Detection circuit based on electronic cigarette and electronic cigarette
By combining the capacitive detection module and the main control module, the problem of high cost of the head detection chip in electronic cigarette products is solved, low-cost suction action detection is achieved, and the reliability and stability of the electronic cigarette products are improved.
Patent Information
- Application Number
- CN202421894053.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-06
AI Technical Summary
Among existing electronic cigarette products, the cost of detecting suction actions through the microphone detection chip is high, resulting in an increase in hardware costs.
The capacitive detection module and the main control module are adopted to output the oscillation frequency by changing the capacitance value. Combined with the counting unit and the control unit, the suction detection result is determined, and the dependence on the special micro-head detection chip is reduced.
The cost of suction action detection is reduced, and the overall cost of electronic cigarette products is reduced, while improving the reliability and stability of detection.
Smart Images
Figure CN223067963U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of detection circuits, and particularly to a detection circuit and an electronic cigarette based on an electronic cigarette. Background Art
[0002] In electronic cigarette products, detecting the puffing action is one of the most basic functions. The puffing action will cause a change in air flow. There is a capacitive microphone inside the electronic cigarette, and the capacitance value of the microphone changes with the change in air flow. Thus, the puffing action can be detected by detecting the capacitance change of the microphone. In related technologies, detecting the puffing action according to the capacitance change is mainly achieved through a dedicated microphone detection chip. After the puffing action is detected by the microphone detection chip, the signal corresponding to the puffing action is sent to the main control chip. However, setting a microphone detection chip in the electronic cigarette product to detect the puffing action has a relatively high detection cost, thus increasing the hardware cost of the entire electronic cigarette product.
[0003] Therefore, how to reduce the detection cost of the puffing action and lower the cost of the electronic cigarette product has become a technical problem to be solved urgently. Summary of the Utility Model
[0004] The main purpose of the embodiments of this application is to propose a detection circuit and an electronic cigarette based on an electronic cigarette, aiming to reduce the detection cost of the puffing action and lower the cost of the electronic cigarette product.
[0005] To achieve the above purpose, a first aspect of the embodiments of this application proposes a detection circuit based on an electronic cigarette. The detection circuit includes: a capacitive detection module and a main control module. The main control module includes an oscillation unit, a counting unit, and a control unit;
[0006] The oscillation unit is electrically connected to the capacitive detection module, and the counting unit is electrically connected to the oscillation unit and the main control module;
[0007] When the air flow changes, the capacitance value of the capacitive detection module changes; the oscillation unit is used to output a corresponding oscillation frequency when the capacitance value of the capacitive detection module changes; the counting unit is used to detect the oscillation frequency output by the main control module to obtain a target operating frequency; the control unit is used to determine the puffing detection result according to the target operating frequency and a preset oscillation frequency.
[0008] In some embodiments, the control unit is further used to collect multiple target operating frequencies detected by the counting unit, and calculate the number of times that the multiple target operating frequencies are greater than the preset oscillation frequency. If the number of times is greater than or equal to a preset threshold, it is determined that the puffing detection result is that a puffing action has occurred. If the number of times is less than the preset threshold, it is determined that the puffing detection result is no puffing action.
[0009] In some embodiments, the main control module includes at least one main control chip and at least one peripheral unit, and the oscillation unit, the counting unit, and the control unit are integrated in one of the main control chips;
[0010] The capacitive detection module includes a first microphone. If there is one main control chip and one peripheral unit, the main control chip is the first chip, and the peripheral unit is the first peripheral unit. The first peripheral unit includes a first capacitor, a first MOS transistor, a first resistor, a second resistor, and a third resistor;
[0011] The first chip is electrically connected to the first microphone, the first resistor, the first capacitor, and the gate of the first MOS transistor. The second resistor is electrically connected to the drain and the gate of the first MOS transistor. The third resistor is electrically connected to the first MOS transistor;
[0012] The first microphone is used to detect the airflow change and output a first detection signal. The first chip outputs a corresponding oscillation frequency according to the first detection signal to obtain a first oscillation frequency, and determines the suction detection result according to the first oscillation frequency.
[0013] In some embodiments, the detection circuit further includes a charging protection module and a regulated power supply module;
[0014] The charging protection module is electrically connected to the regulated power supply module and an external power supply, and the regulated power supply module is electrically connected to the main control module;
[0015] The charging protection module has a conducting state or a disconnecting state. The charging protection module is used to detect the current of the regulated power supply module to obtain a first current, and when the first current is greater than or equal to a preset battery current threshold, it switches from the conducting state to the disconnecting state.
[0016] In some embodiments, the detection circuit further includes a first indicator light module, a second indicator light module, and a heating module;
[0017] The first indicator light module is electrically connected to the charging protection module, the second indicator light module is electrically connected to the main control module, and the heating module is electrically connected to the main control module;
[0018] The first indicator light module is used to indicate the state of the charging protection module; the main control module detects the current of the heating module, obtains a second current, and sends a lighting control signal according to the second current; the second indicator light module switches the lighting state according to the lighting control signal.
[0019] In some embodiments, the charging protection module includes an interface sub-module, a second chip, a third chip, a fourth chip, a fuse, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, and a tenth resistor;
[0020] The interface sub-module is electrically connected to the fuse, the fourth resistor, and the fifth resistor. The second chip is electrically connected to the fuse, the third chip, the sixth resistor, and the third capacitor. The sixth resistor is electrically connected to the second capacitor. The third chip is electrically connected to the eighth resistor, the ninth resistor, and the tenth resistor. The fourth chip is electrically connected to the second chip, the third chip, the fourth capacitor, the fifth capacitor, the fourth resistor, the fifth resistor, the seventh resistor, the tenth resistor, the interface sub-module, and the regulated power supply module;
[0021] The interface sub-module is used to connect to the external power supply for charging. The third chip is used for voltage conversion. The fourth chip obtains the test voltage of the regulated power supply module. If the test voltage is greater than or equal to a preset voltage threshold, the fourth chip switches to an off state.
[0022] In some embodiments, the first indicator light module includes a first diode and a fourteenth resistor, and the second indicator light module includes a second diode, a third diode, and a fifteenth resistor;
[0023] The input end of the first diode is electrically connected to the fourteenth resistor, and the output end of the first diode is electrically connected to the fourth chip;
[0024] The fifteenth resistor is electrically connected to the output end of the second diode and the input end of the third diode, and the output end of the third diode is electrically connected to the first chip.
[0025] In some embodiments, the second indicator light module further includes a fourth diode. If there are two main control chips, the two main control chips are the first chip and the fifth chip respectively;
[0026] The input end of the fourth diode is electrically connected to the fifteenth resistor, and the output end of the fourth diode is electrically connected to the fifth chip;
[0027] The fifth chip controls the fourth diode to switch the light-emitting state.
[0028] In some embodiments, the regulated power supply module has multiple reference voltages, and the regulated power supply module includes a battery unit;
[0029] The voltage-stabilizing power supply module is used to provide the reference voltage and perform voltage conversion on the voltage obtained by the charging protection module so as to charge the battery unit.
[0030] To achieve the above-mentioned purpose, a second aspect of an embodiment of the present application provides an electronic cigarette, wherein the electronic cigarette includes the electronic cigarette-based detection circuit described in the first aspect.
[0031] The electronic cigarette detection circuit and electronic cigarette proposed in this application have a capacitance value of a capacitive detection module that changes when the airflow changes; a main control module is used to output a corresponding oscillation frequency when the capacitance value of the capacitive detection module changes, the oscillation frequency is detected to obtain a target operating frequency, and the puff detection result is determined based on the target operating frequency and the preset oscillation frequency. Therefore, this application only uses a capacitive detection module and a main control module to detect the puff action, and there is no need to set up a microphone detection chip, which can reduce the detection cost of the puff action and reduce the cost of electronic cigarette products. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a module block diagram of an electronic cigarette-based detection circuit provided in an embodiment of the present application;
[0033] Figure 2 is a circuit schematic diagram of a main control module provided in an embodiment of the present application;
[0034] Figure 3 is a circuit schematic diagram of a main control module provided in another embodiment of the present application;
[0035] Figure 4 is a module block diagram of a detection circuit based on an electronic cigarette provided in another embodiment of the present application;
[0036] Figure 5 is a module block diagram of a detection circuit based on an electronic cigarette provided in another embodiment of the present application;
[0037] Figure 6 is a circuit schematic diagram of a charging protection module provided in an embodiment of the present application;
[0038] Figure 7A is a circuit schematic diagram of a first indicator light module provided in an embodiment of the present application;
[0039] Figure 7B This is a circuit schematic diagram of a second indicator light module provided in one embodiment of the present application. DETAILED DESCRIPTION
[0040] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0041] It should be noted that although the functional modules are divided in the device schematic diagram and the logical sequence is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order from the module division in the device or the sequence in the flowchart. Terms such as "first" and "second" in the specification, claims and the above-mentioned drawings are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence.
[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.
[0043] First, several nouns involved in this application are analyzed:
[0044] The microphone is an airflow detection device that can be set inside the electronic cigarette. The conductive film of the microphone and the substrate can form a capacitor, and the capacitance value changes with the change of the airflow direction. The conductive film of the microphone is very thin, so even a weak airflow change will cause fluctuations in the capacitance value of the microphone.
[0045] LDO (Low-dropout regulator), also known as a low-dropout linear regulator or a low-drop voltage regulator, is a linear DC voltage regulator used to provide a stable DC voltage power supply.
[0046] IFC (Internal Frequency Converter) is used to convert the frequency of the current.
[0047] The detection circuit based on the electronic cigarette and the electronic cigarette provided by the embodiments of this application will be specifically described through the following embodiments. First, the detection circuit based on the electronic cigarette in the embodiments of this application is described.
[0048] Figure 1 It is an optional module block diagram of the detection circuit based on the electronic cigarette provided by the embodiments of this application. The detection circuit includes: a capacitive detection module 10 and a main control module 20. The main control module 20 includes an oscillation unit 21, a counting unit 22, and a control unit 23;
[0049] The oscillation unit 21 is electrically connected to the capacitive detection module 10, and the counting unit 22 is electrically connected to the oscillation unit 21 and the main control module;
[0050] When the air flow changes, the capacitance value of the capacitive detection module 10 changes; the oscillation unit 21 is configured to output a corresponding oscillation frequency when the capacitance value of the capacitive detection module 10 changes; the counting unit 22 is configured to detect the oscillation frequency output by the main control module 20 to obtain the target operating frequency; the control unit 23 is configured to determine the suction detection result according to the target operating frequency and the preset oscillation frequency.
[0051] Specifically, the capacitive detection module 10 may be a microphone, and the microphone can accurately output the change of the capacitance value. The capacitive detection module 10 may also be other air flow sensors, and the embodiments of the present application do not limit this.
[0052] The beneficial effects of the embodiments of the present application include but are not limited to: when the air flow changes, the capacitance value of the capacitive detection module 10 changes; by using the main control module 20, when the capacitance value of the capacitive detection module 10 changes, a corresponding oscillation frequency is output, the oscillation frequency is detected to obtain the target operating frequency, and the suction detection result is determined according to the target operating frequency and the preset oscillation frequency. Therefore, the present application only uses the capacitive detection module 10 and the main control module 20 to implement the detection of the suction action, without setting a dedicated microphone detection chip, which can reduce the detection cost of the suction action and reduce the cost of the electronic cigarette product.
[0053] In some embodiments, the control unit 23 is further configured to collect multiple target operating frequencies detected by the counting unit, and calculate the number of times that the multiple target operating frequencies are greater than the preset oscillation frequency. If the number of times is greater than or equal to the preset threshold, it is determined that the suction detection result is that a suction action occurs; if the number of times is less than the preset threshold, it is determined that the suction detection result is that no suction action occurs.
[0054] The advantage of this embodiment is that through multiple detections by the counting unit, multiple target operating frequencies are detected, and then the target operating frequencies are compared with the preset oscillation frequency multiple times. After the number of times that the multiple target operating frequencies are greater than the preset oscillation frequency is greater than or equal to the preset threshold, it is determined that the suction detection result is that a suction action occurs, thereby avoiding false touches of the suction action and being able to exclude false touches caused by external factors or circuit fluctuations.
[0055] Specifically, the preset threshold may be 5 times or 10 times, and the preset threshold is not limited here and can be adjusted according to the usage situation of the electronic cigarette.
[0056] Please refer to Figure 1 and Figure 2 , in some embodiments, the main control module 20 includes at least one main control chip (not shown in the figure) and at least one peripheral unit (not shown in the figure), and the oscillation unit 21, the counting unit 22 and the control unit 23 are integrated in one main control chip;
[0057] The capacitive detection module 10 includes a first microphone MIC1. If there is one main control chip and one peripheral unit, the main control chip is the first chip U1 and the peripheral unit is the first peripheral unit. The first peripheral unit includes a third capacitor C3, a first MOS transistor Q1, a first resistor R1, a second resistor R2, and a third resistor R3.
[0058] The first chip U1 is electrically connected to the first microphone MIC1, the first resistor R1, the third capacitor C3, and the gate of the first MOS transistor Q1. The second resistor R2 is electrically connected to the drain and the gate of the first MOS transistor Q1. The third resistor R3 is electrically connected to the source of the first MOS transistor Q1.
[0059] The first microphone MIC1 is used to detect the airflow change and output a first detection signal. The first chip U1 outputs a corresponding oscillation frequency based on the first detection signal to obtain a first oscillation frequency, and determines the suction detection result according to the first oscillation frequency.
[0060] The advantage of this embodiment is that the first chip U1 in the main control chip outputs a corresponding oscillation frequency when the capacitance value of the capacitive detection module 10 changes, detects the oscillation frequency to obtain the target operating frequency, and determines the suction detection result according to the target operating frequency and the preset oscillation frequency. Therefore, this application only uses the capacitive detection module 10 and the main control module 20 to realize the detection of the suction action, without setting a dedicated microphone detection chip, which can reduce the detection cost of the suction action and lower the cost of the electronic cigarette product.
[0061] It should be noted that the first chip U1 generates a vibration frequency when powered on. When the first microphone MIC1 detects the airflow change, it outputs a first detection signal. The vibration frequency generated by the first chip U1 is different from the oscillation frequency when no first detection signal is received.
[0062] It should be noted that the third resistor R3 is electrically connected to the source of the first MOS transistor Q1. The drain of the first MOS transistor Q1 is electrically connected to the regulated power supply module 30, and the source of the first MOS transistor Q1 is electrically connected to the heating module 70.
[0063] It should be noted that in Figure 2 , VBAT represents the regulated power supply terminal, and the regulated power supply terminal is electrically connected to the regulated power supply module 30 (such as Figure 5 ). H2+ represents the heating terminal, and the heating terminal is electrically connected to the heating module 70 (such as Figure 5 ). The LED1 port is electrically connected to the first indicator module 50 (such as Figure 5 ). The PWM1 terminal of the first chip U1 is used to output a pulse signal, such as a PWM (Pulse-Width Modulation) signal. The OV1 terminal of the first chip U1 is used to obtain the current value from the heating terminal and send a heating control signal to the heating terminal.
[0064] Please refer to Figure 1 and Figure 3 In some embodiments, if two main control chips are provided and two peripheral units are provided, the two main control chips are respectively defined as the first chip U1 and the fifth chip U5, and the two peripheral units are respectively defined as the first peripheral unit and the second peripheral unit. The capacitive detection module 10 further includes a second microphone MIC2, and the second peripheral unit includes a sixth capacitor C6, a second MOS transistor Q2, an eleventh resistor R11, a twelfth resistor R12, and a thirteenth resistor R13;
[0065] The fifth chip U5 is electrically connected to the second microphone MIC2, the eleventh resistor R11, the sixth capacitor C6, and the gate of the second MOS transistor Q2. The second resistor R2 is electrically connected to the drain and the gate of the first MOS transistor Q1. The thirteenth resistor R13 is electrically connected to the source of the second MOS transistor Q2; the drain of the second MOS transistor Q2 is electrically connected to the regulated power supply module 30, and the source of the second MOS transistor Q2 is electrically connected to the heating module 70;
[0066] The second microphone MIC2 is used to detect the airflow change and output a second detection signal. The fifth chip U5 performs frequency detection according to the second detection signal to obtain a second oscillation frequency, and thus obtains a suction detection result according to the second oscillation frequency.
[0067] It should be noted that in Figure 3 , the LED2 port is electrically connected to the second indicator module 60 (such as Figure 5 ). The PWM1 terminal of the fifth chip U5 is used to output a pulse signal, and the OV1 terminal of the fifth chip U5 is used to obtain a current value from the heating terminal and send a heating control signal to the heating terminal.
[0068] Please refer to Figure 1 and Figure 4 In some embodiments, the detection circuit further includes a regulated power supply module 30 and a charging protection module 40;
[0069] The charging protection module 40 is electrically connected to the regulated power supply module 30 and an external power supply (not shown in the figure), and the regulated power supply module 30 is electrically connected to the main control module 20.
[0070] The charging protection module 40 has a conducting state or a disconnecting state. The charging protection module 40 is used to detect the current of the regulated power supply module 30 to obtain a first current, and when the first current is greater than or equal to a preset battery current threshold, it switches from the conducting state to the disconnecting state.
[0071] The advantage of this embodiment is that a stable voltage is provided by the voltage-stabilizing power supply module 30, and the current of the voltage-stabilizing power supply module 30 is detected by the charging protection module 40, thereby improving the reliability and stability of the circuit and avoiding damage to the electronic cigarette product due to overcurrent.
[0072] See also Figure 5 In some embodiments, the detection circuit further includes a first indicator light module 50 , a second indicator light module 60 and a heating module 70 .
[0073] The first indicator light module 50 is electrically connected to the charging protection module 40, the second indicator light module 60 is electrically connected to the main control module 20, and the heating module 70 is electrically connected to the main control module 20; the first indicator light module 50 is used to indicate the status of the charging protection module 40; the main control module 20 detects the current of the heating module 70, obtains the second current, and sends a light control signal according to the second current; the second indicator light module 60 switches the light-emitting state according to the light control signal.
[0074] The advantage of this embodiment is that the lighting state of the first indicator light module 50 is controlled according to the state of the charging protection module 40, and the lighting state of the second indicator light module 60 is controlled according to the current of the heating module 70, so that the user can obtain timely, simple and obvious feedback information.
[0075] Specifically, when the current of the charging protection module 40 is greater than or equal to the preset current threshold, the first indicator light module 50 switches to a first light-emitting state, for example, flashing once every 1 second; when the current of the charging protection module 40 is less than the preset current threshold, the first indicator light module 50 switches to a second light-emitting state, for example, not emitting light, or flashing once every 5 minutes.
[0076] Specifically, the heating module 70 may be a heating wire or an atomizing device. The heating module 70 is used to heat the e-liquid when the puff detection result indicates that a puff action is generated, so as to atomize substances such as tar in the e-liquid, so that the user can perform a puff action.
[0077] See also Figure 4 and Figure 6 In some embodiments, the charging protection module 40 includes an interface sub-module J1, a second chip U2, a third chip U3, a fourth chip U4, a fuse F1, a second capacitor C2, a third capacitor, a fourth capacitor C4, a fifth capacitor C5, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a tenth resistor R10.
[0078] The interface sub-module J1 is electrically connected to the fuse F1, the fourth resistor R4, and the fifth resistor R5. The second chip U2 is electrically connected to the fuse F1, the third chip U3, the sixth resistor R6, and the third capacitor. The sixth resistor R6 is electrically connected to the second capacitor C2. The third chip U3 is electrically connected to the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10. The fourth chip U4 is electrically connected to the second chip U2, the third chip U3, the fourth capacitor C4, the fifth capacitor C5, the fourth resistor R4, the fifth resistor R5, the seventh resistor R7, the tenth resistor R10, the interface sub-module J1, and the regulated power supply module 30.
[0079] The interface sub-module J1 is used to connect to an external power supply for charging. The third chip U3 is used for voltage conversion. The fourth chip U4 obtains the test voltage of the regulated power supply module 30. If the test voltage is greater than or equal to a preset voltage threshold, the fourth chip U4 switches to an off state.
[0080] The advantage of this embodiment is that the charging protection module 40 detects the current of the regulated power supply module 30, thereby improving the reliability and stability of the circuit and avoiding damage to the e-cigarette product caused by overcurrent.
[0081] It should be noted that CHAT represents the charging terminal. The third chip U3 outputs a light control signal through the charging terminal to control the lighting state of the first indicator module 50. VB1 represents the voltage input terminal, and the voltage at the voltage input terminal can be 12V.
[0082] Please refer to Figure 5 、 Figure 7A and Figure 7B , in some embodiments, the first indicator module 50 includes the first diode D1 and the fourteenth resistor R14, and the second indicator module 60 includes the second diode D2, the third diode D3, and the fifteenth resistor R15.
[0083] The input end of the first diode D1 is electrically connected to the fourteenth resistor R14, and the output end of the first diode D1 is electrically connected to the fourth chip U4. The fifteenth resistor R15 is electrically connected to the output end of the second diode D2 and the input end of the third diode D3, and the output end of the third diode D3 is electrically connected to the first chip U1.
[0084] The advantage of this embodiment is that the lighting state of the first indicator module 50 is controlled according to the state of the charging protection module 40, and the lighting state of the second indicator module 60 is controlled according to the current of the heating module 70, so that users can obtain timely and simple and obvious feedback information.
[0085] It should be noted that in Figure 7A , CHAT represents the charging terminal, and the charging terminal is electrically connected to the third chip U3 in Figure 6 .
[0086] Please refer to Figure 3 、 Figure 7A and Figure 7B In some embodiments, the second indicator light module 60 further includes a fourth diode D4.
[0087] The input end of the fourth diode D4 is electrically connected to the fifteenth resistor R15, and the output end of the fourth diode D4 is electrically connected to the fifth chip U5; the fifth chip U5 controls the fourth diode D4 to switch the light emitting state.
[0088] In some embodiments, the regulated power supply module 30 has multiple reference voltages, and the regulated power supply module 30 includes a battery unit.
[0089] The regulated power supply module 30 is used to provide a reference voltage and perform voltage conversion on the voltage obtained by the charging protection module 40 to charge the battery unit.
[0090] The embodiments of the present application also provide an electronic cigarette. The electronic cigarette includes the above-mentioned detection circuit based on the electronic cigarette.
[0091] The specific implementation manner of this electronic cigarette is basically the same as that of the above-mentioned specific embodiments of the detection circuit based on the electronic cigarette, and will not be elaborated here.
[0092] The embodiments described in the embodiments of the present application are for more clearly explaining the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art know that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.
[0093] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer modules than shown in the figures, or combine some modules, or different modules.
[0094] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0095] Those of ordinary skill in the art can understand that the functional modules / units in the systems and devices disclosed above can be implemented as software, firmware, hardware, and their appropriate combinations.
[0096] In the description of the present application and the above-mentioned drawings, the terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.
[0097] It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the relationship between related objects and indicates that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist simultaneously. Here, A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (one) of the following" or a similar expression means any combination of these items, including any combination of single items (ones) or plural items (ones). For example, at least one (one) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.
[0098] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the above-mentioned division of units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. The displayed or discussed coupling, direct coupling, or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of devices or units can be in electrical, mechanical, or other forms.
[0099] The units described above as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0100] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of various embodiments of this application. The aforementioned storage medium includes: various media that can store programs, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs.
[0101] The preferred embodiments of the embodiments of this application have been described above with reference to the accompanying drawings. This does not limit the scope of the rights of the embodiments of this application. Any modifications, equivalent replacements, and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of this application shall be within the scope of the rights of the embodiments of this application.
Claims
1. A detection circuit based on an electronic cigarette, characterized in that, The detection circuit includes: a capacitive detection module and a main control module, and the main control module includes an oscillation unit, a counting unit, and a control unit; The oscillation unit is electrically connected to the capacitive detection module, and the counting unit is electrically connected to the oscillation unit and the main control module; When the air flow changes, the capacitance value of the capacitive detection module changes; the oscillation unit is configured to output a corresponding oscillation frequency when the capacitance value of the capacitive detection module changes; the counting unit is configured to detect the oscillation frequency output by the main control module to obtain a target operating frequency; the control unit is configured to determine a suction detection result according to the target operating frequency and a preset oscillation frequency.
2. The detection circuit based on an electronic cigarette according to claim 1, wherein The control unit is further configured to collect a plurality of target operating frequencies detected by the counting unit, and calculate the number of times that the plurality of target operating frequencies are greater than the preset oscillation frequency. If the number of times is greater than or equal to a preset threshold, it is determined that the suction detection result is that a suction action is generated; if the number of times is less than the preset threshold, it is determined that the suction detection result is that there is no suction action.
3. The detection circuit based on an electronic cigarette according to claim 2, wherein The main control module includes at least one main control chip and at least one peripheral unit, and the oscillation unit, the counting unit, and the control unit are integrated in one of the main control chips; The capacitive detection module includes a first microphone. If there is one main control chip and one peripheral unit, the main control chip is a first chip, and the peripheral unit is a first peripheral unit. The first peripheral unit includes a first capacitor, a first MOS transistor, a first resistor, a second resistor, and a third resistor; The first chip is electrically connected to the first microphone, the first resistor, the first capacitor, and the gate of the first MOS transistor. The second resistor is electrically connected to the drain of the first MOS transistor and the gate of the first MOS transistor. The third resistor is electrically connected to the first MOS transistor; The first microphone is configured to detect an air flow change and output a first detection signal. The first chip outputs a corresponding oscillation frequency based on the first detection signal to obtain a first oscillation frequency, and determines the suction detection result according to the first oscillation frequency.
4. The detection circuit based on an electronic cigarette according to claim 3, wherein The detection circuit further includes a charging protection module and a regulated power supply module; The charging protection module is electrically connected to the regulated power supply module and an external power supply, and the regulated power supply module is electrically connected to the main control module; The charging protection module has a conducting state or a disconnecting state. The charging protection module is configured to detect the current of the regulated power supply module to obtain a first current, and when the first current is greater than or equal to a preset battery current threshold, switch from the conducting state to the disconnecting state.
5. The detection circuit based on an electronic cigarette according to claim 4, wherein The detection circuit further includes a first indicator module, a second indicator module, and a heating module; The first indicator module is electrically connected to the charging protection module, the second indicator module is electrically connected to the main control module, and the heating module is electrically connected to the main control module; The first indicator module is used to indicate the status of the charging protection module; the main control module detects the current of the heating module, obtains a second current, and sends a lighting control signal according to the second current; the second indicator module switches the lighting state according to the lighting control signal.
6. The detection circuit based on an electronic cigarette according to claim 5, wherein, The charging protection module includes an interface sub-module, a second chip, a third chip, a fourth chip, a fuse, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, and a tenth resistor; The interface sub-module is electrically connected to the fuse, the fourth resistor, and the fifth resistor, the second chip is electrically connected to the fuse, the third chip, the sixth resistor, and the third capacitor, the sixth resistor is electrically connected to the second capacitor, and the third chip is electrically connected to the eighth resistor, the ninth resistor, and the tenth resistor; The fourth chip is electrically connected to the second chip, the third chip, the fourth capacitor, the fifth capacitor, the fourth resistor, the fifth resistor, the seventh resistor, the tenth resistor, the interface sub-module, and the regulated power supply module; The interface sub-module is used to connect to the external power supply for charging, the third chip is used for voltage conversion, the fourth chip obtains the test voltage of the regulated power supply module, and if the test voltage is greater than or equal to a preset voltage threshold, the fourth chip switches to an off state.
7. The detection circuit based on an electronic cigarette according to claim 6, wherein The first indicator module includes a first diode and a fourteenth resistor, and the second indicator module includes a second diode, a third diode, and a fifteenth resistor; The input end of the first diode is electrically connected to the fourteenth resistor, and the output end of the first diode is electrically connected to the fourth chip; The fifteenth resistor is electrically connected to the output end of the second diode and the input end of the third diode, and the output end of the third diode is electrically connected to the first chip.
8. The detection circuit based on an electronic cigarette according to claim 7, wherein The second indicator module further includes a fourth diode; if there are two main control chips, the two main control chips are the first chip and the fifth chip respectively; The input end of the fourth diode is electrically connected to the fifteenth resistor, and the output end of the fourth diode is electrically connected to the fifth chip; The fifth chip controls the fourth diode to switch to a lighting state.
9. The detection circuit based on an electronic cigarette according to claim 4, wherein The regulated power supply module has multiple reference voltages, and the regulated power supply module includes a battery unit; The regulated power supply module is used to provide the reference voltage and perform voltage conversion on the voltage obtained by the charging protection module to charge the battery unit.
10. An electronic cigarette, characterized in that, The electronic cigarette includes the detection circuit based on the electronic cigarette according to any one of claims 1 to 9.
Citation Information
Cited By
Electronic cigarette automatic charging and discharging test equipment and method
CN121385505A