A combine harvester state parameter detection test bench and method

Abstract

The application aims to provide a combine harvester state parameter detection test bench and method, which comprises a conveying belt, a control device and a combine harvester rack for placing a combine harvester; the combine harvester rack is internally provided with a power source of a threshing cylinder and a grain conveying auger, a power source of a fan and a power source of a cleaning sieve, which respectively drive corresponding parts in the combine harvester to conduct experiments; the combine harvester rack is further provided with a power source of an inclined conveyor, a power source of a wind deflector and a power source of a cleaning sieve opening, which respectively drive corresponding parts in the combine harvester to conduct experiments; the conveying belt is horizontally arranged, and a discharge end of the conveying belt is arranged in cooperation with a feeding end of the inclined conveyor of the combine harvester; and the application further comprises a detection system installed on the combine harvester rack and used for detecting state parameters of each part of the combine harvester in the experiment. The application can monitor state parameters of the combine harvester in real time and find optimal system parameters.

Description

Technical Field

[0001] This invention relates to the field of combine harvester condition monitoring technology, and in particular to a test bench and method for detecting combine harvester condition parameters. Background Technology

[0002] Feed rate, loss rate, and impurity content have always been important performance indicators for combine harvesters. When harvesting the same crop, achieving lower loss and impurity rates at different feed rates currently requires manual adjustments based on experience and multiple machine stops for most domestic models. Furthermore, adjusting the operating parameters of the same harvester for harvesting different crops also relies on experienced operators conducting numerous experiments.

[0003] Therefore, there is an urgent need for a combine harvester status monitoring system. This system can find the optimal combination of feed rate, threshing drum speed, blower speed, air distribution plate angle, cleaning screen opening, and cleaning screen frequency for various types of combine harvesters. Summary of the Invention

[0004] The purpose of this invention is to provide a test bench and method for detecting the status parameters of a combine harvester, which can monitor the status parameters of the combine harvester in real time and find the optimal system parameters.

[0005] To achieve the above objectives, the technical solution adopted by this invention is as follows: a test bench for detecting the state parameters of a combine harvester, comprising a conveyor belt, a control device, and a combine harvester frame for placing the combine harvester; the combine harvester frame is equipped with a threshing drum and grain conveying auger power source, a blower power source, and a cleaning screen power source, which respectively drive the corresponding components inside the combine harvester to conduct experiments; the combine harvester frame is also equipped with an inclined conveyor power source, a baffle drive power source, and a cleaning screen opening drive power source, which respectively drive the corresponding components inside the combine harvester to conduct experiments; the conveyor belt is horizontally arranged, and the discharge end of the conveyor belt is configured to cooperate with the inlet end of the inclined conveyor of the combine harvester; it also includes a detection system installed on the combine harvester frame for detecting the experimental state parameters of each component of the combine harvester; the control device is electrically connected to the electrical components on the test bench to control their operation.

[0006] Preferably, the detection system includes a torque sensor and a speed sensor for detecting the inclined conveyor, a speed sensor for detecting the threshing drum, an encoder for detecting the fan speed, a single-turn absolute encoder for detecting the angle of the air distribution plate, a multi-turn absolute encoder for detecting the opening of the cleaning screen, and an encoder for detecting the vibration frequency of the cleaning screen.

[0007] A method for testing and analyzing the condition parameters of a combine harvester includes the following steps:

[0008] S1. Without disconnecting the original transmission system of the combine harvester, set the rated feed rate In0 of the combine harvester, and detect the threshing drum speed Vt0, the blower speed Vf0, the vibration frequency of the cleaning screen f0, the baffle angle θ, and the opening degree of the cleaning screen L.

[0009] S2. Disconnect the original transmission system of the combine harvester, load the transmission system of the test bench, and conduct the steepest climbing test. Set the rated feed rate of the combine harvester Inmin = 0.3In0, Inmax = 1.5In0, the threshing drum speed Vtmin = 0.3Vt0, Vtmax = 1.5Vt0, the blower speed Vfmin = 0.3Vf0, Vfmax = 1.5Vf0, the cleaning screen vibration frequency fmin = 0.3f0, fmax = 1.5f0, the minimum value of the baffle angle is θmin, the maximum value is θmax, and the minimum value of the cleaning screen opening is Lmin, the maximum value is Lmax. Obtain the loss rate and impurity content under each condition.

[0010] S3. Set the weighting value of the impurity rate to 0.4 and the weighting value of the loss rate to 0.6. Calculate the weighted composite value of each experimental result. The minimum value of each experimental result is the center point of the response surface.

[0011] S4. Design a CCD experiment using Design-Expert;

[0012] S5. Use Design-Expert to perform polynomial fitting. When the loss rate and impurity rate are set to the minimum, Design-Expert can be used to obtain the optimal combination of other parameters.

[0013] Preferably, the loading test bench transmission system in step S2 includes the power source for starting the threshing drum and grain conveying auger on the combine harvester frame, the power source for the blower, the power source for the cleaning screen, the power source for the inclined conveyor, the power source for the wind deflector drive, and the power source for the cleaning screen opening, which respectively drive the corresponding components inside the combine harvester to carry out the experiment.

[0014] Preferably, in step S4, in the CCD experiment, normalization "-1" represents 0.8 times each data parameter, normalization "1" represents 1.2 times each data parameter, and alpha is 1.49535.

[0015] The beneficial effects of this invention are:

[0016] This design proposes a test bench and method for detecting the state parameters of a combine harvester. It can monitor the feed rate, threshing drum speed, fan speed, air distribution plate angle, cleaning screen vibration frequency, and cleaning screen opening in real time. Response surface analysis is performed based on the experimental results of the steepest incline test and CCD test to find the optimal system parameters. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] In the diagram, 1 is the conveyor belt, 2 is the inclined conveyor, 3 is the combine harvester, 4 is the combine harvester platform, and 5 is the control device. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0022] It should also be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The term "plural" as used in the patent application specification and claims means two or more; the terms "upper," "lower," "left," "right," "front end," "rear end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Changes or adjustments to these relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0023] The present invention will now be described in further detail with reference to the embodiments and the accompanying drawings.

[0024] Example 1:

[0025] This invention discloses a test bench for detecting the condition parameters of a combine harvester. For example... Figure 1As shown, Embodiment 1 mainly includes a conveyor belt 1, a control device 5, and a combine harvester frame 4 for placing the combine harvester 3. The combine harvester frame 4 is equipped with a threshing drum and grain conveying auger power source, a blower power source, and a cleaning screen power source, which respectively drive the corresponding components within the combine harvester 3 to conduct experiments. The combine harvester frame 4 is also equipped with an inclined conveyor power source, a baffle drive power source, and a cleaning screen opening drive power source, which respectively drive the corresponding components within the combine harvester 3 to conduct experiments.

[0026] The conveyor belt 1 is horizontally arranged, and the discharge end of the conveyor belt 1 is configured to cooperate with the inlet end of the inclined conveyor 2 of the combine harvester 3; it also includes a detection system installed on the combine harvester frame 4 for detecting the experimental status parameters of each component of the combine harvester 3; the control device 5 is electrically connected to the electrical components on the test bench to control their operation.

[0027] The detection system includes a torque sensor and a speed sensor for detecting the inclined conveyor 2, a speed sensor for detecting the threshing drum, an encoder for detecting the fan speed, a single-turn absolute encoder for detecting the angle of the air distribution plate, a multi-turn absolute encoder for detecting the opening of the cleaning screen, and an encoder for detecting the vibration frequency of the cleaning screen.

[0028] This invention discloses a method for testing and analyzing the status parameters of a combine harvester, comprising the following steps: S1, without disconnecting the original transmission system of the combine harvester 3, setting the rated feed rate In0 of the combine harvester 3, and detecting the threshing drum speed Vt0, the blower speed Vf0, the vibration frequency f0 of the cleaning screen, the angle of the baffle plate θ, and the opening degree L of the cleaning screen;

[0029] S2. Disconnect the original transmission system of combine harvester 3, load the transmission system of the test bench, and conduct the steepest climbing test. Set the rated feed rate of combine harvester 3 as Inmin = 0.3In0, Inmax = 1.5In0, the threshing drum speed as Vtmin = 0.3Vt0, Vtmax = 1.5Vt0, the blower speed as Vfmin = 0.3Vf0, Vfmax = 1.5Vf0, the cleaning screen vibration frequency as fmin = 0.3f0, fmax = 1.5f0, the minimum value of the baffle angle as θmin, the maximum value as θmax, and the minimum value of the cleaning screen opening as Lmin, the maximum value as Lmax. Obtain the loss rate and impurity rate under each condition. The results are shown in the table below.

[0030]

[0031]

[0032] S3. Set the weighting value of impurity rate to 0.4 and the weighting value of loss rate to 0.6. Calculate the weighted comprehensive value of each experimental result: 0.4*si+0.6*Zi. The minimum value of each experimental result is the center point Inm, Vtm, Vfm, fm, θm, Lm of the response surface.

[0033] S4. Design a CCD experiment using Design-Expert, where the normalization "-1" represents 0.8*Inm, 0.8*Vtm, 0.8*Vfm, 0.8*fm, 0.8*θm, and 0.8*Lm respectively. The normalization "1" represents 1.2*Inm, 1.2*Vtm, 1.2*Vfm, 1.2*fm, 1.2*θm, and 1.2*Lm respectively. alpha is set to 1.49535.

[0034] S5. Use Design-Expert for polynomial fitting. When the loss rate S is set to the minimum and the impurity rate Z is set to the minimum, Design-Expert can be used to obtain the optimal combination of other parameters.

[0035] In step S2, the loading of the test bench transmission system includes starting the power sources for the threshing drum and grain conveying auger, the blower, the cleaning screen, the inclined conveyor, the baffle drive, and the cleaning screen opening, all located on the combine harvester frame 4. These power sources drive the corresponding components within the combine harvester 3 to conduct the experiment. In step S4, in the CCD experiment, normalization "-1" represents 0.8 times the normalization of each data parameter, and normalization "1" represents 1.2 times the normalization of each data parameter. Alpha is set to 1.49535.

[0036] It should be noted that the parts not described in detail in the above embodiments are all prior art.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method of analyzing a combine harvester status parameter test, characterized by: The analysis method uses a detection test bench, which comprises a conveying belt (1), a control device (5), and a combine harvester rack (4) for placing a combine harvester (3); the combine harvester rack (4) is internally provided with power sources of a threshing cylinder, a grain conveying auger, a fan, and a cleaning screen, which respectively drive corresponding parts in the combine harvester (3) to conduct experiments; the combine harvester rack (4) is further provided with power sources of an inclined conveyor, a wind deflector, and a cleaning screen opening, which respectively drive corresponding parts in the combine harvester (3) to conduct experiments; the conveying belt (1) is horizontally arranged, and a discharge end of the conveying belt (1) is arranged in cooperation with a feeding end of the inclined conveyor (2) of the combine harvester (3); the detection test bench further comprises a detection system installed on the combine harvester rack (4) and used for detecting state parameter experimental values of each part of the combine harvester (3); and the control device (5) is electrically connected with electrical components on the test bench to control the working states of the electrical components. The combine harvester state parameter detection test analysis method comprises the following steps: S1, continuously opening the original transmission system of the combine harvester (3), setting a rated feeding amount In0 of the combine harvester (3), and detecting a threshing cylinder rotating speed Vt0, a fan rotating speed Vf0, a cleaning screen vibration frequency f0, a wind deflector angle θ, and a cleaning screen opening L; S2, disconnecting the original transmission system of the combine harvester (3), loading a transmission system of the test bench, conducting a most steep climbing experiment, setting a rated feeding amount Inmin=0.3In0 and Inmax=1.5In0 of the combine harvester (3), a threshing cylinder rotating speed Vtmin=0.3Vt0 and Vtmax=1.5Vt0, a fan rotating speed Vfmin=0.3Vf0 and Vfmax=1.5Vf0, a cleaning screen vibration frequency fmin=0.3f0 and fmax=1.5f0, a minimum value θmin and a maximum value θmax of the wind deflector angle, and a minimum value Lmin and a maximum value Lmax of the cleaning screen opening, and obtaining loss rates and impurity content rates under various states; S3, setting a weighted value of the impurity content rate as 0.4 and a weighted value of the loss rate as 0.6, calculating weighted comprehensive values of experimental results, and taking a minimum value of each experimental result as a center point of a response surface; S4, designing a CCD experiment by using Design-Expert; S5, performing polynomial fitting by using Design-Expert, setting a minimum value of the loss rate, a minimum value of the impurity content rate, and obtaining an optimal combination of other parameters by using Design-Expert.

2. The combine harvester state parameter test analysis method according to claim 1, characterized in that: The detection system comprises a torque sensor and a rotating speed sensor for detecting the inclined conveyor (2), a rotating speed sensor for detecting the threshing cylinder, an encoder for detecting the fan rotating speed, a single-turn absolute value encoder for detecting the wind deflector angle, a multi-turn absolute value encoder for detecting the cleaning screen opening, and an encoder for detecting the cleaning screen vibration frequency.

3. The combine harvester state parameter detection test analysis method according to claim 1, characterized in that: The loading of the test bench transmission system in step S2 includes starting the power sources of the threshing cylinder, the grain conveying auger, the fan, the cleaning screen, the inclined conveyor, the wind baffle and the cleaning screen opening on the combine harvester bench (4), which respectively drive the corresponding parts in the combine harvester (3) to conduct experiments.

4. The combine harvester state parameter test analysis method according to claim 1, characterized in that: In step S4, the normalization "-1" in the CCD experiment respectively represents 0.8 times of each data parameter, the normalization "1" respectively represents 1.2 times of each data parameter, and alpha is 1.49535.

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