Greenhouse environment monitoring system

Abstract

The utility model provides a greenhouse environment monitoring system, and belongs to the technical field of environment monitoring. The greenhouse environment monitoring system comprises a light intensity detection module, a dimming module, a temperature detection module, a high temperature comparison module, a low temperature comparison module, a heating control module, a ventilation control module and a main control module. The output ends of the light intensity detection module and the temperature detection module are connected with the main control module; the control end of the dimming module is connected with the output end of the light intensity detection module; the input ends of the high-temperature comparison module and the low-temperature comparison module are connected with the output end of the temperature detection module, the output end of the high-temperature comparison module is connected with the control end of the ventilation control module, and the output end of the low-temperature comparison module is connected with the control end of the heating control module; first ends of the high-temperature comparison module and the low-temperature comparison module are connected with a power supply, a second end of the high-temperature comparison module is connected with heating equipment, and a second end of the low-temperature comparison module is connected with ventilation equipment. According to the invention, precise control of the greenhouse environment can be realized.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of environmental monitoring, and particularly relates to a greenhouse environmental monitoring system. BACKGROUND

[0002] With the rapid development of modern agriculture, greenhouse planting has become an important means to improve crop yield and quality. The application of greenhouse environmental monitoring system is crucial for improving crop yield and quality. Traditional greenhouse management often relies on manual experience and regular detection, which is not only inefficient, but also difficult to achieve precise control of the greenhouse environment. With the rapid development of Internet of Things and intelligent control technology, there is an urgent need for a monitoring system that can monitor and automatically adjust the parameters of the greenhouse environment in real time. CONTENT OF THE UTILITY MODEL

[0003] The present disclosure provides a greenhouse environmental monitoring system to achieve precise control of the greenhouse environment.

[0004] The present disclosure provides a greenhouse environmental monitoring system, comprising:

[0005] a light intensity detection module, a light adjustment module, a temperature detection module, a high-temperature comparison module, a low-temperature comparison module, a heating control module, a ventilation control module, a main control module, and an alarm module;

[0006] The output ends of the light intensity detection module, the temperature detection module, and the alarm module are connected to the main control module. The light intensity detection module is configured to detect the light intensity of the greenhouse, and the temperature detection module is configured to detect the temperature of the greenhouse.

[0007] The control end of the light adjustment module is connected to the output end of the light intensity detection module.

[0008] The input ends of the high-temperature comparison module and the low-temperature comparison module are connected to the output end of the temperature detection module. The output end of the high-temperature comparison module is connected to the control end of the ventilation control module, and the output end of the low-temperature comparison module is connected to the control end of the heating control module.

[0009] The first ends of the high-temperature comparison module and the low-temperature comparison module are connected to the power supply. The second end of the high-temperature comparison module is connected to the power supply end of the heating device, and the second end of the low-temperature comparison module is connected to the power supply end of the ventilation device.

[0010] In an exemplary embodiment of the present disclosure, a communication module is further included.

[0011] The main control module is in communication connection with the monitoring platform through the communication module.

[0012] In an exemplary embodiment of the present disclosure, the light intensity detection module comprises a variable resistor RP1, a variable resistor RP2, a first light-dependent resistor U1, a resistor R3, a voltage stabilizing tube D1, and an operational amplifier A1.

[0013] The first end of the rheostat RP1 is connected to the VCC power supply, the second end of the rheostat RP1 is grounded through the photosensitive resistor U1, the first end of the rheostat RP2 is connected to the VCC power supply, the second end of the rheostat RP2 is grounded through the resistor R3, the inverting input end of the operational amplifier A1 is connected to the second end of the rheostat RP1, the non-inverting input end of the operational amplifier A1 is connected to the second end of the rheostat RP2, the cathode of the stabilizing tube D1 is connected to the non-inverting input end of the operational amplifier A1, the anode of the stabilizing tube D1 is grounded, and the output end of the operational amplifier A1 is connected to the control end of the light modulation module.

[0014] In an exemplary embodiment of the present disclosure, the light modulation module comprises a switch tube Q1, a timer U2, a resistor R1, a second photosensitive resistor U3, a capacitor C3, a triode Q3, a resistor R7, a triode Q2, and a supplementary light lamp H1.

[0015] The control end of the switch tube Q1 is connected to the output end of the light intensity detection module, the first end of the switch tube Q1 is connected to the VEE power supply, the second end of the switch tube Q1 is connected to the power supply end of the timer U2, the power supply end of the timer U2 is connected to the discharge end of the timer U2 through the resistor R1, the discharge end of the timer U2 is connected to the low trigger end of the timer U2 through the second photosensitive resistor U3, the low trigger end of the second photosensitive resistor U3 is grounded through the capacitor C3, and the output end of the timer U2 is connected to the base of the triode Q3.

[0016] The collector of the triode Q3 is connected to the VEE power supply, the emitter of the triode Q3 is grounded through the resistor R7, the emitter of the triode Q3 is connected to the base of the triode Q2, the collector of the triode Q2 is connected to the VDD power supply, the emitter of the triode Q2 is connected to the first end of the supplementary light lamp H1, and the second end of the supplementary light lamp H1 is grounded.

[0017] In an exemplary embodiment of the present disclosure, the temperature detection module comprises a thermistor RT, a resistor R9, a triode Q4, and a resistor R10.

[0018] The first end of the thermistor RT is connected to the VCC power supply, the second end of the thermistor RT is connected to the base of the triode Q4, the second end of the thermistor RT is grounded through the resistor R9, the collector of the triode Q4 is connected to the VCC power supply, the emitter of the triode Q4 is grounded through the resistor R10, and the emitter of the triode Q4 is connected to the input ends of the high-temperature comparison module and the low-temperature comparison module, respectively.

[0019] In an exemplary embodiment of the present disclosure, it further comprises a reference module.

[0020] The reference module is configured to provide reference voltage to the high-temperature comparison module and the low-temperature comparison module.

[0021] The reference module includes: rheostat RP3, resistor R11, and resistor R12;

[0022] The high-temperature comparison module includes operational amplifier A2; the low-temperature comparison module includes operational amplifier A3.

[0023] The first terminal of the variable resistor RP3 is connected to the VCC power supply. The second terminal of the variable resistor RP3 is connected to the first terminal of the resistor R12 through the resistor R11. The second terminal of the variable resistor RP3 is connected to the inverting input terminal of the operational amplifier A2. The second terminal of the resistor R11 is connected to the non-inverting input terminal of the operational amplifier A3. The second terminal of the resistor R11 is grounded through the resistor R12. The non-inverting input terminal of the operational amplifier A2 and the inverting input terminal of the operational amplifier A3 are both connected to the output terminal of the temperature detection module.

[0024] The output of operational amplifier A2 is connected to the control terminal of the ventilation control module, and the output of operational amplifier A3 is connected to the control terminal of the heating control module.

[0025] In one exemplary embodiment of this disclosure, the ventilation control module includes a switching tube Q5; the heating control module includes a switching tube Q6.

[0026] The control terminal of the switching transistor Q5 is connected to the output terminal of the high temperature comparator module, the first terminal of the switching transistor Q5 is connected to the VDD power supply, and the second terminal of the switching transistor Q5 is connected to the power supply terminal of the ventilation equipment.

[0027] The control terminal of the switching transistor Q6 is connected to the output terminal of the low-temperature comparator module, the first terminal of the switching transistor Q6 is connected to the VDD power supply, and the second terminal of the switching transistor Q6 is connected to the power supply terminal of the heating equipment.

[0028] In one exemplary embodiment of this disclosure, it further includes: a greenhouse gas cycle control module;

[0029] The greenhouse gas cycle control module includes: OR gate U4 and switching transistor Q7;

[0030] The first input terminal of OR gate U4 is connected to the output terminal of operational amplifier A2, the second input terminal of OR gate U4 is connected to the output terminal of operational amplifier A3, the output terminal of OR gate U4 is connected to the control terminal of switch transistor Q7, the first terminal of switch transistor Q7 is connected to VDD power supply, and the second terminal of switch transistor Q7 is connected to greenhouse gas circulation equipment.

[0031] In one exemplary embodiment of this disclosure, it further includes: a carbon dioxide detection module, a carbon dioxide comparison module, and an OR gate U5;

[0032] The output of the carbon dioxide detection module is connected to the main control module, the output of the carbon dioxide detection module is connected to the input of the carbon dioxide comparison module, the output of the carbon dioxide comparison module is connected to the first input of OR gate U5, the second input of OR gate U5 is connected to the output of the high temperature comparison module, and the output of OR gate U5 is connected to the control terminal of the ventilation control module.

[0033] The beneficial effects of the greenhouse environment monitoring system provided in this disclosure are as follows: This embodiment, through the cooperation of light intensity detection and a dimming module, can adjust the light intensity in real time to ensure that crops receive suitable light, which is beneficial to photosynthesis and growth. The temperature detection module, combined with high-temperature comparison and low-temperature comparison modules, can accurately compare the actual temperature with the set value, automatically controlling ventilation or heating equipment to maintain a stable greenhouse temperature. The main control module integrates light and temperature information for comprehensive decision-making and coordination. When environmental parameters exceed the range and the system cannot adjust automatically, the main control module triggers the alarm module to remind staff and enable timely manual intervention. This achieves intelligent and precise monitoring and adjustment of the greenhouse environment, creating a favorable environment for crop growth and improving production efficiency and quality. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this disclosure, 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 this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a greenhouse environment monitoring system provided in one embodiment of the present disclosure;

[0036] Figure 2 This is a circuit diagram of a greenhouse environment monitoring system provided in one embodiment of the present disclosure;

[0037] Figure 3 This is a circuit diagram of a greenhouse environment monitoring system provided in another embodiment of this disclosure;

[0038] Figure 4 This is a schematic diagram of the structure of a greenhouse environment monitoring system provided in another embodiment of the present disclosure. Detailed Implementation

[0039] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.

[0040] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.

[0041] The implementation of this disclosure will be described in detail below with reference to the specific accompanying drawings:

[0042] Figure 1 This is a schematic diagram of a greenhouse environment monitoring system provided in an embodiment of this disclosure. (Refer to...) Figure 1 The greenhouse environment monitoring system includes:

[0043] Light intensity detection module, dimming module, temperature detection module, high temperature comparison module, low temperature comparison module, heating control module, ventilation control module, main control module, and alarm module;

[0044] The outputs of the light intensity detection module, temperature detection module, and alarm module are all connected to the main control module. The light intensity detection module is configured to detect the light intensity of the greenhouse, and the temperature detection module is configured to detect the temperature of the greenhouse.

[0045] The control terminal of the dimming module is connected to the output terminal of the light intensity detection module;

[0046] The input terminals of both the high-temperature comparison module and the low-temperature comparison module are connected to the output terminal of the temperature detection module. The output terminal of the high-temperature comparison module is connected to the control terminal of the ventilation control module, and the output terminal of the low-temperature comparison module is connected to the control terminal of the heating control module.

[0047] The first end of both the high-temperature comparison module and the low-temperature comparison module is connected to the power supply. The second end of the high-temperature comparison module is connected to the power supply of the heating equipment, and the second end of the low-temperature comparison module is connected to the power supply of the ventilation equipment.

[0048] In this embodiment, the light intensity detection module is responsible for detecting the light intensity of the greenhouse in real time and outputting the detected light intensity information to the main control module in the form of an electrical signal. It also transmits this information to the control terminal of the dimming module. The dimming module adjusts the light intensity of the greenhouse based on the signal from the light intensity detection module. For example, if the light intensity is detected to be too low, the dimming module can control the supplemental lighting equipment to turn on, increasing the light intensity.

[0049] The temperature detection module measures the temperature inside the greenhouse in real time and converts the temperature information into a voltage signal for output. This signal is transmitted to the main control module on one hand; for example, by a temperature sensor (such as a thermistor or thermocouple) sensing the temperature and converting the temperature signal into a voltage signal for output to the main control module. On the other hand, it is input to the high-temperature comparison module and the low-temperature comparison module respectively.

[0050] In this embodiment, a comparator can be used as a high-temperature comparison module and a low-temperature comparison module. The high-temperature comparison module and the low-temperature comparison module can compare the voltage signal output by the temperature detection module with the set reference voltage signal, thereby outputting the corresponding level signal to control the ventilation control module or the heating control module.

[0051] The high-temperature comparison module compares the voltage signal from the temperature detection module with its own set high-temperature reference voltage signal. When the voltage signal corresponding to the actual greenhouse temperature is higher than the high-temperature reference voltage signal, it indicates that the greenhouse temperature is too high. The high-temperature comparison module then outputs a corresponding level signal to the control terminal of the ventilation control module. Upon receiving this signal, the ventilation control module activates the ventilation equipment to lower the temperature inside the greenhouse. The low-temperature comparison module compares the voltage signal from the temperature detection module with its own set low-temperature reference voltage signal. When the voltage signal corresponding to the actual greenhouse temperature is lower than the low-temperature reference voltage signal, it indicates that the greenhouse temperature is too low. The low-temperature comparison module then outputs a corresponding level signal to the control terminal of the heating control module. Upon receiving this signal, the heating control module activates the heating equipment to raise the temperature inside the greenhouse.

[0052] The alarm module is connected to the main control module. The main control module receives light intensity information from the light intensity detection module and temperature information from the temperature detection module. When the greenhouse light intensity or temperature exceeds the normal range and cannot be restored to normal by the system itself, the main control module can send a signal to the alarm module. After receiving the signal, the alarm module will issue an alarm through sound, light, etc., to remind staff that the greenhouse environment is abnormal and requires manual intervention.

[0053] As can be seen from the above, this embodiment, through the combination of light intensity detection and a dimming module, can adjust the light intensity in real time to ensure that crops receive suitable light, which is beneficial to photosynthesis and growth. The temperature detection module, combined with the high-temperature comparison module and the low-temperature comparison module, can accurately compare the actual temperature with the set value and automatically control ventilation or heating equipment to maintain a stable greenhouse temperature. The main control module integrates light and temperature information for comprehensive decision-making and coordination. When environmental parameters exceed the range and the system cannot adjust itself, the main control module triggers the alarm module to remind staff and enable timely manual intervention. This achieves intelligent and precise monitoring and adjustment of the greenhouse environment, creating a favorable environment for crop growth and improving production efficiency and quality.

[0054] like Figure 1 As shown, in one embodiment of this disclosure, it further includes: a communication module;

[0055] The main control module communicates with the monitoring platform through the communication module.

[0056] In this implementation, the main control module can send received environmental data such as light intensity and temperature to the communication module. The communication module, based on its supported communication protocols (such as Wi-Fi, Bluetooth, ZigBee, 4G / 5G, etc.), then transmits the data to the monitoring platform via the appropriate wireless or wired communication network.

[0057] Staff can visually observe the changing trends of greenhouse environmental parameters over time through the monitoring platform; when the received data exceeds the preset normal range, timely warning information is issued, providing decision support for staff. The monitoring platform can be a mobile phone, computer, or other device. Based on the received greenhouse environmental data, staff can remotely send control commands to the main control module through the monitoring platform. These commands are transmitted back to the main control module via the communication module, and the main control module performs corresponding operations on the dimming module, ventilation control module, heating control module, etc., to achieve remote control of the greenhouse environment.

[0058] like Figure 2 As shown, in one embodiment of this disclosure, the light intensity detection module includes: a variable resistor RP1, a variable resistor RP2, a first photoresistor U1, a resistor R3, a Zener diode D1, and an operational amplifier A1;

[0059] The first terminal of rheostat RP1 is connected to the VCC power supply, and the second terminal of rheostat RP1 is grounded through the photoresistor U1. The first terminal of rheostat RP2 is connected to the VCC power supply, and the second terminal of rheostat RP2 is grounded through the resistor R3. The inverting input terminal of operational amplifier A1 is connected to the second terminal of rheostat RP1, and the non-inverting input terminal of operational amplifier A1 is connected to the second terminal of rheostat RP2. The cathode of Zener diode D1 is connected to the non-inverting input terminal of operational amplifier A1, and the anode of Zener diode D1 is grounded. The output terminal of operational amplifier A1 is connected to the control terminal of the dimming module.

[0060] In this embodiment, the variable resistor RP1 and the first photoresistor U1 form a voltage divider circuit. The resistance of the first photoresistor U1 changes according to the intensity of light in the greenhouse environment; the stronger the light intensity, the larger its resistance; the weaker the light intensity, the smaller its resistance. According to the principle of series voltage divider, the voltage across the first photoresistor U1 in this voltage divider circuit changes with its resistance. When the light intensity increases, the resistance of the first photoresistor U1 increases, and the voltage it receives also increases; when the light intensity decreases, the resistance of the first photoresistor U1 decreases, and the voltage it receives also decreases. The changing voltage across the first photoresistor U1 can be fed to the inverting input of the operational amplifier A1.

[0061] The variable resistor RP2, resistor R3, and Zener diode D1 constitute a voltage regulator circuit, which provides a stable reference voltage to the non-inverting input terminal of operational amplifier A1. When the power supply voltage fluctuates or other interference occurs in the circuit, Zener diode D1 can ensure that the voltage at the non-inverting input terminal of operational amplifier A1 remains basically unchanged through its own voltage regulation characteristics.

[0062] Operational amplifier A1 forms a comparator circuit. When the light intensity in the greenhouse is weak, the resistance of the first photoresistor U1 is small, and its voltage drop is also small, causing the voltage at the inverting input of operational amplifier A1 to be lower than the reference voltage at the non-inverting input. At this time, operational amplifier A1 outputs a high-level signal to the control terminal of the dimming module. The dimming module controls the supplementary lighting equipment to turn on according to this signal to increase the light intensity in the greenhouse.

[0063] When the greenhouse light intensity is strong, the resistance of the first photoresistor U1 is large, resulting in a larger voltage drop across it. Consequently, the voltage at the inverting input of operational amplifier A1 is higher than the reference voltage at the non-inverting input. Operational amplifier A1 outputs a low-level signal to the control terminal of the dimming module. Based on this signal, the dimming module controls the shading equipment to turn on or reduces the power of the supplemental lighting equipment, thereby reducing the light intensity in the greenhouse.

[0064] like Figure 2 As shown, in one embodiment of this disclosure, the dimming module includes: a switching transistor Q1, a timer U2, a resistor R1, a second photoresistor U3, a capacitor C3, a transistor Q3, a resistor R7, a transistor Q2, and a fill light H1;

[0065] The control terminal of the switching transistor Q1 is connected to the output terminal of the light intensity detection module. The first terminal of the switching transistor Q1 is connected to the VEE power supply. The second terminal of the switching transistor Q1 is connected to the power supply terminal of the timer U2. The power supply terminal of the timer U2 is connected to the discharge terminal of the timer U2 through the resistor R1. The discharge terminal of the timer U2 is connected to the low trigger terminal of the timer U2 through the second photoresistor U3. The low trigger terminal of the timer U2 is connected to the high trigger terminal of the timer U2. The low trigger terminal of the second photoresistor U3 is grounded through the capacitor C3. The output terminal of the timer U2 is connected to the base of the transistor Q3.

[0066] The collector of transistor Q3 is connected to the VEE power supply, the emitter of transistor Q3 is grounded through resistor R7, the emitter of transistor Q3 is connected to the base of transistor Q2, the collector of transistor Q2 is connected to the VDD power supply, the emitter of transistor Q2 is connected to the first terminal of fill light H1, and the second terminal of fill light H1 is grounded.

[0067] In this implementation, when the light intensity in the greenhouse is weak, the control terminal of the switch Q1 receives a high-level signal, the switch Q1 is turned on, and the power supply terminal of the timer U2 is connected to the power supply.

[0068] The oscillation circuit consists of timer U2, resistor R1, second photoresistor U3, and capacitor C3. A 555 timer can be used as timer U2. The resistance of the second photoresistor U3 changes with the intensity of light in the greenhouse, and its performance is the same as that of the first photoresistor U1: the stronger the light, the higher the resistance; the weaker the light, the lower the resistance. The frequency of the pulse signal output by the oscillation circuit is related to the resistance of the second photoresistor U3. When the light intensity is weak, the resistance of the second photoresistor U3 is small, and the frequency of the pulse signal output by timer U2 is low; when the light intensity further decreases, the resistance of the second photoresistor U3 increases, and the frequency of the pulse signal output by timer U2 increases accordingly.

[0069] Because the driving capability of the pulse signal output by timer U2 is weak and cannot directly drive transistor Q2, a driving circuit is constructed using transistor Q3 and resistor R7. The pulse signal output by timer U2 is input to the base of transistor Q3. When the pulse signal is high, transistor Q3 conducts, and current flows from the VEE power supply through the collector to the emitter of transistor Q3, and then to ground through resistor R7. At this time, the voltage change at the emitter of transistor Q3 controls the base of transistor Q2, causing transistor Q2 to conduct, thereby providing current to the fill light H1.

[0070] Transistor Q2 is turned on or off under the control of the driver circuit, causing the fill light H1 to blink according to the pulse signal output by timer U2. Due to the persistence of vision, the average brightness of fill light H1 changes accordingly when the pulse signal frequency changes. The higher the frequency of the pulse signal output by timer U2, the higher the proportion of time fill light H1 is lit per unit time, and the stronger its average brightness; conversely, the lower the pulse signal frequency, the weaker the average brightness of fill light H1.

[0071] As can be seen from the above, the dimming module detects the light intensity, generates pulse signals of different frequencies using an oscillation circuit, and enhances the driving capability through a drive circuit, thereby realizing the automatic adjustment of the brightness of the supplemental light to meet the light intensity requirements of greenhouse crops.

[0072] like Figure 3As shown, in one embodiment of this disclosure, the temperature detection module includes: a thermistor RT, a resistor R9, a transistor Q4, and a resistor R10;

[0073] The first terminal of the thermistor RT is connected to the VCC power supply, the second terminal of the thermistor RT is connected to the base of the transistor Q4, the second terminal of the thermistor RT is grounded through resistor R9, the collector of the transistor Q4 is connected to the VCC power supply, the emitter of the transistor Q4 is grounded through resistor R10, and the emitter of the transistor Q4 is connected to the input terminals of the high temperature comparator module and the low temperature comparator module respectively.

[0074] In this embodiment, the thermistor RT and resistor R9 form a voltage divider circuit. When the temperature changes, the resistance of the thermistor RT changes. Assuming that the thermistor RT has a positive temperature coefficient, its resistance will increase as the greenhouse ambient temperature increases and decrease as the temperature decreases.

[0075] In this implementation, transistor Q4 operates in amplification mode. The higher the temperature of the greenhouse environment, the larger the resistance of the thermistor RT, the smaller the voltage drop across resistor R9, and the smaller the base voltage of transistor Q4. Consequently, the current flowing through the emitter of transistor Q4 decreases, and the voltage across resistor R10 decreases.

[0076] The emitter of transistor Q4 is connected to the input terminals of both the high-temperature and low-temperature comparison modules. The voltage across resistor R10 serves as the output signal for the temperature detection module. This voltage signal reflects the temperature information of the greenhouse environment. The high-temperature and low-temperature comparison modules compare this signal with their respective set reference voltages to determine whether the greenhouse temperature is too high or too low, and then output corresponding control signals to adjust the greenhouse temperature.

[0077] As can be seen from the above, the temperature detection module converts the temperature changes in the greenhouse environment into electrical signals through the characteristics of the thermistor and the signal processing function of the transistor, thus providing a foundation for subsequent temperature control.

[0078] like Figure 3 As shown, in one embodiment of this disclosure, a reference module is also included;

[0079] The reference module is configured to provide a reference voltage to the high-temperature comparison module and the low-temperature comparison module;

[0080] The reference module includes: rheostat RP3, resistor R11, and resistor R12;

[0081] The high-temperature comparison module includes operational amplifier A2; the low-temperature comparison module includes operational amplifier A3.

[0082] The first terminal of the variable resistor RP3 is connected to the VCC power supply. The second terminal of the variable resistor RP3 is connected to the first terminal of the resistor R12 through the resistor R11. The second terminal of the variable resistor RP3 is connected to the inverting input terminal of the operational amplifier A2. The second terminal of the resistor R11 is connected to the non-inverting input terminal of the operational amplifier A3. The second terminal of the resistor R11 is grounded through the resistor R12. The non-inverting input terminal of the operational amplifier A2 and the inverting input terminal of the operational amplifier A3 are both connected to the output terminal of the temperature detection module.

[0083] The output of operational amplifier A2 is connected to the control terminal of the ventilation control module, and the output of operational amplifier A3 is connected to the control terminal of the heating control module.

[0084] In this implementation, the second terminal of the variable resistor RP3 is connected to the inverting input terminal of operational amplifier A2 (high-temperature comparator module), providing a high-temperature reference voltage for operational amplifier A2. By adjusting the resistance value of the variable resistor RP3, the voltage at the inverting input terminal of operational amplifier A2 can be changed, thereby setting the high-temperature threshold. The second terminal of resistor R11 is connected to the non-inverting input terminal of operational amplifier A3 (low-temperature comparator module), and is grounded through resistor R12, providing a low-temperature reference voltage for operational amplifier A3. By changing the resistance ratio of resistors R11 and R12, the voltage at the non-inverting input terminal of operational amplifier A3 can be adjusted, thereby setting the low-temperature threshold.

[0085] The non-inverting input of operational amplifier A2 is connected to the output of the temperature detection module to receive a voltage signal reflecting the actual temperature of the greenhouse. Its inverting input is connected to the second terminal of the variable resistor RP3 in the reference module to receive a high-temperature reference voltage. When the voltage signal corresponding to the actual greenhouse temperature (voltage at the non-inverting input of operational amplifier A2) is higher than the high-temperature reference voltage (voltage at the inverting input of operational amplifier A2), it indicates that the greenhouse temperature is too high. At this time, operational amplifier A2 outputs a high-level signal to the control terminal of the ventilation control module. Upon receiving this high-level signal, the ventilation control module controls the ventilation equipment to turn on, thereby reducing the temperature inside the greenhouse. When the voltage signal corresponding to the actual greenhouse temperature is lower than the high-temperature reference voltage, operational amplifier A2 outputs a low-level signal, the ventilation control module does not activate, and the ventilation equipment remains off.

[0086] The low-temperature comparison module is composed of operational amplifier A3. The inverting input of operational amplifier A3 is connected to the output of the temperature detection module, receiving a voltage signal reflecting the actual temperature of the greenhouse; the non-inverting input is connected to the second terminal of resistor R11 in the reference module, receiving the low-temperature reference voltage. When the voltage signal corresponding to the actual greenhouse temperature (voltage at the inverting input of operational amplifier A3) is lower than the low-temperature reference voltage (voltage at the non-inverting input of operational amplifier A3), it indicates that the greenhouse temperature is too low. At this time, operational amplifier A3 outputs a high-level signal to the control terminal of the heating control module. Upon receiving this high-level signal, the heating control module controls the heating equipment to turn on, raising the temperature inside the greenhouse. When the voltage signal corresponding to the actual greenhouse temperature is higher than the low-temperature reference voltage, operational amplifier A3 outputs a low-level signal, the heating control module does not operate, and the heating equipment remains off.

[0087] As can be seen from the above, this embodiment provides different reference voltages through the reference module, and compares the actual temperature signal with the reference voltage through the high temperature comparison module and the low temperature comparison module. It can automatically determine whether the greenhouse temperature is too high or too low, and control the operation of the ventilation equipment or heating equipment accordingly, thereby achieving effective regulation of the greenhouse temperature.

[0088] like Figure 3 As shown, in one embodiment of this disclosure, the ventilation control module includes a switching tube Q5; the heating control module includes a switching tube Q6.

[0089] The control terminal of the switching transistor Q5 is connected to the output terminal of the high temperature comparator module, the first terminal of the switching transistor Q5 is connected to the VDD power supply, and the second terminal of the switching transistor Q5 is connected to the power supply terminal of the ventilation equipment.

[0090] The control terminal of the switching transistor Q6 is connected to the output terminal of the low-temperature comparator module, the first terminal of the switching transistor Q6 is connected to the VDD power supply, and the second terminal of the switching transistor Q6 is connected to the power supply terminal of the heating equipment.

[0091] In this implementation, when the high-temperature comparison module detects that the actual temperature of the greenhouse is higher than the set high-temperature threshold, operational amplifier A2 outputs a high-level signal to the control terminal of switching transistor Q5. Driven by the high-level signal, switching transistor Q5 conducts, and the VDD power supply powers the ventilation equipment through the conducting switching transistor Q5. The ventilation equipment then starts operating, reducing the temperature inside the greenhouse through ventilation. When the actual temperature of the greenhouse is lower than or equal to the set high-temperature threshold, operational amplifier A2 outputs a low-level signal to the control terminal of switching transistor Q5. Under the influence of the low-level signal, switching transistor Q5 is turned off, disconnecting the ventilation equipment from the VDD power supply, and the ventilation equipment stops working.

[0092] When the low-temperature comparison module detects that the actual temperature of the greenhouse is lower than the set low-temperature threshold, operational amplifier A3 outputs a high-level signal to the control terminal of switching transistor Q6. Driven by the high-level signal, switching transistor Q6 conducts, and the VDD power supply powers the heating equipment through the conducting switching transistor Q6, causing the heating equipment to start working and raising the temperature inside the greenhouse. When the actual temperature of the greenhouse is higher than or equal to the set low-temperature threshold, operational amplifier A3 outputs a low-level signal to the control terminal of switching transistor Q6. Under the action of the low-level signal, switching transistor Q6 is turned off, disconnecting the heating equipment from the VDD power supply, and the heating equipment stops operating.

[0093] like Figure 3 As shown, in one embodiment of this disclosure, it further includes: a greenhouse gas cycle control module;

[0094] The greenhouse gas cycle control module includes: OR gate U4 and switching transistor Q7;

[0095] The first input terminal of OR gate U4 is connected to the output terminal of operational amplifier A2, the second input terminal of OR gate U4 is connected to the output terminal of operational amplifier A3, the output terminal of OR gate U4 is connected to the control terminal of switch transistor Q7, the first terminal of switch transistor Q7 is connected to VDD power supply, and the second terminal of switch transistor Q7 is connected to greenhouse gas circulation equipment.

[0096] In this implementation, when the high-temperature comparison module detects that the actual greenhouse temperature is higher than the set high-temperature threshold, operational amplifier A2 outputs a high-level signal. This high-level signal is input to the first input of OR gate U4. According to the logic characteristics of the OR gate, regardless of whether the signal output by operational amplifier A3 is high or low, the output of OR gate U4 will output a high-level signal. This high-level signal is sent to the control terminal of switch Q7, turning on switch Q7. After switch Q7 is turned on, the VDD power supply powers the greenhouse gas circulation equipment through it, and the greenhouse gas circulation equipment starts operating. At this time, while the ventilation equipment lowers the greenhouse temperature, the operation of the greenhouse gas circulation equipment can improve the circulation of indoor air, making the temperature more evenly distributed and avoiding localized excessively high or low temperatures.

[0097] When the low-temperature comparison module detects that the actual temperature of the greenhouse is lower than the set low-temperature threshold, operational amplifier A3 outputs a high-level signal. This high-level signal is input to the second input of OR gate U4. Similarly, according to the logic characteristics of the OR gate, the output of OR gate U4 outputs a high-level signal to the control terminal of switch Q7, turning on switch Q7. The VDD power supply powers the greenhouse gas circulation equipment, and the equipment begins operation. During the process of the heating equipment raising the greenhouse temperature, the greenhouse gas circulation equipment promotes the even diffusion of heat within the greenhouse, ensuring a uniform temperature throughout the entire greenhouse environment.

[0098] As can be seen from the above, the greenhouse gas circulation control module performs logical operations on the output signals of the high temperature comparison module and the low temperature comparison module through an OR gate, controls the conduction and cutoff of the switching tube, and thus realizes intelligent control of the greenhouse gas circulation equipment, ensuring that the internal ambient temperature can be kept uniform when the greenhouse is heated or ventilated.

[0099] like Figure 4 As shown, in one embodiment of this disclosure, it further includes: a carbon dioxide detection module, a carbon dioxide comparison module, and an OR gate U5;

[0100] The output of the carbon dioxide detection module is connected to the main control module, the output of the carbon dioxide detection module is connected to the input of the carbon dioxide comparison module, the output of the carbon dioxide comparison module is connected to the first input of OR gate U5, the second input of OR gate U5 is connected to the output of the high temperature comparison module, and the output of OR gate U5 is connected to the control terminal of the ventilation control module.

[0101] In this implementation, the carbon dioxide detection module is responsible for real-time detection of the carbon dioxide content in the greenhouse, and converts the detected carbon dioxide content information into an electrical signal to be transmitted to the main control module, while also transmitting the signal to the input terminal of the carbon dioxide comparison module.

[0102] After receiving the signal from the carbon dioxide detection module, the carbon dioxide comparison module compares the signal with a preset carbon dioxide content reference value. If the detected carbon dioxide content is higher than the preset reference value, it indicates that the carbon dioxide content in the greenhouse is too high. In this case, the carbon dioxide comparison module outputs a high-level signal to the first input of the OR gate U5. If the detected carbon dioxide content is lower than or equal to the preset reference value, the carbon dioxide comparison module outputs a low-level signal.

[0103] The high-temperature comparison module compares the voltage signal output by the temperature detection module, which reflects the actual temperature of the greenhouse, with the set high-temperature reference voltage signal. When the voltage signal corresponding to the actual greenhouse temperature is higher than the high-temperature reference voltage signal, it indicates that the greenhouse temperature is too high, and the high-temperature comparison module outputs a high-level signal to the second input of the OR gate U5; when the voltage signal corresponding to the actual greenhouse temperature is lower than or equal to the high-temperature reference voltage signal, the high-temperature comparison module outputs a low-level signal.

[0104] If the carbon dioxide comparison module outputs a high level (carbon dioxide content is too high), OR gate U5 will output a high level regardless of the output signal of the high temperature comparison module. If the high temperature comparison module outputs a high level (greenhouse temperature is too high), OR gate U5 will output a high level regardless of the output signal of the carbon dioxide comparison module. When OR gate U5 outputs a high-level signal, the ventilation control module receives the signal and controls the ventilation equipment to turn on, thereby reducing the temperature or carbon dioxide content in the greenhouse and regulating the greenhouse environment. When OR gate U5 outputs a low-level signal, the ventilation control module does not operate, and the ventilation equipment remains off.

[0105] As can be seen from the above, this embodiment, through the coordinated operation of the carbon dioxide detection module, carbon dioxide comparison module, high temperature comparison module, and OR gate U5, can intelligently control the operation of ventilation equipment according to changes in temperature and carbon dioxide content in the greenhouse environment, ensuring that the greenhouse environment is in a state suitable for crop growth.

[0106] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A greenhouse environment monitoring system, characterized in that, include: Light intensity detection module, dimming module, temperature detection module, high temperature comparison module, low temperature comparison module, heating control module, ventilation control module, main control module, and alarm module; The output terminals of the light intensity detection module, the temperature detection module, and the alarm module are all connected to the main control module. The light intensity detection module is configured to detect the light intensity of the greenhouse, and the temperature detection module is configured to detect the temperature of the greenhouse. The control terminal of the dimming module is connected to the output terminal of the light intensity detection module; The input terminals of both the high-temperature comparison module and the low-temperature comparison module are connected to the output terminal of the temperature detection module. The output terminal of the high-temperature comparison module is connected to the control terminal of the ventilation control module, and the output terminal of the low-temperature comparison module is connected to the control terminal of the heating control module. The first ends of both the high-temperature comparison module and the low-temperature comparison module are connected to a power source. The second end of the high-temperature comparison module is connected to the power supply of the heating device, and the second end of the low-temperature comparison module is connected to the power supply of the ventilation device.

2. The greenhouse environment monitoring system as described in claim 1, characterized in that, Also includes: Communication module; The main control module communicates with the monitoring platform through the communication module.

3. The greenhouse environment monitoring system as described in claim 1, characterized in that, The light intensity detection module includes: a variable resistor RP1, a variable resistor RP2, a first photoresistor U1, a resistor R3, a Zener diode D1, and an operational amplifier A1; The first terminal of the variable resistor RP1 is connected to the VCC power supply, and the second terminal of the variable resistor RP1 is grounded through the photoresistor U1. The first terminal of the variable resistor RP2 is connected to the VCC power supply, and the second terminal of the variable resistor RP2 is grounded through the resistor R3. The inverting input terminal of the operational amplifier A1 is connected to the second terminal of the variable resistor RP1, and the non-inverting input terminal of the operational amplifier A1 is connected to the second terminal of the variable resistor RP2. The cathode of the Zener diode D1 is connected to the non-inverting input terminal of the operational amplifier A1, and the anode of the Zener diode D1 is grounded. The output terminal of the operational amplifier A1 is connected to the control terminal of the dimming module.

4. The greenhouse environment monitoring system as described in claim 1, characterized in that, The dimming module includes: a switching transistor Q1, a timer U2, a resistor R1, a second photoresistor U3, a capacitor C3, a transistor Q3, a resistor R7, a transistor Q2, and a fill light H1; The control terminal of the switching transistor Q1 is connected to the output terminal of the light intensity detection module. The first terminal of the switching transistor Q1 is connected to the VEE power supply. The second terminal of the switching transistor Q1 is connected to the power supply terminal of the timer U2. The power supply terminal of the timer U2 is connected to the discharge terminal of the timer U2 through the resistor R1. The discharge terminal of the timer U2 is connected to the low trigger terminal of the timer U2 through the second photoresistor U3. The low trigger terminal of the timer U2 is connected to the high trigger terminal of the timer U2. The low trigger terminal of the second photoresistor U3 is grounded through the capacitor C3. The output terminal of the timer U2 is connected to the base of the transistor Q3. The collector of transistor Q3 is connected to the VEE power supply, the emitter of transistor Q3 is grounded through the resistor R7, the emitter of transistor Q3 is connected to the base of transistor Q2, the collector of transistor Q2 is connected to the VDD power supply, the emitter of transistor Q2 is connected to the first terminal of the fill light H1, and the second terminal of the fill light H1 is grounded.

5. A greenhouse environment monitoring system as described in claim 1, characterized in that, The temperature detection module includes: a thermistor RT, a resistor R9, a transistor Q4, and a resistor R10; The first terminal of the thermistor RT is connected to the VCC power supply, the second terminal of the thermistor RT is connected to the base of the transistor Q4, the second terminal of the thermistor RT is grounded through the resistor R9, the collector of the transistor Q4 is connected to the VCC power supply, the emitter of the transistor Q4 is grounded through the resistor R10, and the emitter of the transistor Q4 is connected to the input terminals of the high temperature comparison module and the low temperature comparison module respectively.

6. The greenhouse environment monitoring system as described in claim 1, characterized in that, Also includes: Reference module; The reference module is configured to provide a reference voltage to the high-temperature comparison module and the low-temperature comparison module; The reference module includes: a variable resistor RP3, a resistor R11, and a resistor R12; The high-temperature comparison module includes operational amplifier A2; the low-temperature comparison module includes operational amplifier A3. The first terminal of the variable resistor RP3 is connected to the VCC power supply. The second terminal of the variable resistor RP3 is connected to the first terminal of the resistor R12 through the resistor R11. The second terminal of the variable resistor RP3 is connected to the inverting input terminal of the operational amplifier A2. The second terminal of the resistor R11 is connected to the non-inverting input terminal of the operational amplifier A3. The second terminal of the resistor R11 is grounded through the resistor R12. The non-inverting input terminal of the operational amplifier A2 and the inverting input terminal of the operational amplifier A3 are both connected to the output terminal of the temperature detection module. The output terminal of operational amplifier A2 is connected to the control terminal of the ventilation control module, and the output terminal of operational amplifier A3 is connected to the control terminal of the heating control module.

7. A greenhouse environment monitoring system as described in claim 1, characterized in that, The ventilation control module includes a switching tube Q5; the heating control module includes a switching tube Q6. The control terminal of the switching transistor Q5 is connected to the output terminal of the high temperature comparison module, the first terminal of the switching transistor Q5 is connected to the VDD power supply, and the second terminal of the switching transistor Q5 is connected to the power supply terminal of the ventilation equipment. The control terminal of the switching transistor Q6 is connected to the output terminal of the low-temperature comparator module, the first terminal of the switching transistor Q6 is connected to the VDD power supply, and the second terminal of the switching transistor Q6 is connected to the power supply terminal of the heating device.

8. A greenhouse environment monitoring system as described in claim 6, characterized in that, Also includes: Greenhouse gas cycle control module; The greenhouse gas circulation control module includes: an OR gate U4 and a switching tube Q7; The first input terminal of the OR gate U4 is connected to the output terminal of the operational amplifier A2, the second input terminal of the OR gate U4 is connected to the output terminal of the operational amplifier A3, the output terminal of the OR gate U4 is connected to the control terminal of the switching transistor Q7, the first terminal of the switching transistor Q7 is connected to the VDD power supply, and the second terminal of the switching transistor Q7 is connected to the greenhouse gas circulation device.

9. A greenhouse environment monitoring system as described in claim 1, characterized in that, Also includes: Carbon dioxide detection module, carbon dioxide comparison module, and OR gate U5; The output terminal of the carbon dioxide detection module is connected to the main control module, the output terminal of the carbon dioxide detection module is connected to the input terminal of the carbon dioxide comparison module, the output terminal of the carbon dioxide comparison module is connected to the first input terminal of the OR gate U5, the second input terminal of the OR gate U5 is connected to the output terminal of the high temperature comparison module, and the output terminal of the OR gate U5 is connected to the control terminal of the ventilation control module.

Images