Infrared thermopile sensor and surface temperature gun

Abstract

The utility model provides an infrared thermopile sensor and a surface temperature gun, the infrared thermopile sensor comprises a tube socket, an infrared temperature measurement chip and a tube cap, the infrared temperature measurement chip comprises a substrate arranged on the tube socket, the substrate is provided with a temperature measurement area and a circuit area surrounding the temperature measurement area, a plurality of thermopiles are arranged in the temperature measurement area in an array manner; the tube cap is arranged on the tube seat and covers the infrared temperature measurement chip, the tube cap is provided with a first opening, and the plurality of thermopiles receive external infrared radiation through the first opening. Through the infrared temperature measurement chip made of a plurality of thermopiles, higher temperature measurement precision can be realized after algorithm processing, specifically, the plurality of thermopiles can acquire a plurality of real-time temperature values, heat source image recognition is formed through algorithm average valuing and other processing, interference from other infrared heat sources except a human body is eliminated, and the accuracy of temperature measurement is improved. Therefore, the influence of environmental fluctuation is effectively reduced, and more comprehensive and accurate temperature data are obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared detection, in particular to an infrared thermopile sensor and a surface temperature gun. Background Art

[0002] Infrared thermopile sensor, as the core device of infrared thermometer, plays an indispensable role. The temperature of human body enters the infrared thermometer in the form of infrared radiation, which is received by the infrared thermopile sensor, and generates corresponding voltage signal output, which is then processed by the built-in MCU and displayed on the LCD screen.

[0003] In the existing technology, non-contact electronic thermometers are basically in the form of single-point infrared thermopile sensors. In order to ensure the accuracy of temperature measurement, the measurement distance needs to be close enough, which makes the temperature measurement coverage range smaller; at the same time, the temperature measurement data of the single-point infrared sensor is greatly affected by environmental fluctuations and will be interfered by infrared heat sources other than the human body, which will affect the temperature measurement precision and accuracy. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide an infrared thermopile sensor and a surface temperature gun to solve the technical problems mentioned in the above background technology.

[0005] On the one hand, the utility model provides an infrared thermopile sensor, comprising:

[0006] Pipe socket;

[0007] An infrared temperature measurement chip, the infrared temperature measurement chip comprising a substrate arranged on the tube seat, the substrate being provided with a temperature measurement area and a circuit area surrounding the temperature measurement area, wherein the temperature measurement area array is provided with a plurality of thermopiles;

[0008] A tube cap is arranged on the tube base and covers the infrared temperature measuring chip. The tube cap is provided with a first opening, and the plurality of thermopiles receive external infrared radiation through the first opening.

[0009] Furthermore, in the infrared thermopile sensor, the upper surface of the tube cap is concave to form a groove, and a convex lens is provided in the groove.

[0010] Furthermore, the infrared thermopile sensor further comprises an optical sleeve, wherein the optical sleeve is arranged on the tube seat and covers the tube cap and the convex lens, and the optical sleeve has a second opening corresponding to the central axis position of the convex lens.

[0011] Furthermore, in the infrared thermopile sensor, a projection area of ​​the second opening on the tube holder is equivalent to an area of ​​the temperature measurement region, and a diameter of the second opening is smaller than a diameter of the first opening.

[0012] Furthermore, in the infrared thermopile sensor, the upper surface of the optical sleeve is concave to form an infrared light limiting area.

[0013] Furthermore, in the infrared thermopile sensor, the infrared light limiting area is a conical or hemispherical cavity.

[0014] Furthermore, in the infrared thermopile sensor, a plurality of the thermopiles are arranged in an 8*8 rectangular array.

[0015] Furthermore, in the infrared thermopile sensor, an infrared filter is provided on a side of the first opening facing the infrared temperature measurement chip.

[0016] Furthermore, in the infrared thermopile sensor, an air cavity is formed between the optical sleeve, the tube cap and the convex lens.

[0017] On the other hand, the utility model also provides a surface temperature gun, comprising the infrared thermopile sensor described in the above technical solution.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The infrared temperature measurement chip made of multiple thermopiles can achieve higher temperature measurement accuracy after algorithm processing. Specifically, multiple thermopiles can obtain multiple real-time temperature values, and form heat source image recognition through algorithm averaging and other processing to eliminate interference from infrared heat sources other than the human body, thereby effectively reducing the impact of environmental fluctuations and obtaining more comprehensive and accurate temperature data. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the infrared thermopile sensor in the first embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the specific structure of the infrared temperature measurement chip in the first embodiment of the utility model;

[0022] Figure 3 This is an exploded view of a surface temperature gun in the second embodiment of the utility model;

[0023] Description of main component symbols:

[0024] 11. Tube socket; 12. Infrared temperature measurement chip; 121. Substrate; 122. Temperature measurement area; 123. Circuit area; 124. Thermopile; 13. Tube cap; 131. First opening; 141. Groove; 142. Convex lens; 15. Optical sleeve; 151. Second opening; 152. Infrared light limiting area; 16. Infrared filter; 101. Main body; 102. Handle part; 103. Temperature measurement button; 301. PCB board; 10. Infrared thermopile sensor; 302. Display component; 303. Power component.

[0025] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] See also Figure 1 and Figure 2 The infrared thermopile sensor 10 in the first embodiment of the utility model includes a tube holder 11 , an infrared temperature measuring chip 12 and a tube cap 13 .

[0030] The infrared temperature measurement chip 12 includes a substrate 121 disposed on the tube base 11, and a temperature measurement area 122 and a circuit area 123 surrounding the temperature measurement area 122 are provided on the substrate 121, wherein the temperature measurement area 122 is arrayed with a plurality of thermopiles 124, and the circuit area 123 is used for circuit arrangement;

[0031] The tube cap 13 is disposed on the tube base 11 and covers the infrared temperature measurement chip 12 . The tube cap 13 is provided with a first opening 131 , and the plurality of thermopiles receive external infrared radiation through the first opening 131 .

[0032] The infrared temperature measurement chip 12 made of multiple thermopiles can achieve higher temperature measurement accuracy after algorithm processing. Specifically, multiple thermopiles can obtain multiple real-time temperature values, and form heat source image recognition through algorithm averaging and other processing to eliminate interference from infrared heat sources other than the human body, thereby effectively reducing the impact of environmental fluctuations and obtaining more comprehensive and accurate temperature data.

[0033] See also Figure 1 The upper surface of the tube cap 13 is concavely formed with a groove 141, and a convex lens 142 is disposed in the groove 141. Exemplarily, the convex lens 142 is a silicon lens, which is beneficial to improving the convergence effect of thermal infrared waves of the expected wavelength, helping to increase the temperature measurement distance, thereby expanding the application scenarios of the infrared thermopile sensor 10.

[0034] Furthermore, an infrared filter 16 is provided on one side of the first opening 131 facing the infrared temperature measurement chip 12. In this embodiment, the infrared filter 16 is located below the convex lens 142. Therefore, the expected wavelength thermal radiation wave converged by the convex lens 142 will be finely filtered by the infrared filter 16 before reaching the surface of the infrared temperature measurement chip 12. The purpose of this design is to ensure that only infrared radiation that meets a specific wavelength range can penetrate the filter and then be received by the infrared temperature measurement chip 12.

[0035] See also Figure 1 The infrared thermopile sensor 10 also includes an optical sleeve 15, which is arranged on the tube seat 11 and covers the tube cap 13 and the convex lens 142. The optical sleeve 15 has a second opening 151 corresponding to the central axis of the convex lens 142. It can be understood that the optical sleeve 15 is used to fully cover and protect the tube cap 13 and the convex lens 142. This design not only ensures the structural integrity of the sensor, but also enhances its ability to resist external environments such as dust and water. In addition, an air cavity is formed between the optical sleeve 15, the tube cap 13 and the convex lens 142, which can effectively reduce thermal shock and ensure the accuracy of temperature measurement. The optical sleeve 15 has a second opening 151 at a position corresponding to the central axis of the convex lens 142.

[0036] Exemplarily, the projection area of ​​the second opening 151 on the tube holder 11 is equivalent to the area of ​​the temperature measurement area 122, and the diameter of the second opening 151 is smaller than the diameter of the first opening 131. It can be understood that the projection area of ​​the second opening 151 on the tube holder 11 is equivalent to the area of ​​the temperature measurement area 122, ensuring that only the infrared radiation of the target object can pass through the second opening 151 to reach the temperature measurement area 122, and can avoid the stray light emitted by non-target objects from entering as much as possible, which can significantly improve the accuracy and stability of the measurement. Secondly, the diameter of the first opening 131 is larger than the diameter of the second opening 151, so that the filtering area of ​​the infrared filter 16 is increased, which means that more light will be filtered through the infrared filter 16, thereby improving the filtering effect and temperature measurement accuracy.

[0037] In addition, it is worth mentioning that there is a certain gap between the second opening 151 and the convex lens 142, which provides fault tolerance for subsequent assembly and avoids collision with other components during assembly due to errors in actual processing dimensions.

[0038] Furthermore, the upper surface of the optical sleeve 15 is concave to form an infrared light limiting area 152. The infrared light limiting area 152 can be a conical cavity or a hemispherical cavity. By setting the infrared light limiting area 152, on the one hand, it can reduce the stray light from entering the convex lens 142. On the other hand, the infrared light limiting area 152 can also serve as an air layer, providing a certain heat insulation effect. The existence of the air layer also increases the heat dissipation area, which is conducive to the heat dissipation. In this way, even if the system temperature rises, the heat can be effectively dissipated through the infrared light limiting area 152 to maintain the stable operation of the system. In addition, a threaded design can be added to the infrared light limiting area 152, which has a better heat insulation and heat dissipation effect and can enhance the suppression of stray light.

[0039] See also Figure 2 In this embodiment, the plurality of thermopiles are arranged in a rectangular array of 8*8. The infrared temperature measurement chip 12 is made of 64 thermopiles, and higher temperature measurement accuracy can be achieved after algorithm processing; 64 real-time temperature values ​​can be obtained, and the heat source image recognition is formed by algorithm averaging and other processing to exclude temperature measurement interference of other animals. Of course, in other embodiments, the plurality of thermopiles can also be arranged in a rectangular array of 6*6 or 4*4. This embodiment is only an example and not a limitation.

[0040] In summary, the infrared thermopile sensor 10 in the above-mentioned embodiment of the utility model, through the infrared temperature measurement chip 12 made of multiple thermopiles, can achieve higher temperature measurement accuracy after algorithm processing. Specifically, the multiple thermopiles can obtain multiple real-time temperature values, and form heat source image recognition through algorithm averaging and other processing to eliminate interference from other infrared heat sources other than the human body, thereby effectively reducing the impact of environmental fluctuations and obtaining more comprehensive and accurate temperature data.

[0041] See also Figure 3 The second embodiment of the utility model further provides a surface temperature gun, including the infrared thermopile sensor 10 described in the above embodiment.

[0042] Specifically, the surface temperature gun includes a shell, and a temperature measuring component, a display component 302 and a power supply component 303 arranged in the shell.

[0043] The shell includes a left shell and a right shell that are arranged opposite to each other. Since the structures of the left shell and the right shell are similar, only the left shell part is described below, and the structure of the right shell can refer to the left shell.

[0044] The left housing includes a main body portion 101 and a handle portion 102 connected in one piece, a temperature measurement button 103 is provided at the junction of the main body portion 101 and the handle portion 102, the temperature measurement component is provided at the front end of the main body portion 101, the display component 302 is provided at the rear end of the main body portion 101, and the power supply component 303 is provided in the handle portion 102. The temperature measurement component includes a PCB board 301, and the infrared thermopile sensor 10 of the above embodiment is provided on the PCB board 301.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0046] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An infrared thermopile sensor, characterized in that: include: Pipe socket; An infrared temperature measurement chip, the infrared temperature measurement chip comprising a substrate arranged on the tube seat, the substrate being provided with a temperature measurement area and a circuit area surrounding the temperature measurement area, wherein the temperature measurement area array is provided with a plurality of thermopiles; A tube cap is arranged on the tube base and covers the infrared temperature measuring chip. The tube cap is provided with a first opening, and the plurality of thermopiles receive external infrared radiation through the first opening.

2. The infrared thermopile sensor according to claim 1, characterized in that: The upper surface of the tube cap is concave to form a groove, and a convex lens is arranged in the groove.

3. The infrared thermopile sensor according to claim 2, characterized in that: The infrared thermopile sensor further comprises an optical sleeve, which is arranged on the tube seat and covers the tube cap and the convex lens. The optical sleeve is provided with a second opening corresponding to the central axis position of the convex lens.

4. The infrared thermopile sensor according to claim 3, characterized in that: The projection area of ​​the second opening on the tube seat is equivalent to the area of ​​the temperature measurement area, and the diameter of the second opening is smaller than the diameter of the first opening.

5. The infrared thermopile sensor according to claim 3, characterized in that: The upper surface of the optical sleeve is concave to form an infrared light limiting area.

6. The infrared thermopile sensor according to claim 5, characterized in that: The infrared light limiting area is a conical or hemispherical cavity.

7. The infrared thermopile sensor according to claim 1, characterized in that: The plurality of thermopiles are arranged in an 8*8 rectangular array.

8. The infrared thermopile sensor according to claim 1, characterized in that: An infrared filter is provided on a side of the first opening facing the infrared temperature measurement chip.

9. The infrared thermopile sensor according to claim 3, characterized in that: An air cavity is formed between the optical sleeve, the tube cap and the convex lens.

10. A surface temperature gun, characterized in that: The invention comprises the infrared thermopile sensor according to any one of claims 1 to 9.

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