Timed watering system in greenhouse

Abstract

The utility model discloses a timed watering system in a greenhouse, belongs to the technical field of greenhouses, and solves the problems that for farmers, a large amount of time needs to be consumed for opening and closing drip irrigation pipes everyday, and meanwhile, the situation of missing closing or missing opening also occurs. The water pump is used for pumping and supplying water; the timing switch circuit is used for timing and providing a timing signal within the timing time; the controlled end of the relay is coupled with the output end of the timing switch circuit, the relay is connected with the water pump in series, and the relay controls the water pump to be powered on according to the timing signal. The water pump is controlled to work through the timing circuit, and the drip irrigation requirement is met; at high temperature, the temperature sensor triggers the clock signal circuit, and after timing, the controller switches on the relay to continuously supply water so as to prevent plants from withering.

Description

Technical Field

[0001] The utility model relates to the technical field of greenhouses, in particular to a timed sprinkler system in a greenhouse. Background Art

[0002] Greenhouse cultivation is a modern agricultural technology that uses a specific structure to create a controllable environment to protect crops from adverse external climatic conditions. This cultivation method can increase the yield and quality of crops, extend the growing season, and reduce the occurrence of pests and diseases.

[0003] During the process of growing plants in a greenhouse, it is necessary to sprinkle water on the plants. Otherwise, the plants will dry up and wither. Currently, the commonly used method is drip irrigation. However, the drip irrigation method always keeps dripping and continuously waters the plants by dripping. Usually, it is necessary to manually turn on the drip irrigation. For farmers, turning on and off the drip irrigation pipes everywhere every day takes a lot of time, and there will also be situations of missing to turn off or turn on.

[0004] Therefore, a timed sprinkler system in a greenhouse is proposed to solve or alleviate the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies in the prior art and propose a timed sprinkler system in a greenhouse.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A timed sprinkler system in a greenhouse, comprising

[0008] A water pump for pumping water for supply;

[0009] A timed switch circuit for timing and providing a timing signal within the timing time;

[0010] A relay, the controlled end of the relay is coupled to the output end of the timed switch circuit, the relay is connected in series with the water pump, and the relay controls the water pump to conduct power according to the timing signal.

[0011] Preferably, it further comprises a temperature control circuit, the output end of the temperature control circuit is coupled to the controlled end of the relay, and the temperature control circuit controls the relay to be powered on according to the ambient temperature.

[0012] Preferably, the temperature control circuit comprises

[0013] A temperature sensor, the temperature sensor is arranged in the greenhouse, and the temperature sensor detects the ambient temperature in the greenhouse and feeds back a temperature signal;

[0014] A voltage comparison circuit, the input end of the voltage comparison circuit is coupled to the output end of a temperature sensor, and the voltage comparison circuit outputs a comparison signal in response to the temperature signal being greater than the temperature reference signal;

[0015] A clock signal circuit, its input end is coupled to the output end of the voltage comparison circuit, and the clock signal circuit times in response to the comparison signal and outputs a clock signal within the timing time;

[0016] A controller, the input end of the controller is coupled to the output end of the clock signal circuit, and the controller outputs a control signal to a relay in response to the clock signal and controls the relay to conduct.

[0017] Preferably, the timing switch circuit includes a timer and a first triode switch. The output end of the timer is coupled to the base of the first triode switch. The collector of the first triode switch is connected to a zener diode and then powered, and the emitter of the first triode switch is grounded.

[0018] Preferably, the temperature sensor is a thermistor.

[0019] Preferably, the voltage comparison circuit includes an LM339 voltage comparator.

[0020] Preferably, the clock signal circuit includes an inverter and a 555 time base chip, and the inverter is connected to the input end of the 555 time base chip.

[0021] Preferably, the controller includes an STM32F103RCT6 embedded microcontroller.

[0022] The utility model has the following beneficial effects:

[0023] The utility model controls the operation of a water pump through a timing circuit to meet the drip irrigation requirements. When the temperature is high, the temperature sensor triggers the clock signal circuit. After timing, the controller conducts the relay to continuously supply water and prevent the plants from withering. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a structural block diagram of the present utility model;

[0026] Figure 2 It is a wiring diagram of the timing switch circuit, the relay and the water pump in the present utility model;

[0027] Figure 3 This is the wiring diagram of the temperature sensor, voltage comparison circuit, and clock signal circuit in the present utility model.

[0028] 1. Timing switch circuit; 2. Relay; 3. Water pump; 4. Controller; 5. Clock signal circuit; 6. Voltage comparison circuit; 7. Temperature sensor. Specific embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Components of the embodiments of the present utility model described and illustrated in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0031] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the utility model product is customarily placed during use, or the orientation or positional relationships commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0033] In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0034] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arrangement", "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] A timed sprinkler system in a greenhouse, as Figures 1 - 3 shown, includes a water pump 3, a timed switch circuit 1, a relay 2, and a temperature control circuit. The output end of the temperature control circuit is coupled to the controlled end of the relay 2. The temperature control circuit controls the relay 2 to be powered on according to the ambient temperature. The temperature control circuit includes a temperature sensor 7, a voltage comparison circuit 6, a clock signal circuit 5, and a controller 4. The timed switch circuit 1 includes a timer and a triode switch one. The output end of the timer is coupled to the base of the triode switch one. The collector of the triode switch one is connected to a zener diode and then powered. The emitter of the triode switch one is grounded. The temperature sensor 7 is a thermistor. The voltage comparison circuit 6 includes an LM339 voltage comparator. The clock signal circuit 5 includes an inverter and a 555 time base chip. The inverter is connected to the input end of the 555 time base chip. The controller 4 includes an STM32F103RCT6 embedded microcontroller.

[0036] The water pump 3 is used to pump water for supply; the timed switch circuit 1 is used to time and provide a timing signal within the timing time; the controlled end of the relay 2 is coupled to the output end of the timed switch circuit 1. The relay 2 is connected in series with the water pump 3. The relay 2 controls the water pump 3 to conduct power according to the timing signal; the temperature sensor 7 is arranged in the greenhouse, and the temperature sensor 7 detects the ambient temperature in the greenhouse and feeds back a temperature signal; the voltage comparison circuit 6, the input end of the voltage comparison circuit 6 is coupled to the output end of the temperature sensor 7. The voltage comparison circuit 6 outputs a comparison signal in response to the temperature signal being greater than the temperature reference signal; the clock signal circuit 5, its input end is coupled to the output end of the voltage comparison circuit 6. The clock signal circuit 5 times in response to the comparison signal and outputs a clock signal within the timing time; the controller 4, the input end of the controller 4 is coupled to the output end of the clock signal circuit 5. The controller 4 outputs a control signal to the relay 2 in response to the clock signal and controls the relay 2 to conduct.

[0037] When the utility model is actually applied, the timing switch circuit 1 is used for timing, and during the timing period, the relay 2 is controlled to conduct, so that the water pump 3 is powered on to work and pump water, thereby meeting the water demand for drip irrigation. When the temperature is relatively high, the temperature sensor 7 can collect the environmental temperature in the greenhouse and provide a temperature signal to the voltage comparison circuit 6. After comparing the temperature signal with the temperature reference signal, the voltage comparison circuit 6 outputs a comparison signal to the clock signal circuit 5. The clock signal circuit 5 converts the high-level comparison signal into a low-level comparison signal through an inverter and gives it to the 555 time base chip therein, so that it starts timing and sends a clock signal to the controller 4 within the timing period. After receiving the clock signal, the controller 4 controls the relay 2 to conduct, so that the water pump 3 can continue to supply water to the plants, avoiding the problem that the plants die due to high temperature in hot weather.

[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A timed sprinkler system in a greenhouse, characterized in that: include A water pump (3) for pumping water for water supply; A timing switch circuit (1) for timing and providing a timing signal within the timing time; A relay (2), wherein a controlled end of the relay (2) is coupled to an output end of a timing switch circuit (1), the relay (2) is connected in series with a water pump (3), and the relay (2) controls the water pump (3) to turn on power according to a timing signal.

2. A timed sprinkler system in a greenhouse according to claim 1, characterized in that: It also comprises a temperature control circuit, the output end of which is coupled to the controlled end of the relay (2), and the temperature control circuit controls the relay (2) to be energized according to the ambient temperature.

3. A timed sprinkler system in a greenhouse according to claim 2, characterized in that: The temperature control circuit comprises A temperature sensor (7), wherein the temperature sensor (7) is arranged in the greenhouse, and the temperature sensor (7) detects the ambient temperature in the greenhouse and feeds back a temperature signal; A voltage comparison circuit (6), wherein an input end of the voltage comparison circuit (6) is coupled to an output end of a temperature sensor (7), and the voltage comparison circuit (6) outputs a comparison signal in response to the temperature signal being greater than a temperature reference signal; A clock signal circuit (5), whose input end is coupled to the output end of the voltage comparison circuit (6), wherein the clock signal circuit (5) counts in response to the comparison signal and outputs a clock signal within the timing time; A controller (4), wherein an input end of the controller (4) is coupled to an output end of a clock signal circuit (5), and the controller (4) outputs a control signal to the relay (2) in response to the clock signal and controls the relay (2) to be turned on.

4. A timed sprinkler system in a greenhouse according to claim 1, characterized in that: The timing switch circuit (1) comprises a timer and a transistor switch 1, wherein the output end of the timer is coupled to the base of the transistor switch 1, the collector of the transistor switch 1 is connected to a voltage-stabilizing diode and then to electricity, and the emitter of the transistor switch 1 is grounded.

5. A timed sprinkler system in a greenhouse according to claim 3, characterized in that: The temperature sensor (7) is a thermistor.

6. A timed sprinkler system in a greenhouse according to claim 3, characterized in that: The voltage comparison circuit (6) comprises an LM339 voltage comparator.

7. A timed sprinkler system in a greenhouse according to claim 3, characterized in that: The clock signal circuit (5) comprises an inverter and a 555 time base chip, wherein the inverter is connected to the input end of the 555 time base chip.

8. A timed sprinkler system in a greenhouse according to claim 3, characterized in that: The controller (4) comprises an STM32F103RCT6 embedded microcontroller.

Images