CN111736089A - UV-LED lamp bead energy compensation and lamp bead fault detection device and method - Google Patents
UV-LED lamp bead energy compensation and lamp bead fault detection device and method Download PDFInfo
- Publication number
- CN111736089A CN111736089A CN201910210416.9A CN201910210416A CN111736089A CN 111736089 A CN111736089 A CN 111736089A CN 201910210416 A CN201910210416 A CN 201910210416A CN 111736089 A CN111736089 A CN 111736089A
- Authority
- CN
- China
- Prior art keywords
- data
- module
- energy
- real
- constant current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/44—Testing lamps
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D25/00—Control of light, e.g. intensity, colour or phase
- G05D25/02—Control of light, e.g. intensity, colour or phase characterised by the use of electric means
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Abstract
The invention discloses a device and a method for UV-LED lamp bead energy compensation and lamp bead fault detection, wherein the device has a lamp bead energy compensation function, prolongs the service time of UV-LED lamp beads, improves the utilization rate, has a UV-LED lamp bead short circuit and open circuit fault detection function, adopts a normalized design, can meet the use requirement of UV-LED modules with different parameters without changing the circuit structure by adjusting the setting parameters, shortens the development period and reduces the development cost.
Description
Technical Field
The invention relates to the technical field of UVLE lamp beads, in particular to a device and a method for energy compensation and lamp bead fault detection of a UV-LED lamp bead.
Background
The UV-LED lamp beads are more and more widely applied with the advantages of energy conservation, environmental protection, rapidness, high efficiency, flexible design and the like, such as ink solidification in the printing process, sterilization and bacteriostasis treatment of large air and water purification equipment and the like, the power of the UV-LED lamp beads required by the equipment is large, and because the power of a single UV-LED lamp bead is within 10W at present and is only a few W, a plurality of modules are generally designed in parallel in the design of the current product, and one module is formed by connecting a plurality of LED lamp beads in series and in parallel, so that the high power is realized.
The prior art mainly has the following problems:
as shown in fig. 1, which is a graph of correspondence between UV-LED bead radiation energy and time, as the UV-LED usage time increases, under the condition of the same current magnitude, the radiation dose of the UV-LED is decreasing, and when the radiation dose of the UV-LED is decreased to a certain degree, the radiation dose of the UV-LED cannot meet the usage requirement, which means that the UV-LED fails or has a lifetime end, where the radiation illuminance is the radiation energy projected onto a unit area in a unit time.
In a driving circuit and an application occasion for multiple groups of UV-LEDs, when one or more groups of LEDs work simultaneously, open-circuit and short-circuit faults occur on any one UV-LED lamp bead, and if the open-circuit and short-circuit faults are not detected or not found and repaired or shut down in time, the faults of the module can be caused, further faults of the related driving circuit and adjacent modules are caused, the performance is reduced or the adjacent modules are completely failed, and huge losses are caused.
Disclosure of Invention
In order to solve the problems, the invention provides a UV-LED lamp bead energy compensation and lamp bead fault detection device and a method thereof, which have the lamp bead energy compensation function, prolong the service time of the UV-LED lamp bead, improve the utilization rate, have the short circuit and open circuit fault detection functions of the UV-LED lamp bead, adopt the normalized design, aim at UV-LED modules with different parameters, do not need to change the circuit structure, can meet the use requirements by adjusting the set parameters, shorten the development period and reduce the development cost.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a UV-LED lamp pearl energy compensation and lamp pearl trouble detection device which characterized in that: the method comprises the following steps:
the UV-LED module is formed by connecting a plurality of UVLED lamp bead strings in parallel, and each lamp bead string is formed by connecting a plurality of UV-LED lamp beads in series;
the constant current circuit receives a control signal of the MCU control module and outputs the duty ratio of a corresponding PWM signal so as to regulate the input current of the UV-LED module;
the current acquisition module is used for acquiring current data output to the UV-LED module by the constant current circuit and sending the current data to the MCU control module;
the voltage acquisition module is used for acquiring voltage data at two ends of the UV-LED module and sending the voltage data to the MCU control module;
the UV energy tester is used for collecting energy data radiated by the UV-LED module and sending the energy data to the MCU control module;
the MCU control module is used for receiving data collected by the current collection module, the voltage collection module and the UV energy tester, presetting conditions for judging faults of the UV-LED module and compensating light radiation energy, comparing the collected data with the preset judgment conditions, and outputting corresponding control signals to the constant current circuit according to comparison results;
the constant current circuit is externally connected with a driving power supply, the output end of the constant current circuit is connected with the UV-LED module, the output ends of the current acquisition module, the voltage acquisition module and the UV energy tester are connected with the input end of the MCU control module, and the control output end of the MCU control module is connected with the input end of the constant current circuit.
In order to achieve the purpose, the invention adopts another technical scheme that: a UV-LED lamp bead energy compensation and lamp bead fault detection method is characterized by comprising the following steps:
a. the current acquisition module acquires current data of the output end of the constant current circuit, the voltage acquisition module acquires voltage data of two ends of the UV-LED module, and the UV energy tester acquires energy data radiated by the UV-LED module;
b. b, sending the data collected in the step a to an MCU control module for processing;
comparing the acquired data with preset conditions for judging the faults of the UV-LED module and compensating the light radiation energy by the MCU control module;
and d, outputting a control signal to the constant current circuit by the MCU control module according to the comparison result, and controlling the magnitude of the output current of the constant current circuit so as to perform energy compensation and/or lamp bead fault detection on the UV-LED module.
Specifically, the energy compensation steps of the UV-LED module are as follows:
the UV energy tester collects real-time energy data radiated by the UV-LED module and sends the real-time energy data to the MCU control module for processing;
f. when the MCU control module judges that the collected real-time energy radiated by the UV-LED module is not more than the preset radiation energy value, a control signal is output to the constant current circuit, the radiation power is increased along with the increase of the current, the output current of the constant current circuit is increased, and the real-time energy radiated by the UV-LED module is equal to the preset value
Specifically, the UV-LED module fault detection comprises open circuit fault detection, and the detection steps are as follows:
g. the voltage acquisition module acquires real-time voltage data at two ends of the UV-LED module in real time, and the current acquisition module acquires real-time current data at the output end of the constant current circuit in real time and simultaneously transmits the real-time current data to the MCU control module for processing;
h. when the MCU control module judges that the acquired real-time voltage data are smaller than the preset voltage data and the real-time current data are consistent with the preset current data, a control signal is output to the constant current circuit to control the output current of the constant current circuit to be 0.
Specifically, the UV-LED module fault detection comprises short-circuit fault detection, and the detection steps are as follows:
i. the voltage acquisition module acquires real-time voltage data at two ends of the UV-LED module in real time and sends the real-time voltage data to the MCU control module for processing;
j. when the MCU control module judges that the acquired real-time voltage data are larger than the preset voltage data and the real-time current data are consistent with the preset current data, a control signal is output to the constant current circuit to control the output current of the constant current circuit to be 0.
The invention has the beneficial effects that:
the MCU control module improves the radiation energy of the UV-LED module by increasing the current output by the constant current circuit, realizes energy compensation, meets the use requirement, prolongs the service time of the UV-LED module and improves the utilization rate.
2. The UV-LED lamp bead short circuit and open circuit fault detection function is achieved, the normalization design is adopted, the circuit structure is not required to be changed aiming at UV-LED modules with different parameters, and the use requirements can be met by adjusting the set parameters.
Drawings
FIG. 1 is a diagram of the correspondence between UV-LED lamp bead radiation energy and time;
FIG. 2 is a graph of volt-ampere characteristics of a UV-LED lamp bead;
fig. 3 is a circuit diagram of the invention.
Detailed Description
The present invention is further illustrated by the following specific examples.
Referring to fig. 3, the present invention provides a UV-LED lamp bead energy compensation and lamp bead failure detection apparatus, including:
the UV-LED module is formed by connecting a plurality of UVLED lamp bead strings in parallel, and each lamp bead string is formed by connecting a plurality of UV-LED lamp beads in series;
the constant current circuit receives a control signal of the MCU control module and outputs the duty ratio of a corresponding PWM signal so as to regulate the input current of the UV-LED module;
the current acquisition module is used for acquiring current data output to the UV-LED module by the constant current circuit and sending the current data to the MCU control module;
the voltage acquisition module is used for acquiring voltage data at two ends of the UV-LED module and sending the voltage data to the MCU control module;
the UV energy tester is used for collecting energy data radiated by the UV-LED module and sending the energy data to the MCU control module;
the MCU control module is used for receiving data collected by the current collection module, the voltage collection module and the UV energy tester, presetting conditions for judging faults of the UV-LED module and compensating light radiation energy, comparing the collected data with the preset judgment conditions, and outputting corresponding control signals to the constant current circuit according to comparison results;
the constant current circuit is externally connected with a driving power supply, the output end of the constant current circuit is connected with the UV-LED module, the output ends of the current acquisition module, the voltage acquisition module and the UV energy tester are connected with the input end of the MCU control module, and the control output end of the MCU control module is connected with the input end of the constant current circuit.
The specific fault detection function implementation of the invention is as follows:
the first step is as follows: the UV-LED module is formed by connecting N1 UV-LED lamp beads in series and parallel, wherein one lamp bead string is formed by connecting N2 UV-LED lamp beads in series, namely the UV module is formed by connecting N1 by N2 lamp beads; the voltage of each UV-LED lamp bead is U and the current is I, the voltage of the UV-LED module is U1 ═ N2 ═ U, and the current of the UV-LED module is I1 ═ N1 ═ I;
the second step is that: when some UV-LED lamp beads are in open circuit and short circuit faults due to some reasons in the use process of the UV-LED module, if the fault occurrence positions cannot be detected in time, the faults can be enlarged, and more UV-LED lamp beads are damaged. Therefore, in order to avoid the situation and enable the UV-LED lamp beads to work stably for a longer time as much as possible, the invention realizes the detection of current and voltage parameters in the UV-LED driving circuit;
the third step: when short circuit fault appears in single UV-LED lamp pearl, module voltage is (N2-1) U for U2 ═ U, and the voltage variation at module both ends is U, and MCU control system detects module voltage variation in real time and is U, judges that there is the lamp pearl to damage, and control constant current circuit output current is 0 for UV-LED lamp pearl extinguishes and gives fault signal simultaneously, has realized trouble real-time detection and lamp pearl protect function. Similarly, the short circuit fault of a plurality of UV-LED lamp beads can be detected in real time.
The fourth step: when the single UV-LED lamp bead has an open circuit fault, the lamp bead string is also open circuit, and no current flows through the lamp bead string; since the current of the constant current circuit is unchanged, the current I of the lamp string is shared by the other (N1-1) lamp strings. Therefore, the current of other lamp bead strings can be increased, as shown in fig. 2, according to the volt-ampere characteristic of the UV-LED lamp bead, the current is increased, the voltage variation quantity at two ends of the UV-LED module is U3, the MCU control system detects that the voltage variation quantity of the module is U in real time, the lamp bead damage is judged, the output current of the constant current circuit is controlled to be 0, the UV-LED lamp bead is extinguished, meanwhile, a fault signal is given, and the functions of fault real-time detection and lamp bead protection are achieved. Similarly, the open circuit fault of a plurality of UV-LED lamp beads can be detected in real time.
And fifthly, judging that a fault signal given by the lamp bead fault is a dry node signal by the MCU control system, externally controlling other electrical equipment, and informing other equipment to stop so as to realize a fault protection function.
The specific functional implementation of the energy compensation of the invention is as follows:
the first step is as follows: the UV energy tester collects real-time energy data radiated by the UV-LED module and sends the real-time energy data to the MCU control module for processing;
the second step is that: as shown in the attached drawing 1, along with the increase of the service time of the UV-LED lamp bead, under the condition of the same current, the energy of the UV-LED module is attenuated, when the MCU control module judges that the collected real-time energy radiated by the UV-LED module is not greater than the preset radiation energy value, a control signal is output to the constant current circuit to increase the output current of the constant current circuit, and along with the increase of the current, the radiation power is increased to make the real-time energy radiated by the UV-LED module equal to the preset value, thereby realizing the energy compensation function, prolonging the service time of the UV-LED lamp bead, and improving the utilization rate. .
The above embodiments are merely illustrative of the preferred embodiments of the present invention, and not restrictive, and various changes and modifications to the technical solutions of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are intended to fall within the scope of the present invention defined by the appended claims.
Claims (5)
1. The utility model provides a UV-LED lamp pearl energy compensation and lamp pearl trouble detection device which characterized in that: the method comprises the following steps:
the UV-LED module is formed by connecting a plurality of UVLED lamp bead strings in parallel, and each lamp bead string is formed by connecting a plurality of UV-LED lamp beads in series;
the constant current circuit receives a control signal of the MCU control module and outputs the duty ratio of a corresponding PWM signal so as to regulate the input current of the UV-LED module;
the current acquisition module is used for acquiring current data output to the UV-LED module by the constant current circuit and sending the current data to the MCU control module;
the voltage acquisition module is used for acquiring voltage data at two ends of the UV-LED module and sending the voltage data to the MCU control module;
the UV energy tester is used for collecting energy data radiated by the UV-LED module and sending the energy data to the MCU control module;
the MCU control module is used for receiving data collected by the current collection module, the voltage collection module and the UV energy tester, presetting conditions for judging faults of the UV-LED module and compensating light radiation energy, comparing the collected data with the preset judgment conditions, and outputting corresponding control signals to the constant current circuit according to comparison results;
the constant current circuit is externally connected with a driving power supply, the output end of the constant current circuit is connected with the UV-LED module, the output ends of the current acquisition module, the voltage acquisition module and the UV energy tester are connected with the input end of the MCU control module, and the control output end of the MCU control module is connected with the input end of the constant current circuit.
2. A method of fault detection and energy compensation for the apparatus of claim 1, comprising the steps of:
a. the current acquisition module acquires current data of the output end of the constant current circuit, the voltage acquisition module acquires voltage data of two ends of the UV-LED module, and the UV energy tester acquires energy data radiated by the UV-LED module;
b. b, sending the data collected in the step a to an MCU control module for processing;
comparing the acquired data with preset conditions for judging the faults of the UV-LED module and compensating the light radiation energy by the MCU control module;
and d, outputting a control signal to the constant current circuit by the MCU control module according to the comparison result, and controlling the magnitude of the output current of the constant current circuit so as to perform energy compensation and/or lamp bead fault detection on the UV-LED module.
3. The method of claim 2, wherein the UV-LED module energy compensation step is as follows:
the UV energy tester collects real-time energy data radiated by the UV-LED module and sends the real-time energy data to the MCU control module for processing;
f. when the MCU control module judges that the collected real-time energy radiated by the UV-LED module is not greater than the preset radiation energy value, a control signal is output to the constant current circuit, the output current of the constant current circuit is increased, the radiation power is increased along with the increase of the current, and the real-time energy radiated by the UV-LED module is equal to the preset value.
4. The method of claim 2, wherein the UV-LED module fault detection comprises open circuit fault detection, the detecting steps comprising:
g. the voltage acquisition module acquires real-time voltage data at two ends of the UV-LED module in real time, and the current acquisition module acquires real-time current data at the output end of the constant current circuit in real time and simultaneously transmits the real-time current data to the MCU control module for processing;
h. when the MCU control module judges that the acquired real-time voltage data are smaller than the preset voltage data and the real-time current data are consistent with the preset current data, a control signal is output to the constant current circuit to control the output current of the constant current circuit to be 0.
5. Method according to claim 2 or 4, wherein UV-LED module fault detection comprises short circuit fault detection, the detection steps being as follows:
i. the voltage acquisition module acquires real-time voltage data at two ends of the UV-LED module in real time and sends the real-time voltage data to the MCU control module for processing;
j. when the MCU control module judges that the acquired real-time voltage data are larger than the preset voltage data and the real-time current data are consistent with the preset current data, a control signal is output to the constant current circuit to control the output current of the constant current circuit to be 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910210416.9A CN111736089A (en) | 2019-03-20 | 2019-03-20 | UV-LED lamp bead energy compensation and lamp bead fault detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910210416.9A CN111736089A (en) | 2019-03-20 | 2019-03-20 | UV-LED lamp bead energy compensation and lamp bead fault detection device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111736089A true CN111736089A (en) | 2020-10-02 |
Family
ID=72645722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910210416.9A Pending CN111736089A (en) | 2019-03-20 | 2019-03-20 | UV-LED lamp bead energy compensation and lamp bead fault detection device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111736089A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023036298A1 (en) * | 2021-09-10 | 2023-03-16 | 长春捷翼汽车零部件有限公司 | Control circuit capable of detecting short circuit and open circuit of led, and charging base and electric vehicle |
| CN117358552A (en) * | 2023-12-08 | 2024-01-09 | 常州铭赛机器人科技股份有限公司 | Automatic spot inspection compensation method for energy of UV lamp |
-
2019
- 2019-03-20 CN CN201910210416.9A patent/CN111736089A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023036298A1 (en) * | 2021-09-10 | 2023-03-16 | 长春捷翼汽车零部件有限公司 | Control circuit capable of detecting short circuit and open circuit of led, and charging base and electric vehicle |
| CN117358552A (en) * | 2023-12-08 | 2024-01-09 | 常州铭赛机器人科技股份有限公司 | Automatic spot inspection compensation method for energy of UV lamp |
| CN117358552B (en) * | 2023-12-08 | 2024-02-23 | 常州铭赛机器人科技股份有限公司 | Automatic spot inspection compensation method for energy of UV lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202632722U (en) | LED drive circuit | |
| US8981654B2 (en) | LED centralized DC power supply system and operating methods thereof | |
| CN102711321B (en) | Light emitting diode driving circuit | |
| US20130328404A1 (en) | Voltage conversion apparatus, power generation system, and voltage conversion method | |
| KR101789946B1 (en) | Led backlight system and display apparatus | |
| CN111736089A (en) | UV-LED lamp bead energy compensation and lamp bead fault detection device and method | |
| KR102283826B1 (en) | PV module serial/parallel conversion system for MPPT operating voltage optimization based on machine learning | |
| CN105610333A (en) | Systems, methods, and apparatus for operating a power converter | |
| CN101815386A (en) | LED lamp and control circuit thereof | |
| CN109375761A (en) | A kind of server energy conservation method of supplying power to and system based on redundant power | |
| CN106658838A (en) | Lighting device, control chip, linear dimming system and linear dimming method | |
| CN101827478A (en) | Energy recovering system driven by multi-path parallelly-connected LEDs | |
| CN116916489A (en) | LED light intelligent controller | |
| CN105307350A (en) | Long-service lifetime intelligent constant-current light-modulating driving power supply of LED street lamps | |
| CN102891523B (en) | Aging control method and system for electrical energy self-circulation type high-power charger | |
| CN101908977B (en) | Network equipment, power supply management method and system of network equipment | |
| CN113675892A (en) | Photovoltaic power generation system, control method thereof and power converter | |
| CN108667290A (en) | A kind of dedicated DC-DC12V25A converters of electric vehicle with electric switch lock function | |
| CN210725428U (en) | Multiplexed output modularization UV LED power | |
| CN107750076A (en) | A kind of LED drive circuit | |
| CN107317481A (en) | A kind of multistage DC DC converters, supply unit and display device | |
| CN207897177U (en) | A kind of LED drive circuit | |
| CN109995014A (en) | A kind of optical-fiber network constant current Remote Power Supply Pressure and Control system and method | |
| CN212381430U (en) | Phase-cut dimming input signal detection circuit | |
| CN101861015A (en) | LED light bar protective circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |