Agricultural field remote monitoring device

Abstract

The utility model relates to the technical field of agricultural information management, in particular to an agricultural field remote monitoring device, which comprises an acquisition module, a processing module, a communication module and an execution module, and is characterized in that the processing module is respectively connected with the acquisition module, the communication module and the execution module; the processing module comprises a preprocessing module and a processor, and the acquisition module is connected with the processor through the preprocessing module; the preprocessing module comprises a judgment module and a transmission module, and the judgment module, the transmission module and the acquisition module are mutually connected in pairs; the transmission module comprises an isolation module, a switch module and an amplification module, and the isolation module, the switch module and the amplification module are connected in sequence; and the isolation module and the switch module are respectively connected to different ports of the judgment module. The agricultural field remote monitoring device solves the technical problems that an existing agricultural field remote monitoring device cannot prevent faults of an acquisition module, and consequently wrong data processing and execution misleading are caused.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural information management, in particular to an agricultural field remote monitoring device. Background Art

[0002] Agricultural field remote monitoring devices are core tools for modern smart agriculture. Integrating sensor networks, communication technologies, and data processing and analysis, they can accurately monitor farmland environmental parameters (such as soil moisture, temperature, and light intensity) around the clock, providing a scientific basis for agricultural production through data analysis. Workers can view real-time farmland conditions through remote terminals and control operations such as irrigation and fertilization. Simultaneously, an alarm module can promptly detect and address potential problems. The application of these devices has improved agricultural production efficiency, reduced costs, enhanced crop quality, and enhanced disaster resilience. Existing agricultural field remote monitoring devices suffer from unstable data transmission. They rely on wired connections, which are susceptible to interference and interruptions during data transmission, resulting in data loss or delays. Some agricultural field remote monitoring devices also have data storage capabilities, storing collected information. However, these devices require workers to physically visit monitoring points to download the stored data, which not only increases labor costs but also reduces the efficiency and timeliness of data acquisition. Therefore, addressing the data instability and inefficiency inherent in agricultural field remote monitoring devices is of vital importance.

[0003] The Chinese utility model patent with the name of "A Smart Agricultural Remote Monitoring Device" and publication number CN205450843U has been published. This patent includes a power supply unit, a data acquisition unit, a data transmission processing unit, an execution unit, and a terminal. This utility model realizes efficient data transmission and long-term cloud storage through the close coordination of each unit module and wireless data transmission technology. The utility model can push data to the terminal in a timely manner, improving the problem of traditional agricultural monitoring devices relying on wired transmission and inconvenient data storage. However, the continuous work of the data acquisition unit to collect data can easily lead to abnormalities in the data acquisition unit. If the processor fails to discover and notify the staff in time, it may cause the faulty data to be directly involved in the processing, which not only affects the normal operation of the processor, but also may mislead the execution module to receive and execute incorrect instructions based on the faulty data, thereby causing a series of unnecessary erroneous operations. Utility Model Content

[0004] The purpose of this application is to provide an agricultural field remote monitoring device, which solves the technical problem that the existing agricultural field remote monitoring device cannot prevent acquisition module failure, thereby leading to erroneous data processing and misleading execution.

[0005] In order to solve the above technical problems, the solution adopted by this application is as follows:

[0006] The utility model provides an agricultural field remote monitoring device, comprising an acquisition module, a processing module, a communication module, and an execution module, wherein the processing module is connected to the acquisition module, the communication module, and the execution module respectively; the device is characterized in that: the processing module comprises a preprocessing module and a processor, and the acquisition module is connected to the processor via the preprocessing module; the preprocessing module comprises a judgment module and a transmission module, and the judgment module, the transmission module, and the acquisition module are interconnected in pairs;

[0007] The transmission module is used to include an isolation module, a switch module, and an amplification module, and the isolation module, the switch module, and the amplification module are connected in sequence; the isolation module and the switch module are respectively connected to different ports of the judgment module;

[0008] The transmission module is used to amplify, filter and transmit the data transmitted by the acquisition module;

[0009] The isolation module is used to isolate the input end and the switch module and filter the received data signal;

[0010] The switch module is used to control the conduction state of the transmission module;

[0011] The amplification module is used to amplify the data in the transmission module;

[0012] The judgment module is used to judge whether the data transmitted by the acquisition module is within a normal output range, and the judgment module controls the switch module to be turned off or on according to the judgment result.

[0013] In some embodiments, the switch module includes a field effect transistor, the gate of the field effect transistor is connected to the output end of the judgment module, the source of the field effect transistor is connected to the output end of the isolation module, and the drain of the field effect transistor is connected to the amplification module.

[0014] In some embodiments, the isolation module includes a voltage follower and a filter circuit, the input end of the voltage follower is connected to the input end of the judgment module, and the output end of the voltage follower is connected to the source of the field effect tube through the filter circuit.

[0015] In some embodiments, the amplification module includes multiple resistors and transistors, the drain of the field-effect transistor is connected to the base of the transistor through a resistor, the emitter of the transistor is grounded through a resistor, and a control output end is set at the connection between the emitter of the transistor and the resistor; the collector of the transistor is connected to the power supply through a resistor, and a data output end is set at the connection between the collector of the transistor and the resistor.

[0016] In some embodiments, the judgment module includes a comparison module and a control output module. The input end of the comparison module is set as the input end of the non-judgment module, the output end of the comparison module is connected to the control output module, and the output end of the control output module serves as the output end of the judgment module.

[0017] In some embodiments, the control output module includes a transistor and multiple resistors, the output end of the judgment module is connected to the base of the transistor through a resistor, the emitter of the transistor is grounded through a resistor, and the collector of the transistor is connected to the power supply through a resistor.

[0018] In some embodiments, an alarm module is further included. After receiving a signal from a pre-processing module connected thereto, the alarm module transmits an alarm signal to a processor connected thereto.

[0019] In some embodiments, the alarm module includes a transistor, a photoelectric sensor, and multiple resistors. The base of the transistor is set as the input end of the alarm module. The collector of the transistor, pin 1 of the photoelectric sensor, and pin 4 of the photoelectric sensor are connected and connected to a power supply. The emitter of the transistor and pin 2 of the photoelectric sensor are connected and connected to a ground. Pin 3 of the photoelectric sensor is grounded through a resistor, and the connection between pin 3 of the photoelectric sensor and the resistor is set as an output end for outputting an alarm signal.

[0020] When the transistor is turned on, the photoelectric sensor loses power and stops sending an alarm signal to the processor; when the transistor is turned off, the photoelectric sensor receives power and sends an alarm signal to the processor.

[0021] In some embodiments, the pre-processing module further includes a bias device, and the acquisition module is connected to the pre-processing module via the bias device.

[0022] In some embodiments, the processor model is STM32L151CBT6A.

[0023] The technical solution of this application has at least the following advantages and beneficial effects:

[0024] The present invention is provided with a pre-processing module, which can effectively prevent the problem of erroneous data processing and misleading execution caused by failure of the acquisition module. The pre-processing module includes a judgment module and a transmission module. In the process of data being transmitted from the acquisition module to the processor, the transmission module can amplify, filter and other processing on the data to ensure data quality; at the same time, the judgment module judges whether the data transmitted by the acquisition module is within the normal output range based on the received data. Once an abnormality is found, the transmission module is immediately cut off to prevent the transmission module from transmitting faulty data to prevent the erroneous instructions from affecting the execution module, thereby avoiding unnecessary erroneous operations; while shutting down the transmission module, the pre-processing module also sends an alarm signal to the processor through the alarm module, and the processor responds quickly to notify the staff to carry out maintenance, thereby effectively avoiding the adverse effects of long-term abnormality of the acquisition module on the stability of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a signal flow diagram of the present utility model;

[0026] Figure 2 This is the circuit diagram of the preprocessing module of the utility model;

[0027] Figure 3 This is the circuit diagram of the alarm module of the present utility model;

[0028] Figure 4 This is the circuit diagram of the temperature acquisition module of the present utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. Terms such as "center," "upper," "lower," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the figures, or the positions or locations in which the product is typically placed when in use. These terms are used solely for ease of description and simplification of the present application. They do not indicate or imply that the device or component referred to must have a specific position, be constructed, or operate in a specific orientation, and are not to be construed as limiting the present application. It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "mounted," and "connected" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections or indirect connections through an intermediary; or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application in specific contexts.

[0031] Example 1

[0032] Please refer to Figures 1-4 The utility model provides an agricultural field remote monitoring device, which is the same as the existing technology and includes a collection module, a processing module, a communication module, and an execution module. The processing module is connected to the collection module, the communication module, and the execution module respectively;

[0033] The acquisition module transmits the collected environmental data to the processing module, which amplifies and filters the data before making a judgment. If the processing module determines that the current data exceeds a preset reference threshold, the processing module sends a signal to the execution module, and the execution module performs relevant operations according to the signal instructions until the environmental data remains within a normal range. If the processing module determines that the current data does not exceed the preset reference threshold, the processing module does not send a signal to the execution module.

[0034] After receiving the environmental data, the processing module sends the data to the monitoring end through the communication module, making it easier for staff to view the field environmental data.

[0035] It should be noted that the acquisition module includes but is not limited to temperature sensors, humidity sensors, carbon dioxide sensors, and light intensity sensors; the execution module includes but is not limited to temperature control equipment, dehumidification equipment, and irrigation systems;

[0036] To understand the working principle of the acquisition module, we will take the temperature sensor as an example.

[0037] like Figure 4As shown, the temperature sensor includes a thermistor U1, a transistor Q1, resistors R1, R2, R3, R4, and a capacitor C1;

[0038] Specifically, one end of the resistor R1 and one end of the resistor R2 are connected to a power supply, the other end of the resistor R2, one end of the resistor R3, and one end of the thermistor U1 are connected, the other end of the resistor R3, one end of the capacitor C1, and the base of the transistor Q1 are connected; the collector of the transistor Q1 and the other end of the resistor R1 are connected; the emitter of the transistor Q1 and one end of the resistor R4 are connected, and the S_OUT output end is set here; the other end of the thermistor U1, the other end of the capacitor C1, and the other end of the resistor R4 are connected and grounded.

[0039] It should be noted that the S_OUT output terminal is used to transmit environmental data and is connected to the processing module.

[0040] It should be explained that the circuit structures of humidity sensors, carbon dioxide sensors, and light intensity sensors are similar to those of temperature sensors. The only differences are: the temperature detection module uses a thermistor to convert the temperature signal into an electrical signal; the humidity sensor uses a hysteresistor to convert the humidity signal into an electrical signal; the carbon dioxide sensor uses a gas resistor to convert the carbon dioxide concentration signal into an electrical signal; and the light intensity sensor uses a photoresistor to convert the light signal into an electrical signal.

[0041] It should be noted that, in this embodiment, the model of the communication module is SIM300C.

[0042] Different from the existing technology, the processing module includes a preprocessing module and a processor, and the acquisition module is connected to the processor through the preprocessing module; the preprocessing module includes a judgment module and a transmission module, and the judgment module, transmission module, and acquisition module are interconnected in pairs;

[0043] It should be noted that, in this embodiment, the processor model is STM32L151CBT6A.

[0044] The transmission module is used to amplify and filter the data transmitted by the acquisition module. It includes an isolation module, a switch module, and an amplification module. The isolation module, the switch module, and the amplification module are connected in sequence; the isolation module and the switch module are respectively connected to different ports of the judgment module;

[0045] The switch module is used to control the conduction state of the transmission module, and includes a field effect transistor, the gate of the field effect transistor is connected to the output end of the judgment module, the source of the field effect transistor is connected to the output end of the isolation module, and the drain of the field effect transistor is connected to the amplification module;

[0046] The isolation module is used to isolate the input end and the switch module to prevent electrical interference and noise between the two, and to filter the received data signal. It includes a voltage follower and a filter circuit. The input end of the voltage follower is connected to the input end of the judgment module, and the output end of the voltage follower is connected to the source of the field effect transistor through the filter circuit.

[0047] The amplification module is used to amplify the data being transmitted. It includes multiple resistors and transistors. The drain of the field-effect transistor is connected to the base of the transistor through a resistor, the emitter of the transistor is grounded through a resistor, and a control output end is set at the connection between the emitter of the transistor and the resistor; the collector of the transistor is connected to the power supply through a resistor, and a data output end is set at the connection between the collector of the transistor and the resistor.

[0048] The judgment module is used to judge whether the data transmitted by the acquisition module is within the normal output range. It includes a comparison module and a control output module. The input end of the comparison module is set to the input end of the judgment module, the output end of the comparison module is connected to the control output module, and the output end of the control output module serves as the output end of the judgment module;

[0049] The control output module includes a transistor and multiple resistors. The output end of the judgment module is connected to the base of the transistor through the resistor, the emitter of the transistor is grounded through the resistor, and the collector of the transistor is connected to the power supply through the resistor.

[0050] The pre-processing module also includes a bias device, which adds a bias voltage to the data received from the acquisition module to ensure the normal operation of subsequent circuits; the acquisition module is connected to the pre-processing module through the bias device.

[0051] It should be noted that there is a one-to-one correspondence between the pre-processing module and the sensors in the acquisition module, that is, one sensor matches one pre-processing module.

[0052] Further, if Figure 2 As shown, the pre-processing module includes an operational amplifier U2, comparators U3 and U4, a voltage follower U5, a field effect transistor Q3, capacitors C2 and C3, diodes D1 and D2, an indicator LED1, transistors Q2 and Q3, and resistors R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, and R20;

[0053] Among them, the bias device includes an operational amplifier U2, resistors R5, R6, R7, and R8; the comparison module includes comparators U3 and U4, resistors R9, R10, R11, and R12, and diodes D1 and D2; the control output module includes an indicator LED1, a capacitor C2, a transistor Q2, and resistors R13, R14, and R15; the filter circuit includes a resistor R20 and a capacitor C3; the amplification module includes a transistor Q3, and resistors R17, R18, and R19;

[0054] Specifically, one end of the resistor R5 is set as the IN input terminal, the other end of the resistor R5, one end of the resistor R6, and the pin 3 of the operational amplifier U2 are connected, and the pin 2 of the operational amplifier U2 and the other end of the resistor R6 are connected and connected to the power supply; the pin 4 of the operational amplifier U2, one end of the resistor R7, and one end of the resistor R8 are connected, and the pin 5 of the operational amplifier U2 and the other end of the resistor R7 are connected and grounded; the other end of the resistor R8, the pin 3 of the voltage follower U5, the pin 1 of the operational amplifier U2, the pin 3 of the comparator U3, and the pin 2 of the comparator U4 are connected; the pin 4 of the comparator U3 is connected to the power supply, Pin 5 is grounded, pin 2 of comparator U3, one end of resistor R9, and one end of resistor R10 are connected, the other end of resistor R9 is connected to the power supply, the other end of resistor R10 is grounded, and pin 1 of comparator U3 is connected to the positive electrode of diode D1; pin 5 of comparator U4 is grounded, pin 3 of comparator U4, one end of resistor R11, and one end of resistor R12 are connected, the other end of resistor R11 is grounded, the other end of resistor R12, pin 2 of voltage follower U5, and pin 4 of comparator U4 are connected and grounded, and pin 1 of comparator U4 is connected to the positive electrode of diode D2; the negative electrode of diode D1, diode The cathode of D2, one end of the resistor R13, and one end of the resistor R14 are connected, the other end of the resistor R13, one end of the capacitor C2, and the base of the transistor Q2 are connected, the emitter of the transistor Q2, the other end of the resistor R14, and the other end of the capacitor C2 are connected and grounded, the collector of the transistor Q2, the cathode of the indicator LED1, one end of the resistor R15, and the gate of the field effect transistor Q3 are connected, the anode of the indicator LED1 and the other end of the resistor R15 are connected and connected to the power supply; pin 5 of the voltage follower U5 is grounded, pin 4 of the voltage follower U5, pin 1 of the voltage follower U5, one end of the capacitor C3, One end of the resistor R20 is connected to the source of the field effect transistor Q3, the other end of the capacitor C3 is connected to the other end of the resistor R20 and is grounded, the drain of the field effect transistor Q3 is connected to one end of the resistor R16, the other end of the resistor R16, one end of the resistor R18, and the base of the transistor Q3 are connected, the collector of the transistor Q3 is connected to one end of the resistor R17 and the OUT1 output terminal is set there, and the other end of the resistor R17 is connected to the power supply; the emitter of the transistor Q3 is connected to one end of the resistor R19 and the OUT2 output terminal is set there, the other end of the resistor R18 is connected to the other end of the resistor R19 and is grounded.

[0055] It should be noted that the field effect transistor Q3 is a PMOS tube.

[0056] It should be noted that the IN input terminal is connected to the output terminal of the acquisition module, and the OUT2 output terminal is connected to the input terminal of the processor.

[0057] The utility model further comprises an alarm module, which transmits an alarm signal to a processor connected thereto after receiving a signal from the pre-processing module connected thereto;

[0058] The alarm module includes a transistor, a photoelectric sensor, and multiple resistors. The base of the transistor is set as the input end of the alarm module. The collector of the transistor, pin 1 of the photoelectric sensor, and pin 4 of the photoelectric sensor are connected and connected to the power supply. The emitter of the transistor and pin 2 of the photoelectric sensor are connected and connected to the ground. Pin 3 of the photoelectric sensor is grounded through a resistor, and the connection between pin 3 of the photoelectric sensor and the resistor is set as an output end for outputting an alarm signal.

[0059] When the transistor is turned on, the photoelectric sensor loses power and stops sending alarm signals to the processor; when the transistor is turned off, the photoelectric sensor receives power and sends alarm signals to the processor.

[0060] Further, if Figure 3 As shown, the alarm module includes a photoelectric sensor U6, a transistor Q4, a resistor R22, a resistor R23, a resistor R24, and a resistor R25;

[0061] Specifically, one end of the resistor R21 is set as the CON_IN input end, the other end of the resistor R21 is connected to the base of the transistor Q4, the collector of the transistor Q4, one end of the resistor R22, and pin 1 of the photoelectric sensor U6 are connected, the other end of the resistor R22 is connected to one end of the resistor R24 ​​and connected to the power supply, the other end of the resistor R24 ​​is connected to pin 4 of the photoelectric sensor U6, pin 3 of the photoelectric sensor U6 is connected to one end of the resistor R25 and the CON_OUT output end is set here; pin 2 of the photoelectric sensor U6 is connected to one end of the resistor R23, the emitter of the transistor Q4, the other end of the resistor R23, and the other end of the resistor R25 are connected and grounded.

[0062] It should be noted that the model of photoelectric sensor U6 is HT-3H7-ATP1;

[0063] It should be noted that the CON_IN input terminal is connected to the OUT1 output terminal, and the CON_OUT output terminal is connected to the processor.

[0064] It should be noted that the filter circuit is not only used for filtering, but also for pressure relief. When the judgment module determines that the data is abnormal, the switch module closes the signal transmission channel, and the filter circuit relieves the voltage signal remaining in the system that has not been transmitted to ensure the stability of the device.

[0065] It should be noted that, in this embodiment, all transistors are NPN transistors.

[0066] In traditional agricultural field remote monitoring devices, the acquisition module takes a long time to collect data. If the acquisition module fails and causes abnormal signal transmission, it will not only affect the normal operation of the processor, but may also mislead the execution module based on the faulty data to receive and execute incorrect instructions, thereby causing a series of unnecessary erroneous operations.

[0067] In response to the shortcomings of traditional agricultural field remote monitoring devices, the processing module of the present invention includes a preprocessing module and a processor. The processor is used to determine whether the collected data is normal data, that is, whether the data transmitted by the collection module under normal working conditions exceeds a reference threshold; the preprocessing module is used to determine whether the data is fault data, that is, whether the collection module transmits data under abnormal working conditions, and decides whether to output the data transmitted by the collection module to the processor for further processing based on the judgment result. The specific method is as follows:

[0068] The pre-processing module detects the data and determines whether the sensor is working properly. If it is determined to be working properly, the switch module is turned on and the collected data is transmitted to the processor through the transmission module.

[0069] If it is determined that the operation is abnormal, the switch module will be cut off, and the collected data cannot be transmitted to the processor through the transmission module. The preprocessing module will send an alarm signal to the processor through the alarm module. The processor will respond quickly and notify the staff to carry out maintenance, thereby effectively avoiding the adverse effects of long-term abnormality of the acquisition module on the stability of the entire device.

[0070] Thus far, various embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details known in the art have been omitted. Based on the above description, those skilled in the art will fully understand how to implement the technical solutions of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A remote monitoring device for agricultural fields, comprising a collection module, a processing module, a communication module, and an execution module, wherein the processing module is connected to the collection module, the communication module, and the execution module respectively; characterized in that: The processing module includes a preprocessing module and a processor, and the acquisition module is connected to the processor through the preprocessing module; the preprocessing module includes a judgment module and a transmission module, and the judgment module, the transmission module, and the acquisition module are interconnected in pairs; The transmission module is used to include an isolation module, a switch module, and an amplification module, and the isolation module, the switch module, and the amplification module are connected in sequence; the isolation module and the switch module are respectively connected to different ports of the judgment module; The transmission module is used to amplify, filter and transmit the data transmitted by the acquisition module; The isolation module is used to isolate the input end and the switch module and filter the received data signal; The switch module is used to control the conduction state of the transmission module; The amplification module is used to amplify the data in the transmission module; The judgment module is used to judge whether the data transmitted by the acquisition module is within a normal output range, and the judgment module controls the switch module to be turned off or on according to the judgment result.

2. The agricultural field remote monitoring device according to claim 1, characterized in that: The switch module includes a field effect tube, a gate of the field effect tube is connected to the output end of the judgment module, a source of the field effect tube is connected to the output end of the isolation module, and a drain of the field effect tube is connected to the amplification module.

3. The agricultural field remote monitoring device according to claim 2, characterized in that: The isolation module includes a voltage follower and a filter circuit. The input end of the voltage follower is connected to the input end of the judgment module. The output end of the voltage follower is connected to the source of the field effect tube through the filter circuit.

4. The agricultural field remote monitoring device according to claim 2, characterized in that: The amplification module includes multiple resistors and transistors. The drain of the field-effect transistor is connected to the base of the transistor through a resistor, the emitter of the transistor is grounded through a resistor, and a control output end is set at the connection between the emitter of the transistor and the resistor; the collector of the transistor is connected to the power supply through a resistor, and a data output end is set at the connection between the collector of the transistor and the resistor.

5. The agricultural field remote monitoring device according to claim 2, characterized in that: The judgment module includes a comparison module and a control output module. The input end of the comparison module is set as the input end of the non-judgment module. The output end of the comparison module is connected to the control output module. The output end of the control output module serves as the output end of the judgment module.

6. The agricultural field remote monitoring device according to claim 5, characterized in that: The control output module includes a transistor and multiple resistors. The output end of the judgment module is connected to the base of the transistor through a resistor. The emitter of the transistor is grounded through a resistor. The collector of the transistor is connected to a power supply through a resistor.

7. The agricultural field remote monitoring device according to claim 1, characterized in that: It also includes an alarm module, which transmits an alarm signal to a processor connected to it after receiving a signal from the pre-processing module connected to it.

8. The agricultural field remote monitoring device according to claim 7, characterized in that: The alarm module includes a transistor, a photoelectric sensor, and multiple resistors. The base of the transistor is set as the input end of the alarm module. The collector of the transistor, pin 1 of the photoelectric sensor, and pin 4 of the photoelectric sensor are connected and connected to a power supply. The emitter of the transistor and pin 2 of the photoelectric sensor are connected and connected to the ground. Pin 3 of the photoelectric sensor is grounded through a resistor, and the connection between pin 3 of the photoelectric sensor and the resistor is set as an output end for outputting an alarm signal. When the transistor is turned on, the photoelectric sensor loses power and stops sending an alarm signal to the processor; when the transistor is turned off, the photoelectric sensor receives power and sends an alarm signal to the processor.

9. The agricultural field remote monitoring device according to claim 1, characterized in that: The pre-processing module further includes a bias device, and the acquisition module is connected to the pre-processing module via the bias device.

10. The agricultural field remote monitoring device according to claim 1, characterized in that: The processor model is STM32L151CBT6A.

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