Solar drip irrigation system

Abstract

The utility model discloses a solar drip irrigation system which comprises a water pump and a water pump controller which is connected with the water pump and controls the water pump, and further comprises a solar module which is connected with the water pump and the water pump controller and provides electric energy for the water pump and the water pump controller. The solar panel is connected with the solar module; the water pump driving circuit is connected with the control circuit and the water pump and drives the water pump to work; the water pump current detection circuit is connected with the water pump driving circuit and the control circuit, the water pump current detection circuit detects the working current of the water pump and outputs the detected working current of the water pump to the control circuit, and when the control circuit detects that the working current of the water pump is smaller than a preset current, the control circuit controls the water pump to work. And a water shortage shutdown instruction is output to the water pump driving circuit, and the water pump is controlled to stop working. The utility model has the advantages of simple structure and low cost.

Description

Technical Field

[0001] This utility model relates to a drip irrigation system, and more specifically, a solar drip irrigation system. Background Technology

[0002] Plants typically require frequent watering to maintain the moisture needed for growth. With rising living standards, gardening and flower cultivation have become an important part of people's lives. Current watering methods usually involve manual or automatic drip irrigation systems. Automatic drip irrigation systems are powered and controlled by a controller to water plants at set times. Since automatic drip irrigation systems typically include a water pump, a water level sensor is usually included to prevent the pump from running dry due to insufficient water in the tank. This sensor outputs a stop signal to the pump when the water level is detected to be below a set level, causing the pump to stop operating and protecting itself. However, existing drip irrigation systems require a water level sensor, making their structure relatively complex and costly. Utility Model Content

[0003] To address the technical problems of existing drip irrigation systems requiring water level sensors, which result in complex structures and high costs, this invention provides a solar-powered drip irrigation system.

[0004] To solve the above-mentioned technical problems, the present invention adopts a solar drip irrigation system, including a water pump and a water pump controller connected to and controlling the water pump. The solar drip irrigation system further includes a solar module connected to the water pump and the water pump controller and providing power to the water pump and the water pump controller. The water pump controller includes:

[0005] A control circuit, which is connected to the solar module;

[0006] A water pump drive circuit is connected to the control circuit and the water pump and drives the water pump to work.

[0007] A water pump current detection circuit is connected to the water pump drive circuit and the control circuit. The water pump current detection circuit detects the operating current of the water pump and outputs the detected operating current of the water pump to the control circuit. When the control circuit detects that the operating current of the water pump is less than a preset current, it outputs a water shortage shutdown command to the water pump drive circuit to control the water pump to stop working.

[0008] The control circuit includes a microcontroller, which has a motor control signal output terminal and an analog-to-digital converter terminal. The water pump drive circuit includes:

[0009] The first resistor has one end connected to the motor control output terminal of the control circuit;

[0010] The first field-effect transistor has its gate connected to the other end of the first resistor and its drain connected to the negative terminal of the water pump.

[0011] The second resistor has one end connected to the other end of the first resistor, and the other end grounded.

[0012] The third resistor has one end connected to the source of the first field-effect transistor and the other end grounded.

[0013] The first diode has its positive terminal connected to the drain of the first field-effect transistor, and its negative terminal connected to the positive terminal of the water pump and the solar module.

[0014] One end of the water pump current detection circuit is connected to one end of the third resistor, and the other end is connected to the analog-to-digital converter of the microcontroller.

[0015] The microcontroller is model STC15W408AS.

[0016] The solar module includes a solar panel and a battery connected to the solar panel. The control circuit and the water pump drive circuit are both connected to the battery.

[0017] The water pump has an inlet and an outlet; the solar drip irrigation system also includes:

[0018] The water inlet pipe is connected to the water inlet of the water pump;

[0019] The outlet pipe is connected to the outlet of the water pump;

[0020] A water storage device, wherein the water inlet pipe is inserted into the water storage device.

[0021] The solar drip irrigation system also includes:

[0022] A filter is connected to the bottom end of the inlet pipe and is located below or at the bottom of the water storage device.

[0023] The solar drip irrigation system also includes a drip irrigation network connected to the outlet pipe. The drip irrigation network includes multiple drip irrigation pipes, multi-port connectors connecting the drip irrigation pipes, and drip heads located at the ends of the drip irrigation pipes.

[0024] The solar drip irrigation system also includes:

[0025] A soil moisture detection sensor is electrically connected to the control circuit. The soil moisture detection sensor detects the soil moisture and sends the detected moisture signal to the control circuit. The control circuit controls the water pump to work when the soil moisture is lower than a preset range.

[0026] This invention utilizes a water pump, a water pump controller, and a solar module. The solar module generates electricity to power the water pump and controller. The water pump controller includes a control circuit, a water pump drive circuit, and a water pump current detection circuit. The water pump current detection circuit detects the water pump's operating current and outputs the detected current to the control circuit. When the control circuit detects that the water pump's operating current is less than a preset current, it outputs a water shortage shutdown command to the water pump drive circuit, controlling the water pump to stop working. Because it eliminates the need for a traditional water level sensor and instead determines the water storage device's water availability by detecting the water pump's operating current, the structure is simpler and the cost is lower. Attached Figure Description

[0027] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the solar drip irrigation system of this utility model;

[0029] Figure 2 This is a circuit diagram of a specific embodiment of the solar drip irrigation system of this utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the solar drip irrigation system of this utility model. Detailed Implementation

[0031] The specific embodiments of this utility model are further described below with reference to the accompanying drawings:

[0032] Please see also Figures 1 to 3 This utility model's solar-powered drip irrigation system includes a water pump 1, a water pump controller 2, and a solar module 3. Wherein:

[0033] Water pump 1 is used to draw water from the water storage device and deliver it to the plants. The water pump can be implemented using existing water pumps.

[0034] The water pump controller 2 is connected to and controls the water pump. The water pump controller 2 includes a control circuit 21, a water pump drive circuit 22, and a water pump current detection circuit 23. Wherein:

[0035] The control circuit 21 is connected to the solar module. The control circuit performs a control function; in this specific embodiment, the control circuit is implemented using a microcontroller and its peripheral circuits.

[0036] The water pump drive circuit 22 is connected to the control circuit and the water pump and drives the water pump to work. The water pump drive circuit is used to receive control commands from the control circuit and drive the water pump to work or stop working.

[0037] The water pump current detection circuit 23 is connected to the water pump drive circuit and control circuit. The water pump current detection circuit detects the operating current of the water pump and outputs the detected operating current to the control circuit. When the control circuit detects that the operating current of the water pump is less than a preset current, it outputs a water shortage shutdown command to the water pump drive circuit, controlling the water pump to stop working. The operating current of the water pump can be obtained by detecting the voltage across the resistor, and then converting the voltage into current. The water pump current detection circuit detects an analog signal. Since the preset current in the control circuit is usually a digital signal, the analog-to-digital converter circuit built into the microcontroller or a separately set analog-to-digital converter circuit can be used to convert the analog signal to the digital signal.

[0038] The solar module 3 is connected to the water pump and water pump controller and provides power to them. In this specific embodiment, the solar module includes a solar panel and a battery BAT connected to the solar panel. The control circuit and the water pump drive circuit are both connected to the battery. The solar panel charges the battery.

[0039] During operation, the water pump controller monitors the pump's operating current in real time. If the current is lower than normal, it determines the water tank is empty or low on water and stops the pump. The current data indicating water presence or absence is obtained through testing, calculation, and accumulation, and stored in the pump controller for comparison. The pump controller analyzes the current data to determine the presence or absence of water in the tank. Naturally, if the current is within the normal range, the controller will control the pump to operate normally. This application's method for detecting water pump current to determine the presence or absence of water in the tank eliminates the need for traditional electrode-based detection methods, removing electrode detection lines and circuitry, significantly simplifying the equipment and reducing its complexity.

[0040] This invention utilizes a water pump, a water pump controller, and a solar module. The solar module generates electricity to power the water pump and controller. The water pump controller includes a control circuit, a water pump drive circuit, and a water pump current detection circuit. The water pump current detection circuit detects the water pump's operating current and outputs the detected current to the control circuit. When the control circuit detects that the water pump's operating current is less than a preset current, it outputs a water shortage shutdown command to the water pump drive circuit, controlling the water pump to stop working. Because it eliminates the need for a traditional water level sensor and instead determines the water storage device's water availability by detecting the water pump's operating current, the structure is simpler and the cost is lower.

[0041] In this specific embodiment, the control circuit includes a microcontroller U1, which has a motor control signal output terminal MOTO and an analog-to-digital converter I_AD. In this specific embodiment, the microcontroller U1 is model STC15W408AS.

[0042] The water pump drive circuit includes a first resistor R14, a first field-effect transistor Q1, a second resistor R15, a third resistor R16, and a first diode D5. Wherein:

[0043] One end of the first resistor R14 is connected to the motor control output terminal MOTO of the control circuit.

[0044] The gate of the first field-effect transistor Q1 is connected to the other end of the first resistor R14, and its drain is connected to the negative terminal of the water pump. The first field-effect transistor acts as a switch. When it receives a work command from the microcontroller U1, the first field-effect transistor turns on, the battery BAT supplies power to the water pump, and the water pump starts working, pumping water from the water storage device. When it receives a stop command from the microcontroller U1, the first field-effect transistor turns off, disconnecting the power supply circuit from the battery to the water pump, and the water pump stops working.

[0045] One end of the second resistor R15 is connected to the other end of the first resistor, and the other end is grounded.

[0046] One end of the third resistor R16 is connected to the source of the first field-effect transistor Q1, serving as a current detection and sampling function; the other end is grounded. The first and second resistors act as bias voltages, ensuring the normal operation of the first field-effect transistor.

[0047] The positive terminal of the first diode D5 is connected to the drain of the first field-effect transistor Q1, and the negative terminal is connected to the positive terminal of the water pump and the solar module. The first diode mainly serves a protective function, preventing the reverse electromotive force of the water pump from burning out the first field-effect transistor Q1.

[0048] One end of the water pump current detection circuit is connected to one end of the third resistor, and the other end is connected to the analog-to-digital converter (ADC) of the microcontroller. The water pump current detection circuit can be a single wire connecting the microcontroller and the third resistor, or it can be supplemented with other circuits, such as an ADC circuit or a voltage conversion circuit. In this specific embodiment, the water pump current detection circuit is a wire, and the ADC is implemented using the microcontroller's built-in ADC circuit. The water pump current detection circuit detects the voltage of the third resistor, converts it into a current signal, and compares it with a preset current within the microcontroller. When the detected operating current is less than the preset current, a water shortage shutdown command is output to the water pump drive circuit to control the water pump to stop working.

[0049] In this specific embodiment, the water pump 1 has an inlet 11 and an outlet 12; the solar drip irrigation system further includes an inlet pipe 4, an outlet pipe 5, a water storage device 6, a filter 7, and a drip irrigation network 8. Wherein:

[0050] The inlet pipe 4 is connected to the inlet of the water pump.

[0051] The outlet pipe 5 is connected to the outlet of the water pump.

[0052] The water storage device 6 is used to store water, and the inlet pipe 4 is inserted into the water storage device. The water pump draws water from the water storage device and delivers it to the drip irrigation network in sequence through the inlet pipe, the inlet, the outlet, and the outlet pipe.

[0053] The filter 7 is connected to the bottom end of the inlet pipe and is located below or at the bottom of the water storage device. The filter is mainly used to filter impurities in the water to prevent impurities from clogging the inlet and outlet pipes.

[0054] The drip irrigation network 8 is connected to the outlet pipe. The drip irrigation network 8 includes multiple drip irrigation pipes 81, multi-port connectors 82 connecting the drip irrigation pipes, and drip irrigation heads 83 located at the ends of the drip irrigation pipes. Each drip irrigation head corresponds to a plant that needs to be irrigated, thereby enabling drip irrigation of multiple plants.

[0055] In this specific embodiment, to make the drip irrigation system more intelligent, the solar drip irrigation system also includes a soil moisture detection sensor. The soil moisture detection sensor is electrically connected to the control circuit. The soil moisture detection sensor detects the soil moisture and sends the detected moisture signal to the control circuit. The control circuit controls the water pump to operate when the soil moisture is below a preset range. Thus, irrigation can be determined based on soil moisture to achieve on-demand irrigation and save water resources.

[0056] This invention utilizes a water pump, a water pump controller, and a solar module. The solar module generates electricity to power the water pump and controller. The water pump controller includes a control circuit, a water pump drive circuit, and a water pump current detection circuit. The water pump current detection circuit detects the water pump's operating current and outputs the detected current to the control circuit. When the control circuit detects that the water pump's operating current is less than a preset current, it outputs a water shortage shutdown command to the water pump drive circuit, controlling the water pump to stop working. Because it eliminates the need for a traditional water level sensor and instead determines the water storage device's water availability by detecting the water pump's operating current, the structure is simpler and the cost is lower.

[0057] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A solar drip irrigation system comprising a water pump and a water pump controller connected to the water pump and controlling the water pump, characterized in that: The solar drip irrigation system further comprises a solar module connected with the water pump and the water pump controller and providing electric energy for the water pump and the water pump controller, the water pump controller comprising: a control circuit connected with the solar module; a water pump driving circuit connected with the control circuit and the water pump and driving the water pump to work; a water pump current detection circuit connected with the water pump driving circuit and the control circuit, the water pump current detection circuit detecting the working current of the water pump and outputting the detected working current of the water pump to the control circuit, the control circuit outputting a water shortage shutdown instruction to the water pump driving circuit to control the water pump to stop working when the working current of the water pump is detected to be less than a preset current.

2. The solar drip irrigation system of claim 1, wherein: The control circuit comprises a single-chip microcomputer, the single-chip microcomputer having a motor control output end and an analog-digital conversion end, and the water pump driving circuit comprising: a first resistor having one end connected with the motor control output end of the control circuit; a first field effect transistor having a gate connected with the other end of the first resistor and a drain connected with the negative pole of the water pump; a second resistor having one end connected with the other end of the first resistor and the other end grounded; a third resistor having one end connected with the source of the first field effect transistor and the other end grounded; a first diode having a positive pole connected with the drain of the first field effect transistor and a negative pole connected with the positive pole of the water pump and the solar module; one end of the water pump current detection circuit being connected with one end of the third resistor and the other end being connected with the analog-digital conversion end of the single-chip microcomputer.

3. The solar drip irrigation system of claim 2, wherein: The model of the single-chip microcomputer is STC15W408AS.

4. The solar drip irrigation system of claim 1, wherein: The solar module comprises a solar panel and a storage battery connected with the solar panel, and the control circuit and the water pump driving circuit are both connected with the storage battery.

5. The solar drip irrigation system of claim 4, wherein: The water pump has a water inlet and a water outlet, and the solar drip irrigation system further comprises: a water inlet pipe connected with the water inlet of the water pump; a water outlet pipe connected with the water outlet of the water pump; a water storage device, the water inlet pipe being inserted in the water storage device.

6. The solar drip irrigation system of claim 5, wherein: The solar drip irrigation system further comprises: a filter connected with the bottom end of the water inlet pipe and located below the water surface or at the bottom of the water storage device.

7. The solar drip irrigation system of claim 6, wherein: The solar drip irrigation system further comprises a drip irrigation pipe network connected with the water outlet pipe, the drip irrigation pipe network comprising a plurality of drip irrigation pipes, a multi-way joint connecting the drip irrigation pipes, and a drip irrigation head arranged at the end of the drip irrigation pipe.

8. The solar drip irrigation system of claim 7, wherein: The solar drip irrigation system further comprises: a soil humidity detection sensor electrically connected with the control circuit, the soil humidity detection sensor detecting the humidity of the soil and sending a detected humidity signal to the control circuit, the control circuit controlling the water pump to work when the humidity of the soil is detected to be lower than a preset range.

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