WO2021031866A1

WO2021031866A1 - Pressure measurement circuit, electronic device and method for controlling pressure measurement circuit

Info

Publication number: WO2021031866A1
Application number: PCT/CN2020/107398
Authority: WO
Inventors: 谭琴
Original assignee: 维沃移动通信有限公司
Priority date: 2019-08-21
Filing date: 2020-08-06
Publication date: 2021-02-25
Also published as: CN110597411A; CN110597411B

Abstract

Disclosed are a pressure measurement circuit, an electronic device and a method for controlling the pressure measurement circuit. The pressure measurement circuit comprises: at least one first measurement unit (10), wherein the first measurement unit (10) is used for sensing an acting force in a first direction; at least one second measurement unit (20), wherein the second measurement unit (20) is used for sensing an acting force in a second direction, the first measurement unit (10) and the second measurement unit (20) have different sensing parameters corresponding to different acting forces, and a preset angle is formed between the first direction and the second direction; and a pressure measurement chip (30), wherein the pressure measurement chip (30) is respectively connected to the first measurement unit (10) and the second measurement unit (20), and the pressure measurement chip (30) determines a first pressure parameter in the first direction and a second pressure parameter in the second direction according to the sensing parameter of the first measurement unit (10) and the sensing parameter of the second measurement unit (20), and determines, according to the first pressure parameter and the second pressure parameter, whether to output a trigger instruction.

Description

Pressure detection circuit, electronic equipment and control method of pressure detection circuit

Cross references to related applications

This application claims the priority of Chinese Patent Application No. 201910775820.0 filed in China on August 21, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of electronic technology, and in particular to a pressure detection circuit, electronic equipment, and a control method of the pressure detection circuit.

Background technique

Currently, the appearance of electronic devices such as mobile phones and tablets is moving towards simplicity and integration. Traditional physical buttons need to be opened, which destroys the integrity of the appearance, and is gradually being replaced by hidden buttons. The hidden button realizes the button function, avoids the appearance of holes, and is conducive to the waterproof design, reducing the risk of ESD (Electro-Static Discharge).

However, the hidden buttons in the related technology still transmit pressure trigger commands under the action of bending, torsion, etc., and there is a serious mistouch situation, which affects the user experience.

Summary of the invention

The present disclosure provides a pressure detection circuit, an electronic device, and a control method of the pressure detection circuit, so as to solve the problem that the pressure sensor in the related art has a serious false touch.

In order to solve the above technical problems, the present disclosure is implemented as follows:

In the first aspect, embodiments of the present disclosure provide a pressure detection circuit, including:

At least one first detection unit, the first detection unit is used to sense a force in a first direction;

At least one second detection unit, the second detection unit is used to sense a force in a second direction; the first detection unit and the second detection unit have different sensing parameters corresponding to different forces; the first direction and the second direction At a preset angle;

The pressure detection chip is connected to the first detection unit and the second detection unit respectively. The pressure detection chip determines the first pressure parameter in the first direction according to the sensing parameter of the first detection unit and the sensing parameter of the second detection unit. The second pressure parameter in the second direction, and whether to output the trigger command is determined according to the first pressure parameter and the second pressure parameter.

In a second aspect, embodiments of the present disclosure provide an electronic device, including: a housing, a processor, and the aforementioned pressure detection circuit;

The pressure detection circuit and the processor are arranged inside the casing, and the pressure detection chip of the pressure detection circuit is connected with the processor.

In a third aspect, embodiments of the present disclosure provide a method for controlling a pressure detection circuit, which is applied to the above-mentioned pressure detection circuit, and includes:

Acquiring the sensing parameters of the first detection unit and the sensing parameters of the second detection unit;

Determine the first pressure parameter in the first direction and the second pressure parameter in the second direction according to the sensing parameter of the first detection unit and the sensing parameter of the second detection unit;

When the first pressure parameter and the second pressure parameter meet the preset conditions, the trigger instruction is output.

In the embodiments of the present disclosure, at least one first detection unit senses the force in the first direction, at least one second detection unit senses the force in the second direction, and the pressure detection chip is based on the sensing parameters of the first detection unit and the first direction. The sensing parameters of the second detection unit determine the first pressure parameter in the first direction and the second pressure parameter in the second direction, and determine whether to output a trigger command according to the first pressure parameter and the second pressure parameter, which can realize the The pressure detection, and then determine whether to output a trigger instruction, can avoid false triggering, and improve user experience.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the accompanying drawings used in the description of the embodiments of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

FIG. 1 shows one of the schematic diagrams of the circuit principle of the pressure detection circuit provided by the embodiment of the present disclosure;

2 shows one of the structural schematic diagrams of the pressure sensing component in the pressure detection circuit provided by the embodiment of the present disclosure;

FIG. 3 shows one of the schematic diagrams of the circuit principle of the pressure sensing component in the pressure detecting circuit provided by the embodiment of the present disclosure;

4 shows the second schematic diagram of the circuit principle of the pressure sensing component in the pressure sensing circuit provided by the embodiment of the present disclosure;

5 shows the second structural diagram of the pressure sensing component in the pressure detection circuit provided by the embodiment of the present disclosure;

6 shows the second schematic diagram of the circuit principle of the pressure detection circuit provided by the embodiment of the present disclosure;

FIG. 7 shows one of the equivalent circuit diagrams of the first detection unit in the pressure detection circuit provided by the embodiment of the present disclosure;

FIG. 8 shows one of the equivalent circuit diagrams of the second detection unit in the pressure detection circuit provided by the embodiment of the present disclosure;

9 shows the third schematic diagram of the circuit principle of the pressure detection circuit provided by the embodiment of the present disclosure;

FIG. 10 shows the second schematic diagram of the equivalent circuit of the first detection unit in the pressure detection circuit provided by the embodiment of the present disclosure;

11 shows the second schematic diagram of the equivalent circuit of the second detection unit in the pressure detection circuit provided by the embodiment of the present disclosure;

FIG. 12 shows the third equivalent circuit diagram of the first detection unit in the pressure detection circuit provided by the embodiment of the present disclosure;

FIG. 13 shows the third equivalent circuit diagram of the second detection unit in the pressure detection circuit provided by the embodiment of the present disclosure;

14 shows a schematic structural diagram of a pressure detection chip in a pressure detection circuit provided by an embodiment of the present disclosure;

FIG. 15 shows one of the schematic diagrams of the circuit principle of the electronic device provided by the embodiment of the present disclosure;

16 shows the second schematic diagram of the circuit principle of the electronic device provided by the embodiment of the present disclosure;

FIG. 17 shows one of the structural schematic diagrams of the electronic device provided by the embodiment of the present disclosure;

FIG. 18 shows the second structural diagram of an electronic device provided by an embodiment of the present disclosure;

19A to 19D show schematic diagrams of operations of exemplary operation scenarios provided by embodiments of the present disclosure;

20A to 20E show linear schematic diagrams of the first pressure parameter and the second pressure parameter in an exemplary operation scenario provided by an embodiment of the present disclosure;

FIG. 21 shows a schematic flowchart of a control method of a pressure detection circuit provided by an embodiment of the present disclosure.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present disclosure clearer, a detailed description will be given below with reference to the drawings and specific embodiments.

FIG. 1 shows one of the schematic diagrams of the circuit principle of the pressure detection circuit provided by the embodiment of the present disclosure.

Referring to FIG. 1, an embodiment of the present disclosure provides a pressure detection circuit, which may include: at least one first detection unit 10, at least one second detection unit 20, and a pressure detection chip 30.

The first detection unit 10 is used to sense the force in the first direction; the second detection unit 20 is used to sense the force in the second direction; the first detection unit 10 and the second detection unit 20 correspond to different forces Have different sensing parameters; the first direction and the second direction are at a preset angle. For simplified illustration, FIG. 1 takes a first detection unit 10 and a second detection unit 20 as an exemplary illustration, which does not represent a limitation on the number of the first detection unit 10 and the second detection unit 20 in actual use.

The pressure detection chip 30 is respectively connected to the first detection unit 10 and the second detection unit 20. The pressure detection chip 30 determines the first pressure in the first direction according to the sensing parameters of the first detection unit 10 and the second detection unit 20 Parameters and a second pressure parameter in the second direction, and determine whether to output a trigger command according to the first pressure parameter and the second pressure parameter.

In the embodiment of the present disclosure, the pressure detection circuit may include at least one first detection unit 10 and at least one second detection unit 20, which are used to sense the force in the first direction and the force in the second direction respectively. Here, The first direction and the second direction are different and have a preset angle. The preset angle can be set based on actual structural design requirements. Preferably, the preset angle can be 90 degrees. In this way, the first detection unit 10 and the second detection The unit 20 can sense forces in two perpendicular directions. The pressure detection circuit also includes a pressure detection chip 30, which is connected to the first detection unit 10 and the second detection unit 20, respectively, to obtain the sensing parameters of the first detection unit 10 and the second detection unit 20, respectively , And perform preset calculation processing according to the sensing parameters of the first detection unit 10 and the sensing parameters of the second detection unit 20 to determine the first pressure parameter in the first direction and the second pressure parameter in the second direction, and then the first pressure The parameter and the second pressure parameter are compared with a preset threshold to determine whether to output a trigger instruction.

The working process of the pressure detection circuit provided by the embodiment of the present disclosure is as follows: a situation in which at least one first detection unit 10 and at least one second detection unit 20 in the pressure detection circuit sense an external force (for example, pressing force or torque) Next, the force in the first direction is sensed by the first detection unit 10, and corresponding sensing parameters are generated based on the sensed force in the first direction; the force in the second direction is generated by the second detection unit 20 Perform sensing, and generate corresponding sensing parameters based on the sensed force in the second direction; the pressure detection chip 30 acquires the sensing parameters of the first sensing unit 10 and the sensing parameters of the second sensing unit 20, according to the first sensing The sensing parameter of the unit 10 determines the first pressure parameter in the first direction, and the second pressure parameter in the second direction is determined according to the sensing parameter of the second detection unit 20. After determining the first pressure parameter and the second pressure parameter, the pressure detection chip 30 compares the first pressure parameter and the second pressure parameter with a preset threshold to determine. Optionally, the first pressure parameter can be compared with the first preset threshold. The value M is compared, the second pressure parameter is compared with the second preset value N, and when the first pressure parameter is greater than the first preset value M, and the absolute value of the second pressure parameter is less than the second preset value N In this case, the calculated value calculated by the first pressure parameter and the second pressure parameter according to the preset algorithm is compared with the target preset value X. If the calculated value is greater than the target preset value X, a trigger command is output, otherwise it is judged as a false touch Interrupt instruction. Here, the first preset value M and the second preset value N are both positive values.

In an example, the pressure detection chip 30 may first compare the first pressure parameter with a first preset value, and if the first pressure parameter is greater than the first preset value M, then compare the second pressure parameter with the second preset value. If the absolute value of the second pressure parameter is smaller than the second preset value N, the first pressure parameter and the second pressure parameter are further calculated according to the preset algorithm The value is compared with the target preset value X, otherwise the pressure detection chip determines that it is a false touch and interrupts the instruction, that is, it is determined that the trigger instruction is not output. In this way, the amount of logic operations of the pressure detection chip 30 can be reduced, and the efficiency of logic judgment can be improved. Of course, in another example, the pressure detection chip 30 may also perform processing at the same time for comparing and judging the first pressure parameter with the first preset value M and comparing the second pressure parameter with the second preset value N.

In an example, the pressure detection chip 30 calculates the calculated value of the first pressure parameter and the second pressure parameter according to a preset algorithm, and compares it with the target preset value X to determine whether to output a trigger command in multiple ways, for example, , The absolute value of the first pressure parameter can be divided by the absolute value of the second pressure parameter to obtain the ratio of the two, and the ratio can be compared with the third preset value X1; or, the absolute value of the first pressure parameter can be compared with The absolute value of the second pressure parameter is subtracted to obtain the difference between the two, which will be compared with the fourth preset value X2; of course, the above two methods can also be adaptively combined.

It can be understood that the settings of the first preset value M, the second preset value N, and the target preset value X can be specifically set according to actual design requirements, historical experience, or through multiple experiments. Exemplarily, the first preset value M is equal to the second preset value N, and both are 400; the target preset value X is the third preset value X1, and the value is 2.

In the embodiment of the present disclosure, the force in the first direction and the force in the second direction are respectively sensed by the first detection unit 10 and the second detection unit 20, and then the pressure detection chip 30 is used according to the sensing parameters of the first detection unit 10. And the sensing parameters of the second detection unit 20, determine the first pressure parameter in the first direction and the second pressure parameter in the second direction, and determine whether to output the trigger command according to the first pressure parameter and the second pressure parameter, which can realize the pairing Pressure detection in two directions, that is, two-dimensional pressure detection is realized, and then it is determined whether to output a trigger instruction, which can avoid false triggering and improve user experience.

Optionally, in some embodiments of the present disclosure, the pressure detection circuit may include: at least two pressure sensing components arranged on a supporting sheet 40, the pressure sensing component having a first power terminal, a second power terminal, and a first power terminal. The detection end and the second detection end, the first detection end and the second detection end are respectively connected with the pressure detection chip 30; wherein, each pressure sensing component constitutes a first detection unit 10, and at least two pressure sensing components cooperate to form At least one second detection unit 20; here, one pressure sensing component constitutes a first detection unit 10, and the sensing parameters of the first detection unit 10 include: the first sensing parameter Vpx of the first detection end in the same pressure sensing component And the second sensing parameter Vnx of the second detection end; every two pressure sensing components cooperate to form a second detection unit 20, and the sensing parameters of the second detection unit 20 may include the sensing of different detection ends of the two pressure sensing components The parameter, that is, the sensing parameter of the second detection unit 20 may include the first sensing parameter Vpx of the first sensing end in one pressure sensing component and the second sensing parameter Vpx of the second sensing end in another pressure sensing component.

The pressure detection chip 30 determines the first pressure parameter in the first direction and the second pressure in the second direction according to the first sensing parameter Vpx of the first detection end and the second sensing parameter Vnx of the second detection end of the at least two pressure sensing components Parameters, and determine whether to output a trigger command according to the first pressure parameter and the second pressure parameter.

Specifically, the pressure detection chip can determine the first pressure parameter in the first direction according to the first sensing parameter Vpx of the first detection end and the second sensing parameter Vnx of the second detection end in the pressure sensing component; and, according to the two pressures The sensing parameters of different detection terminals in the sensing component are determined to determine the second pressure parameter. For example, the pressure detection chip can be based on the first sensing parameter Vpx of the first detection terminal in one of the two pressure sensing components. And the second sensing parameter Vnx of the second detection end of the other pressure sensing component of the two pressure sensing components to determine the second pressure parameter.

Referring to FIG. 2, in some alternative embodiments, the supporting sheet 40 may include a first surface and a second surface opposite to each other; the pressure sensing component may include a first strain element 51, a second strain element 52, and a third strain element. The element 53 and the fourth strain element 54, the first strain element 51 and the fourth strain element 54 are arranged on the first surface, and the second strain element 52 and the third strain element 53 are arranged on the second surface. 3, the first end of the first strain element 51 is connected to the first end of the second strain element 52, and is connected to the first power source; the second end of the second strain element 52 is connected to the fourth strain element 54 The first end is connected and connected to the first detection end; the second end of the fourth strain element 54 is connected to the second end of the third strain element 53 and is connected to the second power supply end; the first end of the third strain element 53 The end is connected with the second end of the first strain element 51 and connected with the second detection end. Here, in each pressure sensing component, the first strain element 51, the second strain element 52, the third strain element 53, and the fourth strain element 54 are connected to form a Wheatstone bridge. The resistance value of the first strain element 51, the second strain element 52, the third strain element 53, and the fourth strain element 54 changes with the change of their deformation, and the resistance change is positively correlated with the change of the deformation, that is, if If the amount of deformation becomes smaller, the resistance value becomes smaller. If the amount of deformation becomes larger, the resistance value becomes larger. That is, the resistance value of the first strain element 51, the second strain element 52, the third strain element 53, and the fourth When the strain element 54 is subjected to an external force, if the strain element is compressed, its resistance value becomes smaller, and if the strain element is stretched, its resistance value becomes larger; for example, the first strain element 51 and the second strain element 52 , The third strain element 53 and the fourth strain element 54 may be strain resistors.

Preferably, in some embodiments of the present disclosure, the first strain element 51 and the second strain element 52 are arranged oppositely, and the third strain element 53 and the fourth strain element 54 are arranged oppositely to facilitate the first strain element 51 and the second strain element 54 The element 52, the third strain element 53 and the fourth strain element 54 can sense the force in the first direction accurately. The first strain element 51 and the fourth strain element 54 are arranged flush on the first surface, and the second strain element 52 and the third strain element 53 are arranged flush on the second surface to facilitate the first strain element 51 and the fourth strain element. The strain element 54 as well as the second strain element 52 and the third strain element 53 can sense an accurate force in the second direction.

Further, in some embodiments of the present disclosure, a first gap 41 is provided on the first surface of the support sheet 40, a second gap 42 is provided on the second surface of the support sheet 40, and a set of first gaps 41 and second The gap 42 corresponds to a pressure sensing component, wherein the first strain element 51 and the fourth strain element 54 are arranged across the first gap 41, and the second strain element 52 and the third strain element 53 are arranged across the second gap 42. In this way, by providing the first gap 41 and the second gap 42 corresponding to the pressure sensing component on the support sheet 40, it is beneficial to amplify the force received by the pressure sensing component, so as to improve the pressure sensing of the pressure sensing component. Accuracy. Optionally, the first slit 41 and the second slit 42 are arranged correspondingly, and the first slit 41 and the second slit 42 are connected.

In the embodiment of the present disclosure, the support sheet 40 is insulated from the pressure sensing component, that is, the first strain element 51 and the fourth strain element 54 are insulated from the first surface, and the second strain element 52 is insulated from the first surface. The third strain element 53 is respectively arranged absolutely with the second surface. Optionally, an insulating layer is provided between the support sheet 40 and the pressure sensing component, that is, a first insulating layer is provided between the first strain element 51 and the fourth strain element 54 and the first surface, the second strain element 52 and A second insulating layer is provided between the third strain element 53 and the second surface.

In some optional embodiments of the present disclosure, the at least two pressure sensing components include a first pressure sensing component and a second pressure sensing component, and of the at least two pressure sensing components, the first pressure sensing component The first power terminal of the first pressure sensing component is grounded, the second power terminal of the first pressure sensing component is input with the power supply voltage VS, the second power terminal of the second pressure sensing component is grounded, and the first power supply of the second pressure sensing component Input the power supply voltage at the end. Optionally, the pressure sensing component can be powered by the pressure detection chip 30, the second power terminal of the first pressure sensing component is connected to the pressure detection chip 30, and the pressure detection chip 30 outputs the power supply voltage VS to the first pressure sensing component The first power terminal of the second pressure sensing component is connected to the pressure detection chip 30, and the pressure detection chip 30 outputs the power supply voltage VS to the first power terminal of the second pressure sensing component.

For example, as shown in FIG. 5, in the embodiment of the present disclosure, two pressure sensing components are taken as an example. The first pressure sensing component may include strain elements R1, R2, R3, and R4, and the second pressure sensing The assembly may include strain elements R5, R6, R7, and R8, where R1 and R5 are respectively the first strain element 51 in the respective pressure sensing assembly, and R2 and R6 are respectively the second strain element 52 in the respective pressure sensing assembly , R3 and R7 are respectively the third strain element 53 in the respective pressure sensing assembly, and R4 and R8 are respectively the fourth strain element 54 in the respective pressure sensing assembly. As shown in Figure 6, the first end of R1 is connected to the first end of R2 and is connected to the first power source; the second end of R2 is connected to the first end of R4 and is connected to the first detection end; The second end is connected to the second end of R3 and is connected to the second power source; the first end of R3 is connected to the second end of R1 and is connected to the second detection end; the first detection of the first pressure sensing component The first terminal and the second detection terminal are respectively connected to the pressure detection chip 30, the first power terminal is grounded, and the second power terminal inputs the power supply voltage VS; the first terminal of R5 is connected to the first terminal of R6, and is connected to the first power terminal; The second end of R6 is connected to the first end of R8 and connected to the first detection end; the second end of R8 is connected to the second end of R7 and is connected to the second power supply end; the first end of R7 is connected to the first end of R5 The second end is connected and connected to the second detection end; the first detection end and the second detection end of the second pressure sensing component are respectively connected to the pressure detection chip 30, the second power end is grounded, and the first power end inputs the power supply voltage VS.

In this example, R1, R2, R3 and R4 can form a first detection unit 10, R5, R6, R7 and R8 can form a first detection unit 10, and R2, R4, R5 and R7 can form a second detection unit 20; R1, R3, R6, and R8 can constitute a second detection unit 20; wherein, the first sensing parameter of the first detection end in the first pressure sensing assembly is recorded as Vp1, and the second sensing parameter of the second detection end is recorded As Vn1; the first sensing parameter of the first detecting end in the second pressure sensing component is recorded as Vp2, and the second sensing parameter of the second detecting end is recorded as Vn2. In the case of receiving a force in a first direction (such as a pressing force or a torsion force), it is assumed that the first direction is the direction from the first surface to the second surface. As shown in FIG. 7, the first surface of the supporting sheet 40 The strain elements R1, R4, R5, and R8 will decrease in resistance due to compression. The strain elements R2, R3, R6, and R7 placed on the second surface of the support plate 40 will increase in resistance due to tension. Then the values of Vp1 and Vn2 acquired by the pressure detection chip 30 increase, and the values of Vn1 and Vp2 decrease. That is, the pressure detection chip can determine the first pressure parameter in the first direction according to Vp1 and Vn1, which is denoted as S1, S1=Vp1-Vn1; Alternatively, the first pressure parameter in the first direction is determined according to Vp2 and Vn2, denoted as S2, S2=Vn2-Vp2; here, the numerical change of Vp1 and Vn2 can be regarded as the same, and the numerical change of Vn1 and Vp2 can be regarded as the same. In the case of receiving a force in a second direction (such as a pressing force or a torsion force), it is assumed that the second direction is the direction from the fourth strain element to the first strain element. As shown in Figure 8, R3 and R4 on the same side , R7 and R8 will decrease in resistance due to compression, R1, R2, R5, and R6 on the same side will increase in resistance due to being stretched, so the value of Vp1 and Vn1 obtained by the pressure detection chip 30 will increase. Larger, the value of Vp2 and Vn2 decreases, that is, the pressure detection chip can determine the second pressure parameter based on Vp1 and Vn2, denoted as S3, S3=Vp1-Vn2, as shown in Figure 6, Vp1 can be denoted as Vp3, Vn2 Vn3, then S3=Vp3-Vn3; or, the second pressure parameter can be determined based on Vn1 and Vp2, denoted as S4, S4=Vn1-Vp2; here, the value change of Vp1 and Vn1 can be regarded as the same, and the value of Vp2 and Vn2 The amount of change can be considered the same.

Referring to FIG. 4, the pressure sensing component further includes a switch K, which is connected between the second end of the second strain element 52 and the second end of the first strain element 51. When the switch K is open, the pressure detection chip 30 determines the first pressure parameter according to the first sensing parameter Vpx of the first detection terminal and the second sensing parameter Vnx of the second detection terminal in the pressure sensing assembly; when the switch K is closed In this case, the first strain element 51 and the second strain element 52 are connected in parallel, the third strain element 53 and the fourth strain element 54 are connected in parallel, and the pressure detection chip is based on the first pressure sensing component of one of the two pressure sensing components. A first sensing parameter of a detecting end, and a second sensing parameter of the second detecting end of the other of the two pressure sensing components.

Optionally, the switch K is connected to the pressure detection chip 30, and the pressure detection chip 30 outputs a control signal Sel to control the switch K to close or open.

For example, as shown in FIG. 5, in the embodiment of the present disclosure, two pressure sensing components are taken as an example. The first pressure sensing component may include strain elements R1, R2, R3, and R4, and the second pressure sensing The assembly may include strain elements R5, R6, R7, and R8, where R1 and R5 are respectively the first strain element 51 in the respective pressure sensing assembly, and R2 and R6 are respectively the second strain element 52 in the respective pressure sensing assembly , R3 and R7 are respectively the third strain element 53 in the respective pressure sensing assembly, and R4 and R8 are respectively the fourth strain element 54 in the respective pressure sensing assembly. As shown in Figure 9, the first end of R1 is connected to the first end of R2 and is connected to the first power source; the second end of R2 is connected to the first end of R4 and is connected to the first detection end; The second terminal is connected to the second terminal of R3 and connected to the second power terminal; the first terminal of R3 is connected to the second terminal of R1 and is connected to the second detection terminal; the switch K1 is connected to the second terminal of R2 and Between the second end of R1; the first detection end and the second detection end of the first pressure sensing component are respectively connected to the pressure detection chip 30, the first power supply terminal is grounded, and the second power supply terminal is input with the power supply voltage VS; R5 One end is connected to the first end of R6 and connected to the first power terminal; the second end of R6 is connected to the first end of R8 and connected to the first detection end; the second end of R8 is connected to the second end of R7 Connected to the second power terminal; the first terminal of R7 is connected to the second terminal of R5, and is connected to the second detection terminal; the switch K2 is connected between the second terminal of R6 and the second terminal of R5; The first detection terminal and the second detection terminal of the two pressure sensing components are respectively connected to the pressure detection chip 30, the second power terminal is grounded, and the first power terminal is input with a power supply voltage VS.

In this example, R1, R2, R3, and R4 can form a first detection unit 10, R5, R6, R7, and R8 can form a first detection unit 10, R1, R2, R3, R4, R5, R6, R7 and R8 can constitute a second detection unit 20; wherein, the first sensing parameter of the first detection end in the first pressure sensing component is recorded as Vp1, and the second sensing parameter of the second detection end is recorded as Vn1; the second pressure sensing The first sensing parameter of the first detection terminal in the assembly is denoted as Vp2, and the second sensing parameter of the second detection terminal is denoted as Vn2. In the case of receiving a force in a first direction (such as a pressing force or a torsion force), assuming that the first direction is the direction from the first surface to the second surface, the strain elements R1, R4, and R4 are arranged on the first surface of the support sheet 40. R5 and R8 will decrease in resistance due to compression. The strain elements R2, R3, R6 and R7 arranged on the second surface of the support plate 40 will increase in resistance due to tension, as shown in Figure 10. When the switches K1 and K2 are disconnected, the values of Vp1 and Vn2 acquired by the pressure detection chip 30 increase, and the values of Vn1 and Vp2 decrease, that is, the pressure detection chip 30 can determine the first pressure in the first direction according to Vp1 and Vn1 The parameter is denoted as S1, S1=Vp1-Vn1; or, the first pressure parameter in the first direction is determined according to Vp2 and Vn2, denoted as S2, S2=Vn2-Vp2; here, the value change of Vp1 and Vn2 can be regarded as the same , Vn1 and Vp2 can be regarded as the same; as shown in Figure 11, when switches K1 and K2 are closed, R1 and R2 are in parallel (denoted as R1//R2), and R3 and R4 are in parallel (denoted as R3/ /R4), R7 and R8 are in parallel (denoted as R7//R8), R5 and R6 are in parallel (denoted as R5//R6), here, Vp1 and Vn1 in the first pressure sensing component are the same (denoted as Vp3), Two pressure sensing components Vp2 and Vn2 are the same (denoted as Vn3), at this time the amount of change of R1//R2, the amount of change of R3//R4, the amount of change of R5//R6, and the amount of change of R7//R8 Basically the same, and the amount of change in Vp3 and Vn3 values is basically the same. In the case of receiving a force in the second direction (such as pressing force or torsion), it is assumed that the second direction is the direction from the fourth strain element to the first strain element. R3, R4, R7 and R8 on the same side are Compression will cause its resistance to decrease. R1, R2, R5, and R6 on the same side will increase their resistance due to being stretched. As shown in Figure 12, when switches K1 and K2 are off, then The values of Vp1 and Vn1 obtained by the pressure detection chip 30 increase, the values of Vp2 and Vn2 decrease, the changes of Vp1 and Vn1 are basically the same, and the changes of Vp2 and Vn2 are basically the same; as shown in Figure 13, when the switches K1 and K2 are closed Next, R1 and R2 are in parallel (denoted as R1//R2), R3 and R4 are in parallel (denoted as R3//R4), R7 and R8 are in parallel (denoted as R7//R8), and R5 and R6 are in parallel (denoted as R5/ /R6), here, Vp1 and Vn1 in the first pressure sensing component are the same (denoted as Vp3), and Vp2 and Vn2 in the second pressure sensing component are the same (denoted as Vn3). At this time, R1//R2 and R5// The resistance of R6 increases, and the resistances of R3//R4 and R7//R8 decrease, the value of Vp3 acquired by the pressure detection chip 30 increases, and the value of Vn3 decreases, that is, the pressure detection chip 30 can be determined according to Vp3 and Vn3 The second pressure parameter is denoted as S3, S3=Vp3-Vn3.

In the embodiments of the present disclosure, the switch may be an analog switch. It can be understood that the switch diagrams shown in FIGS. 4 and 9 to 13 are only an exemplary illustration, and do not represent a limitation on the actual switch style. .

Illustratively, in some embodiments of the present disclosure, the first direction is perpendicular to the first surface of the support sheet 40, and the second direction is perpendicular to the first direction.

For example, in some embodiments of the present disclosure, the supporting sheet 40 may be a steel sheet.

Optionally, in some embodiments of the present disclosure, as shown in FIG. 14, the pressure detection chip 30 may include: a data selector (MUX) 31, an analog-to-digital converter (ADC) 32, and a controller 33; and a data selector 31 The input end of each pressure sensing component is connected to the first detection end and the second detection end, the output end of the data selector 31 is connected to the input end of the analog-to-digital converter 32, and the output end of the analog-to-digital converter 32 is connected to the The controller 33 is connected. The data selector 31 is used to switch and connect the first detection end and the second detection end of each pressure sensing component, so as to obtain the first sensing parameter Vpx of the first detection end and the second sensing parameter Vnx of the second detection end. Here, the analog-to-digital converter 32 performs analog-to-digital conversion on analog signals such as the first sensing parameter Vpx and the second sensing parameter Vnx obtained by the data selector 31, and outputs the digital signal to the controller 33, which performs arithmetic processing and threshold Compare and judge, and finally output interrupt instruction or trigger instruction.

Optionally, the pressure detection chip 30 may further include: at least one operational amplifier 34 and at least one compensation module 35; at least one operational amplifier 34 is connected between the output terminal of the data selector 31 and the input terminal of the analog-to-digital converter 32, At least one compensation module 35 is connected to at least one operational amplifier 34 in a one-to-one correspondence. Here, the operational amplifier 34 is used to amplify the signal output from the output terminal of the data selector 31, and the compensation module 35 is used to compensate the offset voltage. For example, the controller may be a Microcontroller Unit (MCU), and the operational amplifier may be a programmable gain amplifier (PGA).

Optionally, the pressure sensing component may be powered by the pressure detection chip 30. At this time, in order to achieve stable power supply, the pressure detection chip 30 may further include: a voltage stabilizer 36, which is connected to a power supply module (not shown). OUT) is connected to the power terminal of the pressure sensing component to adjust the power supply voltage VCC output by the power module and output the adjusted power voltage VS to the power terminal. Preferably, the voltage regulator 36 may be a low dropout linear regulator (LDO). Illustratively, the number of at least two pressure sensing components is two, including a first pressure sensing component and a second pressure sensing component, and the voltage stabilizer 36 is connected to the first power terminal of the first pressure sensing component, The second power terminal of the first pressure sensing component is grounded, the voltage stabilizer 36 is connected to the second power terminal of the second pressure sensing component, and the first power terminal of the second pressure sensing component is grounded.

In the pressure detection circuit provided by the embodiments of the present disclosure, at least one first detection unit senses a force in a first direction, at least one second detection unit senses a force in a second direction, and the pressure detection chip The sensing parameters and the sensing parameters of the second detection unit determine the first pressure parameter in the first direction and the second pressure parameter in the second direction, and determine whether to output the trigger command according to the first pressure parameter and the second pressure parameter, which can realize the matching Pressure detection in two directions to determine whether to output a trigger command can avoid false triggers and improve user experience.

An embodiment of the present disclosure also provides an electronic device, which may include: a housing 90, a processor 60, and the aforementioned pressure detection circuit; as shown in FIGS. 15 and 16, the pressure detection circuit and the processor 60 are disposed inside the housing 90 , The pressure detection chip 30 of the pressure detection circuit is connected to the processor 60. In the embodiment of the present disclosure, after the pressure detection chip 30 determines to output the trigger instruction, the trigger instruction is output to the processor 60, and the processor 60 executes a preset operation corresponding to the trigger instruction based on the trigger instruction.

Optionally, in some optional embodiments of the present disclosure, as shown in FIGS. 15 and 16, the electronic device may further include a battery 70 and a power management chip 80. The power management chip 80 is connected to the battery 70, the processor 60 and the pressure The detection chip 30 is connected, and the battery 70 implements power supply for the processor 60 and the pressure detection chip 30 through the power management chip 80.

Optionally, in some embodiments of the present disclosure, as shown in FIGS. 17 and 18, the pressure sensing component of the pressure detection circuit is disposed at a position adjacent to the side wall of the housing 90, that is, the position of the dashed frame shown in FIG. 18. Optionally, the pressure sensing component can be attached to the inner wall of the housing 90. As shown in FIG. 17, the pressure sensing component is attached to the inner wall of the housing 90 through a double-sided tape 91.

Optionally, in some embodiments of the present disclosure, the first surface of the supporting sheet 40 is disposed opposite to the inner wall of the housing 90.

Here are some specific usage scenarios as examples.

In FIGS. 19A to 19D, the pressure sensing component can be attached to the inner wall of the housing 90. The pressure sensing component is equivalent to a button. The position of the dashed frame in the figure is the position of the pressure sensing component, which is the button area; The first surface of the sheet 40 is opposite to the inner wall of the housing 90, the first direction is perpendicular to the first surface of the supporting sheet 40, and the second direction is perpendicular to the first direction. The arrow in the figure indicates the direction of user operation. Here, in the pressure detection circuit, the force in the first direction is sensed by two first detection units 10, and the force in the second direction is sensed by one second detection unit 20, and the pressure detection chip 30 obtains two first directions. The first pressure parameters of are denoted as S1 and S2, respectively, and the pressure detection chip 30 obtains a second pressure parameter in the second direction, denoted as S3. In this example, the first preset value M is equal to the second preset value N, and the value is 400; the target preset value X is the third preset value X1, and the value is 2.

Figures 20A to 20E show the linearity between each position point in the button area and the parameter values of the first pressure parameter (i.e. S1 and S2) and the second pressure parameter (i.e. S3) in each exemplary operation scenario of this example. Schematic.

In an example scenario, as shown in Figure 19A, the user presses the key area vertically. In this operation, the values of S1, S2, and S3 are shown in Figure 20A. At this time, S1 is greater than M, S2 is greater than M, |S3| If it is less than N, and |S1|/|S3| is greater than X, and |S2|/|S3| is greater than X, the pressure detection chip will output a trigger instruction, and the processor will execute the corresponding preset operation according to the trigger instruction. It is understandable that in each scenario example, the pressure detection chip 30 obtains two first pressure parameters S1 and S2 in the first direction. As long as one of the parameters meets the first preset value M, the first pressure parameter in the first direction can be determined. A pressure parameter satisfies the condition.

In an example scenario, as shown in FIG. 19B, the user vertically presses the screen or vertically presses the back of the housing. In this operation, the values of S1, S2, and S3 are shown in FIG. 20B or FIG. 20C. At this time, S1>M , But |S3|>N, and |S1|/|S3|<X, the pressure detection chip will not output the trigger command.

In an example scenario, as shown in FIG. 19C, the user twists the housing of the electronic device. In this operation, the values of S1, S2, and S3 are as shown in FIG. 20D. At this time, S1>M, but S3>N, And |S1|/|S3|<X, the pressure detection chip will not output a trigger command.

In an example scenario, as shown in FIG. 19D, the user bends the housing of the electronic device. In this operation, the values of S1, S2, and S3 are as shown in FIG. 20E. At this time, S1>M, but S3>N, And |S1|/|S3|<X, the pressure detection chip will not output a trigger command.

In addition, in the embodiments of the present disclosure, the electronic device may be a mobile phone or a tablet computer. It is understandable that the electronic device is not limited to mobile phones and tablet computers, and may also be a laptop (Laptop Computer) or a personal digital assistant (Personal Digital Assistant, PDA), etc.

The electronic device with the above-mentioned pressure detection circuit provided by the embodiment of the present disclosure can realize pressure detection in two directions, and then determine whether to output a trigger instruction, which can improve the accuracy of the operation of the electronic device, avoid false triggering, and improve User experience.

Please refer to FIG. 21, which shows a schematic flow chart of the control method of the pressure detection circuit provided by the embodiment of the present disclosure. The embodiment of the present disclosure provides a control method of the pressure detection circuit, which is applied to the above pressure detection circuit and may include the following steps :

Step 2101: Acquire the sensing parameters of the first detection unit and the sensing parameters of the second detection unit;

Step 2102: Determine a first pressure parameter in the first direction and a second pressure parameter in the second direction according to the sensing parameter of the first detection unit and the sensing parameter of the second detection unit;

Step 2103: When the first pressure parameter and the second pressure parameter meet the preset conditions, output a trigger instruction.

In the embodiment of the present disclosure, when at least one first detection unit and at least one second detection unit in the pressure detection circuit sense an external force (for example, pressing force or torque), the information of the first detection unit can be obtained separately The sensing parameters and the sensing parameters of the second detection unit can then be preset arithmetic processing according to the sensing parameters of the first sensing unit and the sensing parameters of the second sensing unit to determine the first pressure parameter in the first direction and the second pressure parameter in the second direction The second pressure parameter is to compare the first pressure parameter and the second pressure parameter with the preset threshold to determine whether to output the trigger instruction.

In the embodiments of the present disclosure, the sensing parameters corresponding to the forces in the first direction and the second direction are used to determine the first pressure parameter in the first direction and the second pressure parameter in the second direction, and according to the first pressure The parameter and the second pressure parameter determine whether to output a trigger command, which can realize pressure detection in two directions, and then determine whether to output a trigger command, which can avoid false triggering and improve user experience.

Optionally, in some embodiments of the present disclosure, in step 2102, the first pressure parameter in the first direction and the second pressure parameter in the second direction are determined according to the sensing parameter of the first detection unit and the sensing parameter of the second detection unit, It may include: determining the first pressure parameter in the first direction and the second pressure parameter in the second direction according to the first sensing parameter of the first detection end and the second sensing parameter of the second detection end in the at least two pressure sensing components. Here, specifically, the first pressure parameter in the first direction can be determined according to the first sensing parameter of the first detection end and the second sensing parameter of the second detection end in the pressure sensing component; and, according to different detections in the two pressure sensing components The second pressure parameter is determined by the sensing parameter of the terminal. For example, the pressure detection chip can be based on the first sensing parameter of the first detection terminal in one of the two pressure sensing components and the two pressure sensing components The second sensing parameter of the second detection end of the other pressure sensing component in determines the second pressure parameter.

Optionally, in some embodiments of the present disclosure, in step 2103, when the first pressure parameter value and the second pressure parameter meet a preset condition, outputting a trigger instruction may include: when the first pressure parameter is greater than the first preset condition, If the value is set and the absolute value of the second pressure parameter is smaller than the second preset value, if the calculated value of the first pressure parameter and the second pressure parameter according to the preset algorithm is greater than the target preset value, a trigger instruction is output. In the embodiment of the present disclosure, the first pressure parameter is compared with the first preset value, the second pressure parameter is compared with the second preset value, and the first pressure parameter is greater than the first preset value and the second When the absolute value of the pressure parameter is less than the second preset value, the calculated value calculated by the first pressure parameter and the second pressure parameter according to the preset algorithm is compared with the target preset value, and if the calculated value is greater than the target preset value, Output the trigger command, otherwise it is judged to be a false touch and interrupt the command. Here, the first preset value and the second preset value are both positive values. Understandably, the settings of the first preset value, the second preset value, and the target preset value can be specifically set according to actual design requirements, historical experience, or through multiple experiments.

In an example, the first pressure parameter may be compared with the first preset value first, and if the first pressure parameter is greater than the first preset value, then the second pressure parameter may be compared with the second preset value, otherwise It is determined not to output the trigger command; if the absolute value of the second pressure parameter is less than the second preset value, the calculated value calculated by the first pressure parameter and the second pressure parameter according to the preset algorithm is further compared with the target preset value, otherwise The pressure detection chip determines that it is a false touch and interrupts the instruction, that is, it is determined not to output the trigger instruction. In this way, the amount of logic operations of the pressure detection chip can be reduced, and the efficiency of logic judgment can be improved. Of course, in another example, the pressure detection chip may also perform processing at the same time for comparing the first pressure parameter with the first preset value and the second pressure parameter with the second preset value.

Preferably, in some optional embodiments of the present disclosure, if the calculated value of the first pressure parameter and the second pressure parameter according to the preset algorithm is greater than the target preset value, the output trigger command may include at least one of the following : If the ratio of the absolute value of the first pressure parameter to the absolute value of the second pressure parameter is greater than the third preset value, the trigger command is output; if the difference between the absolute value of the first pressure parameter and the absolute value of the second pressure parameter If it is greater than the fourth preset value, a trigger instruction is output.

The control method of the pressure detection circuit provided by the embodiment of the present disclosure determines the first pressure parameter in the first direction and the second pressure parameter in the second direction by using the sensing parameters corresponding to the forces in the first direction and the second direction. Pressure parameters, and determine whether to output a trigger command according to the first pressure parameter and the second pressure parameter, which can detect pressure in two directions, and then determine whether to output the trigger command, which can avoid false triggers and improve user experience.

It should be understood that in the description of the specification, the reference term "one embodiment", "one embodiment" or "some embodiments" mentioned means that a particular feature, structure or characteristic related to the embodiment is included in at least one of the present disclosure. In an embodiment or example. Therefore, appearances of "in one embodiment", "in one embodiment" or "in some embodiments" in various places throughout the specification do not necessarily refer to the same embodiment. In addition, the elements, structures, or features described in one drawing or an embodiment of the present disclosure can be combined with elements, structures, or features shown in one or more other drawings or embodiments in any suitable manner. .

It should be noted that in one or more embodiments herein, the terms "including", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, The article or device includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article or device that includes the element.

In the present disclosure, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed", "set" and other terms should be understood in a broad sense. For example, it may be a fixed connection or It can be detachably connected or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present disclosure can be understood according to specific circumstances.

In addition, the present disclosure may repeat reference numerals and/or letters in different embodiments or examples. This repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and/or settings discussed.

In addition, in the embodiments of the invention, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the relationship between these entities or operations. There is any such actual relationship or sequence.

The embodiments of the present disclosure have been described above with reference to the accompanying drawings, but the present disclosure is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of the present disclosure, many forms can be made without departing from the purpose of the present disclosure and the scope of protection of the claims, all of which fall within the protection of the present disclosure.

Claims

A pressure detection circuit includes:

At least one first detection unit, the first detection unit is used to sense a force in a first direction;

At least one second detection unit, the second detection unit is used to sense a force in a second direction; the first detection unit and the second detection unit have different sensing parameters corresponding to different forces; so The first direction and the second direction are at a predetermined angle;

The pressure detection chip is connected to the first detection unit and the second detection unit respectively, and the pressure detection chip is based on the sensing parameters of the first detection unit and the sensing of the second detection unit Parameters, determine the first pressure parameter in the first direction and the second pressure parameter in the second direction, and determine whether to output a trigger command according to the first pressure parameter and the second pressure parameter.
The pressure detection circuit according to claim 1, wherein the pressure detection circuit comprises: at least two pressure sensing components arranged on a supporting sheet, the pressure sensing component having a first power terminal and a second power terminal , A first detection end and a second detection end, the first detection end and the second detection end are respectively connected to the pressure detection chip; wherein, each of the pressure sensing components constitutes one of the first detection Unit, the at least two pressure sensing components cooperate to form at least one second detection unit;

The pressure detection chip determines the first pressure parameter in the first direction and the second sensing parameter in the second direction according to the first sensing parameter of the first sensing end and the second sensing parameter of the second sensing end in the at least two pressure sensing components. A second pressure parameter, and determining whether to output a trigger command according to the first pressure parameter and the second pressure parameter.
The pressure detection circuit according to claim 2, wherein:

The supporting sheet includes a first surface and a second surface opposite to each other;

The pressure sensing component includes a first strain element, a second strain element, a third strain element, and a fourth strain element. The first strain element and the fourth strain element are arranged on the first surface, and the The second strain element and the third strain element are arranged on the second surface;

The first end of the first strain element is connected to the first end of the second strain element and is connected to the first power source; the second end of the second strain element is connected to the first end of the fourth strain element One end is connected and connected to the first detection end; the second end of the fourth strain element is connected to the second end of the third strain element and is connected to the second power supply end; The first end is connected with the second end of the first strain element, and is connected with the second detection end.
The pressure detection circuit according to claim 3, wherein the pressure sensing component further comprises a switch connected between the second end of the second strain element and the second end of the first strain element between;

When the switch is off, the pressure detection chip determines the first pressure parameter according to the first sensing parameter of the first detection terminal and the second sensing parameter of the second detection terminal in the pressure sensing component;

When the switch is closed, the pressure detection chip is based on the first sensing parameter of the first detection end of one of the two pressure sensing components, and the first sensing parameter of the two pressure sensing components The second sensing parameter of the second detection end of another pressure sensing component determines the second pressure parameter.
The pressure detection circuit according to claim 1, wherein the pressure detection chip comprises: a data selector, an analog-to-digital converter, and a controller;

The input end of the data selector is respectively connected to the first detection end and the second detection end of each of the pressure sensing components, and the output end of the data selector is connected to the analog-to-digital converter The input terminal is connected, and the output terminal of the analog-to-digital converter is connected to the controller.
The pressure detection circuit according to claim 3 or 4, wherein the first strain element and the second strain element are arranged opposite to each other, and the third strain element is arranged opposite to the fourth strain element.
The pressure detection circuit according to claim 3 or 4, wherein the first strain element and the fourth strain element are arranged flush on the first surface, and the second strain element and the third strain element The strain element is arranged flush on the second surface.
The pressure detection circuit according to claim 6 or 7, wherein a first gap is provided on the first surface of the support sheet, and a second gap is provided on the second surface of the support sheet, and A set of the first gap and the second gap corresponds to one of the pressure sensing components, wherein the first strain element and the fourth strain element are arranged across the first gap, and the second The strain element and the third strain element are arranged across the second gap.
8. The pressure detection circuit according to claim 8, wherein the first gap and the second gap are arranged correspondingly, and the first gap and the second gap are connected.
The pressure detection circuit according to claim 2, wherein, among the at least two pressure sensing components, the first power supply terminal of the first pressure sensing component is grounded, and the second pressure sensing component of the first pressure sensing component is grounded. The power supply terminal is input with a power supply voltage, the second power supply terminal of the second pressure sensing component is grounded, and the first power supply terminal of the second pressure sensing component is input with a power supply voltage.
An electronic device, comprising: a housing, a processor, and the pressure detection circuit according to any one of claims 1 to 10;

The pressure detection circuit and the processor are arranged inside the housing, and the pressure detection chip of the pressure detection circuit is connected to the processor.
11. The electronic device according to claim 11, wherein the pressure sensing component of the pressure detection circuit is disposed at a position adjacent to the side wall of the housing.
A control method of a pressure detection circuit, applied to the pressure detection circuit according to any one of claims 1 to 10, comprising:

Acquiring the sensing parameters of the first detection unit and the sensing parameters of the second detection unit;

Determine the first pressure parameter in the first direction and the second pressure parameter in the second direction according to the sensing parameter of the first detection unit and the sensing parameter of the second detection unit;

When the first pressure parameter and the second pressure parameter meet a preset condition, output a trigger instruction.
The control method according to claim 13, wherein the first pressure parameter in the first direction and the second pressure parameter in the second direction are determined according to the sensing parameter of the first detection unit and the sensing parameter of the second detection unit. Two pressure parameters, including:

The first pressure parameter in the first direction and the second pressure parameter in the second direction are determined according to the first sensing parameter of the first detection end and the second sensing parameter of the second detection end in the at least two pressure sensing components.
The control method according to claim 13, wherein said outputting a trigger instruction when said first pressure parameter value and said second pressure parameter meet a preset condition comprises:

When the first pressure parameter is greater than the first preset value, and the absolute value of the second pressure parameter is less than the second preset value, if the first pressure parameter and the second pressure parameter are Assuming that the calculated value of the algorithm is greater than the target preset value, a trigger instruction is output.
The control method according to claim 15, wherein if the calculated value of the first pressure parameter and the second pressure parameter according to a preset algorithm is greater than a target preset value, outputting a trigger instruction, including at least the following One:

If the ratio of the absolute value of the first pressure parameter to the absolute value of the second pressure parameter is greater than the third preset value, output a trigger instruction;

If the difference between the absolute value of the first pressure parameter and the absolute value of the second pressure parameter is greater than the fourth preset value, output a trigger instruction.