CN215682435U

CN215682435U - Machine identification device

Info

Publication number: CN215682435U
Application number: CN202122453504.7U
Authority: CN
Inventors: 何鑫; 雷李华
Original assignee: Dongguan Panxin Automation Technology Co ltd
Current assignee: Dongguan Panxin Automation Technology Co ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-01-28
Anticipated expiration: 2031-10-12

Abstract

The utility model discloses a machine identification device, which comprises a camera, an LED lamp bead for illuminating the camera, a light source brightness controller and a power supply for supplying power to the LED lamp bead, wherein the LED lamp bead is used for illuminating the camera; the light source brightness controller comprises a complex programmable logic device electrically connected with the camera and a field effect tube electrically connected with the complex programmable logic device, and the field effect tube is electrically connected with the power supply; the rated voltage of the power supply is greater than the rated voltage of the LED lamp beads, and the current value passing through the LED lamp beads is smaller than the maximum peak current of the LED lamp beads; the light source brightness controller is used for controlling the set time length for lighting the LED lamp beads. In this embodiment, can improve the luminance of LED lamp pearl in setting for a long time, and be unlikely to cause great influence to the life of LED lamp pearl.

Description

Machine identification device

Technical Field

The utility model relates to the field of industrial automation, in particular to a machine identification device.

Background

The machine recognition device is used for providing illumination for the industrial camera, and in order not to influence the production efficiency in industrial application, the exposure time of the industrial camera is generally adjusted to be 100 and 500 microseconds; the existing machine recognition device generally adopts LED lamp beads to provide illumination for an industrial camera.

In an actual production process, a customer desires that the machine recognition device achieve a higher brightness without replacing the light source due to equipment adjustment, process adjustment, and the like.

In view of this, a machine recognition device needs to be designed, which can effectively improve the illumination brightness of the LED lamp bead during operation.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve the above problems.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a machine identification device comprises a camera, an LED lamp bead for illuminating the camera, a light source brightness controller and a power supply for supplying power to the LED lamp bead;

the light source brightness controller comprises a complex programmable logic device electrically connected with the camera and a field effect tube electrically connected with the complex programmable logic device, and the field effect tube is electrically connected with the power supply;

the rated voltage of the power supply is greater than the rated voltage of the LED lamp beads, and the current value passing through the LED lamp beads is smaller than the maximum peak current of the LED lamp beads; the light source brightness controller is used for controlling the set time length for lighting the LED lamp beads.

Optionally, the lighting time of the LED lamp bead is below 1/10 of the extinguishing time of the LED lamp bead.

Optionally, the set time period is 1-999 milliseconds.

Optionally, the rated voltage of the power supply is not more than twice the rated voltage of the LED lamp bead.

Optionally, the rated voltage of the LED lamp bead is 24V, and the maximum peak current is 100 mA;

the rated voltage of the power supply is 48V.

Optionally, the machine recognition device further comprises an air supply device for cooling the LED lamp bead.

Optionally, the machine recognition device further comprises a circuit board, and the LED lamp bead, the complex programmable logic device and the field effect transistor are all mounted on the circuit board.

Optionally, the machine recognition device further comprises a single chip microcomputer, and the single chip microcomputer is electrically connected with the complex programmable logic device.

Compared with the prior art, the utility model has the following beneficial effects:

in the embodiment, the light source brightness controller comprises a complex programmable logic device and a field effect transistor, and the light source brightness controller can control the on and off of a power supply, so that the LED lamp beads are lighted for a set time, the set time is generally dozens of milliseconds, and the light source brightness controller can be specifically set according to different camera requirements; therefore, the LED lamp beads have higher luminous brightness under higher power supply voltage, and when the LED lamp beads are controlled to be lightened for a set time, the damage of the LED lamp beads caused by overhigh temperature of the LED lamp beads can be avoided, so that the brightness of the LED lamp beads during working is effectively improved; the machine recognition device of this embodiment need not to change LED lamp pearl or change the circuit board, enables the work luminance of LED lamp pearl higher.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the utility model, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the utility model without affecting the effect and the achievable purpose of the utility model.

Fig. 1 is a schematic diagram of a machine recognition device according to an embodiment of the present invention.

Illustration of the drawings: 1. a camera; 2. LED lamp beads; 3. a complex programmable logic device; 4. a field effect transistor; 5. a power source; 6. and a single chip microcomputer.

Detailed Description

In order to make the objects, features and advantages of the present invention more apparent and understandable, the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings, and it is to be understood that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

The embodiment of the utility model provides a machine identification device which can effectively improve the brightness of an LED lamp bead 2 without damaging the service life of the LED lamp bead 2.

Referring to fig. 1, the machine recognition device comprises a camera 1, an LED lamp bead 2 for illuminating the camera 1, a light source brightness controller and a power supply 5 for supplying power to the LED lamp bead 2;

the light source brightness controller comprises a complex programmable logic device 3 electrically connected with the camera 1 and a field effect tube 4 electrically connected with the complex programmable logic device 3, and the field effect tube 4 is electrically connected with a power supply 5;

the rated voltage of the power supply 5 is greater than the rated voltage of the LED lamp beads 2, and the current value passing through the LED lamp beads 2 is smaller than the maximum peak current of the LED lamp beads 2; the light source brightness controller is used for controlling the set time length for lighting the LED lamp beads 2.

The LED lamp bead is damaged by heating generally because the LED lamp bead is seriously heated due to large current, so that the LED lamp bead is effectively prevented from being damaged by reasonably controlling the heating condition of the LED lamp bead.

It should be noted that the image processing time after the camera takes a picture is often only tens of milliseconds, and only the brightness needs to be met within the tens of milliseconds. Generally, in practical application of the LED lamp bead 2, the temperature of the LED lamp bead 2 reaches 60 ℃ after the LED lamp bead 2 continuously works for one hour, and the LED lamp bead 2 is easily damaged after the temperature exceeds 60 ℃. But the maximum peak current of the LED lamp bead 2 can reach 100 mA. Therefore, when the rated voltage of the power supply is greater than the rated voltage of the LED lamp bead 2, after the power supply is switched on, the current passing through the LED lamp bead 2 can be quickly close to or equal to 100mA, so that the LED lamp bead 2 emits light with 3-5 times of brightness in normal work; at the moment, the working time of the LED lamp beads 2 is controlled through the complex programmable logic device 3 and the field effect tube 4, and the temperature of the LED lamp beads 2 is prevented from exceeding 60 ℃. Generally, the set duration is not greater than 50 milliseconds.

Specifically, the light source brightness controller can control the power supply 5 to access the circuit or disconnect the circuit, so that the control of the lighting time of the LED lamp bead is realized, namely the time length of the power supply 5 accessing the circuit is controlled when the time length is set.

Optionally, the lighting time of the LED lamp bead 2 is below 1/10 of the extinguishing time of the LED lamp bead 2. It should be clear that, given LED lamp pearl 2 sufficient radiating time like this, effectively increased LED lamp pearl 2's life, avoided LED lamp pearl 2 high temperature to damage.

Optionally, the set time is 1-999 milliseconds. It is worth to be noted that the complex programmable logic device 3 is electrically connected to the fet 4, and can reach 1 millisecond at the time precision control level. Therefore, the set time period can be set according to the needs of the camera.

Optionally, the rated voltage of the power supply 5 is not more than twice the rated voltage of the LED lamp bead 2. It should be clear that this is to avoid the transient current too large to break down LED lamp bead 2.

In this embodiment, the rated voltage of the LED lamp bead 2 is 24V, and the maximum peak current is 100 mA; the power supply 5 is rated at 48V.

Optionally, the machine recognition device further comprises an air supply device for cooling the LED lamp bead 2. Specifically, air supply arrangement cooling LED lamp pearl 2 can further increase LED lamp pearl 2's life.

Optionally, the machine recognition device further comprises a circuit board, and the LED lamp bead 2, the complex programmable logic device 3 and the field effect transistor 4 are all mounted on the circuit board.

Optionally, the machine recognition device further includes a single chip microcomputer 6, and the single chip microcomputer 6 is electrically connected to the complex programmable logic device 3.

Specifically, the specific process of controlling the light emission of the LED lamp bead 2 of the machine recognition device is as follows:

the camera sends a pulse signal to the complex programmable logic device 3, and the complex programmable logic device drives the field effect transistor 4 to control whether the power supply 5 is connected or not, so that the LED lamp beads 2 are controlled to be turned on or off; in the process, the parallel processing capacity of the complex programmable logic device 3 is utilized, the signal response delay is shortened to 3 microseconds, the lighting time of the LED lamp bead 2 can be adjusted by 0-999 microseconds, and the adjustment precision of 1 microsecond is realized.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A machine recognition device comprising a camera (1) and an LED lamp bead (2) for illuminating the camera (1), characterized by further comprising a light source brightness controller and a power supply (5) for supplying power to the LED lamp bead (2);

the light source brightness controller comprises a complex programmable logic device (3) electrically connected with the camera (1) and a field effect transistor (4) electrically connected with the complex programmable logic device (3), wherein the field effect transistor (4) is electrically connected with the power supply (5);

the rated voltage of the power supply (5) is greater than the rated voltage of the LED lamp beads (2), and the current value passing through the LED lamp beads (2) is less than the maximum peak current of the LED lamp beads (2); the light source brightness controller is used for controlling the set time length for lighting the LED lamp beads (2).

2. The machine recognition device according to claim 1, wherein the lighting time of the LED lamp bead (2) is 1/10 or less of the extinguishing time of the LED lamp bead (2).

3. The machine-readable storage medium of claim 1, wherein the set time period is 1 to 999 milliseconds.

4. The machine recognition device of claim 1, wherein the rated voltage of the power supply (5) is no more than twice the rated voltage of the LED lamp bead (2).

5. The machine identification device according to claim 1, characterized in that the rated voltage of the LED lamp bead (2) is 24V, and the maximum peak current is 100 mA;

the rated voltage of the power supply (5) is 48V.

6. The machine recognition device according to claim 1, further comprising air blowing means for cooling the LED lamp bead (2).

7. The machine recognition device of claim 1, further comprising a circuit board, wherein the LED lamp bead (2), the complex programmable logic device (3) and the field effect transistor (4) are mounted on the circuit board.

8. The machine recognition device according to claim 1, further comprising a single chip microcomputer (6), wherein the single chip microcomputer (6) is electrically connected to the complex programmable logic device (3).