Flexible pressure sensor with heating function, heated seat and control method

Abstract

The present application belongs to the technical field of sensor, and particularly relates to a flexible pressure sensor with heating function, a heated seat and a control method. The flexible sensor comprises an upper substrate layer, a lower substrate layer and a packaging layer attached between the upper substrate layer and the lower substrate layer. The upper substrate layer is provided with a flexible heating material area and a pressure sensitive material area. The lower substrate is provided with a pattern electrode layer for conducting electricity after being in contact with the flexible heating material area and the pressure sensitive material area respectively. The pattern electrode layer comprises a heating electrode corresponding to the flexible heating material area and a pressure electrode corresponding to the pressure sensitive material area. The pressure electrode is in a multi-point array distribution. The seat of the seat cushion is provided with the flexible pressure sensor with heating function. The flexible sensor sprays or prints the flexible heating material and the pressure sensitive material on the flexible upper substrate layer, and is thin and flexible as a whole, and the heating performance is not affected after being bent.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sensors, and particularly relates to a flexible pressure sensor with a heating function, a heated seat and a control method. BACKGROUND

[0002] Currently, pressure detection and heating on a seat are usually arranged independently, and the two cannot be well interconnected and fused. The pressure detection sensor is mainly prepared by copper foil or aluminum foil line on a hard plastic film, and the device is hard, thick, high in cost and not resistant to bending. The heating mainly uses linear heating wires, which have defects such as no temperature control or inaccurate temperature control, and the heating wires are easily deformed or broken when stressed in the use process, which induces accidents and is not suitable for soft seat cushions. SUMMARY

[0003] The present application aims to overcome the defects that the heating wires are easily deformed or broken in the prior art, and provide a flexible pressure sensor with a heating function, a heated seat and a control method which can monitor pressure and intelligently heat.

[0004] The technical scheme adopted by the present application to solve the technical problems is:

[0005] A flexible pressure sensor with a heating function, characterized in that it comprises an upper substrate layer, a lower substrate layer and a packaging layer attached between the upper substrate layer and the lower substrate layer, the upper substrate layer is provided with a flexible heating material area and a pressure sensitive material area, and the lower substrate is printed with a pattern electrode layer for conducting electricity after contacting the flexible heating material area and the pressure sensitive material area respectively; the pattern electrode layer comprises a heating electrode corresponding to the flexible heating material area and a pressure electrode corresponding to the pressure sensitive material area, and the pressure electrode is distributed in a multi-point array.

[0006] Further, the pressure sensitive material area is arranged in multiple points in the upper substrate layer material, and the flexible heating material area is arranged at the periphery of the multiple pressure sensitive material areas.

[0007] Further, the flexible heating material area is entirely covered on the lower surface of the upper substrate layer, and the pressure sensitive material area is below the flexible heating material area.

[0008] Further, the pressure sensitive material area is entirely covered on the lower surface of the upper substrate layer, and the flexible heating material area is below the pressure sensitive material area.

[0009] Further, the pressure sensitive material area and the flexible heating material area are alternately arranged in a circular ring or a strip on the lower surface of the upper substrate layer.

[0010] Further, the lower surface of the flexible heating material area is arranged with a plurality of temperature sensors in a dot matrix manner, which are encapsulated between the upper and lower substrate layers inside the encapsulation layer.

[0011] Further, the flexible heating material area adopts carbon nanotubes or graphene.

[0012] An intelligent heating seat, characterized in that: the seat cushion of the seat is provided with the flexible sensor with a heating function as described above, the flexible sensor is connected with a controller through electrodes led out from the pattern electrode layer, the temperature sensor is electrically connected with the controller, the controller is provided with a communication module, the controller sends the output signal of the flexible sensor received to a smart phone or a smart display device through the communication module, and the heating electrode is connected with a heating power supply.

[0013] Further, the backrest cushion of the seat is also provided with the flexible pressure sensor with a heating function.

[0014] A control method of an intelligent heating seat, characterized in that:

[0015] When the flexible sensor on the seat cushion of the seat detects that the pressure values of multiple points are less than a set pressure value for a period of time, the controller cuts off the heating power supply and stops heating the seat.

[0016] When the flexible sensor on the seat cushion of the seat detects that the pressure values of multiple points are greater than a set pressure value for a period of time, and the temperature detected by the temperature sensor is less than a set value, the controller turns on the heating power supply and starts heating the seat.

[0017] The flexible pressure sensor with a heating function, the heating seat and the control method have the following beneficial effects:

[0018] 1. The flexible sensor of the present application sets the flexible heating material and the pressure-sensitive material on the flexible upper substrate layer by spraying or printing process, and the whole is very thin and flexible, and will not affect the heating performance after being bent.

[0019] 2. The flexible sensor of the present application is applied to the seat, the pressure on the seat cushion or the backrest can be monitored by the multiple-point pressure-sensitive material area to determine whether there is a person on the seat, the temperature of the seat is monitored by the temperature sensor on the flexible sensor to determine whether the seat needs to be heated, and the automatic heating and the closing of the heating power supply of the seat are realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0021] Figure 1 This is a cross-sectional schematic diagram of Embodiment 1 of the present invention;

[0022] Figure 2 This is a structural diagram of the upper base layer of Embodiment 1 of the present invention;

[0023] Figure 3 This is a structural diagram of the upper base layer in Embodiment 2 of the present invention;

[0024] Figure 4 This is a cross-sectional schematic diagram of Embodiment 3 of the present invention;

[0025] Figure 5 This is a structural diagram of the upper base layer in Embodiment 5 of the present invention;

[0026] Figure 6 This is a diagram of the intelligent heated seat system of Embodiment 6 of the present invention.

[0027] In the diagram: 1. Upper substrate layer, 2. Lower substrate layer, 3. Encapsulation layer, 4. Flexible heating material area, 5. Pressure-sensitive material area, 6. Patterned electrode layer, 61. Heating electrode, 62. Pressure electrode, 7. Temperature sensor, 8. Controller, 9. Intelligent display device. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0029] The flexible sensors of this invention are all made by spraying or printing materials on a flexible substrate. Each layer can be regarded as a thin film with a very small actual thickness. This specification magnifies the effect of each layer according to the manufacturing order of each layer and the printing area of ​​the material in each layer. The accompanying drawings are only schematic representations. Other products with the same design concept as this application are also within the protection scope of this application.

[0030] Example 1

[0031] like Figures 1-2 The embodiment of the flexible pressure sensor with heating function shown in the present invention includes an upper substrate layer 1, a lower substrate layer 2, and an encapsulation layer 3 bonded between the upper substrate layer 1 and the lower substrate layer 2. The upper substrate layer 1 is provided with a flexible heating material region 4 and a pressure-sensitive material region 5. The lower substrate is printed with a patterned electrode layer 6, which is used to conduct electricity after contacting the flexible heating material region 4 and the pressure-sensitive material region 5 respectively. The patterned electrode layer 6 includes a heating electrode 61 corresponding to the flexible heating material region 4 and a pressure electrode 62 corresponding to the pressure-sensitive material region 5. The pressure electrode 62 is distributed in a multi-point array.

[0032] The gap structure is formed between the upper substrate layer 1 and the lower substrate layer 2 by the encapsulation layer 3

[0033] In this embodiment, referring to Figure 2 The pressure sensitive material area 5 is arranged on the upper substrate layer 1 in multiple points, and the flexible heating material area 4 is arranged on the periphery of the multiple pressure sensitive material areas 5.

[0034] In order to implement multi-point temperature measurement, the lower surface of the flexible heating material area 61 is arranged with multiple temperature sensors 7, which are encapsulated between the upper substrate layer 1 and the lower substrate layer 2 inside the encapsulation layer 3.

[0035] The upper substrate layer 1 and the lower substrate layer 2 of this embodiment are preferably film substrates or fabric substrates.

[0036] The flexible heating material area 4 is selected from nano flexible heating materials, specifically, carbon nano composite materials that can generate far infrared radiation. Further, carbon nanotubes or graphene can be made on the surface of the fabric substrate by printing, sputtering, spraying, inkjet or scraping, and connected to the controller 8 through the heating electrode 61. The maximum heating temperature of the carbon nano composite material that can generate far infrared radiation can be controlled below 80 degrees, which can avoid the occurrence of fire caused by the unlimited temperature rise of the flexible heating sensor when the temperature sensor 7 fails.

[0037] The encapsulation layer 3 has a gap between the flexible heating material area 4, the pressure sensitive material area 5 and the patterned electrode, which generates an electrical signal when the flexible sensor is pressed.

[0038] The patterned electrode layer 6 is printed on the lower substrate layer 2 using conductive polymer materials such as silver, silver nanowires, ITO, carbon nanomaterials, PEDOT:PSS, etc.

[0039] Embodiment 2

[0040] Referring to Figure 3 Unlike embodiment 1, the flexible heating material can be printed on the lower surface of the upper substrate layer 1 as a whole, and then the pressure sensitive material is printed on part of the flexible heating material, that is, the flexible heating material area 4 covers the lower surface of the upper substrate layer 1 as a whole, and the pressure sensitive material area 5 covers the flexible heating material area 4 in the lower part of the flexible heating material area 4.

[0041] Embodiment 3

[0042] Unlike embodiment 2, the pressure sensitive material area 5 covers the lower surface of the upper substrate layer 1 as a whole, and the flexible heating material area 4 covers the pressure sensitive material in the lower part of the pressure sensitive material area 5.

[0043] Embodiment 4

[0044] Referring to Figure 4Unlike the embodiment 1, the pressure sensitive material area 5 and the flexible heating material area 4 are alternately arranged in the form of a circular ring on the lower surface of the upper substrate layer 1. Each of the circular ring-shaped flexible heating material area 4 has at least one temperature sensor 7, and the heating electrode 61 is also an electrode arranged in multiple arrays, so that the flexible sensor can be heated in different areas.

[0045] Embodiment 5

[0046] Referring to Figure 5 , the pressure sensitive material area 5 and the flexible heating material area 4 are alternately arranged in the form of a circular ring on the lower surface of the upper substrate layer 1. Each of the circular ring-shaped flexible heating material area 4 has at least one temperature sensor 7, and the heating electrode 61 is also an electrode arranged in multiple arrays, so that the flexible sensor can be heated in different areas.

[0047] Embodiment 6

[0048] Referring to Figure 6 , a smart heating seat, the flexible sensor of the above embodiments 1-5 can be arranged on the seat sponge cushion and / or back sponge cushion of the seat, the flexible sensor is connected with the controller 8 through the electrode leading out from the pattern electrode layer 6, the temperature sensor 7 is electrically connected with the controller 8, the controller 8 has a communication module, the controller 8 sends the received output signal of the flexible sensor to the smart phone or the smart display device 9 through the communication module, and the heating electrode 61 is connected with the heating power supply.

[0049] Taking the smart heating seat using the flexible sensor of the embodiment 4 as an example,

[0050] Generally, people do not contact all the cushions of the seat, and after the flexible sensor on the cushion is pressed, part of the flexible heating material area 4 and the pressure sensitive material area 5 are in contact with the pattern electrode layer 6 on the lower substrate layer 2, the pressure electrode 62 outputs an electric signal to the controller 8, the controller 8 sends to the smart display device 9 through communication, and the smart display device 9 can be a mobile phone, a car display screen and the like, and the pressure situation of each part of the cushion is displayed on the smart display device 9; when the flexible sensor on the seat sponge cushion detects that the pressure values of multiple points are greater than the set pressure value for a period of time, and the temperature detected by the temperature sensor 7 is less than the set value, the controller 8 makes the heating power supply conductive, and starts to heat the seat.

[0051] When the flexible sensor on the seat sponge cushion detects that the pressure values of multiple points are less than the set pressure value for a period of time, the controller 8 cuts off the heating power supply and stops heating the seat.

[0052] The pressure sensitive material area 62 and the flexible heating material area 61 are alternately and spaced apart, which can ensure that the place where the pressure is detected is heated, and the flexible heating material away from the area under the pressure does not contact the heating electrode 61 and will not be heated, thereby avoiding waste of electric energy.

[0053] In order to avoid being heated by mistake in the case of only putting a bottle of mineral water on the seat, the controller 8 starts the heating power supply to heat the seat only when the flexible sensor detects that the pressure distribution area is greater than a certain area.

[0054] The flexible sensor arranged on the backrest has the same implementation as that on the cushion, and the controller 8 only turns on the heating power supply to heat the backrest when the human body leans on the backrest to generate pressure on a certain area.

[0055] Because the flexible sensor is provided with a plurality of temperature sensors 7, the temperature of each area can be controlled individually.

[0056] The flexible pressure sensor with a heating function is soft, thin, and simple to manufacture, and is applied to the intelligent heating seat, so that the installation is very convenient and the cost of the intelligent heating seat is reduced.

[0057] Through the detection of the pressure of the flexible sensor, the controller 8 can more accurately detect whether there is a person on the seat according to the size of the pressure area and the total pressure, and then remind the person to fasten the seat belt.

[0058] The pressure of the whole contact surface can be displayed in the form of a two-dimensional or three-dimensional color pressure distribution image, and the whole pressure process can be recorded. The real-time detection pressure distribution data can be automatically analyzed, and can be exported for secondary data analysis or development.

[0059] The flexible surface heating not only improves the comfort of the human body, but also controls the temperature more accurately. The flexible sensor will not be damaged due to bending, stretching, etc., and has a long service life.

[0060] It should be understood that the specific embodiments described above are only used to explain the present application, and are not used to limit the present application. The obvious changes or modifications derived from the spirit of the present application are still within the protection scope of the present application.

Claims

1. A flexible pressure sensor having a heating function, characterized by: The flexible pressure sensor with heating function comprises an upper substrate layer (1), a lower substrate layer (2) and an encapsulation layer (3) attached between the upper substrate layer (1) and the lower substrate layer (2), the upper substrate layer (1) is provided with a flexible heating material area (4) and a pressure sensitive material area (5), and a pattern electrode layer (6) for conducting electricity after being contacted with the flexible heating material area (4) and the pressure sensitive material area (5) respectively is printed on the lower substrate layer; the pattern electrode layer (6) comprises a heating electrode (61) corresponding to the flexible heating material area (4) and a pressure electrode (62) corresponding to the pressure sensitive material area (5), and the pressure electrode (62) is distributed in a multi-point array form. The flexible heating material area (4) is made of carbon nano composite material capable of generating far infrared radiation, and the heating temperature of the carbon nano composite material is less than 80°. The pressure sensitive material area (5) and the flexible heating material area (4) are alternately and spacedly arranged to ensure that the place where pressure is detected is heated, and the flexible heating material away from the area pressed does not contact the heating electrode (61) and is not heated. 2.The flexible pressure sensor with heating function of claim 1, wherein: The pressure sensitive material area (5) is arranged on the upper substrate layer (1) in a multi-point area form, and the flexible heating material area (4) is arranged at the periphery of the plurality of pressure sensitive material areas (5). 3.The flexible pressure sensor with heating function of claim 1, wherein: The flexible heating material area (4) is entirely covered on the lower surface of the upper substrate layer (1), and the pressure sensitive material area (5) is arranged at the lower part of the flexible heating material area (4). 4.The flexible pressure sensor with heating function of claim 1, wherein: The pressure sensitive material area (5) is entirely covered on the lower surface of the upper substrate layer (1), and the flexible heating material area (4) is arranged at the lower part of the pressure sensitive material area (5). 5.The flexible pressure sensor with heating function of claim 1, wherein: The pressure sensitive material area (5) and the flexible heating material area (4) are alternately arranged in a circular ring or a strip form on the lower surface of the upper substrate layer (1). 6.The flexible pressure sensor with heating function of claim 1, wherein: A plurality of temperature sensors (7) are arranged on the lower surface of the flexible heating material area (4) in a dot matrix form, and the temperature sensors (7) are encapsulated between the upper substrate layer (1) and the lower substrate layer (2) inside the encapsulation layer (3).

7. The flexible pressure sensor with heating function according to any one of claims 1-6, characterized in that: The flexible heating material area (4) is made of carbon nano tube or graphene.

8. An intelligent heated seat, characterized by The flexible pressure sensor with heating function is arranged on the seat sponge of the seat, the flexible pressure sensor is connected with a controller (8) through electrodes led out from the pattern electrode layer (6), the temperature sensor (7) is electrically connected with the controller (8), the controller (8) has a communication module, the controller (8) sends the output signal of the flexible pressure sensor received to a smart display device (9) through the communication module, and the heating electrode (61) is connected with a heating power supply.

9. The smart heated seat of claim 8, wherein: The flexible pressure sensor with heating function is also arranged on the back sponge of the seat. 10.A control method of a smart heating seat, characterized in that: when the flexible pressure sensor on the seat sponge of the seat detects that the pressure values of multiple points are less than a set pressure value for a period of time, the controller (8) cuts off the heating power supply and stops heating the seat. When the flexible pressure sensor on the seat sponge of the seat detects multi-point pressure values continuously greater than a set pressure value for a period of time, and the temperature sensor (7) detects a temperature less than a set value, the controller (8) turns on the heating power supply to start heating the seat; The pressure-sensitive material area (5) and the flexible heating material area (4) are alternately and spacedly arranged, so that the place where pressure is detected is heated, and the flexible heating material away from the area pressed will not contact the heating electrode (61) and will not be heated; When the flexible pressure sensor detects a pressure distribution area greater than a set area, the controller (8) will start the heating power supply to heat the seat.

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