A light source driving signal control method and circuit

Abstract

The present application discloses a light source driving signal control method and circuit, which is used to control the input pulse signal of the laser. The present application method includes: allocating the input signal to three signal routes; directly transmitting the input signal to the driving module of the target device through the first signal route; performing signal modulation processing on the input signal through the second signal route; based on the first modulation signal, performing a first type of protection signal determination to generate a first type of protection signal; pre-processing the input signal through the third signal route to generate a fixed characteristic output signal, and performing signal modulation processing on the fixed characteristic output signal to generate a second modulation signal representing the second parameter of the signal characteristic; based on the second modulation signal, performing a second type of protection signal determination to generate a second type of protection signal; combining the first type of protection signal and the second type of protection signal to generate a comprehensive control signal; and controlling the on-off state of the driving module according to the comprehensive control signal.

Description

Technical Field

[0001] The present application relates to the field of circuit technology, and in particular to a light source driving signal control method and circuit. Background Art

[0002] With the rapid development of electronic technology and signal processing technology, various devices have an increasing demand for precise control of input signals. Especially in high-precision equipment such as lasers and communication equipment, the stability and safety of input signals are crucial to the normal operation of the equipment. In order to avoid equipment damage or performance degradation due to abnormal input signals (such as excessive pulse width, abnormal frequency, etc.), an efficient and reliable light source drive signal control method is urgently needed.

[0003] Existing methods for controlling light source drive signals usually control the signal through a single hardware module or a simple logic circuit. However, these methods have certain limitations when facing complex signal environments. For example, traditional solutions focus on the detection and control of a single signal characteristic (such as pulse width) and cannot effectively monitor and protect multiple signal characteristics at the same time. Existing methods usually rely on fixed hardware configurations when processing signal characteristics, which makes it difficult to adapt to the needs of different devices or application scenarios. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a light source driving signal control method and circuit.

[0005] A first aspect of the present application provides a light source driving signal control method, comprising:

[0006] Distribute input signals to three signal routings, wherein each signal routing is used to process the signals to generate control signals for different purposes;

[0007] Directly transmitting the input signal to a driving module of a target device through a first signal route to drive the target device to achieve functional output;

[0008] Performing signal modulation processing on the input signal through the second signal routing to generate a first modulated signal representing a first parameter of a signal characteristic;

[0009] Based on the first modulated signal, performing a first type of protection signal determination to generate a first type of protection signal;

[0010] Preprocessing the input signal through a third signal route to generate a fixed characteristic output signal, and performing signal modulation processing on the fixed characteristic output signal to generate a second modulated signal representing a second parameter of the signal characteristic;

[0011] Based on the second modulated signal, performing a second type of protection signal determination to generate a second type of protection signal;

[0012] Combining the first type protection signal and the second type protection signal to generate a comprehensive control signal;

[0013] The on / off state of the driving module is controlled according to the comprehensive control signal.

[0014] Optionally, performing signal modulation processing on the input signal through the second signal routing to generate a first modulated signal representing a first parameter of a signal characteristic includes:

[0015] The input pulse signal is transmitted to the first RC integration circuit through the second signal routing, and the input pulse signal is modulated into a first analog voltage signal through the first RC integration circuit, and the first analog voltage signal is used to characterize the average level of the pulse signal.

[0016] Optionally, preprocessing the input signal through a third signal routing to generate a fixed characteristic output signal, and performing signal modulation processing on the fixed characteristic output signal to generate a second modulated signal representing a second parameter of the signal characteristic includes:

[0017] The input pulse signal is transmitted to the fixed pulse width output module through the third signal routing, and a pulse signal with a fixed pulse width is output;

[0018] The pulse signal with a fixed pulse width is output to a second RC integration circuit, and the pulse signal is modulated into a second analog voltage signal through the second RC integration circuit, so as to characterize the frequency characteristics of the pulse signal.

[0019] Optionally, performing a first type of protection signal determination based on the first modulated signal to generate a first type of protection signal includes:

[0020] Inputting the first analog voltage signal into a preconfigured AND gate;

[0021] The AND gate is used to determine whether the first analog voltage signal exceeds a preset maximum pulse width, and the first type protection signal is generated.

[0022] Optionally, performing a second type of protection signal determination based on the second modulated signal to generate a second type of protection signal includes:

[0023] The second analog voltage signal is input into a voltage comparator and compared with a preset voltage threshold to generate the second type protection signal.

[0024] Optionally, the integrating the first type protection signal and the second type protection signal to generate a comprehensive control signal includes:

[0025] The first type protection signal and the second type protection signal are input into an OR gate, so that the OR gate generates a comprehensive protection signal.

[0026] Optionally, controlling the on / off state of the driving module according to the comprehensive control signal includes:

[0027] Inputting the integrated control signal into an analog switch, wherein the analog switch is used to control the on / off state of the driving module;

[0028] The on-off state of the analog switch is switched according to the high and low levels of the integrated control signal, wherein the driving module is disconnected when the signal is at a high level, and the driving module is turned on when the signal is at a low level.

[0029] Optionally, the fixed pulse width output module is a monostable multivibrator.

[0030] Optionally, allocating the input signal to three signal routes includes:

[0031] A pulse signal for controlling the output of the laser is divided into a first signal route, a second signal route, and a third signal route through a voltage follower.

[0032] A second aspect of the present application provides a light source driving signal control circuit, comprising:

[0033] A signal distribution module, used for distributing an input signal into a first signal route, a second signal route and a third signal route;

[0034] A first signal processing module, connected to the first signal routing, for transmitting an input signal directly to a driving module of a target device to drive a functional output of the target device;

[0035] The second signal processing module is connected to the second signal routing, and includes:

[0036] A first RC integrator circuit is used to integrate the input signal to generate a first modulated signal;

[0037] A first protection signal generating submodule, connected to the first RC integration circuit, and configured to generate a first type protection signal according to the first modulation signal and a first preset threshold;

[0038] The third signal processing module is connected to the third signal routing, and includes:

[0039] A fixed pulse width output submodule, used for receiving the input signal and outputting a pulse signal with a fixed pulse width;

[0040] A second RC integration circuit is used to integrate the pulse signal with a fixed pulse width to generate a second modulation signal;

[0041] A second protection signal generating submodule, connected to the second RC integration circuit, and configured to generate a second type of protection signal according to the second modulation signal and a second preset threshold;

[0042] a signal synthesis module, connected to the first protection signal generation submodule and the second protection signal generation submodule respectively, configured to receive the first type protection signal and the second type protection signal and generate a comprehensive control signal;

[0043] The analog switch module is connected to the signal integration module and the drive module of the target device respectively, and is used to control the on-off state of the drive module according to the integrated control signal.

[0044] It can be seen from the above technical solutions that this application has the following advantages:

[0045] 1. By modulating the first parameter and the second parameter of the input signal and determining the protection signal respectively, the method can accurately detect the abnormal characteristics of the input signal (such as excessive pulse width or inconsistent frequency), and accurately control the drive module through the comprehensive control signal, thereby avoiding failure or damage of the target device due to abnormal signal input.

[0046] 2. The input signal is divided into three signal routes through the signal distribution module. Each signal route performs different processing tasks respectively, so that the system can not only independently monitor the signal characteristics, but also comprehensively judge various protection requirements, and comprehensively improve the system's response ability to signal abnormalities.

[0047] 3. By introducing the first modulation signal and the second modulation signal, this method supports flexible setting and monitoring of different signal parameters (such as average level and frequency characteristics). At the same time, by making judgments through preset thresholds, the system can dynamically adjust the protection standard according to actual needs, thereby adapting to a variety of application scenarios.

[0048] 4. This method integrates the first type and second type protection signals into one control signal through logic optimization, avoiding complex control circuit design, reducing implementation costs, and improving signal processing efficiency and the response speed of the target device.

[0049] 5. Generate standardized signals through fixed characteristic output modules to ensure high consistency and anti-interference ability during signal modulation, so that the system can still maintain stable operation under complex signal input or noisy environment.

[0050] 6. This method is suitable for driving scenarios of various target devices such as laser driving, motor control, and communication equipment protection, providing a highly versatile and extensible solution for signal processing and equipment protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0052] Figure 1 A schematic flow chart of an embodiment of a method for controlling a light source driving signal provided in the present application;

[0053] Figure 2 A schematic flow chart of an embodiment of the light source driving signal control method provided in the present application when applied to a laser driving circuit;

[0054] Figure 3 This is a schematic diagram of the structure of an embodiment of a light source driving signal control circuit provided in this application. DETAILED DESCRIPTION

[0055] Currently, in the fields of laser driving, motor control, communication equipment protection, etc., the performance and reliability of the signal driving module are crucial to the stability of equipment operation. However, if the characteristics of the input signal (such as pulse width, frequency, etc.) are abnormal, it may cause abnormal operation of the equipment, performance degradation, or even damage. Traditional light source driving signal control methods can usually only protect a single characteristic, and it is difficult to achieve comprehensive monitoring and protection of multiple signal characteristics. In addition, the signal processing and protection circuits in the prior art are relatively complex, which can easily lead to increased costs and increased difficulty in implementation.

[0056] In order to solve the above problems, the present invention provides a method for controlling a light source driving signal, which distributes the input signal to multiple signal routes, modulates the signal characteristic parameters and determines the protection signal respectively, and generates a comprehensive control signal to control the on-off state of the driving module of the target device. This method can effectively protect the multi-dimensional characteristics of the input signal, significantly improve the operating safety and reliability of the target device, optimize the control logic, and reduce the implementation complexity and cost of the system.

[0057] The method of the present invention is applicable to various equipment scenarios requiring precise control and protection of signals, and has broad application prospects in laser driving, industrial control systems, and high-reliability communication equipment.

[0058] The following is a detailed description of an embodiment of the light source driving signal control method provided in this application:

[0059] See also Figure 1 , Figure 1 A schematic flow chart of an embodiment of a method for controlling a light source driving signal provided in the present application, the method comprising:

[0060] S101, allocating an input signal to three signal routes, wherein each signal route is used to process the signal to generate a control signal for a different purpose;

[0061] The input signal is divided into three independent signal routes through voltage followers (or other signal distribution circuits). Each signal route maintains the integrity and synchronization of the input signal during the distribution process to ensure that the characteristics of the signal (such as amplitude, frequency, and pulse width) are not affected. Signal distribution can be implemented in hardware, such as multiplexing circuits or FPGA logic units.

[0062] S102, directly transmitting the input signal to a driving module of a target device through a first signal route, so as to drive the target device to implement a functional output;

[0063] The first signal routing transmits the original input signal to the target device's drive module (such as a laser drive circuit, servo motor drive unit) without loss. After receiving the signal, the drive module controls the output behavior of the target device (such as the laser's light output, the servo motor's speed) according to the characteristics of the input signal. This routing maintains the original form of the signal and is suitable for real-time, high-speed signal transmission.

[0064] S103, performing signal modulation processing on the input signal through a second signal routing to generate a first modulation signal representing a first parameter of a signal characteristic;

[0065] The second signal routing modulates the input signal through an RC integrator circuit or other modulation circuit to generate a first modulation signal. The signal reflects the first characteristic parameter of the input signal, such as the average value of the pulse width or the DC component of the signal. The time constant of the RC integrator circuit is set according to the target characteristic parameter to ensure that the modulation result can accurately characterize the signal characteristics.

[0066] S104: Based on the first modulated signal, perform a first type of protection signal determination to generate a first type of protection signal;

[0067] This step can analyze and determine the first modulation signal through an AND gate, a comparator or a digital logic circuit. The determination logic includes comparing the first modulation signal with a set threshold range (such as whether the pulse width exceeds a safe range). If the signal exceeds the range, a first type protection signal (such as a high level signal) is generated to limit the continued operation of the driving module.

[0068] S105, preprocessing the input signal through a third signal routing to generate a fixed characteristic output signal, and performing signal modulation processing on the fixed characteristic output signal to generate a second modulated signal representing a second parameter of the signal characteristic;

[0069] The third signal routing can pre-process the input signal through a fixed pulse width output module (such as a monostable multivibrator) to generate a fixed pulse width output signal. Subsequently, the fixed pulse width signal is modulated through a second RC integrator circuit to extract the second characteristic parameter of the signal (such as frequency or duty cycle). The second modulated signal is used to reflect the overall frequency characteristics of the input signal.

[0070] S106. Based on the second modulated signal, perform a second type of protection signal determination to generate a second type of protection signal;

[0071] This step can use a voltage comparator or a digital logic circuit to analyze and determine the second modulated signal. The determination logic includes comparing the second modulated signal with a preset frequency characteristic threshold range (such as whether the frequency is too high or too low). If the signal characteristic exceeds the range, a second type of protection signal (such as a high level signal) is generated to provide frequency characteristic protection.

[0072] S107, combining the first type protection signal and the second type protection signal to generate a comprehensive control signal;

[0073] In this step, the first type of protection signal and the second type of protection signal can be logically synthesized through an OR gate. If any one of the protection signals is at a high level (indicating that the signal is abnormal), the integrated control signal output is a high level; if both protection signals are at a low level, the integrated control signal output is a low level. The integrated control signal can reflect in real time whether the signal characteristics meet the safety conditions.

[0074] S108 . Control the on / off state of the driving module according to the comprehensive control signal.

[0075] This step inputs the integrated control signal to the analog switch to control the on / off state of the target device's driver module. If the integrated control signal is at a low level, the analog switch is turned on, allowing the signal to be transmitted to the driver module, and the target device operates normally; if the integrated control signal is at a high level, the analog switch is turned off, cutting off the signal transmission and protecting the target device from abnormal signals. The analog switch can be a MOSFET or other low-power switching device.

[0076] The present application also provides an embodiment of the specific application of the light source drive signal control method, which is a specific lower-level application of the aforementioned light source drive signal control method, and is intended to be used in the drive control of the laser to achieve precise control and protection of the laser operating state. As a high-precision optical device, the stability and reliability of the drive signal of the laser directly affect its output quality. However, external interference or abnormal signals may pose a threat to the normal operation of the laser and even cause damage to the equipment. Therefore, this embodiment designs a signal processing flow dedicated to laser drive control by branching, modulating and judging the protection signal of the input pulse signal, ensuring that the laser can work safely and efficiently under various operating conditions, while improving the stability of its output performance. The embodiment is described below, and the embodiment includes:

[0077] S201, dividing a pulse signal for controlling a laser output into a first signal route, a second signal route and a third signal route through a voltage follower;

[0078] The voltage follower is a buffer circuit with low output impedance and high input impedance, which is used to ensure that there is no loading effect or signal distortion during the signal distribution process. The input pulse signal is distributed into three independent signal routes after passing through the voltage follower, and each signal maintains synchronization and original characteristics to ensure the accuracy of subsequent processing.

[0079] S202, transmitting the pulse signal to the laser driving circuit through the first signal routing, so as to directly drive the laser;

[0080] The first signal routing directly transmits the distributed pulse signal to the laser driving circuit (such as a high-frequency current driver). After receiving the signal, the driving circuit directly controls the luminous intensity and frequency of the laser according to the pulse width and frequency of the signal to achieve real-time laser output.

[0081] S203, transmitting the pulse signal to the first RC integration circuit through the second signal routing, and modulating the pulse signal into a first analog voltage signal through the first RC integration circuit, where the first analog voltage signal is used to represent an average level of the pulse signal;

[0082] The second signal routing transmits the pulse signal to the first RC integration circuit. The time constant of the RC integration circuit is set to adapt to the periodicity of the pulse signal, and the input pulse signal is converted into a first analog voltage signal by integration. The amplitude of the signal reflects the average level of the pulse signal and is used to monitor the DC characteristics or signal energy level of the input signal.

[0083] The first RC integrator circuit is composed of a resistor RRR and a capacitor C connected in series, and the capacitor is grounded. The input signal first passes through the resistor R and then forms a voltage signal on the capacitor C. Its output end is connected to a subsequent AND gate or signal processing module.

[0084] For the time constant setting in the RC integrator circuit, the time constant τ=R⋅C is set to adapt to the periodicity of the input pulse signal. In general, the time constant should meet the following conditions: τ≫Tp, where Tp is the period of the pulse signal. This can make the capacitor voltage change more smoothly, and the output signal can accurately reflect the average value of the pulse signal.

[0085] In the RC circuit, the capacitor integrates the input pulse signal. The specific process is as follows:

[0086] When the input is high, the capacitor is charged through the resistor and the voltage gradually increases.

[0087] When the input is low, the capacitor discharges through the resistor and the voltage gradually decreases.

[0088] Due to the large time constant, the capacitor voltage changes slowly, so that the fluctuation of the output signal is smoothed, thus forming an average voltage signal.

[0089] The output signal after the RC circuit processing is the first analog voltage signal, whose amplitude is equal to the average value of the input pulse signal in one cycle. The amplitude is proportional to the duty cycle and amplitude of the pulse signal, and is used to reflect the average level or energy level of the signal.

[0090] The stability of the first analog voltage signal can be used to determine whether the input signal contains bias or abnormal imbalance. By monitoring the amplitude of the first analog voltage signal, the overall energy level of the input pulse signal can be evaluated and abnormal power changes can be detected.

[0091] Through the above manner, the second signal routing and the first RC integration circuit can efficiently convert the input pulse signal into a first analog voltage signal reflecting the average level, providing a reliable basis for subsequent signal protection determination.

[0092] S204, inputting the first analog voltage signal into a preconfigured AND gate;

[0093] The first analog voltage signal is input to an AND gate, and the other input of the AND gate is connected to a preset reference voltage signal. The AND gate compares the first analog voltage signal with the reference value to determine whether the signal is within the safe operating range. If the signal exceeds the range, the AND gate outputs a low-level signal as a protection flag, otherwise it outputs a high-level signal.

[0094] In this step, the AND gate implementation logic is:

[0095] Vout=Vin1∧Vin2

[0096] Vin1: The first analog voltage signal.

[0097] Vin2: preset reference voltage signal.

[0098] When the first analog voltage signal is greater than or equal to the reference voltage signal, the AND gate outputs a high level signal (logic 1).

[0099] When the first analog voltage signal is less than the reference voltage signal, the AND gate outputs a low level signal (logic 0) as a protection flag signal.

[0100] Specifically, the first analog voltage signal is connected to an input terminal of the AND gate through an input buffer. The buffer can enhance the signal driving capability and prevent the previous RC integration circuit from being affected by the load and causing signal distortion. The AND gate can use a standard CMOS AND gate chip (such as the 74HC08 series). The input terminal needs to be connected to the first analog voltage signal and the reference voltage signal. Note that the voltage signal should match the level requirement of the AND gate.

[0101] If the first analog voltage signal is an analog signal and the AND gate requires a digital signal, a voltage comparator (op amp) can be added before the AND gate.

[0102] If both the input signal and the reference voltage signal are analog signals, they must first be converted into logic level signals through a voltage comparator and then input into the AND gate.

[0103] S205, transmitting the pulse signal to the fixed pulse width output module through the third signal routing, and outputting a pulse signal with a fixed pulse width;

[0104] The third signal routing transmits the input pulse signal to the fixed pulse width output module. This module can be a monostable multivibrator, which outputs a pulse signal with a fixed pulse width after receiving the input pulse signal. The characteristics of the fixed pulse width signal are independent of the frequency and amplitude of the input pulse signal and are used for subsequent frequency characteristic analysis.

[0105] The monostable multivibrator is a typical circuit that can output a fixed pulse width signal. Its working principle is:

[0106] When receiving a trigger pulse, the circuit enters the excited state from the stable state and outputs a pulse signal with a constant width.

[0107] The time the excited state is maintained is determined by the time constant of the circuit, and then it automatically returns to the stable state.

[0108] A monostable multivibrator can be implemented using the following circuit:

[0109] Based on 55 timer: Use NE555 chip to build a monostable trigger circuit.

[0110] Transistor-based: Uses discrete components (e.g. transistors, resistors, capacitors) to achieve monostable behavior.

[0111] S206, outputting the pulse signal with a fixed pulse width to a second RC integration circuit, and modulating the pulse signal into a second analog voltage signal through the second RC integration circuit, so as to characterize the frequency characteristics of the pulse signal;

[0112] The pulse signal of fixed pulse width is input to the second RC integration circuit. The time constant of the RC integration circuit is designed to match the fixed pulse width signal, and the pulse signal is converted into a second analog voltage signal by integration. The amplitude of the analog signal is proportional to the frequency of the input signal, and is used to characterize the frequency characteristics of the input pulse signal.

[0113] The specific implementation method of this step can refer to step S203 and will not be repeated here.

[0114] S207, inputting the second analog voltage signal into a voltage comparator for comparison;

[0115] The second analog voltage signal is input to the voltage comparator and compared with the preset frequency characteristic threshold. The comparator determines whether the signal is within the allowed frequency range. If the signal frequency exceeds the set range, the comparator outputs a low-level signal as a frequency protection flag, otherwise it outputs a high-level signal.

[0116] In this step, the second analog voltage signal is generated by the preceding RC integration circuit, and represents the frequency characteristics of the input pulse signal (eg, the frequency is proportional to the voltage amplitude).

[0117] The voltage comparator is used to compare the second analog voltage signal with a preset frequency characteristic threshold:

[0118] If the signal is lower than the minimum threshold or higher than the maximum threshold, the output is low (frequency exceeds the limit).

[0119] If the signal is within the threshold range, the output is high (normal frequency).

[0120] S208, inputting the level signals output by the voltage comparator and the AND gate into the OR gate respectively;

[0121] The level signals output by the AND gate and the voltage comparator (respectively representing the protection status of the level characteristics and frequency characteristics) are input into the OR gate. The OR gate logically integrates the two protection signals. If any one of them detects an abnormal signal, it outputs a high-level integrated protection signal; otherwise, it outputs a low-level signal.

[0122] In this step, the level signals output by the voltage comparator and the AND gate are input into an OR gate to logically combine the two protection signals, so that a high level signal can be output as a comprehensive protection flag when any one of the signals detects an abnormality.

[0123] The first type of protection signal output by the voltage comparator: indicates whether the frequency characteristic is abnormal. If the frequency exceeds the set range, a low level signal is output; if the frequency is normal, a high level signal is output.

[0124] The AND gate outputs the second type of protection signal: indicating whether the level characteristic is abnormal. If the level signal is within the safe range, the AND gate outputs a high level signal; if the level signal exceeds the safe range, the AND gate outputs a low level signal.

[0125] The level signal output by the voltage comparator and the level signal output by the AND gate are input into the OR gate. The OR gate combines the two signals. If any one of the signals is at a low level (abnormal state), it outputs a high-level comprehensive protection signal; otherwise, it outputs a low-level signal, indicating that there is no abnormality.

[0126] S209, inputting the level signal output by the OR gate into an analog switch for controlling the on / off of the laser driving circuit, so that the analog switch is turned on or off.

[0127] The comprehensive protection signal of the OR gate controls the on-off state of the analog switch. If the protection signal is low, the analog switch is turned on and the laser drive circuit works normally; if the protection signal is high, the analog switch is turned off, cutting off the laser drive signal to prevent abnormal signals from damaging the laser. The analog switch can be implemented using high-efficiency and low-power devices such as MOSFET.

[0128] MOSFET (field effect transistor) can be used in analog switches due to its fast response, low power consumption, low on-resistance and other characteristics. When the integrated protection signal is low, the MOSFET is in the on state, the laser drive signal can be transmitted to the laser drive circuit through the MOSFET, and the laser works normally. When the integrated protection signal is high, the MOSFET is in the off state, the laser drive signal is cut off, and the laser stops working to prevent abnormal signals from damaging the laser.

[0129] Optionally, MOSFET includes N-channel MOSFET (such as IRLZ44N) and P-channel MOSFET (such as IRF9540)

[0130] In this step, by controlling the on and off states of the MOSFET and combining it with the comprehensive protection signal, efficient and safe control of the laser drive circuit can be achieved. This design has a good response speed and can respond to abnormal input signals in a timely manner, preventing abnormal signals from damaging the laser and ensuring the stability and reliability of the system.

[0131] See also Figure 3 The present application also provides an embodiment of a light source driving signal control circuit, which includes:

[0132] A signal distribution module 301, configured to distribute an input signal into a first signal route, a second signal route, and a third signal route;

[0133] A first signal processing module 302, connected to the first signal routing, for transmitting the input signal directly to the driving module of the target device to drive the functional output of the target device;

[0134] The second signal processing module 303, connected to the second signal routing, comprises:

[0135] A first RC integration circuit 3031 is used to integrate the input signal to generate a first modulated signal;

[0136] A first protection signal generating submodule 3032, connected to the first RC integration circuit, and configured to generate a first type of protection signal according to the first modulation signal and a first preset threshold;

[0137] The third signal processing module 304, connected to the third signal routing, comprises:

[0138] A fixed pulse width output submodule 3041, used for receiving the input signal and outputting a pulse signal with a fixed pulse width;

[0139] A second RC integration circuit 3042 is used to integrate the pulse signal with a fixed pulse width to generate a second modulation signal;

[0140] A second protection signal generating submodule 3043, connected to the second RC integration circuit, and configured to generate a second type of protection signal according to the second modulation signal and a second preset threshold;

[0141] A signal integration module 305, connected to the first protection signal generation submodule and the second protection signal generation submodule respectively, for receiving the first type protection signal and the second type protection signal, and generating a comprehensive control signal;

[0142] The analog switch module 306 is connected to the signal integration module and the driving module of the target device respectively, and is used to control the on-off state of the driving module according to the integrated control signal.

[0143] The structure of the light source driving signal control circuit provided by this embodiment is described in detail below:

[0144] Signal distribution module 301:

[0145] The signal distribution module is the front end of the circuit, which is used to distribute the input signal to different signal routes and pass it to different signal processing modules respectively.

[0146] The signal distribution module first receives an external input signal, which can be various types of control signals (such as pulse signals, analog signals, etc.). As needed, the input signal is distributed into three independent signal routes:

[0147] First signal routing: transmitting the signal to the first signal processing module 302 .

[0148] Second signal routing: transmitting the signal to the second signal processing module 303 .

[0149] Third signal routing: transmitting the signal to the third signal processing module 304 .

[0150] Specifically, the signal distribution module can be implemented by a voltage follower.

[0151] First signal processing module 302:

[0152] The first signal processing module directly processes the input signal transmitted through the first signal route, and is mainly used to directly transmit the signal to the driving module of the target device.

[0153] The first signal processing module transmits the input signal to the driver module of the target device to drive the function output of the target device. This signal transmission does not need to be processed too much and directly affects the working state of the target device. The first signal processing module is connected to the first signal routing to receive the signal. The output signal is sent to the driver module of the target device.

[0154] The second signal processing module 303:

[0155] This module receives the input signal through the second signal routing and includes two submodules:

[0156] A first RC integration circuit 3031;

[0157] First protection signal generating submodule 3032;

[0158] The first RC integration circuit 3031 integrates the input signal. The working principle of the first RC integration circuit is to integrate the input signal through a capacitor, and the amplitude of the output signal represents the average level of the input signal. The integrated signal is used to characterize the DC characteristics of the input signal or the energy level of the signal. The time constant (RC) of the RC circuit can be selected according to the frequency characteristics of the signal.

[0159] The first protection signal generating submodule 3032 generates a first type of protection signal by comparing the first modulation signal generated by the first RC integration circuit with a preset threshold.

[0160] If the amplitude of the signal exceeds a preset safety threshold, it indicates that the input signal is abnormal, and the first type protection signal is output as a low-level signal for protection.

[0161] If the signal is within the normal range, the first type protection signal outputs a high level, indicating that the signal state is normal. The first type protection signal is used to indicate whether the signal exceeds the safety range.

[0162] The third signal processing module 304:

[0163] The module receives input signals through the third signal routing and may include the following submodules:

[0164] Fixed pulse width output submodule 3041;

[0165] A second RC integration circuit 3042;

[0166] Second protection signal generating submodule 3043;

[0167] The fixed pulse width output submodule 3041 is used to receive an input pulse signal and convert it into a pulse signal with a fixed pulse width. The width of the pulse signal is not affected by the frequency and amplitude of the input signal, so a stable signal output can be provided for subsequent frequency characteristic analysis. This submodule can use a monostable multivibrator or other timing circuit to achieve the fixation of the pulse width.

[0168] The second RC integration circuit 3042 is used to integrate the pulse signal generated by the fixed pulse width output submodule to generate a second modulation signal. The integrated signal can reflect the frequency characteristics of the pulse signal and is used to determine the stability or abnormality of the signal.

[0169] The second protection signal generating submodule 3043 is used to generate a second type protection signal by comparing the second modulation signal generated by the second RC integration circuit with a second preset threshold.

[0170] If the frequency exceeds the set range, the second protection signal outputs a low level; otherwise, it outputs a high level.

[0171] Signal synthesis module 305:

[0172] The module receives output signals from the first protection signal generation submodule and the second protection signal generation submodule, and generates a comprehensive control signal, which is used to perform logic synthesis on the first type protection signal and the second type protection signal to determine whether the signal is abnormal.

[0173] Specifically, a logic OR gate can be used to synthesize the two protection signals:

[0174] If the protection signal of either side is at a low level (indicating an abnormality), a high-level comprehensive control signal is output, indicating that the protection mode needs to be entered.

[0175] If both protection signals are high level, a low level integrated control signal is output, indicating that the system is in normal state. The output integrated control signal is used to control the subsequent analog switch module to ensure that the equipment is in a safe working state.

[0176] Analog switch module 306:

[0177] The analog switch module controls the on / off state of the target device's driver module according to the integrated control signal. If the integrated control signal is low (normal system), the analog switch is turned on, allowing the signal to be transmitted to the target device's driver module, driving the device to work normally. If the integrated control signal is high (abnormal protection), the analog switch is turned off, cutting off signal transmission to prevent the device from being damaged due to abnormal signal operation.

[0178] Specifically, the analog switch module can be implemented by an efficient switch element (such as MOSFET), and the on or off state is determined by the gate control voltage.

[0179] The light source drive signal control circuit monitors and analyzes the input signal in real time through multi-level signal processing and protection mechanisms, generates protection signals and performs comprehensive processing, and finally controls the normal working or protection state of the target device through the analog switch module. The design can effectively prevent failures or damage caused by abnormal signals through integrated signal routing, processing modules and protection mechanisms.

[0180] The light source driving signal control circuit provided in this application has strong versatility and can be widely used in scenarios requiring precise signal processing and protection, especially in fields requiring high precision and high safety. The following are several possible application scenarios:

[0181] 1. Laser drive circuit

[0182] Lasers are widely used in many fields (such as laser cutting, laser scanning, laser marking, medical treatment, etc.), and they require precise control and protection measures. In the laser driving circuit, the stability of current and voltage directly affects the performance and life of the laser. Therefore, the use of the light source drive signal control circuit can ensure that the laser operates within the normal working range and prevent damage to the laser due to signal abnormality.

[0183] 2. Industrial Automation System

[0184] In industrial production, many devices (such as robotic arms, power tools, conveyor belts, etc.) rely on precise signal control and protection. This circuit can be used for the drive control of these devices to ensure that the equipment operates in a stable and reliable state and prevent equipment damage or production accidents caused by abnormal signals (such as current overload, voltage fluctuation, etc.).

[0185] 3. Wireless communication system

[0186] In wireless communication systems, the quality of the signal (such as amplitude and frequency stability) is critical to the quality of communication. Signal processing and protection circuits can be used in the driving circuits of these communication devices to ensure that the signal quality is always within the set range.

[0187] This application does not limit the specific application scenarios.

[0188] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0189] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0190] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0191] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0192] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), disk or optical disk and other media that can store program code.

Claims

1. A method for controlling a light source driving signal, characterized in that: The method comprises: Distribute input signals to three signal routings, wherein each signal routing is used to process the signals to generate control signals for different purposes; Directly transmitting the input signal to a driving module of a target device through a first signal route to drive the target device to achieve functional output; Performing signal modulation processing on the input signal through the second signal routing to generate a first modulated signal representing a first parameter of a signal characteristic; Based on the first modulated signal, performing a first type of protection signal determination to generate a first type of protection signal; Preprocessing the input signal through a third signal routing to generate a fixed characteristic output signal, and performing signal modulation processing on the fixed characteristic output signal to generate a second modulated signal representing a second parameter of the signal characteristic; Based on the second modulated signal, performing a second type of protection signal determination to generate a second type of protection signal; Combining the first type protection signal and the second type protection signal to generate a comprehensive control signal; The on / off state of the driving module is controlled according to the comprehensive control signal.

2. The light source driving signal control method according to claim 1, characterized in that: The performing signal modulation processing on the input signal through the second signal routing to generate a first modulated signal representing a first parameter of a signal characteristic comprises: The input pulse signal is transmitted to the first RC integration circuit through the second signal routing, and the input pulse signal is modulated into a first analog voltage signal through the first RC integration circuit, and the first analog voltage signal is used to characterize the average level of the pulse signal.

3. The light source driving signal control method according to claim 1, characterized in that: Preprocessing the input signal through the third signal routing to generate a fixed characteristic output signal, and performing signal modulation processing on the fixed characteristic output signal to generate a second modulated signal representing a second parameter of the signal characteristic includes: The input pulse signal is transmitted to the fixed pulse width output module through the third signal routing, and a pulse signal with a fixed pulse width is output; The pulse signal with a fixed pulse width is output to a second RC integration circuit, and the pulse signal is modulated into a second analog voltage signal through the second RC integration circuit, so as to characterize the frequency characteristics of the pulse signal.

4. The light source driving signal control method according to claim 2, characterized in that: The performing a first type of protection signal determination based on the first modulated signal to generate a first type of protection signal comprises: Inputting the first analog voltage signal into a preconfigured AND gate; The AND gate is used to determine whether the first analog voltage signal exceeds a preset maximum pulse width, and the first type protection signal is generated.

5. The light source driving signal control method according to claim 3, characterized in that: The performing a second type of protection signal determination based on the second modulation signal to generate a second type of protection signal comprises: The second analog voltage signal is input into a voltage comparator and compared with a preset voltage threshold to generate the second type protection signal.

6. The light source driving signal control method according to claim 1, characterized in that: The step of integrating the first type protection signal and the second type protection signal to generate a comprehensive control signal comprises: The first type protection signal and the second type protection signal are input into an OR gate, so that the OR gate generates a comprehensive protection signal.

7. The light source driving signal control method according to claim 1, characterized in that: Controlling the on / off state of the driving module according to the comprehensive control signal includes: Inputting the integrated control signal into an analog switch, wherein the analog switch is used to control the on / off state of the driving module; The on-off state of the analog switch is switched according to the high and low levels of the integrated control signal, wherein the driving module is disconnected when the signal is at a high level, and the driving module is turned on when the signal is at a low level.

8. The light source driving signal control method according to claim 3, characterized in that: The fixed pulse width output module is a monostable multivibrator.

9. The light source driving signal control method according to any one of claims 1 to 8, characterized in that: The distributing the input signal to three signal routes comprises: A pulse signal for controlling the output of the laser is divided into a first signal route, a second signal route, and a third signal route through a voltage follower.

10. A light source driving signal control circuit, characterized in that: include: A signal distribution module, used for distributing an input signal into a first signal route, a second signal route and a third signal route; A first signal processing module, connected to the first signal routing, for transmitting an input signal directly to a driving module of a target device to drive a functional output of the target device; The second signal processing module is connected to the second signal routing, and includes: A first RC integrator circuit is used to integrate the input signal to generate a first modulated signal; A first protection signal generating submodule, connected to the first RC integration circuit, and configured to generate a first type protection signal according to the first modulation signal and a first preset threshold; The third signal processing module is connected to the third signal routing, and includes: A fixed pulse width output submodule, used for receiving the input signal and outputting a pulse signal with a fixed pulse width; A second RC integration circuit is used to integrate the pulse signal with a fixed pulse width to generate a second modulation signal; A second protection signal generating submodule, connected to the second RC integration circuit, and configured to generate a second type of protection signal according to the second modulation signal and a second preset threshold; a signal synthesis module, connected to the first protection signal generation submodule and the second protection signal generation submodule respectively, configured to receive the first type protection signal and the second type protection signal and generate a comprehensive control signal; The analog switch module is connected to the signal integration module and the drive module of the target device respectively, and is used to control the on-off state of the drive module according to the integrated control signal.

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