Control method of pressure sensor, pressure event judgment system, electronic equipment and chip
The control method for pressure sensors addresses baseline capacitance drift by synchronously detecting pressure and contact events to accurately identify target pressure events, reducing power consumption and hardware costs through simplified circuit design.
Patent Information
- Application Number
- CN202411253969.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2024-12-27
AI Technical Summary
Pressure sensors based on capacitor plate deformation are prone to baseline capacitance drift due to interference factors, leading to false detections and continuous capacitance value changes, which existing compensation methods either consume excessive power or incur high hardware costs.
A control method that synchronously detects pressure and contact events to determine target pressure events, calibrating the capacitance baseline when necessary, using a contact sensor to assist in identifying interference and trigger compensation operations.
Reduces power consumption and design complexity by minimizing frequent periodic compensation, avoids miscompensation of target pressure events, and simplifies circuit design by processing capacitive sensors similarly, thereby lowering hardware and power costs.
Smart Images
Figure CN119197825A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of sensor technology, and in particular to a control method for a pressure sensor, a pressure event judgment system, an electronic device and a chip. Background Art
[0002] In various application scenarios, such as smart devices, medical equipment, sports equipment, etc., sensors are usually needed to detect various pressure events. Pressure sensors are a common sensor used to measure the pressure on an object.
[0003] Pressure sensors are usually based on the principle of capacitor plate deformation (such as Figure 1 At least one plate of the capacitor can be deformed due to pressure, thereby changing the distance between the capacitor plates and thus changing the capacitance.
[0004] The pressure input types of pressure sensors usually include gas pressure and non-gas pressure (such as Figure 1 As shown in the figure, the gas pressure sensor is usually provided with a gas hole on one of the plates of the capacitor in terms of structure, and the negative or positive pressure of the gas exerts pressure on the other plate through the gas hole, thereby causing the deformation of the other plate, thereby causing the capacitance to change. For non-gas pressure sensors, it is usually directly applied by solid or liquid substances to the capacitor plates to cause deformation.
[0005] However, no matter what type of pressure input, as long as it is a pressure sensor based on the principle of capacitor plate deformation, it may be affected by other interference factors, causing unexpected deformation of the capacitor plate and causing the capacitance value to drift. On the one hand, this drift of the capacitance value may cause the detected pressure event to not necessarily be generated by the expected pressure source (but by interference), resulting in false detection; on the other hand, the change in capacitance value may be continuous, irreversible, and constantly superimposed, thus affecting the normal pressure sensing process. This effect is called baseline capacitance drift. For example, Figure 2 As shown in the figure, a possible interference factor is impurity deposition. Impurities can be solid, liquid, or formed by liquefaction or solidification of gas. The sources of impurities may be various, such as introduced from the outside or caused by aging inside the sensor. In short, impurities will cause the capacitor plates to deform, thereby changing the capacitance value, that is, causing the baseline capacitance to drift. Since impurities are usually difficult to remove and may accumulate more and more, the capacitance value of the sensor will continue to drift over time. This drift is usually difficult to predict and does not follow a specific rule.
[0006] Therefore, a technical solution is needed to eliminate the baseline capacitance drift problem of the pressure sensor based on the principle of capacitor plate deformation and avoid false detection of the sensor system caused by interference sources.
[0007] Usually, the capacitance value of the pressure sensor can be sampled periodically by using a circuit (or chip), and then the sampled baseline capacitance drift is compensated or eliminated by the sensing or calculation unit inside the circuit (or chip). However, this periodic compensation and elimination method has the following disadvantages:
[0008] First, if the cycle is short, the circuit (or chip) will frequently perform baseline capacitance compensation elimination, which will result in large hardware overhead and power consumption; if the cycle is long, the capacitance baseline drift within the long cycle will have a large impact.
[0009] Secondly, periodic compensation elimination may incorrectly compensate or eliminate the capacitance change caused by the desired target pressure event. To solve this new problem, the circuit (or chip) needs to be equipped with the function of distinguishing between pressure events and interference, but this in turn involves additional hardware costs and power consumption brought about by more complex circuit design.
[0010] Another solution is to use the calculation unit inside the circuit (or chip) to perform pattern judgment on the sampled capacitance value, that is, to judge whether the change in the capacitance value is caused by interference or by the expected target pressure event. However, this pattern judgment method has the following disadvantages:
[0011] First, if a simple mode judgment method is used, such as a simple calculation formula or logical judgment, misjudgment may occur, that is, the capacitance mutation caused by interference is mistaken as a target pressure event, or the target pressure event is mistaken as interference.
[0012] Secondly, if a complex pattern judgment method is adopted, such as a combination of complex filtering algorithms, machine learning, artificial intelligence and other computing methods, although the probability of misjudgment is greatly reduced, the hardware cost and power consumption cost are very high.
[0013] Therefore, it is necessary to improve the existing solution to the baseline capacitance drift problem. Summary of the invention
[0014] In view of the above problems, the present invention provides a control method for a pressure sensor, comprising the steps of:
[0015] Detect whether a pressure event occurs, detect whether a contact event occurs;
[0016] If both occur, the pressure event is determined to be a target pressure event; if not, the capacitance baseline of the pressure sensor is calibrated.
[0017] In order to achieve the above-mentioned object of the invention, the present invention provides a control method of a pressure sensor, comprising the steps of:
[0018] Detect whether pressure events and contact events occur synchronously / simultaneously;
[0019] If so, determine that the pressure event is a target pressure event; if not, calibrate the capacitance baseline of the pressure sensor.
[0020] In order to achieve the above-mentioned object of the invention, the present invention provides a control method of a pressure sensor, comprising the steps of:
[0021] Detect whether a pressure event occurs;
[0022] If so, detect whether a contact event occurs;
[0023] If so, determine that the pressure event is a target pressure event; if not, calibrate the capacitance baseline of the pressure sensor.
[0024] In order to achieve the above-mentioned purpose of the invention, the present invention provides a pressure event judgment system, including a contact sensor, a pressure sensor and a control circuit, the contact sensor is used to detect whether a contact event occurs, the pressure sensor is used to detect whether a pressure event occurs, the control circuit is electrically connected to the contact sensor and the pressure sensor respectively, and can determine whether the pressure event is a target pressure event based on whether both the pressure event and the contact event occur within a preset time, and calibrate the capacitance baseline of the pressure sensor when the pressure event is not a target pressure event.
[0025] Optionally, the control circuit includes a first information sensing circuit, a second information sensing circuit, a first information processing circuit, a second information processing circuit and a signal baseline calibration circuit, wherein the first information sensing circuit is configured to be connected to the contact sensor and to the first information processing circuit, and is capable of receiving the sensing signal of the contact sensor and sending the corresponding signal to the first information processing circuit, the second information sensing circuit is configured to be connected to the pressure sensor and to the second information processing circuit, and is capable of receiving the sensing signal of the pressure sensor and sending the corresponding signal to the second information processing circuit, the first information processing circuit and the second information processing circuit are connected to the signal baseline calibration circuit, and are capable of determining whether a target pressure event occurs and / or performing a baseline calibration based on the signal processed by the first information processing circuit and the second information processing circuit.
[0026] Optionally, the control circuit includes: a multiplexer, an information sensing circuit, an information processing circuit and a signal baseline calibration circuit, the input end of the multiplexer is configured to be connected to the output ends of the contact sensor and the pressure sensor, the output end of the multiplexer is connected to the input end of the information sensing circuit, the output end of the information sensing circuit is connected to the input end of the information processing circuit, and the output end of the information processing circuit is connected to the input end of the signal baseline calibration circuit.
[0027] In order to achieve the above-mentioned purpose of the invention, the present invention provides a pressure event determination system, which applies the above-mentioned pressure sensor control method to determine whether a pressure event occurs.
[0028] In order to achieve the above-mentioned purpose of the invention, the present invention provides an electronic device, which applies the control method of the pressure sensor described above, or is equipped with the pressure event judgment system described above.
[0029] Optionally, the electronic device is an electronic cigarette, the pressure sensor is arranged at a microphone switch of the electronic cigarette, and the contact sensor is arranged at a mouthpiece of the electronic cigarette.
[0030] In order to achieve the above-mentioned object of the invention, the present invention provides a chip integrating the control circuit mentioned above.
[0031] In summary, the pressure sensor control method and pressure event judgment system provided by the present invention have at least the following technical effects:
[0032] First, the contact sensor assists the pressure sensor in identifying interference, and then triggers the circuit (or chip) to perform baseline capacitance drift compensation or elimination operations. Compared with frequent periodic compensation or elimination, this not only reduces the power consumption and design complexity of the circuit (or chip) (the hardware cost is proportional to the complexity), but also avoids the miscompensation of the pressure sensor capacitance changes caused by the target pressure event.
[0033] Secondly, contact sensors and pressure sensors are both capacitive sensors and belong to the same category. Therefore, the circuit (or chip) processes them in a similar or even identical way, which helps to simplify the design of the circuit (or chip), or the same circuit (or chip) can be used in turn to process the information of the two types of sensors separately at staggered times. In this way, the hardware cost and power consumption cost of the system composed of pressure sensors, contact sensors and circuits (or chips) can be further reduced.
[0034] Thirdly, the touch sensor is the simplest parallel plate capacitor structure, and it is a passive device (ie, it does not consume energy itself), which further saves the hardware cost and power consumption cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 This is the principle structure diagram of the capacitive pressure sensor.
[0036] Figure 2 This is the principle structure diagram of the capacitive pressure sensor when baseline drift occurs.
[0037] Figure 3 It is the principle and equivalent circuit structure diagram of capacitive touch sensor.
[0038] Figure 4 It is a flowchart of a method for controlling a pressure sensor provided in an embodiment of the present invention.
[0039] Figure 5 It is a schematic diagram of the circuit structure of the pressure event detection system provided in an embodiment of the present invention.
[0040] Figure 6 It is a flowchart of another pressure sensor control method provided by an embodiment of the present invention.
[0041] Figure 7 yes Figure 5 Schematic diagram of the circuit structure of the control circuit in the medium-pressure event detection system.
[0042] Figure 8 yes Figure 6 Schematic diagram of sensor detection timing corresponding to the control method of the medium pressure sensor.
[0043] Fig. 9 It is a flow chart of another pressure sensor control method provided by the present invention.
[0044] Fig.10 yes Figure 5 Schematic diagram of the circuit structure of the control circuit in the medium-pressure event detection system.
[0045] Fig.11 yes Fig. 9 Schematic diagram of sensor detection timing corresponding to the control method of the medium pressure sensor.
[0046] Fig.12 yes Fig. 9 Schematic diagram of sensor detection timing corresponding to the control method of the medium pressure sensor.
[0047] Fig.13 yes Fig.10 Schematic diagram of the circuit structure of the information sensing circuit.
[0048] Fig.14 yes Fig.10 Schematic diagram of the circuit structure of the information sensing circuit.
[0049] Fig.15Schematic diagram of the structure of the electronic cigarette provided in this embodiment.
[0050] Fig.16 is a schematic diagram of the structure of the pressure button provided in this embodiment. DETAILED DESCRIPTION
[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0052] like Figure 3 As shown in the figure, it is a common structure of capacitive touch sensor, which consists of 4 layers, namely metal layer, dielectric layer, metal layer and insulating cover plate from bottom to top; the metal layer below the insulating cover plate is divided into three sections, the left and right sections are grounded together with the bottom metal layer, and the metal in the middle section is the sensing electrode of the capacitor, and a coupling capacitor C0 is formed between the sensing electrode and the grounded metal. The sensing principle is as follows: a grounded object (the example in the figure is the human body) that is close to or in contact with the insulating cover plate will attract electric field lines on the contact surface and induce capacitance CS. Usually CS is very small, so even if the human body itself has capacitance CB (CB>>VS), the capacitance value of CS after connecting CB in series is similar to the size of CS, which is then connected in parallel with C0. Therefore, the contact event causes an increase in the total capacitance CTOT, and the increase is CS. This is the principle of the touch sensor.
[0053] The total capacitance is calculated as:
[0054]
[0055] It can be seen that it is a passive simple capacitive sensor, and the prerequisite for sensing the incremental capacitance CS is the contact source that generates the contact event (for example Figure 3 The human body in the figure must share the same ground or reference potential with C0 (the common ground is equivalent to the special case of the common reference potential 0). Figure 2 The impurity-type interference source shown in does not meet this condition, so impurity deposition will not affect the sensing information of the capacitive touch sensor. This means that the touch sensor can help the pressure sensor identify such common interference sources.
[0056] Based on this, this embodiment provides a control method for a pressure sensor, such as Figure 4 As shown, the steps include:
[0057] Detect whether a pressure event occurs, detect whether a contact (preset) event occurs;
[0058] If both occur, the pressure event is determined to be a target pressure event; if not, the capacitance baseline of the pressure sensor is calibrated.
[0059] In this control method, there is no limitation on the timing of occurrence of pressure events and contact events. Specifically, the two can occur successively within a preset time, or simultaneously. The detection circuit that implements this control method can be designed accordingly based on the detection logic (occurring successively or simultaneously).
[0060] The pressure event is an event that characterizes the occurrence of pressure, including pressure determination (pressure event occurrence) caused by false triggering of the pressure sensor.
[0061] The contact event is an event in which the contact sensor outputs a signal indicating the occurrence of contact.
[0062] The target pressure event is the actual pressure event excluding the misjudged pressure events.
[0063] In different application scenarios, pressure events and target pressure events can be defined based on the performance parameters and requirements of the pressure sensor, and the distinction criterion is whether a pressing / trigger that meets the requirements actually occurs.
[0064] Among them, the pressure sensor and the contact sensor are both capacitive sensors.
[0065] The control method of the pressure sensor provided in this embodiment has at least the following technical effects:
[0066] First, the contact sensor assists the pressure sensor in identifying interference, and then triggers the circuit (or chip) to perform baseline capacitance drift compensation or elimination operations. Compared with frequent periodic compensation or elimination, this not only reduces the power consumption and design complexity of the circuit (or chip) (the hardware cost is proportional to the complexity), but also avoids the miscompensation of the pressure sensor capacitance changes caused by the target pressure event.
[0067] Secondly, contact sensors and pressure sensors are both capacitive sensors and belong to the same category. Therefore, the circuit (or chip) processes them in a similar or even identical way, which helps to simplify the design of the circuit (or chip), or the same circuit (or chip) can be used in turn to process the information of the two types of sensors separately at staggered times. In this way, the hardware cost and power consumption cost of the system composed of pressure sensors, contact sensors and circuits (or chips) can be further reduced.
[0068] Third, if Figure 3As shown, the touch sensor is the simplest parallel plate capacitor structure in structure, and it is a passive device (ie, it does not consume energy itself), which further saves the hardware cost and power consumption cost of the system.
[0069] This embodiment also provides a pressure event judgment system, such as Figure 5 As shown, it includes a contact sensor 01, a pressure sensor 02 and a control circuit 03. The contact sensor 01 is used to detect whether a contact event occurs, and the pressure sensor 02 is used to detect whether a pressure event occurs. The control circuit 03 is electrically connected to the contact sensor 01 and the pressure sensor 02 respectively, and can detect whether both a contact event and a pressure event occur within a preset time, and calibrate the capacitance baseline of the pressure sensor 02 when the pressure event is not a target pressure event.
[0070] This embodiment provides a control method for a pressure sensor, such as Figure 6 As shown, the steps include:
[0071] Detect whether pressure events and contact (preset) events occur synchronously / simultaneously;
[0072] If so, the pressure event is determined to be a target pressure event; if not, the capacitance baseline of the pressure sensor is calibrated.
[0073] Accordingly, this embodiment provides a pressure event determination system, such as Figure 7 As shown, the control circuit includes a first information sensing circuit 10, a second information sensing circuit 20, a first information processing circuit 11, a second information processing circuit 21 and a signal baseline calibration circuit 4. The first information sensing circuit 10 is configured to be connected to the contact sensor 01 and to the first information processing circuit 11, and can receive the sensing signal of the contact sensor 01 and send the corresponding signal to the first information processing circuit 11. The second information sensing circuit 20 is configured to be connected to the pressure sensor 02 and to the second information processing circuit 21, and can receive the sensing signal of the pressure sensor 02 and send the corresponding signal to the second information processing circuit 21. The first information processing circuit 11 and the second information processing circuit 21 are connected to the signal baseline calibration circuit 4, and can determine whether a target pressure event occurs and / or perform a baseline calibration based on the signal processed by the first information processing circuit 11 and the second information processing circuit 21.
[0074] Specifically, Figure 8As shown, the control circuit continuously detects the contact sensor and the pressure sensor. When the control circuit detects a contact event and a pressure event at the same time, the signal baseline calibration circuit determines that the pressure event is a target pressure event. If no contact event is detected but only a contact event is detected, the event is determined to be a false pressure event caused by interference, and the signal baseline calibration circuit performs a baseline capacitance calibration operation.
[0075] like Figure 6 The control method of the pressure sensor shown and Figure 7 The pressure event judgment system shown detects the pressure sensor and the contact sensor at the same time without missing any information, so the detection is accurate and reliable.
[0076] This embodiment provides a control method for a pressure sensor, such as Fig. 9 As shown, the steps include:
[0077] Detect whether a pressure event occurs;
[0078] If so, detect whether a contact (preset) event occurs;
[0079] If so, the pressure event is determined to be a target pressure event; if not, the capacitance baseline of the pressure sensor is calibrated.
[0080] Accordingly, this embodiment provides a pressure event determination system, such as Fig.10 As shown, the control circuit includes a multiplexer 1, an information sensing circuit 2, an information processing circuit 3 and a signal baseline calibration circuit 4. The input end of the multiplexer 1 is configured to be connected to the output ends of the contact sensor 01 and the pressure sensor 02, the output end of the multiplexer 1 is connected to the input end of the information sensing circuit 2, the output end of the information sensing circuit 2 is connected to the input end of the information processing circuit 3, and the output end of the information processing circuit 3 is connected to the input end of the signal baseline calibration circuit 4. The multiplexer 1 is used to select the contact sensor 01 or the pressure sensor 02 at a certain moment and send it to the subsequent circuit link (information sensing circuit); the information sensing circuit 2 can sense and convert the sensor signal and convert it into a paradigm (such as a digital signal) that is convenient for the circuit to process, and then it is processed, judged and controlled by the information processing circuit 3, and the signal baseline calibration circuit 4 performs a capacitance baseline compensation or elimination operation, combined with Fig.11 and Fig.12 First, the pressure sensor is selected to the control circuit. When a pressure event is detected, the contact sensor is selected to the control circuit. At this time: if no contact event is detected, it is determined that the target pressure event has not occurred, and a baseline calibration is performed through the signal baseline calibration circuit. After the calibration is completed, the pressure sensor is selected to the control circuit; if a contact event is detected, it is determined that the target pressure event has occurred. After the event is completed, the pressure sensor is selected to the control circuit.
[0081] Fig. 9 The control method of the pressure sensor shown and Fig.10 The pressure event judgment system shown adopts a time-division multiplexing signal processing method and reuses circuits, thereby saving hardware costs, not only saving costs but also reducing power consumption.
[0082] like Fig.13 As shown, Figure 7 and Fig.10 The specific implementation method of the (first / second) information sensing circuit shown in the figure may include a capacitance-voltage conversion circuit 001 and an analog-to-digital conversion circuit 002. The capacitance-voltage conversion circuit 001 is used to connect to the output end of the contact sensor / pressure sensor to convert the capacitance signal into a voltage signal. The analog-to-digital conversion circuit 002 can convert the voltage signal into a digital signal that is easy to be processed by subsequent circuits.
[0083] like Fig.14 As shown, Figure 7 and Fig.10 The specific implementation method of the (first / second) information sensing circuit shown in can also include an oscillation circuit 003 and a logic circuit 004. The oscillation circuit 003 is used to connect to the output end of the contact sensor / pressure sensor to convert the output capacitance of the sensor into a corresponding oscillation frequency. The logic circuit 004 can process the signal and transmit it to the subsequent circuit.
[0084] Optionally, this embodiment provides an electronic cigarette, such as Fig.15 As shown, it integrates the pressure event judgment system provided by the present embodiment. Specifically, the contact sensor is arranged at the mouthpiece of the electronic cigarette, and the pressure sensor is arranged at the microphone switch of the electronic cigarette. Such a design can avoid false triggering of the microphone switch. Only when the contact sensor detects (human body) contact with the mouthpiece, the pressure event of the microphone switch is determined to be a switch event (target pressure event), thereby improving the safety and reliability of the use of the electronic cigarette.
[0085] Optionally, this embodiment provides a chip integrating the control circuit described above, and the pressure sensor is controlled based on the chip, so that accurate detection and baseline calibration of target pressure events can be achieved at a lower hardware cost and power consumption.
[0086] Optionally, this embodiment provides an electronic device, using the control method of the pressure sensor provided in this embodiment, or a pressure event judgment system. Since pressure event judgment is involved in a variety of application scenarios, such as smart devices, medical devices, and sports equipment, etc., there may also be a need to perform baseline calibration after false triggering. The electronic device using the control method of the pressure sensor provided in this embodiment, or the pressure event judgment system, can achieve accurate detection of target pressure events and perform baseline calibration at a lower hardware cost and power consumption.
[0087] For example, Fig.16 As shown, when the electronic device is triggered by a pressure button, the detection of effective triggering of the pressure button can be achieved by simultaneously setting a contact sensor in the pressing area. Specifically, this embodiment does not limit the relative position relationship between the contact sensor and the pressure sensor. Those skilled in the art can make corresponding settings based on the spirit of the present invention and in combination with specific application scenarios. The above implementation modes are all within the protection scope of the present invention.
[0088] So far, the technical solution of the present invention has been described in conjunction with the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to the above-mentioned specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. A method for controlling a pressure sensor, characterized in that: Includes steps: Detect whether a pressure event occurs, detect whether a contact event occurs; If both occur, the pressure event is determined to be a target pressure event; if not, the capacitance baseline of the pressure sensor is calibrated.
2. A method for controlling a pressure sensor, characterized in that: Includes steps: Detect whether pressure events and contact events occur synchronously / simultaneously; If so, determine that the pressure event is a target pressure event; if not, calibrate the capacitance baseline of the pressure sensor.
3. A method for controlling a pressure sensor, characterized in that: Includes steps: Detect whether a pressure event occurs; If so, detect whether a contact event occurs; If so, determine that the pressure event is a target pressure event; if not, calibrate the capacitance baseline of the pressure sensor.
4. A pressure event judgment system, characterized in that: It includes a contact sensor, a pressure sensor and a control circuit. The contact sensor is used to detect whether a contact event occurs, and the pressure sensor is used to detect whether a pressure event occurs. The control circuit is electrically connected to the contact sensor and the pressure sensor, respectively, and can determine whether the pressure event is a target pressure event based on whether both the pressure event and the contact event occur within a preset time, and calibrate the capacitance baseline of the pressure sensor when the pressure event is not a target pressure event.
5. The pressure event determination system according to claim 4, characterized in that: The control circuit includes a first information sensing circuit, a second information sensing circuit, a first information processing circuit, a second information processing circuit and a signal baseline calibration circuit. The first information sensing circuit is configured to be connected to the contact sensor and to the first information processing circuit, and can receive the sensing signal of the contact sensor and send the corresponding signal to the first information processing circuit. The second information sensing circuit is configured to be connected to the pressure sensor and to the second information processing circuit, and can receive the sensing signal of the pressure sensor and send the corresponding signal to the second information processing circuit. The first information processing circuit and the second information processing circuit are connected to the signal baseline calibration circuit, and can determine whether a target pressure event occurs and / or perform a baseline calibration based on the signal processed by the first information processing circuit and the second information processing circuit.
6. The pressure event determination system according to claim 4, characterized in that: The control circuit includes: a multiplexer, an information sensing circuit, an information processing circuit and a signal baseline calibration circuit, the input end of the multiplexer is configured to be connected to the output ends of the contact sensor and the pressure sensor, the output end of the multiplexer is connected to the input end of the information sensing circuit, the output end of the information sensing circuit is connected to the input end of the information processing circuit, and the output end of the information processing circuit is connected to the input end of the signal baseline calibration circuit.
7. A pressure event determination system, characterized in that: The control method of the pressure sensor according to any one of claims 1 to 3 is applied to determine whether a pressure event occurs.
8. An electronic device, characterized in that: A control method for a pressure sensor according to any one of claims 1 to 3 is applied, or a pressure event determination system according to any one of claims 4 to 7 is configured.
9. The electronic device according to claim 8, characterized in that: The electronic device is an electronic cigarette, the pressure sensor is arranged at the microphone switch of the electronic cigarette, and the contact sensor is arranged at the mouthpiece of the electronic cigarette.
10. A chip, characterized in that: The control circuit according to any one of claims 4 to 6 is integrated.