CN111089734A - Automatic test system for automobile bearing performance test - Google Patents
Automatic test system for automobile bearing performance test Download PDFInfo
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- CN111089734A CN111089734A CN201911391151.3A CN201911391151A CN111089734A CN 111089734 A CN111089734 A CN 111089734A CN 201911391151 A CN201911391151 A CN 201911391151A CN 111089734 A CN111089734 A CN 111089734A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
- G01M13/045—Acoustic or vibration analysis
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- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
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Abstract
The invention relates to an automatic test system for testing the performance of an automobile bearing, which comprises a power supply, an upper computer, a motor driver and a motor, wherein the upper computer is connected with the power supply; the power supply is respectively electrically connected with the upper computer, the motor driver and the motor, and the upper computer is electrically connected with the motor through the motor driver. The upper computer sends system parameters and test tasks to the motor driver, the motor driver drives the motor to operate according to the system parameters and the test tasks sent by the upper computer, automatic test of bearing performance is achieved, higher-requirement durability test conditions can be met, and compared with a traditional test system for testing the bearing by controlling a servo motor in a PLC pulse sending mode, the test system greatly improves test efficiency and obviously improves control accuracy of angles and torque.
Description
Technical Field
The invention relates to the technical field of automobile safety and part testing, in particular to an automatic testing system for automobile bearing performance testing.
Background
With the increasing demand of people on automobile safety, higher requirements are placed on the performances of automobile parts, so that the automobile parts are required to have higher durability, and corresponding durability tests also have higher requirements.
The bearing is used as a core component of an automobile part, and the durability performance of the bearing is not ignored. In order to better test the higher required durability of the bearing, the requirements of the corresponding test system are also obviously improved, including the test efficiency of the test system and the control precision of the angle and the torque.
However, in a traditional test system for testing the performance of a bearing by controlling a servo motor in a way of sending pulses by a PLC, a torque sensor is required to test the torque of a load, a sensor with high cost is required to ensure the accuracy of the torque, and the sensor is connected to the system in a way of analog quantity, so that the accuracy is increasingly poor along with the increase of the detection range. Therefore, the existing bearing test system cannot meet the requirement of durability test, has low test efficiency, low control precision on angle and torque and low automation degree.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an automatic test system for testing the performance of the automobile bearing, aiming at the defects of the prior art, the automatic test system can meet the durability test with higher requirements, greatly improve the test efficiency, obviously improve the control precision of the angle and the torque and have high automation degree.
The technical scheme for solving the technical problems is as follows:
an automatic test system for automobile bearing performance test comprises a power supply, an upper computer, a motor driver and a motor;
the power supply is respectively electrically connected with the upper computer, the motor driver and the motor, and the upper computer is electrically connected with the motor through the motor driver.
The invention has the beneficial effects that: the power supply respectively supplies power for equipment such as an upper computer, a motor driver, a motor and the like; the upper computer is responsible for reading and writing the whole system parameters and is also used for issuing system parameters and test tasks to the motor driver; the motor driver drives the motor to operate according to the system parameters and the test tasks issued by the upper computer, so as to realize the automatic test of the bearing performance;
compared with the traditional test system for testing the bearing by controlling the servo motor in a PLC pulse sending mode, the test system with the structure can automatically test the durability of the bearing, has higher automation degree, can meet the durability test condition with higher requirement, greatly improves the test efficiency, obviously improves the control precision of the angle and the torque, and can ensure that the control precision of the angle is within 0.001 degree and the control precision of the torque is within 0.1Nm under the conditions of high frequency and low frequency.
On the basis of the technical scheme, the invention also has the following improvements:
further: also includes a display;
the display is electrically connected with the power supply and the upper computer respectively.
The beneficial effects of the further technical scheme are as follows: the upper computer is responsible for reading and writing the parameters of the whole system and is also used for issuing the system parameters and the test tasks to the motor driver, so that the operation interface of the upper computer can be conveniently displayed through the display electrically connected with the upper computer, a man-machine interaction interface between the upper computer and a user is formed, the system parameters and the test tasks are dynamically displayed, and the bearing durability test is more flexible and convenient.
Further: the energy feedback circuit is also included;
the energy feedback circuit is electrically connected with the power supply and the motor driver respectively.
The beneficial effects of the further technical scheme are as follows: because the motor always rotates forward and backward at high frequency, the energy generated during the deceleration of the motor can not be consumed, so that the braking resistance of the whole test system is dozens of kilowatts, the overcurrent accident is easy to occur, and the bearing is easily damaged, so the energy-saving problem in the existing test system is always a difficult problem which troubles the development of the high-frequency forward and backward rotation technology; the energy feedback circuit is electrically connected with the motor driver, and feeds the energy generated during the motor deceleration back to the power supply side, so that the system can efficiently utilize the energy generated during the rapid acceleration and deceleration, the remarkable energy-saving purpose is achieved, the braking torque response action is rapid, and the damage to the bearing can be effectively prevented.
Further: the device also comprises an encoder;
the encoder is electrically connected with the motor driver and the motor respectively.
The beneficial effects of the further technical scheme are as follows: the encoder can measure the real-time angle and torque in the testing process, so that on one hand, the control precision of the whole testing system on the angle and the torque can be ensured, the precision is higher, and the control on the positive rotation and the reverse rotation of the motor is more accurate; on the other hand, the motor can be protected in forward rotation and reverse rotation through an angle protection threshold and a torque protection threshold which are arranged in the upper computer, so that the bearing is protected from being damaged in the testing process.
Further: also includes a power supply auxiliary circuit;
the power supply is electrically connected with the upper computer, the motor driver and the motor respectively through the power supply auxiliary circuit.
Further: the power auxiliary circuit comprises a first circuit breaker, a transformer, a filter and a second circuit breaker;
the power supply sequentially passes through the first circuit breaker, the transformer, the filter and the second circuit breaker and is respectively electrically connected with the upper computer, the motor driver and the motor.
The beneficial effects of the further technical scheme are as follows: the first circuit breaker is a main power switch of the whole system, and the on and off of a main power supply are conveniently controlled by the first circuit breaker; the transformer sequentially connected with the first circuit breaker is convenient for isolating and reducing the alternating voltage input to the upper computer, effectively shielding interference and protecting the whole test system; harmonic interference in the test system can be effectively eliminated through the filter sequentially connected with the transformer, and the stability and reliability of the whole test system are improved; finally, the second circuit breaker sequentially connected with the filter is convenient for controlling the on and off of equipment such as an upper computer, a motor driver, a motor and the like; through the power auxiliary circuit of above-mentioned structure, can guarantee going on smoothly to bearing durability test on the one hand, on the other hand can also improve stability and the reliability to bearing durability test, and then help improving efficiency of software testing and the control accuracy to angle and moment of torsion.
Further: also includes a cooling fan;
the cooling fan is electrically connected with the second circuit breaker and the upper computer respectively.
The beneficial effects of the further technical scheme are as follows: the heat dissipation performance of the upper computer can be obviously improved through the cooling fan, so that the stability and the reliability of the whole test system are improved.
Further: the device also comprises a switching power supply;
the switching power supply is electrically connected with the second circuit breaker and the motor driver respectively.
The beneficial effects of the further technical scheme are as follows: the alternating current is rectified into direct current by a switching power supply so as to provide the direct current required by electric equipment such as a motor driver.
Drawings
FIG. 1 is a schematic structural diagram of an automated testing system for testing the performance of an automobile bearing according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another automated testing system for testing the performance of an automobile bearing according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a communication link of an automated testing system for testing the performance of an automobile bearing according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an automated testing system for testing the performance of an automobile bearing according to another embodiment of the present invention;
FIG. 5 is a schematic electrical schematic diagram of an automated testing system for testing the performance of an automobile bearing according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the power supply comprises a power supply, 2, an upper computer, 3, a motor driver, 4, a motor, 5, a display, 6, an energy feedback circuit, 7, an encoder, 8, a power supply auxiliary circuit, 9, a cooling fan, 10, a switching power supply, 81, a first circuit breaker, 82, a transformer, 83, a filter, 84 and a second circuit breaker.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The present invention will be described with reference to the accompanying drawings.
In the first embodiment, as shown in fig. 1, an automatic test system for automobile bearing performance test includes a power supply 1, an upper computer 2, a motor driver 3 and a motor 4;
the power supply 1 is respectively electrically connected with the upper computer 2, the motor driver 3 and the motor 4, and the upper computer 2 is electrically connected with the motor 4 through the motor driver 3.
Compared with a traditional test system for testing a bearing by controlling a servo motor in a PLC pulse sending mode, the test system formed by the structure can automatically test the durability of the bearing, has higher automation degree, can meet the durability test condition with higher requirement, greatly improves the test efficiency, obviously improves the control precision of angles and torque, can ensure that the control precision of the angles is within 0.001 degree no matter under the conditions of high frequency and low frequency, and ensures that the control precision of the torque is within 0.1 Nm.
The working principle of the automatic testing system for the automobile bearing performance test of the embodiment is as follows:
the power supply respectively supplies power for equipment such as an upper computer, a motor driver, a motor and the like; the upper computer is responsible for reading and writing the whole system parameters and is also used for issuing system parameters and test tasks to the motor driver; and the motor driver drives the motor to operate according to the system parameters and the test tasks issued by the upper computer, so that the automatic test of the performance of the clutch is realized.
Specifically, the upper computer in this embodiment communicates with the motor driver through the MODBUS TCP protocol, and a specific communication connection diagram is shown in fig. 3.
Preferably, as shown in fig. 2, further comprises a display 5;
the display 5 is respectively and electrically connected with the power supply 1 and the upper computer 2.
The upper computer is responsible for reading and writing the parameters of the whole system and is also used for issuing the system parameters and the test tasks to the motor driver, so that the operation interface of the upper computer can be conveniently displayed through the display electrically connected with the upper computer, a man-machine interaction interface between the upper computer and a user is formed, the system parameters and the test tasks are dynamically displayed, and the bearing durability test is more flexible and convenient.
Specifically, the display in this embodiment forms a human-computer interface between the host computer and the user, and this human-computer interface can be compiled through the VE language, and on this human-computer interface, an operation panel is provided, including a plurality of operation buttons, including a plurality of buttons such as an operation button, a stop button, an enable mode button, a forward rotation button, a reverse rotation button, a return-to-zero button, an automatic manual mode switching button, and a protection setting button, and the following functions can be realized through the above buttons:
1. enabling management: controlling whether the system is enabled or not, pressing an enabling mode button to enter an enabling mode in an un-enabled state, and after pressing the enabling mode button, defaulting the current position of the system to be a zero point; when the enable mode button is pressed in the enable state, the system cancels the enable;
2. manual function: the forward rotation button or the reverse rotation button is pressed to control the forward rotation or the reverse rotation of the motor, and the forward rotation button and the reverse rotation button are self-reset; the forward rotation angle protection and the reverse rotation angle protection can be added in the system through the protection setting button;
3. automatic function:
(1) rotating an automatic manual mode switching button to be automatic, and entering an automatic mode;
(2) pressing a running button, namely starting an automatic mode, enabling the system to enter an automatic testing state, returning to zero firstly, starting to move back and forth according to a preset testing angle and a preset pause time after returning to zero, stopping after reaching the leftmost side and the rightmost side, waiting according to a preset waiting time, then rotating forwards or reversely, counting +1 when running to the rightmost side and then running to the left side, stopping when running to a set number of times, and resetting the automatic testing;
(3) then, a stop button is pressed to enter a stop mode, and the system stops after running to the zero point;
4. and (3) zero returning function: when a zero returning button is pressed down or a running button is pressed down in an automatic mode, the system automatically enters a zero returning mode;
5. and (4) protection function: through the protection setting button, the protection value can be set for the torque and the amplitude, and the product is protected from being damaged accidentally.
Preferably, as shown in fig. 2, the system further comprises an energy feedback circuit 6;
the energy feedback circuit 6 is electrically connected with the power supply 1 and the motor driver 3 respectively.
Because the motor always rotates forward and backward at high frequency, the energy generated during the deceleration of the motor can not be consumed, so that the braking resistance of the whole test system is dozens of kilowatts, the overcurrent accident is easy to occur, and the bearing is easily damaged, so the energy-saving problem in the existing test system is always a difficult problem which troubles the development of the high-frequency forward and backward rotation technology; the energy feedback circuit is electrically connected with the motor driver, and feeds the energy generated during the motor deceleration back to the power supply side, so that the system can efficiently utilize the energy generated during the rapid acceleration and deceleration, the remarkable energy-saving purpose is achieved, the braking torque response action is rapid, and the damage to the bearing can be effectively prevented.
Specifically, the energy feedback circuit in this embodiment is specifically an energy feedback unit, and an energy feedback unit of an appropriate model, for example, an energy feedback unit of a BKF800-DF-045-6HE model produced by a shenzhen shell power supply, may be selected according to actual parameters.
Preferably, as shown in fig. 2, an encoder 7 is further included;
the encoder 7 is electrically connected to the motor driver 3 and the motor 4, respectively.
The encoder can measure the real-time angle and torque in the testing process, so that on one hand, the control precision of the whole testing system on the angle and the torque can be ensured, the precision is higher, and the control on the positive rotation and the reverse rotation of the motor is more accurate; on the other hand, the motor can be protected in forward rotation and reverse rotation through an angle protection threshold and a torque protection threshold which are arranged in the upper computer, so that the bearing is protected from being damaged in the testing process.
Specifically, the motor driver of this embodiment specifically employs a AXN50.100.4-type servo amplifier, which is a driver capable of being directly programmed on the driver, and the driver itself has 8 digital inputs, 4 digital outputs, 4 single-ended 0-10V input analog outputs, and 2 single-ended 0-10V analog outputs, which can completely meet the requirements of this system; the software platform used by the servo amplifier supports a task grading function, the highest fast task can reach 0.0625ms, the task with higher real-time requirement can be preferentially met, and the highest slow task can reach 1ms, so that the task with low real-time requirement can be met; the motor of this embodiment specifically adopts the servo motor of U31010F203 model, and the encoder adopts the absolute value encoder that has outage memory function, and the precision is higher, and control is more accurate.
Preferably, as shown in fig. 4, a power auxiliary circuit 8 is further included;
the power supply 1 is electrically connected with the upper computer 2, the motor driver 3 and the motor 4 through the power supply auxiliary circuit 8 respectively.
Preferably, as shown in fig. 4 and 5, the power auxiliary circuit 8 comprises a first circuit breaker 81, a transformer 82, a filter 83 and a second circuit breaker 84;
the power supply 1 sequentially passes through the first circuit breaker 81, the transformer 82, the filter 83 and the second circuit breaker 84, and is electrically connected with the upper computer 2, the motor driver 3 and the motor 4 respectively.
The first circuit breaker is a main power switch of the whole system, and the on and off of a main power supply are conveniently controlled by the first circuit breaker; the transformer sequentially connected with the first circuit breaker is convenient for isolating and reducing the alternating voltage input to the upper computer, effectively shielding interference and protecting the whole test system; harmonic interference in the test system can be effectively eliminated through the filter sequentially connected with the transformer, and the stability and reliability of the whole test system are improved; finally, the second circuit breaker sequentially connected with the filter is convenient for controlling the on and off of equipment such as an upper computer, a motor driver, a motor and the like; through the power auxiliary circuit of above-mentioned structure, can guarantee going on smoothly to bearing durability test on the one hand, on the other hand can also improve stability and the reliability to bearing durability test, and then help improving efficiency of software testing and the control accuracy to angle and moment of torsion.
Specifically, as shown in fig. 5, the first circuit breaker in this embodiment adopts a circuit breaker of 70A standard, the second circuit breaker adopts a circuit breaker of 50A standard, the transformer is specifically a three-phase transformer of 380V to 220V and 4.5KVA standard, and the filter is specifically an ac filter of CIMB-20A standard.
Preferably, as shown in fig. 5, a cooling fan 9 is further included;
the cooling fan 9 is electrically connected to the second circuit breaker 84 and the upper computer 2, respectively.
The heat dissipation performance of the upper computer can be obviously improved through the cooling fan, so that the stability and the reliability of the whole test system are improved.
Preferably, as shown in fig. 5, a switching power supply 10 is further included;
the switching power supply 10 is electrically connected to the second circuit breaker 84 and the motor driver 3, respectively.
The alternating current is rectified into direct current by a switching power supply so as to provide the direct current required by electric equipment such as a motor driver.
Specifically, the switching power supply of the present embodiment is a dc switching power supply with specification of 220V to 24V and 5A.
Specifically, before the durability test of the bearing is performed by using the test system of the present embodiment, the following debugging steps need to be performed:
sa 1: wiring according to the electrical schematic shown in fig. 5;
sa 2: a power supply is connected;
sa 3: downloading a control program;
sa 4: downloading motor driver parameters and carrying out motor PID debugging;
sa 5: testing each input/output point to verify whether the external encoder is correct or not;
sa 6: switching in strong current;
sa 7: testing system communication signals;
sa 8: verifying the main functions of the system;
sa 9: the system is in no-load test operation;
sa 10: and (5) carrying out test operation on the system.
After the debugging step is completed, starting to perform performance test on the automobile bearing test product, wherein the specific operation steps in the test process are as follows:
sb 1: turning on a main power switch, and powering on the system;
sb 2: fixing the test product;
sb 3: setting equipment parameters, an amplitude angle, test times, a protection torque and a protection angle through a protection setting button;
sb 4: pressing an enabling mode button on a human-computer interaction interface, and enabling the system to enter an enabling mode;
sb 5: rotating an automatic manual mode switching button on a human-computer interaction interface to an automatic mode, and entering the automatic mode;
sb 6: pressing an operation button on the human-computer interaction interface, and enabling the system to return to a zero point and then start to rotate forwards and backwards according to a preset amplitude;
sb 7: when the testing times reach the preset testing times or a stop button of the human-computer interaction interface is pressed, stopping the system;
sb 8: rotating an automatic manual mode switching button on a human-computer interaction interface to a manual mode, and entering the manual mode;
sb 9: then pressing an enabling mode button on the human-computer interaction interface, and canceling enabling of the system;
sb 10: and taking down the test product to finish the test.
In the traditional test system, the position control precision is 0.01mm at low frequency, the torque control precision is within 1N, and the control precision cannot be ensured at high frequency; in addition, the conventional test system cannot customize the functions according to the customer, but the embodiment can customize the functions according to the customer requirements, for example, by setting the protection torque and the protection angle, the system protection function is realized, and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. An automatic test system for automobile bearing performance test is characterized by comprising a power supply (1), an upper computer (2), a motor driver (3) and a motor (4);
the power supply (1) is respectively connected with the upper computer (2), the motor driver (3) and the motor (4) electrically, and the upper computer (2) is connected with the motor (4) electrically through the motor driver (3).
2. The automated testing system for automotive bearing performance testing of claim 1, further comprising a display (5);
the display (5) is electrically connected with the power supply (1) and the upper computer (2) respectively.
3. The automated testing system for automotive bearing performance testing of claim 1, further comprising an energy feedback circuit (6);
the energy feedback circuit (6) is respectively and electrically connected with the power supply (1) and the motor driver (3).
4. The automated testing system for automotive bearing performance testing of claim 1, further comprising an encoder (7);
the encoder (7) is electrically connected with the motor driver (3) and the motor (4) respectively.
5. The automated testing system for automotive bearing performance testing according to any one of claims 1 to 4, characterized by further comprising a power auxiliary circuit (8);
the power supply (1) is electrically connected with the upper computer (2), the motor driver (3) and the motor (4) through the power supply auxiliary circuit (8).
6. The automated testing system for automotive bearing performance testing of claim 5, characterized in that the power auxiliary circuit (8) comprises a first circuit breaker (81), a transformer (82), a filter (83) and a second circuit breaker (84);
the power supply (1) sequentially passes through the first circuit breaker (81), the transformer (82), the filter (83) and the second circuit breaker (84), and is respectively electrically connected with the upper computer (2), the motor driver (3) and the motor (4).
7. The automated testing system for automotive bearing performance testing of claim 6, further comprising a cooling fan (9);
and the cooling fan (9) is electrically connected with the second circuit breaker (84) and the upper computer (2) respectively.
8. The automated testing system for automotive bearing performance testing of claim 6, further comprising a switching power supply (10);
the switching power supply (12) is electrically connected to the second circuit breaker (84) and the motor driver (3), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911391151.3A CN111089734A (en) | 2019-12-30 | 2019-12-30 | Automatic test system for automobile bearing performance test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911391151.3A CN111089734A (en) | 2019-12-30 | 2019-12-30 | Automatic test system for automobile bearing performance test |
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| CN111089734A true CN111089734A (en) | 2020-05-01 |
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| CN201911391151.3A Pending CN111089734A (en) | 2019-12-30 | 2019-12-30 | Automatic test system for automobile bearing performance test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113866535A (en) * | 2021-08-26 | 2021-12-31 | 深圳市研控自动化科技有限公司 | Drive zero-returning test method, device, equipment, medium and computer program product |
-
2019
- 2019-12-30 CN CN201911391151.3A patent/CN111089734A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113866535A (en) * | 2021-08-26 | 2021-12-31 | 深圳市研控自动化科技有限公司 | Drive zero-returning test method, device, equipment, medium and computer program product |
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