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WO2022237285A1 - 一种激光二极管的控制方法、控制系统及激光仪器 - Google Patents

一种激光二极管的控制方法、控制系统及激光仪器 Download PDF

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Publication number
WO2022237285A1
WO2022237285A1 PCT/CN2022/079068 CN2022079068W WO2022237285A1 WO 2022237285 A1 WO2022237285 A1 WO 2022237285A1 CN 2022079068 W CN2022079068 W CN 2022079068W WO 2022237285 A1 WO2022237285 A1 WO 2022237285A1
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Prior art keywords
laser diode
duty cycle
driving voltage
control unit
voltage
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PCT/CN2022/079068
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English (en)
French (fr)
Inventor
张瓯
傅俊杰
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常州华达科捷光电仪器有限公司
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Priority claimed from CN202110500137.3A external-priority patent/CN115313146A/zh
Priority claimed from CN202120981440.5U external-priority patent/CN214589682U/zh
Application filed by 常州华达科捷光电仪器有限公司 filed Critical 常州华达科捷光电仪器有限公司
Priority to EP22806262.6A priority Critical patent/EP4336682A4/en
Priority to US18/289,838 priority patent/US20240235153A9/en
Publication of WO2022237285A1 publication Critical patent/WO2022237285A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
    • H01S5/042—Electrical excitation ; Circuits therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
    • H01S5/042—Electrical excitation ; Circuits therefor
    • H01S5/0428—Electrical excitation ; Circuits therefor for applying pulses to the laser
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/024—Arrangements for thermal management
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06209—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in single-section lasers
    • H01S5/06216—Pulse modulation or generation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/06825—Protecting the laser, e.g. during switch-on/off, detection of malfunctioning or degradation

Definitions

  • the invention relates to the technical field of laser instruments, in particular to a laser diode control method, a control system and a laser instrument.
  • the object of the present invention is to provide a control method, control system and laser instrument capable of reducing the power consumption of the laser diode during operation and avoiding the overheating of the laser diode during operation.
  • the invention discloses a control method of a laser diode, comprising:
  • the laser diode When the working time of the laser diode exceeds the first time threshold, the laser diode is driven to work with a second driving voltage and a second duty cycle, wherein the second driving voltage is smaller than the first driving voltage, and /or, the second duty ratio is smaller than the first duty ratio.
  • control method also includes:
  • the laser diode When the working time of the laser diode exceeds the second time threshold, the laser diode is driven to work with a third duty cycle, wherein the second time threshold is greater than the first time threshold, and the third duty cycle is smaller than the second duty cycle.
  • the first driving voltage is 7.3V-8.0V;
  • the first duty cycle is 85% to 95%
  • the first time threshold is 50 to 70 minutes
  • the second driving voltage is 6.5V-7.3V
  • the second duty cycle is 75%-85%
  • the second time threshold is 80 to 100 minutes
  • the third duty cycle is 65%-75%.
  • the first driving voltage is 7.7V
  • the first duty cycle is 90%
  • the first time threshold is 60 minutes
  • the second driving voltage is 6.9V
  • the second duty cycle is 80%
  • the second time threshold is 90 minutes
  • the third duty cycle is 70%.
  • the invention also discloses a laser diode control system, including:
  • a voltage control unit connected to the laser diode, for changing the driving voltage of the laser diode
  • a duty ratio control unit connected to the laser diode, for changing the duty ratio of the laser diode
  • a timing unit used to obtain the continuous working time of the laser diode
  • the control unit is connected with the voltage control unit, the duty cycle control unit and the timing unit, and is used for changing the driving voltage and/or the duty cycle of the laser diode according to the continuous working time of the laser diode.
  • the voltage control unit includes a DCDC voltage conversion module
  • the VOUT end of the DCDC voltage conversion module is connected to a laser diode
  • the FB end of the DCDC voltage conversion module is connected to the VOUT end through a first resistor, grounded through a second resistor, connected to the first end of a switch tube through a third resistor, the second end of the switch tube is grounded, and the switch tube
  • the third terminal is connected to the control unit.
  • the switching transistor is an NMOS transistor
  • the drain of the NMOS transistor is connected to the third resistor
  • the source is grounded
  • the gate is connected to the control unit.
  • control unit is an MCU
  • timing unit is a timer on the MCU
  • the duty cycle control unit is a PWM drive circuit.
  • the present invention also discloses a laser instrument, which is characterized in that it includes the above-mentioned control system.
  • the beneficial effect is that the working voltage and/or the duty cycle of the laser diode can be reduced according to the working time by taking advantage of the relatively large margin of the working voltage of the laser diode under the condition of high temperature. Ratio, thereby reducing the power consumption of the laser diode, lowering its operating temperature, prolonging the service life without affecting the luminous effect, and reducing safety risks.
  • Fig. 1 is the flowchart of the control method of laser diode in an embodiment of the present invention
  • Fig. 2 is the structural representation of the control system of laser diode in an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a DCDC voltage conversion module in the voltage control unit in FIG. 2;
  • FIG. 4 is an expanded view of the internal circuit of the DCDC voltage conversion module in FIG. 3 .
  • FIG. 5 shows the relationship between power consumption and time of a laser diode in an embodiment of the invention and in the prior art.
  • first, second, third, etc. may be used in the present disclosure to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the present disclosure, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the word “if” as used herein may be interpreted as “at” or “when” or “in response to a determination.”
  • connection should be understood in a broad sense, for example, it can be mechanical connection or electrical connection, or two
  • connection should be understood in a broad sense, for example, it can be mechanical connection or electrical connection, or two
  • connection should be understood in a broad sense, for example, it can be mechanical connection or electrical connection, or two
  • the internal communication of each element may be directly connected or indirectly connected through an intermediary.
  • intermediary Those skilled in the art can understand the specific meanings of the above terms according to specific situations.
  • the present invention discloses a kind of control method of laser diode, described method is based on a laser diode control system, referring to accompanying drawing 2, described control system comprises voltage control unit, duty ratio control unit, timing unit and control unit.
  • the voltage control unit is connected with the laser diode and used for changing the driving voltage of the laser diode.
  • the voltage control unit includes a DCDC voltage conversion module, see Figures 3 and 4, the VOUT terminal of the DCDC voltage conversion module is connected to a laser diode; the FB terminal of the DCDC voltage conversion module is passed through
  • the first resistor R1 is connected to the VOUT terminal, grounded through the second resistor R2, connected to the first end of a switch tube through the third resistor R3, the second end of the switch tube is grounded, and the third end of the switch tube is connected to the control unit .
  • the control unit is used to send a control signal to the switch tube to control whether the switch tube is turned on.
  • the switching transistor is an NMOS transistor, the drain of the NMOS transistor is connected to the third resistor, the source is grounded, and the gate is connected to the control unit.
  • those skilled in the art can replace the NMOS transistors with other switch transistors such as PMOS transistors and triodes as required.
  • the duty cycle control unit is connected to the laser diode and is used to change the duty cycle of the laser diode, and the duty cycle unit may be a PWM driving circuit.
  • the timing unit is used to obtain the continuous working time of the laser diode, specifically, it can start timing after the laser diode is working.
  • the control unit is connected with the voltage control unit, the duty cycle control unit and the timing unit, and is used for changing the driving voltage and/or the duty cycle of the laser diode according to the continuous working time of the laser diode.
  • the control unit is an MCU
  • the timing unit is a timer on the MCU. In some other embodiments, the timing unit may also be an independent timer.
  • the working voltage of the laser diode has a certain voltage range, and the relationship between its working voltage and working temperature is that the higher the temperature, the lower the working voltage requirement; the lower the temperature, the higher the working voltage requirement.
  • This application utilizes this feature, so under high temperature conditions, the operating voltage margin of the laser diode is relatively large.
  • This application utilizes this characteristic, and through the above-mentioned control system, it is possible to properly reduce the driving voltage and/or duty cycle of the laser diode after it has been working for a certain period of time (that is, when the temperature is high), so that it can operate without affecting the luminous effect. , significantly reducing power consumption.
  • control method of the laser diode includes:
  • the laser diode When the working time of the laser diode exceeds the first time threshold, the laser diode is driven to work with a second driving voltage and a second duty cycle, wherein the second driving voltage is smaller than the first driving voltage, and /or, the second duty ratio is smaller than the first duty ratio.
  • both the driving voltage and the duty cycle are reduced; in some embodiments, only one parameter of the voltage or the duty cycle may be reduced.
  • the MCU obtains the working time of the laser diode through the timer. The timer on the MCU starts counting after the laser diode works. The unit changes the driving voltage and the duty ratio, and drives the laser diode to work with the second driving voltage and the second duty ratio.
  • control method also includes:
  • the laser diode When the working time of the laser diode exceeds the second time threshold, the laser diode is driven to work with a third duty cycle, wherein the second time threshold is greater than the first time threshold, and the third duty cycle is smaller than the second duty cycle. In this step, the duty cycle is further reduced without changing the voltage.
  • the first driving voltage is 7.3V-8.0V; the first duty cycle is 85%-95%; the first time threshold is 50-70 minutes; the second driving voltage is 6.5 V ⁇ 7.3V; the second duty cycle is 75%-85%; the second time threshold is 80-100 minutes; the third duty cycle is 65%-75%.
  • the first driving voltage is 7.7V; the first duty cycle is 90%; the first time threshold T1 is 60 minutes; the second driving voltage is 6.9V; the second The duty cycle is 80%; the second time threshold T2 is 90 minutes; and the third duty cycle is 70%.
  • the present invention also provides a laser instrument including the above-mentioned control system, and the laser instrument may be a laser collimator, a laser line thrower, and the like.

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)

Abstract

一种激光二极管的控制方法、控制系统及激光仪器，控制方法包括：以第一驱动电压和第一占空比驱动激光二极管开始工作；获取激光二极管的工作时间；当激光二极管的工作时间超过第一时间阈值时，以第二驱动电压和第二占空比驱动激光二极管工作，其中，第二驱动电压小于第一驱动电压，且/或，第二占空比小于所述第一占空比。可以有效降低激光二极管工作过程中的功耗，避免了激光二极管在正常工作中温度过高的情况。

Description

一种激光二极管的控制方法、控制系统及激光仪器 技术领域
本发明涉及激光仪器技术领域，尤其涉及一种激光二极管的控制方法、控制系统及激光仪器。
背景技术
近几年随着绿色激光二极管的大规模运营，越来越多的产品使用了绿色激光二极管来达到更高的可视度，因为绿色激光二极管相对于红色激光二极管需要DC6V到DC8V的工作电压，而且电流相对也更高，所以工作功耗是相同功率红光的3倍左右，这也导致了仪器内部有更大的热量在工作中产生。过高的温度会影响激光二极管的正常工作，同时造成其使用寿命减少及带来安全隐患。
发明内容
为了克服上述技术缺陷，本发明的目的在于提供一种能够降低激光二极管工作中功耗，避免激光二极管工作中温度过高的控制方法、控制系统及激光仪器。
本发明公开了一种激光二极管的控制方法，包括：
以第一驱动电压和第一占空比驱动激光二级管开始工作；
获取所述激光二级管的工作时间；
当所述激光二极管的工作时间超过第一时间阈值时，以第二驱动电压和第二占空比驱动激光二级管工作，其中，所述第二驱动电压小于所述第一驱动电压，且/或，所述第二占空比小于所述第一占空比。
优选地，所述控制方法还包括：
当所述激光二极管的工作时间超过第二时间阈值时，以第三占空比驱动激光二级管工作，其中，第二时间阈值大于第一时间阈值，第三占空比小于所述第二占空比。
优选地，所述第一驱动电压为7.3V～8.0V；
所述第一占空比为85％～95％；
所述第一时间阈值为50～70分钟；
所述第二驱动电压为6.5V～7.3V；
所述第二占空比为75％-85％；
所述第二时间阈值为80～100分钟；
所述第三占空比为65％-75％。
优选地，所述第一驱动电压为7.7V；
所述第一占空比为90％；
所述第一时间阈值为60分钟；
所述第二驱动电压为6.9V；
所述第二占空比为80％；
所述第二时间阈值为90分钟；
所述第三占空比为70％。
本发明还公开了一种激光二极管的控制系统，包括：
电压控制单元，与所述激光二极管连接，用于改变激光二极管的驱动电压；
占空比控制单元，与所述激光二极管连接，用于改变激光二极管的占空比；
计时单元，用于获取激光二极管持续工作的时间；
控制单元，与所述电压控制单元、占空比控制单元和计时单元连接，用于根据激光二极管持续工作的时间，改变激光二极管的驱动电压和/或占空比。
优选地，所述电压控制单元包括DCDC电压转换模块；
所述DCDC电压转换模块的VOUT端连接激光二极管；
所述DCDC电压转换模块的FB端通过第一电阻连接VOUT端，通过第二电阻接地，通过第三电阻连接一开关管的第一端，所述开关管的第二端接地，所述开关管的第三端连接控制单元。
优选地，所述开关管为NMOS管，所述NMOS管的漏极连接第三电阻，源极接地，栅极连接控制单元。
优选地，所述控制单元为MCU，所述计时单元为MCU上的定时器。
优选地，所述占空比控制单元为PWM驱动电路。
本发明还公开了一种激光仪器，其特征在于，包括如上所述的控制系统。
采用了上述技术方案后，与现有技术相比，其有益效果在于，利用高温条件下，激 光二级管工作电压的余量相对较大的特性，根据工作时间降低工作电压和/或占空比，从而降低了激光二级管的功耗，降低了其工作温度，在不影响发光效果的同时延长了使用寿命，降低了安全风险。
附图说明
图1为本发明一实施例中激光二极管的控制方法的流程图；
图2为本发明一实施例中激光二极管的控制系统的结构示意图；
图3为图2中的电压控制单元中的DCDC电压转换模块的示意图；
图4为图3中DCDC电压转换模块内部电路的展开视图。
图5示出了发明一实施例中与现有技术中的激光二级管的功耗与时间的关系。
具体实施方式
以下结合附图与具体实施例进一步阐述本发明的优点。
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
在本公开使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本公开。在本公开和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
应当理解，尽管在本公开可能采用术语第一、第二、第三等来描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本公开范围的情况下，第一信息也可以被称为第二信息，类似地，第二信息也可以被称为第一信息。取决于语境，如在此所使用的词语“如果”可以被解释成为“在……时”或“当……时”或“响应于确定”。
在本发明的描述中，需要理解的是，术语“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为 对本发明的限制。
在本发明的描述中，除非另有规定和限定，需要说明的是，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是机械连接或电连接，也可以是两个元件内部的连通，可以是直接相连，也可以通过中间媒介间接相连，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。
在后续的描述中，使用用于表示元件的诸如“模块”、“部件”或“单元”的后缀仅为了有利于本发明的说明，其本身并没有特定的意义。因此，“模块”与“部件”可以混合地使用。
参见附图1，本发明公开了一种激光二极管的控制方法，所述方法基于一激光二极管控制系统，参见附图2，所述控制系统包括电压控制单元、占空比控制单元、计时单元和控制单元。
所述电压控制单元与所述激光二极管连接，用于改变激光二极管的驱动电压。优选地，在本实施例中，所述电压控制单元包括DCDC电压转换模块，参见附图3、4，所述DCDC电压转换模块的VOUT端连接激光二极管；所述DCDC电压转换模块的FB端通过第一电阻R1连接VOUT端，通过第二电阻R2接地，通过第三电阻R3连接一开关管的第一端，所述开关管的第二端接地，所述开关管的第三端连接控制单元。控制单元用于向开关管发出控制信号控制开关管是否导通，当开关管不导通时，第三电阻R3这个电阻支路处于断开状态，此时的输出电压由R1和R2决定；当开关管不导通时，R3这个电阻支路处于对地导通状态，此时的输出电压由R1和R2R3的并联值决定，从而实现了电压的切换。在本实施例中，所述开关管为NMOS管，所述NMOS管的漏极连接第三电阻，源极接地，栅极连接控制单元。在其它一些实施中，本领域技术人员可以根据需要将所述NMOS管替换成PMOS管、三极管等其它开关管。
所述占空比控制单元与所述激光二极管连接，用于改变激光二极管的占空比，所述占空单元可以为PWM驱动电路。
所述计时单元用于获取激光二极管持续工作的时间，具体地，其可以从激光二极管工作后开始计时。所述控制单元，与所述电压控制单元、占空比控制单元和计时单元连接，用于根据激光二极管持续工作的时间，改变激光二极管的驱动电压和/或占空比。在本实施例中，所述控制单元为MCU，所述计时单元为MCU上的定时器。在其它一些实施例中，所述计时单元也可以为独立的计时器。
激光二极管的工作电压是有一定电压范围的，并且它的工作电压和工作温度的关系 是，温度越高，工作电压需求值低；温度越低，工作电压需求值高。本申请利用该特性，因此，在高温条件下，激光二级管工作电压的余量相对较大。本申请利用该特性，通过上述控制系统，可以在激光二极管工作一定时间后(即温度较高时)，适当降低其驱动电压和/或占空比，使其能在基本不影响发光效果的情况下，显著降低功耗。
具体地，激光二极管的控制方法包括：
以第一驱动电压和第一占空比驱动激光二级管开始工作；
获取所述激光二级管的工作时间；
当所述激光二极管的工作时间超过第一时间阈值时，以第二驱动电压和第二占空比驱动激光二级管工作，其中，所述第二驱动电压小于所述第一驱动电压，且/或，所述第二占空比小于所述第一占空比。在本步骤中，优选地，同时降低驱动电压和占空比；在一些实施例中，也可以仅降低电压或占空比中的一个参数。本实施例中，MCU通过定时器获取激光二极管的工作时间，MCU上的定时器自激光二级管工作后开始计时，当计时达到第一时间阈值时，MCU通过电压控制单元、占空比控制单元改变驱动电压和占空比，以第二驱动电压和第二占空比驱动激光二级管工作。
优选地，所述控制方法还包括：
当所述激光二极管的工作时间超过第二时间阈值时，以第三占空比驱动激光二级管工作，其中，第二时间阈值大于第一时间阈值，第三占空比小于所述第二占空比。在本步骤中，不改变电压，进一步降低占空比。
当具有上述激光二极管控制系统的仪器关机重新启动时，所述计时单元初始化。
优选地，所述第一驱动电压为7.3V～8.0V；所述第一占空比为85％～95％；所述第一时间阈值为50～70分钟；所述第二驱动电压为6.5V～7.3V；所述第二占空比为75％-85％；所述第二时间阈值为80～100分钟；所述第三占空比为65％-75％。
进一步优选地，所述第一驱动电压为7.7V；所述第一占空比为90％；所述第一时间阈值T1为60分钟；所述第二驱动电压为6.9V；所述第二占空比为80％；所述第二时间阈值T2为90分钟；所述第三占空比为70％。以上述参数控制激光二级管时，其功耗与时间的关系与现有技术(一直以第一驱动电压和第一占空比驱动激光二极管工作)的对比如图5所示。从中可以毫无疑义得看出，采用本申请的技术方案后，激光二级管的功耗显著降低。
本发明还提供了一包括上述控制系统激光仪器，所述激光仪器可以为激光准直仪、激光投线仪等。
应当注意的是，本发明的实施例有较佳的实施性，且并非对本发明作任何形式的限制，任何熟悉该领域的技术人员可能利用上述揭示的技术内容变更或修饰为等同的有效实施例，但凡未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何修改或等同变化及修饰，均仍属于本发明技术方案的范围内。

Claims (10)

  1. 一种激光二极管的控制方法，其特征在于，包括：
    以第一驱动电压和第一占空比驱动激光二级管开始工作；
    获取所述激光二级管的工作时间；
    当所述激光二极管的工作时间超过第一时间阈值时，以第二驱动电压和第二占空比驱动激光二级管工作，其中，所述第二驱动电压小于所述第一驱动电压，且/或，所述第二占空比小于所述第一占空比。
  2. 如权利要求1所述的控制方法，其特征在于，
    所述控制方法还包括：
    当所述激光二极管的工作时间超过第二时间阈值时，以第三占空比驱动激光二级管工作，其中，第二时间阈值大于第一时间阈值，第三占空比小于所述第二占空比。
  3. 如权利要求2所述的控制方法，其特征在于，
    所述第一驱动电压为7.3V～8.0V；
    所述第一占空比为85％～95％；
    所述第一时间阈值为50～70分钟；
    所述第二驱动电压为6.5V～7.3V；
    所述第二占空比为75％-85％；
    所述第二时间阈值为80～100分钟；
    所述第三占空比为65％-75％。
  4. 如权利要求2所述的控制方法，其特征在于，
    所述第一驱动电压为7.7V；
    所述第一占空比为90％；
    所述第一时间阈值为60分钟；
    所述第二驱动电压为6.9V；
    所述第二占空比为80％；
    所述第二时间阈值为90分钟；
    所述第三占空比为70％。
  5. 一种激光二极管的控制系统，其特征在于，包括
    电压控制单元，与所述激光二极管连接，用于改变激光二极管的驱动电压；
    占空比控制单元，与所述激光二极管连接，用于改变激光二极管的占空比；
    计时单元，用于获取激光二极管持续工作的时间；
    控制单元，与所述电压控制单元、占空比控制单元和计时单元连接，用于根据激光二极管持续工作的时间，改变激光二极管的驱动电压和/或占空比。
  6. 如权利要求5所述的控制系统，其特征在于，
    所述电压控制单元包括DCDC电压转换模块；
    所述DCDC电压转换模块的VOUT端连接激光二极管；
    所述DCDC电压转换模块的FB端通过第一电阻连接VOUT端，通过第二电阻接地，通过第三电阻连接一开关管的第一端，所述开关管的第二端接地，所述开关管的第三端连接控制单元。
  7. 如权利要求6所述的控制系统，其特征在于，
    所述开关管为NMOS管，所述NMOS管的漏极连接第三电阻，源极接地，栅极连接控制单元。
  8. 如权利要求5所述的控制系统，其特征在于，
    所述控制单元为MCU，所述计时单元为MCU上的定时器。
  9. 如权利要求5所述的控制系统，其特征在于，
    所述占空比控制单元为PWM驱动电路。
  10. 一种激光仪器，其特征在于，包括如权利要求5-9中任一项所述的控制系统。
PCT/CN2022/079068 2021-05-08 2022-03-03 一种激光二极管的控制方法、控制系统及激光仪器 WO2022237285A1 (zh)

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