WO2021258741A1

WO2021258741A1 - Infrared excitation imaging apparatus

Info

Publication number: WO2021258741A1
Application number: PCT/CN2021/075348
Authority: WO
Inventors: 罗北
Original assignee: 深圳市中钞科信金融科技有限公司
Priority date: 2020-06-22
Filing date: 2021-02-04
Publication date: 2021-12-30
Also published as: CN111479077B; CN111479077A

Abstract

Disclosed is an infrared excitation imaging apparatus, comprising a photographed object, wherein the photographed object is provided with infrared excitation ink; light emitted by an infrared excitation light source irradiates the infrared excitation ink; an infrared excitation imaging lens is provided on an industrial camera; the infrared excitation imaging lens faces the infrared excitation ink; and an infrared cut-off filter is provided in a light path between the infrared excitation imaging lens and the photographed object. By means of the present invention, a machine replaces a human eye to quickly and accurately perform detection, the imaging brightness is effectively improved, and imaging with a camera is realized.

Description

Infrared excitation imaging device

Technical field

The invention relates to the field of imaging technology, in particular to an infrared excitation imaging device.

Background technique

In the prior art, in the field of machine vision, infrared inks in the current printing industry are mainly divided into two categories, one is infrared absorption and the other is infrared excitation. Infrared absorption machine vision solutions are relatively mature. At present, machine vision has not been directly applied to infrared excitation imaging detection. The mainstream approach is to manually use infrared light sources to detect with naked eyes in a dark room, so improvement is needed.

technical problem

The technical problem to be solved by the present invention is to provide an infrared excitation imaging device, which realizes rapid and accurate detection of the machine instead of human eyes, effectively improves the imaging brightness, and realizes imaging with a camera.

Technical solutions

In order to solve the above technical problems, the present invention provides an infrared excitation imaging device, including:

A subject, the subject is provided with infrared excitation ink;

An infrared excitation light source, the light emitted by the infrared excitation light source irradiates the infrared excitation ink;

An industrial camera, the industrial camera is provided with an infrared excitation imaging lens, the infrared excitation imaging lens faces the infrared excitation ink, and an infrared cut filter is arranged in the optical path between the infrared excitation imaging lens and the object.

Further, the infrared excitation light source includes a housing provided with a spherical groove, at least two infrared LED lamp beads are arranged in the spherical groove, and a condenser is provided on the infrared LED lamp beads, and the infrared LED The light emitted by the lamp beads is focused on the infrared excitation ink;

Further, the number of the infrared LED lamp beads is 8, and the infrared LED lamp beads are arranged on concentric circles.

Further, the infrared cut filter is arranged at the front end and/or the back end of the infrared excitation imaging lens.

Further, the industrial camera is installed on a top plate through a second translation mechanism, the top plate is connected to a base through a supporting plate, and the base is connected to an infrared excitation light source through a first translation mechanism, a lifting mechanism, and a steering mechanism.

Further, the second translation mechanism includes an electric push rod, the push rod of the electric push rod is fixed with a second sliding block, the second sliding block is slidably mounted on the top plate, and the side of the second sliding block A second mounting board is fixed, and the industrial camera is mounted on the second mounting board;

Further, the first translation mechanism includes a first motor, the output shaft of the first motor is connected with a first screw, and a first sliding block is sleeved on the first screw through a thread, and the first The sliding block is slidably mounted on the base, and a movable seat is fixed on the side of the first sliding block.

Further, the lifting mechanism includes a second motor and a guide post, the second motor and the guide post are mounted on the moving seat, and the output shaft of the second motor is connected with a second screw rod, the second screw rod A lifting seat is sleeved on the upper part through a thread, and the guide post slides through the lifting seat.

Further, the steering mechanism includes a rotating seat and a first mounting plate, the movable seat and the first mounting plate are both hinged on the lifting seat, and a third motor is installed on the side of the movable seat. A sleeve is connected to the output shaft of the sleeve, a third screw rod is sleeved in the sleeve through a thread, and the third screw rod is hinged on the first mounting plate.

Beneficial effect

In the embodiment of the present invention, because the groove is set to be similar to a dome structure, the LED lamp bead combination is embedded in a dome, and the dome structure and condenser lens are used, so it overcomes the lack of direct application of machine vision. In the infrared excitation imaging detection, the problem that the infrared light source can only be used to detect with the naked eye in the dark room can be used to achieve a better focus of all the light emitted by the LED lamp beads to the same position, so the position illuminated by the light source can be maximized. In order to realize the rapid and accurate detection of the machine instead of the human eye, the imaging brightness is effectively improved, and the imaging with the camera is realized.

Furthermore, because an electric push rod is used to push the industrial camera, the first motor drives the first screw to rotate, the first screw can drive the sliding block to translate through the threaded transmission between the first screw and the first sliding block, and the second motor drives the second The screw rod rotates, and the second screw rod can drive the lifting base to move in the vertical direction through the threaded transmission between the second screw rod and the lifting base. The third motor drives the sleeve to rotate. The three-screw rod moves along the axis of the sleeve to drive the first mounting plate to rotate. This overcomes the technical problem of inconvenient adjustment of the traditional infrared excitation light source, and thus achieves convenient adjustment of the horizontal and vertical positions of the infrared excitation light source. The technical effect of the angular position and the horizontal position of the industrial camera.

Description of the drawings

Fig. 1 is a schematic diagram of the structure of the infrared excitation imaging device of the present invention.

Fig. 2 is a schematic diagram of the structure of the infrared excitation imaging device of the present invention.

Fig. 3 is a schematic diagram of the structure of an infrared cut filter in the infrared excitation imaging device of the present invention.

Fig. 4 is a schematic diagram of the structure of the infrared excitation light source in the infrared excitation imaging device of the present invention.

Fig. 5 is a schematic diagram of the installation structure of the infrared excitation imaging device of the present invention.

Fig. 6 is a schematic structural diagram of a second translation mechanism in the infrared excitation imaging device of the present invention.

Fig. 7 is a schematic structural diagram of the first translation mechanism in the infrared excitation imaging device of the present invention.

Fig. 8 is a schematic structural diagram of the lifting mechanism in the infrared excitation imaging device of the present invention.

Fig. 9 is a schematic diagram of the structure of the steering mechanism in the infrared excitation imaging device of the present invention.

The best mode of the present invention

In order to fully understand the technical content of the present invention, the technical solution of the present invention will be further introduced and illustrated below in conjunction with the schematic diagram, but it is not limited thereto.

As shown in Figures 1 and 2, the infrared excitation imaging device of the present invention includes a subject 1, an infrared excitation light source 3, and an industrial camera 4. The subject 1 is provided with an infrared excitation ink 2 and the light emitted by the infrared excitation light source 3 is illuminated On the infrared excitation ink 2, the industrial camera 4 is equipped with an infrared excitation imaging lens 5, the infrared excitation imaging lens 5 faces the subject 1, and the optical path between the industrial camera 4 and the subject 1 is provided with an infrared cut filter 6 , The surface of the subject 1 is provided with infrared excitation ink 2, which will excite visible light of other wavelengths after receiving the light emitted by the infrared excitation light source 3, so that a specific pattern is visible to the naked eye.

It is understandable that, as shown in FIG. 4, the infrared excitation light source 3 includes a housing 31 provided with a spherical groove 34, and at least two infrared LED lamp beads 32 are provided in the spherical groove 34. A condenser 33 is provided on the top to focus the light emitted by the infrared LED lamp beads 32 onto the infrared excitation ink 2. The groove 34 is similar to a dome structure in which the LED lamp bead assembly is embedded in a dome. The use of the dome structure and the condenser 33 components can better focus the light emitted by all the LED lamp beads to the same position, so that the maximum light intensity can be obtained at the position illuminated by the light source. Specifically, the number of infrared LED lamp beads 32 is eight, and the infrared LED lamp beads 32 are arranged on concentric circles.

As shown in FIG. 3, the infrared cut filter 6 is arranged at the front and/or rear end of the infrared excitation imaging lens 5. Preferably, an infrared cut filter is added in front of and behind the infrared excitation imaging lens 5 in this embodiment. Mirror 6, filtering effect is better.

To sum up, as shown in Figures 1 to 4, the infrared excitation light source 3 is a combination of infrared LED lamp beads 32 embedded in a dome, and at the same time, a condenser 33 is used in front of the infrared LED lamp beads 32 to combine all the infrared LED lamp beads 32 The emitted light is focused to the same position, so the maximum light intensity can be obtained at the position illuminated by the light source; there is infrared excitation ink 2 on the surface of the subject 1, after receiving the light emitted by the infrared LED lamp bead 32, it will excite other Wavelength of visible light, so specific patterns can be seen by the naked eye; an infrared cut filter 6 is added in front of and behind the infrared excitation imaging lens 5. This is an improved industrial camera 4 lens for infrared excitation imaging, because infrared excitation ink 2 The brightness level of the excited visible light is several orders of magnitude different from the light emitted by the infrared LED lamp beads 32. Without the use of an improved lens, the industrial camera 4 cannot obtain the excited pattern (the light emitted by the infrared LED will It is annihilated), so an improved lens is needed; the industrial camera 4 can replace manual labor with a machine, and the industrial camera 4 can be used to collect the excited images for subsequent software processing and analysis.

In the present invention, the infrared excitation light source 3 is designed to improve the imaging brightness level, the infrared excitation imaging lens 5 is improved in design, the interference light is filtered, and the industrial camera 4 machine vision detection realizes fast and accurate detection.

As shown in Figures 5-9, the industrial camera 4 is installed on the top plate 13 through the second translation mechanism 11. The top plate 13 is connected to the base 7 through the support plate 12, and the base 7 is passed through the first translation mechanism 8, the lifting mechanism 9, and the steering mechanism 10. Connected to the infrared excitation light source 3; the second translation mechanism 11 includes an electric push rod 111, the push rod of the electric push rod 111 is fixed with a second slider 112, the second slider 112 is slidably mounted on the top plate 13, and the second slider 112 A second mounting plate 113 is fixed on the side of the industrial camera 4, and the industrial camera 4 is mounted on the second mounting plate 113; the first translation mechanism 8 includes a first motor 81, and the output shaft of the first motor 81 is connected with a first screw 82, A threaded rod 82 is sleeved with a first slider 83, the first slider 83 is slidably mounted on the base 7, and the side of the first slider 83 is fixed with a movable seat 84; the lifting mechanism 9 includes a second motor 91 And the guide post 94, the second motor 91 and the guide post 94 are mounted on the moving seat 84, the output shaft of the second motor 91 is connected with a second screw rod 93, and the second screw rod 93 is threaded with a lifting seat 92, The guide column 94 slides through the lifting base 92; the steering mechanism 10 includes a rotating base 101 and a first mounting plate 105. The moving base 101 and the first mounting plate 105 are both hinged on the lifting base 92, and a third mounting plate is mounted on the side of the moving base 101. The output shaft of the motor 102 and the third motor 102 is connected with a sleeve 103. The sleeve 103 is threaded with a third screw rod 104, and the third screw rod 104 is hinged on the first mounting plate 105.

The first motor 81 drives the first screw 82 to rotate. The first screw 82 can drive the slider 83 to translate through the threaded transmission with the first slider 83, thereby driving the infrared excitation light source 3 to translate; the second motor 91 drives The second screw rod 93 rotates, and the second screw rod 93 can drive the lifting base 92 to move in the vertical direction through the threaded transmission between the second screw rod 93 and the lifting base 92, and the infrared excitation light source 3 can be driven to move in the vertical direction from the heat; the third motor 102 drives the sleeve 103 to rotate. The sleeve 103 can push the third screw 104 to move along the axis of the sleeve 103 through the threaded transmission between the sleeve 103 and the third screw 104, thereby driving the first mounting plate 105 to rotate, thereby Adjust the angle of the infrared excitation light source 3.

In the present invention, the horizontal position of the infrared excitation light source 3 can be adjusted by the first translation mechanism 8, the height position of the infrared excitation light source 3 can be adjusted by the lifting mechanism 9, and the angular position of the infrared excitation light source 3 can be adjusted by the steering mechanism 10. The mechanism 8, the lifting mechanism 9, and the steering mechanism 10 are all driven by a screw rod, which can make full use of the accuracy and self-locking of the screw rod transmission to ensure the accuracy and stability of the adjustment; at the same time, the second translation mechanism 11 can adjust the industrial camera 4 The horizontal position improves the flexibility of the overall use and is easy to adjust.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. And variations, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

An infrared excitation imaging device, characterized in that it comprises:

A subject, the subject is provided with infrared excitation ink;

An infrared excitation light source, the light emitted by the infrared excitation light source irradiates the infrared excitation ink;

An industrial camera, the industrial camera is provided with an infrared excitation imaging lens, the infrared excitation imaging lens faces the infrared excitation ink, and an infrared cut filter is arranged in the optical path between the infrared excitation imaging lens and the object.

2. The infrared excitation imaging device of claim 1, wherein the infrared excitation light source comprises a housing provided with a spherical groove, and at least two infrared LED lamp beads are arranged in the spherical groove, The infrared LED lamp bead is provided with a condenser, and the light emitted by the infrared LED lamp bead is focused on the infrared excitation ink.

3. The infrared excitation imaging device of claim 1, wherein the number of the infrared LED lamp beads is 8, and the infrared LED lamp beads are arranged on concentric circles.

4. The infrared excitation imaging device according to claim 1, wherein the infrared cut-off filter is arranged at the front and/or rear end of the infrared excitation imaging lens.

5. The infrared excitation imaging device according to claim 1, wherein the industrial camera is mounted on a top plate through a second translation mechanism, and the top plate is connected to a base through a supporting plate, and the base is connected to a base through a first translation mechanism. The mechanism, the lifting mechanism, and the steering mechanism are connected with the infrared excitation light source.

6. The infrared excitation imaging device of claim 5, wherein the second translation mechanism comprises an electric push rod, the push rod of the electric push rod is fixed with a second sliding block, and the second sliding block It is slidably mounted on the top plate, a second mounting plate is fixed on the side of the second sliding block, and the industrial camera is mounted on the second mounting plate.

7. The infrared excitation imaging device of claim 5, wherein the first translation mechanism comprises a first motor, an output shaft of the first motor is connected with a first screw, and the first screw is A first sliding block is sleeved on the upper part through a thread, the first sliding block is slidably mounted on the base, and a moving seat is fixed on the side of the first sliding block.

8. The infrared excitation imaging device of claim 7, wherein the lifting mechanism comprises a second motor and a guide post, the second motor and the guide post are mounted on a moving seat, and the second motor The output shaft is connected with a second screw rod, a lifting seat is sleeved on the second screw rod through a thread, and the guide post slides through the lifting seat.

9. The infrared excitation imaging device according to claim 8, wherein the steering mechanism comprises a rotating base and a first mounting plate, and the moving base and the first mounting plate are both hinged on the lifting base, and the moving A third motor is installed on the side of the seat, the output shaft of the third motor is connected with a sleeve, and a third screw is sleeved in the sleeve through a thread, and the third screw is hinged on the first mounting plate superior.