CN201926500U - Ultra low power consumption digital sound level meter based on WIFI (Wireless Fidelity) - Google Patents
Ultra low power consumption digital sound level meter based on WIFI (Wireless Fidelity) Download PDFInfo
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- CN201926500U CN201926500U CN2010206108322U CN201020610832U CN201926500U CN 201926500 U CN201926500 U CN 201926500U CN 2010206108322 U CN2010206108322 U CN 2010206108322U CN 201020610832 U CN201020610832 U CN 201020610832U CN 201926500 U CN201926500 U CN 201926500U
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Abstract
The utility model discloses an ultra low power consumption digital sound level meter based on WIFI (Wireless Fidelity), which comprises a power supply, a sound pressure converter, an A weighting amplifier, an effective value radiodetector, a logarithmic converter, an analog-to-digital converter, a microprocessor, a WIFI label and a display, wherein the sound pressure converter, the A weighting amplifier, the effective value radiodetector, the logarithmic converter, the analog-to-digital converter, the microprocessor, the WIFI label and the display are sequentially connected, and the WIFI label is connected with the microprocessor. The ultra low power consumption digital sound level meter based on the WIFI can be arranged in a noise source region such as a building construction place and places near public places of entertainment, is used for monitoring noise value in real time and uploading the noise value by a WIFI network, and conveniently provides effective data evidences for supervision and law enforcement personnel.
Description
Technical field
The utility model relates to sensor field, relates in particular to a kind of super low-power consumption digital sound level meter based on WIFI.
Background technology
According to the common recognition that the Kyoto Protocol, Bali route map and Copenhagen meeting are reached, each state is all making great efforts to avoid climate change to the harm that the earth caused, and the target that Chinese Government promises to undertake is: to the year two thousand twenty concentration of carbon is reduced 40-45%.Environmental change is closely bound up with our life, how to collect and issues our environmental change, allows quality of life is transparent to have changed into primary work.
Sound meter all occupies important status as a kind of the most the most frequently used noise-measuring instrument in noise measurement work and noise control engineering, but noise is difficult for its evidence obtaining as the pollution source in the certain hour section.Existing sound meter does not have network function, can not upload noise signal, has brought difficulty hugely for the evidence obtaining of noise and complaint.
The utility model content
The technical matters that the utility model mainly solves provides a kind of super low-power consumption digital sound level meter based on WIFI that network is uploaded noise signal that has.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of super low-power consumption digital sound level meter based on WIFI is provided, comprise the WIFI label that is used to gather the digital sound meter module of digital noise signal and is used for Network Transmission, described digital sound meter module and WIFI label are electrically connected.
Wherein, described digital sound meter module comprises the power supply that is used to digital sound level meter that electric energy is provided, the acoustic pressure converter that is used to detect noise and voice signal is converted to voltage analog signal, be used for the voltage analog signal conversion is the A weighted amplifier of people's ear frequency characteristic signal, be used for rms detector with the direct current signal of the tested in proportion to acoustic pressure effective value of AC signal conversion, be used for output signal is converted to log-convertor with the proportional electric signal of sound pressure level, be used for analog signal conversion is the analog to digital converter of digital signal, be used for digital signal is carried out the microprocessor of analyzing and processing, described acoustic pressure converter, A weighted amplifier, rms detector, log-convertor, analog to digital converter, microprocessor and WIFI label are linked in sequence.
Wherein, described super low-power consumption digital sound level meter based on WIFI comprises being used to measure the peaked holding circuit of sound level in a certain period that described holding circuit is connected between log-convertor and the microprocessor.
Wherein, described super low-power consumption digital sound level meter based on WIFI comprises the range observation circuit, and described range observation circuit is connected between log-convertor and the microprocessor.
Wherein, described super low-power consumption digital sound level meter based on WIFI comprises the attenuator that is used for whole measurement range is divided into three ranges of the 20dB that overlaps each other, and described attenuator is connected between acoustic pressure converter and the A weighted amplifier.
Wherein, described super low-power consumption digital sound level meter based on WIFI comprises electric source monitoring circuit, and described electric source monitoring circuit is connected between power supply and the microprocessor.
Wherein, described super low-power consumption digital sound level meter based on WIFI comprises display, and described display is connected with described microprocessor.
The beneficial effects of the utility model are: the sound meter that is different from prior art can not solve the evidence obtaining complaint difficult problem of noise, the utility model can be placed near noise cradle such as building operation ground and the public place of entertainment based on the super low-power consumption digital sound level meter of WIFI, monitor level of noise in real time, utilize the WIFI network to upload level of noise, provide the active data evidence for the supervision law enfrocement official easily.
Description of drawings
Fig. 1 is the block diagram of the utility model based on super low-power consumption digital sound level meter first embodiment of WIFI;
Fig. 2 is the block diagram of the utility model based on super low-power consumption digital sound level meter second embodiment of WIFI;
Fig. 3 is the block diagram of the utility model based on super low-power consumption digital sound level meter the 3rd embodiment of WIFI;
Fig. 4 is the block diagram of the utility model based on super low-power consumption digital sound level meter the 4th embodiment of WIFI.
Embodiment
By describing technology contents of the present utility model, structural attitude in detail, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
Wi-Fi is a wireless network communication technique, PC, handheld device (as PDA, mobile phone) etc. can be had the equipment of WIFI terminal with the interconnected technology of wireless mode.
See also Fig. 1, among first embodiment of the utility model based on the super low-power consumption digital sound level meter of WIFI, comprise the power supply (not shown) that is used to digital sound level meter that electric energy is provided, the acoustic pressure converter 10 that is used to detect noise and voice signal is converted to voltage analog signal, be used for the voltage analog signal conversion is the A weighted amplifier 11 of people's ear frequency characteristic signal, be used for rms detector 12 with the direct current signal of the tested in proportion to acoustic pressure effective value of AC signal conversion, be used for output signal is converted to log-convertor 13 with the proportional electric signal of sound pressure level, be used for analog signal conversion is the analog to digital converter 14 of digital signal, the microprocessor 15 that is used for digital signal is carried out analyzing and processing will be connected the WIFI label 16 of WIFI network, described acoustic pressure converter 10 with being used for after the signal after the microprocessor processes adds label value, A weighted amplifier 11, rms detector 12, log-convertor 13, analog to digital converter 14, microprocessor 15 and WIFI label 16 are linked in sequence.
The sound meter that is different from prior art can not solve the evidence obtaining complaint difficult problem of noise, the utility model can be placed near noise cradle such as building operation ground and the public place of entertainment based on the super low-power consumption digital sound level meter of WIFI, monitor level of noise in real time, utilize the WIFI network to upload level of noise, provide the active data evidence for the supervision law enfrocement official easily.
Referring to Fig. 2, all technical characterictics that comprise first embodiment in a second embodiment, difference is: described super low-power consumption digital sound level meter based on WIFI, also comprise being used to measure the peaked holding circuit 17 of sound level in a certain period, described holding circuit 17 is connected between log-convertor 13 and the microprocessor 15.
Referring to Fig. 3, all technical characterictics that in the 3rd embodiment, comprise second embodiment, difference is: described super low-power consumption digital sound level meter based on WIFI, also comprise range observation circuit 18, and described range observation circuit 18 is connected between log-convertor 13 and the microprocessor 15.
Referring to Fig. 4, all technical characterictics that in the 4th embodiment, comprise the 3rd embodiment, difference is: described super low-power consumption digital sound level meter based on WIFI, also comprise the attenuator 19 that is used for whole measurement range is divided into three ranges of the 20dB that overlaps each other, described attenuator 19 is connected between acoustic pressure converter 10 and the A weighted amplifier 11.
In one embodiment, described super low-power consumption digital sound level meter based on WIFI also comprises the electric source monitoring circuit (not shown), and described electric source monitoring circuit is connected between power supply and the microprocessor 15.
In one embodiment, described super low-power consumption digital sound level meter based on WIFI comprises display, and described display is connected with described microprocessor.
The course of work of the present utility model is: microphone converts tested acoustic pressure to correspondent voltage output, converts the high resistant output signal of microphone to low-resistance signal that follow-up circuit can be accepted through prime amplifier.Design an attenuator after the prime amplifier, it is divided into whole measurement range three ranges of the 20dB that overlaps each other.Signal is sent to rms detector after handling through the A weighted of amplification and anthropomorphic dummy's ear frequency characteristic, and rms detector is with the direct current signal of the tested in proportion to acoustic pressure effective value of AC signal conversion.Can select " F " or " S " time character of weighting of International standardization for use by time weighted switch.Signal after the time weighted is average is delivered to logarithmic amplifier, and logarithmic amplifier will be exported and the proportional electric signal of sound pressure level.In the two-channel output plughole, can obtain the alternating current output signal and the direct-flow output signal that become logarithmic relationship linear with tested acoustic pressure, they can be delivered to level recorder, magnetic tape recorder etc. and make time domain record, or deliver to frequency spectrograph and do frequency-domain analysis, also can deliver to intelligence instruments such as noise level analyzer and carry out data processing.In output circuit, be provided with holding circuit, be used to measure the maximal value of sound level in a certain period.Deliver to the range totalizer from the signal of output circuit, the range totalizer is according to the position of range controller, automatically add the range truth of a matter, make display directly show last measurement result, analog to digital converter is used for changing analog quantity into digital quantity, by flush bonding processor the data of gathering are carried out certain data processing, and by the WIFI network, the noise mean value in certain sampling period, peak value, noise informations such as instantaneous value are transferred to data center, join after data center handles the noise transducer data of different MAC Address respectively in the databases such as SQL/Oracle, authorized user can be visited Web server by Internet and be checked corresponding data.
Principle of work of the present utility model is: based on the super low-power consumption digital sound level meter of WIFI is to draw the foreign latest technology. a kind of novel sound meter of researching and developing in conjunction with China's concrete condition.It is except that the general utility functions with sound meter, also have range monitoring, automatic range switching, functions such as battery voltage monitoring, and the setting sampling interval is set, can (telecommunications Chinanet moves CMCC by the WIFI wireless network, the ChinaUnicom of UNICOM) links with server, realize measuring automatically and record.This noise meter is realized super low-power consumption, and average power consumption is less than 500 microwatts.
Sound meter be a kind of be the instrument that unit indicates tested sound pressure level and weighted sound pressure level with dB.Sound pressure level is defined as:
In the formula, P
0-reference sound pressure, its value are 2 * 10-5Pa; The effective value of the tested acoustic pressure of P-, unit are Pa.
And
In the formula, P (t)-tested instantaneous sound pressure. unit is Pa.
Sound meter is to adopt electric method to measure sound. convert tested acoustic pressure p (t) to correspondent voltage u (t) with microphone.
u(t)＝S·p(t) (3)
In the formula, S is the sound pressure sensitivity of microphone, current widely used microphone, and its sensitivity is generally 50mV/Pa.
With (2), (3) formula substitution (1) formula, after the arrangement:
Lp＝20lgU+C (4)
In the formula,
Be the effective value of u (t),
(4) formula has been set up getting in touch of sound pressure level and microphone output voltage effective value, according to standard code, voltage U is carried out the time weighted and the frequency weighted of anthropomorphic dummy's ear characteristic and handles, and can obtain so-called weighted sound pressure level is sound level.This is the theoretical foundation of design sound meter.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (7)
1. the super low-power consumption digital sound level meter based on WIFI is characterized in that: comprise the WIFI label that is used to gather the digital sound meter module of digital noise signal and is used for Network Transmission, described digital sound meter module and the electrical connection of WIFI label.
2. the super low-power consumption digital sound level meter based on WIFI according to claim 1, it is characterized in that: described digital sound meter module comprises the power supply that is used to digital sound level meter that electric energy is provided, the acoustic pressure converter that is used to detect noise and voice signal is converted to voltage analog signal, be used for the voltage analog signal conversion is the A weighted amplifier of people's ear frequency characteristic signal, be used for rms detector with the direct current signal of the tested in proportion to acoustic pressure effective value of AC signal conversion, be used for output signal is converted to log-convertor with the proportional electric signal of sound pressure level, be used for analog signal conversion is the analog to digital converter of digital signal, be used for digital signal is carried out the microprocessor of analyzing and processing, described acoustic pressure converter, A weighted amplifier, rms detector, log-convertor, analog to digital converter, microprocessor and WIFI label are linked in sequence.
3. the super low-power consumption digital sound level meter based on WIFI according to claim 2 is characterized in that: comprise being used to measure the peaked holding circuit of sound level in a certain period, described holding circuit is connected between log-convertor and the microprocessor.
4. the super low-power consumption digital sound level meter based on WIFI according to claim 3 is characterized in that: comprise the range observation circuit, described range observation circuit is connected between log-convertor and the microprocessor.
5. the super low-power consumption digital sound level meter based on WIFI according to claim 4, it is characterized in that: comprise the attenuator that is used for whole measurement range is divided into three ranges of the 20dB that overlaps each other, described attenuator is connected between acoustic pressure converter and the A weighted amplifier.
6. the super low-power consumption digital sound level meter based on WIFI according to claim 5 is characterized in that: comprise electric source monitoring circuit, described electric source monitoring circuit is connected between power supply and the microprocessor.
7. the super low-power consumption digital sound level meter based on WIFI according to claim 6 is characterized in that: comprise display, described display is connected with described microprocessor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206108322U CN201926500U (en) | 2010-11-16 | 2010-11-16 | Ultra low power consumption digital sound level meter based on WIFI (Wireless Fidelity) |
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| CN2010206108322U CN201926500U (en) | 2010-11-16 | 2010-11-16 | Ultra low power consumption digital sound level meter based on WIFI (Wireless Fidelity) |
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| CN201926500U true CN201926500U (en) | 2011-08-10 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152687A (en) * | 2013-03-19 | 2013-06-12 | 张巍 | Loudspeaker and sound pressure detection device based on wireless network |
| CN105181116A (en) * | 2015-05-27 | 2015-12-23 | 智联通建筑科技（北京）有限公司 | Portable digital noise meter |
| CN105606209A (en) * | 2016-03-14 | 2016-05-25 | 南京铁道职业技术学院 | System for monitoring indoor noise |
| CN107228709A (en) * | 2017-05-19 | 2017-10-03 | 亿信标准认证集团有限公司 | Square noise intensity detector |
| CN108444588A (en) * | 2018-06-20 | 2018-08-24 | 核工业理化工程研究院 | The noise high precision measuring device of high rotation speed servo motor |
| CN108801443A (en) * | 2018-06-20 | 2018-11-13 | 核工业理化工程研究院 | The noise high precision measuring device and measurement method of high rotation speed servo motor |
| CN110031083A (en) * | 2018-12-31 | 2019-07-19 | 瑞声科技(新加坡)有限公司 | A kind of noise overall sound pressure level measurement method, system and computer readable storage medium |
| CN112146746A (en) * | 2020-11-26 | 2020-12-29 | 上海小慧智能科技有限公司 | Sound level metering method and sound level meter |
-
2010
- 2010-11-16 CN CN2010206108322U patent/CN201926500U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152687A (en) * | 2013-03-19 | 2013-06-12 | 张巍 | Loudspeaker and sound pressure detection device based on wireless network |
| CN103152687B (en) * | 2013-03-19 | 2015-11-18 | 张巍 | A kind of loud speaker based on wireless network and sound pressure detection device |
| CN105181116A (en) * | 2015-05-27 | 2015-12-23 | 智联通建筑科技（北京）有限公司 | Portable digital noise meter |
| CN105606209A (en) * | 2016-03-14 | 2016-05-25 | 南京铁道职业技术学院 | System for monitoring indoor noise |
| CN107228709A (en) * | 2017-05-19 | 2017-10-03 | 亿信标准认证集团有限公司 | Square noise intensity detector |
| CN108444588A (en) * | 2018-06-20 | 2018-08-24 | 核工业理化工程研究院 | The noise high precision measuring device of high rotation speed servo motor |
| CN108801443A (en) * | 2018-06-20 | 2018-11-13 | 核工业理化工程研究院 | The noise high precision measuring device and measurement method of high rotation speed servo motor |
| CN110031083A (en) * | 2018-12-31 | 2019-07-19 | 瑞声科技(新加坡)有限公司 | A kind of noise overall sound pressure level measurement method, system and computer readable storage medium |
| WO2020140593A1 (en) * | 2018-12-31 | 2020-07-09 | 瑞声声学科技(深圳)有限公司 | Method and system for measuring total sound pressure level of noise, and computer-readable storage medium |
| CN112146746A (en) * | 2020-11-26 | 2020-12-29 | 上海小慧智能科技有限公司 | Sound level metering method and sound level meter |
| CN112146746B (en) * | 2020-11-26 | 2021-08-24 | 上海小慧智能科技有限公司 | Sound level metering method and sound level meter |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20131116 |