CN114527136A - Grafting system of ultraviolet strip steel pinhole detector and matched LED light source - Google Patents

Grafting system of ultraviolet strip steel pinhole detector and matched LED light source Download PDF

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Publication number
CN114527136A
CN114527136A CN202210184970.6A CN202210184970A CN114527136A CN 114527136 A CN114527136 A CN 114527136A CN 202210184970 A CN202210184970 A CN 202210184970A CN 114527136 A CN114527136 A CN 114527136A
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light source
ultraviolet
led
signal
circuit
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杜松
杨杰
柯俊
郑武
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
    • G01N21/894—Pinholes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/30—Computing systems specially adapted for manufacturing

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

The invention discloses an ultraviolet strip steel pinhole detector grafting system and a matched LED light source, which comprise a pinhole detection unit and a pinhole detection controller which are mutually connected in the prior art, and further comprise a main controller, an isolation and voltage reduction grafting signal capturing unit, a simulation high-frequency signal short-circuit module, an LED constant current source, a stroboscopic driving power module and an ultraviolet LED high-frequency light source; the main controller is connected with the pinhole detection controller through the isolation and voltage reduction grafting signal capturing unit and the simulation high-frequency signal short-circuit module, and is connected with the ultraviolet LED high-frequency light source through the LED constant current source and the stroboscopic driving power module. The device is grafted on an imported original instrument by utilizing mature electronic technologies such as photoelectric coupling isolation and the like, and halogen light sources are replaced by utilizing technologies such as LEDs and the like, so that the defects of high temperature and high pressure of the original instrument, short service life of the light sources, low energy efficiency, high price and the like are overcome. The device has the remarkable advantages of low temperature, low pressure, low load, no ozone, no interference, strong controllability and the like, and is simple and practical in structure, low in cost and easy to popularize.

Description

Grafting system of ultraviolet strip steel pinhole detector and matched LED light source
Technical Field
The invention belongs to the field of electronic information technology and instruments and meters, and particularly relates to a grafting system of an ultraviolet band steel pinhole detector and a matched LED light source.
Background
The grafting system of ultraviolet band steel pinhole detector is one device for detecting quality defect of band steel pinhole via ultraviolet irradiation onto moving band steel. The device generally comprises an ultraviolet light source, a light sensation detection unit and an operation main control unit, and is widely applied to domestic cold-rolled strip steel manufacturing enterprises at present. And the mainstream models are mostly monopolized by overseas manufacturers. The spare parts of the light source are expensive and have limited service life, and if the LED light source system is required to be replaced according to the general rule of the market, the whole LED light source system needs to be replaced, so that the production cost control and the production progress of a factory can be influenced slightly.
The prior imported ultraviolet band steel pinhole detector generally adopts a halogen ultraviolet lamp tube as a light source, and the light source in the form has the following defects:
the service life is short, the average service life is 500 plus 800 hours, the replacement is possible at any time, the stability is very poor, and the cost of the lamp tube is more than or equal to 10 yuan/hour.
Secondly, the power consumption is high and the energy efficiency is low. Only about 20% of the electric energy is converted into ultraviolet light, and most of the energy is converted into heat to be consumed, so that not only is the energy wasted, but also the difficulty of heat dissipation of equipment is caused.
And thirdly, the safety stability is poor, and 700-plus 800VAC high-voltage driving faces danger all the time. Produce a large amount of ozone, contain mercury and generate high heat. The main driving circuit is liable to generate an overcurrent failure due to a high load. The drive circuit is often damaged and serves as an imported spare part, the maintenance and replacement cost is extremely high, and the service life of the accessory consumables is extremely long. The normal production and quality management work of enterprises are seriously influenced.
The ultraviolet led (light Emitting diode) technology is a new and mature light Emitting technology. The LED lighting has wide application prospect due to the characteristics of energy conservation, environmental protection, small volume and long service life.
Ultra-long service life: the specific data of the lab of the chip manufacturer are about 10 ten thousand hours at the junction temperature of 50 ℃, 5 ten thousand hours at the junction temperature of 75 ℃, 1 ten thousand hours at the junction temperature of 100 ℃, 10-degree light attenuation difference is doubled, the service life is longer when the temperature is lower, the service time of the traditional halogen lamp is generally 800 hours, and therefore, the ultraviolet LED high-frequency light source is dozens of times of that of the traditional halogen lamp. The junction temperature of most LED lamps in the market is about 100 ℃, the service life is about 5000-10000 hours, and the junction temperature can reach more than 5 times of that of halogen lamps.
Low power consumption and high energy efficiency: the ultraviolet LED high-frequency light source adopts 24VDC to drive a single block, and the maximum current is limited to 1A. The current is 200mA under the normal use state, namely the full load power is only 4.8-24 w. The normal ultraviolet luminous power is between 70% and 95%, and the energy-saving effect is obvious compared with that of a halogen lamp. The comprehensive energy saving can reach more than 90%.
High safety and stability, strong controllability: the DC 24V drive, the control circuit DC 5V. Is a human body safe voltage range. And no ozone is generated. No mercury and low heat generation. Because the low-voltage direct current drives and basically reduces the load of the original inlet drive control board to an idle load level, and the load is not inductive. Thus basically avoiding the damage of current overload and electromagnetic interference to the imported electrical system. And the intensity of the ultraviolet LED is continuously variable along with the change of the current, and the flicker frequency is adjusted at any time along with the PWM signal value. The halogen lamp has the lowest running power, and the power step increase and decrease is limited by a transformer coil and cannot be continuously adjusted.
Disclosure of Invention
The invention provides an ultraviolet strip steel pinhole detector grafting system and a matched LED light source, which optimize various defects of a halogen ultraviolet light source of a traditional strip steel pinhole detector system, and have the advantages of simple and practical structure, low cost and easy popularization.
In order to achieve the purpose, the invention adopts the following technical scheme:
an ultraviolet strip steel pinhole detector grafting system and a matched LED light source comprise a pinhole detection unit and a pinhole detection controller which are mutually connected in the prior art, and further comprise a main controller, an isolation voltage-reduction grafting signal capturing unit, a simulation high-frequency signal short-circuit module, an LED constant current source, a stroboscopic driving power module and an ultraviolet LED high-frequency light source;
the main controller is connected with the pinhole detection controller through an isolation voltage reduction grafting signal capturing unit and a simulation high-frequency signal short-circuit module, and is connected with the ultraviolet LED high-frequency light source through an LED constant current source and a stroboscopic driving power module.
Preferably, the main controller comprises a single chip microcomputer, a high-frequency isolation circuit connected with the single chip microcomputer, a three-terminal voltage stabilizing circuit, a switching power supply module, a communication interface, a signal access port and an output port, and is used for outputting an LED light source starting signal to the ultraviolet LED high-frequency light source after receiving a starting signal sent by the isolation voltage reduction grafting signal capturing unit and analyzing and processing the starting signal.
Preferably, the single chip microcomputer is internally provided with an HT1621BLCD integrated drive chip and an N76E003AT208 bit microcontroller chip.
Preferably, the main controller is provided with an LCD display screen, a keyboard and a light source fault display lamp.
Preferably, the isolation voltage reduction grafting signal capturing unit comprises a resistor array, a voltage reduction circuit, a diode rectifying circuit and a photoelectric coupling isolation signal conversion circuit which are sequentially connected and used for monitoring the pinhole detection controller circuit, capturing high-voltage driving voltage, obtaining a direct current pulse signal after voltage reduction and rectification, sending the direct current pulse signal to the main controller, recording and capturing an online starting signal by the main controller and analyzing signal characteristics.
Preferably, the analog high-frequency signal short-circuit module comprises a single chip microcomputer unit and a peripheral input/output interface, and is used for short-circuit pinhole detection of a monitoring feedback signal related to the light source state in the controller.
Preferably, the LED constant current source comprises an LED array and a chip for driving the LED array, and the chip adopts an LED constant current source management chip in a continuous inductor current conduction mode.
Preferably, the stroboscopic driving power module comprises an analog dimming circuit and a PWM dimming circuit, and can adjust the flashing frequency and brightness of the ultraviolet LED high-frequency light source according to any PWM signal sent by the main controller.
Preferably, the ultraviolet LED high-frequency light source comprises a circuit substrate and ultraviolet LED lamp beads, the five ultraviolet LED lamp beads are distributed in an array mode and are fixed on the circuit substrate in a surface SMT and plug-in DIP hybrid welding mode, the circuit substrate is a double-layer glass fiber board, and a power/signal interface and a power parallel connection interface are arranged on the circuit substrate.
Preferably, the circuit board is provided with a light-sensitive detection sensor.
Due to the structure, the invention has the advantages that:
the device is grafted on an imported original instrument by utilizing mature electronic technologies such as photoelectric coupling isolation and the like, and halogen light sources are replaced by utilizing technologies such as LEDs and the like, so that the defects of high temperature and high pressure of the original instrument, short service life of the light sources, low energy efficiency, high price and the like are overcome. The device has the remarkable advantages of low temperature, low pressure, low load, no ozone, no interference, strong controllability, low manufacturing cost and the like, and has simple and practical structure, low cost and easy popularization.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a main controller according to the present invention;
FIG. 3 is a schematic structural diagram of an ultraviolet LED high-frequency light source according to the present invention;
fig. 4 is a schematic block diagram of the circuit of the present invention.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. 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.
As shown in fig. 1 to 4, the present embodiment provides a grafting system for an ultraviolet strip steel pinhole detector and a supporting LED light source, including a pinhole detection unit 7 and a pinhole detection controller 8 connected to each other in the prior art, and the specific structure and connection relationship thereof are not described again. The device further comprises a main controller 1, an isolation voltage reduction grafting signal capturing unit 2, a simulation high-frequency signal short-circuit module 3, an LED constant current source 4, a stroboscopic driving power module 5 and an ultraviolet LED high-frequency light source 6. Main control unit 1 is connected with pinhole detection controller 8 through keeping apart step-down grafting signal capture unit 2, simulation high frequency signal short circuit module 3, is connected with ultraviolet LED high frequency light source 6 through LED constant current source 4, stroboscopic drive power module 5. Specifically, the isolation voltage reduction grafting signal capturing unit 2 and the analog high-frequency signal short-circuit module 3 are respectively connected between the pinhole detection controller 8 and the main controller 1 through cables. The LED constant current source 4, the stroboscopic driving power module 5 and the ultraviolet LED high-frequency light source 6 are arranged on the installation position of the original halogen light source bin. The three are connected with each other by a direct plug interface mode and are respectively connected with the main controller 1 by cables. The pinhole detection unit 7 and the ultraviolet LED high-frequency light source 6 are respectively arranged at two sides of a band steel pinhole 11 of the cold-rolled band steel 10.
Wherein:
the main controller 1 is installed near the original equipment (imported original equipment) for convenient fixing and wiring, and is used for receiving all external input signals, performing centralized operation processing, and then sending output logic signals to the external driving and load light source unit. After receiving the starting signal sent by the pinhole detection system, making a corresponding judgment and immediately sending the processed starting signal to the light source unit so that the light source unit synchronously sends out high-frequency flickering ultraviolet light at the preset frequency and starting time point of the pinhole detection system. Therefore, the method perfectly simulates the flicker frequency and the starting time point of the original imported halogen ultraviolet lamp tube, and keeps synchronization with the calculation reference of the speed/length of the strip steel of the continuous production line. The delay of the calculation of the length of the strip steel caused by signal error or starting time point delay due to phase difference is avoided
In this embodiment, the main controller 1 includes a single chip, a high-frequency isolation circuit connected to the single chip, a three-terminal voltage stabilizing circuit, a switching power supply module, a communication interface, and a signal access port output port, and is configured to receive a start signal sent by the isolation voltage-reduction grafting signal capturing unit 2, analyze the start signal, and output an LED light source start signal to the ultraviolet LED high-frequency light source 6. The output end of the singlechip is connected with the communication interface and is connected with the drive circuit through the communication interface.
In this embodiment, the single chip is provided with an HT1621BLCD integrated driver chip and an N76E003AT 208-bit microcontroller chip.
IN this embodiment, the main controller 1 is provided with a parameter setting display LCD 13 specially used for displaying characteristics of driving pulse signals, including related technology setting parameters such as duty ratio, frequency, etc., a light source parameter setting keyboard 14, a light source fault display lamp 12, an isolated step-down signal capture data IN (input) interface 15, an analog high-frequency signal short-circuit module 3OUT (output) interface 16, a light source power supply output interface 17, a stroboscopic driving and fault signal feedback I/O (input/output) interface 18, and a main power supply interface 19.
The isolation voltage reduction grafting signal capturing unit 2 comprises a resistor array, a voltage reduction circuit, a diode rectifying circuit and a photoelectric coupling isolation signal conversion circuit which are sequentially connected, is used for monitoring an inlet original pinhole detection controller 8 circuit and capturing high-voltage driving voltage, and obtains direct current pulse signals after voltage reduction and rectification, and the direct current pulse signals are transmitted to the device main controller 1 through an isolation voltage reduction signal capturing data IN (input) interface 15 and are recorded by a single chip microcomputer of the device main controller 1 to capture online starting signals and analyze signal characteristics.
The analog high-frequency signal short-circuit module 3 comprises a single chip microcomputer unit and a peripheral input/output interface, an analog signal sent by the main controller 1 is connected to the imported original pinhole detection controller 8 through an analog high-frequency signal short-circuit module OUT (output) interface 16, and the analog high-frequency signal short-circuit module is used for monitoring a feedback signal about the light source state in the short-circuit pinhole detection controller 8. Because the driving and detecting mode of the original halogen ultraviolet light source can not be completely transplanted to the LED light source, the original machine light source detecting unit needs to be shielded, and the condition that the machine can not report errors due to the absence of the light source so as to interrupt the whole control flow and report errors is met.
The LED constant current source 4 comprises an LED array and a chip for driving the LED array, the chip adopts an LED constant current power source management chip in a continuous inductive current conduction mode, and 24v voltage output by the main controller 1 is connected through a light source power source output interface 17. The input voltage ranges from 6v to 30 v. The output current is adjustable. The maximum can reach 1.2A. For lighting and driving the LED light source. The current-voltage characteristic of the LED has the characteristic of negative temperature coefficient only because the LED is a diode. A change in current may also result during the temperature rise. The constant current source has the function of limiting the current rise caused by temperature rise, thereby protecting the LED and enabling the LED to stably emit light for a long time.
Stroboscopic drive power module 5 is including simulation dimmer circuit and PWM dimmer circuit, and the PWM signal of output with main control unit 1 is through stroboscopic drive and fault signal feedback I/O (input/output) interface 18 connection, can show LCD screen 13 according to the setting parameter on main control unit 1, and arbitrary PWM signal that light source parameter set keyboard 14 set up adjusts the flicker frequency and the luminance of ultraviolet LED high frequency light source 6, makes the LED light source be in within a relatively reasonable consumption range, extension LED life. And the receiving light intensity interval of the pinhole instrument detection unit can be adjusted in a wide range so as to be reasonably butted.
The ultraviolet LED high-frequency light source 6 comprises a circuit substrate and ultraviolet LED lamp beads, wherein five ultraviolet LED lamp beads are distributed in an array mode and are fixed on the circuit substrate in a surface SMT and plug-in DIP hybrid welding mode, the circuit substrate is a double-layer glass fiber board, and a power/signal interface 22/23 and a power parallel connection interface 26 are arranged on the circuit substrate. In the present embodiment, the circuit board is provided with the light-sensitive detection sensor 24. And the power supply and the driving signal for receiving the LED constant current source 4 and the stroboscopic driving power module 5 are used for emitting high-frequency flickering ultraviolet light to irradiate the strip steel to be detected. The light sensing sensor 24 is used for monitoring the lighting state and brightness of the light source, and transmitting the light to the main controller 1 through the stroboscopic drive and fault signal feedback I/O (input/output) interface 18, and the current lighting state is displayed by the light source fault display lamp 12. It can be judged whether the light source is normally lit. If the light source is not normally lit, the light source failure display lamp 12 will display a red light, and the main controller 1 will turn off the light source power supply circuit after a few seconds and then enter the maintenance mode. And the engineering maintenance personnel replace or remove the fault of the light source according to the relevant operation flow.
The working principle of the structure is as follows:
the isolation voltage-reduction grafting signal capturing unit 2 reduces and modulates high-voltage driving voltage of a pinhole detection controller 8 into a low-voltage signal, the low-voltage signal is transmitted to a main controller 1, a single chip microcomputer sends out a corresponding high-frequency flicker pulse signal, the high-frequency flicker pulse signal is transmitted to an LED constant current source 4 and a stroboscopic driving power module 5, an ultraviolet LED high-frequency light source 6 is driven and controlled to flicker at the same frequency, meanwhile, the pinhole detection unit 7 is started to detect pinholes, a detection structure is transmitted to the pinhole detection controller 8, a high-frequency signal short-connection module 3 is simulated to short-circuit a monitoring feedback signal about the light source state in the pinhole detection controller 8, the pinhole detection controller 8 communicates signals of related monitoring feedback units on an original machine with the machine, and therefore compatibility fault alarm cannot occur, and then the autonomous ultraviolet LED high-frequency light source 6 perfectly and equivalently replaces an imported halogen ultraviolet light source.
The LED energy-saving device combines the great advantages of the LED in environmental protection, service life and energy efficiency, does not need to purchase and install a new machine again, and is optimized and upgraded on the basis of the original instrument. And greatly reduces the use cost of the consumable materials of the factory. Simple and easy to implement, and convenient to implement. Breaks the technical barrier set by overseas manufacturers of the equipment for a long time. Not only remains the high-precision detection system of the imported instrument equipment, but also greatly reduces the use cost of consumables. Therefore, the dependence on overseas imported light sources which are expensive to import for a long time is not needed. Is easy to popularize. The market prospect is good.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an ultraviolet belted steel pinhole detector grafting system and supporting LED light source, pinhole detecting element and pinhole detection control ware of interconnect in the prior art, its characterized in that: the device also comprises a main controller, an isolation voltage-reduction grafting signal capturing unit, a high-frequency signal short-circuit simulation module, an LED constant current source, a stroboscopic driving power module and an ultraviolet LED high-frequency light source;
the main controller is connected with the pinhole detection controller through an isolation voltage reduction grafting signal capturing unit and a simulation high-frequency signal short-circuit module, and is connected with the ultraviolet LED high-frequency light source through an LED constant current source and a stroboscopic driving power module.
2. The ultraviolet steel band pinhole detector grafting system and the matched LED light source of claim 1, wherein the system comprises: the main controller comprises a single chip microcomputer, a high-frequency isolation circuit connected with the single chip microcomputer, a three-terminal voltage stabilizing circuit, a switching power supply module, a communication interface, a signal access port and an output port, and is used for outputting an LED light source starting signal to the ultraviolet LED high-frequency light source after receiving a starting signal sent by the isolation voltage reduction grafting signal capturing unit and analyzing and processing the starting signal.
3. The ultraviolet band steel pinhole detector grafting system and the matched LED light source according to claim 2, wherein the system comprises: the single chip microcomputer is internally provided with an HT1621BLCD integrated drive chip and an N76E003AT208 bit microcontroller chip.
4. The grafting system of the ultraviolet band steel pinhole detector and the matched LED light source according to claim 1 or 2, characterized in that: and the main controller is provided with an LCD display screen, a keyboard and a light source fault display lamp.
5. The ultraviolet steel band pinhole detector grafting system and the matched LED light source of claim 1, wherein the system comprises: the isolation voltage reduction grafting signal capturing unit comprises a resistor array, a voltage reduction circuit, a diode rectifying circuit and a photoelectric coupling isolation signal conversion circuit which are sequentially connected and is used for monitoring a pinhole detection controller circuit, capturing high-voltage driving voltage, obtaining a direct current pulse signal after voltage reduction and rectification, sending the direct current pulse signal to a main controller, recording and capturing an online starting signal by the main controller and analyzing signal characteristics.
6. The ultraviolet steel band pinhole detector grafting system and the matched LED light source of claim 1, wherein the system comprises: the analog high-frequency signal short-circuit module comprises a single chip microcomputer unit and a peripheral input/output interface and is used for monitoring feedback signals about the light source state in the short-circuit pinhole detection controller.
7. The ultraviolet steel band pinhole detector grafting system and the matched LED light source of claim 1, wherein the system comprises: the LED constant current source comprises a chip for driving the LED array, and the chip adopts an LED constant current power source management chip in a continuous inductive current conduction mode.
8. The ultraviolet steel band pinhole detector grafting system and the matched LED light source of claim 1, wherein the system comprises: the stroboscopic driving power module comprises an analog dimming circuit and a PWM dimming circuit, and can adjust the flashing frequency and the brightness of the ultraviolet LED high-frequency light source according to any PWM signal sent by the main controller.
9. The ultraviolet steel band pinhole detector grafting system and the matched LED light source of claim 1, wherein the system comprises: the ultraviolet LED high-frequency light source comprises a circuit substrate and an ultraviolet LED lamp bead. Five ultraviolet LED lamp beads are distributed in an array mode and fixed on a circuit substrate in a surface SMT and plug-in DIP hybrid welding mode, the circuit substrate adopts a double-layer glass fiber board, and a power/signal interface and a power parallel connection interface are arranged on the circuit substrate.
10. The ultraviolet light strip steel pinhole detector grafting system and the matched LED light source according to claim 9, wherein the system comprises: the circuit substrate is provided with a light sensation detection sensor.
CN202210184970.6A 2022-02-28 2022-02-28 Grafting system of ultraviolet strip steel pinhole detector and matched LED light source Pending CN114527136A (en)

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CN202210184970.6A CN114527136A (en) 2022-02-28 2022-02-28 Grafting system of ultraviolet strip steel pinhole detector and matched LED light source

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CN202210184970.6A CN114527136A (en) 2022-02-28 2022-02-28 Grafting system of ultraviolet strip steel pinhole detector and matched LED light source

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115326725A (en) * 2022-09-13 2022-11-11 上海博取仪器有限公司 Chemical oxygen demand detection system with automatic switching of high and low measuring ranges

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115326725A (en) * 2022-09-13 2022-11-11 上海博取仪器有限公司 Chemical oxygen demand detection system with automatic switching of high and low measuring ranges
CN115326725B (en) * 2022-09-13 2024-05-14 上海博取仪器有限公司 Chemical oxygen demand detecting system capable of automatically switching high range and low range

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