CN114383731A

CN114383731A - Infrared sensing module and forehead temperature measuring device

Info

Publication number: CN114383731A
Application number: CN202011125009.7A
Authority: CN
Inventors: 林增隆; 陈依伶; 古勤徽
Original assignee: Radiant Innovation Inc
Current assignee: Radiant Innovation Inc
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2022-04-22

Abstract

The invention discloses an infrared sensing module and a forehead temperature measuring device. The infrared sensing module comprises a light guide structure and an infrared sensing assembly. The light guide structure is internally provided with an annular hollow area which runs through the light guide structure, and a first opening and a second opening are respectively arranged on two opposite sides of the light guide structure. The aperture of the first opening is larger than that of the second opening. The annular hollow region comprises a light-eliminating region and a reflecting region. The dimming area has a plurality of serrations. Each serration extends from the first aperture to the second aperture. The plurality of saw-tooth portions are arranged in parallel with each other. The reflection region is formed between the second opening and the extinction region. The infrared sensing assembly is arranged at the second opening. The forehead temperature measuring device comprises a shell, a circuit board, an infrared sensing module and an operating switch. The infrared sensing module is arranged inside the shell.

Description

Infrared sensing module and forehead temperature measuring device

Technical Field

The present invention relates to an infrared sensing module and a forehead temperature measuring device, and more particularly, to an infrared sensing module and a forehead temperature measuring device with a light guide structure.

Background

First, in the prior art, when the infrared forehead thermometer is used to measure the body temperature of a human body, it is usually necessary to bring the forehead thermometer close to the center of the forehead by 1 to 3 cm (or even closer) to avoid measuring infrared energy outside the center of the forehead so as to accurately measure the body temperature of the human body, because the infrared sensing component adopted by the infrared forehead thermometer generally measures a viewing angle greater than 120 degrees. Therefore, when the infrared forehead thermometer is too far away from the human body, the infrared rays emitted from the center of the forehead of the human body enter the forehead thermometer, and the lower or higher infrared energy outside the center of the forehead can enter the forehead thermometer and be received by the infrared sensing assembly, so that the temperature value measured by the forehead thermometer is distorted.

When the infrared forehead thermometer is too far away from the forehead of the human body, even if infrared rays emitted from the center of the forehead of the human body enter the forehead thermometer, partial energy is possibly dissipated due to too long distance, and finally, signals formed by the infrared sensing assembly after receiving the infrared rays and being converted are too weak to be obviously separated from noise, so that the temperature value measured by the forehead thermometer is distorted.

Therefore, it is an important subject to be solved in the art to overcome the above-mentioned drawbacks by improving the optical structure design to shorten the measurement viewing angle of the forehead thermometer, to lengthen the distance, to filter out unnecessary external light, and to focus and amplify or at least maintain the energy of the infrared rays received by the infrared sensing module.

Disclosure of Invention

The present invention provides an infrared sensing module, which includes a light guide structure and an infrared sensing element. The light guide structure is internally provided with an annular hollow area which runs through the light guide structure, and a first opening and a second opening are respectively arranged on two opposite sides of the light guide structure. The aperture of the first opening is larger than that of the second opening. The annular hollow region comprises a light-eliminating region and a reflecting region. The dimming area has a plurality of serrations. Each sawtooth part extends from the first opening to the second opening. The reflection area is formed between the second opening and the extinction area. The infrared sensing assembly is arranged at the second opening.

Preferably, the length of the light extinction area is 1 to 3 times the length of the reflection area, and the inner diameter of the light extinction area is greater than or equal to the inner diameter of the reflection area.

Preferably, the surface of each serration is roughened.

Preferably, the surface of each serration is coated with a layer of black matting paint.

Preferably, the surface of the reflective region is parabolic.

Preferably, the surface of the reflective region is plated with a layer of nickel.

Preferably, the surface profile of the reflective area is a paraboloid, an isosceles trapezoid or an ellipsoid.

Preferably, the light guide structure includes a first light guide structure and a second light guide structure which are mutually connected, the extinction area is arranged in the first light guide structure, the first opening is arranged in the first light guide structure, the reflection area is arranged in the second light guide structure, and the second opening is arranged in the second light guide structure.

Preferably, the first light guide structure includes a third opening, the second light guide structure includes a fourth opening, the first light guide structure is connected with the fourth opening of the second light guide structure through the third opening, and the aperture of the third opening is greater than or equal to that of the fourth opening.

In order to solve the above technical problems, one of the technical solutions of the present invention is to provide a forehead temperature measuring device, which includes a housing, a circuit board, an infrared sensing module and an operation switch. The housing has an opening. The circuit board is arranged inside the shell. The infrared sensing module is arranged inside the shell and electrically connected with the circuit board, and the first opening of the infrared sensing module is arranged at the opening. The operating switch is arranged on the shell and electrically connected with the circuit board, and the operating switch is electrically connected with the infrared sensing module through the circuit board. The infrared sensing module comprises a light guide structure and an infrared sensing assembly. The light guide structure is internally provided with an annular hollow area which runs through the light guide structure, and a first opening and a second opening are respectively arranged on two opposite sides of the light guide structure. The aperture of the first opening is larger than that of the second opening. The annular hollow region comprises a light-eliminating region and a reflecting region. The dimming area has a plurality of serrations. Each sawtooth part extends from the first opening to the second opening. The reflection region is formed between the second opening and the extinction region. The infrared sensing assembly is arranged at the second opening.

Preferably, the surface of each serration is roughened.

Preferably, the surface of the reflective region is parabolic.

One of the advantages of the present invention is that the infrared sensing module and the forehead temperature measuring device provided by the present invention can include a light guide structure and an infrared sensing assembly through the infrared sensing module, an annular hollow region is formed inside the light guide structure, the annular hollow region penetrates through the light guide structure, and a first opening and a second opening are respectively formed at two opposite sides of the light guide structure, the aperture of the first opening is larger than that of the second opening, the annular hollow region includes a light extinction region and a reflection region, the light extinction region has a plurality of saw teeth, each saw tooth extends from the first opening to the second opening, and is arranged in parallel, the reflection region is formed between the second opening and the light extinction region, the infrared sensing assembly is disposed at the second opening, the forehead temperature measuring device includes a housing, a circuit board, an infrared sensing module, and an operation switch, The casing has the opening, infrared ray sensing module's first trompil sets up at the opening "," circuit board and infrared ray sensing module set up inside the casing "and" operating switch sets up at the casing, operating switch electric connection circuit board, and operating switch passes through the technical scheme of circuit board electric connection infrared ray sensing module ", can filter unnecessary external light under the measuring distance far away, and enlarge simultaneously or maintain the energy of the infrared ray that infrared ray sensing subassembly received at least, promote the accuracy of the human body temperature who surveys.

For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.

Drawings

Fig. 1 is a schematic perspective cross-sectional view of an infrared sensing module according to a first embodiment of the invention.

Fig. 2 is a schematic perspective view of a light guide structure of an infrared sensing module according to a first embodiment of the invention.

Fig. 3 is another perspective view of a light guide structure of an infrared sensing module according to a first embodiment of the invention.

Fig. 4 is a schematic cross-sectional view illustrating a light guide structure of an infrared sensing module according to a first embodiment of the invention.

Fig. 5 is a schematic perspective view of a light guide structure of an infrared sensing module according to a second embodiment of the invention.

Fig. 6 is another perspective view of a light guide structure of an infrared sensing module according to a second embodiment of the invention.

Fig. 7 is a schematic cross-sectional view illustrating a light guide structure of an infrared sensing module according to a second embodiment of the invention.

Fig. 8 is a perspective view of the forehead temperature measuring device of the present invention.

Fig. 9 is another perspective view of the forehead temperature measuring device of the present invention.

Fig. 10 is a schematic perspective cross-sectional view of a forehead temperature measuring device according to the present invention.

Detailed Description

The following description is provided for the embodiments of the present disclosure relating to the infrared sensing module and the forehead temperature measuring device, and those skilled in the art can understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modifications and various changes in detail, all without departing from the spirit and scope of the present invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used primarily to distinguish one element from another. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.

[ first embodiment ]

First, referring to fig. 1 to 4, a first embodiment of the present invention provides an infrared sensing module, which includes: a light guide structure 1 and an infrared sensing component 2. The light guide structure 1 is internally formed with an annular hollow region 10. The annular hollow region 10 penetrates through the light guide structure 1, and a first opening 101 and a second opening 102 are respectively formed on two opposite sides of the light guide structure 1. Note that the aperture of the first opening 101 is larger than that of the second opening 102.

Next, the light guide structure 1 will be specifically described. Referring to fig. 1 and 4, the annular hollow region 10 includes a light-eliminating region 103 and a reflecting region 104. The length L1 of the light extinction area 103 is 1 to 3 times the length L2 of the reflection area 104, and the inner diameter of the light extinction area 103 is greater than or equal to the inner diameter of the reflection area 104. The extinction area 103 has a plurality of serrations 105, and more specifically, the extinction area 103 has a plurality of serrations 105 connected peak to valley. Each serration 105 extends from the first bore 101 to the second bore 102. More specifically, the tip of each serration 105 extends from the first hole 101 to the second hole 102, i.e., along the axial direction of the annular hollow region 10. The surface of the serrated portion 105 is rough, and the surface of the serrated portion 105 may be coated with a layer of black matting paint. The reflective region 104 is formed between the second opening 102 and the light extinction region 103. The surface of the reflective region 104 is a parabolic mirror, and the surface of the reflective region 104 is plated with a layer of metal with high infrared reflectivity, such as nickel or gold, so that the surface of the reflective region 104 can reflect and focus infrared rays more.

The infrared sensing component 2 can be disposed in the second opening 102. The infrared sensing component 2 can receive the infrared rays emitted from the center of the forehead of a human body and then convert the infrared rays into signals capable of being displayed by temperature units. Therefore, when the infrared rays emitted from the center of the forehead of the human body enter the infrared sensing module M through the first opening 101, the infrared rays sequentially pass through the light-eliminating region 103 and the reflecting region 104, and are finally received by the infrared sensing element 2.

However, since the infrared sensing module does not directly contact the forehead of the human body, the light B (including infrared rays) outside the center of the forehead inevitably enters the infrared sensing module through the first opening 101. In detail, since the infrared sensing module is aligned to the center of the forehead of the human body for measurement, for two different light sources, i.e., the infrared ray emitted from the center of the forehead of the human body and the light ray B outside the center of the forehead, the angle from the first opening 101 to the infrared sensing module for the infrared ray emitted from the center of the forehead of the human body is smaller, and the angle from the first opening 101 to the infrared sensing module for the light ray B outside the center of the forehead is larger, as shown in fig. 1.

With continued reference to fig. 1, infrared rays (not shown) emitted from the center of the forehead of the human body enter the annular hollow region 10 in the light guide structure 1. Since the incident angle of the infrared rays emitted from the center of the forehead of the human body is small, the infrared rays do not contact the extinction area 103, but contact the reflection area 104, and are reflected (once or multiple times) by the surface of the reflection area 104 and focused into the infrared ray sensing assembly 2. As mentioned above, since the reflection area 104 is a smooth mirror surface or a smooth surface plated with bright nickel, the energy of the infrared rays emitted from the center of the forehead of the human body will not be lost when the infrared rays enter the surface of the reflection area 104 for reflection. Therefore, the infrared sensing assembly 2 can receive the infrared emitted from the center of the forehead of the human body and convert the infrared into a signal with strong enough intensity, and the signal is not covered by noise because the signal is too weak.

On the other hand, the light ray B outside the center of the forehead enters the annular hollow region 10 in the light guide structure 1 at a large angle, and thus contacts the sawtooth portion 105 of the extinction region 103 first. As described above, since the structure of the serration part 105 itself extends along the axial direction of the annular hollow region 10, and the surface of the serration part 105 is rough or coated with a layer of black matting paint, the external light B is continuously reflected between the surfaces of the serration parts 105 when contacting the serration part 105. The energy of the external light B continuously reflected between the surfaces of the plurality of sawteeth 105 is continuously lost and dissipated, and is not received by the infrared sensing assembly 2. Furthermore, since the length L1 of the extinction area 103 is 1 to 3 times the length L2 of the reflection area 104, the length of the reflection path of the light beam B outside the center of the forehead in the extinction area 103 can be ensured to be long enough, and the probability of the light beam B outside the center of the forehead being lost is increased.

In the present embodiment, the inner diameter of the light-eliminating region 103 is gradually narrowed inward (toward the reflecting region 104) by the first opening 101. In other words, the tooth tip lines of the plurality of serrations 105 form a tapered structure. In addition, in the embodiment, the surface profile of the reflection area 104 is a paraboloid and the infrared sensing element is located at the focus of the paraboloid, so that the infrared rays emitted by the human body can be reflected by the surface of the reflection area 104 to be further concentrated and received by the infrared sensing element 2, and the signal intensity of the converted temperature signal is further improved. In other words, compared with the prior art, the light guide structure 1 provided by the present invention can reduce the infrared energy outside the forehead center and focus on the infrared energy at a longer measurement distance to increase the forehead center.

[ second embodiment ]

Referring to fig. 5 to 7, fig. 5 to 7 show another embodiment of a light guide structure according to the present invention. The surface characteristics of the extinction region 103 and the reflection region 104 and the purposes of the extinction region 103 and the reflection region 104 in this embodiment are the same as those in the first embodiment, and are not described again. The biggest difference between this embodiment and the first embodiment is that the tooth tip lines of the plurality of saw tooth portions 105 form a cylindrical structure, and the surface profile of the reflective area 104 is an isosceles trapezoid line.

In addition, in this embodiment, the light guide structure 1 includes a first light guide structure 11 and a second light guide structure 12 that are connected to each other, the extinction area 103 is disposed inside the first light guide structure 11, the first opening is disposed in the first light guide structure 11, the reflection area is disposed inside the second light guide structure 12, and the second opening is disposed in the second light guide structure 12. The first light guiding structure 11 includes a third opening 111, the second light guiding structure 12 includes a fourth opening 121, the first light guiding structure 11 is connected to the fourth opening 121 of the second light guiding structure 12 through the third opening 111, and an aperture of the third opening 111 is greater than or equal to an aperture of the fourth opening 121.

In other words, the light guide structure 1 in the first embodiment is an integrally formed component, while in the second embodiment, the light guide structure 1 is a combined component formed by joining the first light guide structure 11 and the second light guide structure 12.

It should be noted that although the surface profile of the reflective region 104 in the first embodiment is a paraboloid, and the surface profile of the reflective region 104 in the second embodiment is an isosceles trapezoid line, the invention is not limited thereto. In other embodiments, the surface profile of the reflective region 104 may also be an ellipsoid.

Referring to fig. 1, 8 to 10, the present invention provides a forehead temperature measuring device Z, which includes: a housing 3, a circuit board 4, an operation switch 5, a display panel 6 and an infrared sensing module M of the present invention. The infrared sensing module M is disposed inside the housing 3. The infrared sensing module M is electrically connected to the circuit board 4. The infrared sensing module M includes a light guide structure 1 and an infrared sensing element 2.

The infrared sensing component 2 is electrically connected to the circuit board 4. The light guiding structure 1 has a connector 13, and the connector 13 is disposed on an outer surface of the light guiding structure 1. The light guide structure 1 of the present invention is connected to the fixing member 14 through the connecting member 13, and then fixed on the circuit board 4 through the fixing member 14. It should be noted that the type of the connecting element 13 and the manner of connecting it can also be implemented in other ways, and the above example is only one possible embodiment and is not intended to limit the present invention.

An annular hollow region 10 is formed inside the light guide structure 1, the annular hollow region 10 penetrates through the light guide structure 1, and a first opening 101 and a second opening 102 are respectively formed on two opposite sides of the light guide structure 1. The aperture of the first opening 101 is larger than the aperture of the second opening 102. The annular hollow region 10 includes a light-eliminating region 103 and a reflecting region 104. The extinction area 103 has a plurality of serrations 105, and more specifically, the extinction area 103 has a plurality of serrations 105 connected peak to valley. Each serration 105 extends from the first bore 101 to the second bore 102. The reflective region 104 is formed between the second opening 102 and the extinction region 103, and the infrared sensor assembly 2 is disposed in the second opening 102.

When the infrared sensing module M is disposed inside the housing 3, the first opening 101 is disposed at the opening 30. In other words, the first opening 10 and the opening 30 are overlapped, so that the infrared ray emitted from the center of the forehead or the light B outside the center of the forehead can enter the infrared sensing module M through the opening 30 (or the first opening 10) and be received by the infrared sensing element 2.

The operation switch 5 is disposed on the housing 3, and the operation switch 5 is electrically connected to the circuit board 4. The operation switch 5 is electrically connected to the infrared sensing module M through the circuit board 4. The display panel 6 is disposed on the housing 3, and the display panel 6 is electrically connected to the circuit board 4. The user starts and controls the infrared sensing module M to measure the infrared temperature by operating the switch 5, and the measured temperature value is displayed on the display panel 6 for the user to check.

Advantageous effects of the embodiments

One of the advantages of the present invention is that the infrared sensing module M and the forehead temperature measuring device Z provided by the present invention can be obtained by "the infrared sensing module M includes the light guide structure 1 and the infrared sensing element 2", and "the annular hollow region 10 is formed inside the light guide structure 1, the annular hollow region 10 penetrates through the light guide structure 1, and the first opening 101 and the second opening 102 are respectively opened at two opposite sides of the light guide structure 1, the aperture of the first opening 101 is larger than the aperture of the second opening 102", "the annular hollow region 10 includes the extinction region 103 and the reflection region 104", "the extinction region 103 has a plurality of saw tooth portions 105, each saw tooth portion 105 extends from the first opening 101 to the second opening 102, and are arranged in parallel, the reflection region 104 is formed between the second opening 102 and the extinction region 103, and" the infrared sensing element 2 is disposed at the second opening 102 ″, and the extinction region 102 ″ "forehead temperature measuring device Z includes casing 3, circuit board 4, infrared ray sensing module M and operating switch 5", "casing 3 has opening 30, infrared ray sensing module M's first trompil 101 sets up at opening 30", "circuit board 4 sets up at casing 3 inside with infrared ray sensing module M" and "operating switch 5 sets up at casing 3, operating switch 5 electric connection circuit board 4, and operating switch 5 passes through the technical scheme of circuit board 4 electric connection infrared ray sensing module M", in order to filter unnecessary external light, and enlarge or at least maintain the energy of the infrared ray that infrared ray sensing component received simultaneously, promote the accuracy of the human body temperature who surveys.

Furthermore, the external light B enters the infrared sensing module M of the present invention at a large angle, and the infrared rays emitted from the center of the forehead of the human body enter the infrared sensing module M of the present invention at a relatively small angle. Therefore, the invention utilizes the extinction area 103 in the light guide structure 1 to filter out the external light B with large angle, thereby improving the accuracy of the measured temperature. In addition, the invention utilizes the reflection area 104 in the light guide structure 1 to reflect the infrared rays emitted from the center of the forehead of the human body, so as to amplify or at least maintain the energy of the infrared rays emitted from the center of the forehead of the human body, so that the infrared rays emitted from the center of the forehead of the human body are not dissipated too much energy when being received by the infrared sensing assembly 2, and the converted temperature signal is too weak. In other words, compared with the prior art, the light guide structure 1 provided by the present invention can reduce the infrared energy outside the forehead center and focus on the infrared energy at a longer measurement distance to increase the forehead center.

The disclosure is only a preferred embodiment of the invention, and is not intended to limit the scope of the claims, so that all technical equivalents and modifications using the contents of the specification and drawings are included in the scope of the claims.

Claims

1. An infrared sensing module, comprising:

a light guide structure, wherein an annular hollow region is formed inside the light guide structure, the annular hollow region penetrates through the light guide structure, and a first opening and a second opening are respectively formed on two opposite sides of the light guide structure, the aperture of the first opening is larger than that of the second opening, the annular hollow region comprises a light extinction region and a reflection region, the light extinction region is provided with a plurality of sawtooth parts, each sawtooth part extends from the first opening to the second opening, and the reflection region is formed between the second opening and the light extinction region; and

an infrared sensing component is arranged at the second opening.

2. The infrared sensing module of claim 1, wherein the length of the light-attenuating region is 1 to 3 times the length of the reflecting region, and the inner diameter of the light-attenuating region is greater than or equal to the inner diameter of the reflecting region.

3. The infrared sensing module of claim 1, wherein the surface of each of the serrations is roughened.

4. The infrared sensing module of claim 1, wherein a surface of each of the serrations is coated with a layer of black matting paint.

5. The infrared sensing module of claim 1, wherein the surface of the reflective region is a parabolic mirror.

6. The infrared sensing module of claim 1, wherein the surface of the reflective region is plated with a layer of nickel.

7. The infrared sensing module of claim 1, wherein the surface profile of the reflective region is parabolic, isosceles trapezoidal, or elliptical.

8. The infrared sensing module as set forth in claim 1, wherein the light guide structure comprises a first light guide structure and a second light guide structure coupled to each other, the light-extinction region is disposed inside the first light guide structure, the first opening is disposed inside the first light guide structure, the reflection region is disposed inside the second light guide structure, and the second opening is disposed inside the second light guide structure.

9. The infrared sensing module of claim 8, wherein the first light guiding structure includes a third opening, the second light guiding structure includes a fourth opening, the first light guiding structure is connected to the fourth opening of the second light guiding structure through the third opening, and an aperture of the third opening is greater than or equal to an aperture of the fourth opening.

10. A forehead temperature measuring device, which is characterized by comprising:

a housing having an opening;

the circuit board is arranged inside the shell;

an infrared sensing module disposed inside the housing and electrically connected to the circuit board, the infrared sensing module comprises a light guide structure and an infrared sensing component, an annular hollow area is formed in the light guide structure and penetrates through the light guide structure, and a first opening and a second opening are respectively arranged on two opposite sides of the light guide structure, the aperture of the first opening is larger than that of the second opening, the annular hollow area comprises a light eliminating area and a reflecting area, the light-eliminating area is provided with a plurality of sawteeth, each sawteeth extends from the first opening to the second opening, the reflection region is formed between the second opening and the extinction region, the infrared sensing assembly is arranged in the second opening, and the first opening is arranged in the opening;

the operating switch is arranged on the shell and is electrically connected with the circuit board, and the operating switch is electrically connected with the infrared sensing module through the circuit board; and

and the display panel is arranged on the shell and is electrically connected with the circuit board.

11. The temperature measurement device according to claim 10, wherein the length of the light-eliminating zone is 1 to 3 times the length of the reflection zone, and an inner diameter of the light-eliminating zone is greater than or equal to the inner diameter of the reflection zone.

12. The temperature measurement device according to claim 10, wherein a surface of each of the serrations is a rough surface.

13. The temperature measurement device of claim 10, wherein a surface of each of the serrations is coated with a layer of black matt varnish.

14. The forehead temperature measurement device of claim 10, wherein the surface of the reflective region is a parabolic mirror.

15. The device of claim 10, wherein the surface of the reflective region is plated with a layer of nickel.

16. The temperature measuring device of claim 10, wherein the surface profile of the reflective region is parabolic, isosceles trapezoidal, or elliptical.