A testing device and testing method for electric control opening degree adjustment system of a harvester cleaning screen

Abstract

A kind of harvester cleaning screen electric control opening degree regulating system testing device and testing method, it relates to agricultural harvesting machinery testing equipment technical field, its structure includes test bench, sensor assembly and industrial control host computer.Testing bench includes rack, is set on rack and can reciprocating motion test installation platform, platform is equipped with screen plate, electric control actuator, load unit.Sensor assembly is used to detect the load force sensor of load unit exerted load force, is used to detect the reciprocating motion speed sensor of eccentric drag shaft rotation speed.Industrial control host computer is used to record result.Its method includes:1, installation to be measured with sensor and self-checking;2, static opening degree execution precision test;3, with load adjustment capability test;4, durability test;5, save test result.Application of the present application can solve the existing cleaning screen electric control opening degree regulating system test existing effect consistency is poor, efficiency is low, and it is difficult to meet the technical problems of systematization, standardization development.

Description

Technical Field

[0001] This invention relates to the field of agricultural harvesting machinery testing equipment technology, specifically to a testing device and testing method for a harvester cleaning screen electronic control opening adjustment system. Background Technology

[0002] With the continuous development of grain combine harvester technology, modern harvesters have incorporated more and more electronically controlled actuators compared to traditional models, making parameter adjustment of the working device more convenient and efficient. However, the widespread application of electronic control systems has also brought challenges in terms of reliability and consistency. As a core component in the grain cleaning process, the performance of the cleaning sieve directly affects the final harvest quality. Therefore, effectively testing the reliability and mechanical performance consistency of the cleaning sieve's electronic control opening adjustment system has become a crucial aspect of harvester development.

[0003] Currently, testing of the electronically controlled opening adjustment system for cleaning screens mainly relies on actual vehicle testing conducted by testing or development personnel after the prototype is developed. The test results and related calibration parameters obtained in this way are often affected by the subjective experience and judgment of the testers, resulting in poor consistency and low efficiency in test results, making it difficult to meet the needs of systematic and standardized development. Summary of the Invention

[0004] The purpose of this invention is to provide a testing device and method for the electric control opening adjustment system of a harvester cleaning screen, which can solve the technical problems of poor consistency of effect, low efficiency, and difficulty in meeting the requirements of systematic and standardized development in the existing testing of electric control opening adjustment systems for cleaning screens.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A test device for an electrically controlled opening adjustment system of a harvester cleaning screen includes a test bench, sensor components, and an industrial control host computer.

[0007] The test bench includes a frame, on which a test mounting plate is provided for connecting the sieve plate to be tested and the electrical control actuator to be tested. The test mounting plate is connected to the frame via an eccentric drive shaft, which is driven by a drive unit located on the frame to realize the reciprocating motion of the test mounting plate to simulate the actual working conditions of the sieve plate.

[0008] The test mounting platform is equipped with a load unit. One end of the drive shaft of the sieve plate is connected to the electronic control actuator, which is used to drive the drive shaft through the electronic control actuator to adjust the opening of the sieve plate. The other end of the drive shaft is connected to the load unit to apply a load to the sieve plate.

[0009] The sensor assembly includes an opening detection sensor for detecting the opening degree of the sieve plate, an actuator force sensor for detecting the driving force of the electronically controlled actuator, a current sensor for detecting the operating current of the electronically controlled actuator, a load force sensor for detecting the load applied by the load unit, and a reciprocating motion speed sensor for detecting the rotational speed of the eccentric drive shaft.

[0010] The industrial control host computer is connected to the electrical control actuator, drive unit, load unit, and sensor components to realize manual control of parameters such as the opening of the test bench sieve plate, the applied load, and the reciprocating motion frequency, as well as the recording of operation data and the acquisition and recording of sensor data.

[0011] Furthermore, the electronically controlled actuator is a DC motor, stepper motor, electric push rod, or electric hydraulic cylinder, and the force sensor of the actuator is located at the connection between the electronically controlled actuator and the drive shaft.

[0012] Furthermore, multiple opening detection sensors are distributed on the sieve plate to accurately detect the opening degree of the sieve plate.

[0013] Furthermore, the load unit is a load motor, and the load force sensor is located at the connection between the load unit and the drive shaft.

[0014] Furthermore, the drive unit is a drive motor, and the reciprocating speed sensor is located at the connection between the eccentric drive shaft and the frame rotation.

[0015] A test method for a harvester cleaning screen electronic control opening adjustment system, based on the above-mentioned test device, includes the following steps: S1. Install the sieve plate to be tested and the electrical control actuator to be tested onto the test mounting plate, install the sensor assembly, and perform self-test; S2. Static opening accuracy test: The upper computer controls the electric control actuator to drive the screen plate to multiple different openings, and the opening detection sensor detects the actual opening value of the screen plate. S3. Load adjustment capability test: The load unit applies a load to the screen plate, and the upper computer controls the electric control actuator to continuously adjust the opening of the screen plate. The opening detection sensor, the actuator force sensor, the current sensor, and the load force sensor detect the real-time opening value of the screen plate, the real-time driving force and working current of the electric control actuator, and the real-time load force of the load unit. S4. Durability test: The test mounting plate is driven by the drive unit to reciprocate. The upper computer controls the electric control actuator to drive the screen plate to a random opening at regular intervals. The actual opening value of the screen plate is detected by the opening detection sensor. S5. Save the test results.

[0016] Furthermore, in step S2, the upper computer controls the electronically controlled actuator to drive the screen plate to multiple different opening degrees, including: S21. The sieve plate is driven sequentially to the preset opening degrees of 0%, 25%, 50%, 75%, and 100% by the electronic control actuator. S22. After the sieve plate reaches 100% opening, the sieve plate is driven sequentially to the preset opening of 100%, 75%, 50%, 25% and 0% by the electric control actuator.

[0017] Furthermore, in step S3, the opening of the screen plate is continuously adjusted by controlling the electronically controlled actuator via the host computer, including: S31. The sieve plate is continuously driven from 0% opening to 100% opening via an electronically controlled actuator; S32. After the sieve plate reaches 100% opening, the sieve plate is continuously driven from 100% opening to 0% opening through the electric control actuator.

[0018] Furthermore, when applying a load, the increase in the sieve plate opening is taken as the positive direction. During the process of increasing the sieve plate opening, the load unit applies a load in the opposite direction, and during the process of decreasing the sieve plate opening, the load unit applies a load in the positive direction.

[0019] Furthermore, in step S4, when the test mounting plate is driven to reciprocate using the drive unit, the reciprocating frequency of the test mounting plate is monitored in real time by the reciprocating speed sensor to ensure that it is consistent with the preset working conditions.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects: 1. This invention employs a modular testing device and a standardized testing process, and uses sensor detection data as the basis for experimental results, effectively avoiding the problems of large detection errors and poor consistency of test results caused by human subjective experience and judgment. 2. This invention can independently conduct targeted testing on the electronic control opening adjustment system of the cleaning screen. Compared with whole vehicle testing, it is not only more efficient and less costly, but also shortens the R&D and testing cycle of the whole vehicle. 3. This invention can not only verify the design and development of the cleaning screen electronic opening adjustment system during the whole vehicle design process, but also independently verify subsequent improvement schemes. It is especially suitable for frequent adjustments to the scheme during cost control and quality improvement, and can quickly and effectively conduct experimental verification. 4. The testing methods and steps in this invention are relatively independent, and one test can be performed individually or a comprehensive test can be performed, making the operation flexible. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the method flow of the present invention.

[0023] Figure descriptions: 11. Frame, 12. Test mounting platform, 13. Eccentric drive shaft, 14. Drive unit, 15. Load unit, 21. Opening degree detection sensor, 22. Actuator force sensor, 23. Current sensor, 24. Load force sensor, 25. Reciprocating motion speed sensor, 3. Industrial control host computer, 4. Sieve plate, 41. Drive shaft, 5. Electrically controlled actuator. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the features and performance of a test device and test method for an electronically controlled opening adjustment system for a harvester cleaning screen according to the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Please see the appendix Figures 1-2 A test device for an electrically controlled opening adjustment system of a harvester cleaning screen includes a test stand, sensor components and an industrial control host computer 3.

[0026] The test bench includes a frame 11, on which a test mounting plate 12 is provided for connecting the sieve plate 4 to be tested and the electronically controlled actuator 5 to be tested. The test mounting plate 12 has various sizes of mounting interfaces and hanging fixing points. The test mounting plate 12 is connected to the frame 11 via an eccentric drive shaft 13, which is driven by a drive unit 14 mounted on the frame 11 to realize the reciprocating motion of the test mounting plate 12 to simulate the actual shaking condition of the sieve plate 4. The drive unit 14 is a drive motor. In particular, the electronically controlled actuator 5 is a mechanism capable of adjusting the opening of the sieve plate 4, and can be a DC motor, stepper motor, electric push rod, or electro-hydraulic cylinder, etc. Preferably, in this invention, the electronically controlled actuator 5 is an electric push rod.

[0027] The test mounting platform 12 is equipped with a load unit 15. One end of the drive shaft 41 of the sieve plate 4 is connected to the electric control actuator 5, which is used to drive the drive shaft 41 through the electric control actuator 5 to adjust the opening of the sieve plate 4. The other end of the drive shaft 41 is connected to the load unit 15 to apply a load to the sieve plate 4, simulating the load situation of the sieve plate 4 at different openings and the force caused by mechanical friction under actual working conditions. The load unit 15 is a load motor.

[0028] The sensor assembly includes an opening detection sensor 21 for detecting the opening degree of the sieve plate 4, an actuator force sensor 22 for detecting the driving force of the electronically controlled actuator 5, a current sensor 23 for detecting the operating current of the electronically controlled actuator 5, a load force sensor 24 for detecting the load applied by the load unit 15, and a reciprocating motion speed sensor 25 for detecting the rotational speed of the eccentric drive shaft 13. The actuator force sensor 22 is located at the connection between the electronically controlled actuator 5 and the drive shaft 41, the load force sensor 24 is located at the connection between the load unit 15 and the drive shaft 41, and the reciprocating motion speed sensor 25 is located at the rotational connection between the eccentric drive shaft 13 and the frame 11. Specifically, multiple opening detection sensors 21 are distributed on the sieve plate 4 to accurately detect the opening degree of the sieve plate 4. Preferably, four opening detection sensors 21 are distributed on the sieve plate 4 to detect the characteristic positions of four different areas within the controllable region of the sieve plate 4, ensuring accurate and reliable opening state detection.

[0029] The industrial control host computer 3 is connected to the electrical control actuator 5, drive unit 14, load unit 15, and sensor assembly circuitry for human-machine interaction. This allows for manual control of parameters such as the test bench's sieve opening, applied load, and reciprocating motion frequency, as well as the recording of operational data and the acquisition and recording of sensor data. The industrial control host computer 3 has built-in multi-process automated testing software and can display data in real time via an operation display screen.

[0030] A test method for a harvester cleaning screen electronic control opening adjustment system, based on the above-mentioned test device, includes the following steps.

[0031] S1. Install the sieve plate 4 and the electrical control actuator 5 to be tested onto the test mounting plate 12, install the sensor assembly, and perform self-test.

[0032] S2. Static opening accuracy test: The upper computer controls the electric control actuator 5 to drive the screen plate 4 to multiple different openings, and the opening detection sensor 21 detects the actual opening value corresponding to the screen plate 4.

[0033] The upper computer controls the electronically controlled actuator 5 to drive the sieve plate 4 to multiple different opening degrees, including: S21. The sieve plate 4 is driven sequentially to the preset opening degrees of 0%, 25%, 50%, 75%, and 100% by the electric control actuator 5. S22. After the sieve plate 4 reaches 100% opening, the sieve plate 4 is driven sequentially to the preset opening of 100%, 75%, 50%, 25% and 0% by the electric control actuator 5.

[0034] Specifically, in the static opening accuracy test process, the control accuracy of the electronically controlled actuator 5 depends on the accuracy level required by the user. In this embodiment, five levels of accuracy control—0%, 25%, 50%, 75%, and 100% opening—are used as examples for illustration. The opening control data parameters calibrated accordingly can be used in the overall vehicle control logic to improve the control accuracy of the harvester cleaning screen's electronically controlled opening adjustment system.

[0035] S3. Load adjustment capability test: The load unit 15 applies a load to the screen plate 4. The upper computer controls the electric control actuator 5 to continuously adjust the opening of the screen plate 4. The opening detection sensor 21, the actuator force sensor 22, the current sensor 23, and the load force sensor 24 detect the real-time opening value of the screen plate 4, the real-time driving force and working current of the electric control actuator 5, and the real-time load force of the load unit 15.

[0036] The process of continuously adjusting the opening of the screen plate 4 via the host computer-controlled electronic actuator 5 includes: S31. The sieve plate 4 is continuously driven from 0% opening to 100% opening through the electronically controlled actuator 5; S32. After the sieve plate 4 reaches 100% opening, the sieve plate 4 is continuously driven from 100% opening to 0% opening by the electric control actuator 5.

[0037] Specifically, when applying a load, the increase of the opening of the sieve plate 4 is taken as the positive direction. During the process of increasing the opening of the sieve plate 4, the load unit 15 applies a load in the opposite direction, and during the process of decreasing the opening of the sieve plate 4, the load unit 15 applies a load in the positive direction.

[0038] S4. Durability test: The test mounting plate 12 is driven by the drive unit 14 to reciprocate. The upper computer controls the electric control actuator 5 to drive the screen plate 4 to a random opening at regular intervals. The actual opening value of the screen plate 4 is detected by the opening detection sensor 21.

[0039] When the test mounting platform 12 is driven by the drive unit 14 to perform reciprocating motion, the reciprocating frequency of the test mounting platform 12 is monitored in real time by the reciprocating motion speed sensor 25 to ensure that it is consistent with the preset working conditions.

[0040] S5. Save the test results.

[0041] In specific implementation, such as Figure 1 As shown, a test device for the electric control opening adjustment system of a harvester cleaning screen is provided. The frame 11 is fixed on the floor of the test area, leveled with anchor bolts, and a shock-absorbing pad is added to reduce vibration during the test.

[0042] The test mounting plate 12 is mounted on the frame 11 via an eccentric drive shaft 13. The eccentric drive shaft 13 is connected to the drive unit 14. A reciprocating motion speed sensor 25 is installed behind the eccentric drive shaft 13. The test mounting plate 12 has mounting holes for the screen plate 4 to be tested, and the screen plate 4 is mounted by bolts.

[0043] The test mounting platform 12 is also equipped with a load unit 15, which is a servo motor used to apply the load. It is connected to the drive shaft 41 of the sieve plate 4 via a load force sensor 24. The other end is equipped with a test-controlled electric actuator 5. In this embodiment, the electric actuator 5 uses an electric push rod, which is connected to the drive shaft 41 of the sieve plate 4 via an actuator force sensor 22. The power supply system supplies power to the electric actuator 5 via a current sensor 23. Four opening detection sensors 21 are distributed at random feature points within the controllable area of ​​the sieve plate 4 and are fixed using clamps.

[0044] The entire test bench is connected to the industrial control host computer 3 via the main wiring harness. The industrial control host computer 3 can acquire all sensor data and control various actuators to perform actions.

[0045] A test method for the electrically controlled opening adjustment system of a harvester cleaning screen, such as... Figure 2 As shown, it includes the following steps.

[0046] S1. Install the device under test. Reliably install the sieve plate 4 and the electronically controlled actuator 5 under test on the test mounting platform 12, and connect the electronically controlled actuator 5 and the load unit 15 to the drive shaft 41 of the sieve plate 4 respectively. Install the opening degree detection sensor 21, the actuator force sensor 22, and the load force sensor 24. The installation position of the opening degree detection sensor 21 is selected from the characteristic positions of four different areas of the controllable area on the sieve surface of the sieve plate 4. The load force sensor 24 should be collinear or equivalently collinear with the direction of the force.

[0047] Preparations and basic verifications are carried out, including power supply debugging of the test bench, power-on and program operation self-test of the industrial control host computer 3, self-test of drive unit 14, self-test of load unit 15, self-test of electrical control actuator 5, and self-test of sensors.

[0048] S2: Static opening accuracy test. With the screen plate 4 horizontally placed and stationary with no relative movement, the control actuator 5 gradually increases the opening by 0%, 25%, 50%, 75%, and 100% of the designed stroke. The actual opening value is obtained and recorded by the opening detection sensor 21 installed on the screen plate 4. Then, the opening is gradually decreased by 100%, 75%, 50%, 25%, and 0% of the designed stroke, and the actual opening value is recorded. The opening control data is calibrated and repeated 5 times to verify whether the opening accuracy meets the design requirements and whether the mechanical clearance of the screen plate 4 meets the standard. The static adjustment error is output.

[0049] S3. Load Adjustment Capability Test: Keep the sieve plate 4 horizontally placed and stationary with no relative movement. Taking the increase of the sieve plate opening as the positive direction, control the electronic actuator 5 to slowly open the sieve plate 4 from 0% to 100% within a preset time. The time is input by the industrial control host computer 3 according to design requirements. During this process, the load unit 15 applies a counter-force. Then, slowly close the sieve plate 4 from 100% to 0% within a preset time. During this process, the load unit 15 applies a positive force. Obtain the actual opening value, actual load force, actual force of the electronic actuator 5, and operating current information from the sensor feedback and record them in a table. Based on the process data, determine whether the output load capacity meets the standard, whether the static friction of the sieve plate 4 meets the standard, and the output load adjustment error.

[0050] S4, the drive unit 14 is turned on, causing the sieve plate 4 to reciprocate according to the preset working speed and durability test time. During this period, the control electric actuator 5 executes a command to periodically and randomly change the opening value of the sieve plate 4 every 5 minutes. The industrial control host computer 3 collects and records the actual opening value changes of the sieve plate 4 at the corresponding time, judges whether the durability test meets the standard based on the process data, and outputs the actual adjustment error.

[0051] S5. Save the above test results to the industrial control host computer 3 storage system, and output a test report based on the results generated in the above experimental process.

[0052] In the above steps, S2 to S4 can be performed independently. The industrial control host computer 3 can generate a test report independently based on the experimental process data, which is flexible, adaptable, and highly practical.

[0053] It should be noted that the parts not described in detail in this solution are all prior art. The above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A testing device for an electrically controlled opening adjustment system of a harvester cleaning screen, characterized in that, Includes test bench, sensor components and industrial control host computer (3). The test bench includes a frame (11), on which a test mounting plate (12) is provided for connecting the sieve plate (4) to be tested and the electrical control actuator (5) to be tested. The test mounting plate (12) is connected to the frame (11) via an eccentric drive shaft (13). The eccentric drive shaft (13) is driven by a drive unit (14) located on the frame (11) to realize the reciprocating motion of the test mounting plate (12) to simulate the actual working conditions of the sieve plate (4). The test mounting platform (12) is equipped with a load unit (15). One end of the drive shaft (41) of the sieve plate (4) is connected to the electric control actuator (5) to adjust the opening of the sieve plate (4) by driving the drive shaft (41) through the electric control actuator (5). The other end of the drive shaft (41) is connected to the load unit (15) to apply a load to the sieve plate (4). The sensor assembly includes an opening detection sensor (21) for detecting the opening degree of the sieve plate (4), an actuator force sensor (22) for detecting the driving force of the electric actuator (5), a current sensor (23) for detecting the operating current of the electric actuator (5), a load force sensor (24) for detecting the load applied by the load unit (15), and a reciprocating motion speed sensor (25) for detecting the rotational speed of the eccentric drive shaft (13). The industrial control host computer (3) is connected to the electrical control actuator (5), drive unit (14), load unit (15), and sensor assembly circuit to realize the overall control of the test bench, as well as the recording of operation data and the acquisition and recording of sensor data.

2. The testing device for the electrically controlled opening adjustment system of a harvester cleaning screen as described in claim 1, characterized in that, The electric actuator (5) is a DC motor, stepper motor, electric push rod or electric hydraulic cylinder, and the force sensor (22) of the actuator is located at the connection between the electric actuator (5) and the drive shaft (41).

3. The testing device for the electrically controlled opening adjustment system of a harvester cleaning screen as described in claim 1, characterized in that, Multiple opening detection sensors (21) are distributed on the sieve plate (4) to accurately detect the opening of the sieve plate (4).

4. The testing device for the electrically controlled opening adjustment system of a harvester cleaning screen as described in claim 1, characterized in that, The load unit (15) is a load motor, and the load force sensor (24) is located at the connection between the load unit (15) and the drive shaft (41).

5. The testing device for the electrically controlled opening adjustment system of a harvester cleaning screen as described in claim 1, characterized in that, The drive unit (14) is a drive motor, and the reciprocating motion speed sensor (25) is located at the rotatable connection between the eccentric drive shaft (13) and the frame (11).

6. A test method for an electrically controlled opening adjustment system of a harvester cleaning screen, wherein the test is performed using the test device as described in claim 1, characterized in that, The testing method includes the following steps: S1. Install the sieve plate (4) to be tested and the electronic control actuator (5) to be tested onto the test mounting plate (12), install the sensor assembly, and perform self-test; S2. Static opening accuracy test: The upper computer controls the electric control actuator (5) to drive the sieve plate (4) to multiple different openings, and the opening detection sensor (21) detects the actual opening value corresponding to the sieve plate (4). S3. Load adjustment capability test: The load unit (15) is used to apply a load to the screen plate (4). The opening degree of the screen plate (4) is continuously adjusted by the upper computer controlling the electric control actuator (5). The real-time opening degree value of the screen plate (4), the real-time driving force and working current of the electric control actuator (5), and the real-time load force of the load unit (15) are detected by the opening degree detection sensor (21), the actuator force sensor (22), the current sensor (23), and the load force sensor (24). S4. Durability test: The test mounting plate (12) is driven by the drive unit (14) to reciprocate. The sieve plate (4) is driven to a random opening by the upper computer control of the electric control actuator (5) at regular intervals. The actual opening value of the sieve plate (4) is detected by the opening detection sensor (21). S5. Save the test results.

7. A test method for the electrically controlled opening adjustment system of a harvester cleaning screen as described in claim 6, characterized in that, In step S2, the upper computer controls the electronically controlled actuator (5) to drive the sieve plate (4) to multiple different opening degrees, including: S21. The sieve plate (4) is driven sequentially to the preset opening degree of 0%, 25%, 50%, 75% and 100% by the electric control actuator (5); S22. After the sieve plate (4) reaches 100% opening, the sieve plate (4) is driven sequentially to the preset 75% opening, 50% opening, 25% opening and 0% opening by the electric control actuator (5).

8. A test method for the electrically controlled opening adjustment system of a harvester cleaning screen as described in claim 6, characterized in that, In step S3, the opening of the sieve plate (4) is continuously adjusted by the host computer controlling the electronically controlled actuator (5), including: S31. The sieve plate (4) is continuously driven from 0% opening to 100% opening by the electric control actuator (5); S32. After the sieve plate (4) reaches 100% opening, the sieve plate (4) is continuously driven from 100% opening to 0% opening through the electric control actuator (5).

9. A test method for the electrically controlled opening adjustment system of a harvester cleaning screen as described in claim 8, characterized in that, When applying a load, the opening of the sieve plate (4) increases in the positive direction. During the process of the opening of the sieve plate (4) increasing, the load unit (15) applies a load in the opposite direction. During the process of the opening of the sieve plate (4) decreasing, the load unit (15) applies a load in the positive direction.

10. A test method for the electrically controlled opening adjustment system of a harvester cleaning screen as described in claim 6, characterized in that, In step S4, when the test mounting plate (12) is driven by the drive unit (14) to perform reciprocating motion, the reciprocating frequency of the test mounting plate (12) is monitored in real time by the reciprocating motion speed sensor (25) to ensure that it is consistent with the preset working conditions.

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