CN110202257A - A kind of laser control apparatus - Google Patents
A kind of laser control apparatus Download PDFInfo
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- CN110202257A CN110202257A CN201910583876.6A CN201910583876A CN110202257A CN 110202257 A CN110202257 A CN 110202257A CN 201910583876 A CN201910583876 A CN 201910583876A CN 110202257 A CN110202257 A CN 110202257A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
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Abstract
The present invention provides a kind of laser control apparatus, comprising: single-chip microcontroller, differential-to-single-ended circuit, level shifting circuit, controller, pulse amplifying circuit are electrically connected with power circuit；Differential-to-single-ended circuit is used to X-axis displacement signal and Y-axis displacement signal switching to X-axis pulse signal and Y-axis pulse signal respectively；X-axis pulse signal and Y-axis pulse signal are input to controller；Level shifting circuit is used to receive the data command of host computer transmission, and data command is changed into level signal and is sent to single-chip microcontroller；Single-chip microcontroller is used to level signal changing into parallel data, and parallel data is issued controller；Controller is used for after determining that movable workbench distance reaches the distance value that parallel data is characterized, and issues electric pulse to pulse amplifying circuit；Pulse amplifying circuit is for amplifying electric pulse and exporting amplified electric pulse to laser；Laser is for generating light pulse.Using technical solution provided by the invention, realizes light pulse and be uniformly distributed on cutting track.
Description
Technical field
The present invention relates to laser cutting technique field more particularly to a kind of laser control apparatus.
Background technique
Laser control apparatus is mainly used for controlling laser, so that the light pulse that laser issues was cut into
Workpiece reaches user demand.
Existing laser control apparatus usually controls the power of laser pulse, for example, being flowed through by inspection sharp
The current signal of light device carries out negative-feedback regu- lation to realize electric current list closed-loop control, makes to flow through sharp according to the current signal of detection
The electric current of light device is stablized, to realize the power stability of laser source output laser pulse.But existing laser control apparatus is simultaneously
Whether the light pulse for not accounting for laser sending is evenly distributed on cutting track, and inventor has found in the course of the research, existing
The light pulse that some laser control apparatus control lasers are issued usually is unevenly distributed on cutting track, therefore processes matter
Amount is generally difficult to meet the requirements.
Therefore, it is necessary to a kind of new laser pulse control device is designed, to overcome the above problem.
Summary of the invention
It is an object of the invention to overcome the defect of the prior art, a kind of laser pulse control device is provided, to realize
Light pulse is uniformly distributed on cutting track.
The present invention is implemented as follows:
The present invention provides a kind of laser control apparatus, including host computer, single-chip microcontroller, differential-to-single-ended circuit, level to turn
Change circuit, controller, pulse amplifying circuit, laser, power circuit；Wherein, the single-chip microcontroller, the difference turn single-ended electricity
Road, the level shifting circuit, the controller, the pulse amplifying circuit are electrically connected with the power circuit；
The differential-to-single-ended circuit, for receiving X-axis displacement signal and Y-axis displacement signal, by the X-axis displacement signal
90 degree of phase difference of X-axis pulse signal and 90 degree of phase difference of Y-axis pulse signal are respectively converted into the Y-axis displacement signal；
The X-axis pulse signal and the Y-axis pulse signal are input to the controller；The X-axis displacement signal and the Y-axis position
Shifting signal is for characterizing movable workbench distance；
The level shifting circuit, the data command sent for receiving the host computer, the data command is changed into
Level signal, and the level signal is sent to the single-chip microcontroller；
The single-chip microcontroller is converted into parallel data for receiving level signal, and by the received level signal of institute, will be parallel
Data are sent to controller；
The controller, for according to the received X-axis pulse signal of institute and Y-axis pulse signal determine movable workbench away from
From, determine the distance value that parallel data is characterized, judge movable workbench distance whether reach the distance that parallel data is characterized
Value, if reaching, issues electric pulse to pulse amplifying circuit；
Pulse amplifying circuit for amplifying the received electric pulse of institute, and amplified electric pulse is exported to sharp
Light device；
Laser under the triggering for electric pulse after amplification, generates light pulse.
Optionally, X-axis displacement signal includes two-way X-axis displacement differential signal, and Y-axis displacement signal includes the displacement of two-way Y-axis
Differential signal；
The differential-to-single-ended circuit includes X-axis displacement signal receiving end, Y-axis displacement signal receiving end and four
MAX3490 chip；
X-axis displacement signal receiving end, for the received two-way X-axis displacement differential signal of institute to be separately input into two
MAX3490 chip；
Y-axis displacement signal receiving end, for the received two-way Y-axis displacement differential signal of institute to be separately input into another two
A MAX3490 chip；
Every MAX3490 chip, for the received X-axis displacement differential signal of institute or Y-axis displacement differential signal to be changed into list
The single-ended signal changed into is input to the X-axis pulse input port or Y-axis pulse input port of controller by end signal.
Optionally, the level shifting circuit includes SP3232 chip, and the host computer is electrically connected with RS232 serial ports, institute
The 2nd of RS232 serial ports the, 3 pins are stated to be electrically connected with the 14th of SP3232 chip, the 13rd pin respectively, the SP3232 chip
11st, 12 pins are electrically connected with the serial ports transmitting terminal of single-chip microcontroller, serial ports receiving end respectively；
The data/address bus port of the controller, pulse enable port, test and work port switching respectively with single-chip microcontroller
Data/address bus port, pulse enable port, test with work port switching it is corresponding be electrically connected；
The pulse amplifying circuit includes radio frequency interface and transport and placing device, pulse output interface and the fortune of the controller
The input terminal electrical connection of device is put, the output end of the transport and placing device is electrically connected with the input terminal of the radio frequency interface, and the radio frequency connects
The output end of mouth passes through cable connection to the laser.
Optionally, the level shifting circuit is also used to receive the test command of host computer transmission, and host computer is sent
Test command is sent to single-chip microcontroller；
The single-chip microcontroller after being also used to receive test command, generates test signal；And it is generated test signal is defeated
Enter to controller；
The controller generates test pulse, generated test pulse is inputted after being also used to receive test signal
To pulse amplifying circuit；
The pulse amplifying circuit is also used to amplify test pulse, and amplified test pulse is sent to laser.
Optionally, the single-chip microcontroller and the controller are corresponding equipped with test pulse port, the test of the single-chip microcontroller
Pulse port is electrically connected with the test pulse port of the controller.
Optionally, described device further includes auxiliary circuit, and auxiliary circuit includes external interface, photoelectrical coupler, the first finger
Show lamp, the second indicator light and third indicator light；
The external interface the 1st, 3 pins difference external direct current power supply and external pulse enable signal, the 2nd, 4 pins it is equal
Ground connection；
Series resistor between 3rd pin of the external interface and the 1st pin of the photoelectrical coupler；
The pulse of the controller enables interface and is electrically connected with the 4th pin of the photoelectrical coupler；The photoelectric coupling
2nd pin of device is grounded after concatenating the first indicator light；3rd pin of the photoelectrical coupler is grounded；
Second indicator light is electrically connected with the LED interface of the controller；The third indicator light and radio frequency interface
Output end electrical connection.
Optionally, the power circuit includes IB2405LS-1W chip and AMS1117-3.3 chip；The controller is
The CPLD chip of model EPM570.
Optionally, second indicator light is light emitting diode, and the is accessed after the port the LED series resistor of the controller
The cathode of positive, described second indicator light of two indicator lights is grounded.
Optionally, the single-chip microcontroller is STM32F103 chip.
Optionally, the transport and placing device is ADA4891 transport and placing device or AD826AN transport and placing device.
The invention has the following advantages: using the embodiment of the present invention, by differential-to-single-ended circuit by displacement signal
90 degree of phase difference of X-axis pulse signal and Y-axis pulse signal are changed into, host computer can be sent out by level shifting circuit to single-chip microcontroller
Data command is sent, single-chip microcontroller can send parallel data to controller, and controller is according to X-axis pulse signal and Y-axis pulse signal
It determines movable workbench distance, determines the distance value that parallel data is characterized, judge whether movable workbench distance reaches parallel
The distance value that data are characterized issues an electric pulse to pulse amplifying circuit, realizes in numerical control X/Y plane work if reaching
Make on platform curve movement, every one section of fixed range, issues an electric pulse；The electric pulse that controller is issued is put through extra pulse
Output reduces interference signal and improves frequency stability, to effectively control laser to laser after the amplification of big circuit
Device issues a light pulse, uniformly occurs light pulse point on cutting track to realize, to improve work piece cut matter
Amount.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of laser control apparatus provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of differential-to-single-ended circuit provided in an embodiment of the present invention；
Fig. 3 is the electric operation control circuit figure provided in an embodiment of the present invention formed by controller；
Fig. 4 is a kind of structural schematic diagram of level shifting circuit provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of pulse amplifying circuit provided in an embodiment of the present invention；
Fig. 6 is the circuit diagram provided in an embodiment of the present invention formed by single-chip microcontroller；
Fig. 7 is a kind of structural schematic diagram of power circuit provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of auxiliary circuit provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
It is uniformly distributed on motion profile to control the laser pulse spot of laser sending, the present invention provides one kind to swash
Light control device is illustrated below in conjunction with Fig. 1-8 pairs of specific embodiments.
As shown in Figure 1, a kind of laser control apparatus provided by the invention, including host computer, single-chip microcontroller, difference turn single-ended electricity
Road, level shifting circuit, controller, pulse amplifying circuit, laser, power circuit；Wherein, single-chip microcontroller, difference turn single-ended electricity
Road, level shifting circuit, controller, pulse amplifying circuit are electrically connected with the power circuit；
The differential-to-single-ended circuit, for receiving X-axis displacement signal and Y-axis displacement signal, by X-axis displacement signal and Y
Axle position shifting signal is respectively converted into 90 degree of phase difference of X-axis pulse signal and 90 degree of phase difference of Y-axis pulse signal；By X-axis arteries and veins
It rushes signal and Y-axis pulse signal is input to controller；X-axis displacement signal and Y-axis displacement signal for characterize movable workbench away from
From；
The level shifting circuit, for receiving the data command of host computer transmission, by the data command of host computer transmission
Level signal is changed into, and level signal is sent to single-chip microcontroller；
The single-chip microcontroller is converted into parallel data for receiving level signal, and by level signal, parallel data is sent
To controller；
The controller, for according to the received X-axis pulse signal of institute and Y-axis pulse signal determine movable workbench away from
From, determine the distance value that parallel data is characterized, judge movable workbench distance whether reach the distance that parallel data is characterized
Value, if reaching, issues electric pulse to pulse amplifying circuit；
Pulse amplifying circuit for amplifying the received electric pulse of institute, and amplified electric pulse is exported to sharp
Light device,
Laser under the triggering for electric pulse after amplification, generates light pulse.
X-axis displacement signal includes two-way X-axis displacement differential signal, and Y-axis displacement signal includes two-way Y-axis displacement difference letter
Number；The differential-to-single-ended circuit includes X-axis displacement signal receiving end, Y-axis displacement signal receiving end and four MAX3490 cores
Piece；
X-axis displacement signal receiving end, for the received two-way X-axis displacement differential signal of institute to be separately input into two
MAX3490 chip；Y-axis displacement signal receiving end, for the received two-way Y-axis displacement differential signal of institute to be separately input into another two
A MAX3490 chip；
Every MAX3490 chip, for the received X-axis displacement differential signal of institute or Y-axis displacement differential signal to be changed into list
The single-ended signal changed into is input to the X-axis pulse input port or Y-axis pulse input port of controller by end signal.
The level shifting circuit includes SP3232 chip, and the host computer is electrically connected with RS232 serial ports, the RS232
Serial ports the 2nd, 3 pins be electrically connected respectively with the 14th of SP3232 chip, the 13rd pin, the 11st, the 12 of the SP3232 chip
Pin is electrically connected with the serial ports transmitting terminal of single-chip microcontroller, serial ports receiving end respectively；
The data/address bus port of the controller, pulse enable port, test and work port switching respectively with single-chip microcontroller
Data/address bus port, pulse enable port, test with work port switching it is corresponding be electrically connected；
The pulse amplifying circuit includes radio frequency interface and transport and placing device, the pulse output interface and the arteries and veins of the controller
The input terminal electrical connection of the transport and placing device of amplifying circuit is rushed, the output end of transport and placing device is electrically connected with the input terminal of radio frequency interface, radio frequency
The output end of interface passes through cable connection to the laser.
Host computer can be the computer or server or PLC (Programmable Logic of directly sending manipulation command
Controller, programmable logic controller (PLC)) etc., controller can be the CPLD (Complex of model EPM570
Programmable Logic Device, Complex Programmable Logic Devices) chip, it is specifically as follows EPM570T100C5N core
Piece, or can also be the CPLD chip of other models in other implementations；Single-chip microcontroller can be STM32F103 chip,
It or may be the STM32 series of other models or the chip of 51 series；Transport and placing device can for ADA4891 transport and placing device or
AD826AN transport and placing device.Laser can be any type of laser.
In order to avoid the signal interference of industry spot to greatest extent, the displacement signal of characterization movable workbench distance can be
The differential signal of 422 standards, differential-to-single-ended circuit can receive displacement signal, including two-way X-axis is displaced differential signal and two
Road Y-axis is displaced differential signal, and the received displacement signal of institute is changed into single-ended TTL (Transistor by MAX3490 chip
Transistor Logic, transistor-transistor logic level) signal, specific differential-to-single-ended circuit structure chart can be such as Fig. 2
Shown, it includes that X-axis differential signal B+, X-axis differential signal B- and X-axis differential signal A+, X-axis are poor that two-way X-axis, which is displaced differential signal,
Sub-signal A-；It includes Y-axis differential signal B+, Y-axis differential signal B- and Y-axis differential signal A+, Y that two-way Y-axis, which is displaced differential signal,
Axis differential signal A-；X-axis displacement signal receiving end and Y-axis displacement signal receiving end can be DB9 interface J9, can connect respectively
Receive the displacement signal of grating scale or encoder output；Each MAX3490 chip the 3rd, 5,6 pins it is hanging, the 7th, 8 pins access
Differential signal all the way, by the output of the 2nd pin, single-ended signal, the 1st pin access power module, the 4th pin ground connection all the way.XA and
The X-axis pulse signal that XB is 90 degree of phase difference；The Y-axis pulse signal that YA and YB is 90 degree of phase difference.
In a kind of implementation, the circuit diagram that is formed by controller can be with as shown in figure 3, clear for interpreting blueprints, by one
EPM570 points are multiple portions, are denoted as U6A, U6B, U6C and U6D, and C0-C8 is the data/address bus port of controller, P-OUT
Port is the pulse output interface of controller；The port XA and the port XB are that X-axis pulse input port, the port YA and the port YB are Y
Axle pulse input port；The port CLK0 is clock port, CPLD clock module input clock signal to the port CLK0；It can use
50MHz external crystal-controlled oscillation is as CPLD clock module；
EPM570 can be written into the program write in advance by CPLD programming port, for example, in order to X-axis pulse signal and
Y-axis pulse signal be filtered with 4 process of frequency multiplication, EPM570 can be written into existing filtering algorithm and 4 process of frequency multiplication algorithms,
So as to reduce interference signal and improve frequency stability.
In order to issue electric pulse, and then trigger swashing for laser sending after workbench every time mobile default fixed range
Light pulse point is uniformly distributed on motion profile, the program that can be realized the function or algorithm write in advance can be written
EPM570 executes program by EPM570 or algorithm realizes the function.For example, realizing that the algorithm of the function can be such that calculates X
The quadratic sum of axis pulse counter and Y-axis pulse counter, and square of pre-determined distance C is subtracted with this quadratic sum, when resulting
When difference is greater than or equal to 0, the electric pulse of 400nS width can be generated from the 75th foot of EPM570.
The digital level that default fixed range C can be obtained by the data/address bus port of controller is determining, detailed process
It can be with are as follows: default fixed range C is sent to controller by level shifting circuit and single-chip microcontroller by host computer, illustratively, electricity
Flat conversion circuit can be to pass through as shown in figure 4, set distance C is sent to SP3232 chip by RS232 serial ports J3 by host computer
SP3232 chip is converted into Transistor-Transistor Logic level signal, and by Transistor-Transistor Logic level signal to single-chip microcontroller；It is converted into parallel data by single-chip microcontroller,
And parallel data is transmitted to the data/address bus port of controller.To, controller can by execute the algorithm write in advance come
Square of C is calculated, and judges whether the quadratic sum of X-axis pulse counter and Y-axis pulse counter is greater than square of C, if more than
Or be equal to, then the electric pulse of 400nS width is generated from the 75th foot of EPM570.
Since the impulse level and power of the EPM570 electric pulse generated may not met the requirements, it can pass through
Pulse amplifying circuit is amplified and is matched to the EPM570 electric pulse generated, so that the level and power of electric pulse are all satisfied and want
It asks.For example, the physical circuit figure of pulse amplifying circuit can be as shown in figure 5, ADA4891 (ADA4891-2ARZ) be high speed amplifier
Device, the present invention use the 2nd of ADA4891 the, 3 pins as input, and the 1st pin goes here and there the 1st pin of ADA4891 as output again
After meeting 42 Europe resistance R8, it is connected to BNC (Bayonet Neill-Concelman, Neil-Kang Saiman bayonet) radio frequency interface
J2, to match 50 Europe coaxial cables of connecting laser, BNC is a kind of radio frequency interface, is used for connecting cable, and connect by cable
The 2nd pin to laser, the 1st pin connected with outer casing of BNC, BNC connects core wire.P-OUT is the pulse come from CPLD, through the
3 pins are input to ADA4891, amplify pulse by ADA4891, then by BNC radio frequency interface are issued amplified pulse sharp
Light device.
It is whether normal in order in the case where workbench does not move, can detecte out laser, in a kind of implementation, institute
The test command that level shifting circuit is also used to receive host computer transmission is stated, the test command that host computer is sent is sent to monolithic
Machine；After single-chip microcontroller is also used to receive test command, corresponding test signal is generated, test signal can be a kind of pulse letter
Number；And test signal is input to controller after controller is also used to receive test signal and generates corresponding test pulse,
Test pulse is input to pulse amplifying circuit；Pulse amplifying circuit is also used to amplify test pulse, and by amplified test
Pulse is sent to laser.
Single-chip microcontroller and controller are also corresponding to be equipped with test pulse port, the test pulse port of the single-chip microcontroller with it is described
The test pulse port of controller is electrically connected, for example, the circuit diagram formed by single-chip microcontroller (CPU) as shown in fig. 6, the 52nd, 53,
54,55,56,57,58,59,61 pins are C0~C8 data/address bus port of single-chip microcontroller, and the 50th pin is the CNC/ of single-chip microcontroller
Local test is the test pulse port of single-chip microcontroller with work port switching, the 26th pin, is established between single-chip microcontroller and controller
The signal flow of each port of connection relationship be from single-chip microcontroller to controller, single-chip microcontroller the 43rd, the communication ports of 42 pins with
SP3232 is two-way communication.
Host computer is said the word according to agreement to single-chip microcontroller, the test and work port switching activation of single-chip microcontroller by serial ports
Afterwards, the test pulse port of single-chip microcontroller generates corresponding test signal, and exports to the test pulse port of controller, passes through
Test pulse is sent to laser by EPM570, and this test pulse can trigger laser and generate light pulse, if laser success
Light pulse is issued, then can further judge whether the light pulse meets predetermined pulse condition, predetermined pulse condition can root
It is previously set according to demand, for example, may include pulse shape, duty ratio isopulse index parameter, if light pulse meets default arteries and veins
Condition is rushed, may indicate that laser is in normal operating conditions；If light pulse does not meet predetermined pulse condition, laser may indicate that
Device is not in normal operating conditions.Therefore workbench can be kept not in the case where light pulse does not normally get to workpiece
It is dynamic, whether abnormal carry out detection laser, so that checking is that workbench exception or laser are abnormal, guarantees each equipment just to realize
Often work.
Since all chip and element require power supply power supply, to seem circuit diagram clearly, by institute's electricity in need
Source is all contacted with network label, and such as: all pins for indicating+3.3V all connect together.In a kind of implementation, power supply
Circuit can with as shown in fig. 7, C9, C10, C11, C12 are capacitors, power circuit may include IB2405LS-1W chip and
AMS1117-3.3 chip.AMS1117-3.3 is a kind of positive low dropout voltage regulator that output voltage is 3.3V, IB2405LS-1W
It is also a kind of decompression chip, power circuit input 5V can export 3.3V；Input 24V can export 5V, realize power supply conversion.
For the ease of checking working condition, described device can also include auxiliary circuit, auxiliary circuit include external interface,
Photoelectrical coupler, the first indicator light, the second indicator light and third indicator light；
The external interface the 1st, 3 pins difference external direct current power supply and external pulse enable signal, the outside connect
Mouthful the 2nd, 4 pins are grounded；
Series resistor between 3rd pin of the external interface and the 1st pin of the photoelectrical coupler；
The pulse of the controller enables interface and is electrically connected with the 4th pin of the photoelectrical coupler；The photoelectric coupling
2nd pin of device is grounded after concatenating the first indicator light；3rd pin of the photoelectrical coupler is grounded；
Second indicator light is electrically connected with the LED interface of the controller；The third indicator light and radio frequency interface
Output end electrical connection.
External interface can be 4 foot contact pins, and the model EL357N-G of photoelectrical coupler, first indicator light is described
Second indicator light, the third indicator light can be light emitting diode (LED), and the port the LED series resistor of controller is followed by
The cathode ground connection for entering positive, described second indicator light of the second indicator light accesses the after the output end series resistor of radio frequency interface
The cathode of positive, the described third indicator light of three indicator lights is grounded.
Illustratively, auxiliary circuit can with as shown in figure 8, external interface J7 the 1st, 2 pins distinguish external 24V direct current
Source and ground connection, the 3rd, the external pulse enable signal of 4 pins difference and ground connection, external equipment can be to the 3rd pipes of external interface J7
Foot input pulse enable signal, pulse enable signal can be high level signal, and LED1, LED2, LED3 respectively indicate the first finger
Show lamp, the second indicator light and third indicator light, is gone here and there between the 3rd pin of external interface J7 and the 1st pin of photoelectrical coupler U5
The resistance R1 for meeting a 5.1k concatenates 1k resistance R2, third indicator light and control between the second indicator light and the port LED of controller
3.3k resistance R4 is concatenated between the port LED of device processed；When having 24V voltage between the 3rd pin of external interface J7 and the 4th pin,
If LED1 is bright or flashing, expression controller have enabled input；If LED2 is bright or flashes, indicate that the program in controller is being run；
If LED3 flashing or bright, indicates that pulse is sent to laser.
Using the embodiment of the present invention, displacement signal is changed into 90 degree of phase difference of X-axis pulse by differential-to-single-ended circuit
Signal and Y-axis pulse signal, host computer can send data command to single-chip microcontroller by level shifting circuit, and single-chip microcontroller can be to
Controller sends parallel data, and controller determines movable workbench distance according to X-axis pulse signal and Y-axis pulse signal, determines
The distance value that parallel data is characterized, judges whether movable workbench distance reaches the distance value that parallel data is characterized, if reaching
It arrives, then issues an electric pulse to pulse amplifying circuit, realize on numerical control X/Y plane working table movement curve, every one section
Fixed range issues an electric pulse；The electric pulse that controller is issued is exported after the amplification of pulse amplifying circuit to sharp
Light device reduces interference signal and improves frequency stability, so that effectively control laser issues a light pulse, thus real
Show and has uniformly occurred light pulse point on curve.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of laser control apparatus, which is characterized in that including host computer, single-chip microcontroller, differential-to-single-ended circuit, level conversion electricity
Road, controller, pulse amplifying circuit, laser, power circuit；Wherein, the single-chip microcontroller, the differential-to-single-ended circuit, institute
Level shifting circuit, the controller, the pulse amplifying circuit is stated to be electrically connected with the power circuit；
The differential-to-single-ended circuit, for receiving X-axis displacement signal and Y-axis displacement signal, by the X-axis displacement signal and institute
It states Y-axis displacement signal and is respectively converted into 90 degree of phase difference of X-axis pulse signal and 90 degree of phase difference of Y-axis pulse signal；By institute
It states X-axis pulse signal and the Y-axis pulse signal is input to the controller；The X-axis displacement signal and Y-axis displacement letter
Number for characterizing movable workbench distance；
The level shifting circuit, the data command sent for receiving the host computer, changes into level for the data command
Signal, and the level signal is sent to the single-chip microcontroller；
The single-chip microcontroller is converted into parallel data for receiving level signal, and by the received level signal of institute, by parallel data
It is sent to the controller；
The controller, for determining movable workbench distance according to the received X-axis pulse signal of institute and Y-axis pulse signal, really
Determine the distance value that parallel data is characterized, judges whether movable workbench distance reaches the distance value that parallel data is characterized, if
Reach, then issues electric pulse to pulse amplifying circuit；
The pulse amplifying circuit for amplifying the received electric pulse of institute, and amplified electric pulse is exported to institute
State laser；
The laser under the triggering for electric pulse after amplification, generates light pulse.
2. system according to claim 1, which is characterized in that X-axis displacement signal includes two-way X-axis displacement differential signal, Y
Axle position shifting signal includes two-way Y-axis displacement differential signal；
The differential-to-single-ended circuit includes X-axis displacement signal receiving end, Y-axis displacement signal receiving end and four MAX3490 cores
Piece；
X-axis displacement signal receiving end, for the received two-way X-axis displacement differential signal of institute to be separately input into two
MAX3490 chip；
Y-axis displacement signal receiving end, for the received two-way Y-axis displacement differential signal of institute to be separately input into another two
MAX3490 chip；
Every MAX3490 chip, for the received X-axis displacement differential signal of institute or Y-axis displacement differential signal to be changed into single-ended letter
Number, the single-ended signal changed into is input to the X-axis pulse input port or Y-axis pulse input port of the controller.
3. system according to claim 1, which is characterized in that
The level shifting circuit includes SP3232 chip, and the host computer is electrically connected with RS232 serial ports, the RS232 serial ports
The 2nd, 3 pins be electrically connected respectively with the 14th of the SP3232 chip, the 13rd pin, the 11st, the 12 of the SP3232 chip
Pin is electrically connected with the serial ports transmitting terminal of the single-chip microcontroller, serial ports receiving end respectively；
The data/address bus port of the controller, pulse enable port, test and work port switching respectively with the single-chip microcontroller
Data/address bus port, pulse enable port, test with work port switching it is corresponding be electrically connected；
The pulse amplifying circuit includes radio frequency interface and transport and placing device, the pulse output interface and the transport and placing device of the controller
Input terminal electrical connection, the output end of the transport and placing device is electrically connected with the input terminal of the radio frequency interface, the radio frequency interface
Output end passes through cable connection to the laser.
4. system according to claim 1, which is characterized in that
The level shifting circuit is also used to receive the test command that the host computer is sent, the survey that the host computer is sent
Examination order is sent to the single-chip microcontroller；
The single-chip microcontroller after being also used to receive the test command, generates test signal；And it is generated test signal is defeated
Enter to the controller；
The controller after being also used to receive the test signal, generates test pulse, generated test pulse is inputted
To the pulse amplifying circuit；
The pulse amplifying circuit is also used to amplify test pulse, and amplified test pulse is sent to the laser.
5. system according to claim 4, which is characterized in that the single-chip microcontroller and corresponding be equipped with of the controller are tested
Pulse port, the test pulse port of the single-chip microcontroller are electrically connected with the test pulse port of the controller.
6. system according to claim 3, which is characterized in that described device further includes auxiliary circuit, and auxiliary circuit includes
External interface, photoelectrical coupler, the first indicator light, the second indicator light and third indicator light；
The external interface the 1st, 3 pins difference external direct current power supply and external pulse enable signal, the external interface
2nd, 4 pins are grounded；
Series resistor between 3rd pin of the external interface and the 1st pin of the photoelectrical coupler；
The pulse of the controller enables interface and is electrically connected with the 4th pin of the photoelectrical coupler；The photoelectrical coupler
2nd pin is grounded after concatenating first indicator light；3rd pin of the photoelectrical coupler is grounded；
Second indicator light is electrically connected with the LED interface of the controller；The third indicator light and the radio frequency interface
Output end electrical connection.
7. system according to claim 1, which is characterized in that the power circuit include IB2405LS-1W chip and
AMS1117-3.3 chip；The controller is the CPLD chip of model EPM570.
8. system according to claim 6, which is characterized in that second indicator light is light emitting diode, the control
The cathode ground connection of positive, described second indicator light of the second indicator light is accessed after the port the LED series resistor of device.
9. system according to claim 1, which is characterized in that the single-chip microcontroller is STM32F103 chip.
10. system according to claim 3, which is characterized in that the transport and placing device is ADA4891 transport and placing device or AD826AN
Transport and placing device.
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| CN101585111A (en) * | 2008-05-23 | 2009-11-25 | 三菱电机株式会社 | Laser processing control device and laser processing device |
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