Equipment exhaust fan wireless monitoring device and method

Abstract

The present application provides a device and method for wireless monitoring of exhaust fans of equipment. The device includes: an airflow and wind force receiving component, a motor, a signal processing device, a power supply and a wireless transmitting device arranged on the airflow discharge side of the exhaust fan of the equipment to be monitored, and a wireless receiving device arranged at the monitoring terminal; the airflow and wind force receiving component captures the airflow and drives the rotation; the motor is coaxially connected to the airflow and wind force receiving component 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 transmitting device; the signal processing device includes a cascade amplifier circuit and a microcontroller, the 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 transmitting device to send the digital signal to the wireless receiving device, and the wireless receiving device generates an early warning signal and performs a corresponding early warning action when the digital signal is less than or equal to a preset threshold. The device provided by the present application has the advantage of low cost.

Description

Technical Field

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

[0002] In modern processing and manufacturing enterprises, the proper operation of equipment exhaust fans is crucial to ensuring stability and efficiency. However, due to differences in detection and alarm methods across equipment brands, unified centralized management is difficult. Traditional monitoring technologies often require complex installation, additional power supplies, and external circuitry, increasing costs and maintenance difficulties.

[0003] Existing wireless monitoring methods for equipment exhaust fans include wired and wireless monitoring. Wired connections use sensors that connect directly to the monitoring system and transmit the fan's operating status via wired transmission. Wireless monitoring uses wireless sensors (such as vibration sensors and temperature sensors) to monitor the fan's status. Existing wireless sensors have limited battery life and weak signal strength, with a wireless transmission range of only approximately 120 meters in open environments. These monitoring methods often require complex wiring, increasing installation costs and time. They also require additional power modules and complex external circuitry.

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

[0005] The embodiments of the present application provide a device and method for wirelessly monitoring exhaust fans of equipment, so as to solve the problems in the prior art of difficulty in achieving centralized monitoring and high installation costs.

[0006] In a first aspect, the present application provides a wireless monitoring device for an exhaust fan of an equipment, comprising: an airflow and wind force receiving component provided on the airflow discharge side of the exhaust fan of the equipment to be monitored, a motor, a signal processing device, a power supply and a wireless transmitting device, and a wireless receiving device provided at a monitoring terminal;

[0007] 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;

[0008] 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;

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

[0010] 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 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, the wireless receiving device generates a warning signal and performs a corresponding warning action.

[0011] Optionally, the cascade amplifier circuit includes an inverse amplifier circuit and a unidirectional amplifier circuit connected in series;

[0012] 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;

[0013] During the process of the airflow and wind force receiving component reversely driving the motor to rotate, the electrical signal is a negative value, the voltage value of the first terminal of the reverse amplifying circuit is less than the voltage value of the third terminal of the reverse amplifying circuit, the third terminal of the reverse amplifying circuit is connected to the power supply, the reverse amplifying circuit is used to reversely amplify the electrical signal, and the second terminal of the reverse amplifying circuit outputs the amplified electrical signal;

[0014] 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 amplifying circuit through part of the structure of the reverse amplifying circuit. The voltage value of the first end of the unidirectional amplifying circuit is less than the voltage value of the third end of the unidirectional amplifying circuit. The unidirectional amplifying circuit is used to forward amplify the electrical signal, and the second end of the unidirectional amplifying circuit outputs the amplified electrical signal.

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

[0016] 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;

[0017] 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 first capacitor is grounded.

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

[0019] 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.

[0020] Optionally, when triggering the wireless transmitting device to send the digital signal to the wireless receiving device, the microcontroller also triggers the wireless transmitting device to send an identifier of an 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 an early warning device connected in sequence;

[0022] After the data processing module obtains the identification of the exhaust fan of the equipment to be monitored through the wireless receiving module, it searches for a preset threshold value corresponding to the identification based on the identification of the exhaust fan of the equipment 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, it generates an early warning signal and sends the early warning signal to the early warning device, so that the early warning device performs a corresponding early warning action based on the early warning signal.

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

[0024] 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 device exhaust fan wireless monitoring apparatus is fixed on the surface of the device to be monitored.

[0025] Optionally, the equipment exhaust fan wireless monitoring device also includes a power supply substrate, the power supply is a button battery, the button battery is made of manganese steel, the button battery is fixed to the power supply substrate through a fixing part, and the power supply substrate is fixed inside the shell.

[0026] Optionally, the adsorption device includes 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.

[0027] Optionally, 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.

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

[0029] After the airflow and wind power receiving component captures the airflow and drives the rotation, the rotational mechanical energy is converted into an electrical signal through the motor;

[0030] 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 transmit the digital signal to the wireless receiving device;

[0031] 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 performed.

[0032] In an embodiment of the present application, a wireless monitoring device for an equipment exhaust fan is provided, which includes: an airflow and wind force receiving component arranged on the airflow discharge side of the exhaust fan of the equipment 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 axial 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 transmitting device; the signal processing device includes a cascade 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 transmitting device to send the digital signal to the wireless receiving device, and the wireless receiving device generates an early warning signal and executes a corresponding early warning action when the digital signal is less than or equal to a preset threshold.

[0033] The embodiments of the present application utilize the principles of wind power generation. The airflow from the exhaust fan of the monitored equipment drives the airflow and wind force receiving component to rotate, causing the motor to output a stable and reliable electrical signal. The signal amplitude is proportional to the rotational speed of the airflow and wind force receiving component, thereby reflecting the operating status and efficiency of the exhaust fan of the monitored equipment. This method has its own power supply and does not require an additional power supply module, reducing installation complexity. The present application implements wireless communication functions with low power consumption through wireless transmitting devices and wireless receiving devices. Each device exhaust fan wireless monitoring device and the exhaust fan of the monitored equipment can be uniquely numbered, enhancing identification accuracy and anti-interference capabilities, making it suitable for large-scale deployment. Furthermore, the embodiments of the present application can introduce a low-power operating mode design, optimize power management by triggering a wake-up mechanism, ensure that the device is both easy to install and stable and reliable in operation, reducing energy consumption and operation and maintenance costs. In summary, the present application provides a highly integrated, self-powered, and easy-to-install wireless monitoring device for equipment exhaust fans, which solves the problems of short signal transmission distance and complex installation in the prior art, greatly improving the intelligent level of management of the monitored equipment and production stability.

[0034] These and other aspects of the present application will become more readily apparent from the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 A schematic diagram of the structure of a wireless monitoring device for an exhaust fan of an equipment provided in an embodiment of the present application; Figure 2 A schematic structural diagram of a four-blade windmill fan blade provided in an embodiment of the present application;

[0037] Figure 3 A schematic diagram of the structure of a motor provided in an embodiment of the present application;

[0038] Figure 4 A schematic structural diagram of a cascade amplifier circuit provided in an embodiment of the present application;

[0039] Figure 5 A schematic diagram of the structure of another device exhaust fan wireless monitoring device provided in an embodiment of the present application;

[0040] Figure 6 A flowchart of a method for wirelessly monitoring an exhaust fan of an equipment provided in an embodiment of the present application;

[0041] Figure 7 A flowchart of another method for wirelessly monitoring exhaust fans of equipment provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0043] In some of the processes described in the specification and claims of this application and the above-mentioned figures, multiple operations that appear in a specific order are included, but 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 serial numbers of the operations, such as 11, 12, etc., are only used to distinguish between different operations, and the serial numbers themselves do not represent any order of execution. 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 of "first", "second", etc. in this document are used to distinguish different messages, devices, modules, etc., and do not represent a sequential order, nor do they limit "first" and "second" to being different types.

[0044] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0045] Figure 1 This is a flow chart of a wireless monitoring device for an exhaust fan of an equipment provided in an embodiment of the present application, such as Figure 1 As shown, the device includes: an airflow and wind force receiving component 11 arranged on the airflow discharge side of the exhaust fan of the equipment to be monitored, a motor 12, a signal processing device 13, a power supply 14 and a wireless sending device 15, and a wireless receiving device 16 arranged at the monitoring terminal.

[0046] The functions of each device are described below: the airflow and wind force receiving component 11 is used to capture the airflow and drive the rotation, and the central area of ​​the airflow and wind force receiving component 11 is provided with an axial hole; the motor 12 is coaxially connected to the airflow and wind force receiving component 11, and cooperates with the output shaft of the motor 12 through the axial 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 transmitting device 15; the signal processing device 13 includes a cascade amplifier circuit 131 and a microcontroller 132, the cascade 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 transmitting device 15 to send the digital signal to the wireless receiving device 16, and the wireless receiving device 16 generates a warning signal and performs a corresponding warning action when the digital signal is less than or equal to a preset threshold.

[0047] The wireless transmitting device 15 and the wireless receiving device 16 can each include a wireless communication module with a bandwidth of 2.4G and a capacitor. The dimensions are 19*12*2mm and the operating frequency is 2400MHz.

[0048] In this embodiment, an airflow and wind force receiving component 11 (e.g., a four-blade windmill fan) captures the airflow discharged by the device's exhaust fan and drives its rotation. A motor 12 is coaxially connected to this component, effectively converting the captured airflow kinetic energy into a stable electrical signal output. This design enables the generation of detectable electrical signals even in low wind speed conditions, improving monitoring sensitivity and accuracy. A cascade amplifier circuit amplifies the weak electrical signal converted from mechanical energy, ensuring sufficient signal strength for subsequent processing. A microcontroller further converts the amplified analog electrical signal into a digital signal and, based on preset logic, determines whether an alarm should be triggered. This design ensures accurate and reliable signal processing and reduces the possibility of false alarms. Triggered by the microcontroller, a wireless transmitting device 15 transmits a digital signal containing device status information to a remote wireless receiving device 16. This wireless communication method eliminates the complex wiring issues of traditional wired monitoring systems, supports more flexible and convenient installation and deployment, and enables centralized management and monitoring of multiple devices. When the received digital signal is below or equal to a preset threshold, the wireless receiving device 16 automatically identifies the abnormality and immediately generates a warning signal to initiate the corresponding warning action. This feature helps to promptly detect abnormal operation of the exhaust fan, prevent overheating and damage to the equipment due to poor heat dissipation, and ensure the safe and stable operation of the equipment. Due to the use of a 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 dependence on external power supplies and other complex external circuits, simplifies the installation process, reduces maintenance costs and difficulty, and improves the economy and practicality of the overall system. In summary, this equipment exhaust fan wireless monitoring device not only realizes accurate monitoring of the exhaust fan's working status, but also provides a convenient remote monitoring solution through wireless technology, effectively improving equipment management and maintenance efficiency.

[0049] As a possible embodiment, Figure 2 As shown, the airflow and wind force receiving component 11 is a four-blade windmill blade 111, and the blade plane of the four-blade windmill blade 111 is perpendicular to the airflow direction to maximize the capture of airflow power.

[0050] It should be understood that the four-leaf windmill blade 111 can be simply referred to as a blade. Since the central area of ​​the airflow and wind force receiving component 11 is provided with an axial hole, and the airflow and wind force receiving component 11 is a four-leaf windmill blade 111, the central area of ​​the four-leaf windmill blade 111 is provided with an axial hole 112.

[0051] For example, the embodiment of the present application uses a four-blade windmill fan blade 111 with a diameter of 100mm and an aperture of 2mm as the airflow and wind force receiving component 11, and the length of a single blade in the four-blade windmill fan blade 111 is 44mm. This fan blade design can effectively capture and respond to changes in airflow. At the same time, a motor 12 with a diameter of 24mm, a height of 9mm, a shaft diameter of 2mm, and a shaft length of 4.7mm is selected as the conversion component of the sensor signal, and the line length of the motor 12 can be set to 70mm. The motor 12 has the characteristics of compact structure and high conversion efficiency. During the assembly process, the 2mm aperture of the fan blade is precisely matched with the 2mm shaft diameter of the motor 12 to ensure that the fan blade can drive the motor 12 to rotate smoothly and efficiently. When the fan blade encounters an airflow perpendicular to the fan blade plane, the fan blade will rotate around the motor axis, thereby driving the motor 12 to rotate together. Based on the principle of force generating magnetism and magnetism generating electricity, a DC voltage signal is generated on the motor coil cable inside the motor 12. Experimental testing has shown that when the fan blades rotate at a speed of no less than 100 revolutions per minute, the voltage signal output across motor 12 is stable and greater than or equal to 50mV. This conversion process efficiently and accurately converts airflow power into a quantifiable electrical signal output. Through the above-described design and technical means, the embodiments of the present application successfully convert airflow into electrical signals, providing a solid foundation for subsequent signal processing and analysis.

[0052] like Figure 3 As shown, the outer diameter of the output shaft 121 of the motor is Figure 2 The inner diameters of the central shaft holes 112 are the same.

[0053] As a possible embodiment, the cascade amplifier circuit includes an inverse amplifier circuit and a unidirectional amplifier circuit connected in series; wherein, the first end of the inverse amplifier circuit is connected to the first end of the motor 12, the second end of the inverse amplifier circuit is connected to the first end of the unidirectional amplifier circuit, and the second end of the unidirectional amplifier circuit is connected to the first pin of the microcontroller.

[0054] During the process of the airflow and wind force receiving component 11 driving the motor 12 in the reverse direction to rotate, the electrical signal is negative, the voltage value of the first terminal of the reverse amplifying circuit is less than the voltage value of the third terminal of the reverse amplifying circuit, the third terminal of the reverse amplifying circuit is connected to the power supply 14, the reverse amplifying circuit is used to reversely amplify the electrical signal, and the second terminal of the reverse amplifying circuit outputs the amplified electrical signal. Alternatively, during the process of the airflow and wind force receiving component 11 driving the motor 12 in the forward direction to rotate, the electrical signal is positive, the electrical signal is transmitted to the first terminal of the same-direction amplifying circuit via a portion of the reverse amplifying circuit structure, the voltage value of the first terminal of the same-direction amplifying circuit is less than the voltage value of the third terminal of the same-direction amplifying circuit, the same-direction amplifying circuit is used to forward amplify the electrical signal, and the second terminal of the same-direction amplifying circuit outputs the amplified electrical signal.

[0055] The embodiments of the present application possess bidirectional electrical signal processing capabilities. By designing a cascaded amplifier circuit comprising a reverse amplification circuit and a non-reciprocal amplification circuit, it can effectively process both positive and negative electrical signals from the motor 12. When the airflow and wind force receiving component 11 drives the motor 12 in the reverse direction, the negative electrical signal generated is amplified by the reverse amplification circuit; whereas, when it drives the motor 12 in the forward direction, the positive electrical signal is amplified by the non-reciprocal amplification circuit. This design ensures that regardless of the fan blade rotation (whether due to changes in airflow direction or the device's inherent characteristics), the corresponding electrical signal can be accurately captured and amplified, improving the system's adaptability and reliability. Furthermore, the reverse amplification circuit and the non-reciprocal amplification circuit each amplify specific electrical signals (negative or positive), effectively increasing the amplitude of the original weak electrical signal, making it more suitable for subsequent digital conversion and analysis. This not only enhances signal readability but also improves the stability and accuracy of the entire monitoring system. By employing a circuit design specifically designed to amplify electrical signals of different polarities, the system can more accurately distinguish and quantify different fan operating states (e.g., normal operation, reverse rotation, or abnormal stoppage). This design helps improve the accuracy of determining the exhaust fan's actual operating status, thereby triggering early warning mechanisms more promptly and accurately to prevent potential failures. Combining the reverse and unidirectional amplifier circuits in a cascaded fashion allows for effective amplification of bidirectional electrical signals without significantly increasing circuit complexity. This approach ensures the functional integrity of the circuit while saving space and costs, making the overall design more compact and efficient. Therefore, the cascaded amplifier circuit design, comprising reverse and unidirectional amplifier circuits, significantly improves the overall performance of the equipment's exhaust fan wireless monitoring device through its bidirectional signal processing capabilities and precise amplification of electrical signals. It excels in signal capture, amplification, and final status determination, providing support for real-time monitoring and maintenance.

[0056] Further, such as Figure 4 As shown, the inverting amplifier circuit 311 in the cascade amplifier circuit includes: a first resistor R1, a second resistor R2, an inverting amplifier U1, a first diode D1, and a first capacitor C1.

[0057] The first end of the first resistor R1 is the first end of the reverse amplifier circuit, the second end of the first resistor R1 is connected to the third end of the reverse 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 reverse amplifier U1 is grounded, the second end of the reverse amplifier U1 is grounded, the anode of the first diode D1 is connected to the fourth end of the reverse amplifier U1, the cathode of the first diode D1 is the second end of the reverse amplifier circuit, the fifth end of the reverse amplifier U1 is the third end of the reverse amplifier circuit, the fifth end of the reverse amplifier U1 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to the second end of the reverse amplifier U1, and the other end of the first capacitor C1 is grounded.

[0058] 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 set in each of the reverse amplifier circuits to serve as a single-phase conduction valve for the subsequent inverting amplifier and the same-direction amplifier, which can effectively ensure that the negative signal output when the inverting amplifier is input with a positive signal will not interfere with the back-end circuit.

[0059] For example, in the embodiment of the present application, the amplification factor can be set by selecting the parameter values ​​of the first resistor R1 and the second resistor R2. The calculation formula is: amplification factor Nr = R2 / R1, where R2 is 1K and R1 is 100K, resulting in a 100x amplification factor. The input of the inverting amplifier is connected to one end of the motor coil, the other end of the motor coil is connected to the reference ground, and the output of the inverting amplifier is connected to the positive electrode of the unidirectional isolation diode D1. When the fan blades rotate in the reverse direction, the output signal of the motor 12 is negative. The inverting amplifier circuit can invert the negative signal and amplify it to a positive value, thereby turning on the first diode D1 and causing the output signal to have a voltage drop of 0.6V. The first capacitor C1 can be a ceramic capacitor.

[0060] In this embodiment of the present application, when the airflow and wind force receiving component 11 reverse-drives the motor 12, the generated negative electrical signal is processed by the reverse amplifier circuit. Due to the design of the reverse amplifier U1, it can convert this negative signal into a positive value and amplify it, allowing the microcontroller to more accurately read and process these signals. By properly 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 improve the accuracy of the entire monitoring system, ensuring consistent performance even under different operating conditions. The first diode D1 is connected between the fourth terminal (usually the output terminal) of the reverse amplifier U1 and the second resistor R2, providing a protection mechanism. If abnormally high voltage occurs, the diode can quickly turn on, preventing excessive voltage from damaging subsequent circuit components and ensuring safe operation of the system. The first capacitor C1 is connected between the fifth terminal (which can be the power supply 14 or reference voltage terminal) of the reverse amplifier U1 and ground, acting as a bypass capacitor to filter high-frequency noise, purify the power supply, and ensure the stability of the reverse amplifier U1. The two ends of the first capacitor C1 are connected to the first terminal and other locations of the reverse amplifier U1, respectively, to perform a filtering function. The component selection and layout of this circuit design help enhance the overall system's resistance to electromagnetic interference. This design can effectively reduce the impact of external factors on signal acquisition, ensuring accurate and reliable data transmission, especially in industrial environments, where a large number of electrical devices and potential sources of electromagnetic interference are present. In summary, this inverting amplifier circuit, through its specific component configuration and connection method, not only effectively amplifies and inverts the input signal, but also provides necessary protection and filtering capabilities, improving overall system stability and accuracy, enabling efficient and reliable exhaust fan status monitoring.

[0061] Further, such as Figure 4 As shown, the non-directional amplifier circuit 312 in the cascade amplifier circuit includes: a non-directional amplifier U2, a third resistor R3, a fourth resistor R4, and a second capacitor C2. The first terminal of the non-directional amplifier U2 serves as the first terminal of the non-directional amplifier circuit, the second terminal of the non-directional amplifier U2 is grounded, the third terminal of the non-directional 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-directional amplifier U2 serves as the second terminal of the non-directional amplifier circuit, the fifth terminal of the non-directional amplifier U2 serves as the third terminal of the non-directional amplifier circuit, and the fifth terminal of the non-directional amplifier U2 is grounded via the second capacitor C2.

[0062] Exemplarily, the embodiment of the present application sets the amplification factor by taking the values ​​of the two resistance parameters of the third resistor R3 and the fourth resistor R4. The calculation formula is: amplification factor Nt=(R4+R3) / R3. If the fourth resistor R4 takes a value of 1K and the third resistor R3 takes a value of 100K, the amplification factor is approximately 100 times. The input end of the non-inverting amplifier is connected to the negative electrode of the first diode D1 and the feedback resistor of the inverting amplifier (that is, the second resistor R2), and the output end of the non-inverting amplifier is connected to the first pin of the microcontroller. When the fan blades rotate in the forward direction, the output signal of the motor 12 is positive, and the electrical signal is input to the non-inverting amplifier circuit through the feedback resistor of the inverting amplifier. The non-inverting amplifier amplifies and outputs the electrical signal, so that it can be stably and reliably read by other pins of the microcontroller. If the fan blades rotate in the reverse direction, the first diode D1 is turned on at the negative pole, and a 2.4V voltage signal is given to the input end of the non-inverting amplifier (the output of the inverting amplifier is 3V, and the diode conduction voltage drop is 0.6V, so it is 2.4V here). After being amplified by the non-inverting amplifier, the 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.

[0063] In this embodiment of the present application, the non-directional amplifier U2 is used to perform positive-phase amplification on the input electrical signal. When the airflow and wind force receiving component 11 drives the motor 12 in the forward direction, the generated positive electrical signal is processed by the non-directional amplifier circuit. Due to the design of the non-directional amplifier U2, it can directly amplify this positive signal without changing its polarity, ensuring that the original direction of the signal remains unchanged, facilitating accurate reading and processing by the subsequent microcontroller. The selection of the third resistor R3 and the fourth resistor R4 determines the gain (i.e., the amplification factor) of the non-directional amplifier circuit. By precisely selecting the resistance values ​​of these two resistors, the amplification factor can be controlled to meet the requirements of different application scenarios. In addition, this configuration helps maintain the stability and linearity of the output signal, maintaining consistent performance even with varying input signal strength. The second capacitor C2 is connected between the fifth terminal of the non-directional amplifier U2 and ground, acting as a bypass capacitor, effectively filtering high-frequency noise, purifying the power supply, and ensuring the stability of the non-directional amplifier U2. This helps reduce the impact of external electromagnetic interference on the signal, improving the interference resistance and signal quality of the entire monitoring system. A characteristic of the non-directional amplifier U2 is its high input impedance. Therefore, it has minimal impact on the load of the preceding circuitry and draws virtually no current from the input source, enabling a more realistic reflection of the input signal's state and avoiding signal distortion due to load effects. By using a unidirectional amplifier U2 and its simple peripheral components (such as resistors and capacitors), not only is effective signal amplification achieved, but the circuit design is also simplified, potential failure points are reduced, and system reliability and durability are improved. In summary, this unidirectional amplifier circuit, through its specific component configuration and connection method, effectively amplifies the input signal while preserving its original polarity. It also provides the necessary filtering, enhancing the system's anti-interference capabilities, simplifying the design, and improving overall stability and reliability, making it crucial for efficient and reliable exhaust fan status monitoring. This design enables accurate capture and amplification of the electrical signal output from motor 12, regardless of forward or reverse drive conditions, laying a solid foundation for subsequent signal processing and early warning mechanisms.

[0064] Further, such as Figure 5 As shown, another wireless monitoring device for exhaust fans further includes a voltage stabilization circuit located between the dual-stage amplifier circuit and the microcontroller. The voltage stabilization circuit includes a second diode D2 and a fifth resistor R5. In this embodiment, the fifth resistor R5 is connected in series to control the current in the second diode D2, thereby maintaining a relatively stable voltage level. The second diode D2 can be a Zener diode.

[0065] Further, such as Figure 5As shown, another device exhaust fan wireless monitoring device further includes a third capacitor C3, a sixth resistor R6 and another controller JP2, the microcontroller JP1 is connected to the other controller JP2. The motor 12 is connected to one end of the first resistor R1.

[0066] Furthermore, when the microcontroller JP1 triggers the wireless transmitting device 15 to send a digital signal to the wireless receiving device 16, it also triggers the wireless transmitting device 15 to send the identification of the exhaust fan of the device 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 module obtains the identification of the exhaust fan of the device to be monitored through the wireless receiving module, based on the identification of the exhaust fan of the device to be monitored, it searches for a preset threshold corresponding to the identification, 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 a corresponding early warning action based on the early warning signal.

[0067] Exemplarily, the wireless receiving device 16 can use a type-C interface for 5V power supply; use a 3.6-inch two-digit positive-supply digital tube as a receiving circuit display window to display the received alarm information number; use a 5V buzzer as an early warning device; use two touch buttons for querying the sending / receiving data of the wireless receiving device 16; this application can use any type of chip to enable data communication between the wireless receiving device 16 and the computer; the wireless receiving device 16 in the embodiment of this application can 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 information from the wireless communication module, to control the display of the content of the two-digit positive-supply digital tube, to control the alarm and stop of the 5V buzzer, to control the information input of the touch button, and to control the reliable operation of the control logic of the entire wireless receiving device 16.

[0068] In this embodiment of the present application, microcontroller JP1 not only triggers the wireless transmitter 15 to transmit the monitored digital signal (indicating the exhaust fan's operating status) but also simultaneously transmits the unique identifier of the exhaust fan of the monitored device. Therefore, the status information of each exhaust fan can be accurately identified and classified, ensuring that data from different devices is not confused. This design is particularly suitable for large-scale monitoring systems with multiple exhaust fans of the same or different types. The identifier can clearly distinguish the status of each exhaust fan, improving management efficiency. After receiving the exhaust fan identifier, the data processing module can use it to search for the corresponding preset threshold. Different exhaust fans may require different operating thresholds due to their installation location, operating environment, or performance parameters. This personalized threshold setting enables the system to more accurately determine whether each exhaust fan is in normal operating condition. For example, in a demanding industrial environment, exhaust fans in certain critical areas may require more stringent operating standards, while less critical areas may use more relaxed standards. When the digital signal is less than or equal to the preset threshold, it indicates that the exhaust fan may be faulty or about to fail (for example, if the speed is too low, resulting in insufficient heat dissipation). At this time, the data processing module generates a warning signal and sends it to the warning device. The early warning device performs corresponding actions based on the received early warning signal, such as sounding an alarm, lighting a warning light, sending a text message notification, etc., to promptly remind maintenance personnel to conduct inspections and repairs, and avoid equipment overheating or other serious consequences due to exhaust fan failure. Due to the use of a personalized threshold setting method based on identification, the entire system has high flexibility and scalability. Newly added exhaust fans can be easily added to the monitoring network by simply assigning a unique identification and setting the corresponding threshold, without the need to make major adjustments to the existing system architecture. As needs change, the embodiment of the present application can also conveniently adjust the threshold settings of each exhaust fan to further optimize system performance. In summary, by sending the exhaust fan identification and the corresponding digital signal through the microcontroller JP1, combined with the data processing logic of the wireless receiving device 16, accurate monitoring and intelligent early warning of the status of each exhaust fan are achieved. This method not only improves the accuracy and reliability of the monitoring system, but also enhances the flexibility and maintainability of the system.

[0069] Furthermore, the equipment exhaust fan wireless monitoring device also includes an adsorption device and a shell; the signal processing device 13, power supply 14 and wireless sending device 15 are located inside the shell, and the adsorption device is located at the bottom of the shell, fixing the equipment exhaust fan wireless monitoring device on the surface of the equipment to be monitored.

[0070] Specifically, the adsorption device includes a permanent magnet, which fixes the equipment exhaust fan wireless monitoring device on the surface of the equipment to be monitored by magnetic attraction.

[0071] Using permanent magnets as an adsorption device, wireless monitoring devices can be conveniently fixed directly to the metal surface of the equipment to be monitored. No drilling, screw fixing, or other complex installation steps are required, greatly simplifying the installation process and reducing installation time and costs. This simple installation method is ideal for applications where the monitoring location needs to be frequently changed or adjusted, increasing the system's flexibility and adaptability. The strong magnetic attraction provided by the permanent magnets ensures that the monitoring device is firmly attached to its mounting location and will not easily fall off even in the event of vibration or minor collisions. This ensures stable operation of the device in various industrial environments and reduces the risk of measurement errors or equipment damage caused by accidental movement. This design is particularly important in some special environments (such as workplaces with harsh conditions such as vibration and shock) because it enhances the reliability and durability of the entire device.

[0072] The housing design not only provides physical protection for the signal processing device 13, power supply 14, and wireless transmission device 15, protecting them from external dust, moisture, and other potentially damaging factors, but also provides a certain degree of electromagnetic shielding, reducing the impact of external electromagnetic interference on the internal circuitry, thereby improving the accuracy and stability of data transmission. Furthermore, the housing can be customized according to actual needs, such as selecting corrosion-resistant materials or materials with waterproof and dustproof properties to adapt to different working environments. The integrated design reduces the footprint of the entire monitoring device, making it easy to integrate into existing equipment layouts without affecting the operation or maintenance of other components. The compact design also helps reduce wind resistance, which is particularly important for monitoring devices installed in ventilation ducts or near fan outlets, as it minimizes the impact on existing system performance. In summary, by using permanent magnets as an adsorption device and integrating all key components within the housing, this design greatly improves the ease of use, stability, and reliability of the equipment exhaust fan wireless monitoring device, while also balancing aesthetics and practicality. It provides users with an efficient, simple, and reliable solution for real-time monitoring of the operating status of equipment exhaust fans.

[0073] Furthermore, the equipment exhaust fan wireless monitoring device also 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 to the power supply substrate through a fixing part, and the power supply substrate is fixed inside the shell.

[0074] For example, the embodiment of the present application uses a button cell battery of a certain model with a diameter of 20 mm, a thickness of 3.2 mm, a voltage of 3 V, and a capacity of 210 mAh as the power supply component. To secure the button cell, a battery holder made of manganese steel and designed for a specific button cell model is used as a hardware fixture. Based on the motor's 24 mm diameter, a custom power supply baseboard was constructed to house and secure the battery holder. During the production of the power supply baseboard, the battery holder is precisely soldered to the baseboard using a soldering iron and soldering techniques, and the positive and negative power lines of the battery are connected. Subsequently, the button cell is inserted into the battery holder, at which point a stable 3 V voltage is output at both ends of the power line. After the power supply 14 is installed, it is connected to the power port of the control circuit (including the positive-inverting amplifier circuit, the reverse-inverting amplifier circuit, and the microcontroller JP1) to provide a reliable power supply for the entire system. This design not only ensures stable and reliable power supply but also greatly simplifies circuit installation and maintenance.

[0075] In addition, since the power supply voltage is 3V and the minimum signal input by motor 12 is 50mV, the cascade amplifier circuit needs to amplify the signal by at least 60 times to ensure that the electrical signal is close to 3V, so that the microcontroller JP1 can reliably and stably read and process the signal. To provide sufficient margin, the circuit design uses a 100-fold amplification factor.

[0076] In the embodiment of the present application, the button battery, with its small size and light weight, makes the entire wireless monitoring device more compact and lightweight. This is especially important for equipment that needs to be installed in a limited space, because it reduces the impact on the equipment layout and reduces the additional load. Button batteries made of manganese steel generally have a higher energy density, which means 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 poor contact problems caused by vibration or other external forces. In addition, a good electrical connection helps to improve the overall stability of the system and reduce failures caused by unstable power supply. The design of the fixings not only ensures the safe fixation of the battery, but also plays a certain electromagnetic shielding role, further enhancing the system's resistance to external electromagnetic interference.

[0077] For example, the fan blades and motor 12 are assembled. The red and black cables of the motor 12 are connected to the signal input terminals of the control circuit board. The button battery holder is connected to the power supply terminals of the control board via wires. Once the button battery is installed, the device can begin operation. The button battery is mounted on the power supply baseboard using fasteners, and the power supply baseboard is secured inside the housing. This design simplifies battery replacement. When the battery needs to be replaced, simply open the housing and remove the fasteners, completing the operation quickly without the need for complex tools or steps, greatly facilitating routine maintenance. Compared to other types of batteries (such as lead-acid batteries), button batteries are less expensive and have a longer lifespan, which can reduce operating costs in the long term. The power supply baseboard design provides flexibility for future upgrades or modifications. For example, if more efficient battery technology becomes available in the future, performance can be improved through simple replacement without having to redesign the entire circuit structure. This modular design increases the adaptability and scalability of the system. This design leverages the advantages of the button battery and combines it with the stable support provided by the power supply baseboard to achieve a compact and lightweight design while ensuring the energy supply required for long-term stable operation. At the same time, it also takes into account the maintenance convenience and environmental friendliness in actual applications. It is an efficient and reliable solution suitable for equipment exhaust fan status monitoring needs under various conditions.

[0078] Regarding signal conversion, the present embodiment utilizes the principle of electromagnetic induction to design an airflow-driven motor mechanism. This mechanism utilizes the airflow from the device's exhaust fan to rotate the motor 12, which then cuts through the magnetic field to generate an electrical signal. Unique electrical signal processing technology efficiently captures and amplifies weak electrical signals, enabling precise conversion of airflow energy into stable, readable electrical signals. This innovation not only reduces reliance on external power sources through self-sufficiency but also improves energy conversion efficiency and the device's autonomous operation capabilities, providing a novel solution for related fields.

[0079] Regarding the airflow design, the detection device of the embodiment of the present application integrates four major components: fan blades, circuit board, motor, and power supply 14. It adopts an innovative coaxial layout strategy to optimize the airflow path, reduce resistance, and ensure efficient coordination. The circuit board 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 efficiency. The overall design ensures stable and efficient heat dissipation function, significantly improves fan blade efficiency and reduces airflow loss.

[0080] Therefore, the embodiment of the present application has the following advantages: (1) 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 fan blade speed, and the fan blade speed 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 identification accuracy and anti-interference ability, support large-scale deployment and efficient management, and avoid the complex installation problems 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.

[0081] Figure 6 This is a flow chart of a method for wirelessly monitoring exhaust fans of a device provided in an embodiment of the present application. Figure 6 As shown, the wireless monitoring method for exhaust fans of the equipment is applied to Figure 1 or Figure 5 The wireless monitoring device for equipment exhaust fans provided includes:

[0082] 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 the motor.

[0083] 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.

[0084] 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.

[0085] The implementation principle and technical effects of the equipment exhaust fan wireless monitoring method described in the embodiment of the present application are similar to the implementation principle and technical effects of the above-mentioned equipment exhaust fan wireless monitoring device, and will not be repeated here.

[0086] For example, Figure 7 This is a flow chart of another device exhaust fan wireless monitoring method provided in an embodiment of the present application. The other device exhaust fan wireless monitoring method includes:

[0087] Determine whether the motor is rotating. If so, determine whether it is rotating clockwise or counterclockwise. If it is rotating counterclockwise, a reverse amplifier is used to amplify the electrical signal. If it is rotating clockwise, a forward amplifier is used to amplify the electrical signal. Determine whether an alarm signal has occurred based on the amplified electrical signal. If the peripheral interface controller (PIC) collects the alarm signal, determine whether the alarm signal meets the alarm conditions. If so, a wireless alarm is issued through the 2.4G bandwidth communication module. Otherwise, collection continues.

[0088] The present application also provides a computer storage medium storing a computer program, wherein the computer program can achieve the above-mentioned Figure 6 The wireless monitoring method for equipment exhaust fans of the illustrated embodiment.

[0089] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0090] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0091] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions 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 provided 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 provided 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 transmitting 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 transmitting device to transmit 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. The cascade amplifier circuit includes an inverse amplifier circuit and a unidirectional 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; During the process of the airflow and wind force receiving component reversely driving the motor to rotate, the electrical signal is a negative value, the voltage value of the first terminal of the reverse amplifying circuit is less than the voltage value of the third terminal of the reverse amplifying circuit, the third terminal of the reverse amplifying circuit is connected to the power supply, the reverse amplifying circuit is used to reversely amplify the electrical signal, and the second terminal of the reverse amplifying circuit outputs the amplified electrical 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, the electrical signal is transmitted to the first end of the in-phase amplification circuit via a partial structure of the inverse amplification circuit, the voltage value of the first end of the in-phase amplification circuit is less than the voltage value of the third end of the in-phase amplification circuit, the in-phase amplification circuit is used to forward amplify the electrical signal, and the second end of the in-phase amplification circuit outputs the amplified electrical signal; The reverse amplifier circuit includes: 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 first capacitor is grounded.

2. The wireless monitoring device for equipment exhaust fans according to claim 1, characterized in that: The same-direction amplifier circuit includes: 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.

3. 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 includes a wireless receiving module, a data processing module and an early warning device connected in sequence; After the data processing module obtains the identification of the exhaust fan of the equipment to be monitored through the wireless receiving module, it searches for a preset threshold value corresponding to the identification based on the identification of the exhaust fan of the equipment 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, it generates an early warning signal and sends the early warning signal to the early warning device, so that the early warning device performs a corresponding early warning action based on the early warning signal.

4. The wireless monitoring device for equipment exhaust fans according to claim 1, characterized in that: Also included are adsorption equipment and 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 device exhaust fan wireless monitoring apparatus is fixed on the surface of the device to be monitored.

5. The wireless monitoring device for equipment exhaust fans according to claim 4, 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 piece, and the power supply substrate is fixed inside the shell.

6. The wireless monitoring device for equipment exhaust fans according to claim 5, characterized in that: The adsorption device includes 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.

7. The wireless monitoring device for equipment exhaust fans according to any one of claims 1 to 6, 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.

8. A wireless monitoring method for equipment exhaust fans, characterized in that: The wireless monitoring device for the equipment exhaust fan according to claim 1 comprises: After the airflow and wind power 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 transmit 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 performed.

Images