Testing device and testing method for simulating movement of metal particles in oil

Abstract

The invention belongs to the technical field of oil metal particle detection, and provides a testing device for simulating movement of metal particles in oil, which comprises an adjusting mechanism, a transmission belt, a driving wheel, an elastic coupling, a driving motor, a driven wheel, a tensioning wheel and a metal filing detection sensor, clamping plates on the two sides in the adjusting mechanism adjust the distance according to the type of the metal filing detection sensor and conduct self-adaptive clamping, a transmission belt penetrates through an inner center hole of the metal filing detection sensor, a driving motor is connected with a driving wheel through an elastic coupler, and a driven wheel is in meshing transmission with the driving wheel through the transmission belt. The invention also provides a test method for simulating the motion of the metal particles in the oil, so that the metal particles on the transmission belt simulate the motion trail of the chip particles in the oil, and the relation between the motion speed of the metal particles and the signal of the metal chip detection sensor is calculated. And the change curve of the induced magnetic field intensity of the metal particles is compensated and corrected, so that the detection rate of the metal particles by the metal filing detection sensor is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil metal particle detection, and in particular relates to a testing device and a testing method for simulating the movement of metal particles in oil. Background Art

[0002] In the field of machinery, the wear of moving parts often affects the life of mechanical equipment. Real-time monitoring of the wear status of moving parts and conducting equipment health assessment are important means to increase the life of equipment. The oil metal chip detection sensor can indirectly judge the degree of wear of moving parts by real-time detection of worn metal chips in the oil, providing an important basis for equipment life prediction and fault diagnosis, and the correctness of maintenance decisions. The oil metal chip detection sensor is installed near the key components of the equipment. By real-time detection of the number and size of metal particles appearing in the oil per unit time, the working status of the moving parts is evaluated, the health prediction of the equipment is carried out, the reliability of the equipment components is improved, and the life of the equipment is increased. Moreover, the outstanding features of the oil metal chip sensor are small size, fast response, high measurement accuracy, and the flow rate can reach 0-15m / s in different pipe diameter ranges. It can achieve the measurement of tiny particle sizes and weighs less than 10kg.

[0003] Since the damage of moving parts is a process of gradual wear and tear after a long working cycle, the detection accuracy of oil metal chip sensors is the core parameter for evaluating the accuracy of equipment fault diagnosis. The oil metal chip sensor can achieve high-resolution recognition of tiny particle metal chips under different pipe diameters. Therefore, it has high requirements for the detection sensitivity of weak magnetic signals and the identification of disturbance characteristics. It is necessary to analyze different particle sizes, different flow rates, and different positions, and to fit and correct the measurement parameters.

[0004] The existing test method is to install the particles on a fixed carrier, simulate the linear motion of the fluid, and quickly pull the carrier at a certain speed manually or with a linear motion device to make the particles quickly pass through the sensor pipeline. The particle size and other information of the particles are calculated through the sensor signal processing unit. The manual motion method cannot fit the movement trajectory of the particles in the oil, and it is impossible to carry out targeted test accuracy research; the oil metal chip detection sensor is suitable for a wide range of flow rates, with a maximum flow rate of 15m / s and higher, and uses a linear motion mechanism to simulate the movement trajectory of particles in the oil.

[0005] The linear motion mechanism has a high dynamic response and can achieve high-speed simulation, but it has the disadvantages of long linear motion distance, large floor space, need to install a foundation, and inconvenient to move. When simulating the high-speed movement of particles, if the linear motion mechanism has a runaway phenomenon, it will cause safety hazards to the tested products, equipment and personnel. Therefore, both conventional methods have limitations on improving the test performance of sensors, restricting the promotion and application of this type of sensor in vehicles, aircraft, ships, large machinery and other fields. Therefore, it is necessary to propose a test device and test method for simulating the movement of metal particles in oil. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a testing device for simulating the movement of metal particles in oil. The device adopts the periodic rotational motion of the pulley and the transmission belt so that the metal particles on the transmission belt simulate the movement trajectory of the wear particles in the oil and simulates the movement state curve of the metal particles. The key parameters such as position, speed, and particle distribution are obtained by the metal chip detection sensor. The device can compensate and correct the change curve of the induced magnetic field intensity of the metal particles according to the relationship between the movement speed of the metal particles and the signal solution of the metal chip detection sensor, thereby improving the detection rate of the metal particles by the metal chip detection sensor.

[0007] The present invention provides a testing device for simulating the movement of metal particles in oil, which comprises an adjustment mechanism, a transmission belt, a driving wheel, an elastic coupling, a driving motor, a driven wheel, a tensioning wheel and a metal chip detection sensor, wherein the adjustment mechanism is arranged on a sensor bracket, the metal chip detection sensor is fixed by clamping plates at both ends of the adjustment mechanism, the clamping plates on both sides of the adjustment mechanism adjust the spacing and clamp adaptively according to the type of the metal chip detection sensor, the transmission belt is passed through the inner center hole of the metal chip detection sensor, the driving wheel shaft is rotatably arranged on the driving wheel bracket through a bearing, the output shaft of the driving motor is connected to the driving wheel shaft through the elastic coupling, the driven wheel is meshed with the driving wheel through the transmission belt for transmission, the driven wheel is rotatably arranged on the bearing frame through a bearing, and the bearing frame is arranged on the driven wheel. The tensioning wheel is on a wheel bracket, the tensioning wheel is located on a side surface of the transmission belt and fits with the outer side of the transmission belt to adjust the tightness of the transmission belt, and the tensioning wheel is arranged on the tensioning wheel bracket, and the metal particles are inlaid on the surface of the transmission belt, so that the metal particles on the transmission belt simulate the movement trajectory of the wear particles in the oil, simulate the movement state curve of the metal particles, and obtain the position, speed and particle distribution information of the metal particles reflecting the oil wear through the metal chip detection sensor; the transmission belts are connected by a docking assembly, and the docking assembly includes a docking clamp, a first pressure plate, a docking belt and a second pressure plate, the first pressure plate fixes the transmission belt to the docking clamp by screws, the transmission belt between the docking belt and the first pressure plate is bonded, and the docking belt is pressed and fixed to the transmission belt by the second pressure plate;

[0008] The pulley and the transmission belt are used to rotate periodically, so that the particles on the transmission belt can be restored to the distribution law of particles in the crude oil, and a correlation model between the number of particles, particle size properties, distribution law and sensor detection rate is established: Among them, the relationship between the movement speed of metal particles and the signal solution of the metal chip detection sensor is:

[0009]

[0010] Wherein, K is the ratio of the induced magnetic field intensity generated by the movement of metal particles to the inherent theoretical magnetic field intensity of metal particles, β is a coefficient related to the metal chip detection sensor and is a constant, f is the excitation frequency of the metal chip detection sensor, and v is the movement speed of the metal particles;

[0011] According to the relationship between the moving speed of metal particles and the signal solution of the metal chip detection sensor, the variation curve of the induced magnetic field intensity of the metal particles is compensated and corrected, thereby improving the detection rate of the metal chip detection sensor for metal particles.

[0012] Preferably, the transmission belt is an open toothed transmission belt, and an annular transmission belt is formed by the connecting assembly.

[0013] Preferably, it also includes a data processing controller electrically connected to the metal chip detection sensor, the data processing controller includes a display and control module, a control module, a motor control module and a data processing and analysis module; the display and control module displays the position information of the waveform in real time to detect the overlap between the position waveforms of the metal particles.

[0014] Preferably, the control module comprises power on, power off and speed manual knobs to realize power on and power off and adjust the rotation speed of the transmission belt.

[0015] Preferably, the data processing and analysis module adopts bus communication, obtains test data through the metal chip detection sensor, displays the particle movement state and the measured particle parameters in real time through the control software, detects whether the metal chip detection sensor misses detection or makes false detection, interprets the size of particles under different movement states through the data processing and analysis module, and optimizes the sensor detection accuracy through the algorithm.

[0016] Preferably, the motor control module encodes the incremental pulses of the grating ruler position measurement and solves to form feedback digital parameters, has an adaptive parameter calibration function, the motion characteristic parameters can be limited by software, and the trajectory forming and digital filtering algorithms are implemented by the DSP software in the motor control module.

[0017] In a second aspect, the present invention further provides a testing method for a testing device for simulating the movement of metal particles in oil, comprising the following steps:

[0018] S1. Cutting and cleaning of the transmission belt. Cut the ends of the transmission belt into oblique cuts with a cutter. Clean the joints of the transmission belt with alcohol. Grind the glued surface of the joints to make them rough. Clean and dry them.

[0019] S2, pre-assembly and trimming, the transmission belt passes through the inner center hole of the metal chip detection sensor, and is meshed and connected with the driving wheel and the driven wheel on the bracket, and the length of the transmission belt is adjusted according to the demand. After trimming, the bevel cuts at both ends of the transmission belt can be butted in a shape-matched manner;

[0020] S3, transmission belt gluing, bonding the splicing belt to the transmission belt;

[0021] S4. Curing and molding: remove the excess colloid squeezed out during bonding, remove the pressing plate and clamps after curing for 1 hour, check that the connection at the cut of the tooth surface of the transmission belt is smooth, the splicing belt is bonded smoothly, there is no warping at both ends, the edge is aligned with the transmission belt without protrusions, and there is no cracking or deformation when gently pulled with appropriate force.

[0022] S5. Assembly: The annular transmission belt obtained after curing and molding is used in conjunction with the pulley. Before use, the wheelbase position of the driven wheel is fine-tuned to tighten the transmission belt and fix the driven wheel bracket. The position of the metal chip detection sensor is adjusted through the adjustment mechanism so that the transmission belt is located at the central axis position of the inner hole of the metal chip detection sensor, and the transmission belt is driven to move under the drive of the driving wheel;

[0023] S6. Make the metal particles on the transmission belt simulate the movement trajectory of the wear particles in the oil, simulate the metal particle movement state curve, and obtain the position, speed and particle distribution information of the metal particles reflecting the oil wear through the metal chip detection sensor.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The test device of the present invention simulates the movement of metal particles in oil, and adopts the movement mode of periodic rotation of the pulley and the transmission belt, so that the particles on the transmission belt accurately simulate the movement trajectory of the particles in the fluid, and obtains key parameters such as position, speed, and particle distribution through the metal chip detection sensor, thereby providing a basis for improving the sensor to further analyze the change law of particle disturbance and improve the test accuracy.

[0026] 2. The test device of the present invention for simulating the movement of metal particles in oil adopts a controller closed-loop control so that the transmission belt can operate stably and achieve adjustable speed. It has the advantages of simple structure, easy installation, small size, light weight, etc. and is suitable for portable measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the testing device for simulating the movement of metal particles in oil according to the present invention;

[0028] Figure 2 It is a schematic diagram of the transmission belt connection assembly in the present invention;

[0029] Figure 3 It is a cross-sectional view of the cooperation between the driving wheel and the driven wheel in the present invention;

[0030] Figure 4 This is a schematic diagram of the motion trajectory interface of the display and control module in the present invention;

[0031] Figure 5 is the original curve graph of metal particles detected in the present invention;

[0032] Figure 6 Schematic diagram of the trapezoidal velocity motion trajectory of metal particles in the present invention.

[0033] Main reference numerals:

[0034] Sensor bracket 1, adjustment mechanism 2, transmission belt 3, driving wheel 4, elastic coupling 5, driving motor 6, driven wheel 7, driven wheel bracket 8, tensioning wheel 9, tensioning wheel bracket 10, bearing bracket 14, driving wheel bracket 17, metal chip detection sensor 18, docking clamp 19, first pressure plate 20, docking belt 21. DETAILED DESCRIPTION

[0035] In order to fully describe the technical content, structural features, objectives and effects of the present invention, the following will be described in detail with reference to the accompanying drawings.

[0036] The test device of the present invention for simulating the movement of metal particles in oil is as follows: Figure 1 and Figure 3 As shown, it includes an adjustment mechanism 2, a transmission belt 3, a driving wheel 4, an elastic coupling 5, a driving motor 6, a driven wheel 7, a tensioning wheel 9 and a metal chip detection sensor 18. The adjustment mechanism 2 is arranged on a sensor bracket 1. The metal chip detection sensor 18 is fixed by clamping plates at both ends of the adjustment mechanism 2. The clamping plates on both sides of the adjustment mechanism 2 adjust the spacing and clamp adaptively according to the type of the metal chip detection sensor 18. The transmission belt 3 is passed through the inner center hole of the metal chip detection sensor 18. The driving wheel 4 shaft is rotatably arranged on the driving wheel bracket 17 through a bearing. The output shaft of the driving motor 6 is connected to the driving wheel 4 shaft through the elastic coupling 5. The driven wheel 7 is connected with the driving wheel 4 through the transmission belt 3, and the driven wheel 7 is rotatably arranged on the bearing frame 14 through the bearing. The bearing frame 14 is arranged on the driven wheel bracket 8. The tensioning wheel 9 is located on one side of the transmission belt 3 and fits with the outer side of the transmission belt 3 to adjust the tightness of the transmission belt 3. The tensioning wheel 9 is arranged on the tensioning wheel bracket 10. Metal particles are inlaid on the surface of the transmission belt 3 so that the metal particles on the transmission belt 3 simulate the movement trajectory of the abrasive particles in the oil and simulate the movement state curve of the metal particles. The position, velocity and particle distribution information of the metal particles reflecting the oil abrasive particles are obtained through the metal chip detection sensor 18.

[0037] like Figure 2 As shown, the transmission belt 3 is a toothed transmission belt, preferably a toothed transmission belt with an opening of a non-metallic wire core, which is connected to form an annular transmission belt, and metal particles are inlaid on the surface of the transmission belt 3. The transmission belts 3 are connected by a connecting assembly, and the connecting assembly includes a connecting clamp 19, a first pressure plate 20, a connecting belt 21 and a second pressure plate 22. The first pressure plate 20 fixes the transmission belt 3 on the connecting clamp 19 by screws, and the connecting belt 21 is bonded to the transmission belt 3 between the first pressure plate 20, and the connecting belt 21 is pressed and fixed to the transmission belt 3 by the second pressure plate 22.

[0038] like Figure 4As shown, the data processing controller is electrically connected to the metal chip detection sensor 18, and the data processing controller includes a display control module, a control module, a motor control module and a data processing analysis module; the position information of the waveform is displayed in real time by the display control module, and the overlap between the position waveforms of the metal particles is detected. The control module includes power-on, power-off and speed manual knobs to achieve power-on and power-off, and adjust the rotation rate of the transmission belt 3. The data processing and analysis module adopts bus communication mode, obtains test data through the metal chip detection sensor 18, displays the particle motion state and the measured particle parameters in real time through the control software, detects whether the metal chip detection sensor 18 misses detection, false detection, and interprets the particle size under different motion states through the data processing and analysis module, and optimizes the sensor detection accuracy through the algorithm; the motor control module encodes the incremental pulse of the grating ruler position measurement, and solves to form feedback digital parameters, has adaptive parameter calibration function, and the motion characteristic parameters can be limited by software, and the trajectory shaping and digital filtering algorithms are realized by the DSP software in the motor control module.

[0039] like Figure 5 As shown, the pulley and the transmission belt 3 are rotated periodically to make the particles on the transmission belt 3 follow the distribution law of particles in the crude oil, and establish a correlation model between the number of particles, particle size properties, distribution law and sensor detection rate: Among them, the relationship between the movement speed of metal particles and the signal solution of the metal chip detection sensor 18 is:

[0040]

[0041] Wherein, K is the ratio of the induced magnetic field intensity generated by the movement of metal particles to the inherent theoretical magnetic field intensity of metal particles, β is a coefficient related to the metal chip detection sensor and is a constant, f is the excitation frequency of the metal chip detection sensor, and v is the movement speed of the metal particles;

[0042] According to the relationship between the moving speed of metal particles and the signal solution of the metal chip detection sensor 18, the variation curve of the induced magnetic field intensity of the metal particles is compensated and corrected, thereby improving the detection rate of the metal chip detection sensor 18 for metal particles.

[0043] In a second aspect, the present invention provides a testing method for a device for simulating the movement of metal particles in oil, comprising the following steps:

[0044] S1, cutting and cleaning of the transmission belt 3, cutting the end of the transmission belt 3 into an oblique cut with a cutter, cleaning the connection of the transmission belt 3 with alcohol, grinding and roughening the glued surface of the connection belt 21, and drying after cleaning;

[0045] S2, pre-assembly and trimming, the transmission belt 3 passes through the inner center hole of the metal chip detection sensor 18, and is meshed and connected with the driving wheel 4 and the driven wheel 7 on the bracket, and the length of the transmission belt 3 is adjusted according to the demand. After trimming, the bevel cuts at both ends of the transmission belt 3 can be butted in a shape-matched manner;

[0046] S3, gluing the transmission belt 3, gluing the connecting belt 21 to the transmission belt 3;

[0047] S4, curing and molding: remove the excess colloid squeezed out during bonding, remove the pressing plate and fixture after curing for 1 hour, check that the connection at the tooth surface cut of the transmission belt 3 is smooth, the splicing belt 21 is bonded smoothly, there is no warping at both ends, the edge is aligned with the transmission belt 3 without protrusions, and there is no cracking or deformation when gently pulled with appropriate force.

[0048] S5. Assembly: The annular transmission belt 3 obtained after curing and molding is used in conjunction with the pulley. Before use, the wheelbase position of the driven wheel 7 is finely adjusted to tighten the transmission belt 3 and fix the driven wheel bracket 8. The position of the metal chip detection sensor 18 is adjusted by the adjustment mechanism 2 so that the transmission belt 3 is located at the central axis position of the inner hole of the metal chip detection sensor 18. The driving wheel 4 drives the transmission belt 3 to move.

[0049] S6. Make the metal particles on the transmission belt 3 simulate the motion trajectory of the wear particles in the oil, simulate the motion state curve of the metal particles, and obtain the position, speed and particle distribution information of the metal particles reflecting the oil wear through the metal chip detection sensor 18.

[0050] The following is a further description of the test method of the test device for simulating the movement of metal particles in oil according to the present invention in conjunction with the embodiments:

[0051] The connection of the transmission belt 3 is completed by using a connection tool, including the following steps:

[0052] S1, the transmission belt is fixed on the stand by the docking fixture 19, and the back of the transmission belt 3 faces outward;

[0053] S2, fix the transmission belt 3 on one side of the cutout to the fixture 19 with the first pressing plate 20, and fix it to the first pressing plate 20 with screws, and fix the transmission belt on the second side with the connecting pressing plate 20 and align the cutout;

[0054] S3, apply a proper amount of glue on the cutout gap of the transmission belt and on the back of the splicing belt 21, align the glued splicing belt 21 with the cutout position and lightly press and bond it to the transmission belt 3, so that its position is centered and the edges are aligned;

[0055] S4. Use the second pressing plate 22 to cover the docking belt 21, and the two ends of the docking belt 21 are covered by the second pressing plate 22, and the screws are used to gradually and symmetrically and balancedly apply pressure to tighten the docking belt and the transmission belt.

[0056] Several sets of experiments were conducted, and the data of metal particle motion trajectory were obtained as shown in Table 1.

[0057] Table 1 Metal particle motion trajectory and test data of detected particles

[0058]

[0059]

[0060] Table 2 Metal particle motion trajectory test data

[0061]

[0062] like Figure 6 As shown, the position movement mode of the transmission belt 3 is:

[0063] The trajectory acceleration / deceleration rate (motion acceleration / deceleration amplitude) is: a (fixed by the program); the uniform speed segment rate is V C ; The motion process time is t3; The time intervals of acceleration, average speed and deceleration are Δt1=t1-t0, Δt2=t2-t1, Δt3=t3-t2; The acceleration / deceleration motion stroke L a / d , average speed travel L c , full range of motion L s , the length of one circle is determined as L, and the number of circles is Q = L s / L.

[0064] Through analysis and calculation, the specific results are:

[0065]

[0066] Q=L s / L

[0067] The test device for simulating the movement of metal particles in oil of the present invention adopts the periodic rotational movement of the pulley and the transmission belt 3, so that the metal particles on the transmission belt 3 simulate the movement trajectory of the wear particles in the oil, simulate the movement state curve of the metal particles, and obtain key parameters such as position, speed, and particle distribution through the metal chip detection sensor 18. According to the relationship between the movement speed of the metal particles and the signal solution of the metal chip detection sensor 18, the induced magnetic field intensity change curve of the metal particles can be compensated and corrected, thereby improving the detection rate of the metal particles by the metal chip detection sensor 18.

[0068] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A test device for simulating the movement of metal particles in oil, characterized in that: It includes an adjustment mechanism, a transmission belt, a driving wheel, a driving motor, a driven wheel, a tensioning wheel and a metal chip detection sensor. The adjustment mechanism is arranged on the sensor bracket, the metal chip detection sensor is fixed by the clamping plates at the two ends of the adjustment mechanism, the clamping plates at both sides of the adjustment mechanism adjust the spacing and clamp adaptively according to the type of the metal chip detection sensor, the transmission belt is passed through the inner center hole of the metal chip detection sensor, the driving wheel shaft is rotatably arranged on the driving wheel bracket through a bearing, the output shaft of the driving motor is connected to the driving wheel shaft through an elastic coupling, the driven wheel is meshed and transmitted with the driving wheel through the transmission belt, the driven wheel is rotatably arranged on the bearing frame through a bearing, the bearing frame is arranged on the driven wheel bracket, the tensioning wheel is located on one side of the transmission belt and fits with the outer side of the transmission belt to adjust the tightness of the transmission belt, and the tensioning wheel is arranged on the tensioning wheel bracket, the metal particles are inlaid on the surface of the transmission belt, so that the metal particles on the transmission belt simulate the movement trajectory of the wear particles in the oil, simulate the movement state curve of the metal particles, and obtain the position, speed and particle distribution information of the metal particles reflecting the oil wear through the metal chip detection sensor; The transmission belts are connected by a docking assembly, and the docking assembly includes a docking fixture, a first pressing plate, a docking belt, and a second pressing plate. The first pressing plate fixes the transmission belt to the docking fixture by screws, and the connecting belt is bonded to the transmission belt between the first pressing plate, and the connecting belt is pressed and fixed to the transmission belt by the second pressing plate; The pulley and the transmission belt are used to rotate periodically, so that the particles on the transmission belt can be restored to the distribution law of particles in the crude oil, and a correlation model between the number of particles, particle size properties, distribution law and sensor detection rate is established: The relationship between the speed of metal particles and the signal resolution of the metal chip detection sensor is: Wherein, K is the ratio of the induced magnetic field intensity generated by the movement of metal particles to the inherent theoretical magnetic field intensity of metal particles, β is a coefficient related to the metal chip detection sensor and is a constant, f is the excitation frequency of the metal chip detection sensor, and v is the movement speed of the metal particles; According to the relationship between the moving speed of metal particles and the signal solution of the metal chip detection sensor, the variation curve of the induced magnetic field intensity of the metal particles is compensated and corrected, thereby improving the detection rate of the metal chip detection sensor for metal particles.

2. The testing device for simulating the movement of metal particles in oil according to claim 1, characterized in that: The transmission belt is an open toothed transmission belt, and forms an annular transmission belt through the connecting assembly.

3. The testing device for simulating the movement of metal particles in oil according to claim 1, characterized in that: It also includes a data processing controller electrically connected to the metal chip detection sensor, the data processing controller includes a display and control module, a control module, a motor control module and a data processing and analysis module, and the display and control module displays the position information of the waveform in real time to detect the overlap between the position waveforms of the metal particles.

4. The testing device for simulating the movement of metal particles in oil according to claim 3, characterized in that: The control module includes power on, power off and speed manual knobs to realize power on and power off and adjust the rotation speed of the transmission belt.

5. The testing device for simulating the movement of metal particles in oil according to claim 3, characterized in that: The data processing and analysis module adopts bus communication, obtains test data through the metal chip detection sensor, displays the particle movement state and the measured particle parameters in real time through the control software, detects whether the metal chip detection sensor misses detection or false detection, interprets the size of particles under different movement states through the data processing and analysis module, and optimizes the sensor detection accuracy through the algorithm.

6. The testing device for simulating the movement of metal particles in oil according to claim 3, characterized in that: The motor control module encodes the incremental pulses of the grating ruler position measurement and solves to form feedback digital parameters. It has an adaptive parameter calibration function. The motion characteristic parameters can be limited by software. The trajectory shaping and digital filtering algorithms are implemented by the DSP software in the motor control module.

7. A testing method for a testing device for simulating the movement of metal particles in oil according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Cutting and cleaning of the transmission belt. Cut the two ends of the transmission belt into oblique cuts respectively, clean the connection of the transmission belt, grind the rubber surface of the connection belt to make it rough, clean and dry; S2, pre-assembly and trimming, the transmission belt passes through the inner center hole of the metal chip detection sensor, and is meshed and connected with the driving wheel and the driven wheel on the bracket, and the length of the transmission belt is adjusted according to the demand. After trimming, the bevel cuts at both ends of the transmission belt can be butted in a shape-matched manner; S3, transmission belt gluing, bonding the splicing belt to the transmission belt; S4, curing and molding: After curing for a certain period of time, remove the pressing plate and the clamp, check that the connection at the tooth surface of the transmission belt is flat, the splicing belt is bonded flat, and the edge is aligned with the transmission belt; S5. Assembly: The annular transmission belt obtained after curing and molding is used in conjunction with the pulley. Before use, the wheelbase position of the driven wheel is fine-tuned to tighten the transmission belt and fix the driven wheel bracket. The position of the metal chip detection sensor is adjusted through the adjustment mechanism so that the transmission belt is located at the central axis position of the inner hole of the metal chip detection sensor, and the transmission belt is driven to move under the drive of the driving wheel; S6. The metal particles on the transmission belt are made to simulate the movement of wear metal particles in the oil, and the position, velocity and particle distribution information of the metal particles reflecting the oil wear are obtained through the metal chip detection sensor.

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