Device exhaust fan wireless monitoring device and method

Abstract

The invention provides an equipment exhaust fan wireless monitoring device and method. The device comprises an airflow wind power receiving part, a motor, a signal processing device, a power supply and a wireless transmitting device which are arranged on the airflow exhaust side of an exhaust fan of a to-be-monitored device, and a wireless receiving device arranged on a monitoring terminal, the airflow wind power receiving part captures airflow and drives rotation; the motor is coaxially connected with the airflow and wind power receiving part and converts rotating mechanical energy into an electric signal; the power supply is used for supplying power to the signal processing equipment and the wireless transmitting equipment; the signal processing equipment comprises a cascade amplification circuit and a microcontroller, the amplification circuit is used for amplifying an electric signal, the microcontroller is used for converting the amplified electric signal into a digital signal and triggering the wireless transmitting equipment to transmit the digital signal to the wireless receiving equipment, and the wireless receiving equipment transmits the digital signal to the wireless transmitting equipment when the digital signal is smaller than or equal to a preset threshold value. And generating an early warning signal and executing a corresponding early warning action. The device provided by the invention has the advantage of low cost.

Description

Technical Field

[0001] The present application relates to the technical field of exhaust fan monitoring, and particularly to a wireless monitoring device and method for equipment exhaust fans. Background Art

[0002] In modern processing and production enterprises, the normal operation of equipment exhaust fans is crucial for ensuring the stability and efficiency of equipment. However, due to differences in detection and alarm methods among equipment of different brands, it is difficult to achieve unified centralized management. Traditional monitoring technologies usually require complex installation processes, additional power support, and external circuits, which not only increase costs but also raise the difficulty of maintenance.

[0003] Existing wireless monitoring methods for equipment exhaust fans include wired connection and wireless monitoring. Among them, the wired connection method directly connects sensors to the monitoring system and transmits the operating status of the equipment exhaust fan through wired means. In the wireless monitoring method, wireless sensors (such as vibration sensors, temperature sensors, etc.) monitor the status of the equipment exhaust fan. Due to the limitation of battery life, the signal strength of existing wireless sensors is weak, and the wireless transmission distance can only reach about 120 meters in an open environment. The above monitoring methods often require complex wiring work, increasing installation costs and time consumption. At the same time, additional power modules and complex external circuits are also required.

[0004] Therefore, the prior art has technical problems such as difficulty in achieving centralized monitoring and high installation costs. Summary of the Invention

[0005] Embodiments of the present application provide a wireless monitoring device and method for equipment exhaust fans to solve the problems in the prior art, namely, difficulty in achieving centralized monitoring and high installation costs.

[0006] In a first aspect, the present application provides a wireless monitoring device for equipment exhaust fans, including: an air flow wind receiving component disposed on the air flow discharge side of the equipment exhaust fan to be monitored, a motor, a signal processing device, a power supply, a wireless transmission device, and a wireless receiving device disposed on the monitoring terminal;

[0007] The air flow wind receiving component is used to capture the air flow and drive rotation, and a shaft hole is provided in the central area of the air flow wind receiving component;

[0008] The motor is coaxially connected to the air flow wind receiving component, and is matched with the output shaft of the motor through the shaft hole to convert rotational mechanical energy into an electrical signal;

[0009] The power supply is used to supply power to the signal processing device and the wireless transmission device;

[0010] The signal processing device includes a cascaded amplifier circuit and a microcontroller. The cascaded amplifier circuit is used to amplify the electrical signal, and the microcontroller is used to convert the amplified electrical signal into a digital signal and trigger the wireless transmission device to send the digital signal to the wireless receiving device. When the digital signal is less than or equal to a preset threshold, the wireless receiving device generates a warning signal and performs a corresponding warning action.

[0011] Optionally, the cascaded amplifier circuit includes a series-connected inverting amplifier circuit and a non-inverting amplifier circuit;

[0012] Wherein, the first end of the inverting amplifier circuit is connected to the first end of the motor, the second end of the inverting amplifier circuit is connected to the first end of the non-inverting amplifier circuit, and the second end of the non-inverting amplifier circuit is connected to the first pin of the microcontroller;

[0013] During the process of the air flow and wind receiving component reversely driving the motor to rotate, the electrical signal is negative, the voltage value at the first end of the inverting amplifier circuit is less than the voltage value at the third end of the inverting amplifier circuit, the third end of the inverting amplifier circuit is connected to the power supply, the inverting amplifier circuit is used to invert and amplify the electrical signal, and the second end of the inverting amplifier circuit outputs the amplified electrical signal;

[0014] During the process of the air flow and wind receiving component forwardly driving the motor to rotate, the electrical signal is positive, the electrical signal is transmitted to the first end of the non-inverting amplifier circuit through a part of the structure of the inverting amplifier circuit, the voltage value at the first end of the non-inverting amplifier circuit is less than the voltage value at the third end of the non-inverting amplifier circuit, the non-inverting amplifier circuit is used to forwardly amplify the electrical signal, and the second end of the non-inverting amplifier circuit outputs the amplified electrical signal.

[0015] Optionally, the inverting amplifier circuit includes: a first resistor, a second resistor, an inverting amplifier, a first diode and a first capacitor;

[0016] The first end of the first resistor is the first end of the inverting amplifier circuit, the second end of the first resistor is connected to the third end of the inverting amplifier, the second end of the first resistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the cathode of the first diode;

[0017] The first terminal of the inverting amplifier is grounded, the second terminal of the inverting amplifier is grounded, the positive electrode of the first diode is connected to the fourth terminal of the inverting amplifier, the negative electrode of the first diode is the second terminal of the inverting amplifier circuit, the fifth terminal of the inverting amplifier is the third terminal of the inverting amplifier circuit, the fifth terminal of the inverting amplifier is connected to one end of the first capacitor, the other end of the first capacitor is connected to the second terminal of the inverting amplifier, and the other end of the second capacitor is grounded.

[0018] Optionally, the non-inverting amplifier circuit includes: a non-inverting amplifier, a third resistor, a fourth resistor, and a second capacitor;

[0019] The first terminal of the non-inverting amplifier is the first terminal of the non-inverting amplifier circuit, the second terminal of the non-inverting amplifier is grounded, the third terminal of the non-inverting amplifier is connected to the first terminal of the third resistor, the second terminal of the third resistor is grounded, the fourth terminal of the non-inverting amplifier is the second terminal of the non-inverting amplifier circuit, the fifth terminal of the non-inverting amplifier is the third terminal of the non-inverting amplifier circuit, and the fifth terminal of the non-inverting amplifier is grounded through the second capacitor.

[0020] Optionally, when the microcontroller triggers the wireless sending device to send the digital signal to the wireless receiving device, it also triggers the wireless sending device to send the identifier of the exhaust fan of the device to be monitored to the wireless receiving device;

[0021] The wireless receiving device includes a wireless receiving module, a data processing module, and a warning device connected in sequence;

[0022] After the data processing device obtains the identifier of the exhaust fan of the device to be monitored through the wireless receiving module, based on the identifier of the exhaust fan of the device to be monitored, it searches for a preset threshold corresponding to the identifier, and determines whether the digital signal is less than or equal to the preset threshold. When the digital signal is less than or equal to the preset threshold, it generates a warning signal and sends the warning signal to the warning device, so that the warning device performs a corresponding warning action based on the warning signal.

[0023] Optionally, the wireless monitoring device for the exhaust fan of the device further includes an adsorption device and a housing;

[0024] The signal processing device, the power supply, and the wireless sending device are located inside the housing, and the adsorption device is located at the bottom of the housing to fix the wireless monitoring device for the exhaust fan of the device on the surface of the device to be monitored.

[0025] Optionally, the wireless monitoring device for the equipment exhaust fan further includes a power supply substrate. The power supply is a button battery made of manganese steel. The button battery is fixed on the power supply substrate through a fixing member, and the power supply substrate is fixed inside the housing.

[0026] Optionally, the adsorption device includes a permanent magnet, and the permanent magnet fixes the wireless monitoring device for the equipment exhaust fan on the surface of the device to be monitored by magnetic attraction.

[0027] Optionally, the air flow and wind force receiving component is a four - blade windmill fan blade, and the blade plane of the four - blade windmill fan blade is perpendicular to the air flow direction to maximize the capture of air flow power.

[0028] In a second aspect, the present application provides a method for wirelessly monitoring an equipment exhaust fan, which is applied to the wireless monitoring device for the equipment exhaust fan in the first aspect, and includes:

[0029] After the air flow and wind force receiving component captures the air flow and drives rotation, the motor converts the rotational mechanical energy into an electrical signal;

[0030] The electrical signal is amplified through an amplifier circuit, the amplified electrical signal is converted into a digital signal by a microcontroller, and the wireless transmission device is triggered to send the digital signal to the wireless receiving device;

[0031] When the digital signal is less than or equal to a preset threshold, a warning signal is generated through the wireless receiving device and corresponding warning actions are executed.

[0032] In an embodiment of the present application, a wireless monitoring device for an equipment exhaust fan is provided. The wireless monitoring device for the equipment exhaust fan includes: an air flow and wind force receiving component arranged on the air flow discharge side of the equipment exhaust fan to be monitored, a motor, a signal processing device, a power supply, and a wireless transmission device, and a wireless receiving device arranged at a monitoring terminal; the air flow and wind force receiving component is used to capture the air flow and drive rotation, and a shaft hole is provided in the central area of the air flow and wind force receiving component; the motor is coaxially connected to the air flow and wind force receiving component, and is matched with the output shaft of the motor through the shaft hole to convert the rotational mechanical energy into an electrical signal; the power supply is used to supply power to the signal processing device and the wireless transmission device; the signal processing device includes a cascaded amplifier circuit and a microcontroller. The amplifier circuit is used to amplify the electrical signal, and the microcontroller is used to convert the amplified electrical signal into a digital signal and trigger the wireless transmission device to send the digital signal to the wireless receiving device. When the digital signal is less than or equal to a preset threshold, the wireless receiving device generates a warning signal and executes corresponding warning actions.

[0033] The embodiments of the present application utilize the principle of wind power generation. The airflow of the exhaust fan of the device to be monitored is used to drive the rotation of the airflow wind receiving component, enabling the motor to output a stable and reliable electrical signal. The amplitude of this signal is proportional to the rotational speed of the airflow wind receiving component, thereby reflecting the working state and efficiency of the exhaust fan of the device to be monitored. This method has its own power supply and does not require an additional power supply module, reducing the installation complexity. The present application realizes the wireless communication function under low power consumption through a wireless transmitting device and a wireless receiving device. Each device exhaust fan wireless monitoring device and the exhaust fan of the device to be monitored can have a unique number, enhancing the identification accuracy and anti-interference ability, and being suitable for large-scale deployment. Further, the embodiments of the present application can introduce a low-power working mode design, optimize the power management through a trigger wake-up mechanism, ensure that the device can be conveniently installed and operate stably and reliably, and reduce the energy consumption and operation and maintenance costs. In summary, the present application provides a highly integrated, self-powered, and easy-to-install device exhaust fan wireless monitoring device, which solves the problems such as short signal transmission distance and complex installation in the prior art, and greatly improves the intelligent level of the management of the device to be monitored and the production stability.

[0034] These aspects or other aspects of the present application will be more clearly understood in the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 It is a schematic structural diagram of a device exhaust fan wireless monitoring device provided by the embodiments of the present application;

[0037] Figure 2 It is a schematic structural diagram of a four-blade windmill blade provided by the embodiments of the present application;

[0038] Figure 3 It is a schematic structural diagram of a motor provided by the embodiments of the present application;

[0039] Figure 4 It is a schematic structural diagram of a cascade amplifier circuit provided by the embodiments of the present application;

[0040] Figure 5 It is a schematic structural diagram of another device exhaust fan wireless monitoring device provided by the embodiments of the present application;

[0041] Figure 6Schematic flowchart of a method for wireless monitoring of a device exhaust fan provided by an embodiment of the present application;

[0042] Figure 7 Schematic flowchart of another method for wireless monitoring of a device exhaust fan provided by an embodiment of the present application. Detailed implementation manners

[0043] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0044] In some processes described in the specification, claims and above-mentioned drawings of the present application, a plurality of operations appear in a specific order. However, it should be clearly understood that these operations may not be executed in the order in which they appear in this document or may be executed in parallel. The operation numbers such as 11 and 12 are only used to distinguish different operations, and the numbers themselves do not represent any execution order. In addition, these processes may include more or fewer operations, and these operations may be executed in sequence or in parallel. It should be noted that the descriptions such as "first" and "second" in this document are used to distinguish different messages, devices, modules, etc., do not represent a sequence, and do not limit that "first" and "second" are of different types.

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0046] Figure 1 Flowchart of a device for wireless monitoring of a device exhaust fan provided by an embodiment of the present application, as Figure 1 shown, the device includes: an air flow wind receiving component 11 disposed on the air flow discharge side of the device exhaust fan to be monitored, a motor 12, a signal processing device 13, a power supply 14, a wireless transmission device 15, and a wireless receiving device 16 disposed on the monitoring terminal.

[0047] The functions of each device are described as follows: The airflow and wind force receiving component 11 is used to capture the airflow and drive rotation. A shaft hole is provided in the central area of the airflow and wind force receiving component 11; the motor 12 is coaxially connected to the airflow and wind force receiving component 11 and is matched with the output shaft of the motor 12 through the shaft hole to convert the rotational mechanical energy into an electrical signal; the power supply 14 is used to supply power to the signal processing device 13 and the wireless transmission device 15; the signal processing device 13 includes a cascaded amplifier circuit 131 and a microcontroller 132. The cascaded amplifier circuit 131 is used to amplify the electrical signal, and the microcontroller 132 is used to convert the amplified electrical signal into a digital signal and trigger the wireless transmission device 15 to send the digital signal to the wireless receiving device 16. When the digital signal is less than or equal to a preset threshold, the wireless receiving device 16 generates a warning signal and performs a corresponding warning action.

[0048] Among them, both the wireless transmission device 15 and the wireless receiving device 16 can include a wireless communication module with a bandwidth of 2.4G and a capacitor. The size is 19*12*2mm, and the operating frequency is 2400MHz. The wireless transmission device 15.

[0049] In the embodiment of the present application, the air flow and wind power receiving component 11 (such as a four - blade windmill fan blade) captures the air flow discharged by the equipment exhaust fan and drives it to rotate. The motor 12 is coaxially connected to this component and can effectively convert the captured air flow kinetic energy into a stable electrical signal output. This design enables the generation of detectable electrical signals even under low - wind - speed conditions, improving the sensitivity and accuracy of monitoring. The cascade amplification circuit is used to amplify the weak electrical signal converted from mechanical energy, ensuring that the intensity of the electrical signal is sufficient for subsequent processing. The microcontroller further converts the amplified analog electrical signal into a digital signal and determines whether to trigger an early warning according to the preset logic. Such a design ensures the accuracy and reliability of signal processing and reduces the possibility of false alarms. The wireless transmission device 15 can, under the trigger of the microcontroller, transmit the digital signal containing the equipment status information to the remote wireless receiving device 16. This wireless communication method eliminates the complex wiring problem in traditional wired monitoring systems, supports more flexible and convenient installation and deployment, and simultaneously realizes the centralized management and monitoring of multiple devices. When the received digital signal is lower than or equal to the preset threshold, the wireless receiving device 16 can automatically identify the abnormal situation and immediately generate an early warning signal to perform the corresponding early warning action. This feature helps to promptly detect abnormal operation of the exhaust fan, prevent equipment overheating damage caused by poor heat dissipation, and ensure the safe and stable operation of the equipment. Due to the self - powered design (assuming that the power supply 14 is based on the principle of wind power generation or other forms of self - powered mechanisms), and highly integrated hardware components, this monitoring device reduces the dependence on external power supplies and other complex external circuits, simplifies the installation process, reduces the maintenance cost and difficulty, and improves the economy and practicality of the overall system. In summary, this equipment exhaust fan wireless monitoring device not only realizes the precise monitoring of the working state of the exhaust fan, but also provides a convenient remote monitoring solution through wireless technology, effectively improving the efficiency of equipment management and maintenance.

[0050] As a possible embodiment, as Figure 2 shown, the air flow and wind power receiving component 11 is a four - blade windmill fan blade 111, and the blade plane of the four - blade windmill fan blade 111 is perpendicular to the air flow direction to maximize the capture of air flow power.

[0051] It should be understood that the four - blade windmill fan blade 111 can be simply referred to as the fan blade. Since the central region of the air flow and wind power receiving component 11 is provided with a shaft hole, and the air flow and wind power receiving component 11 is a four - blade windmill fan blade 111, there is a shaft hole 112 in the central region of the four - blade windmill fan blade 111.

[0052] Exemplarily, in the embodiment of the present application, a four - blade windmill blade 111 with a diameter of 100 mm and a pore diameter of 2 mm is used as the air - flow and wind - force receiving component 11. The length of a single blade in the four - blade windmill blade 111 is 44 mm. This blade design can effectively capture and respond to air - flow changes. At the same time, a motor 12 with a diameter of 24 mm, a height of 9 mm, a shaft diameter of 2 mm, and a shaft length of 4.7 mm is selected as the conversion component of the sensing signal. The wire length of the motor 12 can be set to 70 mm. The motor 12 has the characteristics of a compact structure and high conversion efficiency. During the assembly process, the 2 - mm pore diameter of the blade is precisely matched with the 2 - mm shaft diameter of the motor 12 to ensure that the blade can drive the motor 12 to rotate smoothly and efficiently. When the blade encounters an air - flow perpendicular to the blade plane, the blade will rotate around the motor axis, thereby driving the motor 12 to rotate together. Inside the motor 12, according to the principle of force generating magnetism and magnetism generating electricity, a DC voltage signal is generated on the motor coil cable. Through experimental testing, when the blade rotates at a speed of not less than 100 revolutions per minute, the voltage signal output at both ends of the motor 12 is stable and greater than or equal to 50 mV. This conversion process realizes the efficient and accurate conversion of air - flow power into a quantifiable electrical signal output. Through the above - mentioned design and technical means, the embodiment of the present application successfully converts air - flow into an electrical signal, providing a solid foundation for subsequent signal processing and analysis.

[0053] As Figure 3 shown, the outer diameter of the output shaft 121 of the motor is the same as Figure 2 the inner diameter of the central shaft hole 112.

[0054] As a possible embodiment, the cascaded amplifier circuit includes a series - connected inverting amplifier circuit and a non - inverting amplifier circuit; wherein, the first end of the inverting amplifier circuit is connected to the first end of the motor 12, the second end of the inverting amplifier circuit is connected to the first end of the non - inverting amplifier circuit, and the second end of the non - inverting amplifier circuit is connected to the first pin of the microcontroller.

[0055] During the process of the air - flow and wind - force receiving component 11 driving the motor 12 to rotate reversely, the electrical signal is negative, the voltage value at the first end of the inverting amplifier circuit is less than the voltage value at the third end of the inverting amplifier circuit. The third end of the inverting amplifier circuit is connected to the power supply 14. The inverting amplifier circuit is used to invert - amplify the electrical signal, and the second end of the inverting amplifier circuit outputs the amplified electrical signal. Or, during the process of the air - flow and wind - force receiving component 11 driving the motor 12 to rotate forward, the electrical signal is positive. The electrical signal is transmitted to the first end of the non - inverting amplifier circuit through a part of the structure of the inverting amplifier circuit. The voltage value at the first end of the non - inverting amplifier circuit is less than the voltage value at the third end of the non - inverting amplifier circuit. The non - inverting amplifier circuit is used to non - invert - amplify the electrical signal, and the second end of the non - inverting amplifier circuit outputs the amplified electrical signal.

[0056] Embodiments of the present application have the ability to process bidirectional electrical signals. By designing a cascaded amplifier circuit including an inverting amplifier circuit and a non-inverting amplifier circuit, it can effectively process electrical signals in both positive and negative directions from the motor 12. When a negative electrical signal generated by the reverse drive of the motor 12 by the air flow receiving component 11 can be amplified by the inverting amplifier circuit; while when a positive electrical signal is generated by its forward drive of the motor 12, the non-inverting amplifier circuit is responsible for amplification. This design ensures that no matter how the fan blades rotate (whether due to changes in the air flow direction or the characteristics of the device itself), the corresponding electrical signals can be accurately captured and amplified, improving the adaptability and reliability of the system. Moreover, the inverting amplifier circuit and the non-inverting amplifier circuit each amplify specific types of electrical signals (negative or positive), which can effectively increase the amplitude of the original weak electrical signal, making it more suitable for subsequent digital conversion and analysis processes. This not only enhances the readability of the signal but also improves the stability and accuracy of the entire monitoring system. Due to the circuit design that specifically amplifies electrical signals of different polarities, the system can more accurately distinguish and quantify different operating states of the fan (such as normal operation, reverse rotation, or abnormal stoppage, etc.). Such a design helps to improve the accuracy of judging the actual operating state of the exhaust fan, thereby triggering the warning mechanism more timely and accurately to prevent the occurrence of potential failures. Combining the inverting amplifier circuit and the non-inverting amplifier circuit in a cascaded manner can effectively amplify bidirectional electrical signals without significantly increasing the circuit complexity. This method not only ensures the functional integrity of the circuit but also helps to save space and cost, making the overall design scheme more compact and efficient. Therefore, the cascaded amplifier circuit design including the inverting amplifier circuit and the non-inverting amplifier circuit greatly improves the overall performance of the exhaust fan wireless monitoring device of the equipment through its bidirectional signal processing ability and precise amplification function of electrical signals, especially outstanding in signal capture, amplification, and final state judgment, providing support for real-time monitoring and maintenance.

[0057] Further, as Figure 4 shown, the inverting amplifier circuit 311 in the cascaded amplifier circuit includes: a first resistor R1, a second resistor R2, an inverting amplifier U1, a first diode D1, and a first capacitor C1.

[0058] The first end of the first resistor R1 is the first end of the inverting amplifier circuit. The second end of the first resistor R1 is connected to the third end of the inverting amplifier U1. The second end of the first resistor R1 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is connected to the cathode of the first diode D1. The first end of the inverting amplifier U1 is grounded, the second end of the inverting amplifier U1 is grounded, the anode of the first diode D1 is connected to the fourth end of the inverting amplifier U1. The cathode of the first diode D1 is the second end of the inverting amplifier circuit. The fifth end of the inverting amplifier U1 is the third end of the inverting amplifier circuit. The fifth end of the inverting amplifier U1 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is connected to the second end of the inverting amplifier U1 and the other end of the first capacitor C1 is grounded.

[0059] It should be understood that in the embodiment of the present application, a first diode D1 with a conduction voltage drop of 0.6V can be respectively arranged in the inverting amplifier circuit as a single-phase conduction valve for the subsequent inverting amplifier and non-inverting amplifier, which can effectively ensure that the negative signal output when the positive signal is input to the inverting amplifier will not interfere with the subsequent circuit.

[0060] Exemplarily, in the embodiment of the present application, the amplification factor can be set by the parameter values of two resistors, the first resistor R1 and the second resistor R2. The calculation formula is: amplification factor Nr = R2 / R1. When R2 is 1K and R1 is 100K, the amplification factor is 100 times. One end of the motor coil is connected to the input end of the inverting amplifier, and the other end of the motor coil is connected to the reference ground. The output end of the inverting amplifier is connected to the anode of the unidirectional isolation diode D1. When the fan blade rotates in the reverse direction, the signal output by the motor 12 is negative. The negative signal can be inverted and amplified by the inverting amplifier circuit to output a positive value, so that the first diode D1 conducts and the output signal has a voltage drop of 0.6V. The first capacitor C1 can be a ceramic capacitor.

[0061] In the embodiment of the present application, when the air flow and wind force receiving component 11 reversely drives the motor 12 to rotate, the generated negative electrical signal is processed by the inverting amplifier circuit. Due to the design of the inverting amplifier U1, it can convert this negative signal into a positive value and amplify it, so that the microcontroller can read and process these signals more accurately. By reasonably selecting the resistance values of the first resistor R1 and the second resistor R2, the amplification factor can be adjusted to ensure the stability and linearity of the output signal. This helps to improve the accuracy of the entire monitoring system, so that consistent performance can be maintained even under different working conditions. The first diode D1 is connected between the fourth terminal (usually the output terminal) of the inverting amplifier U1 and the second resistor R2, providing a protection mechanism. If an abnormal high voltage situation occurs, the diode can conduct quickly to prevent subsequent circuit components from being damaged by excessive voltage, ensuring the safe operation of the system. The first capacitor C1 is connected between the fifth terminal of the inverting amplifier U1 (which can refer to the power supply 14 or the reference voltage terminal) and the ground, acting as a bypass capacitor, which can filter out high-frequency noise, purify the power supply, and ensure the stability of the inverting amplifier U1. Both ends of the first capacitor C1 are connected to the first terminal of the inverting amplifier U1 and other positions respectively to achieve the filtering function. The component selection and layout in this circuit design help to enhance the electromagnetic interference resistance of the entire system. Especially in an industrial environment where there are a large number of electrical devices and possible electromagnetic interference sources, such a design can effectively reduce the influence of external factors on signal acquisition and ensure the accuracy and reliability of data transmission. In summary, through its specific component configuration and connection method, this inverting amplifier circuit not only realizes the effective amplification and inversion processing of the input signal, but also provides necessary protection measures and filtering functions, improving the overall stability and accuracy of the system, and enabling efficient and reliable monitoring of the exhaust fan status.

[0062] Further, as Figure 4 shown, the non-inverting amplifier circuit 312 in the cascaded amplifier circuit includes: a non-inverting amplifier U2, a third resistor R3, a fourth resistor R4, and a second capacitor C2. The first terminal of the non-inverting amplifier U2 is the first terminal of the non-inverting amplifier circuit, the second terminal of the non-inverting amplifier U2 is grounded, the third terminal of the non-inverting amplifier U2 is connected to the first terminal of the third resistor R3, the second terminal of the third resistor R3 is grounded, the fourth terminal of the non-inverting amplifier U2 is the second terminal of the non-inverting amplifier circuit, the fifth terminal of the non-inverting amplifier U2 is the third terminal of the non-inverting amplifier circuit, and the fifth terminal of the non-inverting amplifier U2 is grounded through the second capacitor C2.

[0063] Exemplarily, in the embodiment of the present application, the amplification factor is set by the resistance parameter values of two resistors, namely the third resistor R3 and the fourth resistor R4. The calculation formula is: amplification factor Nt = (R4 + R3) / R3. If the value of the fourth resistor R4 is 1K and the value of the third resistor R3 is 100K, the amplification factor is approximately 100 times at this time. The non-inverting amplifier input terminal is connected to the negative electrode of the first diode D1 and the feedback resistor of the inverting amplifier (i.e., the second resistor R2), and the non-inverting amplifier output terminal is connected to the first pin of the microcontroller. When the fan blade rotates forward, the signal output by the motor 12 is positive. The electrical signal is input to the non-inverting amplifier circuit through the feedback resistor of the inverting amplifier, and the non-inverting amplifier amplifies and outputs the electrical signal, so that it can be stably, reliably and effectively read by other pins of the microcontroller. If the fan blade rotates reversely, the negative electrode of the first diode D1 conducts, and a voltage signal of 2.4V will be given to the input terminal of the non-inverting amplifier (the output of the inverting amplifier is 3V, and the forward voltage drop of the diode is 0.6V, so it is 2.4V here). After being amplified by the non-inverting amplifier, this electrical signal can stably and reliably output a 3V signal to the microcontroller for reading operation. In the embodiment of the present application, each capacitor can be a chip bypass decoupling capacitor.

[0064] In the embodiment of the present application, the non-inverting amplifier U2 is used to amplify the input electrical signal in phase. When the airflow and wind force receiving component 11 drives the motor 12 to rotate forward, the generated positive electrical signal is processed by the non-inverting amplifier circuit. Due to the design of the non-inverting amplifier U2, it can directly amplify this positive signal without changing its polarity, ensuring that the original direction of the signal remains unchanged, which is convenient for the subsequent microcontroller to accurately read and process. The selection of the third resistor R3 and the fourth resistor R4 determines the gain (i.e., amplification factor) of the non-inverting amplifier circuit. By precisely selecting the resistance values of these two resistors, the amplification factor can be controlled to adapt to the requirements of different application scenarios. In addition, this configuration helps to maintain the stability and linearity of the output signal, and can maintain consistent performance even when the input signal strength changes. The second capacitor C2 is connected between the fifth terminal of the non-inverting amplifier U2 and the ground, acting as a bypass capacitor, which can effectively filter out high-frequency noise, purify the power supply, and ensure the stability of the operation of the non-inverting amplifier U2. This helps to reduce the influence of external electromagnetic interference on the signal, and improves the anti-interference ability and signal quality of the entire monitoring system. One characteristic of the non-inverting amplifier U2 is its high input impedance. Therefore, its influence on the load of the previous-stage circuit is very small, and it hardly draws current from the input source. Therefore, it can more truly reflect the state of the input signal and avoid signal distortion caused by the load effect. By using the non-inverting amplifier U2 and its simple peripheral components (such as resistors and capacitors), not only the effective amplification of the signal is achieved, but also the circuit design is simplified, the potential failure points are reduced, and the reliability and durability of the system are improved. In summary, this non-inverting amplifier circuit realizes the effective amplification of the input signal through its specific component configuration and connection method, and keeps the original polarity of the signal unchanged. At the same time, it provides the necessary filtering function, enhances the anti-interference ability of the system, simplifies the design and improves the overall stability and reliability, which is crucial for realizing efficient and reliable exhaust fan status monitoring. Such a design enables accurate capture and amplification of the electrical signal output from the motor 12 under both forward and reverse driving conditions, laying a solid foundation for subsequent signal processing and warning mechanisms.

[0065] Further, as Figure 5 shown, another device, the exhaust fan wireless monitoring device, further includes: a voltage stabilizing circuit located between the two-stage amplifier circuit and the microcontroller, and this voltage stabilizing circuit includes a second diode D2 and a fifth resistor R5. In the embodiment of the present application, the current of the second diode D2 can be controlled by connecting the fifth resistor R5 in series, so as to maintain a relatively stable voltage level. The second diode D2 can be a Zener diode.

[0066] Further, as Figure 5As shown, another wireless monitoring device for a device exhaust fan further includes a third capacitor C3, a sixth resistor R6, and another controller JP2, and the microcontroller JP1 is connected to the another controller JP2. The motor 12 is connected to one end of the first resistor R1.

[0067] Further, when the microcontroller JP1 triggers the wireless sending device 15 to send a digital signal to the wireless receiving device 16, it also triggers the wireless sending device 15 to send the identifier of the device exhaust fan to be monitored to the wireless receiving device 16; the wireless receiving device 16 includes a wireless receiving module, a data processing module, and an early warning device connected in sequence; after the data processing device obtains the identifier of the device exhaust fan to be monitored through the wireless receiving module, based on the identifier of the device exhaust fan to be monitored, it searches for a preset threshold corresponding to the identifier, and determines whether the digital signal is less than or equal to the preset threshold. When the digital signal is less than or equal to the preset threshold, it generates an early warning signal and sends the early warning signal to the early warning device, so that the early warning device performs corresponding early warning actions based on the early warning signal.

[0068] Exemplarily, the wireless receiving device 16 can be powered by 5V using a type-c interface; and uses a 3.6-inch two-digit common-anode digital tube as the display window of the receiving circuit for displaying the received alarm information number; uses a 5V buzzer as the early warning device; uses two tactile buttons for querying the sending / receiving data of the wireless receiving device 16; any model of chip can be used in this application to enable data communication between the wireless receiving device 16 and the computer terminal; the wireless receiving device 16 in the embodiment of this application may also include a wireless communication module with a bandwidth of 2.4G. The core processor of the wireless receiving device 16 is used to control the reception and transmission of wireless communication module information, to control the display of the content of the two-digit common-anode digital tube, to control the alarm and stop of the 5V buzzer, to control the information input of the tactile buttons, and to control the reliable operation of the control logic of the entire wireless receiving device 16.

[0069] In the embodiment of the present application, the microcontroller JP1 not only triggers the wireless transmission device 15 to transmit the monitored digital signal (representing the working state of the exhaust fan), but also simultaneously transmits the unique identifier of the exhaust fan, the device to be monitored. Therefore, the status information of each exhaust fan can be accurately identified and classified, ensuring that the data between different devices will not be confused. This design is particularly applicable to large-scale monitoring systems with multiple exhaust fans of the same or different types. Through the identifier, the status of each exhaust fan can be clearly distinguished, improving the management efficiency. After receiving the exhaust fan identifier, the data processing module can look up the corresponding preset threshold according to the identifier. Different exhaust fans may require different working thresholds due to their installation locations, usage environments, or performance parameters. This personalized threshold setting enables the system to more accurately determine whether each exhaust fan is in a normal working state. For example, in a high-demand industrial environment, the exhaust fans in some critical areas may require more stringent operating standards; while in other non-critical areas, relatively loose standards can be adopted. When the digital signal is less than or equal to the preset threshold, it indicates that the exhaust fan may have a fault or is about to have a fault (for example, too low a rotation speed may lead to insufficient heat dissipation). At this time, the data processing module will generate a warning signal and send it to the warning device. The warning device will perform corresponding actions according to the received warning signal, such as emitting a sound alarm, lighting a warning light, sending a text message notification, etc., to timely remind the maintenance personnel to conduct inspections and repairs, and avoid serious consequences such as equipment overheating caused by exhaust fan failures. Due to the adoption of the personalized threshold setting method based on identifiers, the entire system has high flexibility and scalability. The newly added exhaust fan can be easily added to the monitoring network by simply assigning a unique identifier and setting the corresponding threshold, without making major adjustments to the existing system architecture. As the requirements change, the embodiment of the present application can also conveniently adjust the threshold settings of each exhaust fan to further optimize the system performance. In summary, by the microcontroller JP1 transmitting the exhaust fan identifier and the corresponding digital signal, combined with the data processing logic of the wireless receiving device 16, the precise monitoring and intelligent warning of the status of each exhaust fan are realized. This method not only improves the accuracy and reliability of the monitoring system, but also enhances the flexibility and maintainability of the system.

[0070] Furthermore, the wireless monitoring device for the exhaust fan further includes an adsorption device and a housing; the signal processing device 13, the power supply 14, and the wireless transmission device 15 are located inside the housing, and the adsorption device is located at the bottom of the housing to fix the wireless monitoring device for the exhaust fan on the surface of the device to be monitored.

[0071] Specifically, the adsorption device includes a permanent magnet, and the permanent magnet fixes the wireless monitoring device for the exhaust fan on the surface of the device to be monitored by magnetic attraction.

[0072] Using a permanent magnet as an adsorption device, the wireless monitoring device can be very conveniently fixed directly on the metal surface of the device to be monitored. There is no need for drilling, screw fixing or other complex installation steps, which greatly simplifies the installation process and reduces the installation time and cost. This simple installation method is very suitable for application scenarios that require frequent replacement or adjustment of the monitoring position, improving the flexibility and adaptability of the system. The strong magnetic attraction provided by the permanent magnet can ensure that the monitoring device is firmly attached to its installation position and will not easily fall off even in the case of vibration or slight collision. This ensures the stable operation of the device in various industrial environments and reduces the risk of measurement errors or equipment damage caused by accidental movement. For some special environments (such as workplaces with harsh conditions such as vibration and shock), this design is particularly important because it enhances the reliability and durability of the overall device.

[0073] The design of the outer shell not only provides physical protection for the signal processing device 13, the power supply 14 and the wireless transmission device 15, preventing them from being affected by external dust, moisture and other possible damage factors, but also can play a certain electromagnetic shielding role, reducing the influence of external electromagnetic interference on the internal circuit, thereby improving the accuracy and stability of data transmission. In addition, the outer shell can be customized according to actual needs, such as selecting corrosion-resistant materials or materials with waterproof and dustproof functions to meet the requirements of different working environments. The integrated design makes the occupied space of the entire monitoring device smaller, facilitating integration into the existing equipment layout without affecting the operation or maintenance of other components. The compact design also helps to reduce wind resistance, which is particularly important for those monitoring devices installed in ventilation ducts or near the fan outlet, because it can minimize the impact on the performance of the original system. In summary, by using a permanent magnet as an adsorption device and integrating all key components in the outer shell, this design greatly improves the usability, stability and reliability of the device exhaust fan wireless monitoring device, while taking into account aesthetics and practicality. It provides users with an efficient, simple and reliable solution for real-time monitoring of the working status of the device exhaust fan.

[0074] Furthermore, the device exhaust fan wireless monitoring device further includes a power supply substrate. The power supply 14 is a button battery. The button battery is made of manganese steel. The button battery is fixed on the power supply substrate through a fixing member, and the power supply substrate is fixed inside the outer shell.

[0075] Exemplarily, in the embodiment of the present application, a certain model of button battery with a diameter of 20 mm, a thickness of 3.2 mm, a voltage of 3 V, and a capacity of 210 mAh is used as the power supply component. To fix this button battery, a battery holder made of manganese steel and designed for a certain model of button battery is used as the hardware fixing component. Based on the motor diameter of 24 mm, a power supply substrate is customized for encapsulating and fixing the battery holder. During the production process of the power supply substrate, the hardware battery holder is precisely welded onto the substrate through soldering iron and soldering tin techniques, and the positive and negative power supply wires of the battery are led out. Subsequently, the button battery is inserted into the battery holder. At this time, a stable 3 V voltage can be output at both ends of the power supply wires. After the power supply 14 is installed, it is connected to the power supply port of the control circuit (including a non-inverting amplifier circuit, an inverting amplifier circuit, and a microcontroller JP1), thereby providing reliable power supply for the entire system. This design not only ensures the stability and reliability of power supply but also greatly simplifies the installation and maintenance process of the circuit.

[0076] In addition, since the power supply voltage is 3 V and the minimum signal input by the motor 12 is 50 mv, the cascaded amplifier circuit needs to amplify at least 60 times to ensure that the electrical signal is close to 3 V, so as to ensure that the microcontroller JP1 can read and process signals reliably and stably. To provide sufficient margin, the amplification factor is designed to be 100 times for circuit design.

[0077] In the embodiment of the present application, due to the small and light characteristics of the button battery, the entire wireless monitoring device becomes more compact and lightweight. This is particularly important for devices that need to be installed in a limited space because it reduces the impact on the device layout and at the same time reduces the additional load. Button batteries made of manganese steel usually have a relatively high energy density, indicating that they can store more energy in a relatively small volume. This provides a longer operating time for the monitoring device, reduces the frequency of battery replacement, and is particularly suitable for installation locations that are difficult to access or maintain. The embodiment of the present application uses a dedicated power supply substrate to fix the button battery, ensuring a stable connection between the battery and other circuit components and avoiding problems of poor contact caused by vibration or other external forces. In addition, a good electrical connection helps to improve the overall stability of the system and reduce faults caused by unstable power supply. The design of the fixing component not only ensures the safe fixation of the battery but also can play a certain role in electromagnetic shielding, further enhancing the system's resistance to external electromagnetic interference.

[0078] Exemplarily, the fan blades and the motor 12 are assembled, the red and black cables of the motor 12 are connected to the signal input end of the control circuit board, and the button battery holder is connected to the power supply end of the control mainboard through a wire. After the button battery is installed, the device can start working. The design of installing the button battery on the power supply substrate through a fixing part and fixing the power supply substrate inside the shell simplifies the battery replacement process. When the battery needs to be replaced, the operation can be completed quickly by simply opening the shell and removing the fixing part, without complicated tools or steps, which greatly facilitates daily maintenance work. Compared with other types of batteries (such as lead-acid batteries), button batteries are less expensive and have a longer service life, which can reduce operating costs in the long run. The design of the power supply substrate provides flexibility for future upgrades or modifications. For example, if more efficient battery technology appears in the future, performance can be improved by simple replacement without redesigning the entire circuit structure. This modular design increases the adaptability and scalability of the system. This design makes full use of the advantages of button batteries, combined with the stable support provided by the power supply substrate, not only to achieve a compact and lightweight appearance design, but also to ensure the energy supply required for long-term stable operation. At the same time, it also takes into account the convenience of maintenance and environmental friendliness in practical applications. It is an efficient and reliable solution suitable for equipment exhaust fan status monitoring needs under various conditions.

[0079] For the signal conversion part, the embodiment of the present application uses the principle of electromagnetic induction to design an airflow-driven motor mechanism, using the airflow of the equipment exhaust fan to drive the motor 12 to rotate, and the rotor cuts the magnetic field to generate an electrical signal. The unique electrical signal processing technology efficiently captures and amplifies weak electrical signals, and realizes the precise conversion of airflow energy into stable, readable electrical signals. This innovation is not only self-sufficient and reduces dependence on external power supplies, but also improves energy conversion efficiency and the ability of the equipment to operate autonomously, providing a new solution for related fields.

[0080] Regarding the airflow design, the detection device of the embodiment of the present application integrates four major components: fan blades, circuit mainboard, motor and power supply 14, and adopts an innovative coaxial layout strategy to optimize the airflow path, reduce resistance, and ensure efficient coordination. The circuit mainboard is uniquely placed between the fan blades and the motor 12, and the airflow thrust is used to improve the efficiency of the fan blades, achieving low energy consumption and high airflow output. The coaxial design of the power supply component reduces airflow loss and consolidates the heat dissipation performance. The overall design ensures stable and efficient heat dissipation function, significantly improves fan blade efficiency and reduces airflow loss.

[0081] Therefore, the embodiment of the present application has the following advantages: (1) By utilizing the principle of wind power generation, the airflow through the exhaust port and heat dissipation port of the exhaust fan of the equipment drives the fan blades to rotate, so that the motor 12 outputs a stable and reliable 50mV voltage signal. The amplitude of the electrical signal is proportional to the speed of the fan blades, and the speed of the fan blades reflects the exhaust volume and heat dissipation efficiency of the exhaust fan of the equipment. Based on this design, the embodiment of the present application accurately converts the fan airflow state into an electrical signal, providing a basis for intelligent monitoring and adjustment. The circuit design is simple, requiring only a set of fan blades, a motor and a few electronic components. (2) The embodiment of the present application uses 2400Mhz wireless communication technology and software coding technology to enable the monitoring device to achieve wireless communication, with a unique number, improve recognition accuracy and anti-interference ability, support large-scale deployment and efficient management, and avoid the installation complexity of traditional wired communication methods. (3) The embodiment of the present application introduces a low-power working mode design, optimizes the power supply 14 management by triggering the wake-up mechanism, ensures that the detection device is easy to install, stable and reliable, and reduces energy consumption and operation and maintenance costs. The device has a built-in permanent magnet that can be adsorbed on the surface of the device for easy installation.

[0082] Figure 6 The following is a flow chart of a method for wirelessly monitoring an exhaust fan of an equipment provided in an embodiment of the present application. Figure 6 As shown, the wireless monitoring method for the exhaust fan of the equipment is applied to Figure 1 or Figure 5 The wireless monitoring device for equipment exhaust fans provided includes:

[0083] S61. After the airflow and wind force receiving component captures the airflow and drives the rotation, the rotational mechanical energy is converted into an electrical signal through a motor.

[0084] S62, amplify the electrical signal through the amplifier circuit, convert the amplified electrical signal into a digital signal through the microcontroller, and trigger the wireless transmitting device to send the digital signal to the wireless receiving device.

[0085] S63. When the digital signal is less than or equal to a preset threshold, a warning signal is generated through a wireless receiving device and a corresponding warning action is executed.

[0086] The implementation principle and technical effect of the equipment exhaust fan wireless monitoring method described in the embodiment of the present application are similar to the implementation principle and technical effect of the above-mentioned equipment exhaust fan wireless monitoring device, which will not be repeated here.

[0087] For example, Figure 7 A flow chart of another device exhaust fan wireless monitoring method provided in an embodiment of the present application. The another device exhaust fan wireless monitoring method includes:

[0088] Determine whether the motor is rotating. If it is, then determine whether it is rotating clockwise or counterclockwise. If it is rotating counterclockwise, perform electrical signal amplification processing through a reverse amplifier. If it is rotating clockwise, perform electrical signal amplification processing through a forward amplifier. Determine whether an alarm signal occurs based on the amplified electrical signal. If the peripheral interface controller (PIC) collects an alarm signal, then determine whether the alarm signal meets the alarm conditions. If it meets the conditions, perform wireless alarm through a communication module with a 2.4G bandwidth. Otherwise, continue to collect.

[0089] The embodiment of the present application also provides a computer storage medium storing a computer program, and when the computer program is executed by a computer, it can implement the above Figure 6 device exhaust fan wireless monitoring method of the embodiment shown.

[0090] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0091] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0092] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements 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 the present application.

Claims

1. A wireless monitoring device for equipment exhaust fans, characterized in that: include: An airflow and wind force receiving component arranged on the airflow discharge side of the exhaust fan of the device to be monitored, a motor, a signal processing device, a power supply and a wireless transmitting device, and a wireless receiving device arranged at the monitoring terminal; The airflow and wind force receiving component is used to capture the airflow and drive the rotation, and the central area of ​​the airflow and wind force receiving component is provided with an axial hole; The motor is coaxially connected to the airflow and wind force receiving component, and cooperates with the output shaft of the motor through the shaft hole to convert the rotational mechanical energy into an electrical signal; The power supply is used to supply power to the signal processing device and the wireless transmission device; The signal processing device includes a cascade amplifier circuit and a microcontroller. The cascade amplifier circuit is used to amplify the electrical signal. The microcontroller is used to convert the amplified electrical signal into a digital signal and trigger the wireless sending device to send the digital signal to the wireless receiving device. When the digital signal is less than or equal to a preset threshold, the wireless receiving device generates a warning signal and performs a corresponding warning action.

2. The wireless monitoring device for equipment exhaust fans according to claim 1, characterized in that: The cascade amplifier circuit comprises an inverse amplifier circuit and a common amplifier circuit connected in series; Wherein, the first end of the reverse amplifier circuit is connected to the first end of the motor, the second end of the reverse amplifier circuit is connected to the first end of the same-direction amplifier circuit, and the second end of the same-direction amplifier circuit is connected to the first pin of the microcontroller; In the process of the airflow and wind force receiving component reversely driving the motor to rotate, the electric signal is a negative value, the voltage value of the first end of the reverse amplifier circuit is less than the voltage value of the third end of the reverse amplifier circuit, the third end of the reverse amplifier circuit is connected to the power supply, the reverse amplifier circuit is used to reversely amplify the electric signal, and the second end of the reverse amplifier circuit outputs the amplified electric signal; During the process of the airflow and wind force receiving component driving the motor to rotate in the forward direction, the electrical signal is positive, and the electrical signal is transmitted to the first end of the unidirectional amplifier circuit through the partial structure of the reverse amplifier circuit. The voltage value of the first end of the forward amplifier circuit is less than the voltage value of the third end of the forward amplifier circuit. The unidirectional amplifier circuit is used to forward amplify the electrical signal, and the second end of the forward amplifier circuit outputs the amplified electrical signal.

3. The wireless monitoring device for equipment exhaust fans according to claim 2, characterized in that: The reverse amplifier circuit comprises: a first resistor, a second resistor, a reverse amplifier, a first diode and a first capacitor; The first end of the first resistor is the first end of the reverse amplifier circuit, the second end of the first resistor is connected to the third end of the reverse amplifier, the second end of the first resistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the cathode of the first diode; The first end of the reverse amplifier is grounded, the second end of the reverse amplifier is grounded, the anode of the first diode is connected to the fourth end of the reverse amplifier, the cathode of the first diode is the second end of the reverse amplifier circuit, the fifth end of the reverse amplifier is the third end of the reverse amplifier circuit, the fifth end of the reverse amplifier is connected to one end of the first capacitor, the other end of the first capacitor is connected to the second end of the reverse amplifier, and the other end of the second capacitor is grounded.

4. The wireless monitoring device for equipment exhaust fans according to claim 2, characterized in that: The same-direction amplifier circuit comprises: a same-direction amplifier, a third resistor, a fourth resistor and a second capacitor; The first end of the same-direction amplifier is the first end of the same-direction amplifier circuit, the second end of the same-direction amplifier is grounded, the third end of the same-direction amplifier is connected to the first end of the third resistor, the second end of the third resistor is grounded, the fourth end of the same-direction amplifier is the second end of the same-direction amplifier circuit, the fifth end of the same-direction amplifier is the third end of the same-direction amplifier circuit, and the fifth end of the same-direction amplifier is grounded through the second capacitor.

5. The wireless monitoring device for equipment exhaust fans according to claim 1, characterized in that: When the microcontroller triggers the wireless transmitting device to send the digital signal to the wireless receiving device, the microcontroller also triggers the wireless transmitting device to send the identifier of the exhaust fan of the device to be monitored to the wireless receiving device; The wireless receiving device comprises a wireless receiving module, a data processing module and an early warning device connected in sequence; After the data processing device obtains the identification of the exhaust fan of the device to be monitored through the wireless receiving module, the data processing device searches for a preset threshold value corresponding to the identification based on the identification of the exhaust fan of the device to be monitored, and determines whether the digital signal is less than or equal to the preset threshold value. When the digital signal is less than or equal to the preset threshold value, an early warning signal is generated and sent to the early warning device, so that the early warning device performs a corresponding early warning action based on the early warning signal.

6. The wireless monitoring device for equipment exhaust fans according to claim 1, characterized in that: Also included is an adsorption device and a housing; The signal processing device, the power supply and the wireless transmitting device are located inside the shell, the adsorption device is located at the bottom of the shell, and the equipment exhaust fan wireless monitoring device is fixed on the surface of the equipment to be monitored.

7. The wireless monitoring device for equipment exhaust fans according to claim 6, characterized in that: It also includes a power supply substrate, the power source is a button battery, the button battery is made of manganese steel, the button battery is fixed on the power supply substrate through a fixing part, and the power supply substrate is fixed inside the shell.

8. The wireless monitoring device for equipment exhaust fans according to claim 6, characterized in that: The adsorption device comprises a permanent magnet, and the permanent magnet fixes the equipment exhaust fan wireless monitoring device on the surface of the equipment to be monitored by magnetic attraction.

9. The wireless monitoring device for equipment exhaust fans according to any one of claims 1 to 8, characterized in that: The airflow and wind force receiving component is a four-blade windmill blade, and the blade plane of the four-blade windmill blade is perpendicular to the airflow direction to maximize the capture of airflow power.

10. A method for wireless monitoring of equipment exhaust fans, characterized in that: The wireless monitoring device for the exhaust fan of the equipment as claimed in claim 1 comprises: After the airflow and wind force receiving component captures the airflow and drives the rotation, the rotational mechanical energy is converted into an electrical signal through the motor; Amplifying the electrical signal through an amplifier circuit, converting the amplified electrical signal into a digital signal through a microcontroller, and triggering the wireless transmitting device to send the digital signal to the wireless receiving device; When the digital signal is less than or equal to a preset threshold, an early warning signal is generated by the wireless receiving device and a corresponding early warning action is executed.

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