CN216746489U - Carbon base temperature sensor - Google Patents

Abstract

The utility model relates to a carbon-based temperature sensor which comprises a hollow shell, temperature-sensitive conductive fibers, a first lead, a second lead, a first conductive connecting piece and a second conductive connecting piece, wherein the temperature-sensitive conductive fibers, the first lead, the second lead, the first conductive connecting piece and the second conductive connecting piece are arranged in the hollow shell; the first end of the temperature-sensitive conductive fiber is connected with the first lead through the first conductive connecting piece, and the second end of the temperature-sensitive conductive fiber is connected with the second lead through the second conductive connecting piece. According to the utility model, the temperature-sensitive conductive fibers are arranged and are reasonably arranged in the hollow shell, so that the carbon-based temperature sensor is small in size and high in flexibility, the temperature inside animal and plant tissues can be detected, and the temperature-sensitive conductive fibers are made of carbon-based materials with negative temperature coefficients, so that the temperature measurement range and the temperature measurement accuracy can be further expanded.

Description

Carbon base temperature sensor

Technical Field

The utility model relates to the technical field of temperature sensor equipment, in particular to a carbon-based temperature sensor.

Background

A temperature sensor is a sensor that senses temperature and converts it into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument and has a plurality of varieties. The sensors mainly including PT100 and thermocouples are currently most widely used in the market, but most of them are rigid structures, are not easily bent, have an uncontrollable volume, and are difficult to use for temperature detection in a narrow space.

Especially in the biological field, the temperature distribution detection in animal and plant tissues requires that the flexibility of the temperature sensor is high, the diameter of the temperature sensor is small enough to enter the tissues in a minimally invasive manner for detection, and the wound left by the sensor leaving the object to be detected is small enough to reduce the influence on the appearance.

SUMMERY OF THE UTILITY MODEL

Accordingly, an object of the present invention is to provide a carbon-based temperature sensor which has a small diameter, a small volume, a high degree of flexibility, and a high sensitivity, and can detect the temperature of the inside of an animal or plant tissue.

The utility model provides a carbon-based temperature sensor, comprising: the temperature-sensitive heat-conducting fiber heat-conducting module comprises a hollow shell, and a temperature-sensitive conducting fiber, a first conducting wire, a second conducting wire, a first conducting connecting piece and a second conducting connecting piece which are arranged in the hollow shell, wherein a heat-conducting medium is filled in the hollow shell; the first end of the temperature-sensitive conductive fiber is connected with the first lead through the first conductive connecting piece, and the second end of the temperature-sensitive conductive fiber is connected with the second lead through the second conductive connecting piece.

The carbon-based temperature sensor disclosed by the utility model is small in size and high in flexibility, and can be used for detecting the temperature of animal and plant tissues.

Furthermore, the number of the temperature-sensitive conductive fibers is multiple, and the number of the first conductive connecting pieces and the number of the second conductive connecting pieces are correspondingly multiple; the first conducting wires are correspondingly multiple, and/or the second conducting wires are correspondingly multiple; the temperature-sensitive conductive fibers are sequentially arranged along the length direction of the hollow shell, the first end of each temperature-sensitive conductive fiber is connected with the first lead through the corresponding first conductive connecting piece, and the second end of each temperature-sensitive conductive fiber is connected with the corresponding second lead through the corresponding second conductive connecting piece.

Furthermore, the extending direction of the first ends to the second ends of the temperature-sensitive conductive fibers is the same as the length direction of the hollow shell.

Further, the diameter of the temperature-sensitive conductive fiber is less than 50 micrometers, the diameter of the first lead and the second lead is 20-200 micrometers, the outer diameter of the hollow shell is less than 1 millimeter, the inner diameter of the hollow shell is less than 0.5 millimeter, and the length of the temperature-sensitive conductive fiber, the first lead and the second lead is 1-500 millimeters.

Further, the temperature-sensitive conductive fiber is made of a negative temperature coefficient temperature-sensitive material, and the negative temperature coefficient temperature-sensitive material is made of a carbon-based material.

Further, the carbon-based material includes at least one of: polyacrylonitrile-based carbon fibers, pitch-based carbon fibers, viscose-based carbon fibers, phenolic-based carbon fibers, and vapor-grown carbon fibers.

Further, the first conductive connecting part and the second conductive connecting part are conductive materials, and the conductive materials comprise at least one of the following materials: solder, liquid metal, silver paste, carbon paste, conductive polymer.

Further, a heat conducting medium is filled in the hollow shell, and the heat conducting medium comprises at least one of the following components: air, silicone grease or oil.

Compared with the prior art, the utility model has the following technical effects:

1. according to the utility model, the first lead, the second lead and the temperature-sensitive conductive fibers with small diameters are arranged in the hollow shell, and the arrangement of the temperature-sensitive conductive fibers in the hollow shell is reasonably arranged, so that the temperature sensor has smaller volume and high flexibility, and is favorable for entering animal and plant tissues to measure temperature;

2. the temperature-sensitive conductive fiber is made of the carbon-based material with the negative temperature coefficient, the temperature measurement range and the temperature measurement accuracy can be further expanded, and the temperature measurement accuracy is further improved by arranging the heat-conducting medium in the hollow shell, so that the temperature-sensitive conductive fiber can be applied to temperature measurement in multiple fields.

3. The flexible temperature sensor has small diameter, can accurately measure the temperature distribution in the tissue in a minimally invasive mode, and does not influence the appearance of an object to be measured.

For a better understanding and practice, the utility model is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a carbon-based temperature sensor in accordance with an embodiment of the present invention;

FIG. 2 is a schematic diagram of a carbon-based temperature sensor in one embodiment of the utility model;

FIG. 3 is a schematic diagram of the internal structure of a carbon-based temperature sensor in one embodiment of the present invention;

FIG. 4 is a schematic diagram of an internal configuration of a carbon-based temperature sensor in accordance with an embodiment of the present invention;

FIG. 5 is a physical block diagram of a carbon-based temperature sensor in accordance with an embodiment of the present invention;

FIG. 6 is an enlarged block diagram of a carbon-based temperature sensor in accordance with an embodiment of the present invention;

FIG. 7 is a temperature-resistance graph of a carbon-based temperature sensor in an embodiment of the present invention.

Reference numerals: 10. a carbon-based temperature sensor; 11. a hollow housing; 12. a temperature-sensitive conductive fiber; 13. a first conductive line; 14. A second conductive line; 15. a first conductive connector; 16. a second conductive connection.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In order to realize the detection of the temperature distribution in the animal and plant tissues, and meet the requirements that the wound left by the sensor leaving the object to be detected is small enough, and the influence on the surface appearance of the animal and plant is reduced, the embodiment of the utility model provides the carbon-based sensor which has high flexibility and small diameter and can enter the animal and plant tissues for detection in a minimally invasive mode.

Referring to fig. 1, which is a schematic structural diagram of a carbon-based temperature sensor 10 according to an embodiment of the present invention, as shown in fig. 1, the carbon-based temperature sensor 10 includes a hollow housing 11, a temperature-sensitive conductive fiber 12, a first conductive wire 13, a second conductive wire 14, a first conductive connector 15, and a second conductive connector 16. The temperature-sensitive conductive fiber 12, the first lead 13, the second lead 14, the first conductive connecting piece 15 and the second conductive connecting piece 16 are all arranged in the hollow shell 11.

The first wire 13 is connected to a first end of the temperature sensitive conductive fiber 12 through a first conductive connecting member 15, and the second wire 14 is connected to a second end of the temperature sensitive conductive fiber 12 through a second conductive connecting member 16. The temperature-sensitive conductive fiber 12, the first lead 13, the second lead 14, the first conductive connecting piece 15 and the second conductive connecting piece 16 are not in contact with each other and the hollow shell 11. This is to prevent a short circuit or the like caused by contact between the conductive wires, thereby avoiding damage to the carbon-based temperature sensor 10.

In one embodiment, in particular, the hollow shell 11 is further filled with a heat conducting medium, the heat conducting medium can limit the positions of the temperature-sensitive conductive fibers 12, the first lead 13 and the second lead 14, and can also transmit the external temperature to the temperature-sensitive conductive fibers 12 in the hollow shell, and the temperature-sensitive conductive fibers 12 are in complete contact with the heat conducting medium, so that the temperature change of the animal and plant tissues is sensed. Wherein, the heat-conducting medium can be any one of the following: air, silicone grease or oil.

In the present embodiment, the hollow housing 11 is made of a flexible material, specifically, plastic, and the first and second wires 13 and 14 are made of a material having a conductive function, which may be a metal material, such as copper. The first conductive connection 15 and the second conductive connection 16 are conductive materials including at least one of: solder, liquid metal, silver paste, carbon paste, conductive polymer.

In one embodiment, the temperature-sensitive conductive fiber 12 is made of a negative temperature coefficient temperature-sensitive material, preferably, the negative temperature coefficient temperature-sensitive material is made of a carbon-based material. The negative temperature sensitive coefficient material has the characteristic that the resistance value is reduced along with the increase of the temperature, and the carbon fiber material has good flexibility and conductivity. Therefore, the temperature-sensitive conductive fiber 12 composed of the carbon-based material with the negative temperature sensitivity coefficient combines the characteristics of the two, not only has good flexibility and conductivity, but also further expands the temperature measurement range and the temperature measurement precision. In other embodiments, the temperature-sensitive conductive fiber 12 may also be made of other materials, such as temperature-sensitive paste.

Preferably, the carbon-based material comprises at least one of: polyacrylonitrile-based carbon fibers, pitch-based carbon fibers, viscose-based carbon fibers, phenolic-based carbon fibers, and vapor-grown carbon fibers.

When the carbon-based temperature sensor 10 measures temperature, a detection loop is formed by applying a potential difference between the first lead 13 and the second lead 14, and the change of a current signal of the detection loop caused by the change of resistance value generated by sensing the temperature change of the temperature-sensitive conductive fiber 12 is detected, so that the current change is converted into the temperature change.

Specifically, as shown in fig. 2, when the temperature of an animal or plant is detected, the carbon-based temperature sensor 10 is inserted into an internal tissue of the animal or plant, the other end of the first wire 13 is connected to the power supply terminal VCC, and the other end of the second wire 14 is connected to the temperature detection module, so that a potential difference is generated between the first wire 13 and the second wire 14 to form a detection loop, the temperature of the animal or plant is transmitted to the temperature-sensitive conductive fiber 12 through the heat-conducting medium, the temperature-sensitive conductive fiber 12 is in complete contact with the heat-conducting medium, the number of carriers of the temperature-sensitive conductive fiber 12 changes along with the change of the temperature of the heat-conducting medium, so that the temperature change is converted into an electrical signal, the electrical signal is transmitted to the temperature detection module through the second wire 14, and the temperature detection module can convert the electrical signal into a corresponding temperature signal, thereby detecting the temperature.

Preferably, in order to enable the carbon-based temperature sensor 10 to enter various animal and plant tissues and reduce damage caused by temperature measurement, the diameters of the temperature-sensitive conductive fiber 12, the first lead 13 and the second lead 14 are less than 50 micrometers, the outer diameter of the hollow shell 11 is less than 100 millimeters, and the inner diameter of the hollow shell 11 is less than 300 micrometers. In addition, in order to measure the temperature of the to-be-measured object at different positions according to the requirement, the lengths of the temperature-sensitive conductive fiber 12, the first lead 13 and the second lead 14 of the carbon-based temperature sensor 10 are 1-500 mm, so that the length required by measurement of various products can be met.

As shown in fig. 3, in order to enable the carbon-based temperature sensor 10 to perform gradient temperature measurement on animals and plants, in another embodiment, the number of the temperature-sensitive conductive fibers 12 of the carbon-based temperature sensor 10 is multiple, and the number of the second conductive wires 14, the first conductive connectors 15, and the second conductive connectors 16 is multiple corresponding to the temperature-sensitive conductive fibers 12. The temperature-sensitive conductive fibers 12 are sequentially arranged along the length direction of the hollow shell 11, a first end of each temperature-sensitive conductive fiber 12 is connected with the first lead 13 through a corresponding first conductive connecting piece, and a second end of each temperature-sensitive conductive fiber 12 is connected with the corresponding second lead 14 through a corresponding second conductive connecting piece. In other embodiments, the first conductive line 13 may be a corresponding plurality.

Preferably, the temperature-sensitive conductive fibers 12 are distributed at equal intervals inside the hollow shell 11. This mode of setting up makes the even distribution of temperature sensitive conductive fiber 12 at carbon back temperature sensor's detection position to can detect the temperature of different positions, and not only the temperature of a certain point, thereby realize the gradient and arrange the temperature measurement, and can guarantee that each temperature sensitive conductive fiber arranges in proper order and can not contact each other.

In a preferred embodiment, as shown in fig. 4, the first end to second end directions of the plurality of temperature-sensitive conductive fibers 12 are arranged along the length direction of the hollow housing 11, so that the directions of the temperature-sensitive conductive fibers 12 are uniform. When the temperature-sensitive conductive fibers 12 are consistent with the hollow shell 11 in the length direction, the number of the temperature-sensitive conductive fibers 12 can be reasonably set according to the length of the hollow shell 11, and compared with the arrangement that the length direction of the temperature-sensitive conductive fibers 12 is perpendicular to the length direction of the hollow shell 11, the layout is more reasonable, the temperature-sensitive conductive fibers can be lengthened, the diameter of the hollow shell 11 can be further reduced, and the diameter of the carbon-based temperature sensor 10 can be further reduced.

In a specific embodiment, as shown in fig. 5-6, which are physical diagrams of a carbon-based temperature sensor in an embodiment of the present invention, it can be seen that the outer diameter of the hollow casing is about 835 microns, the first conductive wire and the second conductive wire are copper wires, the diameter of the copper wires is about 111 microns, and as shown in fig. 6, the diameter of the temperature-sensitive conductive fibers is about 8 microns. As shown in fig. 7, which is a graph of temperature versus resistance in the carbon-based temperature sensors of the examples of fig. 5-6, it can be seen that the resistance of the carbon-based temperature sensor of the embodiment of the present invention gradually decreases as the temperature increases. The temperature-sensitive conductive fiber provided by the embodiment of the utility model has a very small diameter, but the resistance-temperature change trend is obvious, and the temperature sensitivity of the temperature-sensitive conductive fiber is not influenced even if the diameter of the temperature-sensitive conductive fiber is reduced. Therefore, the temperature of the animal and plant tissues can be accurately and effectively measured after entering the animal and plant tissues in a minimally invasive mode.

According to the carbon-based temperature sensor 10, the temperature-sensitive conductive fibers 12 with small diameters, the first lead 13 and the second lead 14 are arranged in the hollow shell 11, so that the diameter and the volume of the temperature sensor are smaller, the temperature sensor can enter animal and plant tissues to measure temperature, the temperature distribution in the tissues can be accurately measured in a minimally invasive mode, and the appearance of an object to be measured are not influenced. And the lengths of the temperature-sensitive conductive fiber 12, the first lead 13 and the second lead 14 can be adjusted according to requirements, so that the temperatures of different positions can be detected. The temperature-sensitive conductive fiber 12 also has good flexibility, so that the flexibility of the carbon-based temperature sensor 10 is increased and the carbon-based temperature sensor is easy to bend. The temperature-sensitive conductive fiber 12 is made of a negative temperature coefficient temperature-sensitive material, and the resistance of the material is reduced along with the temperature rise, so that the temperature detection range is expanded, and the temperature-sensitive conductive fiber can be applied to temperature measurement in multiple fields.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (7)

1. A carbon-based temperature sensor, comprising:

the temperature-sensitive heat-conducting fiber heat-conducting module comprises a hollow shell, and a temperature-sensitive conducting fiber, a first conducting wire, a second conducting wire, a first conducting connecting piece and a second conducting connecting piece which are arranged in the hollow shell, wherein a heat-conducting medium is filled in the hollow shell;

the first end of the temperature-sensitive conductive fiber is connected with the first lead through the first conductive connecting piece, and the second end of the temperature-sensitive conductive fiber is connected with the second lead through the second conductive connecting piece;

the diameter of the temperature-sensitive conductive fiber is less than 50 micrometers, the diameter of the first lead and the diameter of the second lead are 20-200 micrometers, the outer diameter of the hollow shell is less than 1 millimeter, the inner diameter of the hollow shell is less than 0.5 millimeter, and the length of the temperature-sensitive conductive fiber, the length of the first lead and the length of the second lead are 1-500 millimeters.

2. A carbon-based temperature sensor according to claim 1, wherein:

the number of the temperature-sensitive conductive fibers is multiple, and the number of the first conductive connecting pieces and the number of the second conductive connecting pieces are correspondingly multiple; the first conducting wires are correspondingly multiple, and/or the second conducting wires are correspondingly multiple;

the temperature-sensitive conductive fibers are sequentially arranged along the length direction of the hollow shell, the first end of each temperature-sensitive conductive fiber is connected with the first lead through the corresponding first conductive connecting piece, and the second end of each temperature-sensitive conductive fiber is connected with the corresponding second lead through the corresponding second conductive connecting piece.

3. A carbon-based temperature sensor according to claim 2, wherein:

the extending direction from the first end to the second end of the temperature-sensitive conductive fibers is the same as the length direction of the hollow shell.

4. A carbon-based temperature sensor according to claim 1, wherein:

the temperature-sensitive conductive fiber is made of a temperature-sensitive material with a negative temperature coefficient, and the temperature-sensitive material with the negative temperature coefficient is made of a carbon-based material.

5. A carbon-based temperature sensor according to claim 4, wherein:

the carbon-based material includes at least one of:

polyacrylonitrile-based carbon fibers, pitch-based carbon fibers, viscose-based carbon fibers, phenolic-based carbon fibers, and vapor-grown carbon fibers.

6. A carbon-based temperature sensor according to claim 5, wherein:

the first conductive connecting piece and the second conductive connecting piece are made of conductive materials, and the conductive materials comprise at least one of the following materials: solder, liquid metal, silver paste, carbon paste, conductive polymer.

7. A carbon-based temperature sensor according to claim 1, wherein:

the heat transfer medium includes at least one of: air, silicone grease or oil.

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