Economical double-colorimetric infrared temperature sensor

Abstract

The utility model discloses an economical double-colorimetric infrared temperature sensor which comprises an outer tube, a circuit board and a lens support are installed inside the outer tube, a front lens tube is installed in the middle of the lens support, a zoom cylinder is installed in front of the lens support, and a rear lens tube is installed behind the lens support. An optical fiber support, an infrared emission source, a signal receiving source, a first optical filter and a second optical filter are further installed on the lens support, the output end of the infrared emission source and the input end of the signal receiving source are both connected with the rear lens tube, and the connection part is wrapped by a black sleeve; according to the sensor, the infrared emission source, the signal receiving source and the two optical filters are installed on the lens support in a unified mode, installation parts in the sensor can be simplified and integrated so as to reduce the influence of assembly errors on the test precision, and the connection portions of the infrared emission source and the signal receiving source and the rear lens tube are wrapped by the black sleeves so that the test precision can be improved. Signal interference caused by light leakage can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared temperature sensors, in particular to an economical dual-colorimetric infrared temperature sensor. Background Art

[0002] The dual-colorimetric infrared temperature sensor is a temperature sensor that uses the ratio of the infrared radiation energy of two bands of adjacent channels to determine the temperature. It is widely used in smelting, casting, steel rolling, forging, powder metallurgy, chemical industry, glass processing, ceramics, medium-frequency induction heating, welding and other industries. The existing dual-colorimetric infrared temperature sensor lacks an integrated design of its internal structural components. The assembly errors brought about step by step during the installation process affect the test accuracy, and the internal optical path design has no blocking structure, which easily leads to light leakage from the light source and interferes with the signal receiving end.

[0003] To this end, we design an economical dual-colorimetric infrared temperature sensor here. Utility Model Content

[0004] The utility model aims to provide an economical dual-colorimetric infrared temperature sensor to solve the problems raised in the background technology in view of the deficiencies of the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an economical dual-colorimetric infrared temperature sensor, comprising an outer tube, a circuit board and a lens holder are installed inside the outer tube, a front lens tube is installed in the middle of the lens holder, a zoom barrel is installed in front of the lens holder, the front end of the zoom barrel is threadedly mounted with the zoom barrel outer tube, a lens is installed at the front end of the zoom barrel outer tube, a rear lens tube is installed behind the lens holder, an optical fiber holder, an infrared transmitting source, a signal receiving source, a first filter and a second filter are also installed on the lens holder, the optical fiber holder has an internal opening, and an optical fiber is plugged in the hole, the output end of the infrared transmitting source and the input end of the signal receiving source are both connected to the rear lens tube, and the connecting part is wrapped with a black sleeve.

[0006] Preferably, a bottom cover is threadedly mounted on the front end of the outer tube, the outer tube of the zoom tube passes through the bottom cover, a first top cover is threadedly mounted on the rear end of the outer tube, and a second top cover is mounted on the first top cover.

[0007] Preferably, the first filter and the second filter are both located between the front lens tube and the rear lens tube, the second filter is located in front of the first filter, and the front lens tube is perpendicular to the plane of the second filter, and the angle between the first filter and the second filter is about 45 degrees.

[0008] Preferably, a circular through hole is provided in the middle of the first top cover and the second top cover, a lens is installed between the first top cover and the second top cover, and a sealing ring is provided between the first top cover and the outer tube.

[0009] Preferably, sealing rings are provided between the bottom cover and the outer tube, and between the bottom cover and the outer tube of the zoom tube.

[0010] Compared with the prior art, the utility model provides an economical dual-colorimetric infrared temperature sensor, which has the following beneficial effects:

[0011] This economical dual-colorimetric infrared temperature sensor can simplify and integrate the installation components inside the sensor by uniformly installing the infrared emission source, signal receiving source and two filters on the lens bracket to reduce the impact of assembly errors on test accuracy. By wrapping the connection between the infrared emission source and the signal receiving source and the rear lens tube with a black sleeve, signal interference caused by light leakage can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a cross-sectional view of the bottom structure of the utility model;

[0014] Figure 3 It is a side structural sectional view of the utility model.

[0015] Figure numerals: 1, outer tube; 2, circuit board; 3, lens bracket; 4, zoom tube; 5, optical fiber bracket; 6, rear lens tube; 7, bottom cover; 8, zoom tube outer tube; 9, first top cover; 10, second top cover; 11, front lens tube; 12, infrared emission source; 13, signal receiving source; 14, first filter; 15, second filter. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-Figure 3In this embodiment: an economical dual-colorimetric infrared temperature sensor comprises an outer tube 1, a circuit board 2 and a lens holder 3 are installed inside the outer tube 1, a front lens tube 11 is installed in the middle of the lens holder 3, a zoom barrel 4 is installed in front of the lens holder 3, a zoom barrel outer tube 8 is installed at the front end of the zoom barrel 4 through a thread, a lens is installed at the front end of the zoom barrel outer tube 8, a rear lens tube 6 is installed behind the lens holder 3, and an optical fiber holder 5, an infrared emitting source 12, a signal receiving source 13, a first filter 14 and a second filter 15 are also installed on the lens holder 3. By installing the infrared emitting source 12, the signal receiving source 13, the first filter 14 and the second filter 15 on the lens holder 3, the installation components inside the sensor are arranged. Simplification and integration are performed to reduce the influence of assembly errors on test accuracy. The fiber optic bracket 5 has an internal opening, and an optical fiber is plugged in the hole. The output end of the infrared emission source 12 and the input end of the signal receiving source 13 are both connected to the rear lens tube 6, and the connecting part is wrapped with a black sleeve. The black sleeve can prevent signal interference caused by light leakage. The first filter 14 and the second filter 15 are both located between the front lens tube 11 and the rear lens tube 6. The second filter 15 is located in front of the first filter 14, and the front lens tube 11 is perpendicular to the mirror surface of the second filter 15. The angle between the first filter 14 and the second filter 15 is about 45 degrees. The first filter 14 and the second filter 15 are two monochromatic filters with very narrow bandwidths and different bandwidths.

[0018] See also Figure 1 A bottom cover 7 is threadedly mounted on the front end of the outer tube 1, and a zoom tube outer tube 8 passes through the bottom cover 7. A first top cover 9 is threadedly mounted on the rear end of the outer tube 1, and a second top cover 10 is mounted on the first top cover 9. Circular through holes are provided in the middle of the first top cover 9 and the second top cover 10. A lens is installed between the first top cover 9 and the second top cover 10. Sealing rings are provided between the first top cover 9 and the outer tube 1, and between the first top cover 9 and the lens. Sealing rings are provided between the bottom cover 7 and the outer tube 1, and between the bottom cover 7 and the zoom tube outer tube 8. By providing these sealing rings, water can be prevented from entering the interior of the sensor and causing damage to the internally installed components.

[0019] The working principle and use process of the utility model are as follows: the economical dual-colorimetric infrared temperature sensor collects radiation energy in two similar bands through the first filter 14 and the second filter 15, converts them into electrical signals and then compares them, and finally determines the temperature of the measured target based on the ratio. When assembling the sensor, the infrared emitting source 12, the signal receiving source 13, the first filter 14 and the second filter 15 are all installed and integrated on the lens bracket 3, so as to reduce the assembly error. The connection part between the infrared emitting source 12 and the signal receiving source 13 and the rear lens tube 6 is wrapped with a black sleeve to prevent light leakage from interfering with the signal.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An economical dual-colorimetric infrared temperature sensor, comprising an outer tube (1), characterized in that: A circuit board (2) and a lens holder (3) are installed inside the outer tube (1), a front lens tube (11) is installed in the middle of the lens holder (3), a zoom tube (4) is installed in front of the lens holder (3), a zoom tube outer tube (8) is installed at the front end of the zoom tube (4) via a thread, a lens is installed at the front end of the zoom tube outer tube (8), a rear lens tube (6) is installed at the rear of the lens holder (3), an optical fiber holder (5), an infrared emitting source (12), a signal receiving source (13), a first optical filter (14) and a second optical filter (15) are also installed on the lens holder (3), a hole is opened inside the optical fiber holder (5), and an optical fiber is plugged into the hole, an output end of the infrared emitting source (12) and an input end of the signal receiving source (13) are both connected to the rear lens tube (6), and the connecting parts are wrapped with a black sleeve.

2. The economical dual-color infrared temperature sensor according to claim 1, characterized in that: The front end of the outer tube (1) is threadedly mounted with a bottom cover (7), the zoom tube outer tube (8) passes through the bottom cover (7), the rear end of the outer tube (1) is threadedly mounted with a first top cover (9), and the first top cover (9) is mounted with a second top cover (10).

3. The economical dual-color infrared temperature sensor according to claim 1, characterized in that: The first optical filter (14) and the second optical filter (15) are both located between the front lens tube (11) and the rear lens tube (6); the second optical filter (15) is located in front of the first optical filter (14); the front lens tube (11) and the plane of the second optical filter (15) are perpendicular; and the angle between the first optical filter (14) and the second optical filter (15) is approximately 45 degrees.

4. The economical dual-color infrared temperature sensor according to claim 2, characterized in that: A circular through hole is provided in the middle of the first top cover (9) and the second top cover (10), a lens is installed between the first top cover (9) and the second top cover (10), and a sealing ring is provided between the first top cover (9) and the outer tube (1).

5. The economical dual-color infrared temperature sensor according to claim 2, characterized in that: Sealing rings are provided between the bottom cover (7) and the outer tube (1), and between the bottom cover (7) and the zoom tube outer tube (8).

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