Air flow detection sensor and electronic equipment

Abstract

The utility model provides an air flow detection sensor and electronic equipment. The air flow detection sensor comprises an electric signal output module, a rectification module, a charge storage module, a voltage stabilization module and a comparator module, the external fan blade, the electric signal output module, the rectifier module, the charge storage module, the voltage stabilizing module, the comparator module and the external indicator lamp are connected in sequence, and the charge storage module is further connected with the comparator module; the electric signal output module enables the coil to cut the magnetic field of the magnet based on the rotating fan blade, and outputs an electric signal through the coil; the rectifier module rectifies the electric signal; the charge storage module stores the rectified electric signal and outputs a power supply voltage; the voltage stabilization module carries out voltage stabilization processing on the power supply voltage to obtain a reference voltage; and the comparator module outputs a control signal to the indicator lamp based on the reference voltage and the divided power supply voltage, so that the indicator lamp is lightened or flickers based on the control signal. The device is small in size, low in price and high in universality and practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a sensor and electronic equipment for wind flow detection. Background Art

[0002] The wind speed and direction measuring instruments on the market can measure the wind speed in nature or in a certain area, but the equipment is relatively large and expensive. Therefore, there is no miniaturized wind flow detection sensor on the market. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a sensor and electronic equipment for wind flow detection, which does not require additional power supply or battery power supply, is small in size, low in price, and has high versatility and practicality.

[0004] In the first aspect, an embodiment of the utility model provides a sensor for wind flow detection, which includes: an electrical signal output module, a rectifier module, a charge storage module, a voltage stabilizing module and a comparator module; the external fan blades, the electrical signal output module, the rectifier module, the charge storage module, the voltage stabilizing module, the comparator module and the external indicator light are connected in sequence, and the charge storage module is also connected to the comparator module; the electrical signal output module is used to cut the magnetic field between the coil and the magnet based on the rotating fan blades, and output the electrical signal through the coil; the rectifier module is used to rectify the electrical signal; the charge storage module is used to store the rectified electrical signal and output the power supply voltage; the voltage stabilizing module is used to stabilize the power supply voltage to obtain a reference voltage; the comparator module is used to output a control signal to the indicator light based on the reference voltage and the divided power supply voltage, so that the indicator light is lit or flashes based on the control signal.

[0005] In an optional embodiment of the present application, if the supply voltage is greater than a reference voltage, the control signal is used to light up the indicator light in a first color; if the supply voltage is less than the reference voltage, the control signal is used to light up the indicator light in a second color; if the supply voltage is less than a preset voltage threshold, the control signal is used to make the indicator light flash; wherein the voltage threshold is less than the reference voltage.

[0006] In an optional embodiment of the present application, the above-mentioned rectification module includes at least one diode, and the at least one diode is used to rectify the electrical signal.

[0007] In an optional embodiment of the present application, the charge storage module includes at least one capacitor, and the at least one capacitor is used to store the rectified electrical signal and output the supply voltage.

[0008] In an optional embodiment of the present application, the above-mentioned comparator module includes a comparator, and multiple resistors are arranged between the comparator and the power supply voltage and the charge storage module; the multiple resistors are used to divide the power supply voltage; the comparator is used to output a control signal to the indicator light based on the reference voltage and the divided power supply voltage.

[0009] In an optional embodiment of the present application, the above-mentioned voltage stabilizing module includes a resistor and a voltage stabilizing diode; the resistor and the voltage stabilizing diode are used to stabilize the power supply voltage to obtain a reference voltage.

[0010] In an optional embodiment of the present application, the above-mentioned wind flow detection sensor is arranged at the central stator position of the fan blade, and the wind flow detection sensor is connected to the indicator light through a signal line, and the indicator light is arranged on the outer shell surface of the electronic device.

[0011] In an optional embodiment of the present application, the above-mentioned wind flow detection sensor is implemented by an analog circuit.

[0012] In an optional embodiment of the present application, the above-mentioned infrared pair of tubes is irradiated on the blades of the fan blade; the single-chip microcomputer chip is used to determine the square wave frequency that characterizes the rotation speed of the blade, and processes the square wave frequency into a digital signal; the device host is used to obtain the square wave frequency, and determine the wind flow of the fan blade based on the square wave frequency.

[0013] In a second aspect, an embodiment of the utility model further provides an electronic device, which includes: a fan blade, an indicator light and the above-mentioned wind flow detection sensor, and the fan blade, the wind flow detection sensor and the indicator light are connected in sequence.

[0014] The embodiments of the present invention bring the following beneficial effects:

[0015] The embodiment of the utility model provides a sensor and electronic device for wind flow detection, wherein an external fan blade, an electric signal output module, a rectifier module, a charge storage module, a voltage stabilizing module, a comparator module and an external indicator light are connected in sequence, and the charge storage module is also connected to the comparator module; the electric signal output module is used to cut the magnetic field of the coil and the magnet based on the rotating fan blade, and output the electric signal through the coil; the rectifier module is used to rectify the electric signal; the charge storage module is used to store the rectified electric signal and output the power supply voltage; the voltage stabilizing module is used to stabilize the power supply voltage to obtain a reference voltage; the comparator module is used to output a control signal to the indicator light based on the reference voltage and the divided power supply voltage, so that the indicator light is lit or flashes based on the control signal. No additional power supply or battery power supply is required, the size is small, the price is low, and it has high versatility and practicality.

[0016] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0017] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a sensor for wind flow detection provided by an embodiment of the utility model;

[0020] Figure 2 A circuit diagram of an electrical signal output module, a rectifier module and a charge storage module provided in an embodiment of the utility model;

[0021] Figure 3 A circuit diagram of a comparator module provided by an embodiment of the utility model;

[0022] Figure 4 A circuit diagram of a voltage stabilizing module provided in an embodiment of the utility model;

[0023] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the utility model.

[0024] Icons: 10- wind flow detection sensor; 1- electrical signal output module; 2- rectifier module; 3- charge storage module; 4- voltage regulator module; 5- comparator module; 20- fan blade; 30- indicator light; 100- electronic equipment. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] At present, the wind speed and direction measuring instruments on the market can measure the wind speed in nature or a certain area, but the equipment is relatively large and expensive. Therefore, there is no miniaturized wind flow detection sensor on the market.

[0027] Based on this, the embodiment of the utility model provides a sensor and electronic device for wind flow detection, which detects the wind flow passing through a unit area, has a certain protective and auxiliary effect on the main electrical appliance, and can be used for assisting, protecting, alarming and fault prompting of equipment with blowing and inhaling air.

[0028] To facilitate understanding of this embodiment, a sensor for detecting wind flow rate disclosed in an embodiment of the utility model is first introduced in detail.

[0029] Embodiment 1:

[0030] The utility model provides a sensor for detecting wind flow rate. Figure 1 The structure diagram of a sensor for wind flow detection shown in the figure, the wind flow detection sensor 10 comprises: an electrical signal output module 1, a rectifier module 2, a charge storage module 3, a voltage stabilizing module 4 and a comparator module 5;

[0031] The external fan blade 20, the electric signal output module 1, the rectifier module 2, the charge storage module 3, the voltage stabilizing module 4, the comparator module 5 and the external indicator light 30 are connected in sequence, and the charge storage module 3 is also connected to the comparator module 5;

[0032] The electrical signal output module is used to cut the magnetic field of the coil and the magnet based on the rotating wind blades, and output the electrical signal through the coil; the rectifier module is used to rectify the electrical signal; the charge storage module is used to store the rectified electrical signal and output the supply voltage; the voltage regulator module is used to stabilize the supply voltage to obtain a reference voltage; the comparator module is used to output a control signal to the indicator light based on the reference voltage and the divided supply voltage, so that the indicator light is lit or flashes based on the control signal.

[0033] When the external fan blades rotate, the coil of the electrical signal output module cuts the magnetic field of the magnet, and the coil can output current and voltage as electrical signals. The electrical signal output by the electrical signal output module can be rectified by the rectifier module, and the rectified electrical signal can be stored by the charge storage module.

[0034] The charge storage module can also output a supply voltage, which can be stabilized by the voltage regulator module. The stabilized supply voltage is called a reference voltage, which can power subsequent circuits. The comparator module has a reference voltage and a supply voltage as inputs, and outputs a control signal for an external indicator light.

[0035] In some embodiments, the sensor for wind flow detection is implemented by an analog circuit. Based on the principle that the more and faster the wind flows through the fan blades, the higher the voltage generated, a comparator module is used to compare the stabilized reference voltage with the supply voltage, thereby generating different control signals. Different control signals can make the indicator light up in different colors or flash.

[0036] In some embodiments, if the supply voltage is greater than a reference voltage, the control signal is used to light up the indicator light in a first color; if the supply voltage is less than the reference voltage, the control signal is used to light up the indicator light in a second color; if the supply voltage is less than a preset voltage threshold, the control signal is used to make the indicator light flash; wherein the voltage threshold is less than the reference voltage.

[0037] For example, the indicator light can be an LED (Light-Emitting Diode). When the power supply voltage is higher than the reference voltage, the control signal can make the LED light light up green (i.e., the first color), indicating that the equipment is operating normally; when the power supply voltage is lower than the reference voltage, the control signal can make the LED light light up red (i.e., the second color), indicating that the wind flow rate is too low, prompting the user to clean the equipment; when the power supply voltage is extremely low (i.e., less than a preset voltage threshold, and the voltage threshold is less than the reference voltage), it indicates that the power supply voltage cannot maintain the line operation, and the LED light is in a flashing state, prompting the user that the equipment has failed and needs to be checked and cleaned.

[0038] In addition, the output signal of the LED light can also be supplied to the main board of the device to reflect the current wind flow status.

[0039] The embodiment of the utility model provides a sensor for wind flow detection, wherein an external fan blade, an electric signal output module, a rectifier module, a charge storage module, a voltage stabilizing module, a comparator module and an external indicator light are connected in sequence, and the charge storage module is also connected to the comparator module; the electric signal output module is used to cut the magnetic field of the coil and the magnet based on the rotating fan blade, and output the electric signal through the coil; the rectifier module is used to rectify the electric signal; the charge storage module is used to store the rectified electric signal and output the power supply voltage; the voltage stabilizing module is used to stabilize the power supply voltage to obtain a reference voltage; the comparator module is used to output a control signal to the indicator light based on the reference voltage and the divided power supply voltage, so that the indicator light is lit or flashes based on the control signal. No additional power supply or battery power supply is required, the size is small, the price is low, and it has high versatility and practicality.

[0040] Embodiment 2:

[0041] An embodiment of the utility model provides another sensor for detecting wind flow rate. In some embodiments, the rectifier module includes at least one diode, and the at least one diode is used to rectify the electrical signal.

[0042] See also Figure 2 The circuit diagram of an electrical signal output module, a rectifier module and a charge storage module is shown. After the wind blades rotate, the electrical signal generated by the electrical signal output module can be rectified by diodes D1, D2, D3 and D4 of the rectifier module.

[0043] In some embodiments, the charge storage module includes at least one capacitor, and the at least one capacitor is used to store the rectified electrical signal and output the supply voltage.

[0044] like Figure 2 As shown, the capacitors C1 and C2 of the charge storage module can store energy for filtering and output a DC power supply voltage VCC, and the power supply voltage VCC can supply power to the comparator U1.

[0045] In some embodiments, the above-mentioned comparator module includes a comparator, and multiple resistors are arranged between the comparator, the power supply voltage and the charge storage module; the multiple resistors are used to divide the power supply voltage; the comparator is used to output a control signal to the indicator light based on the reference voltage and the divided power supply voltage.

[0046] See also Figure 3 In the circuit diagram of a comparator module shown in FIG. 1 , a supply voltage VCC can be input into the comparator U1 of the comparator module after being divided by resistors R4 and R5 .

[0047] In some embodiments, the voltage stabilization module includes a resistor and a voltage stabilizing diode; the resistor and the voltage stabilizing diode are used to stabilize the supply voltage to obtain a reference voltage.

[0048] See also Figure 4 In the circuit diagram of a voltage stabilizing module shown in FIG. 1 , the supply voltage VCC can be stabilized by the resistor R1 and the voltage stabilizing diode U2 of the voltage stabilizing module to obtain a reference voltage Refer. The reference voltage Refer is also input into the comparator U1 of the comparator module.

[0049] like Figure 3 As shown, the comparator U1 can compare the reference voltage Refer and the voltage after the power supply voltage VCC is divided. If the voltage after the VCC is divided is higher than the reference voltage Refer, the LED light can light up green; if the voltage after the VCC is divided is lower than the reference voltage Refer, the LED light can light up red.

[0050] In some embodiments, a sensor for detecting wind flow rate is disposed at a central stator position of a fan blade, and the sensor for detecting wind flow rate is connected to an indicator light via a signal line, and the indicator light is disposed on a housing surface of the electronic device.

[0051] The wind flow rate sensor in this embodiment can be arranged at the central stator position of the fan blade of the electronic device, and the wind flow rate sensor is connected to the indicator light arranged on the shell surface of the electronic device through a signal line. For example, the wind flow rate sensor in this embodiment can also be arranged at the tail of a household hair dryer.

[0052] The use parameters of the sensor for wind flow detection in this embodiment are verified in this embodiment: when the wind cylinder is rotated normally, the output is a sinusoidal waveform under the cutting of the magnetic field of the coil and the magnet, the peak value of the output is 11.6V, the frequency is 318Hz, and the output current is 2.26mA / AC.

[0053] In addition, this embodiment also simulates the situation where the air flow rate is reduced when the protective cover of the hair dryer is blocked by hair, dust, or foreign matter. The peak value of the output is 10.3V, the frequency is 271Hz, and the output current is 0.56mA / AC.

[0054] In summary, the output voltage and current signals of the hair dryer are different when it is in normal use and when it is blocked by foreign objects. After adding electronic circuit processing, it can be reflected by red and green LED lights. Therefore, whether in theory or experimental practice, the air flow detection sensor of this embodiment can achieve the purpose of detecting the size of the air flow.

[0055] In some embodiments, an infrared tube is irradiated on the blades of the fan blade; the single-chip microcomputer chip is used to determine the square wave frequency representing the rotation speed of the blade, and processes the square wave frequency into a digital signal; the device host is used to obtain the square wave frequency, and determine the wind flow of the fan blade based on the square wave frequency.

[0056] The air flow rate sensor of this embodiment can be realized by analog circuit. This embodiment can also add digital circuit to the original basis to realize data transmission: add a single-chip microcomputer chip and infrared tube, and the infrared tube irradiates the blade. The single-chip microcomputer chip determines the square wave frequency when the fan blade rotates. This square wave frequency is the rotation speed of the blade. The single-chip microcomputer can process the square wave frequency into a digital signal, and the single-chip microcomputer transmits it to the device host through the I2C bus or serial communication mode, so that the device host can monitor the air flow at all times.

[0057] In addition, for the above air flow detection sensor, only two voltage-dividing resistors need to be modified to reset the alarm threshold of the air flow, which is convenient for modifying the corresponding appropriate value according to the purpose of the equipment or the need, and has the characteristics of strong flexibility in use. In addition, the size of the fan blade can be re-modified according to the space size of the equipment, so that it is convenient and quick to equip.

[0058] The sensor for wind flow detection provided by the embodiment of the utility model does not require additional power supply or battery power supply, is easy to install, and has certain versatility and practicality.

[0059] For example: when a user uses a hair dryer at home, after using it for a long time, hair and dust will be blocked on the protective net and the wind blades. At this time, the wind blown out will become smaller and overheat, thereby reducing the user experience. However, most users will not detect what the problem is and will continue to use it.

[0060] This will not only further reduce the user experience, but also shorten the life of the device. If a sensor for detecting the air flow rate provided in this embodiment is installed at the tail of the hair dryer, the sensor for detecting the air flow rate can detect whether the air blown out is within a normal value. If the air flow rate is normal, a green light will be on; if the air flow rate is too low, a red light will be on or off, which is equivalent to reminding the user to clean the hair, dust and other debris in the hair dryer. After cleaning, the hair dryer can be used normally again.

[0061] Similarly, the above-mentioned wind flow detection sensor provided in the embodiment of the utility model can also be used in equipment for blowing or sucking air, such as vacuum cleaners, exhaust fans, air conditioners, heat dissipation and blowing equipment, etc.

[0062] Embodiment three:

[0063] The utility model embodiment provides an electronic device, see Figure 5 The structural schematic diagram of an electronic device shown in the figure, the electronic device 100 comprises: a fan blade 20, an indicator light 30 and a sensor 10 for wind flow detection provided in the aforementioned embodiment, and the fan blade 20, the sensor 10 for wind flow detection and the indicator light 30 are connected in sequence.

[0064] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the electronic device described above can refer to the corresponding process in the embodiment of the aforementioned wind flow detection sensor, and will not be repeated here.

[0065] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0067] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above-mentioned embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A sensor for detecting wind flow, characterized in that: The sensor for wind flow detection includes: an electrical signal output module, a rectifier module, a charge storage module, a voltage stabilization module and a comparator module; The external fan blades, the electrical signal output module, the rectifier module, the charge storage module, the voltage stabilizing module, the comparator module and the external indicator light are connected in sequence, and the charge storage module is also connected to the comparator module; The electrical signal output module is used to output an electrical signal through the coil by cutting the magnetic field of the coil and the magnet based on the rotating wind blade; The rectifier module is used to rectify the electrical signal; The charge storage module is used to store the rectified electrical signal and output a supply voltage; The voltage stabilization module is used to stabilize the supply voltage to obtain a reference voltage; The comparator module is used to output a control signal to the indicator light based on the reference voltage and the divided supply voltage, so that the indicator light is lit or flashes based on the control signal.

2. The sensor for detecting wind flow rate according to claim 1, characterized in that: If the supply voltage is greater than the reference voltage, the control signal is used to make the indicator light up in a first color; If the supply voltage is less than the reference voltage, the control signal is used to make the indicator light up in a second color; If the supply voltage is less than a preset voltage threshold, the control signal is used to make the indicator light flash; wherein the voltage threshold is less than the reference voltage.

3. The sensor for detecting wind flow rate according to claim 1, characterized in that: The rectifying module includes at least one diode, and the at least one diode is used to rectify the electrical signal.

4. The sensor for detecting wind flow rate according to claim 1, characterized in that: The charge storage module includes at least one capacitor, and the at least one capacitor is used to store the rectified electrical signal and output a supply voltage.

5. The sensor for detecting wind flow rate according to claim 1, characterized in that: The comparator module comprises a comparator, wherein a plurality of resistors are arranged between the comparator, the supply voltage and the charge storage module; the plurality of resistors are used to divide the supply voltage; The comparator is used to output a control signal to the indicator light based on the reference voltage and the divided supply voltage.

6. The sensor for detecting wind flow rate according to claim 1, characterized in that: The voltage stabilizing module includes a resistor and a voltage stabilizing diode; The resistor and the voltage stabilizing diode are used to stabilize the supply voltage to obtain a reference voltage.

7. The sensor for detecting wind flow rate according to any one of claims 1 to 6, characterized in that: The wind flow rate detection sensor is arranged at the central stator position of the fan blade, and the wind flow rate detection sensor is connected to the indicator light through a signal line, and the indicator light is arranged on the outer shell surface of the electronic device.

8. The wind flow rate detection sensor according to any one of claims 1 to 6, characterized in that: The sensor for detecting the wind flow rate is implemented through an analog circuit.

9. The sensor for detecting wind flow rate according to any one of claims 1 to 6, characterized in that: The infrared tube irradiates the blades of the wind blade; The single-chip microcomputer chip is used to determine the square wave frequency representing the rotation speed of the blade, and process the square wave frequency into a digital signal; The device host is used to obtain the square wave frequency and determine the wind flow of the fan blade based on the square wave frequency.

10. An electronic device, characterized in that: The electronic device comprises: a fan blade, an indicator light and a sensor for detecting wind flow rate according to any one of claims 1 to 9, and the fan blade, the sensor for detecting wind flow rate and the indicator light are connected in sequence.

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