Pressure sensor and intelligent mattress

Abstract

The utility model provides a pressure sensor and intelligent mattress relates to smart home field, pressure sensor, including flexible detection layer, flexible detection layer includes flexible circuit board, signal processing module and induction module, signal processing module is provided in the safe area of flexible circuit board, induction module is provided in the detection area of flexible circuit board; the sensing module is electrically connected with the signal processing module; the sensing module comprises a plurality of pressure-sensitive units, and the plurality of pressure-sensitive units are electrically connected in sequence; the sensing module is used for outputting a detection electric signal to the signal processing module when the pressure-sensitive unit is in a pressure-bearing state, and the signal processing module is used for obtaining a pressure value corresponding to the detection electric signal. The pressure sensor has flexibility and high sensitivity, so that the pressure sensor can adapt to and cover to-be-detected objects such as mattresses with different shapes and sizes, detection can be carried out more accurately and comprehensively, and the detection accuracy is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of smart home, and more particularly to a pressure sensor and a smart mattress. Background Art

[0002] With the development of Internet of Things technology, smart home has developed rapidly and entered people's lives. Smart home integrates devices related to home life (such as refrigerators, air conditioners, smart mattresses, household appliances, etc.) through Internet of Things technology to build a residential facility management system that can be centrally managed and intelligently controlled. A smart mattress is a mattress with multiple softness levels obtained by integrating a variety of high-quality and healthy sleep raw materials according to human sleep habits through scientific combination and design, which has the advantages of comprehensively recording sleep data, providing personalized sleep solutions, and improving sleep quality.

[0003] Mattress pressure detection is one of the basic functions of a smart mattress, providing reference data for mattress softness adjustment, etc. Usually, a pressure sensor is placed inside the smart mattress for mattress pressure detection. However, the sensitivity of the pressure sensors used in traditional smart mattresses is low. Therefore, there is an urgent need for a high-sensitivity sensor that can detect minute pressure changes on the mattress. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pressure sensor and a smart mattress, which have higher detection sensitivity and can detect minute pressure changes on the mattress.

[0005] The utility model provides a technical solution:

[0006] In a first aspect, the utility model provides a pressure sensor, including a flexible detection layer, the flexible detection layer includes a flexible circuit board, a signal processing module and an induction module, the signal processing module is arranged in the safety area of the flexible circuit board, and the induction module is arranged in the detection area of the flexible circuit board;

[0007] The induction module is electrically connected to the signal processing module;

[0008] The induction module includes a plurality of pressure-sensitive units, and the plurality of pressure-sensitive units are electrically connected in sequence;

[0009] The induction module is configured to output a detection electrical signal to the signal processing module when the pressure-sensitive unit is in a pressure-bearing state, and the signal processing module is configured to obtain the pressure value corresponding to the detection electrical signal.

[0010] Optionally, the pressure sensor further includes a plurality of pressure-relieving members arranged on the flexible circuit board, the plurality of pressure-relieving members correspond to the plurality of pressure-sensitive units one by one, and each pressure-relieving member is close to the corresponding pressure-sensitive unit.

[0011] Optionally, the pressure relief member includes at least two pressure relief strips, the thickness of the pressure relief strips is the same as that of the pressure-sensitive unit, and the pressure-sensitive unit is located between the two pressure relief strips.

[0012] Optionally, the pressure sensor further includes a flexible support layer, and the flexible detection layer is disposed on the flexible support layer.

[0013] Optionally, the pressure sensor further includes a protective film with a hollow structure, and the flexible detection layer, the pressure relief member and the flexible support layer are all located inside the protective film.

[0014] Optionally, the flexible support layer is an elastic support plate, and the surface of the flexible support layer away from the flexible detection layer is used to be close to the support surface of the application device.

[0015] Optionally, the flexible detection layer further includes a first communication interface and a second communication port, and both the first communication interface and the second communication port are disposed in the safe area of the flexible circuit board.

[0016] Optionally, the pressure sensor is in a long strip shape, and a plurality of the pressure-sensitive units are arranged at equal intervals along the length direction of the detection area. The size of the pressure-sensitive unit is 5mm×5mm, and the distance between two adjacent pressure-sensitive units is 68mm.

[0017] In a second aspect, the present invention provides an intelligent mattress, including a mattress body, a control system and the pressure sensor as described in the first aspect;

[0018] The pressure sensor is disposed inside the mattress body, and the pressure sensor is communicatively connected with the control system;

[0019] The pressure sensor is used to measure the bearing value of the mattress body, and the control system is used to adjust the hardness of the mattress body; the hardness of the mattress body matches the bearing value.

[0020] Optionally, the control system includes a controller. There are a plurality of the pressure sensors, and the plurality of pressure sensors are arranged at equal intervals inside the mattress body, and the plurality of pressure sensors are electrically connected to the controller to form a sensor network inside the mattress body.

[0021] The beneficial effects of the pressure sensor and the intelligent mattress provided by the present invention are:

[0022] (1) In the pressure sensor provided by the present utility model, the sensing module includes a plurality of highly sensitive pressure-sensitive units, so that the sensing module located in the detection area of the flexible circuit board can more accurately detect the minute pressure of the surrounding environment (such as a mattress), and further enables the pressure sensor to have higher detection sensitivity;

[0023] (2) The pressure sensor using a flexible circuit board is flexible, can better adapt to mattresses of different shapes, sizes and bending states, and greatly reduces the overall size of the pressure sensor, so as to facilitate the integration of the pressure sensor into an intelligent mattress;

[0024] (3) Due to the flexibility, the pressure sensor has expandability, enabling the pressure sensor to adapt to and cover measured objects such as mattresses of different shapes and sizes, so as to perform more accurate and comprehensive detection, and further improving the accuracy of detection. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a block diagram of the flexible detection layer of the pressure sensor provided by the embodiment of the present utility model.

[0027] Figure 2 It is a structural diagram of the pressure sensor provided by the embodiment of the present utility model.

[0028] Figure 3 It is Figure 2 an enlarged schematic diagram of part A in

[0029] Figure 4 It is a cross-sectional view of the pressure sensor provided by the embodiment of the present utility model.

[0030] Figure 5 It is Figure 2 an enlarged schematic diagram of part B in

[0031] Figure 6 It is a series connection diagram of the pressure sensor provided by the embodiment of the present utility model.

[0032] Description of the reference numerals: 1 - flexible detection layer; 11 - flexible circuit board; 12 - signal processing module; 13 - sensing module; 14 - pressure-sensitive unit; 2 - flexible support layer; 3 - pressure-relieving member; 31 - pressure-relieving strip; 4 - protective film; 5 - first communication interface; 6 - second communication port; 10 - pressure sensor. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Components of the embodiments of the present utility model generally described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0035] It should be noted that: like reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0037] In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] In order to detect minute pressure changes on a mattress and obtain the pressure conditions on various mattresses more comprehensively and accurately, with reference to Figures 1 to 3 This utility model provides a pressure sensor, which includes a flexible detection layer 1. The flexible detection layer 1 includes a flexible circuit board 11, a signal processing module 12, and a sensing module 13. The signal processing module 12 is arranged in the safe area of the flexible circuit board 11, and the sensing module 13 is arranged in the detection area of the flexible circuit board 11.

[0040] The sensing module 13 is electrically connected to the signal processing module 12.

[0041] The sensing module 13 includes a plurality of piezoresistive units 14, and the plurality of piezoresistive units 14 are electrically connected in sequence.

[0042] The sensing module 13 is configured to output a detection electrical signal to the signal processing module 12 when the piezoresistive unit 14 is in a pressure-bearing state, and the signal processing module 12 is configured to obtain the pressure value corresponding to the detection electrical signal.

[0043] Among them, the detection area of the flexible circuit board 11 is the area that bears pressure, and the safe area is the area that does not bear pressure. The shape and size of the flexible circuit board 11 can be adaptively adjusted according to the change of the application scenario of the pressure sensor. For example, when the pressure sensor is applied to an intelligent mattress, the shape of the flexible circuit board 11 can be strip-shaped, and the length of the flexible circuit board 11 is consistent with the width of the intelligent mattress. When the pressure sensor is applied to a glove, when the pressure sensor is in the shape of a seat cushion, the pressure sensor can be circular or square. And the above are only examples, without specific implementation method steps limitations.

[0044] In addition, the signal processing unit can be but is not limited to any one of an MCU, a DSP chip, an FPGA, a single-chip microcomputer, etc., which is a processor with AD sampling and data processing capabilities.

[0045] When the above pressure sensor is applied to a measured object such as a mattress, if pressure is applied to the area where the pressure sensor is arranged on the measured object, the resistance value of at least one highly sensitive piezoresistive unit 14 immediately changes, causing the sensing module 13 to generate an electrical signal (such as it can be a current signal or a voltage signal). A conversion program is installed in the signal processing module 12, and by executing this conversion program, the electrical signal is converted to obtain the corresponding pressure value.

[0046] Among them, the conversion program for the signal processing module 12 to convert the electrical signal into a pressure value can be flexibly set. For example, the conversion formula between the electrical signal and the pressure value can be pre-fitted, and the conversion formula can be written into a conversion program and deployed to the signal processing module 12. Alternatively, a neural network model for converting the electrical signal into a pressure value can be pre-trained, and the conversion program corresponding to the model can be deployed to the signal processing module 12. Moreover, the above methods are only examples, and the specific implementation methods are not limited.

[0047] To improve the accuracy of the signal processing module 12 in converting the electrical signal into a pressure value, a calibration experiment can be carried out on the pressure sensor to obtain calibration data, and then the conversion formula for converting the electrical signal into a pressure value can be fitted according to the calibration data. Among them, the calibration experiment can include the following steps 1 to 3.

[0048] Step 1: Place the pressure sensor flat under a large airbag so that the contact area between the pressure sensor and the large airbag is uniform and flat.

[0049] Step 2: Inflate the large airbag so that the air pressure of the large airbag increases from 0 kPa to 5 kPa, and record the electrical signal values of the induction module at each target air pressure to obtain multiple groups of calibration data.

[0050] Among them, each group of calibration data includes the target air pressure and the electrical signal value at the target air pressure. In addition, the air pressure range for inflating the airbag can be flexibly adjusted. For example, it can be increased from 0 kPa to 10 kPa, or from 0 kPa to 20 kPa. The specific range is not limited.

[0051] Step 3: According to multiple groups of calibration data, use the piecewise fitting method to process the data to obtain the calibration curve and the conversion formula corresponding to the calibration curve.

[0052] Through the above steps 1 to 3 and similar calibration methods, the conversion relationship between the electrical signal and the actual pressure of the pressure sensor under different pressures can be obtained, thereby further improving the measurement accuracy of the pressure sensor for pressure.

[0053] In the above pressure sensor, due to multiple highly sensitive pressure-sensitive units 14, the induction module 13 located in the detection area of the flexible circuit board 11 can more accurately detect the minute pressure of the surrounding environment (such as a mattress), thereby making the pressure sensor have higher detection sensitivity. Moreover, the pressure sensor using the flexible circuit board 11 is flexible, can better adapt to the measured objects with different shapes, sizes and bending states, and greatly reduces the overall size of the pressure sensor, so as to facilitate the integration of the pressure sensor into the smart mattress. In addition, due to the flexibility, the pressure sensor has scalability, enabling the pressure sensor to adapt to and cover the measured objects such as mattresses with different shapes and sizes, so as to perform pressure detection more accurately and comprehensively, and further improving the accuracy of detection.

[0054] Among them, the pressure-sensitive unit 14 can be made of a pressure-sensitive resistor material with high sensitivity and good stability, which can generate an obvious resistance change under a tiny pressure change, so as to obtain the pressure change according to the resistance change or the voltage and current change values generated by the resistance change. Moreover, multiple pressure-sensitive units 14 of the same sensing module can be connected in series, in parallel, or in a combination of series and parallel, and it can be any possible connection method.

[0055] To make the pressure sensor have a stable base, the pressure sensor provided by the present utility model may further include a support layer disposed under the flexible detection layer 1. Among them, the setting of the support layer can be flexibly set. For example, it can be rigid or flexible, which is not limited in this embodiment.

[0056] To make the pressure sensor have both a stable base and not affect the comfort of household items such as mattresses when used on household items, referring to Figure 3 , the pressure sensor further includes a flexible support layer 2, and the flexible detection layer 1 is disposed on the flexible support layer 2.

[0057] Furthermore, the flexible support layer 2 can be made of a flexible material with elasticity, that is, the flexible support layer 2 is an elastic support plate, and the surface of the flexible support layer 2 away from the flexible detection layer 1 is used to be close to the support surface of the application device.

[0058] Among them, the material of the flexible support layer 2 can be a rubber plate, a polyester rubber plate, a cotton cloth, a polyvinyl chloride plate or any other material with flexibility and elasticity, which is not limited in this embodiment.

[0059] In addition, the flexible detection layer 1 and the flexible support layer 2 can be detachably connected or fixedly connected. For example, between the bottom surface of the flexible circuit board 11 and the surface of the flexible support layer 2 close to the flexible circuit board 11, they can be detachably connected by means of double-sided tape, Velcro, snap-fastener slots, screws, etc.

[0060] By disposing the flexible circuit board 11 on the flexible support layer 2 with elasticity, the material of the flexible support layer 2 not only provides a stable base, but also helps to disperse the pressure borne by the pressure sensor 10 and protects the flexible circuit board 11 from damage.

[0061] To avoid damage to the pressure-sensitive unit 14 due to the excessive pressure (i.e., too much pressure) it bears, the pressure-sensitive unit 14 is protected. Referring to Figure 4 , the pressure sensor 10 further includes a plurality of pressure-relieving members 3 disposed on the flexible circuit board 11. The plurality of pressure-relieving members 3 correspond to the plurality of pressure-sensitive units 14 one by one, and each pressure-relieving member 3 is close to the corresponding pressure-sensitive unit 14.

[0062] In this context, the material and geometric form of the pressure-relieving member 3 have high plasticity, allowing for flexible adjustment according to actual needs. Specifically, the pressure-relieving member 3 can be in the form of an annular elastic member surrounding the pressure-sensitive unit 14, or can be elastic strips provided on one or more sides of the pressure-sensitive unit 14. It should be noted that the implementation approach of this design solution is not limited to a specific mode, aiming to meet diverse application scenarios and performance optimization goals.

[0063] To ensure that the pressure-relieving member 3 can effectively share the pressure borne by the pressure-sensitive unit 14, avoid the pressure exceeding the range of the pressure-sensitive unit 14 and causing the elastic deformation of the pressure-sensitive unit 14 to exceed the limit, and at the same time not interfere with the normal operation of its pressure detection function, referring to Figure 3 and Figure 4 , the pressure-relieving member 3 includes at least two pressure-relieving strips 31. The pressure-relieving strips 31 and the pressure-sensitive unit 14 have the same thickness, and the pressure-sensitive unit 14 is located between the two pressure-relieving strips 31. Moreover, the two pressure-relieving strips 31 can be arranged along the length direction of the flexible circuit board 11.

[0064] Among them, the material of the pressure-relieving strip 31 can be EVA (i.e., ethylene-vinyl acetate copolymer), or can also be rubber, silica gel, spring steel, plastic or any other flexible material with sufficient elasticity. In this way, it can effectively help adjust and control the force applied to the pressure-sensitive unit 14, ensuring the stability and reliability of the pressure sensor. In actual applications, the choice of material depends on factors such as specific application scenarios, required functional characteristics, and cost considerations, and is not limited in this embodiment.

[0065] In addition, after the above pressure sensor is applied to the object to be measured or the measurement scenario, the normal operation of the flexible circuit board 11, the signal processing module 12, and the sensing module 13 is likely to be affected by water, dust, etc., thereby reducing or even damaging the performance of the pressure sensor. Therefore, a waterproof and dustproof function is introduced in the pressure sensor provided in the embodiment of the present utility model. Referring to Figure 4 , the pressure sensor further includes a hollow protective film 4, and the flexible detection layer 1, the pressure-relieving member 3, and the flexible support layer 2 are all located inside the protective film 4.

[0066] It can be understood that a series of components in the pressure sensor except the protective film 4 are all wrapped on the protective film 4.

[0067] Among them, the material of the protective film 4 can be set flexibly. For example, it can be a waterproof cloth, or polytetrafluoroethylene, polyurethane, polycarbonate, silica gel, or any other flexible material with high abrasion resistance, tear strength, impact resistance, and wear resistance. In this way, the protective film 4 not only has waterproof and dustproof properties, but also can prevent the protective film 4 itself and the property detection layer, pressure relief member 3, and flexible support layer 2 inside the protective film 4 from being damaged by impact, greatly improving the damage resistance of the pressure sensor. At the same time, it can also protect the comfort of the pressure sensor on the measured household items such as smart mattresses.

[0068] It should be understood that according to the requirements of the usage scenario, the pressure sensor provided by the embodiment of the present invention can be set alone on the object to be measured, or a plurality of pressure sensors can form a sensor network and then be set on the object to be measured.

[0069] In order to enable the pressure sensor to support both the communication requirements of individual setting and the communication requirements of a sensor network formed by connecting multiple pressure sensors in series or in parallel, referring to Figure 5 , the flexible detection layer 1 further includes a first communication interface 5 and a second communication port 6, and both the first communication interface 5 and the second communication port 6 are arranged in the safe area of the flexible circuit board 11.

[0070] Among them, the control circuit board further includes a communication module. The communication end of the signal processing module 12 is connected to the input end of the communication module, and the output end of the communication module is respectively connected to the first communication interface 5 and the second communication port 6. Both the first communication interface 5 and the second communication port 6 can be any communication interface such as an RS-485 communication interface or a USB interface, and its specific implementation method is not limited.

[0071] When the first communication interface 5 and the second communication port 6 are RS-485 communication interfaces, each pressure sensor can be assigned a unique address number. Through the RS-485 communication protocol, the control system can respectively access and read the data of each pressure sensor. This method not only facilitates centralized management of data, but also allows users to freely combine the number of sensors and the layout method according to actual needs to achieve more flexible applications.

[0072] When the power supply terminals of multiple pressure sensors are connected to the same power supply, and the first communication interface 5 or the second communication interface is connected to the input end of a controller, it belongs to a sensor network formed by connecting multiple pressure sensors in parallel. When the first communication interface 5 of the first pressure sensor is connected to the input end of the controller, the second communication interface of the first pressure sensor is connected to the first communication interface 5 of the second pressure sensor, and the second communication interface of the second pressure sensor is connected to the first communication interface 5 of the third pressure sensor 10, and is connected to the last pressure sensor in the same way. At this time, multiple pressure sensors are connected in series to form a sensor network.

[0073] On the basis described above, through holes for communication connection between the first communication interface 5 and the second communication port 6 are provided on the protective film 4 of the pressure sensor. And in order to increase the sealing performance, a sealing ring can be provided between the data line connected to the first communication interface 5 and the second communication port 6 and the through holes of the protective film 4.

[0074] In addition, in order to enable the pressure sensor to work for a long time, the control circuit board can also include a power module for supplying power to the signal processing unit. The power module can include a power supply circuit and a power supply interface connected to the input end of the power supply circuit. The power module can also include a power supply circuit and a battery connected to the input unit of the power supply circuit. Among them, the voltage input end of the power supply circuit is connected to the voltage input end of the signal processing module 12. The battery can be any one of dry batteries such as button batteries, or any one of rechargeable batteries such as lithium batteries and supercapacitors.

[0075] When the battery is a rechargeable battery, the power module can further include a charging circuit, and the output end of the charging circuit is connected to the rechargeable battery. In this way, the battery can be repeatedly charged.

[0076] In the pressure sensor provided by the present utility model, the pressure-sensitive unit 14 can be a pressure-sensitive resistor made of a pressure-sensitive material. In addition, in different application scenarios or detection precisions, the distance between two adjacent pressure-sensitive units 14 on the pressure sensor, the size and quantity of the pressure-sensitive units 14 can be adaptively adjusted, and the setting method is not unique.

[0077] In order to enable the signal processing module 12 to simultaneously sample the detection data of the induction module 13 and convert the sampled electrical signal into a pressure value, the signal processing module 12 can include a sampling circuit and a processor. The input end of the sampling circuit is connected to the output end of the induction module 13, the output end of the sampling circuit is connected to one input end of the processor, and a conversion program for converting the electrical signal into a pressure value is installed on the processor.

[0078] Among them, the sampling circuit can be any common circuit, which will not be elaborated in this embodiment. The processor can be but not limited to chips such as single-chip microcomputers, MCUs, DSPs, and FPGAs, which will not be elaborated in this embodiment either.

[0079] When the pressure sensor is applied to a mattress or a smart mattress, in order to comprehensively and accurately detect the pressure borne by the mattress, the pressure sensor 10 is in a long strip shape, and a plurality of pressure-sensitive units 14 are arranged at equal intervals along the length direction of the detection area. The size of the pressure-sensitive unit 14 is 5mm×5mm, and the distance between two adjacent pressure-sensitive units 14 is 68mm.

[0080] The length of the flexible circuit board 11 can be the same as the length or width of the object to be measured, and its specific length is not limited. For example, when the object to be measured is a single mattress, the length of the flexible circuit board 11 can be 700 mm and the width can be 6 mm. At this time, the pressure-sensitive unit 14 is connected to the 700-mm long and 6-mm wide flexible circuit board 11 through solder joints.

[0081] Based on the same inventive concept as the above-mentioned pressure sensor, an embodiment of the present utility model further provides an intelligent mattress, which includes a mattress body, a control system, and the pressure sensor provided above.

[0082] The pressure sensor is disposed in the mattress body, and the pressure sensor is communicatively connected to the control system.

[0083] The pressure sensor is used to measure the bearing value of the mattress body, and the control system is used to adjust the hardness of the mattress body. The hardness of the mattress body matches the bearing value.

[0084] For the structure and effect of the pressure sensor, reference can be made to the relevant descriptions above, which will not be elaborated here. Structures such as airbags can be provided on the mattress body. For example, the control system can adjust the air pressure of the airbags in each area of the intelligent mattress according to the bearing value to adjust the hardness of the intelligent mattress.

[0085] In order to be able to detect the pressure value borne by the intelligent mattress more comprehensively and accurately, the control system includes a controller. There are multiple pressure sensors, and the multiple pressure sensors are arranged at equal intervals in the mattress body, and the multiple pressure sensors are electrically connected to the controller to form a sensor network in the mattress body.

[0086] It should be understood that the setting direction of the pressure sensor is consistent with the width direction of the intelligent mattress, and with reference to Figure 6 , multiple pressure sensors 10 can be connected into a sensor network in series or in parallel.

[0087] In the above-mentioned intelligent mattress, by connecting an appropriate number of pressure sensors 10 in parallel and laying them in the intelligent mattress to cover the entire mattress area, the actual bearing value of the intelligent mattress can be obtained comprehensively and accurately. Thus, through the data analysis of each pressure sensor, it helps the intelligent mattress system to more accurately identify and respond to the user's sleep behavior, provide personalized sleep support for the user, and improve comfort and health.

[0088] The above solution provided by the embodiment of the present utility model can at least achieve the following technical effects:

[0089] (1) The pressure sensor is flexible, enabling the pressure sensor to adapt to and cover objects to be measured such as mattresses with different shapes and sizes, so as to be able to detect more accurately and comprehensively, greatly improving the accuracy of detection;

[0090] (2) The pressure sensor has the characteristics of high sensitivity, small size, fast response, etc., and can detect the tiny pressure changes on the intelligent mattress more accurately and comprehensively;

[0091] (3) It helps to more precisely adjust the hardness of the mattress according to the detection results of the pressure sensor, so as to improve the user's sleep quality and provide a healthier and more comfortable sleep environment for the user.

[0092] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pressure sensor, characterized in that: The flexible detection layer includes a flexible circuit board, a signal processing module and a sensing module, wherein the signal processing module is arranged in a safety area of ​​the flexible circuit board, and the sensing module is arranged in a detection area of ​​the flexible circuit board; The sensing module is electrically connected to the signal processing module; The sensing module includes a plurality of pressure-sensitive units, and the plurality of pressure-sensitive units are electrically connected in sequence; The sensing module is used to output a detection electrical signal to the signal processing module when the pressure-sensitive unit is in a pressure-bearing state, and the signal processing module is used to obtain a pressure value corresponding to the detection electrical signal.

2. The pressure sensor according to claim 1, characterized in that: The pressure sensor further includes a plurality of pressure-relieving components disposed on the flexible circuit board, the plurality of pressure-relieving components correspond one-to-one to the plurality of pressure-sensitive units, and each of the pressure-relieving components is close to the corresponding pressure-sensitive unit.

3. The pressure sensor according to claim 2, characterized in that: The pressure-relieving member includes at least two pressure-relieving strips, the pressure-relieving strips and the pressure-sensitive unit have the same thickness, and the pressure-sensitive unit is located between the two pressure-relieving strips.

4. The pressure sensor according to claim 2 or 3, characterized in that: The pressure sensor further comprises a flexible supporting layer, and the flexible detection layer is arranged on the flexible supporting layer.

5. The pressure sensor according to claim 4, characterized in that: The pressure sensor further comprises a hollow protective film, wherein the flexible detection layer, the pressure-relieving member and the flexible supporting layer are all located inside the protective film.

6. The pressure sensor according to claim 4, characterized in that: The flexible supporting layer is an elastic supporting plate, and a side of the flexible supporting layer away from the flexible detection layer is used to be close to a supporting surface of an application device.

7. The pressure sensor according to claim 4, characterized in that: The flexible detection layer also includes a first communication interface and a second communication port, and the first communication interface and the second communication port are both arranged in a safe area of ​​the flexible circuit board.

8. The pressure sensor according to claim 4, characterized in that: The pressure sensor is in the shape of a long strip, and a plurality of the pressure-sensitive units are arranged at equal intervals along the length direction of the detection area. The size of the pressure-sensitive unit is 5 mm×5 mm, and the distance between two adjacent pressure-sensitive units is 68 mm.

9. A smart mattress, characterized in that: It comprises a mattress body, a control system and a pressure sensor as claimed in any one of claims 1 to 8; The pressure sensor is disposed in the mattress body, and the pressure sensor is communicatively connected with the control system; The pressure sensor is used to measure the pressure bearing value of the mattress body, and the control system is used to adjust the hardness of the mattress body; the hardness of the mattress body matches the pressure bearing value.

10. The smart mattress according to claim 9, characterized in that: The control system includes a controller. There are multiple pressure sensors, which are evenly spaced and arranged in the mattress body. The multiple pressure sensors are electrically connected to the controller to form a sensor network in the mattress body.

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