Laser adjustment method, device and system

Abstract

The present invention relates to the field of laser lighting, and in particular to a laser adjustment method, device and system. The laser lighting adjustment method issues different control instructions to adjust the laser module according to the level of the laser light signal, including a first control instruction, a second control instruction, a third control instruction and a fourth control instruction; the first control instruction is used to turn off the laser module, or to control the power of the laser module to be reduced to below Q0; the second control instruction is used to continuously reduce the power of the laser module; the third control instruction is used to maintain the current power of the laser module; the fourth control instruction is used to immediately turn off the laser module, or to control the power of the laser module to be reduced to below Q0. The present invention can accurately distinguish abnormal situations, and take rapid and effective response measures for abnormal situations of different degrees and types, so as to maintain the safe operation of the laser module to the greatest extent and improve the safety and stability of the laser lighting module.

Description

Technical Field

[0001] The present invention relates to the field of laser lighting, and more specifically, to a laser adjustment method, device and system. Background Art

[0002] In the existing laser lighting solutions, part of the laser light source in the laser module is converted into stimulated laser light through the wavelength converter device, and the stimulated laser light and the unconverted laser light are mixed to form an outgoing light beam with a wavelength band that adapts to the lighting characteristics. However, the energy density of the laser light source is relatively high, which has a certain impact on the safety and reliability of the laser module: after the laser module has been running for a period of time, the internal temperature gradually rises, the conversion performance of the wavelength converter tends to decrease, and the laser intensity in the outgoing light gradually increases, which poses a risk of laser leakage. If the temperature is too high, the wavelength converter device may be burned and other components inside the module may be damaged.

[0003] In view of this, there are two control schemes in this field: the first is to conduct real-time monitoring during the operation of the laser module, and shut down the laser module if the operating temperature of the laser module is too high or the local temperature of the wavelength conversion device is too high. This scheme sacrifices the operability of the laser module to obtain a high safety factor; the second is to collect the operating temperature inside the module and dynamically control the power of the laser module accordingly to reduce the possibility of abnormal conditions in the laser module. Since the actual operating conditions are relatively complex and there are many factors that give rise to abnormal conditions, this scheme fails to effectively avoid abnormal conditions in the laser module. At the same time, when the laser module is operating normally, the emitted light continues to change in brightness, affecting the user experience. At present, there is an urgent need for a laser control scheme that combines operability, safety, and stability. Summary of the invention

[0004] The present invention provides a laser adjustment method, device and system for improving the safety and stability of a laser module.

[0005] The technical solution adopted by the present invention includes: a laser adjustment method for adjusting a laser module of an outgoing light, including a measuring step and an adjustment step:

[0006] Measuring step: measuring the laser light signal A0 in the light emitted by the laser module at rated power, or the laser light signal A0 and the stimulated light light signal B0, to obtain the minimum light signal A1 and the maximum light signal A2 of the laser at rated power, or to obtain the minimum value C1 and the maximum value C2 of the ratio of the laser light signal A0 to the stimulated light light signal B0 at rated power;

[0007] Adjustment steps: receiving the laser illumination signal A of the emitted light, or the laser illumination signal A and the stimulated laser illumination signal B; when the laser illumination signal A satisfies A>xA2, or the ratio C of the laser illumination signal A and the stimulated laser illumination signal B satisfies: C>yC2, it is determined that the laser module is damaged, and a first control instruction is issued: turning off the laser module, or controlling the power of the laser module to be reduced to below Q0; when the laser illumination signal A satisfies: A2≤A≤xA2, or the ratio C of the laser illumination signal A and the stimulated laser illumination signal B satisfies: When C2<C<yC2 is satisfied, it is determined that the laser module has an abnormal situation, and a second control instruction is issued: continuously reduce the power of the laser module; when the laser illumination signal satisfies A1≤A≤A2 after the second control instruction is issued, or the ratio C of the laser illumination signal A and the stimulated laser illumination signal B satisfies C1<C<C2, it is determined that the abnormal situation is fluorescence quenching, and a third control instruction is issued: maintain the current power of the laser module; when the output power of the laser module is less than Q after the second control instruction is issued 设 , and when any one of the following conditions is met: the laser illumination signal A>A2 and the ratio of the laser illumination signal A to the stimulated laser illumination signal B C>C2, the abnormal situation is determined to be a potential safety hazard, and a fourth control instruction is issued: immediately shut down the laser module, or control the power of the laser module to be reduced to below Q0; wherein x, y are set parameter values; Q0 is the power of the laser module at the threshold current; Q 设 The power is a preset power and is not lower than the lower limit of the operating power of the laser module.

[0008] The laser illumination signal A and the ratio C of the laser and stimulated laser illumination signals can be used as the basis for judging the abnormal situation of the laser module. Either one of them can be received. When C is selected, the laser illumination signal and the stimulated laser illumination signal need to be received at the same time.

[0009] Abnormal conditions include: 1) Fluorescence quenching, long operation time or high ambient temperature, which leads to excessively high local temperature of the phosphor layer and low efficiency of overall conversion to stimulated light; 2) Safety hazards, including local rupture of the phosphor layer, burning of the phosphor layer or detachment of the entire phosphor layer, etc., the laser module is completely damaged, and the damage to the laser module is harmful. The difference between the two abnormal conditions is whether the phosphor layer can be restored to normal conversion efficiency.

[0010] The characteristics of the laser module can be effectively determined by determining the minimum illumination signal A1 and the maximum illumination signal A2 according to A0, or by determining the minimum value C1 and the maximum value C2 through A0 and B0.

[0011] x and y are set parameter values ​​not less than 1, which are used to warn against the situation where the laser light signal of the emitted light greatly exceeds the normal use range. In this case, the safety risk is high. Regardless of whether the abnormal situation is fluorescence quenching or there is a safety hazard, there is not enough adjustment time. When the laser light signal exceeds xA2, or when the ratio C exceeds yC2, a first control instruction is issued. The control operations corresponding to the first control instruction include: turning off the laser module or controlling the power of the laser module to be reduced to below Q0. Either of the two control operations is performed to make the laser light signal drop rapidly in a short time.

[0012] When the laser illumination signal is between A2 and xA2, or when the ratio C is between C2 and yC2, the laser module is in an abnormal state and has a short buffer time, so that safety accidents such as laser leakage and module burning will not occur immediately. Therefore, there is adjustment time, but differential adjustment is required for the two abnormal situations. A second control instruction is issued to continuously reduce the power of the laser module to distinguish between the two subsequent abnormal situations; at the same time, continuously reducing the power of the laser module is also the fastest way to reduce safety risks in this situation.

[0013] After the second control instruction is issued, the laser illumination signal of the outgoing light decreases as the power of the laser module decreases. When the laser illumination signal is between A1 and A2, or when the ratio C is between C1 and C2, it indicates that the efficiency of the laser module in converting laser light into stimulated light can be restored to normal, proving that the abnormal condition is fluorescence quenching. The third control instruction is issued to enable the laser module to maintain the current power to work, resolve the abnormal condition of the laser module, and keep the laser module operating.

[0014] After the second control command is issued, the reduction in the power of the laser module cannot effectively reduce the laser light signal of the outgoing light, Q 设 In order to continuously reduce the cut-off line of the laser module power, it is not lower than the lower limit of the operating power of the laser module. When the output power of the laser module is less than Q 设 , and the laser light signal A has not dropped back to A2 or below A2, or the ratio C has not dropped back to C2 or below C2, the abnormal situation is that there is a safety hazard, and a fourth control instruction is issued. The control operations corresponding to the fourth control instruction include: turning off the laser module or controlling the power of the laser module to be reduced to below Q0. Either of the two control operations is performed to make the laser light signal drop rapidly in a short time.

[0015] The minimum illumination signal A1 and the maximum illumination signal A2 determined according to A0, as well as the minimum value C1 and the maximum value C2 determined according to A0 and B0, are adapted to the operating characteristics of the laser module, effectively improving the judgment accuracy of the above process.

[0016] Furthermore, the x satisfies: 1≤x≤3, and the y satisfies: 1≤y≤3.

[0017] Furthermore, the Q 设 Less than 80% of rated power.

[0018] Furthermore, the continuously reducing the power of the laser module is to continuously reduce the power of the laser module by continuously reducing the current at a reduction rate of 0.1A to 1A / min.

[0019] Furthermore, the laser adjustment method also includes the steps of: when the laser light signal A satisfies: A<A1, or, the ratio C of the laser light signal A and the stimulated laser light signal B satisfies: C<C1, then: continuously increase the power of the laser module until the laser light signal A satisfies: A1≤A≤A2, and maintain the current power of the laser module; or, continuously increase the power of the laser module until the ratio C of the laser light signal A and the stimulated laser light signal B satisfies C1<C<C2, and maintain the current power of the laser module.

[0020] When the laser module is out of abnormal condition, its efficiency of converting laser into stimulated light is improved. Even if the power of the laser module remains unchanged, the ratio C of the laser light signal or the laser light signal A and the stimulated light light signal B will decrease. At this time, the power of the laser module can be appropriately increased to improve the brightness of the laser module and maintain a balanced ratio of laser and stimulated light in the outgoing light. The advantage of the continuous improvement method is that the brightness change of the outgoing light tends to be smooth.

[0021] Furthermore, the light signal is light power, light intensity, light brightness, light illuminance or light flux.

[0022] Based on the same inventive concept as the above-mentioned laser adjustment method, the technical solution of the present invention also includes: a laser adjustment device, comprising a control unit and a laser module driving unit, the control unit being used to implement the laser adjustment method as described above; the laser module driving unit being connected to the control unit, and being used to control the laser module according to the control instructions of the control unit.

[0023] Further, controlling the laser module according to the control instruction of the control unit is specifically: when receiving the second control instruction, reducing the power of the laser module at least twice with a fixed amplitude each time or reducing the power of the laser module at least twice with different reduction amplitudes.

[0024] Furthermore, the control unit is an MCU (single-chip microcomputer), an MPU (microprocessor), an FPGA (field programmable gate array) or a PLD (programmable logic device).

[0025] Based on the same inventive concept as the above-mentioned laser adjustment method, the technical solution of the present invention also includes: a laser adjustment system, comprising a photosensitive electrical device and the laser adjustment device connected to each other; the photosensitive electrical device is used to detect the light signal A of the output light of the laser module, or, for the laser light signal A and the received laser light signal B; the photosensitive electrical device is connected to a control unit.

[0026] Compared with the prior art, the beneficial effects of the present invention are: accurately distinguishing abnormal situations, and taking rapid and effective response measures for abnormal situations of different degrees and types, maintaining the safe operation of the laser module to the greatest extent, and improving the safety and stability of the laser lighting module. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a method step diagram of Example 1 of the present invention.

[0028] Figure 2 This is a method step diagram of Example 2 of the present invention.

[0029] Figure 3 Schematic diagram of the laser adjustment device of embodiments 1 and 2 of the present invention.

[0030] Figure 4 Schematic diagram of the laser adjustment system of embodiments 1 and 2 of the present invention.

[0031] Reference numerals: control unit 1; laser module driving unit 2; photoelectric device 3. DETAILED DESCRIPTION

[0032] The drawings of the present invention are only for illustrative purposes and should not be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0033] The present technical solution discloses a laser adjustment method for adjusting a laser module of an outgoing light beam, comprising the following measuring steps and adjustment steps:

[0034] Measuring step: measuring the laser light signal A0 in the light emitted by the laser module at rated power, or the laser light signal A0 and the stimulated light light signal B0, to obtain the minimum light signal A1 and the maximum light signal A2 of the laser at rated power, or to obtain the minimum value C1 and the maximum value C2 of the ratio of the laser light signal A0 to the stimulated light light signal B0 at rated power;

[0035] Adjustment step: receiving a laser light signal A of an outgoing light, or a laser light signal A and a stimulated light light signal B;

[0036] When the laser illumination signal A satisfies: A>xA2, or the ratio C of the laser illumination signal A and the stimulated laser illumination signal B satisfies: C>yC2, it is determined that the laser module is damaged, and a first control instruction is issued: turn off the laser module, or control the power of the laser module to be reduced to below Q0;

[0037] When the laser illumination signal A satisfies: A2≤A≤xA2, or the ratio C of the laser illumination signal A to the stimulated laser illumination signal B satisfies: C2<C<yC2, it is determined that the laser module is abnormal, and a second control instruction is issued: continuously reducing the power of the laser module;

[0038] When the laser illumination signal A satisfies: A1≤A≤A2 after the second control instruction is issued, or when the ratio C of the laser illumination signal A to the stimulated laser illumination signal B satisfies C1<C<C2, the abnormal situation is determined to be fluorescence quenching, and a third control instruction is issued: maintain the power of the current laser module;

[0039] When the output power of the laser module is less than Q 设 , and when any one of the following conditions is met: the laser illumination signal A>A2 and the ratio of the laser illumination signal A to the stimulated laser illumination signal B C>C2, the abnormal situation is determined to be a potential safety hazard, and a fourth control instruction is issued: immediately shut down the laser module, or control the power of the laser module to be reduced to below Q0;

[0040] Wherein, x, y are the set parameter values; Q0 is the power of the laser module at the threshold current; Q 设 The power is a preset power and is not lower than the lower limit of the operating power of the laser module.

[0041] This technical solution can accurately distinguish abnormal situations based on the light signal, and take quick and effective response measures for abnormal situations of different degrees and types, so as to maintain the safe operation of the laser module to the greatest extent and improve the safety and stability of the laser lighting module. The light signal can be optical power, light intensity, light brightness, illuminance or luminous flux. The laser adjustment method, device and system are explained in detail below, taking the light signal as light intensity as an example.

[0042] Example 1

[0043] like Figure 1 As shown, this embodiment provides a laser adjustment method, which receives the laser light intensity of the emitted light in real time, and includes the following measurement steps and adjustment steps:

[0044] Determination steps:

[0045] S1. Determine the laser light intensity M0 in the output light of the laser module at rated power;

[0046] S2. Determine the minimum light intensity M1 and the maximum light intensity M2 of the laser at the rated power according to M0;

[0047] By determining the minimum light intensity M1 and the maximum light intensity M2 according to M0, the characteristics of the laser module can be effectively determined. In this embodiment, the fluctuation of the laser light intensity is determined according to the working state of the laser module at the rated power when the laser module is working normally. M1 and M2 are the lower limit and upper limit of the laser light intensity respectively.

[0048] Adjustment steps:

[0049] S3. Determine whether the laser light intensity M satisfies: M>xM2, if so, execute step S4a; if not, execute step S4b;

[0050] The x is a set parameter value, which is used to warn that the laser light intensity of the emitted light greatly exceeds the normal use range. In this embodiment, preferably, the x satisfies: 1≤x≤3, and x is within this range, which conforms to the working characteristics of most laser modules, and reasonably distinguishes abnormal situations with high safety risks and abnormal situations with adjustment time, so as to be conducive to the reasonable division of the adjustment scheme of the laser module. In other embodiments, the value of x can be modified according to actual application requirements. The smaller the value of x, the more conservative the adjustment scheme of the laser module is, and the higher the degree of protection for the laser module is. On the contrary, the larger the value of x, the bolder the adjustment scheme of the laser module is, and it can be applied to fields where the laser safety requirements are not so strict.

[0051] S4a issues a first control instruction and jumps to the end step;

[0052] The first control instruction of this embodiment is used to control the shutdown of the laser module. In other embodiments, the first control instruction may also be set to control the power of the laser module to be reduced to below Q0, where Q0 is the power of the laser module at the threshold current;

[0053] S4b determines whether the laser light intensity M satisfies: M2≤M≤xM2, if so, execute step S5; if not, jump to step S10;

[0054] S5. Issue a second control instruction;

[0055] The second control instruction is used to control the start of the process of continuously reducing the power of the laser module. During this process, the laser light intensity of the emitted light is maintained for real-time reception to perform subsequent steps. In the process of continuously reducing the power of the laser module, if the power decreases too fast, the brightness of the laser module will change suddenly. If it decreases too slowly, the adjustment time will be wasted and a potential safety hazard may be caused. Therefore, in this embodiment, preferably, the process of continuously reducing the power of the laser module is specifically as follows: the power of the laser module is continuously reduced by continuously reducing the current by a reduction of 0.1A to 1A / min. The reduction can be the same each time, for example, the current is reduced by a fixed amplitude each time to reduce the power of the laser module, or the reduction amplitude can be different each time, for example, two gears can be set for the difference between M and M2, the difference in the first gear is larger, and the difference in the second gear is smaller. When it is detected that the difference between M and M2 is in the first gear, the current is reduced by a larger reduction (such as 0.5A to 1A / min), and when it is detected that the difference between M and M2 is in the second gear, the current is reduced by a smaller reduction (such as 0.1A to 0.4A / min).

[0056] S6. Determine whether the laser light intensity satisfies: M1≤M≤M2. If so, execute step S7a; if not, execute step S7b;

[0057] S7a issues a third control instruction, and returns to step S3;

[0058] The third control instruction is used to control the process of stopping the continuous reduction of the power of the laser module so that the laser module maintains the current power;

[0059] S7b. Determine whether the current output power of the laser module is less than Q 设 If yes, go to step S8; if no, go back to step S6;

[0060] Among them, Q 设 is the preset power, Q in this embodiment 设 Less than 80% of the rated power, for example, 50% of the rated power of the laser module. In other embodiments, different threshold loads can be set according to different protection levels of the laser module. If the protection level needs to be improved and the risk factor needs to be reduced, Q should be increased. 设 , but it should be noted that Q 设 It should not be lower than the specified operating power limit of the laser module;

[0061] S8. Determine whether the laser light intensity M satisfies: M>M2. If so, execute step S9; if not, jump to step S7a;

[0062] S9. Issue a fourth control instruction and jump to the end step;

[0063] The fourth control instruction of this embodiment is used to control the shutdown of the laser module. In other embodiments, the fourth control instruction can also be set to control the power of the laser module to be reduced to below Q0;

[0064] S10. Determine whether the laser light intensity M satisfies M<M1. If so, execute step S11; if not, return to step S3;

[0065] After the laser light intensity M decreases to M2, the laser module is out of abnormal condition, and the efficiency of converting laser into stimulated light is improved. At this time, the power of the laser module remains unchanged, and the laser light intensity M will gradually decrease;

[0066] S11. Continue to increase the power of the laser module until the laser light intensity M satisfies: M1≤M≤M2, then maintain the current power of the laser module and return to step S3.

[0067] The power of the laser module is appropriately increased, the brightness of the laser module is increased, and the ratio of laser to stimulated light in the outgoing light is maintained in a balanced manner. The advantage of the continuous increase method is that the brightness change of the outgoing light tends to be smooth.

[0068] like Figure 3 As shown, this embodiment also provides a laser adjustment device for implementing the above laser adjustment method, the laser adjustment device includes a control unit 1 and a laser module driving unit 2, the control unit 1 executes the above laser adjustment method, and is connected to the laser module driving unit 2, and transmits the first control instruction and / or the second control instruction and / or the third control instruction and / or the fourth control instruction to the laser module driving unit 2, and the laser module driving unit 2 adjusts the laser module according to the control instruction of the control unit 1. When the laser module driving unit 2 receives the second control instruction, the power of the laser module is reduced by 0.1A to 1A / min each time.

[0069] like Figure 4 As shown, this embodiment also provides a laser adjustment system, in which the laser adjustment system is provided with the laser adjustment device as described above, including a control unit 1, a laser module driving unit 2 and a photoelectric device 3, the photoelectric device 3 is connected to the control unit 1, detects the laser light intensity M of the output light of the laser module and feeds back to the control unit 1 in real time. The control unit in this embodiment is a single-chip microcomputer (MCU), and in other embodiments, the control unit can also be an MPU (microprocessor), FPGA (field programmable gate array) or PLD (programmable logic device), etc.

[0070] The process of the laser adjustment system performing the laser adjustment method is as follows:

[0071] S1. The light-sensing device 3 detects the laser light intensity M0 of the emitted light in real time and feeds it back to the control unit 1;

[0072] S2. The control unit 1 receives the minimum light intensity M1 and the maximum light intensity M2 of the laser in the outgoing light of the laser module at the rated power detected by the light-sensitive electrical device 3;

[0073] S3. The control unit 1 determines whether the laser light intensity M satisfies: M>xM2. If so, execute step S4a; if not, execute step S4b;

[0074] S4a control unit 1 issues a first control instruction and jumps to the end step; the laser module driving unit 2 receives the first control instruction, reduces the power of the laser module to below Q0 or turns off the laser module;

[0075] S4b control unit 1 determines whether the laser light intensity M satisfies: M2≤M≤xM2, if so, execute step S5; if not, jump to step S10;

[0076] S5. The control unit 1 issues a second control instruction; the laser module driving unit 2 receives the second control instruction and continuously reduces the power of the laser module;

[0077] S6. After starting to continuously reduce the power of the laser module, the control unit 1 determines whether the laser light intensity M satisfies: M1≤M≤M2. If so, execute step S7a; if not, execute step S7b;

[0078] S7a control unit 1 issues a third control instruction, and returns to step S3; the laser module driving unit 2 receives the third control instruction, stops reducing the power of the laser module, and maintains the current power of the laser module;

[0079] S7b. Control unit 1 determines whether the current output power of the laser module is less than Q 设 If yes, go to step S8; if no, go back to step S6;

[0080] S8. The control unit 1 determines whether the laser light intensity M satisfies: M>M2. If so, execute step S9; if not, jump to step S7a;

[0081] S9. The control unit 1 issues a fourth control instruction and jumps to the end step; the laser module driving unit 2 receives the fourth control instruction, reduces the power of the laser module to below Q0 or turns off the laser module;

[0082] S10. The control unit 1 determines whether the laser light intensity M satisfies M<M1. If so, execute step S11; if not, return to step S3;

[0083] S11. The laser module driving unit 2 continuously increases the power of the laser module until the laser light intensity M satisfies: M1≤M≤M2, and maintains the current power of the laser module, and returns to step S3.

[0084] Example 2

[0085] like Figure 2 As shown, this embodiment provides a laser adjustment method, which is substantially the same as the embodiment 1, except that the embodiment 2 receives the laser light intensity M and the stimulated light intensity N of the emitted light in real time, and calculates and updates the ratio P in real time according to the formula P=M / N, and includes the following measurement steps and adjustment steps:

[0086] Determination steps:

[0087] A1. The ratio of the outgoing light of the receiving laser module at rated power is P0;

[0088] A2. Determine the minimum value P1 and the maximum value P2 of the ratio of the laser and stimulated light intensity at the rated power according to P0;

[0089] Adjustment steps:

[0090] A3. Determine whether the ratio P satisfies: P>yP2, if so, execute step A4a; if not, execute step A4b;

[0091] A4a issues a first control instruction and jumps to the end step; the first control instruction is to control the shutdown of the laser module or control the power of the laser module to be reduced to below Q0;

[0092] A4b determines whether the ratio P satisfies: P2≤P≤yP2, if so, execute step A5; if not, jump to step A10;

[0093] A5. Issue a second control instruction; the second control instruction is to continuously reduce the power of the laser module;

[0094] A6. Determine whether the ratio P satisfies: P1≤P≤P2. If so, execute step A7a; if not, execute step A7b;

[0095] A7a issues a third control instruction, and returns to step A3; the third control instruction is to stop continuously reducing the power of the laser module;

[0096] A7b. Determine whether the current output power of the laser module is less than Q 设 If yes, go to step A8; if no, go back to step A6;

[0097] A8. Determine whether the ratio P satisfies: P>P2. If so, execute step A9; if not, jump to step A7a;

[0098] A9. Issue the fourth control instruction and jump to the end step; the fourth instruction is to control the laser module to shut down or control the power of the laser module to be reduced to below Q0

[0099] A10. Determine whether the ratio P satisfies P<P1. If so, execute step A11; if not, return to step A3;

[0100] A11. Continue to increase the power of the laser module until the ratio P satisfies: P1≤P≤P2, maintain the current power of the laser module, and return to step A3.

[0101] like Figure 3 As shown, this embodiment also provides a laser adjustment device for implementing the above laser adjustment method, the laser adjustment device includes a control unit 1 and a laser module driving unit 2, the control unit 1 executes the above laser adjustment method, and is connected to the laser module driving unit 2, and transmits the first control instruction and / or the second control instruction and / or the third control instruction and / or the fourth control instruction to the laser module driving unit 2, and the laser module driving unit 2 adjusts the laser module according to the control instruction of the control unit 1. When the laser module driving unit 2 receives the second control instruction, the power of the laser module is reduced by 0.1A to 1A each time.

[0102] like Figure 4 As shown, this embodiment also provides a laser adjustment system, in which the laser adjustment system is provided with the laser adjustment device as described above, including a control unit 1, a laser module driving unit 2 and a photoelectric device 3, the photoelectric device 3 is connected to the control unit 1, detects the laser light intensity M of the output light of the laser module and feeds back to the control unit 1 in real time.

[0103] The process of the laser adjustment system performing the laser adjustment method is as follows:

[0104] The photoelectric device 3 detects the laser light intensity M and the stimulated light intensity N of the emitted light in real time, and feeds back to the control unit 1; the control unit 1 calculates and updates the ratio P in real time according to the formula P=M / N, and performs the following steps:

[0105] A1. The light-sensing device 3 detects the ratio P0 of the light emitted by the laser module at the rated power, and feeds it back to the control unit 1;

[0106] A2 control unit 1 determines the minimum value P1 and the maximum value P2 of the ratio of the laser and stimulated laser light intensity under the rated power according to P0;

[0107] A3. The control unit 1 determines whether the ratio P satisfies: P>yP2, if so, execute step A4a; if not, execute step A4b;

[0108] A4a. The control unit 1 issues a first control instruction and jumps to the end step; the laser module driving unit 2 receives the first control instruction and turns off the laser module;

[0109] A4b control unit 1 determines whether the ratio P satisfies: P2≤P≤yP2, if so, execute step A5; if not, jump to step A10;

[0110] A5. The control unit 1 issues a second control instruction; the laser module driving unit 2 receives the second control instruction and continuously reduces the power of the laser module;

[0111] A6. After starting to continuously reduce the power of the laser module, the control unit 1 determines whether the ratio P satisfies: P1≤P≤P2. If so, execute step A7a; if not, execute step A7b;

[0112] A7a control unit 1 issues a third control instruction, and returns to step A3; the laser module driving unit 2 receives the third control instruction, stops reducing the power of the laser module, and maintains the current power of the laser module;

[0113] A7b. Control unit 1 determines whether the current output power of the laser module is less than Q 设 If yes, go to step A8; if no, go back to step A6;

[0114] A8. The control unit 1 determines whether the ratio P satisfies: P>P2. If so, execute step A9; if not, jump to step A7a;

[0115] A9. The control unit 1 issues a fourth control instruction and jumps to the end step; the laser module driving unit 2 receives the fourth control instruction and turns off the laser module;

[0116] A10. The control unit 1 determines whether the ratio P satisfies P<P1. If so, execute step A11; if not, return to step A3;

[0117] A11. The laser module driving unit 2 continuously increases the power of the laser module until the ratio P satisfies: P1≤P≤P2, maintains the current power of the laser module, and returns to step A3.

[0118] It is worth noting that the above embodiments are explanations of the technical solutions of the present application based on the illumination signal being light intensity. In other embodiments, the illumination signal may also be light power, light brightness, light illuminance or light flux, etc. For those skilled in the art, similar methods may also be used to adjust and protect the laser based on light power, light brightness, light illuminance or light flux, etc. Therefore, when the illumination signal is light power, light brightness, light illuminance or light flux, etc., it also falls within the protection scope of the present technical solution. In view of the fact that the scheme of adjusting and protecting the laser using light power, light brightness, light illuminance or light flux is consistent with the idea of ​​using light intensity, the embodiments of the present application will not be further elaborated one by one.

[0119] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A laser adjustment method for adjusting a laser module of an outgoing light beam, characterized in that: The method includes the following measurement steps and adjustment steps: Measuring step: measuring the laser illumination signal A0 in the light emitted by the laser module at rated power, obtaining the minimum illumination signal A1 and the maximum illumination signal A2 of the laser at rated power, or measuring the laser illumination signal A0 and the received laser illumination signal B0 in the light emitted by the laser module at rated power, obtaining the minimum value C1 and the maximum value C2 of the ratio of the laser illumination signal A0 to the received laser illumination signal B0 at rated power; Adjustment step: receiving a laser light signal A of an outgoing light, or a laser light signal A and a stimulated light light signal B; When the laser illumination signal A satisfies: A>xA2, or the ratio C of the laser illumination signal A to the stimulated laser illumination signal B satisfies: C>yC2, it is determined that the laser module is damaged, and a first control instruction is issued: turn off the laser module, or control the power of the laser module to be reduced to below Q0; When the laser illumination signal A satisfies: A2≤A≤xA2, or the ratio C of the laser illumination signal A to the stimulated laser illumination signal B satisfies: C2<C<yC2, it is determined that the laser module is abnormal, and a second control instruction is issued: continuously reducing the power of the laser module; When the laser illumination signal A satisfies: A1≤A≤A2 after the second control instruction is issued, or when the ratio C of the laser illumination signal A to the stimulated laser illumination signal B satisfies C1<C<C2, the abnormal situation is determined to be fluorescence quenching, and a third control instruction is issued: maintain the power of the current laser module; When the output power of the laser module is less than Q set after the second control instruction is issued, and any one of the conditions of the laser light signal A>A2 and the ratio of the laser light signal A to the stimulated laser light signal B C>C2 is met, the abnormal situation is determined to be a safety hazard, and a fourth control instruction is issued: immediately turn off the laser module, or control the power of the laser module to be reduced to below Q0; Wherein, x, y are set parameter values; Q0 is the power of the laser module at the threshold current; Q is set to a preset power and is not lower than the lower limit of the operating power of the laser module.

2. The laser adjustment method according to claim 1, characterized in that: The x satisfies: 1≤x≤3, and the y satisfies: 1≤y≤3.

3. The laser adjustment method according to claim 1, characterized in that: The Q is set to be less than 80% of the rated power.

4. The laser adjustment method according to claim 1, characterized in that: The continuously reducing the power of the laser module includes continuously reducing the power of the laser module by continuously reducing the current at a reduction rate of 0.1A to 1A / min.

5. The laser adjustment method according to claim 1, characterized in that: The method further includes the following steps: when the laser illumination signal A satisfies: A<A1, or the ratio C of the laser illumination signal A to the stimulated laser illumination signal B satisfies: C<C1, then: continuously increasing the power of the laser module until the laser illumination signal A satisfies: A1≤A≤A2, and maintaining the current power of the laser module; Or, the power of the laser module is continuously increased until the ratio C of the laser illumination signal A to the stimulated laser illumination signal B satisfies C1<C<C2, and the current power of the laser module is maintained.

6. The laser adjustment method according to any one of claims 1 to 5, characterized in that: The light signal is light power, light intensity, light brightness, light illuminance or light flux.

7. A laser adjustment device, comprising a control unit and a laser module driving unit, characterized in that: The control unit is used to implement the laser adjustment method according to any one of claims 1 to 6; The laser module driving unit is connected to the control unit and is used to control the laser module according to the control instructions of the control unit.

8. The laser adjustment device according to claim 7, characterized in that: The laser module is controlled according to the control instruction of the control unit: when a second control instruction is received, the power of the laser module is reduced at least twice with a fixed amplitude each time or the power of the laser module is reduced at least twice with unequal reduction amplitudes each time.

9. The laser adjustment device according to claim 7, characterized in that: The control unit is MCU, MPU, FPGA or CPLD.

10. A laser adjustment system, comprising a light-sensitive electric device and a laser adjustment device according to any one of claims 7 to 9 connected to each other; It is characterized in that The photoelectric device is used to detect the laser light signal A of the output light of the laser module, or to detect the laser light signal A and the stimulated light signal B; The light-sensing device is connected to a control unit.

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