A flexible insulated temperature sensor

Abstract

The utility model discloses a kind of flexible insulation temperature sensors, it is related to temperature sensor field, including temperature sensing element, the temperature sensing element is array distribution, and temperature sensing element is connected by lead wire each other between, the temperature sensing element outer wall is equipped with flexible base layer, and flexible base layer outer wall is equipped with upper insulating layer and lower insulating layer, the temperature sensing element bottom is equipped with lug, lower insulating layer outer wall is equipped with heat dissipation hole, upper insulating layer and lower insulating layer between are equipped with sealing rubber ring.This kind of flexible insulation temperature sensor, can effectively isolate external electromagnetic interference, prevent temperature sensor element is influenced measurement accuracy by external electromagnetic interference, guarantee sensor performance stable, significantly improve the insulation performance and protection ability of sensor, heat dissipation hole can promptly emit the heat generated by temperature sensing element work, prevent measurement error due to heat accumulation, also conducive to prolong the service life of temperature sensing element.

Description

Technical Field

[0001] This utility model relates to the field of temperature sensor technology, specifically a flexible insulated temperature sensor. Background Technology

[0002] A temperature sensor is a device that can sense temperature and convert it into a usable output signal. With the continuous development of technology, temperature sensors have been widely used in many fields. In some special application scenarios, such as wearable devices and flexible electronic devices, higher requirements are placed on the flexibility and insulation performance of temperature sensors.

[0003] In the prior art, Chinese patent with publication number CN205940798U discloses a novel flexible temperature sensor, including: upper and lower substrates; electrodes placed on the substrates; the temperature-sensitive material between the electrodes is made of flexible substrates, the electrode material is made of metal or carbon powder, and the electrode processing method is screen printing. This allows for the large-scale mass production of such devices, and has advantages such as being able to be manufactured on a large scale and being able to measure the temperature of irregular surfaces.

[0004] For example, Chinese patent CN218916584U discloses a flexible temperature sensor, including: a base film; a sensing material electrode embedded in the base film; and an encapsulation layer; the sensing electrode material is a silver-gallium alloy, and the sensing electrode is almost completely embedded in the base film, which can better bond with the substrate, improve the mechanical performance and measurement stability of the flexible sensor. At the same time, this embedded substrate flexible temperature sensor has a simple structure and can be fabricated on a large scale at low cost.

[0005] Based on the above materials, existing temperature sensors suffer from signal interference due to poor insulation performance, or the bonding between the insulation layer and the sensing element is not tight enough, making it prone to delamination. This makes the sensing element easily damaged during bending or stretching, resulting in decreased measurement accuracy and affecting the stability and service life of the sensor. Therefore, we propose a flexible insulating temperature sensor. Utility Model Content

[0006] The purpose of this invention is to provide a flexible, insulated temperature sensor to solve the problems mentioned in the background art, such as poor insulation performance leading to signal interference, or insufficient bonding between the insulation layer and the sensing element, which easily causes delamination, making the sensing element easily damaged during bending or stretching, resulting in decreased measurement accuracy and affecting the stability and service life of the sensor.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a flexible insulating temperature sensor, comprising temperature sensing elements arranged in an array and interconnected by conductive lines, wherein the outer wall of the temperature sensing elements is provided with a flexible base layer, and the outer wall of the flexible base layer is provided with an upper insulating layer and a lower insulating layer, wherein the bottom of the temperature sensing elements is provided with a protrusion, and the outer wall of the lower insulating layer is provided with heat dissipation holes, and a sealing ring is provided between the upper insulating layer and the lower insulating layer.

[0008] Furthermore, the upper and lower insulating layers are sealed together by a sealing ring to form a sealed cavity, and the sensing element layer is located inside the sealed cavity.

[0009] Furthermore, both the upper and lower insulating layers are made of polyimide film to prevent the temperature sensor element from being affected by external electromagnetic interference.

[0010] Furthermore, the sealing ring is made of silicone rubber, and the side of the upper insulating layer that is attached to the sealing ring has rough particles to improve the adhesion between the upper insulating layer and the sealing ring.

[0011] Furthermore, the flexible base layer is located inside the sealing ring, and the flexible base layer wraps the temperature sensing element and the lead circuit. The flexible base layer is made of polyurethane elastic material, and Kevlar fibers are evenly distributed inside the flexible base layer to improve its tear resistance.

[0012] Furthermore, the bumps are arranged in a one-to-one correspondence with the temperature sensing elements, the heat dissipation holes have an L-shaped cross-section, and the two ends of the heat dissipation holes pass through the top of the bumps and the sidewall of the lower insulating layer, respectively.

[0013] Furthermore, the outer wall of the upper insulating layer is provided with a scratch-resistant and wear-resistant layer, and the scratch-resistant and wear-resistant layer is made of polytetrafluoroethylene, which is used to enhance the wear resistance of the upper insulating layer.

[0014] Furthermore, the outer wall of the lower insulating layer is provided with a self-adhesive layer, and the surface of the self-adhesive layer is covered with release paper for quick installation and fixation of the sensor body.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This flexible insulating temperature sensor uses polyimide film for the upper and lower insulating layers, combined with a silicone rubber sealing ring, to form a sealed cavity that encloses the temperature sensing element. This effectively isolates external electromagnetic interference, preventing the temperature sensing element from being affected by external electromagnetic interference and thus ensuring measurement accuracy. At the same time, the sealed structure prevents external moisture, dust, and other impurities from entering, ensuring stable sensor performance and significantly improving the sensor's insulation performance and protection capabilities. Furthermore, the rough particles on the side of the upper and lower insulating layers that adhere to the sealing ring increase the contact area with the sealing ring, improve adhesion, further enhance the sealing effect, and extend the sensor's service life.

[0017] 2. The flexible base layer on the outer wall of the temperature sensing element is made of polyurethane elastic material with Kevlar fibers evenly distributed inside. This not only gives the sensor good flexibility, enabling it to adapt to various complex curved surfaces and meet the usage requirements of special scenarios such as wearable devices, but also greatly improves the tear resistance of the flexible base layer, enhancing the protection of the temperature sensing element and the lead circuit.

[0018] 3. The protrusions at the bottom of the temperature sensing element and the heat dissipation holes on the outer wall of the lower insulating layer provide an efficient path for heat transfer while ensuring the structural strength of the sensor. This allows the heat generated by the temperature sensing element to be dissipated in a timely manner, preventing measurement errors caused by heat accumulation, ensuring stable and reliable measurement accuracy, and also helping to extend the service life of the temperature sensing element.

[0019] 4. The scratch-resistant and wear-resistant layer on the outer wall of the upper insulation layer is made of polytetrafluoroethylene, which can effectively resist external friction and scratches, protect the internal structure from damage, and improve the durability of the sensor. The self-adhesive layer design on the outer wall of the lower insulation layer is covered with release paper. When using it, you only need to peel off the release paper to quickly fix the sensor on the surface of different objects. The installation process is simple and convenient, which greatly expands the application range of the sensor, meets the needs of diverse application scenarios, and reduces installation costs and time costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the anti-scratch and wear-resistant layer structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of this utility model after removing the upper insulating layer and the flexible base layer;

[0024] Figure 5This is a schematic diagram of the heat dissipation hole structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the coarse particle structure of this utility model.

[0026] In the diagram: 1. Temperature sensing element; 2. Leading circuit; 3. Flexible base layer; 4. Upper insulation layer; 401. Scratch-resistant and wear-resistant layer; 5. Lower insulation layer; 501. Self-adhesive layer; 6. Sealing ring; 7. Protrusion; 8. Heat dissipation hole; 9. Rough particles. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In a further preferred embodiment of this utility model, such as Figure 1 - Figure 6 As shown, a flexible insulating temperature sensor includes temperature sensing elements 1 arranged in an array and interconnected via conductive lines 2. A flexible base layer 3 is provided on the outer wall of each temperature sensing element 1, and an upper insulating layer 4 and a lower insulating layer 5 are provided on the outer wall of the flexible base layer 3. A protrusion 7 is provided at the bottom of each temperature sensing element 1. Heat dissipation holes 8 are provided on the outer wall of the lower insulating layer 5. A sealing ring 6 is provided between the upper insulating layer 4 and the lower insulating layer 5, forming a sealed cavity. The sensing element layer is located within this sealed cavity. Both the upper insulating layer 4 and the lower insulating layer 5 are made of polyimide film to prevent external electromagnetic interference to the temperature sensing element. The sealing ring 6 is made of silicone rubber, and the upper insulating layer 4 and the lower insulating layer 5 are bonded to the sealing ring 6. One side has rough particles 9 to improve the adhesion between the flexible base layer 3 and the sealing ring 6. The flexible base layer 3 is located inside the sealing ring 6 and wraps the temperature sensing element 1 and the lead circuit 2. The flexible base layer 3 is made of polyurethane elastic material and has Kevlar fibers evenly distributed inside to improve its tear resistance. The protrusions 7 are set one-to-one with the temperature sensing element 1. The heat dissipation hole 8 has an L-shaped cross-section and the two ends of the heat dissipation hole 8 pass through the top of the protrusion 7 and the side wall of the lower insulation layer 5, respectively. The outer wall of the upper insulation layer 4 is provided with a scratch-resistant and wear-resistant layer 401, which is made of polytetrafluoroethylene to enhance the wear resistance of the upper insulation layer 4. The outer wall of the lower insulation layer 5 is provided with a self-adhesive layer 501, and the surface of the self-adhesive layer 501 is covered with release paper for quick installation and fixation of the sensor body.

[0029] During temperature measurement, the arrayed temperature sensing elements 1 serve as the core sensing components, directly contacting or sensing the thermal radiation of the object being measured. When the temperature of the object changes, the resistance value of the temperature sensing elements 1 changes accordingly. This change is transmitted to the external signal processing device through the connected lead circuit 2. The lead circuit 2 is wrapped in a flexible base layer 3. The flexible base layer 3 is made of polyurethane elastic material and has Kevlar fibers evenly distributed inside. It can provide flexible protection for the lead circuit 2, ensuring that the circuit is not damaged under bending, stretching and other conditions, and maintaining the stability of signal transmission. It can also buffer external stress and prevent the temperature sensing elements 1 from being damaged.

[0030] The upper insulating layer 4 and the lower insulating layer 5 are made of polyimide film, which together with the silicone rubber sealing ring 6 form a sealed cavity, completely enclosing the temperature sensing element 1 and the lead circuit 2. The good insulation performance and electromagnetic shielding ability of the polyimide film can effectively block external electromagnetic interference and avoid interference signals from affecting the output signal of the temperature sensing element 1, ensuring the accuracy of the measurement signal. The sealing ring 6, together with the rough particles 9 on the bonding surface of the upper and lower insulating layers 5, forms a tight sealing structure to prevent external moisture, dust and other impurities from entering the cavity, protecting the internal components from environmental factors and ensuring the long-term stable operation of the sensor.

[0031] When the temperature sensing element 1 is working, it generates heat. The protrusion 7 at its bottom and the L-shaped heat dissipation hole 8 on the outer wall of the lower insulating layer 5 work together to create an efficient channel for heat transfer. The protrusion 7 concentrates and guides the heat generated by the temperature sensing element 1 to the heat dissipation hole 8. The special structure of the L-shaped heat dissipation hole 8 enables the heat to be quickly conducted to the outside of the sensor and dissipated in time, avoiding the accumulation of heat inside the sensor and affecting the performance of the temperature sensing element 1, and ensuring stable and reliable measurement accuracy.

[0032] The scratch-resistant and wear-resistant layer 401 on the outer wall of the upper insulating layer 4 is made of polytetrafluoroethylene. During the use of the sensor, it can resist external friction and scratches, protect the upper insulating layer 4 and its internal structure from physical damage, and maintain the overall structural integrity and performance stability of the sensor. The self-adhesive layer 501 on the outer wall of the lower insulating layer 5 is covered with release paper. When in use, the release paper is removed, and the self-adhesive layer 501 can quickly stick and fix the sensor to the surface of different objects to meet diverse installation needs. After installation, it can ensure that the sensor is in close contact with the object being measured, ensuring the accuracy and effectiveness of temperature measurement.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flexible insulating temperature sensor, comprising temperature sensing elements (1), wherein the temperature sensing elements (1) are arranged in an array and interconnected by conductive lines (2), characterized in that: The temperature sensing element (1) has a flexible base layer (3) on its outer wall, and the flexible base layer (3) has an upper insulating layer (4) and a lower insulating layer (5) on its outer wall. The temperature sensing element (1) has a protrusion (7) at its bottom. The lower insulating layer (5) has a heat dissipation hole (8) on its outer wall. A sealing ring (6) is provided between the upper insulating layer (4) and the lower insulating layer (5).

2. The flexible insulated temperature sensor according to claim 1, characterized in that: The upper insulating layer (4) and the lower insulating layer (5) are sealed together by a sealing ring (6) to form a sealed cavity, and the sensing element layer is located in the sealed cavity.

3. The flexible insulated temperature sensor according to claim 1, characterized in that: Both the upper insulating layer (4) and the lower insulating layer (5) are made of polyimide film, which is used to prevent the temperature sensor element from being affected by external electromagnetic interference.

4. The flexible insulated temperature sensor according to claim 1, characterized in that: The sealing ring (6) is made of silicone rubber. The upper insulating layer (4) and the lower insulating layer (5) are attached to the sealing ring (6) with rough particles (9) on one side to improve the adhesion between them.

5. A flexible insulated temperature sensor according to claim 1, characterized in that: The flexible base layer (3) is located inside the sealing ring (6), and the flexible base layer (3) wraps the temperature sensing element (1) and the lead circuit (2). The flexible base layer (3) is made of polyurethane elastic material, and Kevlar fibers are evenly distributed inside the flexible base layer (3) to improve the tear resistance of the flexible base layer (3).

6. A flexible insulated temperature sensor according to claim 1, characterized in that: The bumps (7) are arranged in a one-to-one correspondence with the temperature sensing elements (1). The heat dissipation holes (8) have an L-shaped cross-section, and the two ends of the heat dissipation holes (8) pass through the top of the bumps (7) and the side wall of the lower insulating layer (5), respectively.

7. A flexible insulated temperature sensor according to claim 1, characterized in that: The outer wall of the upper insulating layer (4) is provided with a scratch-resistant and wear-resistant layer (401), and the scratch-resistant and wear-resistant layer (401) is made of polytetrafluoroethylene, which is used to enhance the wear resistance of the upper insulating layer (4).

8. A flexible insulated temperature sensor according to claim 1, characterized in that: The outer wall of the lower insulating layer (5) is provided with a self-adhesive layer (501), and the surface of the self-adhesive layer (501) is covered with release paper for quick installation and fixation of the sensor body.

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