CN211527601U - Low-frequency band noise detector - Google Patents
Low-frequency band noise detector Download PDFInfo
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- CN211527601U CN211527601U CN202020273507.5U CN202020273507U CN211527601U CN 211527601 U CN211527601 U CN 211527601U CN 202020273507 U CN202020273507 U CN 202020273507U CN 211527601 U CN211527601 U CN 211527601U
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- extension rod
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- noise detector
- band noise
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Abstract
The utility model belongs to the technical field of the noise detection, specifically disclose a low frequency band noise detector, including casing, display, control panel subassembly be equipped with the display on the housing surface, the display lower part is equipped with control button, the casing top is equipped with the extension rod, the terminal swivelling joint of extension rod has the measuring stick, rotate and be equipped with angle sensor between the two through power device between extension rod and the measuring stick, the measuring stick both ends respectively are equipped with a microphone, the microphone with sound wave amplifier, sound wave processor, control panel subassembly in the casing pass through wire electric connection, the utility model discloses, through the contrast of the sound wave waveform that two microphones received, can be in time fix a position the sound source when detecting the noise size, have easy operation, the audio-visual advantage of data.
Description
Technical Field
The utility model belongs to the technical field of the noise detection, concretely relates to low band noise detector.
Background
Low-frequency noise is sound having a frequency of 200 hz (octave) or less. All noises can cause harm to human bodies, although the direct influence of low-frequency noises on physiology is not obvious as high-frequency noises, and the low-frequency noises can have long-term influence on human health.
The noise frequency recognizable by human ears is generally 16-20000 hertz, and in a noisy human ear, the noise is not very sensitive to low-frequency sound, and the existing noise detector generally only detects the size of the noise and rarely further confirms the source of the noise.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem be: the existing noise detector can not detect and position low-frequency noise quickly, and provides a low-frequency band noise detector which can detect the noise size and position a sound source in time.
The utility model discloses a following technical scheme realizes, a low band noise detector, including casing, display, control panel subassembly be equipped with the display on the casing surface, the display lower part is equipped with control button, the casing top is equipped with the extension rod, the terminal swivelling joint of extension rod has the measuring stick, rotate and be equipped with angle sensor between the two through power device between extension rod and the measuring stick, the measuring stick both ends respectively are equipped with a microphone, the microphone with sound wave amplifier, sound wave processor, the control panel subassembly in the casing pass through wire electric connection.
Further, in order to improve the sensitivity of the device, the microphone is connected with the measuring rod in a sliding mode, the microphone is fixed on a sliding block, and the sliding block can slide in a sliding groove in the measuring rod.
Further, in order to increase the portability of the device, the measuring rod is a three-section foldable rod, and the measuring rod is connected with the rotating center through a hinge and can be folded towards the direction of the extension rod.
Further, in order to reduce the influence of wind noise on the detection result, a spherical windshield is sleeved on the microphone.
Further, in order to reduce the influence of wind noise on the detection result, the spherical windshield is made of porous urethane foam.
Further, for audio display sound source direction more directly perceived, the extension rod end is equipped with the laser lamp, the laser direction with the extension rod is directional unanimous, and when the extension rod pointed the sound source, the laser lamp can twinkle.
The utility model has the advantages that:
1. the utility model discloses be equipped with two microphones at the both ends of rotatable measuring stick, the measuring stick is slowly rotatory, and two microphones are because different with the sound source distance, and two sound wave forms that record have time delay, send the sound wave that records for the sound wave treater, measure the maximum time and the shortest time of two wave form deviations, simultaneously through angle sensor record angular position, just can calculate the position of sound source, the utility model discloses can detect the size of noise and judge the position of sound source simultaneously fast.
2. The utility model discloses rotatory according to the display suggestion direction when the device, when the directional sound source position of extension rod, the laser lamp is controlled by the control panel subassembly, begins to flicker, the utility model discloses can react the position of sound source fast directly perceivedly.
Drawings
Fig. 1 is a schematic structural diagram (in an expanded state) of a low-frequency band noise detector according to the present invention;
fig. 2 is a schematic structural diagram (folded state) of a low-frequency band noise detector according to the present invention;
fig. 3 is a schematic connection diagram of a low-frequency band noise detector according to the present invention;
fig. 4 is a schematic diagram of the detection operation of the low-frequency noise detector of the present invention.
In the figure: 1, a shell; 2, a display; 3 controlling the plate assembly; 4 control buttons; 5, extending rods; 51 a laser light; 6, measuring a rod; 61 a power device; 62 an angle sensor; 63 a microphone; 64 sliding blocks; 65 chute; 66 a windshield; 7, a sound wave amplifier; 8 sound wave processor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 to 4, a low-frequency band noise detector includes a housing 1, a display 2, a control panel assembly 3, the display 2 is disposed on the surface of the housing 1, a control button 4 is disposed on the lower portion of the display 2, an extension rod 5 is disposed on the top end of the housing 1, the end of the extension rod 5 is rotatably connected to a measuring rod 6, the extension rod 5 and the measuring rod 6 rotate via a power device 61, an angle sensor 62 is disposed between the extension rod 5 and the measuring rod 6, two ends of the measuring rod 6 are respectively provided with a microphone 63, and the microphone 63 is electrically connected to an acoustic wave amplifier 7, an acoustic wave processor 8 and the control panel assembly 3 in the housing 1 via wires.
In practical applications, in order to improve the sensitivity of the device, the microphone 63 is slidably connected to the measuring rod 6, and the microphone 63 is fixed on a sliding block 64, and the sliding block 64 can slide in a sliding groove 65 on the measuring rod 6.
In practical application, in order to increase the portability of the device, the measuring rod 6 is a three-section foldable rod, and the measuring rod 6 is hinged at a position away from the rotation center and can be folded towards the direction of the extension rod 5.
In practical application, in order to reduce the influence of wind noise on the detection result, the microphone 63 is sleeved with a spherical windshield 66.
In practical applications, the spherical windshield 66 is made of a porous urethane foam in order to reduce the influence of wind noise on the detection result.
In practical application, for more audio-visual demonstration sound source direction, extension rod 5 end is equipped with laser lamp 51, the laser direction with extension rod 5 is directional unanimous, and when extension rod 5 directional sound source, laser lamp 51 can twinkle.
The utility model discloses a theory of operation:
the utility model is provided with two microphones at two ends of a rotatable measuring rod 6, the measuring rod 6 rotates slowly, the two microphones 63 can calculate the position of the sound source because of different distances from the sound source, the two measured sound wave forms are delayed in time, the measured sound waves are sent to a sound wave processor 8, the maximum time and the minimum time of two wave form deviations are measured, as shown in figure 4, the three states of the measuring rod 6 during rotation are shown, the left side is a common state, the middle part is a state that the measuring rod 6 points to the sound source, the right side is a state that the measuring rod 6 is vertical to the sound waves, the two wave form time difference values measured in the middle state are the largest, the right side state time difference value is the smallest, the left side is between the two microphones, the control panel component 3 can comprehensively calculate each state, the position of the sound source can be obtained, the sound intensity can be measured and displayed on a display 2 at, when the device is rotatory according to 2 suggestion directions of display, when the directional sound source position of extension rod 5, laser lamp 51 begins to twinkle, the utility model discloses can react the position of sound source fast directly perceivedly.
To sum up, the utility model discloses can in time fix a position the sound source when detecting the noise size, have easy operation, the audio-visual advantage of data.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the present invention is to provide a person skilled in the art with the ability to understand the contents of the present invention and implement the same, and not to limit the scope of the present invention.
Claims (6)
1. A low band noise detector, characterized by: including casing (1), display (2), control panel subassembly (3) casing (1) is equipped with display (2) on the surface, display (2) lower part is equipped with control button (4), casing (1) top is equipped with extension rod (5), extension rod (5) end swivelling joint has measuring stick (6), rotate and be equipped with angle sensor (62) between the two through power device (61) between extension rod (5) and measuring stick (6), measuring stick (6) both ends respectively are equipped with one microphone (63), microphone (63) with sound wave amplifier (7), sound wave treater (8), control panel subassembly (3) in casing (1) pass through wire electric connection.
2. A low band noise detector according to claim 1, wherein: the microphone (63) is connected with the measuring rod (6) in a sliding mode, the microphone (63) is fixed on a sliding block (64), and the sliding block (64) can slide in a sliding groove (65) in the measuring rod (6).
3. A low band noise detector according to claim 1, wherein: the measuring rod (6) is a three-section type foldable rod, and the measuring rod (6) is connected with the rotating center at a distance through a hinge and can be folded towards the direction of the extension rod (5).
4. A low band noise detector according to claim 1, wherein: the microphone (63) is sleeved with a spherical windshield (66).
5. A low band noise detector according to claim 4, wherein: the spherical windshield (66) is made of a porous urethane foam.
6. A low band noise detector according to claim 1, wherein: the tail end of the extension rod (5) is provided with a laser lamp (51), and the laser direction is consistent with the direction of the extension rod (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020273507.5U CN211527601U (en) | 2020-03-08 | 2020-03-08 | Low-frequency band noise detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020273507.5U CN211527601U (en) | 2020-03-08 | 2020-03-08 | Low-frequency band noise detector |
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| Publication Number | Publication Date |
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| CN211527601U true CN211527601U (en) | 2020-09-18 |
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| CN202020273507.5U Active CN211527601U (en) | 2020-03-08 | 2020-03-08 | Low-frequency band noise detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113759314A (en) * | 2021-09-01 | 2021-12-07 | 浙江讯飞智能科技有限公司 | Sound source visualization method, device and system and computer readable storage medium |
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2020
- 2020-03-08 CN CN202020273507.5U patent/CN211527601U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113759314A (en) * | 2021-09-01 | 2021-12-07 | 浙江讯飞智能科技有限公司 | Sound source visualization method, device and system and computer readable storage medium |
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