CN103118469A - Method and device for controlling LED streetlamp - Google Patents

Method and device for controlling LED streetlamp Download PDF

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Publication number
CN103118469A
CN103118469A CN2013100537430A CN201310053743A CN103118469A CN 103118469 A CN103118469 A CN 103118469A CN 2013100537430 A CN2013100537430 A CN 2013100537430A CN 201310053743 A CN201310053743 A CN 201310053743A CN 103118469 A CN103118469 A CN 103118469A
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China
Prior art keywords
analog
digital conversion
initialization
led
voltage signal
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CN2013100537430A
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CN103118469B (en
Inventor
傅强
葛武
张国峥
陆东阳
陈勇
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WISTECH ENERGY-SAVING TECHNOLOGY Co.,Ltd.
Comprehensive Energy of China Southern Power Grid Co Ltd
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SNRISE Corp
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10Controlling the light source
    • H05B47/175Controlling the light source by remote control

Abstract

An embodiment of the invention provides a method and a device for controlling an LED streetlamp. The streetlamp is remotely controlled in a communication-free manner by using a high-voltage direct-current power supply for driving the streetlamp as a signal source, the service life of the device can be greatly prolonged, and reliability of the device can be greatly improved. The method includes the steps: initializing a single chip microcomputer; loading a preset gear limit reference value; initializing an analog-digital conversion module and a PWM (pulse width modulation) module; starting analog-digital conversion for voltage signals; reading analog-digital conversion results after completing analog-digital conversion for the voltage signals and comparing the analog-digital conversion results with the gear limit reference value to obtain comparison results; and refreshing a duty ratio according to the comparison results.

Description

A kind of LED method for controlling street lamps and device
Technical field
The embodiment of the present invention relates to the road lighting field, is specifically related to a kind of LED method for controlling street lamps and device.
Background technology
Street lamp is the important component part of city illumination, and traditional street lamp often adopts high-pressure sodium lamp, and high-pressure sodium lamp 360 degree are luminous, and the shortcoming that its light loss is large has caused the huge waste of the energy.Compare with conventional road lamp, the LED street lamp not only has long characteristics of good, non-maintaining and life-span of colourity, and crucial be that it is more energy-conservation than conventional road lamp, in today of energy supply contradiction, this point becomes and is even more important.
Existing LED street lamp control mode mainly contains two kinds, a kind of is the mode that adopts single lamp to control, that is each LED controller for road lamp is only controlled a LED street lamp, need in the time of work one by one the LED street lamp to be controlled, but in the situation that LED street lamp number is huge, control testing to the LED street lamp will become loaded down with trivial details and mistake easily occur, also can expend simultaneously a large amount of manpower and materials, causes serious waste.
Another is by the mode that radio communication is controlled, single led street lamp or whole LED street lamp group to be controlled, this method is compared first method and can convenient and directly be controlled whole LED road lamp system, but because this method need to install wireless communication module additional in the LED road lamp system, can make the LED road lamp system become huger, and this control method relative complex and reliability not high.
Summary of the invention
The embodiment of the present invention provides a kind of LED method for controlling street lamps and device, the high-voltage DC power supply that drives street lamp by utilization realizes without communication Long-distance Control street lamp as the mode of signal source, simultaneously useful life of extension fixture and improve its reliability greatly.
LED method for controlling street lamps in the embodiment of the present invention comprises:
Single-chip microcomputer is carried out initialization;
Load each default gear limit fiducial value;
Initialization analog-to-digital conversion module and PWM module;
The analog-to-digital conversion of unlatching to voltage signal;
When the analog-to-digital conversion of voltage signal is completed, read the analog-to-digital conversion result, and described analog-to-digital conversion result is compared with described each gear limit fiducial value, obtain comparative result;
Refresh duty ratio according to described comparative result.
Alternatively, after refreshing duty ratio according to described comparative result, step also comprises:
Open next time the analog-to-digital conversion to voltage signal.
Alternatively, describedly single-chip microcomputer carried out initialization comprise:
Register in single-chip microcomputer, timer and input/output port are carried out initialization.
LED roam lamp control device in the embodiment of the present invention comprises:
The first initialization unit is used for single-chip microcomputer is carried out initialization;
Load units is used for loading each default gear limit fiducial value;
The second initialization unit is used for initialization analog-to-digital conversion module and PWM module;
Converting unit is used for opening the analog-to-digital conversion to voltage signal;
Obtain the unit, be used for reading the analog-to-digital conversion result, and described analog-to-digital conversion result being compared with described each gear limit fiducial value when the analog-to-digital conversion of voltage signal is completed, obtain comparative result;
Refresh unit is used for refreshing duty ratio according to described comparative result.
Alternatively, described acquisition unit comprises and reads subelement and subelement relatively;
The described subelement that reads is used for reading the analog-to-digital conversion result when the analog-to-digital conversion of voltage signal is completed;
Described relatively subelement is used for described analog-to-digital conversion result is compared with described each gear limit fiducial value, obtains comparative result.
In the embodiment of the present invention, at first single-chip microcomputer is carried out initialization, then load each default gear limit fiducial value, then initialization analog-to-digital conversion module and PWM module, then open analog-to-digital conversion, when analog-to-digital conversion is completed, read the analog-to-digital conversion result, and described analog-to-digital conversion result is compared with described each gear limit fiducial value, obtain comparative result, at last refresh duty ratio according to described comparative result and can complete regulating and controlling to the LED street lamp.Because LED method for controlling street lamps of the present invention directly utilizes the high-voltage DC power supply that drives street lamp as signal source, thereby greatly simplified the single-lamp controller structure, and can control easily and directly the LED road lamp system, simultaneously owing to adopting high voltage direct current as its power supply, driver has realized going power supply, and need not electrochemical capacitor, thereby can guarantee to greatest extent equipment long-life, improve its reliability.
Description of drawings
Fig. 1 is LED method for controlling street lamps the first embodiment flow chart in the embodiment of the present invention;
Fig. 2 is LED method for controlling street lamps the second embodiment flow chart in the embodiment of the present invention;
Fig. 3 is LED roam lamp control device example structure figure in the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of LED method for controlling street lamps and device, the high-voltage DC power supply that drives street lamp by utilization realizes without communication Long-distance Control street lamp as the mode of signal source, simultaneously useful life of extension fixture and improve its reliability greatly.
See also Fig. 1, in the embodiment of the present invention, the first embodiment of LED method for controlling street lamps comprises:
101, single-chip microcomputer is carried out initialization;
Before the LED street lamp is controlled, can carry out initialization operation to single-chip microcomputer, above-mentioned single-chip microcomputer is carried out initialization operation can be for the register in single-chip microcomputer, timer and input/output port be carried out initialization.Need to prove, to what the initialization operation of single-chip microcomputer was not limited to foregoing description, the register in single-chip microcomputer, timer and input/output port are carried out initialization, can also comprise the initialization operation that other linkage function need to be carried out, do not do herein restriction.
102, load each default gear limit fiducial value;
After single-chip microcomputer is carried out initialization operation, can load each gear limit fiducial value, each above-mentioned gear limit fiducial value can carry out setting before initialization operation to single-chip microcomputer, and above-mentioned setting can be set according to the specification of high-voltage DC power supply and LED street lamp.
103, initialization analog-to-digital conversion module and PWM module;
After loading each gear limit fiducial value, can initialization analog-to-digital conversion module and PWM module.
104, the analog-to-digital conversion of unlatching to voltage signal;
After completing the initialization to analog-to-digital conversion module and PWM module, can open the analog-to-digital conversion to voltage signal, above-mentioned unlatching is in order to obtain the level information of voltage signal to the analog-to-digital conversion of voltage signal.
105, when the analog-to-digital conversion of voltage signal is completed, read the analog-to-digital conversion result, and the analog-to-digital conversion result is compared with each gear limit fiducial value, obtain comparative result;
Complete the analog-to-digital conversion of voltage signal is completed after, can obtain the analog-to-digital conversion result, the analog-to-digital conversion result is compared with each gear limit fiducial value, can obtain comparative result, what above-mentioned comparative result characterized is the residing gear of voltage signal level value.
106, refresh duty ratio according to comparative result.
Complete the analog-to-digital conversion result and compare with each gear limit fiducial value, after obtaining comparative result, can refresh duty ratio according to comparative result, above-mentionedly refresh the operation that duty ratio can realize regulating the aspects such as the brightness of LED street lamp or switch.
In the embodiment of the present invention, at first single-chip microcomputer is carried out initialization, then load each default gear limit fiducial value, then initialization analog-to-digital conversion module and PWM module, then open analog-to-digital conversion, when analog-to-digital conversion is completed, read the analog-to-digital conversion result, and the analog-to-digital conversion result is compared with each gear limit fiducial value, obtain comparative result, at last refresh duty ratio according to comparative result and can complete regulating and controlling to the LED street lamp.Because LED method for controlling street lamps of the present invention directly utilizes the high-voltage DC power supply that drives street lamp as signal source, thereby greatly simplified the single-lamp controller structure, and can control easily and directly the LED road lamp system, simultaneously owing to adopting high voltage direct current as its power supply, driver has realized going power supply, and need not electrochemical capacitor, thereby can guarantee to greatest extent equipment long-life, improve its reliability.
The above has simply introduced the first embodiment of LED method for controlling street lamps in the embodiment of the present invention, the below is described in detail the second embodiment of LED method for controlling street lamps of the present invention, see also Fig. 2, in the embodiment of the present invention, the second embodiment of LED method for controlling street lamps comprises:
201, single-chip microcomputer is carried out initialization;
Before the LED street lamp is controlled, can carry out initialization operation to single-chip microcomputer, above-mentioned single-chip microcomputer is carried out initialization operation can be for the register in single-chip microcomputer, timer and input/output port be carried out initialization.Need to prove, to what the initialization operation of single-chip microcomputer was not limited to foregoing description, the register in single-chip microcomputer, timer and input/output port are carried out initialization, can also comprise the initialization operation that other linkage function need to be carried out, do not do herein restriction.
202, load each default gear limit fiducial value;
After single-chip microcomputer is carried out initialization operation, can load each gear limit fiducial value, each above-mentioned gear limit fiducial value can carry out setting before initialization operation to single-chip microcomputer, and above-mentioned setting can be set according to the specification of high-voltage DC power supply and LED street lamp.
The below illustrates the setting of each gear limit fiducial value with an object lesson, suppose that LED street lamp single-lamp high voltage direct current constant-flow driver accepts the 220-300VDC dc powered, the rated operational voltage of LED street lamp is 220VDC, the threshold value of turning off the light that can set the LED street lamp is 200VDC, when input dc power is that 200VDC closes the LED street lamp when following.Limit fiducial value can be divided into 2,3,4 or 5 grades, concrete gear number of dividing is not limited to above-mentioned 2,3,4 or 5 grades, can set according to actual demand, suppose limit fiducial value is divided into 4 grades, that is 220-240VDC, 240-260VDC, 260-280VDC and 280-300VDC, each gear limit fiducial value can corresponding current value, above-mentioned electric current is provided by constant-current source, when the dc voltage value that detects dropped in the scope of a certain gear, can regulate the constant-current source electric current was current value corresponding to this gear.
Line drop can be to dimming control signal, that is the impact that causes of voltage signal, the method that can adopt the method for calculating every grade of minimum voltage to divide light modulation shelves level reduces this impact, concrete adopt method that the method for calculating every grade of minimum voltage divides light modulation shelves level can for: when end street lamp electric current when maximum, be assumed to be 1A, measure its minimum voltage, be assumed to be 260VDC, end shelves regulated voltage signal scope is decided to be 260-300VDC, electric current is all by the 1A constant current output, by that analogy in this scope.When the single lamp high voltage direct current of initialization driver, with each grade voltage level division information write-enable device, by regulating the voltage of dc power supply, just can realize the stepping adjusting by programming device.
203, initialization analog-to-digital conversion module and PWM module;
After loading each gear limit fiducial value, can initialization analog-to-digital conversion module and PWM module.
204, the analog-to-digital conversion of unlatching to voltage signal;
Complete after analog-to-digital conversion module and PWM module, can open the analog-to-digital conversion to voltage signal, above-mentioned unlatching is in order to obtain the level information of voltage signal to the analog-to-digital conversion of voltage signal.Above-mentioned analog-to-digital conversion to voltage signal can condition trigger startup, also can be in starting state in the whole process that the LED street lamp uses always.
205, when the analog-to-digital conversion of voltage signal is completed, execution in step 206, otherwise execution in step 205;
When the analog-to-digital conversion of voltage signal is completed, can execution in step 206, otherwise continue execution in step 205.
206, read the analog-to-digital conversion result, and the analog-to-digital conversion result is compared with each gear limit fiducial value, obtain comparative result;
Complete the analog-to-digital conversion of voltage signal is completed after, can obtain the analog-to-digital conversion result, the analog-to-digital conversion result is compared with each gear limit fiducial value, can obtain comparative result, what above-mentioned comparative result characterized is the residing gear of voltage signal level value.
For example each gear limit fiducial value is 220-240VDC, 240-260VDC, 260-280VDC and the 280-300VDC in step 202, the current value that 240-260VDC place gear is corresponding is 0.8A, after the analog-to-digital conversion of voltage signal is completed, obtaining the analog-to-digital conversion result is 255VDC, can know that this moment, voltage signal was in the gear of 240-260VDC.
207, refresh duty ratio according to comparative result;
Complete the analog-to-digital conversion result and compare with each gear limit fiducial value, after obtaining comparative result, can refresh duty ratio according to comparative result, above-mentionedly refresh the operation that duty ratio can realize regulating the aspects such as the brightness of LED street lamp or switch.
Example in the step 206 can be adjusted to 0.8A with the current value of constant-current source by refreshing duty ratio as example, can realize adjusting the LED road lamp system according to comparative result by above-mentioned method.
208, open next time analog-to-digital conversion to voltage signal.
After refreshing duty ratio according to comparative result, can open next time the analog-to-digital conversion of voltage signal, can realize like this real-time monitoring to the LED road lamp system.
in the embodiment of the present invention, at first single-chip microcomputer is carried out initialization, then load each default gear limit fiducial value, follow initialization analog-to-digital conversion module and PWM module, then open analog-to-digital conversion, when analog-to-digital conversion is completed, read the analog-to-digital conversion result, and the analog-to-digital conversion result is compared with each gear limit fiducial value, obtain comparative result, at last refresh duty ratio according to comparative result and can complete regulating and controlling to the LED street lamp, after completing above-mentioned adjusting to the LED street lamp, can open next time analog-to-digital conversion to voltage signal to realize the real-time monitoring to the LED road lamp system.Because LED method for controlling street lamps of the present invention directly utilizes the high-voltage DC power supply that drives street lamp as signal source, thereby greatly simplified the single-lamp controller structure, and can control easily and directly the LED road lamp system, simultaneously owing to adopting high voltage direct current as its power supply, driver has realized going power supply, and need not electrochemical capacitor, thereby can guarantee to greatest extent equipment long-life, improve its reliability.
The above is described in detail the second embodiment of LED method for controlling street lamps of the present invention, the setting up procedure of each gear limit fiducial value particularly, the below introduces LED roam lamp control device embodiment of the present invention, sees also Fig. 3, and in the embodiment of the present invention, LED roam lamp control device embodiment comprises:
The first initialization unit 301 is used for single-chip microcomputer is carried out initialization;
Load units 302 is used for loading each default gear limit fiducial value;
The second initialization unit 303 is used for initialization analog-to-digital conversion module and PWM module;
Converting unit 304 is used for opening the analog-to-digital conversion to voltage signal;
Obtain unit 305, be used for reading the analog-to-digital conversion result, and described analog-to-digital conversion result being compared with described each gear limit fiducial value when the analog-to-digital conversion of voltage signal is completed, obtain comparative result;
Refresh unit 306 is used for refreshing duty ratio according to described comparative result.
Described acquisition unit 305 comprises judgment sub-unit 3051, reads subelement 3052 and compares subelement 3053;
Described judgment sub-unit 3051 is used for judgement whether the analog-to-digital conversion of voltage signal is completed;
The described subelement 3052 that reads is used for reading the analog-to-digital conversion result when the analog-to-digital conversion of voltage signal is completed;
Described relatively subelement 3053 is used for described analog-to-digital conversion result is compared with described each gear limit fiducial value, obtains comparative result.
Before the LED street lamp is controlled, the first initialization unit 301 can be carried out initialization operation to single-chip microcomputer, and 301 pairs of single-chip microcomputers of above-mentioned the first initialization unit carry out initialization operation can be for carrying out initialization to the register in single-chip microcomputer, timer and input/output port.Need to prove, to what the initialization operation of single-chip microcomputer was not limited to foregoing description, the register in single-chip microcomputer, timer and input/output port are carried out initialization, can also comprise the initialization operation that other linkage function need to be carried out, do not do herein restriction.
After 301 pairs of single-chip microcomputers of the first initialization unit carry out initialization operation, load units 302 can load each gear limit fiducial value, each above-mentioned gear limit fiducial value can carry out setting before initialization operation to single-chip microcomputer, and above-mentioned setting can be set according to the specification of high-voltage DC power supply and LED street lamp.
The below illustrates the setting of each gear limit fiducial value with an object lesson, suppose that LED street lamp single-lamp high voltage direct current constant-flow driver accepts the 220-300VDC dc powered, the rated operational voltage of LED street lamp is 220VDC, the threshold value of turning off the light that can set the LED street lamp is 200VDC, when input dc power is that 200VDC closes the LED street lamp when following.Limit fiducial value can be divided into 2,3,4 or 5 grades, concrete gear number of dividing is not limited to above-mentioned 2,3,4 or 5 grades, can set according to actual demand, suppose limit fiducial value is divided into 4 grades, that is 220-240VDC, 240-260VDC, 260-280VDC and 280-300VDC, each gear limit fiducial value can corresponding current value, above-mentioned electric current is provided by constant-current source, when the dc voltage value that detects dropped in the scope of a certain gear, can regulate the constant-current source electric current was current value corresponding to this gear.
Line drop can be to dimming control signal, that is the impact that causes of voltage signal, the method that can adopt the method for calculating every grade of minimum voltage to divide light modulation shelves level reduces this impact, concrete adopt method that the method for calculating every grade of minimum voltage divides light modulation shelves level can for: when end street lamp electric current when maximum, be assumed to be 1A, measure its minimum voltage, be assumed to be 260VDC, first grade of regulated voltage signal scope is decided to be 260-300VDC, electric current is all by the 1A constant current output, by that analogy in this scope.When the single lamp high voltage direct current of initialization driver, with each grade voltage level division information write-enable device, by regulating the voltage of dc power supply, just can realize the stepping adjusting by programming device.
After load units 302 loaded each gear limit fiducial value, the second initialization unit 303 can initialization analog-to-digital conversion module and PWM module.The second initialization unit 303 is completed after analog-to-digital conversion module and PWM module, and converting unit 304 can be opened the analog-to-digital conversion to voltage signal, and the analog-to-digital conversion that above-mentioned converting unit 304 is opened voltage signal is in order to obtain the level information of voltage signal.Above-mentioned analog-to-digital conversion to voltage signal can condition trigger startup, also can be in starting state in the whole process that the LED street lamp uses always.
After converting unit 304 is completed the analog-to-digital conversion of voltage signal is completed, can obtain the analog-to-digital conversion result, the analog-to-digital conversion result is compared with each gear limit fiducial value, can obtain comparative result, what above-mentioned comparative result characterized is the residing gear of voltage signal level value.
For example each gear limit fiducial value is 220-240VDC, 240-260VDC, 260-280VDC and the 280-300VDC in step 202, the current value that 240-260VDC place gear is corresponding is 0.8A, after the analog-to-digital conversion of voltage signal is completed, obtaining the analog-to-digital conversion result is 255VDC, can know that this moment, voltage signal was in the gear of 240-260VDC.
Completing the analog-to-digital conversion result compares with each gear limit fiducial value, after acquisition unit 305 obtains comparative result, refresh unit 306 can refresh duty ratio according to comparative result, above-mentionedly refreshes the operation that duty ratio can realize regulating the aspects such as the brightness of LED street lamp or switch.
After refresh unit 306 refreshes duty ratio according to comparative result, can open next time the analog-to-digital conversion of voltage signal, can realize like this real-time monitoring to the LED road lamp system.
in the embodiment of the present invention, at first the first initialization unit 301 carries out initialization to single-chip microcomputer, then load units 302 loads each default gear limit fiducial value, follow the second initialization unit 303 initialization analog-to-digital conversion modules and PWM module, then converting unit 304 is opened analog-to-digital conversion, when analog-to-digital conversion is completed, read the analog-to-digital conversion result, and the analog-to-digital conversion result is compared with each gear limit fiducial value, obtain unit 305 and obtain comparative result, last root refresh unit 306 refreshes duty ratio according to comparative result can complete regulating and controlling to the LED street lamp, after completing above-mentioned adjusting to the LED street lamp, can open next time analog-to-digital conversion to voltage signal to realize the real-time monitoring to the LED road lamp system.Because LED method for controlling street lamps of the present invention directly utilizes the high-voltage DC power supply that drives street lamp as signal source, thereby greatly simplified the single-lamp controller structure, and can control easily and directly the LED road lamp system, simultaneously owing to adopting high voltage direct current as its power supply, driver has realized going power supply, and need not electrochemical capacitor, thereby can guarantee to greatest extent equipment long-life, improve its reliability.
The those skilled in the art can be well understood to, and is the convenience described and succinct, the system of foregoing description, and the specific works process of device and unit can with reference to the corresponding process in preceding method embodiment, not repeat them here.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (5)

1. a LED method for controlling street lamps, is characterized in that, comprising:
Single-chip microcomputer is carried out initialization;
Load each default gear limit fiducial value;
Initialization analog-to-digital conversion module and PWM module;
The analog-to-digital conversion of unlatching to voltage signal;
When the analog-to-digital conversion of voltage signal is completed, read the analog-to-digital conversion result, and described analog-to-digital conversion result is compared with described each gear limit fiducial value, obtain comparative result;
Refresh duty ratio according to described comparative result.
2. LED method for controlling street lamps according to claim 1, is characterized in that, also comprises after step refreshes duty ratio according to described comparative result:
Open next time the analog-to-digital conversion to voltage signal.
3. LED method for controlling street lamps according to claim 1, is characterized in that, describedly single-chip microcomputer is carried out initialization comprises:
Register in single-chip microcomputer, timer and input/output port are carried out initialization.
4. a LED roam lamp control device, is characterized in that, comprising:
The first initialization unit is used for single-chip microcomputer is carried out initialization;
Load units is used for loading each default gear limit fiducial value;
The second initialization unit is used for initialization analog-to-digital conversion module and PWM module;
Converting unit is used for opening the analog-to-digital conversion to voltage signal;
Obtain the unit, be used for reading the analog-to-digital conversion result, and described analog-to-digital conversion result being compared with described each gear limit fiducial value when the analog-to-digital conversion of voltage signal is completed, obtain comparative result;
Refresh unit is used for refreshing duty ratio according to described comparative result.
5. LED roam lamp control device according to claim 4, is characterized in that, described acquisition unit comprises and reads subelement and subelement relatively;
The described subelement that reads is used for reading the analog-to-digital conversion result when the analog-to-digital conversion of voltage signal is completed;
Described relatively subelement is used for described analog-to-digital conversion result is compared with described each gear limit fiducial value, obtains comparative result.
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CN102176806A (en) * 2011-03-15 2011-09-07 谢俊国 Multichannel multiphase-driving LED (Light Emitting Diode) power supply

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WO2014127694A1 (en) * 2013-02-19 2014-08-28 广东南能汇智节能科技有限公司 Led street lamp control method and apparatus
CN103281848A (en) * 2013-06-20 2013-09-04 广州从兴电子开发有限公司 Control method and control device of LED street lamp
CN103281848B (en) * 2013-06-20 2016-06-08 南方电网综合能源有限公司 A kind of control method of LED street lamp and device
CN103391672A (en) * 2013-08-12 2013-11-13 铜陵学院 Single lamp control device for remote measurement and control

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