An integrated three-way DA conversion circuit control system for laser marking control

Abstract

The invention provides an integrated three-way DA conversion circuit control system for laser marking control, comprising a simple horn socket J1, a detection signal unit, an optical coupling isolation unit, a DA conversion unit and an operational amplifier unit; the simple horn socket J1 is connected with the detection signal unit and the optical coupling isolation unit; the detection signal unit and the optical coupling isolation unit are respectively connected with the DA conversion unit, and the DA conversion unit is connected with the operational amplifier unit; the simple horn socket J1 is configured to receive a control signal and output a differential serial transmission signal to the detection signal unit and the optical coupling isolation unit; the differential serial transmission signal comprises a clock signal, a synchronization signal, an X-axis control signal, a Y-axis control signal and a Z-axis control signal; the system is provided with a detection signal unit, which can prejudge the control signal, thereby avoiding the problem of laser random marking caused by the deflection of each motor to the maximum or minimum position and the instantaneous reaching of the limit position by the laser.

Description

Technical Field

[0001] The invention relates to the technical field of marking machines, and in particular to an integrated three-way DA conversion circuit control system for laser marking control. Background Art

[0002] In the prior art, the control circuit of the laser marking machine is not provided with a detection signal circuit, so that when the control signals of the three motors in the x-axis direction, y-axis direction and z-axis direction of the marking machine are disconnected, the transmitting end and the receiving end are disturbed by electromagnetic waves, electricity and signals, and the output value of the DA conversion circuit will be output to the maximum or minimum in an instant, causing each motor to deflect to the maximum or minimum position under control, so that the laser at this moment is instantly hit to the limit position, resulting in the phenomenon of laser random shooting. In addition, in the prior art, the DA conversion cards of the xyz axis of the marking machine are separately controlled by three control motors, and the three DA conversion cards cannot be integrated together, the circuit connection is more complicated, and the use is more inconvenient.

[0003] For example, Chinese patent publication number CN204712667U discloses a desktop electromagnetic marking machine, including a marking head and a controller, the marking head is communicatively connected with the controller, the marking head includes a working platform, a column, a lifting platform, an X-axis linear guide, a Y-axis linear guide and an electromagnetic marking head, a hand wheel is provided on the top of the column, a mounting portion is provided at the front end of the lifting platform, the controller includes a box body, a 24V power supply is provided on the left side of the box body, a main board is provided in the middle position inside the box body, an X-axis drive card, a Y-axis drive card and a Z-axis drive card are provided on the right side of the box body from top to bottom, a display screen is provided in the middle of the front end surface of the box body, a plurality of indicator lights are provided on the left side of the front end surface of the box body from top to bottom, an emergency stop button is provided on the right side of the front end surface of the box body, and an X / Y axis interface, a Z axis interface, a lighting switch and a power interface are provided on the rear end surface of the box body. It can be seen from this that this patent sets up independent X-axis drive card, Y-axis drive card and Z-axis drive card, and the three DA conversion cards are not integrated together, the circuit connection is cumbersome and inconvenient to use; and there is no detection signal circuit.

[0004] For another example, Chinese patent publication number CN201227887 discloses a large-format laser marking machine, including a frame, a computer control system and a laser. The computer control system is fixedly connected to the frame and also includes an X-direction drive mechanism and a Y-direction drive mechanism. The computer control system includes a marking control unit, an X-direction control unit and a Y-direction control unit. The X-direction control unit of the computer control system controls the X-direction drive mechanism to move along the X direction, the Y-direction control unit controls the Y-direction drive mechanism to move along the Y direction, and the marking control unit controls the laser marking. The laser marking machine disclosed in the patent, the movement of its X-direction or Y-direction drive mechanism is controlled by an independent X-direction control unit and a Y-direction control unit respectively, and also has the above-mentioned problems.

[0005] Therefore, in view of the problems existing in the prior art, it is particularly important to provide a laser marking circuit control system with a detection signal circuit and an integrated three-way DA conversion chip. Summary of the invention

[0006] The purpose of the present invention is to avoid the shortcomings of the prior art and provide an integrated three-way DA conversion circuit control system for laser marking control, the system is provided with a detection signal unit, which can pre-judge the control signal, thereby avoiding the problem of laser random marking caused by the motors of each road deflecting to the maximum or minimum position and the laser reaching the limit position instantly. In addition, the DA conversion unit integrates the DA conversion chips that control the XYZ axes respectively, making the circuit connection more convenient, reducing the space of circuit design, and easy to use.

[0007] The purpose of the present invention is achieved by the following technical solutions:

[0008] An integrated three-way DA conversion circuit control system for laser marking control, used for laser marking equipment, the circuit control system adopts the xy2-100 protocol; the system includes a simple horn socket J1, a detection signal unit, an optical coupling isolation unit, a DA conversion unit and an operational amplifier unit;

[0009] The simple horn socket J1 is connected to the detection signal unit and the optical coupling isolation unit; the detection signal unit and the optical coupling isolation unit are respectively connected to the DA conversion unit, and the DA conversion unit is connected to the operational amplifier unit;

[0010] The simple bull-horn socket J1 is configured to receive a control signal and output a differential serial transmission signal to a detection signal unit and an optical coupling isolation unit;

[0011] The differential serial transmission signal includes five groups of signals, namely a clock signal, a synchronization signal, an X-axis control signal, a Y-axis control signal and a Z-axis control signal;

[0012] Specifically, the simple bull-horn socket J1 is used as an incoming line connector to connect signals and power supplies, etc.

[0013] The detection signal unit is configured to receive a synchronization signal from the simple bull-horn socket J1, and determine whether the control signal is disconnected. When the control signal is disconnected, the detection signal unit sends a clear (reset) signal to the DA conversion unit to power off the DA conversion unit;

[0014] Specifically, a detection signal unit is provided before the DA conversion unit, and whether the signal is normal or disconnected can be determined by signal judgment and rectification. If it is abnormal, the DA intermediate value is output, so that the output will not be maximum or minimum at an instant, and the motor can be kept from swinging randomly. The problem in the prior art that the output value of the DA conversion circuit will be output to the maximum or minimum at an instant due to signal disconnection is solved, causing each motor to deflect to the maximum or minimum position under control, so that the laser at this moment will instantly hit the extreme position, resulting in the phenomenon of laser randomly hitting.

[0015] The optical coupling isolation unit is configured to receive a differential serial transmission signal from the simple horn socket J1 and output it to the DA conversion unit;

[0016] In the above, the optical coupling isolation unit includes a first photocoupler E1, a second photocoupler E2 and a third photocoupler E3; the first photocoupler E1 is configured to receive a clock signal and a synchronization signal; the second photocoupler E2 is configured to receive an X-axis control signal and a Y-axis control signal; the third photocoupler E3 is configured to receive a Z-axis control signal;

[0017] Specifically, the setting of the optocoupler isolation unit isolates the upper and lower levels of the circuit to reduce electromagnetic interference, electrical interference, signal interference and other problems.

[0018] The DA conversion unit is configured to receive a reset signal from the detection signal unit; when the DA conversion unit receives the reset signal, the DA conversion unit is powered off and stops working;

[0019] The DA conversion unit is configured to receive the differential serial transmission signal from the optical coupling isolation unit, convert it into an analog signal and output it to the operational amplifier unit;

[0020] The DA conversion unit includes a first DA conversion chip U5, a second DA conversion chip U6 and a third DA conversion chip U7; the first DA conversion chip U5 is configured to receive a synchronization signal, a clock signal, an X-axis control signal and a reset signal; the second DA conversion chip U6 is configured to receive a synchronization signal, a clock signal, a Y-axis control signal and a reset signal; the third DA conversion chip U7 is configured to receive a synchronization signal, a clock signal, a Z-axis control signal and a reset signal;

[0021] The operational amplifier unit is configured to receive the analog signal from the DA conversion unit, and output the analog signal after operational amplification;

[0022] The operational amplifier unit includes a first operational amplifier U8 and a second operational amplifier U9; the first operational amplifier U8 is configured to receive analog signals from a first DA conversion chip U5 and a second DA conversion chip U6; the second operational amplifier U9 is configured to receive analog signals from a third DA conversion chip U7.

[0023] In the above, the analog signal voltage output by the DA conversion unit is ±5V, and the operational amplifier unit amplifies the ±5V voltage to ±10V voltage.

[0024] Specifically, the analog signal output by the DA conversion unit has low voltage and current and low driving capability, and the analog signal is amplified by the operational amplifier unit to obtain a stronger output voltage and amplified current.

[0025] In some embodiments, the model of the simple bull-horn socket J1 is DC3-2*13P, and the simple bull-horn socket J1 has twenty-six pins, namely the first pin, the second pin...the Nth pin, where N=26; its first pin and the second pin are used to transmit the clock signal; its third pin and the fourth pin are used to transmit the synchronization signal; its fifth pin and the sixth pin are used to transmit the X-axis control signal; its seventh pin and the eighth pin are used to transmit the Y-axis control signal; its ninth pin and the tenth pin are used to transmit the Z-axis control signal.

[0026] In some embodiments, the detection signal unit includes a high-speed optical coupler E4, four diodes D11, D12, D13, and D14, resistors R3 and R4, and a capacitor C1; the high-speed optical coupler E4 has five pins, namely, a first pin, a second pin, a third pin, a fourth pin, and a fifth pin;

[0027] The diodes D11 and D12 are connected in series, and D13 and D14 are connected in series and then in parallel. The resistor R3 is connected to one end of the parallel D11 and D13; the second pin of the high-speed optical coupler E4 is connected to one end of the parallel D12 and D14; the first pin of the high-speed optical coupler E4 is connected to the other end of the resistor R3; the capacitor C1 is connected in parallel to the first pin and the second pin of the high-speed optical coupler E4; the third pin of the high-speed optical coupler E4 is grounded, the fourth pin of the high-speed optical coupler E4 is connected to the resistor R4, and the other end of the resistor R4 is connected to the DA conversion unit, so that the detection signal unit transmits a reset signal to the DA conversion unit; the fifth pin of the high-speed optical coupler E4 is connected to the power supply VCC; the third pin of the simple bull horn socket J1 is connected to the cathode of the diode D12, and the fourth pin of the simple bull horn socket J1 is connected to the cathode of the diode D14, so that the synchronization signal is transmitted from the simple bull horn socket to the detection signal unit.

[0028] Preferably, the model of the high-speed optical coupler E4 is TLP2745, and the models of the diodes D11, D12, D13, and D14 are all IN4148.

[0029] In some embodiments, the optical coupling isolation unit includes a first photocoupler E1, a second photocoupler E2 and a third photocoupler E3; the first photocoupler E1, the second photocoupler E2 and the third photocoupler E3 each have eight pins, namely a first pin, a second pin, ..., an Mth pin, where M=8;

[0030] In the above, the first pin and the second pin of the first photocoupler E1 are respectively connected to the fourth pin and the third pin of the simple bull horn socket J1, so that the first photocoupler E1 receives the synchronization signal from the simple bull horn socket J1;

[0031] The third pin and the fourth pin of the first photocoupler E1 are respectively connected to the first pin and the second pin of the simple horn socket J1, so that the first photocoupler E1 receives the clock signal from the simple horn socket J1;

[0032] The fifth pin of the first photocoupler E1 is grounded, and the eighth pin is connected to the power supply VCC;

[0033] The seventh pin of the first photocoupler E1 is connected to the DA conversion unit, and is used to transmit the synchronization signal to the DA conversion unit;

[0034] The sixth pin of the first photocoupler E1 is connected to the DA conversion unit and is used to transmit the clock signal to the DA conversion unit;

[0035] In the above, the first pin and the second pin of the second photocoupler E2 are respectively connected to the seventh pin and the eighth pin of the simple horn socket J1, so that the second photocoupler E2 receives the Y-axis control signal from the simple horn socket J1;

[0036] The third pin and the fourth pin of the second photocoupler E2 are respectively connected to the sixth pin and the fifth pin of the simple horn socket J1, so that the second photocoupler E2 receives the X-axis control signal from the simple horn socket J1;

[0037] The fifth pin of the second photocoupler E2 is grounded, and the eighth pin is connected to the power supply VCC;

[0038] The seventh pin of the second photocoupler E2 is connected to the DA conversion unit, and is used to transmit the Y-axis control signal to the DA conversion unit;

[0039] The sixth pin of the second photoelectric coupler E2 is connected to the DA conversion unit, and is used to transmit the X-axis control signal to the DA conversion unit;

[0040] In the above, the third pin and the fourth pin of the third photocoupler E3 are respectively connected to the tenth pin and the ninth pin of the simple horn socket J1, so that the third photocoupler E3 receives the Z-axis control signal from the simple horn socket J1;

[0041] The fifth pin of the third photocoupler E3 is grounded, and the eighth pin is connected to the power supply VCC;

[0042] The sixth pin of the third photoelectric coupler E3 is connected to the DA conversion unit for transmitting the Z-axis control signal to the DA conversion unit.

[0043] Preferably, the models of the first photoelectric coupler E1, the second photoelectric coupler E2 and the third photoelectric coupler E3 are all HCPL0631.

[0044] In some embodiments, the DA conversion unit includes a first DA conversion chip U5, a second DA conversion chip U6 and a third DA conversion chip U7; the first DA conversion chip U5, the second DA conversion chip U6 and the third DA conversion chip U7 each have ten pins, namely, REF, CS, SCLK, DIN, CLR, VOUT, INV, RFB, VDD and GND pins;

[0045] In the above, the REF and GND pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all grounded; the VDD pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the power supply VCC;

[0046] The CS pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the optical coupling isolation unit to receive the synchronization signal from the optical coupling isolation unit;

[0047] The SCLK pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the optical coupling isolation unit to receive the clock signal from the optical coupling isolation unit;

[0048] The CLR pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the detection signal unit, for receiving the reset signal from the optical coupling isolation unit;

[0049] The VOUT, INV and RFB pins of the first DA conversion chip U5, the second DA conversion chip U6 and the third DA conversion chip U7 are all connected to the operational amplifier unit for transmitting analog signals;

[0050] The DIN pin of the first DA conversion chip U5 is connected to the optical coupling isolation unit, so as to receive the X-axis control signal from the optical coupling isolation unit;

[0051] The DIN pin of the second DA conversion chip U6 is connected to the optical coupling isolation unit, so as to receive the Y-axis control signal from the optical coupling isolation unit;

[0052] The DIN pin of the third DA conversion chip U7 is connected to the optical coupling isolation unit, and is used to receive the Z-axis control signal from the optical coupling isolation unit.

[0053] Preferably, the models of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all LTC2642IMS.

[0054] In some embodiments, the operational amplifier unit includes a first operational amplifier U8 and a second operational amplifier U9;

[0055] The first operational amplifier U8 includes OUT1, -IN1, +IN1, VCC, +IN2, -IN2, OUT2, OUT3, -IN3, +IN3, VEE, +IN4, -IN4, OUT4 pins;

[0056] The OUT1 pin of the first operational amplifier U8 is connected to the RFB pin of the first DA conversion chip U5, and the -IN1 and +IN1 pins of U8 are respectively connected to the INV and VOUT pins of U5; so that the first operational amplifier U8 receives the analog signal of the first DA conversion chip U5;

[0057] The OUT4 pin of the first operational amplifier U8 is connected to the RFB pin of the second DA conversion chip U6, and the -IN4 and +IN4 pins of U8 are respectively connected to the INV and VOUT pins of U6; so that the first operational amplifier U8 receives the analog signal of the second DA conversion chip U6;

[0058] The VCC pin of the first operational amplifier U8 is connected to a +15V voltage, and the VEE pin of U8 is connected to a -15V voltage;

[0059] The OUT3 pin of the first operational amplifier U8 is connected to the -IN3 pin of U8, and is used to transmit the analog signal of the first DA conversion chip U5 after the analog signal is operationally amplified;

[0060] The OUT2 pin of the first operational amplifier U8 is connected to the -IN2 pin of U8, and is used to transmit the analog signal of the second DA conversion chip U6 after the analog signal is operationally amplified;

[0061] The second operational amplifier U9 includes OUT1, -IN1, +IN1, VEE, +IN2, -IN2, OUT2, and VCC pins; the OUT1 pin of the second operational amplifier U9 is connected to the RFB pin of the third DA conversion chip U7, and the -IN1 and +IN1 pins of U9 are respectively connected to the INV and VOUT pins of U7; so that the second operational amplifier U9 receives the analog signal of the third DA conversion chip U7;

[0062] The VCC pin of the second operational amplifier U9 is connected to a +15V voltage, and the VEE pin of U9 is connected to a -15V voltage;

[0063] The OUT2 pin of the second operational amplifier U9 is connected to the -IN2 pin of U9, and is used to transmit the analog signal of the third DA conversion chip U7 after the analog signal is operationally amplified;

[0064] Preferably, the model of the first operational amplifier U8 is MC33079DT; the model of the second operational amplifier U9 is MC33078DT.

[0065] Beneficial effects of the present invention:

[0066] The circuit control system provided by the present invention is provided with a detection signal unit, which can pre-judge the control signal. If there is a signal disconnection, the detection signal unit sends a reset signal to the DA conversion unit to power off the DA conversion unit, thereby avoiding the problem of laser random shooting caused by the motors of each road being deflected to the maximum or minimum position and the laser reaching the limit position instantly; by setting an optical coupling isolation unit, the circuit is isolated from the upper and lower levels, and the electromagnetic wave interference, electrical interference and signal interference between the circuits are reduced. In addition, the DA conversion unit integrates the DA conversion chips that control the XYZ axes respectively, making the circuit connection more convenient and reducing the space of circuit design. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 A schematic diagram of circuit module connections for an integrated three-way DA conversion circuit control system provided by the present invention;

[0068] Figure 2 A schematic diagram of the circuit connection of a simple horn socket J1 of the integrated three-way DA conversion circuit control system provided by the present invention;

[0069] Figure 3 A circuit connection diagram of a detection circuit unit of an integrated three-way DA conversion circuit control system provided by the present invention;

[0070] Figure 4 A schematic diagram of the circuit connection of the optocoupler isolation unit of the integrated three-way DA conversion circuit control system provided by the present invention;

[0071] Figure 5 A partial circuit diagram of the integrated three-way DA conversion circuit control system provided by the present invention;

[0072] Figure 6 A schematic diagram of the connection between the DA conversion unit and the operational amplifier circuit of the integrated three-way DA conversion circuit control system provided by the present invention;

[0073] Figure 7 This is a schematic diagram of the structure of an integrated circuit board of the integrated three-way DA conversion circuit control system provided by the present invention. DETAILED DESCRIPTION

[0074] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0075] like Figures 1 to 7 As shown, this embodiment provides an integrated three-way DA conversion circuit control system for laser marking control, which is used for laser marking equipment, including a simple horn socket J1, a detection signal unit, an optical coupling isolation unit, a DA conversion unit and an operational amplifier unit;

[0076] The simple horn socket J1 is connected to the detection signal unit and the optical coupling isolation unit; the detection signal unit and the optical coupling isolation unit are respectively connected to the DA conversion unit, and the DA conversion unit is connected to the operational amplifier unit;

[0077] The simple bull-horn socket J1 is configured to receive a control signal and output a differential serial transmission signal to a detection signal unit and an optical coupling isolation unit;

[0078] The differential serial transmission signal includes five groups of signals, namely a clock signal CLK, a synchronization signal SYNC, an X-axis control signal XCH, a Y-axis control signal YCH and a Z-axis control signal ZCH;

[0079] The detection signal unit is configured to receive a synchronization signal SYNC from the simple bull-horn socket J1, and determine whether the control signal from the computer is disconnected. When the control signal is disconnected, the detection signal unit sends a clear (reset) signal CLR to the DA conversion unit to power off the DA conversion unit;

[0080] The optical coupling isolation unit is configured to receive differential serial transmission signals (SYNC, CLK, XCH, YCH, ZCH) from the simple horn socket J1 and output them to the DA conversion unit;

[0081] The DA conversion unit is configured to receive a clear signal CLR from the detection signal unit; when the DA conversion unit receives the clear signal CLR, the DA conversion unit is powered off and stops working;

[0082] The DA conversion unit is configured to receive the differential serial transmission signal (SYNC, CLK, XCH, YCH, ZCH) from the optical coupling isolation unit, convert it into an analog signal and output it to the operational amplifier unit;

[0083] The operational amplifier unit is configured to receive the analog signal from the DA conversion unit, and operationally amplify the analog signal and then output it.

[0084] In this embodiment, the analog signal voltage output by the DA conversion unit is ±5V, and the operational amplifier unit amplifies the ±5V voltage to ±10V voltage.

[0085] In this embodiment, the model of the simple bull-horn socket J1 is DC3-2*13P, and the simple bull-horn socket J1 has twenty-six pins, namely the first pin, the second pin...the Nth pin, where N=26; its first pin and the second pin are used to transmit the clock signal CLK; its third pin and the fourth pin are used to transmit the synchronization signal SYNC; its fifth pin and the sixth pin are used to transmit the X-axis control signal XCH; its seventh pin and the eighth pin are used to transmit the Y-axis control signal YCH; its ninth pin and the tenth pin are used to transmit the Z-axis control signal ZCH.

[0086] The detection signal unit includes a high-speed optical coupler E4, four diodes D11, D12, D13, and D14, resistors R3 and R4, and a capacitor C1; the model of the high-speed optical coupler E4 is TLP2745, and the high-speed optical coupler E4 has five pins, namely, a first pin, a second pin, a third pin, a fourth pin, and a fifth pin (i.e., corresponding to pins 1, 3, 4, 5, and 6 of TLP2745 shown in the figure, respectively); the models of the diodes D11, D12, D13, and D14 are all IN4148.

[0087] The diodes D11 and D12 are connected in series, and D13 and D14 are connected in series and then in parallel. The resistor R3 is connected to one end of the parallel D11 and D13; the second pin of the high-speed optical coupler E4 is connected to one end of the parallel D12 and D14; the first pin of the high-speed optical coupler E4 is connected to the other end of the resistor R3; the capacitor C1 is connected to the first pin and the second pin of the high-speed optical coupler E4 in parallel; the third pin of the high-speed optical coupler E4 is grounded, the fourth pin of the high-speed optical coupler E4 is connected to the resistor R4, and the other end of the resistor R4 is connected to the DA conversion unit, so that the detection signal unit transmits the clear signal CLR to the DA conversion unit (such as Figure 3 As shown, the fourth pin of E4 [pin 5 in the figure] is connected to the CLR pin of the DA conversion chip U5, U6, and U7); the fifth pin of the high-speed optical coupler E4 is connected to the power supply VCC;

[0088] The third pin of the simple horn socket J1 is connected to the cathode of the diode D12, and the fourth pin of the simple horn socket J1 is connected to the cathode of the diode D14, so that the synchronization signal SYNC is transmitted from the simple horn socket to the detection signal unit.

[0089] The optical coupling isolation unit includes a first photoelectric coupler E1, a second photoelectric coupler E2 and a third photoelectric coupler E3; the models of the first photoelectric coupler E1, the second photoelectric coupler E2 and the third photoelectric coupler E3 are all HCPL0631.

[0090] The first photocoupler E1, the second photocoupler E2, and the third photocoupler E3 each have eight pins, namely a first pin, a second pin, ..., an Mth pin, where M=8;

[0091] The first pin and the second pin of the first photocoupler E1 are respectively connected to the fourth pin and the third pin of the simple horn socket J1, so that the first photocoupler E1 receives the synchronization signal SYNC from the simple horn socket J1;

[0092] The third pin and the fourth pin of the first photocoupler E1 are respectively connected to the first pin and the second pin of the simple horn socket J1, so that the first photocoupler E1 receives the clock signal CLK from the simple horn socket J1;

[0093] The fifth pin of the first photocoupler E1 is grounded, and the eighth pin is connected to the power supply VCC;

[0094] The seventh pin of the first photocoupler E1 is connected to the DA conversion unit for transmitting the synchronization signal SYNC to the DA conversion unit (eg Figure 4 That is, the seventh pin of E1 is connected to the CS pins of DA conversion chips U5, U6, and U7 respectively);

[0095] The sixth pin of the first photocoupler E1 is connected to the DA conversion unit for transmitting the clock signal CLK to the DA conversion unit (eg Figure 4 That is, the sixth pin of E1 is connected to the SCLK pins of DA conversion chips U5, U6, and U7 respectively);

[0096] The first pin and the second pin of the second photocoupler E2 are respectively connected to the seventh pin and the eighth pin of the simple horn socket J1, so that the second photocoupler E2 receives the Y-axis control signal YCH from the simple horn socket J1;

[0097] The third pin and the fourth pin of the second photocoupler E2 are respectively connected to the sixth pin and the fifth pin of the simple horn socket J1, so that the second photocoupler E2 receives the X-axis control signal XCH from the simple horn socket J1;

[0098] The fifth pin of the second photocoupler E2 is grounded, and the eighth pin is connected to the power supply VCC;

[0099] The seventh pin of the second photocoupler E2 is connected to the DA conversion unit for transmitting the Y-axis control signal YCH to the DA conversion unit (eg Figure 4 That is, the seventh pin of E2 is connected to the DIN pin of the DA conversion chip U6);

[0100] The sixth pin of the second photocoupler E2 is connected to the DA conversion unit for transmitting the X-axis control signal XCH to the DA conversion unit; (eg Figure 4 That is, the sixth pin of E2 is connected to the DIN pin of DA conversion chip U5)

[0101] The third pin and the fourth pin of the third photocoupler E3 are respectively connected to the tenth pin and the ninth pin of the simple horn socket J1, so that the third photocoupler E3 receives the Z-axis control signal ZCH from the simple horn socket J1;

[0102] The fifth pin of the third photocoupler E3 is grounded, and the eighth pin is connected to the power supply VCC;

[0103] The sixth pin of the third photocoupler E3 is connected to the DA conversion unit for transmitting the Z-axis control signal ZCH to the DA conversion unit (eg Figure 4 That is, the sixth pin of E3 is connected to the DIN pin of the DA conversion chip U7).

[0104] The DA conversion unit includes a first DA conversion chip U5, a second DA conversion chip U6 and a third DA conversion chip U7; the models of the first DA conversion chip U5, the second DA conversion chip U6 and the third DA conversion chip U7 are all LTC2642IMS.

[0105] The first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 all have ten pins, namely, REF, CS, SCLK, DIN, CLR, VOUT, INV, RFB, VDD, and GND pins;

[0106] The REF and GND pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all grounded; the VDD pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the power supply VCC;

[0107] The CS pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the optical coupling isolation unit, for receiving the synchronization signal SYNC from the optical coupling isolation unit;

[0108] The SCLK pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the optical coupling isolation unit, for receiving the clock signal CLK from the optical coupling isolation unit;

[0109] The CLR pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the detection signal unit, and are used to receive the clear signal CLR from the optical coupling isolation unit;

[0110] The VOUT, INV and RFB pins of the first DA conversion chip U5, the second DA conversion chip U6 and the third DA conversion chip U7 are all connected to the operational amplifier unit for transmitting analog signals;

[0111] The DIN pin of the first DA conversion chip U5 is connected to the optical coupling isolation unit, and is used to receive the X-axis control signal XCH from the optical coupling isolation unit;

[0112] The DIN pin of the second DA conversion chip U6 is connected to the optical coupling isolation unit, and is used to receive the Y-axis control signal YCH from the optical coupling isolation unit;

[0113] The DIN pin of the third DA conversion chip U7 is connected to the optical coupling isolation unit, and is used to receive the Z-axis control signal ZCH from the optical coupling isolation unit.

[0114] The operational amplifier unit includes a first operational amplifier U8 and a second operational amplifier U9;

[0115] The model of the first operational amplifier U8 is MC33079DT; the model of the second operational amplifier U9 is MC33078DT.

[0116] The first operational amplifier U8 includes OUT1, -IN1, +IN1, VCC, +IN2, -IN2, OUT2, OUT3, -IN3, +IN3, VEE, +IN4, -IN4, OUT4 pins;

[0117] The OUT1 pin of the first operational amplifier U8 is connected to the RFB pin of the first DA conversion chip U5, and the -IN1 and +IN1 pins of U8 are respectively connected to the INV and VOUT pins of U5; so that the first operational amplifier U8 receives the analog signal of the first DA conversion chip U5;

[0118] The OUT4 pin of the first operational amplifier U8 is connected to the RFB pin of the second DA conversion chip U6, and the -IN4 and +IN4 pins of U8 are respectively connected to the INV and VOUT pins of U6; so that the first operational amplifier U8 receives the analog signal of the second DA conversion chip U6;

[0119] The VCC pin of the first operational amplifier U8 is connected to a +15V voltage, and the VEE pin of U8 is connected to a -15V voltage;

[0120] The OUT3 pin of the first operational amplifier U8 is connected to the -IN3 pin of U8, and is used to transmit the analog signal of the first DA conversion chip U5 after the analog signal is amplified by operation; that is, in this embodiment, the amplified analog signal output by the OUT3 pin is the analog signal after the analog signal output by the first DA conversion chip U5 is amplified by operation.

[0121] The OUT2 pin of the first operational amplifier U8 is connected to the -IN2 pin of U8, and is used to transmit the analog signal of the second DA conversion chip U6 after the analog signal is amplified by operation; that is, in this embodiment, the amplified analog signal output by the OUT2 pin is the analog signal after the analog signal output by the second DA conversion chip U6 is amplified by operation.

[0122] The second operational amplifier U9 includes OUT1, -IN1, +IN1, VEE, +IN2, -IN2, OUT2, and VCC pins; the OUT1 pin of the second operational amplifier U9 is connected to the RFB pin of the third DA conversion chip U7, and the -IN1 and +IN1 pins of U9 are respectively connected to the INV and VOUT pins of U7; so that the second operational amplifier U9 receives the analog signal of the third DA conversion chip U7;

[0123] The VCC pin of the second operational amplifier U9 is connected to a +15V voltage, and the VEE pin of U9 is connected to a -15V voltage;

[0124] The OUT2 pin of the second operational amplifier U9 is connected to the -IN2 pin of U9, and is used to transmit the analog signal of the third DA conversion chip U7 after operational amplification; that is, in this embodiment, the amplified analog signal output by the OUT2 pin is the analog signal after operational amplification of the analog signal output by the third DA conversion chip U7.

[0125] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. An integrated three-way DA conversion circuit control system for laser marking control, characterized in that: It includes a simple horn socket J1, a detection signal unit, an optical coupler isolation unit, a DA conversion unit and an operational amplifier unit; The simple horn socket J1 is connected to the detection signal unit and the optical coupling isolation unit; the detection signal unit and the optical coupling isolation unit are respectively connected to the DA conversion unit, and the DA conversion unit is connected to the operational amplifier unit; The simple bull-horn socket J1 is configured to receive a control signal and output a differential serial transmission signal to a detection signal unit and an optical coupling isolation unit; The differential serial transmission signal includes five groups of signals, namely a clock signal, a synchronization signal, an X-axis control signal, a Y-axis control signal and a Z-axis control signal; The detection signal unit is configured to receive a synchronization signal from the simple horn socket J1 and determine whether the control signal is disconnected. When the control signal is disconnected, the detection signal unit sends a reset signal to the DA conversion unit; The optical coupling isolation unit is configured to receive a differential serial transmission signal from the simple horn socket J1 and output it to the DA conversion unit; The DA conversion unit is configured to receive a reset signal from the detection signal unit; when the DA conversion unit receives the reset signal, the DA conversion unit is powered off; the DA conversion unit is configured to receive a differential serial transmission signal from the optical coupling isolation unit, convert it into an analog signal and output it to the operational amplifier unit; The operational amplifier unit is configured to receive the analog signal from the DA conversion unit, and operationally amplify the analog signal and then output it.

2. The circuit control system according to claim 1, characterized in that: The optical coupling isolation unit includes a first photocoupler E1, a second photocoupler E2 and a third photocoupler E3; the first photocoupler E1 is configured to receive a clock signal and a synchronization signal; the second photocoupler E2 is configured to receive an X-axis control signal and a Y-axis control signal; the third photocoupler E3 is configured to receive a Z-axis control signal.

3. The circuit control system according to claim 1, characterized in that: The DA conversion unit includes a first DA conversion chip U5, a second DA conversion chip U6 and a third DA conversion chip U7; the first DA conversion chip U5 is configured to receive a synchronization signal, a clock signal, an X-axis control signal and a reset signal; the second DA conversion chip U6 is configured to receive a synchronization signal, a clock signal, a Y-axis control signal and a reset signal; the third DA conversion chip U7 is configured to receive a synchronization signal, a clock signal, a Z-axis control signal and a reset signal.

4. The circuit control system according to claim 1, characterized in that: The operational amplifier unit includes a first operational amplifier U8 and a second operational amplifier U9; the first operational amplifier U8 is configured to receive analog signals from a first DA conversion chip U5 and a second DA conversion chip U6; the second operational amplifier U9 is configured to receive analog signals from a third DA conversion chip U7.

5. The circuit control system according to any one of claims 1 to 4, characterized in that: The model of the simple bull-horn socket J1 is DC3-2*13P, and the simple bull-horn socket J1 has twenty-six pins, namely the first pin, the second pin...the Nth pin, where N=26; the first pin and the second pin are used to transmit the clock signal; the third pin and the fourth pin are used to transmit the synchronization signal; the fifth pin and the sixth pin are used to transmit the X-axis control signal; the seventh pin and the eighth pin are used to transmit the Y-axis control signal; the ninth pin and the tenth pin are used to transmit the Z-axis control signal.

6. The circuit control system according to claim 5, characterized in that: The detection signal unit includes a high-speed optical coupler E4, four diodes D11, D12, D13, D14, resistors R3, R4, and a capacitor C1; the model of the high-speed optical coupler E4 is TLP2745; The high-speed optical coupler E4 has five pins, namely a first pin, a second pin, a third pin, a fourth pin and a fifth pin; The diodes D11 and D12 are connected in series, and D13 and D14 are connected in series and then in parallel, and the resistor R3 is connected to one end of the parallel-connected D11 and D13; The second pin of the high-speed optical coupler E4 is connected to one end of D12 and D14 in parallel; the first pin of the high-speed optical coupler E4 is connected to the other end of the resistor R3; the capacitor C1 is connected in parallel to the first pin and the second pin of the high-speed optical coupler E4; the third pin of the high-speed optical coupler E4 is grounded, the fourth pin of the high-speed optical coupler E4 is connected to the resistor R4, and the other end of the resistor R4 is connected to the DA conversion unit, so that the detection signal unit transmits a reset signal to the DA conversion unit; The fifth pin of the high-speed optical coupler E4 is connected to the power supply VCC; the third pin of the simple horn socket J1 is connected to the cathode of the diode D12, and the fourth pin of the simple horn socket J1 is connected to the cathode of the diode D14, so that the synchronization signal is transmitted from the simple horn socket to the detection signal unit.

7. The circuit control system according to claim 5, characterized in that: The first photocoupler E1, the second photocoupler E2 and the third photocoupler E3 are all of the type HCPL0631; The first photocoupler E1, the second photocoupler E2, and the third photocoupler E3 each have eight pins, namely a first pin, a second pin, ..., an Mth pin, wherein M=8; The first pin and the second pin of the first photocoupler E1 are respectively connected to the fourth pin and the third pin of the simple bull-horn socket J1, so that the first photocoupler E1 receives the synchronization signal from the simple bull-horn socket J1; The third pin and the fourth pin of the first photocoupler E1 are respectively connected to the first pin and the second pin of the simple horn socket J1, so that the first photocoupler E1 receives the clock signal from the simple horn socket J1; The fifth pin of the first photocoupler E1 is grounded, and the eighth pin is connected to the power supply VCC; The seventh pin of the first photocoupler E1 is connected to the DA conversion unit, and is used to transmit the synchronization signal to the DA conversion unit; The sixth pin of the first photocoupler E1 is connected to the DA conversion unit and is used to transmit the clock signal to the DA conversion unit; The first pin and the second pin of the second photocoupler E2 are respectively connected to the seventh pin and the eighth pin of the simple horn socket J1, so that the second photocoupler E2 receives the Y-axis control signal from the simple horn socket J1; The third pin and the fourth pin of the second photocoupler E2 are respectively connected to the sixth pin and the fifth pin of the simple horn socket J1, so that the second photocoupler E2 receives the X-axis control signal from the simple horn socket J1; The fifth pin of the second photocoupler E2 is grounded, and the eighth pin is connected to the power supply VCC; The seventh pin of the second photocoupler E2 is connected to the DA conversion unit, and is used to transmit the Y-axis control signal to the DA conversion unit; The sixth pin of the second photoelectric coupler E2 is connected to the DA conversion unit, and is used to transmit the X-axis control signal to the DA conversion unit; The third pin and the fourth pin of the third photoelectric coupler E3 are respectively connected to the tenth pin and the ninth pin of the simple horn socket J1, so that the third photoelectric coupler E3 receives the Z-axis control signal from the simple horn socket J1; The fifth pin of the third photocoupler E3 is grounded, and the eighth pin is connected to the power supply VCC; The sixth pin of the third photoelectric coupler E3 is connected to the DA conversion unit for transmitting the Z-axis control signal to the DA conversion unit.

8. The circuit control system according to claim 5, characterized in that: The models of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all LTC2642IMS; The first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 all have ten pins, namely REF, CS, SCLK, DIN, CLR, VOUT, INV, RFB, VDD, and GND pins; The REF and GND pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all grounded; the VDD pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the power supply VCC; The CS pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the optical coupling isolation unit to receive the synchronization signal from the optical coupling isolation unit; The SCLK pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the optical coupling isolation unit to receive the clock signal from the optical coupling isolation unit; The CLR pins of the first DA conversion chip U5, the second DA conversion chip U6, and the third DA conversion chip U7 are all connected to the detection signal unit, for receiving the reset signal from the optical coupling isolation unit; The VOUT, INV and RFB pins of the first DA conversion chip U5, the second DA conversion chip U6 and the third DA conversion chip U7 are all connected to the operational amplifier unit for transmitting analog signals; The DIN pin of the first DA conversion chip U5 is connected to the optical coupling isolation unit, so as to receive the X-axis control signal from the optical coupling isolation unit; The DIN pin of the second DA conversion chip U6 is connected to the optical coupling isolation unit, so as to receive the Y-axis control signal from the optical coupling isolation unit; The DIN pin of the third DA conversion chip U7 is connected to the optical coupling isolation unit, and is used to receive the Z-axis control signal from the optical coupling isolation unit.

9. The circuit control system according to claim 4, characterized in that: The model of the first operational amplifier U8 is MC33079DT; the model of the second operational amplifier U9 is MC33078DT; The first operational amplifier U8 includes OUT1, -IN1, +IN1, VCC, +IN2, -IN2, OUT2, OUT3, -IN3, +IN3, VEE, +IN4, -IN4, OUT4 pins; The OUT1 pin of the first operational amplifier U8 is connected to the RFB pin of the first DA conversion chip U5, and the -IN1 and +IN1 pins of U8 are connected to the INV and VOUT pins of U5 respectively; The OUT4 pin of the first operational amplifier U8 is connected to the RFB pin of the second DA conversion chip U6, and the -IN4 and +IN4 pins of U8 are respectively connected to the INV and VOUT pins of U6; so that the first operational amplifier U8 receives the analog signal of the second DA conversion chip U6; The VCC pin of the first operational amplifier U8 is connected to a +15V voltage, and the VEE pin of U8 is connected to a -15V voltage; The OUT3 pin of the first operational amplifier U8 is connected to the -IN3 pin of U8; the OUT2 pin of the first operational amplifier U8 is connected to the -IN2 pin of U8; The second operational amplifier U9 includes OUT1, -IN1, +IN1, VEE, +IN2, -IN2, OUT2, and VCC pins; the OUT1 pin of the second operational amplifier U9 is connected to the RFB pin of the third DA conversion chip U7, and the -IN1 and +IN1 pins of U9 are respectively connected to the INV and VOUT pins of U7; The VCC pin of the second operational amplifier U9 is connected to a +15V voltage, and the VEE pin of U9 is connected to a -15V voltage; The OUT2 pin of the second operational amplifier U9 is connected to the -IN2 pin of U9.

10. The circuit control system according to claim 1, characterized in that: The analog signal voltage output by the DA conversion unit is ±5V, and the operational amplifier unit amplifies the ±5V voltage to ±10V voltage.

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