CN112327324A - System and method for measuring rotation speed and acceleration by double-quantum-number OAM light beam - Google Patents

System and method for measuring rotation speed and acceleration by double-quantum-number OAM light beam Download PDF

Info

Publication number
CN112327324A
CN112327324A CN202011233322.2A CN202011233322A CN112327324A CN 112327324 A CN112327324 A CN 112327324A CN 202011233322 A CN202011233322 A CN 202011233322A CN 112327324 A CN112327324 A CN 112327324A
Authority
CN
China
Prior art keywords
acceleration
quantum
rotation speed
double
series
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202011233322.2A
Other languages
Chinese (zh)
Other versions
CN112327324B (en
Inventor
张子静
岑龙柱
闫茵茵
赵家乐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbin Institute of Technology
Original Assignee
Harbin Institute of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harbin Institute of Technology filed Critical Harbin Institute of Technology
Priority to CN202011233322.2A priority Critical patent/CN112327324B/en
Publication of CN112327324A publication Critical patent/CN112327324A/en
Application granted granted Critical
Publication of CN112327324B publication Critical patent/CN112327324B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/50—Systems of measurement based on relative movement of target
    • G01S17/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

A system and a method for measuring rotation speed and acceleration by double-quantum-number OAM light beams relate to the field of laser radar detection. The invention aims to solve the problems that only constant rotating speed can be measured and the rotating speed and the rotating acceleration cannot be measured simultaneously in the prior art. Laser signals emitted by a laser are sequentially subjected to single-mode optical fiber adjustment, a double-quantum-number orbital angular momentum modulation module and optical system collimation emission and finally emitted to a rotating target to be detected, the rotating target to be detected reflects light carrying transverse rotation speed and acceleration information back to the optical system, the optical system converges the light carrying the transverse rotation speed and the acceleration information to an optical splitter, a series of periodic signals are finally output sequentially through the optical splitter, an optical filter and a detector, a time-frequency analysis signal processor performs time-frequency processing on the series of periodic signals to obtain a series of intermediate frequency, and the transverse rotation speed and the acceleration of the rotating target to be detected are obtained according to the series of intermediate frequency. It is used to measure velocity and acceleration simultaneously.

Description

System and method for measuring rotation speed and acceleration by double-quantum-number OAM light beam
Technical Field
The invention relates to a method for simultaneously measuring the lateral rotation speed and the acceleration based on dual-quantum-number orbital angular momentum modulation. Belongs to the technical field of laser radar detection.
Background
Most of the current researches on the measurement of the rotating speed only can measure the constant rotating speed by using the transverse Doppler effect of the orbital angular momentum OAM of photons. The requirement for simultaneous measurement of the rotational speed and the rotational acceleration cannot be satisfied.
Disclosure of Invention
The invention aims to solve the problems that only constant rotating speed can be measured and the rotating speed and the rotating acceleration cannot be measured simultaneously in the prior art. A system and method for measuring rotation speed and acceleration by using double quantum number OAM light beams are provided.
The system for measuring the rotation speed and the acceleration of the double-quantum-number OAM light beam comprises a laser 1, a single mode fiber 2, a double-quantum-number orbital angular momentum modulation module 3, a light splitter 4, an optical system 5, a light filter 7, a detector 8, a time-frequency analysis signal processor 9 and a display module 10,
laser signals emitted by a laser 1 are adjusted by a single-mode optical fiber 2 and then irradiate onto a double-quantum-number orbital angular momentum modulation module 3, the adjusted laser signals are modulated by the double-quantum-number orbital angular momentum modulation module 3, the modulated double-quantum-number orbital angular momentum optical signals are output and incident to an optical system 5, the modulated double-quantum-number orbital angular momentum optical signals are collimated and emitted to a rotating target 6 to be detected by the optical system 5, the rotating target 6 to be detected reflects light carrying transverse rotation speed and acceleration information back to the optical system 5, the optical system 5 converges the light carrying the transverse rotation speed and acceleration information to an optical splitter 4, the light output by the optical splitter 4 is incident to an optical filter 7, the light after background noise is filtered by the optical filter 7 is incident to a detector 8, and a series of periodic signals are output by the detector 8,
the time-frequency analysis signal processor 9 is used for performing time-frequency processing of sliding window Fourier transform on a series of periodic signals to obtain a series of intermediate frequency,
the display module 10 is configured to obtain a lateral rotation speed and an acceleration of the rotating object to be measured according to a series of intermediate frequency.
Preferably, the laser 1 is a single transverse mode continuous laser.
A method of dual quantum number OAM optical beam measurement of rotation speed and acceleration, the method comprising the steps of:
in the step 1, the method comprises the following steps of, laser signals emitted by a laser 1 are adjusted by a single-mode optical fiber 2 and then irradiate onto a double-quantum-number orbital angular momentum modulation module 3, the adjusted laser signals are modulated by the double-quantum-number orbital angular momentum modulation module 3, the modulated double-quantum-number orbital angular momentum optical signals are output and then are incident to an optical system 5, the modulated double-quantum-number orbital angular momentum optical signals are collimated and transmitted to a rotating target 6 to be detected by the optical system 5, the rotating target 6 to be detected reflects light carrying transverse rotation speed and acceleration information back to the optical system 5, the optical system 5 converges the light carrying the transverse rotation speed and acceleration information to an optical splitter 4, the light output by the optical splitter 4 is incident to an optical filter 7, the light after background noise is filtered by the optical filter 7 is incident to a detector 8, and a series of periodic signals are output by the detector 8;
step 2, processing a series of periodic signals by adopting the time length T and a series of equal time intervals to obtain a plurality of intermediate frequency;
and 3, obtaining the transverse rotation speed and the acceleration of the rotating target to be detected according to the intermediate frequency, the rotation speed and the acceleration relational expression and the plurality of intermediate frequencies.
Preferably, in step 2, a plurality of intermediate frequencies are obtained, and the specific process is as follows:
step 21, measuring a signal with a time length T from the starting point of a series of periodic signals by using the time length T as a time window, and performing Fourier transform on the signal to obtain an intermediate frequency IF1；
Step 22, sliding the time window in step 21 backward for a time interval Δ T on a series of periodic signals, measuring a series of periodic signals according to the time length T, and performing Fourier transform on the signals obtained at the time length T to obtain a second intermediate frequency IF2；
Step 23, repeating the operation of step 22 untilUsing a time window with time length T to complete a series of periodic signals to obtain a series of intermediate frequency { IF } corresponding to the equal time interval { Δ T,2 Δ T }. i Δ T. cndot. }1,IF2,···IFiH, i is a positive integer.
Preferably, in step 3, the relationship between the intermediate frequency and the rotation speed and acceleration is:
Figure BDA0002765922520000021
wherein IF represents an intermediate frequency, IF ═ IF1,IF2,···IFiW is the transverse rotation speed of the rotating object to be measured, w0When t is equal to 0, alpha is the transverse rotation acceleration of the rotating target to be measured, t is time, and delta l is the difference value of the orbital angular momentum of double quanta + l order minus l order.
The invention has the beneficial effects that:
according to the method, on the basis of measuring the transverse rotating speed of the target by utilizing the orbital angular momentum light beam, the time-frequency analysis method is combined, and the rotating speed and the rotating acceleration are measured simultaneously under the condition that the complexity of the system is not increased. The method and the device can realize the measurement precision of 0.7% relative rotation speed and the measurement precision of 1% relative rotation acceleration. This is of great significance for complex rotating object measurements.
Based on the specific transverse rotation Doppler effect of the orbital angular momentum light beam, the measurement of the target transverse rotation speed is realized, the functional limitation that the traditional radial Doppler can only respond to the radial speed is broken through, and the function of laser Doppler speed measurement is greatly enriched.
Drawings
Fig. 1 is a schematic diagram of a system for measuring rotation speed and acceleration by using a double-quantum-number OAM light beam;
FIG. 2 is a series of periodic signal graphs;
FIG. 3 is a diagram of the intensity distribution of the modulated dual-quantum orbital angular momentum signal;
FIG. 4 is a diagram of a dual-quantum-number orbital angular momentum modulation phase;
FIG. 5 is a diagram of dual-quantum-number orbital angular momentum modulation intensity;
FIG. 6 shows the measurement results and relative errors for different rotational speeds;
fig. 7 shows the measurement results and the relative error for different rotational accelerations.
Detailed Description
The first embodiment is as follows: referring to fig. 1, the system for measuring rotation speed and acceleration by using double-quantum-number OAM light beams according to this embodiment includes a laser 1, a single mode fiber 2, a double-quantum-number orbital angular momentum modulation module 3, a beam splitter 4, an optical system 5, a filter 7, a detector 8, a time-frequency analysis signal processor 9 and a display module 10,
laser signals emitted by a laser 1 are adjusted by a single-mode optical fiber 2 and then irradiate onto a double-quantum-number orbital angular momentum modulation module 3, the adjusted laser signals are modulated by the double-quantum-number orbital angular momentum modulation module 3, the modulated double-quantum-number orbital angular momentum optical signals are output and incident to an optical system 5, the modulated double-quantum-number orbital angular momentum optical signals are collimated and emitted to a rotating target 6 to be detected by the optical system 5, the rotating target 6 to be detected reflects light carrying transverse rotation speed and acceleration information back to the optical system 5, the optical system 5 converges the light carrying the transverse rotation speed and acceleration information to an optical splitter 4, the light output by the optical splitter 4 is incident to an optical filter 7, the light after background noise is filtered by the optical filter 7 is incident to a detector 8, and a series of periodic signals are output by the detector 8,
the time-frequency analysis signal processor 9 is used for performing time-frequency processing of sliding window Fourier transform on a series of periodic signals to obtain a series of intermediate frequency,
the display module 10 is configured to obtain a lateral rotation speed and an acceleration of the rotating object to be measured according to a series of intermediate frequency.
In this embodiment, a combination of dual-quantum orbital angular momentum modulation and a time-frequency analysis signal processing method based on a sliding window is adopted, the intermediate frequency of the dual-quantum orbital angular momentum signal is used to obtain the rotation speed, and the sliding window is used to process the echo signal to obtain the time-frequency analysis result of the intermediate frequency signal, so as to obtain the acceleration of the target. Thereby achieving simultaneous acquisition of the target lateral rotational speed and acceleration. The time-frequency analysis signal processor 9 not only measures the intermediate frequency but also measures and analyzes the change of the intermediate frequency along with the time, thereby realizing the simultaneous measurement of the rotating speed and the rotating acceleration.
As shown in fig. 1, the single transverse mode continuous laser is turned on to emit a laser signal, which is further conditioned by passing through a single mode optical fiber. The laser signal modulated by the single-mode fiber can obtain a better mode so as to ensure the modulation efficiency of the orbital angular momentum signal. The adjusted laser signal is irradiated on a spatial light modulator to modulate the dual-quantum-number orbital angular momentum signal, a dual-quantum-number orbital angular momentum phase diagram loaded on the spatial light modulator is shown in fig. 4, and the intensity distribution of the modulated dual-quantum-number orbital angular momentum signal is shown in fig. 5, wherein the application takes a +/-10 order as an example. The modulated double-quantum orbital angular momentum signal is emitted out through collimation of the optical system and irradiates a rotating target to be measured. After reflection of the target, the information carrying the transverse rotation speed omega and the acceleration alpha of the target is returned to a receiving system, and is called echo signals for short.
The echo signals are converged and received by an optical system, firstly enter a receiving system through a light splitter, then are filtered by a narrow-band filter to remove background noise, and finally are detected by a detector. The echo signal detection result is a series of periodic signals as shown in fig. 2. Performing time-frequency analysis processing based on a sliding window to obtain a series of Intermediate Frequency (IF) corresponding to the time points (delta t,2 delta t, i delta t, t)1,IF2,···IFiCndot. cndot.. According to the statistical data shown in FIG. 3, and according to the relation between the intermediate frequency and the rotation speed
Figure BDA0002765922520000041
The data is fitted so that simultaneous measurements of the lateral rotational speed ω and acceleration α of the target can be obtained.
The signal of two components can be transmitted by adopting dual-quantum-number orbital angular momentum modulation, so that the interference of echo and local oscillation signals is avoided, and the echo signal can be directly detected. In addition, the two component signals are transmitted through the same path, so that the problem of matching of local oscillator interference is avoided.
The double-quantum-number orbital angular momentum modulation module 3 is provided with a spatial light modulator, and mainly adopts the spatial light modulator to perform double-quantum-number orbital angular momentum modulation by using a double-quantum-number phase interference pattern as shown in fig. 4 and 5.
The filter 7 is a narrow band filter.
The second embodiment is as follows: in this embodiment, the system for measuring the rotation speed and the acceleration with the double quantum number OAM beam described in the first embodiment will be further explained, and in this embodiment, the laser 1 is a single transverse mode continuous laser.
The third concrete implementation mode: specifically, referring to fig. 2, the method for measuring the rotation speed and the acceleration by using the double-quantum-number OAM beam according to this embodiment includes the following steps:
step 1, laser signals emitted by a laser 1 are adjusted by a single mode fiber 2 and then irradiate onto a double-quantum-number orbital angular momentum modulation module 3, the adjusted laser signals are modulated by the double-quantum-number orbital angular momentum modulation module 3, the modulated double-quantum-number orbital angular momentum optical signals are output and then are incident to an optical system 5, the optical system 5 collimates and transmits the modulated double-quantum-number orbital angular momentum optical signals to a rotating target 6 to be detected, the rotating target 6 to be detected reflects light carrying transverse rotation speed and acceleration information back to the optical system 5, the optical system 5 converges the light carrying transverse rotation speed and acceleration information to an optical splitter 4, the light output by the optical splitter 4 is incident to an optical filter 7, the optical filter 7 irradiates the light after background noise is filtered to a detector 8, and a series of periodic signals are output by the detector 8,
step 2, processing a series of periodic signals by adopting the time length T and a series of equal time intervals to obtain a plurality of intermediate frequency;
and 3, obtaining the transverse rotation speed and the acceleration of the rotating target to be detected according to the intermediate frequency, the rotation speed and the acceleration relational expression and the plurality of intermediate frequencies.
In the present embodiment, the dual-quantum-number orbital angular momentum signal refers to the light velocity after the ± l-order dual-quantum-number orbital angular momentum is superimposed.
As shown in fig. 2, the time length T is used as a time window for fourier transform, then the time is shifted back by Δ T time each time, then the time window T is used for fourier transform, and so on, the time-frequency analysis method based on the sliding window of the patent is performed.
The fourth concrete implementation mode: in this embodiment, the method for measuring the rotation speed and the acceleration by using the dual-quantum-number OAM beam according to the third embodiment is further described, in this embodiment, in step 2, a plurality of intermediate frequency are obtained, and the specific process is as follows:
step 21, measuring a signal with a time length T from the beginning of a series of periodic signals by using the time length T as a time window, and performing Fourier transform on the signal to obtain an intermediate frequency IF1；
Step 22, sliding the time window in step 21 backwards by a time interval Δ T on the series of periodic signals, measuring the signal with the time length of T by using the position of the time window on the series of periodic signals, and performing Fourier transform on the measured signal to obtain a second intermediate frequency IF2；
Step 23, repeating the operation of step 22 until a series of periodic signals are completed with a time window of time length T, to obtain a series of intermediate frequencies { IF } corresponding to equal time intervals { Δ T,2 Δ T,. i Δ T. cndot. }1,IF2,···IFiH, i is a positive integer.
In this embodiment, fig. 6 shows the measurement result and the relative error under different rotation speeds; fig. 7 shows the measurement results and the relative error for different rotational accelerations. As can be seen from fig. 6 and 7, the present invention has high measurement accuracy.
The fifth concrete implementation mode: specifically, this embodiment will be described with reference to fig. 3, and further describes a method for measuring the rotation speed and the acceleration by using a dual-quantum OAM beam as described in the third embodiment, in this embodiment, in step 3, the relation between the intermediate frequency and the rotation speed and the acceleration is as follows:
Figure BDA0002765922520000061
wherein IF represents an intermediate frequency, IF ═ IF1,IF2,···IFiW is the transverse rotation speed of the rotating object to be measured, w0When t is equal to 0, alpha is the transverse rotation acceleration of the rotating target to be measured, t is time, and delta l is the difference value of the orbital angular momentum of double quanta + l order minus l order.

Claims (5)

1. The system for measuring the rotation speed and the acceleration of the double-quantum-number OAM light beam is characterized by comprising a laser (1), a single mode fiber (2), a double-quantum-number orbital angular momentum modulation module (3), a light splitter (4), an optical system (5), a light filter (7), a detector (8), a time-frequency analysis signal processor (9) and a display module (10),
laser signals emitted by a laser (1) are adjusted by a single-mode optical fiber (2) and then irradiate onto a double-quantum-number orbital angular momentum modulation module (3), the adjusted laser signals are modulated by the double-quantum-number orbital angular momentum modulation module (3), modulated double-quantum-number orbital angular momentum optical signals are output and then are incident to an optical system (5), the optical system (5) collimates and transmits the modulated double-quantum-number orbital angular momentum optical signals to a rotating target (6) to be measured, the rotating target (6) to be measured reflects light carrying transverse rotation speed and acceleration information back to the optical system (5), the optical system (5) converges light carrying transverse rotation speed and acceleration information to a light splitter (4), the light output by the light splitter (4) is incident to an optical filter (7), and the optical filter (7) emits light carrying background noise filtered to a detector (8), a series of periodic signals are output through a detector (8),
the time-frequency analysis signal processor (9) is used for carrying out time-frequency processing of sliding window Fourier transform on a series of periodic signals to obtain a series of intermediate frequency,
the display module (10) is used for obtaining the transverse rotation speed and the acceleration of the rotating target to be measured according to a series of intermediate frequency.
2. The dual quantum OAM beam rotational speed and acceleration measurement system as claimed in claim 1, wherein the laser (1) is a single transverse mode continuous laser.
3. A method for measuring rotation speed and acceleration by double-quantum-number OAM light beams is characterized by comprising the following steps:
step 1, laser signals emitted by a laser (1) are adjusted by a single mode fiber (2) and then irradiate onto a double-quantum-number orbital angular momentum modulation module (3), the adjusted laser signals are modulated by the double-quantum-number orbital angular momentum modulation module (3), modulated double-quantum-number orbital angular momentum optical signals are output and then are incident to an optical system (5), the optical system (5) collimates and transmits the modulated double-quantum-number orbital angular momentum optical signals to a to-be-detected rotating target (6), the to-be-detected rotating target (6) reflects light carrying transverse rotation speed and acceleration information back to the optical system (5), the optical system (5) converges light carrying transverse rotation speed and acceleration information to a beam splitter (4), the light output by the beam splitter (4) is incident to an optical filter (7), and the optical filter (7) emits the light carrying background noise to a detector (8), outputting a series of periodic signals via a detector (8);
step 2, processing a series of periodic signals by adopting the time length T and a series of equal time intervals to obtain a plurality of intermediate frequency;
and 3, obtaining the transverse rotation speed and the acceleration of the rotating target to be detected according to the intermediate frequency, the rotation speed and the acceleration relational expression and the plurality of intermediate frequencies.
4. The method for measuring the rotation speed and the acceleration of the double-quantum-number OAM light beam according to claim 3, wherein in the step 2, a plurality of intermediate frequency is obtained, and the specific process is as follows:
step 21, measuring a signal with a time length T from the starting point of a series of periodic signals by using the time length T as a time window, and carrying out Fourier transform on the signal to obtain a first signalIntermediate frequency IF1；
Step 22, sliding the time window in step 21 backward for a time interval Δ T on a series of periodic signals, measuring a series of periodic signals according to the time length T, and performing Fourier transform on the signals obtained at the time length T to obtain a second intermediate frequency IF2；
Step 23, repeating the operation of step 22 until a series of periodic signals are completed by a time window with a time length of T, obtaining a series of intermediate frequencies { IF } corresponding to the equal time intervals { Δ T,2 Δ T, … i Δ T … }1,IF2,…IFi…, and i is a positive integer.
5. The method for measuring rotation speed and acceleration by using double quantum number OAM optical beam according to claim 3, wherein in step 3, the relationship between the intermediate frequency and the rotation speed and acceleration is as follows:
Figure FDA0002765922510000021
wherein IF represents an intermediate frequency, IF ═ IF1,IF2,…IFi…, w is the transverse rotation speed of the rotating object to be measured, w is0When t is equal to 0, alpha is the transverse rotation acceleration of the rotating target to be measured, t is time, and delta l is the difference value of the orbital angular momentum of double quanta + l order minus l order.
CN202011233322.2A 2020-11-06 2020-11-06 System and method for measuring rotation speed and acceleration by double quantum number OAM light beam Active CN112327324B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011233322.2A CN112327324B (en) 2020-11-06 2020-11-06 System and method for measuring rotation speed and acceleration by double quantum number OAM light beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011233322.2A CN112327324B (en) 2020-11-06 2020-11-06 System and method for measuring rotation speed and acceleration by double quantum number OAM light beam

Publications (2)

Publication Number Publication Date
CN112327324A true CN112327324A (en) 2021-02-05
CN112327324B CN112327324B (en) 2023-09-26

Family

ID=74316737

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011233322.2A Active CN112327324B (en) 2020-11-06 2020-11-06 System and method for measuring rotation speed and acceleration by double quantum number OAM light beam

Country Status (1)

Country Link
CN (1) CN112327324B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103837904A (en) * 2014-03-20 2014-06-04 中国科学院武汉物理与数学研究所 Combination inertial sensor based on multi-component atom interferometer and measurement method of combination inertial sensor
CN105425244A (en) * 2015-12-16 2016-03-23 哈尔滨工业大学 Front mixing chirp modulation photon counting laser radar
CN106289526A (en) * 2016-07-21 2017-01-04 哈尔滨工业大学 Photon trajectory angular momentum based on wave-front conversion method measures system and method
DE102015013298A1 (en) * 2015-10-13 2017-04-13 Thomas Hübner Feldbrückenschlag mechanism for controlling the angular momentum (spin) of the electron
CN108680768A (en) * 2018-06-28 2018-10-19 北京理工大学 A kind of method and apparatus of detection rotary body angular acceleration

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103837904A (en) * 2014-03-20 2014-06-04 中国科学院武汉物理与数学研究所 Combination inertial sensor based on multi-component atom interferometer and measurement method of combination inertial sensor
DE102015013298A1 (en) * 2015-10-13 2017-04-13 Thomas Hübner Feldbrückenschlag mechanism for controlling the angular momentum (spin) of the electron
CN105425244A (en) * 2015-12-16 2016-03-23 哈尔滨工业大学 Front mixing chirp modulation photon counting laser radar
CN106289526A (en) * 2016-07-21 2017-01-04 哈尔滨工业大学 Photon trajectory angular momentum based on wave-front conversion method measures system and method
CN108680768A (en) * 2018-06-28 2018-10-19 北京理工大学 A kind of method and apparatus of detection rotary body angular acceleration

Also Published As

Publication number Publication date
CN112327324B (en) 2023-09-26

Similar Documents

Publication Publication Date Title
US11656075B2 (en) High-sensitivity gas-mapping 3D imager and method of operation
US11579292B2 (en) Method and system for using square wave digital chirp signal for optical chirped range detection
US7307700B1 (en) Ultra-linear signal processing for radar and laser radar
JP6903743B2 (en) How to process signals from coherent riders and related rider systems
US20080239281A1 (en) Absolute distance meter
US20060066836A1 (en) Absolute distance meter that measures a moving retroreflector
JP6935506B2 (en) How to process signals from coherent riders to reduce noise and related rider systems
CN105487067B (en) Bigness scale and accurate measurement distance signal processing method, the processing module and chirped modulation photon counting laser radar system based on the module
CN101788671B (en) Multicycle modulation method applied to laser ranging device using chirp amplitude modulation based on heterodyne detection
US7616294B2 (en) Laser anemometry with improved eye safety
CN112114326A (en) Frequency sweep signal splicing method and device for FMCW distance measurement
CN112505719A (en) Laser wind measuring radar wind measuring method and system with Doppler frequency correction secondary compensation
US20230168381A1 (en) Radar Detection Method and Related Apparatus
CN111122500A (en) Gas concentration remote sensing detection device and method based on coherent detection method
CN111208084A (en) Optical fiber gas concentration remote sensing detection device and method based on coherent detection method
CN112327324B (en) System and method for measuring rotation speed and acceleration by double quantum number OAM light beam
CN112034483B (en) Multi-target distance-speed decoupling method based on coherent detection correlation imaging technology
CN114527293B (en) High-precision rotating speed measuring method based on femtosecond optical frequency comb
JP6653052B2 (en) Laser ranging device and laser ranging method
CN112285730B (en) Multidimensional information detection system based on orbital angular momentum modulation
US11988779B2 (en) Readout architecture for FMCW LiDAR
CN205982626U (en) System of testing speed based on two etalons
JPS5866881A (en) Surveying equipment by light wave
JP2509301B2 (en) Lightwave ranging device
CN110346787B (en) Two-dimensional speed measurement radar system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant