CN215178129U - Auxiliary positioning device for calibrating and calibrating noise measuring instrument - Google Patents
Auxiliary positioning device for calibrating and calibrating noise measuring instrument Download PDFInfo
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- CN215178129U CN215178129U CN202120574742.0U CN202120574742U CN215178129U CN 215178129 U CN215178129 U CN 215178129U CN 202120574742 U CN202120574742 U CN 202120574742U CN 215178129 U CN215178129 U CN 215178129U
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Abstract
The utility model provides an auxiliary positioning device for noise measuring instrument examination and calibration, this auxiliary positioning device includes: the device comprises a silencing box, a sound source support arranged in the silencing box, a sound source above the sound source support, a base arranged in the silencing box, a support rod vertically arranged above the base and a fixed disk of the measured instrument connected above the support rod; a side light source is arranged on the inner side surface of the silencing box; a top light source is arranged on the inner top surface of the silencing box; the intersection point of the laser emitted by the side light source and the top light source is positioned at the reference position of the microphone; through adjusting the position of side light source and top light source, the crossing point of the laser that it sent makes the reference position of microphone visual, only needs to adjust the height of liftable branch and the anchor clamps position on the appearance fixed disk of being surveyed, can guarantee that laboratory standard microphone or the appearance microphone of being surveyed is fixed in reference position department to guarantee that measuring result is accurate, and the supporting instrument anchor clamps that use can make the staff needn't worry in the detection by the measuring appearance falls and cause the damage.
Description
Technical Field
The utility model relates to a noise measuring instrument examines and determine technical field, especially relates to an auxiliary positioning device that is used for noise measuring instrument to examine and determine and calibrate.
Background
Noise measuring instruments such as sound level meters and noise statistical analyzers are widely used in the field of environmental monitoring, etc., wherein the sound level meters are further included in the national certified meter catalogue. The frequency weighting is an important index for measuring the performance of each noise measuring instrument. JJG 188-. Taking JJG 188-2017 as an example, the specification requires: the instrument has at least one authority to perform acoustic signal experiments, and for frequencies above 500Hz, acoustic signal verification should be performed in a free sound field. It should be noted that, when the tested instrument is used to replace the standard laboratory microphone, the reference point of the microphone on the tested instrument should be the same as the reference point of the original standard laboratory microphone. In the actual operation process, most of the verification personnel can hardly make the positions of the two identical. The position of the microphone of the measured instrument is not coincident with the position of the standard microphone in the laboratory, and corresponding measurement uncertainty components are introduced to influence the accuracy and reliability of the measurement result.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that exists among the prior art, provided an auxiliary positioning device for noise measurement instrument examination and calibration.
The reference position of the microphone described in this patent refers to a position defined on or near the microphone to account for the position of the microphone, which may be at the center of the microphone diaphragm.
An aid-positioning device for verification and calibration of a noise measurement instrument, comprising: the device comprises a silencing box, a sound source support arranged in the silencing box, a sound source above the sound source support, a base arranged in the silencing box, a support rod vertically arranged above the base and a fixed disk of the measured instrument connected above the support rod; a side light source is arranged on the inner side surface of the silencing box; a top light source is arranged on the inner top surface of the silencing box; the intersection point of the laser emitted by the side light source and the top light source is positioned at the reference position of the microphone; the reference positions of the standard microphone and the microphone of the instrument to be measured in the laboratory can be ensured to be the same only by adjusting the position of the microphone to enable the intersection point of the laser emitted by the side light source and the top light source to fall on the reference position of the microphone, so that the accuracy and reliability of the measurement result are ensured.
Furthermore, in order to adjust the height of the supporting rod, the height of the measured instrument in the vertical direction is controlled, and the supporting rod is of a lifting structure.
Furthermore, in order to fix the measured instrument, the measured instrument fixing disc is also connected with a measured instrument clamp.
Further, in order to clamping the measured instrument, the measured instrument clamp comprises: the telescopic clamping jaw is connected with the lower part of the telescopic clamping jaw; the two sides of the telescopic clamping jaw can be stretched outwards or contracted inwards for clamping.
Furthermore, in order to adjust the distance between the measured instrument and the sound source, a sliding groove is formed in the middle of a fixed disc of the measured instrument, and the thin rod can slide in the sliding groove.
Further, in order to fix the position of the tested instrument clamp on the tested instrument fixing disc, a fixing device for fixing the tested instrument clamp on the sliding groove is arranged below the thin rod.
Further, for the convenience of fixing, the fixing device is a bolt.
Furthermore, in order to measure the distance, laser emitted by the side light source is perpendicular to one surface, in which the side light source is arranged, of the muffling box; the laser emitted by the top light source is vertical to the surface of the muffling box in which the top light source is arranged.
The technical effects of the utility model reside in that: an aided positioning apparatus for verification and calibration of a noise measurement instrument, comprising: the device comprises a silencing box, a sound source support arranged in the silencing box, a sound source above the sound source support, a base arranged in the silencing box, a support rod vertically arranged above the base and a fixed disk of the measured instrument connected above the support rod; a side light source is arranged on the inner side surface of the silencing box; a top light source is arranged on the inner top surface of the silencing box; the intersection point of the laser emitted by the side light source and the top light source is positioned at the reference position of the microphone; the reference position of the microphone is visualized by adjusting the positions of the side light source and the top light source and the intersection point of laser emitted by the side light source and the top light source, and the microphone of a laboratory standard microphone or a tested instrument can be fixed at the reference position only by adjusting the height of the lifting support rod and the position of the clamp on the fixed disk of the tested instrument, so that the accuracy of a measuring result is ensured; the auxiliary positioning device can relatively and accurately fix the relative position of the microphone from a sound source, and an instrument clamp used in a matched mode can enable a worker to be free from worrying about damage caused by falling of a measured instrument in detection. The laser light source is relatively easy to install, so that various silencing boxes can be conveniently added and transformed, and the application scenes are greatly widened.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a top view of the fixed plate of the measuring instrument of the present invention;
FIG. 3 is a schematic structural view of the fixture of the present invention;
FIG. 4 is a rear view of the storage silo of the present invention;
in the figure: 1. the device comprises a silencing box, 1-1 side light source, 1-2 top light source, 2 sound source, 2-1 sound source support, 3 base, 3-1 supporting rod, 3-2 measured instrument fixing disc, 3-2-1 sliding groove, 4 measured instrument clamp, 4-1 telescopic clamping jaw, 4-2 thin rod and 4-3 fixing device.
Detailed Description
The following describes embodiments of the present invention with reference to fig. 1 to 4.
An aided positioning apparatus for verification and calibration of a noise measurement instrument, comprising: the device comprises a silencing box 1, a sound source support 2-1 arranged in the silencing box 1, a sound source 2 above the sound source support 2-1, a base 3 arranged in the silencing box 1, a support rod 3-1 vertically arranged above the base 3, and a fixed disk 3-2 of a tested instrument connected above the support rod 3-1; a side light source 1-1 is arranged on the inner side surface of the silencing box 1; a top light source 1-2 is arranged on the inner top surface of the silencing box 1; the intersection point of the laser emitted by the side light source 1-1 and the top light source 1-2 is positioned at the reference position of the microphone; the laser emitted by the side light source 1-1 is vertical to one surface of the muffling box 1, in which the side light source 1-1 is arranged; the laser emitted by the top light source 1-2 is vertical to one surface of the muffling box 1 in which the top light source 1-2 is arranged; the supporting rod 3-1 is a lifting structure; the tested instrument fixing disc 3-2 is also connected with a tested instrument clamp 4; the measured instrument holder 4 includes: a thin rod 4-2 is connected below the telescopic clamping jaw 4-1 and the telescopic clamping jaw 4-1; the two sides of the telescopic clamping jaw 4-1 can be stretched outwards or contracted inwards for clamping; a sliding groove 3-2-1 is formed in the middle of the fixed disc 3-2 of the measured instrument, and the thin rod 4-2 can slide in the sliding groove 3-2-1; a fixing device for fixing the tested instrument clamp 4 on the chute 3-2-1 is arranged below the thin rod 4-2; the fixing device 4-3 is a bolt.
The working principle is as follows: a is the position of the top light source 1-2, B is the position of the side light source 1-1, D is the central position of the sound source 2, and as shown in FIG. 4, the positions of the top light source 1-2 and the side light source 1-1 are adjusted to ensure that the light rays AC and BC emitted by the top light source 1-2 and the side light source 1-1 intersect at the point C, the distance from the point C to the inner bottom of the anechoic box 1 is equal to the distance from the center D of the sound source 2 to the inner bottom of the anechoic box 1, and the distance from the surface of the light source B to the central position D of the sound source 2 and the distance from the light source B to the intersection point C of the light rays are equal. Therefore, the standard microphone in a laboratory or the microphone of the instrument to be measured can be fixed at the point C only by adjusting the height of the lifting support rod 3-1 and the position of the instrument to be measured clamp 4 on the instrument to be measured fixing disc 3-2 and clamping the instrument to be measured through inward contraction of the telescopic clamping jaw 4-1, so that the accuracy of a measuring result is ensured.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not make the essential desulfurization of the corresponding technical solutions within the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An aid-positioning device for verification and calibration of a noise measurement instrument, comprising: the device comprises a silencing box (1), a sound source support (2-1) arranged in the silencing box (1), a sound source (2) above the sound source support (2-1), a base (3) arranged in the silencing box (1), a support rod (3-1) vertically arranged above the base (3), and a fixed plate (3-2) of a measured instrument connected above the support rod (3-1);
the method is characterized in that: a side light source (1-1) is arranged on the inner side surface of the silencing box (1);
a top light source (1-2) is arranged on the inner top surface of the silencing box (1);
the intersection point of the laser emitted by the side light source (1-1) and the laser emitted by the top light source (1-2) is positioned at the reference position of the microphone.
2. An auxiliary positioning device for verification and calibration of a noise measuring instrument according to claim 1, characterized in that the supporting rod (3-1) is a liftable structure.
3. The auxiliary positioning device for calibrating and calibrating the noise measuring instrument as claimed in claim 1, wherein the instrument-under-test fixture (4) is further connected to the instrument-under-test fixture disk (3-2).
4. Auxiliary positioning device for verification and calibration of noise measuring instruments according to claim 3, characterized in that the instrument holder under test (4) comprises: a telescopic clamping jaw (4-1) and a thin rod (4-2) connected below the telescopic clamping jaw (4-1); the two sides of the telescopic clamping jaw (4-1) can be stretched outwards or contracted inwards for clamping.
5. An auxiliary positioning device for verification and calibration of a noise measuring instrument according to claim 4, characterized in that the fixed plate (3-2) of the measured instrument is provided with a sliding groove (3-2-1) in the middle, and the thin rod (4-2) can slide in the sliding groove (3-2-1).
6. Auxiliary positioning device for verification and calibration of noise measuring instruments according to claim 5, characterized in that fixing devices for fixing the measured instrument clamp (4) on the sliding chute (3-2-1) are arranged below the thin rod (4-2).
7. Auxiliary positioning device for verification and calibration of noise measuring instruments according to claim 6, characterized in that the fixing means (4-3) are bolts.
8. The auxiliary positioning device for calibrating and calibrating the noise measuring instrument according to claim 1, wherein the laser emitted by the side light source (1-1) is perpendicular to the surface of the anechoic box (1) in which the side light source (1-1) is arranged; the laser emitted by the top light source (1-2) is vertical to one surface of the muffling box (1) in which the top light source (1-2) is arranged.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120574742.0U CN215178129U (en) | 2021-03-22 | 2021-03-22 | Auxiliary positioning device for calibrating and calibrating noise measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120574742.0U CN215178129U (en) | 2021-03-22 | 2021-03-22 | Auxiliary positioning device for calibrating and calibrating noise measuring instrument |
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| CN215178129U true CN215178129U (en) | 2021-12-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115855237A (en) * | 2023-01-03 | 2023-03-28 | 杭州爱华仪器有限公司 | Microphone fault automatic identification system based on sound level meter |
| CN117596536A (en) * | 2024-01-18 | 2024-02-23 | 杭州爱华仪器有限公司 | Device and method for switching incident angle during microphone frequency weighting test |
-
2021
- 2021-03-22 CN CN202120574742.0U patent/CN215178129U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115855237A (en) * | 2023-01-03 | 2023-03-28 | 杭州爱华仪器有限公司 | Microphone fault automatic identification system based on sound level meter |
| CN117596536A (en) * | 2024-01-18 | 2024-02-23 | 杭州爱华仪器有限公司 | Device and method for switching incident angle during microphone frequency weighting test |
| CN117596536B (en) * | 2024-01-18 | 2024-04-09 | 杭州爱华仪器有限公司 | Device and method for switching incident angle during microphone frequency weighting test |
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