WO2018126751A1 - 一种高精度的led调频系统及led调频灯 - Google Patents

一种高精度的led调频系统及led调频灯 Download PDF

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Publication number
WO2018126751A1
WO2018126751A1 PCT/CN2017/105210 CN2017105210W WO2018126751A1 WO 2018126751 A1 WO2018126751 A1 WO 2018126751A1 CN 2017105210 W CN2017105210 W CN 2017105210W WO 2018126751 A1 WO2018126751 A1 WO 2018126751A1
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unit
led
frequency
control unit
frequency modulation
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PCT/CN2017/105210
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English (en)
French (fr)
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万长林
万晓琳
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万长林
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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]
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/305—Frequency-control circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the utility model relates to the technical field of LED frequency modulation, in particular to a high-precision LED frequency modulation system and an LED frequency modulation lamp.
  • the LED lamp is a kind of lamp that uses a light emitting diode (Light Emitting Diode) as a light source, and is widely used in various scenes because of its high luminous efficiency, energy saving, and good seismic performance.
  • LED lights on the market can be divided into two modes: AC and DC power supply. Since AC power has a certain frequency, AC-powered LED lights emit light at the same frequency as power supply AC under normal conditions, but there are two AC power supply modes. The main problem is that the AC will still have its natural frequency after being transformed and rectified by the modulation circuit. This natural frequency will interfere with the frequency of the strobe signal, resulting in the frequency of the actual flashing of the LED being unstable and accurate. Second, there is no internal battery. Can not be used outside the external power supply.
  • the frequency modulation control mode of the existing adjustable frequency LED lamp is an open loop control structure, that is to say, the frequency modulation control is only responsible for the output frequency, and does not measure and feedback the output frequency, so the frequency modulation accuracy cannot be guaranteed.
  • the stroboscopic signal in the Chinese patent "An LED automatic synchronous strobe device and its control method" provided by the patent number ZL201410445221 is triggered by an external knob.
  • This method has two main problems, one is the need for a button or The continuous action LED of the knob can continue to flash, which affects the service life of the device.
  • the accuracy of the external signal is not easy to control, which is not conducive to stable and continuous stroboscopic output.
  • the utility model provides a high-precision LED frequency modulation system and an LED frequency modulation lamp, which solves the technical problem of accurately adjusting the flash frequency by using a closed-loop control structure of a photosensitive sensor with a feedback, a rotary encoder and a main control unit of the single chip microcomputer.
  • the utility model provides a high-precision LED frequency modulation system, which is provided with an LED lighting unit, the LED lighting unit is connected with a switch switching unit and a charging control unit, and a single-chip microcomputer main control unit is also provided, the single-chip microcomputer The main control unit is connected to the switch switching unit, the charging control unit, the frequency adjusting unit, the photosensitive sensing unit, and the display unit;
  • the switch switching unit is provided with a switch component, and the LED light-emitting unit is controlled to be turned on, off, and restarted by the switch state combination of the switch component, and sends a display switch control signal to the single-chip microcomputer main control unit;
  • the frequency adjustment unit is configured to generate a frequency adjustment signal and set a target illumination frequency value
  • the photosensitive sensing unit is configured to measure an actual lighting frequency value of the LED lighting unit
  • the single-chip microcomputer main control unit is configured to adjust the actual lighting frequency value of the LED lighting unit to reach the target lighting frequency value according to the deviation between the actual lighting frequency value and the target lighting frequency value;
  • the single-chip microcomputer main control unit is further configured to control the display unit to display a target lighting frequency value and an actual lighting frequency value according to the received display switch control signal.
  • the LED lighting unit is provided with an LED light source; the switch component of the switch switching unit includes at least one switch button.
  • the charging control unit is provided with a rechargeable battery and a battery charger connected to both ends of the rechargeable battery and the main control unit of the single chip microcomputer.
  • the frequency adjustment unit is provided with an adjustment knob and a rotary encoder connected between the adjustment knob and the single-chip microcomputer main control unit; and changing the coding value of the rotary encoder by rotating the adjustment knob is different The target illumination frequency value.
  • the MCU main control unit is provided with a microcontroller and an internal clock, and the internal clock controls the frequency triggering of the target lighting frequency value and the actual lighting frequency value.
  • the photosensitive sensing unit is provided with a photosensitive sensor, and the photosensitive sensor collects the illumination intensity of the LED light source, and the actual illumination frequency value is obtained according to the illumination time interval or the extinction time interval of the illumination intensity.
  • the display unit is provided with an LCD display screen, and is also used for displaying the single-chip computer master control list. Real-time battery power information and battery real-time temperature information.
  • the utility model also provides a high-precision LED frequency modulation lamp, which is provided with an LED sleeve frame, a base and a bracket connecting the base and the LED sleeve frame; the base, the bracket and the LED sleeve frame are internally equipped with a PCB board;
  • the LED board is provided with the LED lighting unit, the single chip microcomputer main control unit, the photosensitive sensing unit, the frequency adjusting unit, the charging control unit, the display unit and the switch switching unit.
  • the bracket is a deformable bracket; the LED sleeve surface is provided with an LED opening for fitting an LED light source of the LED lighting unit; and the charging surface is provided with the charging control unit a wire opening of the AC charger, a sensor opening of the photosensitive sensor of the photosensitive sensing unit, a button opening of the switch button of the switch switching unit, and an adjustment knob of the frequency adjusting unit The knob is opened, and the LCD opening of the LCD display of the LCD display unit is fitted.
  • the utility model provides a high-precision LED frequency modulation system and an LED frequency modulation lamp, which adopts a closed-loop control structure of a photosensitive sensor with a feedback, a rotary encoder and a main control unit of a single chip microcomputer, and the actual generation result is obtained by a control algorithm of a single-chip microcomputer main control unit.
  • the flash frequency is accurate and stable; the AC charging and DC power supply mode is provided to the flash frequency stable power supply, which makes the device more environmentally friendly and convenient, can be operated separately from the external power supply, and has wider utility; through buttons and knobs
  • the switch control and frequency adjustment of the device are performed, and the operating state of the system and the device is displayed through the display unit, which not only conforms to the humanized design but also ensures the openness and effectiveness of the information, and has broad application prospects.
  • FIG. 1 is a system block diagram of a high-precision LED frequency modulation system provided by an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a circuit principle of a high-precision LED frequency modulation system according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a high-precision LED frequency modulation apparatus according to an embodiment of the present invention.
  • the high-precision LED frequency modulation system is provided with an LED lighting unit 10, the LED lighting unit 10 is connected to the switch switching unit 20 and the charging control unit 30, and is also provided with a single-chip microcomputer main control unit 40.
  • the single-chip microcomputer main control unit 40 is connected to the switch switching unit 20, the charging control unit 30, the frequency adjusting unit 50, the photosensitive sensing unit 60, and the display unit 70;
  • the switch switching unit 20 is provided with a switch component, and the switch component includes at least one switch button; the switch state of the switch button is used to control the power on, off, and restart of the LED light-emitting unit 10, and
  • the single-chip microcomputer main control unit 40 issues a display switch control signal;
  • the frequency adjustment unit 50 is configured to generate a frequency adjustment signal, and set a target illumination frequency value K;
  • the photosensitive sensing unit 60 is configured to measure an actual luminous frequency value K' of the LED lighting unit 10;
  • the single-chip microcomputer main control unit 40 is configured to adjust the actual lighting frequency value K′ of the LED lighting unit 10 to reach the target lighting frequency value K according to the deviation between the actual lighting frequency value K′ and the target lighting frequency value K. ;
  • the MCU main control unit 40 is further configured to control the display unit 70 to display the target lighting frequency value K and the actual lighting frequency value K' according to the received display switch control signal.
  • the LED lighting unit 10 is mainly provided with an LED light source 11 , and different numbers and different colors of LEDs for different purposes can be provided according to user requirements;
  • the switch component of the switch switching unit 20 includes at least one The switch button 21, for example, in the case where only one switch button 21 is provided, the switch button 21 is short pressed to perform the connection and disconnection of the LED lighting unit 10, and the long press of the switch button 21 can force the MCU main control unit 40 to restart. Double clicking the switch button 21 can switch the display unit 70 to display different contents.
  • the above functions can also be realized by providing a plurality of switch buttons 21.
  • the charging control unit 30 is provided with a rechargeable battery 31 and a battery charger 32 connected to both ends of the rechargeable battery 31 and the single-chip microcomputer control unit 40; thus, the power supply of AC charging and DC power supply is adopted.
  • the method is provided to the flash frequency stable power supply, so that the device using the system is more environmentally friendly and convenient, and can be operated separately from the external power source, and has wider utility.
  • the rechargeable battery 31 can be controlled by the single-chip microcomputer main control unit 40 to perform intelligent charging by the AC charger 26, and start charging when the battery power is lower than a certain level (for example, less than 20%), when the load voltage is lower than the floating charging voltage,
  • the 51 single-chip microcomputer controls the output of the battery charger 32 to be constant current charging, automatically switches to constant voltage charging when the load voltage reaches the floating charging voltage, stops charging after the battery is full, and can monitor the battery power and temperature in real time during the charging process.
  • the rechargeable battery 31 not only supplies power to the LED light source 11 but also supplies power to the single-chip microcomputer main control unit 40. When there is no external alternating current, the LED light can be ensured to operate normally for a long time.
  • the rechargeable battery 31 can be set as a rechargeable battery of different capacity.
  • the rechargeable battery 31 can also be set as a solar battery, by increasing solar power collection.
  • the board can be removed by removing the original battery charger 32 and changing the appropriate circuitry.
  • the frequency adjustment unit 50 is provided with an adjustment knob 51 and a rotary encoder 52 connected between the adjustment knob 51 and the single-chip microcomputer main control unit 40;
  • the coded value of the rotary encoder 52 sets different target light-emitting frequency values K;
  • the single-chip microcomputer main control unit 40 is provided with a microcontroller 41, preferably 51 single-chip microcomputer, and an internal clock 411, the internal The clock 411 controls the frequency of the target light-emitting frequency value K and the actual light-emitting frequency value K′;
  • the photosensitive sensor unit 60 is provided with a light-sensitive sensor 61, and the light-sensitive sensor 61 collects the light intensity of the LED light source 11 according to The illumination time interval or the extinction time interval of the illumination intensity is obtained to obtain the actual illumination frequency value K'.
  • the frequency adjustment range of the adjustment knob 51 can be set to 0.01 to 1000 Hz
  • the duration of the LED light source 11 being turned on and off, the on/off of the switch button 21 on the power supply circuit of the LED light source 11 is controlled by the timing function of the internal clock 411, after a connected state of T+t time , followed by a disconnection state of T+t time, where t is the fine-tuning time,
  • the calculation of the fine adjustment time t is first calculated based on the deviation of the actual illumination frequency value K' measured by the photosensor 61 and the target illumination frequency value K, and then the fine adjustment time t is calculated according to a control algorithm (such as a PID incremental control algorithm). :
  • t(k) is the fine-tuning time for the kth measurement
  • e(k), e(k-1), and e(k-2) are the kth, k-1th, and k-2th times, respectively.
  • the time deviation during measurement, q0, q1, and q2 are the proportional differential integration algorithm coefficients.
  • the illumination frequency of the LED light source 11 can be accurately adjusted, so that the LED light source 11 performs the blinking illumination with the target illumination frequency value KK accurately and stably.
  • the display unit 70 is provided with an LCD display 71.
  • the display unit 70 is further configured to display the battery emitted by the single-chip microcomputer main control unit 40.
  • Real-time electricity information and real-time battery temperature information make it easy for users to obtain relevant information in a timely manner. It not only conforms to humanized design but also ensures the openness and validity of information, and has broad application prospects.
  • the LCD display 71 can be selected from the LCD 1602 dot matrix liquid crystal display, which can display two lines of 16 characters each, and the screen size and display range can basically meet the display requirements.
  • the present invention provides a high-precision LED frequency modulation lamp, which is provided with an LED sleeve 1, a base 2, and a bracket 3 connecting the base 2 and the LED sleeve 1; the base 2, the bracket 3 And the LED sleeve 1 is internally equipped with a PCB board 4; the PCB board 4 is provided with the LED lighting unit 10, the single-chip main control unit 40, and the photosensitive sensing unit corresponding to the above-mentioned high-precision LED frequency modulation system.
  • the PCB board 4 is provided with the LED lighting unit 10, the single-chip main control unit 40, and the photosensitive sensing unit corresponding to the above-mentioned high-precision LED frequency modulation system.
  • the bracket 3 is a deformable bracket, and the LED sleeve 1 is provided with an LED opening 5 for fitting the LED light source 11 of the LED lighting unit 10; the base 2 is provided with a fitting on the surface thereof.
  • the wire opening 6 of the battery charger 32 of the charging control unit 30, the sensor opening 7 of the photosensitive sensor 61 fitting the photosensitive sensing unit 60, and the button of the switch button 21 fitting the switching unit 20 are opened.
  • a hole 8 a knob opening 9 of the adjustment knob 51 of the frequency adjustment unit 50, and a fitting of the LCD
  • the user can realize the high-precision automatic adjustment of the target light-emitting frequency value K set by the user by simply operating the battery charger 32, the button and the adjustment knob 51.

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Abstract

一种高精度的LED调频系统及LED调频灯，设有LED发光单元（10），LED发光单元连接开关切换单元（20）和充电控制单元（30），还设有单片机主控单元（40），单片机主控单元连接开关切换单元、充电控制单元、频率调节单元（50）、光敏传感单元（60）、显示单元（70）。该高精度的LED调频系统及LED调频灯，通过带反馈的光敏传感器（61）、旋转编码器（52）与单片机主控单元的闭环控制结构，通过单片机主控单元的控制算法使得实际产生的闪光频率精确而稳定；采用交流充电、直流供电的供电方式，提供给闪光频率稳定电源的前提下，使得装置更环保便捷，能够脱离外接电源而单独运行。

Description

一种高精度的LED调频系统及LED调频灯 技术领域
本实用新型涉及LED调频技术领域，尤其涉及一种高精度的LED调频系统及LED调频灯。
背景技术
LED灯是采用发光二极管(Light Emitting Diode)作为光源的一种灯具，因其发光效率高、节能省电、抗震性能好等优点而广泛应用于各种场景中。目前市场上的LED灯通常可分为交流和直流供电两种方式，由于交流电具有一定的频率，所以交流供电的LED灯在正常情况下以供电交流相同的频率发光，但交流供电方式有两个主要问题，一是交流电经过调制电路变压和整流后仍会有其固有频率，这个固有频率会对频闪信号频率产生干扰，导致LED实际闪烁的频率并不稳定和准确；二是没有内部电池，不能脱离外接电源使用。
而现有的可调频率LED灯的调频控制方式为开环控制结构，也就是说调频控制只负责输出频率，而不对输出频率进行测量和反馈，所以调频精度不能保证。
此外，专利号为ZL201410445221提供的中国专利《一种LED自动同步频闪装置及其控制方法》中的频闪信号是由外部旋钮触发的，这种方式有两个主要问题，一是需要按钮或旋钮持续动作LED才能持续闪烁，影响装置使用寿命，二是外部信号精度不易控制，不利于稳定持续的频闪输出。
发明内容
本实用新型提供一种高精度的LED调频系统及LED调频灯，解决了采用带反馈的光敏传感器、旋转编码器与单片机主控单元的闭环控制结构来精确调整闪光频率的技术问题。
为解决以上技术问题，本实用新型提供一种高精度的LED调频系统，设有LED发光单元，所述LED发光单元连接开关切换单元和充电控制单元，还设有单片机主控单元，所述单片机主控单元连接所述开关切换单元、充电控制单元、频率调节单元、光敏传感单元、显示单元；
所述开关切换单元设置有开关组件，通过所述开关组件的开关状态组合控制所述LED发光单元接通、断开、重启，并向所述单片机主控单元发出显示开关控制信号；
所述频率调节单元用于产生频率调节信号，设置目标发光频率值；
所述光敏传感单元用于测量所述LED发光单元的实际发光频率值；
所述单片机主控单元用于根据所述实际发光频率值与目标发光频率值的偏差，采用控制算法将LED发光单元的实际发光频率值调整为达到目标发光频率值；
所述单片机主控单元还用于根据接收的所述显示开关控制信号控制所述显示单元显示目标发光频率值和实际发光频率值。
进一步地，所述LED发光单元设有LED光源；所述开关切换单元的开关组件包括至少一个开关按钮。
进一步地，所述充电控制单元设有可充电电池及连接于所述可充电电池正负极两端和所述单片机主控单元的电池充电器。
进一步地，所述频率调节单元设有调节旋钮及连接于所述调节旋钮与所述单片机主控单元之间的旋转编码器；通过旋转所述调节旋钮改变所述旋转编码器的编码值设置不同的所述目标发光频率值。
进一步地，所述单片机主控单元设有微控制器和内部时钟，所述内部时钟控制所述目标发光频率值、实际发光频率值的频率触发。
进一步地，所述光敏传感单元设有光敏传感器，所述光敏传感器采集所述LED光源的光照强度，根据所述光照强度的照射时间间隔或熄灭时间间隔，得到所述实际发光频率值。
进一步地，所述显示单元设有LCD显示屏，还用于显示所述单片机主控单 元发出的电池实时电量信息及电池实时温度信息。
本实用新型还提供一种高精度的LED调频灯，设有LED套架、底座以及连接所述底座与LED套架的支架；所述底座、支架及LED套架内部装配有PCB板；所述PCB板上设有所述LED发光单元、单片机主控单元、光敏传感单元、频率调节单元、充电控制单元、显示单元和开关切换单元。
更进一步地，所述支架为可变形支架；所述LED套架表面上设有嵌合所述LED发光单元的LED光源的LED开孔；所述底座表面上设有嵌合所述充电控制单元的交流充电器的电线开孔、嵌合所述光敏传感单元的光敏传感器的传感器开孔、嵌合所述开关切换单元的开关按钮的按钮开孔、嵌合所述频率调节单元的调节旋钮的旋钮开孔、嵌合所述LCD显示单元的LCD显示屏的LCD开孔。
本实用新型提供的一种高精度的LED调频系统及LED调频灯，通过带反馈的光敏传感器、旋转编码器与单片机主控单元的闭环控制结构，通过单片机主控单元的控制算法使得实际产生的闪光频率精确而稳定；采用交流充电、直流供电的供电方式，提供给闪光频率稳定电源的前提下，使得装置更环保便捷，能够脱离外接电源而单独运行，实用性更广；通过按钮和旋钮来进行装置的开关控制和频率调节，并通过显示单元显示系统及装置的运行状态，既符合人性化的设计又保证了信息的公开性与有效性，具有广大的应用前景。
附图说明
图1是本实用新型实施例提供的一种高精度的LED调频系统的系统模块图；
图2是本实用新型实施例提供的一种高精度的LED调频系统的电路原理简图；
图3是本实用新型实施例提供的一种高精度的LED调频装置的结构示意图。
具体实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述。以下元器件仅为较佳实施例，不构成对本实用新型保护范围的限制。
参见图1，是本实用新型实施例提供的一种高精度的LED调频系统的系统模块图。在本实施例中，所述的一种高精度的LED调频系统，设有LED发光单元10，所述LED发光单元10连接开关切换单元20和充电控制单元30，还设有单片机主控单元40，所述单片机主控单元40连接所述开关切换单元20、充电控制单元30、频率调节单元50、光敏传感单元60、显示单元70；
所述开关切换单元20设置有开关组件，所述开关组件包括至少一个开关按钮；通过所述开关按钮的开关状态组合控制所述LED发光单元10电源的接通、断开、重启，并向所述单片机主控单元40发出显示开关控制信号；
所述频率调节单元50用于产生频率调节信号，设置目标发光频率值K；
所述光敏传感单元60用于测量所述LED发光单元10的实际发光频率值K’；
所述单片机主控单元40用于根据所述实际发光频率值K’与目标发光频率值K的偏差，采用控制算法将LED发光单元10的实际发光频率值K’调整为达到目标发光频率值K；
所述单片机主控单元40还用于根据接收的所述显示开关控制信号控制所述显示单元70显示目标发光频率值K和实际发光频率值K’。
参见图2，是本实用新型实施例提供的一种高精度的LED调频系统的电路原理简图。在本实施例中，所述LED发光单元10主要设有LED光源11，可根据用户需求设有不同数量及不同颜色的用于不同用途的LED；所述开关切换单元20的开关组件包括至少一个开关按钮21，比如，在只设置一个开关按钮21的情况下，短按所述开关按钮21进行LED发光单元10的联通与断开，长按开关按钮21可强制单片机主控单元40重新启动，双击开关按钮21可切换显示单元70显示不同的内容。上述功能也可以通过设置多个开关按钮21来实现。
所述充电控制单元30设有可充电电池31及连接于所述可充电电池31正负极两端和所述单片机主控单元40的电池充电器32；如此，采用交流充电、直流供电的供电方式，提供给闪光频率稳定电源的前提下，使得运用该系统的装置更环保便捷，能够脱离外接电源而单独运行，实用性更广。可充电电池31可由所述单片机主控单元40控制交流充电器26进行智能充电，在电池电量低于某个程度时(比如低于20％)开始充电，当负载电压低于浮充电压时，所述51单片机控制所述电池充电器32输出为恒流充电，当负载电压达到浮充电压时自动切换到恒压充电，电量充满后停止充电，并可在充电过程中实时监控电池电量和温度；所述可充电电池31除了为所述LED光源11供电外还为单片机主控单元40供电，当没有外接交流电时也可保证LED灯正常运行足够长时间。
根据不同的客户群体或实用场景，可设置所述可充电电池31为不同的容量大小的充电电池，在某些极端环境下，也可以设置该可充电电池31为太阳能电池，通过增加太阳能集电板撤掉原先的电池充电器32以及更改适当电路便能够实现。
在本实施例中，所述频率调节单元50设有调节旋钮51及连接于所述调节旋钮51与所述单片机主控单元40之间的旋转编码器52；通过旋转所述调节旋钮51改变所述旋转编码器52的编码值设置不同的所述目标发光频率值K；所述单片机主控单元40设有微控制器41，优选地可采用51单片机，还设有内部时钟411，所述内部时钟411控制所述目标发光频率值K、实际发光频率值K’的频率触发；所述光敏传感单元60设有光敏传感器61，所述光敏传感器61采集所述LED光源11的光照强度，根据所述光照强度的照射时间间隔或熄灭时间间隔，得到所述实际发光频率值K’。
即是上述调节旋钮51的频率调节范围可设置为0.01～1000Hz，所述微控制器41接收所述旋转编码器52的编码转换成目标发光频率值K，然后按照T＝1/2K的方式计算所述LED光源11点亮和熄灭的持续时间，通过所述内部时钟411的定时功能控制所述LED光源11供电电路上的开关按钮21部分的通断，在一个T+t时间的连通状态后，跟随一个T+t时间的断开状态，其中t为微调时间， 微调时间t的计算首先根据光敏传感器61测量的实际发光频率值K’和目标发光频率值K的偏差计算得到的时间偏差e，然后根据控制算法(比如PID增量型控制算法)计算微调时间t:
t(k)＝q0e(k)+q1e(k-1)+q2e(k-2)
其中t(k)为第k次测量时的微调时间，e(k)、e(k-1)、e(k-2)分别为第k次、第k-1次、第k-2次测量时的时间偏差，q0、q1、q2为比例微分积分算法系数。
通过上述带反馈的光敏传感器61、旋转编码器52与单片机主控单元40的闭环控制结构能够精确调整LED光源11的发光频率，使得LED光源11以准确稳定地以目标发光频率值KK进行闪烁发光。
在本实施例中，所述显示单元70设有LCD显示屏71，除了显示上述的目标发光频率值K及实际发光频率值K’外，还用于显示所述单片机主控单元40发出的电池实时电量信息及电池实时温度信息，便于用户及时获取相关信息，既符合人性化的设计又保证了信息的公开性与有效性，具有广大的应用前景。所述LCD显示屏71可选用LCD1602点阵式液晶显示屏，可以显示两行，每行16个字符，屏幕大小及显示范围基本可以满足显示需求。
参见图3，是本实用新型实施例提供的一种高精度的LED调频装置的结构示意图。在本实施例中，本实用新型提供一种高精度的LED调频灯，设有LED套架1、底座2以及连接所述底座2与LED套架1的支架3；所述底座2、支架3及LED套架1内部装配有PCB板4；所述PCB板4上设有与上述的一种高精度的LED调频系统对应的所述LED发光单元10、单片机主控单元40、光敏传感单元60、频率调节单元50、充电控制单元30、显示单元70和开关切换单元20。
其中，所述支架3为可变形支架，所述LED套架1表面上设有嵌合所述LED发光单元10的LED光源11的LED开孔5；所述底座2表面上设有嵌合所述充电控制单元30的电池充电器32的电线开孔6、嵌合所述光敏传感单元60的光敏传感器61的传感器开孔7、嵌合所述开关切换单元20的开关按钮21的按钮开孔8、嵌合所述频率调节单元50的调节旋钮51的旋钮开孔9、嵌合所述LCD 显示单元70的LCD显示屏71的LCD开孔100。
如此，用户通过只需操作电池充电器32、所述按钮及调节旋钮51便可实现用户自设定的目标发光频率值K的高精度自动调节。
以上所述是本实用新型的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本实用新型原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本实用新型的保护范围。

Claims (9)

  1. 一种高精度的LED调频系统，设有LED发光单元，其特征在于，所述LED发光单元连接开关切换单元和充电控制单元，还设有单片机主控单元，所述单片机主控单元连接所述开关切换单元、充电控制单元、频率调节单元、光敏传感单元、显示单元；
    所述开关切换单元设置有开关组件，通过所述开关组件的开关状态组合控制所述LED发光单元接通、断开、重启，并向所述单片机主控单元发出显示开关控制信号；
    所述频率调节单元用于产生频率调节信号，设置目标发光频率值；
    所述光敏传感单元用于测量所述LED发光单元的实际发光频率值；
    所述单片机主控单元用于根据所述实际发光频率值与目标发光频率值的偏差，采用控制算法将LED发光单元的实际发光频率值调整为达到目标发光频率值；
    所述单片机主控单元还用于根据接收的所述显示开关控制信号控制所述显示单元显示目标发光频率值和实际发光频率值。
  2. 如权利要求1所述的一种高精度的LED调频系统，其特征在于：所述LED发光单元设有LED光源；所述开关切换单元的开关组件包括至少一个开关按钮。
  3. 如权利要求1所述的一种高精度的LED调频系统，其特征在于：所述充电控制单元设有可充电电池及连接于所述可充电电池正负极两端和所述单片机主控单元的电池充电器。
  4. 如权利要求1所述的一种高精度的LED调频系统，其特征在于：所述频率调节单元设有调节旋钮及连接于所述调节旋钮与所述单片机主控单元之间的旋转编码器；通过旋转所述调节旋钮改变所述旋转编码器的编码值设置不同 的所述目标发光频率值。
  5. 如权利要求1所述的一种高精度的LED调频系统，其特征在于：所述单片机主控单元设有微控制器和内部时钟，所述内部时钟控制所述目标发光频率值、实际发光频率值的频率触发。
  6. 如权利要求1或2所述的一种高精度的LED调频系统，其特征在于：所述光敏传感单元设有光敏传感器，所述光敏传感器采集所述LED光源的光照强度，根据所述光照强度的照射时间间隔或熄灭时间间隔，得到所述实际发光频率值。
  7. 如权利要求1所述的一种高精度的LED调频系统，其特征在于：所述显示单元设有LCD显示屏，还用于显示所述单片机主控单元发出的电池实时电量信息及电池实时温度信息。
  8. 一种高精度的LED调频灯，其特征在于，设有LED套架、底座以及连接所述底座与LED套架的支架；所述底座、支架及LED套架内部装配有PCB板；所述PCB板上设有所述LED发光单元、单片机主控单元、光敏传感单元、频率调节单元、充电控制单元、显示单元和开关切换单元。
  9. 如权利要求8所述的一种高精度的LED调频灯，其特征在于：所述支架为可变形支架；所述LED套架表面上设有嵌合所述LED发光单元的LED光源的LED开孔；所述底座表面上设有嵌合所述充电控制单元的交流充电器的电线开孔、嵌合所述光敏传感单元的光敏传感器的传感器开孔、嵌合所述开关切换单元的开关按钮的按钮开孔、嵌合所述频率调节单元的调节旋钮的旋钮开孔、嵌合所述LCD显示单元的LCD显示屏的LCD开孔。
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