A device capable of automatically cleaning spider webs from visibility meters

Abstract

The present invention proposes a device for automatically cleaning cobwebs from a visibility meter. The device comprises a cobweb removal device body mounted on the visibility meter. The cobweb removal device body comprises a hollow channel with a mesh partition installed at one end and connected to a container at the other end. A permanent magnet brushless DC motor is installed within the channel near the mesh partition. A side of the channel between the container and the permanent magnet brushless DC motor is provided with evenly distributed, openable holes. A control circuit board is placed within the container and connected to the permanent magnet brushless DC motor. Before using the visibility meter, the operator can turn on the switch of the present invention to automatically clean the visibility meter, facilitating cobweb cleaning while minimizing power consumption.

Description

Technical Field

[0001] The invention relates to the technical field of spider web cleaning, in particular to a device capable of automatically cleaning spider webs on a visibility meter. Background Art

[0002] A visibility meter is an instrument that measures the atmospheric extinction coefficient and uses an empirical formula to calculate the distance observed by the naked eye in the atmosphere. Visibility meters provide users with accurate, real-time visibility data, effectively mitigating driving safety hazards caused by smog. They are commonly used in weather stations and on highways. However, visibility meters are typically installed at a fixed height, which can easily lead to spider webs forming above them, affecting the accuracy of measurement results. This requires workers to climb to the required height to manually clean the webs, making it extremely inconvenient. Therefore, there is a need for a device to remove spider webs from visibility meters. Summary of the Invention

[0003] In response to the deficiencies in the above-mentioned background technology, the present invention proposes a device that can automatically clean cobwebs on a visibility meter. Before using the visibility meter, the experimenter can turn on the switch to automatically clean the visibility meter, which makes it convenient for the staff to clean the cobwebs while minimizing power consumption.

[0004] The technical solution of the present invention is implemented as follows: when air is introduced into a closed container with only one small hole, the internal pressure of the container increases, causing the gas at the small hole to flow out to the outside at an extremely fast speed. When the air introduction rate is increased to a certain value, the flow rate of the gas at the small hole will also reach a maximum value.

[0005] Based on this, the present invention proposes a device that can automatically clean cobwebs on a visibility meter; it includes a cobweb removal device body installed on the visibility meter, the cobweb removal device body is a hollow channel, one end of the channel is installed with a mesh partition, the other end of the channel is connected to a container, a permanent magnet brushless DC motor is installed inside the channel near the mesh partition, and one side of the channel between the container and the permanent magnet brushless DC motor is provided with evenly distributed openable and closable small holes; a control circuit board is placed in the container, and the control circuit board is connected to the permanent magnet brushless DC motor.

[0006] The permanent magnet brushless DC motor is equipped with fan blades, and the permanent magnet brushless DC motor is installed in the channel through a first rotating shaft; the mesh partition is installed on the channel through a second rotating shaft.

[0007] The opening and closing states of the small hole are controlled by an electromagnet.

[0008] A connecting structure is provided below the spider web removal device body, and the spider web removal device body is fixed above the visibility meter through the connecting structure; and the visibility meter is close to the small hole.

[0009] The control circuit board includes a single-chip microcomputer control circuit, a transistor relay drive circuit, a motor drive circuit, and a DC regulated power supply circuit; the DC regulated power supply circuit supplies power to the single-chip microcomputer control circuit, the transistor relay drive circuit, and the motor drive circuit respectively; the single-chip microcomputer control circuit is connected to the transistor relay drive circuit and the motor drive circuit respectively; the transistor relay drive circuit is used to control the electromagnet; and the motor drive circuit is used to drive a permanent magnet brushless DC motor.

[0010] The single-chip microcomputer control circuit includes a single-chip microcomputer, a button, a crystal oscillator circuit X1, a capacitor C1, and a capacitor C2; the two ends of the crystal oscillator circuit X1 are connected to two pins of the single-chip microcomputer, the capacitors C1 and C2 are connected in series and then connected to the two ends of the crystal oscillator circuit X1, and the common end of the capacitors C1 and C2 is grounded; the power end of the single-chip microcomputer is connected to the output voltage of the DC regulated power supply circuit; the output end of the single-chip microcomputer is respectively connected to the resistor R3 and the button; the single-chip microcomputer control circuit sends a signal to the transistor relay drive circuit via the resistor R3 to control the opening or closing of the small hole.

[0011] The transistor driving circuit includes an NPN transistor Q1, a resistor R1, a resistor R2, a diode D1, and a relay RL2; the common end of the resistors R1 and R2 is connected to the base of the NPN transistor Q1, the other end of the resistor R2 is connected to the emitter of the NPN transistor Q1, and the emitter of the NPN transistor Q1 is grounded; the collector of the NPN transistor Q1 is connected to the cathode of the diode D1, the anode of the diode D1 is connected to the DC power supply voltage, and the coils of the relay RL2 are respectively connected to At the positive and negative poles of diode D1, the contacts of relay RL2 are connected in parallel with the electromagnet. When the input signal is high, NPN transistor Q1 is saturated and turned on, the coil of relay RL2 is energized, and the contacts are closed. When the input signal is low, NPN transistor Q1 is turned off, the coil of relay RL2 is de-energized, and the contacts are opened. Diode D1 is connected in parallel with both sides of the relay in reverse, which plays a role of reverse freewheeling and provides a discharge path for the relay coil when NPN transistor Q1 turns from on to off.

[0012] The motor drive circuit uses L298N as the core to control the permanent magnet brushless DC motor. When the pins IN1 and IN2 of L298N are input 1 at the same time, the permanent magnet brushless DC motor stops; when the pins IN1 of L298N are 1 and IN2 are 0, the permanent magnet brushless DC motor rotates clockwise; when the pins IN1 of L298N are 0 and IN2 are 1, the permanent magnet brushless DC motor rotates counterclockwise.

[0013] The DC regulated power supply circuit includes a voltage regulator, a capacitor C3, and a capacitor C4; the capacitor C3 is connected between pin VI and GND of the voltage regulator; the capacitor C4 is connected between pin VO and GND of the voltage regulator; the pin VI of the voltage regulator is used to receive the DC power supply voltage, and the pin VO of the voltage regulator is used to output the voltage.

[0014] Compared with the existing technology, the beneficial effects produced by the present invention are: the present invention uses a motor to drive the fan blades to rotate, sends gas into the pipeline, increases the pressure in the pipeline, and allows the air flow to be quickly discharged after the small hole is opened. Changing the position of the small hole opening can comprehensively clean the visibility meter; the present invention has a reasonable design structure, low cost, energy saving and environmental protection, and meets market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the external structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0018] Figure 3 It is a top view of the present invention.

[0019] Figure 4 The figure is a schematic diagram of the structure of the present invention installed on a visibility meter.

[0020] Figure 5 This is a circuit control diagram of the present invention. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0022] like Figure 1 and 2As shown, an embodiment of the present invention provides a device that can automatically clean cobwebs from a visibility meter. The device is shaped like a long tube and can be fixed to the outside of the visibility meter via a mechanical structure. One end of the device is closed and the other end is open. The tube body has a number of small holes that can be opened and closed. The rotation of the motor at the opening drives the rotation of the fan blades, forming an airflow within the tube, which is discharged to the outside at a relatively fast speed through the small holes, thereby achieving the purpose of cleaning the cobwebs. The specific structure is as follows: the device includes a spider web removal device body 7 installed on the visibility meter 10. The spider web removal device body 7 is a hollow channel. A mesh partition 2 is installed at one end of the channel to prevent foreign objects from entering the permanent magnet brushless DC motor while introducing foreign air into the device. The mesh partition 2 is installed on the channel via a second rotating shaft 5. The other end of the channel is connected to a container 6. A permanent magnet brushless DC motor 4, equipped with fan blades, is installed inside the channel near the mesh partition 2. The motor 4 is mounted within the channel via a first rotating shaft 1. A series of evenly distributed, openable holes 3 are located on one side of the channel between the container 6 and the motor 4. These semicircular holes, controlled by electromagnets, are used to expel gas, utilizing the gas's kinetic energy to clean cobwebs from the visibility meter's surface. The holes' closure is controlled by the rotating shaft and the electromagnets within the container 6. A control circuit board is placed within the container 6, connected to the motor 4. When the device is activated, the motor 4 draws air into the container through the mesh partition 2 and discharges the air through the openable holes 3. The holes 3 open and close one by one from right to left, redirecting the airflow from right to left, cleaning various areas of the visibility meter.

[0023] like Figure 3 As shown, 4 is a permanent magnet brushless DC motor equipped with fan blades, corresponding to Figure 2 Reference numerals 1 and 5 denote a rotating shaft mechanism. When necessary, mesh partition 2 can be opened through 5 to clean the internal motor. The spider web removal device body 7 includes a motor equipped with fan blades for generating airflow within the duct. To minimize the motor's size, reduce noise during operation, and increase its service life and speed, the present invention employs a permanent magnet brushless DC motor. Permanent magnet brushless DC motors offer similar performance to DC motors, but unlike DC motors, they do not require mechanical commutation, are less susceptible to sparking, and offer high reliability, making them widely used in various electronics fields.

[0024] like Figure 4As shown, a connecting structure 9 is provided below the spiderweb removal device body 7, which secures the spiderweb removal device body 7 above a visibility meter 10, with the visibility meter 10 positioned near the aperture 3. A 12V battery and a control circuit board are placed in a container 6, which also serves as a balance. Reference numeral 8 represents a control switch extended by a wire, which facilitates user activation of the device. The connecting structure 9, which connects to the visibility meter 10, is connected to the visibility meter 10 via a rotating shaft structure and magnetic material at its ends. The structure then attaches to the two arms of the visibility meter 10, securing the device to the meter. In practice, the visibility meter's measuring structure should be as close as possible to the aperture so that the gas discharged from the aperture can accurately clear the cobwebs from the visibility meter. Several semicircular apertures are located within the body of the device. When the device is started, the iron sheet outside the small hole will block the small hole under the action of the internal electromagnet. The electromagnet inside the small hole will change its working state in sequence with the passage of time, so that the air flow will be discharged from the small hole in sequence to clean various parts of the visibility meter.

[0025] A button is provided for starting the device. When the button is pressed, the internal control circuit will control several small holes on the tube body to open and close in sequence, and at the same time control the rotation of the motor, thereby driving the rotation of the fan blades, so that the device can complete the cleaning of the spider web with minimal power.

[0026] like Figure 5 As shown, the control circuit board includes a single-chip microcomputer control circuit 11, a transistor relay drive circuit 12, a motor drive circuit 13, and a DC regulated power supply circuit 14. The DC regulated power supply circuit 14 supplies power to the single-chip microcomputer control circuit 11, the transistor relay drive circuit 12, and the motor drive circuit 13. The single-chip microcomputer control circuit 11 is connected to the transistor relay drive circuit 12 and the motor drive circuit 13. The transistor relay drive circuit 12 is used to control the electromagnet; the motor drive circuit 13 is used to drive the permanent magnet brushless DC motor 4. The single-chip microcomputer control circuit 11 receives a start signal from the switch 8 and controls the transistor relay drive circuit 12 and the motor drive circuit 13 to start operation, controlling the sequential opening and closing of the small holes and starting the motor.

[0027] The control circuitry primarily utilizes the STC8051 single-chip microcomputer and its associated circuitry as its core. A transistor relay driver circuit 12 controls the motor drive circuit and the opening and closing of the tube body's apertures. The 8051 single-chip microcomputer is a typical member of the MCS-51 series of single-chip microcomputers and can serve as the system's main controller. Its primary function is to detect key presses and sequentially send high-level signals to the transistor relay driver circuits 12, activating the motor drive circuits. The transistor driver circuit 12 controls the opening and closing of the tube body's apertures and the activation of the motor drive circuit. When the input is high, the relay coils within this circuit are energized, closing the contacts. When the input is low, the relay coils within this circuit are de-energized, opening the contacts. The motor drive circuit 13 primarily drives the motor. When the transistor driver circuit controls the circuit's opening, the motor is powered by a bridge rectifier circuit consisting of four diodes. A DC regulated power supply circuit 14 processes the voltage output from the battery, providing different voltages to the STC8051 single-chip microcomputer and the motor.

[0028] The single-chip microcomputer control circuit 11 includes a single-chip microcomputer, a button, a crystal oscillator circuit X1, a capacitor C1, and a capacitor C2; the two ends of the crystal oscillator circuit X1 are connected to two pins of the single-chip microcomputer, and the capacitors C1 and C2 are connected in series to the two ends of the crystal oscillator circuit X1, and the common end of the capacitors C1 and C2 is grounded; the power end of the single-chip microcomputer is connected to the output voltage of the DC regulated power supply circuit 14; the output end of the single-chip microcomputer is connected to the resistor R3 and the button respectively; the single-chip microcomputer control circuit 11 sends a signal to the transistor relay drive circuit 12 via the resistor R3 to control the opening or closing of the small hole 3. The single-chip microcomputer control circuit 11 is based on the 8051 single-chip microcomputer. The 8051 single-chip microcomputer is a typical product of the MCS-51 series of single-chip microcomputers. It can become the main controller of this system. Its main function is to receive signals from the buttons and send signals to the motor drive circuit 11 through the P1.0 port and the P1.1 port to control the rotation of the motor. At the same time, it controls 7 ports to send signals to the transistor relay drive circuit 12 to control the 7 semicircular holes to open or close in turn.

[0029] The transistor driving circuit 12 includes an NPN transistor Q1, a resistor R1, a resistor R2, a diode D1, and a relay RL2; the common end of the resistor R1 and the resistor R2 is connected to the base of the NPN transistor Q1, the other end of the resistor R2 is connected to the emitter of the NPN transistor Q1, and the emitter of the NPN transistor Q1 is grounded; the collector of the NPN transistor Q1 is connected to the cathode of the diode D1, the anode of the diode D1 is connected to the DC power supply voltage, and the coils of the relay RL2 are connected to The contacts of relay RL2 are connected in parallel to the positive and negative electrodes of diode D1. When the input signal is high, NPN transistor Q1 is saturated and turned on, energizing the relay RL2 coil and closing the contacts. When the input signal is low, NPN transistor Q1 is turned off, de-energizing the relay RL2 coil and opening the contacts. Diode D1 is connected in reverse parallel to both sides of the relay to provide reverse freewheeling, providing a discharge path for the relay coil when NPN transistor Q1 switches from on to off. Transistor relay driver circuit 12 can control the state of the switch according to the signal input from the single-chip microcomputer. This circuit is driven by an NPN transistor. When a high level is input to the base of transistor T1, the transistor is saturated and turned on, and the collector becomes low level, thereby energizing the relay coil and closing the contacts, causing the switch to close. When a low level is input to the base of transistor T1, the transistor is turned off, de-energizing the relay coil, and opening the contacts, causing the switch to open, thereby controlling the opening and closing of the semicircular hole 3.

[0030] The motor drive circuit 13 uses the L298N as its core to control the permanent magnet brushless DC motor 4. When both pins IN1 and IN2 of the L298N are simultaneously set to 1, the permanent magnet brushless DC motor 4 stops; when pins IN1 of the L298N are 1 and IN2 of the L298N are 0, the permanent magnet brushless DC motor 4 rotates clockwise; when pins IN1 of the L298N are 0 and IN2 of the L298N are 1, the permanent magnet brushless DC motor 4 rotates counterclockwise. The motor drive circuit 13 is controlled by the L298N. The STC8051 microcontroller cannot directly drive the motor and requires the assistance of the motor drive circuit. The L298N is a motor driver chip from STMicroelectronics. It features high operating voltage, high output current, strong drive capability, and low heat generation. The motor's operating state can be controlled by changing the two inputs of the L298N. It is simple to operate and has excellent stability.

[0031] The DC regulated power supply circuit 14 includes a voltage regulator, capacitor C3, and capacitor C4. Capacitor C3 is connected between pin VI and GND of the voltage regulator; capacitor C4 is connected between pin VO and GND of the voltage regulator. Pin VI of the voltage regulator is used to receive the DC power supply voltage, and pin VO of the voltage regulator is used to output the voltage. The DC regulated power supply circuit 14 primarily consists of a three-stage voltage regulator 78L05 and its logic components, which can process the 12V power supply voltage into the 5V voltage required by the microcontroller control circuit 11. The DC regulated power supply circuit primarily consists of a three-stage voltage regulator 78L05 and its logic components. The three-stage voltage regulator 78L05 is a fixed-voltage, three-stage integrated voltage regulator that includes a constant current source, a startup circuit, a reference voltage circuit, a sampling, comparison, and amplifier circuit, an adjustment circuit, and current reduction and overheating protection circuits. It features a minimal number of external components, ease of use, stable performance, and low cost. It is suitable for a wide range of applications and can continuously and stably output the power supply voltage required by other circuit structures within the circuit. In the present invention, in order to convert the 12V DC power supply voltage into the 5V voltage required by the single chip microcomputer circuit, a voltage regulated power supply circuit with 78L05 as the core is adopted.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for automatically cleaning spider webs on a visibility meter, characterized in that: The invention comprises a spider web removal device body (7) installed on a visibility meter (10), wherein the spider web removal device body (7) is a hollow channel, a mesh partition (2) is installed at one end of the channel, and the other end of the channel is connected to a container (6), a permanent magnet brushless DC motor (4) is installed inside the channel near the mesh partition (2), and the permanent magnet brushless DC motor (4) is equipped with fan blades; a side of the channel between the container (6) and the permanent magnet brushless DC motor (4) is provided with evenly distributed openable and closable small holes (3); a control circuit board is placed in the container (6), and the control circuit board is connected to the permanent magnet brushless DC motor (4); The permanent magnet brushless DC motor (4) is installed in the channel via a first rotating shaft (1); the mesh partition (2) is installed on the channel via a second rotating shaft (5); A connecting structure (9) is provided below the spider web removal device body (7), and the spider web removal device body (7) is fixed above the visibility meter (10) through the connecting structure (9); and the visibility meter (10) is close to the small hole (3); the small hole (3) is controlled to open and close by an electromagnet, and the small hole (3) is a semicircular small hole for discharging gas, and utilizing the kinetic energy of the gas to achieve the purpose of cleaning the spider web on the surface of the visibility meter; when the device is started, the permanent magnet brushless DC motor (4) introduces the external airflow into the container through the mesh partition (2), and discharges the gas through the openable small hole (3), and the openable small hole (3) is opened and closed one by one from right to left, so that the airflow changes the discharge direction from right to left, and various parts of the visibility meter are cleaned to achieve the purpose of cleaning; The control circuit board comprises a single-chip microcomputer control circuit (11), a transistor relay drive circuit (12), a motor drive circuit (13), and a DC regulated power supply circuit (14); the DC regulated power supply circuit (14) supplies power to the single-chip microcomputer control circuit (11), the transistor relay drive circuit (12), and the motor drive circuit (13); the single-chip microcomputer control circuit (11) is connected to the transistor relay drive circuit (12) and the motor drive circuit (13); the transistor relay drive circuit (12) is used to control the electromagnet; and the motor drive circuit (13) is used to drive the permanent magnet brushless DC motor (4); The single-chip microcomputer control circuit (11) includes a single-chip microcomputer, a button, a crystal oscillator circuit X1, a capacitor C1, and a capacitor C2; the two ends of the crystal oscillator circuit X1 are connected to two pins of the single-chip microcomputer, the capacitors C1 and C2 are connected in series and then connected to the two ends of the crystal oscillator circuit X1, and the common end of the capacitors C1 and C2 is grounded; the power supply end of the single-chip microcomputer is connected to the output voltage of the DC regulated power supply circuit (14); the output end of the single-chip microcomputer is respectively connected to the resistor R3 and the button; the single-chip microcomputer control circuit (11) sends a signal to the transistor relay drive circuit (12) via the resistor R3 to control the opening or closing of the small hole (3); The transistor relay drive circuit (12) comprises an NPN transistor Q1, a resistor R1, a resistor R2, a diode D1, and a relay RL2; the common end of the resistor R1 and the resistor R2 is connected to the base of the NPN transistor Q1, the other end of the resistor R2 is connected to the emitter of the NPN transistor Q1, and the emitter of the NPN transistor Q1 is grounded; the collector of the NPN transistor Q1 is connected to the negative electrode of the diode D1, the positive electrode of the diode D1 is connected to the DC power supply voltage, the coil of the relay RL2 is connected to the positive and negative electrodes of the diode D1 respectively, and the contacts of the relay RL2 are connected in parallel with the electromagnet; when the input signal is high, the NPN transistor Q1 is saturated and turned on, the coil of the relay RL2 is energized, and the contacts are attracted; when the input signal is low, the NPN transistor Q1 is turned off, the coil of the relay RL2 is de-energized, and the contacts are opened; the diode D1 is connected in reverse parallel to both sides of the relay to play a role of reverse freewheeling.

2. The device for automatically cleaning spider webs on a visibility meter according to claim 1, characterized in that: The motor drive circuit (13) uses L298N as the core to control the permanent magnet brushless DC motor (4). When the pins IN1 and IN2 of the L298N are simultaneously input with 1, the permanent magnet brushless DC motor (4) is stopped; when the pins IN1 of the L298N are 1 and IN2 are 0, the permanent magnet brushless DC motor (4) rotates clockwise; when the pins IN1 of the L298N are 0 and IN2 are 1, the permanent magnet brushless DC motor (4) rotates counterclockwise.

3. The device for automatically cleaning spider webs on a visibility meter according to claim 2, characterized in that: The DC regulated power supply circuit (14) comprises a voltage stabilizer, a capacitor C3, and a capacitor C4; the capacitor C3 is connected between pin VI and GND of the voltage stabilizer; the capacitor C4 is connected between pin VO and GND of the voltage stabilizer; the pin VI of the voltage stabilizer is used to receive a DC power supply voltage, and the pin VO of the voltage stabilizer is used to output a voltage.

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