CN108827372B - Electronic cigarette state detection circuit, detection method and electronic cigarette - Google Patents
Electronic cigarette state detection circuit, detection method and electronic cigarette Download PDFInfo
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- CN108827372B CN108827372B CN201810234722.1A CN201810234722A CN108827372B CN 108827372 B CN108827372 B CN 108827372B CN 201810234722 A CN201810234722 A CN 201810234722A CN 108827372 B CN108827372 B CN 108827372B
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Abstract
The invention relates to an electronic cigarette state detection circuit, a detection method and an electronic cigarette. The method comprises S10: detecting the received level by a time division multiplexing detection port of the processor; s20: if the time division multiplexing detection port detects a low level, the control switch is switched on; s30: starting a voltage detection circuit to detect the electric quantity and displaying an electric quantity detection result; s40: the processor detects whether a smoking action signal exists; s50: if the smoking action signal is detected, the time division multiplexing detection port detects the working state of the electronic cigarette and feeds the working state back to the user; s60: if the tdm detection port detects the high level, the control switch is turned off, and the process returns to step S10, and the tdm detection port restarts detecting the received level. By implementing the invention, the detection of the electric quantity and the working state of the electronic cigarette can be realized only by one time division multiplexing detection port, and the consumption of an IO port is reduced, thereby reducing the volume of the electronic cigarette and reducing the cost.
Description
Technical Field
The invention relates to the field of electronic cigarettes, in particular to an electronic cigarette state detection circuit, a detection method and an electronic cigarette.
Background
The electronic cigarette is also known as a virtual cigarette and an electronic atomizer. The electronic cigarette is used as a substitute for cigarette products and is mainly used for quitting smoking. Electronic cigarettes have an appearance and taste similar to cigarettes, but generally do not contain other harmful components such as tar, aerosols, etc. in cigarettes. The electronic cigarette mainly comprises an atomizer (microphone/cigarette holder/cartridge) and a power supply component. However, with the development of electronic cigarettes, the electronic cigarettes have increasingly diversified shapes, and in order to meet the requirements of various shapes, the area of the electronic cigarette circuit board needs to be reduced.
At present, the electronic cigarette usually obtains the electric quantity value and the working state of the electronic cigarette through key pressing, but there are no more keys in the space layout of the small electronic cigarette, and the setting of the buttons can increase the volume and the weight of the electronic cigarette and also affect the beauty.
Disclosure of Invention
The invention aims to solve the technical problem of providing an electronic cigarette state detection circuit, a detection method and an electronic cigarette aiming at the defect that the detection of the electric quantity value and the working state of the electronic cigarette in the prior art needs a key.
The technical scheme adopted by the invention for solving the technical problems is as follows: the electronic cigarette state detection circuit comprises an electronic cigarette battery, a processor, a pull-up resistor, a control switch, a cigarette cartridge interface and a voltage detection circuit, wherein the processor comprises a time division multiplexing detection port; the time division multiplexing detection port is connected with the electronic cigarette battery through the pull-up resistor, the time division multiplexing detection port is connected with the negative electrode of the electronic cigarette battery through the cigarette cartridge interface, and one end of the cigarette cartridge interface is grounded; the time division multiplexing detection port is connected with the anode of the electronic cigarette battery through the control switch, and the processor is connected with the voltage detection circuit;
after the smoke cartridge is inserted into the smoke cartridge interface, the time division multiplexing detection port detects a low level, the time division multiplexing detection port is configured to be in an analog-to-digital conversion input mode, a control switch is switched on, the voltage detection circuit is started to detect electric quantity, and an electric quantity detection result is displayed;
after the cigarette cartridge is inserted, when the processor detects a smoking action signal, the time division multiplexing detection port is configured to be in a non-analog-to-digital conversion input mode, and the time division multiplexing detection port detects the working state of the electronic cigarette and feeds the working state back to a user;
after the cigarette cartridge is pulled out of the cigarette cartridge interface, the time division multiplexing detection port detects a high level, the control switch is switched off, and the time division multiplexing detection port detects whether the cigarette cartridge is inserted or not.
Preferably, the electronic cigarette state detection circuit of the present invention further includes an airflow sensor connected to the processor and configured to detect whether there is a smoking action, and the airflow sensor generates the smoking action signal when detecting that there is an airflow passing through; or
The resistance detection circuit is connected with the processor and used for detecting whether a user has smoking action, and the smoking action signal is generated by detecting the change of the resistance value; or
And the capacitance detection circuit is connected with the processor and is used for detecting whether smoking action exists or not, and the smoking action signal is generated by detecting the change of the capacitance value.
Preferably, the electronic cigarette state detection circuit further comprises a feedback module for feeding back the detected electric quantity detection result and the working state to the user; the feedback module is at least one of an indicator light, an audio player or a display screen;
the working state of the electronic cigarette comprises at least one of a short-circuit state, an overcurrent state and an open-circuit state.
In addition, the invention also provides an electronic cigarette state detection method, which is applied to the electronic cigarette state detection circuit and comprises the following steps:
s10: detecting the received level by a time division multiplexing detection port of the processor;
s20: if the time division multiplexing detection port detects a low level, the control switch is switched on;
s30: starting a voltage detection circuit to detect the electric quantity and displaying an electric quantity detection result;
s40: the processor detects whether a smoking action signal exists;
s50: and if the smoking action signal is detected, the time division multiplexing detection port detects the working state of the electronic cigarette and feeds the working state back to the user.
Preferably, in the method for detecting the status of the electronic cigarette according to the present invention, the step S20 includes:
s201: and if the time division multiplexing detection port detects low level, configuring the time division multiplexing detection port into an analog-to-digital conversion input mode, and switching on a control switch.
Preferably, in the method for detecting the status of the electronic cigarette according to the present invention, the step S40 includes:
s401: detecting the change of the air flow through an air flow sensor to judge whether a smoking action signal exists or not; or
S402: whether a smoking action signal exists is judged by detecting the change of the resistance value or the change of the capacitance value.
Preferably, in the method for detecting the status of the electronic cigarette according to the present invention, the step S50 includes:
s501: if the smoking action signal is detected, configuring the time division multiplexing detection port into a non-analog-to-digital conversion input mode, and simultaneously accessing the time division multiplexing detection port to an analog-to-digital converter to detect the working state of the electronic cigarette;
the working state comprises at least one of a short circuit state, an overcurrent state and an open circuit state.
Preferably, the method for detecting the status of the electronic cigarette according to the present invention further includes, after step S50:
s60: if the tdm detection port detects a high level, the control switch is turned off, and the process returns to step S10, where the tdm detection port restarts detecting the received level.
Preferably, in the method for detecting the status of the electronic cigarette according to the present invention, the step S30 of displaying the detection result includes displaying the detection result through the number of indicator lights, the color of the indicator lights, or a display screen; and/or
The step S50 of feeding back to the user includes feeding back to the user through the number of indicator lights, or the color of the indicator lights, or the display screen.
In addition, the invention also provides an electronic cigarette which comprises the electronic cigarette state detection circuit.
The electronic cigarette state detection circuit, the electronic cigarette state detection method and the electronic cigarette have the following beneficial effects that: the method comprises S10: detecting the received level by a time division multiplexing detection port of the processor; s20: if the time division multiplexing detection port detects a low level, the control switch is switched on; s30: starting a voltage detection circuit to detect the electric quantity and displaying an electric quantity detection result; s40: the processor detects whether a smoking action signal exists; s50: if the smoking action signal is detected, the time division multiplexing detection port detects the working state of the electronic cigarette and feeds the working state back to the user; s60: if the tdm detection port detects the high level, the control switch is turned off, and the process returns to step S10, and the tdm detection port restarts detecting the received level. By implementing the invention, the detection of the electric quantity and the working state of the electronic cigarette can be realized only by one time division multiplexing detection port, and the consumption of an IO port is reduced, thereby reducing the volume of the electronic cigarette and reducing the cost.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a voltage detection circuit diagram of an electronic cigarette state detection circuit according to the present invention;
fig. 2 is a circuit diagram of the electronic cigarette status detection circuit according to the present invention.
Figure 3 is a flow chart of a method for detecting the status of an e-cigarette according to a first embodiment of the present invention;
fig. 4 is a flowchart of a method for detecting the status of an electronic cigarette according to a second embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to figures 1 and 2, the electronic cigarette status detection circuit is applied to an electronic cigarette that includes a battery for powering the electronic cigarette. The electronic cigarette state detection circuit comprises a processor (MCU), a pull-up resistor, a control switch, a cigarette cartridge interface and a voltage detection circuit, wherein the processor comprises a time division multiplexing detection port (INPUT IO), the time division multiplexing detection port carries out different detection works at different working stages of the electronic cigarette, and the multi-task detection is completed through time division multiplexing. Further, when the electronic cigarette stops working, a time division multiplexing detection port is set to have a cigarette bullet plugging detection function, and when a user plugs a cigarette bullet, prompt information can be timely output; when the electronic cigarette works, the time division multiplexing detection port is set as a real-time detection task, and short circuit state detection, overcurrent state detection, open circuit state detection and the like can be carried out.
In order to realize the time division multiplexing to complete the multi-task detection, the processor also comprises a time division multi-task scheduling management kernel which can select to execute different tasks according to a switching signal, wherein the switching signal is a high level, a low level or a smoking action signal, and the like, and the corresponding relation between the tasks and the switching signal is preset in the processor. The time division multiplexing detection port is connected with the electronic cigarette battery through a pull-up resistor, and the resistance value of the pull-up resistor can be set according to requirements. The time division multiplexing detection port is connected with the negative electrode of the electronic cigarette battery through the cigarette cartridge interface, and one end of the cigarette cartridge interface is grounded. The time division multiplexing detection port is connected with the anode of the electronic cigarette battery through the control switch, the processor is connected with the voltage detection circuit, and the control switch is switched on or off according to a signal sent by the processor.
The cigarette bullet interface is used for connecting the cigarette bullet, and the cigarette bullet is equivalent to corresponding resistance access circuit after inserting. After the smoke cartridge is inserted into the smoke cartridge interface, the time division multiplexing detection port detects a low level, the time division multiplexing detection port is configured to be in an analog-to-digital conversion input mode at the moment, the control switch is switched on, the voltage detection circuit is started to detect the electric quantity, and an electric quantity detection result is displayed.
After the cigarette cartridge is inserted into the cigarette cartridge interface, when the processor detects a smoking action signal, the time division multiplexing detection port is configured to be in a non-Analog-to-Digital conversion input mode and is simultaneously connected to an Analog-to-Digital Converter (ADC), and the time division multiplexing detection port detects the working state of the electronic cigarette and feeds the working state back to a user. Preferably, the operating state of the electronic cigarette comprises at least one of a short circuit state, an overcurrent state and an open circuit state.
Furthermore, the invention can detect whether the user has smoking action in the following three ways, and if the smoking action signal is detected, the user smokes.
In a first detection mode, the electronic cigarette state detection circuit of the present invention further includes an airflow sensor connected to the processor for detecting whether there is a smoking operation, and generates a smoking operation signal when it is detected that there is an airflow passing through the airflow sensor.
In a second detection mode, the electronic cigarette state detection circuit further includes a resistance detection circuit connected to the processor for detecting whether a user has a smoking action, and generates a smoking action signal by detecting a change in the resistance value.
In a third detection mode, the electronic cigarette state detection circuit further includes a capacitance detection circuit connected to the processor and configured to detect whether a smoking operation is performed, and the smoking operation signal is generated by detecting a change in capacitance value.
Further, the electronic cigarette state detection circuit further comprises a feedback module for feeding back the detected electric quantity detection result and the working state to the user. The feedback module may optionally use at least one of an indicator light, an audio player, or a display screen. For example, by indicating the number of lights, or the color of the lights, audio player or display screen.
When the user finishes smoking or replaces the cartridge, the time division multiplexing detection port detects a high level after the cartridge is pulled out of the cartridge interface, the control switch is switched off, and the time division multiplexing detection port detects whether the cartridge is inserted or not.
In summary, the electronic cigarette status detection circuit of the present invention is completed based on a single IO port, the processor includes a time division multitask scheduling management kernel, the IO port performs different detection operations at different operation stages of the electronic cigarette, and the multitask detection is completed through time division multiplexing.
Fig. 3 is a flowchart of a method for detecting the status of an electronic cigarette according to a first embodiment of the present invention.
Specifically, the invention further provides an electronic cigarette state detection method applied to the electronic cigarette state detection circuit, which includes the following steps:
s10: a time division multiplexed detection port of the processor detects the received level. When the electronic cigarette stops working, the time division multiplexing detection port of the processor is in a cigarette cartridge detection state and is used for detecting whether a cigarette cartridge is inserted. When no cartridge is inserted, the level of the input port is high; when a smoke cartridge is inserted, the level of the input port changes to low level, and the processor judges that the smoke cartridge is inserted by detecting the received level change.
S20: and if the time division multiplexing detection port detects low level, namely a smoke cartridge is inserted, the control switch is switched on. Preferably, in the electronic cigarette status detection method of the present invention, step S20 includes:
s201: and if the time division multiplexing detection port detects low level, configuring the time division multiplexing detection port into an analog-to-digital conversion input mode, and conducting the control switch. When the electronic cigarette is in a standby state, configuring the time division multiplexing detection port into a pull-up input mode; the time division multiplexing detection port will detect a low level when the cartridge is accessed, otherwise a high level is detected.
S30, starting the voltage detection circuit to detect the electric quantity and displaying the electric quantity detection result, furthermore, in the electronic cigarette state detection method, the step S30 of displaying the detection result comprises displaying the detection result through the number of indicator lamps, or the colors of the indicator lamps or a display screen, for example, different electric quantities are represented through different colors of L ED lamps, or the detection result is displayed through a small display screen.
S40: the processor detects whether there is a smoking action signal. Preferably, in the electronic cigarette status detection method of the present invention, step S40 includes:
s401: whether a smoking action signal exists is judged by detecting the airflow change through the airflow sensor, and when the airflow value detected by the airflow sensor is larger than the preset airflow value, the smoking action signal exists. Or
S402: whether a smoking action signal exists is judged by detecting the change of the resistance value or the change of the capacitance value. Comparing the detected resistance value with a preset resistance value, and judging whether the user has smoking action; or comparing the detected capacitance value with a preset capacitance value to judge whether the user has smoking action. It can be understood that the preset resistance value and the preset capacitance value need to be obtained in advance through experiments, and the comparison table of the preset resistance value and the smoking state is stored in the memory of the electronic cigarette.
S50: and if the smoking action signal is detected, the time division multiplexing detection port detects the working state of the electronic cigarette and feeds the working state back to the user.
Alternatively, in the electronic cigarette status detection method of the present invention, step S50 includes:
s501: if the smoking action signal is detected, the time division multiplexing detection port is configured to be in a non-Analog-to-Digital conversion input mode, and is connected to an Analog-to-Digital Converter (ADC) at the same time to detect the working state of the electronic cigarette. The working state comprises at least one of a short circuit state, an overcurrent state and an open circuit state.
Alternatively, in the electronic cigarette status detecting method of the present invention, the step of feeding back to the user in S50 includes feeding back to the user through the number of indicator lights, or the color of the indicator lights, or the display screen, for example, different colors of the L ED lights are used to indicate different amounts of power, or the display is performed through a small display screen.
Fig. 4 is a flowchart of a method for detecting the status of an electronic cigarette according to a second embodiment of the present invention.
The difference from the first embodiment is that the electronic cigarette state detection method of the present embodiment further includes, after step S50:
s60: if the tdm detection port detects the high level, the control switch is turned off, and the process returns to step S10, and the tdm detection port restarts detecting the received level.
In addition, the invention also provides an electronic cigarette which comprises the electronic cigarette state detection circuit.
By implementing the invention, the detection of the electric quantity and the working state of the electronic cigarette can be realized only by one time division multiplexing detection port, the consumption of an IO port is reduced, and the cigarette cartridge can be inserted without setting a solid key. Because the consumption of the IO port is reduced, a processor with smaller package can be used, and therefore the volume of the electronic cigarette is reduced; and the small-package processor is relatively low in price, so that the cost can be reduced.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. An electronic cigarette state detection circuit comprises an electronic cigarette battery and is characterized by further comprising a processor, a pull-up resistor, a control switch, a cigarette cartridge interface and a voltage detection circuit, wherein the processor comprises a time division multiplexing detection port; the time division multiplexing detection port is connected with the electronic cigarette battery through the pull-up resistor, the time division multiplexing detection port is connected with the negative electrode of the electronic cigarette battery through the cigarette cartridge interface, and one end of the cigarette cartridge interface is grounded; the time division multiplexing detection port is connected with the anode of the electronic cigarette battery through the control switch, and the processor is connected with the voltage detection circuit;
after the smoke cartridge is inserted into the smoke cartridge interface, the time division multiplexing detection port detects a low level, the time division multiplexing detection port is configured to be in an analog-to-digital conversion input mode, a control switch is switched on, the voltage detection circuit is started to detect electric quantity, and an electric quantity detection result is displayed;
after the cigarette cartridge is inserted, when the processor detects a smoking action signal, the time division multiplexing detection port is configured to be in a non-analog-to-digital conversion input mode, and the time division multiplexing detection port detects the working state of the electronic cigarette and feeds the working state back to a user;
after the cigarette cartridge is pulled out of the cigarette cartridge interface, the time division multiplexing detection port detects a high level, the control switch is switched off, and the time division multiplexing detection port detects whether the cigarette cartridge is inserted or not.
2. The electronic cigarette status detection circuit of claim 1, further comprising an airflow sensor connected to the processor for detecting a smoking action, the airflow sensor generating the smoking action signal when a flow of air is detected; or
The resistance detection circuit is connected with the processor and used for detecting whether a user has smoking action, and the smoking action signal is generated by detecting the change of the resistance value; or
And the capacitance detection circuit is connected with the processor and is used for detecting whether smoking action exists or not, and the smoking action signal is generated by detecting the change of the capacitance value.
3. The electronic cigarette state detection circuit of claim 1, further comprising a feedback module for feeding back the detected power detection result and the operating state to a user; the feedback module is at least one of an indicator light, an audio player or a display screen;
the working state comprises at least one of a short circuit state, an overcurrent state and an open circuit state.
4. An electronic cigarette state detection method applied to the electronic cigarette state detection circuit according to any one of claims 1 to 3, comprising the steps of:
s10: detecting the received level by a time division multiplexing detection port of the processor;
s20: if the time division multiplexing detection port detects a low level, the control switch is switched on;
s30: starting a voltage detection circuit to detect the electric quantity and displaying an electric quantity detection result;
s40: the processor detects whether a smoking action signal exists;
s50: and if the smoking action signal is detected, the time division multiplexing detection port detects the working state of the electronic cigarette and feeds the working state back to the user.
5. The electronic cigarette status detection method according to claim 4, wherein the step S20 includes:
s201: and if the time division multiplexing detection port detects low level, configuring the time division multiplexing detection port into an analog-to-digital conversion input mode, and switching on a control switch.
6. The electronic cigarette status detection method according to claim 4, wherein the step S40 includes:
s401: detecting the change of the air flow through an air flow sensor to judge whether a smoking action signal exists or not; or
S402: whether a smoking action signal exists is judged by detecting the change of the resistance value or the change of the capacitance value.
7. The electronic cigarette status detection method according to claim 4, wherein the step S50 includes:
s501: if the smoking action signal is detected, configuring the time division multiplexing detection port into a non-analog-to-digital conversion input mode, and simultaneously accessing the time division multiplexing detection port to an analog-to-digital converter to detect the working state of the electronic cigarette;
the working state comprises at least one of a short circuit state, an overcurrent state and an open circuit state.
8. The electronic cigarette status detection method according to claim 4, further comprising, after step S50:
s60: if the tdm detection port detects a high level, the control switch is turned off, and the process returns to step S10, where the tdm detection port restarts detecting the received level.
9. The electronic cigarette status detecting method according to claim 4, wherein the displaying the detection result in step S30 includes displaying the detection result by the number of indicator lights, the color of the indicator lights, or a display screen; and/or
The step S50 of feeding back to the user includes feeding back to the user through the number of indicator lights, or the color of the indicator lights, or the display screen.
10. An electronic cigarette, characterized by comprising the electronic cigarette state detection circuit according to any one of claims 1 to 3.
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| CN201810234722.1A CN108827372B (en) | 2018-03-21 | 2018-03-21 | Electronic cigarette state detection circuit, detection method and electronic cigarette |
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