CN212721733U - Device for measuring skid-mounted insertion loss of air blower - Google Patents
Device for measuring skid-mounted insertion loss of air blower Download PDFInfo
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- CN212721733U CN212721733U CN202021081201.6U CN202021081201U CN212721733U CN 212721733 U CN212721733 U CN 212721733U CN 202021081201 U CN202021081201 U CN 202021081201U CN 212721733 U CN212721733 U CN 212721733U
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Abstract
The utility model provides a device for measuring skid-mounted insertion loss of an air blower, which comprises a noise component and a measuring component, wherein the noise component is positioned at one side of the measuring component, and the measuring component is arranged outside the skid-mounted air blower; the noise component comprises a base, wherein a plurality of adapter plates which respectively correspond to the side walls of the skid-mounted air blower are arranged on the base, the adapter plates are all in sliding connection with the base, and noise sources are arranged on the adapter plates; the measuring component comprises a noise meter and an upright post, the noise meter is connected to one side of the upright post in a sliding mode, and scale marks are arranged on the upright post. Kind measure device of air-blower sled dress insertion loss, utilize the speaker as the substitute sound source, can not produce extra background noise at test environment, the sound composition of different frequencies is more balanced in the white noise in addition, compares in the air-blower sound source, is more rigorous to the measurement of inserting the loss.
Description
Technical Field
The utility model belongs to the noise measurement field especially relates to a measure device of air-blower sled dress insertion loss.
Background
In order to reduce the air blower noise, a manufacturer often configures integral sound insulation skid-mounted equipment for the air blower, the sound insulation effect of the skid-mounted equipment can be evaluated through the insertion loss of the skid-mounted equipment, if the air blower is used as a sound source for testing the insertion loss of the skid-mounted equipment, an exhaust pipeline needs to be installed, the huge noise generated by the exhaust pipeline can influence the measurement of the insertion loss, the noise reduction treatment can be performed on an exhaust pipe, but the effect is limited, and the noise insulation effect of the skid-mounted equipment is difficult to accurately evaluate. In addition, no corresponding auxiliary device is arranged on the market at present, so that the skid-mounted insertion loss measurement preparation and debugging work is complicated, and the measurement precision is low.
Disclosure of Invention
In view of this, the utility model aims at providing a measure air-blower sled dress insertion loss's device to reduce test environment background noise, and simplify and measure the debugging step, improve and measure work efficiency.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a device for measuring skid-mounted insertion loss of a blower comprises a noise component and a measuring component, wherein the noise component is positioned on one side of the measuring component, and the measuring component is arranged outside a skid-mounted blower;
the noise component comprises a base, wherein a plurality of adapter plates which respectively correspond to the side walls of the skid-mounted air blower are arranged on the base, the adapter plates are all in sliding connection with the base, and noise sources are arranged on the adapter plates;
the device is characterized in that the noise source is a loudspeaker, the device is also provided with a signal generator and a power amplifier, the signal generator is in signal connection with the power amplifier, and the power amplifier is in signal connection with the loudspeaker respectively;
the measuring component comprises a noise meter and an upright post, the noise meter is connected to one side of the upright post in a sliding mode, and scale marks are arranged on the upright post.
Furthermore, the base is provided with a plurality of sliding grooves which are respectively matched with the adapter plate, and the adapter plate is connected in the sliding grooves corresponding to the adapter plate in a sliding manner.
Further, the bottom of keysets all is equipped with the slider, the both sides of slider all are equipped with the mounting groove, all be equipped with locating piece and positioning spring in the mounting groove, locating piece sliding connection in the mounting groove, and the one end of locating piece with the lateral wall of spout inconsistent, positioning spring's one end is fixed in the mounting groove, and positioning spring's the other end and locating piece fixed connection.
Further, all be equipped with the handle on the locating piece, the both sides of slider all be equipped with handle assorted guide slot, the one end and the locating piece fixed connection of handle, and the other end of handle pass behind the guide slot and be located the external world.
Further, the noise meter and the noise source are located on the same horizontal plane.
Further, the distance between the noise instrument and the noise source is equal to the sum of the distance between the noise source and the corresponding side wall of the blower skid and the length of the longest edge of the blower skid.
Compared with the prior art, a measure air-blower sled dress insertion loss's device have following advantage:
(1) a measure device of air-blower sled dress insertion loss, utilize the speaker as the substitute sound source, can not produce extra background noise at test environment, the sound composition of different frequencies is more balanced in the white noise in addition, compares in the air-blower sound source, is more rigorous to the measurement of inserting the loss.
(2) A measure device of air-blower sled dress insertion loss, through the position that removes the keysets, adjust the relative position between a plurality of noise sources, simulation air-blower noise, and then quick accurate completion measurement debugging work utilizes the position that the stand that has the scale can the quick positioning noise appearance simultaneously to make it be in same horizontal plane with the noise source, guarantee measurement accuracy, improve work efficiency.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a schematic view of an apparatus according to an embodiment of the present invention for measuring bare engine noise of a blower;
FIG. 2 is a schematic diagram of the device according to the embodiment of the present invention for measuring the noise of the blower after the blower is installed in the skid-mounted interior;
fig. 3 is a schematic view of the assembly of the noise meter and the upright according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base according to an embodiment of the present invention;
fig. 5 is an assembly cross-sectional view of the adapter plate and the base according to the embodiment of the present invention.
Description of reference numerals:
1. a base; 11. an adapter plate; 111. a slider; 1111. mounting grooves; 11111. positioning blocks; 111111, a handle; 11112. a positioning spring; 1112. a guide groove; 12. a chute; 2. a noise source; 3. a noise meter; 4. a column; 41. scale lines; 5. and (6) skid-mounting.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-5, a device for measuring blower skid insertion loss includes a noise assembly located at one side of a measurement assembly provided outside a blower skid 5;
the noise component comprises a base 1, a plurality of adapter plates 11 which correspond to the side walls of the air blower skid-mounted device 5 respectively are arranged on the base 1, the adapter plates 11 are connected with the base 1 in a sliding mode, and noise sources 2 are arranged on the adapter plates 11; through the position of removing keysets 11, adjust the relative position between a plurality of noise sources, the simulation air-blower noise, and then quick accurate completion measurement debugging work improves work efficiency.
The noise source 2 is a loudspeaker, the device is also provided with a signal generator and a power amplifier, the signal generator is in signal connection with the power amplifier, and the power amplifier is in signal connection with the loudspeaker respectively; the loudspeaker is used as a substitute sound source, so that extra background noise cannot be generated in a test environment, sound components with different frequencies in white noise are balanced, and the measurement of the insertion loss is more precise compared with a blower sound source.
The measuring component comprises a noise meter 3 and a stand column 4, wherein the noise meter 3 is connected to one side of the stand column 4 in a sliding mode, and scale marks 41 are arranged on the stand column 4. The height of the noise instrument 3 is read through the scale marks 41 and is positioned on the same horizontal plane with the noise source 2, so that the measurement precision is ensured. The upright post 4 is provided with a fixing sleeve which is sleeved outside the upright post and is in sliding connection with the upright post, and the noise meter 3 is clamped in the fixing sleeve and is further in sliding connection with the upright post 4.
The base 1 is provided with a plurality of sliding grooves 12 which are respectively matched with the adapter plate 11, and the adapter plate 11 is connected in the sliding grooves 12 corresponding to the adapter plate in a sliding manner.
The bottom of keysets 11 all is equipped with slider 111, the both sides of slider 111 all are equipped with mounting groove 1111, all be equipped with locating piece 11111 and positioning spring 11112 in the mounting groove 1111, locating piece 11111 sliding connection is in mounting groove 1111, and locating piece 11111's one end with spout 12's lateral wall inconsistent, positioning spring 11112's one end is fixed in mounting groove 1111, and positioning spring 11112's the other end and locating piece 11111 fixed connection.
The positioning block 11111 is provided with handles 111111, the two sides of the slider 111 are provided with guide grooves 1112 matched with the handles 111111, one end of the handle 111111 is fixedly connected with the positioning block 11111, and the other end of the handle 111111 penetrates through the guide grooves 1112 and then is located outside. Utilize the elasticity of spring to make locating piece 11111 push up the lateral wall of spout 12, fix a position keysets 11, not only fix a position stably, still be convenient for remove keysets 11's position, improve debugging work efficiency.
When the position of the adapter plate 11 is moved, the handles 111111 on two sides of the adapter plate 11 are manually pressed simultaneously, so that the two positioning springs 11112 are compressed simultaneously, the positioning blocks 11111 retract into the mounting grooves 1111, and then the adapter plate 11 is slid according to requirements; after the adapter plate 11 slides to the designated position, the handles 111111 on the two sides are released, the positioning blocks 11111 slide outwards along the mounting grooves 1111 under the action of the elastic force of the positioning springs 11112 and push against the side walls of the sliding grooves 12, and the positioning blocks 11111 on the two sides act simultaneously to position the adapter plate 11.
The noise meter 3 and the noise source 2 are positioned on the same horizontal plane.
The distance between the noise instrument 3 and the noise source 2 is equal to the sum of the distance between the noise source and the corresponding side wall of the blower skid 5 and the length of the longest edge of the blower skid 5. The length of the longest side of the blower skid 5 is a, the distance between the noise source 2 and the corresponding side wall of the blower skid 5 is B (i.e. the distance between the blower and the side wall of the skid 5 is B), and the distance between the noise meter 3 and the noise source 2 is a + B.
The blower skid-mounted device 5 is of a rectangular structure and comprises 4 side walls, and the number of the noise sources 2 is correspondingly set to be 4. The signal generator can be a special audio generator, or a mobile phone or a computer is used for installing corresponding software to serve as a signal source (the prior art), at least white noise can be generated, the audio signal pushes the loudspeaker array to sound after power amplification, the loudspeaker array is composed of four full-frequency loudspeakers, and the adjacent loudspeakers are spaced by 90 degrees.
The model of the noise instrument is HS 6228. The model of the speaker is YD 250-8.
Before measurement, the positions of the noise sources 2 are adjusted according to the size of the air blower, so that the 4 noise sources 2 respectively correspond to the periphery of the shell of the air blower, and the noise of the air blower is simulated to be at a level close to that of the bare engine noise of the tested machine.
A measurement step:
1. turning on a signal generator and enabling the signal generator to output white noise;
2. starting a power amplifier and adjusting output power, placing a noise instrument 3 at a position 1 meter away from a loudspeaker, and monitoring the sound pressure level of the loudspeaker;
3. the longest edge of the tested skid-mounted device 5 is A, the distance from the bare blower to the vertical surface of the skid-mounted device 5 is B, and the exposed noise sound pressure level L1 of the loudspeaker is measured at the position A + B away from the loudspeaker by using the noise meter 3;
4. the method comprises the following steps of (1) arranging a loudspeaker in a skid-mounted device 5 at a position where a bare blower is arranged, enabling four loudspeakers to face four vertical surfaces of the skid-mounted device 5 respectively, starting the loudspeakers and keeping all parameter settings consistent with the step 3, enabling the direction and distance of a noise meter 3 relative to the loudspeakers to be consistent with the step 3, and measuring the noise sound pressure level L2 outside the skid-mounted device 5 by using the noise meter 3;
5. the insertion loss of the skid 5 in the direction is IL-L1-L2;
6. the above steps are repeated, and the insertion loss in the other direction of the skid 5 is measured in the same manner.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a measure device of air-blower sled dress insertion loss which characterized in that: the device comprises a noise component and a measuring component, wherein the noise component is positioned on one side of the measuring component, and the measuring component is arranged outside the skid-mounted blower;
the noise component comprises a base, wherein a plurality of adapter plates which respectively correspond to the side walls of the skid-mounted air blower are arranged on the base, the adapter plates are all in sliding connection with the base, and noise sources are arranged on the adapter plates;
the device is characterized in that the noise source is a loudspeaker, the device is also provided with a signal generator and a power amplifier, the signal generator is in signal connection with the power amplifier, and the power amplifier is in signal connection with the loudspeaker respectively;
the measuring component comprises a noise meter and an upright post, the noise meter is connected to one side of the upright post in a sliding mode, and scale marks are arranged on the upright post.
2. The device for measuring blower skid insertion loss according to claim 1, wherein: the base is provided with a plurality of sliding grooves which are respectively matched with the adapter plate, and the adapter plate is connected in the sliding grooves corresponding to the adapter plate in a sliding mode.
3. The device for measuring blower skid insertion loss according to claim 2, wherein: the bottom of keysets all is equipped with the slider, the both sides of slider all are equipped with the mounting groove, all be equipped with locating piece and positioning spring in the mounting groove, locating piece sliding connection is in the mounting groove, and the one end of locating piece with the lateral wall of spout inconsistent, positioning spring's one end is fixed in the mounting groove, and positioning spring's the other end and locating piece fixed connection.
4. A device for measuring blower skid insertion loss according to claim 3, wherein: the positioning block is provided with a handle, the two sides of the sliding block are provided with guide grooves matched with the handle, one end of the handle is fixedly connected with the positioning block, and the other end of the handle penetrates through the guide grooves and then is located outside.
5. The device for measuring blower skid insertion loss according to claim 1, wherein: the noise meter and the noise source are positioned on the same horizontal plane.
6. The device for measuring blower skid insertion loss according to claim 1, wherein: the distance between the noise instrument and the noise source is equal to the sum of the distance between the noise source and the corresponding side wall of the skid-mounted blower and the length of the longest edge of the skid-mounted blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021081201.6U CN212721733U (en) | 2020-06-12 | 2020-06-12 | Device for measuring skid-mounted insertion loss of air blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021081201.6U CN212721733U (en) | 2020-06-12 | 2020-06-12 | Device for measuring skid-mounted insertion loss of air blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212721733U true CN212721733U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021081201.6U Active CN212721733U (en) | 2020-06-12 | 2020-06-12 | Device for measuring skid-mounted insertion loss of air blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212721733U (en) |
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- 2020-06-12 CN CN202021081201.6U patent/CN212721733U/en active Active
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