Laser precise synchronizing signal output system

Abstract

The utility model discloses a laser precise synchronizing signal output system, which comprises a central control system, a high-voltage switch trigger, a high-voltage generator, a high-voltage switch, a laser generating unit and detection equipment, the central control system comprises a single-chip microcomputer, a charging signal generating circuit and a synchronizing signal generating circuit. The charging signal output end of the single-chip microcomputer is connected with the high-voltage generator, and the control output end of the single-chip microcomputer is connected with the input end of the charging signal generating circuit. Three output ends of the charging signal generation circuit are respectively connected with the input ends of the high-voltage generator, the high-voltage switch trigger and the synchronous signal generation circuit, and respectively send a path of simultaneous sequence charging signals; the output end of the synchronous signal generation circuit is connected with the detection equipment to send a synchronous control signal, so that the detection equipment is started, and the delay time of the synchronous control signal can be adjusted to control various detection equipment to work synchronously.

Description

[Technical Field]

[0001] This utility model relates to a laser precision synchronization signal output system. [Background Technology]

[0002] Excimer lasers require operation under high voltage conditions. High-voltage switches such as IGBTs and hydrogen thyristors are two typical switches used in high-voltage circuits. During the conduction process, these high-voltage switches couple tens to thousands of volts of spike interference voltage into the trigger terminal. This spike interference voltage can interfere with and damage low-voltage components in the trigger circuit. Meanwhile, utility model patent CN111416272B discloses a triggering and protection circuit for an excimer laser high-voltage switch. This circuit can generate a trigger signal for the high-voltage switch and has the ability to resist high-voltage spike pulse interference, enabling the high-voltage switch to operate stably for a long time. However, this triggering and protection circuit cannot output a precise synchronization control signal to control external detection equipment to work synchronously, such as synchronously controlling a CCD camera to capture images of the instantaneous changes in the laser-matter interaction process, or synchronously controlling a spectrometer to capture the spectral information of the instantaneous changes in the laser-matter interaction process. [Utility Model Content]

[0003] This invention overcomes the shortcomings of the prior art and provides a laser precision synchronization signal output system that can adjust the delay time of the synchronization control signal to control the synchronous operation of various detection devices.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A laser precision synchronization signal output system, characterized in that it includes a central control system, a high-voltage switch trigger, a high-voltage generator, a high-voltage switch, a laser generation unit, and a detection device;

[0006] The grounding terminal of the high-voltage switch trigger is connected to the grounding terminal of the high-voltage switch, and the control output terminal of the high-voltage switch trigger is connected to the trigger terminal of the high-voltage switch.

[0007] The output terminal of the high voltage generator is connected to the collector end of the high voltage switch and the laser generating unit, respectively. The laser generating unit is used to generate laser light.

[0008] The central control system includes a microcontroller, a charging signal generation circuit, and a synchronization signal generation circuit. The microcontroller is used to generate charging signals, the charging signal generation circuit is used to generate multiple simultaneous charging signals, and the synchronization signal generation circuit is used to generate synchronization control signals.

[0009] The microcontroller's charging signal output terminal is connected to the high voltage generator, and the microcontroller's control output terminal is connected to the charging signal generation circuit input terminal.

[0010] The three output terminals of the charging signal generation circuit are respectively connected to the input terminals of the high voltage generator, the high voltage switch trigger, and the synchronization signal generation circuit, and each sends a simultaneous charging signal.

[0011] The output of the synchronization signal generation circuit is connected to the detection equipment to send a synchronization control signal to start the detection equipment.

[0012] The laser precision synchronization signal output system described above is characterized in that: the synchronization signal generation circuit includes a NOT gate inverter U9 and a NOT gate inverter U10. Pin 2 of the NOT gate inverter U9 is connected to one of the output terminals of the charging signal generation circuit. Pin 3 of the NOT gate inverter U9 is grounded. Pin 4 of the NOT gate inverter U9 is connected to one end of a resistor Rp4. Pin 5 of the NOT gate inverter U9 is connected to the power supply of the synchronization signal generation circuit. The other end of the resistor Rp4 is connected to one end of a capacitor C31 and pin 2 of the NOT gate inverter U10. The other end of the capacitor C31 is grounded. Pin 3 of the NOT gate inverter U10 is grounded. Pin 4 of the NOT gate inverter U10 is connected to a detection device. Pin 5 of the NOT gate inverter U10 is connected to the power supply of the synchronization signal generation circuit.

[0013] The laser precision synchronization signal output system described above is characterized in that: resistor Rp4 is an adjustable resistor, the power supply for the synchronization signal generation circuit is a 5V power supply, pin 5 of inverter U9 is grounded through capacitor C24, and pin 5 of inverter U10 is grounded through capacitor C25.

[0014] The laser precision synchronization signal output system described above is characterized in that: the input end of the synchronization signal generation circuit is connected to an optical fiber head FB4, and one of the output ends of the charging signal generation circuit is connected to the optical fiber head FB4 through a fourth optical fiber line. The fourth optical fiber line is used to transmit a synchronous charging signal generated by the charging signal generation circuit to the synchronization signal generation circuit.

[0015] The laser precision synchronization signal output system described above is characterized in that: pin 1 of fiber optic connector FB4 is connected to pin 4, and pin 1 of fiber optic connector FB4 is connected to pin 2 of inverter U9 of NOT gate, pin 2 of fiber optic connector FB4 is grounded, and pin 4 of fiber optic connector FB4 is connected to a 5V power supply.

[0016] The laser precision synchronization signal output system described above is characterized in that: the three output terminals of the charging signal generation circuit are respectively connected to fiber optic heads 21, 11, and 41; fiber optic head 21 is connected to a high-voltage generator via a second fiber optic line, which is used to transmit a simultaneous charging signal generated by the charging signal generation circuit to the high-voltage generator; fiber optic head 11 is connected to a high-voltage switch trigger via a first fiber optic line, which is used to transmit a simultaneous charging signal generated by the charging signal generation circuit to the high-voltage switch trigger; and fiber optic head 41 is connected to fiber optic head FB4 via a fourth fiber optic line.

[0017] The laser precision synchronization signal output system described above is characterized in that: the charging signal generation circuit includes a transistor t1 and a 12V power supply VCC; the base of transistor t1 is connected to the charging signal output terminal of the microcontroller through a resistor R7; the emitter of transistor t1 is grounded; the collector of transistor t1 is connected to the negative input terminal of fiber optic connector 21, the negative input terminal of fiber optic connector 11, and the negative input terminal of fiber optic connector 41, respectively; the power supply VCC is connected to the positive input terminal of fiber optic connector 21 through a resistor R2, to the positive input terminal of fiber optic connector 11 through a resistor R3, and to the positive input terminal of fiber optic connector 41 through a resistor R4.

[0018] The laser precision synchronization signal output system described above is characterized in that: one input terminal of the high-voltage generator is connected to an optical fiber head FB2, which is connected to an optical fiber head 21 via a second optical fiber line; the input terminal of the high-voltage switch trigger is connected to an optical fiber head FB1, which is connected to an optical fiber head 11 via a first optical fiber line; the charging signal output terminal of the microcontroller is connected to an optical fiber head FB31; one input terminal of the high-voltage generator is connected to an optical fiber head FB3, and the optical fiber heads FB31 and FB3 are connected via a third optical fiber line, which is used to transmit the charging signal generated by the microcontroller to the high-voltage generator.

[0019] The laser precision synchronization signal output system described above is characterized in that: a touch screen is connected to the input terminal of the microcontroller, and the touch screen is used to input the trigger signal that makes the microcontroller work.

[0020] The laser precision synchronization signal output system described above is characterized in that: the laser generating unit includes an energy storage capacitor Cs, an inductor Ls, a discharge capacitor Cd, a cathode electrode, and an anode electrode; the output terminal of the high-voltage generator is connected to one end of the energy storage capacitor Cs, and the other end of the energy storage capacitor Cs is connected to one end of the inductor Ls, one end of the discharge capacitor Cd, and the cathode electrode respectively; the other end of the inductor Ls, the other end of the discharge capacitor Cd, and the anode electrode are respectively grounded; the high-voltage switch is a thyristor, and the high-voltage switch trigger is a thyristor trigger board.

[0021] The beneficial effects of this utility model are:

[0022] This invention includes a charging signal generation circuit capable of simultaneously generating a simultaneous charging signal and transmitting it to a high-voltage generator, a high-voltage switch trigger, and a synchronization signal generation circuit; and a synchronization signal generation circuit capable of sending a synchronization control signal to the detection equipment based on the simultaneous charging signal. The synchronization signal generation circuit can output a synchronization control signal 1-2 µs before or after the laser pulse to control the detection equipment to work synchronously. The delay time of the synchronization control signal is adjustable, which can meet the signal accuracy requirements of various detection equipment such as CCD cameras or spectrometers. [Image Description]

[0023] Figure 1 This is a circuit diagram of the present invention;

[0024] Figure 2 This is a diagram showing the relationship between the states of each device and each signal when this utility model is working;

[0025] Figure 3 This is a structural diagram of the charging signal generation circuit of this utility model;

[0026] Figure 4 This is a waveform diagram showing the delay between the falling edge of the charging signal and the laser during the operation of this utility model.

[0027] Figure 5 This is a structural diagram of the synchronization signal generation circuit of this utility model;

[0028] Figure 6 This diagram shows the state of each device and the relationship between each signal in the synchronous signal generation circuit of this utility model. [Detailed Implementation]

[0029] The technical solutions in the embodiments of this utility model will now be clearly and completely described in conjunction with the accompanying drawings.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly. Furthermore, descriptions involving "preferred," "second-best," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "preferred" or "second-best" may explicitly or implicitly include at least one of those features.

[0031] like Figure 1As shown, a laser precision synchronization signal output system includes a central control system, a high-voltage switch trigger, a high-voltage generator, a high-voltage switch, a laser generating unit, a detection device, and fiber optic connectors FB1, FB2, FB3, FB4, FB11, FB21, FB31, and FB41. The grounding terminal of the high-voltage switch trigger is connected to the grounding terminal of the high-voltage switch, and the control output terminal of the high-voltage switch trigger is connected to the triggering terminal of the high-voltage switch. The output terminal of the high-voltage generator is connected to the collector of the high-voltage switch and the laser generating unit, which generates laser light. The high-voltage switch is a thyristor, and the high-voltage switch trigger is a thyristor trigger board. The laser generating unit includes an energy storage capacitor Cs, an inductor Ls, a discharge capacitor Cd, a cathode electrode, and an anode electrode.

[0032] like Figure 1 As shown, the input end of the thyristor trigger board is connected to an optical fiber connector FB1 for receiving simultaneous charging signals; the two input ends of the high voltage generator are connected to optical fiber connectors FB2 and FB3 respectively for receiving simultaneous charging signals and charging signals.

[0033] like Figure 1 As shown, the central control system includes a microcontroller, a charging signal generation circuit, and a synchronization signal generation circuit. The microcontroller is used to generate a charging top signal, the charging signal generation circuit is used to generate three simultaneous charging signals, and the synchronization signal generation circuit is used to generate a synchronization control signal.

[0034] The microcontroller's charging signal output terminal is connected to an optical fiber connector FB31. Optical fiber connector FB31 and optical fiber connector FB3 are connected by a third optical fiber line. The third optical fiber line is used to transmit the charging flat-top signal generated by the microcontroller to the high-voltage generator. At the same time, the microcontroller controls the charging signal generation circuit to work, so that the charging signal generation circuit generates three charging signals in the same sequence.

[0035] like Figure 1 As shown, the three output terminals of the charging signal generation circuit are connected to fiber optic connector 21, fiber optic connector 11, and fiber optic connector 41, respectively. Fiber optic connector 21 is connected to the high-voltage generator via a second fiber optic cable, which is used to transmit a simultaneous charging signal generated by the charging signal generation circuit to the high-voltage generator. Fiber optic connector 11 is connected to the high-voltage switch trigger via a first fiber optic cable, which is used to transmit a simultaneous charging signal generated by the charging signal generation circuit to the high-voltage switch trigger.

[0036] The microcontroller sends a high-voltage flat-top signal to the high-voltage power supply via the third optical fiber. Simultaneously, the microcontroller generates three simultaneous charging signals through a charging signal generation circuit, and transmits one of these simultaneous charging signals to the high-voltage power supply via the second optical fiber. When the high-voltage power supply receives the control signals from the second and third optical fibers, it generates a high voltage and charges the energy storage capacitor Cs. The high-voltage state of the energy storage capacitor is as follows: Figure 2 As shown. Simultaneously, one of the sequential charging signals is transmitted to the thyristor trigger board via the first optical fiber, causing the thyristor trigger board to generate a negative bias positive pulse signal, triggering the thyristor to conduct, thereby enabling the subsequent laser to generate laser light. In this case, as... Figure 1 As shown, a touchscreen is connected to the microcontroller's input terminal. The touchscreen is used to input trigger signals to activate the microcontroller, and the touchscreen sends internal trigger mode light output control commands to the microcontroller. Light output via internal trigger mode, as tested, shows... Figure 4 As shown, the rising edge of the charging signal of the PLD20 laser from Shenzhen Shengfang Technology Co., Ltd. has a delay of approximately 20ms between it and the laser, and the falling edge of the charging signal has a delay of approximately 3.46us between it and the laser.

[0037] like Figure 1 and Figure 3 As shown, the input terminal of the synchronization signal generation circuit is connected to an optical fiber head FB4. The optical fiber head 41 is connected to the optical fiber head FB4 through a fourth optical fiber line. The fourth optical fiber line is used to transmit a synchronous charging signal generated by the charging signal generation circuit to the synchronization signal generation circuit.

[0038] like Figure 5 As shown, the synchronization signal generation circuit includes NOT gate inverters U9 and U10. Pin 2 of NOT gate inverter U9 is connected to one of the output terminals of the charging signal generation circuit. Pin 3 of NOT gate inverter U9 is grounded. Pin 4 of NOT gate inverter U9 is connected to one end of adjustable resistor Rp4. Pin 5 of NOT gate inverter U9 is connected to the 5V power supply of the synchronization signal generation circuit. The other end of adjustable resistor Rp4 is connected to one end of capacitor C31 and pin 2 of NOT gate inverter U10. The other end of capacitor C31 is grounded. Pin 3 of NOT gate inverter U10 is grounded. Pin 4 of NOT gate inverter U10 is connected to the detection device. Pin 5 of NOT gate inverter U10 is connected to the 5V power supply of the synchronization signal generation circuit. Pin 5 of NOT gate inverter U9 is grounded through capacitor C24. Pin 5 of NOT gate inverter U10 is grounded through capacitor C25. Among them, pin 1 of fiber optic connector FB4 is connected to pin 4, and pin 1 of fiber optic connector FB4 is connected to pin 2 of inverter U9 of NOT gate. Pin 2 of fiber optic connector FB4 is grounded, and pin 4 of fiber optic connector FB4 is connected to a 5V power supply.

[0039] The working principle of the synchronization signal generation circuit: Fiber optic connector FB4 is model R-2521Z; NOT gate inverters U9 and U10 are both high-speed devices of model SN74LVC1G14DBVR, capable of outputting a reverse voltage within 20ns. For example... Figure 6 As shown, before receiving the charging signal, fiber optic connector FB4 pin 1 outputs a high level to NOT gate U9 pin 2. NOT gate inverter U9 pin 4 outputs a reverse voltage within 20ns. Simultaneously, adjustable resistor Rp4 and capacitor C31 form a filter circuit. After passing through the filter circuit, the rise and fall slopes of the reverse voltage signal output from NOT gate inverter U9 pin 4 become slower. The degree of slowness is determined by the resistance value of adjustable resistor Rp4 and the capacitance value of capacitor C31. This signal is transmitted to NOT gate inverter U10 pin 2, and after passing through NOT gate inverter U10 pin 4, a steep-edge signal with a rise time of 20ns is output. This signal is then sent as a synchronization control signal to detection equipment such as CCD cameras or spectrometers, causing the detection equipment to start synchronously. This synchronization signal generation circuit realizes the flipping and delay processing of the charging signal, transforming it into a synchronization control signal that can trigger camera startup. The delay time of the synchronization control signal is achieved by adjusting the resistance value of the adjustable resistor Rp4. At the same time, in order to ensure low temperature drift characteristics, the adjustable resistor Rp4 and the capacitor C31 with low temperature drift need to be selected.

[0040] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A laser precision synchronization signal output system, characterized in that: It includes a central control system, a high-voltage switch trigger, a high-voltage generator, a high-voltage switch, a laser generating unit, and testing equipment; The grounding terminal of the high-voltage switch trigger is connected to the grounding terminal of the high-voltage switch, and the control output terminal of the high-voltage switch trigger is connected to the trigger terminal of the high-voltage switch. The output terminal of the high voltage generator is connected to the collector end of the high voltage switch and the laser generating unit, respectively. The laser generating unit is used to generate laser light. The central control system includes a microcontroller, a charging signal generation circuit, and a synchronization signal generation circuit. The microcontroller is used to generate charging signals, the charging signal generation circuit is used to generate multiple simultaneous charging signals, and the synchronization signal generation circuit is used to generate synchronization control signals. The microcontroller's charging signal output terminal is connected to the high voltage generator, and the microcontroller's control output terminal is connected to the charging signal generation circuit input terminal. The three output terminals of the charging signal generation circuit are respectively connected to the input terminals of the high voltage generator, the high voltage switch trigger, and the synchronization signal generation circuit, and each sends a simultaneous charging signal. The output of the synchronization signal generation circuit is connected to the detection equipment to send a synchronization control signal to start the detection equipment.

2. The laser precision synchronization signal output system according to claim 1, characterized in that: The synchronization signal generation circuit includes NOT gate inverters U9 and U10. Pin 2 of NOT gate inverter U9 is connected to one of the output terminals of the charging signal generation circuit. Pin 3 of NOT gate inverter U9 is grounded. Pin 4 of NOT gate inverter U9 is connected to one end of resistor Rp4. Pin 5 of NOT gate inverter U9 is connected to the power supply of the synchronization signal generation circuit. The other end of resistor Rp4 is connected to one end of capacitor C31 and pin 2 of NOT gate inverter U10. The other end of capacitor C31 is grounded. Pin 3 of NOT gate inverter U10 is grounded. Pin 4 of NOT gate inverter U10 is connected to the detection device. Pin 5 of NOT gate inverter U10 is connected to the power supply of the synchronization signal generation circuit.

3. The laser precision synchronization signal output system according to claim 2, characterized in that: Resistor Rp4 is an adjustable resistor. The power supply for the synchronization signal generation circuit is a 5V power supply. Pin 5 of NOT gate inverter U9 is grounded through capacitor C24, and pin 5 of NOT gate inverter U10 is grounded through capacitor C25.

4. The laser precision synchronization signal output system according to claim 2, characterized in that: The input terminal of the synchronization signal generation circuit is connected to the fiber optic connector FB4. One of the output terminals of the charging signal generation circuit is connected to the fiber optic connector FB4 via a fourth fiber optic cable. The fourth fiber optic cable is used to transmit a synchronous charging signal generated by the charging signal generation circuit to the synchronization signal generation circuit.

5. A laser precision synchronization signal output system according to claim 4, characterized in that: The fiber optic connector FB4 pin 1 is connected to pin 4, and the fiber optic connector FB4 pin 1 is connected to the NOT gate inverter U9 pin 2. The fiber optic connector FB4 pin 2 is grounded, and the fiber optic connector FB4 pin 4 is connected to the 5V power supply.

6. The laser precision synchronization signal output system according to claim 4, characterized in that: The three output terminals of the charging signal generation circuit are respectively connected to fiber optic connectors 21, 11, and 41. Fiber optic connector 21 is connected to the high-voltage generator via a second fiber optic cable, which is used to transmit a simultaneous charging signal generated by the charging signal generation circuit to the high-voltage generator. Fiber optic connector 11 is connected to the high-voltage switch trigger via a first fiber optic cable, which is used to transmit a simultaneous charging signal generated by the charging signal generation circuit to the high-voltage switch trigger. Fiber optic connector 41 is connected to fiber optic connector FB4 via a fourth fiber optic cable.

7. A laser precision synchronization signal output system according to claim 6, characterized in that: The charging signal generation circuit includes a transistor t1 and a 12V power supply VCC. The base of transistor t1 is connected to the charging signal output terminal of the microcontroller through a resistor R7. The emitter of transistor t1 is grounded. The collector of transistor t1 is connected to the negative input terminals of fiber optic connector 21, 11, and 41, respectively. The power supply VCC is connected to the positive input terminal of fiber optic connector 21 through a resistor R2, to the positive input terminal of fiber optic connector 11 through a resistor R3, and to the positive input terminal of fiber optic connector 41 through a resistor R4.

8. A laser precision synchronization signal output system according to claim 6, characterized in that: One input terminal of the high-voltage generator is connected to an optical fiber connector FB2, which is connected to an optical fiber connector 21 via a second optical fiber line. The input terminal of the high-voltage switch trigger is connected to an optical fiber connector FB1, which is connected to an optical fiber connector 11 via a first optical fiber line. The charging signal output terminal of the microcontroller is connected to an optical fiber connector FB31. One input terminal of the high-voltage generator is connected to an optical fiber connector FB3, which is connected to the optical fiber connector FB31 via a third optical fiber line. The third optical fiber line is used to transmit the charging signal generated by the microcontroller to the high-voltage generator.

9. A laser precision synchronization signal output system according to claim 1, characterized in that: The microcontroller's input terminal is connected to a touch screen, which is used to input trigger signals that make the microcontroller work.

10. A laser precision synchronization signal output system according to claim 1, characterized in that: The laser generating unit includes an energy storage capacitor Cs, an inductor Ls, a discharge capacitor Cd, a cathode electrode, and an anode electrode. The output terminal of the high-voltage generator is connected to one end of the energy storage capacitor Cs, and the other end of the energy storage capacitor Cs is connected to one end of the inductor Ls, one end of the discharge capacitor Cd, and the cathode electrode, respectively. The other ends of the inductor Ls, the other end of the discharge capacitor Cd, and the anode electrode are grounded, respectively. The high-voltage switch is a thyristor, and the high-voltage switch trigger is a thyristor trigger board.

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