Submersible shell of magnetic suspension underwater touch button device

Abstract

The invention relates to the technical field of mistaken touch prevention of touch screens, and provides a magnetic suspension underwater touch button device diving shell which comprises the steps that in the underwater operation process of a mobile phone provided with the magnetic suspension underwater touch button device diving shell, the contact area, the contact pressure, the non-contact area, the non-contact pressure, the contact induction current and the non-contact induction current are collected; obtaining a false touch possibility at a collection moment, establishing a cost function and taking an optimal value, and obtaining an optimal value of an induced current threshold value at the collection moment; when the magnetic suspension underwater touch button is static on the surface of a mobile phone screen, a real touch signal is determined according to the optimal value of the induced current threshold value, and mobile phone touch operation is completed; and when the magnetic suspension underwater touch button moves on the surface of the mobile phone screen, determining an adjustment optimal threshold value at the acquisition time, determining a real touch signal according to the adjustment optimal threshold value, and completing the touch operation of the mobile phone. The invention aims to avoid the problem that the mobile phone is mistakenly touched during underwater operation due to the influence of water pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of touch screen accidental touch prevention, and in particular to a diving shell for a magnetically suspended underwater touch button device. Background Art

[0002] Most mobile phones use capacitive touchscreens. Due to limitations such as the conductive principle of capacitive screens, the physical properties of water, and light refraction, mobile phones cannot be touched underwater. To achieve underwater filming and photography, a submersible housing is required to waterproof the phone. Once the phone is in the submersible housing, pressure is focused on the magnetically suspended underwater touch button on the housing to enable touch control of the phone screen.

[0003] However, during the movement of the magnetic levitation underwater touch button on the surface of the mobile phone screen, the magnetic levitation underwater touch button is also affected by water pressure. The pressure of the water pressure can easily cause the conductive soft glue of the magnetic levitation underwater touch button to contact the transparent conductive protective film during movement, causing the touch signal to be transmitted incorrectly, resulting in accidental touch problems on the mobile phone screen. Summary of the Invention

[0004] The present invention provides a submersible housing for a magnetically suspended underwater touch button device to solve the problem of accidental touches on mobile phone screens caused by water pressure when the mobile phone is operated underwater. The technical solutions adopted are as follows:

[0005] One embodiment of the present invention provides a submersible housing for a magnetically suspended underwater touch button device, comprising the following steps:

[0006] During underwater operation of a mobile phone equipped with a diving case for a magnetically suspended underwater touch button device, the contact area, contact pressure, non-contact area, non-contact pressure, contact induced current, and non-contact induced current are collected at each collection moment when a touch signal appears;

[0007] Obtaining the possibility of a false touch at the same acquisition moment based on the contact area, contact pressure, non-contact area, and non-contact pressure at the same acquisition moment; establishing a cost function based on the contact induced current, non-contact induced current, and false touch possibility at the acquisition moment, and applying an optimization algorithm to the cost function to obtain an optimal value of the induced current threshold at each acquisition moment;

[0008] When the magnetically suspended underwater touch button is stationary on the surface of the mobile phone screen, the system distinguishes between real touch signals and false touch signals based on the numerical relationship between the contact induced current and the optimal value of the induced current threshold at the time of collection, and completes the mobile phone touch operation based on the real touch signal;

[0009] When the magnetic suspension underwater touch button moves on the surface of the mobile phone screen, the previous related collection moment is identified, and the adjustment optimal threshold value at the collection moment is determined based on the values ​​of the contact induced current and the non-contact induced current in the previous related collection moment. According to the numerical relationship between the contact induced current at the collection moment and the adjustment optimal threshold value, the real touch signal and the false touch signal are distinguished, and the mobile phone touch operation is completed for the real touch signal.

[0010] Furthermore, the contact induced current and the non-contact induced current are:

[0011] The maximum value of the induced current at all positions within the contact area at the time of collection is recorded as the contact induced current at the time of collection;

[0012] The maximum value of the induced current at all positions within the non-contact area at the time of collection is recorded as the non-contact induced current at the time of collection.

[0013] Furthermore, the method for obtaining the possibility of false touch at the acquisition moment is:

[0014] The product of the contact area and the contact pressure at the time of collection is recorded as the contact characteristic value at the time of collection; the product of the non-contact area and the non-contact pressure at the time of collection is recorded as the non-contact characteristic value at the time of collection;

[0015] The absolute value of the difference between the contact feature value and the non-contact feature value at the acquisition moment is recorded as the contact feature difference at the acquisition moment;

[0016] The normalized value of the ratio of the sum of the non-contact feature value and the preset first parameter at the acquisition moment to the contact feature difference is recorded as the false touch possibility at the acquisition moment.

[0017] Furthermore, the cost function is:

[0018] C(I,t,λ)=Q(t)+λ×(max(0,I1(t)-I)+max(0,I-I2(t)))

[0019] Where C(I, t, λ) represents the cost function at acquisition time t, with the penalty coefficient λ and the induced current threshold I; I represents the induced current threshold; t represents the acquisition time; λ represents the penalty coefficient; Q(t) represents the probability of false touch at acquisition time t; I1(t) represents the contact induced current at acquisition time t; I2(t) represents the non-contact induced current at acquisition time t; and max() represents the maximum value function.

[0020] Furthermore, when the magnetically suspended underwater touch button is stationary on the surface of the mobile phone screen, distinguishing between a true touch signal and a false touch signal based on a numerical relationship between the contact induced current at the time of collection and the optimal value of the induced current threshold comprises the following specific steps:

[0021] When the position corresponding to the contact area of ​​the mobile phone screen at two adjacent acquisition moments remains unchanged, it is determined that the magnetic suspension underwater touch button is stationary on the surface of the mobile phone screen;

[0022] When the touch induced current at the acquisition moment is greater than the optimal value of the induced current threshold at the acquisition moment, the touch induced current at the acquisition moment is marked as a real touch signal;

[0023] When the contact induced current at the acquisition moment is less than or equal to the optimal value of the induced current threshold at the acquisition moment, the contact induced current at the acquisition moment is marked as a false touch signal.

[0024] Furthermore, when the magnetic suspension underwater touch button moves on the surface of the mobile phone screen, identifying the previous related collection moment of the collection moment includes the following specific steps:

[0025] When the positions corresponding to the contact areas of the mobile phone screen at two adjacent acquisition moments change, it is determined that the magnetic suspension underwater touch button has moved on the surface of the mobile phone screen;

[0026] The collection moment and the collection moments before and after the collection moment when the magnetic suspension underwater touch button moves on the surface of the mobile phone screen are recorded as the previous relevant collection moments of the collection moment.

[0027] Furthermore, the method for determining the optimal threshold value for adjusting the acquisition time is as follows:

[0028] Recording the number of collection moments at which the contact induced current is not zero in the collection moments preceding the collection moment as a first number of collection moments, and recording the number of collection moments at which the non-contact induced current is zero in the collection moments preceding the collection moment as a second number of collection moments; using the difference between the number 1 and the first number of collection moments as the numerator, and the difference between the number 1 and the second number of collection moments as the denominator, to establish a fraction, and recording the difference between the value of the preset second parameter and the value of the fraction as an adjustment coefficient for the collection moment;

[0029] The standard deviation of the difference between the contact induced current and the non-contact induced current at all previous related collection moments of the collection moment is recorded as the induced current fluctuation range at the collection moment;

[0030] The sum of the product of the adjustment coefficient and the induced current fluctuation range at the acquisition time and the optimal value of the induced current threshold at the acquisition time is recorded as the adjustment optimal threshold at the acquisition time.

[0031] Furthermore, the method of distinguishing between a true touch signal and a false touch signal based on the numerical relationship between the touch induced current at the acquisition moment and the adjusted optimal threshold value includes the following specific methods:

[0032] When the touch induced current at the acquisition moment is greater than the adjusted optimal threshold at the acquisition moment, the touch induced current at the acquisition moment is marked as a real touch signal;

[0033] When the contact induced current at the acquisition moment is less than or equal to the adjusted optimal threshold at the acquisition moment, the contact induced current at the acquisition moment is marked as a false touch signal.

[0034] Furthermore, the watertight compartment of the diving shell of the magnetic suspension underwater touch button device includes:

[0035] Waterproof layer transparent contact piece, inner mobile phone screen touch screen film, lock buckle, fixed expansion handle thread, shutter key control PCB, shutter socket, connecting wire, diving shell lower cover, diving shell upper cover, magnetic suspension button embedded layer, waterproof compartment and magnetic suspension button leakage layer.

[0036] Furthermore, the lower cover of the diving case of the magnetic suspension underwater touch button device includes:

[0037] Charging hole, shutter button, phone fixing suction cup, side buttons, metal shrapnel and rear view window.

[0038] The beneficial effects of the present invention are:

[0039] The present application first evaluates the possibility that the touch signal appearing at the acquisition moment is a false touch based on the difference in the area and pressure values ​​of the contact position and the non-contact position of the mobile phone screen, obtains the false touch possibility at each acquisition moment respectively, establishes a cost function based on the contact induced current, non-contact induced current and false touch possibility at the acquisition moment, and uses an optimization algorithm to obtain the optimal value of the induced current threshold at each acquisition moment. The optimal value of the induced current threshold at each acquisition moment can realize the recognition of the real touch signal while minimizing the false touch possibility at the acquisition moment; further, when the magnetic suspension underwater touch button is stationary on the surface of the mobile phone screen, the optimal value of the induced current threshold at the acquisition moment is directly used as the threshold for judging whether the contact induced current at the acquisition moment is a real touch signal, determines the real touch signal and the false touch signal, and The real touch signal completes the touch operation; when the magnetic suspension underwater touch button moves on the surface of the mobile phone screen, the optimal value of the induced current threshold at the collection moment is further adjusted according to the values ​​of the contact induced current and the non-contact induced current in the previous related collection moment, and the adjusted optimal threshold at the collection moment is determined. The adjusted optimal threshold at the collection moment is used as the threshold for judging whether the contact induced current at the collection moment is a real touch signal, and the real touch signal and the false touch signal are determined, and the touch operation is completed on the real touch signal. The method for determining the real touch signal and the false touch signal of the present application can adaptively determine the induced current threshold, avoids the influence of the pressure applied by different users and the water pressure of different operating depths on the real touch operation, and solves the problem that the mobile phone is affected by water pressure during underwater operation and the mobile phone screen is prone to false touches. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 A schematic diagram of a diving shell process for a magnetic suspension underwater touch button device provided by one embodiment of the present invention;

[0042] Figure 2 Schematic diagram of the waterproof compartment structure of the diving case of a magnetic levitation underwater touch button device provided by one embodiment of the present invention, including a waterproof transparent contact sheet 1, an inner mobile phone screen touch screen film 2, a lock 3, a fixed expansion handle thread 4, a shutter key control PCB 5, a shutter socket 6, a connecting line 7, a diving case lower cover 8, a diving case upper cover 9, a magnetic levitation button embedded layer 10, a waterproof compartment 11, and a magnetic levitation button leakage layer 12;

[0043] Figure 3 A schematic diagram of the lower cover structure of a diving case for a magnetic suspension underwater touch button device provided by one embodiment of the present invention, including a charging opening 13, a shutter button 14, a mobile phone fixing suction cup 15, a side button 16, a metal dome 17, and a rear view window 18;

[0044] Figure 4 Three views of the diving shell of the magnetic suspension underwater touch button device provided by one embodiment of the present invention;

[0045] Figure 5 A flowchart of obtaining the possibility of an accidental touch provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0047] See also Figure 1 , which shows a flowchart of a diving shell of a magnetic suspension underwater touch button device provided by an embodiment of the present invention, the method includes the following steps:

[0048] Step S001: During underwater operation of a mobile phone equipped with a diving case for a magnetically suspended underwater touch button device, the contact area, contact pressure, non-contact area, non-contact pressure, contact induced current, and non-contact induced current are collected at each collection moment when a touch signal appears.

[0049] The magnetic suspension underwater touch button device on the diving case can make the underwater touch button move on the transparent protective film on the surface of the mobile phone screen, so that the underwater touch button can directly control the mobile phone screen with fingers through the contact between the underwater touch button and the transparent protective film.

[0050] The submersible's magnetic suspension underwater touch button consists of two components: an upper magnetic suspension button assembly and a lower magnetic suspension button assembly. The upper magnetic suspension button assembly is located outside the transparent protective film and can be directly touched by the user's hand. The lower magnetic suspension button assembly is located inside the transparent protective film and is an internal component that cannot be directly touched by the user's hand. Both the upper and lower magnetic suspension buttons are attached to both sides of the transparent protective film. Pushing the upper magnetic suspension button assembly moves the lower magnetic suspension button assembly.

[0051] When the user needs to operate the phone's touchscreen, they move the upper magnetic suspension button to the desired operating position and press it down. This causes the conductive soft rubber of the lower magnetic suspension button to contact the transparent conductive protective film and move it downward to the desired operating position, allowing the transparent conductive protective film to contact the phone screen and activate the touchscreen function. The lower magnetic suspension button is located within a sealed watertight cavity formed between the transparent protective film and the transparent conductive protective film of the diving housing. This sealed cavity blocks water and conductive liquids from contacting the phone screen surface.

[0052] When the user does not need to operate the phone's touch screen, the upper group of magnetic suspension buttons is not pressed, and the transparent conductive protective film cannot contact the phone screen, thus preventing the touch screen function from being realized. This can prevent the phone from being affected by water pressure when the user is not operating the phone's touch screen, causing the phone screen to be accidentally touched. However, during the process of the magnetic suspension underwater touch button moving on the surface of the phone screen, the magnetic suspension underwater touch button is also affected by water pressure. The pressure of the water can easily cause the conductive soft rubber of the magnetic suspension underwater touch button to contact the transparent conductive protective film during movement, causing the touch signal to be mistransmitted, resulting in the problem of accidental touch of the phone screen.

[0053] Therefore, during the underwater operation of a mobile phone equipped with a diving case for a magnetic levitation underwater touch button device, if the magnetic levitation underwater touch button moves on the surface of the mobile phone screen, it is necessary to further judge the touch signal to confirm whether the touch signal is an erroneously transmitted touch signal to avoid the influence of water pressure and the problem of accidental touch when the mobile phone is operated underwater.

[0054] The schematic diagram of the watertight compartment structure of the magnetic suspension underwater touch button device is as follows Figure 2 As shown. Figure 2 In the figure, 1 represents the transparent contact sheet of the waterproof layer, 2 represents the inner layer of the mobile phone screen touch screen film, 3 represents the lock buckle, 4 represents the fixed expansion handle thread, 5 represents the shutter button control PCB, 6 represents the shutter socket, 7 represents the connecting line, 8 represents the lower cover of the diving case, 9 represents the upper cover of the diving case, 10 represents the magnetic suspension button embedded layer, 11 represents the waterproof compartment, and 12 represents the magnetic suspension button leakage layer; wherein, the shutter socket is inserted into the mobile phone charging port, and the magnetic suspension button embedded layer is installed in the waterproof compartment. It can be understood that the sealed cavity of the diving case of the magnetic suspension underwater touch button device that accommodates the mobile phone is composed of the upper cover of the diving case and the lower cover of the diving case. The upper cover of the diving case is used to isolate water to prevent water from directly touching the surface of the mobile phone screen and causing accidental or random touches. The magnetic suspension button is provided in the waterproof compartment. The magnetic suspension button is divided into two layers, which are adsorbed on the surface of the watertight compartment on the upper cover of the diving case through the upper and lower magnets. When the finger touches the transparent film and moves the upper button, the upper button is equipped with a magnet, which can drive the lower button to move at the same time, allowing you to touch any point on the mobile phone screen underwater. The touch screen signal is transmitted to the mobile phone screen inside the diving case through the embedded magnet conductive silicone.

[0055] The schematic diagram of the lower cover structure of the magnetic suspension underwater touch button device is as follows Figure 3 As shown. Figure 3 In the figure, 13 indicates the charging port, 14 indicates the shutter button, 15 indicates the phone-securing suction cup, 16 indicates the side button, 17 indicates the metal spring, and 18 indicates the rearview window. The metal spring is used to secure the phone. It is understood that the lower cover of the diving case has a shutter button for shooting. This button houses a PCB circuit control and connects to the phone via a cable interface. Pressing the shutter button activates the PCB to transmit signals, which activates the phone's camera to shoot.

[0056] Three-view drawing of the diving shell of the magnetic suspension underwater touch button device Figure 4 shown.

[0057] During underwater operation of a mobile phone equipped with a diving case for a magnetically suspended underwater touch button device, a collection time is set every 0.01 seconds.

[0058] When a touch signal is received, the touch magnetic suspension button is pressed, and the corresponding depressed position on the transparent conductive protective film contacts the phone screen, forming a capacitor at the contact location. The area of ​​the phone screen surface where the capacitor is formed is recorded as the contact area of ​​the phone screen at the corresponding acquisition time. The area of ​​the phone screen surface where the capacitor is not formed is recorded as the non-contact area of ​​the phone screen at the corresponding acquisition time. Using the phone's built-in touch IC and the distributed pressure sensor array on the phone screen, the contact pressure of the contact area of ​​the phone screen at each acquisition time and the non-contact pressure of the non-contact area of ​​the phone screen at each acquisition time are obtained.

[0059] At the same time, the induced currents at all positions within the contact area and the non-contact area are collected, and the maximum value of the induced currents at all positions within the contact area at the collection moment is recorded as the contact induced current at the collection moment, and the maximum value of the induced currents at all positions within the non-contact area at the collection moment is recorded as the non-contact induced current at the collection moment.

[0060] It is understood that when no touch signal is present, the contact area, contact pressure, non-contact area, non-contact pressure, contact induced current, and non-contact induced current are all zero, and the phone does not perform touch operations. Therefore, this application only analyzes the acquisition moments when touch signals appear during the underwater operation of a mobile phone equipped with a magnetic levitation underwater touch button device. When the duration of a touch signal is less than 0.01 seconds, only one acquisition moment is set for the earliest moment within the duration of the touch signal.

[0061] At this point, the contact area, contact pressure, non-contact area, non-contact pressure, contact induced current and non-contact induced current at each collection moment when the touch signal appears during the manual operation of the mobile phone equipped with the magnetic suspension underwater touch button device are obtained.

[0062] Step S002: Obtain the possibility of false touch at the same acquisition moment according to the contact area, contact pressure, non-contact area, and non-contact pressure at the same acquisition moment.

[0063] The product of the contact area and the contact pressure at the acquisition moment is recorded as the contact characteristic value at the acquisition moment; the product of the non-contact area and the non-contact pressure at the acquisition moment is recorded as the non-contact characteristic value at the acquisition moment; the absolute value of the difference between the contact characteristic value and the non-contact characteristic value at the acquisition moment is recorded as the contact characteristic difference at the acquisition moment; and the normalized value of the ratio of the sum of the non-contact characteristic value and the first parameter at the acquisition moment to the contact characteristic difference is recorded as the false touch possibility at the acquisition moment.

[0064] It should be noted that this embodiment uses the Z-Score standard normalization method to calculate the normalized value. In actual application, the implementer can use other existing methods such as maximum and minimum value normalization method, sigmoid function, etc. to calculate the normalized value, which is not limited here.

[0065] During the ratio calculation process, to avoid the denominator being zero, a preset value is added to the denominator. In this embodiment, the preset value is 0.1. The first parameter is a preset parameter value. In this embodiment, the first parameter is set to 0.1. The purpose of the first parameter is to prevent the non-contact area or non-contact pressure from being zero, so that the contact feature difference at the time of collection does not affect the value of the false touch probability at the time of collection, which may lead to the problem of a low false touch probability value at the time of collection.

[0066] The greater the difference between the contact area and the non-contact area at the acquisition moment, the greater the difference between the contact pressure and the non-contact pressure, and the smaller the values ​​of the non-contact area and the non-contact pressure, the less likely the touch signal appearing at the acquisition moment is a false touch. At this time, the possibility of a false touch at the acquisition moment is smaller.

[0067] At this point, the false touch possibility of all acquisition moments is obtained. The false touch possibility acquisition flow chart is as follows: Figure 5 shown.

[0068] Step S003: Establish a cost function based on the contact induced current, non-contact induced current, and false touch possibility at the acquisition moment, and use an optimization algorithm on the cost function to obtain the optimal value of the induced current threshold at each acquisition moment. When the magnetic suspension underwater touch button is stationary on the surface of the mobile phone screen, distinguish between real touch signals and false touch signals based on the numerical relationship between the contact induced current at the acquisition moment and the optimal value of the induced current threshold, and complete the mobile phone touch operation on the real touch signal.

[0069] According to the contact induced current, non-contact induced current and false touch possibility at the acquisition time, the cost function C(I, t, λ) is established:

[0070] C(I,t,λ)=Q(t)+λ×(max(0,I1(t)-I)+max(0,I-I2(t)))

[0071] Where C(I, t, λ) represents the cost function at acquisition time t, with the penalty coefficient being λ and the induced current threshold being I; I represents the induced current threshold; t represents the acquisition time; λ represents the penalty coefficient, the value of which is obtained by cross-validation; Q(t) represents the probability of false touch at acquisition time t; I1(t) represents the contact induced current at acquisition time t; I2(t) represents the non-contact induced current at acquisition time t; and max() represents the maximum value function, which takes the maximum value of the values ​​separated by commas in the parentheses.

[0072] The cost function is used to evaluate the cost of identifying a real touch signal when the acquisition time t and the induced current threshold value are set to I.

[0073] The optimization algorithm is used to obtain the optimal value I(t) of the induced current threshold I at the acquisition time t according to the cost function.

[0074] This embodiment uses a particle swarm optimization algorithm to obtain the optimal value of the induced current threshold at each acquisition moment. This optimal value of the induced current threshold at each acquisition moment can achieve recognition of true touch signals while minimizing the possibility of false touches at that acquisition moment. In other implementations, while achieving the goal of obtaining the optimal value of the induced current threshold at each acquisition moment based on a cost function, implementers may use other existing methods, such as Lagrange multipliers, to obtain the optimal value of the induced current threshold. This application does not impose any specific restrictions.

[0075] When the positions corresponding to the contact areas of the mobile phone screen at two adjacent acquisition moments remain unchanged, it is determined that the magnetic suspension underwater touch button is stationary on the surface of the mobile phone screen.

[0076] When the magnetic levitation underwater touch button is stationary on the surface of the mobile phone screen, the real touch signal and the false touch signal are determined, and the touch operation is completed for the real touch signal. The specific steps are: when the contact induced current at the collection moment is greater than the optimal value of the induced current threshold at the collection moment, the contact induced current at the collection moment is marked as a real touch signal, and the mobile phone completes the touch operation according to the touch signal; when the contact induced current at the collection moment is less than or equal to the optimal value of the induced current threshold at the collection moment, the contact induced current at the collection moment is marked as a false touch signal, and the mobile phone does not complete the touch operation.

[0077] The method for determining real touch signals and false touch signals can adaptively determine the induced current threshold, thereby avoiding the influence of pressure applied by different users and water pressure at different operating depths on the real touch operation.

[0078] At this point, the real touch signal and the false touch signal are determined, and the touch operation is completed on the real touch signal.

[0079] Step S004: When the magnetically suspended underwater touch button moves on the surface of the mobile phone screen, identify the previous related collection moment, determine the optimal adjustment threshold at the collection moment based on the values ​​of the contact induced current and the non-contact induced current in the previous related collection moment, distinguish between the real touch signal and the false touch signal based on the numerical relationship between the contact induced current at the collection moment and the optimal adjustment threshold, and complete the mobile phone touch operation for the real touch signal.

[0080] When the positions corresponding to the contact areas of the mobile phone screen at two adjacent acquisition moments change, it is determined that the magnetic suspension underwater touch button moves on the surface of the mobile phone screen.

[0081] When the magnetic suspension underwater touch button moves on the surface of the mobile phone screen, the collection moment and all collection moments of continuous movement before the collection moment are identified, and all the identified collection moments are recorded as the previous related collection moments of the collection moment.

[0082] An optimal threshold value for adjustment at the collection moment is determined according to values ​​of the contact induced current and the non-contact induced current at a collection moment prior to the collection moment.

[0083] The number of collection moments at which the contact induced current is non-zero in the collection moments preceding the collection moment is recorded as the first number of collection moments, and the number of collection moments at which the non-contact induced current is zero in the collection moments preceding the collection moment is recorded as the second number of collection moments. The difference between the number 1 and the first number of collection moments is used as the numerator, the difference between the number 1 and the second number of collection moments is used as the denominator, and the difference between the second parameter and the value of the fraction is recorded as the adjustment coefficient for the collection moment. The standard deviation of the difference between the contact induced current and the non-contact induced current at all collection moments preceding the collection moment is recorded as the induced current fluctuation range at the collection moment. The sum of the product of the adjustment coefficient at the collection moment and the induced current fluctuation range and the optimal value of the induced current threshold at the collection moment is recorded as the adjusted optimal threshold for the collection moment.

[0084] The second parameter is a preset parameter. In this embodiment, the value of the second parameter is 0.75.

[0085] When the contact induced current at the collection moment is greater than the adjusted optimal threshold at the collection moment, the contact induced current at the collection moment is marked as a real touch signal, and the mobile phone completes the touch operation according to the touch signal; when the contact induced current at the collection moment is less than or equal to the adjusted optimal threshold at the collection moment, the contact induced current at the collection moment is marked as a false touch signal, and the mobile phone does not complete the touch operation.

[0086] At this point, based on the adjusted optimal threshold at the time of acquisition, the touch screen signal when the magnetic suspension underwater touch button moves on the surface of the mobile phone screen is accurately identified.

[0087] At this point, accurate mobile phone touch control is achieved based on the magnetic suspension underwater touch button device.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A submersible shell for a magnetically suspended underwater touch button device, characterized in that: The following steps are involved: During underwater operation of a mobile phone equipped with a diving case for a magnetically suspended underwater touch button device, the contact area, contact pressure, non-contact area, non-contact pressure, contact induced current, and non-contact induced current are collected at each collection moment when a touch signal appears; Obtaining the possibility of a false touch at the same acquisition moment based on the contact area, contact pressure, non-contact area, and non-contact pressure at the same acquisition moment; establishing a cost function based on the contact induced current, non-contact induced current, and false touch possibility at the acquisition moment, and applying an optimization algorithm to the cost function to obtain an optimal value of the induced current threshold at each acquisition moment; When the magnetically suspended underwater touch button is stationary on the surface of the mobile phone screen, the system distinguishes between real touch signals and false touch signals based on the numerical relationship between the contact induced current and the optimal value of the induced current threshold at the time of collection, and completes the mobile phone touch operation based on the real touch signal; When the magnetic suspension underwater touch button moves on the surface of the mobile phone screen, the previous related collection moment is identified, and the adjustment optimal threshold value at the collection moment is determined based on the values ​​of the contact induced current and the non-contact induced current in the previous related collection moment. According to the numerical relationship between the contact induced current at the collection moment and the adjustment optimal threshold value, the real touch signal and the false touch signal are distinguished, and the mobile phone touch operation is completed for the real touch signal.

2. The submersible shell of a magnetic suspension underwater touch button device according to claim 1, characterized in that: The contact induced current and the non-contact induced current are: The maximum value of the induced current at all positions within the contact area at the time of collection is recorded as the contact induced current at the time of collection; The maximum value of the induced current at all positions within the non-contact area at the time of collection is recorded as the non-contact induced current at the time of collection.

3. The submersible housing for a magnetic suspension underwater touch button device according to claim 1, characterized in that: The method for obtaining the possibility of false touch at the acquisition moment is: The product of the contact area and the contact pressure at the time of collection is recorded as the contact characteristic value at the time of collection; the product of the non-contact area and the non-contact pressure at the time of collection is recorded as the non-contact characteristic value at the time of collection; The absolute value of the difference between the contact feature value and the non-contact feature value at the acquisition moment is recorded as the contact feature difference at the acquisition moment; The normalized value of the ratio of the sum of the non-contact feature value and the preset first parameter at the acquisition moment to the contact feature difference is recorded as the false touch possibility at the acquisition moment.

4. The submersible housing for a magnetic suspension underwater touch button device according to claim 1, characterized in that: The cost function is: C(I,t,λ)=Q(t)+λ×(max(0,I1(t)-I)+max(0,I-I2(t))) Where C(I, t, λ) represents the cost function at acquisition time t, with the penalty coefficient λ and the induced current threshold I; I represents the induced current threshold; t represents the acquisition time; λ represents the penalty coefficient; Q(t) represents the probability of false touch at acquisition time t; I1(t) represents the contact induced current at acquisition time t; I2(t) represents the non-contact induced current at acquisition time t; and max() represents the maximum value function.

5. The submersible housing for a magnetic suspension underwater touch button device according to claim 1, characterized in that: When the magnetically suspended underwater touch button is stationary on the surface of the mobile phone screen, the real touch signal and the false touch signal are distinguished according to the numerical relationship between the contact induced current at the time of collection and the optimal value of the induced current threshold, including the specific steps of: When the position corresponding to the contact area of ​​the mobile phone screen at two adjacent acquisition moments remains unchanged, it is determined that the magnetic suspension underwater touch button is stationary on the surface of the mobile phone screen; When the touch induced current at the acquisition moment is greater than the optimal value of the induced current threshold at the acquisition moment, the touch induced current at the acquisition moment is marked as a real touch signal; When the contact induced current at the acquisition moment is less than or equal to the optimal value of the induced current threshold at the acquisition moment, the contact induced current at the acquisition moment is marked as a false touch signal.

6. The submersible housing for a magnetic suspension underwater touch button device according to claim 1, characterized in that: When the magnetic suspension underwater touch button moves on the surface of the mobile phone screen, identifying the previous related collection moment of the collection moment includes the following specific steps: When the positions corresponding to the contact areas of the mobile phone screen at two adjacent acquisition moments change, it is determined that the magnetic suspension underwater touch button has moved on the surface of the mobile phone screen; The collection moment and the collection moments before and after the collection moment when the magnetic suspension underwater touch button moves on the surface of the mobile phone screen are recorded as the previous relevant collection moments of the collection moment.

7. The submersible housing for a magnetic suspension underwater touch button device according to claim 1, characterized in that: The method for determining the optimal threshold value for adjusting the acquisition time is: Recording the number of collection moments at which the contact induced current is not zero in the collection moments preceding the collection moment as a first number of collection moments, and recording the number of collection moments at which the non-contact induced current is zero in the collection moments preceding the collection moment as a second number of collection moments; using the difference between the number 1 and the first number of collection moments as the numerator, and the difference between the number 1 and the second number of collection moments as the denominator, to establish a fraction, and recording the difference between the value of the preset second parameter and the value of the fraction as an adjustment coefficient for the collection moment; The standard deviation of the difference between the contact induced current and the non-contact induced current at all previous related collection moments of the collection moment is recorded as the induced current fluctuation range at the collection moment; The sum of the product of the adjustment coefficient and the induced current fluctuation range at the acquisition time and the optimal value of the induced current threshold at the acquisition time is recorded as the adjustment optimal threshold at the acquisition time.

8. The submersible housing for a magnetic suspension underwater touch button device according to claim 1, characterized in that: The method of distinguishing true touch signals from false touch signals based on the numerical relationship between the touch induced current at the acquisition moment and the adjusted optimal threshold value includes the following specific methods: When the touch induced current at the acquisition moment is greater than the adjusted optimal threshold at the acquisition moment, the touch induced current at the acquisition moment is marked as a real touch signal; When the contact induced current at the acquisition moment is less than or equal to the adjusted optimal threshold at the acquisition moment, the contact induced current at the acquisition moment is marked as a false touch signal.

9. The submersible housing for a magnetic suspension underwater touch button device according to claim 1, characterized in that: The watertight compartment of the diving shell of the magnetic suspension underwater touch button device includes: Waterproof layer transparent contact piece, inner mobile phone screen touch screen film, lock buckle, fixed expansion handle thread, shutter key control PCB, shutter socket, connecting wire, diving shell lower cover, diving shell upper cover, magnetic suspension button embedded layer, waterproof compartment and magnetic suspension button leakage layer.

10. The submersible housing for a magnetic suspension underwater touch button device according to claim 1, characterized in that: The lower cover of the diving case of the magnetic suspension underwater touch button device includes: Charging hole, shutter button, phone fixing suction cup, side buttons, metal shrapnel and rear view window.

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