CN105792406A - Natural light intensity detection method and detection device capable of being placed in Led lamp - Google Patents
Natural light intensity detection method and detection device capable of being placed in Led lamp Download PDFInfo
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- CN105792406A CN105792406A CN201510699998.3A CN201510699998A CN105792406A CN 105792406 A CN105792406 A CN 105792406A CN 201510699998 A CN201510699998 A CN 201510699998A CN 105792406 A CN105792406 A CN 105792406A
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- sampling
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- 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]
- H05B45/10—Controlling the intensity of the light
Abstract
The invention discloses a natural light intensity detection method capable of being placed in a Led lamp. The natural light intensity detection method is characterized in that a temporary light off time slot which is difficult to observe by people exists in the Led lamp by controlling the Led lamp, a light intensity sampling module is used for detecting the natural light intensity of an environment where the LED lamp is located according to the light off time slot, and the environmental natural light intensity of the Led lamp is obtained after a sampled parameter of the light intensity at the moment is processed. The invention also discloses a natural light intensity detection device capable of being placed in the Led lamp. The LED light off time slot which is difficult to observe by people exists in the LED lighting lamp controlled by a pulse width modulation (PWM) method, the natural light intensity is detected, the luminous influence of the LED lamp is avoided, and the accuracy of natural light intensity detection is improved; and an existing hardware device can be directly utilized, the device and the lamp can be integratedly designed by upgrading software, and meanwhile, the lamp brightness is accurately controlled according to environmental brightness.
Description
Technical field
The present invention relates to Led lighting field, particularly to a kind of natural light light-intensity test method being placed in Led light fixture and detecting device.
Background technology
Along with the high-volume of intelligent lighting is promoted the use of, existing technology realize according to the threshold values control of light in already with very general.Increasing consumer intentionally gets a kind of better product, and when ambient reaches to a certain degree, light fixture can turn itself off, and during lower than setting value, oneself is opened, and can change self luminous intensity according to extraneous light intensity oneself, it is provided that on-demand illumination.It is built in the light intensity sensor in light fixture when in use except receiving the light of extraneous lamp, also receive artificial light or other artificial light of periphery that light fixture itself sends, therefore can not detect the intensity of surrounding enviroment nature light effectively accurately, therefore also just cannot really realize the intensity according to natural light and realize automatically controlling the brightness of light fixture；For this problem and actual demand, the method that the luminous source of a lot of producers employing own and sensor are provided separately, such as the scheme that light-sensitive device is drawn by lead-in wire, allow light-sensitive device away from luminous source own, the actual effect only gathering nature light, but this scheme difficult wiring in actual use, affect outward appearance, it is difficult to high-volume promote, and cost is high.
Summary of the invention
For disadvantages described above, present invention aim at how realizing being built in light fixture and do not realized by the interference of the artificial light in light fixture the intensity of accurate detection nature light particularly wherein visible ray.
To achieve these goals, the invention provides a kind of natural light light-intensity test method being placed in Led light fixture, it is characterized in that: by controlling Led lamp, Led lamp is allowed to there is the time slot of turning off the light that of short duration human eye is subtle, luminosity sampling module utilizes time slot of turning off the light to detect the intensity of now naturally light residing for LED lamp, and the parameter of this moment luminosity sampling obtains LED lamp naturally light light intensity after treatment.
The described natural light light-intensity test method being placed in Led light fixture, it is characterized in that: control the brightness of Led lamp by regulating the dutycycle of pwm signal, the largest duty cycle of pwm signal is less than 1, when load end PWM duty cycle is maximum, correspondence Led is the brightest, the low level time of load end pwm signal is the time slot TmieS that turns off the light, and controls luminosity sampling module and carries out luminosity sampling at described time slot of turning off the light.
The described natural light light-intensity test method being placed in Led light fixture, it is characterized in that: power instantaneous interruption by controlling Led lamp, Led lamp is allowed to there is the time slot of turning off the light of moment, this time slot of turning off the light produces for outside adjustment or internal regulation, triggered by adjustment action, utilize and trigger and control the time slot of turning off the light formed, control luminosity sampling module and carry out luminosity sampling at described time slot of turning off the light.
The described natural light light-intensity test method being placed in Led light fixture, it is characterised in that the duty cycle range of pwm signal is 0-99%.
The described natural light light-intensity test method being placed in Led light fixture, time slot turn off the light described in it is characterized in that more than TyuS+ sunset glow time, TcaiS sampling time, controls luminosity sampling module and carry out luminosity sampling after sunset glow time TmieS-, TyuS time of each time slot of turning off the light.
The described natural light light-intensity test method being placed in Led light fixture, it is characterized in that presetting continuous sampling m data in the unit interval, described m data is sampled continuous m the TyuS+Tm of time slot that turns off the light, TyuS+2*Tm ..., TyuS+m*Tm moment respectively, TyuS+m*Tm+TcaiS < TmieS, carries out minima, arithmetic average or weighted mean and calculates the natural light light intensity obtaining current time the m data of continuous sampling.
nullA kind of natural light light intensity test device being placed in Led light fixture，Including LED drive module、LED load、Natural light intensity detection module、Natural light intensity signal amplifies、A/D luminosity sampling、Sampled signal processes、Pwm signal produces and performs module，Pwm signal generation module output pwm signal，It is characterized in that central controller exports, by controlling to perform the dutycycle of module pwm signal, the brightness controlling LED load，The largest duty cycle of pwm signal is less than 1，When LED load end PWM duty cycle is maximum, correspondence LED load is the brightest，Control LED load lamp when LED load end pwm signal is low level to go out state，Low level time in PWM each output cycle is the time slot TmieS that turns off the light，Central controller controls A/D sampling module carries out luminosity sampling at time slot of turning off the light.
The described natural light light intensity test device being placed in Led light fixture, it is characterised in that the duty cycle range of pwm signal is 0-99%.
The described natural light light intensity test device being placed in Led light fixture, time slot turn off the light described in it is characterized in that more than TyuS+ sunset glow time, TcaiS sampling time, and central processing unit controls luminosity sampling module and carries out luminosity sampling after each time slot TmieS-sunset glow time TyuS that turns off the light.
The described natural light light intensity test device being placed in Led light fixture, it is characterized in that presetting continuous sampling m data in the sampling time, described m data is sampled continuous m the Tyu+Tm of time slot that turns off the light, Tyu+2*Tm ..., Tyu+m*Tm moment respectively, Tyu+m*Tm+TcaiS < TmieS, carries out minima, arithmetic average or weighted mean and calculates the natural light light intensity obtaining current time the m data of continuous sampling.
The described natural light light intensity test device being placed in Led light fixture, it is characterized in that the data of the natural light light intensity according to detection and previous data compare, it is achieved LED lamp realizes switch lamp or the operation of light fixture light changing function according to the power of natural light outside.
The present invention, by utilizing people in the LED illumination lamp of PWM Control Cooling to there is the imperceptible LED of the eye time slot turned off the light, carries out the detection of nature light light intensity, avoids the impact of LED lamp self luminescence, improve the accuracy of Natural light intensity detection；Existing hardware equipment can be directly utilized, only by software upgrading, and can realize and light fixture integrated design, realize according to ambient brightness being precisely controlled lamp brightness simultaneously.
Accompanying drawing explanation
Fig. 1 is moment LED power failure oscillogram；
Fig. 2 is pwm signal figure；
Fig. 3 is the natural light light intensity test device system block diagram being placed in Led light fixture.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Fig. 1 is moment LED power failure oscillogram, Fig. 2 is pwm signal figure, utilize the reactionlessness of human eye, when flicker frequency is more than or equal to 50H, human eye just cannot perception its flicker, utilize this technical characterstic to be regulated the brightness of light fixture in Led light fixture by the dutycycle of regulating load end pwm signal.It is under positive light-modulating mode at PWM, controls Led lamp when load end pwm signal is high level bright, control Led lamp during for low level and go out, if low level time is the time slot Tmie that turns off the light；At PWM for, under negative light-modulating mode, controlling Led lamp when load end pwm signal is low level bright, control Led lamp during for high level and go out, if high level is for turning off the light time slot Tmie,.Although human eye sensation Led lamp is always stable bright, but reality in each PWM cycle TmieS during this period of time in Led lamp go out, the present invention utilizes this time slot of turning off the light especially, central controller controls luminosity sampling module carries out the sampling of extraneous light intensity at the time slot of turning off the light that this Led lamp goes out, this instance sample to light intensity be exactly the natural light light intensity got rid of the interference of the artificial light that Led light fixture sends self and collect.
Due to Led lamp encapsulation time inside scribble fluorescent material, Led lamp from bright be changed into go out time due to the aura effect of fluorescent material, need through one section persistence Tyu, Led lamp just can be in state of going out completely, in order to overcome this problem, need to control luminosity sampling module after lamp goes out again time delay at least through Tyu sample again, this instance sample to light intensity be exactly the interference of the twilight sunset getting rid of artificial light that Led light fixture self sends and fluorescent material and the natural light light intensity that collects.
In order to improve the accuracy of detection further, overcoming single to adopt and there is definitiveness scarcely, adopt continuous sampling m data within the default sampling time, the data obtained after this m data is carried out data process are as the last Natural light intensity degree of current slot.Control luminosity sampling module to sample continuous m the Tyu+Tm of time slot that turns off the light, Tyu+2*Tm ..., Tyu+m*Tm moment respectively, Tyu+m*Tm+TcaiS < TmieS, carries out minima, arithmetic average or weighted mean and calculates the natural light light intensity obtaining current time the m data of continuous sampling.
Central processing unit compares with the data of last time according to the natural data of light light intensity of detection, if compares in span of control at window, realizes LED lamp and realize switch lamp or light fixture self adaptation modulation light feature operation according to the power of natural light outside.
Fig. 3 is the natural light light intensity test device system block diagram being placed in Led light fixture, including LED drive module 1, LED load 2, Natural light intensity detection module 3, Natural light intensity amplification module 4, arrange interface 5, central processing unit 6, perform module 7 form.Wherein LED drive module 1 includes main power source module, auxiliary power module；Central processing unit 6 includes A/D luminosity sampling, sampled signal processes, pwm signal generation module.Wherein the auxiliary power module in LED drive module 1 provides Natural light intensity detection module 3, Natural light intensity amplification module 4, arranges the power supply required for interface 5, central processing unit 6, execution module 7, and the main power source module in LED drive module 1 provides the power supply needed for LED load 2.nullNatural light intensity detection module 3 is monitored the change of ambient by optical transmission window，Detect that the variable signal of ambient delivers to Natural light intensity amplification module 4，The A/D luminosity sampling module delivering to central processing unit 6 by signal after being amplified carries out A/D conversion light intensity signal of sampling，The extraneous light intensity signal of sampling is sent into the sampled signal processing module of central processing unit 6 and is processed，Sampled signal processing module compares according to the previous light intensity signal of internal reservoir and the light intensity signal of this sampling，Analyse whether to exceed the window fiducial value preset，In analysis, this light intensity signal is equal with previous light intensity signal and without departing from default window fiducial value，Then abandon this secondary data，Return and continue the extraneous light intensity of monitoring，In analysis, this light intensity signal and previous light intensity signal are unequal and without departing from default window fiducial value，Then abandon this secondary data，Return and continue the extraneous light intensity of monitoring，In analysis, this light intensity signal and previous light intensity signal are unequal and beyond the window fiducial value preset，Sampled signal processing module calls the user setup data arranging interface 5，The pwm signal generation module in central processing unit 6 is controlled according to user setup data output pwm signal according to user setup data，Controlled to perform module 7 by pwm signal to be operated，Perform the brightness that module 7 controls LED load 2 by controlling the dutycycle of pwm signal to export，The largest duty cycle of pwm signal is less than 1，During the largest duty cycle of pwm signal, correspondence LED load 2 is the brightest，Control LED load 2 lamp when pwm signal is low level to go out state，Low level time in PWM each output cycle is the time slot TmieS that turns off the light，Central controller controls A/D sampling module carries out luminosity sampling at time slot of turning off the light.In order to ensure that each time slot Tmie that turns off the light has enough sampling times, positive dimming mode is adopted during design, the largest duty cycle of pwm signal is 99%, optimum is at 90-92%, when dutycycle is 99%, LED load 2 is the brightest, when dutycycle is 0, LED load 2 is state of entirely going out, mutually linear corresponding in change procedure.
Central controller 6, by controlling the light intensity of the natural light that internal A/D luminosity sampling module detects at time slot of turning off the light, dynamically adjusts the dutycycle of the PWM performing module 7 output, it is achieved adjust LED load brightness.Detect when Natural light intensity degree is bigger, reduce the dutycycle of pwm signal, reduce the brightness of output LED load light fixture；When detecting that Natural light intensity degree diminishes, improve the dutycycle of pwm signal, improve the brightness of output LED load light fixture, when detecting that Natural light intensity degree become greater to more than when arranging the user preset data at interface 5, turn off the output of LED load, when turning off, when detecting that Natural light intensity degree is varied down to less than when arranging the user preset data at interface 5, open the output of LED load, reach the effect of the light modulation of LED lamp self adaptation and switch.
In order to improve the accuracy of detection further, unitary sampling is overcome to there is definitiveness scarcely, prevent the misoperation that the sudden change of ambient transience causes, adopt the mode presetting the sampling time, generally arrange the sampling time 3 seconds and more than, the best time is the 5-10 second, sample in the time slot of turning off the light of each pwm signal a secondary data, after the default sampling time arrives, assuming to sample m data, the data that in central processing unit 6, sampled signal processing module obtains after this m data is carried out data process are as the light intensity of the last natural light of current slot.In order to increase accuracy, central controller 6 is sampled continuous m the Tyu+Tm of time slot that turns off the light, Tyu+2*Tm ..., Tyu+m*Tm moment respectively by controlling internal A/D luminosity sampling module, Tyu+m*Tm+TcaiS < TmieS, carries out minima, arithmetic average or weighted mean and calculates the Natural light intensity degree obtaining current time the m data of continuous sampling.
Above disclosed it is only an embodiment of the present invention, certainly the interest field of basis can not be limited with this, one of ordinary skill in the art will appreciate that all or part of flow process realizing above-described embodiment, and according to the equivalent variations that the claims in the present invention are made, still fall within the scope that the present invention contains.
Claims (11)
1. the natural light light-intensity test method being placed in Led light fixture, it is characterized in that: by controlling Led lamp, Led lamp is allowed to there is the time slot of turning off the light that of short duration human eye is subtle, luminosity sampling module utilizes time slot of turning off the light to detect the intensity of now naturally light residing for LED lamp, and the parameter of this moment luminosity sampling obtains LED lamp naturally light light intensity after treatment.
2. the natural light light-intensity test method being placed in Led light fixture according to claim 1, it is characterized in that: control the brightness of Led lamp by regulating the dutycycle of pwm signal, the largest duty cycle of pwm signal is less than 1, when load end PWM duty cycle is maximum, correspondence Led lamp is the brightest, the low level time of load end pwm signal is the time slot TmieS that turns off the light, and controls luminosity sampling module and carries out luminosity sampling at described time slot of turning off the light.
3. the natural light light-intensity test method being placed in Led light fixture according to claim 1, it is characterized in that: power instantaneous interruption by controlling Led lamp, Led lamp is allowed to there is the time slot of turning off the light of moment, this time slot of turning off the light produces for outside adjustment or internal regulation, triggered by adjustment action, utilize and trigger and control the time slot of turning off the light formed, control luminosity sampling module and carry out luminosity sampling at described time slot of turning off the light.
4. the natural light light-intensity test method being placed in Led light fixture according to claim 2, it is characterised in that the duty cycle range of pwm signal is 0-99%.
5. the natural light light-intensity test method being placed in Led light fixture according to claim 3 or 4, time slot turn off the light described in it is characterized in that more than TyuS+ sunset glow time, TcaiS sampling time, controls luminosity sampling module and carry out luminosity sampling after sunset glow time TmieS-, TyuS time of each time slot of turning off the light.
6. the natural light light-intensity test method being placed in Led light fixture according to claim 4, it is characterized in that presetting continuous sampling m data in the unit interval, described m data is sampled continuous m the TyuS+Tm of time slot that turns off the light, TyuS+2*Tm ..., TyuS+m*Tm moment respectively, TyuS+m*Tm+TcaiS < TmieS, carries out minima, arithmetic average or weighted mean and calculates the natural light light intensity obtaining current time the m data of continuous sampling.
null7. the natural light light intensity test device being placed in Led light fixture，Including LED drive module、LED load、Natural light intensity detection module、Natural light intensity signal amplifies、A/D luminosity sampling、Sampled signal processes、Pwm signal produces and performs module，Pwm signal generation module output pwm signal，It is characterized in that central controller exports, by controlling to perform the dutycycle of module pwm signal, the brightness controlling LED load，The largest duty cycle of pwm signal is less than 1，When LED load end PWM duty cycle is maximum, correspondence LED load is the brightest，Control LED load lamp when LED load end pwm signal is low level to go out state，Low level time in PWM each output cycle is the time slot TmieS that turns off the light，Central controller controls A/D sampling module carries out luminosity sampling at time slot of turning off the light.
8. the natural light light intensity test device being placed in Led light fixture according to claim 7, it is characterised in that the duty cycle range of pwm signal is 0-99%.
9. the natural light light intensity test device being placed in Led light fixture according to claim 8, time slot turn off the light described in it is characterized in that more than TyuS+ sunset glow time, TcaiS sampling time, and central processing unit controls luminosity sampling module and carries out luminosity sampling after each time slot TmieS-sunset glow time TyuS that turns off the light.
10. the natural light light intensity test device being placed in Led light fixture according to claim 9, it is characterized in that presetting continuous sampling m data in the sampling time, described m data is sampled continuous m the Tyu+Tm of time slot that turns off the light, Tyu+2*Tm ..., Tyu+m*Tm moment respectively, Tyu+m*Tm+TcaiS < TmieS, carries out minima, arithmetic average or weighted mean and calculates the natural light light intensity obtaining current time the m data of continuous sampling.
11. the natural light light intensity test device being placed in Led light fixture according to claim 10, it is characterized in that the data of the natural light light intensity according to detection and previous data compare, it is achieved LED lamp realizes switch lamp or the automatic modulation light feature operation of light fixture according to the power of natural light outside.
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|---|---|---|---|
| CN201510699998.3A CN105792406A (en) | 2015-10-23 | 2015-10-23 | Natural light intensity detection method and detection device capable of being placed in Led lamp |
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| CN201510699998.3A CN105792406A (en) | 2015-10-23 | 2015-10-23 | Natural light intensity detection method and detection device capable of being placed in Led lamp |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201277444Y (en) * | 2008-08-08 | 2009-07-22 | 陕西恒鑫精密纺织机械有限公司 | Digital light-modulation high-power LED electric torch |
| US20120262071A1 (en) * | 2011-02-14 | 2012-10-18 | Arkalumen Inc. | Lighting apparatus and method for detecting reflected light from local objects |
| CN104837285A (en) * | 2015-06-01 | 2015-08-12 | 北京岩与科技有限公司 | Method and remote control terminal for realizing wireless fine illumination control |
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2015
- 2015-10-23 CN CN201510699998.3A patent/CN105792406A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201277444Y (en) * | 2008-08-08 | 2009-07-22 | 陕西恒鑫精密纺织机械有限公司 | Digital light-modulation high-power LED electric torch |
| US20120262071A1 (en) * | 2011-02-14 | 2012-10-18 | Arkalumen Inc. | Lighting apparatus and method for detecting reflected light from local objects |
| CN104837285A (en) * | 2015-06-01 | 2015-08-12 | 北京岩与科技有限公司 | Method and remote control terminal for realizing wireless fine illumination control |
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Address after: 2, 3, 3 building, 380 Xiangshan Avenue, Luotian community, Songgang street, Shenzhen, Guangdong, Baoan District 518105, China Applicant after: SHENZHEN MERRY INTELLIGENT TECHNOLOGY CO., LTD. Address before: 518103, A building, Baoan District District, Fenghuang industrial first industrial zone, Fenghuang street, Fuyong, Guangdong, Shenzhen, Fourth Applicant before: SHENZHEN MERRY INTELLIGENT TECHNOLOGY CO., LTD. |
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