Infrared thermal imaging temperature measuring core and infrared thermal imaging device

Abstract

The invention relates to the field of infrared thermal imaging, and discloses an infrared thermal imaging temperature measuring movement and infrared thermal imaging equipment, comprising: a shell, a fixing ring, a lens tube, an aperture, a shutter and a detector; the shell is provided with an opening, and the fixing ring is installed at the opening of the shell; the lens tube is connected to the shell through the fixing ring on the side facing the opening of the shell, and the lens tube abuts against the aperture on the side facing away from the opening of the shell; the aperture is installed on the shell and located between the lens tube and the shutter, and is used for filtering infrared light heat entering from the opening of the shell and passing through the lens tube; the shutter is installed on the shell and located between the aperture and the detector, and the shutter has an open state and a closed state, when the shutter is in the open state, the shutter allows infrared light heat to pass through; when the shutter is in the closed state, the shutter blocks infrared light heat from passing through; the detector is provided with a working area on the side facing the shutter, and is used for receiving infrared light heat passing through the shutter; the invention improves measurement stability and has high temperature measurement accuracy.

Description

Technical Field

[0001] The invention relates to the field of infrared thermal imaging technology, and in particular to an infrared thermal imaging temperature measuring core and an infrared thermal imaging device. Background Art

[0002] With the rapid development of science and technology, infrared thermal imaging equipment is used in various industries, and people have higher and higher requirements for the accuracy of infrared thermal imaging equipment. The working principle of infrared thermal imaging equipment is that the detector inside the movement uses photoelectric technology to detect the infrared signal of the thermal radiation of the object, converts the signal into an image, and displays the temperature value through calculation. Therefore, the equipment is greatly affected by the light flux and its own structural temperature when working. Therefore, it is necessary to design a high-precision infrared thermal imaging temperature measurement movement to ensure the temperature measurement accuracy of infrared thermal imaging equipment and reduce measurement errors. Summary of the invention

[0003] The invention discloses an infrared thermal imaging temperature measuring core and an infrared thermal imaging device, which are used to fix a lens tube in structure, and the heat of the lens tube itself will not affect a detector, and the infrared light heat entering the detector through the lens tube is complete and uniform, so that the measurement stability of the infrared thermal imaging device is improved and the temperature measurement accuracy is higher.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention provides an infrared thermal imaging temperature measuring core, comprising: a housing, a fixing ring, a lens tube, an aperture, a shutter and a detector;

[0006] The shell has an opening, and the fixing ring is installed at the opening of the shell;

[0007] The side of the lens tube facing the opening of the housing is connected to the housing through the fixing ring, and the side of the lens tube facing away from the opening of the housing is in contact with the aperture;

[0008] The aperture is mounted on the housing and located between the lens tube and the shutter, and is used to filter the infrared light heat that enters from the opening of the housing and passes through the lens tube;

[0009] The shutter is installed on the housing and is located between the aperture and the detector, and the shutter has an open state and a closed state. When the shutter is in the open state, the shutter allows the infrared light and heat to pass through; when the shutter is in the closed state, the shutter blocks the infrared light and heat from passing through;

[0010] The detector is provided with a working area on a side facing the shutter, for receiving the infrared light heat passing through the shutter.

[0011] In the above-mentioned infrared thermal imaging temperature measuring movement, the shell has an opening, the fixing ring is installed at the opening of the shell, and the lens tube, aperture, shutter and detector are all installed in the space surrounded by the fixing ring and the shell. Among them, the two ends of the lens tube are fixed by the fixing ring and the aperture respectively to prevent the lens tube from loosening and prevent the external excess heat from radiating to the detector through the lens tube itself; specifically, the fixing ring fixes the outside of the lens tube, that is, the end of the lens tube close to the shell opening, to prevent the lens tube from falling off to the outside; the aperture fixes the inside of the lens tube, that is, the end of the lens tube away from the shell opening, to prevent the lens tube from falling off to the inside. When in use, infrared light heat passes through the lens tube and radiates from the outside to the inside. The aperture is located between the lens tube and the shutter in structure, and the infrared light heat is filtered before entering the detector, so that the infrared light heat enters the detector completely and evenly. The shutter is located between the aperture and the detector in structure. The shutter is a device that can be mechanically closed and opened. In the closed state, it will block all infrared light heat, and in the open state, it allows the infrared light heat to pass through unimpeded and be received by the working area of ​​the detector facing the shutter side.

[0012] Therefore, the present invention aims to provide an infrared thermal imaging temperature measuring core, which is used to fix the lens tube in structure, so that the infrared light heat entering the detector through the lens tube is complete and uniform, so that the measurement stability of the infrared thermal imaging equipment is improved and the temperature measurement accuracy is higher.

[0013] Optionally, the fixing ring is clamped with the lens tube.

[0014] Optionally, a reflective layer is provided on a side of the aperture facing the lens tube, for reflecting stray light and gathering infrared light heat passing through the lens tube.

[0015] Optionally, a light absorbing layer is provided on a side of the aperture facing the shutter, for absorbing the heat of infrared light reflected by the detector and radiating it to the detector.

[0016] Optionally, the surface emissivity of the light absorbing layer is 1.

[0017] Optionally, the aperture is in the shape of a disc and only allows infrared light and heat to pass through.

[0018] Optionally, the housing is aluminum.

[0019] Optionally, the distance between the shutter and the aperture is 2.5 mm-3.5 mm.

[0020] Optionally, the distance between the shutter and the detector is 20 mm-30 mm.

[0021] The present invention also provides an infrared thermal imaging device, comprising any one of the above-mentioned infrared thermal imaging temperature measuring cores.

[0022] The infrared thermal imaging device has improved measurement stability and higher temperature measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A front view of an infrared thermal imaging temperature measurement core provided by an embodiment of the present invention;

[0024] Figure 2 A top view of an infrared thermal imaging temperature measurement core provided in an embodiment of the present invention.

[0025] In the figure: 1-housing; 2-fixing ring; 3-lens tube; 4-aperture; 5-shutter; 6-detector; 7-working area. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 to Figure 2 As shown, an embodiment of the present invention provides an infrared thermal imaging temperature measurement core, including: a housing 1, a fixing ring 2, a lens tube 3, an aperture 4, a shutter 5 and a detector 6;

[0028] The housing 1 has an opening, and the fixing ring 2 is installed at the opening of the housing 1;

[0029] The side of the lens tube 3 facing the opening of the housing 1 is connected to the housing 1 through the fixing ring 2, and the side of the lens tube 3 facing away from the opening of the housing 1 is in contact with the aperture 4;

[0030] The aperture 4 is installed on the housing 1 and is located between the lens tube 3 and the shutter 5, and is used to filter the infrared light heat that enters from the opening of the housing 1 and passes through the lens tube 3;

[0031] The shutter 5 is installed on the housing 1 and is located between the aperture 4 and the detector 6, and the shutter 5 has an open state and a closed state. When the shutter 5 is in the open state, the shutter 5 allows infrared light and heat to pass through; when the shutter 5 is in the closed state, the shutter 5 blocks the infrared light and heat from passing through;

[0032] The detector 6 is provided with a working area 7 on the side facing the shutter 5 for receiving infrared light heat passing through the shutter 5 .

[0033] In the above infrared thermal imaging temperature measuring movement, the housing 1 has an opening, the fixing ring 2 is installed at the opening of the housing 1, and the lens tube 3, the aperture 4, the shutter 5 and the detector 6 are all installed in the space surrounded by the fixing ring 2 and the housing 1. Among them, the two ends of the lens tube 3 are fixed by the fixing ring 2 and the aperture 4 respectively to prevent the lens tube 3 from loosening, and at the same time prevent the external excess heat from radiating to the detector 6 through the lens tube 3 itself; specifically, the fixing ring 2 fixes the outside of the lens tube 3, that is, the end of the lens tube 3 close to the opening of the housing 1, to prevent the lens tube 3 from falling off to the outside; the aperture 4 fixes the inside of the lens tube 3, that is, the end of the lens tube 3 away from the opening of the housing 1, to prevent the lens tube 3 from falling off to the inside. When in use, the infrared light heat passes through the lens tube 3 and radiates from the outside to the inside. The aperture 4 is structurally located between the lens tube 3 and the shutter 5, and the infrared light heat is filtered before entering the detector 6, so that the infrared light heat enters the detector 6 completely and evenly. The shutter 5 is structurally located between the aperture 4 and the detector 6. The shutter 5 is a device that can be mechanically closed and opened. In the closed state, it blocks all infrared light and heat. In the open state, it allows the infrared light and heat to pass through unimpeded and be received by the working area 7 of the detector 6 facing the shutter 5 side.

[0034] Therefore, an embodiment of the present invention aims to provide an infrared thermal imaging temperature measurement core, which is used to fix the lens tube 3 in structure, so that the infrared light heat entering the detector 6 through the lens tube 3 is complete and uniform, so that the measurement stability of the infrared thermal imaging equipment is improved and the temperature measurement accuracy is higher.

[0035] Optionally, the fixing ring 2 is clamped with the lens tube 3 .

[0036] In a specific embodiment, the fixing ring 2 is clamped with the housing 1. The fixing ring 2 is in the shape of a ring, and the outer side of the lens tube 3 is fixed to the fixing ring 2. The lens tube 3 is in the shape of a cylinder, the outer side is clamped with the lens tube 3, and the inner side is in contact with the aperture 4.

[0037] Optionally, a reflective layer is provided on the side of the aperture 4 facing the lens tube 3 , so as to reflect stray light and aggregate the heat of infrared light passing through the lens tube 3 .

[0038] In a specific embodiment, the aperture 4 is structurally located between the lens tube 3 and the shutter 5, and the infrared light and heat passing through the lens tube 3 are filtered before entering the detector 6, so that the light and heat uniformity is better, the light flux is complete, the reference temperature measurement is more accurate, and the measurement accuracy is improved. The outside of the aperture 4, that is, the side facing the lens tube 3, is provided with a white reflective layer formed by a reflective material, which can reflect stray light, aggregate infrared light and heat, and make the light flux uniform and complete.

[0039] It can be understood that the main function of the above-mentioned reflective layer is to reflect stray light and aggregate the infrared light heat passing through the lens tube 3. Therefore, any structure that can achieve the above-mentioned function can be the reflective layer referred to in this embodiment, for example, reflective paint or reflective coating applied to the surface of the aperture 4, or reflective film, etc.

[0040] Optionally, a light absorbing layer is provided on the side of the aperture 4 facing the shutter 5 , for absorbing the heat of the infrared light reflected by the detector 6 and radiating it to the detector 6 .

[0041] In a specific embodiment, a black light-absorbing layer is provided inside the aperture 4, i.e., on the side facing the shutter 5, which can better absorb the radiation heat of the detector 6 and radiate the heat to the detector 6 again, thereby preventing the loss of infrared light heat due to reflection of the detector 6.

[0042] It can be understood that the main function of the above-mentioned light-absorbing layer is to absorb the infrared light heat reflected by the detector 6 and radiate it to the detector 6. Therefore, any structure that can achieve the above-mentioned function can be the light-absorbing layer referred to in this embodiment, for example, a light-absorbing paint or light-absorbing film coated on the surface of the aperture 4.

[0043] Optionally, the surface emissivity of the light absorbing layer is 1.

[0044] Optionally, the aperture 4 is in a disc shape and only allows infrared light and heat to pass through.

[0045] In a specific embodiment, the aperture 4 is a metal disc. The metal material has good thermal conductivity, and the circular structure of the aperture 4 has better heat capacity uniformity, while increasing the stability of the measurement.

[0046] Optionally, the housing 1 is made of aluminum.

[0047] It should be noted that the outer shell 1 is made of metal aluminum at the outermost layer, which is strong, wear-resistant, corrosion-resistant and oxidation-resistant, and plays a role in protecting internal parts.

[0048] Optionally, the distance between the shutter 5 and the aperture 4 is 2.5 mm-3.5 mm.

[0049] It should be noted that the distance between the outside of the shutter 5 and the aperture 4 is very close, and specifically can be but is not limited to: 2.5 mm, 3.0 mm or 3.5 mm.

[0050] Optionally, the distance between the shutter 5 and the detector 6 is 20 mm-30 mm.

[0051] It should be noted that the distance between the interior of the shutter 5 and the detector 6 is relatively close, and specifically may be but is not limited to: 20 mm, 25 mm or 30 mm.

[0052] In the infrared thermal imaging temperature measuring movement provided by the embodiment of the present invention, the lens tube 3 is fixed by the fixing ring 2 in a snap-fit ​​manner on the outside and blocked by the aperture 4 on the inside. This fixing method avoids light leakage or incomplete infrared light and heat transmission due to loose screws caused by long-term use or shaking, and also prevents external excess heat from being radiated to the detector 6 through the lens tube 3 itself, thereby reducing the interference of the external environment on the measurement. At the same time, the aperture 4 absorbs the heat radiated by the detector 6 and radiates the heat to the detector 6 again, thereby preventing the loss of heat due to reflection of the detector 6 and reducing the measurement error; the aperture 4 is structurally located between the lens tube 3 and the shutter 5, and the light and heat are filtered before entering the detector 6, so that the light and heat uniformity is better, the light flux is complete, the reference temperature measurement is more accurate, and the measurement accuracy is improved. The circular structure of the aperture 4 has better heat capacity uniformity and increases the stability of the measurement; the structure is small and compact, suitable for various working environments, and the production cost is low, which is suitable for large-scale production.

[0053] The present invention also provides an infrared thermal imaging device, comprising any one of the above-mentioned infrared thermal imaging temperature measuring cores.

[0054] The infrared thermal imaging device has improved measurement stability and higher temperature measurement accuracy.

[0055] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An infrared thermal imaging temperature measurement core, characterized in that: include: Housing, retaining ring, lens tube, aperture, shutter and detector; The shell has an opening, and the fixing ring is installed at the opening of the shell; The lens tube, the aperture, the shutter and the detector are all installed in the space surrounded by the fixing ring and the housing; The side of the lens tube facing the opening of the housing is connected to the housing through the fixing ring, and the side of the lens tube facing away from the opening of the housing is in contact with the aperture; The aperture is mounted on the housing and located between the lens tube and the shutter, and is used to filter the infrared light heat that enters from the opening of the housing and passes through the lens tube; The shutter is installed on the housing and is located between the aperture and the detector, and the shutter has an open state and a closed state. When the shutter is in the open state, the shutter allows the infrared light and heat to pass through; when the shutter is in the closed state, the shutter blocks the infrared light and heat from passing through; The detector is provided with a working area on a side facing the shutter, for receiving the infrared light heat passing through the shutter.

2. The infrared thermal imaging temperature measurement core according to claim 1, characterized in that: The fixing ring is clamped with the lens tube.

3. The infrared thermal imaging temperature measurement core according to claim 1, characterized in that: A reflective layer is provided on the side of the aperture facing the lens tube, which is used to reflect stray light and aggregate the heat of infrared light passing through the lens tube.

4. The infrared thermal imaging temperature measurement core according to claim 1, characterized in that: A light absorbing layer is provided on the side of the aperture facing the shutter, which is used to absorb the infrared light heat reflected by the detector and radiate it to the detector.

5. The infrared thermal imaging temperature measurement core according to claim 4, characterized in that: The surface emissivity of the light absorbing layer is 1.

6. The infrared thermal imaging temperature measurement core according to claim 1, characterized in that: The aperture is in the shape of a disc and only allows infrared light and heat to pass through.

7. The infrared thermal imaging temperature measurement core according to claim 1, characterized in that: The housing is aluminum.

8. The infrared thermal imaging temperature measurement core according to claim 1, characterized in that: The distance between the shutter and the aperture is 2.5 mm-3.5 mm.

9. The infrared thermal imaging temperature measurement core according to claim 1, characterized in that: The distance between the shutter and the detector is 20 mm-30 mm.

10. An infrared thermal imaging device, characterized in that: It comprises an infrared thermal imaging temperature measuring core as described in any one of claims 1 to 9.

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