Multi-parameter adjustable precision pulse weeding system and method

Abstract

The invention discloses a multi-parameter adjustable precision pulse weeding system and method. The system comprises a control circuit and a microcontroller used for controlling the control circuit. The method comprises the steps that key parameters are set according to actual requirements, through the microcontroller and the control circuit, the frequency and the duty ratio are adjusted through a modulation strategy, the pulse number is adjusted through a pulse number control strategy, and adjustable precision pulse weeding is achieved. The strategy of controlling the pulse number, the frequency and the duty ratio is adopted, the method can more accurately adjust energy output to weeds, output of ineffective pulses can be effectively reduced, energy consumption is reduced, in addition, the control method is easy to operate, and as long as the speed of a microcontroller and the speed of a switch are enough, the energy consumption is reduced. The output pulse number can be controlled under high frequency, and the accurate and precise weeding effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of weeding, and particularly to a multi-parameter adjustable precise pulse weeding system and method. Background Art

[0002] In modern agricultural practices, weed management has always been a key link in improving crop yields and maintaining the ecological balance of farmland. Traditional weeding methods, such as chemical weeding and mechanical weeding, although effective to a certain extent, have problems such as environmental pollution, soil structure damage, and high energy consumption. With the development of agricultural technology, the electric shock weeding technology has gradually attracted attention due to its high efficiency and environmental protection characteristics.

[0003] The electric shock weeding technology realizes the precision and high efficiency of weed management through the innovative application of a pulse power supply. Compared with traditional chemical weeding or DC voltage methods, the pulse voltage technology shows significant superiority by virtue of its adjustable pulse number, energy output, and duty cycle. The pulse voltage can be customized for different types, densities, and growth stages of weeds. By flexibly controlling the pulse parameters, the system can dynamically allocate the energy intensity and action depth. This precise energy delivery can not only effectively break through the cell structure of weeds and inhibit root regeneration to ensure the weeding effect, but also avoid damage to the soil structure and adjacent crops, maintaining the ecological balance.

[0004] However, the existing electric shock weeding technology still has deficiencies in the control of pulse parameters. Most devices can only provide fixed pulse numbers, frequencies, and duty cycles, lacking flexibility and adaptability for different weeding scenarios. This results in it being often difficult to achieve the best weeding effect in practical applications, and may also cause unnecessary energy waste.

[0005] Therefore, it is particularly important to develop an electric shock weeding method that can precisely control the pulse number, frequency, and duty cycle. By intelligently regulating these parameters, not only can the energy delivery mode be optimized to improve the weeding efficiency, but also the energy consumption can be further reduced and the impact on the environment can be minimized. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a multi-parameter adjustable precise pulse weeding system, which can control the pulse number, frequency, and duty cycle, not only optimize the energy delivery mode, improve the weeding efficiency, but also further reduce the energy consumption and minimize the impact on the environment.

[0007] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0008] A multi-parameter adjustable precise pulse weeding system includes a control circuit and a microcontroller for controlling the control circuit;

[0009] Among them, the control circuit includes a battery-side voltage source V L , a leakage inductance L r , an exciting inductance L m , a winding L 1k , a first switching transistor S1, a second switching transistor S2, a third switching transistor S3, a fourth switching transistor S4, a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4;

[0010] The positive electrode of the battery-side voltage source V L is connected to the drain of the first switching transistor S1, and the negative electrode of the battery-side voltage source V L is connected to the source of the fourth switching transistor S4 to provide energy for the control circuit;

[0011] The same-named end of the primary side of the winding L 1k is connected to the positive electrode of the leakage inductance L r , the negative electrode of the leakage inductance L r is connected to the source of the first switching transistor S1, the drain of the fourth switching transistor S4 is connected to the source of the first switching transistor S1, the source of the fourth switching transistor S4 is connected to the source of the third switching transistor S3, and the drain of the third switching transistor S3 is connected to the different-named end of the primary side of the winding L 1k to form the main loop for energy transmission;

[0012] The positive electrode of the exciting inductance L m is connected to the different-named end of the primary side of the winding L 1k , and the negative electrode is connected to the same-named end of the primary side of the winding L 1k to play the role of energy storage and regulating energy transmission;

[0013] The same-named end of the secondary side of the winding L 1k is connected to the positive electrode of the first diode D1, the different-named end is connected to the negative electrode of the third diode D3, the positive electrode of the first diode D1 is connected to the negative electrode of the fourth diode D4, the negative electrode is connected to the negative electrode of the second diode D2, the positive electrode of the fourth diode D4 is connected to the positive electrode of the third diode D3, the positive electrode of the second diode D2 is connected to the negative electrode of the third diode D3, the positive electrode of the high-voltage side load V H is connected to the negative electrode of the second diode D2, and the negative electrode is connected to the positive electrode of the third diode D3 to form an energy output loop.

[0014] To achieve the above object, the present invention further provides a multi-parameter adjustable precise pulse weeding method, which is implemented by using the above multi-parameter adjustable precise pulse weeding system, including:

[0015] Setting key parameters according to actual requirements, and adjusting the input frequency f in and the input duty cycle D in through a microcontroller and a control circuit, using a modulation strategy, the pulse number control strategy is adopted to adjust the pulse number, realizing adjustable precise pulse weeding.

[0016] Furthermore, the set key parameters include:

[0017] Battery-side voltage source V L , high-voltage side load V H , leakage inductance L r , excitation inductance L m , power P, turns ratio N1:N2, output frequency f out , output duty cycle D out .

[0018] Furthermore, a modulation strategy is adopted to adjust the input frequency f in and the input duty cycle D in , including:

[0019] The control circuit is controlled by a microcontroller, and the control includes:

[0020] The first switch tube S1 and the fourth switch tube S4 are complementary modulated, the second switch tube S2 and the third switch tube S3 are complementary modulated, the drive signal of the second switch tube S2 lags the drive signal of the first switch tube S1 by 180°, the drive signal of the third switch tube S3 lags the drive signal of the fourth switch tube S4 by 180°, the input cycle time is 2T s , the output pulse voltage cycle is T s , the on-time of the first switch tube S1 is D out T s , D out is the output duty cycle; through the PWM mode of the advanced timer of the microcontroller, the input frequency f in is set to half of the output frequency f out , and the input duty cycle D in is set to half of the output duty cycle D out . By dynamically adjusting the pulse duty cycle and frequency, the best parameter combination can be matched for different soil characteristics (such as humidity, texture) and weed species (such as broad-leaved weeds, gramineous weeds), so as to adapt to diverse weeding scenarios, reducing environmental disturbance while ensuring efficient killing.

[0021] Furthermore, the pulse number control strategy is adopted to adjust the pulse number, including:

[0022] The half of the output pulse number is set by the counter of the microcontroller, the clock is configured and the automatic cumulative counting is triggered at the rising edge, and then the interrupt is configured and the drive is turned off. The pulse number corresponds to different energy levels, and by precisely applying pulse energy to weeds at different growth stages and species, energy conservation and effective inactivation of weeds are achieved.

[0023] Compared with the prior art, the principle and advantages of the present technical solution are as follows:

[0024] 1. Adjustable pulse number: During the electric shock weeding process, the pulse number can be accurately set according to the required energy, effectively reducing the output of invalid pulses, thereby reducing energy consumption.

[0025] 2. Adjustable frequency and duty cycle: Through the PWM mode of the advanced timer of the microcontroller, the input frequency and duty cycle are set to half of the output frequency and duty cycle, making the adjustment of the frequency and duty cycle convenient and capable of adapting to the requirements of various weeding scenarios, optimizing the pulse effect.

[0026] 3. Compared with the traditional pulse control method, the present technical solution adopts the strategy of controlling the pulse number, frequency, and duty cycle. This method can more accurately adjust the energy output to weeds, effectively reducing the output of invalid pulses and reducing energy consumption. In addition, the control method described in the present technical solution is simple to operate. As long as the speed of the microcontroller and the switching speed are sufficient, the pulse number of the output can be controlled at high frequency to achieve an accurate and precise weeding effect. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the services required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is the control circuit diagram in a multi-parameter adjustable precise pulse weeding system according to an embodiment of the present invention;

[0029] Figure 2 It is the control flow chart of the microcontroller in a multi-parameter adjustable precise pulse weeding method according to an embodiment of the present invention;

[0030] Figure 3 It is the modulation waveform generated by using the advanced timer of the microcontroller in a multi-parameter adjustable precise pulse weeding method according to an embodiment of the present invention. Detailed Embodiments

[0031] The following further illustrates the present invention in conjunction with specific embodiments:

[0032] A multi-parameter adjustable precise pulse weeding system described in this embodiment includes a control circuit and a microcontroller for controlling the control circuit;

[0033] Among them, as Figure 1 shown, the control circuit includes a battery-side voltage source V L 、leakage inductance Lr , exciting inductance L m , winding L 1k , the first switching tube S1, the second switching tube S2, the third switching tube S3, the fourth switching tube S4, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4;

[0034] Battery-side voltage source V L The positive pole of is connected to the drain of the first switching tube S1, and the battery-side voltage source V L The negative pole of is connected to the source of the fourth switching tube S4 to provide energy for the control circuit;

[0035] Winding L 1k The same-named terminal of the primary side and the leakage inductance L r The positive pole of is connected, and the leakage inductance L r The negative pole of is connected to the source of the first switching tube S1. The drain of the fourth switching tube S4 is connected to the source of the first switching tube S1, the source of the fourth switching tube S4 is connected to the source of the third switching tube S3, and the drain of the third switching tube S3 is connected to the winding L 1k The different-named terminal of the primary side is connected to form the main circuit for energy transmission;

[0036] Exciting inductance L m The positive pole of is connected to the different-named terminal of the winding L 1k The negative pole of is connected to the same-named terminal of the winding L 1k The positive pole of is connected to play the role of energy storage and regulating energy transmission;

[0037] Winding L 1k The same-named terminal of the secondary side is connected to the positive pole of the first diode D1, the different-named terminal is connected to the negative pole of the third diode D3, the positive pole of the first diode D1 is connected to the negative pole of the fourth diode D4, the negative pole is connected to the negative pole of the second diode D2, the positive pole of the fourth diode D4 is connected to the positive pole of the third diode D3, the positive pole of the second diode D2 is connected to the negative pole of the third diode D3, and the positive pole of the high-voltage side load V H The positive pole of is connected to the negative pole of the second diode D2, and the negative pole is connected to the positive pole of the third diode D3 to form an energy output circuit.

[0038] The working principle of this embodiment is as follows:

[0039] Set the key parameters according to actual needs. Through the microcontroller and the control circuit, adjust the frequency and duty cycle using the modulation strategy, and adjust the number of pulses using the pulse number control strategy to achieve adjustable precise pulse weeding. The control flow chart of the microcontroller is as shown in Figure 2 shown.

[0040] Among them, the key parameters are:

[0041] <![CDATA[Battery-side voltage source V L > 0-500V <![CDATA[Leakage inductance L r > 1 uH <![CDATA[High-voltage side load V H > 0-5000V <![CDATA[Excitation inductance L m > 5 mH Power P 1 kW <![CDATA[Turns ratio N1:N2]]> 1：10 <![CDATA[Output frequency f out > 40 kHz - 100 kHz <![CDATA[Output duty cycle D out > 20％-80％

[0042] Through a microcontroller and a control circuit, the input frequency f is adjusted by a modulation strategy in and the input duty cycle D in , and the process includes:

[0043] The control circuit is controlled by the microcontroller to generate a waveform as shown Figure 3 , and the control includes:

[0044] The first switch tube S1 and the fourth switch tube S4 are complementary modulated, the second switch tube S2 and the third switch tube S3 are complementary modulated, the driving signal of the second switch tube S2 lags behind the driving signal of the first switch tube S1 by 180°, the driving signal of the third switch tube S3 lags behind the driving signal of the fourth switch tube S4 by 180°, the input cycle time is 2T s , the output pulse voltage cycle is T s , the on-time of the first switch tube S1 is D out T s , D out is the output duty cycle; through the PWM mode of the advanced timer of the microcontroller, the input frequency f in is set to half of the output frequency f out , and the input duty cycle D in is set to half of the output duty cycle D out . By dynamically adjusting the pulse duty cycle and frequency, the best parameter combination can be matched for different soil characteristics (such as humidity, texture) and weed species (such as broad-leaved weeds, gramineous weeds), so as to adapt to diverse weeding scenarios, reduce environmental disturbance while ensuring efficient killing.

[0045] The pulse number is adjusted by a pulse number control strategy, including:

[0046] Half of the output pulse number is set by the counter of the microcontroller, the clock is configured and the automatic cumulative counting is triggered at the rising edge, and then the interrupt is configured and the drive is turned off. The pulse number corresponds to different energy levels, and by accurately applying pulse energy to weeds at different growth stages and species, energy conservation and effective inactivation of weeds are achieved.

[0047] In this embodiment, the pulse number is adjustable: during the electric shock weeding process, the pulse number can be accurately set according to the required energy, effectively reducing the output of ineffective pulses, thereby reducing energy consumption.

[0048] The frequency and duty cycle are adjustable: through the PWM mode of the advanced timer of the microcontroller, the input frequency and duty cycle are set to half of the output frequency and duty cycle, making the adjustment of the frequency and duty cycle convenient and capable of meeting the requirements of various weeding scenarios and optimizing the pulse effect.

[0049] Compared with the traditional pulse control method, the strategy of controlling the number of pulses, frequency, and duty cycle is adopted in this embodiment. This method can more accurately adjust the energy output to weeds, effectively reduce the output of invalid pulses, and reduce energy consumption. In addition, the control method described in this embodiment is simple to operate. As long as the speed of the microcontroller and the switch is sufficient, the number of pulses output can be controlled at high frequency to achieve an accurate and precise weeding effect.

[0050] The above-described embodiments are only preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, any changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-parameter adjustable precision pulse weeding system, characterized in that, It includes a control circuit and a microcontroller for controlling the control circuit; Among them, the control circuit includes a battery-side voltage source V L , a leakage inductor L r , an exciting inductor L m , a winding L 1k , a first switching transistor S1, a second switching transistor S2, a third switching transistor S3, a fourth switching transistor S4, a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4; Battery-side voltage source V L The positive electrode is connected to the drain of the first switching transistor S1, and the battery-side voltage source V L The negative electrode is connected to the source of the fourth switching transistor S4 to provide energy for the control circuit; Winding L 1k The same-name terminal of the primary side and leakage inductance L r is connected to the positive electrode, and the negative electrode of leakage inductance L r is connected to the source electrode of the first switching tube S1. The drain electrode of the fourth switching tube S4 is connected to the source electrode of the first switching tube S1. The source electrode of the fourth switching tube S4 is connected to the source electrode of the third switching tube S3. The drain electrode of the third switching tube S3 is connected to the different-name terminal of the primary side of winding L 1k to form the main loop for energy transmission; Excitation inductance L m The positive pole of 1k is connected to the different-named terminal of the primary side of winding L, and the negative pole is connected to the same-named terminal of the primary side of winding L, playing the role of energy storage and regulating energy transmission; 1k ​ Winding L 1k The same-name terminal of the secondary side is connected to the positive electrode of the first diode D1, and the different-name terminal is connected to the negative electrode of the third diode D3. The positive electrode of the first diode D1 is connected to the negative electrode of the fourth diode D4, and the negative electrode is connected to the negative electrode of the second diode D2. The positive electrode of the fourth diode D4 is connected to the positive electrode of the third diode D3, and the positive electrode of the second diode D2 is connected to the negative electrode of the third diode D3. The positive electrode of the high-voltage side load V H is connected to the negative electrode of the second diode D2, and the negative electrode is connected to the positive electrode of the third diode D3, forming an energy output circuit.

2. A multi-parameter adjustable precise pulse weeding method, characterized in that It is implemented by using the multi-parameter adjustable precise pulse weeding system described in Claim 1, including: Set key parameters according to actual requirements. Through the microcontroller and control circuit, adopt a modulation strategy to adjust the input frequency f in and the input duty cycle D in , and adopt a pulse number control strategy to adjust the pulse number to achieve adjustable precision pulse weeding.

3. A multi-parameter adjustable precise pulse weeding method according to claim 2, characterized in that, The set key parameters include: Battery-side voltage source V L 、High-voltage side load V H 、Leakage inductance L r 、Magnetizing inductance L m 、Power P, turns ratio N1:N2, output frequency f out 、Output duty cycle D out 。 4. A multi-parameter adjustable precise pulse weeding method according to claim 2, characterized in that, Adjust the input frequency f using a modulation strategy in and the input duty cycle D in , including: The control circuit is controlled by the microcontroller, and the control includes: The first switching transistor S1 and the fourth switching transistor S4 are complementary modulated, and the second switching transistor S2 and the third switching transistor S3 are complementary modulated. The driving signal of the second switching transistor S2 lags behind the driving signal of the first switching transistor S1 by 180°, and the driving signal of the third switching transistor S3 lags behind the driving signal of the fourth switching transistor S4 by 180°. The input cycle time is 2T s , and the output pulse voltage cycle is T s . The turn-on time of the first switching transistor S1 is D out T s , and D out is the output duty cycle. Through the PWM mode of the advanced timer of the microcontroller, the input frequency f in is set to half of the output frequency f out , and the input duty cycle D in is set to half of the output duty cycle D out .

5. A multi-parameter adjustable precise pulse weeding method according to claim 2, characterized in that, The pulse number is adjusted by using the pulse number control strategy, including: Set half of the output pulse number through the counter of the microcontroller, configure the clock and trigger automatic cumulative counting at the rising edge, and then configure the interrupt and turn off the drive.

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