Internal and external control switching modulation circuit of laser controller

Abstract

The utility model relates to an internal and external control switching modulation circuit of a laser controller, which comprises an MCU chip U0, a first analog switch chip U1, a pulse switching chip U2, a logic selection chip U3 and a second analog switch chip U4, and a system is controlled to select an internal control mode or an external control mode through output signals of different pins of the MCU chip U0. According to the utility model, signal switching can be seamlessly realized, internal and external control signal management can be flexibly realized, direct control of external signals in an external control mode is realized by the system through the above mechanism, and rapid switching capability of the internal and external control modes is maintained at the same time. And the output of the laser can be quickly switched on and off and the power can be quickly adjusted.

Description

Technical Field

[0001] The utility model relates to the field of laser controller circuits, and particularly to an internal and external control switching modulation circuit of a laser controller. Background Technique

[0002] A laser controller is an electronic device used to control laser equipment and is widely applied in fields such as industrial processing, medical beauty, and scientific research. It can precisely adjust and control a laser. It can achieve precise control of laser output by adjusting parameters such as the power, frequency, and mode of the laser.

[0003] When adjusting the laser mode, it can be achieved through two modes: internal control (i.e., internal control) and external control (i.e., external control). However, currently, it is difficult to achieve fast and effective switching due to unreasonable circuit design during the internal and external control switching. Therefore, it is necessary to provide an internal and external control switching modulation circuit for a laser controller, which can seamlessly achieve signal switching and very flexibly manage internal and external control signals. Content of the Utility Model

[0004] In order to achieve the above object, the utility model provides an internal and external control switching and adjustment circuit for a laser controller, including:

[0005] MCU chip U0, first analog switch chip U1, pulse switching chip U2, logic selection chip U3, and second analog switch chip U4;

[0006] The first pin of the MCU chip U0 is connected to the sixth pin of the first analog switch chip U1 via a resistor R1, the second pin of the MCU chip U0 is connected to the first pin of the pulse switching chip U2, the third pin of the MCU chip U0 is connected to the second pin of the logic selection chip U3 via a resistor R5, and the fourth pin of the MCU chip U0 is connected to the third pin of the first analog switch chip U1;

[0007] The first pin of the first analog switch chip U1 is externally connected to an analog signal input by an external control interface, the second pin of the first analog switch chip U1 is grounded, the fourth pin of the first analog switch chip U1 is connected to the first pin of the second analog switch chip U4, and the fifth pin of the first analog switch chip U1 is connected to a voltage signal V3.3D;

[0008] The second pin of the pulse switching chip U2 is connected to the PWM pulse signal of the external control input interface. The third pin of the pulse switching chip U2 is grounded. The fourth pin of the pulse switching chip U2 is connected to the voltage signal V3.3D via the resistor R2 and is connected to the first pin of the logic selection chip U3 via the resistor R3. The fifth pin of the pulse switching chip U2 is connected to the voltage signal V3.3D.

[0009] The third pin of the logic selection chip U3 is grounded. The fourth pin of the logic selection chip U3 is connected to the sixth pin of the second analog switch chip U4. The fifth pin of the logic selection chip U3 is connected to the voltage signal V3.3D.

[0010] The second and third pins of the second analog switch chip U4 are grounded. The fifth pin of the second analog switch chip U4 is connected to the voltage signal V3.3D. The fourth pin of the second analog switch chip U4 outputs a modulation output signal.

[0011] In a possible implementation, the first pin of the pulse switching chip U2 is also grounded via the resistor R4.

[0012] In a possible implementation, the model of the MCU chip U0 is STM32F103ZET6.

[0013] In a possible implementation, the model of the first analog switch chip U1 is FSA3157L6X.

[0014] In a possible implementation, the model of the pulse switching chip U2 is RS1G126XC5.

[0015] In a possible implementation, the model of the logic selection chip U3 is RS1G08XC5.

[0016] In a possible implementation, the model of the second analog switch chip U4 is FSA3157L6X.

[0017] In a possible implementation, the first pin of the MCU chip U0 outputs the MCU_AD_SELECT signal, and the MCU_AD_SELECT signal is the internal and external control AD analog signal selection signal output by the MCU. The second pin of the MCU chip U0 outputs the EXT_en signal, and the EXT_en signal is the external control enable signal output by the MCU. The third pin of the MCU chip U0 outputs the PWM_INT signal, and the PWM_INT signal is the internal control PWM pulse signal output by the internal MCU. The fourth pin of the MCU chip U0 outputs the AD_INT signal, and the AD_INT signal is the AD analog quantity signal output by the internal MCU.

[0018] In a possible implementation, the analog signal input by the external control interface is the AD_EXT signal, and the PWM pulse signal of the external control input interface is the PWM_EXT signal.

[0019] The beneficial effects of the present utility model are as follows: The output signals of different pins of the MCU chip U0 are used to control the system to select the internal control mode or the external control mode, which can seamlessly achieve signal switching and very flexibly manage the internal and external control signals. Through the above mechanism, the system realizes the direct control of external signals in the external control mode, and at the same time maintains the fast switching ability between the internal and external control modes, and can realize the fast on / off of the laser output and the fast adjustment of the power. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a circuit structure diagram of an embodiment of the internal and external control switching modulation circuit of a laser controller provided by the present utility model. Detailed Embodiments

[0022] The following will specifically describe the preferred embodiments of the present utility model with reference to the drawings. Among them, the drawings form a part of the present utility model and are used together with the embodiments of the present utility model to explain the principle of the present utility model, rather than to limit the scope of the present utility model.

[0023] The "embodiments" provided in this article mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present utility model. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0024] Please refer to Figure 1 , the present utility model provides an internal and external control switching modulation circuit for a laser controller, including:

[0025] MCU chip U0, first analog switch chip U1, pulse switching chip U2, logic selection chip U3, and second analog switch chip U4;

[0026] The first pin of the MCU chip U0 is connected to the sixth pin of the first analog switch chip U1 via a resistor R1. The second pin of the MCU chip U0 is connected to the first pin of the pulse switching chip U2. The third pin of the MCU chip U0 is connected to the second pin of the logic selection chip U3 via a resistor R5. The fourth pin of the MCU chip U0 is connected to the third pin of the first analog switch chip U1;

[0027] The first pin of the first analog switch chip U1 is externally connected to the analog signal input by the external control interface. The second pin of the first analog switch chip U1 is grounded. The fourth pin of the first analog switch chip U1 is connected to the first pin of the second analog switch chip U4. The fifth pin of the first analog switch chip U1 is connected to the voltage signal V3.3D. Among them, the first analog switch chip U1 and its periphery form an internal and external analog quantity selection circuit (see the dotted line in the figure);

[0028] The second pin of the pulse switching chip U2 is connected to the PWM pulse signal of the external control input interface. The third pin of the pulse switching chip U2 is grounded. The fourth pin of the pulse switching chip U2 is connected to the voltage signal V3.3D via a resistor R2 and is also connected to the first pin of the logic selection chip U3 via a resistor R3. The fifth pin of the pulse switching chip U2 is connected to the voltage signal V3.3D. Among them, the pulse switching chip U2 and its periphery form an internal and external PWM pulse switching circuit (see the dotted line in the figure);

[0029] The third pin of the logic selection chip U3 is grounded. The fourth pin of the logic selection chip U3 is connected to the sixth pin of the second analog switch chip U4. The fifth pin of the logic selection chip U3 is connected to the voltage signal V3.3D;

[0030] The second pin and the third pin of the second analog switch chip U4 are grounded. The fifth pin of the second analog switch chip U4 is connected to the voltage signal V3.3D. The fourth pin of the second analog switch chip U4 outputs a modulation output signal AD_OUT.

[0031] In a preferred embodiment, the first pin of the pulse switching chip U2 is also grounded via a resistor R4.

[0032] In a preferred embodiment, the model of the MCU chip U0 is STM32F103ZET6.

[0033] In a preferred embodiment, the model of the first analog switch chip U1 is FSA3157L6X.

[0034] In a preferred embodiment, the model of the pulse switching chip U2 is RS1G126XC5.

[0035] In a preferred embodiment, the model of the logic selection chip U3 is RS1G08XC5.

[0036] In a preferred embodiment, the model of the second analog switch chip U4 is FSA3157L6X.

[0037] In a preferred embodiment, the MCU chip U0 outputs the MCU_AD_SELECT signal at its pin 1. The MCU_AD_SELECT signal is the internal and external control AD analog signal selection signal output by the MCU. The MCU chip U0 outputs the EXT_en signal at its pin 2. The EXT_en signal is the external control enable signal output by the MCU. The MCU chip U0 outputs the PWM_INT signal at its pin 3. The PWM_INT signal is the internal control PWM pulse signal output by the internal MCU. The MCU chip U0 outputs the AD_INT signal at its pin 4. The AD_INT signal is the AD analog quantity signal output by the internal MCU.

[0038] In a preferred embodiment, the analog quantity signal input by the external control interface is the AD_EXT signal, and the PWM pulse signal of the external control input interface is the PWM_EXT signal.

[0039] In a specific embodiment, when the system selects the internal control mode, the working principle is as follows:

[0040] EXT_en output by the MCU is at a low level and enters pin 1 of U2. RS1G126XC5 is a logic level conversion chip, which is used here as a switching switch for the external PWM pulse signal. The output of pin 4 of U2 is always at a high level and enters pin 1 of the U3 chip. When the MCU_AD_SELECT signal output by the MCU is at a low level, it enters pin 6 of the U1 chip. U1 selects FSA3157L6X, which is used to select the analog quantity signal input to the system and can switch between the externally input analog quantity signal (AD_EXT) and the analog quantity signal (AD_INT) output by the internal main control. At this time, the AD_INT signal is selected and output to pin 1 of U4. The PWM_INT output by the MCU is connected to pin 2 of U3. U3 is a two-channel input AND gate. When pin 1 is at a high level, the waveform shown at the output of pin 4 is the PWM_INT signal waveform of pin 2. The model of U4 is FSA3157L6X, which is an analog quantity selection switch. This IC is used to select the switched analog quantity signal AD_INT and integrates the output of the switch signal AD_OUT, which is provided to the constant current source driver of the laser to control the output power of the driver.

[0041] When the system is in the external control mode, the working principle is as follows:

[0042] The MCU outputs a high level to the EXT_en signal (external control enable), which enters pin 1 of U2 (RS1G126XC5). The output of pin 4 of U2 follows the PWM pulse signal PWM_EXT of the external control input interface and enters pin 1 of U3 chip. The MCU always outputs a high level to the PWM_INT signal. The output of pin 4 of U3 follows the input of pin 1, and the output of the external PWM signal enters pin 6 of U4. The MCU outputs a high level to the MCU_AD_SELECT signal, which enters pin 6 of U1 (FSA3157L6X). U1 switches the analog signal source, selects the externally input AD_EXT signal as the output, and enters pin 1 of U4. After the previous selection and switching, the analog signal selection switch U4 (FSA3157L6X) will finally select the analog signal AD_EXT, and the output AD_OUT that integrates the switching signal enters the constant current source driver of the laser, realizing the rapid adjustment of the constant current source current power and rapid switching.

[0043] The beneficial effects of the present utility model are as follows: By controlling the system through the output signals of different pins of the MCU chip U0 to select the internal control mode or the external control mode, seamless signal switching can be achieved, and very flexible internal and external control signal management can be realized. Through the above mechanism, the system realizes the direct control of external signals in the external control mode, while maintaining the ability to quickly switch between the internal and external control modes, and can achieve the rapid switching of the laser output and the rapid adjustment of power.

[0044] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. An internal and external control switching modulation circuit for a laser controller, characterized in that, Including: MCU chip U0, first analog switch chip U1, pulse switching chip U2, logic selection chip U3, and second analog switch chip U4; The first pin of the MCU chip U0 is connected to the sixth pin of the first analog switch chip U1 via the resistor R1, the second pin of the MCU chip U0 is connected to the first pin of the pulse switching chip U2, the third pin of the MCU chip U0 is connected to the second pin of the logic selection chip U3 via the resistor R5, and the fourth pin of the MCU chip U0 is connected to the third pin of the first analog switch chip U1; The first pin of the first analog switch chip U1 is externally connected to the analog signal input by the external control interface, the second pin of the first analog switch chip U1 is grounded, the fourth pin of the first analog switch chip U1 is connected to the first pin of the second analog switch chip U4, and the fifth pin of the first analog switch chip U1 is connected to the voltage signal V3.3D; The second pin of the pulse switching chip U2 is connected to the PWM pulse signal of the external control input interface, the third pin of the pulse switching chip U2 is grounded, the fourth pin of the pulse switching chip U2 is connected to the voltage signal V3.3D via the resistor R2 and is also connected to the first pin of the logic selection chip U3 via the resistor R3, and the fifth pin of the pulse switching chip U2 is connected to the voltage signal V3.3D; The third pin of the logic selection chip U3 is grounded, the fourth pin of the logic selection chip U3 is connected to the sixth pin of the second analog switch chip U4, and the fifth pin of the logic selection chip U3 is connected to the voltage signal V3.3D; The second and third pins of the second analog switch chip U4 are grounded, the fifth pin of the second analog switch chip U4 is connected to the voltage signal V3.3D, and the fourth pin of the second analog switch chip U4 outputs a modulated output signal.

2. The internal and external control switching modulation circuit of the laser controller according to claim 1, characterized in that, The first pin of the pulse switching chip U2 is also grounded via the resistor R4.

3. The internal and external control switching modulation circuit of the laser controller according to claim 1, characterized in that, The model of the MCU chip U0 is STM32F103ZET6.

4. The internal and external control switching modulation circuit of the laser controller according to claim 1, characterized in that, The model of the first analog switch chip U1 is FSA3157L6X.

5. The internal and external control switching modulation circuit of the laser controller according to claim 1, characterized in that, The model of the pulse switching chip U2 is RS1G126XC5.

6. The internal and external control switching modulation circuit of the laser controller according to claim 1, characterized in that, The model of the logic selection chip U3 is RS1G08XC5.

7. The internal and external control switching modulation circuit of the laser controller according to claim 1, characterized in that, The model of the second analog switch chip U4 is FSA3157L6X.

8. The internal and external control switching modulation circuit of the laser controller according to claim 1, characterized in that, The first pin of the MCU chip U0 outputs the MCU_AD_SELECT signal, and the MCU_AD_SELECT signal is the internal and external control AD analog signal selection signal output by the MCU; the second pin of the MCU chip U0 outputs the EXT_en signal, and the EXT_en signal is the external control enable signal output by the MCU; the third pin of the MCU chip U0 outputs the PWM_INT signal, and the PWM_INT signal is the internal control PWM pulse signal output by the internal MCU; the fourth pin of the MCU chip U0 outputs the AD_INT signal, and the AD_INT signal is the AD analog signal output by the internal MCU.

9. The internal and external control switching modulation circuit of the laser controller according to claim 1, characterized in that The analog signal input by the external control interface is the AD_EXT signal, and the PWM pulse signal of the external control input interface is the PWM_EXT signal.

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