Pressure sensing heating blanket and smart home system based on same

Abstract

The invention belongs to the field of graphene heating films, and particularly relates to a pressure sensing heating blanket and a smart home system based on the same. The pressure sensing heating blanket comprises a blanket cover, a functional film and a control module. The functional film is composed of a heating film and a pressure sensing film. The heating film comprises a substrate layer, a graphene heating layer, an electrode connecting layer, an electrode current-carrying strip, a heat storage slow release layer and a protective film. The pressure sensing film comprises a conductive layer, and the conductive layer is composed of a plurality of pieces of conductive cloth which are distributed on the protective film in an array mode. Wherein the heating film is powered by an external power supply through the control module. And the conductive layer and the surface layer of the blanket cover form a friction nano generator. A piezoelectric layer can also be arranged on the conductive layer to form a piezoelectric nano generator. Each friction / piezoelectric nanometer generator in the pressure sensing heating blanket serves as a sensor unit to achieve pressure sensing and is applied to an intelligent home system. The problems that an existing graphene heating film is single in function and an intelligent home system is high in cost are solved.

Description

Technical Field

[0001] The present invention belongs to the field of graphene heating films, and in particular relates to a pressure sensing heating blanket and a smart home system based on the pressure sensing heating blanket. Background Art

[0002] Graphene is a two-dimensional material with a single layer of carbon atoms, which has excellent electrical conductivity, thermal conductivity and mechanical strength. Due to its unique properties, graphene is widely used in various fields, including electronics, optics, energy and biomedicine. In the field of electronics, graphene heating film has been widely studied and applied. Graphene heating film generates heat by electricity and can be used in applications such as heating devices, temperature control and heat dissipation. However, the existing graphene heating film has a single function and only has heating function, lacking the expansion of other sensing functions, especially in smart home, industrial automation and Internet of Things applications.

[0003] A smart home system is a system that remotely controls smart devices installed in the home based on user instructions or sensor detection data. In a typical application scenario, when a user gets up at night to use the toilet, the smart home system can automatically turn on the night light for the user and preheat the smart toilet, thereby greatly improving the user experience. However, the application of existing smart home systems relies on a wide range of sensors, such as proximity switches and human presence sensors. These sensors are expensive, which greatly increases the deployment cost of the smart home system and is not conducive to the promotion and application of the smart home system. Summary of the invention

[0004] In order to solve the problems of single function of existing graphene heating films and high cost of smart home systems, the present invention provides a pressure sensing heating blanket and a smart home system based thereon.

[0005] The present invention is implemented by the following technical solutions:

[0006] A pressure sensing heating blanket, comprising a blanket cover made of fabric including a surface layer and a cushion layer, a functional membrane located between the surface layer and the cushion layer, and a control module electrically connected to the functional membrane. The functional membrane is composed of a heating membrane and a pressure sensing membrane thereon. In order from bottom to top, the heating membrane comprises: a base layer, a graphene heating layer, an electrode connection layer, an electrode current carrying strip, a heat storage slow release layer and a protective membrane. The pressure sensing membrane comprises a conductive layer, which is composed of a plurality of conductive fabrics distributed in an array on the protective membrane.

[0007] The heating film is powered by an external power supply through the control module. Each conductive cloth in the conductive layer and the surface layer of the blanket cover in the corresponding area above form an electrode and a first friction material. The foreign object acts as the second friction material and then forms a friction nanogenerator with the electrode and the first friction material. Each friction nanogenerator acts as a sensor unit, and then generates an electrical signal when the foreign object contacts and separates from the surface layer of the blanket cover, and outputs it through the control module.

[0008] Alternatively, the conductive layer also includes a piezoelectric layer arranged in an array; the piezoelectric layer uses a piezoelectric film. Each conductive cloth in the conductive layer and the piezoelectric layer in the corresponding area above form a piezoelectric nanogenerator. Each piezoelectric nanogenerator acts as a sensor unit, and then generates an electrical signal when subjected to pressure, and outputs it through a control module.

[0009] As a further improvement of the present invention, the graphene heating layer is printed by graphene ink.

[0010] The electrode connection layer is obtained by printing the silver paste material on the base layer through a gravure printing process.

[0011] The electrode current-carrying strip is obtained by hot-pressing and curing a metal strip cut into a specified shape with a base layer.

[0012] The base layer and the protective layer are made of insulating polymer film materials.

[0013] As a further improvement of the present invention, the graphene ink is obtained by fully mixing graphene powder, nanographite, conductive carbon black, conductive resin and a dispersant in a specified ratio.

[0014] The electrode current-carrying strip is made of metallic copper.

[0015] As a further improvement of the present invention, the base layer and the protective layer constitute a complete membrane structure covering the graphene heating layer, the electrode connecting layer, the electrode current carrying strip and the heat storage slow-release layer;

[0016] The polymer film material used for the base layer and the protective layer is any one of polyvinyl alcohol (PVA), polyester (PET), polyimide (PI), polyethylene naphthalate (PEN), and polydimethylsiloxane (PDMS).

[0017] As a further improvement of the present invention, a heat reflection layer may be provided between the base layer of the heating film and the graphene heating layer.

[0018] As a further improvement of the present invention, the control module includes a power adapter and a signal processing unit. The power adapter is used to convert the voltage of the connected external power supply into the working voltage of the heating film. The signal processing unit is electrically connected to each sensor unit in the functional film, each sensor unit has a position code representing its spatial distribution information, and the signal processing unit is used to convert the electrical signal generated by each sensor unit into a pressure signal in the sensing mode, and output the pressure signal and the position code together as a sensing signal.

[0019] As a further improvement of the present invention, the pressure sensing heating blanket also includes or is connected to an energy storage module; and the control module also includes a rectifier unit. The rectifier unit is used to rectify the electric energy generated by each sensor unit in the non-sensing mode and input it into the energy storage module for storage; the stored electric energy is used to power the heating film or other devices.

[0020] As a further improvement of the present invention, the energy storage module adopts a lithium battery. The rectifier unit includes a capacitor and a plurality of rectifier bridges corresponding to and electrically connected to each sensor unit in the functional membrane. The output end of each sensor unit is electrically connected to the input end of the rectifier bridge, and the output end of the rectifier bridge is respectively connected to the two plates of the capacitor; the two plates of the capacitor serve as the output end of the electric energy and are electrically connected to the lithium battery.

[0021] The present invention also includes a smart home system based on a pressure sensing heating blanket, which includes: the aforementioned pressure sensing heating blanket, as well as a variety of smart home products and a central manager. Among them, the pressure sensing heating blanket is laid in the room and used as a carpet, cushion and electric blanket. The pressure sensing heating blanket also has heating, power generation and pressure sensing functions. Smart home products include smart lamps, smart sanitary ware, smart locks, electric curtains, monitoring equipment, audio and video equipment, and alarms. The central manager is connected to the pressure sensing heating blanket and each smart home product in communication; the central manager is used to obtain the sensing signals output by each sensor unit in the pressure sensing heating blanket, and then perform spatial positioning, gait recognition and identity recognition of the user in combination with the sensing signals; finally, according to the results of spatial positioning, gait recognition and identity recognition, the operating status of the specified smart home product is automatically controlled according to the preset control logic.

[0022] As a further improvement of the present invention, the control module of the pressure sensing heating blanket and the central manager, as well as the smart home product and the central manager, are connected to each other by wireless communication technology based on Zigbee, WiFi, Bluetooth, Z-wave, UWB, LiFi or LPWAN. Corresponding communication modules are installed in the control module, the central manager and the smart home product.

[0023] As a further improvement of the present invention, the smart home system based on the pressure sensing heating blanket also includes one or more of a human sensor, a temperature sensor, and a humidity sensor. The human sensor, the temperature sensor, and the humidity sensor are electrically connected to the central manager, and the central manager automatically controls the operating state of the specified smart home product by combining the sensing signals of each sensor unit in the pressure sensing heating blanket and the detection signals of any one or more of the human sensor, the temperature sensor, and the humidity sensor.

[0024] The technical solution provided by the present invention has the following beneficial effects:

[0025] The present invention integrates a large number of array-distributed friction nano-power generation units or piezoelectric nano-power generation units on the graphene heating film, thereby obtaining a new type of pressure sensing heating blanket with heating, power generation and pressure sensing functions. The pressure sensor heating blanket can be used as a cushion, carpet and electric blanket. While playing the conventional functions, it also has the function of compressive stress signal collection, and can be applied to smart home systems to assist in completing multiple functions such as spatial positioning, gait recognition and identity recognition, thereby improving the user experience of smart home systems.

[0026] The pressure sensing heating blanket provided by the present invention has rich functions and simple structure, and can be mass-produced using existing production lines, and the product cost is low. The pressure sensing function of the product can partially replace the expensive human presence sensors and other products in the existing smart home system, and thus has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the pressure sensing heating blanket provided in Example 1 of the present invention.

[0028] Figure 2 Schematic diagram of the structure of the functional membrane using a friction nanogenerator as a sensor unit in a pressure sensing heating blanket.

[0029] Figure 3 This is a schematic diagram of the structure of the functional membrane using a piezoelectric nanogenerator as a sensor unit in a pressure sensing heating blanket.

[0030] Figure 4 Schematic diagram of the structure of a functional film with a heat reflection layer.

[0031] Figure 5 This is a schematic diagram of module connections of a control module used in the pressure sensing heating blanket in Example 1 of the present invention.

[0032] Figure 6 This is a schematic diagram of the module connections of the pressure sensing heating blanket with power generation and energy storage functions in Example 1 of the present invention.

[0033] Figure 7 The schematic diagram of the power generation function of the pressure sensing heating blanket in Example 1 of the present invention

[0034] Figure 8 This is a circuit schematic diagram of the rectifier unit used in the pressure sensing heating blanket in Example 1 of the present invention.

[0035] Fig. 9 This is a system architecture diagram of a smart home system based on a pressure sensing heating blanket provided in Example 2 of the present invention.

[0036] Fig.10 This is a functional principle diagram of the smart home system in Example 2 of the present invention.

[0037] The markings in the figure are:

[0038] 1. Surface layer, 2. Cushion layer, 3. Functional film; 11. Conductive layer; 12. Piezoelectric layer; 21. Protective film; 22. Heat storage and slow release layer; 23. Electrode current carrying strip; 24. Electrode connecting layer; 25. Graphene heating layer; 26. Base layer; 27. Heat reflection layer. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] Example 1

[0041] Friction nanogenerators and piezoelectric nanogenerators are very effective micro-nanomechanical high entropy energy collection technologies, and are particularly suitable for converting irregular, low-frequency, and weak mechanical energy into electrical energy. On this basis, in view of the high cost of human presence sensors and proximity switch light sensors used in existing smart home systems, this embodiment integrates a large number of sensor units based on friction nanogenerators and piezoelectric nanogenerators on a graphene heating film, and then combines this graphene heating film with integrated sensor units with a blanket to obtain a pressure sensor heating blanket. The pressure sensor heating blanket can be used as a carpet, sofa cushion, electric blanket, etc.

[0042] The large number of sensor units integrated on the graphene heating film in this embodiment are used to realize pressure sensing, and support the combination of the position information of each sensor unit to realize functions such as target positioning, identity recognition, gait analysis, etc., replacing the human presence sensor in the existing smart home system. On the other hand, the sensor unit can also use mechanical energy to generate electricity to realize self-power supply, thereby reducing the energy consumption during the operation of the graphene heating film.

[0043] Specifically, Figure 1As shown, the pressure sensing heating blanket provided in this embodiment includes a blanket cover made of fabric including a surface layer 1 and a cushion layer 2, a functional membrane 3 located between the surface layer 1 and the cushion layer 2, and a control module electrically connected to the functional membrane 3. Figure 2 As shown, the functional film 3 is composed of a heating film and a pressure sensing film above it. In order from bottom to top, the heating film includes: a base layer 26, a graphene heating layer 25, an electrode connection layer 24, an electrode current-carrying strip 23, a heat storage slow-release layer 22 and a protective film 21. The pressure sensing film includes a conductive layer 11, and the conductive layer 11 is composed of a plurality of conductive cloths distributed in an array on the protective film 21. Among them, the heating film is powered by an external power supply through a control module. Each conductive cloth in the conductive layer 11 and the surface layer 1 of the blanket cover in the corresponding area above constitute an electrode and a first friction material, and the external object acts as a second friction material and then forms a friction nanogenerator with the electrode and the first friction material. Each friction nanogenerator acts as a sensor unit, and then generates an electrical signal when the external object contacts and separates from the surface layer 1 of the blanket cover, and outputs it through the control module.

[0044] In another embodiment of the present invention, Figure 3 As shown, the conductive layer 11 also includes an array-arranged piezoelectric layer 12; the piezoelectric layer 12 uses a polyvinylidene fluoride (PVDF) piezoelectric film. Each conductive cloth in the conductive layer 11 and the piezoelectric layer 12 in the corresponding area above constitute a piezoelectric nanogenerator. Each piezoelectric nanogenerator acts as a sensor unit, and then generates an electrical signal when subjected to pressure, and outputs it through a control module.

[0045] like Figure 4 As shown, in a further optimized solution of this embodiment, a heat reflection layer 27 can be further arranged between the base layer 26 of the heating film and the graphene heating layer 25, and the heat reflection layer 27 is made of a material with lower thermal conductivity and higher thermal reflection performance.

[0046] The pressure sensing heating blanket in this embodiment has three functions. The first is that the heat generated by the heating film contained therein can be used to locally heat the user's floor, sofa, seat or bed in cold seasons such as winter. Improve the user's home comfort. The second is to use the pressure sensing membrane contained therein to achieve pressure sensing. The detection signals of a large number of sensor units arrayed in the pressure sensing membrane of this embodiment can support tasks such as identity recognition, sleeping posture detection, and motion tracking; thereby achieving tasks that require the combination of multiple sensors in the prior art. The third is to use the pressure sensing membrane contained therein to generate electricity, and use the electricity collected during idle time to power the smart home system.

[0047] In this embodiment, Figure 2 Provides a product solution for pressure sensing membrane designed based on the principle of friction nanogenerator. Figure 3 A product solution of pressure sensing membrane designed based on the principle of piezoelectric nanogenerator is provided. In the above two solutions, Figure 3 The solution is relatively better because the latter can not only realize pressure sensing, but also measure the pressure value at each sensor unit more accurately.

[0048] 1. Heating function

[0049] In practical applications, the graphene heating layer 25 in the heating film is printed by graphene ink. Graphene ink is obtained by mixing graphene powder, nanographite, conductive carbon black, and conductive resin with a dispersant in a specified ratio. The electrode connection layer 24 is obtained by printing a silver paste material on the base layer 26 by a gravure printing process. In order to achieve directional heating in the heating film, the graphene heating layer 25 and the electrode connection layer 24 in the heating film can be patterned by a printing process.

[0050] In this embodiment, the electrode current-carrying bar 23 is obtained by hot-pressing and curing a metal strip cut into a specified shape and a base layer 26. The electrode current-carrying bar 23 is electrically connected to the graphene heating layer 25 through the electrode connecting layer 24. The electrode current-carrying bar 23 in this embodiment can be a nickel-plated copper electrode. The heat storage slow-release layer 22 can be made of various materials with high specific heat capacity and low thermal conductivity that are widely used in existing graphene heating products.

[0051] The base layer 26 and the protective layer are made of insulating polymer film materials. In the more optimized scheme of this embodiment, the base layer 26 and the protective layer constitute a complete film structure of the graphene heating layer 25, the electrode connection layer 24, the electrode current-carrying strip 23 and the heat storage slow-release layer 22. Therefore, the base layer 26 and the protective layer have waterproof and insulating properties, which improve the service life and safety of the generated. Specifically, the polymer film material used in the base layer 26 and the protective layer is any one of polyvinyl alcohol, polyester, polyimide, polyethylene naphthalate, and polydimethylsiloxane. In addition to polyvinylidene fluoride piezoelectric film, the piezoelectric material used in the piezoelectric layer 12 can also be lead zirconate titanate (PZT), lead zirconate titanate (PZ), barium titanate, etc.

[0052] Similar to traditional graphene heating film products, the heating film in this embodiment converts external electrical energy into the internal energy of the graphene heating layer 25 and releases it outward. During the heat release process, the heat storage slow-release layer 22 can first absorb a large amount of heat conducted outward by the graphene heating layer 25, and then slowly release it outward. Therefore, the heating film does not need to be powered for a long time to generate heat during use. The power can be cut off after reaching the temperature threshold, and the heat storage slow-release layer 22 will slowly release the absorbed heat to the outside after the power is cut off. This intermittent operation mode is not only more energy-saving, but also can prevent the heating film from overheating and improve the user experience.

[0053] 2. Pressure sensing function

[0054] This embodiment uses friction nanogenerators and piezoelectric nanogenerators in the heat-generating rice array to achieve pressure sensing. This new type of pressure sensor device can achieve self-excitation and can realize pressure detection without external functions, so it is more energy-saving and environmentally friendly.

[0055] In addition, the functional film 3 including the heating film and the pressure sensing film used in the pressure sensor heating blanket provided in this embodiment can be mass-produced using a roll-to-roll-gravure printing process, flow drying, return wheel cooling and hot pressing composite integrated production line. And it is compatible with the existing production process of graphene heating film, and only needs to add the process of hot pressing the conductive layer 11 (conductive cloth) and / or the piezoelectric layer 12 in the final process. Among them, the cost of the materials constituting the friction nanogenerator and the piezoelectric nanogenerator is low, so the manufacturing cost of the entire functional film 3 is also relatively low. Considering that the pressure sensor is not only low-cost, but also has multiple functions such as heating, pressure sensor, power generation, etc., it can replace the main function of the existing human sensor; therefore, this pressure sensor heating blanket has outstanding practical value.

[0056] In addition to the above improvements made to the structure of the functional film 3, in order to realize the newly added multiple functions, the control module of the pressure sensing heating blanket provided in this embodiment is also improved. Figure 5 As shown, the control module of this embodiment includes a power adapter and a signal processing unit. The power adapter is used to convert the voltage of the connected external power supply into the working voltage of the heating film. For example, in the prior art, in order to improve the safety of the heating film part that directly interacts with the human body, the working voltage of the graphene heating layer 25 is usually below 24V, so it is necessary to use a power adapter to step down the connected mains (220V) to near the working voltage of the heating film, and then electrically connect it to the electrode layer of the heating film.

[0057] The large number of friction nanogenerators and piezoelectric nanogenerators in the pressure sensing heating blanket provided in this embodiment actually constitute a complex neuron sensor array. Each sensor unit, as a neuron, needs to send the detection signal to a central nervous system (i.e., the signal processing unit in the control module) for unified processing. Therefore, the signal processing unit in this embodiment is electrically connected to each sensor unit in the functional membrane 3.

[0058] In the pressure sensing heating blanket of this embodiment, each sensor unit has a position code representing its spatial distribution information. The signal processing unit is used to convert the electrical signal generated by each sensor unit into a pressure signal in the sensing mode, and output the pressure signal and the position code together as a sensing signal.

[0059] On this basis, technicians can determine the stress distribution image in the entire pressure sensing heating blanket according to the various pressure signals output from the pressure sensing heating blanket and their position codes. The stress distribution image can reflect the size, position, shape and other information of the stress acting on the pressure sensing heating film. For a carpet-type pressure sensing heating blanket, the type of the current target object can be determined based on the shape and number of the detected stress distribution. For example, when the stress concentration areas are detected to be four and plum blossom-shaped, it can be determined that the currently detected target object is a pet such as a cat or dog. When the stress concentration areas are detected to be two and paw-shaped, it can be determined that the currently detected target object is a person. Considering that the stress size detected by the pressure sensing heating blanket is positively correlated with the weight of the target object, for the same type of target object, identity recognition can be further achieved based on the size of the stress. In addition, according to the spatial position changes of the stress concentration areas in the detected pressure sensing heating blanket, the movement trajectory of the target object in the room can also be recorded, and the position tracking of the target object can be achieved.

[0060] 3. Power generation and energy storage function

[0061] In this embodiment, the friction nanogenerator and piezoelectric nanogenerator as sensor units are essentially micro-generators. Therefore, each sensor unit can also be used as a generator unit in the non-sensing mode. On this basis, Figure 6 As shown, the pressure sensing heating blanket also includes or is connected to an energy storage module, and the control module also includes a rectifier unit. The rectifier unit is used to rectify the electrical energy generated by each sensor unit in the non-sensing mode and then input it into the energy storage module for storage.

[0062] like Figure 7 As shown, when the user walks or jumps on the ground with a carpet-type pressure-sensing heating blanket, each generator unit in contact with the sole of the foot will generate and output electrical energy using the principle of frictional power generation or piezoelectric effect under the stimulation of the mechanical energy output by the user. This embodiment uses lithium batteries as energy storage modules to collect and store the weak electrical energy output by each micro-generator. Although the amount of electricity output by each micro-generator is limited, the electrical energy generated by a large number of micro-generator units is collected and stored for a long time and then used, and the electrical energy collected in the end is still very considerable.

[0063] In the pressure sensing heating blanket, the electrical energy output of each micro generator is disordered. In order to utilize it, a rectifier unit is required in the energy collection process. Figure 8As shown, in the scheme of this embodiment, the rectifier unit includes a capacitor and a plurality of rectifier bridges corresponding to and electrically connected to each sensor unit in the functional membrane 3. The output end of each sensor unit is electrically connected to the input end of the rectifier bridge, and the output end of the rectifier bridge is respectively connected to the two plates of the capacitor; the two plates of the capacitor serve as the output end of the electric energy and are electrically connected to the lithium battery. The electric energy generated by each micro generator is converted from AC to DC after rectification, and the DC power is directionally stored in a large-capacity capacitor for temporary energy storage, and finally the capacitor transfers the electric energy to a lithium battery for long-term storage. The electric energy stored in the lithium battery can not only be output to the heating film for heating, but also can be used to power other devices in the smart home system.

[0064] Example 2

[0065] On the basis of the scheme in Example 1, Fig. 9 As shown, this embodiment also includes a smart home system based on a pressure sensing heating blanket. The smart home system adopts the pressure sensing heating blanket of the embodiment. In addition, the smart home system also includes a variety of smart home products and a central manager (MCU). Among them, the pressure sensing heating blanket is laid in the room and used as a carpet, cushion and electric blanket. In particular, the pressure sensing heating blanket also has heating, power generation and pressure sensing functions. Smart home products include smart lamps, smart sanitary ware, smart locks, electric curtains, monitoring equipment, audio and video equipment, and alarms. The central manager is connected to the pressure sensing heating blanket and each smart home product in communication. In the scheme of this embodiment, the pressure sensing heating blanket is both a detection device (sensing function) and an actuator (heating function and power generation function), the smart home product is an actuator, and the central manager is a controller. The three together constitute a closed-loop control system that can realize automatic control.

[0066] In practical applications, the central manager can use a single-chip microcomputer, such as Fig.10 As shown, the central manager is used to obtain the sensing signals output by each sensor unit in the pressure sensing heating blanket, and then perform spatial positioning, gait recognition and identity recognition of the user in combination with the sensing signals; finally, according to the results of spatial positioning, gait recognition and identity recognition, the operating status of the specified smart home product is automatically controlled according to the preset control logic.

[0067] In the solution of this embodiment, the control module of the pressure sensing heating blanket, the central manager and the smart home products are all provided with wireless communication modules based on wireless communication technology such as Zigbee, WiFi, Bluetooth, Z-wave, UWB, LiFi or LPWAN. The control module of the pressure sensing heating blanket and the central manager are connected by wireless communication, and the smart home products and the central manager are also connected by wireless communication.

[0068] In the solution of this embodiment, the central manager is the control core, and the pressure sensor heating blanket identifies and tracks the people in the room, and then realizes the joint adjustment and control of various smart home systems. Based on the tracking and positioning function realized by the pressure sensor heating blanket, the central manager can realize functions such as turning on and off lights, opening and closing doors, turning on TV, playing music, etc. for users. Using the stress signals collected by the electric blanket or mattress-type pressure sensor heating blanket, the user's lying posture can also be analyzed to realize health monitoring and reminders.

[0069] In addition, based on the pressure value, distribution area, and change frequency generated by the user on the carpet, the central manager can identify the gait of the specified user, and the gait recognition result can be used for identity recognition. In addition, the central manager can also count the duration of the user's walking, running, jumping and other actions in a day, and then monitor the user's health status. For families with elderly people living alone, the central manager can also implement fall warnings, safety monitoring and other functions based on the stress data detected by the pressure sensing heating blanket, etc.

[0070] In a more optimized solution of this embodiment, the smart home system based on the pressure sensing heating blanket also includes one or more of a human sensor, a temperature sensor, and a humidity sensor. The human sensor, the temperature sensor, and the humidity sensor are electrically connected to the central manager, and the central manager automatically controls the operating state of the specified smart home product by combining the sensing signals of each sensor unit in the pressure sensing heating blanket and the detection signals of any one or more of the human sensor, the temperature sensor, and the humidity sensor.

[0071] For example, at night, when the temperature sensor detects that the ambient temperature is low and the electric blanket type pressure sensing heating film detects that the user has been lying on the bed, the central manager can issue instructions to the control module of the pressure sensing heating film to control the pressure sensing heating film to start the heating function. Similarly, during low temperature periods, when the user sits on the sofa, the heating function of the pressure sensing heating film can also be turned on for the user.

[0072] In the actual application of the scheme of this embodiment, the central manager can be implemented by using a local computing device installed in the user's home or through a cloud platform. For example, an Internet of Things module is installed in the control module of the pressure sensing heating blanket and the smart home product, and then each device is connected to the server of the cloud platform through the Internet of Things. The pressure sensing heating blanket uploads the detected stress information to the cloud platform, and the cloud platform makes an assessment and judgment based on the stress information, and then issues control instructions to each smart home product in the system to adjust the operating status of each smart home product. After using the cloud platform, users can also log in to their personal management account to achieve remote control of smart home products.

[0073] It can be seen that the pressure sensing heating blanket provided in this embodiment can be used in combination with other sensors in the smart home system to collect a variety of information at low cost, enrich the sensing performance of the existing smart home system, and expand the functions and applications of the smart home system.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure sensing heating blanket, characterized in that: It includes a blanket cover made of fabric and including a surface layer and a cushion layer, a functional membrane located between the surface layer and the cushion layer, and a control module electrically connected to the functional membrane; The functional film is composed of a heating film and a pressure sensing film above it; In order from bottom to top, the heating film includes: a base layer, a graphene heating layer, an electrode connection layer, an electrode current carrying strip, a heat storage slow-release layer and a protective film; the pressure sensing film includes a conductive layer, and the conductive layer is composed of a plurality of conductive cloths distributed in an array on the protective film; The heating film is powered by an external power supply through the control module; each conductive cloth in the conductive layer and the surface layer of the blanket cover in the corresponding area above form an electrode and a first friction material, and the foreign object acts as a second friction material and then forms a friction nanogenerator with the electrode and the first friction material; each friction nanogenerator acts as a sensor unit; and then generates an electrical signal when the foreign object contacts and separates from the surface layer of the blanket cover, and outputs it through the control module; Alternatively, the conductive layer also includes a piezoelectric layer arranged in an array; the piezoelectric layer uses a piezoelectric film; each conductive cloth in the conductive layer and the piezoelectric layer in the corresponding area above constitute a piezoelectric nanogenerator; each piezoelectric nanogenerator acts as a sensor unit, and then generates an electrical signal when subjected to pressure, and outputs it through the control module.

2. The pressure sensing heating blanket according to claim 1, characterized in that: The graphene heating layer is printed by graphene ink; The electrode connection layer is obtained by printing a silver paste material on the substrate layer through a gravure printing process; The electrode current-carrying strip is obtained by hot-pressing and curing a metal strip cut into a specified shape with a base layer; The base layer and the protective layer are made of insulating polymer film materials.

3. The pressure sensing heating blanket according to claim 2, characterized in that: The graphene ink is obtained by fully mixing graphene powder, nanographite, conductive carbon black, conductive resin and dispersant in a specified ratio; The electrode current-carrying strip is made of metal copper.

4. The pressure sensing heating blanket according to claim 2, characterized in that: The base layer and the protective layer form a complete membrane structure covering the graphene heating layer, the electrode connecting layer, the electrode current carrying strip and the heat storage slow-release layer; The polymer film material used in the base layer and the protective layer is any one of polyvinyl alcohol, polyester, polyimide, polyethylene naphthalate, and polydimethylsiloxane.

5. The pressure sensing heating blanket according to claim 1, characterized in that: The control module includes a power adapter and a signal processing unit; the power adapter is used to convert the voltage of the connected external power supply into the working voltage of the heating film; the signal processing unit is electrically connected to each sensor unit in the functional film, each sensor unit has a position code representing its spatial distribution information, and the signal processing unit is used to convert the electrical signal generated by each sensor unit into a pressure signal in the sensing mode, and output the pressure signal together with the position code as a sensing signal to the outside.

6. The pressure sensing heating blanket according to claim 5, characterized in that: A heat reflection layer may also be provided between the base layer of the heating film and the graphene heating layer; and / or The pressure sensing heating blanket also includes or is connected to an energy storage module; and the control module also includes a rectifier unit; the rectifier unit is used to rectify the electrical energy generated by each sensor unit in a non-sensing mode and input it into the energy storage module for storage; the stored electrical energy is used to power the heating film or other equipment.

7. The pressure sensing heating blanket according to claim 6, characterized in that: The energy storage module adopts a lithium battery; the rectifier unit includes a capacitor and a plurality of rectifier bridges corresponding to and electrically connected to each sensor unit in the functional membrane; the output end of each sensor unit is electrically connected to the input end of the rectifier bridge, and the output end of the rectifier bridge is respectively connected to the two plates of the capacitor; the two plates of the capacitor serve as the output ends of electric energy and are electrically connected to the lithium battery.

8. A smart home system based on a pressure sensing heating blanket, comprising: The pressure sensing heating blanket according to any one of claims 1 to 7, wherein the pressure sensing heating blanket is laid in a room and used as a carpet, a cushion and an electric blanket; the pressure sensing heating blanket also has heating, power generation and pressure sensing functions; A variety of smart home products, including smart lamps, smart sanitary ware, smart locks, electric curtains, monitoring equipment, audio-visual equipment, and alarms; A central manager; which is in communication connection with the pressure sensing heating blanket and various smart home products; the central manager is used to obtain the sensing signals output by each sensor unit in the pressure sensing heating blanket, and then perform spatial positioning, gait recognition and identity recognition of the user in combination with the sensing signals; finally, according to the results of spatial positioning, gait recognition and identity recognition, the operating status of the specified smart home product is automatically controlled according to the preset control logic.

9. The smart home system based on the pressure sensing heating blanket as claimed in claim 8, characterized in that: The control module of the pressure sensing heating blanket and the central manager, as well as the smart home product and the central manager, are connected to each other using wireless communication technology based on Zigbee, WiFi, Bluetooth, Z-wave, UWB, LiFi or LPWAN; corresponding communication modules are installed in the control module, the central manager and the smart home product.

10. The smart home system based on the pressure sensing heating blanket as claimed in claim 8, characterized in that: It also includes one or any multiple of a human sensor, a temperature sensor, and a humidity sensor; the human sensor, the temperature sensor, and the humidity sensor are electrically connected to the central manager, and the central manager automatically controls the operating status of the specified smart home product by combining the sensing signals of each sensor unit in the pressure sensing heating blanket and the detection signals of any multiple of the human sensor, the temperature sensor, and the humidity sensor.

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