CN210129002U - Laser light power efficiency ratio measuring device of carbon dioxide laser - Google Patents
Laser light power efficiency ratio measuring device of carbon dioxide laser Download PDFInfo
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- CN210129002U CN210129002U CN201920399082.XU CN201920399082U CN210129002U CN 210129002 U CN210129002 U CN 210129002U CN 201920399082 U CN201920399082 U CN 201920399082U CN 210129002 U CN210129002 U CN 210129002U
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Abstract
The utility model provides a carbon dioxide laser's laser luminous power efficiency ratio measuring device, include the power supply current sampling circuit, the radio frequency forward and reverse power sampling circuit, the laser output luminous power sampling circuit, signal generator circuit and the laser instrument sampling parameter display screen that are connected with the central processing unit module. Through data acquisition of all parts, the laser sampling parameter display screen displays the power consumption power of the whole machine, the radio frequency excitation forward and reverse power, the laser output light power and the power comparison of the input power and the output laser in real time. The utility model discloses convenient to use shows accurately, greatly improves carbon dioxide laser debugging efficiency, through comparing of laser electric power, laser output luminous power, realizes the demonstration of photoelectric efficiency, is favorable to the photoelectric efficiency of the different lasers of quick identification.
Description
Technical Field
The utility model relates to a carbon dioxide laser device especially relates to a carbon dioxide laser's laser optical power efficiency ratio measuring device.
Background
In the production process of the existing carbon dioxide laser, electric power measurement and laser light power measurement are separated and provided by different systems. The signal generator triggering the carbon dioxide laser is also an independent signal board, when the production debugging is carried out, a plurality of different systems are required to be respectively used, the operation is very inconvenient, the efficiency of each carbon dioxide laser cannot be distinguished in time, and the debugging efficiency of the whole carbon dioxide laser is very low.
SUMMERY OF THE UTILITY MODEL
The utility model provides a carbon dioxide laser's laser light power efficiency ratio measuring device has solved the problem that laser light power efficiency ratio was measured, and its technical scheme is as follows:
a laser light power efficiency ratio measuring device of a carbon dioxide laser comprises a power supply current acquisition circuit, a radio frequency forward and reverse power acquisition circuit, a laser output light power acquisition circuit, a signal generator circuit and a laser sampling parameter display screen which are connected with a central processing unit module; the signal generator circuit drives the carbon dioxide laser to work according to the coded output pulse width signal of the coder under the participation of the central processor module, the voltage and current signal of the carbon dioxide laser is collected through the power supply current collecting circuit, the forward and reverse power of the radio frequency electric signal is measured in real time through the radio frequency forward and reverse power collecting circuit, the light average power of the output laser is measured in real time through the laser output light power collecting circuit, and the laser sampling parameter display screen displays the power consumption power of the whole machine, the radio frequency excitation forward and reverse power, the laser output light power, the power comparison of the input power and the output laser in real time.
The central processing unit module is also connected with a reserved communication interface which can communicate with a PC or a notebook computer so as to record equipment data.
The central processing unit module adopts an STC8A8K64S4A12 chip, the laser sampling parameter display screen adopts a display of TJC4827T043, the serial port 0 of the STC8A8K64S4A12 chip is connected with the serial port of the TJC4827T043, the serial port 0 is driven by PIN18 and PIN19, PIN18 is a signal receiving PIN of the serial port 0, and PIN19 is a serial port transmitting PIN of the serial port 0.
The reference voltage and analog ground processing circuit of the analog-to-digital converter of the STC8A8K64S4A12 chip adopts a chip TL 431.
The encoder adopts a rotary incremental encoder EC110202, the encoder and three groups of shaping circuits form an input circuit of the signal generator circuit, the shaping circuits adopt chips 74HC1G08, and the central processor module is connected to the encoder through the three groups of shaping circuits.
The central processing unit module outputs a laser pulse width modulation signal to the Schmitt trigger chip at a PIN27 PIN, and the laser pulse width signal is driven and isolated by the Schmitt trigger chip and then output to a signal socket of the laser to complete the pulse width modulation and driving of the laser, so that the laser can emit laser with controllable pulse width.
The current collection of the power current collection circuit comprises a power input socket, a current sampling circuit and a power output socket, and a sampling resistor of the current sampling circuit is arranged between the power socket input and the power output socket.
In the radio frequency forward and backward power processing circuit, the forward and backward power amplifying circuit of the laser radio frequency driving power supply adopts an amplifier LMH6643 and is connected with an output socket of the radio frequency power of the carbon dioxide laser.
In the laser output optical power measuring circuit, a laser optical power sensor connecting socket of a carbon dioxide laser is connected with an amplifier LMH6643, and the amplifier amplifies signals in the same direction, filters the amplified signals and outputs the filtered signals to a central processing unit module for analog data conversion.
The power supply used by the device adopts a power chip LT 3980.
The utility model provides a carbon dioxide laser's laser optical power efficiency ratio measuring device has following advantage:
1. the signal generator, the power of the power supply current, the radio frequency power in the positive direction and the negative direction and the output laser power are integrated on one circuit board, so that the operation is easy and clear.
2. The function of the signal generator is provided, and the light emitting proportion of the carbon dioxide laser can be adjusted.
3. And measuring the current power consumption of the carbon dioxide laser in real time.
4. And measuring the forward power and the reverse power of the radio frequency electric signal in real time according to the opening of the pulse width signal.
5. And measuring the light average power of the output laser in real time according to the opening of the pulse width signal.
6. List alignment: the current of the input power supply, the forward power and the reverse power of the radio frequency electric signal and the average power of the output laser.
7. The ratio of the input power supply to the output laser efficiency is directly displayed, which is beneficial to debugging the laser.
8. Photoelectric efficiency of different lasers can be identified rapidly, and production efficiency is improved.
The utility model discloses convenient to use shows accurately, greatly improves carbon dioxide laser debugging efficiency, through comparing of laser instrument electric power, laser instrument output optical power, realizes photoelectric conversion efficiency's demonstration.
Drawings
Fig. 1 is a block diagram of a device for measuring the laser light power efficiency ratio of a carbon dioxide laser provided by the present invention;
FIG. 2 is a schematic diagram of a CPU module and a signal generator according to the present invention;
fig. 3 is a schematic diagram of a processing circuit of the present invention for sampling signals;
FIG. 4 is a schematic diagram of the power supply of the present invention;
fig. 5 is a schematic diagram of the communication circuit with the PC according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will describe in detail the embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a supply current acquisition circuit 105, the positive reverse power acquisition circuit 106 of radio frequency, laser output optical power acquisition circuit 107, these three and central processing unit module 103 are connected, and central processing unit module 103 still is connected with reservation communication interface 102, signal generator circuit 104 and laser instrument sampling parameter display screen 101.
The reserved communication interface 102 may communicate with a PC or notebook to record device data. The central processing unit module 103 can comprehensively complete the work of signal acquisition, driving display, driving a signal generator, communication with a PC and the like. The signal generator circuit 104 can output a pulse width signal to drive the carbon dioxide laser to work according to the input of the encoder under the participation of the central processor module.
The direct current power supply used by the carbon dioxide laser firstly enters the power supply current acquisition circuit 105 and then is output to the carbon dioxide laser for the carbon dioxide laser to work. The real-time power of the power supply can be measured based on the output of the power supply current acquisition circuit 105. Under the control of the central processor module 103, the signal generator circuit 104 sends out a pulse width signal, and can adjust the light emitting ratio by adjusting the pulse width to drive the carbon dioxide laser to work. The utility model discloses according to opening of pulse width signal, through forward, the reverse power of the radio frequency signal of positive reverse power acquisition circuit 106 real-time measurement radio frequency, through the light average power of laser output light power acquisition circuit 107 real-time measurement output laser. The power consumption power of the whole machine, the radio frequency excitation forward and reverse power, the output light power of the laser and the power comparison of the input power and the output laser can be displayed in real time through the laser sampling parameter display screen 101.
The schematic diagram shown in fig. 2 includes: the central processing unit module 201 adopts an STC8A8K64S4a12 chip, which is a central processing unit, and an input and output circuit of the signal generator circuit.
The STC8 series single-chip microcomputer is a single-clock/machine period (1T) single-chip microcomputer produced by STC, the STC8 series single-chip microcomputer is a single-chip microcomputer without an external crystal oscillator and external reset, the 8051 single-chip microcomputer with ultra-strong anti-interference, ultra-low price, high speed and low power consumption as targets is an 8051 single-chip microcomputer, under the same working frequency, the STC8 series single-chip microcomputer is about 12 times faster than the conventional 8051 single-chip microcomputer, and an instruction code is completely compatible with the conventional 8051 single. MCU internal integration high accuracy R/C clock, MCU inside has 3 optional clock sources: the internal part is provided with a 24MHz high-precision IRC clock (which can be properly adjusted up or down), the internal part is provided with a 32KHz low-speed IRC, and the external part is provided with a 4M-33M crystal oscillator or an external clock signal. The MCU provides rich digital peripheral (4 serial ports, 5 timers, 4 groups of PCA, 8 groups of enhanced PWM and I2C, SPI) interfaces and analog peripheral (12-bit 15-way ultra-high-speed ADC and comparator with the speed of 800K, namely 80 ten thousand samples per second), and can meet the design requirements of vast users.
The laser sampling parameter display screen 101 adopts a display of TJC4827T043, using the reference numeral 202. The lcd 202 is a 4.3 inch 6.5 ten thousand color display screen with 480 × 272 resolution, contains a word stock, and is externally driven using a TTL level serial port.
The serial port 0 of the central processing unit 201 is driven by a PIN18 and a PIN19, wherein the PIN18 of the central processing unit 201 is a serial port signal receiving PIN, and the PIN19 is a serial port sending PIN of the serial port 0. Serial port 0 is coupled to receive serial ports of display screen 202. The display screen 202 can display several operating parameters of the laser under the drive of the serial port 0 of the central processing unit 201: the drive signal pulse width, input voltage, input current, radio frequency forward and reverse power, laser output power and input-output efficiency ratio.
204 is an input encoder of the signal generator circuit 104, a rotary incremental encoder EC110202 with a switch is used, the encoder 204, a first shaping circuit 205, a second shaping circuit 206 and a third shaping circuit 207 together form an input circuit of the signal generator circuit 104, and the first shaping circuit 205, the second shaping circuit 206 and the third shaping circuit 207 all adopt a chip 74HC1G 08.
The switch signal is led out from a PIN5 PIN of the encoder 204 to be connected to a PIN1 and a PIN2 of the 205, the switch signal is shaped by 74HC1G08 of the 205 and then is output from a PIN4 to be connected to a PIN31 PIN of the central processing unit 201, the other two-phase code signal is output from a PIN1 PIN and a PIN3 PIN of the encoder 204 to be connected to a PIN1 PIN and a PIN2 PIN of the 206 and the 207 PIN4 PIN, the switch signal is shaped by the two devices and then is output from the PIN4 PIN, the switch signal is respectively connected to a PIN29 PIN30 PIN of the central processing unit 201, a laser pulse width modulation signal is output from a PIN27 PIN to a PIN3 PIN of a PIN 208, the PIN 208 is a Schmitt trigger chip, the laser pulse width signal is driven and isolated by the PIN 208 and then is output from a PIN4 PIN1 PIN 209 of the signal socket of the laser, pulse width modulation.
As shown in fig. 3, the sampling circuit for several signals includes several circuits of 48V input voltage, input current, forward and reverse power of rf drive, and laser power of laser output.
301 is a voltage sampling circuit of laser power supply dc voltage 48 volts, the 48V voltage is divided by two resistors R10, R11, the capacitor C18 filters and outputs to PIN4 PIN of the central processing unit 201, and the digital signal is converted by the analog-digital converter, and after calibration by the central processing unit 201, the real-time working voltage value of the laser power supply is displayed on the display screen 202.
The power input socket 302, the current sampling circuit 303 and the power output socket 304 complete current sampling in the power current acquisition circuit 105. The power supply used by the carbon dioxide laser is firstly input to 302 by 302, passes through a sampling resistor R6 of a circuit 303, and is output to the carbon dioxide laser by a power supply output socket of 304. 303 is a piece of current detection chip AD8217, AD8217 is a high voltage, high resolution shunt amplifier, AD8217 provides excellent common mode rejection performance from 4.5V to 80V, and embeds an LDO, and it directly supplies power for the device from the high voltage rail. Therefore, as long as the input common mode range is 4.5V to 80V, no other power supply is needed.
The current sampling circuit 303, namely the PIN1 of the chip AD8217, is connected with an input high voltage, and supplies power to the device itself through an internal LDO, the R6 is connected in series in the direct current 48V as a shunt resistor, the PIN1 (in-phase input) and the PIN8 (reverse phase input) of the chip AD8217 complete current sampling together, the AD8217 amplifies a small differential input voltage generated by a load current flowing through the shunt resistor R6, the amplified signal is output by the PIN5 of the chip AD 303, and is output to the PIN3 of the central processing unit 201 after being filtered, and the PIN3 is an analog-to-digital conversion input PIN of the central processing unit 201, is converted by the central processing unit 201 at regular time, and is displayed in the display screen 202.
The control board of the device for measuring the laser light power efficiency ratio of the carbon dioxide laser is provided with an input socket for radio frequency forward and reverse power and a laser light power sensor connecting socket. The radio frequency power signal is taken out from the power amplifying circuit in the carbon dioxide laser and is connected to the input socket of the radio frequency power of the device. An independent laser power sensor is arranged at the front end of the laser output of the carbon dioxide laser and is connected to the control panel through a laser power sensor connecting socket.
The radio frequency forward and reverse power processing circuit comprises a forward and reverse power amplifying circuit of a laser radio frequency driving power supply. 305 is an input socket of radio frequency power, the forward and reverse power of a radio frequency power supply is taken out from the interior of the carbon dioxide laser through the socket and a connecting line, 307 and 308 are respectively a forward power amplifying circuit and a reverse power amplifying circuit of a laser radio frequency driving power supply, and a low-power-consumption rail-to-rail dual-path output amplifier LMH6643 is used.
The PIN1 PIN of 305 provides reverse radio frequency power, the signal is connected to the PIN5 of the amplifier 308 after being subjected to resistance voltage division, the PIN5 of the amplifier 308 is the equidirectional end of the amplifier and is used for carrying out equidirectional amplification of the signal, the amplified signal is output through the PIN7 PIN of 308 and is output through the resistor R40 to the analog input PIN9 of the central processing unit 201 for carrying out analog data conversion, and the analog data is displayed on the display screen 202 after being calibrated by the processor.
PIN3 of 305 is a forward radio frequency power input PIN, the signal enters the equidirectional input PIN5 of the amplifier 307 after being subjected to resistance voltage division, the signal amplified by the amplifier 307 is output to the analog input PIN8 of the central processing unit 201 through the resistor R35, analog data conversion is carried out, and the signal is displayed on a display screen.
The laser output optical power measuring circuit comprises an amplifier. 306 is laser optical power sensor connection socket, the analog signal of carbon dioxide laser optical power sensor is output to amplifier 309 through PIN2 of 306, amplifier 309 adopts the low-power consumption of LMH6643 similarly, rail-to-rail precision amplifier, the signal that 306 outputs is inputed to PIN3 of 309 after resistance voltage division, the syntropy input end of amplifier, carry out the conversion of analog data by PIN5 that resistance R16 exported central processing unit 201 after syntropy enlarging, and show on the display screen.
The utility model discloses concentrate these several signals and gather to show after analog-to-digital conversion. The specific efficiency and the light-emitting efficiency of the carbon dioxide laser can be obtained by dividing the output optical power by the input electric power, so that sufficient data support is provided for judging the quality of the laser, and the production of the laser with higher efficiency is facilitated.
As shown in fig. 4, the power supply circuit and the reserved communication circuit of the present invention are provided. The utility model discloses a power supply 401 is power chip LT3980, and LT3980 is high input voltage drop die mould stabiliser, wide input voltage scope: when the voltage-stabilizing circuit works, the voltage is 3.6V to 58V, the circuit can be protected to safely bear 80V transient voltage by the overvoltage locking function, and 2A maximum output current can be provided.
The utility model discloses in, 48v input power behind shunt resistance R6 inputs LT 3980's PIN14, and LT 3980's PIN4 foot is output voltage feedback foot, and at the voltage of LT 3980's PIN10 output, inputs feedback foot PIN4 behind resistance R4, R5 partial pressure, through the resistance value that changes these two resistances, just can change output voltage. In the embodiment of the device, R4 is 536 kOhm, R5 is 100 kOhm, so after passing through the voltage stabilizer, the PIN10 of the voltage stabilizer outputs +5v voltage for the whole device.
In fig. 5, the communication circuit between the device and the computer is completed using the RS232 line transceiver driver of the driver 402 and the socket 403. Driver 402 uses a piece of max3232E to convert the TTL level to a +15v to-15 v RS-232 level for output by socket 403. Wherein pin7 of driver 402 is a 232 level serial output and pin2 connected to 403 and pin8 of driver 402 is a 232 level serial input and connected to pin3 of 403. At the TTL level, pin10 of driver 402 is connected to pin37 of cpu 201, which is the output signal of serial port 3 of cpu 201, and pin9 of driver 402 is connected to pin36 of cpu 201, which is the input signal of serial port 3 of cpu 201. Thus, the serial port 3 of the central processing unit 201 is connected to the computer through 402 and 403, the communication with the computer or the notebook computer is completed, and the sampling data is transmitted to the computer.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a carbon dioxide laser's laser optical power efficiency ratio measuring device which characterized in that: the device comprises a power supply current sampling circuit, a radio frequency forward and reverse power sampling circuit, a laser output light power sampling circuit, a signal generator circuit and a laser sampling parameter display screen which are connected with a central processing unit module; the signal generator circuit drives the carbon dioxide laser to work according to the coded output pulse width signal of the encoder under the participation of the central processing unit module, the power supply voltage and the current signal of the carbon dioxide laser are collected through the power supply current collecting circuit, the forward power and the reverse power of the radio frequency electric signal are measured in real time through the radio frequency forward and reverse power sampling circuit, the light average power of the output laser is measured in real time through the laser output light power measuring circuit, and the laser sampling parameter display screen displays the power consumption power of the whole machine, the radio frequency excitation forward and reverse power, the laser output light power, the power of the input power supply and the power comparison of the output laser in real time.
2. The apparatus for measuring the laser light power efficiency ratio of a carbon dioxide laser according to claim 1, wherein: the central processing unit module is also connected with a reserved communication interface which can communicate with a PC or a notebook computer so as to record equipment data.
3. The apparatus for measuring the laser light power efficiency ratio of a carbon dioxide laser according to claim 1, wherein: the central processing unit module adopts an STC8A8K64S4A12 chip, the laser sampling parameter display screen adopts a display of TJC4827T043, the serial port 0 of the STC8A8K64S4A12 chip is connected with the serial port of the TJC4827T043, the serial port 0 is driven by PIN18 and PIN19, PIN18 is a signal receiving PIN of the serial port 0, and PIN19 is a serial port transmitting PIN of the serial port 0.
4. The apparatus for measuring the ratio of the power efficiency of laser light of a carbon dioxide laser according to claim 3, wherein: the reference voltage and analog ground processing circuit of the analog-to-digital converter of the STC8A8K64S4A12 chip adopts a chip TL 431.
5. The apparatus for measuring the laser light power efficiency ratio of a carbon dioxide laser according to claim 1, wherein: the encoder adopts a rotary incremental encoder EC110202, the encoder and three groups of shaping circuits form an input circuit of the signal generator circuit, the shaping circuits adopt chips 74HC1G08, and the central processor module is connected to the encoder through the three groups of shaping circuits.
6. The apparatus for measuring the ratio of the power efficiency of laser light of a carbon dioxide laser according to claim 5, wherein: the central processing unit module outputs a laser pulse width modulation signal to the Schmitt trigger chip at a PIN27 PIN, and the laser pulse width signal is driven and isolated by the Schmitt trigger chip and then output to a signal socket of the laser to complete the pulse width modulation and driving of the laser, so that the laser can emit laser with controllable pulse width.
7. The apparatus for measuring the laser light power efficiency ratio of a carbon dioxide laser according to claim 1, wherein: the current collection of the power current collection circuit comprises a power input socket, a current sampling circuit and a power output socket, and a sampling resistor of the current sampling circuit is arranged between the power input socket and the power output socket.
8. The apparatus for measuring the laser light power efficiency ratio of a carbon dioxide laser according to claim 1, wherein: in the radio frequency forward and reverse power processing circuit, the forward and reverse power amplifying circuits of the laser radio frequency driving power supply adopt an amplifier LMH6643 and are connected with an input socket of radio frequency power.
9. The apparatus for measuring the laser light power efficiency ratio of a carbon dioxide laser according to claim 1, wherein: in the laser output optical power measuring circuit, a laser optical power sensor connecting socket is connected with an amplifier LMH6643, and the amplifier amplifies signals in the same direction, filters the amplified signals and outputs the filtered signals to a central processing unit module for analog data conversion.
10. The apparatus for measuring the laser light power efficiency ratio of a carbon dioxide laser according to claim 1, wherein: the power supply used by the device adopts a power chip LT 3980.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920399082.XU CN210129002U (en) | 2019-03-27 | 2019-03-27 | Laser light power efficiency ratio measuring device of carbon dioxide laser |
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| CN201920399082.XU CN210129002U (en) | 2019-03-27 | 2019-03-27 | Laser light power efficiency ratio measuring device of carbon dioxide laser |
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| CN210129002U true CN210129002U (en) | 2020-03-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116400161A (en) * | 2023-06-09 | 2023-07-07 | 北京新科以仁科技发展有限公司 | Device calibration method, device and storage medium of laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116400161A (en) * | 2023-06-09 | 2023-07-07 | 北京新科以仁科技发展有限公司 | Device calibration method, device and storage medium of laser |
| CN116400161B (en) * | 2023-06-09 | 2023-08-18 | 北京新科以仁科技发展有限公司 | Device calibration method, device and storage medium of laser |
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