Intelligent pad pressure detection method, detection device and intelligent pad

Abstract

The invention provides a pressure detection method and device for an intelligent pad and the intelligent pad. The method comprises the steps that electric signal values output by all areas of the intelligent pad are collected in real time; carrying out difference processing on the electric signal values collected at different moments in the same area to obtain a difference value; and the difference value is judged, and if the difference value exceeds a preset threshold value, it is judged that the area is pressed. According to the invention, the accuracy of pressure (treading or pressing) detection of the intelligent pad can be improved.

Description

Technical Field

[0001] The present application relates to the field of smart mats, and in particular to a smart mat pressure detection method, a detection device and a smart mat. Background Art

[0002] Existing smart mats (such as yoga mats, dance mats, mattresses, etc.) generally include a main body layer and a pressure sensing device, which is composed of two upper and lower conductive layers and an intermediate pressure-sensitive layer (such as a whole piece of carbon film). The pressure-sensitive layer itself has resistance, and the contact between the pressure-sensitive layer and the conductive layer is determined by collecting the loop resistance from the conductive layer to the pressure-sensitive layer. When the smart mat is under pressure (the user steps on or presses it), the contact area between the pressure-sensitive layer and the conductive layer changes, and the loop resistance from the conductive layer to the pressure-sensitive layer is collected and converted into a voltage value. The voltage value is then used to determine the position of the smart mat that is stepped on or pressed, and the points and times at which the carbon film mat is stepped on or pressed are counted. This existing detection method (patent name "A yoga mat and pressure sensing device", application number 202223285610.X) has the following disadvantages:

[0003] 1. The process of the pressure-sensitive layer, such as the carbon film, is complex. It is particularly difficult and costly to achieve the consistency of resistance in each area of ​​the entire pressure-sensitive layer. If the regional resistance is uneven, the resistance from each area of ​​the conductive layer to the pressure-sensitive layer will be uncertain, making it difficult to judge the pressure of the smart pad;

[0004] 2. Because there are many loops to be collected, a single control module (such as MCU) cannot have so many collection ports. Therefore, it is necessary to switch channel collection through an analog switch IC to reduce the collection ports required by the control module. However, when switching the collection channel, due to the power supply of the pressure sensitive layer, there will be unreleased capacitance in the conductive layer, causing recognition errors and affecting the recognition accuracy. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a smart mat pressure detection method, a detection device and a smart mat, which determine whether the corresponding area of ​​the smart mat is under pressure through difference detection, thereby improving the accuracy of pressure (stepping or pressing) detection of the smart mat.

[0006] The present invention adopts the following technical solution:

[0007] In one aspect, a method for detecting pressure on a smart mat includes:

[0008] Collect the electrical signal values ​​output by each area of ​​the smart mat in real time;

[0009] Performing difference processing on the electrical signal values ​​collected at different times in the same area to obtain the difference;

[0010] The difference is judged, and if the difference exceeds a preset threshold, it is determined that the area is compressed.

[0011] In a preferred embodiment, performing difference processing on the electrical signal values ​​collected at different times in the same area to obtain the difference specifically includes:

[0012] Perform inverse operation on the electrical signal values ​​of the same area at different times, and extract the maximum and minimum inverse values;

[0013] Subtract the maximum reciprocal value from the minimum reciprocal value to obtain the reciprocal difference;

[0014] The difference is judged. If the difference exceeds the preset threshold, it is determined that the area is under pressure, including:

[0015] The reciprocal difference is judged, and if the reciprocal difference exceeds a first preset threshold, it is determined that the area is under pressure.

[0016] In a preferred embodiment, the electrical signal value is a voltage value; the voltage value V output by any region at a certain moment is t It is expressed as follows:

[0017]

[0018] Among them, R1 t It represents the contact resistance of the current collection area loop of the smart mat at a certain moment; R0 represents the parallel resistance from other collection area loops; R2 represents the voltage divider resistance of the current collection area loop of the smart mat; VO represents the DC power supply of the current collection area loop of the smart mat.

[0019] In a preferred solution, the reciprocal maximum value is subtracted from the reciprocal minimum value to obtain the reciprocal difference value. The details are as follows:

[0020]

[0021] Among them, V min Indicates the minimum voltage; V max Indicates the maximum voltage; Indicates the reciprocal maximum value; Indicates the reciprocal minimum value; R1 max Indicates the maximum contact resistance of the current acquisition area loop of the smart mat, R1 min Indicates the minimum contact resistance of the current collection area loop of the smart mat.

[0022] In another preferred embodiment, performing difference processing on the electrical signal values ​​collected at different times in the same area to obtain the difference specifically includes:

[0023] Extract the maximum and minimum electrical signal values ​​of the same area at different times;

[0024] Performing a difference operation on the maximum electrical signal value and the minimum electrical signal value to obtain an electrical signal difference value;

[0025] The difference is judged. If the difference exceeds the preset threshold, it is determined that the area is under pressure, including:

[0026] The electrical signal difference is judged, and if the electrical signal difference exceeds a second preset threshold, it is determined that the area is under pressure.

[0027] In another preferred embodiment, the electrical signal value is a voltage value; the voltage value V output by any region at a certain moment t It is expressed as follows:

[0028]

[0029] Among them, R1 t It represents the contact resistance of the current collection area loop of the smart mat at a certain moment; R0' represents the parallel resistance from other collection area loops, which is a set value greater than or equal to 0; R2 represents the voltage divider resistance of the current collection area loop of the smart mat; VO represents the DC power supply of the current collection area loop of the smart mat.

[0030] In another preferred embodiment, the maximum electrical signal value and the minimum electrical signal value are subjected to a difference operation to obtain an electrical signal difference value V d ', as follows:

[0031]

[0032] Among them, V m ' in Indicates the minimum voltage; V m ' ax Indicates the maximum voltage; R1 max Indicates the maximum contact resistance of the current acquisition area loop of the smart mat, R1 min Indicates the minimum contact resistance of the current collection area loop of the smart mat.

[0033] Preferably, before the real-time acquisition of the electrical signal values ​​outputted by each area of ​​the smart mat, the method further comprises:

[0034] The electrical signal value collection port is set to output mode, and the electrical signal value of the collection port is set to a set value;

[0035] After a preset time, the acquisition port of the electrical signal value is set to input mode;

[0036] Among them, the collection port is the output end of the current collection area loop of the smart mat, and the set value is the DC power supply of the input end of the current collection area loop of the smart mat.

[0037] In another aspect, a smart mat pressure detection device includes:

[0038] The electrical signal value acquisition module is used to collect the electrical signal values ​​output by each area of ​​the smart mat in real time;

[0039] A difference processing module is used to perform difference processing on the electrical signal values ​​collected at different times in the same area to obtain a difference;

[0040] The pressure detection module is used to judge the difference. If the difference exceeds a preset threshold, it is determined that the area is under pressure.

[0041] In a preferred embodiment, the difference processing module is specifically used to perform an inverse operation on the electrical signal values ​​of the same area at different times, extract the inverse maximum value and the inverse minimum value, and perform a difference between the inverse maximum value and the inverse minimum value to obtain the inverse difference value;

[0042] The pressure detection module is specifically used to judge the reciprocal difference, and if the reciprocal difference exceeds a first preset threshold, it is determined that the area is under pressure.

[0043] In another preferred embodiment, the difference processing module is specifically used to extract the maximum electrical signal value and the minimum electrical signal value at different times in the same area, perform a difference operation on the maximum electrical signal value and the minimum electrical signal value, and obtain an electrical signal difference;

[0044] The pressure detection module is specifically used to judge the difference of the electrical signal. If the difference of the electrical signal exceeds a second preset threshold, it is determined that the area is under pressure.

[0045] In another aspect, a smart mat comprises:

[0046] The main body layer is provided with an area for the user to press or step on;

[0047] A sensing device, disposed below or inside the body layer, for sensing the pressure on the area to output different resistance signals or electrical signals;

[0048] The control module is connected to the sensing device and is configured to execute the smart mat pressure detection method and is also configured to convert the resistance signal into an electrical signal when the sensing device outputs a resistance signal.

[0049] The present invention has the following beneficial effects:

[0050] (1) The present invention determines whether the corresponding area of ​​the smart mat is under pressure by difference detection, thereby improving the accuracy of pressure (stepping or pressing) detection of the smart mat, eliminating the problem of uneven resistance value of the pressure sensitive layer, reducing the difficulty of processing the pressure sensitive layer and reducing the production cost of the pressure sensitive layer;

[0051] (2) Due to the particularity of the pressure sensitive layer, after the conductive carbon film is energized, the circuits will affect each other and generate parallel resistance. The existence of parallel resistance will cause great interference to the detection, thereby reducing the accuracy of the detection. In order to eliminate the interference of parallel resistance, the present invention adopts the method of calculating the reciprocal difference of the electrical signal value to eliminate the interference of parallel resistance, thereby further improving the accuracy of the detection;

[0052] (3) Before switching channels for acquisition, the present invention first sets the acquisition port of the electrical signal value to the output mode to discharge the parasitic capacitance of the acquisition loop and quickly charges the filter capacitor of the acquisition loop to full charge. Then, the acquisition port of the electrical signal value is quickly set to the input mode. By utilizing the principle that the voltage across the capacitor cannot change suddenly, the acquisition is performed quickly, thereby reducing the detection error caused by uneven discharge of each loop.

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a flow chart of a method for detecting pressure on a smart mat according to a first embodiment of the present invention;

[0055] Figure 2 is an equivalent circuit diagram of a collection circuit of a sensor device according to Embodiment 1 of the present invention;

[0056] Figure 3 This is a structural mapping diagram of a collection circuit of a sensor device according to Embodiment 1 of the present invention;

[0057] Figure 4 is a detailed flow chart of a method for detecting pressure on a smart mat according to a first embodiment of the present invention;

[0058] Figure 5 is a structural block diagram of a detection device according to Embodiment 1 of the present invention;

[0059] Figure 6 This is a flow chart of a method for detecting pressure on a smart mat according to a second embodiment of the present invention;

[0060] Figure 7 is a detailed flow chart of a method for detecting pressure on a smart mat according to a second embodiment of the present invention;

[0061] Figure 8 This is a structural block diagram of a smart mat according to Embodiment 3 of the present invention;

[0062] Fig. 9 This is a schematic diagram of the structure of a sensor device according to Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0064] In the description of the present invention, it should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0065] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0066] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, step identifiers S101, S102, S103, etc. are only used for convenient expression and do not represent the execution order, and the corresponding execution order can be adjusted.

[0068] Embodiment 1

[0069] See also Figure 1 As shown, the present invention provides a method for detecting pressure on a smart pad, comprising:

[0070] S101, collecting the electrical signal values ​​output by each area of ​​the smart mat in real time;

[0071] S102, performing an inverse operation on the electrical signal values ​​of the same area at different times, and extracting the maximum and minimum inverse values; subtracting the maximum and minimum inverse values ​​to obtain the inverse difference, in order to eliminate the parallel resistance R0 of the loop from other collection areas on the mat;

[0072] S103, judging the reciprocal difference, if the reciprocal difference exceeds a first preset threshold, it is determined that the area is under pressure.

[0073] In this embodiment, an execution subject of a smart pad pressure detection method includes an MCU controller and other devices, and this embodiment is not limited as long as the above method can be executed.

[0074] It should be noted that the area referred to in this embodiment can be an area divided according to the function of the smart mat, or an area divided according to detection needs or an area defined in other ways (it can be an actual physical area or a set virtual area), and it can be restricted according to needs, and this embodiment does not impose any restrictions. In addition, the area can be understood as a sensing area, and the sensing area can be determined by judging the resistance change of the sensing area (such as the deformation of the sensing film in the pressure sensitive layer, resulting in a resistance change, or the change in the contact area between the sensing film and the conductive layer, resulting in a resistance change in the sensing area), or by setting a capacitance sensing device to judge the capacitance change, or by setting a resistance sensing device to judge the resistance change to determine whether it is pressed. The pressure described in this embodiment includes the force applied to the smart mat by pressing, or the force applied to the smart mat by stepping on.

[0075] Specifically, this embodiment takes a sensing device including an upper conductive layer, a middle sensing film layer and a lower conductive layer as an example, and the sensing film layer is described by taking a conductive carbon film layer as an example. The upper conductive layer includes a plurality of first conductive wires extending along a first direction and spaced apart, and the lower conductive layer includes a plurality of second conductive wires extending along a second direction and spaced apart, the first direction intersects with the second direction, and the first conductive wires form an independent region in the region where the second conductive wires intersect in the direction;

[0076] The middle conductive carbon film layer is arranged between the upper conductive layer and the lower conductive layer and is attached to each other. A DC power supply is applied to the middle conductive carbon film layer. When the smart mat is not under pressure (not pressed or stepped on), the upper and lower conductive layers are attached to the conductive carbon film layer. When the smart mat is under pressure, the contact area between the upper and lower conductive layers and the conductive carbon film layer changes, and the change in contact area causes the circuit resistance to change.

[0077] The upper conductive layer and the lower conductive layer are equally divided into several independent areas (loops), the resistance value of each loop is quickly collected and converted into a voltage signal, and the change in the voltage signal is used to determine whether a certain area is under pressure.

[0078] See also Figure 2 and Figure 3 As shown, due to the particularity of the carbon film, after the conductive carbon film layer is energized, it will be affected by other circuits, and there will be a circuit parallel resistance R0 (unknown). R0 will cause great interference to the detection. If the interference of R0 can be eliminated, the acquisition accuracy can be improved.

[0079] Figure 2 and Figure 3 At a certain moment, the voltage value V output by a circuit t It is expressed as follows:

[0080]

[0081] Among them, R1 t It represents the contact resistance of the current collection area loop of the smart mat at a certain moment; R0 represents the parallel resistance from other collection area loops; R2 represents the voltage divider resistance of the current collection area loop of the smart mat; VO represents the DC power supply of the current collection area loop of the smart mat.

[0082] In order to eliminate the interference of the parallel resistor R0, this embodiment performs a reciprocal difference calculation of the electrical signal value. Specifically, the reciprocal maximum value is subtracted from the reciprocal minimum value to obtain a reciprocal difference value. as follows:

[0083]

[0084] Among them, V min Indicates the minimum voltage; V max Indicates the maximum voltage; Indicates the reciprocal maximum value; Indicates the reciprocal minimum value; R1 max Indicates the maximum contact resistance of the current acquisition area loop of the smart mat, R1 min Indicates the minimum contact resistance of the current collection area loop of the smart mat.

[0085] It should be noted that the reciprocal maximum value and the reciprocal minimum value described in this embodiment may change in real time. Each time the data is collected, the reciprocal maximum value and the reciprocal minimum value are updated based on the collected electrical signal value, and the difference is made. The first preset threshold is set according to the experimental value or experience value for judgment. If the reciprocal difference exceeds the first preset threshold, it is determined that the area is under pressure.

[0086] For further information, see Figure 4As shown, before the real-time acquisition of the electrical signal values ​​output by each area of ​​the smart mat, the method further includes:

[0087] The electrical signal value collection port is set to output mode, and the electrical signal value of the collection port is set to a set value;

[0088] After a preset time, the acquisition port of the electrical signal value is set to input mode.

[0089] When collecting the loop voltage signal, there are parasitic capacitance C1 of the carbon film and collection filter capacitance C2. Due to the need to quickly switch channel collection (there are many channels to be collected, and a single controller such as MCU cannot have so many collection ports, so the analog switch IC is used to switch channel collection to reduce the collection ports required by the MCU), during the collection, it will be disturbed by the last collection, and the capacitance values ​​of C1 and C2 are not in a certain parameter (C1 is the total capacitance value is uncertain, C2 is the total capacitance value is certain, and during the collection, the current capacitance values ​​of C1 and C2 are uncertain). Therefore, before collecting the voltage, first set the collection port to output mode, and output a voltage with the same potential as V0. Since the voltage at the collection point is the same potential as V0, the potential difference across the capacitor is equal to 0, and the charge Q=CU carried by the capacitor is also equal to 0 (U represents the potential difference across the capacitor, C represents the capacitance value of the capacitor, and Q represents the charge carried by the capacitor). Therefore, the voltage of C1 can be discharged at this time. At the same time, because the voltage at the collection point is V0, C2 can be instantly filled at this time. Then quickly set the acquisition port to input mode (MCU sets the acquisition port to input or output mode, and changes the channel mode by changing the register of the corresponding channel of MCU) to collect data. Since the potential at both ends of the capacitor cannot change suddenly, the collection is least disturbed at this time.

[0090] See also Figure 5 As shown, a smart mat pressure detection device comprises:

[0091] The electrical signal value acquisition module 501 is used to acquire the electrical signal value output by each area of ​​the smart mat in real time;

[0092] The difference processing module 502 is used to perform an inverse operation on the electrical signal values ​​of the same area at different times, extract the maximum and minimum inverse values, and perform a difference between the maximum and minimum inverse values ​​to obtain an inverse difference value;

[0093] The pressure detection module 503 is used to judge the reciprocal difference, and if the reciprocal difference exceeds a first preset threshold, it is determined that the area is under pressure.

[0094] The specific implementation of a smart mat pressure detection device and the smart mat pressure detection method are not repeatedly described in this embodiment.

[0095] Embodiment 2

[0096] See also Figure 6 As shown, the present invention provides a method for detecting pressure on a smart pad, comprising:

[0097] S601, collecting the electrical signal values ​​output by each area of ​​the smart mat in real time;

[0098] S602, extracting the maximum electrical signal value and the minimum electrical signal value at different times in the same area; performing a difference operation on the maximum electrical signal value and the minimum electrical signal value to obtain an electrical signal difference;

[0099] S603, judging the difference of the electric signal, if the difference of the electric signal exceeds a second preset threshold, it is determined that the area is under pressure.

[0100] In this embodiment, an execution subject of a smart pad pressure detection method includes an MCU controller and other devices, and this embodiment is not limited as long as the above method can be executed.

[0101] It should be noted that the area referred to in this embodiment can be an area divided according to the function of the smart mat, or an area divided according to detection needs or an area defined in other ways (it can be an actual physical area or a set virtual area). It is specifically restricted according to needs, and this embodiment does not impose any restrictions. In addition, the area can be understood as a sensing area, and the sensing area can be determined by judging the resistance change of the sensing area (such as the deformation of the carbon film in the pressure sensitive layer, resulting in a resistance change), or setting a capacitance sensing device to judge the capacitance change, or setting a resistance sensing device to judge the resistance change to determine whether it is pressed. The pressure described in this embodiment includes the force applied to the smart mat by pressing, or the force applied to the smart mat by stepping on it.

[0102] Specifically, this embodiment is described by taking a sensing device including an upper conductive layer, an intermediate conductive carbon film layer and a lower conductive layer as an example. The intermediate conductive carbon film layer is arranged between the upper conductive layer and the lower conductive layer and is bonded. A DC power supply is applied to the intermediate conductive carbon film layer. When the smart mat is not under pressure (not pressed or stepped on), the upper and lower conductive layers are bonded to the conductive carbon film layer. When the smart mat is under pressure, the contact area between the upper and lower conductive layers and the conductive carbon film layer changes. The change in contact area causes the loop resistance to change. The upper conductive layer and the lower conductive layer are equally divided into several independent areas (loops), and the resistance value of each loop is quickly collected and converted into a voltage signal. The change in the voltage signal is used to determine whether a certain area is under pressure.

[0103] The difference between this embodiment and the first embodiment is that for a smart mat that does not require particularly high detection accuracy, the reference Figure 2 and Figure 3 The loop parallel resistor R0 shown in the figure is set to a fixed value equal to or greater than 0 based on experience, so as to eliminate the interference of R0 on the detection by directly making a difference on the electrical signal value, thereby improving the acquisition accuracy.

[0104] In this embodiment, the voltage value V output by any region at a certain moment t It is expressed as follows:

[0105]

[0106] Among them, R1 t It represents the contact resistance of the current collection area loop of the smart mat at a certain moment; R0' represents the parallel resistance from other collection area loops, which is set to a fixed value greater than or equal to 0; R2 represents the voltage divider resistance of the current collection area loop of the smart mat; VO represents the DC power supply of the current collection area loop of the smart mat.

[0107] Perform a difference operation on the maximum electrical signal value and the minimum electrical signal value to obtain the electrical signal difference value V d ', as follows:

[0108]

[0109] Among them, V m ' in Indicates the minimum voltage; V m ' ax Indicates the maximum voltage; R1 max Indicates the maximum contact resistance of the current acquisition area loop of the smart mat, R1 min Indicates the minimum contact resistance of the current collection area loop of the smart mat.

[0110] It should be noted that the maximum value and the minimum value described in this embodiment may change in real time. Each time the data is collected, the maximum value and the minimum value are updated based on the collected electrical signal value, and the difference is made. A second preset threshold is set according to the experimental value or experience value for judgment. If the difference exceeds the second preset threshold, it is determined that the area is under pressure.

[0111] For further information, see Figure 7 As shown, before the real-time acquisition of the electrical signal values ​​output by each area of ​​the smart mat, the method further includes:

[0112] The electrical signal value collection port is set to output mode, and the electrical signal value of the collection port is set to a set value;

[0113] After a preset time, the acquisition port of the electrical signal value is set to input mode.

[0114] refer to Figure 5 As shown, the smart mat pressure detection device of this embodiment includes:

[0115] The electrical signal value acquisition module 501 is used to acquire the electrical signal value output by each area of ​​the smart mat in real time;

[0116] The difference processing module 502 is used to extract the maximum electric signal value and the minimum electric signal value at different times in the same area, and perform a difference operation on the maximum electric signal value and the minimum electric signal value to obtain an electric signal difference;

[0117] The pressure detection module 503 is used to determine the difference in the electrical signal. If the difference in the electrical signal exceeds a second preset threshold, it is determined that the area is under pressure.

[0118] Embodiment 3

[0119] See also Figure 8 As shown, this embodiment provides a smart mat, comprising:

[0120] The main body layer 801 is provided with an area for the user to press or step on;

[0121] The sensing device 802 is disposed below or inside the main body layer 801 and is used to sense the pressure on the area to output different resistance signals or electrical signals;

[0122] The control module 803 is connected to the sensor device 802 and is configured to execute the smart mat pressure detection method and is also configured to convert the resistance signal into an electrical signal when the sensor device 803 outputs a resistance signal.

[0123] Specifically, in one embodiment, if the sensor device 802 outputs an electrical signal such as a voltage signal, the control module 803 only needs to execute the smart mat pressure detection method, that is, the following steps: real-time acquisition of the electrical signal values ​​output by each area of ​​the smart mat; difference processing of the electrical signal values ​​collected at different times in the same area to obtain the difference; judging the difference, if the difference exceeds a preset threshold, it is determined that the area is under pressure. At this time, the control module 803 can be implemented by a controller. In another embodiment, if the sensor device 802 outputs a resistance signal, the control module 803 needs to convert the resistance signal into an electrical signal before executing the above-mentioned key detection method. Specifically, the conversion of the resistance signal into an electrical signal can be implemented by the software of the controller, or it can be converted by a hardware circuit and then the electrical signal is sent to the controller.

[0124] It should be noted that the control module 803 can be arranged inside the main body layer 801 or outside the main body layer 801 .

[0125] See also Fig. 9As shown, the sensing device in this embodiment includes an upper conductive layer 8021, an intermediate conductive carbon film layer 8022 and a lower conductive layer 8023. The intermediate conductive carbon film layer 8022 is arranged between the upper conductive layer 8021 and the lower conductive layer 8023 and is bonded. The intermediate conductive carbon film layer 8022 leads to a wire 8024. The upper conductive layer 8021 and / or the lower conductive layer 8023 are connected to the collection port. When the smart mat is not under pressure (not pressed or stepped on), the upper and lower conductive layers are bonded to the conductive carbon film layer. When the smart mat is under pressure, the contact area between the upper and lower conductive layers and the conductive carbon film layer changes, and the change in contact area causes the circuit resistance to change. The upper conductive layer and the lower conductive layer are equally divided into several independent areas (circuits), and the resistance value of each circuit is quickly collected and converted into a voltage signal. Whether a certain area is under pressure is determined based on the change in the voltage signal. The material of the upper conductive layer and the lower conductive layer includes aluminum foil.

[0126] Furthermore, the smart mat includes a dance mat or a yoga mat, and of course, may also include other mats, and the specific application of this embodiment is not limited.

[0127] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for detecting pressure on a smart mat, characterized in that: include: Collect the electrical signal values ​​output by each area of ​​the smart mat in real time; Performing difference processing on the electrical signal values ​​collected at different times in the same area to obtain the difference; The difference is judged, and if the difference exceeds a preset threshold, it is determined that the area is compressed.

2. The method for detecting pressure on a smart mat according to claim 1, characterized in that: The difference processing is performed on the electrical signal values ​​collected at different times in the same area to obtain the difference, specifically including: Perform inverse operation on the electrical signal values ​​of the same area at different times, and extract the maximum and minimum inverse values; Subtract the maximum reciprocal value from the minimum reciprocal value to obtain the reciprocal difference; The difference is judged. If the difference exceeds the preset threshold, it is determined that the area is under pressure, including: The reciprocal difference is judged, and if the reciprocal difference exceeds a first preset threshold, it is determined that the area is under pressure.

3. The method for detecting pressure on a smart mat according to claim 2, characterized in that: The electrical signal value is a voltage value; the voltage value V output by any region at a certain moment t It is expressed as follows: Among them, R1 t It represents the contact resistance of the current collection area loop of the smart mat at a certain moment; R0 represents the parallel resistance from other collection area loops; R2 represents the voltage divider resistance of the current collection area loop of the smart mat; VO represents the DC power supply of the current collection area loop of the smart mat.

4. The method for detecting pressure on a smart mat according to claim 3, characterized in that: Subtract the maximum reciprocal value from the minimum reciprocal value to obtain the reciprocal difference The details are as follows: Among them, V min Indicates the minimum voltage; V max Indicates the maximum voltage; Indicates the reciprocal maximum value; Indicates the reciprocal minimum value; R1 max Indicates the maximum contact resistance of the current acquisition area loop of the smart mat, R1 min Indicates the minimum contact resistance of the current collection area loop of the smart mat.

5. The method for detecting pressure on a smart mat according to claim 1, characterized in that: The difference processing is performed on the electrical signal values ​​collected at different times in the same area to obtain the difference, specifically including: Extract the maximum and minimum electrical signal values ​​of the same area at different times; Performing a difference operation on the maximum electrical signal value and the minimum electrical signal value to obtain an electrical signal difference value; The difference is judged. If the difference exceeds the preset threshold, it is determined that the area is under pressure, including: The electrical signal difference is judged, and if the electrical signal difference exceeds a second preset threshold, it is determined that the area is under pressure.

6. The method for detecting pressure on a smart mat according to claim 5, characterized in that: The electrical signal value is a voltage value; the voltage value V output by any region at a certain moment t It is expressed as follows: Among them, R1 t It represents the contact resistance of the current collection area loop of the smart mat at a certain moment; R0' represents the parallel resistance from other collection area loops, which is a set value greater than or equal to 0; R2 represents the voltage divider resistance of the current collection area loop of the smart mat; VO represents the DC power supply of the current collection area loop of the smart mat.

7. The method for detecting pressure on a smart mat according to claim 6, characterized in that: Perform a difference operation on the maximum electrical signal value and the minimum electrical signal value to obtain the electrical signal difference value V d ', as follows: Among them, V m ' in Indicates the minimum voltage; V m ' ax Indicates the maximum voltage; R1 max Indicates the maximum contact resistance of the current acquisition area loop of the smart mat, R1 min Indicates the minimum contact resistance of the current collection area loop of the smart mat.

8. The method for detecting pressure on a smart mat according to claim 1, characterized in that: Before the real-time acquisition of the electrical signal values ​​output by each area of ​​the smart mat, the method further includes: The electrical signal value collection port is set to output mode, and the electrical signal value of the collection port is set to a set value; After a preset time, the acquisition port of the electrical signal value is set to input mode; Among them, the collection port is the output end of the current collection area loop of the smart mat, and the set value is the DC power supply of the input end of the current collection area loop of the smart mat.

9. A smart mat pressure detection device, characterized in that: include: The electrical signal value acquisition module is used to collect the electrical signal values ​​output by each area of ​​the smart mat in real time; A difference processing module is used to perform difference processing on the electrical signal values ​​collected at different times in the same area to obtain a difference; The pressure detection module is used to judge the difference. If the difference exceeds a preset threshold, it is determined that the area is under pressure.

10. The smart mat pressure detection device according to claim 9, characterized in that: The difference processing module is specifically used to perform an inverse operation on the electrical signal values ​​of the same area at different times, extract the inverse maximum value and the inverse minimum value, and perform a difference between the inverse maximum value and the inverse minimum value to obtain the inverse difference value; The pressure detection module is specifically used to judge the reciprocal difference, and if the reciprocal difference exceeds a first preset threshold, it is determined that the area is under pressure.

11. The smart mat pressure detection device according to claim 9, characterized in that: The difference processing module is specifically used to extract the maximum electrical signal value and the minimum electrical signal value at different times in the same area, perform a difference operation on the maximum electrical signal value and the minimum electrical signal value, and obtain an electrical signal difference; The pressure detection module is specifically used to judge the difference of the electrical signal. If the difference of the electrical signal exceeds a second preset threshold, it is determined that the area is under pressure.

12. A smart mat, characterized in that: include: The main body layer is provided with an area for the user to press or step on; A sensing device, disposed below or inside the body layer, for sensing the pressure on the area to output different resistance signals or electrical signals; The control module is connected to the sensing device and is configured to execute the smart mat pressure detection method as described in any one of claims 1 to 8, and is also configured to convert the resistance signal into an electrical signal when the sensing device outputs a resistance signal.

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