Dual serial port time-sharing control excimer laser communication circuit

Abstract

The application discloses a double-serial-port time-sharing control excimer laser communication circuit, which comprises at least one communication signal mutual conversion circuit for mutual conversion of excimer laser communication signals and touch screen communication signals and mutual conversion of excimer laser communication signals and intelligent device communication signals, and is connected with a touch screen interface, an intelligent device interface, a laser signal sending circuit and a laser signal receiving circuit. The isolation of switch diode D1 and switch diode D2 in the laser signal receiving circuit makes the levels of two data receiving pins not affect each other, the triode T2 is turned on, the optical fiber receiving head F2 emits light to receive data, when one of the two is at a low level, the RXD signal output by the communication signal mutual conversion circuit is pulled low, so that the triode T2 is cut off and the optical fiber receiving head F2 does not receive data, thereby realizing the time-sharing signal transmission function between the touch screen, the intelligent device computer end and the laser.

Description

[TECHNICAL FIELD]

[0001] The application relates to a double-serial-port time-division control excimer laser communication circuit. [BACKGROUND]

[0002] The original communication mode of an excimer laser is single-touch screen or computer terminal single control through an RS232 serial port, and generally, the excimer laser needs to be connected with the touch screen and the computer terminal to realize multi-host time-division control.

[0003] The principle of realizing multi-host time-division control of the excimer laser by connecting the touch screen and the computer terminal simultaneously is shown in the figure, Figure 1 The receiving port and the sending port of the DB9 of the touch screen and the computer terminal are directly connected together and are connected with the receiving and sending ports of a TTL / 232 mutual conversion communication box at the same time, the TTL / 232 mutual conversion communication box can send data to the touch screen and the computer terminal at the same time, the touch screen and the computer terminal synchronously receive and correctly display, but since the output sending feet of the computer terminal and the touch screen all have the ability of adsorbing current, when the touch screen or the computer terminal sends data to the laser through the receiving port of the TTL / 232 mutual conversion communication box, one sending data will interfere with the other sending data, leading to the sending failure of the sending data of the touch screen or the computer terminal. [SUMMARY]

[0004] The application overcomes the defects of the prior art and provides a double-serial-port time-division control excimer laser communication circuit.

[0005] In order to realize the above object, the application adopts the following technical scheme:

[0006] A double serial port time-sharing control excimer laser communication circuit, characterized in that: it comprises at least one communication signal mutual conversion circuit for mutual conversion of excimer laser communication signals and touch screen communication signals and for mutual conversion of excimer laser communication signals and intelligent device communication signals, the communication signal mutual conversion circuit is connected with a touch screen interface for communication with the touch screen, an intelligent device interface connected with the intelligent device, a laser signal sending circuit connected with the excimer laser for sending communication signals, and a laser signal receiving circuit connected with the excimer laser for receiving communication signals, the laser signal receiving circuit comprises a fiber receiving head F2, pins 3-6 of the fiber receiving head F2 are respectively connected with the excimer laser, pin 1 of the fiber receiving head F2 is connected with the VCC power supply through a resistor R3, pin 2 of the fiber receiving head F2 is connected with the collector of a triode T2, the emitter of the triode T2 is grounded, the base of the triode T2 is connected with one end of a resistor R5, a positive electrode end of a diode D1, and a positive electrode end of a diode D2 through resistors 4, the other end of the resistor R5 is connected with the VCC power supply, a negative electrode end of the diode D1 is connected with one communication signal receiving end of the communication signal mutual conversion circuit, and a negative electrode end of the diode D2 is connected with another communication signal receiving end of the communication signal mutual conversion circuit.

[0007] A double serial port time-sharing control excimer laser communication circuit as described above, characterized in that: the communication circuit is provided with a communication signal mutual conversion circuit, which is a TTL / RS232 communication signal mutual conversion circuit for mutual conversion of excimer laser TTL communication signals and touch screen RS232 communication signals, and for mutual conversion of excimer laser TTL communication signals and intelligent device RS232 communication signals, the TTL / RS232 communication signal mutual conversion circuit comprises a TTL / RS232 mutual conversion chip U1, a negative electrode end of a diode D1 is connected with a TTL sending pin 12 of the TTL / RS232 mutual conversion chip U1, and a negative electrode end of a diode D2 is connected with a TTL sending pin 9 of the TTL / RS232 mutual conversion chip U1.

[0008] The double serial port time-sharing control excimer laser communication circuit as claimed in claim 1 or 2, characterized in that the TTL / RS232 mutual conversion chip U1 has a capacitor C3 connected between pin 1 and pin 3, a capacitor C5 connected between pin 4 and pin 5, the TTL receiving pins 10-11 of the TTL / RS232 mutual conversion chip U1 are connected with the laser signal sending circuit, pin 15 of the TTL / RS232 mutual conversion chip U1 is grounded, pin 6 of the TTL / RS232 mutual conversion chip U1 is grounded through a capacitor C6, the RS232 signal receiving pin 8 and the RS232 signal sending pin 7 of the TTL / RS232 mutual conversion chip U1 are connected with the touch screen interface, the RS232 signal receiving pin 13 and the RS232 signal sending pin 14 of the TTL / RS232 mutual conversion chip U1 are connected with the intelligent device interface, pin 16 of the TTL / RS232 mutual conversion chip U1 is connected with one end of a capacitor C2 and a VCC power supply, the other end of the capacitor C2 is grounded, and pin 2 of the TTL / RS232 mutual conversion chip U1 is grounded through a capacitor C1.

[0009] The double serial port time-sharing control excimer laser communication circuit as claimed in claim 1 or 2, characterized in that the laser signal sending circuit comprises a fiber sending head F1, the pins 5-6 of the fiber sending head F1 are connected with the excimer laser, pin 2 of the fiber sending head F1 is grounded, pin 3 of the fiber sending head F1 is connected with a VCC power supply, pin 1 of the fiber sending head F1 is connected with pin 4 of the fiber sending head F1, one end of a resistor R2 and one end of a capacitor C4, the other end of the capacitor C4 is grounded, the other end of the resistor R2 is connected with the base of a triode T1, the collector of the triode T1 is connected with the TTL receiving pins 10-11 of the TTL / RS232 mutual conversion chip U1 and one end of a resistor R1, the other end of the resistor R1 is connected with the VCC power supply, and the emitter of the triode T1 is grounded.

[0010] The double serial port time-sharing control excimer laser communication circuit as claimed in claim 1, characterized in that the communication circuit is provided with two communication signal mutual conversion circuits, one of which is a TTL / RS232 communication signal mutual conversion circuit for mutual conversion of excimer laser TTL communication signals and touch screen RS232 communication signals, and the other is a TTL / RS485 communication signal mutual conversion circuit for mutual conversion of excimer laser TTL communication signals and intelligent device RS485 communication signals, the touch screen interface is connected with the TTL / RS232 communication signal mutual conversion circuit, the intelligent device interface is connected with the TTL / RS485 communication signal mutual conversion circuit, the laser signal sending circuit is connected with the TTL / RS232 communication signal mutual conversion circuit and the TTL / RS485 communication signal mutual conversion circuit respectively, the TTL / RS232 communication signal mutual conversion circuit comprises a TTL / RS232 mutual conversion chip U1, the TTL / RS485 communication signal mutual conversion circuit comprises a TTL / RS485 mutual conversion chip U2, the negative terminal of a diode D1 is connected with a TTL sending pin 9 of the TTL / RS232 mutual conversion chip U1, and the negative terminal of a diode D2 is connected with a TTL sending pin 1 of the TTL / RS485 mutual conversion chip U2.

[0011] The double serial port time-sharing control excimer laser communication circuit as claimed in claim 1, characterized in that a capacitor C3 is connected between a pin 1 and a pin 3 of the TTL / RS232 mutual conversion chip U1, a capacitor C5 is connected between a pin 4 and a pin 5 of the TTL / RS232 mutual conversion chip U1, a TTL receiving pin 10 of the TTL / RS232 mutual conversion chip U1 is connected with the laser signal sending circuit, a pin 15 of the TTL / RS232 mutual conversion chip U1 is grounded, a pin 6 of the TTL / RS232 mutual conversion chip U1 is grounded through a capacitor C6, an RS232 signal receiving pin 8 and an RS232 signal sending pin 7 of the TTL / RS232 mutual conversion chip U1 are connected with the touch screen interface respectively, a pin 16 of the TTL / RS232 mutual conversion chip U1 is connected with one end of a capacitor C2 and a VCC power supply respectively, the other end of the capacitor C2 is grounded, and a pin 2 of the TTL / RS232 mutual conversion chip U1 is grounded through a capacitor C1.

[0012] The double serial port time-sharing control excimer laser communication circuit as described above, characterized in that: the TTL / RS485 mutual conversion chip U2 pin 2 is connected with the TTL / RS485 mutual conversion chip U2 pin 3, the one end of the resistor R7 and the collector of the triode T3 respectively, the other end of the resistor R7 is connected with the VCC power supply, the base of the triode T3 is connected with the laser signal sending circuit through the resistor R6, the emitter of the triode T3 is grounded, the TTL / RS485 mutual conversion chip U2 pin 4 is grounded, the TTL / RS485 mutual conversion chip U2 pin 5 is grounded, the TTL / RS485 mutual conversion chip U2 pin 6 is connected with the one end of the resistor R8, the one end of the TVS diode D5, the one end of the TVS diode D4 and the common mode inductor L1 pin 2 respectively, the other end of the resistor R8 is connected with the VCC power supply, the other end of the TVS diode D5 is grounded, the other end of the TVS diode D4 is connected with the TTL / RS485 mutual conversion chip U2 pin 7, the one end of the resistor R10, the one end of the TVS diode D3 and the common mode inductor L1 pin 1 respectively, the other end of the resistor R10 is grounded, the other end of the TVS diode D3 is grounded, the common mode inductor L1 pin 3 is connected with the one end of the resistor R9, the one end of the electric discharge tube GDT1 pin 1 and the intelligent device interface respectively, the common mode inductor L1 pin 4 is connected with the other end of the resistor R9, the other end of the electric discharge tube GDT1 pin 2 and the intelligent device interface respectively, the electric discharge tube GDT1 pin 3 is connected with the one end of the capacitor C8 and the one end of the resistor R11 respectively, the other end of the capacitor C8 and the other end of the resistor R11 are grounded respectively, the electric discharge tube GDT1 pin 3 is grounded, the TTL / RS485 mutual conversion chip U2 pin 8 is connected with the one end of the capacitor C7 and the VCC power supply respectively, the other end of the capacitor C7 is grounded.

[0013] The double serial port time-sharing control excimer laser communication circuit as described above, characterized in that: the laser signal sending circuit comprises the optical fiber sending head F1, the optical fiber sending head F1 pin 5-6 is connected with the excimer laser respectively, the optical fiber sending head F1 pin 2 is grounded, the optical fiber sending head F1 pin 3 is connected with the VCC power supply, the optical fiber sending head F1 pin 1 is connected with the optical fiber sending head F1 pin 4, the one end of the resistor R2 and the one end of the capacitor C4 respectively, the other end of the capacitor C4 is grounded, the other end of the resistor R2 is connected with the base of the triode T1, the collector of the triode T1 is connected with the TTL receiving pin 10 of the TTL / RS232 mutual conversion chip U1, the resistor R6 of the TTL / RS485 communication signal mutual conversion circuit and the one end of the resistor R1 respectively, the other end of the resistor R1 is connected with the VCC power supply, the emitter of the triode T1 is grounded.

[0014] The double serial port time-sharing control excimer laser communication circuit as described above, characterized in that: the communication circuit further comprises a power supply circuit, the power supply circuit comprises a DC socket PWR2.5, pin 1 of the DC socket PWR2.5 is connected with pin 4 of a common mode inductor L2, pins 2-3 of the DC socket PWR2.5 are respectively connected with pin 1 of the common mode inductor L2, pin 3 of the common mode inductor L2 is respectively connected with one end of a capacitor C9, one end of a capacitor C12 and pin 1 of a voltage reduction chip TMR1, pin 2 of the common mode inductor L2, the other end of the capacitor C9, the other end of the capacitor C12 and pin 2 of the voltage reduction chip TMR1 are grounded, pin 7 of the voltage reduction chip TMR1 is respectively connected with one end of a capacitor C10 and one end of a capacitor C11, pin 5 of the voltage reduction chip TMR1, the other end of the capacitor C10 and the other end of the capacitor C11 are grounded, pin 1 of the voltage reduction chip TMR1 outputs a VCC12V power supply, and pin 7 of the voltage reduction chip TMR1 outputs a VCC power supply.

[0015] The double serial port time-sharing control excimer laser communication circuit as described above, characterized in that: the intelligent device is a computer.

[0016] The present application has the following advantages:

[0017] The isolation of the switch diode D1 and the switch diode D2 of the laser signal receiving circuit in the present application makes the levels of the two receiving data pins not affect each other, the triode T2 is turned on, the optical fiber receiving head F2 emits light to receive data, when one of the two is a low level, the RXD signal output by the communication signal conversion circuit is pulled low, so that the triode T2 is cut off, and the optical fiber receiving head F2 does not receive data, thereby realizing the time-sharing signal transmission function between the touch screen, the intelligent device computer and the laser. [SUMMARY]

[0018] Figure 1 It is a laser multi-host time-sharing control schematic diagram in the prior art;

[0019] Figure 2 It is a principle diagram of the first embodiment of the present application;

[0020] Figure 3 It is a circuit structure diagram of the first embodiment of the present application;

[0021] Figure 4 It is a principle diagram of the second embodiment of the present application;

[0022] Figure 5 It is a circuit structure diagram of the second embodiment of the present application. [DETAILED DESCRIPTION]

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. Furthermore, descriptions involving "preferred," "second-best," etc., in this invention 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, a feature defined as "preferred" or "second-best" may explicitly or implicitly include at least one of those features.

[0025] like Figure 2 and Figure 4 As shown, a dual-serial-port time-division control excimer laser communication circuit includes at least one communication signal conversion circuit 1 for converting excimer laser communication signals to touchscreen communication signals and for converting excimer laser communication signals to smart device communication signals. The communication signal conversion circuit 1 is connected to a touchscreen interface 2 for communication with the touchscreen, a smart device interface 3 for communication with the smart device, a laser signal transmitting circuit 4 for transmitting communication signals to the excimer laser, and a laser signal receiving circuit 5 for receiving communication signals to the excimer laser. The laser signal receiving circuit 5 includes an optical fiber receiver F. 2. Pins 3-6 of the fiber optic receiver F2 are connected to the excimer laser. Pin 1 of the fiber optic receiver F2 is connected to the VCC power supply through resistor R3. Pin 2 of the fiber optic receiver F2 is connected to the collector of transistor T2. The emitter of transistor T2 is grounded. The base of transistor T2 is connected to one end of resistor R5, the positive terminal of diode D1, and the positive terminal of diode D2 through resistor 4. The other end of resistor R5 is connected to the VCC power supply. The negative terminal of diode D1 is connected to one communication signal receiver of communication signal conversion circuit 1, and the negative terminal of diode D2 is connected to the other communication signal receiver of communication signal conversion circuit 1. The intelligent device is a computer.

[0026] In order to solve the problem that the TTL / RS232 mutual conversion chip U1 receives the TTL signal of the excimer laser, the TTL sending pin 12 and the TTL sending pin 9 have the ability of adsorbing current and cause interference between each other, so that the RS232 communication signal data input by the touch screen or the computer is converted into TTL communication signal data by the TTL / RS232 mutual conversion chip and then sent to the excimer laser, and the sending fails. Therefore, the switch diode D1 connected to the TTL sending pin 12 of the TTL / RS232 mutual conversion chip U1 and the switch diode D2 connected to the TTL sending pin 11 are connected to play an isolation role, and the resistor R5 is connected between the base of the triode T2 of the optical signal receiving circuit 5 and the VCC power supply, so that the time-sharing signal transmission between the touch screen, the computer and the laser can be realized.

[0027] Embodiment one: the specific circuit connection structure is shown in the figure Figures 2-3 As shown in the figure, the communication circuit is provided with a communication signal mutual conversion circuit 1, the communication signal mutual conversion circuit 1 is a TTL / RS232 communication signal mutual conversion circuit for converting the TTL communication signal of the excimer laser and the RS232 communication signal of the touch screen, and converting the TTL communication signal of the excimer laser and the RS232 communication signal of the intelligent device, the TTL / RS232 communication signal mutual conversion circuit comprises a TTL / RS232 mutual conversion chip U1, the negative electrode of a diode D1 is connected to the TTL sending pin 12 of the TTL / RS232 mutual conversion chip U1, and the negative electrode of a diode D2 is connected to the TTL sending pin 9 of the TTL / RS232 mutual conversion chip U1. Among them, the communication protocol of the touch screen and the communication protocol of the computer are both RS232 communication protocols, and the TTL / RS232 mutual conversion chip U1 is a MAX3232 conversion chip.

[0028] Among them, the capacitor C3 is connected between the pin 1 and the pin 3 of the TTL / RS232 mutual conversion chip U1, the capacitor C5 is connected between the pin 4 and the pin 5 of the TTL / RS232 mutual conversion chip U1, the TTL receiving pins 10-11 of the TTL / RS232 mutual conversion chip U1 are connected with the laser signal sending circuit 4 respectively, the pin 15 of the TTL / RS232 mutual conversion chip U1 is grounded, the pin 6 of the TTL / RS232 mutual conversion chip U1 is grounded through the capacitor C6, the RS232 signal receiving pin 8 and the RS232 signal sending pin 7 of the TTL / RS232 mutual conversion chip U1 are connected with the touch screen interface 2 respectively, the RS232 signal receiving pin 13 and the RS232 signal sending pin 14 of the TTL / RS232 mutual conversion chip U1 are connected with the intelligent device interface 3 respectively, the pin 16 of the TTL / RS232 mutual conversion chip U1 is connected with one end of the capacitor C2 and the VCC power supply respectively, the other end of the capacitor C2 is grounded, and the pin 2 of the TTL / RS232 mutual conversion chip U1 is grounded through the capacitor C1.

[0029] The laser signal sending circuit 4 comprises a fiber sending head F1, the pins 5-6 of the fiber sending head F1 are connected with the excimer laser respectively, the pin 2 of the fiber sending head F1 is grounded, the pin 3 of the fiber sending head F1 is connected with the VCC power supply, the pin 1 of the fiber sending head F1 is connected with the pin 4 of the fiber sending head F1, one end of the resistor R2 and one end of the capacitor C4 respectively, the other end of the capacitor C4 is grounded, the other end of the resistor R2 is connected with the base of the triode T1, the collector of the triode T1 is connected with the TTL receiving pin 10-11 of the TTL / RS232 mutual conversion chip U1 and one end of the resistor R1 respectively, the other end of the resistor R1 is connected with the VCC power supply, the emitter of the triode T1 is grounded.

[0030] In the TTL / RS232 mutual conversion circuit, the TTL receiving pin 10-11 of the TTL / RS232 mutual conversion chip U1 receiving the TTL signal of the excimer laser is short-circuited and connected with the collector of the triode T1 in the laser signal sending circuit 4. When the excimer laser sends data to the touch screen or the computer end, the excimer laser sends data through the fiber sending head F1 of the laser signal sending circuit 4, at this time, the triode T1 is turned on and sends the TTL signal data of the excimer laser to the TTL / RS232 mutual conversion chip U1, the TTL / RS232 mutual conversion chip U1 converts the TTL communication signal data into RS232 communication signal data and sends them to the touch screen through the touch screen interface 2 for display and to the computer end through the intelligent device interface 3 for display, the transmission of the feedback signal data of the excimer laser to the touch screen or the computer end is normal.

[0031] In the embodiment one, when the communication circuit is in the idle state, the TTL sending pin 12 and the TTL sending pin 9 of the TTL / RS232 mutual conversion chip U1 are both high level, under the isolation of the switching diode D1 and the switching diode D2, the levels of the TTL sending pin 12 and the TTL sending pin 9 do not affect each other, the triode T2 of the optical signal receiving circuit 5 is turned on, the fiber receiving head F2 emits light, which represents the logic true; when one of the TTL sending pin 12 and the TTL sending pin 9 is low level, the RXD signal sent by the TTL / RS232 mutual conversion chip U1 is pulled low, at this time, the triode T2 is cut off, the fiber receiving head F2 is extinguished, which represents the logic false. Therefore, the time-sharing signal transmission between the touch screen, the RS232 communication protocol computer end and the laser can be successfully realized, and the function of the double serial port single protocol time-sharing control excimer laser is realized.

[0032] Embodiment two: the specific circuit connection structure is as follows Figures 4-5As shown, the communication circuit is provided with two communication signal mutual conversion circuits 1, one of which is a TTL / RS232 communication signal mutual conversion circuit for mutual conversion of the excimer laser TTL communication signal and the touch screen RS232 communication signal, and the other is a TTL / RS485 communication signal mutual conversion circuit for mutual conversion of the excimer laser TTL communication signal and the intelligent device RS485 communication signal. The touch screen interface 2 is connected with the TTL / RS232 communication signal mutual conversion circuit, the intelligent device interface 3 is connected with the TTL / RS485 communication signal mutual conversion circuit, and the laser signal sending circuit 4 is connected with the TTL / RS232 communication signal mutual conversion circuit and the TTL / RS485 communication signal mutual conversion circuit respectively. The TTL / RS232 communication signal mutual conversion circuit comprises a TTL / RS232 mutual conversion chip U1, and the TTL / RS485 communication signal mutual conversion circuit comprises a TTL / RS485 mutual conversion chip U2. The negative electrode end of a diode D1 is connected with a TTL sending pin 9 of the TTL / RS232 mutual conversion chip U1, and the negative electrode end of a diode D2 is connected with a TTL sending pin 1 of the TTL / RS485 mutual conversion chip U2. The touch screen communication protocol is an RS232 communication protocol, and the computer end communication protocol is an RS485 communication protocol.

[0033] A capacitor C3 is connected between a pin 1 and a pin 3 of the TTL / RS232 mutual conversion chip U1, a capacitor C5 is connected between a pin 4 and a pin 5 of the TTL / RS232 mutual conversion chip U1, a TTL receiving pin 10 of the TTL / RS232 mutual conversion chip U1 is connected with the laser signal sending circuit 4, a pin 15 of the TTL / RS232 mutual conversion chip U1 is grounded, a pin 6 of the TTL / RS232 mutual conversion chip U1 is grounded through a capacitor C6, an RS232 signal receiving pin 8 and an RS232 signal sending pin 7 of the TTL / RS232 mutual conversion chip U1 are connected with the touch screen interface 2 respectively, a pin 16 of the TTL / RS232 mutual conversion chip U1 is connected with one end of a capacitor C2 and a VCC power supply respectively, the other end of the capacitor C2 is grounded, and a pin 2 of the TTL / RS232 mutual conversion chip U1 is grounded through a capacitor C1.

[0034] The pin 2 of the TTL / RS485 mutual conversion chip U2 is connected with the pin 3 of the TTL / RS485 mutual conversion chip U2, one end of the resistor R7 and the collector of the triode T3 respectively, the other end of the resistor R7 is connected with the VCC power supply, the base of the triode T3 is connected with the laser signal sending circuit 4 through the resistor R6, the emitter of the triode T3 is grounded, the pin 4 of the TTL / RS485 mutual conversion chip U2 is grounded, the pin 5 of the TTL / RS485 mutual conversion chip U2 is grounded, the pin 6 of the TTL / RS485 mutual conversion chip U2 is connected with one end of the resistor R8, one end of the TVS diode D5, one end of the TVS diode D4 and the pin 2 of the common mode inductor L1 respectively, the other end of the resistor R8 is connected with the VCC power supply, the other end of the TVS diode D5 is grounded, the other end of the TVS diode D4 is connected with the pin 7 of the TTL / RS485 mutual conversion chip U2, one end of the resistor R10, one end of the TVS diode D3 and the pin 1 of the common mode inductor L1 respectively, the other end of the resistor R10 is grounded, the other end of the TVS diode D3 is grounded, the pin 3 of the common mode inductor L1 is connected with the pin 1 of the discharge tube GDT1, one end of the resistor R9 and the intelligent device interface 3 respectively, the pin 4 of the common mode inductor L1 is connected with the pin 2 of the discharge tube GDT1, the other end of the resistor R9 and the intelligent device interface 3 respectively, the pin 3 of the discharge tube GDT1 is connected with one end of the capacitor C8 and one end of the resistor R11 respectively, the other end of the capacitor C8 and the other end of the resistor R11 are grounded respectively, the pin 3 of the discharge tube GDT1 is grounded, the pin 8 of the TTL / RS485 mutual conversion chip U2 is connected with one end of the capacitor C7 and the VCC power supply respectively, the other end of the capacitor C7 is grounded. The common mode inductor L1 plays a role in filtering electromagnetic interference signals, and the discharge tube GDT1 plays a role in high voltage protection.

[0035] The laser signal sending circuit 4 comprises a fiber sending head F1, the pins 5-6 of the fiber sending head F1 are connected with the excimer laser respectively, the pin 2 of the fiber sending head F1 is grounded, the pin 3 of the fiber sending head F1 is connected with the VCC power supply, the pin 1 of the fiber sending head F1 is connected with the pin 4 of the fiber sending head F1, one end of the resistor R2 and one end of the capacitor C4 respectively, the other end of the capacitor C4 is grounded, the other end of the resistor R2 is connected with the base of the triode T1, the collector of the triode T1 is connected with the TTL receiving pin 10 of the TTL / RS232 mutual conversion chip U1, one end of the resistor R1 and the resistor R6 of the TTL / RS485 communication signal mutual conversion circuit respectively, the other end of the resistor R1 is connected with the VCC power supply, the emitter of the triode T1 is grounded.

[0036] The TTL / RS232 mutual conversion chip U1 in the TTL / RS232 mutual conversion circuit in the second embodiment is a MAX232 mutual conversion chip, and the TTL / RS485 mutual conversion chip U2 in the TTL / RS485 mutual conversion circuit is a MAX485 mutual conversion chip. In the MAX485 mutual conversion chip, the pin 2 and the pin 3 are used to select the transmission and reception modes of the chip. In general cases, a GPIIO pin of the central control MCU is needed to control the transmission and reception modes. In the present embodiment, the transmission and reception modes are controlled by the triode T3.

[0037] When the excimer laser sends data to the touch screen or the computer, the excimer laser sends the data through the optical fiber sending head F1 of the laser signal sending circuit 4. At this time, the triode T1 is turned on and sends the excimer laser TTL signal data to the TTL / RS232 mutual conversion chip U1 and the TTL / RS485 mutual conversion chip U2. The TTL / RS232 mutual conversion chip U1 converts the TTL communication signal data into RS232 communication signal data and sends the data to the touch screen through the touch screen interface 2 for display. The TTL / RS485 mutual conversion chip U2 converts the TTL communication signal data into RS485 communication signal data and sends the data to the computer through the intelligent device interface 3 for display. The excimer laser sends the feedback signal data to the touch screen or the computer normally.

[0038] In the second embodiment, the switch diode D1 and the switch diode D2 play an isolating role, so that the TTL sending pin 9 of the TTL / RS232 mutual conversion chip U1 and the TTL sending pin 1 of the TTL / RS485 mutual conversion chip U2 do not affect each other. When the TTL sending pin 9 of the TTL / RS232 mutual conversion chip U1 and the TTL sending pin 1 of the TTL / RS485 mutual conversion chip U2 are both at a low level, the RXD signal is pulled low. At this time, the triode T2 is cut off, and the optical fiber receiving head F2 is extinguished, representing a logic false.

[0039] In the second embodiment, when the communication circuit is in a communication idle state, the optical fiber head F1 of the laser signal sending circuit 4 receives light at this time. The triode T1 is in a cut-off state, and the TXD is at a high level. At this time, the base of the triode T3 is at a high level, the triode T3 is turned on, the pins 2 and 3 of the TTL / RS485 mutual conversion chip U2, i.e. the DE pin and the RE pin, are at a low level at this time, and the TTL / RS485 mutual conversion chip U2 is in a receiving state. The voltage across the 10-kilohm resistor R6 is about 3.6V, and the voltage at the T2IN pin of the TTL / RS232 mutual conversion chip U1 is also about 3.6V and remains at a high level. At this time, the touch screen of the RS232 communication protocol and the computer of the RS485 communication protocol can normally communicate, thereby realizing the function of controlling the excimer laser by the double serial ports and the double protocols in a time-sharing manner.

[0040] In the case, the communication circuit further comprises a power supply circuit 6, the power supply circuit 6 comprises a DC socket PWR2.5, the pin 1 of the DC socket PWR2.5 is connected with the pin 4 of the common mode inductor L2, the pin 2-3 of the DC socket PWR2.5 is respectively connected with the pin 1 of the common mode inductor L2, the pin 3 of the common mode inductor L2 is respectively connected with one end of the capacitor C9, one end of the capacitor C12 and the pin 1 of the voltage reduction chip TMR1, the pin 2 of the common mode inductor L2, the other end of the capacitor C9, the other end of the capacitor C12 and the pin 2 of the voltage reduction chip TMR1 are grounded respectively, the pin 7 of the voltage reduction chip TMR1 is respectively connected with one end of the capacitor C10 and one end of the capacitor C11, the pin 5 of the voltage reduction chip TMR1, the other end of the capacitor C10 and the other end of the capacitor C11 are grounded respectively, the pin 1 of the voltage reduction chip TMR1 outputs VCC12V power supply, the pin 7 of the voltage reduction chip TMR1 outputs VCC power supply. In the first embodiment, the VCC12V power supply outputted by the power supply circuit 6 is connected with the touch screen interface 2 to supply power to the touch screen, the VCC power supply outputted by the power supply circuit 6 is respectively supplied to the TTL / RS232 communication signal mutual conversion circuit, the laser signal sending circuit 4 and the laser signal receiving circuit 5; in the second embodiment, the VCC12V power supply outputted by the power supply circuit 6 is connected with the touch screen interface 2 to supply power to the touch screen, the VCC power supply outputted by the power supply circuit 6 is respectively supplied to the TTL / RS232 communication signal mutual conversion circuit, the TTL / RS485 communication signal mutual conversion circuit, the laser signal sending circuit 4 and the laser signal receiving circuit 5.

[0041] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application, any equivalent structural transformation made under the inventive concept of the present application, or direct or indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A communication circuit for a dual-serial-port time-division controlled excimer laser, characterized in that: The communication signal mutual conversion circuit (1) is connected with the touch screen interface (2) for communication with the touch screen, the smart device interface (3) connected with the smart device, the laser signal sending circuit (4) connected with the excimer laser for sending communication signals, and the laser signal receiving circuit (5) connected with the excimer laser for receiving communication signals. The communication circuit further comprises a power supply circuit (6), and the power supply circuit (6) comprises a DC socket PWR2.5, the pin 1 of the DC socket PWR2.5 is connected with the pin 4 of the common mode inductor L2, the pins 2-3 of the DC socket PWR2.5 are respectively connected with the pin 1 of the common mode inductor L2, the pin 3 of the common mode inductor L2 is respectively connected with one end of the capacitor C9, one end of the capacitor C12 and the pin 1 of the step-down chip TMR1, the pin 2 of the common mode inductor L2, the other end of the capacitor C9, the other end of the capacitor C12 and the pin 2 of the step-down chip TMR1 are grounded, the pin 7 of the step-down chip TMR1 is respectively connected with one end of the capacitor C10 and one end of the capacitor C11, the pin 5 of the step-down chip TMR1, the other end of the capacitor C10 and the other end of the capacitor C11 are grounded, the pin 1 of the step-down chip TMR1 outputs a VCC12V power supply, and the pin 7 of the step-down chip TMR1 outputs a VCC power supply. The communication circuit is provided with a communication signal mutual conversion circuit (1), the communication signal mutual conversion circuit (1) is a TTL / RS232 communication signal mutual conversion circuit for mutual conversion of the excimer laser TTL communication signal and the touch screen RS232 communication signal, and mutual conversion of the excimer laser TTL communication signal and the smart device RS232 communication signal, the TTL / RS232 communication signal mutual conversion circuit comprises a TTL / RS232 mutual conversion chip U1, the negative electrode of the diode D1 is connected with the TTL sending pin 12 of the TTL / RS232 mutual conversion chip U1, and the negative electrode of the diode D2 is connected with the TTL sending pin 9 of the TTL / RS232 mutual conversion chip U1.

2. The communication circuit for a dual-serial-port time-division controlled excimer laser according to claim 1, characterized in that: The TTL / RS232 mutual conversion chip U1 pin 1 and pin 3 are connected with the capacitor C3, the TTL / RS232 mutual conversion chip U1 pin 4 and pin 5 are connected with the capacitor C5, the TTL receiving pin 10-11 of the TTL / RS232 mutual conversion chip U1 is connected with the laser signal sending circuit (4), the TTL / RS232 mutual conversion chip U1 pin 15 is grounded, the TTL / RS232 mutual conversion chip U1 pin 6 is grounded through the capacitor C6, the RS232 signal receiving pin 8 and RS232 signal sending pin 7 of the TTL / RS232 mutual conversion chip U1 are connected with the touch screen interface (2) respectively, the RS232 signal receiving pin 13 and RS232 signal sending pin 14 of the TTL / RS232 mutual conversion chip U1 are connected with the intelligent device interface (3) respectively, the TTL / RS232 mutual conversion chip U1 pin 16 is connected with the capacitor C2 one end and VCC power supply respectively, the other end of the capacitor C2 is grounded, the TTL / RS232 mutual conversion chip U1 pin 2 is grounded through the capacitor C1.

3. The communication circuit for a dual serial port time-division controlled excimer laser according to claim 2, characterized in that: The laser signal sending circuit (4) includes the optical fiber sending head F1, the optical fiber sending head F1 pin 5-6 is connected with the excimer laser respectively, the optical fiber sending head F1 pin 2 is grounded, the optical fiber sending head F1 pin 3 is connected with the VCC power supply, the optical fiber sending head F1 pin 1 is connected with the optical fiber sending head F1 pin 4, the resistor R2 one end and the capacitor C4 one end respectively, the other end of the capacitor C4 is grounded, the other end of the resistor R2 is connected with the base of the triode T1, the collector of the triode T1 is connected with the TTL receiving pin 10-11 of the TTL / RS232 mutual conversion chip U1 and the resistor R1 one end respectively, the other end of the resistor R1 is connected with the VCC power supply, the emitter of the triode T1 is grounded.

4. The communication circuit of claim 1, wherein: the first communication port is a RS-232 port; and the second communication port is a RS-485 port. The communication circuit is provided with two communication signal mutual conversion circuits (1), one of which is a TTL / RS232 communication signal mutual conversion circuit for converting the excimer laser TTL communication signal and the touch screen RS232 communication signal, the other is a TTL / RS485 communication signal mutual conversion circuit for converting the excimer laser TTL communication signal and the intelligent device RS485 communication signal, the touch screen interface (2) is connected with the TTL / RS232 communication signal mutual conversion circuit, the intelligent device interface (3) is connected with the TTL / RS485 communication signal mutual conversion circuit, the laser signal sending circuit (4) is connected with the TTL / RS232 communication signal mutual conversion circuit and the TTL / RS485 communication signal mutual conversion circuit respectively, the TTL / RS232 communication signal mutual conversion circuit includes the TTL / RS232 mutual conversion chip U1, the TTL / RS485 communication signal mutual conversion circuit includes the TTL / RS485 mutual conversion chip U2, the diode D1 negative pole is connected with the TTL sending pin 9 of the TTL / RS232 mutual conversion chip U1, the diode D2 negative pole is connected with the TTL sending pin 1 of the TTL / RS485 mutual conversion chip U2.

5. The communication circuit for a dual-serial-port time-division controlled excimer laser according to claim 4, characterized in that: The capacitor C3 is connected between the pin 1 and the pin 3 of the TTL / RS232 mutual conversion chip U1, the capacitor C5 is connected between the pin 4 and the pin 5 of the TTL / RS232 mutual conversion chip U1, the TTL receiving pin 10 of the TTL / RS232 mutual conversion chip U1 is connected with the laser signal sending circuit (4), the pin 15 of the TTL / RS232 mutual conversion chip U1 is grounded, the pin 6 of the TTL / RS232 mutual conversion chip U1 is grounded through the capacitor C6, the RS232 signal receiving pin 8 and the RS232 signal sending pin 7 of the TTL / RS232 mutual conversion chip U1 are connected with the touch screen interface (2) respectively, the pin 16 of the TTL / RS232 mutual conversion chip U1 is connected with one end of the capacitor C2 and the VCC power supply respectively, the other end of the capacitor C2 is grounded, and the pin 2 of the TTL / RS232 mutual conversion chip U1 is grounded through the capacitor C1.

6. The communication circuit of claim 5, wherein: the first communication port is a RS-232 port; and the second communication port is a RS-485 port. The pin 2 of the TTL / RS485 mutual conversion chip U2 is connected with the pin 3 of the TTL / RS485 mutual conversion chip U2, one end of the resistor R7 and the collector of the triode T3 respectively, the other end of the resistor R7 is connected with the VCC power supply, the base of the triode T3 is connected with the laser signal sending circuit (4) through the resistor R6, the emitter of the triode T3 is grounded, the pin 4 of the TTL / RS485 mutual conversion chip U2 is grounded, the pin 5 of the TTL / RS485 mutual conversion chip U2 is grounded, the pin 6 of the TTL / RS485 mutual conversion chip U2 is connected with one end of the resistor R8, one end of the TVS diode D5, one end of the TVS diode D4 and the pin 2 of the common mode inductor L1 respectively, the other end of the resistor R8 is connected with the VCC power supply, the other end of the TVS diode D5 is grounded, the other end of the TVS diode D4 is connected with the pin 7 of the TTL / RS485 mutual conversion chip U2, one end of the resistor R10, one end of the TVS diode D3 and the pin 1 of the common mode inductor L1 respectively, the other end of the resistor R10 is grounded, the other end of the TVS diode D3 is grounded, the pin 3 of the common mode inductor L1 is connected with the pin 1 of the discharge tube GDT1, one end of the resistor R9 and the intelligent device interface (3) respectively, the pin 4 of the common mode inductor L1 is connected with the pin 2 of the discharge tube GDT1, the other end of the resistor R9 and the intelligent device interface (3) respectively, one end of the capacitor C8 and one end of the resistor R11 are connected with the pin 3 of the discharge tube GDT1, the other end of the capacitor C8 and the other end of the resistor R11 are grounded respectively, the pin 3 of the discharge tube GDT1 is grounded, one end of the capacitor C7 and the VCC power supply are connected with the pin 8 of the TTL / RS485 mutual conversion chip U2, and the other end of the capacitor C7 is grounded.

7. The communication circuit of claim 6, wherein: the first communication port is a RS-232 port; and the second communication port is a RS-485 port. The laser signal transmitting circuit (4) comprises a fiber transmitting head F1, the pins 5-6 of the fiber transmitting head F1 are connected with excimer lasers respectively, the pin 2 of the fiber transmitting head F1 is grounded, the pin 3 of the fiber transmitting head F1 is connected with a VCC power supply, the pin 1 of the fiber transmitting head F1 is connected with the pin 4 of the fiber transmitting head F1, one end of a resistor R2 and one end of a capacitor C4 respectively, the other end of the capacitor C4 is grounded, the other end of the resistor R2 is connected with a base of a triode T1, a collector of the triode T1 is connected with a TTL receiving pin 10 of a TTL / RS232 mutual conversion chip U1, a resistor R6 of a TTL / RS485 communication signal mutual conversion circuit and one end of a resistor R1 respectively, the other end of the resistor R1 is connected with the VCC power supply, an emitter of the triode T1 is grounded.

8. The communication circuit of claim 1, wherein: the first serial port is a RS-232 port; and the second serial port is a RS-485 port. The intelligent device is a computer.

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