CN107290134A - A kind of high power CW optical fiber laser light alignment detection circuit - Google Patents
A kind of high power CW optical fiber laser light alignment detection circuit Download PDFInfo
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- CN107290134A CN107290134A CN201710483438.3A CN201710483438A CN107290134A CN 107290134 A CN107290134 A CN 107290134A CN 201710483438 A CN201710483438 A CN 201710483438A CN 107290134 A CN107290134 A CN 107290134A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of high power CW optical fiber laser light alignment detection circuit, belong to fiber laser technology field, the invention discloses a kind of high power CW optical fiber laser light alignment detection circuit, belong to fiber laser technology field, quasi-continuous lasing modulation Transistor-Transistor Logic level circuit, modulation Transistor-Transistor Logic level turn constant Transistor-Transistor Logic level circuit, continuous laser and turn Transistor-Transistor Logic level circuit, shaping comparison circuit and continuous laser and quasi-continuous lasing electric signal combiner circuit.The present invention, which is realized, changes into the continuous laser of high power CW optical fiber laser and quasi-continuous lasing signal with two photo-detector diodes Transistor-Transistor Logic level signal constant all the way, it can be detected with an I/O of single-chip microcomputer, judge whether light path has damage, avoid collection of the single-chip microcomputer to modulated signal, excessive occupying system resources.
Description
Technical field
The invention belongs to fiber laser technology field, and in particular to a kind of high power CW optical fiber laser light path detection
Circuit.
Background technology
High power CW optical fiber laser has a wide range of applications in cutting, welding, drilling field.
In order to prevent high power CW optical fiber laser after light path goes wrong, continue light extraction and burning caused to light path,
Light path is needed to detect circuit protection.
The content of the invention
For above-mentioned technical problem present in prior art, the present invention proposes a kind of high power CW optical fiber laser
Light alignment detection circuit, it is reasonable in design, the deficiencies in the prior art are overcome, with good effect.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of high power CW optical fiber laser light alignment detection circuit, including：Quasi-continuous lasing modulation Transistor-Transistor Logic level electricity
Road, modulation Transistor-Transistor Logic level turn constant Transistor-Transistor Logic level circuit, continuous laser and turn Transistor-Transistor Logic level circuit, shaping comparison circuit and continuously swash
Light and quasi-continuous lasing electric signal combiner circuit；
Quasi-continuous lasing modulation Transistor-Transistor Logic level circuit, is configured for quasi-continuous lasing signal being converted into the TTL of modulation
Level signal；
Modulate Transistor-Transistor Logic level and turn constant Transistor-Transistor Logic level circuit, including Retargetable compiler monostable flipflop, be configured for adjusting
The Transistor-Transistor Logic level signal of system is converted into constant Transistor-Transistor Logic level signal；
Continuous laser turns Transistor-Transistor Logic level circuit, is configured for continuous laser signal being converted into Transistor-Transistor Logic level signal；
Shaping comparison circuit, including comparator, are configured for the continuous T TL electricity that continuous light turns Transistor-Transistor Logic level circuit conversion
Ordinary mail number carries out shaping comparison；
Continuous laser and quasi-continuous lasing electric signal combiner circuit, including OR gate, are configured for modulation Transistor-Transistor Logic level electricity
Road turns the constant Transistor-Transistor Logic level signal and the continuous T TL level signals after shaping comparison circuit of constant Transistor-Transistor Logic level circuit conversion
It is converted into Transistor-Transistor Logic level all the way；
Quasi-continuous lasing modulation Transistor-Transistor Logic level circuit includes the first photo-detector diode, the first direct current 5V power supplys, second
Direct current 5V power supplys, the first triode, the second triode, the first adjustable resistance, first resistor and second resistance；First Photoelectric Detection
The negative electrode of diode is connected with the first direct current 5V power supplys, and one end of the first adjustable resistance and its adjustable end link together and first
The anode composition common port of photo-detector diode is connected to the base stage of the second triode, one end of first resistor and second resistance
One end composition common port be connected to the colelctor electrode group of the second direct current 5V power supplys, the other end of first resistor and the second triode
The base stage of the first triode, the colelctor electrode connection of the other end of second resistance and the first triode, first are connected into common port
The emitter stage composition common port of the other end of adjustable resistance, the emitter stage of the first triode and the second triode is connected to the ground；
Continuous laser, which turns Transistor-Transistor Logic level circuit, includes the second photo-detector diode, the 3rd direct current 5V power supplys, the 4th direct current 5V
Power supply, the 3rd triode, the 4th triode, the second adjustable resistance, 3rd resistor and the 4th resistance；Second photo-detector diode
Negative electrode be connected with the 3rd direct current 5V power supplys, one end of the second adjustable resistance and its adjustable end link together and the inspection of the second photoelectricity
The anode composition common port for surveying diode is connected to one end of the base stage of the 4th triode, one end of 3rd resistor and the 4th resistance
Composition common port is connected to the 4th direct current 5V power supplys, and the colelctor electrode composition of the other end of 3rd resistor and the 4th triode is public
End is connected to the base stage of the 3rd triode, the colelctor electrode connection of the other end and the 3rd triode of the 4th resistance, the second adjustable electric
The emitter stage composition common port of the other end of resistance, the emitter stage of the 3rd triode and the 4th triode is connected to the ground；
Preferably, the Retargetable compiler monostable flipflop uses 74LVC1G123 chips.
Preferably, the RC time constants of the Retargetable compiler monostable flipflop are more than the modulation after quasi-continuous lasing is changed
The cycle of Transistor-Transistor Logic level.
Preferably, the comparator uses TLV3501AIDB chips.
Preferably, the OR gate uses 74LVC1G32GV chips.
Preferably, the first adjustable resistance, is configurable for adjusting the threshold value of quasi-continuous smooth modulation Transistor-Transistor Logic level circuit；
Second adjustable resistance, is configurable for adjusting the threshold value that continuous light turns continuous T TL level circuits.
When the first photo-detector diode receives the laser of modulation, the Transistor-Transistor Logic level of a modulation is exported, by can touch again
Bill steady state trigger exports a constant TTL high level；When the first photo-detector diode receives continuous laser, export
One constant TTL high level, a constant TTL low levels are exported by Retargetable compiler monostable flipflop；
When the second photo-detector diode receives the laser of modulation, the Transistor-Transistor Logic level signal of a modulation is exported；When second
Photo-detector diode receives continuous laser, exports a constant TTL high level.
Operation principle of the present invention：
When high power CW optical fiber laser exports quasi-continuous lasing, pass through quasi-continuous lasing modulation Transistor-Transistor Logic level electricity
Road and modulation Transistor-Transistor Logic level circuit turn the circuit of constant Transistor-Transistor Logic level circuit composition, constant TTL high level are converted into, by continuous
Laser turns the circuit of Transistor-Transistor Logic level circuit and shaping comparison circuit composition, is converted into the Transistor-Transistor Logic level of modulation, constant TTL high level
Pass through continuous laser and quasi-continuous lasing electric signal combiner circuit with the Transistor-Transistor Logic level of modulation, export constant TTL high level；
When high power CW optical fiber laser exports continuous laser, quasi-continuous lasing modulation Transistor-Transistor Logic level circuit and tune
Transistor-Transistor Logic level circuit processed turns the circuit of constant Transistor-Transistor Logic level circuit composition, is converted into constant TTL low levels, is turned by continuous laser
The circuit of Transistor-Transistor Logic level circuit and shaping comparison circuit composition, is converted into constant TTL high level, constant TTL low levels and perseverance
Fixed TTL high level passes through continuous laser and quasi-continuous lasing electric signal combiner circuit, exports constant TTL high level；
After high power CW optical fiber laser light path is damaged, quasi-continuous lasing modulation Transistor-Transistor Logic level circuit and modulation TTL
The circuit and continuous laser that level circuit turns constant Transistor-Transistor Logic level circuit composition turn Transistor-Transistor Logic level circuit and shaping comparison circuit group
Into circuit, export constant TTL low levels, constant TTL low levels pass through continuous laser and quasi-continuous lasing electric signal
Combiner circuit, exports constant TTL low levels；
When the I/O of single-chip microcomputer detects constant TTL low levels, can close the light extraction of high power CW optical fiber laser makes
Can, it is to avoid the burning of laser.
The advantageous effects that the present invention is brought：
By the present invention, realize the continuous light of high power CW optical fiber laser with two photo-detector diodes and
Quasi-continuous optical signal changes into Transistor-Transistor Logic level signal constant all the way, can be detected with a MCU IO, judge whether light path has
Damage, it is to avoid collection of the single-chip microcomputer to modulated signal, excessive occupying system resources.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of high power CW optical fiber laser light alignment detection circuit.
Fig. 2 is that a kind of high power CW optical fiber laser light path detects circuit theory diagrams.
Wherein, the quasi-continuous smooth modulation Transistor-Transistor Logic level circuits of 1-；2- modulation Transistor-Transistor Logic level circuits turn constant Transistor-Transistor Logic level circuit；
3- continuous lasers turn Transistor-Transistor Logic level circuit；4- shaping comparison circuits；The continuous light of 5- and quasi-continuous photosignal combiner circuit.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to the present invention：
As shown in figure 1, a kind of high power CW optical fiber laser light alignment detection circuit, including quasi-continuous lasing modulation system
Transistor-Transistor Logic level circuit 1, modulation Transistor-Transistor Logic level circuit turn constant Transistor-Transistor Logic level circuit 3, continuous laser and turn Transistor-Transistor Logic level circuit 2, shaping ratio
Compared with circuit 4, continuous laser and quasi-continuous lasing electric signal combiner circuit 5.
Quasi-continuous lasing modulation Transistor-Transistor Logic level circuit 1 include the first photo-detector diode PD1, the first direct current 5V power supplys,
Second direct current 5V power supplys, the first triode Q1, the second triode Q2, the first adjustable resistance R23, first resistor R2 and second resistance
R7；First photo-detector diode PD1 negative electrode is connected with the first direct current 5V power supplys, the first adjustable resistance R23 one end and its
Adjustable end, which links together, is connected to the second triode Q2 base with the first photo-detector diode PD1 anode composition common port
Pole, first resistor R2 one end and second resistance R7 one end composition common port are connected to the second direct current 5V power supplys, first resistor
The R2 other end and the second triode Q2 colelctor electrode composition common port are connected to the first triode Q1 base stage, second resistance
The R7 other end and the first triode Q1 colelctor electrode connection, the first adjustable resistance R23 other end, the first triode Q1 hair
Emitter-base bandgap grading and the second triode Q2 emitter stage composition common port are connected to the ground.
Continuous laser, which turns Transistor-Transistor Logic level circuit 2, includes the second photo-detector diode PD2, the 3rd direct current 5V power supplys, the 4th straight
Flow 5V power supplys, the 3rd triode Q3, the 4th triode Q4, the second adjustable resistance R27,3rd resistor R25 and the 4th resistance R24；
Second photo-detector diode PD2 negative electrode is connected with the 3rd direct current 5V power supplys, and the second adjustable resistance R27 one end is adjustable with its
End, which links together, is connected to the 4th triode Q4 base stage with the second photo-detector diode PD2 anode composition common port,
3rd resistor R25 one end and the 4th resistance R24 one end composition common port are connected to the 4th direct current 5V power supplys, 3rd resistor
The R25 other end and the 4th triode Q4 colelctor electrode composition common port are connected to the 3rd triode Q3 base stage, the 4th electricity
Hinder the colelctor electrode connection of the R24 other end and the 3rd triode Q3, the second adjustable resistance R27 other end, the 3rd triode Q3
Emitter stage and the 4th triode Q4 emitter stage composition common port be connected to the ground.
When PD1 receives the laser of modulation, the Transistor-Transistor Logic level of a modulation is exported, by Retargetable compiler monostable flipflop
U2 (74LVC1G123) exports a constant TTL high level；When PD1 receives continuous laser, one constant TTL of output is high
Level, a constant TTL low levels are exported by Retargetable compiler monostable flipflop U2 (74LVC1G123).
When PD2 receives the laser of modulation, the Transistor-Transistor Logic level signal of a modulation is exported；Continuously swash when PD2 is received
Light, exports a constant TTL high level.
The signal that continuous light turns the output of Transistor-Transistor Logic level circuit 2 exports mark after high-speed comparator U6 (TLV3501AIDB) shaping
Accurate TTL high level/TTL modulated signals.
By Retargetable compiler monostable flipflop U2 (74LVC1G123) Transistor-Transistor Logic levels exported and through high-speed comparator U6
(TLV3501AIDB) Transistor-Transistor Logic level exported after shaping synthesizes Transistor-Transistor Logic level constant all the way by U7 (74LVC1G32GV).
When high power CW optical fiber laser exports quasi-continuous lasing, pass through the quasi-continuous lasing modulation TTL in Fig. 1
Level circuit 1 and modulation Transistor-Transistor Logic level circuit turn the circuit that constant Transistor-Transistor Logic level circuit 3 is constituted, and are converted into constant TTL high level,
The circuit that Transistor-Transistor Logic level circuit 2 and shaping comparison circuit 4 are constituted is turned by the continuous laser in Fig. 1, the TTL electricity of modulation is converted into
Flat, the circuit that the continuous laser and quasi-continuous lasing electric signal combiner circuit 5 that two Transistor-Transistor Logic levels pass through in Fig. 1 are constituted is output as
Constant TTL high level.
When high power CW optical fiber laser exports continuous laser, pass through the quasi-continuous smooth modulation Transistor-Transistor Logic level in Fig. 1
Circuit 1 and modulation Transistor-Transistor Logic level circuit turn the circuit that constant Transistor-Transistor Logic level circuit 3 is constituted, and are converted into constant TTL low levels, pass through
Continuous light in Fig. 1 turns the circuit that Transistor-Transistor Logic level circuit 2 and shaping comparison circuit 4 are constituted, and is converted into constant TTL high level, two
The circuit that the continuous laser and quasi-continuous lasing electric signal combiner circuit 5 that individual Transistor-Transistor Logic level passes through in Fig. 1 are constituted, is output as constant
TTL high level.
After high power CW optical fiber laser light path is damaged, the quasi-continuous smooth He of modulation Transistor-Transistor Logic level circuit 1 in Fig. 1
Modulate Transistor-Transistor Logic level circuit and turn the circuit that constant Transistor-Transistor Logic level circuit 3 is constituted, continuous light turns Transistor-Transistor Logic level circuit 2 and shaping is more electric
The circuit that road 4 is constituted exports constant TTL low levels, and the circuit for 5 compositions that two Transistor-Transistor Logic levels pass through in Fig. 1 is exported constant
TTL low levels.
When the I/O of single-chip microcomputer detects constant TTL low levels, can close the light extraction of high power CW optical fiber laser makes
Can, it is to avoid the burning of laser.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made in the essential scope of the present invention, should also belong to the present invention's
Protection domain.
Claims (6)
1. a kind of high power CW optical fiber laser light alignment detection circuit, it is characterised in that including：Quasi-continuous lasing modulation system
Transistor-Transistor Logic level circuit, modulation Transistor-Transistor Logic level turn constant Transistor-Transistor Logic level circuit, continuous laser turn Transistor-Transistor Logic level circuit, shaping comparison circuit with
And continuous laser and quasi-continuous lasing electric signal combiner circuit；
Quasi-continuous lasing modulation Transistor-Transistor Logic level circuit, is configured for quasi-continuous lasing signal being converted into the Transistor-Transistor Logic level of modulation
Signal；
Modulate Transistor-Transistor Logic level and turn constant Transistor-Transistor Logic level circuit, including Retargetable compiler monostable flipflop, be configured for modulation
Transistor-Transistor Logic level signal is converted into constant Transistor-Transistor Logic level signal；
Continuous laser turns Transistor-Transistor Logic level circuit, is configured for continuous laser signal being converted into Transistor-Transistor Logic level signal；
Shaping comparison circuit, including comparator, are configured for the continuous T TL level that continuous laser turns Transistor-Transistor Logic level circuit conversion
Signal carries out shaping comparison；
Continuous laser and quasi-continuous lasing electric signal combiner circuit, including OR gate, are configured for turning in modulation Transistor-Transistor Logic level circuit
The constant Transistor-Transistor Logic level signal of constant Transistor-Transistor Logic level circuit conversion and the continuous T TL level signals conversion after shaping comparison circuit
Into Transistor-Transistor Logic level all the way；
Quasi-continuous lasing modulation Transistor-Transistor Logic level circuit includes the first photo-detector diode, the first direct current 5V power supplys, the second direct current
5V power supplys, the first triode, the second triode, the first adjustable resistance, first resistor and second resistance；The pole of first Photoelectric Detection two
The negative electrode of pipe is connected with the first direct current 5V power supplys, and one end of the first adjustable resistance and its adjustable end link together and the first photoelectricity
The anode composition common port of detection diode is connected to the base stage of the second triode, one end of first resistor and the one of second resistance
End composition common port is connected to the colelctor electrode composition public affairs of the second direct current 5V power supplys, the other end of first resistor and the second triode
End is connected to the base stage of the first triode altogether, the colelctor electrode connection of the other end of second resistance and the first triode, and first is adjustable
The emitter stage composition common port of the other end of resistance, the emitter stage of the first triode and the second triode is connected to the ground；
Continuous laser, which turns Transistor-Transistor Logic level circuit, includes the second photo-detector diode, the 3rd direct current 5V power supplys, the 4th direct current 5V electricity
Source, the 3rd triode, the 4th triode, the second adjustable resistance, 3rd resistor and the 4th resistance；Second photo-detector diode
Negative electrode is connected with the 3rd direct current 5V power supplys, and one end of the second adjustable resistance and its adjustable end link together and the second Photoelectric Detection
The anode composition common port of diode is connected to one end group of the base stage of the 4th triode, one end of 3rd resistor and the 4th resistance
The colelctor electrode composition common port of the 4th direct current 5V power supplys, the other end of 3rd resistor and the 4th triode is connected into common port
It is connected to the base stage of the 3rd triode, the colelctor electrode connection of the other end and the 3rd triode of the 4th resistance, the second adjustable resistance
The other end, the emitter stage composition common port of the emitter stage of the 3rd triode and the 4th triode is connected to the ground；
When PD1 receives the laser of modulation, the Transistor-Transistor Logic level of a modulation is exported, is exported by Retargetable compiler monostable flipflop
One constant TTL high level；When PD1 receives continuous laser, a constant TTL high level is exported, by Retargetable compiler
Monostable flipflop exports a constant TTL low levels；
When PD2 receives the laser of modulation, the Transistor-Transistor Logic level signal of a modulation is exported；It is defeated when PD2 receives continuous laser
Go out a constant TTL high level；
When high power CW optical fiber laser export quasi-continuous lasing when, by quasi-continuous lasing modulation Transistor-Transistor Logic level circuit with
The circuit that Transistor-Transistor Logic level circuit turns constant Transistor-Transistor Logic level circuit composition is modulated, constant TTL high level is converted into, passes through continuous laser
Turn the circuit of Transistor-Transistor Logic level circuit and shaping comparison circuit composition, be converted into the Transistor-Transistor Logic level of modulation, constant TTL high level and tune
The Transistor-Transistor Logic level of system passes through continuous laser and quasi-continuous lasing electric signal combiner circuit, exports constant TTL high level；
When high power CW optical fiber laser exports continuous laser, quasi-continuous lasing modulation Transistor-Transistor Logic level circuit and modulation TTL
Level circuit turns the circuit of constant Transistor-Transistor Logic level circuit composition, is converted into constant TTL low levels, and TTL electricity is turned by continuous laser
Ordinary telegram road and the circuit of shaping comparison circuit composition, are converted into constant TTL high level, constant TTL low levels and constant
TTL high level passes through continuous light and quasi-continuous photosignal combiner circuit, exports constant TTL high level；
After high power CW optical fiber laser light path is damaged, quasi-continuous lasing modulation Transistor-Transistor Logic level circuit and modulation Transistor-Transistor Logic level
The circuit and continuous laser that circuit turns constant Transistor-Transistor Logic level circuit composition turn Transistor-Transistor Logic level circuit and shaping comparison circuit composition
Circuit, exports constant TTL low levels, and constant TTL low levels pass through continuous light and quasi-continuous photosignal combiner circuit,
The constant TTL low levels of output；
When the I/O of single-chip microcomputer detects constant TTL low levels, the light extraction for closing high power CW optical fiber laser is enabled.
2. high power CW optical fiber laser light alignment detection circuit as claimed in claim 1, it is characterised in that：It is described to touch again
Bill steady state trigger uses 74LVC1G123 chips.
3. high power CW optical fiber laser light alignment detection circuit as claimed in claim 1, it is characterised in that：It is described to touch again
The RC time constants of bill steady state trigger are more than the cycle of the modulation Transistor-Transistor Logic level after quasi-continuous lasing is changed.
4. high power CW optical fiber laser light alignment detection circuit as claimed in claim 1, it is characterised in that：The comparator
Using TLV3501AIDB chips.
5. high power CW optical fiber laser light alignment detection circuit as claimed in claim 1, it is characterised in that：The OR gate is adopted
Use 74LVC1G32GV chips.
6. high power CW optical fiber laser light alignment detection circuit as claimed in claim 1, it is characterised in that：
First adjustable resistance, is configurable for adjusting the threshold value of quasi-continuous lasing modulation Transistor-Transistor Logic level circuit；
Second adjustable resistance, is configurable for adjusting the threshold value that continuous laser turns continuous T TL level circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710483438.3A CN107290134B (en) | 2017-06-23 | 2017-06-23 | High-power continuous fiber laser light path detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710483438.3A CN107290134B (en) | 2017-06-23 | 2017-06-23 | High-power continuous fiber laser light path detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107290134A true CN107290134A (en) | 2017-10-24 |
| CN107290134B CN107290134B (en) | 2023-05-30 |
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|---|---|---|---|
| CN201710483438.3A Active CN107290134B (en) | 2017-06-23 | 2017-06-23 | High-power continuous fiber laser light path detection circuit |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05335923A (en) * | 1992-05-28 | 1993-12-17 | Sanyo Electric Co Ltd | Photodetector |
| CN201039190Y (en) * | 2007-04-25 | 2008-03-19 | 京信通信系统（中国）有限公司 | Optical fiber transmission repeater and its highly dynamic optical receiving and transmission module |
| CN101762236A (en) * | 2010-01-22 | 2010-06-30 | 长安大学 | Laser light curtain vehicle height detector |
-
2017
- 2017-06-23 CN CN201710483438.3A patent/CN107290134B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05335923A (en) * | 1992-05-28 | 1993-12-17 | Sanyo Electric Co Ltd | Photodetector |
| CN201039190Y (en) * | 2007-04-25 | 2008-03-19 | 京信通信系统（中国）有限公司 | Optical fiber transmission repeater and its highly dynamic optical receiving and transmission module |
| CN101762236A (en) * | 2010-01-22 | 2010-06-30 | 长安大学 | Laser light curtain vehicle height detector |
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| Publication number | Publication date |
|---|---|
| CN107290134B (en) | 2023-05-30 |
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