Laser protection circuit
By introducing signal stabilization modules and differential signal lines into the laser protection circuit, the false alarm problem of laser protection circuit is solved, and accurate alarm signal transmission and module protection are achieved.
Patent Information
- Application Number
- CN202421623747.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-10
AI Technical Summary
Existing laser protection circuits are prone to false alarms in open circuit or idle states, and cannot accurately transmit alarm signals to protect the laser.
A laser protection circuit is designed, including a main module, a sub-module, a signal transmission line and a signal stabilization module. The transceiver is connected to the differential signal line and a signal stabilization unit is set to maintain the signal transmission line in the initial stable state to prevent false alarms.
It realizes accurate transmission of alarm signals when the laser is abnormal, avoids false alarms, and ensures that each module is timely shut down and protects the light.
Smart Images
Figure CN223066820U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of lasers, and more specifically, it relates to a laser protection circuit. Background Art
[0002] In a multimode laser system, the total laser power is combined by the powers of multiple sub-modules. When any sub-module has abnormal light output, not only does it need to turn off the light for self-protection, but it also needs to quickly and reliably notify other sub-modules to turn off the light for protection. Therefore, a protection circuit needs to be set up to send alarm signals to each sub-module in a timely manner so that each sub-module can perform light-off protection. However, when the current protection circuit is in an open circuit or idle state, the protection circuit is in an unstable state, and false alarms are likely to occur at this time. Summary of the Utility Model
[0003] The purpose of this application is to provide a laser protection circuit that can accurately transmit alarm signals to protect the laser.
[0004] The technical solution adopted in this application is a laser protection circuit, including:
[0005] A main module, the main module includes a first controller and a first transceiver, and the first controller is connected to the first transceiver;
[0006] Multiple sub-modules, each sub-module respectively includes a second controller and a second transceiver, and the second controller is connected to the second transceiver;
[0007] A signal transmission line, the first transceiver and the second transceiver are respectively connected to the signal transmission line; and
[0008] A signal stability module, the signal stability module is connected to the signal transmission line.
[0009] That is to say, in the laser protection circuit of this application, the main module is provided with a first transceiver connected to the first controller, and the sub-module is provided with a second transceiver connected to the second controller. The first transceiver and the second transceiver are respectively connected to the signal transmission line. In this way, when the first controller of the main module or the second control component of any sub-module detects an abnormality, in addition to performing light-off processing itself, it also sends an alarm signal through the signal transmission line. The main module can receive the alarm signal through the first transceiver to perform actions such as closing the light gate and lowering the high voltage, or other sub-modules can receive the alarm signal through the second transceiver to perform the action of turning off the light.
[0010] In addition, since a signal stability module is connected to the signal transmission line, the signal stability module is used to set the initial state of the signal transmission line, so that the signal transmission line can maintain a stable initial state when no abnormality occurs in the main module and other sub-modules, preventing false alarms.
[0011] Optionally, the signal transmission line is a differential signal line, the first transceiver is connected to the A line and the B line of the signal transmission line respectively, and the second transceiver is connected to the A line and the B line of the signal transmission line respectively.
[0012] Optionally, the signal transmission line is a 485 bus or a CAN bus.
[0013] Optionally, the signal stability module includes a first signal stability unit and a second signal stability unit. The first signal stability unit is connected to the A line of the signal transmission line, and the second signal stability unit is connected to the B line of the signal transmission line.
[0014] Optionally, the first signal stability unit includes a first resistor. One end of the first resistor is connected to the A line of the signal transmission line, and the other end of the first resistor is grounded.
[0015] Optionally, the second signal stability unit includes a second resistor. One end of the second resistor is connected to the B line of the signal transmission line, and the other end of the second resistor is connected to the power supply.
[0016] Optionally, a beam combining module is further included, and the beam combining module is connected to the signal transmission line.
[0017] Optionally, the beam combining module includes a third controller and a third transceiver. The third controller is connected to the third transceiver, and the third transceiver is connected to the signal transmission line.
[0018] Optionally, the first transceiver is a 485 transceiver, the second transceiver is a 485 transceiver, and the third transceiver is a 485 transceiver.
[0019] Optionally, the resistance value of the first resistor is N1, 330Ω ≤ N1 ≤ 400Ω;
[0020] The resistance value of the second resistor is N2, 330Ω ≤ N2 ≤ 400Ω. Description of the Drawings
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0022] Figure 1 This is a structural block diagram of a laser protection circuit provided by an embodiment of the present application.
[0023] Reference numerals:
[0024] 100, main module; 110, first controller; 120, first transceiver;
[0025] 200, sub-module; 210, second controller; 220, second transceiver;
[0026] 300, signal transmission line; 310, line A; 320, line B;
[0027] 400, signal stabilization module; 410, first signal stabilization unit; 420, second signal stabilization unit; 500, beam combining module; 510, third controller; 520, third transceiver. Detailed implementation manners
[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0029] It should be noted that when an element structure is referred to as "fixed to" or "disposed on" another element structure, it can be directly on the other element structure or indirectly on the other element structure. When an element structure is referred to as "connected to" another element structure, it can be directly connected to the other element structure or indirectly connected to the other element structure.
[0030] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.
[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of some applications, "a plurality" means two or more, unless otherwise specifically defined.
[0032] Refer toFigure 1 , this application provides a laser protection circuit, including a main module 100, multiple sub-modules 200, a signal transmission line 300, and a signal stabilization module 400.
[0033] The main module 100 is respectively connected to each sub-module 200 through the signal transmission line 300 to realize signal transmission between the main module 100 and each sub-module 200.
[0034] Further, the signal stabilization module 400 is connected to the signal transmission line 300 so that the signal transmission line 300 can be in an initial state.
[0035] Specifically, the main module 100 may include a first controller 110 and a first transceiver 120, and the first controller 110 is connected to the first transceiver 120.
[0036] Each sub-module 200 may respectively include a second controller 210 and a second transceiver 220, and the second controller 210 is connected to the second transceiver 220.
[0037] The signal transmission line 300 is respectively connected to the first transceiver 120 and the second transceiver 220.
[0038] During operation, each sub-module 200 can detect the light intensity and temperature of its own module through the second controller 210. Once the light intensity and temperature are abnormal, the second controller 210 immediately performs light-off processing, and at the same time sends an alarm signal to the signal transmission line 300 through the second transceiver 220. After the second transceiver 220 of other sub-modules 200 receives the alarm signal through the signal transmission line 300, the second controller 210 immediately performs light-off processing. After the first transceiver 120 of the main module 100 receives the alarm signal through the signal transmission line 300, the first controller 110 can perform actions such as lowering the high voltage and turning off the light shutter. At the same time, the first controller 110 of the main module 100 can also detect the environmental information of the laser operation, such as the water temperature, water flow rate, ambient temperature, ambient humidity, etc. of the laser operation. Once the environmental information is abnormal, the first controller 110 of the main module 100 actively lowers the high voltage and turns off the light shutter.
[0039] That is to say, in the laser protection circuit of the present application, the main module 100 is provided with a first transceiver 120 connected to the first controller 110, and the sub-module 200 is provided with a second transceiver 220 connected to the second controller 210. The first transceiver 120 and the second transceiver 220 are respectively connected to the signal transmission line 300. In this way, when the first controller 110 of the main module 100 or the second control component of any one of the sub-modules 200 detects an abnormality, in addition to performing light-off processing itself, an alarm signal is sent through the signal transmission line 300. The main module 100 can receive the alarm signal through the first transceiver 120 to perform actions such as closing the shutter and lowering the high voltage, or other sub-modules 200 can receive the alarm signal through the second transceiver 220 to perform light-off actions.
[0040] In addition, since the signal transmission line 300 is connected to a signal stabilization module 400, the signal stabilization module 400 is used to set the initial state of the signal transmission line 300, so that the signal transmission line 300 can maintain a stable initial state when no abnormality occurs in the main module 100 and other sub-modules 200, preventing false alarms.
[0041] Furthermore, the signal transmission line 300 can be a differential signal line. The first transceiver 120 is respectively connected to the A line 310 and the B line 320 of the signal transmission line 300, and the second transceiver 220 is respectively connected to the A line 310 and the B line 320 of the signal transmission line 300.
[0042] It can be understood that the differential signal line transmits through differential signals. Differential signal transmission uses two lines to transmit signals, that is, through the A line 310 and the B line 320. The signal amplitudes of these two lines are equal, the phases differ by 180 degrees, and the polarities are opposite. The signal receiving end compares the potential difference between these two signals to determine the logic 0 and logic 1 of the data sent by the sending end.
[0043] In some embodiments, the signal transmission line 300 can be a 485 bus or a CAN bus.
[0044] Refer to Figure 1 In some embodiments, the signal stabilization module 400 can include a first signal stabilization unit 410 and a second signal stabilization unit 420. The first signal stabilization unit 410 is connected to the A line 310 of the signal transmission line 300, and the second signal stabilization unit 420 is connected to the B line 320 of the signal transmission line 300.
[0045] Among them, when no abnormality occurs in the main module 100 and other sub-modules 200, the first signal stabilization unit 410 and the second signal stabilization unit 420 can make the A line 310 and the B line 320 maintain within a predetermined range in the differential input of the main module 100 and each sub-module 200, so that the signal transmission line 300 can maintain a stable initial state and prevent false alarms.
[0046] For example, in some embodiments, taking the signal transmission line 300 as the 485 bus as an example.
[0047] When the differential signal between the A line 310 and the B line 320 of the signal transmission line 300, i.e., A - B ≥ 200 mV, the signal transmission line 300 generates a high level 1, which means that the main module 100 or the sub-module 200 sends an alarm signal to the signal transmission line 300. At this time, the signal transmission line 300 can transmit this alarm signal.
[0048] When the differential signal between the A line 310 and the B line 320 of the signal transmission line 300, i.e., A - B ≤ -200 mV, the signal transmission line 300 generates a low level 0, which means that the main module 100 or the sub-module 200 does not send an alarm signal to the signal transmission line 300. At this time, the signal transmission line 300 does not transmit the alarm signal.
[0049] However, when the differential signal between the A line 310 and the B line 320 of the signal transmission line 300, i.e., -200 mV ≤ A - B ≤ 200 mV, for example, when the signal transmission line 300 is in an open circuit or idle state, the signal transmission line 300 is in a high-impedance state. At this time, the signal transmission line 300 is in an uncertain state and is easily interfered by the outside world to generate false alarm signals. Therefore, in this application, when the main module 100 and other sub-modules 200 do not have abnormalities, through the provided first signal stabilizing unit 410 and second signal stabilizing unit 420, it is possible to maintain the differential input of the A line 310 and the B line 320 of the signal transmission line 300 at A - B ≤ -200 mV in the main module 100 and each sub-module 200, ensuring that the signal transmission line 300 maintains a stable initial state, i.e., a low level 0, to prevent false alarms.
[0050] Further, in some embodiments, the first signal stabilizing unit 410 may include a first resistor. One end of the first resistor is connected to the A line 310 of the signal transmission line 300, and the other end of the first resistor is grounded.
[0051] The second signal stabilizing unit 420 includes a second resistor. One end of the second resistor is connected to the B line 320 of the signal transmission line 300, and the other end of the second resistor is connected to the power supply.
[0052] For example, in some embodiments, the resistance value of the first resistor is N1, 330 Ω ≤ N1 ≤ 400 Ω; the resistance value of the second resistor is N2, 330 Ω ≤ N2 ≤ 400 Ω.
[0053] Specifically, the resistance value of the first resistor can be 330 Ω, 350 Ω, 370 Ω, 390 Ω, 400 Ω, etc.
[0054] The resistance value of the second resistor can be 330Ω, 350Ω, 370Ω, 390Ω or 400Ω, etc.
[0055] Refer to Figure 1 , in some embodiments, the laser protection circuit may further include a beam combining module 500, and the beam combining module 500 is connected to the signal transmission line 300. The beam combining module 500 is used to combine the laser beams of multiple sub-modules 200 together and monitor the intensity and temperature of the combined laser beam. When the beam combining module 500 detects an abnormality in the combined light, the beam combining module 500 sends an alarm signal to the signal transmission line 300. The main module 100 can receive the alarm signal transmitted by the signal transmission line 300 through the first transceiver 120, and each sub-module 200 can respectively receive the alarm signal transmitted by the signal transmission line 300 through the second transceiver 220.
[0056] Specifically, the beam combining module 500 may include a third controller 510 and a third transceiver 520. The third controller 510 is connected to the third transceiver 520, and the third transceiver 520 is connected to the signal transmission line 300.
[0057] The third controller 510 is used to monitor the intensity and temperature of the combined light formed by multiple sub-modules 200. When the third controller 510 detects an abnormality in the combined light, the third transceiver 520 sends an alarm signal to the signal transmission line 300.
[0058] Among them, when the signal transmission line 300 is a differential signal line, the third transceiver 520 is respectively connected to the A line 310 and the B line 320 of the signal transmission line 300.
[0059] In some embodiments, the first transceiver 120 can be a 485 transceiver, the second transceiver 220 can be a 485 transceiver, and the third transceiver 520 can be a 485 transceiver.
[0060] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of this application shall be included within the protection scope of this application.
Claims
1. A laser protection circuit, characterized in that, Including: A main module, the main module includes a first controller and a first transceiver, and the first controller is connected to the first transceiver; A plurality of sub-modules, each sub-module respectively includes a second controller and a second transceiver, and the second controller is connected to the second transceiver; A signal transmission line, the first transceiver and the second transceiver are respectively connected to the signal transmission line; and A signal stabilization module, the signal stabilization module is connected to the signal transmission line.
2. The laser protection circuit according to claim 1, wherein, The signal transmission line is a differential signal line, the first transceiver is respectively connected to the A line and the B line of the signal transmission line, and the second transceiver is respectively connected to the A line and the B line of the signal transmission line.
3. The laser protection circuit according to claim 2, characterized in that, The signal transmission line is a 485 bus or a CAN bus.
4. The laser protection circuit according to claim 2, characterized in that, The signal stabilization module includes a first signal stabilization unit and a second signal stabilization unit, the first signal stabilization unit is connected to the A line of the signal transmission line, and the second signal stabilization unit is connected to the B line of the signal transmission line.
5. The laser protection circuit according to claim 4, wherein The first signal stabilization unit includes a first resistor, one end of the first resistor is connected to the A line of the signal transmission line, and the other end of the first resistor is grounded.
6. The laser protection circuit according to claim 5, wherein The second signal stabilization unit includes a second resistor, one end of the second resistor is connected to the B line of the signal transmission line, and the other end of the second resistor is connected to a power supply.
7. The laser protection circuit according to claim 1, wherein It further includes a beam combining module, and the beam combining module is connected to the signal transmission line.
8. The laser protection circuit according to claim 7, wherein, The beam combining module includes a third controller and a third transceiver, the third controller is connected to the third transceiver, and the third transceiver is connected to the signal transmission line.
9. The laser protection circuit according to claim 8, characterized in that The first transceiver is a 485 transceiver, the second transceiver is a 485 transceiver, and the third transceiver is a 485 transceiver.
10. The laser protection circuit according to claim 6, characterized in that, The resistance value of the first resistor is N1, 330Ω ≤ N1 ≤ 400Ω; The resistance value of the second resistor is N2, 330Ω ≤ N2 ≤ 400Ω.