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Digital ultraviolet exposure controller

An ultraviolet and exposure technology, applied in the direction of program control, computer control, general control system, etc., can solve the problems of a single countdown time controller, affecting the effect of graphic transfer, affecting the quality of plate making, etc., to meet the needs of exposure, convenient Promote the application, the effect of accurate exposure time

Inactive Publication Date: 2012-07-04
XINXIANG MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in repeated exposure, since the residual temperature of the ultraviolet lamp tube is different after each exposure, the exposure amount is different for the same exposure time, which directly affects the effect of graphic transfer, and then affects the quality of the board.
[0003] The ultraviolet exposure devices currently used are all single countdown time controllers. Users often need to adjust the exposure time according to external factors to achieve the correct exposure.
If you are not careful, there will be overexposure or underexposure, which will affect the effect of plate making

Method used

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Examples

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Embodiment 1

[0015] Embodiment one: see figure 1 , the digital ultraviolet light exposure controller of the present invention contains ultraviolet sensor, single-chip microcomputer, exposure time setting switch, exposure control switch and exposure time display module, and described ultraviolet sensor is installed in exposure box, and the output signal of ultraviolet sensor is connected through analog-to-digital converter into the single-chip microcomputer, the exposure time setting switch, exposure control switch and display module are all connected to the single-chip microcomputer, the single-chip microcomputer is connected to the ultraviolet drying board lamp through the drive control circuit, the input end of the drive control circuit is connected to the single-chip microcomputer under control, and the drive control circuit The control switch is connected to the power circuit of the ultraviolet drying board lamp.

[0016] The control switch can be a relay, the control coil of the relay...

Embodiment 2

[0017] Embodiment two: see figure 1 , figure 2 , the digital ultraviolet exposure amount controller of present embodiment, different from embodiment one, single-chip microcomputer adopts any one of 51 series, and analog-to-digital converter adopts 8 serial A / D converters, and the output signal of ultraviolet sensor is connected to The analog signal input port of the A / D converter, an adjustable resistor is connected between REF- and GND of the A / D converter and the power supply, and the output terminal of the adjustable resistor is connected to the REF+ of the A / D converter, A / D The clock and data output ports of the converter are connected to the serial communication port of the single-chip microcomputer, and its gating control port is connected to an interrupt request port of the single-chip microcomputer, and the contacts at both ends of the exposure control switch are respectively connected to the power supply and the reset port of the single-chip microcomputer. The expo...

Embodiment 3

[0019] Embodiment three: see figure 1 , figure 2 . The digital ultraviolet exposure controller of this embodiment, the ultraviolet sensor U1 is produced in Germany, the model is UV10T2E10L, the measurement range: 210-450nm, the output voltage: 0-5V analog signal. The digital-to-analog conversion circuit U2 adopts the 8-bit serial A / D converter chip LTC549 or TLC548 produced by Texas Instruments, which can communicate with general-purpose microprocessors and controllers through CLK, CS, and DATA OUT lines. With 4MHz on-chip system clock and software and hardware control circuits, the maximum conversion time is 17μs. The maximum conversion rate allowed by TLC548 is 45500 times / S, and TLC549 is 40000 times / S. The total offset error is ±0.5LSB maximum, and the typical power dissipation is 6mW. The single-chip microcomputer U3 adopts the low-voltage, high-performance CMOS 8-bit single-chip microcomputer AT89C2051 produced by the American ATMEL company. The chip contains a rewri...

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Abstract

The invention relates to an exposure controller in a printing industry and a PCB (Printed Circuit Board) manufacturing industry. A digital ultraviolet exposure controller based on a single chip technology comprises an ultraviolet sensor and a single chip, wherein the ultraviolet sensor is mounted in an exposure box; an output signal of the ultraviolet sensor is switched into the single chip through an analog / digital converter; an exposure time setting switch, an exposure control switch and a display module are all connected with the single chip; the single chip is connected with an ultraviolet iodin gallium lamp through a driving control circuit; an input end of the driving control circuit is in controlled connection with the single chip; and a control switch of the driving control circuit is connected with a power circuit of the ultraviolet iodin gallium lamp. In the digital ultraviolet exposure controller, the ultraviolet sensor is utilized to detect the illumination of ultraviolet rays in real time and the single chip is used for calculating the exposure time of the illumination, so that the purpose of accurately controlling the exposure is achieved, the digitalization of the exposure is realized and the exposure of the PCB is more accurate.

Description

technical field [0001] The invention relates to an exposure controller for printing industry and PCB manufacturing industry, in particular to a digital ultraviolet exposure controller based on single-chip microcomputer technology. Background technique [0002] In the printing industry and PCB manufacturing industry, ultraviolet exposure lamps are generally used for graphic transfer printing. The general exposure time is 20 to 120 seconds, but the start-up time of ultraviolet lamps is greater than 60 seconds, and is affected by power supply voltage, ambient temperature, and aging of the lamp tube. and other factors. Especially in repeated exposure, since the residual temperature of the ultraviolet lamp tube is different after each exposure, the exposure amount is different for the same exposure time, which directly affects the effect of graphic transfer, and then affects the quality of the board. . [0003] The currently used ultraviolet exposure devices all have a single c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/20G05B19/042
Inventor 董兵超梁云真申杰奋秦鑫赵合运李晨希
Owner XINXIANG MEDICAL UNIV
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