Smart mat and multi-point detection method for smart mat

Abstract

A smart mat and a multi-point detection method for a smart mat. The smart mat comprises: a first surface layer (110), a second surface layer (120), a pressure change sensing layer (200) and a detection module, the pressure change sensing layer (200) being located between the first surface layer (110) and the second surface layer (120). The pressure change sensing layer (200) comprises a first electrode layer (210), a conductive layer (230) and a second electrode layer (220); the first electrode layer (210) comprises a plurality of first wires (211) extending in a first direction and arranged at intervals; the second electrode layer (220) comprises a plurality of second wires (221) extending in a second direction and arranged at intervals; the conductive layer (230) comprises a plurality of conductive strips (231) extending in the first direction and arranged at intervals, the plurality of conductive strips (231) and the plurality of first wires (211) being arranged on an one-to-one basis. The detection module is separately connected to the plurality of first wires (211) and the plurality of second wires (221). The detection module inputs a detection signal into the plurality of first wires (211) one by one, and acquires electrical signals from the plurality of second wires (221), so as to output a position signal of a first wire (211) and second wire (221) of which the electrical signal has changed.

Description

Smart mat and multi-point detection method of smart mat

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311195487.9, filed on September 15, 2023, entitled “Smart Mat and Multi-point Detection Method for Smart Mat.” The disclosure of the above-mentioned Chinese patent application is hereby incorporated by reference in its entirety as part of this application. Technical Field

[0003] The present disclosure relates to the technical field of smart mats, and in particular to a smart mat and a multi-point detection method for the smart mat. Background Art

[0004] As people's living standards continue to improve, more and more people begin to pay attention to physical exercise, such as exercising on fitness mats (yoga mats, dance mats). However, due to the practitioners' insufficient mastery of related movements, it is easy for the practitioners to perform movements that are not standard or even make wrong movements, which may cause muscle or bone damage to the practitioners at the mildest, and serious injuries to the practitioners at the worst. For example, due to factors such as high work intensity and high pressure, people now pay more and more attention to sleep quality. When resting and sleeping on a mattress, they need to understand their own sleep quality.

[0005] To guide exercisers in following standard movements when using a smart fitness mat, the force-applying location on the mat can be located and then compared with a reference location to help users determine the accuracy of their current position. Alternatively, to sense the body's position on the mattress, the force-applying location on the smart sensing mattress can be located and analyzed to understand the user's sleeping habits. Therefore, there is an urgent need for a smart sensing mat with a positioning function and highly accurate positioning results.

[0006] Summary of the Invention

[0007] The purpose of the embodiments of the present disclosure is to provide a smart mat and a multi-point detection method for the smart mat, thereby improving the positioning accuracy of the smart mat.

[0008] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by practice of the present disclosure.

[0009] According to one aspect of the present disclosure, a smart mat is provided, comprising:

[0010] a first surface layer and a second surface layer, wherein the first surface layer and the second surface layer are arranged opposite to each other;

[0011] a pressure-variable sensing layer, the pressure-variable sensing layer being located between the first surface layer and the second surface layer; the pressure-variable sensing layer comprising a first electrode layer, a conductive layer, and a second electrode layer stacked in sequence; the first electrode layer comprising a plurality of first conductive lines extending and spaced apart in a first direction, the second electrode layer comprising a plurality of second conductive lines extending and spaced apart in a second direction, the first direction intersecting the second direction; the conductive layer comprising a plurality of conductive strips extending and spaced apart in the first direction, the plurality of conductive strips being arranged in a one-to-one correspondence with the plurality of first conductive lines;

[0012] A detection module, wherein the detection module is respectively connected to the plurality of first conductive wires and the plurality of second conductive wires; the detection module inputs a detection signal into the plurality of first conductive wires one by one and obtains the electrical signal in the plurality of second conductive wires, thereby outputting a position signal of the first conductive wire and the second conductive wire indicating that the electrical signal between the plurality of first conductive wires and the plurality of second conductive wires has changed.

[0013] In an exemplary embodiment of the present disclosure, the detection module inputs a detection signal to each of the plurality of first conductive lines one by one, including:

[0014] In one detection cycle, the detection module inputs a high level to each of the plurality of first wires one by one, and inputs a low level to each of the plurality of first wires other than the first wires inputting the high level.

[0015] In an exemplary embodiment of the present disclosure, the detection module includes:

[0016] A plurality of acquisition end circuits are connected to the plurality of second wires in a one-to-one correspondence; the acquisition end circuit includes a first selection switch, the first selection switch includes a throw terminal, a first terminal, and a second terminal, the throw terminal is connected to the second wire, the first terminal is configured to connect to the sampling circuit, and the second terminal is grounded.

[0017] In an exemplary embodiment of the present disclosure, the acquisition end circuit further includes: a sampling and holding capacitor, a first electrode of the sampling and holding capacitor is connected to the second wire and the throw end, and a second electrode of the sampling and holding capacitor is grounded.

[0018] In an exemplary embodiment of the present disclosure, the acquisition end circuit further includes: a sampling resistor, a first end of the sampling resistor is connected to the second wire and the throw end, and a second end of the sampling resistor is grounded.

[0019] In an exemplary embodiment of the present disclosure, the detection module further includes:

[0020] A plurality of second selection switches are connected one-to-one with the plurality of first wires, the second selection switches include a throw terminal, a first terminal, and a second terminal, the throw terminal is connected to the second wire, the first terminal is configured to connect to a drive circuit, and the second terminal is grounded.

[0021] In an exemplary embodiment of the present disclosure, the smart mat further includes:

[0022] A communication module is connected to the detection module, and is configured to transmit the detection data acquired by the detection module to a target terminal.

[0023] In an exemplary embodiment of the present disclosure, a length of the first conductive line along the first direction is greater than a length of the second conductive line along the second direction.

[0024] In an exemplary embodiment of the present disclosure, the number of the conductive strips is the same as the number of the first conductive wires.

[0025] In an exemplary embodiment of the present disclosure, the conductive layer is a conductive carbon film, and the conductive carbon film is separated to form a plurality of conductive carbon strips to serve as the plurality of conductive strips.

[0026] According to another aspect of the present disclosure, a multi-point detection method for a smart mat is provided, the multi-point detection method for a smart mat comprising:

[0027] A smart mat is provided, comprising a first surface layer, a second surface layer, a pressure-variable sensing layer, and a detection module, wherein the first surface layer and the second surface layer are arranged opposite each other, and the pressure-variable sensing layer is located between the first surface layer and the second surface layer; the pressure-variable sensing layer comprises a first electrode layer, a conductive layer, and a second electrode layer stacked in sequence; the first electrode layer comprises a plurality of first conductive lines extending and spaced apart in a first direction, the second electrode layer comprises a plurality of second conductive lines extending and spaced apart in a second direction, the first direction intersecting the second direction; the conductive layer comprises a plurality of conductive strips extending and spaced apart in the first direction, the plurality of conductive strips being arranged in a one-to-one correspondence with the plurality of first conductive lines; and the detection module is connected to the plurality of first conductive lines and the plurality of second conductive lines, respectively.

[0028] acquiring, by the detection module, standard electrical signals of a plurality of detection points formed between the plurality of first conductive lines and the plurality of second conductive lines when the smart mat is in a non-squeezed state;

[0029] In a detection cycle, a detection signal is input to one of the plurality of first conductive wires through the detection module; and a second conductive wire among the plurality of second conductive wires, at which an electrical signal changes between the first conductive wire to which the detection signal is input and the second conductive wire, is obtained through the detection module; wherein, if a difference between an electrical signal at a detection point formed between the plurality of second conductive wires and the first conductive wire to which the detection signal is input and a corresponding standard electrical signal is greater than a preset value, it is determined that the electrical signal has changed;

[0030] Entering the next detection cycle, the steps of the previous detection cycle are repeated until all the first wires are input with the detection signal in sequence for detection.

[0031] In an exemplary embodiment of the present disclosure, in one detection cycle, after the detection module is discharged for a preset time, a detection signal is input to one of the plurality of first conductive lines through the detection module.

[0032] The smart mat provided by the present disclosure has a pressure-variable sensing layer located between a first surface layer and a second surface layer, and the pressure-variable sensing layer is protected by the first surface layer and the second surface layer; in the direction from the first surface layer to the second surface layer, the pressure-variable sensing layer includes a first electrode layer, a conductive layer, and a second electrode layer stacked in sequence; the first electrode layer includes a plurality of first wires extending in a first direction and spaced apart, and the second electrode layer includes a plurality of second wires extending in a second direction and spaced apart; by arranging the plurality of conductive strips in one-to-one correspondence with the plurality of first wires, that is, when the first wire corresponding to the pressure position of the fitness mat is subjected to pressure, the squeezing force of the first and second wires on the corresponding conductive strip below it changes The conductive strip is larger, and the contact area between the conductive strip and the first conductive strip and the second conductive strip is larger, thereby changing the resistance so that the resistance between the first conductive strip and the second conductive strip becomes smaller; the detection module is connected to the plurality of first conductive strips and the plurality of second conductive strips respectively; the detection module inputs detection signals to the plurality of first conductive strips one by one and obtains electrical signals from the plurality of second conductive strips, thereby outputting position signals of the first conductive strip and the second conductive strip whose resistance between the plurality of first conductive strips and the plurality of second conductive strips changes, thereby judging the pressed position of the fitness mat through the position of the first conductive strip and the second conductive strip whose resistance between them changes, and feeding back the pressed position to the user for reference, thereby identifying the stepping position of the human body and assisting in judging whether the fitness movement is standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0034] FIG1 is a schematic diagram of a smart mat provided by an embodiment of the present disclosure.

[0035] FIG2 is an exploded view of a smart mat provided by an embodiment of the present disclosure.

[0036] FIG3 is an exploded view of a pressure-dependent sensing layer provided by an embodiment of the present disclosure.

[0037] FIG4 is a schematic diagram of a first electrode layer provided by an embodiment of the present disclosure.

[0038] FIG5 is a schematic diagram of a second electrode layer provided by an embodiment of the present disclosure.

[0039] FIG6 is a schematic diagram of a conductive layer provided by an embodiment of the present disclosure.

[0040] FIG7 is a schematic diagram of an equivalent circuit of a conductive layer provided by the present disclosure.

[0041] FIG8 is a schematic diagram of an equivalent circuit between the first conductive line, the second conductive line and the conductive layer provided by the present disclosure.

[0042] FIG9 is a schematic diagram of an equivalent circuit of the first electrode layer provided by the present disclosure.

[0043] FIG10 is a schematic diagram of an equivalent circuit of a first electrode layer provided in an embodiment of the present disclosure.

[0044] FIG11 is a schematic diagram showing a misjudgment in an equivalent circuit of a first conductive line and a second conductive line provided by the present disclosure.

[0045] FIG12 is a schematic diagram of eliminating misjudgment in an equivalent circuit of a first conductive line and a second conductive line according to an embodiment of the present disclosure.

[0046] FIG13 is a schematic diagram of a pressure-variable sensing layer and a sampling circuit provided in an embodiment of the present disclosure.

[0047] FIG14 is a schematic diagram of a second selection switch provided in an embodiment of the present disclosure.

[0048] Description of reference numerals:

[0049] 110, first surface layer; 120, second surface layer;

[0050] 200, pressure-sensitive layer; 210, first electrode layer; 211, first wire; 220, second electrode layer; 221, second wire; 230, conductive layer; 231, conductive strip; 240, first selection switch; 250, second selection switch;

[0051] 300, detection circuit;

[0052] 400, flexible circuit board cable buckle;

[0053] 500, housing; 510, first housing; 520, second housing;

[0054] 600. Shade;

[0055] 700. Battery. DETAILED DESCRIPTION

[0056] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0057] In addition, the described features, structures or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, well-known methods, devices, implementations or operations are not shown or described in detail to avoid blurring various aspects of the present disclosure.

[0058] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0059] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0060] The embodiment of the present disclosure first provides a smart mat, as shown in Figures 1 to 6, the smart mat includes: a first surface layer 110, a second surface layer 120, a pressure-sensitive layer 200 and a detection module, the first surface layer 110 and the second surface layer 120 are arranged opposite to each other, and the pressure-sensitive layer 200 is located between the first surface layer 110 and the second surface layer 120; the pressure-sensitive layer 200 includes a first electrode layer 210, a conductive layer 230 and a second electrode layer 220 stacked in sequence; the first electrode layer 210 includes a plurality of first wires 211 extending along a first direction X and spaced apart, and the second electrode layer 220 includes a plurality of first wires 211 extending along a second direction Y and spaced apart. The first direction X and the second direction Y intersect. The conductive layer 230 includes a plurality of conductive strips 231 extending along the first direction X and spaced apart. The plurality of conductive strips 231 are arranged in a one-to-one correspondence with the plurality of first conductive strips 211. The detection module is connected to the plurality of first conductive strips 211 and the plurality of second conductive strips 221. The detection module inputs detection signals to each of the plurality of first conductive strips 211 and obtains electrical signals from the plurality of second conductive strips 221, thereby outputting position signals of the first conductive strips 211 and the second conductive strips 221, indicating changes in the electrical signals between the plurality of first conductive strips 211 and the plurality of second conductive strips 221. The electrical signal may be at least one of resistance, voltage, and current.

[0061] The smart mat provided by the present disclosure has a pressure-variable sensing layer 200 located between the first surface layer 110 and the second surface layer 120, and the pressure-variable sensing layer 200 is protected by the first surface layer 110 and the second surface layer 120; in the direction from the first surface layer 110 to the second surface layer 120, the pressure-variable sensing layer 200 includes a first electrode layer 210, a conductive layer 230 and a second electrode layer 220 stacked in sequence; the first electrode layer 210 includes a plurality of first wires 211 extending along a first direction X and spaced apart, and the second electrode layer 220 includes a plurality of second wires 221 extending along a second direction Y and spaced apart; by arranging the plurality of conductive strips 231 in one-to-one correspondence with the plurality of first wires 211, that is, when the first wire 211 corresponding to the pressure position of the fitness mat is subjected to pressure, the squeezing force of the first wire 211 and the second wire 221 on the corresponding conductive strip 231 below it becomes greater, so that the conductive strip 231 The contact area between the electric strip 231 and the first and second wires 211 and 221 increases, thereby changing the resistance so that the resistance between the first and second wires 211 and 221 decreases. The detection module is connected to the plurality of first wires 211 and the plurality of second wires 221 respectively. The detection module inputs detection signals into the plurality of first wires 211 one by one, obtains electrical signals from the plurality of second wires 221, compares the obtained electrical signals with the standard electrical signals of the corresponding detection points obtained when the fitness mat is not compressed, and outputs the first and second wires 211 and 221 between the plurality of first wires 211 and the plurality of second wires 221 whose resistance changes. The compressed position of the fitness mat is determined by the position of the first and second wires 211 and 221 where the electrical signals change, and the compressed position is fed back to the user for reference, thereby identifying the human stepping position and assisting in determining whether the fitness movement is standard.

[0062] Specifically, as shown in Figures 3 to 5, the length of the first wire 211 along the first direction X is greater than the length of the second wire 221 along the second direction Y. Since the first electrode layer 210 and the second electrode layer 220 have the same dimensions along the first direction X and the second direction Y, that is, the length of the first wire 211 is equivalent to the length of the second electrode layer 220, and the length of the second wire 221 is equivalent to the width of the first electrode layer 210, the number of the second wires 221 is greater than the number of the first wires 211.

[0063] The first direction X is perpendicular to the second direction Y, that is, the first electrode layer 210 and the second electrode layer 220 are rectangular, and the pressure-dependent sensing layer 200 formed by the first electrode layer 210 and the second electrode layer 220 is rectangular. Of course, the angle between the first direction X and the second direction Y can also be less than 90° or greater than 90°, and this disclosure does not limit this.

[0064] In one embodiment, the first surface layer 110 and the second surface layer 120 of the fitness mat may be made of TPU material, and the edges of the first surface layer 110 and the second surface layer 120 are sealed to form a sealed cavity between the first surface layer 110 and the second surface layer 120. The edges of the first surface layer 110 and the second surface layer 120 may be sealed by insulating adhesive bonding, sewing, weaving, etc., which is not limited in this disclosure.

[0065] The pressure-sensitive layer 200 is located between the first surface layer 110 and the second surface layer 120. The first electrode layer 210 can be fixedly connected to the first surface layer 110, and the second electrode layer 220 can be fixedly connected to the second surface layer 120. The materials used in the first surface layer 110 and the second surface layer 120 have excellent deformation and self-recovery capabilities, so that they can produce elastic deformation when an external force is applied and can return to their original state after the external force is removed. This drives the first electrode layer 210 and the second electrode layer 220 to return to their original state after the external force is removed, thereby restoring the contact area between the first electrode layer 210 and the second electrode layer 220 and the conductive layer 230.

[0066] The first electrode layer 210 and the first surface layer 110 may be connected by bonding, sewing, or the like, and the second electrode layer 220 and the second surface layer 120 may be connected by bonding, sewing, or the like.

[0067] In one embodiment, the fitness mat further includes an insulating layer, with an insulating layer between the first electrode layer 210 and the first surface layer 110, and an insulating layer between the second electrode layer 220 and the second surface layer 120. The insulating layer provides insulation to the fitness mat, thereby preventing electric shock to the user due to leakage from the voltage-dependent sensing layer 200 when using the fitness mat. Alternatively, both the first surface layer 110 and the second surface layer 120 may be directly supported by insulating materials to achieve the insulation performance of the fitness mat.

[0068] In one embodiment, as shown in FIG3 , the first electrode layer 210, the conductive layer 230, and the second electrode layer 220 are sequentially stacked together, so that the first electrode layer 210, the second electrode layer 220, and the conductive layer 230 have electrical conduction on opposite sides thereof. The first electrode layer 210, the conductive layer 230, and the second electrode layer 220 can be sequentially stacked and then sewn together as a whole.

[0069] As shown in FIG4 , the first electrode layer 210 includes a first substrate and a plurality of first conductive wires 211. The plurality of first conductive wires 211 are located on the first substrate. The first substrate may be, for example, a non-woven fabric, and the first conductive wires 211 may be, for example, aluminum foil or copper foil to improve the conductivity of the first conductive wires 211 and reduce the internal resistance of the first conductive wires 211. Of course, the plurality of first conductive wires 211 may also be, for example, a printed conductive layer containing carbon powder. The plurality of first conductive wires 211 may be pre-formed on the first substrate by printing, or the plurality of first conductive wires 211 may be adhered to the first substrate using double-sided tape.

[0070] As shown in FIG5 , the second electrode layer 220 includes a second substrate and a plurality of second conductive wires 221. The plurality of second conductive wires 221 are located on the second substrate. The second substrate may be, for example, a non-woven fabric, and the second conductive wires 221 may be, for example, aluminum foil or copper foil to improve the conductivity of the second conductive wires 221 and reduce the internal resistance of the second conductive wires 221. Alternatively, the plurality of second conductive wires 221 may be, for example, a printed conductive layer containing carbon powder. The plurality of second conductive wires 221 may be pre-formed on the second substrate by printing, or may be adhered to the second substrate using double-sided tape.

[0071] In one embodiment, as shown in FIG6 , the conductive layer 230 may be made of a conductive carbon film, i.e., the plurality of conductive strips 231 are strips of carbon film. When compressed, the contact area between the strips of carbon film and the first and second conductive wires 211, 221 increases, causing a significant change in the resistance between the strips of carbon film and the first and second conductive wires 211, 221. This, in turn, changes the resistance between the corresponding first and second conductive wires 211, 221 when squeezed. The conductive carbon film is relatively thin, and its use in a fitness mat does not affect the overall thickness of the mat, nor does it form noticeable bumps within the mat, thereby enhancing the user experience.

[0072] Specifically, as shown in FIG7 , since the conductive carbon film itself is also a conductor, the potential change at any point during the matrix sampling process will inevitably affect the entire conductive carbon film. The change in the resistance of the conductive carbon film caused by pressure is achieved by changing the area of ​​the contact resistance in the thickness direction of the smart pad, thereby changing the size of the resistance. That is, the resistance at a certain point can be regarded as the sum of the upper and lower contact resistances of the conductive carbon film, that is, the sum of R1 and R2 as shown in FIG8 . This change in size has nothing to do with deformation and is only positively correlated with the size of the contact area that is changed by the force. Among them, L1, L2, L3, and L4 in FIG7 are multiple first wires arranged in sequence, R1, R2, and R3 are multiple second wires arranged in sequence, and R is the equivalent resistance of the conductive layer 230 between the first wire 211 and the second wire 221. R10 and R20 in FIG8 are the contact resistance of the conductive layer 230 between the first wire 211 and the second wire 221.

[0073] As shown in the equivalent circuit of the conductive carbon film in Figure 8, when the column is energized and the row is observed, the observed resistance R 总 =R1+R', where R' is the parallel value of the contact resistance R2 and the equivalent resistance on the same surface. When R>>R2 is satisfied, R'=R2 / n, and R is the approximate average resistance of the conductive carbon film averaged over each column. However, the resistance value of R is negatively correlated with the length of the first wire 211, and it is difficult to achieve R>>R2. Therefore, R'=R2 / n (n is the number of second wires) is not true in reality. The value of R' is related to the length of the first wire 211, the conductivity of the conductive carbon film, and the tightness between the conductive carbon film and the second electrode layer 220 during manufacturing, that is, R2.

[0074] Figure 9 shows the equivalent circuit for the same row. It can be seen that when pressed, the contact resistance R1X of the upper layer of the conductive carbon film in the same row becomes very small. Due to the existence of resistance R, there is always a loop from the power supply through the conductive carbon film to the row. The observed resistance at any point is affected by the squeeze point, which can cause misjudgment. Furthermore, because the contact area varies due to the manufacturing process, the upper and lower contact resistances are not constant. Therefore, the observed point in the same row is actually the minimum value that can be observed in that row, which can cause some areas to be insensitive to pressure. R1X (X = 1-5) and R2X (X = 1-5) are the contact resistances between the first wire 211 and the second wire 221.

[0075] As shown in FIG10 , the present disclosure divides the carbon film to form a plurality of strip-shaped carbon films that do not affect each other. At this time, the detected resistance R=R1+R2 can eliminate the interference between the horizontal columns, so that when the first wire 211 is energized in sequence, the electric potential will not be crosstalked between the left and right, thereby avoiding the occurrence of misjudgment caused by the non-extruded point being affected by the squeezed point during sampling.

[0076] In one embodiment, the conductive carbon film may include a plastic film and conductive carbon powder evenly distributed within the plastic film. The resistance of the conductive carbon film can be adjusted by adjusting the carbon powder ratio. A higher carbon powder content results in higher conductivity and lower resistance. In other words, the resistance of the conductive carbon film is related to the contact area between the first conductive wire 211, the second conductive wire 221, and the conductive carbon film, as well as the carbon powder content in the conductive carbon film. A greater contact area between the first conductive wire 211, the second conductive wire 221, and the conductive carbon film results in lower resistance, and a higher carbon powder content in the conductive carbon film results in lower resistance.

[0077] Because the resistance change between the conductive carbon film and the first and second electrode layers 210 and 220 differs from the behavior of creep-prone materials like fabric, the change in resistance of the carbon film itself due to compression is minimal. The change in resistance occurs primarily through changes in the contact area between the upper and lower metal conductive layers and the carbon film. The manufacturing process of the conductive carbon film itself prevents a completely uniform distribution of carbon powder on the surface, resulting in poor resistance consistency across the conductive carbon film. This makes the use of a unified standard unsuitable for such poor consistency. The present disclosure can obtain the electrical signals of multiple detection points formed between the multiple first wires 211 and the multiple second wires 221 through the detection circuit, and use the obtained electrical signals of each detection point between the multiple first wires 211 and the multiple second wires 221 as a reference standard electrical signal; in the subsequent detection process, the obtained electrical signals of the detection points are compared with the pre-acquired standard electrical signals, and it is judged whether the point is compressed or squeezed based on the change of the electrical signals. Each detection point is compared with itself, avoiding the situation where the electrical signals of each detection point are inconsistent and cause misjudgment when the carbon powder on the surface cannot be completely evenly distributed due to the manufacturing process of the conductive carbon film itself, thereby improving the accuracy of detection.

[0078] As shown in Figure 11, the circled points in the figure are real squeeze points. During the scanning process, L1 is energized. Since the squeeze resistance of points (L3, R3), (L2, R3), (L2, R1), and (L1, R3) decreases, the observation point (L1, R1) is judged to be squeezed due to the presence of a high level, which in turn causes the non-pressed points to be affected by the squeeze points and be misjudged.

[0079] As shown in Figure 2, the detection module includes a detection circuit 300, which periodically inputs a detection signal to the first wire 211 in the first electrode layer 210 through the detection circuit 300, and samples the second wire 221 through the detection circuit 300, so as to determine the positions of the first wire 211 and the second wire 221 with reduced resistance among the multiple first wires 211 and the multiple second wires 221.

[0080] Specifically, within a detection cycle, a high level is input into the multiple first wires 211 one by one through the detection module, and a low level is input into the first wires 211 other than the first wires 211 that input the high level among the multiple first wires 211; then the sampling circuit is used to determine whether there is a wire with reduced resistance in the circuit of the multiple second wires 221; if so, it is determined that the positions of the first wire 211 that inputs the high level and the second wire 221 where the resistance reduction is detected are squeezed; if not, it is determined that the position corresponding to the first wire 211 that inputs the high level is not squeezed; the detection is carried out in this way until all the first wires 211 are input with a high level for detection in turn; after all the first wires 211 are input with a high level for detection in turn, a detection cycle is completed, and after completing a detection cycle, the pressure position information can be output through the detection module; then the next detection cycle is entered, and this cycle is repeated, so that the smart mat can monitor and feedback the pressure position in real time when in use.

[0081] As shown in Figure 12, a high level is input into the multiple first wires 211 one by one through the detection module, and a low level is input into the first wires 211 other than the first wires 211 that input the high level. At this time, since the point (L2, R1) is connected to the low level, the level on the R1 row will also be a low level, and it is judged that there is no squeezing.

[0082] In one embodiment, as shown in FIG13 , the detection module includes: multiple acquisition terminal circuits, each of which is connected to a plurality of second conductive lines 221 in a one-to-one correspondence; the acquisition terminal circuit includes a first selection switch 240, which includes a throw terminal, a first terminal, and a second terminal. The throw terminal is connected to the second conductive line 221, the first terminal being configured to connect to the sampling circuit, and the second terminal being grounded. The first selection switch 240 controls the throw terminal to connect the throw terminal to either the first terminal or the second terminal. During a detection cycle, the throw terminal connects to the first terminal, thereby connecting the sampling circuit to the second conductive line 221, thereby enabling sampling of the second conductive line 221. The throw terminal connects to the second terminal, connecting the second conductive line 221 to the ground segment, thereby discharging any residual charge in the circuit, awaiting the next sampling cycle.

[0083] As shown in FIG13 , the acquisition end circuit further includes: a sampling and holding capacitor C, wherein the first electrode of the sampling and holding capacitor C is connected to the second wire 221 and the throw terminal, and the second electrode of the sampling and holding capacitor C is grounded. The sampling and holding capacitor C is used to achieve voltage stabilization, so that the pressure on the wire can be stabilized at the target voltage during detection, thereby improving the accuracy of the detection result. In addition, by connecting the throw terminal to the second terminal, a discharge circuit is formed, which can discharge the sampling and holding capacitor C and wait for the next sampling cycle. The discharge time can be set according to the size of the holding capacitor and the parasitic capacitance.

[0084] As shown in FIG13 , the acquisition circuit further includes a sampling resistor R0, a first end of which is connected to the second wire 221 and the throw terminal, and a second end of which is grounded. By providing the sampling resistor R0, the sampling circuit acquires the voltage across the sampling resistor R0 during sampling. The change in the voltage across the sampling resistor R0 can be used to determine the change in resistance between the first wire 211 and the second wire 221, thereby determining whether the corresponding locations of the first wire 211 and the second wire 221 being tested are being squeezed.

[0085] In one embodiment, as shown in FIG14 , the detection module further includes: a plurality of second selection switches 250 , wherein the plurality of second selection switches 250 are connected one-to-one with the plurality of first wires 211 , and the second selection switches 250 include a throw terminal, a first wiring terminal, and a second wiring terminal, wherein the throw terminal is connected to the second wire 221 , the first wiring terminal is configured to be connected to the drive circuit, and the second wiring terminal is grounded.

[0086] Among them, within a detection cycle, a high level is input to multiple first wires 211 one by one through the detection module, and the throw end of the second selection switch 250 connected to one of the first wires 211 is connected to the first terminal, so that the first wire 211 inputs a high level (VCC), and the throw ends of the second selection switches 250 connected to the remaining first wires 211 are connected to the second terminal, so that the remaining first wires 211 input a low level; by controlling the second selection switches 250 connected to multiple wires one by one, high levels are input to multiple first wires 211 for detection.

[0087] In one embodiment, the smart mat further includes: a communication module, the communication module is connected to the detection module, and the communication module is configured to transmit the detection data acquired by the detection module to the target terminal.

[0088] Specifically, the data collected by the detection circuit is quantified and then communicated wirelessly or wired to a mobile phone or other electronic terminal to provide feedback of the pedaling position information to the user. The communication method can be, for example, wireless means such as Bluetooth, Wi-Fi, and 2.4G, or wired means such as Ethernet and USB, and this disclosure does not limit this.

[0089] In one embodiment, as shown in Figures 1 and 2, the smart mat further includes: a shell 500, which is formed by snapping together a first shell 510 and a second shell 520. The first shell 510 and the second shell 520 are snapped together to form an accommodating space, and the flexible circuit board cable buckle 400 is accommodated in the accommodating space. The shell 500 forms protection for the flexible circuit board cable buckle 400.

[0090] The housing 500 also contains a battery 700, which powers the flexible circuit board cable clip 400 and, in turn, the entire detection circuit 300. The battery 700 can be a removable secondary battery 700 for easy replacement and charging, or a non-removable secondary battery 700 that can be charged via a charging port.

[0091] The housing 500 is provided with a viewing window, and the flexible circuit board cable clip 400 is provided with an indicator light. The indicator light signal can be observed through the viewing window. A detachable or removable light shield 600 is provided above the viewing window to facilitate observation of the indicator light signal. The light shield 600 prevents the indicator light signal from being exposed to the user for extended periods and obstructing their vision. The light signal can be, for example, a battery charge signal or a circuit board functioning properly signal, and this disclosure is not limited thereto.

[0092] An embodiment of the present disclosure further provides a multi-point detection method for a smart mat, the multi-point detection method for a smart mat comprising:

[0093] Step S100: providing the smart mat provided in the above embodiment;

[0094] Step S200: acquiring, by the detection module, standard electrical signals of detection points formed between the plurality of first conductive lines and the plurality of second conductive lines when the smart mat is in an uncompressed state;

[0095] In one detection cycle, in step S310, a detection signal is input to one of the multiple first wires through the detection module; in step S320, the detection module obtains a second wire among the multiple second wires whose electrical signal changes between the first wire to which the detection signal is input.

[0096] Entering the next detection cycle, the steps of the previous detection cycle (step S310 and step S320) are repeated until all the first wires are sequentially input with the detection signal for detection.

[0097] Specifically, the smart mat includes: a first surface layer 110, a second surface layer 120, a pressure-sensitive layer 200, and a detection module. The first surface layer 110 and the second surface layer 120 are arranged opposite each other, and the pressure-sensitive layer 200 is located between the first surface layer 110 and the second surface layer 120. The pressure-sensitive layer 200 includes a first electrode layer 210, a conductive layer 230, and a second electrode layer 220 stacked in sequence. The first electrode layer 210 includes a plurality of first conductive lines 211 extending and spaced apart along a first direction X, and the second electrode layer 220 includes a plurality of second conductive lines 221 extending and spaced apart along a second direction Y, where the first direction X intersects the second direction Y. The conductive layer 230 includes a plurality of conductive strips 231 extending and spaced apart along the first direction X, and the plurality of conductive strips 231 are arranged in a one-to-one correspondence with the plurality of first conductive lines 211. The detection module is connected to the plurality of first conductive lines 211 and the plurality of second conductive lines 221, respectively. For more specific details of the smart mat, please refer to the detailed description of the smart mat embodiment above and will not be repeated here.

[0098] Specifically, in step S200, before testing, all locations on the fitness mat are maintained in an uncompressed state. Then, the detection circuit acquires electrical signals from multiple detection points formed between the plurality of first conductive lines 211 and the plurality of second conductive lines 221. The acquired electrical signals from each detection point between the plurality of first conductive lines 211 and the plurality of second conductive lines 221 are used as reference standard electrical signals. The electrical signal may be at least one of resistance, voltage, and current.

[0099] Specifically, in step S310 , a detection signal is input to one of the plurality of first wires 211 through the detection module, and a low level is input to the first wires 211 other than the first wires 211 inputting a high level among the plurality of first wires 211 .

[0100] As shown in FIG14 , the detection module further includes: a plurality of second selection switches 250, each of which is connected to a plurality of first conductive lines 211 in a one-to-one correspondence. The second selection switches 250 include a throw terminal, a first terminal, and a second terminal. The throw terminal is connected to the second conductive line 221, the first terminal is configured to be connected to a drive circuit, and the second terminal is grounded. During a detection cycle, when a high level is input to each of the plurality of first conductive lines 211 through the detection module, the throw terminal of the second selection switch 250 connected to one of the first conductive lines 211 is connected to the first terminal, thereby inputting a high level (VCC) to the first conductive line 211, and the throw terminals of the second selection switches 250 connected to the remaining first conductive lines 211 are connected to the second terminal, thereby inputting a low level to the remaining first conductive lines 211. By controlling the second selection switches 250 connected to the plurality of conductive lines one by one, a high level is input to each of the plurality of first conductive lines 211 for detection.

[0101] Specifically, in step S320, the detection circuit 300 of the detection module samples the plurality of second conductors 221, thereby determining the second conductor 221 where the electrical signal changes between the first conductor 211 with a high input level and the plurality of second conductors 221, thereby outputting position information of the first conductor 211 with a high input level and the second conductor 221 where the electrical signal changes.

[0102] When determining whether the acquired power conversion signal has changed, the acquired electrical signal at the point is compared with a previously acquired reference value of the electrical signal at the point in an uncompressed state. For example, if the change exceeds 5% of the reference value, the point is determined to be compressed, and information indicating that the detected point has been compressed is output. Alternatively, the point may be determined to be compressed when the change exceeds 1%, 2%, 3%, 4%, 6%, 10%, or other values ​​of the reference value, and this disclosure is not limited thereto.

[0103] As shown in FIG13 , the detection module includes: multiple acquisition terminal circuits, each of which is connected to a plurality of second conductive wires 221 in a one-to-one correspondence; the acquisition terminal circuit includes a first selection switch 240, which includes a throw terminal, a first terminal, and a second terminal. The throw terminal is connected to the second conductive wire 221, the first terminal being configured to connect to the sampling circuit, and the second terminal being grounded. The first selection switch 240 controls the throw terminal to connect the throw terminal to either the first terminal or the second terminal. During a detection cycle, the throw terminal is connected to the first terminal, thereby connecting the sampling circuit to the second conductive wire 221, thereby enabling sampling of the second conductive wire 221. By connecting the throw terminal to the second terminal, the second conductive wire 221 is connected to the ground segment, thereby discharging any residual power in the circuit and waiting for the next sampling cycle.

[0104] In one embodiment, as shown in FIG13 , the acquisition end circuit further includes: a sampling and holding capacitor C, wherein the first electrode of the sampling and holding capacitor C is connected to the second wire 221 and the throw terminal, and the second electrode of the sampling and holding capacitor C is grounded. The sampling and holding capacitor C is used to achieve a voltage stabilization effect, so that the pressure on the wire can be stabilized at the target voltage during detection, thereby improving the accuracy of the detection result. In addition, a discharge circuit is formed by connecting the throw terminal to the second terminal; in a detection cycle, the throw terminal of the first selection switch is first connected to the second terminal, and the sampling and holding capacitor C is discharged for a preset time, and the preset time can be set according to the size of the holding capacitor and the parasitic capacitance; after the sampling and holding capacitor C is discharged, a high level is input to one of the multiple first wires 211, and a low level is input to the remaining first wires 211.

[0105] As shown in FIG13 , the acquisition circuit further includes a sampling resistor R0, a first end of which is connected to the second wire 221 and the throw terminal, and a second end of which is grounded. By providing the sampling resistor R0, the sampling circuit acquires the voltage across the sampling resistor R0 during sampling. The change in the voltage across the sampling resistor R0 can be used to determine the change in resistance between the first wire 211 and the second wire 221, thereby determining whether the corresponding locations of the first wire 211 and the second wire 221 being tested are being squeezed.

[0106] The smart sensing mat provided by the present disclosure can be a yoga mat, a dance mat, etc. for users to exercise. When users exercise on the smart fitness mat, their relevant movement standards can be determined by locating the force position on the smart fitness mat, and then comparing the located force position with the reference position to assist the user in judging the accuracy of the current position.

[0107] The smart sensing pad provided by the present disclosure can also be a mattress. When a user rests and sleeps on the mattress, the smart sensing mattress can be used to locate the force position of the mattress, and then the located force position can be analyzed to obtain the user's sleeping condition.

[0108] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0109] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A smart mat, comprising: a first surface layer and a second surface layer, wherein the first surface layer and the second surface layer are arranged opposite to each other; A pressure-variable sensing layer, the pressure-variable sensing layer is located between the first surface layer and the second surface layer; the pressure-variable sensing layer includes a first electrode layer, a conductive layer and a second electrode layer stacked in sequence; the first electrode layer includes a plurality of first conductive wires extending along a first direction and spaced apart, the second electrode layer includes a plurality of second conductive wires extending along a second direction and spaced apart, the first direction intersects the second direction; the conductive layer includes a plurality of conductive strips extending along the first direction and spaced apart, the plurality of conductive strips are arranged one-to-one with the plurality of first conductive wires; A detection module, wherein the detection module is connected to the plurality of first wires and the plurality of second wires respectively; the detection module inputs detection signals to the plurality of first wires one by one and obtains electrical signals in the plurality of second wires, thereby outputting position signals of the first wires and the second wires whose electrical signals have changed.

2. The smart mat according to claim 1, wherein: The detection module inputs detection signals to the plurality of first wires one by one, including: In one detection cycle, the detection module inputs a high level to the multiple first wires one by one, and inputs a low level to the first wires other than the first wires to which the high level is input among the multiple first wires.

3. The smart mat according to claim 1, wherein: The detection module comprises: A plurality of acquisition end circuits are connected to the plurality of second wires in a one-to-one correspondence; the acquisition end circuit comprises a first selection switch, the first selection switch comprises a throw terminal, a first wiring terminal and a second wiring terminal, the throw terminal is connected to the second wire, the first wiring terminal is configured to connect to a sampling circuit, and the second wiring terminal is grounded.

4. The smart mat according to claim 3, wherein: The acquisition end circuit further includes: a sampling and holding capacitor, a first electrode of the sampling and holding capacitor is connected to the second wire and the throw end, and a second electrode of the sampling and holding capacitor is grounded.

5. The smart mat according to claim 3, wherein: The acquisition end circuit further includes: a sampling resistor, a first end of the sampling resistor is connected to the second wire and the throw end, and a second end of the sampling resistor is grounded.

6. The smart mat according to claim 1, wherein: The detection module also includes: A plurality of second selection switches are connected one-to-one with the plurality of first wires, the second selection switches include a throw terminal, a first connection terminal and a second connection terminal, the throw terminal is connected with the first wire, the first connection terminal is configured to connect to a drive circuit, and the second connection terminal is grounded.

7. The smart mat according to claim 1, wherein: The smart mat also includes: A communication module, wherein the communication module is connected to the detection module, and the communication module is configured to transmit the detection data acquired by the detection module to a target terminal.

8. The smart mat according to claim 1, wherein: The length of the first conductive line along the first direction is greater than the length of the second conductive line along the second direction.

9. The smart mat according to claim 1, wherein: The number of the conductive strips is the same as the number of the first conductive wires.

10. The smart mat according to claim 1, wherein: The conductive layer is a conductive carbon film, and the conductive carbon film is separated to form a plurality of conductive carbon strips as the plurality of conductive strips.

11. A multi-point detection method for a smart mat, wherein: include: A smart mat is provided, the smart mat comprising a first surface layer, a second surface layer, a pressure-variable sensing layer and a detection module, the first surface layer and the second surface layer are arranged opposite to each other, the pressure-variable sensing layer is located between the first surface layer and the second surface layer; the pressure-variable sensing layer comprises a first electrode layer, a conductive layer and a second electrode layer which are stacked in sequence; the first electrode layer comprises a plurality of first conductive wires extending along a first direction and arranged at intervals, the second electrode layer comprises a plurality of second conductive wires extending along a second direction and arranged at intervals, the first direction intersects with the second direction; the conductive layer comprises a plurality of conductive strips extending along a first direction and arranged at intervals, the plurality of conductive strips are arranged in one-to-one correspondence with the plurality of first conductive wires; the detection module is connected to the plurality of first conductive wires and the plurality of second conductive wires respectively; Acquiring, by the detection module, standard electrical signals of a plurality of detection points formed between the plurality of first conductive wires and the plurality of second conductive wires when the smart mat is in a non-squeezed state; In one detection cycle, a detection signal is input to one of the plurality of first wires through the detection module; the second wire whose electrical signal changes between the first wire to which the detection signal is input and the plurality of second wires is obtained through the detection module; If the difference between the electrical signal at the detection point formed between the plurality of second wires and the first wire for inputting the detection signal and the corresponding standard electrical signal is greater than a preset value, it is determined that the electrical signal has changed; Entering the next detection cycle, the steps of the previous detection cycle are repeated until all the first wires are input with detection signals in sequence for detection.

12. The multi-point detection method according to claim 11, wherein: In one detection cycle, the detection module is discharged for a preset time, and then a high level is input to a target first wire among the plurality of first wires.

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