Pneumatic seed metering device multi-channel dynamic negative pressure monitoring system and method

The technology of a seed metering device and monitoring system is applied in the field of multi-channel dynamic negative pressure monitoring system of pneumatic seed metering device, which can solve the problems of large dynamic negative pressure fluctuations and difficulty in accurate reading, and achieve stable operation, high practicability, The effect of reducing manufacturing costs

Active Publication Date: 2022-04-26
ANHUI AGRICULTURAL UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the existing multi-row parallel pneumatic seeding device has large dynamic negative pressure fluctuations and is difficult to accurately read and monitor in real time, the present invention uses LabVIEW virtual instrument technology to design a multi-channel dynamic seeding device based on LabVIEW. The negative pressure monitoring system realizes the real-time monitoring of the dynamic negative pressure of the main and branch roads

Method used

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  • Pneumatic seed metering device multi-channel dynamic negative pressure monitoring system and method
  • Pneumatic seed metering device multi-channel dynamic negative pressure monitoring system and method
  • Pneumatic seed metering device multi-channel dynamic negative pressure monitoring system and method

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Experimental program
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Effect test

Embodiment 1

[0066] In order to determine the distribution uniformity and fluctuation stability of the dynamic negative pressure among the branches, the dynamic negative pressure levels of the branches are selected as -1.0, -2.0, -3.0, -4.0, -5.0kPa, a total of 5 gradients, and the seeding The shaft speed is 30r / min, and the dynamic negative pressure value of each branch is collected within 3 minutes, and the mean value, standard deviation and dynamic negative pressure consistency coefficient of variation are calculated, and the results shown in Table 2 are obtained.

[0067] Table 2

[0068]

[0069] Among them, the formula for calculating the variation coefficient of negative pressure uniformity is as follows:

[0070]

[0071] In the formula is the standard deviation of the dynamic negative pressure fluctuation of each branch; S is the coefficient of variation of the negative pressure uniformity of the branch; t is the time (t=180); is the dynamic negative pressure value of a ...

Embodiment 2

[0074] In order to explore the influence of the dynamic negative pressure of the dry road and the speed of the seeding shaft on the seeding performance of the seed metering device, determine the minimum dynamic negative pressure of the dry road required for the seeding performance of the seeding device to be stable at different speeds of the seeding shaft , to carry out the experiment of the influence of dynamic negative pressure and rotational speed on the seeding performance of dry road. The dynamic negative pressure of the dry road is controlled by the opening of the electric valve, which is controlled by the voltage, and the voltage of 0~10V is linearly corresponding to the opening of the valve at 0~100%.

[0075]In this test, the rotational speed and voltage (valve opening) of the seeding shaft were used as the test factors, and the variation coefficient of the consistency of each row’s displacement and the total seeding volume were used as the evaluation indicators. 5 gr...

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Abstract

The invention relates to the technical field of pneumatic seeders, and specifically discloses a multi-channel dynamic negative pressure monitoring system and method for a pneumatic seed metering device; Negative pressure air pipes, negative pressure fans, branch negative pressure air pipes and main road negative pressure air pipes are equipped with pressure sensors, main road negative pressure air pipes are equipped with electric valves, and pressure sensors are connected to data acquisition cards. Connected to the host computer; the present invention realizes the monitoring of the dynamic negative pressure value of the whole main road and each branch of the pneumatic seed metering device, including real-time collection, reading, separation, display and storage of dynamic negative pressure data, and is a seed metering device The experimental research on the seeding performance, the intelligent detection and reliability analysis of the seeding device provide the basis, make up for the existing deficiency of the multi-channel dynamic negative pressure monitoring of the pneumatic system in the seeding device, and provide the basis for realizing the precise discharge of the seeder , Stable operation has laid the foundation.

Description

technical field [0001] The invention relates to the technical field of pneumatic seeding, and specifically discloses a multi-channel dynamic negative pressure monitoring system and method for a pneumatic seed metering device. Background technique [0002] Pneumatic seed metering device is a kind of seeder that relies on negative pressure to suck seeds to achieve precise seeding. There are mainly air suction type, air blowing type, air pressure type and positive and negative pressure combined type, etc., and its core key component is the pneumatic precision seed metering device. At present, researchers at home and abroad mostly focus on the structural design and optimization of the seed metering device, the mechanism research and improvement of the seed filling performance, and the simulation and bench test of the seed metering performance of the seed metering unit. In terms of research and other aspects, there are relatively few studies on the monitoring and control of air ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01C7/20G01L21/00G06F9/451
CPCA01C7/20G01L21/00G06F9/451
Inventor 陈永新谢瑞蒋乐张甜韩建锋钟继宇李兆东张顺
Owner ANHUI AGRICULTURAL UNIVERSITY
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