CN101441080B - Device for detecting noise source direction - Google Patents
Device for detecting noise source direction Download PDFInfo
- Publication number
- CN101441080B CN101441080B CN2008102337512A CN200810233751A CN101441080B CN 101441080 B CN101441080 B CN 101441080B CN 2008102337512 A CN2008102337512 A CN 2008102337512A CN 200810233751 A CN200810233751 A CN 200810233751A CN 101441080 B CN101441080 B CN 101441080B
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- noise
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- center pillar
- noise source
- signal
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Abstract
The invention relates to a detection device capable of detecting noise source direction, which belongs to field of environment quality monitoring technology. The device includes a compass (1) arranged at an upper portion of a column, a middle column (2) arranged at middle portion of the column and a signal conditioning circuit board (8) arranged at lower portion of the column; wherein, a. sign points for recording direction when using are fixed on outer ring of the compass (1); b. a resonator (4) which is divided into 4 or 6 fan-shaped spaces by sound insulation sheets (3) is arranged between the column and the middle column (2), noise guide holes (5) are arranged on external surface of the column; small holes (6) are arranged on the middle column (2), sound sensors (7) are fixed on the small holes (6); and c. the signal conditioning circuit board (8) is connected with lead of the sound sensors (7). The invention has advantages of simple structure, noise source direction distinguishing capability, good noise measurement stability and high monitoring accuracy. The invention is especially adapted for detection of 4 or 6 noise source directions.
Description
Technical field:
The present invention relates to a kind of pick-up unit of energy detection noise Sounnd source direction, belong to the environmental quality monitoring technical field.
Background technology:
In the process that neighbourhood noise is monitored, owing to noise source is many, reflection, refraction complexity, monitoring requires inconsistent, and analysis, the evaluation of monitoring result are had any problem.Noise level indicator is measured (collection) requirement except that satisfying both at home and abroad at present, in following several respects bigger improvement is arranged: 1, high precision, and comprehensive, as measuring the noise monitoring analyser of sound decibel and frequency simultaneously.2, chronicity: as fixedly mounting the noise level indicator of long term monitoring neighbourhood noise change procedure.3, convenience: easy to carry, to measure accurately, data are reliable.Can carry out the noise monitoring analyser of 1 hour, a few hours to 24 hour.
The monitoring of noise is subjected to the noise source aspect effect bigger, must be noted that the direction of noise source during monitoring, and the measurement result of single detection method for sensing can not reflect the truth of neighbourhood noise.
By literature search, do not find the relevant open report of the noise source pick-up unit identical with technical solution of the present invention.
Summary of the invention:
The objective of the invention is to overcome the deficiency of prior art, and a kind of noise detection apparatus that can detect a plurality of noise source directions that has is provided.
A kind of noise detection apparatus that can detect 4 or 6 direction noise sources of the present invention.Forming structure is:
The noise source direction detection device by the north arrow that places cylinder top (1), place center pillar (2) in the cylinder middle part, place the signal conditioning circuit plate (8) of cylinder bottom to form; Wherein:
A. be fixed with on north arrow (1) outer shroud when measuring in order to write down the monumented point of direction;
B. be provided with between cylinder and center pillar (2) with sound insulation sheet (3) it is divided into 4 or 6 resonator cavitys (4) that sector space forms, the noise that has 4 or 6 directions on the cartridge outer surface is led hole (5); Open aperture (6) on the center pillar (2), aperture (6) is gone up with the intrinsic sound transducer of glue (7);
C. signal conditioning circuit plate (8) is connected by the lead of the aperture on the center pillar (6) with sound transducer (7).
Modulate circuit as shown in Figure 5, each road signal that is collected by different resonator cavitys inserts low-pass filter, elimination high frequency composition, synchronous signal is also smoothed.It is relatively big or small at the maximum direction signal of data selector output terminal output demonstration to send into comparator circuit again, opens analog switch simultaneously and exports this direction signal.Realize that the noise source direction detects.
The used device of this method is market and buys, north arrow (1) is SMD, electret transducer (7) can guarantee to have constant sensitivity in audio range, the relative displacement d of electret foil with adding the sound intensity be directly proportional, therefore the voltage of sensor (7) output is only relevant with the sound intensity, and and frequency-independent.Sensor (7) has wide frequency range, frequency response is straight, dynamic range is big, degree of distortion is little, highly sensitive, characteristic such as electromagnetic interference (EMI) is little, characteristics such as price is low, volume is little, thereby, in sound measurement, be used widely.Filtering circuit in the signal conditioning circuit, comparer, data selector, analog switches etc. are public technology.
That the present invention has is simple in structure, can obviously distinguish noise source direction, the good stability of noise measurement, the advantage that monitoring accuracy is high.The detection of suitable especially 4 or 6 the noise source directions of the present invention.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Accompanying drawing 2 is an assembling synoptic diagram of the present invention.
Accompanying drawing 3 is a plan structure synoptic diagram of the present invention.
Accompanying drawing 4 is a side-looking structural representation of the present invention.
Accompanying drawing 5 is a signal conditioning circuit theory diagram of the present invention.
Embodiment:
Noise source direction detection device of the present invention by the north arrow 1 that places cylinder top, place center pillar 2 in the cylinder middle part, place the signal conditioning circuit plate 8 of cylinder bottom to form; Wherein:
A. be fixed with on north arrow 1 outer shroud when measuring in order to write down the monumented point of direction;
B. 2 of cylinder and center pillars are provided with sound insulation sheet 3 it are divided into 4 or 6 resonator cavitys 4 that sector space forms, and the noise that has 4 or 6 directions on the cartridge outer surface is led hole 5; Open aperture 6 on the center pillar 2, use the intrinsic sound transducer 7 of glue on the aperture 6;
C. signal conditioning circuit plate 8 is connected by the lead of the aperture on the center pillar 6 with sound transducer 7.
During use: this pick-up unit is placed on the position that needs monitoring noise direction, and noise direction detector is placed on the below, can not have on every side and block the object that maybe can change audio direction.After the noise of pick-up unit top north arrow 1 direction and cartridge outer surface is led hole 5 relative positions, opening detecting device, the maximum direction sequence number that record shows, and this direction noise result.
Claims (1)
1. the pick-up unit of an energy detection noise Sounnd source direction is characterized in that: the noise source direction detection device by the north arrow that places cylinder top (1), place center pillar (2) in the cylinder middle part, place the signal conditioning circuit plate (8) of cylinder bottom to form; Wherein:
A. be fixed with on north arrow (1) outer shroud when measuring in order to write down the monumented point of direction;
B. be provided with between cylinder and center pillar (2) with sound insulation sheet (3) it is divided into 4 or 6 resonator cavitys (4) that sector space forms, the noise that has 4 or 6 directions on the cartridge outer surface is led hole (5); Have the aperture (6) of leading the corresponding one by one setting in hole (5) with noise on the center pillar (2), aperture (6) is gone up with the intrinsic sound transducer of glue (7);
C. signal conditioning circuit plate (8) is connected by the lead of the aperture on the center pillar (6) with sound transducer (7); Modulate circuit inserts low-pass filter by each road signal that different resonator cavitys collect, elimination high frequency composition, and synchronous signal is also smoothed; It is relatively big or small at the maximum direction signal of data selector output terminal output demonstration to send into comparator circuit again, opens analog switch simultaneously and exports this direction signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102337512A CN101441080B (en) | 2008-12-25 | 2008-12-25 | Device for detecting noise source direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102337512A CN101441080B (en) | 2008-12-25 | 2008-12-25 | Device for detecting noise source direction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101441080A CN101441080A (en) | 2009-05-27 |
| CN101441080B true CN101441080B (en) | 2010-08-11 |
Family
ID=40725616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102337512A Expired - Fee Related CN101441080B (en) | 2008-12-25 | 2008-12-25 | Device for detecting noise source direction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101441080B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI471826B (en) * | 2010-01-06 | 2015-02-01 | Fih Hong Kong Ltd | System and method for detecting sounds and sending alert messages |
| CN105136280B (en) * | 2015-09-18 | 2018-04-20 | 华晨汽车集团控股有限公司 | The system and method for single noise qualities is tested under a kind of multi-source noise circumstance |
| CN106382980A (en) * | 2016-12-02 | 2017-02-08 | 中北大学 | End surface coupling raster chip grade multi-ring waveguide chamber cascading vector high sensitivity sound sensor |
| CN106525217A (en) * | 2016-12-02 | 2017-03-22 | 中北大学 | Vertical coupling grating chip-level multi-ring waveguide cavity cascaded vector high-sensitivity acoustic sensor |
| CN109186753A (en) * | 2018-10-17 | 2019-01-11 | 广西壮族自治区环境监测中心站 | A kind of intelligent noise monitoring device and its control system |
| CN113432707B (en) * | 2021-06-24 | 2022-09-06 | 中科深兰(福建)环境科技有限责任公司 | Noise detection device convenient to carry |
-
2008
- 2008-12-25 CN CN2008102337512A patent/CN101441080B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101441080A (en) | 2009-05-27 |
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| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100811 Termination date: 20101225 |