Mechanism and method for online batch detection of vibration of nonmagnetic surfaces of products

Abstract

The invention discloses a mechanism and a method for online batch detection of nonmagnetic surface vibration of products. The mechanism mainly comprises a vibration sensor, a vibration sensor clamp, a damping elastic element, a cylinder assembly and a connecting assembly. One end of the damping elastic element is fixedly connected with the vibration sensor clamp, and the other end is fixedly connected with the cylinder assembly through the connecting assembly; the vibration sensor clamp is fixedly connected with a vibration sensor; according to the method, on the premise that measurement accuracy and a wide frequency band range are ensured, the vibration sensor is close to and contacted with the vibration surface of the to-be-measured object, so that the vibration sensor can move along with the vibration surface of the to-be-measured object and is not separated from the vibration surface of the to-be-measured object; therefore, the vibration acceleration of the non-magnetic surface of the product can be accurately measured in batches on a production line, a vibration acceleration signal reflecting the state of the product can be provided for online judgment of the quality of the product, and automatic detection of the vibration acceleration of the product is realized.

Description

Technical Field

[0001] The invention belongs to the field of detection platform and mechanical design, and in particular relates to a mechanism and method for online batch detection of non-magnetic surface vibration of products. Background Art

[0002] Vibration measurement plays an important role in many academic and engineering fields, including but not limited to structural health monitoring, dynamic testing and analysis, vibration control research, aerospace engineering, automotive dynamics research, etc. Through accurate vibration measurement, researchers and engineers can better understand and predict the dynamic behavior of objects, thereby optimizing design, improving performance and ensuring safety.

[0003] The vibration measuring mechanisms commonly used nowadays include linear bearing type, multi-layer wave spring type, spherical rubber air spring vibration measuring mechanism, etc. However, the above devices all have some shortcomings in actual use, such as: after a period of use, the linear bearing vibration measuring mechanism will have insufficient internal lubrication of the bearing, which will lead to increased friction and wear, causing changes in the collected samples and affecting the consistency of the samples; the multi-layer wave spring vibration measuring mechanism has friction between the layers of the spring, and the friction of the spring itself will contaminate the sample, which will also affect the consistency of the sample; although the spherical rubber air spring vibration measuring mechanism is more stable during the measurement process, it has poor versatility, requires customization and is difficult to manufacture, has a high cost of use, and is not suitable for large-scale vibration detection in factories. In summary, the vibration measuring mechanisms that are currently widely used will wear out due to long-term use, which will lead to the emergence of some measurement errors.

[0004] Non-magnetic surface vibration monitoring technology has made significant progress in the fields of industrial automation, medical health monitoring, machine fault diagnosis, etc., making vibration monitoring more accurate and efficient. It has also promoted the digital transformation of vibration monitoring equipment and provided strong technical support for predictive maintenance and intelligent diagnosis. Commonly used non-magnetic surface vibration monitoring technologies include laser Doppler vibration measurement technology, single sensor vibration source tracing technology, wireless passive surface acoustic wave strain sensing technology, etc., but they all have the disadvantages of high cost, cumbersome operation, high requirements for the application environment of the technology, and poor adaptability. Summary of the invention

[0005] The technical problem solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a mechanism and method for online batch detection of non-magnetic surface vibration of products.

[0006] A mechanism for online batch detection of vibration of non-magnetic surfaces of products, characterized in that: the device can automatically batch detect the vibration of non-magnetic surfaces of products, and the device includes a vibration sensor, a vibration sensor fixture, a damping elastic element, a connecting assembly and a cylinder assembly, etc.; one end of the damping elastic element is fixedly connected to the vibration sensor fixture, and the other end is fixedly connected to the cylinder assembly through the connecting assembly; the vibration sensor fixture is fixedly connected to the vibration sensor.

[0007] The central axes of the vibration sensor, the vibration sensor fixture, the damping elastic element, and the cylinder assembly are all on the same straight line during operation, thereby ensuring that the speed transmission direction of the entire mechanism is consistent and reducing detection errors.

[0008] One end of the damping elastic element is fixedly connected to the vibration sensor fixture, and the other end is fixedly connected to the cylinder assembly through a connecting assembly; the element as a whole is an elastic structure or material with damping. The appearance shape of the damping elastic element can be spherical or prolate ellipsoidal; it can be a hollow sphere filled with gas and ensuring good air tightness, or it can be a solid material with an elastic coefficient that meets the requirements.

[0009] The overall shape of the vibration sensor fixture is but not limited to a cylindrical shape; a slot matching the vibration sensor is provided on the top, and four set screws are provided around the slot, but not limited to; the vibration sensor and the vibration sensor fixture are installed to form a vibration sensor component without relative movement between them.

[0010] A method for online batch detection of non-magnetic surface vibration of products, characterized in that: under the premise of ensuring measurement accuracy and a wide frequency band range, a vibration sensor contacts the vibrating surface of an object to be measured and moves with the vibrating surface of the object to be measured. During the entire measurement process, the vibration sensor always keeps in contact with the vibrating surface of the object to be measured.

[0011] During the measurement process, the cylinder assembly, pushed by air pressure, drives the vibration sensor to approach and contact the vibrating surface of the object to be measured, and makes the object to be measured bear a certain pressure. The pressure should be large enough not to significantly change the vibration state of the surface of the object to be measured. The damping elastic element can reduce the impact caused by the excessive contact between the vibration sensor and the object to be measured, and ensure the deformation space of the reciprocating vibration of the object to be measured. It can adapt to the pressure of the piston inside the cylinder assembly to ensure that the vibration sensor can move with the vibrating surface of the object to be measured without separating from the vibrating surface of the object to be measured.

[0012] The device drives the vibration sensor to contact or separate from the object to be tested through the movement of the piston inside the cylinder assembly. When the vibration sensor contacts the object to be tested, the piston inside the cylinder assembly should be in the middle position of the cylinder. During the test, the cylinder always maintains pressure, and the vibration structural deformation of the object to be tested caused by the pressure should be less than the allowable value.

[0013] Assume that the mass of the sensor component is M. Under the action of compressed air, the cylinder piston is subjected to air pressure, which is transmitted along the guide rod, through the damping elastic element, and transmitted to the vibration sensor component. Assume that the magnitude of the pressure on the vibration sensor component is F. The maximum vibration acceleration of the object to be measured is The condition to ensure that the vibration sensor component is always in contact with the object to be measured is .

[0014] Adjust the distance between the damping elastic element and the object to be measured. During the entire process of the vibration sensor component contacting the object to be measured, the damping elastic element should be kept in a compressed state, but not compressed to the limit position. The object to be measured can always be subjected to the pressure of the vibration sensor during the up and down reciprocating vibration process. When the maximum vibration acceleration of the object to be measured changes, there is still room for deformation.

[0015] Compared with the prior art, the mechanism and method for online batch detection of non-magnetic surface vibration of products provided by the present invention have the following beneficial effects: 1. The present invention can solve the problems that vibration sensors for online batch vibration detection need to frequently contact with a large number of different non-magnetic objects to be measured, the installation and disassembly of vibration sensors are cumbersome, and automation is difficult. When using vibration sensors to batch detect the vibration acceleration of non-magnetic products on the production line, the vibration sensors need to frequently contact and detach from the objects to be measured; to ensure accurate measurement, the vibration sensors need to be in contact with the non-magnetic objects to be measured at all times. In the prior art, the probe method has a too narrow frequency band, the magnetic suction method cannot be used, and the bonding or threading method takes a long time to install and disassemble. It is difficult to meet the detection requirements of high-frequency contact and detachment, and it is impossible to achieve automatic measurement of product vibration acceleration.

[0016] Compared with the existing acceleration sensor installation methods such as probes, threads, magnetic bases, and pasting, the present invention provides a mechanism and method for online batch detection of non-magnetic surface vibration of products. The vibration sensor component composed of the vibration sensor and the vibration sensor fixture in the present invention only needs to be close to the non-magnetic object to be measured. During the detection, the mechanism can move with the vibration surface of the object to be measured to complete the measurement without being fixedly connected to the object to be measured; and the damping elastic element in the mechanism can not only slow down the impact caused by excessive contact between the vibration sensor and the object to be measured, but also ensure the deformation space of the reciprocating vibration of the object to be measured, and can adapt to the pressure of the piston inside the cylinder assembly to ensure that the vibration sensor can move with the vibration surface of the object to be measured without being separated from the vibration surface of the object to be measured. Make the detection process easier to automate, more efficient, and simpler to operate. Under the premise of ensuring measurement accuracy and a wider frequency band range, the automatic detection of product vibration acceleration can be realized, which is particularly suitable for measuring the vibration acceleration of batch products on the production line in a contact manner, and can provide a vibration acceleration signal that truly reflects the product status for online determination of product quality.

[0017] 2. When the present invention realizes online measurement of the vibration acceleration of a non-magnetic object to be measured, the damping elastic element and cylinder assembly provided by the present invention can ensure that the vibration sensor is always in close contact with the surface of the object to be measured during the measurement process, and the vibration of the contact point between the vibration sensor and the object to be measured can be accurately and reliably measured. The measurement result is not affected by the clamping device, and the acceleration measurement result will not be affected by changes in the clamping device. Because it is a crimping method, it can easily contact and detach from the object to be measured, and it is easy to realize automated batch online detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0019] Figure 2 It is a working schematic diagram of the first embodiment of the present invention.

[0020] Figure 3 It is a structural schematic diagram of a vibration sensor fixture and a vibration sensor according to a second embodiment of the present invention.

[0021] Figure 4 This is a diagram of actual detection results of Example 6 of the present invention. DETAILED DESCRIPTION

[0022] A mechanism for online batch detection of non-magnetic surface vibration of products comprises a vibration sensor, a vibration sensor fixture, a damping elastic element, a connecting assembly and a cylinder assembly, etc.; one end of the damping elastic element is fixedly connected to the vibration sensor fixture, and the other end is fixedly connected to the cylinder assembly through the connecting assembly; the vibration sensor fixture is fixedly connected to the vibration sensor.

[0023] The central axes of the vibration sensor, the vibration sensor fixture, the damping elastic element, and the cylinder assembly are all on the same straight line during operation, thereby ensuring that the speed transmission direction of the entire mechanism is consistent and reducing detection errors.

[0024] One end of the damping elastic element is fixedly connected to the vibration sensor fixture, and the other end is fixedly connected to the cylinder assembly through a connecting assembly; the element as a whole is an elastic structure or material with damping. The appearance shape of the damping elastic element can be spherical or prolate ellipsoidal; it can be a hollow sphere filled with gas and ensuring good air tightness, or it can be a solid material with an elastic coefficient that meets the requirements.

[0025] The overall shape of the vibration sensor fixture is but not limited to a cylindrical shape; a slot matching the vibration sensor is provided on the top, and four set screws are provided around the slot, but not limited to; the vibration sensor and the vibration sensor fixture are installed to form a vibration sensor component without relative movement between them.

[0026] A method for online batch detection of non-magnetic surface vibration of products. Under the premise of ensuring measurement accuracy and a wide frequency band, a vibration sensor contacts the vibrating surface of the object to be measured and moves with the vibrating surface of the object to be measured. During the entire measurement process, the vibration sensor always keeps in contact with the vibrating surface of the object to be measured.

[0027] During the measurement process, the cylinder assembly, pushed by air pressure, drives the vibration sensor to approach and contact the vibrating surface of the object to be measured, and makes the object to be measured bear a certain pressure. The pressure should be large enough not to significantly change the vibration state of the surface of the object to be measured. The damping elastic element can reduce the impact caused by the excessive contact between the vibration sensor and the object to be measured, and ensure the deformation space of the reciprocating vibration of the object to be measured. It can adapt to the pressure of the piston inside the cylinder assembly to ensure that the vibration sensor can move with the vibrating surface of the object to be measured without separating from the vibrating surface of the object to be measured.

[0028] The device drives the vibration sensor to contact or separate from the object to be tested through the movement of the piston inside the cylinder assembly. When the vibration sensor contacts the object to be tested, the piston inside the cylinder assembly should be in the middle position of the cylinder. During the test, the cylinder always maintains pressure, and the vibration structural deformation of the object to be tested caused by the pressure should be less than the allowable value.

[0029] Assume that the mass of the sensor component is M. Under the action of compressed air, the cylinder piston is subjected to air pressure, which is transmitted along the guide rod, through the damping elastic element, and transmitted to the vibration sensor component. Assume that the magnitude of the pressure on the vibration sensor component is F. The maximum vibration acceleration of the object to be measured is The condition to ensure that the vibration sensor component is always in contact with the object to be measured is .

[0030] Adjust the distance between the damping elastic element and the object to be measured. During the entire process of the vibration sensor component contacting the object to be measured, the damping elastic element should be kept in a compressed state, but not compressed to the limit position. The object to be measured can always be subjected to the pressure of the vibration sensor during the up and down reciprocating vibration process. When the maximum vibration acceleration of the object to be measured changes, there is still room for deformation.

[0031] The following is further described in conjunction with specific embodiments. Embodiment 1

[0032] See also Figure 1According to the structural embodiment of a mechanism and method for online batch detection of non-magnetic surface vibration of products provided by the present invention, its components include: vibration sensor 1, set screw 2, vibration sensor fixture 3, damping elastic element 4, connection assembly 5, cylinder assembly 6. The present invention can solve the problem that the vibration sensor for online batch vibration detection needs to frequently contact a large number of different non-magnetic objects to be measured, the installation and disassembly of the vibration sensor is cumbersome, and automation is difficult. Compared with the prior art threaded installation, magnetic base installation, and adhesive installation, automation is easier, efficiency is higher, and operation is simpler, and it is particularly suitable for online batch online vibration detection.

[0033] See also Figure 1 According to the above structural embodiment of the present invention, the central axes of the vibration sensor 1, the vibration sensor fixture 3, the damping elastic element 4, and the cylinder assembly 6 are all on the same line during operation, which can ensure that the speed transmission direction of the entire mechanism is consistent and reduce detection errors. The cylinder assembly 6 can be used to adjust the size of the delivered air pressure according to actual conditions, greatly improve the accuracy of detection, and occupy a small space, which is suitable for large-scale use in factories. The damping elastic element 4 and the vibration sensor fixture 3 can be fixedly connected by a threaded stud connection, a snap-on slot connection, a plug-in connection, etc. The purpose is to facilitate the disassembly and assembly of the entire structure and reduce unnecessary workload.

[0034] See also Figure 2 According to an embodiment of the mechanism and method for online batch detection of non-magnetic surface vibration of products provided by the present invention, the components include: a vibration sensor 1, a set screw 2, a vibration sensor fixture 3, a damping elastic element 4, a connecting assembly 5, a cylinder assembly 6, and an object to be measured 7. When the present invention realizes the online measurement of the vibration acceleration of the non-magnetic object to be measured, it can ensure that the vibration sensor 1 is always in close contact with the surface of the object to be measured 7 during the measurement process, accurately and reliably measure the vibration of the contact point between the vibration sensor 1 and the object to be measured 7, and the measurement result is not affected by the clamping device, and the acceleration measurement result will not be affected by the change of the clamping device. Because it is a crimping method, it can easily contact and detach from the object to be measured 7, and it is easy to realize automatic batch online detection.

[0035] See also Figure 2 According to the working embodiment of the present invention, the mechanism can be installed by pressing down on the object to be measured 7, or installed by pushing up on the object to be measured 7, or installed obliquely or horizontally in other directions of the object to be measured 7, so as to complete the vibration acceleration measurement of each position point of the object to be measured 7. The vibration acceleration measurement steps of the object to be measured 7 are greatly simplified. Embodiment 2

[0036] See also Figure 3, according to the structural embodiment of a vibration sensor fixture and a vibration sensor of a mechanism and method for online batch detection of non-magnetic surface vibration of products provided by the present invention. During installation, the vibration sensor 1 is placed in the slot at the top of the vibration sensor fixture 3, the size of the slot is basically consistent with the size of the vibration sensor 1, and then the four set screws 2 on the vibration sensor fixture 3 are tightened until the vibration sensor 1 is firmly clamped, so that the vibration sensor 1 is stable and immovable, and is on the same line with the central axis of the vibration sensor fixture 3, the damping elastic element 4, and the cylinder assembly 6. This can prevent the vibration sensor 1 from displacement or rotation during the detection process, ensuring that the detection results of the vibration sensor 1 over a long period of time have a high degree of consistency and repeatability. Embodiment 3

[0037] According to a method for online batch detection of non-magnetic surface vibration of products provided by the present invention, during the measurement process, the cylinder assembly 6, under the impetus of air pressure, drives the vibration sensor 1 to approach and contact the vibrating surface of the object to be measured 7, and makes the object to be measured 7 bear a certain pressure, the pressure size is preferably not to significantly change the surface vibration state of the object to be measured 7, the damping elastic element 4 can not only alleviate the impact generated when the vibration sensor 1 contacts the object to be measured 7, but also ensure the deformation space of the reciprocating vibration of the object to be measured 7, and can adapt to the pressure of the piston inside the cylinder assembly 6, to ensure that the vibration sensor 1 can move with the vibrating surface of the object to be measured 7, but also does not separate from the vibrating surface of the object to be measured 7. Embodiment 4

[0038] According to a method for online batch detection of non-magnetic surface vibration of products provided by the present invention, during the measurement process, the piston inside the cylinder assembly 6 moves, driving the vibration sensor 1 to contact or separate from the object to be measured 7. When the vibration sensor 1 contacts the object to be measured 7, the piston inside the cylinder assembly 6 should be in the middle position of the cylinder. The cylinder always maintains pressure during the entire measurement process, and the vibration structural deformation of the object to be measured 7 caused by the pressure is less than the allowable value. Embodiment 5

[0039] According to a method for online batch detection of non-magnetic surface vibration of products provided by the present invention, before starting the measurement work, the distance between the damping elastic element 4 and the object to be measured 7 is adjusted. During the entire process of contact between the vibration sensor 1 and the object to be measured 7, the damping elastic element 4 should be kept in a compressed state, but should not be compressed to the extreme position. Embodiment 6

[0040] Taking the product inspection of an actual production line as an example, it is required that the maximum value of the surface vibration of the object to be tested does not exceed 30m / s 2, the mass of vibration sensor 1 does not exceed 20g, the mass of vibration sensor fixture 3 is about 10g made of stainless steel, and the mass of vibration sensor component is the sum of the mass of vibration sensor 1 and vibration sensor fixture 3, which does not exceed 30g. Substituting into the formula , The above example shows that only , that is, to ensure that the vibration sensor component is always in contact with the object 7 being measured. Figure 4 ,exist and Guarantee When the vibration of the non-magnetic surface of the product is detected in batches, the mechanism and method provided by the present invention are very close to the magnetic attraction measurement results of the magnetic product below 6300 Hz, thus proving that the measurement results of the present invention are effective and stable.

Claims

1. A mechanism for online batch detection of non-magnetic surface vibration of products, characterized in that :The mechanism includes a vibration sensor, a vibration sensor fixture, a damping elastic element, a connecting assembly and a cylinder assembly; one end of the damping elastic element is fixedly connected to the vibration sensor fixture, and the other end is fixedly connected to the cylinder assembly through the connecting assembly; the vibration sensor fixture is fixedly connected to the vibration sensor.

2. The mechanism for online batch detection of non-magnetic surface vibration of products according to claim 1, characterized in that: The central axes of the vibration sensor, the vibration sensor fixture, the damping elastic element and the cylinder assembly are all on the same straight line during operation.

3. The mechanism for online batch detection of non-magnetic surface vibration of products according to claim 1, characterized in that: The damping elastic element is an elastic structure or material with damping.

4. The mechanism for online batch detection of non-magnetic surface vibration of products according to claim 1, characterized in that: The overall shape of the vibration sensor fixture includes but is not limited to a cylindrical shape; the top of the vibration sensor fixture is provided with a slot matching the vibration sensor, and the slot is surrounded by but is not limited to 4 set screws.

5. The mechanism for online batch detection of non-magnetic surface vibration of products according to claim 1, characterized in that: The vibration sensor and the vibration sensor fixture form a vibration sensor component without relative movement between them.

6. A method for online batch detection of non-magnetic surface vibration of products, characterized in that: The vibration sensor contacts the vibrating surface of the object to be measured and moves along with the vibrating surface of the object to be measured. During the entire measurement process, the vibration sensor always keeps in contact with the vibrating surface of the object to be measured.

7. The method for online batch detection of non-magnetic surface vibration of products according to claim 5, characterized in that: During the measurement process, the cylinder assembly, pushed by air pressure, drives the vibration sensor to approach and contact the vibrating surface of the object to be measured, and makes the object to be measured bear a certain pressure. The damping elastic element can not only reduce the impact generated when the vibration sensor contacts the object to be measured, but also ensure the deformation space of the reciprocating vibration of the object to be measured. It can adapt to the pressure of the piston inside the cylinder assembly to ensure that the vibration sensor can move with the vibrating surface of the object to be measured without separating from the vibrating surface of the object to be measured.

8. The method for online batch detection of non-magnetic surface vibration of products according to claim 5, characterized in that: The device drives the vibration sensor to contact or separate from the object to be tested through the movement of the piston inside the cylinder assembly. When the vibration sensor contacts the object to be tested, the piston inside the cylinder assembly should be in the middle position of the cylinder. During the test, the cylinder always maintains pressure, and the vibration structural deformation of the object to be tested caused by the pressure should be less than the allowable value.

9. The method for online batch detection of non-magnetic surface vibration of products according to claim 5, characterized in that: Assume that the mass of the vibration sensor component is M. Under the action of compressed air, the cylinder piston is subjected to air pressure, which is transmitted along the guide rod, through the damping elastic element, and transmitted to the vibration sensor component. Assume that the magnitude of the pressure on the vibration sensor component is F. The maximum vibration acceleration of the object to be measured is The end face of the acceleration sensor nut is the bottom face, and the bottom face is in contact with the surface of the object to be measured, so the vibration acceleration at the contact point can be tested. The condition to ensure that the vibration sensor component is always in contact with the object to be measured is , the acceleration sensor itself has no installation direction restrictions.

10. The method for online batch detection of non-magnetic surface vibration of products according to claim 5, characterized in that: The distance between the damping elastic element and the object to be measured is adjusted. During the entire process of the vibration sensor component contacting the object to be measured, the damping elastic element should be kept in a compressed state, but should not be compressed to an extreme position.

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