CN108819471B - Distributed UVA curing control system - Google Patents
Distributed UVA curing control system Download PDFInfo
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- CN108819471B CN108819471B CN201810402140.XA CN201810402140A CN108819471B CN 108819471 B CN108819471 B CN 108819471B CN 201810402140 A CN201810402140 A CN 201810402140A CN 108819471 B CN108819471 B CN 108819471B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/0486—Particular types of dryers
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Abstract
A distributed UVA cure control system, comprising: a centralized controller 1; the working channels are connected with the centralized controller 1; the integrated controller 1 is a Programmable Logic Controller (PLC) or a single chip microcomputer; the human-computer interface module 2 is used for setting working channel parameters and displaying the working state of the working channel and is connected with the centralized controller 1; and the power supply detection and emergency braking module 3 is connected with the integrated controller 1, and after the power supply detection and emergency braking module 3 detects that the power supply is abnormal or receives an emergency braking signal, the power supply detection and emergency braking module sends a closing output signal to the integrated controller 1.
Description
Technical Field
The invention relates to the field of UVA curing control, in particular to a distributed UVA curing control system.
Background
At present, UV mercury lamps are mainly sampled in the printing industry for photocuring, the defects of large power consumption, short service life of the mercury lamps, mercury-containing products and the like exist, and various printing manufacturers seek energy-saving substitute products all the time to reduce the operation cost.
Compared with the prior UV mercury lamp, the UVA LED lamp has the advantages of long service life, no mercury, capability of realizing instantaneous switching and no influence of the ambient temperature on the output power, so that the UVA LED lamp is used for replacing the traditional mercury lamp to become the first choice in the printing industry. However, the UVA LED also has its inherent limitation, and the UVA LED curing light source needs to work in a heavy current environment to achieve high light intensity output, so that the lamp beads have high distribution density and heat is not easily dissipated, and especially when the current of the LED power supply or the AC power supply is too large, if there is no current and power limitation in time, the lamp beads are easily overheated and become invalid (the lamp beads are burned out); the lead of a chip in the UVA LED cannot bear severe temperature change, otherwise, mechanical impact caused by temperature is easily caused, the lead is broken under extreme conditions, and lamp beads fail; in addition, the UVA LED lamp bead internally contains fixed parts such as solder, glue, optical lens and the like, and partial materials can accelerate the performance attenuation under the condition of severe temperature change, so that the problem of careful reliability of light attenuation is caused. Therefore, the working current and temperature change conditions of the UVA LED are strictly controlled, rapid overcurrent protection is realized, and the UVA LED overcurrent protection circuit plays a vital role in reducing UVA LED failure or severe light attenuation.
The invention provides a UV curing lamp ventilation equipment control system which is named as a Chinese patent publication No. CN 206709026U in 2017, 12 and 05, and the application discloses a UV curing lamp ventilation equipment control system which comprises a PLC (programmable logic controller), a UV curing lamp, a switch unit, an execution unit, ventilation equipment and an acousto-optic alarm. The ultraviolet A LED curing lamp has the defect that independent control of the UVA LED curing lamp cannot be performed in combination with conditions of an irradiation area, ink color difference, a type and the like of an actual printed matter.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, current and power limitation and temperature change cannot be accurately controlled, UVA LED lamp beads are prone to failure and the like, and provides a distributed UVA curing control system.
The technical scheme adopted by the invention for solving the technical problems is as follows: a distributed UVA cure control system, comprising: a centralized controller 1; the working channels are connected with the centralized controller 1; the integrated controller 1 is a Programmable Logic Controller (PLC) or a single chip microcomputer; the human-computer interface module 2 is used for setting working channel parameters and displaying the working state of the working channel and is connected with the centralized controller 1; the power supply detection and emergency braking module 3 is connected with the integrated controller 1, and the power supply detection and emergency braking module 3 sends a closing output signal to the integrated controller 1 after detecting that the power supply is abnormal or receiving an emergency braking signal; the working channel comprises: a UVA light source 4; a UVA power supply 5; the UVA light source detection module 7 is used for detecting the current of the UVA light source 4 and is connected with the centralized controller 1; the UVA power supply detection module 6 is used for detecting a voltage and current signal of the UVA power supply 5 and controlling the output of the UVA light source 4 and is connected with the centralized controller 1; after receiving the output closing signal, the integrated controller 1 does not start up or closes the output of the UVA light source 4 through the UVA power detection module 6 in a working state; and the temperature control device 8 is arranged around the UVA light source 4 and used for adjusting the temperature of the UVA light source 4, and the temperature control device 8 is connected with the centralized controller 1.
In the invention, the control system comprises N independent channels, control instructions are issued through the human-computer interface module 2, independent working state setting (light-on/off/power setting/protection of voltage and current and the like) can be respectively realized under the control of the respective power detection modules, and the power and working time of each module (corresponding to an irradiation area) can be arbitrarily set to realize energy-saving maximization by combining the conditions of the irradiation area, the color difference of ink, the model and the like of an actual printed matter.
In the invention, external current and voltage detection is added on the basis of current control of the UVA power supply detection module 6, so that the stability of the system in power adjustment (loop oscillation avoidance) and the reliable operation of the system can be ensured.
Preferably, the UVA light source detection module 7 includes a temperature probe for detecting the temperature of the UVA light source 4, a UV amount detection probe for detecting the UV amount of the UVA light source 4, and a signal conversion unit.
According to the invention, the signal conversion unit converts the detected temperature signal and UV quantity signal into digital quantity, and transmits the digital quantity to the centralized controller 1 through an RS485 interface.
Preferably, the working channel parameters include, but are not limited to: operating voltage, operating current, operating sequence, protective voltage, protective current, limiting operating temperature, UVA light source radiation level, UVA light source 4 switching power and/or UVA light source 4 temperature rate of change.
Preferably, the temperature control device 8 is an air cooling device.
Preferably, the temperature control device 8 is a water cooling device.
According to the invention, the working temperature of the UVA light source 4 is adjusted by accelerating the water cooling flow rate or the rotating speed of the fan.
The invention has the beneficial effects that: (1) the control system comprises N independent channels, control instructions are issued through the human-computer interface module 2, independent working state setting (light on/off/power setting/voltage and current protection and the like) can be respectively realized under the control of the power detection modules, and the power and working time of each module (corresponding to an irradiation area) can be set at will to realize energy-saving maximization by combining the conditions of the irradiation area, the color difference of ink, the model and the like of an actual printed matter; (2) the working temperature of the UVA light source is obtained through the UVA light source temperature detection module and is compared with the set limit working temperature, when the working temperature exceeds the limit working temperature, the power of the UVA light source is reduced, the LED power supply is finally turned off, and the protection of the UVA LED limit working temperature is realized; monitoring the change rate of the working temperature of the UVA light source, limiting the temperature rise rate and the temperature fall rate of the UVA LED within a set range by adjusting the rotating speed of external air cooling or the flow and the water temperature of water cooling, avoiding severe temperature impact, reducing the light attenuation of the UV LED and prolonging the service life of the UVLED; (3) the external current and voltage detection is added on the basis that the LED driver provides current control, so that the stability of the system in power regulation (loop oscillation avoidance) and the reliable operation of the system can be ensured.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
in the figure: 1. the intelligent braking system comprises an integrated controller, a human-computer interface module, a power supply detection and emergency braking module, a UVA light source, a UVA power supply detection module, a UVA light source detection module and a temperature control device, wherein the integrated controller is 2, the human-computer interface module is 3, the power supply detection and emergency braking module is 4, the.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific examples in conjunction with the accompanying drawings.
A distributed UVA cure control system, as shown in fig. 1, comprising: a centralized controller 1; the human-computer interface module 2 is used for setting working channel parameters and displaying the working state of the working channel and is connected with the centralized controller 1; the power supply detection and emergency braking module 3 is connected with the integrated controller 1, and after the power supply detection and emergency braking module 3 detects that power supply is abnormal or receives an emergency braking signal, the power supply detection and emergency braking module sends a signal for turning off the output of the UVA light source 4 to the integrated controller 1; and the working channels are connected with the integrated controller 1, and all the working channels form a UVA LED whole lamp. The centralized controller 1 is a Programmable Logic Controller (PLC) or a single chip microcomputer.
A working channel comprising: a UVA light source 4; a UVA power supply 5; the UVA light source detection module 7 is used for detecting the current of the UVA light source 4 and is connected with the centralized controller 1; the UVA power supply detection module 6 is used for detecting a voltage and current signal of the UVA power supply 5 and controlling the output of the UVA light source 4 and is connected with the centralized controller 1; after receiving the output closing signal, the integrated controller 1 does not start up or closes the output of the UVA light source 4 through the UVA power detection module 6 in a working state; and the temperature control device 8 is arranged around the UVA light source 4 and used for adjusting the temperature of the UVA light source 4, and the temperature control device 8 is connected with the centralized controller 1.
The centralized controller 1 is connected with the human-computer interface module 2 through an RS232 interface, and sets parameters such as working voltage, working current, working time sequence, protection voltage and current, UVA light source switching power and temperature change rate of each working channel through the human-computer interface module 2, and issues information such as actual working state of each working channel.
The integrated controller 1 is in signal connection with the power supply detection and emergency braking module 3 through a GPIO, and after the power supply is detected to be abnormal or an emergency braking signal is received, the system is not started or the UVA power supply detection module 6 is controlled to stop the output of the UVA light source 4 through the integrated controller 1 immediately in a working state.
The centralized controller 1 is connected with the power supply detection module through an RS485 interface and/or related interfaces, such as CAN, MODBUS and the like, so as to realize information exchange; the power supply detection module realizes voltage and current detection of the UVA power supply 5 through a 3-wire system and is connected with the UVA power supply 5 by adopting a 2-core wire; the power supply detection module is connected with a command issued by the centralized controller 1, stores power time configuration table information and protection limit parameter values issued by the centralized controller 1, and realizes power control on the UVA power supply 5 through 0-10V signals; the power supply detection module realizes accurate measurement of the output voltage and current of the UVA power supply 5, compares the output voltage and current with set protection parameters in real time, immediately closes the output of the UVA light source 4 through a 0-10V interface once abnormality is found, and uploads abnormality information through an RS485 interface; the power detection module feeds back the detection data to the centralized controller 1 at regular time for data analysis.
The integrated controller 1 is connected with the UVA light source detection module 7 through an RS485 interface and/or a related interface, such as a CAN, and an analog-to-digital conversion unit in the UVA light source detection module 7 converts signals received by the temperature and UV amount detection probe into digital signals, and transmits the digital signals to the integrated controller 1 through the RS485 interface. The UVA power supply 5 is connected directly to the UVA light source 4 by +/-wiring to provide the energy required for operation of the UVA light source 4.
The control system comprises N independent channels, independent working state setting (light on/off/power setting/voltage and current protection and the like) can be respectively realized under the control of respective power detection modules through instructions issued by the human-computer interface module 2, and the power and working time of each module (corresponding to an irradiation area) can be set at will to realize energy-saving maximization by combining the conditions of the irradiation area, ink color difference, model and the like of an actual printed matter. Such as: ink a required 100% rated power output, ink B required 75% rated power output, and ink C required 60% rated power output. Starting all N channels when the size of the printing part occupies all the irradiation areas; if the printing part only occupies a part of the irradiation area, only corresponding channels, such as the middle 5 channels, are started; the settings are completed through the human-computer interface module 2 and are sent to the corresponding power supply detection modules by the integrated controller 1.
The integrated controller 1 obtains the working temperature of the UVA light source 4 through the UVA light source detection module 7, compares the working temperature with a set limit working temperature, reduces the power of the UVA light source 4 and finally turns off an LED power supply when the working temperature exceeds the limit working temperature, and achieves protection of the UVALED limit working temperature; the change rate of the working temperature of the UVA light source 4 is monitored, the temperature rise rate and the temperature fall rate of the UVA LED are limited within a set range by adjusting the rotating speed of external air cooling or the flow rate or the water temperature of water cooling, severe temperature impact is avoided, the light attenuation of the UV LED is reduced, and the service life of the UV LED is prolonged.
The specific implementation method comprises the following steps: if the temperature rise rate is too high, the water-cooling flow rate or the fan rotating speed is accelerated (for example, 10%), the temperature change rate is continuously monitored for about 3 minutes, if the temperature change rate meets the requirement, the water-cooling flow rate or the air-cooling fan rotating speed is fixed, otherwise, the flow rate or the air-cooling fan rotating speed is further increased; if the temperature drop rate is too fast, the water-cooling flow rate or the fan speed (for example, 10%) is reduced, and the temperature change rate is continuously monitored for about 3 minutes, if the temperature change rate is met, the water-cooling flow rate or the air-cooling fan speed is fixed, otherwise, the flow rate or the air-cooling fan speed is further reduced.
The integrated controller 1 obtains the radiation quantity of the UVA light source through the UVA light source detection module 7, compares the radiation quantity with the set radiation quantity, adjusts the output power of the UVA light source, realizes accurate control of the UVA radiation quantity, and avoids reduction of printing quality caused by light attenuation generated by long-term operation of the UVA LED.
The above-described embodiment is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the invention as set forth in the claims.
Claims (4)
1. A distributed UVA cure control system, comprising:
a centralized controller (1); the integrated controller (1) is a Programmable Logic Controller (PLC) or a single chip microcomputer;
the working channels are connected with the centralized controller (1);
the human-computer interface module (2) is used for setting parameters of the working channel and displaying the working state of the working channel and is connected with the integrated controller (1); and the number of the first and second groups,
the power supply detection and emergency braking module (3) is connected with the integrated controller (1), and the power supply detection and emergency braking module (3) sends a closing output signal to the integrated controller (1) after detecting that the power supply is abnormal or receiving an emergency braking signal;
the working channel comprises:
a UVA light source (4);
a UVA power supply (5);
the UVA light source detection module (7) is used for detecting the current of the UVA light source (4) and is connected with the centralized controller (1);
the UVA power supply detection module (6) is used for detecting a voltage current signal of the UVA power supply (5) and controlling the output of the UVA light source (4), and is connected with the centralized controller (1); after receiving the output closing signal, the integrated controller (1) does not start up or closes the output of the UVA light source (4) through the UVA power supply detection module (6) in a working state; and the number of the first and second groups,
the temperature control device (8) is arranged around the UVA light source (4) and used for adjusting the temperature of the UVA light source (4), and the temperature control device (8) is connected with the centralized controller (1);
the UVA light source detection module (7) comprises a temperature probe for detecting the temperature of the UVA light source (4), a UV quantity detection probe for detecting the UV quantity of the UVA light source (4) and a signal conversion unit.
2. The distributed UVA curing control system of claim 1, wherein said operating channel parameters include, but are not limited to: operating voltage, operating current, operating sequence, protective voltage, protective current, limiting operating temperature, UVA light source radiation level, UVA light source (4) switching power and/or UVA light source (4) temperature rate of change.
3. A distributed UVA cure control system according to claim 1, wherein the temperature control device (8) is an air-cooled device.
4. A distributed UVA cure control system according to claim 1, in which the temperature control device (8) is a water cooling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810402140.XA CN108819471B (en) | 2018-04-28 | 2018-04-28 | Distributed UVA curing control system |
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| CN201810402140.XA CN108819471B (en) | 2018-04-28 | 2018-04-28 | Distributed UVA curing control system |
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| CN108819471A CN108819471A (en) | 2018-11-16 |
| CN108819471B true CN108819471B (en) | 2020-02-28 |
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| CN109747479A (en) * | 2018-12-28 | 2019-05-14 | 芜湖鑫芯微电子有限公司 | A kind of power management chip and system of hybrid vehicle |
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| JPS5959449A (en) * | 1982-09-30 | 1984-04-05 | Toshiba Electric Equip Corp | Irradiator |
| CN105216448A (en) * | 2015-11-11 | 2016-01-06 | 尹祖文 | A kind of printing machine solidification equipment |
| CN105946348A (en) * | 2016-05-31 | 2016-09-21 | 广东阿诺捷喷墨科技有限公司 | LED-UV control system and method |
| CN206663957U (en) * | 2017-03-09 | 2017-11-24 | 武汉优炜星科技有限公司 | The ultraviolet LED cure system that a kind of light intensity automatically adjusts |
| CN206709026U (en) * | 2017-04-26 | 2017-12-05 | 江苏斯德雷特通光光纤有限公司 | A kind of UV cure lamps ventilation equipment control system |
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