CN213118709U - A diffuse light source structure for linear CCD sensor scanning - Google Patents
A diffuse light source structure for linear CCD sensor scanning Download PDFInfo
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- CN213118709U CN213118709U CN202022423509.0U CN202022423509U CN213118709U CN 213118709 U CN213118709 U CN 213118709U CN 202022423509 U CN202022423509 U CN 202022423509U CN 213118709 U CN213118709 U CN 213118709U
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Abstract
The utility model discloses a diffuse light source structure for linear CCD sensor scanning, relating to the technical field of object surface detection, comprising a lampshade, wherein the top surface of the lampshade is provided with a power supply circuit board, and the top surface of the power supply circuit board is provided with an electric contact pin; the scanning channel penetrates through the power supply circuit board and the lampshade from top to bottom; a plurality of illuminating pieces which are obliquely arranged on the bottom surface of the lampshade; the control circuit board is arranged at the end part of the lampshade; the MOS tube, the MOS pipe is equipped with a plurality ofly, and they all connect in a side of control circuit board. The utility model provides a first fin can receive the vast majority of heats that the MOS pipe produced, and the heat shield of first fin top can block the heat effectively moreover and upwards transmit, avoids the second part control circuit board to be heated and causes harmful effects, has improved control circuit board's life effectively.
Description
Technical Field
The utility model relates to an object surface detection technical field especially relates to a diffuse light source structure for linear CCD sensor scanning.
Background
CCD sensor, made of a semiconductor material with high light sensitivity, can convert light into electric charge, and convert the electric charge into digital signals through an analog-to-digital converter, and the digital signals are processed by a computer. At present, the method is widely applied to the detection of the surface defects of industrial products. In particular to the detection of various defects on the surface of a product.
In the detection process of the surface defects (with high precision requirement) of the product, the sampling environment is very important, and reliable and high-precision data must be provided for the subsequent image processing process so as to obtain an accurate defect detection result.
At present, in CCD sensor scanning sample process, the luminance and the stability of illumination source directly influence the dynamic range and the precision of CCD sensor scanning sample, and illumination source's luminance is high and stability is good, then can acquire more accurate sample data, wideer dynamic range to adapt to more sample types.
At present, light source is mostly LED light source, if improve the luminance of illumination, will receive LED light source's radiating restriction in the very big degree, especially to the check out test set in the work, the space of field installation is limited, too big light source heat dissipation is very improper also not easy to assemble, moreover, rocking in the course of the work, because the big inertia of weight of LED light source (configuration heat dissipation) is big, can influence the stability of light source, the accuracy of CCD sensor scanning sample also can be influenced in the production of shake.
Therefore, the problem to be solved is to construct an illumination light source which is suitable and convenient to install, good in illumination effect, high in heat dissipation efficiency and small in size.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a diffusion light source structure for linear CCD sensor scanning, make diffusion light source simple structure, the heat dissipation is stronger, and the volume is less, can effectively prolong diffusion light source's life.
The purpose of the utility model can be achieved by adopting the following technical scheme:
a diffuse light source structure for linear CCD sensor scanning comprises
The lamp comprises a lampshade, wherein a power supply circuit board is arranged on the top surface of the lampshade, and an electric contact pin is arranged on the top surface of the power supply circuit board;
the scanning channel penetrates through the power supply circuit board and the lampshade from top to bottom and provides a downward scanning channel for the CCD sensor;
the illuminating pieces are arranged on the bottom surface of the lampshade in an inclined mode and are used for forming a diffusion light source;
and the control circuit board is arranged at the end part of the lampshade and is used for driving the illuminating piece to be turned on or turned off.
Preferably, the control circuit board comprises a second part control circuit board and a first part control circuit board which are distributed up and down, and a plurality of MOS (metal oxide semiconductor) tubes are arranged on one side surface of the first part control circuit board.
Preferably, the other side of the first part of the control circuit board is provided with a first radiating fin, and the MOS tube is attached to the first radiating fin.
Preferably, a plurality of through holes for cutting off heat transfer penetrate through the connection part between the first part of control circuit board and the second part of control circuit board.
Preferably, the plurality of through holes are divided into an upper row and a lower row, the two illuminating parts are both LED lamp belts which are obliquely arranged on the bottom side surface of the lampshade, the scanning channel is positioned between the two illuminating parts, and the LED lamp belts are composed of a plurality of LED lamp beads capable of being instantly lightened.
Preferably, a heat insulation sheet is arranged on one side surface of the second part of control circuit board, and is used for reducing heat radiation to the direction where the second part of control circuit board is located.
Preferably, the heat shield and the MOS transistor are located on different sides of the control circuit board, and the heat shield is located above the first heat sink.
Preferably, the top surface of the power supply circuit board is further provided with a magnet for enabling the power supply circuit board to be magnetically attracted on the scanning and sampling device needing illumination, a support piece is connected between the lampshade and the first radiating fin, and a second radiating fin is fixed at the end of the lampshade.
The utility model has the advantages of:
the utility model provides a first fin can receive the vast majority of heats that the MOS pipe produced, and the heat shield of first fin top can block the heat effectively moreover and upwards transmit, avoids the second part control circuit board to be heated and causes harmful effects, has improved control circuit board's life effectively.
The utility model provides a structural configuration between power supply circuit board and control circuit board and the illumination piece is reasonable, can inhale above-mentioned structure magnetism on the scanner through magnet, and whole volume is less, adapts to the structure of CCD sensor scanner, convenient whole plug.
The utility model provides a diffusion light source structure is small, makes things convenient for the modularization installation, only needs simple plug can fix, also dispels the heat easily when wholly using moreover, and local high temperature resistant, the illuminating effect is good, and the radiating efficiency is high.
Drawings
Fig. 1 is a schematic view of a vertical three-dimensional structure of a power supply circuit board and a control circuit board according to an embodiment of the present invention;
fig. 2 is a schematic view of a horizontal three-dimensional structure of a power supply circuit board and a control circuit board according to an embodiment of the present invention;
fig. 3 is a schematic front view of a power supply circuit board and a control circuit board according to an embodiment of the present invention.
In the figure: 1-power supply circuit board, 2-lighting part, 3-scanning channel, 4-electrical contact pin, 5-magnet, 6-control circuit board, 601-first part control circuit board, 602-second part control circuit board, 7-perforation, 8-first radiating fin, 9-second radiating fin, 10-heat-insulating fin, 11-MOS tube, 12-support part and 13-lampshade.
Detailed Description
In order to make the technical solutions of the present invention clearer and clearer for those skilled in the art, the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1-3, the present embodiment provides a diffuse light source structure for scanning of a linear CCD sensor, which includes
The lamp shade 13, the top surface of the lamp shade 13 is provided with a power supply circuit board 1, and the top surface of the power supply circuit board 1 is provided with an electric contact pin 4 for contacting with an external power supply contact to supply power to the lighting part 2;
the scanning channel 3 is of a plate-shaped structure with a long hole in the middle, the scanning channel 3 penetrates through the power supply circuit board 1 and the lampshade 13 from top to bottom, a downward scanning channel is provided for the CCD sensor, and the CCD sensor can conveniently pass through the diffusion light source to scan downwards;
the illuminating parts 2 are arranged in a plurality of numbers, are obliquely arranged on the bottom surface of the lampshade 13 and are used for forming a diffused light source, and the illuminating area is obliquely downward;
the control circuit board 6 is arranged at the end part of the lampshade 13 and is used for controlling the lighting or extinguishing of the illuminating part 2, and the brightness (0.7A-6.4A) of the illuminating part 2 can be adjusted through the control circuit board 6;
the overall diffuse light source structure is symmetrical about the central axis of the lamp housing 13.
In this embodiment, as shown in fig. 1, the control circuit board 6 includes a second part 602 and a first part 601 distributed from top to bottom, a side of the first part 601 is provided with a plurality of MOS transistors 11, two ends of the lampshade 13 are provided with control circuit boards 6, each control circuit board 6 is provided with three MOS transistors 11, and an electric wire is connected between the control circuit board 6 and the power supply circuit board 1.
In this embodiment, as shown in fig. 1, the other side surface of the first part of the control circuit board 601 is provided with a first heat sink 8, and the MOS transistor 11 is attached to the first heat sink 8, so as to facilitate heat dissipation of the MOS transistor 11.
In this embodiment, as shown in fig. 1, because the thermal conductivity of the material of the circuit board is good, a plurality of through holes 7 for cutting off the heat transfer are formed through the connection between the first control circuit board 601 and the second control circuit board 602, the plurality of through holes 7 are divided into an upper row and a lower row, the upper row is provided with two through holes 7, the lower row is provided with three through holes 7, which are both in a strip shape, so as to avoid the influence on the second control circuit board 602 due to the higher temperature conduction below the second control circuit board.
In this embodiment, as shown in fig. 2, illuminating part 2 is provided with two, is LED lamp area, and they all incline to set up the bottom surface at lamp shade 13, scanning channel 3 is located two between illuminating part 2, above-mentioned LED lamp area comprises a plurality of LED lamp pearls that can light in the twinkling of an eye, and lights in proper order in step with CCD sensor's pixel, when satisfying the lighting demand, very big saving energy consumption, increase of service life practices thrift the energy consumption, increase of service life.
In this embodiment, as shown in fig. 2, a heat insulating sheet 10 is disposed on one side surface of the second control circuit board 602, and is a thin metal sheet, the heat insulating sheet 10 and the MOS transistor 11 are disposed on different sides of the control circuit board 6, and the heat insulating sheet 10 is disposed above the first heat sink 8, so as to reduce radiation of heat emitted from the first heat sink 8 to the direction in which the second control circuit board 602 is located, and effectively improve the service life of the second control circuit board 602.
In this embodiment, if the control circuit board 6 performs negative feedback amplification, the current at the output end can be arbitrarily and smoothly adjusted by increasing or decreasing the voltage at the control end.
In this embodiment, as shown in fig. 1, the top surface of the power supply circuit board 1 is further provided with a magnet 5 for making the power supply circuit board 1 magnetically attract on the scanning and sampling device needing illumination, so as to facilitate plugging and unplugging, and perform modular installation, a support member 12 is connected between the lamp shade 13 and the first heat sink 8, the support member 12 is of an L-plate structure, so as to facilitate the fixing of the first heat sink 8 and the control circuit board 6 on the top side of the end portion of the lamp shade 13, and the end portion of the lamp shade 13 is fixed with a second heat sink 9.
A method for assembling a diffuse light source structure for linear CCD sensor scanning comprises the following steps
Step A: integrally molding the second heat sink 9 and the lamp housing 13;
step B, respectively fixing the power supply circuit board 1 and the lighting part 2 on the lampshade 13 in the step A, and fixing the magnet 5 on the power supply circuit board 1;
and C: the first heat sink 8, the heat insulating sheet 10, and the MOS tube 11 are fixed to the control circuit board 6, and the first heat sink 8 is fixed to the end of the globe 13 in step B.
The assembling method of the diffusion light source structure for the scanning of the linear CCD sensor specifically comprises the following steps
The step A is as follows
Step a 1: the second radiating fin 9 and the lamp shade 13 are integrally formed through a stamping process;
the step B is as follows
Step b 1: after the scanning channel 3 is transversely fixed in the middle of the lampshade 13, the opening part of the power supply circuit board 1 is aligned with the scanning channel 3, and the power supply circuit board 1 is fixed on the top side surface of the lampshade 13 through screws;
step b 2: fixing the magnet 5 on the top side surface of the power supply circuit board 1, so that the magnet 5 can drive the power supply circuit board 1 and the lampshade 13 to be magnetically attracted on a scanner provided with a linear CCD sensor;
step b 3: the two illuminating parts 2 are symmetrically fixed on the bottom side surface of the lampshade 13, so that when the lampshade 13 is horizontally placed, an acute angle is formed between the illuminating parts 2 and the horizontal plane, and the two illuminating parts 2 are respectively positioned on two sides of the scanning channel 3;
step C is as follows
Step c 1: fixing the MOS tube 11 and the first heat sink 8 on two sides of the first part of the control circuit board 601, and fixing a part of the MOS tube 11 on one side surface of the first heat sink 8;
step c 2; fixing the heat shield 10 on one side of the second control circuit board 602 by screws, so that the heat shield 10 is located above the first heat sink 8;
step c 3: the support 12 is fixed to the top side end of the lamp housing 13 by screws, and then the first heat sink 8 is fixed to the support 12.
In summary, in the present embodiment, the first heat sink 8 provided in the present embodiment can receive most of the heat generated by the MOS11, and the heat insulating sheet 10 above the first heat sink 8 can effectively block the heat from being transmitted upwards, so as to avoid the adverse effect caused by the heat of the second portion of the control circuit board 602, and effectively improve the service life of the control circuit board 6.
The power supply circuit board 1 that this embodiment provided and structural layout between 6 and the illumination piece 2 is reasonable, can inhale above-mentioned structure magnetism through magnet 5 on the scanner, and whole volume is less, adapts to the structure of CCD sensor scanner, makes things convenient for whole plug.
The above description is only a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can replace or change the technical solution and the concept of the present invention within the scope of the present invention.
Claims (5)
1. A diffuse light source structure for linear CCD sensor scanning, characterized by: comprises that
The lamp shade (13), the top surface of the lamp shade (13) is provided with a power supply circuit board (1), and the top surface of the power supply circuit board (1) is provided with an electric contact pin (4);
the scanning channel (3) penetrates through the power supply circuit board (1) and the lampshade (13) from top to bottom, and provides a downward scanning channel for the CCD sensor;
the illuminating pieces (2) are arranged in a plurality of positions, are obliquely arranged on the bottom surface of the lampshade (13) and are used for forming a diffusion light source;
the control circuit board (6) is arranged at the end part of the lampshade (13) and used for driving the illuminating part (2) to be turned on or off;
the control circuit board (6) comprises a second part control circuit board (602) and a first part control circuit board (601) which are distributed up and down, and a plurality of MOS (metal oxide semiconductor) tubes (11) are arranged on one side surface of the first part control circuit board (601);
the other side of the first part of the control circuit board (601) is provided with a first radiating fin (8), and the MOS tube (11) is attached to the first radiating fin (8).
2. The diffuse light source structure for linear CCD sensor scanning of claim 1, characterized in that: a plurality of through holes (7) for cutting off heat transfer penetrate through the connection part between the first part of control circuit board (601) and the second part of control circuit board (602).
3. The diffuse light source structure for linear CCD sensor scanning of claim 2, characterized in that: the LED lamp is characterized in that the through holes (7) are divided into an upper row and a lower row, the number of the illuminating parts (2) is two, the illuminating parts are LED lamp belts, the illuminating parts are obliquely arranged on the bottom side surface of the lampshade (13), the scanning channel (3) is positioned between the two illuminating parts (2), and the LED lamp belts are composed of a plurality of LED lamp beads capable of being instantly lightened.
4. The diffuse light source structure for linear CCD sensor scanning of claim 1, characterized in that: and a heat insulation sheet (10) is arranged on one side surface of the second part of control circuit board (602) and is used for reducing the radiation of heat to the direction of the second part of control circuit board (602).
5. The diffuse light source structure for linear CCD sensor scanning of claim 4, characterized by: the heat insulating sheet (10) and the MOS tube (11) are located on different side faces of the control circuit board (6), the heat insulating sheet (10) is located above the first radiating fins (8), and magnets (5) are further arranged on the top face of the power supply circuit board (1) and used for enabling the power supply circuit board (1) to be magnetically attracted to a scanning and sampling device needing illumination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022423509.0U CN213118709U (en) | 2020-10-28 | 2020-10-28 | A diffuse light source structure for linear CCD sensor scanning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022423509.0U CN213118709U (en) | 2020-10-28 | 2020-10-28 | A diffuse light source structure for linear CCD sensor scanning |
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| CN213118709U true CN213118709U (en) | 2021-05-04 |
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| CN202022423509.0U Active CN213118709U (en) | 2020-10-28 | 2020-10-28 | A diffuse light source structure for linear CCD sensor scanning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128663A (en) * | 2020-10-28 | 2020-12-25 | 江苏善果缘智能科技有限公司 | Diffusing light source structure for linear CCD sensor scanning and assembling method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128663A (en) * | 2020-10-28 | 2020-12-25 | 江苏善果缘智能科技有限公司 | Diffusing light source structure for linear CCD sensor scanning and assembling method thereof |
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