Motor No-Load and Load Test Methods

Abstract

The present invention discloses a method for testing a motor under no-load and loaded conditions, which includes installing a target product on a positioning stage and providing a forward or reverse excitation signal to the target product; starting an audio acquisition component 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 stage to switch to a rigid connection state; controlling a pushing component to abut against a first slide and driving a second slide to move through a slide driving mechanism so that a torque sensor is connected to a rotating shaft of the target product; connecting a hysteresis brake to the torque sensor through a third slide and providing a preset load through the hysteresis brake, where the hysteresis brake is installed on the third slide and is adjacent to the torque sensor. The present invention can switch between no-load conditions and loaded conditions to facilitate continuous testing of multiple functions.

Description

Technical Field

[0001] The present invention relates to the technical field of automated testing, and particularly relates to a method for testing a motor under no-load and loaded conditions. Background Art

[0002] A motor (also known as a motor) is a common power device. With the development of technology, the application of small motors is becoming more and more widespread, and they are commonly found in household appliances and 3C products, etc. In order to ensure the production quality of the motor, quality testing needs to be carried out before leaving the factory. However, the testing equipment in the related technology can perform fewer test items, has a low degree of integration, and the working conditions simulated between different test items are different. If multiple tests need to be carried out, multiple different devices need to be used for collaborative testing. The transfer of the target product between different devices takes time, and it is difficult to perform continuous testing of 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. For this purpose, the present invention provides a method for testing a motor under no-load and loaded conditions, which can switch between no-load working conditions and loaded working conditions to facilitate continuous testing of multiple functions.

[0004] On the one hand, an embodiment of the present invention provides a method for testing a motor under no-load and loaded conditions, which is applied to a motor testing device and includes:

[0005] Install the target product on the positioning carrier, and provide a forward or reverse excitation signal to the target product. The positioning carrier is installed on the intermediate carrier, the intermediate carrier is installed on the first sliding table, and the intermediate carrier is in a flexible connection state;

[0006] Start the audio acquisition component to detect noise, and abut the accelerometer against the target product to detect vibration. Both the audio acquisition component and the accelerometer are installed on the periphery of the positioning carrier;

[0007] Control the accelerometer to stop vibration detection, and control the intermediate carrier to switch to a rigid connection state;

[0008] Control the pushing component to abut against the first sliding table, and drive the second sliding table to move through the sliding table driving mechanism, so that the torque sensor is connected to the rotating shaft of the target product. The sliding table driving mechanism is connected to the second sliding table. The second sliding table and the first sliding table are installed on the same slide rail, and the second sliding table and the pushing component are distributed on opposite sides of the first sliding table. The torque sensor is installed on the second sliding table;

[0009] The hysteresis brake is driven by the third slide table to be connected with the torque sensor, and a preset load is provided through the hysteresis brake. The hysteresis brake is mounted on the third slide table and adjacent to the torque sensor.

[0010] According to some embodiments of the present invention, after controlling the accelerometer to stop vibration detection and controlling the intermediate stage to switch to a rigid connection state, the following steps are further included:

[0011] The displacement sensor is abutted against the rotating shaft of the target product to detect shaft yaw. The displacement sensor is arranged on the periphery of the positioning stage.

[0012] According to some embodiments of the present invention, before and / or after driving the hysteresis brake by the third slide table to be connected with the torque sensor and providing a preset load through the hysteresis brake, the following steps are further included:

[0013] Detect the torque through the torque sensor, and / or detect the rotational speed through the photoelectric sensor and the code disk; the code disk is connected with the torque sensor, and the photoelectric sensor is arranged adjacent to the code disk and faces the code disk.

[0014] According to some embodiments of the present invention, after driving the hysteresis brake by the third slide table to be connected with the torque sensor and providing a preset load through the hysteresis brake, the following steps are further included:

[0015] Control the intermediate stage to switch to a flexible connection state;

[0016] Start and perform vibration detection on the target product through the accelerometer.

[0017] According to some embodiments of the present invention, the intermediate stage includes a bottom plate, a carrier plate, a shock absorber, and at least two clamping members. The bottom plate is connected with the first slide table, and the carrier plate is connected with the positioning stage;

[0018] Controlling the intermediate stage to switch to a rigid connection state includes: controlling the at least two clamping members to abut against the side of the carrier plate;

[0019] Controlling the intermediate stage to switch to a flexible connection state includes: controlling the at least two clamping members to disengage from the carrier plate.

[0020] On the other hand, an embodiment of the present invention provides a method for testing the no-load and loaded conditions of a motor, which is applied to a motor testing device and includes:

[0021] Mount the target product on the positioning stage and provide a forward or reverse excitation signal to the target product. The positioning stage is mounted on the intermediate stage, the intermediate stage is mounted on the first slide table, and the intermediate stage is in a rigid connection state;

[0022] Control the pushing component to abut against the first sliding table, and drive the second sliding table to move through the sliding table driving mechanism, so that the torque sensor is connected to the rotating shaft of the target product. The sliding table driving mechanism is connected to the second sliding table. The second sliding table and the first sliding table are installed on the same slide rail, and the second sliding table and the pushing component are distributed on opposite sides of the first sliding table. The torque sensor is installed on the second sliding table and is connected with a hysteresis brake, and the hysteresis brake provides a preset load;

[0023] Start the audio acquisition component to detect noise;

[0024] Control the intermediate carrier to switch to a flexible connection state, and abut the accelerometer against the target product to detect vibration. The audio acquisition component and the accelerometer are both installed on the periphery of the positioning carrier;

[0025] Drive the hysteresis brake away from the torque sensor through the third sliding table, and maintain noise detection and vibration detection. The hysteresis brake is installed on the third sliding table.

[0026] According to some embodiments of the present invention, before controlling the intermediate carrier to switch to a flexible connection state, it further includes:

[0027] Detect torque through the torque sensor, and / or detect rotational speed through the photoelectric sensor and the code disk; the code disk is connected to the torque sensor, and the photoelectric sensor is arranged adjacent to the code disk and faces the code disk.

[0028] According to some embodiments of the present invention, before controlling the intermediate carrier to switch to a flexible connection state, it further includes:

[0029] Abut the displacement sensor against the rotating shaft of the target product to detect shaft yaw. The displacement sensor is arranged on the periphery of the positioning carrier.

[0030] According to some embodiments of the present invention, after driving the hysteresis brake away from the torque sensor through the third sliding table and maintaining noise detection and vibration detection, it further includes:

[0031] Control the accelerometer to stop vibration detection, and control the intermediate carrier to switch to a rigid connection state;

[0032] Maintain noise detection;

[0033] Maintain at least one of torque detection, rotational speed detection and shaft yaw detection.

[0034] According to some embodiments of the present invention, after driving the hysteresis brake away from the torque sensor by the third slide table and maintaining noise detection and vibration detection, the following steps are further included:

[0035] Control the accelerometer to stop vibration detection, and control the intermediate carrier to switch to a rigid connection state;

[0036] Drive the second slide table to move through the slide table driving mechanism, so that the torque sensor is disengaged from the rotating shaft of the target product;

[0037] Maintain noise detection, and perform shaft yaw detection through the displacement sensor.

[0038] The embodiments of the present invention at least have the following beneficial effects:

[0039] Through the audio acquisition component, continuous noise detection can be carried out during the test process. The intermediate carrier can be switched between flexible connection and rigid connection to meet the test conditions under different working conditions. By driving the second slide table to move through the slide table driving mechanism and driving the hysteresis brake to move by the third slide table, the switching between no-load and loaded working conditions is realized. During the test process, data can be collected through the audio acquisition component and the accelerometer, and multiple functions of the motor can be continuously detected.

[0040] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0042] Figure 1 is one of the step flowcharts of the no-load and loaded test method of the motor according to the embodiment of the present invention;

[0043] Figure 2 is one of the structural schematic diagrams of the motor test equipment according to the embodiment of the present invention;

[0044] Figure 3 is the second structural schematic diagram of the motor test equipment according to the embodiment of the present invention;

[0045] Figure 4 is the third structural schematic diagram of the motor test equipment according to the embodiment of the present invention;

[0046] Figure 5 is Figure 2 the structural schematic diagram of the intermediate carrier and the positioning carrier of the motor test equipment shown;

[0047] Figure 6 isFigure 5 Exploded structural schematic diagram of the intermediate carrier and the positioning carrier shown

[0048] Figure 7 It is the second step flow chart of the no-load and load test method of the motor according to the embodiment of the present invention

[0049] Reference numerals:

[0050] Base 100, first slide rail 110, pushing assembly 120, first slide table 210, second slide table 220, slide table driving mechanism 221, intermediate carrier 300, bottom plate 310, carrier plate 320, second wedge surface 321, shock absorber 330, clamping member 340, first wedge surface 341, positioning carrier 400, positioning block 410, positioning cavity 411, avoidance position 412, first clamping block 420, second clamping block 430, two-way cylinder 440, audio acquisition assembly 610, accelerometer 620, lifting and rotating mechanism 621, displacement sensor 630, second lifting driving member 631, torque sensor 700, hysteresis brake 710, third slide table 711, code disk 720, photoelectric sensor 730 Detailed implementation manners

[0051] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention

[0052] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention

[0053] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, greater than, less than, exceeding, etc. are understood not to include the present number, and "above", "below", "within", etc. are understood to include the present number. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features

[0054] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0055] Please refer to Figure 1 , this embodiment discloses a method for testing a motor under no-load and loaded conditions, which is applied to a motor testing device. To facilitate understanding of the motor testing method of this embodiment, the structure of the motor testing device will be described first below.

[0056] Please refer to Figure 2 , Figure 3 and Figure 4 , the motor testing device includes a first sliding table assembly and a second sliding table assembly installed on the same slide rail. Exemplarily, a first slide rail 110 is installed on a base 100, and both the first sliding table assembly and the second sliding table assembly are slidably installed on the first slide rail 110. For example, the first sliding table assembly includes a first sliding table 210, an intermediate carrier 300, and a positioning carrier 400, and the second sliding table assembly includes a second sliding table 220, a torque sensor 700, a hysteresis brake 710, a code disk 720, and a photoelectric sensor 730. Both the first sliding table 210 and the second sliding table 220 are slidably installed on the first slide rail 110. Please refer to Figure 5 and Figure 6 , the intermediate carrier 300 is installed on the first sliding table 210. The intermediate carrier 300 includes 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 sliding table 210, and the shock-absorbing member 330 is connected between the bottom plate 310 and the carrier plate 320. The shock-absorbing member 330 can adopt structures such as urethane rubber, shock-absorbing silica gel, or shock-absorbing springs. The clamping member 340 is a structure driven by a cylinder, and at least two clamping members 340 are installed on the bottom plate 310 and are distributed on opposite sides of the carrier plate 320. The positioning carrier 400 is installed on the carrier plate 320, and the positioning carrier 400 is used to carry the target product. A pushing assembly 120 is provided on the adjacent side of the first sliding table assembly. Specifically, the pushing assembly 120 is installed on the base 100 and is located on the adjacent side of the first sliding table 210. An audio acquisition assembly 610, an accelerometer 620, and a displacement sensor 630 are provided on the periphery of the positioning carrier 400. The audio acquisition assembly 610 uses a microphone. The second sliding table 220 is connected to a sliding table driving mechanism 221, and the sliding table driving mechanism 221 adopts a combination of a lead screw and a motor. The torque sensor 700 is installed on the second sliding table 220, and the torque sensor 700 is connected to the hysteresis brake 710 and the code disk 720. The photoelectric sensor 730 is provided on the adjacent side of the code disk 720, and the detection end of the photoelectric sensor 730 faces the code disk 720.

[0057] In this embodiment, a small motor is used as the target product. Since the small motor has a small size, correspondingly, the volume of the motor test equipment in this embodiment is also small. To meet the requirements of miniaturized design, the structural arrangement among the various components of the motor test equipment is compact. For example, the intermediate stage 300 and the positioning stage 400 are both arranged on the first slide 210, and the torque sensor 700, the hysteresis brake 710, the code disk 720, and the photoelectric sensor 730 are all arranged on the second slide 220. Among them, the hysteresis brake 710 is installed on the third slide 711 and can be connected to or disengaged from the torque sensor 700 under the drive of the third slide 711. The pushing assembly 120, the audio acquisition assembly 610, the accelerometer 620, and the displacement sensor 630 are distributed around the first slide assembly. The modular structural layout is clear and compact, with high integration and is convenient for debugging and maintenance.

[0058] The test items of the small motor 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 apply a certain force to the target product during the test, requiring the target product to be placed stably. Based on this, an intermediate stage 300 is added between the first slide 210 and the positioning stage 400 in this embodiment. The intermediate stage 300 has two states: 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 against the carrier plate 320, the carrier plate 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, it can isolate the vibration of the external environment conducted through the first slide 210, thereby improving the accuracy of the test. When the clamping member 340 abuts against the side of the carrier plate 320, the carrier plate 320, the clamping member 340, and the bottom plate 310 form a rigid connection relationship, making the connection between the carrier plate 320 and the bottom plate 310 reliable, thereby improving the placement stability of the target product. It is worth mentioning that the clamping member 340 abuts against and clamps the side of the carrier plate 320, which can clamp the carrier plate 320 while avoiding the carrier plate 320 continuously applying pressure to the shock-absorbing member 330, reducing the fatigue degree of the shock-absorbing member 330, and being beneficial to improving the durability and shock-absorbing reliability of the shock-absorbing member 330. Among them, the number of the clamping members 340 can be determined according to the actual application situation, such as two or four, etc. Every two clamping members 340 form a group and abut against the opposite sides of the carrier plate 320 respectively.

[0059] The no-load and load test method of the motor in this embodiment includes S110~S150. It should be noted that the steps in this embodiment are numbered only for the convenience of review and understanding, rather than for limiting the execution order of the steps. The content of each step is described in detail below:

[0060] S110. Install the target product on the positioning stage 400 and provide a forward or reverse excitation signal to the target product. The intermediate stage 300 is in a flexible connection state, that is, the shock absorber 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;

[0061] Exemplarily, please refer to Figure 5 and Figure 6 , the positioning stage 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 for placing the target product. Avoidance positions 412 are provided on 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 double-acting cylinder 440. The double-acting cylinder 440 is used to drive the first clamping block 420 and the second clamping block 430 to move towards or away from each other, so as to clamp or loosen the target product. Among them, by providing the avoidance positions 412 on the positioning block 410, the relative height of the first clamping block 420 and the second clamping block 430 can be reduced, which is beneficial to realizing miniaturized design. By using the double-acting cylinder 440 to drive the first clamping block 420 and the second clamping block 430, not only can the number of cylinders be saved to meet the requirements of miniaturized design, but also the pressure applied to the carrier plate 320 can be reduced, which can improve the shock absorption effect of the intermediate stage 300 to a certain extent, and can also improve the action synchronization performance of the first clamping block 420 and the second clamping block 430, so that the target product can be kept at the preset center position. Among them, the double-acting cylinder 440 is installed at the bottom of the positioning block 410 and is connected to the carrier plate 320. By arranging the double-acting cylinder 440 between the positioning block 410 and the carrier plate 320, the positioning block 410 can be supported by the double-acting cylinder 440, and the center of gravity of the double-acting cylinder 440 and the positioning block 410 can be kept on the same or similar longitudinal straight line, which is beneficial to ensuring the uniform force on the carrier plate 320 at each position, avoiding excessive force on one side, and is beneficial to improving the shock absorption effect.

[0062] In this step, a forward or reverse excitation signal can be provided to the target product to perform a forward rotation test or a reverse rotation test on the target product. The test items of the forward rotation test and the reverse rotation test are the same, and will not be distinguished and described in this article. In the initial state, the intermediate stage 300 is in a flexible connection state, that is, the shock absorber 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, so as to facilitate vibration detection. In this state, the carrier plate 320 is connected to the bottom plate 310 through the shock absorber 330, which can isolate the interference of external vibration factors on the vibration test and is beneficial to improving the accuracy of detection.

[0063] S120. Start the audio acquisition component 610 to detect noise, and abut the accelerometer 620 against the target product to detect vibration;

[0064] Exemplarily, during the test, continuous noise detection is performed through the audio acquisition component 610. To improve the detection accuracy, the motor test equipment further includes a sound insulation box. Both the first sliding table component and the second sliding table component are installed in the sound insulation box, thereby reducing the interference of environmental noise. Please refer to Figure 4 , the accelerometer 620 is connected to a lifting and rotating mechanism 621. The lifting and rotating mechanism 621 adopts a cylinder-driven structure. In some application examples, the lifting and rotating mechanism 621 is installed on the base 100. Or, in some other application examples, the lifting and rotating mechanism 621 is installed on the top plate of the sound insulation box. The lifting and rotating mechanism 621 is used to drive the accelerometer 620 to switch between a first working position and a second working position. The first working position and the second working position are located on 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 an axis and descend, so as to switch from the second working position to the first working position. Among them, the accelerometer 620 abuts against the target product at the first working position to detect the vibration of the target product. The second working position of the accelerometer 620 is located above the adjacent side of the positioning stage 400, and can avoid the placement trajectory of the target product, which is beneficial to installing the target product on the positioning stage 400.

[0065] S130. Control the accelerometer 620 to stop vibration detection, and control the intermediate stage 300 to switch to a rigid connection state, that is, abut against the side of the carrier plate 320 through at least two clamping members 340;

[0066] Exemplarily, after the vibration detection is completed, control the accelerometer 620 to stop signal acquisition, that is, stop vibration detection. Abut against the side of the carrier plate 320 through at least two clamping members 340, so that the intermediate stage 300 switches to a rigid connection state, that is, the carrier plate 320 is connected to the bottom plate 310 through the clamping members 340. Among them, please refer to 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 plate 320 is provided with a second wedge surface 321. The first wedge surface 341 and the second wedge surface 321 are in movable abutment. During the test, the target product will continuously generate vibration, and conduct the vibration to the carrier plate 320 through the positioning stage 400, so that there is a tendency of relative movement between the carrier plate 320 and the clamping member 340. The first wedge surface 341 abuts against the second wedge surface 321, which can limit the movement of the carrier plate 320 in the longitudinal direction and the horizontal direction, thereby improving the connection reliability between the carrier plate 320 and the clamping member 340. Moreover, compared with machining fitting structures such as positioning holes and positioning grooves on the carrier plate 320, the design of the second wedge surface 321 can avoid the gap between the clamping member 340 and the carrier plate 320 caused by machining errors, resulting in unstable abutment.

[0067] It should be noted that the abutting direction of the clamping member 340 is from the side of the carrier plate 320 towards the center of the carrier plate 320, that is, the clamping member 340 applies a horizontal abutting force to the side of the carrier plate 320, thereby clamping the carrier plate 320 and preventing the carrier plate 320 from continuously applying pressure to the shock absorber 330 in the rigid connection state. Otherwise, the shock absorber 330 is prone to fatigue and the shock absorption effect is reduced.

[0068] S140. Control the pushing assembly 120 to abut against the first sliding table 210, and drive the second sliding table 220 to move through the sliding table driving mechanism 221, so that the torque sensor 700 is connected to the rotating shaft of the target product.

[0069] Please refer to Figure 2 、 Figure 3 and Figure 4 , both the first sliding table 210 and the second sliding table 220 are connected to the first slide rail 110. By driving the second sliding table 220 to move through the sliding table driving mechanism 221, the second sliding table 220 moves towards the first sliding table 210. The target product is installed on the positioning carrier 400, and the rotating shaft of the target product points to the torque sensor 700, while the torque sensor 700 is installed on the second sliding table 220. The second sliding table 220 drives the torque sensor 700 to move synchronously towards the first sliding table 210, which can connect the torque sensor 700 to the rotating shaft of the target product. It is worth mentioning that the second sliding table 220 and the pushing assembly 120 are distributed on opposite sides of the first sliding table 210. The pushing assembly 120 abuts against the first sliding table 210 and provides a reaction force to the first sliding table 210, which can prevent the second sliding table 220 from driving the first sliding table 210 to move in the same direction.

[0070] S150. Drive the hysteresis brake 710 to be connected to the torque sensor 700 through the third sliding table 711, and provide a preset load through the hysteresis brake 710.

[0071] Exemplarily, the hysteresis brake 710 is a torque control component using the hysteresis principle. By using the hysteresis principle and controlling the input excitation current, a certain torque can be generated to provide different loads to the target product, such as light load and full load. The third sliding table 711 drives the hysteresis brake 710 to move towards 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 addition working condition of the target product.

[0072] In this way, the audio acquisition component 610 can continuously detect noise during the test process. The intermediate stage 300 switches between flexible connection and rigid connection to meet the test conditions under different working conditions. The second stage 220 is driven to move by the stage driving mechanism 221 and the hysteresis brake 710 is driven to move by the third stage 711 to realize the switching between no-load and loaded working conditions. During the test process, data can be collected through the audio acquisition component 610 and the accelerometer 620, and continuous detection of multiple functions of the motor can be performed.

[0073] Step S130: Control the accelerometer 620 to stop vibration detection and control the intermediate stage 300 to switch to the rigid connection state. After that, it further includes: pressing the displacement sensor 630 against the rotating shaft of the target product to detect shaft yaw. The displacement sensor 630 is arranged on the periphery of the positioning stage 400.

[0074] Exemplarily, please refer to Figure 3 and Figure 4 , the displacement sensor 630 is connected to a second lifting drive member 631. Considering the requirements of miniaturized design, the second lifting drive member 631 is located above the positioning stage 400. For example, the motor test equipment further includes a sound insulation box. The first stage assembly and the second stage assembly are both installed in the sound insulation box, and the second lifting drive member 631 is installed on the top of the sound insulation box, which can save the layout space of the base 100, make the layout between various mechanisms more compact, and achieve miniaturized design. The second lifting drive member 631 adopts a cylinder drive structure and is used to drive the displacement sensor 630 to move up and down. For example, in the initial state, the displacement sensor 630 is located above the rotating shaft of the target product. When shaft yaw detection is required, the second lifting drive member 631 drives the displacement sensor 630 to move downwards so that the displacement sensor 630 presses against the rotating shaft of the target product, thereby detecting the shaft yaw of the target product through the displacement sensor 630.

[0075] Step S150: Drive the hysteresis brake 710 to be connected to the torque sensor 700 through the third stage 711 and provide a preset load through the hysteresis brake 710. Before and / or after that, it further includes: detecting torque through the torque sensor 700, and / or detecting the rotational speed through the photoelectric sensor 730 and the code disk 720.

[0076] 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. The speed of the target product under the no-load condition can be detected by the cooperation of the code disk 720 and the photoelectric sensor 730. Among them, the code disk 720 is installed on the torque sensor 700, and the target product drives the code disk 720 to rotate through the torque sensor 700. The code disk 720 is provided with a light-transmitting part and a light-shielding part arranged alternately. During the rotation of the code disk 720, the detection signal of the photoelectric sensor 730 is triggered. According to the number of signal triggers of the photoelectric sensor 730 within a unit time, the speed of the target product can be determined. In practical 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 disk 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 disk 720.

[0077] After step S150, the loaded condition of the target product is simulated, and the torque of the target product under the loaded condition is detected by the torque sensor 700. The speed of the target product under the loaded condition can be detected by the cooperation of the code disk 720 and the photoelectric sensor 730. Among them, the hysteresis brake 710 can adjust the load applied to the target workpiece according to the magnitude of the input current, so as to realize the tests under different load conditions such as light load and full load.

[0078] Step S150: The third slide 711 drives the hysteresis brake 710 to be connected with the torque sensor 700, and a preset load is provided by the hysteresis brake 710. After that, it further includes: controlling the intermediate stage 300 to switch to the flexible connection state; starting and detecting the vibration of the target product through the accelerometer 620.

[0079] Exemplarily, when detecting the vibration of the target product under the simulated loaded condition, in order to improve the detection accuracy, at least two clamping members 340 are controlled to disengage from the carrier plate 320, so that the intermediate stage 300 switches to the 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 keeps abutting against the target product, when detecting the vibration under the simulated loaded condition, the accelerometer 620 is started to collect signals to detect the vibration of the target product. Among them, during the vibration detection process, the load output by the hysteresis brake 710 can be changed, so as to realize the vibration detection under different load conditions.

[0080] The above embodiments are those where the motor testing equipment starts testing under no-load conditions and then switches to testing under loaded conditions. Hereinafter, a method for testing a motor under no-load and loaded conditions is also provided, which is an embodiment where the motor testing equipment starts testing under loaded conditions and then switches to testing under no-load conditions. The structure of the motor testing equipment can be referred to above and will not be elaborated here.

[0081] Please refer to Figure 7 , an embodiment of the present invention provides a method for testing a motor under no-load and loaded conditions, which is applied to a motor testing equipment and includes S210 to S250. It should be noted that the steps in this embodiment are numbered only for the convenience of review and understanding, rather than to limit the execution order of the steps. Hereinafter, please refer to Figures 2 to 6 for a detailed description of the content of each step:

[0082] S210. Install the target product on the positioning stage 400 and provide a forward or reverse excitation signal to the target product, and the intermediate stage 300 is in a rigid connection state;

[0083] Exemplarily, different from the above application example, before starting the test, the intermediate stage 300 is in a rigid connection state, that is, at least two clamping members 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 clamping members 340. In the rigid connection state, the target product is stably placed to facilitate subsequent connection with the torque sensor 700.

[0084] S220. Control the pushing component 120 to abut against the first sliding table 210, and drive the second sliding table 220 to move through the sliding table driving 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 sliding table 220 and is connected with a hysteresis brake 710, and the hysteresis brake 710 provides a preset load;

[0085] Exemplarily, both the first sliding table 210 and the second sliding table 220 are connected to the first slide rail 110. By driving the second sliding table 220 to move through the sliding table driving mechanism 221, the second sliding table 220 moves towards the direction close to the first sliding table 210. The target product is installed on the positioning stage 400, and the rotating shaft of the target product points to the torque sensor 700, while the torque sensor 700 is installed on the second sliding table 220. The second sliding table 220 drives the torque sensor 700 to move synchronously towards the direction close to the first sliding table 210, which can connect the torque sensor 700 to the rotating shaft of the target product. The hysteresis brake 710 provides a preset load greater than zero. It is worth mentioning that the second sliding table 220 and the pushing component 120 are distributed on opposite sides of the first sliding table 210. The pushing component 120 abuts against the first sliding table 210 and provides a reverse acting force to the first sliding table 210, which can prevent the second sliding table 220 from driving the first sliding table 210 to move in the same direction.

[0086] S230. Start the audio acquisition component 610 to detect noise;

[0087] Exemplarily, during the test, the target product is continuously detected for noise by the audio acquisition component 610. To improve the detection accuracy, the motor test equipment further includes a sound insulation box. Both the first sliding table component and the second sliding table component are installed in the sound insulation box, thereby reducing the interference of ambient noise.

[0088] S240. Control the intermediate stage 300 to switch to a flexible connection state, and abut the accelerometer 620 against the target product to detect vibration;

[0089] Exemplarily, to reduce the influence of external environmental factors, control the intermediate stage 300 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 absorber 330. The shock absorber 330 has a shock absorption function and can isolate the external vibration transmitted through the first sliding table 210. To make full use of the layout space, the positioning stage 400 supports from the bottom side of the target product and clamps from both sides, and the accelerometer 620 presses down from the upper side of the target product. Among them, the installation method of the accelerometer 620 can refer to the above text and will not be elaborated here.

[0090] S250. Drive the hysteresis brake 710 to disengage from the torque sensor 700 through the third sliding table 711, and maintain the noise detection and vibration detection.

[0091] Exemplarily, the hysteresis brake 710 is installed on the third sliding table 711. The third sliding table 711 can drive the hysteresis brake 710 to move in a straight line direction to disengage from the torque sensor 700, so that the target product switches from the loaded condition to the no-load condition. During the switching process, maintaining the noise detection and vibration detection can achieve continuous detection under different working conditions.

[0092] In this way, through the audio acquisition component 610, continuous noise detection can be carried out during the test. The intermediate stage 300 switches between flexible connection and rigid connection to meet the test conditions under different working conditions. The second sliding table 220 is driven to move by the sliding table driving mechanism 221 and the hysteresis brake 710 is driven to move by the third sliding table 711 to realize the switching between no-load and loaded conditions. During the test, data can be collected through the audio acquisition component 610 and the accelerometer 620, and continuous detection of multiple functions of the motor can be achieved.

[0093] Before step S240, controlling the intermediate stage 300 to switch to a flexible connection state, it further includes: detecting torque through the torque sensor 700, and / or detecting the rotational speed through the photoelectric sensor 730 and the code disk 720.

[0094] Exemplarily, under the condition of simulating the load - adding working condition of the target product, before the intermediate stage 300 switches the connection state and conducts vibration detection, torque detection of the target product under the load - adding working condition is performed by the torque sensor 700, and rotational speed detection of the target product under the load - adding working condition can be performed by the cooperation of the code disk 720 and the photoelectric sensor 730. Among them, the hysteresis brake 710 can adjust the load applied to the target workpiece according to the magnitude of the input current, so as to realize tests under different load conditions such as light load and full load.

[0095] Step S240, controlling the intermediate stage 300 to switch to a flexible connection state, further includes: abutting the displacement sensor 630 against the rotating shaft of the target product to detect shaft yaw.

[0096] Exemplarily, controlling the intermediate stage 300 to switch to a flexible state is to improve the accuracy of detection during vibration detection. Before performing vibration detection, shaft yaw detection of the target product can also be performed by the displacement sensor 630. The installation method of the displacement sensor 630 can refer to the above text and will not be elaborated here.

[0097] In some application examples, in step S250, the third slide 711 drives the hysteresis brake 710 to disengage from the torque sensor 700, and noise detection and vibration detection are maintained. After that, it further includes: controlling the accelerometer 620 to stop vibration detection, and controlling the intermediate stage 300 to switch to a rigid connection state; maintaining noise detection; and maintaining at least one of torque detection, rotational speed detection, and shaft yaw detection.

[0098] Exemplarily, under the condition of simulating the no - load working condition, when the vibration detection is completed, controlling the accelerometer 620 to stop vibration detection can avoid collecting interference signals and affecting subsequent data analysis. Controlling the intermediate stage 300 to switch to a rigid connection state means controlling the clamping member 340 to abut against the side of the carrier plate 320. During the test, the audio acquisition component 610 is used to maintain sound signal acquisition to maintain noise detection; thereafter, corresponding test items can be selected according to actual test requirements. For example, torque detection is maintained by the torque detection sensor, or rotational speed detection is maintained by the code disk 720 and the photoelectric sensor 730, or shaft yaw detection is maintained by the displacement sensor 630, or any two or all of torque detection, rotational speed detection, and shaft yaw detection are maintained.

[0099] Or, in some other application examples, in step S250, the third slide 711 drives the hysteresis brake 710 to disengage from the torque sensor 700, and noise detection and vibration detection are maintained. After that, it further includes:

[0100] Control the accelerometer 620 to stop vibration detection, and control the intermediate stage 300 to switch to a rigid connection state; drive the second slide 220 to move through the slide driving mechanism 221 so that the torque sensor 700 disengages from the rotation axis of the target product; maintain noise detection, and perform shaft yaw detection through the displacement sensor 630.

[0101] Exemplarily, the torque sensor 700 disengaging from the rotation axis of the target product can avoid the rotational interference of the torque sensor 700 on the target product, and can more accurately simulate the no-load working condition of the target product. At this time, maintaining noise detection through the audio acquisition component 610 and maintaining shaft yaw detection through the displacement sensor 630 are beneficial to improving the accuracy of detection.

[0102] This embodiment can automatically and continuously perform no-load tests and load tests on the target product, with a high degree of automation. It can perform multiple tests under different working conditions. During the test process, there is no need to transfer the target product between different devices, the operation is simple, the transfer time is saved, and it is beneficial to improve the test efficiency.

[0103] 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 component to simulate different working conditions and realize continuous tests of multiple functions under different working conditions. However, considering that the functional tests involving structures such as the radial thrust mechanism and the first pressure detection component are not the key solutions of this embodiment, therefore, this embodiment will not be elaborated.

[0104] The embodiments of the present invention have been described in detail above with reference to the drawings, but the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which the present invention pertains, various changes can be made without departing from the gist of the present invention.

Claims

1. A motor no-load and load testing method, applied to motor testing equipment, characterized in that: include: The target product is mounted on a positioning platform (400), and a forward or reverse rotation excitation signal is provided to the target product, wherein the positioning platform (400) is mounted on an intermediate platform (300), and the intermediate platform (300) is mounted on a first slide (210), and the intermediate platform (300) is in a flexible connection state; activating an audio collection component (610) to detect noise, and placing an accelerometer (620) against the target product to detect vibration, wherein both the audio collection component (610) and the accelerometer (620) are mounted on a 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 via 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); A hysteresis brake (710) is driven to connect with the torque sensor (700) via a 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 adjacent to the torque sensor (700).

2. The motor no-load and load testing method according to claim 1, characterized in that: The method further includes controlling the accelerometer (620) to stop vibration detection and controlling the intermediate platform (300) to switch to a rigid connection state, and then 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 no-load and loaded test method for the motor according to claim 1, wherein 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 before and / or after the method further comprises: The torque is detected by the torque sensor (700), and / or the rotational speed is detected by a photoelectric sensor (730) and a code disk (720); the code disk (720) is connected to the torque sensor (700), and the photoelectric sensor (730) is arranged on the adjacent side of the code disk (720) and facing the code disk (720).

4. The no-load and loaded test method for the motor 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 platform (300) to switch to a flexible connection state; Start and perform vibration detection 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 carrier (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 sliding table (210), and the carrier plate (320) is connected to the positioning carrier (400). Controlling the intermediate carrier (300) to switch to a rigid connection state includes: controlling the at least two clamping members (340) to abut against the side of the carrier plate (320). Controlling the intermediate carrier (300) to switch to a flexible connection state includes: controlling the at least two clamping members (340) to disengage from the carrier plate (320).

6. A motor no-load and load testing method, applied to motor testing equipment, characterized in that: Including: Install the target product on the positioning carrier (400), and provide a forward or reverse excitation signal to the target product. The positioning carrier (400) is installed on the intermediate carrier (300), the intermediate carrier (300) is installed on the first sliding table (210), and the intermediate carrier (300) is in a rigid connection state. Control the pushing component (120) to abut against the first sliding table (210), and drive the second sliding table (220) to move through the sliding table driving mechanism (221) so that the torque sensor (700) is connected to the rotating shaft of the target product. The sliding table driving mechanism (221) is connected to the second sliding table (220). The second sliding table (220) and the first sliding table (210) are installed on the same slide rail, and the second sliding table (220) and the pushing component (120) are distributed on opposite sides of the first sliding table (210). The torque sensor (700) is installed on the second sliding table (220) and is connected to a hysteresis brake (710), and the hysteresis brake (710) provides a preset load. Start the audio acquisition component (610) to detect noise. Control the intermediate carrier (300) to switch to a flexible connection state, and abut the accelerometer (620) against the target product to detect vibration. The audio acquisition component (610) and the accelerometer (620) are both installed on the periphery of the positioning carrier (400). Drive the hysteresis brake (710) to disengage from the torque sensor (700) through the third sliding table (711), and maintain noise detection and vibration detection. The hysteresis brake (710) is installed on the third sliding table (711).

7. The no-load and loaded test method for an electric machine according to claim 6, characterized in that, Before controlling the intermediate carrier (300) to switch to a flexible connection state, it further includes: Detect torque through the torque sensor (700), and / or detect rotational speed through the photoelectric sensor (730) and the code disk (720). The code disk (720) is connected to the torque sensor (700), and the photoelectric sensor (730) is arranged adjacent to the code disk (720) and faces the code disk (720).

8. The motor no-load and load testing method according to claim 7, characterized in that: Before controlling the intermediate carrier (300) to switch to a flexible connection state, it further includes: Abut the displacement sensor (630) against the rotating shaft of the target product to detect shaft yaw. The displacement sensor (630) is arranged on the periphery of the positioning carrier (400).

9. The no-load and loaded test method for an electric machine according to claim 8, wherein 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 further comprising: 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 no-load and loaded test method for the motor 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 further comprising: 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 (220) to move via the slide drive mechanism (221) so as to separate the torque sensor (700) 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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