CN217586114U

CN217586114U - Flexible pressure sensor

Info

Publication number: CN217586114U
Application number: CN202221456338.4U
Authority: CN
Inventors: 刘辉; 张通; 俞晓峰; 杨小牛
Original assignee: Huangpu Institute of Materials
Current assignee: Huangpu Institute of Materials
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-10-14
Anticipated expiration: 2032-06-10

Abstract

The utility model discloses a flexible pressure sensor, flexible pressure sensor includes: the sensor comprises a sensor shell, a sensor body, a detection assembly and a contact layer; the detection assembly and the sensor body are arranged in the sensor shell, the detection assembly and the sensor body are connected, the contact layer is arranged on the surface of the sensor shell and connected with the sensor body, and a plurality of contact points used for being in contact with a human body are arranged on the surface of the contact layer. The utility model discloses a be equipped with a plurality of bumps that can touch on the surface of sensor, through a plurality of bumps and user's contact and gather user's pressure, through a plurality of different bumps collection pressure, can avoid the condition of pressure dispersion and offset to improve the rate of accuracy that detects.

Description

Flexible pressure sensor

Technical Field

The utility model relates to a pressure sensor's technical field especially relates to a flexible pressure sensor.

Background

A Pressure Transducer is a device or apparatus that senses a Pressure signal and converts the Pressure signal into a usable output electrical signal according to a certain rule. The sensor is the most common sensor in industrial practice, is widely applied to various industrial automatic control environments, and relates to a plurality of industries such as water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical industry, oil wells, electric power, ships, machine tools, pipelines and the like.

The traditional pressure sensor is mainly a mechanical structure type device, and indicates pressure by deformation of an elastic element, but the number of related mechanical devices is large, so that the sensor is relatively large in submission, in order to reduce the size of the sensor, a detection assembly is arranged in the device of the traditional sensor, and when an object or a user touches the surface of the sensor, the pressure is converted into a weak electric signal through the detection assembly, so that the change of the tiny pressure is detected.

However, the existing sensor structure has the following technical problems: after the surface of the sensor is stressed, the pressure may be dispersed on the sensing surface or offset with the inside of the sensor, so that the detected signal strength is weaker, and the detection accuracy is further reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a flexible pressure sensor, flexible pressure sensor can set up a plurality of bumps at the contact surface, reduces the dispersion of pressure and offsets through the bump for built-in determine module can gather pressure more accurately, with the detection rate of accuracy that improves the sensor.

The utility model discloses the first aspect of the embodiment provides a flexible pressure sensor, flexible pressure sensor includes:

the sensor comprises a sensor shell, a sensor body, a detection assembly and a contact layer;

the detection assembly and the sensor body are arranged in the sensor shell and connected, the contact layer is arranged on the surface of the sensor shell and connected with the sensor body, and a plurality of contact points used for being in contact with a human body are arranged on the surface of the contact layer.

In a possible implementation manner of the first aspect, the contact layer includes: the connecting film, a plurality of contact surfaces and a plurality of contact bumps;

the contact surfaces are arranged on one surface of the connecting film, the contact bumps are arranged on the other surface of the connecting film, and each contact surface is matched with one contact bump up and down.

In one possible implementation manner of the first aspect, the connection film is a flexible film.

In a possible implementation manner of the first aspect, the contact bump is made of a silicone rubber.

In one possible implementation manner of the first aspect, the detecting component includes: the acquisition circuit, the analog-to-digital converter and the filter circuit master control processor are connected in sequence.

In a possible implementation manner of the first aspect, the method further includes: and the power supply is arranged in the sensor shell and is respectively connected with the sensor body and the detection assembly.

Compared with the prior art, the embodiment of the utility model provides a pair of flexible pressure sensor, its beneficial effect lies in: the utility model discloses a be equipped with a plurality of bumps that can touch on the surface of sensor, through a plurality of bumps and user's contact and gather user's pressure, through a plurality of different bumps collection pressure, can avoid the condition of pressure dispersion and offset to improve the rate of accuracy that detects.

Drawings

Fig. 1 is a schematic structural diagram of a flexible pressure sensor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram ii of a flexible pressure sensor according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram three of a flexible pressure sensor according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a flexible pressure sensor according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a contact layer according to an embodiment of the present invention;

fig. 6 is a schematic circuit diagram of an acquisition circuit according to an embodiment of the present invention;

in the figure: the sensor comprises a sensor shell 1, a sensor body 2, a detection assembly 3, a contact layer 4, a connecting film 41, a contact surface 42 and contact bumps 43.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In order to solve the above problems, a flexible pressure sensor provided by the embodiments of the present application will be described and explained in detail by the following specific embodiments.

Referring to fig. 1-5, respectively showing the utility model provides a flexible pressure sensor's structure schematic diagram one the utility model discloses a flexible pressure sensor's structure schematic diagram two that the embodiment provided the utility model discloses a flexible pressure sensor's structure schematic diagram three that the embodiment provided the utility model discloses a flexible pressure sensor's structure schematic diagram four that an embodiment provided and the utility model discloses a contact layer's structure schematic diagram that an embodiment provided.

Wherein, as an example, the flexible pressure sensor may include:

the flexible pressure sensor includes: the sensor comprises a sensor shell 1, a sensor body 2, a detection component 3 and a contact layer 4;

the detection assembly and the sensor body are arranged in the sensor shell, the detection assembly and the sensor body are connected, the contact layer is arranged on the surface of the sensor shell and connected with the sensor body, and a plurality of contact points used for being in contact with a human body are arranged on the surface of the contact layer.

The contact points can be uniformly arranged on the surface of the contact layer, and can also be arranged on the surface of the contact layer at different intervals. Optionally, the size or shape of each contact point can be adjusted according to actual needs.

In actual operation, a plurality of contact point on contact layer surface all can with the human contact of user, because user's skin can with a plurality of contact point contact, can let a plurality of contact points gather user's pressure simultaneously, transmit pressure to the determine module who connects again, supply determine module to carry out pressure calculation to avoid pressure to disperse on the surface of contact layer, also can avoid pressure and the inside mutual offset of sensor body, with the rate of accuracy that improves the detection.

Alternatively, the sensor body can be used for converting gravity signals into electrical signals, and the sensor body can be a static sensor such as a piezoresistive sensor, a pressure-capacitance sensor and the like, and is preferably a microstructure type flexible pressure sensor. The pressure conduction structure is combined, and the pressure conduction structure can be actually applied to corresponding parts of a body according to the characteristics of bones and skin of the whole body and the distribution position of blood vessels.

Referring to fig. 1-5, in one embodiment, the contact layer includes: a connection film 41, a plurality of contact surfaces 42 and a plurality of contact bumps 43;

the contact surface is arranged on one side of the connecting film, the contact bumps are arranged on the other side of the connecting film, and each contact surface is matched with one contact bump from top to bottom.

In this embodiment, each contact convex point corresponds to a contact surface, and the contact surface is connected with the sensor body again, and the pressure effect of gathering is in the sensor body, is transmitted to the determine module by the sensor body, supplies the determine pressure value of determine module.

Optionally, in order to improve the touch experience of the user, the contact bumps may adopt a cylindrical structure, forming bumps of a cylinder.

In order to reduce the manufacturing cost and make the contact bump more flexible, in an embodiment, the contact bump is made of silicon gel. Specifically, when contact bump and human skin laminating, contact bump receives skin pressure and passes through silica gel conduction pressure to every contact surface, and the contact surface can give the sensor body with pressure transmission again, realizes sensing signal's collection.

In one embodiment, the connecting film is a flexible film.

The utility model discloses a protruding structure of two-sided silica gel exposes the human skin of end direct contact, and every arch receives pressure alone to conduct the sensor body respectively alone. After the skin end receives pressure, because of the pressure variation in size of every point, the connection film in the middle of can produce deformation according to the pressure of every unit to conduct every sensor unit alone with pressure, the pressure signal of every independent unit is accurately gathered, thereby avoids leading to detecting the inaccurate condition because of surface dispersion or pressure and the inside mutual offset of sensor body.

Because the detection assembly and the sensor body all need the power consumption, in order to improve the utility model discloses a duration, refer to 1-5, the utility model discloses can also include: and the power supply is arranged in the sensor shell and is respectively connected with the sensor body and the detection assembly.

To accurately calculate the pressure value, in one embodiment, the detection assembly includes: the acquisition circuit, the analog-to-digital converter and the filter circuit are connected in sequence to control the processor.

In actual operation, the pressure value can be acquired by the acquisition circuit, digital-to-analog conversion is carried out on the pressure value through the analog-to-digital converter, then the converted data are filtered, and finally the pressure value is calculated by the main control processor.

Referring to fig. 6, a schematic circuit diagram of an acquisition circuit according to an embodiment of the present invention is shown.

In this embodiment, the acquisition circuit can be divided into 4 analog switches and one FPC connector; the 4 analog switches can be turned on in turn in a scanning mode, the magnitude of a partial pressure value on the sensor is collected, the partial pressure value is transmitted to the built-in main control processor, and finally, a heart rate value is displayed through an analog algorithm.

In an embodiment, the detection assembly may further include a communication circuit, the communication circuit may be connected to the main control processor, and the main control processor may communicate with the external device through the communication circuit after receiving the data acquired by the acquisition circuit.

The communication circuit can be replaced by a universal serial bus or wireless modes such as Bluetooth, WIFI, cellular communication or NFC, and each communication module or device is used for transmitting data processed by the main control processor to the upper computer or the mobile terminal.

The utility model discloses a pressure sensor can gather the pressure signal on each position skin surface, acquires the sensor signal under motion or the static condition to provide the treater and carry out data analysis, and then the analysis goes out the rhythm of the heart, and pulse pressure difference and heartbeat output relevant parameter, be used for health management and guide.

In this embodiment, the embodiment of the utility model provides a flexible pressure sensor is provided, its beneficial effect lies in: the utility model discloses a be equipped with a plurality of bumps that can touch on the surface of sensor, through a plurality of bumps and user's contact and gather user's pressure, through a plurality of different bumps collection pressure, can avoid the condition of pressure dispersion and offset to improve the rate of accuracy that detects.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A flexible pressure sensor, comprising: the sensor comprises a sensor shell, a sensor body, a detection assembly and a contact layer;

2. The flexible pressure sensor of claim 1, wherein the contact layer comprises: the connecting film, a plurality of contact surfaces and a plurality of contact bumps;

3. The flexible pressure sensor of claim 2, wherein the connecting membrane is a flexible membrane.

4. The flexible pressure sensor of claim 2 wherein the contact bump is formed of silicone.

5. The flexible pressure sensor of claim 1, wherein the detection assembly comprises: the acquisition circuit, the analog-to-digital converter and the filter circuit master control processor are connected in sequence.

6. The flexible pressure sensor of any of claims 1-5, further comprising: and the power supply is arranged in the sensor shell and is respectively connected with the sensor body and the detection assembly.