Transmission performance detection method, transmission system and operation machine

Abstract

The invention discloses a transmission performance detection method, a transmission system and an operation machine.The transmission performance detection method comprises the steps that the first rotating speed of a first rotating part, the second rotating speed of a second rotating part and the sampling frequency within the preset detection duration are obtained, and the first rotating part is in driving connection with the second rotating part; determining a rotating speed fluctuation index of the second rotating part according to the first rotating speed, the second rotating speed and the sampling times; and determining the transmission performance grade of the transmission system according to the rotating speed fluctuation index. The transmission performance grade is used for representing the influence of the transmission error of the transmission system on the actual rotating speed of the second rotating part, so that whether the transmission system can meet the actual operation requirement or not can be accurately evaluated; whether the structural design and the assembly precision of the transmission system can meet the transmission performance required by operation or not is detected, and the transmission performance detection and evaluation accuracy is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of transmission testing technology, specifically relating to a transmission performance testing method, a transmission system, and a working machine. Background Technology

[0002] In transmission systems, due to factors such as assembly errors and machining precision, the actual rotational speeds between two rotating components often cannot maintain a strictly proportional relationship. Taking a mechanical seeder as an example, the seeder's ground wheel rotates and drives the seed metering device to rotate through the transmission assembly. However, transmission errors can cause a significant deviation between the actual rotational speed of the seed metering device and its design speed. This speed deviation further causes periodic changes in the planting spacing, not only increasing the coefficient of variation of the qualified planting spacing in the planting spacing evaluation standard and reducing the planting quality, but also affecting the stability and reliability of the entire machine's operation. Currently, existing technologies still lack methods to effectively detect the impact of transmission errors on transmission performance, making it difficult to accurately assess whether the transmission system can meet actual operational requirements. Summary of the Invention

[0003] To address the aforementioned deficiencies or shortcomings, this invention provides a transmission performance testing method, a transmission system, and a working machine, aiming to solve the technical problem that the existing technology lacks a method to effectively detect the impact of transmission errors on transmission performance, making it difficult to accurately assess whether the transmission system can meet actual operational requirements.

[0004] To achieve the above objectives, the present invention provides a method for testing transmission performance, the method comprising: The first rotational speed of the first rotating component, the second rotational speed of the second rotating component, and the number of samplings within a preset detection time are obtained, wherein the first rotating component and the second rotating component are drivenly connected; Based on the first rotational speed, the second rotational speed, and the number of samplings, the rotational speed fluctuation index of the second rotating component is determined; The transmission performance level of the transmission system is determined based on the speed fluctuation index.

[0005] In this embodiment of the invention, the rotational speed fluctuation index of the second rotating component is determined based on the first rotational speed, the second rotational speed, and the number of samplings, including: Based on the first rotational speed, the second rotational speed, and the number of samplings, determine the root mean square error between the second rotational speed and the preset rotational speed reference value; The root mean square error (RMSE) variation coefficient is determined based on the RMSE. The transmission performance level is determined based on the root mean square error coefficient of variation.

[0006] In this embodiment of the invention, determining the root mean square error between the second rotational speed and a preset rotational speed reference value based on the first rotational speed, the second rotational speed, and the number of samplings includes: Substituting the first rotational speed, the second rotational speed, the number of samplings, and the transmission ratio between the first and second rotating components into the root mean square error (RMSE) calculation formula yields the RMSE. The RMSE calculation formula is as follows: , In the formula, The root mean square error, For the number of samples, The first rotational speed, For the second degree of rotation, This is the transmission ratio.

[0007] In this embodiment of the invention, determining the root mean square error variation coefficient based on the root mean square error includes: Substituting the root mean square error, the first rotational speed, and the transmission ratio into the formula for calculating the coefficient of variation, we obtain the root mean square error coefficient of variation. The formula for calculating the coefficient of variation is as follows: , In the formula, is the root mean square error coefficient of variation.

[0008] In this embodiment of the invention, determining the transmission performance level of the transmission system based on the speed fluctuation index includes: If the root mean square error coefficient of variation is less than the preset deviation value, the transmission performance level is determined to be qualified. If the root mean square error coefficient of variation is greater than or equal to the preset deviation value, the transmission performance level is determined to be unqualified.

[0009] In this embodiment of the invention, obtaining the first rotational speed of the first rotating component, the second rotational speed of the second rotating component, and the number of samplings within a preset detection time includes: Obtain the first speed and the second speed; The number of sampling times is determined based on the preset sampling period and the rotation period of the second rotating component.

[0010] In this embodiment of the invention, determining the number of sampling times based on a preset sampling period and the rotation period of the second rotating component includes: Substituting the preset sampling weight, preset sampling period, and rotation period into the sampling count calculation formula yields the sampling count. The sampling count calculation formula is as follows: , In the formula, For the number of samples, For the preset sampling period, For the rotation period, The preset number of times is weighted, and .

[0011] In this embodiment of the invention, the transmission performance testing method is applied to the transmission system of a working machine, wherein the working machine is a seeder, and the transmission performance testing method further includes: The preset sampling period is determined based on the seeding interval of the seeder.

[0012] To achieve the above objectives, the present invention also provides a transmission system, the transmission system comprising: The controller is configured to execute the transmission performance detection method described above; The transmission assembly includes a rotation drive, a first rotation component, and a second rotation component. The rotation drive, the first rotation component, and the second rotation component are sequentially connected and driven. The rotation drive is used to drive the first rotation component to rotate, so that the first rotation component drives the second rotation component to rotate. The detection component includes a first speed sensor and a second speed sensor. The first speed sensor is disposed on the first rotating component and is used to detect the first speed. The second speed sensor is disposed on the second rotating component and is used to detect the second speed. The first speed sensor and the second speed sensor are respectively connected to the controller for communication.

[0013] To achieve the above objectives, the present invention also provides a working machine, which includes the transmission system described above.

[0014] Through the above technical solutions, the transmission performance testing method, transmission system, and working machinery provided by the embodiments of the present invention have the following beneficial effects: In the technical solution of this invention, the transmission system includes a first rotating component and a second rotating component. The first rotating component and the second rotating component are drivenly connected, so that the first rotating component can drive the second rotating component to rotate during rotation. The actual rotation speeds of the first rotating component and the second rotating component are obtained respectively. The actual rotation speed of the first rotating component is called the first rotation speed, and the actual rotation speed of the second rotating component is called the second rotation speed. The number of samplings of the first rotation speed and the second rotation speed is obtained within a preset detection time. Based on the first rotation speed, the second rotation speed, and the number of samplings, a rotation speed fluctuation index is determined. The rotation speed fluctuation index is used to characterize the periodic fluctuation of the actual rotation speed of the second rotating component. Then, the transmission performance level can be determined according to the rotation speed fluctuation index of the second rotating component. The transmission performance level is used to characterize the influence of the transmission error of the transmission system on the actual rotation speed of the second rotating component. This facilitates accurate evaluation of whether the transmission system can meet the actual operation requirements. By obtaining the first rotation speed, the second rotation speed, and the number of samplings, it is possible to detect whether the structural design and assembly accuracy of the transmission system can meet the transmission performance required for operation, which greatly improves the accuracy of transmission performance detection and evaluation.

[0015] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. Those skilled in the art can obtain other drawings based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a flowchart illustrating the first embodiment of the transmission performance testing method according to the present invention; Figure 2 This is a flowchart illustrating step S20 in the first embodiment of the transmission performance testing method according to the present invention; Figure 3 This is a flowchart illustrating step S10 in the first embodiment of the transmission performance testing method according to the present invention; Figure 4 This is a schematic diagram of the structure of a transmission system according to an embodiment of the present invention; Figure 5 This is a structural block diagram of a transmission system according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] The transmission performance testing method of the present invention is described below with reference to the accompanying drawings.

[0020] This invention provides a method for testing transmission performance. This method can be applied to testing the transmission performance of transmission systems in machinery. It should be noted that the machinery can be a seeder, rotary tiller, or other machinery with a transmission system. This invention does not limit the type of machinery to which the transmission performance testing method is applied. This embodiment of the invention only illustrates the application of the transmission performance testing method to testing the transmission performance of a seeder.

[0021] Reference Figure 1 This is a flowchart illustrating the first embodiment of the transmission performance testing method of the present invention. The transmission performance testing method includes: Step S10: Obtain the first rotational speed of the first rotating component 21, the second rotational speed of the second rotating component 22, and the number of samplings within a preset detection time, wherein the first rotating component 21 and the second rotating component 22 are drivenly connected. Specifically, the transmission system includes a first rotating component 21 and a second rotating component 22. The first rotating component 21 and the second rotating component 22 are drivenly connected, so that the first rotating component 21 can drive the second rotating component 22 to rotate during the rotation process. The actual rotation speeds of the first rotating component 21 and the second rotating component 22 are obtained respectively. The actual rotation speed of the first rotating component 21 is the first rotation speed, and the actual rotation speed of the second rotating component 22 is the second rotation speed. The number of samplings of the first rotation speed and the second rotation speed is obtained within a preset detection time.

[0022] Step S20: Determine the rotational speed fluctuation index of the second rotating component 22 based on the first rotational speed, the second rotational speed, and the number of samplings; Step S30: Determine the transmission performance level of the transmission system based on the speed fluctuation index; Specifically, a speed fluctuation index is determined based on a first speed, a second speed, and the number of samplings. This index characterizes the periodic fluctuation of the actual speed of the second rotating component 22. Furthermore, the transmission performance level can be determined based on this index. The transmission performance level characterizes the impact of transmission errors on the actual speed of the second rotating component 22, thus facilitating an accurate assessment of whether the transmission system meets actual operational requirements. This method enables the detection of whether the structural design and assembly precision of the transmission system meet the required transmission performance by acquiring the first speed, the second speed, and the number of samplings, significantly improving the accuracy of transmission performance testing and evaluation. Moreover, in a seeder, the assembly error of the transmission system has a significant impact on the coefficient of variation of the qualified plant spacing. By using a transmission performance testing method to detect the transmission performance level of the seeder's transmission system, the periodic impact of the transmission system on sowing performance can be accurately assessed, thereby improving the seeder's production qualification rate.

[0023] Reference Figure 2 Based on the first embodiment described above, step S20, determining the rotational speed fluctuation index of the second rotating component 22 according to the first rotational speed, the second rotational speed, and the number of samplings, includes: Step S21: Determine the root mean square error between the second rotational speed and the preset rotational speed reference value based on the first rotational speed, the second rotational speed, and the number of samplings. Specifically, the root mean square error is determined based on the first rotational speed, the second rotational speed, and the number of samplings. The root mean square error is used to measure the average deviation between the second rotational speed and the preset rotational speed reference value. This allows the influence of transmission performance on the actual rotational speed of the second rotating component 22 to be intuitively reflected through the root mean square error. The preset rotational speed reference value can be the theoretical rotational speed of the second rotating component 22, that is, the theoretical rotational speed that is proportional to the first rotational speed and is determined based on the first rotational speed and the design transmission ratio of the transmission system. Alternatively, it can be a preset value determined based on the operational application requirements.

[0024] Step S22: Determine the root mean square error variation coefficient based on the root mean square error; Step S23: Determine the transmission performance level based on the root mean square error coefficient of variation; Specifically, the root mean square error (RMSE) variation coefficient is determined based on the RMSE. The smaller the RMSE variation coefficient, the smaller the transmission error of the transmission system and the better the transmission performance of the transmission system. Conversely, the larger the RMSE variation coefficient, the larger the transmission error of the transmission system and the worse the transmission performance of the transmission system. This enables the quantitative evaluation of the transmission performance level through the RMSE variation coefficient. The evaluation results are highly accurate and facilitate the judgment of whether the transmission system can meet the actual operation requirements.

[0025] Further, step S21, based on the first rotational speed, the second rotational speed, and the number of samplings, determines the root mean square error between the second rotational speed and the preset rotational speed reference value, including: Substituting the first rotational speed, the second rotational speed, the number of samplings, and the transmission ratio between the first rotating component 21 and the second rotating component 22 into the root mean square error calculation formula, the root mean square error is obtained. The root mean square error calculation formula is as follows: , In the formula, The root mean square error, For the number of samples, The first rotational speed, For the second degree of rotation, The transmission ratio; Specifically, the first rotational speed of the first rotating component 21, the second rotational speed of the second rotating component 22, the number of samplings within a preset detection time, and the transmission ratio between the first rotating component 21 and the second rotating component 22 are obtained. The first rotational speed, the second rotational speed, the number of samplings, and the transmission ratio are then substituted into the root mean square error calculation formula to obtain the root mean square error. This allows for accurate measurement of the average deviation between the second rotational speed and the preset rotational speed reference value, thereby improving the accuracy of transmission performance testing.

[0026] Further, step S22, determining the root mean square error variation coefficient based on the root mean square error, includes: Substituting the root mean square error, the first rotational speed, and the transmission ratio into the formula for calculating the coefficient of variation, we obtain the root mean square error coefficient of variation. The formula for calculating the coefficient of variation is as follows: , In the formula, The root mean square error coefficient of variation; Specifically, the obtained first rotational speed and transmission ratio, along with the calculated root mean square error, are substituted into the formula for calculating the coefficient of variation to obtain the root mean square error coefficient of variation. , the coefficient of variation of root mean square error eliminates the influence of dimension, converts the root mean square error into a relative percentage with respect to the average level of data, realizes the quantitative evaluation of the transmission performance level, has high accuracy in evaluation results, and is conducive to accurately detecting the influence of transmission error on the actual rotational speed of the second rotating member 22.

[0027] In an embodiment of the present invention, based on the above first embodiment, step S30 of determining the transmission performance level of the transmission system according to the rotational speed fluctuation index includes: When the coefficient of variation of root mean square error is less than the preset deviation value, determine that the transmission performance level is a qualified level; When the coefficient of variation of root mean square error is greater than or equal to the preset deviation value, determine that the transmission performance level is an unqualified level.

[0028] Specifically, compare the coefficient of variation of root mean square error with the preset deviation value. When the coefficient of variation of root mean square error is less than the preset deviation value, the transmission performance is at a qualified level, the influence of transmission error on the actual rotational speed of the second rotating member 22 is small, and the transmission performance of the transmission system meets the actual operation requirements. And when the coefficient of variation of root mean square error is equal to or greater than the preset deviation value, the transmission performance is at an unqualified level, the influence of transmission error on the actual rotational speed of the second rotating member 22 is large, and the transmission performance level of the transmission system cannot meet the actual operation requirements, and it is necessary to recalibrate the installation accuracy of the transmission system to avoid affecting the seeding quality of the seeder, realizing the intuitive embodiment of the transmission performance level of the transmission system, improving the production qualification rate and production quality of the seeder; moreover, the preset deviation value can be set to any value in the range of 1% to 5%, and the preset deviation value can be preset based on the operation application requirements. When the requirement for the qualified seeding spacing is high, the preset deviation value is small, and when the requirement for the qualified seeding spacing is low, the preset deviation value is large, so as to flexibly set the preset deviation value according to the actual seeding requirements, and further accurately judge whether the transmission system can meet the seeding spacing requirements, further ensuring the seeding quality.

[0029] In the second embodiment of the transmission performance detection method of the present invention, the transmission performance level of the transmission system can be set as excellent / good / medium / poor. Compare the coefficient of variation of root mean square error with the preset deviation value, and determine the transmission performance level as excellent, good, medium or poor according to the comparison result, so as to facilitate the intuitive embodiment of whether the transmission performance of the transmission system can meet the operation requirements. It can be understood that in the transmission performance detection method of the present invention, the transmission performance level can be flexibly set according to the actual detection requirements to improve the accuracy of the detection result and the reliability of the evaluation.

[0030] Refer to Figure 3 , based on the above first embodiment, step S10 of obtaining the first rotational speed of the first rotating member 21, the second rotational speed of the second rotating member 22, and the number of sampling times within the preset detection duration includes: Step S11: Obtain the first rotational speed and the second rotational speed; Specifically, the first rotating member 21 is provided with a first speed sensor 30 for detecting the actual speed of the first rotating member 21, and the second rotating member 22 is provided with a second speed sensor 40 for detecting the actual speed of the second rotating member 22. The speed value detected by the first speed sensor 30 is the first speed, and the speed value detected by the second speed sensor 40 is the second speed.

[0031] Step S12: Determine the number of sampling times based on the preset sampling period and the rotation period of the second rotating component 22; Specifically, the preset detection time is determined based on the rotation period of the second rotating component 22, and then the number of samplings can be determined based on the preset sampling period and the preset detection time. The number of samplings affects the accuracy of the root mean square error coefficient of variation. The number of samplings can be flexibly set based on the operational application requirements to ensure the accuracy of the detection results.

[0032] Further, step S12, determining the number of sampling times based on the preset sampling period and the rotation period of the second rotating member 22, includes: Substituting the preset sampling weight, preset sampling period, and rotation period into the sampling count calculation formula yields the sampling count. The sampling count calculation formula is as follows: , In the formula, For the number of samples, For the preset sampling period, For the rotation period, The preset number of times is weighted, and ; Specifically, the product of the rotation period of the second rotating component 22 and the preset number weight is the preset detection time. The preset number weight eliminates random errors and improves the accuracy of the detection results. The preset number weight, preset sampling period, and rotation period are substituted into the sampling number calculation formula to obtain the sampling number, so as to determine the root mean square error variation coefficient based on the sampling number, the first speed, and the second speed, thereby accurately evaluating the transmission performance level of the transmission system. Furthermore, it can be understood that by flexibly controlling the first speed of the first rotating component 21, the transmission performance under various speed conditions can be detected, further improving the comprehensiveness and accuracy of the detection results.

[0033] In this embodiment of the invention, the transmission performance testing method is applied to the transmission system of a working machine, wherein the working machine is a seeder, and the transmission performance testing method further includes: The preset sampling period is determined based on the seeding interval of the seeder; Specifically, the seed placement time interval t of the seeder is set to 50ms~1000ms, and the sampling period is preset. This increases the number of samples, ensuring that the number of samples meets the testing requirements and further improves the accuracy of the test results.

[0034] Furthermore, the present invention also provides a transmission system, which includes a controller 10, a transmission assembly 20, and a detection assembly. The controller 10 is configured to execute the transmission performance detection method described above. The transmission assembly 20 includes a rotation drive, a first rotating member 21, and a second rotating member 22, which are sequentially driven and connected. The rotation drive is used to drive the first rotating member 21 to rotate, so that the first rotating member 21 drives the second rotating member 22 to rotate. The detection assembly includes a first speed sensor 30 and a second speed sensor 40. The first speed sensor 30 is disposed on the first rotating member 21 and is used to detect a first speed, and the second speed sensor 40 is disposed on the second rotating member 22 and is used to detect a second speed. The first speed sensor 30 and the second speed sensor 40 are respectively communicatively connected to the controller 10.

[0035] like Figure 4 and Figure 5 As shown, the rotation drive component is driven to connect with the first rotating component 21, and the first rotating component 21 is driven to connect with the second rotating component 22. Due to structural design and assembly precision, there is a transmission error between the first rotating component 21 and the second rotating component 22, causing a transmission deviation between the second rotational speed of the second rotating component 22 and the theoretical rotational speed (the product of the first rotational speed and the transmission ratio). The first rotational speed sensor 30 sends the detected first rotational speed to the controller 10, and the second rotational speed sensor 40 sends the detected second rotational speed to the controller 10. The controller 10 acquires the first rotational speed, the second rotational speed, and the number of samplings, and determines a rotational speed fluctuation index based on the first rotational speed, the second rotational speed, and the number of samplings. The rotational speed fluctuation index is used to characterize the periodic fluctuation of the actual rotational speed of the second rotating component 22. The transmission performance level can be determined based on the rotational speed fluctuation index of the second rotating component 22. The transmission performance level is used to characterize the influence of the transmission error of the transmission system on the actual rotational speed of the second rotating component 22, thereby facilitating an accurate assessment of whether the transmission system can meet the actual operation requirements. By acquiring the first rotational speed, the second rotational speed, and the number of samplings, it is possible to detect whether the structural design and assembly precision of the transmission system can meet the transmission performance required for operation, which greatly improves the accuracy of transmission performance testing and evaluation. Furthermore, in a seeder, the assembly error of the transmission system has a significant impact on the coefficient of variation of the qualified plant spacing. By testing the transmission performance level of the seeder's transmission system through the transmission performance testing method, the periodic impact of the transmission system on the sowing performance can be accurately assessed, thereby improving the production qualification rate of the seeder.

[0036] In addition, the present invention also provides a working machine, which includes the transmission system according to the above description. The specific structure of the transmission system is as described in the above embodiments. Since the working machine adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0037] In embodiments of the present invention, such as Figure 4 and Figure 5 As shown, the operating machinery is a seeder. The first rotating component 21 is the ground wheel 21a of the seeder, and the second rotating component 22 is the seed metering device 22a of the seeder. The rotating drive component is driven to connect with the ground wheel 21a and is used to drive the ground wheel 21a to rotate, so that the ground wheel 21a can drive the seed metering device 22a to rotate. However, due to transmission error, there is a deviation between the actual speed and the theoretical speed of the seed metering device 22a. The first speed sensor 30 is set on the ground wheel 21a and can detect the actual speed of the ground wheel 21a, that is, detect the first speed. The second speed sensor 40 is set on the seed metering device 22a and can detect the actual speed of the seed metering device 22a, that is, detect the second speed. The first speed sensor 30 and the second speed sensor 40 send the detection results to the controller 10, so that the controller 10 can determine the root mean square error variation coefficient based on the first speed, the second speed and the number of samplings. The root mean square error variation coefficient directly reflects the transmission performance level, which makes it easier to judge whether the qualified plant spacing variation coefficient of the seeder can meet the operation requirements, ensuring the sowing quality and improving the production qualification rate.

[0038] Furthermore, such as Figure 4As shown, the transmission assembly 20 also includes a drive wheel 23, a main drive shaft 24, and a seed metering drive shaft 25. The rotation drive is a motor. The drive wheel 23 is sleeved on the output shaft of the rotation drive and is driven to the ground wheel 21a, so that the rotation drive can drive the ground wheel 21a to rotate through the drive wheel 23. The ground wheel 21a is driven to the main drive shaft 24 through a first synchronous chain 26. The seed meterer 22a is driven to the seed metering drive shaft 25 through a second synchronous chain 27. The main drive shaft 24 and the seed metering drive shaft 25 are both located in a gearbox and driven to each other, so that the ground wheel 21a can be driven to rotate sequentially through the first synchronous chain 26, the main drive shaft 24, the seed metering drive shaft 25, and the second synchronous chain 27. Synchronous chain 27 drives seed metering device 22a to rotate. Controller 10 acquires the first rotational speed of ground wheel 21a, the second rotational speed of seed metering device 22a, and the number of samplings to determine the root mean square error variation coefficient between the second rotational speed and the preset rotational speed reference value. Based on the root mean square error variation coefficient, it can accurately determine whether the transmission performance level of the transmission system meets the requirements of the seeder operation. It can effectively detect the influence of transmission error on the periodic fluctuation of the actual rotational speed of seed metering device 22a. Furthermore, the rotational speed of the rotating drive component is adjustable, thereby controlling the rotational speed of ground wheel 21a by adjusting the rotational speed of the rotating drive component, realizing a realistic simulation of the seeder's travel speed in the field, further improving the accuracy of the detection results.

[0039] In embodiments of the present invention, such as Figure 4 As shown, the transmission assembly 20 also includes a support wheel 28, which is spaced apart from the drive wheel 23. The ground wheel 21a is rotatably disposed between the support wheel 28 and the drive wheel 23, so that the support wheel 28 and the drive wheel 23 can support the ground wheel 21a. Rotating the drive component can drive the drive wheel 23 to rotate, so that the drive wheel 23 drives the ground wheel 21a to rotate. The support is stable and reliable, and the transmission performance can be tested without disassembling the seeder. The test is convenient and quick, and the test efficiency is improved.

[0040] In embodiments of the present invention, such as Figure 5 As shown, the detection component also includes a signal processor 50, which is communicatively connected to the first speed sensor 30, the second speed sensor 40, and the controller 10. The first speed sensor 30 and the second speed sensor 40 send the detected first speed and second speed to the signal processor 50, respectively. The signal processor 50 converts the speed signal into a PWM (Pulse Width Modulation) signal and transmits it to the controller 10, which improves the real-time performance and anti-interference capability of the signal transmission. The transmission system of the operating machinery is sampled at high frequency by the controller 10, which realizes the periodic influence of the assembly error of the transmission system on the sowing spacing. There is no need for manual statistics of the sowing spacing, and the detection results of the transmission performance can be output quickly, which effectively improves the detection efficiency of the seeder transmission system.

[0041] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for testing transmission performance, characterized in that, The transmission performance testing method includes: The first rotational speed of the first rotating component (21), the second rotational speed of the second rotating component (22), and the number of samplings within a preset detection time are obtained, wherein the first rotating component (21) and the second rotating component (22) are drivenly connected; Based on the first rotational speed, the second rotational speed, and the number of samplings, the rotational speed fluctuation index of the second rotating component (22) is determined; The transmission performance level of the transmission system is determined based on the speed fluctuation index.

2. The transmission performance testing method according to claim 1, characterized in that, The step of determining the rotational speed fluctuation index of the second rotating component (22) based on the first rotational speed, the second rotational speed, and the number of samplings includes: Based on the first rotational speed, the second rotational speed, and the number of samplings, the root mean square error between the second rotational speed and the preset rotational speed reference value is determined; The root mean square error variation coefficient is determined based on the root mean square error. The transmission performance level is determined based on the root mean square error variation coefficient.

3. The transmission performance testing method according to claim 2, characterized in that, The step of determining the root mean square error between the second rotational speed and the preset rotational speed reference value based on the first rotational speed, the second rotational speed, and the number of samplings includes: The root mean square error (RMSE) is obtained by substituting the first rotational speed, the second rotational speed, the number of samplings, and the transmission ratio between the first rotating component (21) and the second rotating component (22) into the root mean square error calculation formula. The root mean square error calculation formula is as follows: ， In the formula, The root mean square error, For the number of samples, The first rotational speed, For the second degree of rotation, This is the transmission ratio.

4. The transmission performance testing method according to claim 3, characterized in that, The step of determining the root mean square error variation coefficient based on the root mean square error includes: Substituting the root mean square error, the first rotational speed, and the transmission ratio into the coefficient of variation calculation formula, we obtain the root mean square error coefficient of variation, wherein the coefficient of variation calculation formula is: ， In the formula, is the root mean square error coefficient of variation.

5. The transmission performance testing method according to claim 2, characterized in that, The step of determining the transmission performance level of the transmission system based on the speed fluctuation index includes: If the root mean square error coefficient of variation is less than a preset deviation value, the transmission performance level is determined to be a qualified level. If the root mean square error coefficient of variation is greater than or equal to a preset deviation value, the transmission performance level is determined to be unqualified.

6. The transmission performance testing method according to any one of claims 1 to 5, characterized in that, The acquisition of the first rotational speed of the first rotating component (21), the second rotational speed of the second rotating component (22), and the number of samplings within a preset detection time includes: Obtain the first rotational speed and the second rotational speed; The number of samplings is determined based on the preset sampling period and the rotation period of the second rotating component (22).

7. The transmission performance testing method according to claim 6, characterized in that, The step of determining the number of samplings based on the preset sampling period and the rotation period of the second rotating component (22) includes: The sampling count is obtained by substituting the preset number of times weight, the preset sampling period, and the rotation period into the sampling count calculation formula, wherein the sampling count calculation formula is: ， In the formula, For the number of samples, For the preset sampling period, For the rotation period, The preset number of times is weighted, and .

8. The transmission performance testing method according to claim 6, characterized in that, The transmission performance testing method is applied to the transmission system of a working machine, wherein the working machine is a seeder, and the transmission performance testing method further includes: The preset sampling period is determined based on the seeding interval of the seeder.

9. A transmission system, characterized in that, The transmission system includes: The controller (10) is configured to perform the transmission performance detection method according to any one of claims 1 to 8; The transmission assembly (20) includes a rotation drive, a first rotation component (21) and a second rotation component (22). The rotation drive, the first rotation component (21) and the second rotation component (22) are sequentially driven and connected. The rotation drive is used to drive the first rotation component (21) to rotate so that the first rotation component (21) drives the second rotation component (22) to rotate. The detection component includes a first speed sensor (30) and a second speed sensor (40). The first speed sensor (30) is disposed on the first rotating member (21) and is used to detect a first speed. The second speed sensor (40) is disposed on the second rotating member (22) and is used to detect a second speed. The first speed sensor (30) and the second speed sensor (40) are respectively connected to the controller (10) for communication.

10. A type of operating machinery, characterized in that, The operating machinery includes the transmission system according to claim 9.

Images