CN106644054B - Near field noise scanning testing device - Google Patents
Near field noise scanning testing device Download PDFInfo
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- CN106644054B CN106644054B CN201611238573.3A CN201611238573A CN106644054B CN 106644054 B CN106644054 B CN 106644054B CN 201611238573 A CN201611238573 A CN 201611238573A CN 106644054 B CN106644054 B CN 106644054B
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- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 230000033001 locomotion Effects 0.000 claims abstract description 133
- 239000000523 sample Substances 0.000 claims abstract description 48
- 230000007246 mechanism Effects 0.000 claims description 32
- 238000006073 displacement reaction Methods 0.000 claims description 22
- 238000009434 installation Methods 0.000 claims description 7
- 239000011358 absorbing material Substances 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a near-field noise scanning testing device, and belongs to the technical field of noise detection. The device comprises a base, a first linear motion member, a second linear motion member, a third linear motion member and a fixing structure for fixing the sound velocity probe; the third linear motion member is arranged on the base, the first linear motion member and the second linear motion member are respectively connected with the second linear motion member and the third linear motion member in a sliding manner, and the three linear motion members are mutually perpendicular in pairs; the fixed structure is connected with the first linear motion component in a sliding way. Therefore, when the device moves on the surface of the tested piece, the consistency of the moving speed and the distance can be ensured, the accuracy of the test result is improved, the problem of potential safety hazard of the traditional hand-held mode to the tested person is avoided, and meanwhile, compared with an industrial mechanical arm, the device is convenient to operate and easy to control.
Description
Technical Field
The invention relates to the technical field of noise detection, in particular to a near-field noise scanning test device.
Background
For noise testing of motors, engines or other equipment which needs a large test bench to operate, because the test bench and the like have larger sound than the tested piece, near-field noise scanning can be adopted for testing, the near-field noise scanning testing refers to scanning on a testing surface which is a certain distance away from the tested piece by using a sound velocity probe to obtain a noise distribution diagram on the surface of the tested piece, and the position of a noise source is determined through the noise distribution diagram, so that the noise problem of the tested piece is analyzed and solved.
Referring to fig. 1, when the near-field noise of the object to be measured is measured by using the sound velocity probe, if the noise distribution on one surface needs to be scanned, the scanning is required to be performed on a scanning surface 2 which is a certain distance away from the object to be measured 1; in the prior art, for near-field noise scanning test, a tester generally holds a sound velocity probe to scan, and an industrial mechanical arm can also hold the sound velocity probe to scan.
In the mode of the prior art, when a tester holds the sound velocity probe to scan, the accuracy and consistency of the test distance and the moving speed of the sound velocity probe on the surface of the tested piece cannot be ensured by a human hand, so that the error of a test result is larger, and when the tester holds the sound velocity probe close to the tested piece such as a motor, an engine and the like, the personal safety of the tester is greatly hidden trouble; on the other hand, because the sound velocity probe is very light and handy, the problem that the test cost is wasted, the control is complex, the movement is difficult and the like can be caused by the clamping mode of the industrial mechanical arm.
Disclosure of Invention
In order to improve accuracy of near field scanning test and reduce errors of test results, and meanwhile, in order to simplify operation and improve operation safety, the embodiment of the invention provides a near field noise scanning test device. The technical scheme is as follows:
in a first aspect, a near field noise scan test apparatus is provided, the apparatus comprising a base, a first linear motion member, a second linear motion member, a third linear motion member, and a fixed structure for fixing a sonic probe;
the third linear motion member is arranged on the base, the first linear motion member is in sliding connection with the second linear motion member, and the second linear motion member is in sliding connection with the third linear motion member, and the first linear motion member, the second linear motion member and the third linear motion member are perpendicular to each other;
the fixed structure is slidably connected with the first linear motion member.
With reference to the first aspect, in a first possible implementation manner, the apparatus further includes a first driving mechanism for driving the fixed structure to slide on the first linear motion member, a second driving mechanism for driving the first linear motion member to slide on the second linear motion member, and a third driving mechanism for driving the second linear motion member to slide on the third linear motion member.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, the first driving mechanism, the second driving mechanism, and the third driving mechanism respectively include a motor.
With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner, the first linear motion member, the second linear motion member, and the third linear motion member are at least one of a ball screw mechanism or a rack and pinion mating structure or a chain transmission structure.
With reference to any one of the first aspect to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, the device further includes a first slider, the first linear motion member includes a first slide rail, and the fixed structure is slidably connected to the first slide rail through the first slider;
the second linear motion member comprises a second slide rail, and the device further comprises a second sliding block arranged between the first slide rail and the second slide rail; the first sliding rail is connected with the second sliding rail in a sliding way through the second sliding block;
the third linear motion member comprises a third slide rail, and the device further comprises a third slide block arranged between the second slide rail and the third slide rail; the second sliding rail is connected with the third sliding rail in a sliding manner through the third sliding block.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the first sliding rail is detachably connected to the second sliding block, and the second sliding rail is detachably connected to the third sliding block.
With reference to any one of the third possible implementation manners of the first aspect, in a sixth possible implementation manner, the fixing structure includes a clamping structure, where the clamping structure is used to clamp the sonic probe.
With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, a portion of the clamping structure, which is in contact with the sonic probe, is a structure made of a sound absorbing material.
With reference to any one of the third possible implementation manners of the first aspect, in an eighth possible implementation manner, the device further includes a displacement sensor, where a mounting position of the displacement sensor corresponds to a mounting position of the sound velocity probe; preferably, the displacement sensor is mounted on the first slider.
With reference to any one of the third possible implementation manners of the first aspect to the first aspect, in a ninth possible implementation manner, the base is provided with a sliding wheel for moving the base and a locking structure for locking the sliding wheel; preferably, the third linear motion member is detachably mounted on the base.
The technical scheme provided by the embodiment of the invention has the beneficial effects that: according to the device provided by the invention, as the first linear motion member and the second linear motion member as well as the second linear motion member and the third linear motion member of the device are respectively and slidably connected, and the three linear motion members are mutually perpendicular, a motion structure with x, y and z axes is formed, the fixed structure is slidably connected with the first linear motion member, and the fixed structure is used for fixing the sound velocity probe, so that the sound velocity probe can move along the axis of the first linear motion member, namely along the x axis, the sound velocity probe can move along the y axis due to the sliding connection between the first linear motion member and the second linear motion member, the sound velocity probe can move along the z axis due to the sliding connection between the second linear motion member and the third linear motion member, and thus noise scanning test can be carried out on all directions of a tested piece through the device, the sound velocity probe can be fixed in the measuring process, thereby the consistency of the moving speed and the distance can be ensured, the accuracy of a test result is improved, the sound velocity is convenient to operate, the sound velocity probe is easy to control, and the problem that the sound velocity is not influenced by the fact that a person is not in the hand-held by the conventional hand-held test mode, and the problem of the sound velocity is not always caused by the fact that the human hand is not has a high-held velocity is caused by the problem of the movement of the test result; in addition, the device avoids the problems of equipment waste, high cost, difficult movement and complex control caused by clamping the sound velocity probe by the industrial mechanical arm.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a sound velocity probe scanning near field noise of a measured piece according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the overall structure of a near field noise scanning test device according to an embodiment of the present invention;
FIG. 3 is a schematic view of a linear motion member according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a part of a structure of a near field noise scan test device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a detachable connection according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a clamping structure provided by an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an installation position of a displacement sensor according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
An embodiment of the present invention provides a near field noise scan test device, referring to fig. 2, the device includes a base 40, a first linear motion member 10, a second linear motion member 20, a third linear motion member 30, and a fixing structure 60 for fixing a sound velocity probe 50;
the third linear motion member 30 is mounted on the base 40, the first linear motion member 10 and the second linear motion member 20, and the second linear motion member 20 and the third linear motion member 30 are slidably connected, and the first linear motion member 10, the second linear motion member 20, and the third linear motion member 30 are perpendicular to each other;
the fixed structure 60 is slidably coupled to the first linear motion member 10.
The three linear motion components are perpendicular to each other in pairs, so that the three linear motion components form a motion structure with x, y and z axes, and the three linear motion components are connected in a sliding mode, so that the sound velocity probe can move along the x, y and z axes in space, and noise scanning tests can be carried out on all directions of a tested piece through the device.
Further, the apparatus further includes a first driving mechanism for driving the fixed structure 60 to slide on the first rectilinear motion member 10, a second driving mechanism for driving the first rectilinear motion member 10 to slide on the second rectilinear motion member 20, and a third driving mechanism for driving the second rectilinear motion member 20 to slide on the third rectilinear motion member 30. Alternatively, the first, second and third drive mechanisms may each include a motor 70.
Specifically, if the first driving mechanism, the second driving mechanism and the third driving mechanism may include the motors 70, respectively, each motor is located at one side of the corresponding linear motion member sliding rail, and the shaft of each motor is connected with the corresponding linear motion member;
wherein, the motor can be controlled by the motor controller to make the motor output corresponding measurement parameters; the measurement parameters may include rotational angle and rotational speed to enable a sonic probe passing through the device to test near field noise of the test piece at a distance and speed.
Further, the first linear motion member 10, the second linear motion member 20, and the third linear motion member 30 are at least one of a ball screw mechanism or a rack and pinion engagement structure or a chain transmission structure.
Illustratively, referring to fig. 3, which illustrates the first linear motion member 10, a schematic structural diagram may be provided when the linear motion member is a ball screw mechanism and includes a motor 70; as shown in fig. 3, the motor 70 is fixed on one side of the ball screw mechanism, the shaft of the motor is connected with the ball screw mechanism through a key, or can be connected through other modes, the motor can be controlled by a special motor controller, the motor controller can output current signals to the motor according to testing requirements (such as required rotation angle and rotation speed), the motor shaft is controlled to output corresponding rotation angle and rotation speed, the motor shaft is connected with the ball screw, the ball screw can be driven to rotate, and the sliding block can move along the linear guide rail according to the designated speed and distance, so that near-field noise of a tested piece can be tested.
Alternatively, the first linear motion member, the second linear motion member, and the third linear motion member may be hydraulic sliding cylinder mechanisms, and when the linear motion members are hydraulic sliding cylinder structures, the corresponding driving mechanisms may also be driving mechanisms corresponding to the hydraulic sliding cylinder mechanisms, such as hydraulic cylinders, hydraulic circuits, and the like.
In addition, the linear motion member may be any other linear motion member capable of achieving similar functions, which is not limited in this embodiment, and is within the scope of the present invention.
Further, referring to fig. 4, the apparatus further includes a first slider 11, the first linear motion member 10 includes a first slide rail 12, and the fixing structure 60 is slidably connected to the first slide rail 12 through the first slider 11; specifically, the fixing mechanism 60 may be fixed below the first slider 11, and the fixing mechanism 60 is driven to slide on the first slide rail by sliding connection between the first slider 11 and the first slide rail 12, where it should be noted that the fixing structure 60 is shown in fig. 2 and fig. 4 to be fixed on the first slider 11, and the fixing structure 60 is not shown in fig. 2 and fig. 3;
the second linear motion member 20 includes a second slide rail 21, and the apparatus further includes a second slider 22 disposed between the first slide rail 12 and the second slide rail 21; the first slide rail 12 is slidably connected with the second slide rail 21 through the second slide block 22;
the third linear motion member 30 includes a third slide rail 31, and the apparatus further includes a third slider 32 disposed between the second slide rail 21 and the third slide rail 31; the second slide rail 21 is slidably connected to the third slide rail 31 through the third slider 32.
Wherein the fixed structure 60 and the first linear motion member 10 may be slidably connected by the first slider 11; the fixed structure 60 may also be directly slidably connected to the first linear motion member 10, such as a structure configured to be slidably connected where the fixed structure 60 contacts the first sliding rail 12, and the fixed structure 60 may also be slidably connected to the first linear motion member by other manners, which is not limited in the embodiment of the present invention.
Wherein the first slide rail 12 of the first linear motion member 10 is not shown in fig. 2 and 4.
Further, the first slide rail 12 is detachably connected to the second slide block 22, and the second slide rail 21 is detachably connected to the third slide block 32. Specifically, taking the detachable connection between the first sliding rail 12 and the second sliding block 22 as an example, the detachable connection structure may be as shown in fig. 5, and other detachable connection manners may be further included, which are not limited in the embodiment of the present invention.
The third linear motion member 30 may be detachably mounted on the base 40, and the detachable connection manner may be the same as the detachable connection manner between the first slide rail 12 and the second slide block 22 and the detachable connection manner between the second slide rail 21 and the third slide block 32, or may be another detachable connection manner, which is not limited in the embodiment of the present invention.
Through the detachable connection mode between first slide rail and second slider, second slide rail and third slider and third rectilinear motion component and the base for the device can dismantle under the condition of not using, thereby has saved the space of placing, and conveniently carries, can install fast simultaneously, makes the device use more nimble convenient.
Further, the fixing structure 60 includes a clamping structure for clamping the fixed sonic probe 50; specifically, referring to fig. 6, a schematic structural diagram of a clamping structure is shown, where the clamping structure may be formed by two clamping plates, and a middle of the two clamping plates is concave to clamp the sonic probe; if the sonic probe is other mechanism, the clamping structure can be correspondingly changed, and the embodiment of the invention is not limited to the above.
It should be noted that, the fixing structure 60 may be the clamping structure, and the clamping structure is fixed under the first slider 11 so as to move along with the movement of the first slider 11 on the first sliding rail 12; the fixing structure 60 may also comprise a clamping structure, for example, the clamping structure is fixed under the first slider 11 by other fixing members, which may be fixing plates, etc., and the clamping structure and the other fixing members are referred to as the fixing structure 60; in addition, the fixing structure may be other, and the embodiment of the present invention is not limited thereto, as long as it can be used for fixing the sound velocity probe 50.
Further, referring to fig. 6, a portion of the clamping structure in contact with the sonic probe is a structure 61 made of a sound absorbing material; the structure 61 of sound absorbing material is used to reduce the impact of noise generated by the scanning device on the testing of the sonic probe 50, thereby further improving the accuracy of the test results and reducing the error of the test results.
Further, the device also includes a displacement sensor 80, the installation position of the displacement sensor 80 corresponds to the installation position of the sound velocity probe 50; preferably, the displacement sensor is mounted on the first slider; in addition, the displacement sensor 80 may be mounted on the fixed structure 60, and specifically, may be mounted on the outside of the fixed structure 60. The displacement sensor 80 is a non-contact displacement sensor for monitoring the distance between the sound velocity probe and the surface of the measured object, and in addition, the displacement sensor 80 may be another displacement sensor; for example, if the fixing structure 60 includes a clamping structure, and the clamping structure is fixed on the first slider 11, the displacement sensor 80 may be located on one side of the sonic probe 50 on the first slider 11, and the installation position of the displacement sensor 80 on the first slider 11 may be shown with reference to fig. 7, where a horizontal line below in fig. 7 indicates a surface of the measured object, and a letter s indicates a distance from the surface of the measured object measured by the displacement sensor;
preferably, the height of the sound velocity probe 50 in the vertical direction at the installation position of the fixed structure 60 is consistent with the height of the displacement sensor 80, so that the distance between the sound velocity probe 50 and the surface of the measured piece is calculated through the distance measured by the displacement sensor 80, and the test is more convenient and concise; in addition, the installation position of the sound velocity probe 50 on the fixed structure 60 may be other, or the distance between the sound velocity probe and the displacement sensor may be calculated by other methods, so that the distance between the sound velocity probe and the surface of the measured object is calculated by the distance measured by the displacement sensor.
Further, the base 40 is provided with a sliding wheel 41 for moving the base and a locking structure 42 for locking the sliding wheel 41; referring to fig. 1, the base further includes a support bar 43, a first support surface 44 and a second support surface 45, the third linear motion member is disposed on the second support surface 45, the first support surface 44 and the second support surface 45 may be rectangular, the base 40 may further include a chain structure 46 for reinforcement and a chain fixing structure 47, the chain fixing structure is disposed on the support bar 43, and the chain structure 46 is disposed between four corners connected to the chain fixing structure 47 and the first support surface to reinforce the stability of the base 40, thereby improving the overall stability of the device.
The embodiment of the invention provides a near-field noise scanning test device, because a first linear motion member and a second linear motion member, a second linear motion member and a third linear motion member of the device are respectively and slidably connected, and the three linear motion members are mutually perpendicular, a motion structure with x, y and z axes is formed, and a fixed structure is slidably connected with the first linear motion member, and the fixed structure is used for fixing a sound velocity probe, so that the sound velocity probe can move along the axis of the first linear motion member, namely along the x axis, the sound velocity probe can move along the y axis through the sliding connection between the first linear motion member and the second linear motion member, the sound velocity probe can move along the z axis through the sliding connection between the second linear motion member and the third linear motion member, thereby carrying out noise scanning test on all directions of a tested piece, fixing the sound velocity probe in the measuring process, further ensuring the consistency of moving speed and distance, improving the accuracy of test results, being convenient to operate, being easy to control, and avoiding the problem of error caused by the fact that the sound velocity is not being held by hands by a hand of a person when the test person is in a hand-held mode; in addition, the device avoids the problems of equipment waste, high cost, difficult movement and complex control caused by clamping the sound velocity probe by the industrial mechanical arm.
It should be noted that the descriptions of "first," "second," and "third" in the embodiments of the present invention 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 defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present invention, which is not described herein.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The near-field noise scanning testing device is characterized by comprising a base, a first linear motion component, a second linear motion component, a third linear motion component and a fixing structure for fixing a sound velocity probe; the third linear motion member is arranged on the base, the first linear motion member is in sliding connection with the second linear motion member, and the second linear motion member is in sliding connection with the third linear motion member, and the first linear motion member, the second linear motion member and the third linear motion member are perpendicular to each other;
the fixed structure is connected with the first linear motion member in a sliding way;
the near-field noise scanning testing device comprises a first sliding block, wherein the first linear motion component comprises a first sliding rail, and the fixed structure is in sliding connection with the first sliding rail through the first sliding block;
the near-field noise scanning test device further comprises a displacement sensor, wherein the displacement sensor is arranged on the first sliding block, and the height of the sound velocity probe in the vertical direction at the installation position of the fixed structure is consistent with the height of the displacement sensor;
the base is provided with a sliding wheel for the base to move and a locking structure for locking the sliding wheel, and the third linear motion component is detachably arranged on the base;
the base still includes bracing piece, first holding surface and second holding surface, the third rectilinear motion component is located this second holding surface, and this first holding surface and second holding surface can be the rectangle, and this base can also include the used chain structure of reinforcement and chain fixed knot construct, chain fixed knot constructs and is located the bracing piece, and this chain structure is located and connects between the four corners of chain fixed knot constructs and first holding surface.
2. The near field noise scan test device of claim 1, further comprising a first drive mechanism for driving the stationary structure to slide on the first linear motion member, a second drive mechanism for driving the first linear motion member to slide on the second linear motion member, and a third drive mechanism for driving the second linear motion member to slide on the third linear motion member.
3. The near field noise scan test device of claim 2, wherein the first drive mechanism, the second drive mechanism, and the third drive mechanism each comprise a motor.
4. The near field noise scanning test device of claim 2, wherein said first linear motion member, said second linear motion member and said third linear motion member are at least one of a ball screw mechanism or a rack and pinion mating structure or a chain drive structure.
5. The near field noise scan test device of any one of claims 1-4, wherein,
the second linear motion member comprises a second slide rail, and the device further comprises a second sliding block arranged between the first slide rail and the second slide rail; the first sliding rail is connected with the second sliding rail in a sliding way through the second sliding block;
the third linear motion member comprises a third slide rail, and the device further comprises a third slide block arranged between the second slide rail and the third slide rail; the second sliding rail is connected with the third sliding rail in a sliding manner through the third sliding block.
6. The near field noise scan test device of claim 5, wherein the first slide rail is detachably connected to the second slide block and the second slide rail is detachably connected to the third slide block.
7. The near field noise scanning test device of any of claims 1-4, wherein said fixed structure comprises a clamping structure for clamping said sonic probe.
8. The near field noise scanning test device according to claim 7, wherein a portion of said clamping structure in contact with said sonic probe is a structure of a sound absorbing material.
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| CN201611238573.3A CN106644054B (en) | 2016-12-28 | 2016-12-28 | Near field noise scanning testing device |
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| CN201611238573.3A CN106644054B (en) | 2016-12-28 | 2016-12-28 | Near field noise scanning testing device |
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| CN106644054B true CN106644054B (en) | 2023-12-26 |
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| CN108917919A (en) * | 2018-07-23 | 2018-11-30 | 珠海格力电器股份有限公司 | Vibration testing system and vibration testing method |
| CN111948292A (en) * | 2020-06-29 | 2020-11-17 | 中国科学院深圳先进技术研究院 | Scanning device |
| CN113418722B (en) * | 2021-06-30 | 2023-04-07 | 一汽奔腾轿车有限公司 | Automobile sliding door opening and closing speed test rack and test method |
| CN115219014B (en) * | 2022-07-12 | 2023-04-07 | 国网安徽省电力有限公司马鞍山供电公司 | Power transformer with noise monitoring mechanism |
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