CN211668645U

CN211668645U - Thermopile infrared sensor device

Info

Publication number: CN211668645U
Application number: CN201922189058.6U
Authority: CN
Inventors: 何江
Original assignee: Coltan Smart Tech Co ltd
Current assignee: Coltan Smart Tech Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-10-13
Anticipated expiration: 2029-12-09

Abstract

The utility model relates to a thermopile infrared sensor device, which comprises a thermopile infrared sensor unit; the thermopile infrared sensor unit comprises a shell and a thermopile infrared sensor arranged in the shell; the thermopile infrared sensor includes a detection window communicating with the outside. The thermopile infrared sensor device further comprises a light-gathering cup arranged on the shell and arranged at the detection window, wherein the light-gathering cup comprises a reflection layer arranged on the inner wall surface of the light-gathering cup, and the reflection layer is arranged towards the direction of the infrared light source. The to-be-solved technical problem of the utility model specifies a thermopile infrared sensor device, has advantages such as sensing signal is strong, sensitivity is high, the degree of accuracy is high, can remote detection.

Description

Thermopile infrared sensor device

Technical Field

The utility model relates to an infrared sensor, more specifically say, relate to a thermopile infrared sensor device.

Background

The thermopile infrared sensor is a device which utilizes the Seeback effect principle of a thermocouple and rapidly measures temperature by receiving radiation or other infrared light, so that the thermopile infrared sensor is widely applied to scenes of measuring the body temperature of a human body, the environmental temperature of a laboratory, the environmental temperature of a precise instrument and the like. The existing infrared thermopile sensor with a single sensing chip is mainly applied and has the advantages of small size, portability and quick measurement, but because the angle of a window for receiving infrared rays is small, the infrared thermopile sensor can only detect parallel light which is just opposite to the window generally, and signals are weak, so that the infrared thermopile sensor can only detect temperature at a very short distance and obtain relatively accurate measurement results, and particularly, the infrared thermopile sensor has very weak signals for detecting a long-distance human body. Therefore, it is highly desirable to develop a remote measurement that requires a closer measurement to obtain more accurate measurement results.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, a modified thermopile infrared sensor device is provided.

The utility model provides a technical scheme that its technical problem adopted is: provided is a thermopile infrared sensor device including a thermopile infrared sensor unit; the thermopile infrared sensor unit comprises a shell and a thermopile infrared sensor arranged in the shell; the thermopile infrared sensor includes a detection window communicating with the outside. The thermopile infrared sensor device further comprises a light-gathering cup arranged on the shell and arranged at the detection window, wherein the light-gathering cup comprises a reflection layer arranged on the inner wall surface of the light-gathering cup, and the reflection layer is arranged towards the direction of the infrared light source.

In some embodiments, the light collection cup further comprises a first open end connected to the housing, and a second open end disposed opposite the first open end and facing the infrared light source, the second open end having a cross-sectional area greater than the cross-sectional area of the first open end.

In some embodiments, the longitudinal cross section of the light collecting cup is an isosceles trapezoid, the long side of the isosceles trapezoid is the second opening end, the short side of the isosceles trapezoid is the connecting end, and the inner wall surface of the two equal sides of the isosceles trapezoid is the surface where the reflecting layer is located.

In some embodiments, the light collection cup material is aluminum.

In some embodiments, the thermopile infrared sensor unit is cylindrical.

In some embodiments, the housing is cylindrical, and the volume of the housing is equivalent to the volume of the thermopile infrared sensor.

In some embodiments, the hot spot stack infrared sensor device further comprises a lens disposed on the second open end for increasing the angle at which the infrared light is received by the reflective layer of the light collection cup.

In some embodiments, the lens is a fresnel lens or a fish-eye lens.

In some embodiments, the lens material is a silicon wafer or high density polyethylene.

In some embodiments, the lens is located directly above the open end.

Has the advantages that: the utility model discloses a set up the spotlight cup that can increase the receipt infrared light source angle on thermopile infrared sensor unit, make the infrared light of all directions can collect in the sensitization unit (detection window) of this thermopile infrared sensor unit to realize bigger sensitization angle, thereby strengthen its sensing signal, and finally improve its inspection sensitivity and the degree of accuracy.

Drawings

The present invention will be further explained with reference to the accompanying drawings and embodiments:

fig. 1 is a schematic cross-sectional view of a thermopile infrared sensor apparatus in some examples of the present invention;

FIG. 2 is a schematic diagram of the thermopile infrared sensor apparatus shown in FIG. 1 receiving collimated infrared light;

FIG. 3 is a schematic diagram of the thermopile infrared sensor apparatus shown in FIG. 1 receiving refracted infrared light;

fig. 4 is a schematic cross-sectional view of a thermopile infrared sensor apparatus according to some embodiments of the present invention receiving infrared light.

Detailed Description

For a clearer understanding of the technical features, objects, and effects of the present invention, reference will now be made to the accompanying drawings.

Fig. 1 and 3 illustrate a thermopile infrared sensor apparatus 1 according to some embodiments of the present invention, which may include a thermopile infrared sensor unit 10, a light-focusing cup 20 disposed on the thermopile infrared sensor unit 10, and a pin 40; the thermopile sensor unit 10 is used for temperature detection, and the light-focusing cup 20 is used for increasing the detection window 11 of the thermopile sensor unit 10 for receiving infrared light, thereby further increasing the detection sensitivity of the thermopile infrared sensor apparatus 1. Pin 40 includes a lead-out to the thermopile

The thermopile infrared sensor unit 11 may include a case 11, and an infrared thermopile sensor 12 disposed within the case 11; the housing 11 is generally made of a metal material, such as copper, for keeping the thermopile infrared sensor 12 at a constant temperature, which is not interfered by the flow of ambient air, and the metal housing 11 also has a shielding function for reducing the interference of electromagnetic field. The thermopile infrared sensor 12 is for receiving infrared light to detect temperature.

The housing 11 may have a cylindrical shape having a volume substantially corresponding to the volume of the thermopile infrared sensor 12 so that the thermopile infrared sensor 12 is accommodated in the housing 11. The housing 11 may include a third open end 112 and a connecting end 114 opposite to the open end, the third open end 112 being a position of the detecting window 120 of the thermopile infrared sensor 12; the connection end 114 is used for connecting the thermopile infrared sensor 12 with the pin 40. The thermopile infrared sensor 12 is generally cylindrical and may include a detection window 120 located at the third open end 112 of the housing 11 and oriented toward the infrared light source.

The collection cup 20 may include a reflective layer 21, a second open end 22, and a first open end 23 disposed opposite the second open end 22. The reflective layer 21 is located at the inner side of the light-gathering cup and is used for receiving and reflecting infrared light to increase the detection visual angle of the detection window 120. The first open end 23 is disposed on the third open end 112 of the housing 11 and houses the detection window 120. The second open end 22 is arranged towards the outside environment, i.e. towards the infrared light or the light source with infrared light.

In some embodiments, the light-gathering cup 20 has an isosceles trapezoid shape in longitudinal cross section, wherein the long side of the isosceles trapezoid is the position of the second open end 22, and the short side of the isosceles trapezoid is the position of the first open end 23. The reflecting layer 21 of the condenser cup 20 is provided on the inner wall surface of the plane where the two isosceles sides of the isosceles trapezoid are located.

In some embodiments, the collection cup 20 is made of an aluminum material. When the light gathering cup 20 and the first opening end 23 of the shell 11 are installed in a tight fit mode, the specific heat capacity of the thermopile infrared sensor unit 10 can be increased, so that the influence of environmental changes on the sensor is reduced, and the stability of the thermopile is improved.

Fig. 4 shows the thermopile infrared sensor apparatus 1 in some embodiments, which further includes a lens 30 disposed on the second open end 22 of the light-gathering cup 20, and the lens 30 can further increase the detection viewing angle, i.e. the range of the received light source is enlarged, so that the thermopile infrared sensor apparatus 1 can have a larger angle and a stronger signal, thereby further improving the detection sensitivity. Even when the thermopile infrared sensor device 1 is relatively far away from the detected person or object, the accuracy and sensitivity of the thermopile infrared sensor device 1 are hardly affected. Preferably, the lens 30 is disposed directly above the open end 23 toward the infrared light source.

The utility model discloses a thermopile infrared sensor device 1 adopts detection window 120 department at thermopile infrared sensor unit 10 to set up spotlight cup 20 to increase the angle of the acceptance infrared light of detection window 120, thereby increase the light source visual angle, and consequently strengthen this thermopile infrared sensor device 1 and detect the sensitivity of time measuring, and can test in the distance of far away, and influence the test result. Further, set up lens 30 on this spotlight cup 20, increase the light source visual angle once more, and then the scope of increase received light source to make this thermopile infrared sensor device 1's signal stronger, can be in relative more distance, make the temperature value that records and actual difference in temperature littleer.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and implement the present invention accordingly, which can not limit the protection scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. A thermopile infrared sensor device comprising a thermopile infrared sensor unit (10); the thermopile infrared sensor unit (10) comprises a shell (11) and a thermopile infrared sensor (12) arranged in the shell; the thermopile infrared sensor (12) comprises a detection window (120) communicated with the outside, and is characterized in that the thermopile infrared sensor device further comprises a light-gathering cup (20) arranged on the shell (11) and arranged at the position of the detection window (120), the light-gathering cup (20) comprises a reflection layer (21) arranged on the inner wall surface of the light-gathering cup (20), and the reflection layer (21) is arranged towards the direction of an infrared light source.

2. The thermopile infrared sensor device according to claim 1, wherein the light collection cup (20) further comprises a first open end (23) connected to the housing (11), and a second open end (22) disposed opposite the first open end (23) and facing the infrared light source, the second open end (22) having a cross-sectional area greater than that of the first open end (23).

3. The thermopile infrared sensor device according to claim 2, wherein the longitudinal cross-section of the light-gathering cup (20) is an isosceles trapezoid, the position of the long side of the isosceles trapezoid is the second open end (22), the position of the short side of the isosceles trapezoid is the connecting end (114), and the inner wall surface of the two equal-waist sides of the isosceles trapezoid is the surface on which the reflecting layer (21) is located.

4. The thermopile infrared sensor device according to claim 2, characterized in that the light collection cup (20) material is aluminum.

5. Thermopile infrared sensor device according to claim 1, characterized in that the thermopile infrared sensor unit (10) is cylindrical.

6. The thermopile infrared sensor device according to claim 5, characterized in that the housing (11) is cylindrical, the volume of the housing (11) being comparable to the volume of the thermopile infrared sensor (12).

7. The thermopile infrared sensor device according to any one of claims 1 to 6, further comprising a lens disposed on the second open end (22) for increasing the angle at which the reflective layer (21) of the light collection cup (20) accepts infrared light.

8. The thermopile infrared sensor device of claim 7, wherein the lens is a Fresnel lens or a fisheye lens.

9. The thermopile infrared sensor device of claim 7, wherein the lens material is a silicon wafer or high density polyethylene.

10. Thermopile infrared sensor device according to claim 9, characterized in that the lens (30) is arranged directly above the second open end (22) towards the infrared light source.