CN203163873U - Noise measuring device - Google Patents
Noise measuring device Download PDFInfo
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- CN203163873U CN203163873U CN 201320067901 CN201320067901U CN203163873U CN 203163873 U CN203163873 U CN 203163873U CN 201320067901 CN201320067901 CN 201320067901 CN 201320067901 U CN201320067901 U CN 201320067901U CN 203163873 U CN203163873 U CN 203163873U
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- noise
- power supply
- microphone
- microprocessor
- signal acquisition
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Abstract
The utility model discloses a noise measuring device, which comprises a signal acquisition module, a data processing display module and a power supply module, wherein the signal acquisition module comprises a microphone and a preamplifier, the microphone is used for acquiring outside noise, and the preamplifier is connected with the microphone for impedance transformation; the data processing display module comprises an A/D converter, a microprocessor and a display which are successively connected, the A/D converter is connected with the preamplifier so as to convert noise analog signals sent from the preamplifier into digital signals, and uploads the digital signals to the microprocessor through an AC_Link interface, and the display displays noise data processed by the microprocessor in real time; and the power supply module comprises a power supply and a transformer, the power supply directly supplies power for the signal acquisition module, and the power supply supplies power for the data processing display module after voltage transformation through the transformer. The noise measuring device is designed by adopting the full-digital technology, and has the advantages of simple structure, good consistency and stability, and accurate measurement.
Description
Technical field
The utility model relates to the environmental monitoring technology field, relates more specifically to a kind of noise-measuring system.
Background technology
Along with high development of social economy, the quickening of rhythm of life, the deepening continuously of growth in the living standard and environmental protection concept, people are more and more higher to environment requirement.Noise pollution, atmospheric pollution, water pollute and are called contemporary environment three and pollutes greatly.Wherein noise pollution has become a human harm greatly, and noise is a kind of invisible pollution.As far back as the first seven century in Christian era, people have just understood that noise can influence people's mood, impairs one's health, even causes death.Developing rapidly of production technology also makes the noise scope wide, very harmful being growing on and on.
Nowadays, the noise pollution problem that become international, more and more cause people's attention, a series of national standards about neighbourhood noise have also been formulated, promulgated to China recent years in succession, the enforcement of these standards, for we have proposed an important problem, be exactly how to develop, develop and to reach that respective standard requires, noise monitoring instrument easy to use.Therefore design and produce noise level indicator, detect noise, the harm of prevention noise reminds people to note controlling the sound that the individual sends automatically, conscious environment of keeping quite just seems particularly important, has also avoided embarrassment and the contradiction of unnecessary interpersonal relation in the environmental management simultaneously.
Given this, be necessary to provide a kind of noise-measuring system to alleviate the environmental problem of growing tension.
The utility model content
The purpose of this utility model provides a kind of noise-measuring system to meet the need of market.
To achieve these goals, the utility model adopts following technical scheme: a kind of noise-measuring system is provided, and it comprises signal acquisition module, data processes and displays module and supply module.Wherein, described signal acquisition module comprises microphone and prime amplifier, and described microphone is used for gathering outside noise, and described prime amplifier links to each other to carry out the impedance conversion with described microphone; Described data processes and displays module comprises A/D converter, microprocessor and the display that links to each other successively, described A/D converter links to each other to be converted to digital signal from the noise simulation signal of prime amplifier with prime amplifier, and digital signal uploaded to microprocessor by the AC_Link interface, described display shows in real time through the noise data after the microprocessor processes; Described supply module comprises power supply and transformer, and described power supply links to each other directly be the signal acquisition module power supply with signal acquisition module, and described power supply is undertaken being data processes and displays module for power supply after the voltage transitions by transformer.
Its further technical scheme is: be provided with acoustic calibrator in the described microphone.
Its further technical scheme is: it is the chip of PXA270 that described microprocessor adopts model.
Its further technical scheme is: it is the chip of UCB1400 that described A/D converter adopts model.
Its further technical scheme is: it is the touch LCD screen of TM057QDH01 that described display adopts model.
The technique effect of noise-measuring system provided by the utility model is: constituted by signal acquisition module, data processes and displays module and three circuit modules of supply module, and simple in structure, the convenient use; Use A/D converter to carry out data-switching, realize the Design of digital of circuit, improve stability and the consistance of circuit; Handle the back through the data computation of microprocessor and shown by display, measurement result is accurate.
By following description also by reference to the accompanying drawings, it is more clear that the utility model will become, and these accompanying drawings are used for explaining embodiment of the present utility model.
Description of drawings
Fig. 1 is the block diagram of the utility model noise-measuring system one embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the embodiment is clearly and completely described, similar assembly label represents similar assembly in the accompanying drawing.Obviously, below only be the utility model part embodiment with the embodiment that describes, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
With reference to Fig. 1, it has showed an embodiment of the utility model noise-measuring system.The noise-measuring system 10 of present embodiment mainly is made up of signal acquisition module 11, data processes and displays module 12 and 13 3 circuit modules of supply module.Wherein, supply module 13 comprises power supply 131 and transformer 132, described power supply 131 can adopt the Switching Power Supply of 12V, it directly is signal acquisition module 11 power supplies, simultaneously, described power supply 131 is for 12 power supplies of data processes and displays module, to realize the stability of feed circuit by transformer 132 behind the 5V with the voltage transitions of 12V.
In the present embodiment, described signal acquisition module 11 comprises microphone 111 and the prime amplifier 112 that links to each other with this microphone 111.Described microphone 111 is the transducers that acoustical signal converted to electric signal, and it is used for gathering outside noise; Prime amplifier 112 is a kind of impedance transformers, it has very high input impedance and less output impedance, because condenser microphone 111 electric capacitys are very little, internal resistance is very high, then the impedance of level weighting network can not be very high, and therefore need add prime amplifier 112 in the back of microphone 111 carries out the impedance conversion.Described signal acquisition module 11 also can comprise signal conditioner and static excitation circuit board (not shown), its major function is exactly the constant current source power supply (ICP) for microphone 111, prime amplifier 112, signal is amplified and anti-aliasing filter the output of static excitation calibration electric signal.
In the present embodiment, described data processes and displays module 12 comprises A/D converter 121, microprocessor 122, display and the peripheral communications circuit that links to each other successively.Wherein, described A/D converter 121 adopts the UCB1400 chips, it is integrated one be used for 20 stereo decoding/scramblers that audio frequency is handled, support sampling rate able to programme, I/O gain and digital sound to handle.Present embodiment links to each other to be converted to digital signal from the noise simulation signal of prime amplifier 112 with the input end of this A/D converter 121 with prime amplifier 112, its output terminal links to each other with microprocessor 122, uploads to microprocessor 122 with the digital signal after will changing by the AC_Link interface.Microprocessor 122 in the present embodiment adopts the PXA270 chip to carry out powerful data computation and analyzing and processing, and described display 123 employing models are the touch LCD screen of TM057QDH01, can realize the real-time demonstration of noise data by the Application Program Interface that VC software is developed.
In order to improve the accuracy of measurement, need equipment is calibrated, calibrating mode can be divided into acoustic calibrator calibration and recording calibration.Wherein, the needs of acoustic calibrator calibration are bought special acoustic calibrator, must take off the fan housing of microphone 111 in the time of calibration, it is enclosed within on the microphone 111 calibrates accordingly.The electrostatic actuator calibration is the function that microphone 111 has oneself, as long as give a fixing electric signal just passable, can realize automatic calibration.Present embodiment adopts the acoustic calibrator calibrating mode, an acoustic calibrator is set in microphone 111 realizes calibrating preferably effect, improves the accuracy of measuring.
As mentioned above, noise-measuring system provided by the utility model has following technique effect: constituted by signal acquisition module, data processes and displays module and three circuit modules of supply module, and simple in structure, the convenient use; Use A/D converter to carry out data-switching, realize the Design of digital of circuit, improve stability and the consistance of circuit; Handle the back through the data computation of microprocessor and shown by display, measurement result is accurate.
Abovely in conjunction with most preferred embodiment the utility model is described, but the utility model is not limited to the embodiment of above announcement, and should contains various modification, equivalent combinations of carrying out according to essence of the present utility model.
Claims (5)
1. a noise-measuring system is characterized in that, comprising:
Signal acquisition module, described signal acquisition module comprises microphone and prime amplifier, and described microphone is used for gathering outside noise, and described prime amplifier links to each other to carry out the impedance conversion with described microphone;
Data processes and displays module, described data processes and displays module comprises A/D converter, microprocessor and the display that links to each other successively, described A/D converter links to each other to be converted to digital signal from the noise simulation signal of prime amplifier with prime amplifier, and digital signal uploaded to microprocessor by the AC_Link interface, described display shows in real time through the noise data after the microprocessor processes;
Supply module, described supply module comprises power supply and transformer, and described power supply links to each other directly be the signal acquisition module power supply with signal acquisition module, and described power supply is undertaken being data processes and displays module for power supply after the voltage transitions by transformer.
2. noise-measuring system as claimed in claim 1 is characterized in that: be provided with acoustic calibrator in the described microphone.
3. noise-measuring system as claimed in claim 1 is characterized in that: it is the chip of PXA270 that described microprocessor adopts model.
4. noise-measuring system as claimed in claim 1 is characterized in that: it is the chip of UCB1400 that described A/D converter adopts model.
5. noise-measuring system as claimed in claim 1 is characterized in that: the touch LCD screen that described display employing model is TM057QDH01.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320067901 CN203163873U (en) | 2013-02-06 | 2013-02-06 | Noise measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320067901 CN203163873U (en) | 2013-02-06 | 2013-02-06 | Noise measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203163873U true CN203163873U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320067901 Expired - Fee Related CN203163873U (en) | 2013-02-06 | 2013-02-06 | Noise measuring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108631622A (en) * | 2018-05-29 | 2018-10-09 | 西南交通大学 | A kind of control system and method applied to AC-DC matrix converters |
| CN108631621A (en) * | 2018-05-28 | 2018-10-09 | 西南交通大学 | Control method, control device, output system and the storage medium of AC-DC converter |
| CN116046147A (en) * | 2023-02-22 | 2023-05-02 | 浙江省计量科学研究院 | Intelligent noise sensor |
-
2013
- 2013-02-06 CN CN 201320067901 patent/CN203163873U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108631621A (en) * | 2018-05-28 | 2018-10-09 | 西南交通大学 | Control method, control device, output system and the storage medium of AC-DC converter |
| CN108631621B (en) * | 2018-05-28 | 2019-11-08 | 西南交通大学 | Control method, control device, output system and the storage medium of AC-DC converter |
| CN108631622A (en) * | 2018-05-29 | 2018-10-09 | 西南交通大学 | A kind of control system and method applied to AC-DC matrix converters |
| CN108631622B (en) * | 2018-05-29 | 2019-08-06 | 西南交通大学 | A kind of control system and method applied to AC-DC matrix converter |
| CN116046147A (en) * | 2023-02-22 | 2023-05-02 | 浙江省计量科学研究院 | Intelligent noise sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20220206 |