Noise testing device

Abstract

The invention relates to the field of motor noise testing, in particular to a noise testing device. The noise testing device comprises an object placing platform and a noise detection unit. A detected motor is placed on the object placing platform. The noise detection unit comprises a transverse detection assembly and a vertical detection assembly; the transverse detection assemblies are annularly distributed with the storage platform as the center, and each transverse detection assembly comprises a first adjusting part and a first detection part installed on the first adjusting part. According to the noise testing device provided by the invention, the infrared generator is arranged on one side of the sound level meter in a flush manner, and accurate positioning is performed by using the infrared generator, so that distance measurement positioning is more convenient, the measurement precision is higher, and the motor noise testing is more accurate.

Description

Technical Field

[0001] The invention relates to the field of motor noise testing, and in particular to a noise testing device. Background Art

[0002] Motor noise testing is a method of evaluating the sound level of a motor when it is running and is often used for product quality control, fault diagnosis and performance evaluation.

[0003] Noise testing is a test item in the factory test of motors. The standard GB10069 requires that the noise value be measured at a distance of 1 meter from the motor. In traditional testing, a ruler is generally used to measure the distance first, and then a sound level meter is set at a distance of 1 meter from the motor to complete the noise test.

[0004] However, there are still the following defects and shortcomings in the application process: When conducting noise testing on a motor, sound level meters need to be set up in front, behind, left, right and above the motor to ensure that the test is comprehensive and accurate. However, using a ruler to measure and adjust the distance is a cumbersome process with low accuracy, which will affect the accuracy of noise detection.

[0005] Therefore, it is necessary to provide a new noise testing device to solve the above technical problems. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a noise testing device.

[0007] The noise testing device provided by the present invention comprises a placing platform and a noise detection unit, wherein a motor to be detected is placed on the placing platform; The noise detection unit includes a horizontal detection component and a vertical detection component; The lateral detection components are multiple and are distributed in a ring shape with the storage platform as the center. The lateral detection components include a first adjustment part and a first detection part installed on the first adjustment part. The first detection part is a first sound level meter and a first infrared generator. The first sound level meter and the first infrared generator are arranged flush with each other, and the first adjustment part is used to change the height of the first sound level meter and the first infrared generator and the distance from the storage platform. The vertical detection component is fixed on the horizontal detection component and is located directly above the storage platform. The vertical detection component includes a second adjustment part and a second detection part. The second detection part includes a second sound level meter and a second infrared generator. The second sound level meter and the second infrared generator are arranged flush, and the second adjustment part is used to change the position of the second sound level meter and the second infrared generator corresponding to the storage platform and the distance between them and the storage platform.

[0008] Preferably, the first adjustment part comprises a bottom plate fixed to the side of the storage platform, the bottom plate is arranged horizontally, a first linear guide rail along the length direction is fixed to the upper end of the bottom plate, and a first slide seat is installed through the first linear guide rail; A mounting frame is fixed to the upper end of the first slide, a vertically arranged first mounting plate is fixed to the mounting frame, a second linear guide rail along the length direction is fixed to one side of the first mounting plate, and a second slide is mounted via the second linear guide rail.

[0009] Preferably, a reinforcement frame and a storage rack are fixed to one side of the second slide seat, the storage rack is mounted on the reinforcement frame, a horizontally arranged cross plate is also fixed on the storage rack, and a storage slot for placing the first sound level meter is formed between the cross plate and the storage rack.

[0010] Preferably, two parallel limit plates are fixed to the upper end of the horizontal plate, a slide groove for installing the first infrared generator is formed between the two limit plates, and the two limit plates have an embedding groove on the opposite sides, and the first infrared generator is fixed with a first socket that is plugged into the slide groove, and the side of the first socket also has an embedding strip that is plugged into the embedding groove.

[0011] Preferably, in two of the lateral detection assemblies that are positioned opposite to each other, an extension plate is further fixed to one side of the base plate.

[0012] Preferably, the second adjustment part includes a support frame vertically fixed on the extension plate, a track rod horizontally arranged and erected above the storage platform is fixed between the two support frames, a base frame is arranged on one side of the track rod, rollers rolling on the track rod and a stepper motor driving the rollers to rotate are installed on the base frame, a second vertically arranged mounting plate is also fixed on one side of the base frame, a third linear guide rail along the length direction is fixed on one side of the second mounting plate, and a third slide is installed through the third linear guide rail.

[0013] Preferably, a fixing frame for placing the second sound level meter is fixed on one side of the third slide, and a threaded tightening bolt is passed through one side of the fixing frame, and the feed end of the tightening bolt has a rubber head that can tighten the second sound level meter.

[0014] Preferably, a bracket is fixed on one side of the fixing frame, a slot for installing a second infrared generator is formed between the bracket and the fixing frame, the bottom of the slot is closed, a second socket is fixed on the second infrared generator, and the second socket is plugged into the slot.

[0015] Preferably, the minimum distance between the first sound level meter and the second sound level meter and the center of the storage platform is 100 cm, and the maximum distance is 150 cm-200 cm.

[0016] Compared with the related art, the noise testing device provided by the present invention has the following beneficial effects: 1. An infrared generator is set flush with one side of the sound level meter, and the infrared generator is used for precise positioning. Therefore, it will be more convenient to measure the distance and positioning, and the measurement accuracy will be higher, so the test of motor noise will be more accurate; 2. The adjustment part can drive the sound level meter and the infrared generator to automatically move and adjust, so as to adjust the distance between the sound level meter and the motor to be detected, and can change the position of the sound level meter corresponding to the motor to be detected, so as to further improve the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a preferred embodiment of the noise testing device provided by the present invention; Figure 2 A schematic diagram of the structure of the lateral detection assembly shown in the present invention Figure 1 ; Figure 3 A schematic diagram of the structure of the lateral detection assembly shown in the present invention Figure 2 ; Figure 4 A schematic diagram of the structure of the lateral detection assembly shown in the present invention Figure 3 ; Figure 5 A schematic diagram of the structure of the vertical detection component shown in the present invention Figure 1 ; Figure 6 A schematic diagram of the structure of the vertical detection component shown in the present invention Figure 2 ; Figure 7 It is a structural schematic diagram of the detection state of the lateral detection component shown in the present invention; Figure 8 It is a structural schematic diagram of the detection state of the vertical detection component shown in the present invention.

[0018] Numbers in the figure: 1. Storage platform; 2. Noise detection unit; 21. Horizontal detection assembly; 211. Bottom plate; 212. First linear guide; 213. First slide; 214. Mounting frame; 215. First mounting plate; 216. Second linear guide; 217. Second slide; 218. Reinforcement frame; 219. Storage rack; 2110. Horizontal plate; 2111. First sound level meter; 2112. Limit plate; 2113. Embossed groove; 2114. First infrared generator; 2115. First socket; 2116. Embossed strip; 2117. Extension plate; 22. Vertical detection assembly; 221. Support frame; 222. Track rod; 223. Base frame; 224. Roller; 225. Stepper motor; 226. Second mounting plate; 227. Third linear guide rail; 228. Third slide seat; 229. Fixed frame; 2210. Second sound level meter; 2211. Tighten bolts; 2212. Bracket; 2213. Second infrared generator; 2214. Second socket. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0021] See also Figures 1 to 8 The embodiment of the present invention provides a noise testing device, the noise testing device includes a storage platform 1 and a noise detection unit 2. The noise detection unit 2 is composed of a plurality of lateral detection components 21 and a vertical detection component 22. The plurality of lateral detection components 21 are distributed in a ring shape with the storage platform 1 as the center, and the vertical detection component 22 is set up directly above the storage platform 1. The lateral detection assembly 21 includes a first adjustment part and a first detection part installed on the first adjustment part. The first detection part is a first sound level meter 2111 and a first infrared generator 2114. The first sound level meter 2111 and the first infrared generator 2114 are arranged flush with each other, and the first adjustment part is used to change the height of the first sound level meter 2111 and the first infrared generator 2114 and the distance from the storage platform 1. The vertical detection component 22 is fixed on the horizontal detection component 21 and is located directly above the storage platform 1. The vertical detection component 22 includes a second adjustment part and a second detection part. The second detection part includes a second sound level meter 2210 and a second infrared generator 2213. The second sound level meter 2210 and the second infrared generator 2213 are arranged flush with each other, and the second adjustment part is used to change the position of the second sound level meter 2210 and the second infrared generator 2213 corresponding to the storage platform 1 and the distance from the storage platform 1; The minimum distance between the first sound level meter 2111 and the second sound level meter 2210 and the center of the storage platform 1 is 100 cm, and the maximum distance is 150 cm-200 cm.

[0022] It should be noted that: in this test device, the placement platform 1 is used as the center point, on which the motor to be tested is placed, and horizontal detection components 21 are arranged in the front, rear, left and right directions of the placement platform 1, and a vertical detection component 22 is arranged above the placement platform 1, so that the noise test of the motor can be realized from multiple directions; The sound level meter is the main detection equipment in the detection unit. The sound level meter is an instrument used to measure the sound pressure level or sound level of sound. It is the most basic and commonly used instrument in acoustic measurement. It can simulate the different sensitivities of human hearing at different frequencies, and correct the electrical signal through the weighting network to obtain a sound level that is close to the hearing sense. The infrared generator set at the same time is the main distance measurement structure, that is, the position of the phase motor emits infrared rays to determine the distance. Compared with the traditional measurement method, this distance measurement method will be more convenient and accurate, and thus can improve the accuracy of subsequent noise testing; The adjustment part is used to install and adjust the sound level meter and infrared generator, so that the distance between the sound level meter and the motor is kept at 1 meter. At the same time, the position of the sound level meter corresponding to the motor can be adjusted. Therefore, this test device is more comprehensive and has better test results. By setting the distance between the sound level meter and the storage platform 1, the sound level meter itself can have an adjustable floating space to adapt to different types of motors, so that its application range will be wider; It should also be noted that encoders are also provided for each infrared generator and sound level meter to make targeted adjustments according to different types of motors. At the same time, the infrared generator adjusts the adjustment unit according to the actual measured value, and the adjustment unit receives the instruction to drive the sound level meter to adjust the position. For the first sound level meter 2111, the first infrared generator 2114, the second sound level meter 2210 and the second infrared generator 2213 used in the horizontal detection component 21 and the vertical detection component 22, by selecting the same type of detection equipment, the consistency of the measured values ​​can be ensured, and deviations due to different equipment models can be avoided.

[0023] In the embodiments of the present invention, please refer to Figures 2 to 4 The first adjustment part includes a bottom plate 211 fixed to the side of the storage platform 1, the bottom plate 211 is arranged horizontally, a first linear guide rail 212 is fixed along the length direction at the upper end of the bottom plate 211, and a first slide 213 is installed through the first linear guide rail 212, and an extension plate 2117 is also fixed to one side of the bottom plate 211 in the two oppositely positioned lateral detection components 21; A mounting frame 214 is fixed to the upper end of the first slide 213, a vertically arranged first mounting plate 215 is fixed to the mounting frame 214, a second linear guide rail 216 along the length direction is fixed to one side of the first mounting plate 215, and a second slide 217 is mounted through the second linear guide rail 216; A reinforcement frame 218 and a storage rack 219 are fixed to one side of the second slide 217. The storage rack 219 is mounted on the reinforcement frame 218. A horizontally arranged transverse plate 2110 is also fixed to the storage rack 219. A storage slot for placing the first sound level meter 2111 is formed between the transverse plate 2110 and the storage rack 219. Two parallel limiting plates 2112 are fixed to the upper end of the horizontal plate 2110, and a slide groove for installing the first infrared generator 2114 is formed between the two limiting plates 2112. The two limiting plates 2112 have an embedding groove 2113 on the opposite sides, and the first infrared generator 2114 is fixed with a first socket 2115 which is plugged into the inside of the slide groove. The side of the first socket 2115 also has a strip 2116 which is plugged into the inside of the embedding groove 2113.

[0024] It should be noted that: for the lateral detection component 21, the first infrared generator 2114 is first used to determine the distance, and the infrared rays emitted by it are directly irradiated on the motor to test the distance between the two. When there is an obvious deviation in the distance, the obtained information is fed back to the first adjustment part, and the first slide 213 in the first adjustment part moves along the first linear guide rail 212, so as to adjust the distance between the first sound level meter 2111 and the motor; Different types of motors have different heights, so a second slide 217 that can be raised and lowered is provided, and the first sound level meter 2111 and the first infrared generator 2114 are both installed on the second slide 217. Therefore, when the second slide 217 is raised and lowered, the first sound level meter 2111 can be driven to move together, so that the first sound level meter 2111 and the motor are kept in the best position, thereby improving the test effect of noise; As for the installation of the first sound level meter 2111 and the first infrared generator 2114, both are installed by simple plug-in, and the operation process is very simple. Therefore, after the detection is completed, the first sound level meter 2111 and the first infrared generator 2114 can be directly disassembled for storage.

[0025] In the embodiments of the present invention, please refer to Figure 5 and Figure 6The second adjustment part includes a support frame 221 vertically fixed on the extension plate 2117, a track rod 222 horizontally arranged and erected above the storage platform 1 is fixed between the two support frames 221, a base frame 223 is arranged on one side of the track rod 222, a roller 224 rolling on the track rod 222 and a stepper motor 225 driving the roller 224 to rotate are installed on the base frame 223, a second vertically arranged mounting plate 226 is also fixed on one side of the base frame 223, a third linear guide rail 227 along the length direction is fixed on one side of the second mounting plate 226, and a third slide 228 is installed through the third linear guide rail 227; A fixing frame 229 for placing the second sound level meter 2210 is fixed on one side of the third slide 228. A threaded tightening bolt 2211 is also passed through one side of the fixing frame 229. The feed end of the tightening bolt 2211 has a rubber head that can press against the second sound level meter 2210. A bracket 2212 is also fixed on one side of the fixed frame 229, and a slot for installing a second infrared generator 2213 is formed between the bracket 2212 and the fixed frame 229. The bottom of the slot is closed, and a second socket 2214 is fixed on the second infrared generator 2213, and the second socket 2214 is plugged into the slot.

[0026] It should be noted that: for the vertical detection component 22, a roller 224 rolling on the track rod 222 is provided on the base frame 223, and at the same time, the base frame 223 is the basis for installing the second sound level meter 2210 and the second infrared generator 2213, that is, the base frame 223 can realize horizontal movement to change the position of the second sound level meter 2210 corresponding to the motor; The third slide 228 can move in the vertical direction, that is, after the second infrared generator 2213 obtains the distance measurement information, it is fed back to the third slide 228, so as to control the lifting and lowering of the third slide 228, so as to change the distance between the second sound level meter 2210 and the motor; Regarding the installation of the second sound level meter 2210 and the second infrared generator 2213, since the infrared generator itself is relatively light in weight, it is installed on the bracket 2212 by plugging, which can ensure the stability of the stand, and the second sound level meter 2210 can also be plugged into the inside of the fixed frame 229, and the second sound level meter 2210 is tightened by tightening the bolts 2211 to further reinforce the second sound level meter 2210. At the same time, a rubber block is provided on the tightening bolts 2211, and when the second sound level meter 2210 is pressed, it will not cause damage to the second sound level meter 2210.

[0027] The specific usage process of the device is as follows: (1) Placement of the motor; Place the motor to be tested directly on the storage platform 1, and try to keep the motor in the center and avoid deviation in the horizontal direction; (2) Adjustment of the lateral detection component; First, the first infrared generator 2114 is turned on to determine the distance between the first sound level meter 2111 and the motor. When there is a deviation in the distance, a command is sent to the first slide 213 to move the first slide 213 along the first linear guide 212, thereby adjusting the distance between the first sound level meter 2111 and the motor; (if there is a large height difference between the motor and the first sound level meter 2111 in the vertical direction, the height of the first sound level meter 2111 is adjusted first, and then the distance is adjusted. When adjusting the height, it is achieved by lifting and lowering the second slide 217); (3) Adjustment of the vertical detection component; First, the position of the second sound level meter 2210 corresponding to the motor is adjusted by rolling the roller 224, and then the second infrared generator 2213 is turned on to determine the distance between the second sound level meter 2210 and the motor. When there is a deviation in the distance, a command is sent to the third slide 228 to move the third slide 228 along the third linear guide 227, thereby realizing the distance between the second sound level meter 2210 and the motor.

[0028] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A noise testing device, comprising a storage platform (1) and a noise detection unit (2), wherein a motor to be tested is placed on the storage platform (1), and characterized in that: The noise detection unit (2) comprises a lateral detection component (21) and a vertical detection component (22); The lateral detection components (21) are multiple and are distributed in a ring shape with the storage platform (1) as the center. The lateral detection components (21) include a first adjustment part and a first detection part installed on the first adjustment part. The first detection part is a first sound level meter (2111) and a first infrared generator (2114). The first sound level meter (2111) and the first infrared generator (2114) are arranged flush with each other, and the first adjustment part is used to change the height of the first sound level meter (2111) and the first infrared generator (2114) and the distance between them and the storage platform (1). The vertical detection component (22) is fixed on the horizontal detection component (21) and is located directly above the storage platform (1). The vertical detection component (22) comprises a second adjustment portion and a second detection portion. The second detection portion comprises a second sound level meter (2210) and a second infrared generator (2213). The second sound level meter (2210) and the second infrared generator (2213) are arranged flush with each other, and the second adjustment portion is used to change the position of the second sound level meter (2210) and the second infrared generator (2213) corresponding to the storage platform (1) and the distance between the second sound level meter (2210) and the second infrared generator (2213) and the storage platform (1).

2. The noise testing device according to claim 1, characterized in that: The first adjustment portion comprises a bottom plate (211) fixed to the side of the storage platform (1), the bottom plate (211) being arranged horizontally, a first linear guide rail (212) being fixed to the upper end of the bottom plate (211) along the length direction, and a first slide seat (213) being installed via the first linear guide rail (212); A mounting frame (214) is fixed to the upper end of the first slide (213), a vertically arranged first mounting plate (215) is fixed to the mounting frame (214), a second linear guide rail (216) along the length direction is fixed to one side of the first mounting plate (215), and a second slide (217) is mounted via the second linear guide rail (216).

3. The noise testing device according to claim 2, characterized in that: A reinforcing frame (218) and a storage rack (219) are fixed to one side of the second sliding seat (217); the storage rack (219) is mounted on the reinforcing frame (218); a horizontally arranged transverse plate (2110) is also fixed to the storage rack (219); a storage slot for placing the first sound level meter (2111) is formed between the transverse plate (2110) and the storage rack (219).

4. The noise testing device according to claim 3, characterized in that: Two parallel limiting plates (2112) are fixed to the upper end of the horizontal plate (2110), a slide groove for installing the first infrared generator (2114) is formed between the two limiting plates (2112), and opposite sides of the two limiting plates (2112) are provided with an embedding groove (2113), and the first infrared generator (2114) is fixed with a first socket (2115) inserted into the inside of the slide groove, and the side of the first socket (2115) is also provided with a embedding strip (2116) inserted into the inside of the embedding groove (2113).

5. The noise testing device according to claim 2, characterized in that: In two of the lateral detection assemblies (21) that are located opposite to each other, an extension plate (2117) is also fixed to one side of the bottom plate (211).

6. The noise testing device according to claim 1, characterized in that: The second adjustment portion comprises a support frame (221) vertically fixed on the extension plate (2117); a track rod (222) horizontally arranged and mounted above the storage platform (1) is fixed between the two support frames (221); a base frame (223) is arranged on one side of the track rod (222); a roller (224) rolling on the track rod (222) and a stepping motor (225) driving the roller (224) to rotate are mounted on the base frame (223); a second mounting plate (226) vertically arranged is also fixed on one side of the base frame (223); a third linear guide rail (227) along the length direction is fixed on one side of the second mounting plate (226); and a third slide seat (228) is mounted via the third linear guide rail (227).

7. The noise testing device according to claim 6, characterized in that: A fixing frame (229) for placing the second sound level meter (2210) is fixed on one side of the third slide seat (228), and a threaded tightening bolt (2211) is also passed through one side of the fixing frame (229), and the feed end of the tightening bolt (2211) has a rubber head that can be tightened against the second sound level meter (2210).

8. The noise testing device according to claim 7, characterized in that: A bracket (2212) is also fixed on one side of the fixing frame (229), and a slot for installing a second infrared generator (2213) is formed between the bracket (2212) and the fixing frame (229), the bottom of the slot is closed, and a second socket (2214) is fixed on the second infrared generator (2213), and the second socket (2214) is plugged into the slot.

9. The noise testing device according to claim 1, characterized in that: The minimum distance between the first sound level meter (2111) and the second sound level meter (2210) and the center position of the storage platform (1) is 100 cm, and the maximum distance is 150 cm-200 cm.

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