CN103185869A - Device and method of monitoring scrapping of light emitting diode (LED) light source on line - Google Patents
Device and method of monitoring scrapping of light emitting diode (LED) light source on lineDownload PDFInfo
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- CN103185869A CN103185869ACN2011104559976ACN201110455997ACN103185869ACN 103185869 ACN103185869 ACN 103185869ACN 2011104559976 ACN2011104559976 ACN 2011104559976ACN 201110455997 ACN201110455997 ACN 201110455997ACN 103185869 ACN103185869 ACN 103185869A
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Abstract
Description
Technical field
The present invention relates to the led light source lighting field, relate in particular to the device and method that a kind of on-line monitoring led light source is scrapped.
Background technology
LED (Lighting Emitting Diode) is light emitting diode, also is called solid-state illumination, refers to the illumination of Sony ericsson mobile comm ab as light source.It is to utilize the solid semiconductor chip as luminescent material, by charge carrier compound energy of emitting surplus takes place and cause photo emissions in semiconductor, directly sends visible light.Characteristics such as that led light source has is energy-efficient, environmental protection, life-span length, rich color, vibration resistance, controllability are strong.
The main flow of led light source illumination is the white light LEDs of high brightness.Through the continuous improvement of technology, its luminescence efficiency has had bigger lifting, and led light source is called as " green energy resource " to have begun to permeate to the traditional lighting field gradually.Most power consumptions such as the incandescent lamp in traditional lighting field, halogen tungsten lamp, fluorescent light become thermal losses, cause the waste of resource, the LED light efficiency can be realized 100 lumens/watt at present, adds the peculiar advantage of himself, and led light source has extremely strong competitive power at lighting field.
The led light source life-span in the LED light fixture is mostly about 50,000 hours, but its brightness has during use begun decay, adds to be subjected to environment temperature, continuously service time length influence, the different in size of life of the light source of LED light fixture caused.Its life-span of inclement condition is more short, and it is more fast that luminescence efficiency decays.Led light source serviceable life that has even be lower than 20,000 hours.The light efficiency attenuation change of led light source is very slow, and human eye can't be discovered, if continue to use can not reach the brightness of illumination of standard as illuminating light fixture the time, can cause damage to people's eyesight.
Continue to use the LED light fixture that does not meet standard illuminants brightness owing to light decay for fear of people, eyesight to the people causes damage, and the present invention proposes the device and method that a kind of on-line monitoring led light source simple in structure, easy to use, that can be applicable to various led light sources is scrapped.
Summary of the invention
The objective of the invention is to overcome defective and the deficiency of prior art, the device and method that provides a kind of on-line monitoring led light source to scrap has been avoided when the LED lighting because the damage that light decay continues when not reaching standard illuminants to use the eyesight to the people to cause.
For achieving the above object, the present invention is achieved through the following technical solutions:
The device that a kind of on-line monitoring led light source is scrapped, described device comprises:
Detecting signal unit detects the intensity of led light source and carries out the signal conversion;
The signals collecting converting unit is gathered and is carried out conversion process detection signal;
The LED light decay rate that draws is handled and analyzed automatically to signal processing unit to digital signal;
Warning device, the prompting led light source is scrapped;
Wherein, detecting signal unit with the analog signal transmission that detects to the signals collecting converting unit, the signals collecting converting unit gathers and converts to digital data transmission to signal processing unit to simulating signal, signal processing unit carries out Treatment Analysis to digital signal and draws LED light decay rate, and the control warning device gives the alarm when reaching rejection value.
Further, described detecting signal unit comprises photoresistance, for detection of light intensity, and light signal is converted to electric signal output.
Further, described signal processing unit comprises programmable logic controller (PLC) spare, and described programmable logic controller (PLC) spare includes but are not limited to single-chip microcomputer, ARM, CPLD, DSP, FPGA.
Initial light intensity when further, described programmable logic controller (PLC) spare also dispatches from the factory for the storage led light source.
Further, described warning device comprises sound-producing device, display device or its combination, and wherein sound-producing device comprises hummer, and display device comprises alarm lamp.
Further, described warning device is used for being in led light source 50% below and pointing out and scrap being confirmed as the light decay rate.
Further, described device also comprises user interface, is used for to programmable logic controller (PLC) spare input information, and described user interface comprises keyboard, scrambler, button or its combination.
The present invention also discloses a kind of method that adopts described device on-line monitoring led light source to scrap, and this method comprises the steps:
S1: the largest light intensity value that online detection led light source is current also converts electric signal output to;
S2: the signals collecting converting unit is handled step S1 output signal;
S3: the signal processing unit analysis draws the light decay rate of current led light source;
S4: warning device gives the alarm and points out led light source to scrap.
Further, described method also comprises the initial light intensity when step S5 before the step S1 presets and stores led light source and dispatches from the factory.
Further, described step S1 adopts the current largest light intensity value of the online detection led light source of photoresistance and converts electric signal to and outputs to the signals collecting converting unit.
Further, processing is sampled, amplified to described step S2 signals collecting converting unit to detection signal, and the analog signal conversion after will handling is that digital signal is exported to signal processing unit.
Further, signal processing unit carries out the light decay rate that analyzing and processing draws led light source to the largest light intensity value and the initial light intensity among the step S5 that detect among the step S1 among the described step S3.
Further, warning device is scrapped the led light source prompting that is confirmed as the light decay rate and is in below 50%.
The present invention discloses the device and method that a kind of on-line monitoring led light source is scrapped, utilize photosensitive device that the luminous intensity of led light source is detected, whether scrap by the light decay rate on-line monitoring led light source of analyzing led light source, this scenario-frame is simple, easy to use, can be applied on the various LED light fixtures, but real-time online detects the light decay rate of led light source, avoided when the LED lighting because light decay continues the damage that use causes people's eyesight when not reaching standard illuminants.
Description of drawings
The present invention is described in further detail with embodiment with reference to the accompanying drawings below.
The theory diagram of the device that Fig. 1 scraps for on-line monitoring led light source of the present invention;
The method flow diagram that Fig. 2 scraps for on-line monitoring led light source of the present invention;
The detailed process process flow diagram of the method that Fig. 3 scraps for on-line monitoring led light source of the present invention.
Embodiment
Know-why of the present invention: utilize the luminous intensity of photosensitive device detection led light source and convert electric signal to, analyze the light decay rate on-line monitoring led light source of led light source by signal processing unit and whether scrap.
Photoresistance is a kind of typical photoconductive device.This resistance has photoconductive effect, and namely its composition material (or device) is after being subjected to optical radiation, and its conductivity (or resistance) can change.Photoresistance is compared with other semiconductor photoelectric device, and following advantage is arranged: 1. its spectral response range is quite wide; 2. working current is big, can reach several milliamperes; 3. the strong wide ranges of institute's photometry both can be surveyed high light, also can survey the low light level; 4. highly sensitive, gain of photoconductivity is greater than 1; 5. biased electrical is forced down, and nonpolarity branch is easy to use.
The photocurrent of photoresistance and the relation between the incident flux are called photoelectric characteristic.
The photoelectric characteristic of using photoresistance in the technical program is carried out input.Adopt photosensitive device to detect the luminous intensity of led light source, luminous intensity is the luminous intensity when detecting led light source and being in the high-high brightness gear herein, then light signal is converted to electric signal output, signal processing unit is handled the signal that detects, initial light intensity value when the largest light intensity that detects by photosensitive device and led light source dispatch from the factory carries out computing, draw the current light decay rate of led light source, when the light decay rate is in 50% when following, signal processing unit control warning device prompting led light source is scrapped.This technical scheme can apply on the various LED lightings, and is simple in structure, easy to use, guaranteed led light source safety, the reliable use.
Below in conjunction with accompanying drawing technical solution of the present invention is elaborated.
Referring to Fig. 1, the theory diagram of the device of scrapping for on-line monitoring led light source of the present invention.This device comprises detecting signal unit, signals collecting converting unit, signal processing unit, user interface and warning device.
Detecting signal unit is for detection of the luminous intensity of led light source and light signal is converted to electric signal exports to the signals collecting converting unit, adopt photoresistance to carry out the light intensity signal detection and light signal is converted to electric signal exporting in the present embodiment, described photoresistance is the photoresistance on the broad sense but not refers in particular to the device of certain model, utilizes the photocurrent of photoresistance and the relation of incident flux to carry out the photosignal conversion herein.
Processing is gathered, amplified to the signals collecting converting unit to the signal of detecting signal unit output, and the analog signal conversion after will handling is that digital signal is exported to signal processing unit; Collection conversion to signal is finished by corresponding function element or functional circuit, finish by collections/retainer, amplifying circuit, A/D converter as the electric signal of output the collection of electric signal is changed, described collection/retainer is according to certain sampling period TSWhen the input high level signal, electric signal is gathered, during the input low level signal, electric signal is kept, the signal of having sampled is converted to digital signal by A/D converter and outputs to signal processing unit through amplifying circuit amplification, simulating signal.
Signal processing unit carries out the current light decay rate that Treatment Analysis draws led light source to digital signal, when the light decay rate is in 50% when following, signal processing unit control warning device gives the alarm and points out led light source to scrap, simultaneously, signal processing unit also is used for presetting and storing the initial light intensity value of led light source; Described warning device comprises sound-producing device, display device or its combination, sound-producing device comprises hummer, display device comprises alarm lamp etc., and signal processing unit comprises MCU programmable logic controller (PLC) spare, includes but are not limited to single-chip microcomputer, ARM, CPLD, DSP, FPGA; The ratio of the initial light intensity value when described light decay rate refers to that the current largest light intensity value of led light source and led light source dispatch from the factory, this ratio is smaller or equal to 100%.When this ratio less than 50% the time, illustrate that this led light source has not met the safety lighting standard, this moment, warning device can give the alarm by hummer or alarm lamp etc., the led light source that the prompting led light source is scrapped and more renewed.
User interface, comprise keyboard, scrambler, button etc., can be used for the signal processing unit input control signal etc., want the standard of scrapping of led light source heightened or the initial value of led light source is reset etc. such as the user, can operate by corresponding user's action button.
This apparatus structure is simple, and is easy to use, can be applied on the various LED light fixtures.
Referring to Fig. 2, the method flow diagram of scrapping for on-line monitoring led light source of the present invention.The method that adopts the described device on-line monitoring of Fig. 1 led light source to scrap, whether the standard that this device on-line monitoring led light source is scrapped is to be in according to the current light decay rate of led light source to judge whether below 50% to scrap.This method comprises the steps:
S1: the largest light intensity value that online detection led light source is current also converts electric signal output to.
The ratio of the initial light intensity value when the light decay rate refers to that the current largest light intensity value of led light source and led light source dispatch from the factory, initial light intensity value just presets and stores for beginning, and before scrapping for this led light source, its initial value is constant.The present embodiment adopts the current largest light intensity value of the online detection led light source of photoresistance also to convert electric signal output to, according to the photoelectric characteristic of photoresistance detection signal is converted to photo-signal and exports to the signals collecting converting unit.
S2: the signals collecting converting unit is handled step S1 output signal.
Processing is sampled, amplified to the signals collecting converting unit to detection signal, and the analog signal conversion after will handling is that digital signal is exported to signal processing unit.Collection conversion to signal is finished by corresponding function element or functional circuit, detection signal is sampled according to the sampling period as sampling/retainer, during sampling/retainer input high level, electric signal is sampled, during sampling/retainer input low level, electric signal is kept, and the signal after the sampling is that digital signal outputs to signal processing unit through amplifying circuit amplification, A/D converter with analog signal conversion.
S3: the signal processing unit analysis draws the light decay rate of current led light source.
The initial light intensity of having stored according to the Signal and Signal Treatment unit of signals collecting change-over circuit output calculates the current light decay rate of led light source, and current light decay rate is judged.
S4: warning device gives the alarm and points out led light source to scrap.
Current light decay rate is in 50% when following, and the signal processing unit control warning device prompting led light source that gives the alarm is scrapped.Described alarm can be sent as hummer by sound-producing device, also can illustrate by display device such as alarm lamp, and perhaps both combinations give the alarm simultaneously.
In addition, this device also can carry out order control by user interface, carries out initial light intensity replacement etc. when new led light source detects as the standard of scrapping of change led light source or to being used for.The user can be combined into the line command operation by keyboard, scrambler, button or its to the control of this device.
Referring to Fig. 3, the detailed process process flow diagram of the method for scrapping for on-line monitoring led light source of the present invention.When light fixture dispatches from the factory, at first utilize MCU to the largest light intensity of the stylish led light source that dispatches from the factory by photoresistance, A the D Acquisition Circuit gather and carry out the data storage by MCU.When opening light fixture at every turn and adjusting to high-high brightness, MCU carries out the judgement of current light intensity intensity automatically then: the light intensity of judging current led light source is what times of the brand-new led light source largest light intensity of MCU storage.If current led light source light decay has arrived below 50% of brand-new led light source largest light intensity, judge that then the light intensity of current led light source is in the state of scrapping.Give the alarm simultaneously, the prompting personnel change led light source.Concrete steps are as follows:
When dispatching from the factory, presets by light fixture and stores largest light intensity:
(1) presets current gear led light source and be in the largest light intensity state, then execution in step (2);
(2) adjust current led light source to the high-high brightness gear, then execution in step (3);
(3) storage largest light intensity.
Each normal use when opening light fixture and adjusting to high-high brightness, MCU carries out current light intensity intensity determining step automatically:
(4) detect the current gear light intensity of led light source state, as not being largest light intensity, execution in step (5);
(5) call the brightness regulation subroutine and regulate brightness, execution in step (6) then;
(6) detect the led light source range state, as not being the high-high brightness shelves, return step (5), high-high brightness shelves in this way, execution in step (7);
(7) continuous 3 times largest light intensity is gathered, handle the light decay rate that draws current led light source, execution in step (8) then through MCU;
(8) the judgement led light source is scrapped state, as scraps, and then controls and returns step (4) after warning device sends 3 rhythmical audible alarms, as do not scrap, and directly returns step (4).
This device and method mainly is used on the LED lighting in the medical hoist tower suspension bridge project.
Beneficial effect: the present invention discloses the device and method that a kind of on-line monitoring led light source is scrapped, utilize photosensitive device that the luminous intensity of led light source is detected, whether scrap by the light decay rate on-line monitoring led light source of analyzing led light source, this scenario-frame is simple, easy to use, can be applied on the various LED light fixtures, but real-time online detects the light decay rate of led light source, avoided when the LED lighting because the damage that light decay continues when not reaching standard illuminants to use the eyesight to the people to cause, make guarantee for the lifting of the people's quality of life, also provide new function and new thinking for fields such as LED illuminations simultaneously.
Claims (10)
1. the device that the on-line monitoring led light source is scrapped is characterized in that, described device comprises:
Detecting signal unit detects the intensity of led light source and carries out the signal conversion;
The signals collecting converting unit is gathered and is carried out conversion process detection signal;
The LED light decay rate that draws is handled and analyzed automatically to signal processing unit to digital signal;
Warning device, the prompting led light source is scrapped;
Wherein, detecting signal unit with the analog signal transmission that detects to the signals collecting converting unit, the signals collecting converting unit gathers and converts to digital data transmission to signal processing unit to simulating signal, signal processing unit carries out Treatment Analysis to digital signal and draws LED light decay rate, and the control warning device gives the alarm when reaching rejection value.
2. the device scrapped of on-line monitoring led light source according to claim 1 is characterized in that described detecting signal unit comprises photoresistance, for detection of light intensity, and light signal is converted to electric signal output.
3. the device scrapped of on-line monitoring led light source according to claim 1, it is characterized in that, described signal processing unit comprises programmable logic controller (PLC) spare, and described programmable logic controller (PLC) spare includes but are not limited to single-chip microcomputer, ARM, CPLD, DSP, FPGA.
4. the device scrapped of on-line monitoring led light source according to claim 3 is characterized in that, the initial light intensity when described programmable logic controller (PLC) spare also is used for the storage led light source and dispatches from the factory.
5. the device scrapped of on-line monitoring led light source according to claim 1 is characterized in that described warning device comprises sound-producing device, display device or its combination, and wherein sound-producing device comprises hummer, and display device comprises alarm lamp.
6. the device scrapped of on-line monitoring led light source according to claim 1, it is characterized in that, described device also comprises user interface, is used for to programmable logic controller (PLC) spare input information, and described user interface comprises keyboard, scrambler, button or its combination.
7. a method that adopts the described device on-line monitoring of claim 1 led light source to scrap is characterized in that, comprises the steps:
S1: the largest light intensity value that online detection led light source is current also converts electric signal output to;
S2: the signals collecting converting unit is handled step S1 output signal;
S3: the signal processing unit analysis draws the light decay rate of current led light source;
S4: warning device gives the alarm and points out led light source to scrap.
8. the on-line monitoring led light source according to claim 7 method of scrapping is characterized in that, described method also comprises the initial light intensity when the step S5 before the step S1 presets and stores led light source and dispatches from the factory.
9. the on-line monitoring led light source according to claim 7 method of scrapping, it is characterized in that signal processing unit carries out the light decay rate that analyzing and processing draws led light source to the largest light intensity value and the initial light intensity among the step S5 that detect among the step S1 among the described step S3.
10. the on-line monitoring led light source according to claim 9 method of scrapping is characterized in that, warning device is scrapped the led light source prompting that is confirmed as the light decay rate and is in below 50%.
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