阅读说明：本技术 一种自适应激光器前向电压的低功耗apc控制电路与方法 (Low-power-consumption APC control circuit and method for adaptive laser forward voltage ) 是由 刘陈琼 彭奇 杨洪 田永猛 王代鹏 孙朝元 于 2020-05-22 设计创作，主要内容包括：本发明涉及一种自适应激光器前向电压的低功耗APC控制电路与方法,包括：直流电源电路,为激光器件输出初始前向电压；激光器件,接收直流电源电路输出的初始前向电压,并将自身的工作状态反馈至电压环控制器；电压环控制器,根据激光器件反馈的工作状态,调节直流电源电路对激光器件输出的电压,使得激光器件工作在临界锁定状态。本发明在原有的直流电源电路为激光器件供电的基础上,加入了电压环控制器,接收PD受光器反馈的激光器的工作状态,再结合激光器的参数特性,分析调节直流电源电路对激光器输出的电压,使得激光器工作在临界锁定状态,通过对激光器件的APC控制,达到激光器低功耗工作的目的。(The invention relates to a low-power consumption APC control circuit and method of a forward voltage of a self-adaptive laser, comprising the following steps: the direct current power supply circuit outputs initial forward voltage for the laser device; the laser device receives the initial forward voltage output by the direct current power supply circuit and feeds back the working state of the laser device to the voltage loop controller; and the voltage loop controller is used for adjusting the voltage output by the direct current power supply circuit to the laser device according to the working state fed back by the laser device so that the laser device works in a critical locking state. The invention adds a voltage loop controller on the basis that the original direct current power supply circuit supplies power to the laser device, receives the working state of the laser fed back by the PD light receiver, analyzes and adjusts the voltage output by the direct current power supply circuit to the laser device by combining the parameter characteristic of the laser device, so that the laser device works in a critical locking state, and achieves the aim of low-power-consumption working of the laser device by APC control of the laser device.)

1. A low-power consumption APC control circuit of the forward voltage of the adaptive laser, characterized by that: the method comprises the following steps:

the direct current power supply circuit outputs initial forward voltage for the laser device;

the laser device receives the initial forward voltage output by the direct current power supply circuit and feeds back the working state of the laser device to the voltage loop controller;

and the voltage loop controller is used for adjusting the voltage output by the direct current power supply circuit to the laser device according to the working state fed back by the laser device so that the laser device works in a critical locking state.

2. The APC control circuit with low power consumption for adaptive laser forward voltage according to claim 1, wherein: the laser device comprises an LD laser and a PD light receiver for sensing the LD laser, the PD light receiver is connected with the voltage loop controller, the PD light receiver senses the working state of the LD laser and converts the working state of the LD laser into a voltage signal which is fed back to the voltage loop controller.

3. The APC control circuit with low power consumption for adaptive laser forward voltage according to claim 2, wherein: the voltage loop controller is a single chip microcomputer with an ADC (analog to digital converter) conversion module and a DAC (digital to analog converter) conversion module, the PD light receiver is connected with the single chip microcomputer through the ADC conversion module, and the single chip microcomputer is connected with the direct-current power supply circuit through the DAC conversion module.

4. The APC control circuit with low power consumption for adaptive laser forward voltage according to claim 2, wherein: the direct current power supply circuit comprises a power supply chip and an inductor L1, wherein the output end of the power supply chip outputs initial voltage to the LD laser through the inductor L1.

5. The APC control circuit with low power consumption for adaptive laser forward voltage according to claim 3, wherein: the low-power consumption APC control circuit of the forward voltage of the adaptive laser further comprises a resistor R3, and a DAC conversion module of the single chip microcomputer is connected with the power supply chip through a resistor R3.

6. A low-power consumption APC control method of the forward voltage of the adaptive laser, characterized by that: the method comprises the following steps:

the laser device feeds back the working state of the laser device to the voltage loop controller;

and the voltage loop controller adjusts the voltage output by the direct current power supply circuit to the laser device according to the working state fed back by the laser device, so that the laser device works in a critical locking state.

7. The APC control method with low power consumption for the forward voltage of the adaptive laser according to claim 6, characterized in that: before the laser device feeds back the working state of the laser device to the voltage loop controller, the method further comprises the following steps:

the direct current power supply circuit outputs initial forward voltage to the laser device to supply power to the laser device.

8. The APC control method with low power consumption for the forward voltage of the adaptive laser according to claim 6, characterized in that: the step of the laser device feeding back the working state of the laser device to the voltage loop controller comprises the following steps:

an LD laser in the laser device receives initial forward voltage output by the direct current power supply circuit, a PD light receiver senses the working state of the LD laser, converts the working state of the LD laser into a voltage signal, and the voltage signal is fed back to the single chip microcomputer through the ADC conversion module.

9. The method of claim 8, wherein the method comprises the following steps: the voltage loop controller adjusts the voltage output by the direct current power supply circuit to the laser device according to the working state fed back by the laser device, so that the laser device works in a critical locking state, and the method comprises the following steps:

the singlechip of the voltage loop controller adjusts the DAC signal output to the power supply chip according to the voltage signal of the LD laser fed back by the PD light receiver by combining the parameter characteristics of the LD laser, so that the power supply chip adjusts the voltage output to the LD laser, and the LD laser works in a critical locking state.

10. The method for low-power APC control of adaptive laser forward voltage according to claim 9, characterized in that: the step of adjusting the DAC signal output to the power supply chip so that the power supply chip adjusts the voltage output to the LD laser includes:

if the single chip microcomputer detects that the voltage signal fed back by the PD light receiver is lower than the voltage required by the LD laser to work in the critical locking state, the single chip microcomputer reduces the DAC signal output to the power supply chip through the DAC conversion module, so that the power supply chip increases the voltage output to the LD laser, and the LD laser works in the locking state;

if the single chip microcomputer detects that the voltage signal fed back by the PD light receiver is higher than the voltage required by the LD laser to work in the critical locking state, the single chip microcomputer increases the DAC signal output to the power supply chip through the DAC conversion module, so that the power supply chip reduces the voltage output to the LD laser, and the LD laser works in the locking state.

Technical Field

The invention relates to the technical field of APC control, in particular to a low-power-consumption APC control circuit and method for self-adaptive laser forward voltage.

Background

As shown in fig. 2, in the conventional power supply method for a laser, a fixed dc initial voltage is directly output to the laser to operate the laser, but the laser itself may not need to use such a high voltage, which results in a waste of electric energy.

Disclosure of Invention

The present invention is directed to overcoming the deficiencies in the prior art and providing a low power consumption APC control circuit and method for adaptive laser forward voltage.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

a low power APC control circuit of adaptive laser forward voltage, comprising:

the direct current power supply circuit outputs initial forward voltage for the laser device;

the laser device receives the initial forward voltage output by the direct current power supply circuit and feeds back the working state of the laser device to the voltage loop controller;

and the voltage loop controller is used for adjusting the voltage output by the direct current power supply circuit to the laser device according to the working state fed back by the laser device so that the laser device works in a critical locking state.

The voltage loop controller is used for adjusting the voltage output by the direct current power supply circuit to the laser device according to the voltage signal fed back by the laser device and by combining the parameter characteristics of the laser device, a large number of hardware circuit feedback modes are eliminated, the voltage loop controller is used for calculating an adjusting strategy and performing software control, the circuit connection mode is simple, the size is small, the control precision is high, the working power required by the laser device can be adjusted in real time according to different parameter characteristics of the laser device, and therefore the purpose of low power consumption is achieved.

Furthermore, to explain the structure of the laser device in more detail, the laser device includes an LD laser and a PD light receiver for sensing the LD laser, the PD light receiver is connected to the voltage loop controller, and the PD light receiver senses the operating state of the LD laser and converts the operating state of the LD laser into a voltage signal to be fed back to the voltage loop controller.

The scheme adopts the PD light receiver to complete the collection and feedback of the working state of the LD laser, the collection precision is high, and the principle mode is simple.

Furthermore, to explain the structure of the voltage loop controller in more detail, the voltage loop controller is a single chip microcomputer with an ADC conversion module and a DAC conversion module, the PD light receiver is connected to the single chip microcomputer through the ADC conversion module, and the single chip microcomputer is connected to the dc power circuit through the DAC conversion module.

According to the scheme, the PID algorithm is integrated in the single chip microcomputer, the DAC signal output to the direct-current power supply circuit can be calculated through the PID algorithm according to the voltage signal fed back by the PD light receiver and the parameter characteristics of the LD laser, a complicated hardware circuit is removed, and the working power required by the LD laser is adjusted in real time through software control.

Further, to explain the configuration of the dc power supply circuit in more detail, the dc power supply circuit includes a power supply chip, an inductor L1, and an output terminal of the power supply chip outputs an initial voltage to the LD laser through an inductor L1.

Furthermore, the low-power consumption APC control circuit of the adaptive laser forward voltage further comprises a resistor R3, and the DAC conversion module of the single chip microcomputer is connected with the power supply chip through a resistor R3.

A low-power-consumption APC control method of the forward voltage of an adaptive laser comprises the following steps:

the laser device feeds back the working state of the laser device to the voltage loop controller;

and the voltage loop controller adjusts the voltage output by the direct current power supply circuit to the laser device according to the working state fed back by the laser device, so that the laser device works in a critical locking state.

Further, in order to further improve the process of the APC control method, before the laser device feeds back its own operating state to the voltage loop controller, the method further includes the steps of: the direct current power supply circuit outputs initial forward voltage to the laser device to supply power to the laser device.

Further, the step of feeding back the working state of the laser device to the voltage loop controller includes:

an LD laser in the laser device receives initial forward voltage output by the direct current power supply circuit, a PD light receiver senses the working state of the LD laser, converts the working state of the LD laser into a voltage signal, and the voltage signal is fed back to the single chip microcomputer through the ADC conversion module.

Furthermore, the step of adjusting the voltage output by the dc power circuit to the laser device according to the working state fed back by the laser device by the voltage loop controller so that the laser device works in the critical locking state includes:

the singlechip of the voltage loop controller adjusts the DAC signal output to the power supply chip according to the voltage signal of the LD laser fed back by the PD light receiver by combining the parameter characteristics of the LD laser, so that the power supply chip adjusts the voltage output to the LD laser, and the LD laser works in a critical locking state.

Further, the step of adjusting the DAC signal output to the power supply chip so that the power supply chip adjusts the voltage output to the LD laser includes:

if the single chip microcomputer detects that the voltage signal fed back by the PD light receiver is lower than the voltage required by the LD laser to work in the critical locking state, the single chip microcomputer reduces the DAC signal output to the power supply chip through the DAC conversion module, so that the power supply chip increases the voltage output to the LD laser, and the LD laser works in the locking state;

if the single chip microcomputer detects that the voltage signal fed back by the PD light receiver is higher than the voltage required by the LD laser to work in the critical locking state, the single chip microcomputer increases the DAC signal output to the power supply chip through the DAC conversion module, so that the power supply chip reduces the voltage output to the LD laser, and the LD laser works in the locking state.

Compared with the prior art, the invention has the beneficial effects that:

the invention adds a voltage loop controller on the basis that the original direct current power supply circuit supplies power to the laser device, receives the working state of the laser fed back by the PD light receiver, analyzes and adjusts the voltage output by the direct current power supply circuit to the laser device by combining the parameter characteristic of the laser device, so that the laser device works in a critical locking state, and achieves the aim of low-power-consumption working of the laser device by APC control of the laser device.

The voltage loop controller is used for adjusting the voltage output by the direct current power supply circuit to the laser device according to the voltage signal fed back by the laser device and by combining the parameter characteristics of the laser device, a large number of hardware circuit feedback modes are eliminated, the voltage loop controller is used for calculating an adjusting strategy and performing software control, the circuit connection mode is simple, the size is small, the control precision is high, the working power required by the laser device can be adjusted in real time according to different parameter characteristics of the laser device, and therefore the purpose of low power consumption is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of an APC control circuit according to the present invention;

fig. 2 is a schematic diagram of a prior art laser power supply circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Also, in the description of the present invention, the terms "first", "second", and the like are used for distinguishing between descriptions and not necessarily for describing a relative importance or implying any actual relationship or order between such entities or operations.