Motor no-load and load test method

Abstract

The invention discloses a motor no-load and loading test method, which comprises the following steps of: installing a target product on a positioning carrying table, and providing a forward rotation or reverse rotation excitation signal for the target product; starting an audio acquisition assembly to detect noise, and abutting an accelerometer against the target product to detect vibration; controlling the accelerometer to stop vibration detection, and controlling the intermediate platform deck to be switched to a rigid connection state; the pushing assembly is controlled to abut against the first sliding table, and the second sliding table is driven to move through the sliding table driving mechanism, so that the torque sensor is connected with a rotating shaft of the target product; a hysteresis brake is driven by the third sliding table to be connected with the torque sensor, a preset load is provided through the hysteresis brake, and the hysteresis brake is installed on the third sliding table and located on the adjacent side of the torque sensor. The testing device can be switched between a no-load working condition and a loaded working condition, so that continuous testing of multiple functions can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of automated testing, and in particular to a method for testing a motor with no load and with load. Background Art

[0002] Electric motors (also known as motors) are common power equipment. With the development of technology, small electric motors are used more and more widely, and are commonly found in household appliances and 3C products. In order to ensure the production quality of electric motors, quality tests need to be carried out before they leave the factory. However, the test equipment of related technologies can perform fewer test items, the integration is not high, and the simulated working conditions of different test items are different. If multiple tests are to be carried out, multiple different devices are required to carry out collaborative testing. It takes time to transfer the target product between different devices, and it is difficult to continuously test multiple functions of the motor. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a motor no-load and load test method, which can switch between no-load working conditions and load working conditions to achieve continuous testing of multiple functions.

[0004] On the one hand, an embodiment of the present invention provides a motor no-load and load test method, which is applied to a motor test device, including: Mounting the target product on the positioning platform and providing a forward or reverse excitation signal to the target product, wherein the positioning platform is mounted on the intermediate platform, the intermediate platform is mounted on the first slide, and the intermediate platform is in a flexible connection state; Starting an audio collection component to detect noise, and placing an accelerometer against the target product to detect vibration, wherein the audio collection component and the accelerometer are both mounted on the peripheral side of the positioning platform; Controlling the accelerometer to stop vibration detection, and controlling the intermediate platform to switch to a rigid connection state; Controlling the push assembly to abut against the first slide, and driving the second slide to move through the slide drive mechanism, so that the torque sensor is connected to the rotating shaft of the target product, the slide drive mechanism is connected to the second slide, the second slide and the first slide are installed on the same slide rail, and the second slide and the push assembly are distributed on opposite sides of the first slide, and the torque sensor is installed on the second slide; The hysteresis brake is driven to be connected to the torque sensor through the third slide, and a preset load is provided through the hysteresis brake. The hysteresis brake is installed on the third slide and is located at a side adjacent to the torque sensor.

[0005] According to some embodiments of the present invention, the step of controlling the accelerometer to stop vibration detection and controlling the intermediate platform to switch to a rigid connection state further includes: A displacement sensor is abutted against the rotation axis of the target product to detect axis runout, and the displacement sensor is arranged on the peripheral side of the positioning stage.

[0006] According to some embodiments of the present invention, the method of driving the hysteresis brake to connect with the torque sensor through the third slide and providing a preset load through the hysteresis brake may also include: The torque is detected by the torque sensor, and / or the rotation speed is detected by a photoelectric sensor and a code disc; the code disc is connected to the torque sensor, and the photoelectric sensor is arranged on the adjacent side of the code disc and facing the code disc.

[0007] According to some embodiments of the present invention, the method further comprises: driving the hysteresis brake to connect with the torque sensor through the third slide, and providing a preset load through the hysteresis brake. Controlling the intermediate platform to switch to a flexible connection state; The target product is started and vibration detection is performed on the target product through the accelerometer.

[0008] According to some embodiments of the present invention, the intermediate platform comprises a bottom plate, a carrier plate, a shock absorbing member and at least two clamping members, the bottom plate is connected to the first slide platform, and the carrier plate is connected to the positioning platform; The controlling the intermediate platform to switch to a rigid connection state comprises: controlling the at least two clamping members to abut against the side of the carrier plate; The controlling the intermediate platform to switch to the flexible connection state includes: controlling the at least two clamping members to separate from the carrier plate.

[0009] On the other hand, an embodiment of the present invention provides a motor no-load and load test method, which is applied to a motor test device, comprising: Mounting the target product on the positioning platform and providing a forward or reverse excitation signal to the target product, wherein the positioning platform is mounted on the intermediate platform, the intermediate platform is mounted on the first slide, and the intermediate platform is in a rigid connection state; Controlling the push assembly to abut against the first slide, and driving the second slide to move through the slide drive mechanism, so that the torque sensor is connected to the rotating shaft of the target product, the slide drive mechanism is connected to the second slide, the second slide and the first slide are installed on the same slide rail, and the second slide and the push assembly are distributed on opposite sides of the first slide, the torque sensor is installed on the second slide and connected to a hysteresis brake, and the hysteresis brake provides a preset load; Start the audio acquisition component to detect noise; Controlling the intermediate platform to switch to a flexible connection state, and placing an accelerometer against the target product to detect vibration, wherein the audio collection component and the accelerometer are both mounted on the peripheral side of the positioning platform; The hysteresis brake is driven to disengage from the torque sensor through the third slide, and the noise detection and vibration detection are maintained, and the hysteresis brake is mounted on the third slide.

[0010] According to some embodiments of the present invention, the controlling the intermediate platform to switch to a flexible connection state further includes: The torque is detected by the torque sensor, and / or the rotation speed is detected by a photoelectric sensor and a code disc; the code disc is connected to the torque sensor, and the photoelectric sensor is arranged on the adjacent side of the code disc and facing the code disc.

[0011] According to some embodiments of the present invention, the controlling the intermediate platform to switch to a flexible connection state further includes: A displacement sensor is abutted against the rotation axis of the target product to detect axis runout, and the displacement sensor is arranged on the peripheral side of the positioning stage.

[0012] According to some embodiments of the present invention, the method of driving the hysteresis brake to disengage from the torque sensor through the third slide and maintaining noise detection and vibration detection further comprises: Controlling the accelerometer to stop vibration detection, and controlling the intermediate platform to switch to a rigid connection state; Maintain noise detection; At least one of torque detection, rotation speed detection and shaft runout detection is maintained.

[0013] According to some embodiments of the present invention, the method of driving the hysteresis brake to disengage from the torque sensor through the third slide and maintaining noise detection and vibration detection further comprises: Controlling the accelerometer to stop vibration detection, and controlling the intermediate platform to switch to a rigid connection state; driving the second slide table to move by the slide table driving mechanism so that the torque sensor is separated from the rotating shaft of the target product; Noise detection is maintained and shaft runout detection is performed by means of the displacement sensor.

[0014] The embodiments of the present invention have at least the following beneficial effects: The audio acquisition component can be used to continuously detect noise during the test process. The intermediate platform can switch between flexible connection and rigid connection to meet the test conditions under different working conditions. The slide drive mechanism drives the second slide to move and the third slide drives the hysteresis brake to move to achieve switching between no-load and loaded conditions. During the test, data can be collected through the audio acquisition component and the accelerometer, which can continuously detect multiple functions of the motor.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 This is a flowchart of the steps of the motor no-load and load testing method according to an embodiment of the present invention; Figure 2 This is one of the structural schematic diagrams of the motor testing equipment according to an embodiment of the present invention; Figure 3 This is a second structural schematic diagram of the motor testing equipment according to an embodiment of the present invention; Figure 4 This is a third structural schematic diagram of the motor testing equipment according to an embodiment of the present invention; Figure 5 for Figure 2 The schematic diagram of the structure of the intermediate platform and the positioning platform of the motor testing equipment shown; Figure 6 for Figure 5 The exploded structure diagram of the intermediate platform and the positioning platform is shown; Figure 7 This is the second step flow chart of the motor no-load and load testing method according to an embodiment of the present invention.

[0017] Reference numerals: Base 100, first slide rail 110, push assembly 120, first slide 210, second slide 220, slide drive mechanism 221, intermediate platform 300, bottom plate 310, carrier plate 320, second wedge surface 321, shock absorber 330, clamping member 340, first wedge surface 341, positioning platform 400, positioning block 410, positioning cavity 411, avoidance position 412, first clamping block 420, second clamping block 430, bidirectional cylinder 440, audio collection assembly 610, accelerometer 620, lifting and rotating mechanism 621, displacement sensor 630, second lifting drive member 631, torque sensor 700, hysteresis brake 710, third slide 711, code disc 720, photoelectric sensor 730. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In the description of the present invention, "several" means one or more, "multiple" means more than two, greater than, less than, and exceeding are understood as not including the number itself, and "above", "below", and "within" are understood as including the number itself. If there is a description of "first", "second", etc., it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, words such as “setting”, “installation” and “connection” should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0022] Please refer to Figure 1 This embodiment discloses a motor no-load and load testing method, which is applied to a motor testing device. In order to facilitate understanding of the motor testing method of this embodiment, the structure of the motor testing device is described below.

[0023] Please refer to Figure 2 , Figure 3 and Figure 4 The motor testing device includes a first slide assembly and a second slide assembly installed on the same slide rail. For example, a first slide rail 110 is installed on the base 100, and the first slide assembly and the second slide assembly are both slidably installed on the first slide rail 110. For example, the first slide assembly includes a first slide 210, an intermediate platform 300 and a positioning platform 400, and the second slide assembly includes a second slide 220, a torque sensor 700, a hysteresis brake 710, a code disc 720 and a photoelectric sensor 730. The first slide 210 and the second slide 220 are both slidably installed on the first slide rail 110. Please refer to Figure 5 and Figure 6 The intermediate platform 300 is installed on the first slide 210. The intermediate platform 300 includes a bottom plate 310, a carrier plate 320, a shock absorber 330 and at least two clamping members 340. The bottom plate 310 is connected to the first slide 210. The shock absorber 330 is connected between the bottom plate 310 and the carrier plate 320. The shock absorber 330 can adopt structures such as urethane foam, shock-absorbing silicone or shock-absorbing springs. The clamping member 340 is a cylinder-driven structure. At least two clamping members 340 are installed on the bottom plate 310 and distributed on opposite sides of the carrier plate 320. The positioning platform 400 is installed on the carrier plate 320. The positioning platform 400 is used to carry the target product. A push assembly 120 is provided on the adjacent side of the first slide assembly. Specifically, the push assembly 120 is installed on the base 100 and is located on the adjacent side of the first slide 210. An audio collection component 610, an accelerometer 620 and a displacement sensor 630 are arranged on the surrounding side of the positioning platform 400. The audio collection component 610 uses a microphone. The second slide 220 is connected to a slide drive mechanism 221. The slide drive mechanism 221 uses a combination of a screw rod and a motor. The torque sensor 700 is installed on the second slide 220. The torque sensor 700 is connected to the hysteresis brake 710 and the code disk 720. The photoelectric sensor 730 is arranged on the adjacent side of the code disk 720, and the detection end of the photoelectric sensor 730 faces the code disk 720.

[0024] This embodiment takes small motors as target products, and the size of small motors is small. Correspondingly, the volume of the motor test equipment of this embodiment is also small. In order to meet the requirements of miniaturization design, the structural arrangement between the various components of the motor test equipment is compact. For example, the intermediate platform 300 and the positioning platform 400 are arranged on the first slide 210, and the torque sensor 700, the hysteresis brake 710, the code disc 720 and the photoelectric sensor 730 are arranged on the second slide 220, wherein the hysteresis brake 710 is installed on the third slide 711, and can be connected or disconnected from the torque sensor 700 under the drive of the third slide 711, and the push assembly 120, the audio collection assembly 610, the accelerometer 620 and the displacement sensor 630 are distributed around the first slide assembly, adopting a modular structural layout, with a clear and compact layout, high integration and easy debugging and maintenance.

[0025] The test items for small motors include no-load test and load test. Among them, in order to improve the accuracy of the test, some items need to reduce the interference of external environmental factors (such as vibration) as much as possible, while the remaining test items will exert a certain force on the target product during the test, requiring the target product to be placed stably. Based on this, an intermediate platform 300 is added between the first slide 210 and the positioning platform 400 of this embodiment. The intermediate platform 300 has two states of flexible connection and rigid connection, and can be freely switched according to the requirements of the test items during the test. For example, when the clamping member 340 does not abut the carrier 320, the carrier 320 is connected to the bottom plate 310 through the shock absorbing member 330. Since the shock absorbing member 330 has a shock absorbing effect, the vibration of the external environment transmitted through the first slide 210 can be isolated, thereby improving the accuracy of the test; when the clamping member 340 abuts against the side of the carrier 320, the carrier 320, the clamping member 340 and the bottom plate 310 form a rigid connection relationship, so that the connection between the carrier 320 and the bottom plate 310 is reliable, thereby improving the placement stability of the target product. It is worth mentioning that the clamping member 340 abuts against the side of the carrier 320 to clamp the carrier 320, which can prevent the carrier 320 from continuously applying pressure to the shock absorbing member 330 while clamping the carrier 320, reduce the fatigue of the shock absorbing member 330, and help improve the durability and shock absorbing reliability of the shock absorbing member 330. The number of the clamping members 340 may be determined according to actual application conditions, such as two or four, and each two clamping members 340 form a group, and respectively abut against the carrier plate 320 from opposite sides.

[0026] The motor no-load and load test method of this embodiment includes S110 to S150. It should be noted that the steps of this embodiment are numbered only for the convenience of review and understanding, and do not limit the execution order of the steps. The content of each step is described in detail below: S110, mounting the target product on the positioning platform 400, and providing a forward or reverse excitation signal to the target product, the intermediate platform 300 is in a flexible connection state, that is, the shock absorbing member 330 is connected between the bottom plate 310 and the carrier plate 320, and at least two clamping members 340 are separated from the carrier plate 320; For example, please refer to Figure 5 and Figure 6The positioning platform 400 includes a positioning block 410, a first clamping block 420 and a second clamping block 430. A positioning cavity 411 is provided in the middle of the positioning block 410. The positioning cavity 411 is used to place the target product. Avoidance positions 412 are provided on the opposite sides of the positioning block 410. The first positioning block 410 and the second positioning block 410 are movably installed in the avoidance positions 412 and are connected to a two-way cylinder 440. The two-way cylinder 440 is used to drive the first clamping block 420 and the second clamping block 430 to move toward or away from each other, thereby clamping or releasing the target product. Among them, setting an avoidance position 412 on the positioning block 410 can reduce the relative height of the first clamp block 420 and the second clamp block 430, which is conducive to realizing a miniaturized design. The first clamp block 420 and the second clamp block 430 are driven by the bidirectional cylinder 440, which can not only save the number of cylinders and meet the requirements of miniaturized design, but also reduce the pressure applied to the carrier plate 320, improve the shock absorption effect of the intermediate platform 300 to a certain extent, and improve the movement synchronization performance of the first clamp block 420 and the second clamp block 430, so that the target product can be maintained at the preset center position. Among them, the two-way cylinder 440 is installed at the bottom of the positioning block 410 and connected to the carrier plate 320. The two-way cylinder 440 is set between the positioning block 410 and the carrier plate 320. The positioning block 410 can be supported by the two-way cylinder 440, and the center of gravity of the two-way cylinder 440 and the positioning block 410 can be maintained on the same or similar longitudinal straight line, which is beneficial to ensure the uniformity of force on the carrier plate 320 at various positions, avoid excessive force on one side, and help improve the shock absorption effect.

[0027] In this step, a forward or reverse excitation signal can be provided to the target product to perform a forward test or a reverse test on the target product, wherein the test items for the forward test and the reverse test are the same and are not distinguished in this article. In the initial state, the intermediate carrier 300 is in a flexible connection state, that is, the shock absorber 330 is connected between the base plate 310 and the carrier plate 320, and at least two clamping members 340 are separated from the carrier plate 320 to facilitate vibration detection. In this state, the carrier plate 320 is connected to the base plate 310 through the shock absorber 330, which can isolate the interference of external vibration factors on the vibration test, which is conducive to improving the accuracy of the detection.

[0028] S120, starting the audio collection component 610 to detect noise, and placing the accelerometer 620 against the target product to detect vibration; Exemplarily, during the test, continuous noise detection is performed through the audio collection component 610. In order to improve the accuracy of the detection, the motor testing equipment also includes a soundproof box, and the first slide assembly and the second slide assembly are both installed in the soundproof box to reduce the interference of environmental noise. Figure 4The accelerometer 620 is connected to a lifting and rotating mechanism 621, which adopts a cylinder-driven structure. In some application examples, the lifting and rotating mechanism 621 is installed on the base 100, or, in other application examples, the lifting and rotating mechanism 621 is installed on the top plate of the soundproof box. The lifting and rotating mechanism 621 is used to drive the accelerometer 620 to switch between the first working position and the second working position. The first working position and the second working position are located at different height planes. The lifting and rotating mechanism 621 has two action logics of lifting and rotating. The lifting and rotating mechanism 621 drives the accelerometer 620 to rotate around the axis and descend to switch from the second working position to the first working position. The accelerometer 620 abuts against the target product at the first working position to detect vibration of the target product. The second working position of the accelerometer 620 is located above the adjacent side of the positioning platform 400, which can avoid the placement track of the target product, which is conducive to installing the target product on the positioning platform 400.

[0029] S130, controlling the accelerometer 620 to stop vibration detection, and controlling the intermediate platform 300 to switch to a rigid connection state, that is, abutting against the side of the carrier plate 320 through at least two clamping members 340; Exemplarily, after completing the vibration detection, the accelerometer 620 is controlled to stop signal collection, that is, the vibration detection is stopped. The side of the carrier plate 320 is abutted by at least two clamping members 340, so that the intermediate platform 300 is switched to a rigid connection state, that is, the carrier plate 320 is connected to the bottom plate 310 through the clamping members 340. Figure 5 and Figure 6 , the abutting end of the clamping member 340 is provided with a first wedge surface 341, and the side of the carrier 320 is provided with a second wedge surface 321, and the first wedge surface 341 and the second wedge surface 321 are movably abutted. During the test, the target product will continue to generate vibrations, and the vibrations will be transmitted to the carrier 320 through the positioning platform 400, so that the carrier 320 and the clamping member 340 have a tendency to move relative to each other. The first wedge surface 341 abuts against the second wedge surface 321, which can limit the movement of the carrier 320 in the longitudinal direction and the horizontal direction, thereby improving the connection reliability between the carrier 320 and the clamping member 340. Moreover, compared with machining matching structures such as positioning holes and positioning grooves on the carrier 320, the design of the second wedge surface 321 can avoid the gap between the clamping member 340 and the carrier 320 caused by machining errors, resulting in unstable abutment.

[0030] It is worth noting that the abutment direction of the clamping member 340 is from the side of the carrier 320 to the center of the carrier 320, that is, the clamping member 340 applies a horizontal abutment force to the side of the carrier 320, thereby clamping the carrier 320 to prevent the carrier 320 from continuously applying pressure to the shock absorber 330 in a rigid connection state, otherwise the shock absorber 330 is prone to fatigue and the shock absorption effect is reduced.

[0031] S140, controlling the push assembly 120 to abut against the first slide 210, and driving the second slide 220 to move through the slide drive mechanism 221, so that the torque sensor 700 is connected to the rotating shaft of the target product; Please refer to Figure 2 , Figure 3 and Figure 4 , the first slide 210 and the second slide 220 are both connected to the first slide rail 110, and the second slide 220 is driven to move by the slide drive mechanism 221, so that the second slide 220 moves in the direction close to the first slide 210, the target product is installed on the positioning platform 400, and the rotation axis of the target product points to the torque sensor 700, and the torque sensor 700 is installed on the second slide 220, and the second slide 220 drives the torque sensor 700 to move synchronously in the direction close to the first slide 210, so that the torque sensor 700 can be connected to the rotation axis of the target product. It is worth mentioning that the second slide 220 and the push assembly 120 are distributed on opposite sides of the first slide 210, and the push assembly 120 abuts against the first slide 210 to provide a reverse force for the first slide 210, which can prevent the second slide 220 from driving the first slide 210 to move in the same direction.

[0032] S150 , driving the hysteresis brake 710 to connect with the torque sensor 700 through the third slide 711 , and providing a preset load through the hysteresis brake 710 .

[0033] Exemplarily, the hysteresis brake 710 is a torque control component using the hysteresis principle. By using the hysteresis principle, a certain torque can be generated by controlling the input excitation current to provide different loads, such as light load and full load, to the target product. The third slide 711 drives the hysteresis brake 710 to move in a direction close to the torque sensor 700, so that the hysteresis brake 710 is connected to the torque sensor 700, and a preset load is provided to the target product through the torque sensor 700, thereby simulating the load-adding working condition of the target product.

[0034] In this way, the audio collection component 610 can be used to continuously detect noise during the test process. The intermediate platform 300 switches between flexible connection and rigid connection to meet the test conditions under different working conditions. The second slide 220 is driven to move by the slide drive mechanism 221 and the hysteresis brake 710 is driven to move by the third slide 711 to realize the switching between no-load and loaded working conditions. During the test, data can be collected through the audio collection component 610 and the accelerometer 620, and multiple functions of the motor can be continuously detected.

[0035] Step S130 , controlling the accelerometer 620 to stop vibration detection, and controlling the intermediate platform 300 to switch to a rigid connection state, and then also including: contacting the displacement sensor 630 against the rotating axis of the target product to detect the axis runout, and the displacement sensor 630 is arranged on the peripheral side of the positioning platform 400 .

[0036] For example, please refer to Figure 3 and Figure 4 , the displacement sensor 630 is connected to a second lifting drive 631. Considering the requirements of miniaturized design, the second lifting drive 631 is located above the positioning platform 400. For example, the motor testing equipment also includes a soundproof box. The first slide assembly and the second slide assembly are both installed in the soundproof box. The second lifting drive 631 is installed on the top of the soundproof box, which can save the layout space of the base 100, making the layout between the various mechanisms more compact and realizing miniaturized design. The second lifting drive 631 adopts a cylinder-driven structure to drive the displacement sensor 630 to perform lifting and lowering movements. For example, in the initial state, the displacement sensor 630 is located above the rotating shaft of the target product. When the shaft runout detection is required, the second lifting drive 631 drives the displacement sensor 630 to move downward so that the displacement sensor 630 abuts against the rotating shaft of the target product, thereby performing shaft runout detection on the target product through the displacement sensor 630.

[0037] Step S150, driving the hysteresis brake 710 to connect with the torque sensor 700 through the third slide 711, and providing a preset load through the hysteresis brake 710, before and / or after which it also includes: detecting the torque through the torque sensor 700, and / or detecting the rotation speed through the photoelectric sensor 730 and the code disk 720.

[0038] Exemplarily, before step S150, the no-load condition of the target product is simulated, and the torque of the target product under the no-load condition is detected by the torque sensor 700, and the speed of the target product under the no-load condition can be detected by the cooperation of the code disc 720 and the photoelectric sensor 730. Among them, the code disc 720 is installed on the torque sensor 700, and the target product drives the code disc 720 to rotate through the torque sensor 700. The code disc 720 is provided with light-transmitting parts and light-shielding parts arranged alternately. The code disc 720 triggers the detection signal of the photoelectric sensor 730 during the rotation process. According to the number of signal triggers of the photoelectric sensor 730 in a unit time, the speed of the target product can be determined. In actual applications, the test items can be selected according to actual needs, for example, the torque is detected by the torque sensor 700, or the speed is detected by the photoelectric sensor 730 and the code disc 720, or the torque is detected by the torque sensor 700, and the speed is also detected by the photoelectric sensor 730 and the code disc 720.

[0039] After step S150, the target product is simulated under the load condition. The torque sensor 700 is used to detect the torque of the target product under the load condition. The code disc 720 and the photoelectric sensor 730 are used to detect the speed of the target product under the load condition. The hysteresis brake 710 can adjust the load applied to the target workpiece according to the input current, thereby realizing the test under different load conditions such as light load and full load.

[0040] Step S150, driving the hysteresis brake 710 to connect with the torque sensor 700 through the third slide 711, and providing a preset load through the hysteresis brake 710, and then also including: controlling the intermediate platform 300 to switch to a flexible connection state; starting and performing vibration detection on the target product through the accelerometer 620.

[0041] Exemplarily, when vibration detection is performed on the target product under a simulated load condition, in order to improve the accuracy of the detection, at least two clamping members 340 are controlled to be separated from the carrier plate 320, so that the intermediate carrier 300 is switched to a flexible connection state, that is, the carrier plate 320 is connected to the bottom plate 310 through the shock absorber 330, and the shock absorber 330 isolates the vibration of the external environment. Since the accelerometer 620 always maintains contact with the target product, when the vibration detection of the simulated load condition is performed, the accelerometer 620 is started to collect signals to perform vibration detection on the target product. In the vibration detection process, the load output by the hysteresis brake 710 can be changed to achieve vibration detection under different load conditions.

[0042] The above embodiment is an embodiment of the motor test equipment starting from the no-load condition and then switching to the load condition test. The following also provides a motor no-load and load test method, which is an embodiment of the motor test equipment starting from the load condition and then switching to the no-load condition test. Among them, the structure of the motor test equipment can refer to the above, and will not be repeated here.

[0043] Please refer to Figure 7 The embodiment of the present invention provides a motor no-load and load test method, which is applied to a motor test device, including S210~S250. It should be noted that the steps in this embodiment are numbered only for the convenience of review and understanding, and do not limit the execution order of the steps. Figures 2 to 6 The contents of each step are described in detail: S210, mounting the target product on the positioning platform 400, and providing a forward or reverse excitation signal to the target product, with the intermediate platform 300 being in a rigid connection state; Exemplarily, different from the above application examples, before starting the test, the intermediate platform 300 is in a rigid connection state, that is, at least two clamps 340 abut against the side of the carrier plate 320, so that the carrier plate 320 is connected to the bottom plate 310 through the clamps 340. In the rigid connection state, the target product is placed stably to facilitate subsequent connection with the torque sensor 700.

[0044] S220, controlling the push assembly 120 to abut against the first slide 210, and driving the second slide 220 to move through the slide drive mechanism 221, so that the torque sensor 700 is connected to the rotating shaft of the target product, the torque sensor 700 is installed on the second slide 220 and is connected to the hysteresis brake 710, and the hysteresis brake 710 provides a preset load; Exemplarily, the first slide 210 and the second slide 220 are both connected to the first slide rail 110, and the second slide 220 is driven to move by the slide drive mechanism 221, so that the second slide 220 moves in the direction close to the first slide 210, the target product is installed on the positioning platform 400, and the rotation axis of the target product points to the torque sensor 700, and the torque sensor 700 is installed on the second slide 220, and the second slide 220 drives the torque sensor 700 to move synchronously in the direction close to the first slide 210, so that the torque sensor 700 can be connected to the rotation axis of the target product, and the hysteresis brake 710 provides a preset load greater than zero. It is worth mentioning that the second slide 220 and the push assembly 120 are distributed on opposite sides of the first slide 210, and the push assembly 120 abuts against the first slide 210 to provide a reverse force for the first slide 210, which can prevent the second slide 220 from driving the first slide 210 to move in the same direction.

[0045] S230, starting the audio collection component 610 to detect noise; Exemplarily, the audio collection component 610 is used to perform continuous noise detection on the target product during the test. In order to improve the accuracy of the detection, the motor testing equipment also includes a soundproof box, and the first slide assembly and the second slide assembly are both installed in the soundproof box to reduce the interference of environmental noise.

[0046] S240, controlling the intermediate platform 300 to switch to a flexible connection state, and placing the accelerometer 620 against the target product to detect vibration; Exemplarily, in order to reduce the influence of external environmental factors, the intermediate carrier 300 is controlled to switch to a flexible connection state, that is, the clamping member 340 is separated from the carrier plate 320, and the carrier plate 320 is connected to the bottom plate 310 through the shock absorbing member 330. The shock absorbing member 330 has a shock absorbing function and can isolate the external vibration transmitted through the first slide 210. In order to make full use of the layout space, the positioning carrier 400 is supported from the bottom side of the target product and clamped from both sides, and the accelerometer 620 is pressed down from the upper side of the target product. Among them, the installation method of the accelerometer 620 can refer to the above, and will not be repeated here.

[0047] S250 , driving the hysteresis brake 710 to disengage from the torque sensor 700 via the third slide 711 , and maintaining noise detection and vibration detection.

[0048] Exemplarily, the hysteresis brake 710 is mounted on the third slide 711, and the third slide 711 can drive the hysteresis brake 710 to move in a straight line direction to disengage the torque sensor 700, so that the target product is switched from a loaded working condition to a no-load working condition. During the switching process, noise detection and vibration detection are maintained, and continuous detection under different working conditions can be achieved.

[0049] In this way, the audio collection component 610 can be used to continuously detect noise during the test process. The intermediate platform 300 switches between flexible connection and rigid connection to meet the test conditions under different working conditions. The second slide 220 is driven to move by the slide drive mechanism 221 and the hysteresis brake 710 is driven to move by the third slide 711 to realize the switching between no-load and loaded working conditions. During the test, data can be collected through the audio collection component 610 and the accelerometer 620, and multiple functions of the motor can be continuously detected.

[0050] Step S240 , controlling the intermediate platform 300 to switch to a flexible connection state, which also includes: detecting the torque through the torque sensor 700 , and / or detecting the rotation speed through the photoelectric sensor 730 and the code disk 720 .

[0051] For example, in a load-adding condition simulating a target product, before the intermediate platform 300 switches the connection state and performs vibration detection, the torque sensor 700 performs torque detection on the target product under the load-adding condition, and the code disc 720 and the photoelectric sensor 730 cooperate to perform speed detection on the target product under the load-adding condition. Among them, the hysteresis brake 710 can adjust the load size applied to the target workpiece according to the size of the input current, thereby realizing tests under different load conditions such as light load and full load.

[0052] Step S240, controlling the intermediate stage 300 to switch to a flexible connection state, which also includes: placing the displacement sensor 630 against the rotation axis of the target product to detect the axis runout.

[0053] For example, the purpose of controlling the intermediate platform 300 to switch to a flexible state is to improve the accuracy of the detection during vibration detection. Before the vibration detection, the target product can also be tested for axial runout by the displacement sensor 630, wherein the installation method of the displacement sensor 630 can refer to the above, and will not be repeated here.

[0054] In some application examples, step S250, driving the hysteresis brake 710 to disengage from the torque sensor 700 through the third slide 711, and maintaining noise detection and vibration detection, then also includes: controlling the accelerometer 620 to stop vibration detection, and controlling the intermediate carrier 300 to switch to a rigid connection state; maintaining noise detection; and maintaining at least one of torque detection, speed detection and shaft runout detection.

[0055] Exemplarily, under simulated no-load conditions, when the vibration detection is completed, the accelerometer 620 is controlled to stop the vibration detection, so as to avoid collecting interference signals and affecting subsequent data analysis. The intermediate platform 300 is controlled to switch to a rigid connection state, that is, the clamping member 340 is controlled to abut the side of the carrier plate 320. During the test, the audio acquisition component 610 is used to maintain sound signal collection to maintain noise detection; thereafter, the corresponding test items can be selected according to actual test requirements, such as maintaining torque detection through a torque detection sensor, or maintaining speed detection through a code disc 720 and a photoelectric sensor 730, or maintaining shaft runout detection through a displacement sensor 630, or maintaining any two or all of torque detection, speed detection and shaft runout detection.

[0056] Alternatively, in some other application examples, step S250, driving the hysteresis brake 710 to disengage from the torque sensor 700 through the third slide 711, and maintaining noise detection and vibration detection, then further includes: Control the accelerometer 620 to stop vibration detection, and control the intermediate platform 300 to switch to a rigid connection state; drive the second slide 220 to move through the slide drive mechanism 221 to separate the torque sensor 700 from the rotating axis of the target product; maintain noise detection, and perform shaft runout detection through the displacement sensor 630.

[0057] Illustratively, the torque sensor 700 is separated from the rotating shaft of the target product, which can avoid the torque sensor 700 interfering with the rotation of the target product and can more closely simulate the no-load condition of the target product. At this time, noise detection is maintained through the audio acquisition component 610, and shaft deflection detection is maintained through the displacement sensor 630, which is conducive to improving the accuracy of detection.

[0058] This embodiment can automatically and continuously perform no-load tests and load tests on the target product. It has a high degree of automation and can perform multiple tests for different working conditions. During the test, there is no need to transfer the target product between different devices. The operation is simple, which saves transfer time and helps to improve test efficiency.

[0059] In addition, the motor test equipment of this embodiment is also provided with structures such as a radial thrust mechanism and a first pressure detection assembly to simulate different working conditions and realize continuous testing of multiple functions under different working conditions. However, considering that the functional testing of structures such as the radial thrust mechanism and the first pressure detection assembly is not the key solution of this embodiment, this embodiment will not be described in detail.

[0060] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A motor no-load and load test method, applied to motor testing equipment, characterized in that: include: Mounting a target product on a positioning platform (400) and providing a forward or reverse excitation signal to the target product, wherein the positioning platform (400) is mounted on an intermediate platform (300), the intermediate platform (300) is mounted on a first slide platform (210), and the intermediate platform (300) is in a flexible connection state; Starting the audio collection component (610) to detect noise, and placing the accelerometer (620) in contact with the target product to detect vibration, wherein the audio collection component (610) and the accelerometer (620) are both mounted on the peripheral side of the positioning platform (400); Controlling the accelerometer (620) to stop vibration detection, and controlling the intermediate platform (300) to switch to a rigid connection state; Controlling the push assembly (120) to abut against the first slide (210), and driving the second slide (220) to move through the slide drive mechanism (221), so that the torque sensor (700) is connected to the rotation axis of the target product, the slide drive mechanism (221) is connected to the second slide (220), the second slide (220) and the first slide (210) are installed on the same slide rail, and the second slide (220) and the push assembly (120) are distributed on opposite sides of the first slide (210), and the torque sensor (700) is installed on the second slide (220); The hysteresis brake (710) is driven to be connected to the torque sensor (700) via the third slide (711), and a preset load is provided via the hysteresis brake (710); the hysteresis brake (710) is mounted on the third slide (711) and is located on an adjacent side of the torque sensor (700).

2. The motor no-load and load testing method according to claim 1, characterized in that: The step of controlling the accelerometer (620) to stop vibration detection and controlling the intermediate platform (300) to switch to a rigid connection state further includes: A displacement sensor (630) is abutted against the rotation axis of the target product to detect axis runout, and the displacement sensor (630) is arranged on the peripheral side of the positioning platform (400).

3. The motor no-load and load testing method according to claim 1, characterized in that: The method of driving the hysteresis brake (710) to connect with the torque sensor (700) through the third slide (711) and providing a preset load through the hysteresis brake (710) may also include: The torque is detected by the torque sensor (700), and / or the rotation speed is detected by a photoelectric sensor (730) and a code disc (720); the code disc (720) is connected to the torque sensor (700), and the photoelectric sensor (730) is arranged on the adjacent side of the code disc (720) and facing the code disc (720).

4. The motor no-load and load testing method according to claim 1, 2 or 3, characterized in that: The method further comprises driving the hysteresis brake (710) to connect with the torque sensor (700) through the third slide (711), and providing a preset load through the hysteresis brake (710), and then further comprising: Controlling the intermediate carrier (300) to switch to a flexible connection state; The target product is started and vibration detection is performed on the target product through the accelerometer (620).

5. The motor no-load and load testing method according to claim 4, characterized in that: The intermediate platform (300) comprises a bottom plate (310), a carrier plate (320), a shock absorbing member (330) and at least two clamping members (340); the bottom plate (310) is connected to the first slide platform (210), and the carrier plate (320) is connected to the positioning platform (400); Controlling the intermediate carrier (300) to switch to a rigid connection state comprises: controlling the at least two clamping members (340) to abut against the side of the carrier plate (320); The controlling the intermediate carrier (300) to switch to a flexible connection state comprises: controlling the at least two clamping members (340) to detach from the carrier plate (320).

6. A motor no-load and load test method, applied to motor testing equipment, characterized in that: include: Mounting a target product on a positioning platform (400) and providing a forward or reverse excitation signal to the target product, wherein the positioning platform (400) is mounted on an intermediate platform (300), the intermediate platform (300) is mounted on a first slide platform (210), and the intermediate platform (300) is in a rigidly connected state; Controlling the push assembly (120) to abut against the first slide (210), and driving the second slide (220) to move through the slide drive mechanism (221), so that the torque sensor (700) is connected to the rotation axis of the target product, the slide drive mechanism (221) is connected to the second slide (220), the second slide (220) and the first slide (210) are installed on the same slide rail, and the second slide (220) and the push assembly (120) are distributed on opposite sides of the first slide (210), the torque sensor (700) is installed on the second slide (220) and is connected to a hysteresis brake (710), and the hysteresis brake (710) provides a preset load; Starting the audio acquisition component (610) to detect noise; Controlling the intermediate platform (300) to switch to a flexible connection state, and placing an accelerometer (620) in contact with the target product to detect vibration, wherein the audio collection component (610) and the accelerometer (620) are both mounted on the peripheral side of the positioning platform (400); The hysteresis brake (710) is driven to disengage from the torque sensor (700) through a third slide (711), and noise detection and vibration detection are maintained. The hysteresis brake (710) is mounted on the third slide (711).

7. The motor no-load and load testing method according to claim 6, characterized in that: The controlling the intermediate platform (300) to switch to a flexible connection state also includes: The torque is detected by the torque sensor (700), and / or the rotation speed is detected by a photoelectric sensor (730) and a code disc (720); the code disc (720) is connected to the torque sensor (700), and the photoelectric sensor (730) is arranged on the adjacent side of the code disc (720) and facing the code disc (720).

8. The motor no-load and load testing method according to claim 7, characterized in that: The controlling the intermediate platform (300) to switch to a flexible connection state also includes: A displacement sensor (630) is abutted against the rotation axis of the target product to detect axis runout, and the displacement sensor (630) is arranged on the peripheral side of the positioning platform (400).

9. The motor no-load and load testing method according to claim 8, characterized in that: The method further comprises: driving the hysteresis brake (710) to disengage from the torque sensor (700) through the third slide (711), and maintaining noise detection and vibration detection, and then: Controlling the accelerometer (620) to stop vibration detection, and controlling the intermediate platform (300) to switch to a rigid connection state; Maintain noise detection; At least one of torque detection, rotation speed detection and shaft runout detection is maintained.

10. The motor no-load and load testing method according to claim 8, characterized in that: The method further comprises: driving the hysteresis brake (710) to disengage from the torque sensor (700) through the third slide (711), and maintaining noise detection and vibration detection, and then: Controlling the accelerometer (620) to stop vibration detection, and controlling the intermediate platform (300) to switch to a rigid connection state; driving the second slide table (220) to move by means of the slide table driving mechanism (221), so that the torque sensor (700) is separated from the rotation axis of the target product; Noise detection is maintained and shaft runout detection is performed through the displacement sensor (630).

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