impedance matching.
As shown in fig. 2, the MCU central processor 3.3 includes a signal processing module connected to the acceleration sensor 3.4 via a signal receiving module, and a signal output module connected to the display module 3.6. MCU central processing unit 3.3 includes signal processing module, signal processing module passes through signal reception module and links to each other with acceleration sensor 3.4, still includes the signal output module who links to each other with display module 3.6. The MCU central processor 3.3 is respectively connected with the ADC module 3.2 and the acceleration sensor 3.4 through an I2C bus. The acceleration sensor chip is installed in the middle of the mainboard and is connected with the MCU through the IIC bus. MCU real-time reading accelerationDegree sensor data g x ，g y And g z According to formula horizontal acceleration value
The installation angle of the instrument is theta-g z /(g z +g xy ) 90 degrees, calculating the installation posture of the instrument; when the angle is less than 45 degrees, the microphone is horizontally placed, and the type of the microphone is automatically set to be a free field type; the pressure field type is automatically set when the temperature is more than 45 degrees. Meanwhile, the MCU reads the data of the ADC module, performs corresponding digital filtering according to the placing posture of the instrument, and then calculates indexes (various computational analysis) such as instantaneous sound pressure level Lp, statistical sound levels (LeqT, Ln, SD and the like), integral sound levels (Lmax, Lmin, Lpeak and the like), 1/1OCT, 1/3OCT and the like.
When the device works, the microphone 1 converts an acoustic signal into an electric signal, and the electric signal enters the host after impedance transformation of a front stage; the electric signal enters ADC to change after being conditioned by the signal, and the data is stored in a cache; meanwhile, the MCU central controller 3.3 reads the triaxial acceleration value through I2C, calculates the installation attitude of the noise monitor (sound level meter), calculates the angle of the microphone, and selects a microphone directivity correction network (digital filter) designed in advance. The MCU central processor 3.3 filters the data buffered in the buffer area. The MCU central processor processes and analyzes data, and the result is stored in a storage area and can be displayed in real time through the display.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the terms microphone, noise monitor main unit, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (6)
1. The utility model provides a noise monitoring appearance with attitude control function, its characterized in that, is including consecutive microphone (1), leading level (2) and noise monitoring appearance host computer (3), noise monitoring appearance host computer (3) are including shell, mainboard and display module (3.6), the mainboard links to each other with leading level (2), display module (3.6) respectively.
2. The noise monitor with the attitude control function according to claim 1, wherein the main board comprises an MCU central processor (3.3), and an ADC module (3.2), an acceleration sensor (3.4), a data storage module (3.5) respectively connected to the MCU central processor (3.3), and further comprises a signal conditioning module (3.1) connected to the ADC module (3.2).
3. The noise monitor with posture control function according to claim 2, wherein the signal conditioning module (3.1) comprises a chip U1, the terminal 1 of the chip U1 is connected to the ADC module (3.2), the terminal 2 of the chip U1 is connected to the terminal 1 of the chip U1, and the terminal 3 of the chip U1 is connected to the pre-stage (2) via a capacitor C1 and is grounded via a resistor R1.
4. The noise monitor with the posture control function as claimed in claim 2, wherein the MCU central processor (3.3) comprises a signal processing module, the signal processing module is connected to the acceleration sensor (3.4) via a signal receiving module, and a signal output module connected to the display module (3.6).
5. The noise monitor with the attitude control function according to claim 2 or 4, wherein the MCU central processor (3.3) is respectively connected with the ADC module (3.2) and the acceleration sensor (3.4) through an I2C bus.
6. The noise monitor with the posture control function according to claim 1, wherein a pointed cone (3.7) is arranged at the top end of the housing, a wind-proof cover (3.8) is arranged below the pointed cone (3.7), the microphone (1) is arranged on the inner side of the housing corresponding to the wind-proof cover (3.8), and the front stage (2) is arranged below the microphone (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220019297.6U CN217331378U (en) | 2022-01-06 | 2022-01-06 | Noise monitoring appearance with attitude control function |
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| CN202220019297.6U CN217331378U (en) | 2022-01-06 | 2022-01-06 | Noise monitoring appearance with attitude control function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117928723A (en) * | 2024-01-26 | 2024-04-26 | 杭州爱华仪器有限公司 | Sound level meter, noise measurement system and fan housing automatic identification correction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117928723A (en) * | 2024-01-26 | 2024-04-26 | 杭州爱华仪器有限公司 | Sound level meter, noise measurement system and fan housing automatic identification correction method |
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