Electronic cigarette microphone circuit and electronic cigarette
By setting the anti-interference capacitor and the microphone side by side in the electronic cigarette microphone and using the control chip to detect the capacitance change, the problem of weak anti-interference ability of the electronic cigarette microphone is solved, the accuracy and reliability of the signal input are achieved, and the production cost and process complexity are reduced.
Patent Information
- Application Number
- CN202422495564.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-15
AI Technical Summary
Existing electronic cigarette microphones have weak anti-interference capabilities and are easily affected by interference signals, leading to erroneous control operations.
The anti-interference capacitor is set side by side with the microphone. The control chip simultaneously detects the capacitance changes of the microphone and the anti-interference capacitor to determine whether there is an interference signal. When interference is detected, the circuit state is kept unchanged or anti-interference measures are taken.
The anti-interference ability of the electronic cigarette microphone is improved, the accuracy of the signal input is ensured, miscontrol is avoided, the reliability and stability of the electronic cigarette are enhanced, and the production cost and process complexity are reduced.
Smart Images
Figure CN223380039U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic cigarettes, and in particular to an electronic cigarette microphone circuit and an electronic cigarette. Background Art
[0002] Microphones are the mainstream sensor in e-cigarette applications. When a user inhales, air enters the microphone through the e-cigarette's inhalation channel, exerting a certain amount of pressure on the microphone's diaphragm. This pressure causes the diaphragm to vibrate, changing the distance between the diaphragm and the back plate, which in turn causes a change in capacitance. In this way, the e-cigarette microphone connects to components such as the heating coil and battery through wiring, enabling functions such as intelligent startup, charge and discharge management, status indication, and output power management.
[0003] The capacitance of an e-cigarette microphone to ground can change significantly due to changes in user usage (such as body temperature or touching the microphone), ambient temperature, and voltage. Furthermore, existing e-cigarette microphones have a high sensitivity for capacitance detection, which makes them more susceptible to interference signals. Consequently, upon receiving interference signals, the microphone can cause erroneous capacitance changes, leading to incorrect control operations. For example, if the microphone receives interference signals caused by a sudden increase in voltage or a change in ambient temperature, this can cause erroneous capacitance changes and trigger the e-cigarette to activate. Consequently, existing e-cigarette microphones suffer from weak anti-interference capabilities. Utility Model Content
[0004] The embodiments of the present application solve the technical problem of weak anti-interference performance of electronic cigarette microphones in the prior art by providing an electronic cigarette microphone circuit and an electronic cigarette, thereby improving the anti-interference performance of the electronic cigarette microphone, enabling the electronic cigarette microphone to accurately obtain signal input, avoiding the occurrence of erroneous control of the electronic cigarette, and enhancing the reliability and stability of the electronic cigarette microphone and the electronic cigarette. In the process of the electronic cigarette microphone having high anti-interference performance, the production cost and production process are reduced, and other technical effects are achieved.
[0005] In a first aspect, an embodiment of the present invention provides an electronic cigarette microphone circuit, comprising: a control chip, a microphone, and an anti-interference capacitor;
[0006] One end of the microphone is connected to the control chip via the first IO interface pin of the control chip, and the other end is grounded;
[0007] One end of the anti-interference capacitor is connected to the control chip through the second IO interface pin of the control chip, and the other end is grounded;
[0008] The anti-interference capacitor has the same capacitance value as the microphone, and the microphone is positioned close to the anti-interference capacitor.
[0009] Preferably, the wiring of the microphone and the wiring of the anti-interference capacitor are parallel, and the length of the wiring of the microphone is consistent with the length of the wiring of the anti-interference capacitor.
[0010] Preferably, the line width of the microphone is consistent with the line width of the anti-interference capacitor.
[0011] Preferably, it further includes: a first filter capacitor;
[0012] One end of the first filter capacitor is connected to the control chip via an analog voltage interface pin of the control chip, and the other end is grounded.
[0013] Preferably, it further includes: a second filter capacitor;
[0014] One end of the second filter capacitor is connected to the control chip via the working voltage interface pin of the control chip, and the other end is grounded.
[0015] Preferably, the ground terminal of the microphone, the ground terminal of the anti-interference capacitor, the ground terminal of the first filter capacitor and the ground terminal of the second filter capacitor are grounded through the same wiring.
[0016] Preferably, the microphone includes: a capacitive electret microphone and a silicon microphone.
[0017] Preferably, the control chip further includes: a clock line pin, a data line pin and a plurality of function pins.
[0018] Based on the same utility model concept, in a second aspect, the utility model further provides an electronic cigarette, comprising: the electronic cigarette microphone circuit described in the first aspect.
[0019] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
[0020] In the electronic cigarette microphone circuit of an embodiment of the present invention, one end of the microphone is connected to the control chip via a first IO interface pin of the control chip, and the other end is grounded. The microphone obtains user usage information, triggering a change in the microphone's capacitance to ground, and obtaining a value of the change in the microphone's capacitance to ground. The control chip implements a corresponding function based on the change in the microphone's capacitance to ground. For example, the electronic cigarette microphone circuit is used in an electronic cigarette. When only the value of the change in the microphone's capacitance to ground is obtained, the control chip activates the electronic cigarette based on the change in the microphone's capacitance to ground. One end of the anti-interference capacitor is connected to the control chip via a second IO interface pin of the control chip, and the other end is grounded.
[0021] The anti-interference capacitor captures interference signals caused by user usage (such as body temperature, someone touching the microphone), manufacturing, ambient temperature, voltage, and other factors, triggering a capacitance change in the anti-interference capacitor, generating an interference capacitance value. When the control chip simultaneously obtains the microphone's capacitance change to ground and the interference capacitance value, that is, when the control chip determines that both the microphone and the anti-interference capacitor have capacitance changes, it determines that interference exists in the microphone, the circuit, or an electronic cigarette using the circuit. This indicates that the microphone, the circuit, or an electronic cigarette using the circuit has experienced interference introduced by user usage (such as body temperature, someone touching the microphone), manufacturing, ambient temperature, voltage, and other factors. The control chip controls the entire circuit to maintain its state at the previous moment or triggers some anti-interference measures. For example, if an electronic cigarette microphone circuit is used in an electronic cigarette, and the control chip simultaneously obtains the microphone's capacitance change to ground and the interference capacitance value, and determines that interference exists in the electronic cigarette, the control chip controls the electronic cigarette to be in an inactive state.
[0022] Moreover, the anti-interference capacitor is consistent with the capacitance value of the microphone, so that the capacitance of the microphone is consistent with that of the anti-interference capacitor, and then the anti-interference capacitor accurately changes in capacitance, generating an accurate interference capacitance value. The position of the microphone is close to the position of the anti-interference capacitor, indicating that the microphone and the anti-interference capacitor are arranged side by side, and the positions of the microphone and the anti-interference capacitor are close. In the case of interference introduced by factors such as user use (such as human body temperature, people touching the microphone), production and manufacturing, ambient temperature, and voltage in the microphone, the anti-interference capacitor can more accurately change in capacitance, generating an accurate interference capacitance value, thereby assisting the control chip to accurately determine that there is interference in the microphone. In this way, through the electronic cigarette microphone circuit of the embodiment of the present invention, the anti-interference property of the electronic cigarette microphone is improved, the electronic cigarette microphone has the ability to accurately obtain signal input, avoids the occurrence of erroneous control of the electronic cigarette, enhances the reliability and stability of the electronic cigarette microphone and the electronic cigarette, and reduces production costs and production processes in the process of the electronic cigarette microphone having high anti-interference performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference figures denote the same components. In the accompanying drawings:
[0024] Figure 1 The circuit principle diagram of the electronic cigarette microphone circuit in the embodiment of the present utility model is shown;
[0025] Figure 2 A schematic diagram of the wiring of the electronic cigarette microphone circuit in an embodiment of the present utility model is shown. DETAILED DESCRIPTION
[0026] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0027] Example 1
[0028] The first embodiment of the present invention provides an electronic cigarette microphone circuit, such as Figure 1 As shown, the device includes: a control chip, a microphone, and an anti-interference capacitor. One end of the microphone is connected to the control chip via the first IO interface pin of the control chip, and the other end is grounded. One end of the anti-interference capacitor is connected to the control chip via the second IO interface pin of the control chip, and the other end is grounded. The anti-interference capacitor has the same capacitance value as the microphone, and the microphone is positioned close to the anti-interference capacitor.
[0029] exist Figure 1 In the figure, U1 is the control chip, C3 is the anti-interference capacitor, and MIC1 is the microphone. One end of the microphone MIC1 is connected to the control chip through the first IO interface pin PB1 of the control chip, and the other end is grounded GND. One end of the anti-interference capacitor C3 is connected to the control chip through the second IO interface pin PB2 of the control chip, and the other end is grounded GND. The control chip U1 can be an MCU (MIC1rocontroller Unit) chip or a touch chip or other chip. The anti-interference capacitor C3 is used to obtain the interference signal. After obtaining the interference signal, it will generate an interference capacitance value so that the control chip U1 can obtain relevant information about the interference when the capacitance value of the microphone MIC1 to the ground changes, thereby avoiding the situation where the control chip U1 is miscontrolled according to the capacitance value of the microphone MIC1 to the ground. In addition, according to the model of the microphone, the capacitance value of the microphone is determined from the specification sheet of the microphone, and the capacitance value of the anti-interference capacitor is selected according to the capacitance value of the microphone.
[0030] In the electronic cigarette microphone circuit of this embodiment, one end of the microphone is connected to the control chip via a first IO interface pin of the control chip, and the other end is grounded. The microphone obtains user usage information, triggering a change in the microphone's capacitance to ground, and obtaining a value of the change in the microphone's capacitance to ground. The control chip implements a corresponding function based on this value. For example, the electronic cigarette microphone circuit is used in an electronic cigarette. When only the value of the change in the microphone's capacitance to ground is obtained, the control chip activates the electronic cigarette based on this value. One end of an anti-interference capacitor is connected to the control chip via a second IO interface pin of the control chip, and the other end is grounded.
[0031] The anti-interference capacitor captures interference signals caused by user usage (such as body temperature, someone touching the microphone), manufacturing, ambient temperature, voltage, and other factors, triggering a capacitance change in the anti-interference capacitor, generating an interference capacitance value. When the control chip simultaneously obtains the microphone's capacitance change to ground and the interference capacitance value, that is, when the control chip determines that both the microphone and the anti-interference capacitor have capacitance changes, it determines that interference exists in the microphone, the circuit, or an electronic cigarette using the circuit. This indicates that the microphone, the circuit, or an electronic cigarette using the circuit has experienced interference introduced by user usage (such as body temperature, someone touching the microphone), manufacturing, ambient temperature, voltage, and other factors. The control chip controls the entire circuit to maintain its state at the previous moment or triggers some anti-interference measures. For example, if an electronic cigarette microphone circuit is used in an electronic cigarette, and the control chip simultaneously obtains the microphone's capacitance change to ground and the interference capacitance value, and determines that interference exists in the electronic cigarette, the control chip controls the electronic cigarette to be in an inactive state.
[0032] Moreover, the capacitance value of the anti-interference capacitor is consistent with the capacitance value of the microphone, so that the capacitance of the microphone is consistent with the capacitance of the anti-interference capacitor, and then the anti-interference capacitor accurately changes in capacitance, producing an accurate interference capacitance value. The position of the microphone is close to the position of the anti-interference capacitor, indicating that the microphone and the anti-interference capacitor are arranged side by side, and the position of the microphone and the anti-interference capacitor is close. In the case of interference introduced by factors such as user use (such as human body temperature, people touching the microphone), production and manufacturing, ambient temperature, and voltage in the microphone, the anti-interference capacitor can more accurately change in capacitance, producing an accurate interference capacitance value, thereby assisting the control chip to accurately determine that the microphone has interference. In this way, through the electronic cigarette microphone circuit of the present embodiment, the anti-interference property of the electronic cigarette microphone is improved, the electronic cigarette microphone has the ability to accurately obtain signal input, avoids the occurrence of the situation of miscontrolling the electronic cigarette, enhances the reliability and stability of the electronic cigarette microphone and the electronic cigarette, and reduces production costs and production processes in the process of the electronic cigarette microphone having high anti-interference performance.
[0033] Next, combine Figure 1 The structure of the electronic cigarette microphone circuit of this embodiment is described in detail:
[0034] The position of the microphone MIC1 and the anti-interference capacitor C3 are set close to each other as follows: Figure 2As shown, the routing of the microphone MIC1 is parallel to the routing of the anti-interference capacitor C3, and the length of the routing of the microphone MIC1 is consistent with the length of the routing of the anti-interference capacitor C3. The routing of the microphone MIC1 and the anti-interference capacitor C3 are parallel, and the routing lengths of the two are consistent. This makes the position of the microphone MIC1 and the anti-interference capacitor C3 close to each other, and then when the microphone MIC1 is interfered by factors such as user use (such as human body temperature, people touching the microphone), production and manufacturing, ambient temperature, voltage, etc., the anti-interference capacitor C3 can detect the signals caused by these interferences in real time. In addition, the line width of the routing of the microphone MIC1 is consistent with the line width of the routing of the anti-interference capacitor C3. This further makes the position of the microphone MIC1 and the anti-interference capacitor C3 reasonable and close to each other, and the anti-interference capacitor C3 can accurately and in real time detect the interference received by the microphone MIC1, and can also reasonably simplify the circuit routing of the electronic cigarette microphone MIC1 of this embodiment, reduce complexity, reduce size, and improve space utilization and integration.
[0035] In this embodiment, an anti-interference capacitor C3 is positioned adjacent to the branch connecting the microphone MIC1 to the control chip U1, with the branch connecting the microphone MIC1 to the control chip U1 being adjacent to the anti-interference capacitor C3. This allows the microphone MIC1 and the anti-interference capacitor C3 to be positioned close to each other, with their wiring running parallel to each other. This allows the anti-interference capacitor C3 to accurately detect interference when the microphone MIC1 is collecting user usage data, preventing the circuit of this embodiment and the electronic cigarette using this circuit from erroneous operation. Furthermore, the circuit of this embodiment offers advantages such as rational positioning, simplified wiring, reduced complexity, reduced size, improved space utilization, and increased integration. Thus, by positioning the microphone MIC1 and the anti-interference capacitor C3, the anti-interference performance of the microphone MIC1 is enhanced, enabling the microphone MIC1 to accurately acquire signal inputs, preventing the possibility of erroneous control of the electronic cigarette. This enhances the reliability and stability of the microphone, the entire circuit, and the electronic cigarette using the circuit of this embodiment. Furthermore, while the electronic cigarette microphone MIC1 has high anti-interference performance, production costs and production processes are reduced.
[0036] like Figure 1 As shown, the electronic cigarette microphone circuit of this embodiment also includes: a first filter capacitor C1. One end of the first filter capacitor C1 is connected to the control chip U1 through the analog voltage interface pin VDDA of the control chip U1, and the other end is grounded GND. The first filter capacitor C1 is used to filter out the noise of the analog voltage interface pin VDDA. The analog voltage interface pin VDDA is used to provide the operating voltage of the analog circuit inside the control chip U1. For example, an analog-to-digital converter (ADC) or an analog comparator. VDDA usually requires a cleaner power supply to reduce noise and interference, ensure the accuracy and stability of the analog signal of the control chip U1, and thereby enhance the reliability and stability of the control chip U1 and the entire circuit. This can also improve the anti-interference performance of the entire circuit.
[0037] like Figure 1 As shown, the electronic cigarette microphone circuit of this embodiment further includes a second filter capacitor C2. One end of the second filter capacitor C2 is connected to the control chip U1 via the operating voltage interface pin VDD of the control chip U1, and the other end is grounded GND. The second filter capacitor C2 is used to filter noise from the operating voltage interface pin VDD. The operating voltage interface pin VDD is used to provide the operating voltage of the control chip U1. The provision of the second filter capacitor C2 reduces noise and interference, enhances the reliability and stability of the control chip U1 and the entire circuit, and improves the anti-interference performance of the entire circuit.
[0038] like Figure 2 As shown, the grounding terminal of the microphone MIC1, the grounding terminal of the anti-interference capacitor C3, the grounding terminal of the first filter capacitor C1 and the grounding terminal of the second filter capacitor C2 are grounded through the same trace. It should be noted that the grounding terminal of these components is one end that is grounded, such as the grounding terminal of the microphone MIC1 is the end that is grounded, and the other end of the microphone MIC1 is connected to the first IO interface pin PB1 of the control chip U1. Figure 2 In the circuit, a looped trace connects the ground terminals of microphone MIC1, anti-interference capacitor C3, first filter capacitor C1, and second filter capacitor C2, connecting all of these components to ground through a single trace. This means that all components share the same ground network. This rationalizes the routing of each component in the circuit, simplifies routing, reduces complexity, minimizes size, and improves space utilization and integration. It also avoids the need for multiple separate ground wires, thereby reducing production costs and process steps.
[0039] Microphone MIC1 includes: condenser electret microphone and silicon microphone. Figure 1 As shown, the control chip U1 also includes a clock line pin (SCL), a data line pin (SDA), and multiple function pins. The clock line pin SCL and the data line pin SDA enable the control chip U1 to perform I2C communication. Multiple function pins, such as pins PA1-PA6, are used to connect to different devices and implement different functions. Multiple function pins can be set according to actual needs.
[0040] The working principle of the electronic cigarette head circuit of this embodiment is as follows: When interference is caused by factors such as human touch, human body temperature, manufacturing, ambient temperature, and voltage, the microphone MIC1 and the anti-interference capacitor C3 can simultaneously detect this interference, and then the microphone MIC1 and the anti-interference capacitor C3 will simultaneously undergo capacitance changes, that is, the change value of the microphone MIC1's capacitance to ground and the interference capacitance value of the anti-interference capacitor C3 are obtained. The control chip U1 detects the simultaneous presence of the capacitance change value to ground and the interference capacitance value, determines that there is interference between the microphone MIC1 and the entire circuit, and avoids the control chip U1 from miscontrolling based on the capacitance change value to ground of the microphone MIC1. Therefore, the circuit of this embodiment improves the anti-interference performance of the electronic cigarette microphone MIC1, enables the electronic cigarette microphone MIC1 to accurately obtain signal input, avoids the occurrence of miscontrol of the electronic cigarette, enhances the reliability and stability of the electronic cigarette microphone MIC1 and the electronic cigarette, and reduces production costs and production processes while the electronic cigarette microphone MIC1 has high anti-interference performance.
[0041] Example 2
[0042] Based on the same utility model concept, the second embodiment of the present utility model further provides an electronic cigarette, including: the electronic cigarette microphone circuit described in the first embodiment.
[0043] It should be understood by those skilled in the art that although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.
[0044] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims
1. An electronic cigarette microphone circuit, characterized in that: include: Control chip, microphone and anti-interference capacitor; One end of the microphone is connected to the control chip via the first IO interface pin of the control chip, and the other end is grounded; One end of the anti-interference capacitor is connected to the control chip through the second IO interface pin of the control chip, and the other end is grounded; The anti-interference capacitor has the same capacitance value as the microphone, and the microphone is positioned close to the anti-interference capacitor.
2. The electronic cigarette microphone circuit according to claim 1, characterized in that: The wiring of the microphone and the wiring of the anti-interference capacitor are parallel to each other, and the length of the wiring of the microphone is consistent with the length of the wiring of the anti-interference capacitor.
3. The electronic cigarette microphone circuit according to claim 2, wherein: The line width of the microphone is consistent with the line width of the anti-interference capacitor.
4. The electronic cigarette microphone circuit according to claim 1, wherein: Also includes: a first filter capacitor; One end of the first filter capacitor is connected to the control chip via an analog voltage interface pin of the control chip, and the other end is grounded.
5. The electronic cigarette microphone circuit according to claim 4, characterized in that: Also includes: A second filter capacitor; One end of the second filter capacitor is connected to the control chip via the working voltage interface pin of the control chip, and the other end is grounded.
6. The electronic cigarette microphone circuit according to claim 5, characterized in that: The ground terminal of the microphone, the ground terminal of the anti-interference capacitor, the ground terminal of the first filter capacitor, and the ground terminal of the second filter capacitor are grounded through the same wiring.
7. The electronic cigarette microphone circuit according to claim 1, wherein: The microphone includes: a capacitive electret microphone and a silicon microphone.
8. The electronic cigarette microphone circuit according to claim 1, wherein: The control chip further includes: a clock line pin, a data line pin and a plurality of function pins.
9. An electronic cigarette, characterized in that: include: The electronic cigarette microphone circuit according to any one of claims 1 to 8.