WO2023040950A1

WO2023040950A1 - Electronic cigarette control method, electronic cigarette sensing chip and electronic cigarette

Info

Publication number: WO2023040950A1
Application number: PCT/CN2022/118999
Authority: WO
Inventors: 程腾艳; 梅嘉欣; 唐益谦
Original assignee: 苏州敏芯微电子技术股份有限公司
Priority date: 2021-09-15
Filing date: 2022-09-15
Publication date: 2023-03-23
Also published as: CN113729310A

Abstract

Disclosed in the embodiments of the present application are an electronic cigarette control method, an electronic cigarette sensing chip and an electronic cigarette. The electronic cigarette control method comprises: acquiring a measurement pressure of an electronic cigarette, wherein the measurement pressure is determined by both the pressure of a gas flow channel and the pressure of an external environment; according to a change rule of the measurement pressure, determining whether the electronic cigarette is in a smoking state or a non-smoking state; in response to the electronic cigarette being in the non-smoking state and the measurement pressure changing, updating a baseline according to the change in the measurement pressure, such that the baseline matches an initial value of the measurement pressure; and in response to the electronic cigarette being in the smoking state, not updating the baseline.

Description

Electronic cigarette control method, electronic cigarette sensor chip and electronic cigarette

This application claims priority to a Chinese patent application with application number 202111079401.7 filed with the China Patent Office on September 15, 2021, the entire contents of which are incorporated herein by reference.

technical field

The embodiments of the present application relate to the technical field of electronic cigarettes, for example, to a control method of electronic cigarettes, electronic cigarette sensor chips and electronic cigarettes.

Background technique

Electronic cigarettes do not contain harmful ingredients such as tar and suspended particles. With the improvement of people's health awareness, smoking electronic cigarettes is becoming a trend. Moreover, the e-liquid of the electronic cigarette can be seasoned by adding flavoring agents of different components, and users can choose the taste of the e-liquid according to their own preferences.

During the use of electronic cigarettes, if the external environment changes rapidly, such as aircraft lifts, high-speed elevators, etc., the pressure difference on both sides of the pressure sensing element inside the electronic cigarette will reach the set trigger threshold, which will cause the electronic cigarette to appear. Misstarting the cigarette lighter. Therefore, it is necessary to update the baseline when the external environment changes, so as to avoid false activation of the electronic cigarette. However, the electronic cigarette control method in the related art will not only update the baseline when the external environment changes, but will also update the baseline during the smoking process, and the problem of wrong update will occur, resulting in the continuous decrease of the sensitivity of the sensor, and even the great pressure of smoking. The phenomenon that the electronic cigarette cannot be activated.

Contents of the invention

The embodiment of the present application provides a control method of an electronic cigarette, an electronic cigarette sensor chip and an electronic cigarette, so as to optimize the timing of sensor baseline update, improve the problem of false baseline update, and improve the sensitivity of the electronic cigarette sensor chip.

In the first aspect, the embodiment of the present application provides a method for controlling an electronic cigarette, the method comprising:

Obtain the detection pressure of the electronic cigarette; wherein, the detection pressure is jointly determined by the pressure of the airflow channel and the external environment pressure;

According to the change law of the detected pressure, it is judged that the electronic cigarette is in a smoking state or a non-smoking state;

In response to the electronic cigarette being in a non-smoking state and the detected pressure changes, updating the baseline according to the change of the detected pressure, so that the baseline matches the initial value of the detected pressure;

In response to the e-cigarette being in a smoking state, the baseline is not updated.

In the second aspect, the embodiment of the present application also provides an electronic cigarette sensing chip, including: a pressure sensing element and a processing module;

The pressure sensing element is configured to detect the pressure difference between the airflow channel and the external environment; the processing module is configured to implement the electronic cigarette control method provided in the first aspect of the present application.

In the third aspect, the embodiment of the present application also provides an electronic cigarette, which includes: a cigarette rod and a microphone, and the atomizer and the electronic cigarette sensor chip provided in the second aspect of the application are arranged in the microphone .

Description of drawings

Fig. 1 is a flow chart of an electronic cigarette control method provided by the embodiment of the present application;

Fig. 2 is a schematic structural diagram of an electronic cigarette sensor chip provided by an embodiment of the present application;

Fig. 3 is a schematic diagram of updating the baseline when smoking provided by the embodiment of the present application;

FIG. 4 is a schematic diagram of updating a baseline when the external environment changes according to an embodiment of the present application;

Fig. 5 is a schematic structural diagram of an electronic cigarette sensor chip provided by an embodiment of the present application;

Fig. 6 is a schematic structural diagram of an electronic cigarette provided in an embodiment of the present application.

Detailed ways

The application will be described in detail below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a flow chart of a method for controlling an electronic cigarette provided by an embodiment of the present application. The method can be executed by a processing module in the electronic cigarette sensor chip, and the processing module can be realized by software and/or hardware. Referring to Figure 1, the control methods of electronic cigarettes include:

S110. Obtain the detection pressure of the electronic cigarette; wherein, the detection pressure is jointly determined by the pressure of the airflow channel and the pressure of the external environment.

Wherein, the detection pressure of the electronic cigarette is measured by the pressure sensing element. Optionally, the detected pressure is the difference between the pressure of the airflow channel and the pressure of the external environment. When the baseline is 0, when the pressure of the airflow channel is equal to the pressure of the external environment, the detection pressure is zero, indicating that the user is not smoking; when the pressure of the airflow channel is lower than the pressure of the external environment, the detection pressure decreases to a negative number, indicating that the user smoking. It should be noted that the airflow channel is the airflow channel inside the electronic cigarette.

The principle of obtaining the detected pressure of the electronic cigarette will be described below. FIG. 2 is a schematic structural diagram of an electronic cigarette sensor chip provided by an embodiment of the present application. Referring to FIG. 2 , optionally, the electronic cigarette sensing chip 200 includes: a pressure sensing element 206 and a processing module 205 . The pressure sensing element 206 is located between the first pressure environment and the second pressure environment. For example, above the pressure sensing element 206 is the first pressure environment, such as the environment of the airflow channel of the electronic cigarette; below the pressure sensing element 206 is the second pressure environment, such as the external environment. The pressure sensing element 206 converts the pressure difference between the first pressure environment and the second pressure environment into an electrical signal output, and the electrical signal is the detected pressure obtained by the processing module 205 from the pressure sensing element 206 . Exemplarily, the detection pressure is positively correlated with the pressure difference, that is, the greater the pressure difference, the greater the detection pressure; the smaller the pressure difference, the lower the detection pressure. For electronic products with airflow channels such as electronic cigarettes, the smoking action causes changes in the gas flow rate in the airflow channel, and the gas flow rate in the airflow channel will affect the pressure of the airflow channel, resulting in negative pressure, thereby causing a drop in detection pressure. Similarly, when the atmospheric pressure of the external environment changes, the detection pressure will also change.

Wherein, the detected pressure generated by the pressure sensing element 206 cannot be directly used for pressure calculation, but needs to be calculated and processed by the processing module 205 . Define processed detection pressure as detection pressure. Exemplarily, the processing module 205 provides a baseline, and after the detected pressure is different from the baseline, the final value of the detected pressure obtained is more accurate. In general, the value of the baseline is constant.

Optionally, the pressure sensing element 206 is electrically connected to the processing module 205 through the connection line 209 , and the processing module 205 is electrically connected to the external drive control circuit through the connection line 210 . Wherein, the connecting wire 209 and the connecting wire 210 are made of the same material, for example, gold wire and other materials with better electrical conductivity. The electronic cigarette sensor chip 200 also includes a substrate 201 and a housing 208 fixedly connected to the substrate 201, and the processing module 205 is arranged on the substrate 201. Wherein, the substrate 201 is configured to support the housing 208, and is configured to lead the voltage output by the processing module 205 to the main board of the electronic device, and the main board is provided with circuit structures such as a drive control circuit. The housing 208 is configured to package the electronic cigarette sensor chip 200, and the material of the housing 208 may be metal or plastic, for example. Exemplarily, the pressure sensing element 206 is fixed on the substrate 201 by bonding glue 203 , and the processing module 205 is fixed on the substrate 201 by bonding glue 204 . The substrate 201 includes a first air hole 202 connected to the first pressure environment; the housing 208 includes a second air hole 207 connected to the second pressure environment; the pressure sensing element 206 covers the first air hole 202 .

S120. Determine whether the electronic cigarette is in a smoking state or in a non-smoking state.

Among them, in the non-smoking state, the change of the detection pressure is mainly caused by the change of the external environment. The change of the external environment can be an airplane lift, a high-speed elevator, riding a Ferris wheel, experiencing bungee jumping, etc. Therefore, both the smoking state and the non-smoking state of the electronic cigarette will cause changes in the detection pressure. The inventors have found through research that the change rules of the detection pressure are different in these two situations. The embodiments of the present application can determine whether the electronic cigarette is in a smoking state or a non-smoking state according to different changing rules.

S130. If the electronic cigarette is in a non-smoking state and the detection pressure changes, update the baseline according to the change of the detection pressure; so that the baseline matches the initial value of the detection pressure.

Among them, the baseline refers to the reference line of the detection pressure, that is, the baseline is a reference point for comparison with the detection pressure. Since the detection pressure will change before and after smoking, the initial value of the detection pressure is the detection pressure when not smoking. Exemplarily, the baseline matches the initial value of the detected pressure, that is, the baseline is equal to the initial value of the detected pressure. That is to say, in practical applications, it is necessary to make a difference between the detected pressure and the baseline to determine an accurate pressure value. Exemplarily, the original baseline is 0. When the atmospheric pressure increases due to changes in the external environment, the pressure in the flue becomes smaller relative to the external environment in a non-smoking state, that is, the detected pressure output by the pressure sensing element decreases. Based on the original baseline, the detection pressure is made to be different from 0, and the obtained detection pressure may be considered as the user is in a smoking state. However, the user is not smoking at this time. At this time, the value represented by the baseline can be reduced by updating the baseline. Smoke misfired.

S140. If the electronic cigarette is in a smoking state, do not update the baseline.

Wherein, not updating the baseline means that the baseline does not change with changes in the detection pressure. Fig. 3 is a schematic diagram of updating a baseline when smoking according to an embodiment of the present application. Referring to FIG. 3 , for example, the curve 301 represents the pressure detected by the pressure sensing element, that is, the detected pressure, the curve 302 represents the first threshold for triggering the opening of the atomizer, and the curve 303 represents the third threshold for triggering the opening of the atomizer, Curve 304 represents the interrupt signal output by the electronic cigarette sensor chip, and curve 305 represents the baseline. Among them, the baseline value is equal to the detection pressure when not smoking. The first threshold is the nebulizer trigger threshold before the baseline update, and the third threshold is the atomizer trigger threshold after the baseline update. When the curve 304 is at a low level, the atomizer is controlled not to be turned on; when the curve 304 is at a high level, the atomizer is controlled to be turned on.

In the time period T0, before the baseline is updated, the first threshold is used as the atomizer trigger threshold. The curve 301 is zero and higher than the first threshold, indicating that the electronic cigarette is in a non-smoking state. Therefore, the curve 304 is at a low level, and the atomizer is controlled not to be turned on. In the time period T1, the smoking action is performed, and the curve 301 changes from zero pressure to negative pressure. When the pressure is lower than the first threshold, the curve 304 changes from low level to high level, and the atomizer is controlled to open until the pressure is detected again. Above the first threshold, the curve 304 changes from a high level to a low level, and the atomizer is controlled to be turned off. In the time period T2, at the end of the smoking action, the detection pressure is still a negative pressure, which causes the baseline to be incorrectly updated and the baseline value to decrease. Correspondingly, the nebulizer trigger threshold becomes a third threshold, and the third threshold is smaller than the first threshold. In the time period T3, the detected pressure represented by the curve 301 is higher than the third threshold, indicating that the electronic cigarette is in a non-smoking state. Therefore, the curve 304 is at a low level, and the atomizer is controlled not to be turned on. In the time period T4, the smoking action is performed again, and the detection pressure represented by the curve 301 decreases. However, when the detected pressure is lower than the first threshold, the curve 304 is still at a low level, failing to trigger the atomizer to open. Only when the suction force of smoking is further increased, so that the detected pressure is further reduced below the third threshold, the curve 304 becomes high level, triggering the atomizer to be turned on. It should be noted that the difference between the first threshold and the baseline is equal to the difference between the third threshold and the baseline, but due to the update of the baseline, the value of the detected pressure increases as a whole, which is equivalent to the decrease of the first threshold and becomes the third threshold. It can be seen that when the baseline is updated during the smoking process, it is easy to cause the baseline to be continuously updated to a lower value, the negative pressure generated by smoking needs to be continuously increased, and the problem of difficulty in triggering the atomizer occurs. Therefore, it is necessary to avoid updating the baseline during the smoking behavior.

In the embodiment of the present application, by obtaining the detection pressure of the electronic cigarette, it is judged that the electronic cigarette is in the smoking state or in the non-smoking state; if the change in the detection pressure is caused by the non-smoking state, the baseline is updated; if the electronic cigarette is in the smoking state, the baseline is not updated , which avoids updating the baseline during smoking. Therefore, the embodiment of the present application solves the problem in the related art that the sensor baseline is incorrectly updated during the smoking process, resulting in a continuous decrease in sensor sensitivity, and the electronic cigarette cannot be started when the smoking pressure is high, thereby realizing accurate update of the baseline , improving the sensitivity of the electronic cigarette sensor chip, which can bring customers a more humanized smoking experience.

There are many ways to judge whether the e-cigarette is in the smoking state. For example, judging according to the change rule of the detection pressure. As a limitation of this application.

Fig. 4 is a schematic diagram of updating a baseline when the external environment changes according to an embodiment of the present application. Referring to FIG. 4 , in one embodiment of the present application, optionally, the change pattern of the detection pressure includes: if the detection pressure lasts for a preset time after a decrease and then rises, the electronic cigarette is in a smoking state; if the detection pressure is at If it does not rise after the preset time, the electronic cigarette is in a non-smoking state. Exemplarily, the detection pressure changes as shown in time period T6 and time period T8, when the user smokes, the pressure of the airflow channel is lower than the external environment pressure, causing the detection pressure to drop. However, the falling time will not last for too long. After a preset time (for example, 2s-5s), the pressure of the airflow channel returns to normal, and the detection pressure returns to zero. On the contrary, the detection pressure drop or rise caused by the change of the external environment of the electronic cigarette lasts for a long time, which is much longer than the smoking time. The change of the detection pressure shown in the time period T10, when the electronic cigarette is in the non-smoking state, causes the detection pressure to drop, and the duration of the drop exceeds a preset time. Wherein, the preset time can be set according to needs, which is not limited in this application.

Continuing to refer to FIG. 4 , in one embodiment of the present application, optionally, the detection pressure change law includes: if the detection pressure decreases, and within the first preset number of sampling times, the detection pressure decreases to less than the first threshold pressure value, the electronic cigarette is in the smoking state; if the detected pressure decreases, and within the first preset sampling times, the detected pressure does not decrease to a value less than the first threshold pressure, the electronic cigarette is in the non-smoking state; and if the detected If the pressure is less than the value of the second threshold pressure and greater than the first threshold pressure within the second consecutive preset sampling times, the baseline is updated; wherein, the second threshold pressure is greater than the first threshold pressure, and the second preset sampling times is greater than the first threshold pressure. Preset number of samples.

Exemplarily, the first preset sampling times may be one, and the second preset sampling times may be 10 times. As shown in the process of reducing the detection pressure at the junction of the time period T5 and the time period T6, and the reduction process of the detection pressure shown at the junction of the time period T7 and the time period T8, if in one sampling, the detection pressure changes from 0 If it falls below the first threshold pressure, it indicates that the electronic cigarette is in a smoking state. For example, in the time period T10, in 10 consecutive samplings, the detected pressure did not drop below the first threshold pressure (that is, the first threshold that triggers the opening of the nebulizer indicated by the curve 302), but was less than the value of the second threshold pressure (that is, Curve 306 in FIG. 4). Wherein, the second threshold pressure is greater than the first threshold pressure. Exemplarily, the second threshold pressure is 20%, 30%, 40% or 50% of the first threshold pressure. That is to say, if the detected pressure drops to be between the second threshold pressure and the first threshold pressure, it is determined that the pressure change is caused by environmental changes, and the baseline is updated at this time. The embodiment of the present application is set in such a way that when the detected pressure changes are small and when the environment changes suddenly, the changes can be ignored, thereby helping to avoid the baseline update triggered by environmental noise.

Continuing to refer to FIG. 4 , optionally, the smoking process includes a process from a non-smoking state to a smoking state (that is, a process of "sucking") and a process of returning from a smoking state to a non-smoking state (that is, a process of "releasing"). It causes a rapid drop in detection pressure when "suction", and a slow increase in pressure when "release". However, the change of the external environment pressure is generally relatively slow, and the rate of decrease of the detection pressure caused by it is relatively low. And, the change of the external environment pressure is generally smaller than the pressure change when smoking. Continuing to refer to FIG. 4 , on the basis of the above embodiments, for example, assuming that the baseline is 0, the detected pressure is equal to the calculated pressure (that is, the final detected pressure), and accordingly, the first threshold pressure is equal to the first threshold, The first threshold is used as the nebulizer trigger threshold, and the second threshold pressure is 50% of the first threshold.

In the time period T5, before the baseline is updated, the detected pressure represented by the curve 301 is zero and higher than the first threshold, indicating that the electronic cigarette is in a non-smoking state. Therefore, the curve 304 is at a low level, and the atomizer is controlled not to be turned on.

In the time period T6, the smoking action is performed, and the curve 301 changes from zero pressure to negative pressure. At the junction of the time period T5 and the time period T6, continuous sampling is performed 10 times, and the detection pressure continues to decrease, and when the pressure is lower than the first threshold , the curve 304 changes from a low level to a high level, and the atomizer is controlled to be turned on until the detected pressure is higher than the first threshold again, and the curve 304 is changed from a high level to a low level, and the atomizer is controlled to be turned off.

In the time period T7, the detection pressure represented by the curve 301 is 0, higher than the first threshold and 50% of the first threshold, the curve 304 is at a low level, and the atomizer is controlled not to be turned on.

In the time period T8, the smoking action is performed, and the curve 301 changes from zero pressure to negative pressure. At the junction of the time period T7 and the time period T8, continuous sampling is performed 10 times, and the detection pressure continues to decrease, and when the pressure is lower than the first threshold , the curve 304 changes from a low level to a high level, and the atomizer is controlled to be turned on until the detected pressure is higher than the first threshold again, and the curve 304 is changed from a high level to a low level, and the atomizer is controlled to be turned off.

In the time period T9, the detection pressure represented by the curve 301 is 0, higher than the first threshold and 50% of the first threshold, the curve 304 is at a low level, and the atomizer is controlled not to be turned on.

In the time period T10, the external environment pressure increases, and the curve 301 decreases, but the value decreased by the curve 301 is small, continuous sampling is 10 times, and the value decreased by the curve 301 is between 50% of the first threshold and the first threshold, indicating that The change of curve 301 is in the non-smoking state.

In the time period T11, the curve 301 remains constant again. At the beginning of the time period T11, the baseline is updated so that the baseline value decreases, and the first threshold is equivalently transformed into the second threshold. 50% for comparison. Since the detected pressure is higher than the second threshold and 50% of the second threshold, the curve 304 is still at a low level, failing to trigger the opening of the atomizer.

It can be seen that the embodiment of the present application only updates the baseline in the non-smoking state, and does not update the baseline in the process of smoking, which is beneficial to avoid the problem of false baseline update, thereby realizing accurate update of the baseline and improving the electronic cigarette sensor. The sensitivity of the chip can bring customers a more humane smoking experience.

It should be noted that, in the foregoing embodiments, the description is made by taking the pressure lower than the atmospheric pressure as an example, therefore, both the first threshold pressure and the second threshold pressure are negative values. For the case of pressure greater than atmospheric pressure, it is symmetrical to the case of pressure less than atmospheric pressure. Exemplarily, if the detected pressure rises, and within the first preset number of sampling times, the detected pressure rises to a value greater than the absolute value of the first threshold pressure, the electronic cigarette is in the blowing state; if the detected pressure rises, And within the first preset number of sampling times, if the detection pressure does not increase to a value greater than the absolute value of the first threshold pressure, the electronic cigarette is in a non-smoking state; and if the detection pressure is less than within the second consecutive preset number of sampling times The second value of the absolute value of the threshold pressure is used to update the baseline.

On the basis of the foregoing embodiments, the embodiment of the present application also limits the updated value of the baseline.

On the basis of the above embodiments, optionally, updating the baseline includes: if the detected pressure increases, the baseline increases; if the detected pressure decreases, the baseline decreases. As shown at the start time of the time period T11 in FIG. 4 , the detected pressure value decreases at this time, and the baseline also begins to decrease. This is because the baseline represents the zero pressure of the airflow channel, and when the pressure of the airflow channel decreases, the baseline is correspondingly lowered so that the airflow channel is still at zero pressure relative to the baseline. Therefore, it is set up so that the baseline update is accurate.

On the basis of the above-mentioned embodiments, optionally, the change amount of the baseline is: the average value of the detected pressure of preset sampling times. Exemplarily, as shown at the beginning of the time period T11 in FIG. 4, when the detected pressure drops below 50% of the first threshold, the detected pressure of 10 consecutive samples is still between 50% of the first threshold and the first threshold. Between a threshold value, the baseline is updated after 10 consecutive samplings, and the average value of the detected pressure of 10 consecutive samplings is taken as the variation of the baseline. This setting is beneficial to avoid the influence of environmental noise and make the value of the baseline update more accurate.

Fig. 5 is a schematic structural diagram of an electronic cigarette sensor chip provided by an embodiment of the present application. Referring to FIG. 5 , the electronic cigarette sensor chip 200 includes: a pressure sensing element 206 and a processing module 205; the pressure sensing element 206 is configured to detect the pressure difference between the airflow channel and the external environment; the processing module 205 is configured to implement any of the above-mentioned embodiments. The technical principle of the electronic cigarette control method described above is similar, and will not be repeated here.

Continue referring to FIG. 5 , on the basis of the foregoing embodiments, optionally, the processing module 205 is implemented by hardware and/or software. The processing module 205 includes: a logic judgment unit 503 and a baseline update unit 504 . The logic judging unit 503 is configured to judge whether the electronic cigarette is in a smoking state or a non-smoking state according to the change rule of the detected pressure. The baseline updating unit 504 is configured to update the baseline according to the change of the detected pressure when the electronic cigarette is in the non-smoking state and the detected pressure changes, so that the baseline matches the initial value of the detected pressure; when the electronic cigarette is in the smoking state, the baseline is not updated.

On the basis of the above embodiments, optionally, the pressure sensing element 206 is a capacitive pressure sensing element or a piezoresistive pressure sensing element. Exemplarily, the pressure sensing element 206 is a capacitive pressure sensing element, and the processing module 205 further includes: a capacitance-frequency conversion unit 505 , a reference frequency unit 506 and a frequency measurement unit 507 . The capacitance-frequency conversion unit 505 is configured to convert the capacitance value detected by the pressure sensing element 206 into a measurement frequency. The reference frequency unit 506 is configured to output a reference frequency. The frequency measurement unit 507 is configured to determine the detection pressure according to the measurement frequency and the reference frequency. Wherein, the magnitude of the measurement frequency represents the magnitude of the detection pressure, for example, the higher the measurement frequency, the greater the detection pressure; the lower the measurement frequency, the smaller the detection pressure.

Wherein, the pressure sensing element is a capacitive pressure sensing element, and the capacitance value of the capacitive pressure sensing element is positively correlated with the pressure difference. For electronic products with airflow channels such as electronic cigarettes, the smoking action causes changes in the gas flow rate in the airflow channel, and the gas flow rate in the airflow channel will affect the pressure of the airflow channel, resulting in negative pressure, which causes the capacitive pressure sensing element change in capacitance value. The capacitance-frequency conversion unit 505 is electrically connected to the pressure sensing element 206 and configured to convert the capacitance value into a measurement frequency. The reference frequency unit 506 is set to output a reference frequency, the reference frequency does not change with the change of the external pressure difference, and can be used as a reference for frequency measurement. Exemplarily, the capacitance-frequency conversion unit 505 includes an RC oscillator, an LC oscillator or a multivibrator. Since the output frequencies of the RC oscillator, LC oscillator, and multivibrator are all related to the capacitance, the embodiment of the present application is set in this way, which is beneficial to change the capacitance-frequency conversion unit 505 by changing the capacitance value of the capacitive pressure sensing unit. At this time, the capacitive pressure sensing unit is equivalent to a part of an RC oscillator, an LC oscillator or a multivibrator.

In the embodiment of the present application, by setting the capacitance-frequency conversion unit 505, the frequency signal representing the pressure difference can be collected and output in real time, so that the real-time collection of the pressure signal does not need to be provided with a main control chip. And compared with the main control chip, the power consumption of the differential pressure sensor (that is, the capacitance-frequency conversion unit 505) is lower (for example, the power consumption of the differential pressure sensor can be one ten thousandth of the power consumption of the main control chip), so , which is beneficial to reduce the overall power consumption of electronic equipment.

Continuing to refer to FIG. 5 , on the basis of the foregoing embodiments, optionally, the processing module 205 further includes: a nonvolatile memory 508 and a port control unit 509 . Non-volatile memory 508 is configured to store threshold setting parameters and sensitivity calibration parameters. The port control unit 509 is configured to output an interruption signal and a pressure signal according to the detected pressure and the judging result that the electronic cigarette is in a smoking state or a non-smoking state.

Wherein, the non-volatile memory 508 is a programmable read-only memory, an electrically rewritable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, or a flash memory. An interrupt signal refers to a signal indicating whether the differential pressure exceeds a threshold. For example, for the port control unit, the interrupt signal refers to the signal indicating whether there is a smoking action.

Since the inherent parameters of different pressure sensing elements are different, sensitivity calibration of the pressure sensing elements is required. Exemplarily, before the pressure sensing element leaves the factory, sensitivity calibration is performed on the pressure sensing element, and the sensitivity calibration parameters are written into the non-volatile memory 508, so as to perform sensitivity calibration in subsequent applications and improve the accuracy of pressure detection.

In the above embodiments, optionally, the frequency measurement unit 507 , the logic judgment unit 503 , the baseline update unit 504 and the nonvolatile memory 508 are integrated in the digital unit 512 .

Continue to refer to Fig. 5, on the basis of above-mentioned each embodiment, optionally, pressure sensing element 206 comprises micro-electro-mechanical system sensor, micro-electro-mechanical system sensor is referred to as micro-electro-mechanical system (Micro-Electro-Mechanical System, MEMS) sensor, MEMS The sensor is a variable capacitor fabricated on a silicon substrate material, and changes in the first pressure environment and/or the second pressure environment cause corresponding changes in capacitance.

The processing module 205 includes an application specific integrated circuit (Application Specific Integrated Circuit, ASIC) chip. Compared with general-purpose integrated circuits, ASIC chips have the advantages of small size, low power consumption, high reliability, enhanced confidentiality and reduced cost when mass-produced. Wherein, the function of the capacitance-frequency conversion unit 505 is to convert the capacitance value of the MEMS capacitor into a corresponding MEMS frequency 513 for output. The circuit form of the reference frequency unit 506 is similar to that of the capacitance-frequency conversion unit 505, and its function is to generate a stable reference frequency 514 output, which does not change with the first pressure environment and the second pressure environment. The digital unit 512 includes a frequency measurement unit 507 , a logic judgment unit 503 , a baseline update unit 504 and a non-volatile memory 508 . The frequency measurement unit 507 measures the MEMS frequency 513 with the reference frequency 514 , or measures the reference frequency 514 with the MEMS frequency 513 to obtain a measurement result 515 , that is, the final detected pressure. The logic judgment unit 503 is configured to obtain a judgment result according to the frequency measurement result and the threshold setting parameter. Such setting makes the logic structure of the digital unit 512 simple and easy to implement.

The logic judging unit 503 adopts the control method provided by the embodiment of the present application to judge whether it is a smoking process or a non-smoking process, and outputs a signal 516 whether to update the baseline, so as to update the baseline when the baseline updating unit 504 receives the update signal. The digital unit 512 outputs a logical judgment result 517, which indicates whether there is smoking behavior. The port control unit 509 outputs corresponding signals at the chip output terminal 510 and the output terminal 511 according to the logic judgment result 517 . The signal output from the output terminal 510 represents the high/low level interrupt signal of smoking behavior, and the signal output from the output terminal 511 is a pressure signal reflecting the pressure/flow in real time. Exemplarily, when the logical judgment result 517 shows that there is a smoking behavior, the output terminal 510 outputs a high level, and the output terminal 511 outputs a pressure signal; when the logical judgment result 517 shows that there is no smoking behavior, the default output is restored, and the output terminal 510 outputs low level, and the output terminal 511 outputs a pressure signal at the same time.

The embodiment of the present application also provides an electronic cigarette. Fig. 6 is a schematic structural diagram of an electronic cigarette provided in an embodiment of the present application. Referring to Figure 6, the electronic cigarette includes: a cigarette rod 601 and a microphone 602, and the microphone 602 is provided with an atomizer 603 and an electronic cigarette sensor chip 604 as provided in any embodiment of the present application. The technical principle is similar, and no longer repeat. Exemplarily, the electronic cigarette sensor chip 604 is arranged in the airflow channel of the microphone head 602, the electronic cigarette sensor chip 604 is electrically connected with the main board 605, and transmits the output voltage to the drive control circuit of the main board 605 to control the atomizer 603 working status.

Claims

A method for controlling electronic cigarettes, comprising:

Obtain the detection pressure of the electronic cigarette; wherein, the detection pressure is jointly determined by the pressure of the airflow channel and the external environment pressure;

According to the change law of the detected pressure, it is judged that the electronic cigarette is in a smoking state or a non-smoking state;

In response to the electronic cigarette being in a non-smoking state and the detected pressure changes, updating the baseline according to the change of the detected pressure, so that the baseline matches the initial value of the detected pressure;

In response to the e-cigarette being in a smoking state, the baseline is not updated.
The control method of the electronic cigarette according to claim 1, wherein said detecting the change law of the pressure comprises:

In response to the detected pressure being lowered for a preset time and then increased, the electronic cigarette is in a smoking state;

The electronic cigarette is in a non-smoking state in response to the detected pressure being lowered and not increasing for a preset time.
The control method of the electronic cigarette according to claim 1, wherein said detecting the change law of the pressure comprises:

In response to the decrease in the detected pressure, and within a first preset number of sampling times, the detected pressure decreases to a value less than a first threshold pressure, and the electronic cigarette is in a smoking state;

In response to the decrease of the detected pressure, and within the first preset number of sampling times, the detected pressure does not decrease to a value less than the first threshold pressure, the electronic cigarette is in a non-smoking state; and in response to the The detection pressure is less than the value of the second threshold pressure and greater than the value of the first threshold pressure within the second consecutive preset sampling times, and the baseline is updated; wherein the second threshold pressure is greater than the first threshold pressure, The second preset sampling times are greater than the first preset sampling times.
The control method of the electronic cigarette according to claim 3, wherein said detecting the change law of the pressure further comprises:

In response to the increase of the detected pressure, and within the first preset sampling times, the detected pressure does not increase to a value greater than the absolute value of the first threshold pressure, the electronic cigarette is in a non-smoking state and updating the baseline in response to the detected pressure being smaller than the absolute value of the second threshold pressure within a second consecutive preset number of sampling times.
The electronic cigarette control method according to any one of claims 1-4, wherein said updating the baseline includes:

in response to said detected pressure increase, said baseline is increased;

In response to the detected pressure decrease, the baseline is decreased.
The electronic cigarette control method according to claim 5, wherein the variation of the baseline is: the average value of the detected pressure of the second preset sampling times.
An electronic cigarette sensing chip, comprising: a pressure sensing element and a processing module;

The pressure sensing element is configured to detect the pressure difference between the airflow channel and the external environment; the processing module is configured to implement the electronic cigarette control method according to any one of claims 1-6.
The electronic cigarette sensor chip according to claim 7, wherein the processing module comprises:

A logic judging unit, configured to judge whether the electronic cigarette is in a smoking state or a non-smoking state according to the change rule of the detected pressure;

A baseline updating unit, configured to update the baseline according to the change of the detected pressure when the electronic cigarette is in a non-smoking state and the detected pressure changes, so that the baseline matches the initial value of the detected pressure; When the e-cigarette is in the smoking state, the baseline is not updated.
The electronic cigarette sensing chip according to claim 7, wherein the pressure sensing element is a capacitive pressure sensing element, and the processing module includes:

a capacitance-frequency conversion unit configured to convert the capacitance value detected by the pressure sensing element into a measurement frequency;

Reference frequency unit, set to output reference frequency;

A frequency measurement unit configured to determine the detection pressure according to the measurement frequency and the reference frequency.
The electronic cigarette sensor chip according to claim 7, wherein the processing module comprises:

a non-volatile memory configured to store threshold setting parameters and sensitivity calibration parameters;

The port control unit is configured to output an interruption signal and a pressure signal according to the detected pressure and the judging result that the electronic cigarette is in a smoking state or a non-smoking state.
An electronic cigarette, comprising: a cigarette rod and a microphone, the atomizer and the electronic cigarette sensor chip according to any one of claims 7-10 are arranged in the microphone.