CN108008749B - Laser switching device - Google Patents

Laser switching device Download PDF

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Publication number
CN108008749B
CN108008749B CN201711491864.8A CN201711491864A CN108008749B CN 108008749 B CN108008749 B CN 108008749B CN 201711491864 A CN201711491864 A CN 201711491864A CN 108008749 B CN108008749 B CN 108008749B
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output
laser
control signal
port
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CN108008749A (en
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任戬
刘猛
刘健
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Shenzhen JPT Optoelectronics Co Ltd
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Shenzhen JPT Optoelectronics Co Ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D25/00—Control of light, e.g. intensity, colour or phase
    • G05D25/02—Control of light, e.g. intensity, colour or phase characterised by the use of electric means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping

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  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Semiconductor Lasers (AREA)

Abstract

The invention discloses a laser switching device, which is characterized in that a control signal output by a central control card is received through an input end, then the control signal is processed through a main control circuit to obtain a target control signal required by a laser, and the target control signal is output to the laser through an output end to control the laser to work. Because the target control signal given to the laser is the target control signal required by the laser, the laser can be accurately controlled, and the accuracy of controlling the laser is improved.

Description

Laser switching device
Technical Field
The invention relates to the technical field of signal detection, in particular to a laser switching device.
Background
Lasers are increasingly used in industry and other fields, and for pulsed lasers, the output form is not continuous, but individual light pulses are realized by modulating the light pulses with electricity, so that the realization of control over the laser is very important for the application of the laser.
One implementation of the optical pulse is to adjust Q, i.e. adjust the Q (loss factor) value in the optical resonator, to switch off the optical path, and thus to output the pulse of light. The active Q-switching is typically acousto-optic Q-switching and electro-optic Q-switching, and the on-off of a resonant cavity optical path is realized by electrically modulating a Q crystal, and control signals mainly required by the active Q-switching laser are typically GATE signals (GATE signals), TRIG signals (frequency signals) and FPS signals (first pulse suppression signals), and the characteristics inside the Q crystal are controlled by the three signals so as to further control the on-off of the optical path, and further realize the output of optical pulses according to a required form.
At present, as shown in fig. 1, a control terminal (for example, a personal computer) is often adopted to connect a central control card, the central control card outputs a control signal, the central control card can link a plurality of parts such as a laser, a galvanometer, an application platform and the like, but in terms of laser control, the types of the central control card are various, the output control signal also has various differences, thus, the problem that the phase of the control signal output by the central control card is unequal to that of the control signal required by the laser is easy to cause, the universality is difficult to realize, and the control level or time sequence of the laser of each family is not unified standard in design, so that the need of customizing the central control card for the laser of each family sometimes is caused, otherwise, the effective control of the laser cannot be realized, and the integration difficulty and the use difficulty are greatly increased. In summary, because there are many central control card manufacturers, there are many laser manufacturers and there are different control demand signals of each manufacturer, so that it is difficult to accurately control each laser by using the control signals output by the central control card.
Disclosure of Invention
Based on this, it is necessary to provide a laser switching device for solving the problem that the control signal output by the existing central control card is inaccurate in controlling the laser.
The laser switching device comprises an input end, a main control circuit and an output end, wherein the input end is connected with the output end through the main control circuit, the input end is connected with a central control card, and the output end is connected with a laser;
the input end receives the control signal output by the central control card, the main control circuit processes the control signal to obtain a target control signal required by controlling the laser, and the target control signal is output to the laser to control the laser to work.
In one embodiment, the input end includes a first input end, a second input end and a third input end, the output end includes a first output end, a second output end and a third output end, the first input end is connected with the first output end through the master control circuit, the second input end is connected with the second output end through the master control circuit, and the third input end is connected with the third output end through the master control circuit; the control signals output by the central control card comprise a first control signal, a second control signal and a third control signal, and the target control signals comprise a first target control signal, a second target control signal and a third target control signal;
the first input end receives the first control signal output by the central control card, the main control circuit processes the first control signal to obtain a first target control signal and outputs the first target control signal to the laser, the second input end receives the second control signal output by the central control card, the main control circuit processes the second control signal to obtain a second target control signal and outputs the second target control signal to the laser, the third input end receives the third control signal output by the central control card, and the main control circuit processes the third control signal to obtain a third target control signal and outputs the third target control signal to the laser.
In one embodiment, the main control circuit includes a first power transmission line, a signal inverter and a first two-pin jumper, where the signal inverter and the first two-pin jumper are connected between the first input end and the first output end, one end of the first two-pin jumper is connected with the first signal output end of the signal inverter, and the other end is connected with the first output end; the first input end comprises a first signal port and a second signal port, the first signal port or the second signal port is connected with the central control card, receives the first control signal output by the central control card, the first signal port is connected with the first output end through the first power transmission line, and the second signal port is connected with a first signal input end of the signal inverter, which corresponds to the first signal output end.
In one embodiment, the master control circuit further includes a second power transmission line and a second two-pin jumper, the second two-pin jumper is connected between the second signal output end and the second output end of the signal inverter, one end of the second two-pin jumper is connected with the second signal output end of the signal inverter, and the other end of the second two-pin jumper is connected with the second output end; the second input end comprises a third signal port and a fourth signal port, the third signal port or the fourth signal port is connected with the central control card and receives the second control signal output by the central control card, the third signal port is connected with the second output end through the second power transmission line, and the fourth signal port is connected with a second signal input end of the signal inverter, which corresponds to the second signal output end.
In one embodiment, the master control circuit further includes a third power transmission line and a third two-pin jumper, the third two-pin jumper is connected between a third signal output end and the third output end of the signal inverter, one end of the third two-pin jumper is connected with the third signal output end of the signal inverter, and the other end of the third two-pin jumper is connected with the third output end; the third input end comprises a fifth signal port and a sixth signal port, the fifth signal port or the sixth signal port is connected with the central control card and receives the third control signal output by the central control card, the fifth signal port is connected with the third output end through the third power transmission line, and the sixth signal port is connected with a third signal input end of the signal inverter, which corresponds to the third signal output end.
In one embodiment, the input terminal further comprises a power port for connecting an external power source, and the power port is connected with the signal inverter.
In one embodiment, the circuit further comprises a capacitor connected between the power port and the signal inverter.
In one embodiment, the capacitor comprises a first capacitor and a second capacitor, the first capacitor and the second capacitor being connected in parallel between the power port and the signal inverter.
In one embodiment, the LED further comprises a resistor and a light emitting diode, wherein one end of the resistor is connected with the power port, the other end of the resistor is connected with the positive electrode of the light emitting diode, and the negative electrode of the light emitting diode is grounded.
In one embodiment, the portable electronic device further comprises a main body, the main control circuit is arranged in the main body, and the input end and the output end are arranged on two opposite sides of the main body.
According to the laser switching device, the control signal output by the central control card is received through the input end, the control signal is processed through the main control circuit to obtain the target control signal required by the laser, and the target control signal is output to the laser through the output end to control the laser to work. Because the target control signal given to the laser is the target control signal required by the laser, the laser can be accurately controlled, and the accuracy of controlling the laser is improved.
Drawings
Fig. 1 is a control block diagram of a conventional central control card.
FIG. 2 is a schematic diagram of a laser switching device according to an embodiment;
FIG. 3 is a schematic diagram of a laser switching device according to an embodiment;
FIG. 4 is a diagram of control signals required by the laser according to one embodiment;
FIG. 5 is a diagram of control signals output by a central control card according to an embodiment;
FIG. 6 is a diagram of control signals output by a central control card according to another embodiment;
FIG. 7 is a diagram of control signals output by a central control card according to another embodiment;
fig. 8 is a diagram of control signals output by the central control card according to another embodiment.
Detailed Description
Referring to fig. 2, an embodiment of a laser switching device is provided, which includes an input end 110, a main control circuit 120 and an output end 130, wherein the input end 110 is connected with the output end 130 through the main control circuit 120, the input end 110 is connected with a central control card 200, and the output end 130 is connected with a laser 300. The input terminal 110 receives the control signal output by the central control card 200, and the main control circuit 120 processes the control signal to obtain a target control signal required by controlling the laser 300, and outputs the target control signal to the laser 300 to control the laser 300 to operate.
In general, a control signal output from the central control card 200 is determined, and a control signal required for the operation of the laser 300 is also determined, but the control signal output from the central control card 200 may be different from the control signal required for the operation of the laser 300, so that the central control card 200 cannot effectively and accurately control the laser 300. In this embodiment, a laser adapter is connected between the central control card 200 and the laser 300, so as to process the control signal output by the central control card 200 to obtain a target control signal required by the laser 300, send the target control signal to the laser 300, and perform a light emitting operation after the target control signal.
In the laser switching device, the input end 110 receives the control signal output by the central control card 200, the main control circuit processes the control signal to obtain the target control signal required by the laser 300, and the output end 130 outputs the target control signal to the laser 300 to control the laser 300 to work. Since the target control signal given to the laser 300 is the target control signal required by the laser 300, the laser 300 can be accurately controlled, and the accuracy of controlling the laser 300 is improved.
Referring to fig. 3, in one embodiment, the input terminal 110 includes a first input terminal P1, a second input terminal P3, and a third input terminal P5, the output terminal 130 includes a first output terminal P2, a second output terminal P4, and a third output terminal P6, the first input terminal P1 is connected to the first output terminal P2 through the master circuit 120, the second input terminal P3 is connected to the second output terminal P4 through the master circuit 120, and the third input terminal P5 is connected to the third output terminal P6 through the master circuit 120. The control signals output by the central control card 200 include a first control signal, a second control signal, and a third control signal, and the target control signals include a first target control signal, a second target control signal, and a third target control signal.
The first input end P1 receives the first control signal output by the central control card 200, the main control circuit 120 processes the first control signal to obtain a first target control signal, and outputs the first target control signal to the laser 300, the second input end P3 receives the second control signal output by the central control card 200, the main control circuit 120 processes the second control signal to obtain a second target control signal, and outputs the second target control signal to the laser 300, the third input end P5 receives the third control signal output by the central control card 200, and the main control circuit 120 processes the third control signal to obtain a third target control signal, and outputs the third target control signal to the laser 300.
Since the laser 300 needs to operate under three control signals, the first control signal is a TRIG signal, the second control signal is a GATE signal, and the third control signal is an FPS signal. The three control signals output by different central control cards 200 may be different and the three target control signals required by different lasers 300 may be different. After the first input end P1, the second input end P3 and the third input end P5 in the switching device of the laser 300 respectively receive the corresponding first control signal, second control signal and third control signal, the first control signal, the second control signal and the third control signal are respectively processed by the main control circuit 120 to obtain a first target control signal, a second target control signal and a third target control signal corresponding to the laser 300, and the laser 300 works after receiving the first target control signal, the second target control signal and the third target control signal, so that accurate control of the laser 300 can be realized.
In one embodiment, the master control circuit 120 includes a first power transmission line, a signal inverter U1, and a first two-pin P8, wherein the signal inverter U1 and the first two-pin P8 are connected between the first input end P1 and the first output end P2, one end of the first two-pin P8 is connected to the first signal output end 130 of the signal inverter U1, and the other end is connected to the first output end P2. The first input terminal P1 comprises a first signal port PWM and a second signal port
Figure BDA0001535725730000061
First signal port PWM or second signal port +.>
Figure BDA0001535725730000062
The first signal port PWM is connected with the central control card 200 and receives a first control signal output by the central control card 200 and passes through a first power lineThe second signal port is connected with the first output end P2>
Figure BDA0001535725730000063
A first signal input 110 of the signal inverter U1 corresponding to the first signal output 130 is connected.
Namely, in the present embodiment, the first signal port PWM and the second signal port of the first input terminal P1
Figure BDA0001535725730000064
Only one port is connected with the central control card 200 at the same time, and receives a first control signal output by the control card. The user may select a port to which the central control card 200 is connected according to the first control signal output from the central control card 200 and the control signal required by the laser 300. For example, if the first control signal output by the central control card 200 is the same as the signal required by the laser 300, the first signal port PWM is connected to the central control card 200 without inverting the first control signal, and since the first signal port PWM is connected to the first output terminal P2 through the first power transmission line, the first control signal output by the central control card 200 can be transmitted to the first output terminal P2 through the first signal port PWM and the first power transmission line, and the first output terminal P2 can output the first control signal to the laser 300, and it can be understood that the first control signal is the same as the first target control signal at this time. For another example, if the first control signal outputted from the central control card 200 is opposite to the signal required by the laser 300, the first control signal needs to be inverted, and the second signal port +.>
Figure BDA0001535725730000065
Connect to the central control card 200, in the second signal port +.>
Figure BDA0001535725730000066
When connected with the central control card 200, the jump cap is arranged on the first two-pin jump pin P8 to enable the two ends of the first two-pin jump pin P8 to be short-circuited, at this time, it can be understood that the first two-pin jump pin P8 is short-circuited, and the first signal input of the signal inverter U1The output end 130 is communicated with the first output end P2 through a short-circuited first two-pin latch P8, namely a second signal port +.>
Figure BDA0001535725730000067
The signal inverter U1 is connected to the first output end P2, so that the first control signal output by the central control card 200 is inverted by the signal inverter U1 to obtain a first target control signal, the signal inverter U1 outputs the first target control signal to the first output end P2 through the shorted first two-pin P8, and the first output end P2 can output the first target control signal to the laser 300.
In one embodiment, the main control circuit 120 further includes a second power transmission line and a second two-pin P9, the second two-pin P9 is connected between the second signal output end 130 and the second output end P4 of the signal inverter U1, one end of the second two-pin P9 is connected to the second signal output end 130 of the signal inverter U1, and the other end is connected to the second output end P4. The second input terminal P3 includes a third signal port LASER and a fourth signal port
Figure BDA0001535725730000071
Third signal port LASER or fourth signal port +.>
Figure BDA0001535725730000072
The third signal port LASER is connected with the second output end P4 through a second power transmission line, and the fourth signal port +.>
Figure BDA0001535725730000073
A second signal input 110 of the signal inverter U1 corresponding to the second signal output 130 is connected.
That is, in this embodiment, only one of the third signal port LASER and the fourth signal port of the second input terminal P3 is connected to the central control card 200 at the same time, and receives the second control signal output from the control card. According to central controlIn the case of the second control signal output from the card 200 and the control signal required by the laser 300, the user can select a port to which the center control card 200 is connected. For example, if the second control signal output by the central control card 200 is the same as the signal required by the LASER 300, the third signal port LASER is connected to the central control card 200 without inverting the second control signal, and since the third signal port LASER is connected to the second output terminal P4 through the second power transmission line, the second control signal output by the central control card 200 can be transmitted to the second output terminal P4 through the third signal port LASER and the second power transmission line, and the second output terminal P4 can output the second control signal to the LASER 300, and it can be understood that the second control signal is the same as the second target control signal at this time. For another example, if the second control signal output by the central control card 200 is opposite to the signal required by the laser 300, the second control signal needs to be inverted, and the fourth signal port
Figure BDA0001535725730000074
Connect to the central control card 200 at the fourth signal port
Figure BDA0001535725730000075
When connected with the central control card 200, the jump cap is disposed on the second two-pin jump pin P9 to short-circuit the two ends of the second two-pin jump pin P9, at this time, it can be understood that the second two-pin jump pin P9 is short-circuited, and the fourth signal output end 130 of the signal inverter U1 is communicated with the second output end P4 through the short-circuited second two-pin jump pin P9, i.e. the fourth signal port>
Figure BDA0001535725730000076
The second control signal output by the central control card 200 is inverted by the signal inverter U1 to obtain a second target control signal, the signal inverter U1 outputs the second target control signal to the second output end P4 through the shorted second two-pin P9, the second output end P4 can output the second target control signal to the laser 300, and it can be understood that at this time, the second control signal and the second target control signalThe signal is inverted.
In one embodiment, the main control circuit 120 further includes a third power transmission line and a third two-pin P10, the third two-pin P10 is connected between the third signal output end 130 and the third output end P6 of the signal inverter U1, one end of the third two-pin P10 is connected to the third signal output end 130 of the signal inverter U1, and the other end is connected to the third output end P6. The third input terminal P5 includes a fifth signal port FPS and a sixth signal port
Figure BDA0001535725730000081
Fifth signal port FPS or sixth signal port
Figure BDA0001535725730000082
The fifth signal port FPS is connected with the third output end P6 through a third power transmission line and the sixth signal port>
Figure BDA0001535725730000083
A third signal input 110 of the signal inverter U1 corresponding to the third signal output 130 is connected.
That is, in this embodiment, only one of the fifth signal port FPS and the sixth signal port of the third input terminal P5 is connected to the central control card 200 at the same time, and receives the third control signal output by the control card. The user may select a port to which the central control card 200 is connected according to the third control signal outputted from the central control card 200 and the control signal required for the laser 300. For example, if the third control signal output by the central control card 200 is the same as the signal required by the laser 300, the fifth signal port FPS is connected to the central control card 200 without inverting the third control signal, and since the fifth signal port FPS is connected to the third output terminal P6 through the third power transmission line, the third control signal output by the central control card 200 can be transmitted to the third output terminal P6 through the fifth signal port FPS and the third power transmission line, the third output terminal P6 can output the third control signal to the laser 300, and it can be understood that at this time, the third control signal andthe third target control signal is the same. For another example, if the third control signal outputted from the central control card 200 is opposite to the signal required by the laser 300, the third control signal is inverted, and the sixth signal port is provided
Figure BDA0001535725730000084
Connect to the central control card 200, in the sixth signal port +.>
Figure BDA0001535725730000085
When connected with the central control card 200, the jump cap is disposed on the third two-pin jump pin P10 to short-circuit the two ends of the third two-pin jump pin P10, at this time, it can be understood that the third two-pin jump pin P10 is short-circuited, and the fourth signal output end 130 of the signal inverter U1 is communicated with the third output end P6, i.e. the sixth signal port through the short-circuited third two-pin jump pin P10>
Figure BDA0001535725730000086
The signal inverter U1 is connected to the third output end P6, so that the third control signal output by the central control card 200 is inverted by the signal inverter U1 to obtain a third target control signal, the signal inverter U1 outputs the third target control signal to the third output end P6 through the shorted third two-pin P10, and the third output end P6 can output the third target control signal to the laser 300, which can be understood that the third control signal is inverted with the third target control signal.
In one example, the input terminal 110 further includes a ground terminal GND.
It is understood that in one example, the signal inverter U1 may include a first signal inverter U1, a second signal inverter U1, and a third signal inverter U1. The first signal inverter U1 includes the first signal input terminal 110 and the first signal output terminal 130, the first signal inverter U1 and the first two-pin P8 are connected between the first input terminal P1 and the first output terminal P2, the second signal inverter U1 includes the second signal input terminal 110 and the second signal output terminal 130, and the second two-pin P9 is connected between the second signal output terminal 130 and the second output terminal P4 of the second signal inverter U1. The third signal inverter U1 includes the third signal input terminal 110 and the third signal output terminal 130, and the third two-pin P10 is connected between the third signal output terminal 130 and the third output terminal P6 of the third signal inverter U1.
In one embodiment, the input terminal 110 further includes a power port for connecting to an external power source, and the power port is connected to the signal inverter U1.
The signal inverter U1 needs to work under the power supply effect, so that a power port needs to be provided for connecting an external power supply, and when the power port is connected with the external power supply, the external power supply is connected with the signal inverter U1 through the power port to supply power to the signal inverter U1. In one example, the external power source is a +5v power source.
In one embodiment, a capacitor is also included that is connected between the power port and the signal inverter U1.
And a capacitor is arranged between the signal inverter U1 and the power port, the power port is connected with an external power supply, and when the external power supply supplies power, the electric signal provided by the external power supply can be filtered through the capacitor, so that the signal inverter U1 can work more accurately and stably.
In one embodiment, the capacitor includes a first capacitor C1 and a second capacitor C2, where the first capacitor C1 and the second capacitor C2 are connected in parallel between the power port and the signal inverter U1.
In order to further ensure the filtering effect and further improve the working stability of the signal inverter U1, the capacitor comprises a first capacitor C1 and a second capacitor C2, the first capacitor C1 and the second capacitor C2 are connected in parallel between the power port and the signal inverter U1, and the electric signal is filtered through the first capacitor C1 and the second capacitor C2 together.
In one embodiment, the laser switching device further includes a resistor R and a light emitting diode, one end of the resistor R is connected to the power port, the other end of the resistor R is connected to the positive electrode of the light emitting diode, and the negative electrode of the light emitting diode D is grounded.
When the power port is connected with an external power supply and is powered by the external power supply, the LED D can be also arranged for prompting a user, and the external power supply supplies power to the LED D through the power port, so that the LED D is lightened and is used for indicating the power-on state of the laser adapter. In order to improve the stability of the light emitting diode D, a resistor R is connected between the power port and the light emitting diode D, and the voltage drop is performed through the resistor R, so as to ensure the safety of the light emitting diode D.
In one embodiment, the laser switching device further includes a main body, the main control circuit 120 is disposed in the main body, and the input end 110 and the output end 130 are disposed on opposite sides of the main body. In this way, the input terminal 110, the main control circuit 120, and the input terminal 110 are integrated with the main body, and can be conveniently carried and operated.
Referring to fig. 3, the operation of the laser switching device is described in detail below in an embodiment.
First, as shown in fig. 4, a first target control signal (TRTG in fig. 4) and a second target control signal (GATE in fig. 4) are required for a laser 300, and a third target control signal is not shown. Where PulseWidth is the pulse width. As shown in fig. 5, a first control signal (ttl_output in fig. 5) and a second control signal (laser_gate in fig. 5) are OUTPUT from a central control card 200. As can be seen by comparing the signals in fig. 4 and 5, the first target control signal required by the laser 300 is the same as the first control signal output by the central control card 200, and the second target control signal required by the laser 300 is the same as the second control signal output by the central control card 200, so that the first control signal and the second control signal output by the central control card 200 do not need to be inverted, and only need to be transmitted to the corresponding first output terminal P2 and second output terminal P4 through transmission lines, respectively. The port of the central control card 200 outputting the laser_gate signal (second control signal) is connected to the LASER pin (i.e., third signal port) in the second input terminal P3 of the LASER switching device in fig. 3, and the port of the central control card 200 outputting the ttl_output signal (first control signal) is connected to the PWM pin (i.e., first signal port) in the first input terminal P1. In this way, the laser_gate signal OUTPUT by the central control card 200 is ensured to be transmitted to the second OUTPUT terminal P4, and is OUTPUT to the LASER 300 through the second OUTPUT terminal P4, and the ttl_output signal OUTPUT by the central control card 200 is ensured to be transmitted to the first OUTPUT terminal P2, and is OUTPUT to the LASER 300 through the first OUTPUT terminal P2.
Then, as shown in fig. 6, a first control signal (ttl_output in fig. 6) and a second control signal (laser_gate in fig. 6) are OUTPUT for another central control card 200. As can be seen from comparing the signals required by the laser 300 in fig. 6 and fig. 4, the first target control signal required by the laser 300 is the same as the first control signal output by the central control card 200, and the second target control signal required by the laser 300 is opposite to the second control signal output by the central control card 200, so that the first control signal output by the central control card 200 is not required to be inverted, and the second control signal is required to be inverted, and only the first control signal is required to be transmitted to the corresponding first output terminal P2 through the first transmission line. At this time, the port of the central control card 200 outputting the laser_gate signal (second control signal) is connected to the LASER pin (i.e. the third signal port) in the second input terminal P3 of the LASER switching device in fig. 3, and the port of the central control card 200 outputting the ttl_output signal (first control signal) is connected to the first input terminal P1
Figure BDA0001535725730000111
The pins (i.e., the second signal ports) are connected. In this way, the laser_gate signal OUTPUT by the central control card 200 is ensured to be transmitted to the second OUTPUT terminal P4, and the ttl_output signal OUTPUT by the central control card 200 is ensured to be transmitted to the LASER 300 through the second OUTPUT terminal P4>
Figure BDA0001535725730000112
Pins, short-circuit the first two-pin jump pin P8 through jump cap, make +.>
Figure BDA0001535725730000113
The pin is connected to the first output terminal P2 via the signal inverter U1, whereby +_via the signal inverter U1>
Figure BDA0001535725730000114
The first control signal transmitted by the pin is inverted to obtain a first target control signal, and the first target control signal is output to the laser through a first output end P2300。
Next, as shown in fig. 7, a first control signal (ttl_output in fig. 7) and a second control signal (laser_gate in fig. 7) are OUTPUT for another central control card 200. As can be seen from comparing the signals required by the laser 300 in fig. 7 and fig. 4, the first target control signal required by the laser 300 is opposite to the first control signal output by the central control card 200, and the second target control signal required by the laser 300 is identical to the second control signal output by the central control card 200, so that the first control signal output by the central control card 200 needs to be inverted, and the second control signal does not need to be inverted, but only the first control signal needs to be respectively inverted through the signal inverter U1 and then output to the first output terminal P2, and the second control signal needs to be transmitted to the second output terminal P4 through the second transmission signal. At this time, the port of the central control card 200 outputting the laser_gate signal (second control signal) is connected to the second input terminal P3 of the LASER switching device in fig. 3
Figure BDA0001535725730000115
The pins (i.e., the fourth signal ports) are connected, and the port of the central control card 200 outputting the ttl_output signal (the first control signal) is connected to the PWM pin (i.e., the first signal port) in the first input terminal P1. The second two-leg jump pin P9 is short-circuited by the jump cap to enable +.>
Figure BDA0001535725730000116
The pin is connected to the second output terminal P4 via the signal inverter U1, whereby +_via the signal inverter U1>
Figure BDA0001535725730000121
The second control signal transmitted by the pin is inverted to obtain a second target control signal, and the second target control signal is output to the laser 300 through the second output terminal P4. The ttl_output signal OUTPUT from the central control card 200 is ensured to be transmitted to the first OUTPUT terminal P2, and is OUTPUT to the laser 300 through the first OUTPUT terminal P2.
Again, as shown in fig. 8, a first control signal (ttl_output in fig. 8) and a second control signal (laser_gate in fig. 8) are OUTPUT for another central control card 200. Compare FIGS. 8 and 4As can be seen from the signals required by the laser 300, the first target control signal required by the laser 300 is opposite to the first control signal output by the central control card 200, and the second target control signal required by the laser 300 is opposite to the second control signal output by the central control card 200, so that the first control signal output by the central control card 200 needs to be inverted, and the second control signal needs to be inverted, and then the first control signal is output to the first output end P2 after being inverted through the signal inverter U1, and the second control signal is output to the second output end P4 after being inverted through the signal inverter U1. At this time, the port of the central control card 200 outputting the laser_gate signal (second control signal) is connected to the second input terminal P3 of the LASER switching device in fig. 3
Figure BDA0001535725730000122
The pins (i.e. the fourth signal port) are connected, and the port of the central control card 200 outputting the TTL_OUTPUT signal (first control signal) and the +_ of the first input terminal P1>
Figure BDA0001535725730000123
The pins (i.e., the second signal ports) are connected. Shorting the first two-pin P8 and the second two-pin P9 by the jump cap, < ->
Figure BDA0001535725730000124
The pin is connected to the second output terminal P4 via a signal inverter U1, so that +.>
Figure BDA0001535725730000125
The pin is connected to the first output terminal P2 via the signal inverter U1, whereby +_via the signal inverter U1>
Figure BDA0001535725730000126
The first control signal transmitted by the pin is inverted to obtain a first target control signal, and the first target control signal is output to the laser 300 through the first output terminal P2. It is ensured that the laser_gate signal outputted from the central control card 200 is inverted to obtain a second target control signal, and outputted to the LASER 300 through the second output terminal P4.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing embodiments represent only a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (8)

1. A laser switching device is characterized by comprising an input end, a main control circuit and an output end,
the input end comprises a first input end, a second input end and a third input end, the output end comprises a first output end, a second output end and a third output end, the first input end is connected with the first output end through the main control circuit, the second input end is connected with the second output end through the main control circuit, and the third input end is connected with the third output end through the main control circuit;
the first input end, the second input end and the third input end are connected with a central control card; the first output end, the second output end and the third output end are connected with a laser;
the first input end receives a first control signal output by the central control card, the main control circuit processes the first control signal to obtain a first target control signal, the first target control signal is output to the laser, the second input end receives a second control signal output by the central control card, the main control circuit processes the second control signal to obtain a second target control signal, the second target control signal is output to the laser, the third input end receives a third control signal output by the central control card, the main control circuit processes the third control signal to obtain a third target control signal, and the third target control signal is output to the laser;
the main control circuit comprises a first power transmission line, a signal inverter and a first two-pin jumper, wherein the signal inverter and the first two-pin jumper are connected between the first input end and the first output end, one end of the first two-pin jumper is connected with the first signal output end of the signal inverter, and the other end of the first two-pin jumper is connected with the first output end; the first input end comprises a first signal port and a second signal port, the first signal port or the second signal port is connected with the central control card, receives the first control signal output by the central control card, the first signal port is connected with the first output end through the first power transmission line, and the second signal port is connected with a first signal input end of the signal inverter, which corresponds to the first signal output end.
2. The laser switching device according to claim 1, wherein the main control circuit further comprises a second power transmission line and a second two-pin jumper, the second two-pin jumper is connected between a second signal output end of the signal inverter and the second output end, one end of the second two-pin jumper is connected with the second signal output end of the signal inverter, and the other end of the second two-pin jumper is connected with the second output end; the second input end comprises a third signal port and a fourth signal port, the third signal port or the fourth signal port is connected with the central control card and receives the second control signal output by the central control card, the third signal port is connected with the second output end through the second power transmission line, and the fourth signal port is connected with a second signal input end of the signal inverter, which corresponds to the second signal output end.
3. The laser switching device according to claim 2, wherein the main control circuit further comprises a third power transmission line and a third two-pin jumper, the third two-pin jumper is connected between a third signal output end of the signal inverter and the third output end, one end of the third two-pin jumper is connected with the third signal output end of the signal inverter, and the other end of the third two-pin jumper is connected with the third output end; the third input end comprises a fifth signal port and a sixth signal port, the fifth signal port or the sixth signal port is connected with the central control card and receives the third control signal output by the central control card, the fifth signal port is connected with the third output end through the third power transmission line, and the sixth signal port is connected with a third signal input end of the signal inverter, which corresponds to the third signal output end.
4. The laser switching device of claim 1, wherein the input terminal further comprises a power port for connecting an external power source, the power port being connected to the signal inverter.
5. The laser switching device of claim 4, further comprising a capacitor connected between the power port and the signal inverter.
6. The laser switching device of claim 5, wherein the capacitor comprises a first capacitor and a second capacitor, the first capacitor and the second capacitor being connected in parallel between the power port and the signal inverter.
7. The laser switching device according to claim 4, further comprising a resistor and a light emitting diode, wherein one end of the resistor is connected to the power port, the other end of the resistor is connected to the positive electrode of the light emitting diode, and the negative electrode of the light emitting diode is grounded.
8. The laser switching device of claim 1, further comprising a main body, wherein the main control circuit is disposed within the main body, and wherein the input and output are disposed on opposite sides of the main body.
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