CN105115590A - Environmental noise measuring instrument based on sine wave inverter power supply - Google Patents
Environmental noise measuring instrument based on sine wave inverter power supply Download PDFInfo
- Publication number
- CN105115590A CN105115590A CN201510540705.7A CN201510540705A CN105115590A CN 105115590 A CN105115590 A CN 105115590A CN 201510540705 A CN201510540705 A CN 201510540705A CN 105115590 A CN105115590 A CN 105115590A
- Authority
- CN
- China
- Prior art keywords
- module
- sine
- circuit
- micro controller
- environmental noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses an environmental noise measuring instrument based on a sine wave inverter power supply, which comprises an electrets sensor, a three-stage amplifying circuit, a V/F conversion module, a microcontroller module, a decoder, an LED nixie tube and a power supply module, wherein the electrets sensor is connected with the microcontroller module sequentially via the three-stage amplifying circuit and the V/F conversion module; the microcontroller module is connected with the LED nixie tube via the decoder; and the power supply module is respectively connected with the electrets sensor, the three-stage amplifying circuit, the V/F conversion module, the microcontroller module, the decoder and the LED nixie tube. The environmental noise measuring instrument based on the sine wave inverter power supply is stable in work, good in performance, low in cost, can meet general civil needs after calibration and validation, and can be widely applied to places such as industrial and mining enterprises, departments and schools which need to measure and control the environmental noise.
Description
Technical field
The present invention relates to a kind of noise detection system, particularly relate to a kind of environmental noise measurement instrument based on sine-wave inverter, belong to neighbourhood noise Automatic Measurement Technique field.
Background technology
Environment noise monitoring is that the mankind improve the quality of living, an important step of strengthen environmental protection, and in each metropolitan bustling block and residential block, existing large-scale neighbourhood noise display erects street corner.But portable noise-measuring instrument domestic at present, mostly is expensive import specialized equipment, except the environmental protection such as health, metering specialized department has, cannot popularize as civil goods.
At present, the new technology of data acquisition and procession, new method cause its innovation and change directly or indirectly, and emulation technology described in real-time monitoring and simulating technology comprises that sensor, data acquisition, microcomputer chip data, programmable controller PLC, fieldbus process, Row control, curve and animation show, automatic trouble diagnosis and report output etc. bring up to a brand-new level data acquisition and procession technology.
Along with the fast development of China's economy and the continuous progress of society, the requirement of environmental protection is rooted in the hearts of the people, and the noise problem of living environment causes increasing concern socially, and noise monitoring becomes necessity work of environmental administration.But, up to now, Environmental Protection in China department detects data and there is a large amount of huge expenditure in management, hardware cost etc., more difficultly realize unified management and information sharing, make that the efficiency of management is low, equipment investment expense is large, final-period management maintenance cost is high, cannot give full play to the high-level efficiency of informationization technology.
Such as application number is the environmental noise measurement instrument that " 201020143967.2 " have the functions such as GPS location, and include PDA module, PDA module is circumscribed with digital to analog converter, GPS module, MP3 module, display screen and SD card, and GPS module is circumscribed with gps antenna; Also include microphone, the output signal of microphone accesses digital to analog converter by prime amplifier, and PDA module is also circumscribed with GPRS or CDMA module by memory buffer, and GPRS or CDMA module are circumscribed with emitting antenna.This utility model is simple to operate, precision is high, GPS function and MP3 function are placed in environmental noise measurement instrument simultaneously, be convenient to check measurement result and as environmental law enforcement foundation, the receiving terminal that all information can be arranged to environmental monitoring station or R&D institution by GPRS sends, and is convenient to subsequent treatment and the statistics of measurement result.
And for example application number is a kind of system realizing neighbourhood noise remote monitoring of " 201220490809.3 ", it comprises the noise measuring set, data collecting card, the scene end computing machine possessing Labview development module and the client computer that acoustical signal are converted to analog voltage signal, the output terminal of described noise measuring set is connected with the input end of data collecting card, the output terminal of described data collecting card is connected with the input end of scene end computing machine, and described scene end computing machine is connected by network bi-directional with between client computer.Problem that the present invention efficiently solves that the investment maintenance cost that existing noise monitoring system exists is high, the efficiency of management is low, monitoring information can not be shared etc., improve work efficiency, reduce hardware and management and maintenance cost, there is extremely strong practicality, can wide popularization and application.
Summary of the invention
Technical matters to be solved by this invention provides a kind of environmental noise measurement instrument based on sine-wave inverter for the deficiency of background technology.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of environmental noise measurement instrument based on sine-wave inverter, comprise electret transducer, three-stage amplifier, V/F conversion module, micro controller module, code translator and LED charactron and power module, described electret transducer connects micro controller module by three-stage amplifier, V/F conversion module successively, and described micro controller module connects LED charactron by code translator; Described power module is connected with electret transducer, three-stage amplifier, V/F conversion module, micro controller module, code translator and LED charactron respectively;
Wherein, power module comprises DC push-pull booster circuit, sine-converter circuit, output filter circuit, driving circuit, sample circuit, controller, lattice lcd and auxiliary power module, wherein, described DC push-pull booster circuit, sine-converter circuit, output filter circuit connects successively, the output terminal of described driving circuit respectively with DC push-pull booster circuit, the input end of sine-converter circuit connects, the input end of described sample circuit respectively with DC push-pull booster circuit, sine-converter circuit, the output terminal of output filter circuit connects, the input end of the output terminal connection control device of described sample circuit, the output terminal of described controller connects the input end of driving circuit and lattice lcd respectively, the output terminal of described auxiliary power module connects the input end of driving circuit, sample circuit, controller and lattice lcd respectively,
Wherein, electret transducer, for converting surrounding enviroment noise to electric signal;
Three-stage amplifier, amplifies process for carrying out three grades to the neighbourhood noise converting electric signal to;
V/F conversion module, for converting frequency signal transmission to micro controller module by amplifying the electric signal after processing;
Micro controller module, for the frequency signal output pulse frequency according to reception, and then draws noise acoustic pressure;
Code translator, compresses into row decoding for the sound drawn micro controller module analysis, and then by LED numeral method.
As the further preferred version of a kind of environmental noise measurement instrument based on sine-wave inverter of the present invention, described micro controller module adopts 89C51 single-chip microcomputer.
As the further preferred version of a kind of environmental noise measurement instrument based on sine-wave inverter of the present invention, the chip model of described V/F conversion module is LM331.
As the further preferred version of a kind of environmental noise measurement instrument based on sine-wave inverter of the present invention, the chip model of described three-stage amplifier is LM324.
As the further preferred version of a kind of environmental noise measurement instrument based on sine-wave inverter of the present invention, the chip model of described code translator is 74LS248.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1, the present invention is with 89C51 single-chip microcomputer for core, adopts low cost, portable digital display environment noise measuring set that V/F switch technology is formed.
2, working stability of the present invention, functional, cost is lower, through verification calibration after can meet general civilian needs, the occasion that industrial and mining enterprises, office, school etc. need to measure neighbourhood noise and control can be widely used in.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As shown in Figure 1, a kind of environmental noise measurement instrument based on sine-wave inverter, comprise electret transducer, three-stage amplifier, V/F conversion module, micro controller module, code translator and LED charactron and power module, described electret transducer connects micro controller module by three-stage amplifier, V/F conversion module successively, and described micro controller module connects LED charactron by code translator; Described power module is connected with electret transducer, three-stage amplifier, V/F conversion module, micro controller module, code translator and LED charactron respectively;
Wherein, power module comprises DC push-pull booster circuit, sine-converter circuit, output filter circuit, driving circuit, sample circuit, controller, lattice lcd and auxiliary power module, wherein, described DC push-pull booster circuit, sine-converter circuit, output filter circuit connects successively, the output terminal of described driving circuit respectively with DC push-pull booster circuit, the input end of sine-converter circuit connects, the input end of described sample circuit respectively with DC push-pull booster circuit, sine-converter circuit, the output terminal of output filter circuit connects, the input end of the output terminal connection control device of described sample circuit, the output terminal of described controller connects the input end of driving circuit and lattice lcd respectively, the output terminal of described auxiliary power module connects the input end of driving circuit, sample circuit, controller and lattice lcd respectively,
Wherein, electret transducer, for converting surrounding enviroment noise to electric signal;
Three-stage amplifier, amplifies process for carrying out three grades to the neighbourhood noise converting electric signal to;
V/F conversion module, for converting frequency signal transmission to micro controller module by amplifying the electric signal after processing;
Micro controller module, for the frequency signal output pulse frequency according to reception, and then draws noise acoustic pressure;
Code translator, compresses into row decoding for the sound drawn micro controller module analysis, and then by LED numeral method.
Wherein, described micro controller module adopts 89C51 single-chip microcomputer, and the chip model of described V/F conversion module is LM331, and the chip model of described three-stage amplifier is LM324, and the chip model of described code translator is 74LS248.
The present invention for core, adopts low cost, portable digital display environment noise measuring set that V/F switch technology is formed with 89C51 single-chip microcomputer.Working stability of the present invention, functional, cost is lower, can meet general civilian needs, can be widely used in the occasion that industrial and mining enterprises, office, school etc. need to measure neighbourhood noise and control after verification calibration.
The threshold of audibility of people's ear is generally 20 μ Pa, and the threshold of pain is generally 200Pa, differs 107 times therebetween, and acoustic pressure scope broad so is very not easily measured, and the resolution of people's ear to the relative change of acoustic pressure has nonlinear characteristic.Therefore, in acoustics, usual acoustic arbitrarily downgrades Lp to reflect the change of acoustic pressure, and the sound pressure level meter of acoustic pressure p is shown as Lp=20lg(p/p0(dB) wherein: datum quantity p0 is 20 μ Pa.As p=p0, Lp=0dB, and as p=200Pa, Lp=140dB.
Can sound pressure level be measured with sound meter, adopt 1kHz pure tone input 0.2s to 0.25s or more than 0.5s, true sound pressure level or average sound pressure level can be obtained.Consider the sensation of loudness of people's ear to different frequency, in noise measurement, the inverse curve of often getting 40phon equal loudness contour carries out weighted correction to sound pressure level, namely records A sound level by A weighting network, is write as dB(A).Subordinate list provides the relation between the correcting value of mid-frequency of octave band and A sound level:
Neighbourhood noise converts electric signal to through high sensitivity, non-directive electret microphone.Microphone frequency characteristic used unevenness within the scope of 50 ~ 14000Hz is less than 1.5dB, can be used for outdoor measurement after adding hurricane globe, rain cover.Three-stage amplifier is made up of amplifier LM324, and adjustment related peripheral component parameters, can make its amplitude versus frequency characte close with A weighted curve meticulously.D1, C1, R1 form peak detection network, and it exports the size that DC level reflects noise acoustic pressure.
Form voltage/frequency change-over circuit by LM331, the frequency signal of output becomes the P3.4 pin that Transistor-Transistor Logic level gives single-chip microcomputer, as the count pulse of T0.This change-over circuit is linearly good, and antijamming capability is strong, and reference frequency output is at 10 ~ more than 10000Hz, and its change, than reaching 103, is better than common 8 bit parallel A/D converters, is conducive to the measurement range of raising system.
The core of system is AT89C51 single-chip microcomputer, and its order set and MCS-51 are completely compatible, and is with the E2PROM of 4kB in sheet, can form a minimum measuring system easily.Its P3.5 pin connects the 100kHz square wave of the timer output be made up of NE555, interrupts removing control T0 timer counter by T1.From the counting pulse frequency of T0 end input, also reflects the size of surveyed acoustic pressure.After software process, noise sound displayed value is exported by P1 mouth, drives two 1.8in high-brightness LED numeral method again through 74LS248 decoding, suitably controls code translator and to turn off the light end, make two charactrons in turn luminescence realize Dynamic Announce, reduction power consumption.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, makes a variety of changes under can also or else departing from the prerequisite of present inventive concept.
Claims (5)
1. the environmental noise measurement instrument based on sine-wave inverter, it is characterized in that: comprise electret transducer, three-stage amplifier, V/F conversion module, micro controller module, code translator and LED charactron and power module, described electret transducer connects micro controller module by three-stage amplifier, V/F conversion module successively, and described micro controller module connects LED charactron by code translator; Described power module is connected with electret transducer, three-stage amplifier, V/F conversion module, micro controller module, code translator and LED charactron respectively;
Wherein, power module comprises DC push-pull booster circuit, sine-converter circuit, output filter circuit, driving circuit, sample circuit, controller, lattice lcd and auxiliary power module, wherein, described DC push-pull booster circuit, sine-converter circuit, output filter circuit connects successively, the output terminal of described driving circuit respectively with DC push-pull booster circuit, the input end of sine-converter circuit connects, the input end of described sample circuit respectively with DC push-pull booster circuit, sine-converter circuit, the output terminal of output filter circuit connects, the input end of the output terminal connection control device of described sample circuit, the output terminal of described controller connects the input end of driving circuit and lattice lcd respectively, the output terminal of described auxiliary power module connects the input end of driving circuit, sample circuit, controller and lattice lcd respectively,
Wherein, electret transducer, for converting surrounding enviroment noise to electric signal;
Three-stage amplifier, amplifies process for carrying out three grades to the neighbourhood noise converting electric signal to;
V/F conversion module, for converting frequency signal transmission to micro controller module by amplifying the electric signal after processing;
Micro controller module, for the frequency signal output pulse frequency according to reception, and then draws noise acoustic pressure;
Code translator, compresses into row decoding for the sound drawn micro controller module analysis, and then by LED numeral method.
2. a kind of environmental noise measurement instrument based on sine-wave inverter according to claim 1, is characterized in that: described micro controller module adopts 89C51 single-chip microcomputer.
3. a kind of environmental noise measurement instrument based on sine-wave inverter according to claim 1, is characterized in that: the chip model of described V/F conversion module is LM331.
4. a kind of environmental noise measurement instrument based on sine-wave inverter according to claim 1, is characterized in that: the chip model of described three-stage amplifier is LM324.
5. a kind of environmental noise measurement instrument based on sine-wave inverter according to claim 1, is characterized in that: the chip model of described code translator is 74LS248.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510540705.7A CN105115590A (en) | 2015-08-28 | 2015-08-28 | Environmental noise measuring instrument based on sine wave inverter power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510540705.7A CN105115590A (en) | 2015-08-28 | 2015-08-28 | Environmental noise measuring instrument based on sine wave inverter power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105115590A true CN105115590A (en) | 2015-12-02 |
Family
ID=54663633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510540705.7A Pending CN105115590A (en) | 2015-08-28 | 2015-08-28 | Environmental noise measuring instrument based on sine wave inverter power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105115590A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823482A (en) * | 2016-03-24 | 2016-08-03 | 苏州合欣美电子科技有限公司 | Carrier movement track measuring system based on sine wave inverter power source |
| CN105973454A (en) * | 2016-04-28 | 2016-09-28 | 无锡昊瑜节能环保设备有限公司 | Environmental noise measuring instrument based on three-stage amplification circuit |
| CN106595845A (en) * | 2016-11-17 | 2017-04-26 | 江苏智石科技有限公司 | Industrial environmental noise monitoring system |
| CN106595844A (en) * | 2016-11-17 | 2017-04-26 | 江苏智石科技有限公司 | Wireless network-based industrial environment noise monitoring system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2916599Y (en) * | 2006-04-28 | 2007-06-27 | 杭州爱华仪器有限公司 | Digital true effective value rectifying module |
| CN102426052A (en) * | 2011-09-16 | 2012-04-25 | 重庆恩菲斯软件有限公司 | Vibration wire type data acquisition system and method |
| CN202209988U (en) * | 2011-04-21 | 2012-05-02 | 重庆大学 | Intelligent control type acoustic vibration measuring instrument |
| CN203054053U (en) * | 2012-12-07 | 2013-07-10 | 宁波大学 | Multifunctional electronic measuring instrument |
| CN103438991A (en) * | 2013-09-11 | 2013-12-11 | 哈尔滨金大环境工程有限公司 | Test method of environmental noise tester |
| CN203869772U (en) * | 2014-04-04 | 2014-10-08 | 北京智博联科技有限公司 | Wireless vibration signal acquisition instrument |
-
2015
- 2015-08-28 CN CN201510540705.7A patent/CN105115590A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2916599Y (en) * | 2006-04-28 | 2007-06-27 | 杭州爱华仪器有限公司 | Digital true effective value rectifying module |
| CN202209988U (en) * | 2011-04-21 | 2012-05-02 | 重庆大学 | Intelligent control type acoustic vibration measuring instrument |
| CN102426052A (en) * | 2011-09-16 | 2012-04-25 | 重庆恩菲斯软件有限公司 | Vibration wire type data acquisition system and method |
| CN203054053U (en) * | 2012-12-07 | 2013-07-10 | 宁波大学 | Multifunctional electronic measuring instrument |
| CN103438991A (en) * | 2013-09-11 | 2013-12-11 | 哈尔滨金大环境工程有限公司 | Test method of environmental noise tester |
| CN203869772U (en) * | 2014-04-04 | 2014-10-08 | 北京智博联科技有限公司 | Wireless vibration signal acquisition instrument |
Non-Patent Citations (1)
| Title |
|---|
| 赵有以 等: "基于STM32系列单片机的数控正弦波逆变电源设计与实现", 《电子设计工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823482A (en) * | 2016-03-24 | 2016-08-03 | 苏州合欣美电子科技有限公司 | Carrier movement track measuring system based on sine wave inverter power source |
| CN105973454A (en) * | 2016-04-28 | 2016-09-28 | 无锡昊瑜节能环保设备有限公司 | Environmental noise measuring instrument based on three-stage amplification circuit |
| CN106595845A (en) * | 2016-11-17 | 2017-04-26 | 江苏智石科技有限公司 | Industrial environmental noise monitoring system |
| CN106595844A (en) * | 2016-11-17 | 2017-04-26 | 江苏智石科技有限公司 | Wireless network-based industrial environment noise monitoring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105910699A (en) | Band pass filter based ambient noise measuring instrument | |
| CN105115590A (en) | Environmental noise measuring instrument based on sine wave inverter power supply | |
| CN100483473C (en) | Device and method for measuring DC resultant field | |
| CN105973454A (en) | Environmental noise measuring instrument based on three-stage amplification circuit | |
| CN106595844A (en) | Wireless network-based industrial environment noise monitoring system | |
| CN105157818A (en) | Portable environmental noise measuring instrument | |
| CN105157817A (en) | Environmental noise measuring instrument based on AC voltage-stabilizing power supply | |
| CN102539646A (en) | Real-time online analyzer for measuring water content in greenhouse soil | |
| CN204988498U (en) | Ambient noise measuring apparatu based on voltage regulator power | |
| CN101539602A (en) | Full-digital real-time noise measurement and analysis method and system thereof | |
| CN204988497U (en) | Ambient noise measuring apparatu based on sinusoidal wave invertion power supply | |
| CN106595845A (en) | Industrial environmental noise monitoring system | |
| CN206523222U (en) | A kind of device of environment noise monitoring | |
| CN103438991A (en) | Test method of environmental noise tester | |
| CN203376002U (en) | Indoor fresh air volume test device | |
| CN204331387U (en) | A kind of computer equipment with radio communication and measuring ability | |
| CN106248197A (en) | A kind of environment noise long distance control system | |
| CN107300415A (en) | A kind of environmental noise tester | |
| CN201594148U (en) | Environment detection device | |
| Xian-ling | The virtual Instrument based on labVIEW and Sound Card | |
| CN203732929U (en) | Energy source data acquisition terminal | |
| CN210690619U (en) | Wind speed detector | |
| CN202736476U (en) | Animal monitoring analysis system based on acoustical signal processing | |
| CN202974427U (en) | Noise monitor | |
| CN208590122U (en) | A kind of gauge table Internet of Things collector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151202 |