Infrared target device based on image dynamic displacement monitoring

Abstract

The utility model provides an infrared target device based on image dynamic displacement monitoring, which relates to the technical field of infrared targets and comprises an infrared lamp bead used for emitting infrared light. The shell is used for shielding visible light; the glass cover and the shell are assembled for use; the infrared lamp bead is fixed in the shell; the glass cover covers the shell; the infrared lamp beads face the glass cover; an antireflection film is arranged on the glass cover; a baffle with a black rough surface is also arranged in the shell; the black rough surface of the baffle faces the glass cover; the baffle is fixed with the shell; the position of the glass cover in the infrared target device is used as the front side of the infrared target device; the baffle is located on the rear side of the infrared lamp bead. The infrared target device based on image dynamic displacement monitoring provided by the utility model can solve the problem that infrared light emitted in the prior art can generate local change, and realizes the purposes of keeping the consistency of infrared light output, reducing the interference of visible light on infrared light detection and improving the accuracy of infrared light positioning.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared targets, in particular to an infrared target device based on image dynamic displacement monitoring. Background Art

[0002] In order to ensure that the geometry and stiffness of the bridge meet the design requirements, the geometric deformation test of key sections is required during the construction and use of the bridge. Since the traditional mechanical measurement method requires a lot of manpower and material resources, a new optical measurement method based on modern digital image analysis technology is introduced. It uses correlation calculation on the light intensity distribution map of the structure surface before and after deformation to measure the displacement of the structure.

[0003] The optical measurement method is mainly completed by the target installed on the bridge, the front-end sensing device for recording the target information and the back-end acquisition device for processing the information. Infrared target is a target commonly used in optical measurement methods. It emits infrared light through the internal lamp beads. The front-end sensing device monitors the infrared light for a long time to obtain the dynamic displacement process of the monitored bridge structure.

[0004] The Chinese patent application number 202310026741.6 discloses an infrared target device, which includes an array board and a heating unit; the heating unit is arranged in a dot matrix on the array board; the heating unit includes a lamp bead device; the patent emits infrared light outward through the heating unit, and at the same time sets a controller to control the power supply voltage of the heating unit, so that the temperature of the infrared target is uniform and consistent.

[0005] Image dynamic displacement monitoring is a process of capturing the dynamic displacement of a structure within a period of time through a camera equipped with an optical lens. The dynamic displacement of the structure is achieved by capturing the displacement of the target, and then using image matching technology and sub-pixel technology to obtain high-precision vibration displacement of the bridge structure. The dynamic vibration displacement time curve expressed in distance units is obtained through coordinate transformation. The infrared light emitted by the infrared target can be monitored and recorded by the front-end sensing device, that is, the camera. If this method is used and the infrared target provided in the above patent is used, since the infrared target will control the power supply voltage of the heating unit through the controller to make the temperature of the infrared target uniform and consistent, this process may cause local changes in the infrared light emitted by the infrared target, affecting the observation effect of the infrared light sensing device; at the same time, the patent arranges the heating unit in a dot matrix, which cannot effectively improve the accuracy of infrared light positioning. Utility Model Content

[0006] In response to the above-mentioned problems, the utility model provides an infrared target device based on image dynamic displacement monitoring, which can solve the problem that the infrared light emitted by the prior art will produce local changes, maintain the consistency of infrared light output, reduce the interference of visible light on the detection of infrared light, and improve the accuracy of infrared light positioning.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The utility model provides an infrared target device based on image dynamic displacement monitoring, comprising an infrared lamp bead for emitting infrared light; a shell for shielding visible light and a glass cover assembled with the shell; the infrared lamp bead is fixed inside the shell; the glass cover is covered on the shell; the infrared lamp bead faces the glass cover; an anti-reflection film is arranged on the glass cover;

[0009] A baffle with a black rough surface is also arranged inside the shell; the black rough surface of the baffle faces the glass cover; the baffle is fixed to the shell; the position of the glass cover in the infrared target device is used as the front side of the infrared target device; the baffle is located at the rear side of the infrared lamp bead.

[0010] The infrared target device based on image dynamic displacement monitoring provided by the utility model preferably also includes a lens for focusing infrared light; the lens is arranged between the infrared lamp bead and the glass cover; the center line of the lens coincides with the center line of the infrared lamp bead; the area of ​​the lens is larger than the cross-sectional area of ​​the infrared lamp bead; and the lens is fixed to the shell.

[0011] The infrared target device based on image dynamic displacement monitoring provided by the utility model preferably further includes a mounting bracket;

[0012] The mounting bracket includes a fixing member, a horizontal rotating member and a connecting rod for fixing to the bridge body;

[0013] The fixing member is connected to one end of the horizontal rotating member; the other end of the horizontal rotating member is hinged to one end of the connecting rod; and the other end of the connecting rod is hinged to the outer side of the shell.

[0014] In the infrared target device based on image dynamic displacement monitoring provided by the utility model, preferably, the horizontal rotating member includes a main body and a card body;

[0015] The main body is arranged vertically; the bottom of the main body is hinged to the connecting rod; the bottom of the card body is fixed to the top of the main body; an elastic annular protrusion is arranged on the outer side of the card body;

[0016] A card hole matching the card body is provided at the bottom of the fixing piece; the cross-sectional area of ​​the card hole gradually shrinks from the top to the bottom; the cross-sectional area at the top of the card hole is larger than the cross-sectional area of ​​the annular protrusion; the cross-sectional area at the bottom of the card hole is smaller than the cross-sectional area of ​​the annular protrusion; the card body is arranged in the card hole; the main body can extend into the card hole in the vertical direction; when the card body forms an interference fit in the card hole, the annular protrusion is in close contact with the card hole.

[0017] The above technical solution has the following advantages or beneficial effects:

[0018] The infrared target device based on image dynamic displacement monitoring provided by the utility model fixes the infrared lamp bead inside the shell, so that when the infrared lamp bead emits infrared light, the external visible light directly irradiates the infrared lamp bead, so as to reduce the interference to the sensing device in identifying the infrared light emitted by the infrared lamp bead 1; the infrared lamp bead is directed toward the glass cover, so that the glass cover covers the shell, when the infrared lamp bead emits infrared light, the infrared light can be transmitted through the glass to the infrared light sensing device for external monitoring due to the good light transmittance of the glass, and the infrared light emitted by the infrared lamp bead can be identified and monitored by the external infrared light sensing device; an anti-reflection film is arranged on the glass cover, so that when the visible light irradiates the glass cover, the glass cover The anti-reflection film arranged on the housing refracts part of the light, reducing the reflection of visible light on the glass cover, which affects the infrared light sensing device in identifying the infrared light. A baffle with a rough black surface is also arranged inside the housing, and the baffle is arranged around the infrared lamp beads, with the rough black surface of the baffle facing the glass cover. When visible light penetrates the glass cover and shines into the housing, in order not to affect the infrared light sensing device in monitoring the infrared light emitted by the infrared lamp beads, a background baffle with a rough black surface is arranged on the back side of the infrared lamp beads. When visible light is irradiated on the baffle, the black color can absorb most of the visible light, and at the same time the rough surface can reduce the reflective ability of the visible light, thereby reducing the interference of visible light on the infrared light. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, but the emphasis is on illustrating the subject matter of the present invention.

[0020] Figure 1 It is a structural schematic diagram of an infrared target device based on image dynamic displacement monitoring provided in Example 1 of the utility model.

[0021] Figure 2 It is a cross-sectional view of the interior of a shell in an infrared target device based on image dynamic displacement monitoring provided in Example 1 of the utility model.

[0022] Figure 3 It is a structural schematic diagram of a horizontal rotating part in an infrared target device based on image dynamic displacement monitoring provided in Example 1 of the utility model. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0024] Embodiment 1:

[0025] like Figures 1-2 As shown, an infrared target device based on image dynamic displacement monitoring provided by Embodiment 1 of the utility model includes an infrared lamp bead 1 for emitting infrared light; further includes a housing 21 for shielding visible light and a glass cover 22 for reducing visible light reflection; the infrared lamp bead 1 is fixed inside the housing 21; the glass cover 22 covers the housing 21; the infrared lamp bead 1 faces the glass cover 22; an anti-reflection film 221 is provided on the glass cover 22;

[0026] A baffle 3 with a black rough surface is also provided inside the shell 21; the black rough surface of the baffle 3 faces the glass cover 22; the baffle 3 is fixed to the shell 21; the position of the glass cover 22 in the infrared target device is used as the front side of the infrared target device; the baffle 3 is located at the rear side of the infrared lamp bead 1.

[0027] When using the infrared target device based on image dynamic displacement monitoring provided by Example 1 of the utility model, the infrared lamp bead 1 is connected to an external power supply so that the infrared lamp bead 1 emits infrared light outward, which is recognized and monitored by an external infrared light sensing device. After a long period of monitoring, the dynamic displacement process and data of the monitored bridge structure can be obtained; when sunlight shines on the infrared target, the shell 21 can block visible light, the anti-reflection film 221 on the glass cover 22 can refract part of the visible light, and the baffle 3 can absorb most of the visible light and reduce the reflection ability of visible light.

[0028] The infrared target device based on image dynamic displacement monitoring provided by Example 1 of the utility model fixes the infrared lamp bead 1 inside the shell 21, so that when the infrared lamp bead 1 emits infrared light, the external visible light directly irradiates the infrared lamp bead 1, so as to reduce the interference of the sensing device in identifying the infrared light emitted by the infrared lamp bead 1; the infrared lamp bead 1 is directed toward the glass cover 22, so that the glass cover 22 covers the shell 21, when the infrared lamp bead 1 emits infrared light, due to the good light transmittance of the glass, the infrared light can be transmitted through the glass to the infrared light sensing device for external monitoring, and the infrared light emitted by the infrared lamp bead 1 can be identified and monitored by the external infrared light sensing device; an anti-reflection film 221 is provided on the glass cover 22, so that the visible light can be transmitted to the infrared light sensing device for external monitoring when irradiating the glass cover. 22, the anti-reflection film 221 set on the glass cover 22 will refract part of the visible light, thereby reducing the reflection of visible light on the glass cover 22, which affects the infrared light sensing device in recognizing the infrared light; a baffle 3 with a black rough surface is also set inside the shell 21, and the black rough surface of the baffle 3 faces the glass cover 22. When the visible light penetrates the glass cover 22 and shines into the shell 21, in order not to affect the infrared light sensing device in monitoring the infrared light emitted by the infrared lamp bead 1, a background baffle 3 with a black rough surface is set on the rear side of the infrared lamp bead 1. When the visible light is irradiated on the baffle 3, the black color can absorb most of the visible light, and at the same time the rough surface can reduce the reflective ability of the visible light, thereby reducing the interference of the visible light on the infrared light.

[0029] like Figure 2 As shown, the infrared target device based on image dynamic displacement monitoring provided by Example 1 of the utility model preferably also includes a lens 4 for gathering infrared light. The lens 4 is fixed to the shell 21. The lens 4 is arranged between the infrared lamp bead 1 and the glass cover 22. The lens 4 can gather the infrared light emitted by the infrared lamp bead 1, so that the infrared light can be identified more clearly and accurately in the infrared light sensing device. At the same time, the anti-reflection film 221 on the glass cover 22 can eliminate stray light in the infrared light, so that the infrared light can be identified more accurately in the infrared light sensing device; the center line of the lens 4 is made to coincide with the center line of the infrared lamp bead 1, and the area of ​​the lens 4 is larger than the cross-sectional area of ​​the infrared lamp bead 1, so that most of the infrared light generated by the infrared lamp bead 1 is gathered to prevent the infrared light from being refracted through the lens 4, thereby reducing the accuracy of the infrared light.

[0030] like Figure 1 As shown, the infrared target device based on image dynamic displacement monitoring provided by Embodiment 1 of the present utility model, preferably, in order to facilitate the installation of the infrared target, the infrared target is also provided with a mounting bracket 5; the mounting bracket 5 includes a fixing member 51 for fixing to the bridge body, a horizontal rotating member 52 and a connecting rod 53;

[0031] When the infrared target is installed on the bridge body, the top of the fixing part 51 is fixed to the bridge body, the fixing part 51 is connected to one end of the horizontal rotating part 52, the other end of the horizontal rotating part 52 is hinged to one end of the connecting rod 53, and the other end of the connecting rod 53 is hinged to the outside of the shell 21. The direction of the infrared target can be adjusted through the horizontal rotating part 52, and the positional relationship between the connecting rod 53 and the horizontal rotating part 52, as well as the positional relationship between the connecting rod 53 and the shell 21, can make the external infrared light sensing device adapt to infrared targets at different angles.

[0032] like Figure 3 As shown, in the infrared target device based on image dynamic displacement monitoring provided by Embodiment 1 of the utility model, preferably, the horizontal rotating member 52 is provided with a main body 521 and a card body 522;

[0033] The main body 521 is vertically arranged; the bottom of the main body 521 is hinged to the connecting rod 53; the bottom of the card body 522 is fixed to the top of the main body 521; an elastic annular protrusion 5221 is arranged on the outer side of the card body 522; in order to adjust the direction of the infrared target in the horizontal direction, a card hole matching the card body 522 is opened at the bottom of the fixing member 51; the cross-sectional area of ​​the card hole gradually shrinks from the top to the bottom; the cross-sectional area of ​​the top of the card hole is larger than the cross-sectional area of ​​the annular protrusion 5221; the cross-sectional area of ​​the bottom of the card hole is smaller than the cross-sectional area of ​​the annular protrusion 5221;

[0034] When the card body 522 is disposed in the card hole, the main body 521 can extend into the card hole in the vertical direction. When the card body 522 forms an interference fit in the card hole, the annular protrusion 5221 is in close contact with the card hole.

[0035] When it is necessary to adjust the horizontal direction of the infrared target, it is necessary to lift up the horizontal rotating part 52 to make the annular protrusion 5221 out of the state of close contact with the card hole, so that the annular protrusion 5221 is inside the card hole, and adjust the direction of the shell 21 and the infrared lamp bead 1 inside it so that the infrared light emitted by the infrared lamp bead 1 can be recognized by the infrared light sensing device; after adjusting the horizontal direction of the infrared target, make the annular protrusion 5221 close to the card hole again.

[0036] To sum up, the infrared target device based on image dynamic displacement monitoring provided by the utility model can solve the problem that the infrared light emitted by the prior art will produce local changes, maintain the consistency of infrared light output, reduce the interference of visible light on the detection of infrared light, and improve the accuracy of infrared light positioning.

[0037] Those skilled in the art should understand that those skilled in the art can implement the above-mentioned variations by combining the prior art and the above-mentioned embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present utility model, and will not be described in detail here.

[0038] The above describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the utility model, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. An infrared target device based on image dynamic displacement monitoring, comprising an infrared lamp bead for emitting infrared light; characterized in that: It also includes a shell for shielding visible light and a glass cover assembled with the shell; the infrared lamp beads are fixed inside the shell; the glass cover is covered on the shell; the infrared lamp beads face the glass cover; and an anti-reflection film is provided on the glass cover; A baffle with a black rough surface is also arranged inside the shell; the black rough surface of the baffle faces the glass cover; the baffle is fixed to the shell; the position of the glass cover in the infrared target device is used as the front side of the infrared target device; the baffle is located at the rear side of the infrared lamp bead.

2. The infrared target device based on image dynamic displacement monitoring as claimed in claim 1, characterized in that: It also includes a lens for focusing infrared light; the lens is arranged between the infrared lamp bead and the glass cover; the center line of the lens coincides with the center line of the infrared lamp bead; the area of ​​the lens is larger than the cross-sectional area of ​​the infrared lamp bead; and the lens is fixed to the shell.

3. The infrared target device based on image dynamic displacement monitoring as claimed in claim 1, characterized in that: Also includes mounting brackets; The mounting bracket includes a fixing member, a horizontal rotating member and a connecting rod for fixing to the bridge body; The fixing member is connected to one end of the horizontal rotating member; the other end of the horizontal rotating member is hinged to one end of the connecting rod; and the other end of the connecting rod is hinged to the outer side of the shell.

4. The infrared target device based on image dynamic displacement monitoring as claimed in claim 3, characterized in that: The horizontal rotating member comprises a main body and a card body; The main body is arranged vertically; the bottom of the main body is hinged to the connecting rod; the bottom of the card body is fixed to the top of the main body; an elastic annular protrusion is arranged on the outer side of the card body; A card hole matching the card body is provided at the bottom of the fixing piece; the cross-sectional area of ​​the card hole gradually shrinks from the top to the bottom; the cross-sectional area at the top of the card hole is larger than the cross-sectional area of ​​the annular protrusion; the cross-sectional area at the bottom of the card hole is smaller than the cross-sectional area of ​​the annular protrusion; the card body is arranged in the card hole; the main body can extend into the card hole in the vertical direction; when the card body forms an interference fit in the card hole, the annular protrusion is in close contact with the card hole.

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