CN215576953U - Wireless control device of semiconductor laser - Google Patents
Wireless control device of semiconductor laser Download PDFInfo
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- CN215576953U CN215576953U CN202120502121.1U CN202120502121U CN215576953U CN 215576953 U CN215576953 U CN 215576953U CN 202120502121 U CN202120502121 U CN 202120502121U CN 215576953 U CN215576953 U CN 215576953U
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Abstract
The utility model relates to a wireless control device of a semiconductor laser, which comprises a wireless control component and a wireless receiving component; the wireless control assembly comprises a first microcontroller, a display and a first wireless serial port module; the display data output end of the first microcontroller is connected with the data input end of the display; the wireless receiving assembly comprises a second wireless serial port module, a second microcontroller, an FPGA, a semiconductor laser and a temperature control unit; the second microcontroller is connected with the FPGA through a parallel bus; the pulse signal output end of the FPGA is connected with the trigger end of the semiconductor laser; the temperature control unit is arranged in a box body of the semiconductor laser and is in communication connection with the FPGA; the first microcontroller and the second microcontroller are in communication connection through the first wireless serial port module and the second wireless serial port module.
Description
Technical Field
The utility model relates to the technical field of semiconductor lasers, in particular to a wireless control device of a semiconductor laser.
Background
The semiconductor Laser is also called a Laser Diode (LD), which uses a semiconductor material as a working substance, has advantages of small volume, long service life, high light emitting efficiency, and the like, can be driven by a simple current injection manner, has a working voltage and current compatible with an integrated circuit, and can be monolithically integrated with the integrated circuit. Therefore, semiconductor lasers have become the most practical and important laser at present, and have been widely used in optical fiber communication, light sensing, laser ranging, laser radar, and the like.
The semiconductor device is extremely sensitive to temperature change, the output stability of the laser can be influenced by the change of the working temperature, the working temperature of the laser is not controlled in the conventional semiconductor laser wireless control device, and when the working temperature of the laser is higher, the laser cannot stably output.
SUMMERY OF THE UTILITY MODEL
In view of the above analysis, the present invention is directed to a semiconductor laser wireless control device, which solves the problem of no temperature control in the conventional semiconductor laser wireless control device.
The purpose of the utility model is mainly realized by the following technical scheme:
a wireless control device of a semiconductor laser comprises a wireless control component and a wireless receiving component;
the wireless control assembly comprises a first microcontroller, a display and a first wireless serial port module; the display data output end of the first microcontroller is connected with the data input end of the display;
the wireless receiving assembly comprises a second wireless serial port module, a second microcontroller, an FPGA, a semiconductor laser and a temperature control unit; the second microcontroller is connected with the FPGA through a parallel bus; the pulse signal output end of the FPGA is connected with the trigger end of the semiconductor laser; the temperature control unit is arranged in a box body of the semiconductor laser and is in communication connection with the FPGA;
the first microcontroller and the second microcontroller are in communication connection through the first wireless serial port module and the second wireless serial port module.
Further, the temperature control unit comprises a D/A conversion circuit, a refrigeration driving circuit, a thermoelectric refrigerator and a temperature sensor; the input end of the D/A conversion circuit is connected with a temperature control data output pin of the FPGA, and the output end of the D/A conversion circuit is connected with the input end of the refrigeration driving circuit; the output end of the refrigeration driving circuit is connected with the input end of the thermoelectric refrigerator; and the data output end of the temperature sensor is connected with the temperature data input pin of the FPGA.
Furthermore, the second microcontroller is connected with the FPGA through a parallel bus, including that an 8-bit data bus pin of the second microcontroller is connected with an 8-bit data bus pin of the FPGA, and a 7-bit address bus pin of the second microcontroller is connected with a 7-bit address bus pin of the FPGA.
Further, the FPGA is connected with the semiconductor laser through a photoelectric coupler; the positive input end of the photoelectric coupler is connected with an electric pulse signal output pin of the FPGA, the negative input end of the photoelectric coupler is grounded through a first resistor, the positive output end of the photoelectric coupler is connected with a +5V power supply, and the negative output end of the photoelectric coupler is connected with the trigger end of the semiconductor laser; and the negative output end of the photoelectric coupler is also grounded through a second resistor.
Furthermore, the wireless receiving assembly further comprises a crystal oscillator, and a clock pin of the crystal oscillator is connected with a clock pin of the FPGA.
Furthermore, the wireless receiving assembly further comprises a work indication module, wherein the work indication module comprises a third resistor, a fourth resistor, a light emitting diode and a triode; the FPGA comprises an electric pulse signal indicating pin, one end of the third resistor is connected with the electric pulse signal indicating pin of the FPGA, and the other end of the third resistor is connected with the base electrode of the triode; the anode of the light emitting diode is connected with a power supply through the fourth resistor, and the cathode of the light emitting diode is connected with the collector of the triode; and the emitter of the triode is grounded.
Furthermore, the second microcontroller further comprises a reset circuit, and the output end of the reset circuit is connected with the reset pin of the second microcontroller.
Furthermore, the first wireless serial port module and the second wireless serial port module both adopt an E50-TTL-500 wireless serial port module.
Further, the D/a conversion circuit employs DAC 0832; the refrigeration driving circuit adopts DRV 593; the temperature sensor employs DS18B 20.
Further, the models of the first microcontroller and the second microcontroller are both LPC 1754; the FPGA is in the model number of EP1C3T100I 8N.
Compared with the prior art, the utility model can realize at least one of the following beneficial effects:
1. the temperature of the semiconductor laser is collected in real time through the temperature sensor and is sent to the wireless control assembly through wireless communication, and the display can display the received temperature data in real time, so that the wireless control end can conveniently monitor the working temperature of the semiconductor laser in real time;
2. the working temperature of the semiconductor laser is controlled by the temperature control unit, so that the semiconductor laser works in a stable temperature environment, and the semiconductor laser can stably output;
3. the wireless control assembly sets the temperature of the semiconductor laser in a wireless transmission mode, and the operation is simple and convenient.
In the utility model, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, wherein like reference numerals are used to designate like parts throughout.
Fig. 1 is a schematic structural diagram of a wireless control device of a semiconductor laser according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a wireless control device according to an embodiment of the present invention;
fig. 3 is a schematic circuit structure diagram of a second microcontroller, a second wireless serial port module and a part of FPGA according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of a partial circuit structure of an FPGA according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the D/A converter circuit and the refrigeration driving circuit according to the embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a power module in a wireless receiving assembly according to an embodiment of the utility model.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the utility model and together with the description, serve to explain the principles of the utility model and not to limit the scope of the utility model.
In an embodiment of the present invention, a wireless control device for a semiconductor laser is disclosed, as shown in fig. 1, including a wireless control module and a wireless receiving module.
Specifically, the wireless control assembly comprises a first microcontroller, a display and a first wireless serial port module; and the display data output end of the first microcontroller is connected with the data input end of the display. In practice, the first microcontroller may employ LPC1754, the display may employ LCD1602, and the first wireless serial module may employ E50-TTL-500 wireless serial module. The wireless control component circuit connection is as shown in fig. 2, and pins 51-55, 58-60 of the first microcontroller are connected with pins 14-8 of the display respectively. The 51-55 th and 58-60 th pins of the first microcontroller are general IO pins, and are used as display data output pins in implementation.
Specifically, the wireless receiving assembly comprises a second wireless serial port module, a second microcontroller, an FPGA, a semiconductor laser and a temperature control unit. When the wireless serial port module is implemented, the second microcontroller can adopt LPC1754, the FPGA can adopt EP1C3T100I8N, the second wireless serial port module can adopt an E50-TTL-500 wireless serial port module, and the semiconductor laser adopts a trigger type semiconductor laser.
Specifically, the second microcontroller is connected with the FPGA through a parallel bus, an 8-bit data bus pin of the second microcontroller is connected with an 8-bit data bus pin of the FPGA, and a 7-bit address bus pin of the second microcontroller is connected with a 7-bit address bus pin of the FPGA. As shown in FIG. 3 and FIG. 4, in the implementation, the 51-55 th pins and 58-60 th pins of the second microcontroller are used as data bus pins of the parallel bus and are respectively connected with the 92-85 th pins of the FPGA, the 64-61 th pins and 46-44 th pins of the second microcontroller are used as address bus pins of the parallel bus and are respectively connected with the 84 th pins, 79-77 th pins, 100 th pins and 1-2 th pins of the FPGA, namely D0-D7 is an 8-bit data bus, and A0-A7 is an address line 7. It should be noted that, the 92 th to 85 th pins of the FPGA are general IO pins, and are used as data bus pins in implementation, and the 84 th pins, 79 th to 77 th pins, 100 th pins, and 1 st to 2 nd pins of the FPGA are general IO pins, and are used as address bus pins in implementation; the 51 st to 55 th pins and 58 th to 60 th pins of the second microcontroller are general IO pins and are used as data bus pins during implementation; the 64 th-61 th pin and the 46 th-44 th pin of the second microcontroller are all universal IO pins, and are used as address bus pins in implementation
The pulse signal output end of the FPGA is connected to the trigger end of the semiconductor laser, and in implementation, a general IO pin of the FPGA is used as the pulse signal output end, for example, the 25 th pin.
Specifically, in order to improve the signal stability, the FPGA is connected to the trigger end of the semiconductor laser through a photoelectric coupler U1; the positive input end of a photoelectric coupler U1 is connected with an electric pulse signal output pin of the FPGA, the negative input end of the photoelectric coupler is grounded through a first resistor R16, the positive output end of the photoelectric coupler is connected with a +5V power supply, and the negative output end of the photoelectric coupler is connected with the trigger end of the semiconductor laser; the negative output end of the photoelectric coupler is also grounded through a second resistor R15.
Since the semiconductor laser is susceptible to temperature and cannot stably operate, a specific embodiment of the present invention provides a semiconductor laser wireless control device including a temperature control unit to operate the semiconductor laser in a stable temperature environment. The temperature control unit is arranged in the box body of the semiconductor laser, and the temperature control unit is in communication connection with the FPGA.
Specifically, the temperature control unit comprises a D/A conversion circuit, a refrigeration driving circuit, a thermoelectric refrigerator and a temperature sensor.
The temperature sensor is used for collecting the temperature in the semiconductor laser case in real time and sending temperature data to the FPGA. For example, as shown in fig. 3, the temperature sensor employs DS18B20, a DQ pin of the temperature sensor is connected to a 24 th pin of the FPGA, and the 24 th pin of the FPGA is a general IO pin, and is used as a temperature data input pin in implementation.
The refrigeration driving circuit is used for driving the thermoelectric refrigerator, the output end of the refrigeration driving circuit is connected with the input end of the thermoelectric refrigerator, when the refrigeration driving circuit is implemented, the refrigeration driving circuit can adopt DRV593, the circuit structure is shown in figure 5, a PWM pin of the DRV593 is connected with the negative electrode of the thermoelectric refrigerator, and an H/C pin of the DRV593 is connected with the positive electrode of the thermoelectric refrigerator. The thermoelectric refrigerator can adopt a semiconductor refrigerator of C0502 type.
The input of the DRV593 is a DC voltage control signal, and when the DRV593 is driven by processing the signal by adopting the FPGA, a D/A conversion circuit is required to be added between the DRV593 and the FPGA. IN implementation, the D/a conversion circuit adopts DAC0832, the circuit structure is as shown IN fig. 5, the input end of the D/a conversion circuit is connected to the temperature control data output pin of the FPGA, the output end of the D/a conversion circuit, i.e., Iout11 pin, is connected to the input end of the refrigeration driving circuit, i.e., IN + pin, and IN implementation, the 34 th to 41 th pins of the FPGA are used as the temperature control data output pins and are respectively connected to the 7 th to 4 th pins and the 16 th to 13 th pins of the DAC 0832. The 34 th-41 th pins of the FPGA are general IO pins, and are used as temperature control data output pins during implementation.
The first microcontroller and the second microcontroller are in communication connection through the first wireless serial port module and the second wireless serial port module.
When the wireless receiving assembly is implemented, the wireless receiving assembly further comprises a crystal oscillator, and a clock pin of the crystal oscillator is connected with a clock pin of the FPGA to provide accurate time information for the device.
In implementation, the second microcontroller further includes a reset circuit, as shown in fig. 3, the reset circuit may employ a MAX811 chip, and an output terminal of the reset circuit, i.e., a 2 nd pin, is connected to a reset pin, i.e., a 14 th pin, of the second microcontroller.
In practice, the wireless receiving assembly further includes an operation indication module, as shown in fig. 4, including a third resistor R14, a fourth resistor R13, a light emitting diode PLUS1, and a transistor Q1; the FPGA comprises an electric pulse signal indicating pin, namely a 26 th pin, wherein the 26 th pin of the FPGA is a universal IO pin and is used as the electric pulse signal indicating pin during implementation. One end of the third resistor R14 is connected with an electric pulse signal indicating pin of the FPGA, and the other end is connected with the base electrode of the triode Q1; the anode of the light emitting diode PLUS1 is connected with a power supply through a fourth resistor R13, and the cathode of the light emitting diode PLUS1 is connected with the collector of the triode Q1; the emitter of transistor Q1 is connected to ground. The work indication module is used for displaying whether the semiconductor laser is in controlled work currently.
In practice, the wireless receiving assembly further includes a power module for supplying power to the wireless receiving assembly, and a circuit of the power module is shown in fig. 6.
During implementation, the first microcontroller sends a temperature set value to the second microcontroller through the wireless serial port module, the second microcontroller sends the temperature set value to the FPGA, the FPGA compares the temperature data collected by the temperature sensor with the temperature set value, the thermoelectric refrigerator is driven to refrigerate or heat by adopting a PID control method, so that the working temperature of the semiconductor laser is stabilized at the set temperature, meanwhile, the FPGA sends the temperature data collected by the temperature sensor to the wireless control assembly through the wireless serial port, the current working temperature of the semiconductor laser is displayed through the display, and the wireless control end can monitor the working temperature condition of the semiconductor laser in real time. The PID control method adopted by the FPGA is a common method in the prior art, and if the existing PID control method is operated in the FPGA, the utility model does not relate to any improvement in software.
Compared with the prior art, the semiconductor laser wireless control device provided by the embodiment has the following beneficial effects:
1. the temperature of the semiconductor laser is collected in real time through the temperature sensor and is sent to the wireless control assembly through wireless communication, and the display can display the received temperature data in real time, so that the wireless control end can conveniently monitor the working temperature of the semiconductor laser in real time;
2. the working temperature of the semiconductor laser is controlled by the temperature control unit, so that the semiconductor laser works in a stable temperature environment, and the semiconductor laser can stably output;
3. the wireless control assembly sets the temperature of the semiconductor laser in a wireless transmission mode, and the operation is simple and convenient.
Those skilled in the art can understand that the PID control method related to the FPGA in the above embodiment is a common method in the prior art, for example, the existing PID control method is operated in the FPGA, and the present invention does not involve any software improvement. The utility model only needs to connect the devices with corresponding functions through the connection relation given by the embodiment of the utility model, and does not relate to any improvement in program software. The connection mode between the hardware devices with the corresponding functions is realized by the prior art by those skilled in the art, and is not described in detail herein.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A semiconductor laser wireless control device is characterized by comprising a wireless control component and a wireless receiving component;
the wireless control assembly comprises a first microcontroller, a display and a first wireless serial port module; the display data output end of the first microcontroller is connected with the data input end of the display;
the wireless receiving assembly comprises a second wireless serial port module, a second microcontroller, an FPGA, a semiconductor laser and a temperature control unit; the second microcontroller is connected with the FPGA through a parallel bus; the pulse signal output end of the FPGA is connected with the trigger end of the semiconductor laser; the temperature control unit is arranged in a box body of the semiconductor laser and is in communication connection with the FPGA;
the first microcontroller and the second microcontroller are in communication connection through the first wireless serial port module and the second wireless serial port module.
2. The wireless control device of semiconductor lasers according to claim 1, wherein the temperature control unit includes a D/a conversion circuit, a cooling drive circuit, a thermoelectric cooler, and a temperature sensor; the input end of the D/A conversion circuit is connected with a temperature control data output pin of the FPGA, and the output end of the D/A conversion circuit is connected with the input end of the refrigeration driving circuit; the output end of the refrigeration driving circuit is connected with the input end of the thermoelectric refrigerator; and the data output end of the temperature sensor is connected with the temperature data input pin of the FPGA.
3. A semiconductor laser wireless control device according to claim 2, wherein the second microcontroller is connected to the FPGA through a parallel bus, including 8-bit data bus pins of the second microcontroller connected to 8-bit data bus pins of the FPGA; and 7-bit address bus pins of the second microcontroller are connected with 7-bit address bus pins of the FPGA.
4. The wireless control device of semiconductor lasers according to claim 1, wherein the FPGA is connected to the semiconductor laser through a photo coupler; the positive input end of the photoelectric coupler is connected with an electric pulse signal output pin of the FPGA, the negative input end of the photoelectric coupler is grounded through a first resistor, the positive output end of the photoelectric coupler is connected with a +5V power supply, and the negative output end of the photoelectric coupler is connected with the trigger end of the semiconductor laser; and the negative output end of the photoelectric coupler is also grounded through a second resistor.
5. The wireless control device of semiconductor lasers according to claim 1, wherein the wireless receiving assembly further comprises a crystal oscillator, and a clock pin of the crystal oscillator is connected with a clock pin of the FPGA.
6. The wireless control device of semiconductor lasers according to claim 1, wherein said wireless receiving module further comprises an operation indication module, said operation indication module comprises a third resistor, a fourth resistor, a light emitting diode and a triode; the FPGA comprises an electric pulse signal indicating pin, one end of the third resistor is connected with the electric pulse signal indicating pin of the FPGA, and the other end of the third resistor is connected with the base electrode of the triode; the anode of the light emitting diode is connected with a power supply through the fourth resistor, and the cathode of the light emitting diode is connected with the collector of the triode; and the emitter of the triode is grounded.
7. A semiconductor laser wireless control device according to claim 1, wherein the second microcontroller further comprises a reset circuit, an output of the reset circuit being connected to a reset pin of the second microcontroller.
8. The wireless control device of semiconductor laser as claimed in claim 1 wherein said first wireless serial port module and said second wireless serial port module both use E50-TTL-500 wireless serial port modules.
9. The wireless control device of semiconductor lasers according to claim 2, characterized in that the D/a conversion circuit employs DAC 0832; the refrigeration driving circuit adopts DRV 593; the temperature sensor employs DS18B 20.
10. A semiconductor laser wireless control device as claimed in claim 1 wherein the first and second microcontrollers are each model LPC 1754; the FPGA is in the model number of EP1C3T100I 8N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120502121.1U CN215576953U (en) | 2021-03-05 | 2021-03-05 | Wireless control device of semiconductor laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120502121.1U CN215576953U (en) | 2021-03-05 | 2021-03-05 | Wireless control device of semiconductor laser |
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| Publication Number | Publication Date |
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| CN215576953U true CN215576953U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120502121.1U Active CN215576953U (en) | 2021-03-05 | 2021-03-05 | Wireless control device of semiconductor laser |
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