Smart mat and multi-point detection method thereof

Abstract

This disclosure provides a smart pad and a multi-point detection method for the smart pad. The smart pad includes: a first surface layer, a second surface layer, a pressure transducer layer, and a detection module. The pressure transducer layer is located between the first surface layer and the second surface layer. The pressure transducer layer includes a first electrode layer, a conductive layer, and a second electrode layer. The first electrode layer includes multiple first wires extending along a first direction and spaced apart. The second electrode layer includes multiple second wires extending along a second direction and spaced apart. The conductive layer includes multiple conductive strips extending along the first direction and spaced apart. The multiple conductive strips correspond one-to-one with the multiple first wires. The detection module is connected to the multiple first wires and the multiple second wires respectively. The detection module inputs detection signals to the multiple first wires one by one and acquires the electrical signals in the multiple second wires, thereby outputting the first wires and second wires among the multiple first wires and the multiple second wires whose electrical signals change.

Description

Technical Field

[0001] This disclosure relates to the field of smart pad technology, and more specifically, to a smart pad and a multi-point detection method for smart pads. Background Technology

[0002] As people's living standards continue to improve, more and more people are paying attention to physical exercise, such as using fitness mats (yoga mats, dance mats) for exercise. However, due to insufficient mastery of the relevant movements, it is easy for practitioners to perform the movements incorrectly or even make mistakes. This can cause minor injuries to the muscles or bones, or even serious injuries. For example, due to high work intensity and high pressure, people are paying more and more attention to sleep quality. When resting and sleeping on a mattress, it is necessary to understand one's own sleep quality.

[0003] To guide users in maintaining proper form when exercising with a smart fitness mat, the pressure points on the mat can be located and compared with reference points to help users judge the accuracy of their current position. Alternatively, to sense the body's position on a mattress, the pressure points on a smart sensor mattress can be located and analyzed to understand the user's sleep patterns. Therefore, there is an urgent need for a smart sensor mat with positioning capabilities and high accuracy.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to provide a method for multi-point detection of smart pads, which improves the positioning accuracy of smart pads.

[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0007] According to one aspect of this disclosure, a smart pad is provided, the smart pad comprising:

[0008] A first surface layer and a second surface layer, wherein the first surface layer and the second surface layer are disposed opposite to each other;

[0009] A voltage transformer sensing layer is located between a first surface layer and a second surface layer. The voltage transformer sensing layer includes a first electrode layer, a conductive layer, and a second electrode layer stacked sequentially. The first electrode layer includes a plurality of first wires extending along a first direction and spaced apart. The second electrode layer includes a plurality of second wires extending along a second direction and spaced apart. The first direction and the second direction intersect. The conductive layer includes a plurality of conductive strips extending along the first direction and spaced apart. The plurality of conductive strips correspond one-to-one with the plurality of first wires.

[0010] 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 acquires the electrical signals in the plurality of second wires, thereby outputting position signals of the first wires and second wires where the electrical signals between the plurality of first wires and the plurality of second wires change.

[0011] In one exemplary embodiment of this disclosure, the detection module inputs detection signals to each of the plurality of first wires sequentially, including:

[0012] Within a 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 the first wires other than the ones into which a high level is input.

[0013] In one exemplary embodiment of this disclosure, the detection module includes:

[0014] Multiple acquisition terminal circuits are connected one-to-one with the multiple second wires; each acquisition terminal circuit includes a first selection switch, which includes a throw terminal, a first terminal and a second terminal. The throw terminal is connected to the second wires, the first terminal is configured to connect to the sampling circuit, and the second terminal is grounded.

[0015] In one exemplary embodiment of this disclosure, the acquisition terminal circuit further includes: a sample-and-hold capacitor, the first terminal of the sample-and-hold capacitor being connected to the second wire and the throw terminal, and the second terminal of the sample-and-hold capacitor being grounded.

[0016] In one exemplary embodiment of this disclosure, the acquisition terminal circuit further includes: a sampling resistor, the first end of which is connected to the second wire and the throw terminal, and the second end of which is grounded.

[0017] In one exemplary embodiment of this disclosure, the detection module further includes:

[0018] Multiple second selection switches are connected one-to-one with the multiple first wires. Each second 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 a drive circuit, and the second terminal is grounded.

[0019] In one exemplary embodiment of this disclosure, the smart pad further includes:

[0020] 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.

[0021] In one exemplary embodiment of this disclosure, the length of the first conductor along the first direction is greater than the length of the second conductor along the second direction.

[0022] In one exemplary embodiment of this disclosure, the number of conductive strips is the same as the number of the first wires.

[0023] In one exemplary embodiment of this disclosure, the conductive layer is a conductive carbon film, and the conductive carbon film is divided into multiple conductive carbon strips to serve as the multiple conductive strips.

[0024] According to another aspect of this disclosure, a multi-point detection method for a smart pad is provided, the multi-point detection method for the smart pad comprising:

[0025] A smart pad is provided, comprising a first surface layer, a second surface layer, a pressure-sensitive layer, and a detection module. The first surface layer and the second surface layer are disposed opposite to each other, and the pressure-sensitive layer is located between the first surface layer and the second surface layer. The pressure-sensitive layer comprises a first electrode layer, a conductive layer, and a second electrode layer stacked sequentially. The first electrode layer comprises a plurality of first wires extending along a first direction and spaced apart, and the second electrode layer comprises a plurality of second wires extending along a second direction and spaced apart, wherein the first direction and the second direction intersect. The conductive layer comprises a plurality of conductive strips extending along the first direction and spaced apart, and the plurality of conductive strips are disposed one-to-one with the plurality of first wires. The detection module is connected to the plurality of first wires and the plurality of second wires respectively.

[0026] The detection module acquires standard electrical signals at multiple detection points formed between the multiple first wires and the multiple second wires when the smart pad is not compressed.

[0027] In one detection cycle, a detection signal is input to one of the plurality of first conductors through the detection module; the detection module obtains the second conductor among the plurality of second conductors whose electrical signal changes with the first conductor to which the detection signal is input; wherein, if the difference between the electrical signal of the detection point formed between the plurality of second conductors and the first conductor to which the detection signal is input and the corresponding standard electrical signal is greater than a preset value, it is determined that the electrical signal has changed;

[0028] Enter the next detection cycle and repeat the steps of the previous detection cycle until all the first wires are sequentially input with detection signals for detection.

[0029] In one exemplary embodiment of this disclosure, after a preset time for the detection module to be depleted during a detection cycle, a detection signal is then input to one of the plurality of first wires through the detection module.

[0030] The smart mat disclosed herein includes a pressure sensing layer located between a first surface layer and a second surface layer, which together protect the pressure sensing layer. In the direction from the first surface layer to the second surface layer, the pressure sensing layer includes a first electrode layer, a conductive layer, and a second electrode layer stacked sequentially. The first electrode layer includes multiple first wires extending along a first direction and spaced apart, and the second electrode layer includes multiple second wires extending along a second direction and spaced apart. By aligning the multiple conductive strips with the multiple first wires one-to-one, when the first wire corresponding to a pressure point on the mat is subjected to pressure, the pressure exerted on the corresponding conductive strip below it by the first and second wires changes. The contact area between the conductive strip and the first and second wires increases, thereby changing the resistance and reducing the resistance between the first and second wires. The detection module is connected to multiple first and second wires respectively. The detection module inputs detection signals to each of the multiple first wires and acquires electrical signals from the multiple second wires, thereby outputting the position signals of the first and second wires whose resistance changes. By determining the position of the first and second wires whose resistance changes, the pressure position of the exercise mat can be identified, and the pressure position can be fed back to the user for reference, thereby identifying the human stepping position and helping to judge whether the exercise movement is standard.

[0031] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0033] Figure 1 This is a schematic diagram of a smart pad provided for one embodiment of the present disclosure.

[0034] Figure 2 An exploded view of a smart pad provided for one embodiment of this disclosure.

[0035] Figure 3 An exploded view of a pressure transformer induction layer provided in one embodiment of this disclosure.

[0036] Figure 4 This is a schematic diagram of a first electrode layer provided in one embodiment of the present disclosure.

[0037] Figure 5 This is a schematic diagram of a second electrode layer provided in one embodiment of the present disclosure.

[0038] Figure 6 This is a schematic diagram of a conductive layer provided in one embodiment of the present disclosure.

[0039] Figure 7 This is a schematic diagram of the equivalent circuit of the conductive layer provided in this disclosure.

[0040] Figure 8 This is a schematic diagram of the equivalent circuit between the first and second conductors and the conductive layer provided in this disclosure.

[0041] Figure 9 This is a schematic diagram of the equivalent circuit of the first electrode layer provided in this disclosure.

[0042] Figure 10 This is a schematic diagram of the equivalent circuit of the first electrode layer provided in one embodiment of the present disclosure.

[0043] Figure 11 This is a schematic diagram illustrating a misjudgment in the equivalent circuit of the first and second conductors provided in this disclosure.

[0044] Figure 12 This is a schematic diagram illustrating the elimination of misjudgments in the equivalent circuit of the first and second wires provided in one embodiment of this disclosure.

[0045] Figure 13 This is a schematic diagram of a voltage transformer sensing layer and a sampling circuit provided in one embodiment of this disclosure.

[0046] Figure 14This is a schematic diagram of a second selection switch provided in one embodiment of the present disclosure.

[0047] Explanation of reference numerals in the attached figures:

[0048] 110. First surface layer; 120. Second surface layer;

[0049] 200, Voltage Transformer Induction Layer; 210, First Electrode Layer; 211, First Conductor; 220, Second Electrode Layer; 221, Second Conductor; 230, Conductive Layer; 231, Conductive Strip; 240, First Selector Switch; 250, Second Selector Switch;

[0050] 300. Detection circuit;

[0051] 400. Flexible circuit board cable clip;

[0052] 500. Shell; 510. First shell; 520. Second shell;

[0053] 600. Shade;

[0054] 700, battery. Detailed Implementation

[0055] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary 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 more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0056] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0057] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0058] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily need to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0059] The embodiments of this disclosure first provide a smart pad, such as Figures 1-6 As shown, the smart pad includes: a first surface layer 110, a second surface layer 120, a pressure transducer layer 200, and a detection module. The first surface layer 110 and the second surface layer 120 are disposed opposite to each other, and the pressure transducer layer 200 is located between the first surface layer 110 and the second surface layer 120. The pressure transducer layer 200 includes a first electrode layer 210, a conductive layer 230, and a second electrode layer 220 stacked sequentially. 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 211 extending along a second direction Y and spaced apart. Line 221 intersects in a first direction X and a second direction Y; conductive layer 230 includes multiple conductive strips 231 extending along the first direction X and spaced apart, with each conductive strip 231 corresponding to a multiple first wire 211; a detection module is connected to the multiple first wires 211 and the multiple second wires 221 respectively; the detection module inputs detection signals to each of the multiple first wires 211 and acquires electrical signals in the multiple second wires 221, thereby outputting the first wire 211 and the second wire 221 where the electrical signals between the multiple first wires 211 and the multiple second wires 221 change. The electrical signals can be at least one of resistance, voltage, and current.

[0060] The smart mat disclosed herein includes a pressure sensing layer 200 located between a first surface layer 110 and a second surface layer 120, which together protect the pressure sensing layer 200. In the direction from the first surface layer 110 to the second surface layer 120, the pressure sensing layer 200 includes a first electrode layer 210, a conductive layer 230, and a second electrode layer 220 stacked sequentially. The first electrode layer 210 includes multiple first conductive lines 211 extending along a first direction X and spaced apart, and the second electrode layer 220 includes multiple second conductive lines 221 extending along a second direction Y and spaced apart. By arranging multiple conductive strips 231 in a one-to-one correspondence with multiple first conductive lines 211, when the first conductive line 211 corresponding to a pressure point on the mat is subjected to pressure, the corresponding conductive strip 231 below it experiences increased pressure from the first conductive line 211 and the second conductive line 221, thus increasing the pressure on the conductive strip 231. The contact area between the electric strip 231 and the first wire 211 and the second wire 221 increases, thereby changing the resistance and reducing the resistance between the first wire 211 and the second wire 221. The detection module is connected to multiple first wires 211 and multiple second wires 221 respectively. The detection module inputs detection signals to each of the multiple first wires 211 and acquires the electrical signals in the multiple second wires 221. It compares the acquired electrical signals with the standard electrical signals acquired at the corresponding detection points when the exercise mat is not compressed, and outputs the first wire 211 and the second wire 221 whose resistance changes among the multiple first wires 211 and the multiple second wires 221. The position of the first wire 211 and the second wire 221 whose electrical signals change determines the pressure position of the exercise mat, and feeds the pressure position back to the user for reference, thereby identifying the human stepping position and helping to judge whether the exercise movement is standard.

[0061] Specifically, such as Figures 3-5 As shown, the length of the first conductor 211 along the first direction X is greater than the length of the second conductor 221 along the second direction Y. Since the dimensions of the first electrode layer 210 and the second electrode layer 220 along the first direction X and the second direction Y are the same, that is, the length of the first conductor 211 is equivalent to the length of the second electrode layer 220, and the length of the second conductor 221 is equivalent to the width of the first electrode layer 210, the number of second conductors 221 is greater than the number of first conductors 211.

[0062] In this configuration, the first direction X is perpendicular to the second direction Y, meaning that the first electrode layer 210 and the second electrode layer 220 form a rectangle, and the voltage transformer sensing layer 200 formed by the first electrode layer 210 and the second electrode layer 220 forms a rectangle. 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 impose any restrictions on this.

[0063] 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 together 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 together by means of adhesive bonding, sewing, weaving, etc., and this disclosure does not impose any limitations on this method.

[0064] The voltage transformer sensing 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 for the first surface layer 110 and the second surface layer 120 have good deformation and self-recovery capabilities, so that they can undergo elastic deformation when an external force is applied and can return to their original shape after the external force is removed. This allows the first electrode layer 210 and the second electrode layer 220 to return to their original shape 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.

[0065] The first electrode layer 210 and the first surface layer 110 can be connected by bonding, sewing or other means, and the second electrode layer 220 and the second surface layer 120 can be connected by bonding, sewing or other means.

[0066] In one embodiment, the exercise mat further includes insulating layers. An insulating layer is present between the first electrode layer 210 and the first surface layer 110, and an insulating layer is present between the second electrode layer 220 and the second surface layer 120. The insulating layers provide insulation to prevent electric shock to the user due to leakage from the voltage transformer sensing layer 200. Alternatively, both the first surface layer 110 and the second surface layer 120 can be directly supported by insulating materials to achieve the same insulation performance.

[0067] In one embodiment, such as Figure 3 As shown, the first electrode layer 210, the conductive layer 230, and the second electrode layer 220 are stacked together in sequence, making the opposite sides of the first electrode layer 210, the second electrode layer 220, and the conductive layer 230 electrically connected. The first electrode layer 210, the conductive layer 230, and the second electrode layer 220 can be stacked sequentially and then sewn together to form a whole.

[0068] Among them, such as Figure 4As shown, the first electrode layer 210 includes a first substrate and a plurality of first conductive lines 211. The plurality of first conductive lines 211 are located on the first substrate. The first substrate may be, for example, a non-woven fabric, and the first conductive lines 211 may be, for example, aluminum foil or copper foil, to improve the conductivity of the first conductive lines 211 and reduce their internal resistance. Of course, the plurality of first conductive lines 211 may also be, for example, a printed conductive layer containing carbon powder. The plurality of first conductive lines 211 may be pre-formed on the first substrate by printing, or the plurality of first conductive lines 211 may be bonded to the first substrate by double-sided adhesive.

[0069] Among them, such as Figure 5 As shown, the second electrode layer 220 includes a second substrate and a plurality of second conductive lines 221. The plurality of second conductive lines 221 are located on the second substrate. The second substrate may be, for example, non-woven fabric, and the second conductive lines 221 may be, for example, aluminum foil or copper foil, to improve the conductivity of the second conductive lines 221 and reduce their internal resistance. Of course, the plurality of second conductive lines 221 may also be, for example, a printed conductive layer containing carbon powder. The plurality of second conductive lines 221 may be pre-formed on the second substrate by printing, or the plurality of second conductive lines 221 may be bonded to the second substrate by double-sided adhesive.

[0070] In one embodiment, such as Figure 6 As shown, the conductive layer 230 can be made of conductive carbon film, i.e., multiple conductive strips 231 are strip-shaped carbon films. When compressed, the contact area between the strip-shaped carbon film and the first wire 211 and the second wire 221 increases, resulting in a significant change in the resistance between the strip-shaped carbon film and the first and second wires 211 and 221 under pressure. This alters the resistance between the corresponding first wire 211 and second wire 221 when compressed. The conductive carbon film is relatively thin, so its use in a fitness mat does not affect the overall thickness of the mat, nor does it create noticeable bumps, thus improving the user experience.

[0071] Specifically, such as Figure 7 As shown, since the conductive carbon film itself is also a conductor, any potential change at any point during matrix sampling will inevitably affect the entire conductive carbon film. The change in resistance of the conductive carbon film due to pressure alters the area of ​​the contact resistance along the thickness direction of the smart pad, thus changing the magnitude of the resistance. That is, the resistance at a certain point can be considered as the sum of the upper and lower contact resistances of the conductive carbon film, as shown in the diagram. Figure 8 The sum of R1 and R2 shown shows that this change in magnitude is independent of deformation and is positively correlated only with the size of the contact area affected by the change in force. Figure 7 L1, L2, L3, and L4 are multiple first wires arranged sequentially, and R1, R2, and R3 are multiple second wires arranged sequentially. R is the equivalent resistance of the conductive layer 230 between the first wire 211 and the second wire 221. Figure 8 R10 and R20 in the figure represent the contact resistance of the conductive layer 230 between the first conductor 211 and the second conductor 221.

[0072] like Figure 8 As shown in the equivalent circuit of the conductive carbon film, when energized in the column and observed in the row, the observed resistance R is increased due to the conductivity resistance R of the conductive carbon film. 总 =R1+R', where R' is the parallel value of the contact resistance R2 and the equivalent resistance on the same plane. Under the condition that R>>R2, R'=R2 / n, R is the average resistance of the conductive carbon film per column. However, the resistance value of R is negatively correlated with the length of the first wire 211. It is difficult to achieve R>>R2. Therefore, R'=R2 / n (n is the number of second wires) does not hold true in reality. The value of R' is related to the length of the first wire 211, the conductivity coefficient of the conductive carbon film, and the tightness between the conductive carbon film and the second electrode layer 220 during manufacturing, i.e., R2.

[0073] Figure 9 The diagram shows the equivalent circuit for the same row. It can be seen that when the conductive carbon film is compressed within the same row, the contact resistance R1X becomes very small. Due to the presence 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 will be affected by the compression point, thus causing misjudgment. Furthermore, because the contact area varies with the manufacturing process, the contact resistance at different points is not fixed. Therefore, the point observed in the same row is actually the minimum observable value for that row, which can cause some areas to be insensitive to pressure. Here, R1X (X = 1~5) and R2X (X = 1~5) are the contact resistances between the first wire 211 and the second wire 221.

[0074] like Figure 10 As shown, this disclosure divides the carbon film into several independent strip-shaped carbon films. The detected resistance R = R1 + R2 can eliminate interference between the horizontal columns, thus ensuring that the potential will not crosstalk between the left and right sides when the first wire 211 is energized sequentially. This avoids misjudgment caused by the un-squeezed point being affected by the squeezed point during sampling.

[0075] In one embodiment, the conductive carbon film may include a plastic film and conductive carbon powder uniformly distributed in the plastic film. The resistance of the conductive carbon film can be adjusted by regulating the proportion of carbon powder; the higher the carbon powder content, the stronger the conductivity and the lower the resistance of the conductive carbon film. In other words, the resistance of the conductive carbon film is related to the contact area between the first wire 211, the second wire 221, and the conductive carbon film, as well as the carbon powder content in the conductive carbon film. A larger contact area between the first wire 211, the second wire 221, and the conductive carbon film results in a lower resistance, and a higher carbon powder content in the conductive carbon film also results in a lower resistance.

[0076] Because the resistance change between the conductive carbon film and the first electrode layer 210 and the second electrode layer 220 differs from that of easily creeping materials such as fabrics, the change in the carbon film resistance caused by extrusion is small. The resistance change primarily occurs through variations in the contact area between the upper and lower conductive metal layers and the carbon film. Furthermore, the manufacturing process of the conductive carbon film itself means that the surface carbon powder cannot be completely uniformly distributed. Therefore, the resistance consistency of the conductive carbon film is poor, making a standardized judgment method unsuitable for such inconsistent conditions. This disclosure utilizes a detection circuit to acquire electrical signals at multiple detection points formed between multiple first conductors 211 and multiple second conductors 221. These acquired electrical signals at each detection point are used as reference standard electrical signals. In subsequent detection processes, the acquired electrical signals at each detection point are compared with the pre-acquired standard electrical signals. Changes in the electrical signals are used to determine whether the point is under pressure or compression. By comparing each detection point with itself, the discrepancy in electrical signals at each detection point due to the manufacturing process of the conductive carbon film itself, which may result in imperfectly uniform distribution of surface carbon powder, leads to misjudgments and improves detection accuracy.

[0077] like Figure 11 As shown in the figure, the circled points are the actual compression points. During the scanning process, L1 is energized. Because the compression resistance of points (L3, R3), (L2, R3), (L2, R1), and (L1, R3) decreases, the observation point (L1, R1) will be judged as being compressed due to the presence of a high level. This will cause non-compression points to be affected by the compression points and result in misjudgments.

[0078] like Figure 2 As shown, the detection module includes a detection circuit 300. The detection circuit 300 periodically inputs a detection signal to the first wire 211 in the first electrode layer 210 and samples the second wire 221 to determine the position of the first wire 211 and the second wire 221 with reduced resistance among the multiple first wires 211 and multiple second wires 221.

[0079] Specifically, within a detection cycle, a high-level signal is sequentially input to each of the multiple first wires 211 via the detection module, while a low-level signal is input to the first wires 211 other than those inputting a high-level signal. Then, a sampling circuit determines whether there are any wires 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 with the high-level signal and the second wire 221 where reduced resistance was detected are under pressure. If not, it is determined that the position corresponding to the first wire 211 with the high-level signal is not under pressure. This process is repeated until all first wires 211 have been sequentially input with a high-level signal for detection. After all first wires 211 have been sequentially input with a high-level signal for detection, one detection cycle is completed. After completing one detection cycle, the detection module outputs the pressure position information. Then, the next detection cycle begins, and this cycle repeats, enabling the smart pad to monitor and provide feedback on the pressure position in real time during use.

[0080] like Figure 11 As shown, the detection module inputs a high level to each of the multiple first wires 211 one by one, and inputs a low level to the first wires 211 other than the first wires 211 that input a high level. At this time, since point (L2, R1) is connected to a low level, the level on row R1 will also be a low level, which is judged as not being squeezed.

[0081] In one embodiment, such as Figure 13 As shown, the detection module includes: multiple acquisition terminal circuits, each connected to a corresponding number of second wires 221; each 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 wires 221, the first terminal is configured to connect to the sampling circuit, and the second terminal is grounded. The first selection switch 240 controls the throw terminal to connect to either the first or second terminal. Within one detection cycle, when the throw terminal is connected to the first terminal, the sampling circuit is connected to the second wires 221, enabling sampling of the second wires 221; when the throw terminal is connected to the second terminal, the second wires 221 are connected to the ground, discharging any residual charge in the circuit and preparing for the next sampling cycle.

[0082] Among them, such as Figure 13As shown, the acquisition circuit also includes a sample-and-hold capacitor C. The first terminal of the sample-and-hold capacitor C is connected to the second wire 221 and the throw terminal, and the second terminal of the sample-and-hold capacitor C is grounded. The sample-and-hold capacitor C provides voltage stabilization, ensuring that the pressure on the wire remains stable at the target voltage during detection, thereby improving the accuracy of the detection results. Furthermore, by connecting the throw terminal to the second terminal, a discharge circuit is formed, which discharges the sample-and-hold capacitor C until the next sampling cycle. The discharge time can be set according to the size of the holding capacitor and the parasitic capacitance.

[0083] Among them, such as Figure 13 As shown, the acquisition circuit also includes a sampling resistor R0. The first end of the sampling resistor R0 is connected to the second wire 221 and the throw terminal, and the second end of the sampling resistor R0 is grounded. By setting the sampling resistor R0, the sampling circuit obtains the voltage of the sampling resistor R0 during sampling. The change in voltage of 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 positions corresponding to the detected first wire 211 and second wire 221 are being compressed.

[0084] In one embodiment, such as Figure 14 As shown, the detection module also includes: multiple second selection switches 250, which are connected one-to-one with multiple first wires 211. Each second selection switch 250 includes a throw terminal, a first terminal and a second terminal. The throw terminal is connected to the second wire 221, the first terminal is configured to connect to the drive circuit, and the second terminal is grounded.

[0085] Within a detection cycle, a high-level signal is sequentially input to each of the multiple first wires 211 via the detection module. One of the first wires 211 is connected to the first terminal of a second selector switch 250, resulting in a high-level signal (VCC) input to that first wire 211. The remaining first wires 211 are connected to the second terminal of a second selector switch 250, resulting in a low-level signal input to the remaining first wires 211. By controlling the second selector switches 250 connected to the multiple wires one by one, a high-level signal is sequentially input to each of the multiple first wires 211 for detection.

[0086] In one embodiment, the smart pad further includes a communication module connected to the detection module, the communication module being configured to transmit detection data acquired by the detection module to a target terminal.

[0087] Specifically, the data collected by the detection circuit is quantified and then communicated wirelessly or via wired means with a mobile phone or other electronic terminal to provide feedback on the user's stepping location information. The communication method can be, for example, Bluetooth, Wi-Fi, 2.4G, or other wireless means, or Ethernet, USB, or other wired means; this disclosure does not impose any limitations on this.

[0088] In one embodiment, such as Figure 1 and Figure 2 As shown, the smart pad also includes: a housing 500, which is formed by fastening a first housing 510 and a second housing 520 together. The first housing 510 and the second housing 520 are fastened together to form an accommodating space, in which the flexible circuit board cable clip 400 is accommodated. The housing 500 forms protection for the flexible circuit board cable clip 400.

[0089] The housing 500 also houses a battery 700, which powers the flexible circuit board cable clip 400 and, consequently, the entire detection circuit 300. The battery 700 can be a removable secondary battery for easy replacement and charging; alternatively, it can be a non-removable secondary battery that is charged via a charging interface.

[0090] The housing 500 has a viewing window, and the flexible circuit board cable clip 400 has an indicator light. The light signal of the indicator light can be observed through the viewing window. A light shield 600 is detachably or openably mounted on the viewing window to facilitate observation of the indicator light signal; the light shield 600 also prevents the indicator light signal from affecting the user's vision for extended periods. The light signal may be a battery power signal of the battery 700, a signal indicating whether the circuit board is working properly, etc., and this disclosure does not limit this.

[0091] Embodiments of this disclosure also provide a multi-point detection method for a smart pad, the multi-point detection method for a smart pad including:

[0092] Step S100: Provide the smart pad provided in the above embodiments;

[0093] Step S200: Obtain the standard electrical signal of the detection point formed between the multiple first wires and the multiple second wires when the smart pad is not compressed by the detection module;

[0094] In one detection cycle, step S310 involves inputting a detection signal to one of the multiple first wires through the detection module; step S320 involves obtaining, through the detection module, the second wire among the multiple second wires whose electrical signal changes with the first wire to which the detection signal was input.

[0095] Enter the next detection cycle and repeat the steps of the previous detection cycle (steps S310 and S320) until all the first wires are sequentially input with detection signals for detection.

[0096] Specifically, the smart pad 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 disposed 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 sequentially. The first electrode layer 210 includes a plurality of first conductive lines 211 extending along a first direction X and spaced apart, and the second electrode layer 220 includes a plurality of second conductive lines 221 extending along a second direction Y and spaced apart, wherein 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, with each conductive strip 231 corresponding to one of 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 pad, please refer to the detailed description in the above-described smart pad implementation, which will not be repeated here.

[0097] Specifically, in step S200, before the detection, the exercise mat is kept in a non-compressed state at all locations; then, the electrical signals of multiple detection points formed between multiple first wires 211 and multiple second wires 221 are acquired by the detection circuit, and the acquired electrical signals of each detection point between the multiple first wires 211 and multiple second wires 221 are used as reference standard electrical signals. The electrical signal can be at least one of resistance, voltage, and current.

[0098] Specifically, in step S310, a detection signal is input to one of the multiple first wires 211 through the detection module, and a low level is input to the first wires 211 other than the first wires 211 that input a high level.

[0099] Among them, such as Figure 14As shown, the detection module further includes: multiple second selection switches 250, each of which is connected to a corresponding first wire 211. Each second selection switch 250 includes a throw terminal, a first terminal, and a second terminal. The throw terminal is connected to a second wire 221, the first terminal is configured to connect to a drive circuit, and the second terminal is grounded. During one detection cycle, when a high level is input sequentially to each of the first wires 211 through the detection module, the throw terminal of the second selection switch 250 connected to one of the first wires 211 is connected to the first terminal, resulting in a high level (VCC) input to that first wire 211. The throw terminals of the second selection switches 250 connected to the remaining first wires 211 are connected to the second terminals, resulting in a low level input to the remaining first wires 211. By controlling the second selection switches 250 connected to the multiple wires one by one, a high level can be input sequentially to each of the multiple first wires 211 for detection.

[0100] Specifically, in step S320, the detection circuit 300 of the detection module samples multiple second wires 221 to determine the second wire 221 among the multiple second wires 221 whose electrical signal changes between the first wire 211 with a high input level and the second wire 221 with a change in electrical signal, thereby outputting the position information of the first wire 211 with a high input level and the second wire 221 whose electrical signal changes.

[0101] When determining whether the acquired transformer signal has changed, the acquired electrical signal at that point is compared with a pre-acquired reference value of the electrical signal at that point in its uncompressed state. For example, if the change exceeds 5% of the reference value, it can be determined that the point has been compressed, and the compression information of the detected point is output. Of course, compression can also be determined when the change exceeds 1%, 2%, 3%, 4%, 6%, 10%, etc. of the reference value; this disclosure does not impose any limitations on this.

[0102] Among them, such as Figure 13 As shown, the detection module includes: multiple acquisition terminal circuits, each connected to a corresponding number of second wires 221; each 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 wires 221, the first terminal is configured to connect to the sampling circuit, and the second terminal is grounded. The first selection switch 240 controls the throw terminal to connect to either the first or second terminal. Within one detection cycle, when the throw terminal is connected to the first terminal, the sampling circuit is connected to the second wires 221, enabling sampling of the second wires 221; when the throw terminal is connected to the second terminal, the second wires 221 are connected to the ground, discharging any residual charge in the circuit and preparing for the next sampling cycle.

[0103] In one embodiment, such as Figure 13 As shown, the acquisition terminal circuit also includes a sample-and-hold capacitor C. The first terminal of the sample-and-hold capacitor C is connected to the second wire 221 and the throw terminal, and the second terminal of the sample-and-hold capacitor C is grounded. The sample-and-hold capacitor C achieves voltage stabilization, ensuring that the pressure on the wire is stabilized at the target voltage during detection, thereby improving the accuracy of the detection results. In addition, a discharge circuit is formed by connecting the throw terminal and the second terminal. In one detection cycle, the throw terminal of the first selection switch is first connected to the second terminal to discharge the sample-and-hold capacitor C for a preset time. The preset time can be set according to the size of the holding capacitor and the parasitic capacitance. After discharging the sample-and-hold capacitor C, 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.

[0104] Among them, such as Figure 13 As shown, the acquisition circuit also includes a sampling resistor R0. The first end of the sampling resistor R0 is connected to the second wire 221 and the throw terminal, and the second end of the sampling resistor R0 is grounded. By setting the sampling resistor R0, the sampling circuit obtains the voltage of the sampling resistor R0 during sampling. The change in voltage of 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 positions corresponding to the detected first wire 211 and second wire 221 are being compressed.

[0105] The smart sensor mat provided in this disclosure can be a yoga mat, dance mat, etc., for users to exercise. When users exercise with the smart fitness mat, their relevant movement standards can be determined by locating the force-bearing position on the smart fitness mat, and then comparing the located force-bearing position with the reference position to help users judge the accuracy of their current position.

[0106] The smart sensor pad disclosed herein can also be a mattress. When a user rests or sleeps on the mattress, the smart sensor mattress can locate the pressure points on the mattress and then analyze the located pressure points to obtain information about the user's sleep.

[0107] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0108] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A smart mat, characterized in that, include: A first surface layer and a second surface layer, wherein the first surface layer and the second surface layer are disposed opposite to each other; A voltage transformer sensing layer is located between a first surface layer and a second surface layer. The voltage transformer sensing layer includes a first electrode layer, a conductive layer, and a second electrode layer stacked sequentially. The first electrode layer includes a plurality of first wires extending along a first direction and spaced apart. The second electrode layer includes a plurality of second wires extending along a second direction and spaced apart. The first direction and the second direction intersect. The conductive layer includes a plurality of conductive strips extending along the first direction and spaced apart. The plurality of conductive strips correspond one-to-one with the plurality of first wires. 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 acquires the electrical signals in the plurality of second wires, thereby outputting position signals of the first wires and second wires whose electrical signals change; The conductive layer is a conductive carbon film, and the conductive carbon film is divided into multiple conductive carbon strips to serve as the multiple conductive strips.

2. The smart pad according to claim 1, characterized in that, The detection module inputs detection signals to each of the plurality of first conductors one by one, including: Within a 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 the first wires other than the ones into which a high level is input.

3. The smart pad according to claim 1, characterized in that, The detection module includes: Multiple acquisition terminal circuits are connected one-to-one with the multiple second wires; each acquisition terminal circuit includes a first selection switch, which includes a throw terminal, a first terminal and a second terminal. The throw terminal is connected to the second wires, the first terminal is configured to connect to the sampling circuit, and the second terminal is grounded.

4. The smart pad according to claim 3, characterized in that, The acquisition terminal circuit further includes a sample-and-hold capacitor, wherein the first terminal of the sample-and-hold capacitor is connected to the second wire and the throw terminal, and the second terminal of the sample-and-hold capacitor is grounded.

5. The smart pad according to claim 3, characterized in that, The acquisition terminal circuit further includes a sampling resistor, the first end of which is connected to the second wire and the throw terminal, and the second end of which is grounded.

6. The smart pad according to claim 1, characterized in that, The detection module also includes: Multiple second selection switches are connected one-to-one with the multiple first wires. Each second selection switch includes a throw terminal, a first terminal and a second terminal. The throw terminal is connected to the first wire, the first terminal is configured to connect to a drive circuit, and the second terminal is grounded.

7. The smart pad according to claim 1, characterized in that, The smart pad also includes: 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.

8. The smart pad according to claim 1, characterized in that, The length of the first conductor along the first direction is greater than the length of the second conductor along the second direction.

9. The smart pad according to claim 1, characterized in that, The number of conductive strips is the same as the number of the first wires.

10. A multi-point detection method for a smart pad, characterized in that, include: A smart pad is provided, comprising a first surface layer, a second surface layer, a pressure-sensitive layer, and a detection module. The first surface layer and the second surface layer are disposed opposite to each other, and the pressure-sensitive layer is located between the first surface layer and the second surface layer. The pressure-sensitive layer comprises a first electrode layer, a conductive layer, and a second electrode layer stacked sequentially. The first electrode layer comprises a plurality of first conductive wires extending along a first direction and spaced apart, and the second electrode layer comprises a plurality of second conductive wires extending along a second direction and spaced apart, wherein the first direction and the second direction intersect. The conductive layer comprises a plurality of conductive strips extending along the first direction and spaced apart, wherein the plurality of conductive strips correspond one-to-one 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. The conductive layer is a conductive carbon film, and the conductive carbon film is divided to form a plurality of conductive carbon strips as the plurality of conductive strips. The detection module acquires standard electrical signals at multiple detection points formed between the multiple first wires and the multiple second wires when the smart pad is not compressed. In one detection cycle, a detection signal is input to one of the plurality of first conductors through the detection module; the detection module obtains the second conductor among the plurality of second conductors whose electrical signal changes with the first conductor to which the detection signal is input; wherein, if the difference between the electrical signal of the detection point formed between the plurality of second conductors and the first conductor to which the detection signal is input and the corresponding standard electrical signal is greater than a preset value, it is determined that the electrical signal has changed; Enter the next detection cycle and repeat the steps of the previous detection cycle until all the first wires are sequentially input with detection signals for detection.

11. The multi-point detection method according to claim 10, characterized in that, During a detection cycle, the detection module is allowed to leak for a preset time, and then a high level is input to one of the target first wires among the multiple first wires.

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