CN206696429U - Integrated fiber formula pseudo noise code amplitude modulation error means for correcting - Google Patents
Integrated fiber formula pseudo noise code amplitude modulation error means for correcting Download PDFInfo
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- CN206696429U CN206696429U CN201720514433.8U CN201720514433U CN206696429U CN 206696429 U CN206696429 U CN 206696429U CN 201720514433 U CN201720514433 U CN 201720514433U CN 206696429 U CN206696429 U CN 206696429U
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- noise code
- photon detectors
- amplitude modulation
- shunt
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Abstract
The utility model is integrated fiber formula pseudo noise code amplitude modulation error means for correcting, and its structure includes pseudo-noise code generator, laser, shunt, optical circulator, A single-photon detectors, B single-photon detectors, collimater, time arrival recorder, polarizer, fixed optical attenuator, adjustable optical attenuator；Wherein, the input of pseudo-noise code generator and laser connects, and the output end of laser and the input of shunt connect；The A output ends of shunt are connected by fixed optical attenuator with the input of A single-photon detectors；The B output ends of shunt and the A ports of optical circulator are connected, and the B ports of optical circulator are connected with collimater；The C-terminal mouth of optical circulator is connected by adjustable optical attenuator with the input of B single-photon detectors.Advantage：1）Avoid the asynchronism of pulse；2）Reduce the crosstalk of paths.
Description
Technical field
A kind of depth survey apparatus for correcting is the utility model is related to, more particularly to integrated fiber formula pseudo noise code amplitude is adjusted
Error correction device processed, belong to laser ranging technique field.
Background technology
In recent years, time correlation photon counting-type pseudo-random code spread-spectrum system, being compared to the time correlation fixed cycle swashs
Optical detection and ranging system, the limitation of maximum unam can be overcome, survey in high field and be widely used in laser radar, ranging, close
It is wide in the research of the performance such as the precision of the pscudo-random codc modulation laser radar system of time correlation photon counting and signal to noise ratio
General expansion.
Existing pseudo noise code laser radar depth is obtained system and produced more using transmitting pseudo noise code all the way and another way
The method of synchronous high level is detected, problem appear to is that the time that high level pulse can not often start to send with code is complete
Synchronous, especially when sending high code stream speed, this asynchronism can bring the skew that pattern reconstructs, so as to cause cross-correlation ripple
The broadening of shape, depth exactness decline the problems such as；And some employ additional phaselocked loop to solve the system of synchronous sex chromosome mosaicism, hardware
The complexity of system improves；For problem above, the utility model is all the way reference using transmitting-receiving two-way photon arrival time point
Pattern, another way are reception pattern；In light path, existing pseudo noise code amplitude modulation system is often using transmission light pulse
Meanwhile collection with large aperture telescope is placed around in transmitting terminal, to receive target echo, the light path system on this transmitting-receiving Bu Gong roads
Often have easily affected by noise and be received back to the defects of weave efficiency is relatively low；The utility model is using optical fiber collimator, ring of light row
The structures such as device realize pattern transmitting and receive it is integrated and integrated, optical fiber collimator insertion loss is small, for aggregation laser
Energy simultaneously reduces beam divergence angle to 2mrad or so；Optical circulator makes a distinction the light sent out with next light path is received back to,
Them is not interacted as a result of one section of identical light path, on architecture basics are simplified, reduce paths
Crosstalk, to reduce the interference of echo reception, influence of the noise to system is at utmost reduced, improves photon acceptor efficiency.
Utility model content
The utility model proposes the optical fiber type pseudo noise code amplitude modulation error means for correcting of integration, its purpose purport
Solving existing the drawbacks of being produced using transmitting pseudo noise code all the way and another way during synchronous high level is detected, solving transmitting-receiving
The light path system on Bu Gong roads is easily affected by noise and is received back to the defects of weave efficiency is relatively low, on architecture basics are simplified, reduces light
The crosstalk that road is propagated, to reduce the interference of echo reception.
Technical solution of the present utility model：Integrated fiber formula pseudo noise code amplitude modulation error means for correcting, its
Structure is to include pseudo-noise code generator 1, laser 2, shunt 3, optical circulator 4, A single-photon detectors 5, B single-photon detectings
Survey device 6, collimater 7, time arrival recorder 8, polarizer 10, fixed optical attenuator 11, adjustable optical attenuator 12；Wherein, it is pseudo-
The transmitting terminal of random code generator 1 is connected by signal wire with the input of laser 2, and the output end of laser 2 passes through multimode
Optical fiber is connected with the input of shunt 3；The A output ends of shunt 3 pass through fixed optical attenuator 11 and A single-photon detectors 5
Input connection, the output ends of A single-photon detectors 5 is connected by the A input ports of signal wire and time arrival recorder 8
Form A channel；The B output ends of shunt 3 are connected by multimode fibre with the A ports of optical circulator 4, the B ports of optical circulator 4
It is connected by multimode fibre with collimater 7；There is polarizer 10 between collimater 7 and target；The C-terminal mouth of optical circulator 4 is by can
Optical attenuator 12 is connected with the input of B single-photon detectors 6, and output end and the time of B single-photon detectors 6, which reach, to be recorded
The B input ports of instrument 8 connect to form channel B by signal wire.
The advantages of the utility model：
1）Using two-way single-photon detector, the time reaches the recorder record transmitting-receiving two-way photon time point of arrival, avoids
The depth error that the asynchronism of pulse is brought；
2）Pattern transmitting and integrated and integrated, the light received are realized using structures such as optical fiber collimator, optical circulators
Fine collimater insertion loss is small, for aggregation laser energy and reduces beam divergence angle to 2mrad or so；Optical circulator will be sent
The light gone makes a distinction with next light path is received back to, and them is not interacted as a result of one section of identical light path,
On architecture basics are simplified, reduce the crosstalk of paths, to reduce the interference of echo reception, at utmost reduce noise to being
The influence of system, improve photon acceptor efficiency.
Brief description of the drawings
Accompanying drawing 1 is the utility model embodiment system structure diagram.
1 it is pseudo-noise code generator in accompanying drawing, 2 be laser, 3 be shunt, 4 be optical circulator, 5 is A single-photon detectings
Survey device, 6 be B single-photon detectors, 7 be collimater, 8 be reach the time recorder, 9 be host computer, 10 be polarizer, 11 be solid
Determine optical attenuator, 12 be adjustable optical attenuator.
Embodiment
Accompanying drawing is compareed, integrated fiber formula pseudo noise code amplitude modulation error means for correcting, its structure is to include pseudorandom
Code generator 1, laser 2, shunt 3, optical circulator 4, A single-photon detectors 5, B single-photon detectors 6, collimater 7, when
Between reach recorder 8, polarizer 10, fixed optical attenuator 11, adjustable optical attenuator 12；Wherein, the hair of pseudo-noise code generator 1
Sending end is connected by signal wire with the input of laser 2, and the output end of laser 2 is defeated by multimode fibre and shunt 3
Enter end connection；The A output ends of shunt 3 are connected by fixed optical attenuator 11 with the input of A single-photon detectors 5, A monochromatic lights
The A input ports that the output end of sub- detector 5 reaches recorder 8 by signal wire with the time are connected to form A channel；Shunt 3
B output ends be connected by multimode fibre with the A ports of optical circulator 4, the B ports of optical circulator 4 pass through multimode fibre with it is accurate
Straight device 7 connects；Polarizer 10 is installed between collimater 7 and target；The C-terminal mouth of optical circulator 4 passes through adjustable optical attenuator 12
It is connected with the input of B single-photon detectors 6, the output end of B single-photon detectors 6 reaches the B inputs of recorder 8 with the time
Mouth connects to form channel B by signal wire.
Described random code generator 1 is company of match SEL based on PLD（FPGA）Pseudo noise code hair
Raw device, its transmittable 2.5Gbps CML differential level signal.
The shunt 3 is 1 point of 2 optical branching device, and the 1 of company is won using Soret:99 optical fiber splitter.
Described laser 2 is vertical surface laser, using ADI companies height code speed（1Gbps-10Gbps）Vertical surface
Laser driver evaluation board.
The optical circulator 4 includes A ports, B ports, C-terminal mouth, and using the optical circulator 4, light pulse inputs from A ports
Exported to B ports, the light pulse of return is inputted to C-terminal mouth from B ports to be exported, and transmitting-receiving light path shares an optic fibre light path.
The signal wire is 5Gbps HW High Way.
The multimode fibre service band is in 850nm.
The integrated fiber formula pseudo noise code amplitude modulation error means for correcting also includes host computer 9, and host computer uses
Usb signal line reaches recorder with the time and connected.
The time reaches recorder 8 using the series of pik Hubble 300；The photon time reaches recorder 8 and led to including A
Road, channel B, the time point of arrival and the another way time point of arrival do not have temporal stringent synchronization requirement all the way.
The optical circulator 4 leads to the 850nm circulators of company using fibre hundred million.
The A single-photon detectors and B single-photon detectors are PerkinElmer companies single-photon detector.
The fixed optical attenuator is 850nm fixed optical attenuators, and adjustable optical attenuator is 850nm adjustable optical attenuators.
During use：The selection of pseudo-noise code generator 1 based on PLD sends pseudo noise code, vertical to drive
Surface laser device launches light pulse signal；Light pulse signal is divided for two-way by 1 point of 2 optical branching device 3, wherein all the way as reference
Signal imports A single-photon detectors 5 through fixed optical attenuator 11, and another way imports optical circulator 4 as transmitting pulse through optical fiber
A ports, the hair for then exporting from the B ports of optical circulator 4 and more being concentrated the energy of light pulse signal by collimater 7
Target is incident upon, the B ports of optical circulator 4 are imported again by collimater 7 through target formation reflection echo, then from optical circulator
4 C-terminal mouth export simultaneously imports B single-photon detectors 6 through adjustable optical attenuator 12；The signal output part of A single-photon detectors 5 with
The signal output part of B single-photon detectors 6 reaches the A input ports of recorder 8 to the time respectively and the time reaches recorder 8
B input port output signals.
Using two-way single-photon detector, the time reaches the recorder record transmitting-receiving two-way photon time point of arrival, avoids
The depth error that the asynchronism of pulse is brought；Pattern transmitting is realized using structures such as optical fiber collimator, optical circulators and received
It is integrated and integrated；Optical fiber collimator insertion loss is small, for reducing beam divergence angle, aggregation laser energy, ring of light row
Device 4 by the light sent out and be received back to come light path make a distinction, make they will not as a result of one section of identical light path and
Interact, on architecture basics are simplified, reduce the crosstalk of paths, to reduce the interference of echo reception.
Claims (6)
1. integrated fiber formula pseudo noise code amplitude modulation error means for correcting, it is characterized in that including pseudo-noise code generator, swashing
Light device, shunt, optical circulator, A single-photon detectors, B single-photon detectors, collimater, time reach recorder, polarization
Piece, fixed optical attenuator, adjustable optical attenuator；Wherein, the transmitting terminal of pseudo-noise code generator passes through signal wire and laser
Input is connected, and the output end of laser is connected by the input of multimode fibre and shunt；The A output ends of shunt pass through
Fixed optical attenuator is connected with the input of A single-photon detectors, and the output end of A single-photon detectors passes through signal wire and time
The A input ports for reaching recorder connect to form A channel；The A ends that the B output ends of shunt pass through multimode fibre and optical circulator
Mouth connection, the B ports of optical circulator are connected by multimode fibre with collimater；There is polarizer between collimater and target；The ring of light
The C-terminal mouth of shape device is connected by adjustable optical attenuator with the input of B single-photon detectors, the output end of B single-photon detectors
The B input ports that recorder is reached with the time are connected to form channel B by signal wire.
2. integrated fiber formula pseudo noise code amplitude modulation error means for correcting according to claim 1, it is characterized in that institute
The random code generator 1 stated is the pseudo-noise code generator based on PLD.
3. integrated fiber formula pseudo noise code amplitude modulation error means for correcting according to claim 1, it is characterized in that institute
It is 1 point of 2 optical branching device to state shunt.
4. integrated fiber formula pseudo noise code amplitude modulation error means for correcting according to claim 1, it is characterized in that institute
The laser stated is vertical surface laser.
5. integrated fiber formula pseudo noise code amplitude modulation error means for correcting according to claim 1, it is characterized in that institute
State the HW High Way that signal wire is 5Gbps.
6. integrated fiber formula pseudo noise code amplitude modulation error means for correcting according to claim 1, it is characterized in that institute
Multimode fibre wave band is stated in 850nm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720514433.8U CN206696429U (en) | 2017-05-10 | 2017-05-10 | Integrated fiber formula pseudo noise code amplitude modulation error means for correcting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720514433.8U CN206696429U (en) | 2017-05-10 | 2017-05-10 | Integrated fiber formula pseudo noise code amplitude modulation error means for correcting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015233A (en) * | 2017-05-10 | 2017-08-04 | 南京理工大学紫金学院 | Integrated fiber formula pseudo noise code amplitude modulation(PAM) offset correction device |
| CN110346756A (en) * | 2019-07-10 | 2019-10-18 | 四川中电昆辰科技有限公司 | A kind of signal envelope detection device and method and its arrival time modification method |
| CN112539713A (en) * | 2019-09-23 | 2021-03-23 | 南京理工大学 | Device and method for detecting straightness of small-caliber body pipe |
-
2017
- 2017-05-10 CN CN201720514433.8U patent/CN206696429U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015233A (en) * | 2017-05-10 | 2017-08-04 | 南京理工大学紫金学院 | Integrated fiber formula pseudo noise code amplitude modulation(PAM) offset correction device |
| CN107015233B (en) * | 2017-05-10 | 2023-12-29 | 南京理工大学紫金学院 | Integrated optical fiber type pseudo-random code amplitude modulation offset correction device |
| CN110346756A (en) * | 2019-07-10 | 2019-10-18 | 四川中电昆辰科技有限公司 | A kind of signal envelope detection device and method and its arrival time modification method |
| CN110346756B (en) * | 2019-07-10 | 2023-06-06 | 四川中电昆辰科技有限公司 | Signal envelope detection device and method and arrival time correction method thereof |
| CN112539713A (en) * | 2019-09-23 | 2021-03-23 | 南京理工大学 | Device and method for detecting straightness of small-caliber body pipe |
| CN112539713B (en) * | 2019-09-23 | 2022-06-24 | 南京理工大学 | Device and method for detecting straightness of small-caliber body pipe |
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