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WO2000002062A2 - Procede de detection et systemes optiques et optoelectroniques - Google Patents

Procede de detection et systemes optiques et optoelectroniques Download PDF

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Publication number
WO2000002062A2
WO2000002062A2 PCT/RU1999/000214 RU9900214W WO0002062A2 WO 2000002062 A2 WO2000002062 A2 WO 2000002062A2 RU 9900214 W RU9900214 W RU 9900214W WO 0002062 A2 WO0002062 A2 WO 0002062A2
Authority
WO
WIPO (PCT)
Prior art keywords
keying
frequency
signals
transduction
videosignals
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.)
Ceased
Application number
PCT/RU1999/000214
Other languages
English (en)
Other versions
WO2000002062A3 (fr
WO2000002062A9 (fr
Inventor
Nikolai Nikolaevich Slipchenko
Sergei Anatolievich Mikhailenko
Alexandr Sergeevich Kazakov
Mikhail Iliich Krymsky
Viktor Alexeevich Podjuev
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP99935195A priority Critical patent/EP1012626A2/fr
Publication of WO2000002062A2 publication Critical patent/WO2000002062A2/fr
Publication of WO2000002062A3 publication Critical patent/WO2000002062A3/fr
Publication of WO2000002062A9 publication Critical patent/WO2000002062A9/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
    • 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
    • G01S17/04—Systems determining the presence of a target
    • 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
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S17/18—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein range gates are used

Definitions

  • the invention relates to the field of optical detection and ranging, strictly to systems of optical search, detection and recognition of a type of the detected object using TV-methods of signals identification and it can be used for creation of burglar alarm systems, operating at the conditions of interferences, with ensuring
  • an emitting device consists of emitter and output optical system. At the place of emitter, the optical quantum generator or another source of light is used.
  • the output optical system can include optics, forming the required directional pattern and scanning device, providing needful field of view. Really, path of signal propagation contains a source of interferences, so their influence affects both direct and return signals, however predominate influence is their influence on the return signal.
  • the angle characteristics of emitter are chosen narrow enough for the most concentration of emitting energy in the ordered direction. Upon that, considerable part of calculation of light fields is definition of light diffusion from space-limited narrow-collimation source. Within usual conditions, object disperses the light signal diffusively, and that leads to re-emission of sounding signal in wide solid angle. Thus, calculating attenuation of light signal upon its movement from an object to optical radar's receiver, the task concerning a field of source, reflecting signal, should be solved.
  • the indicated technical task is analogous to the task settled in the applied invention, as far as the specificity of detected optical and optoelectronical objects is mirror (direct) character of reflection, upon which beam divergence of optical systems for detecting and ranging is equal before / after reflection.
  • the angle divergence of the reflected light flux is 10 4 -10 5 as much, than upon diffusive dispertion, bearing in mind, that real objects, as a rule, are neither lambert diffusive reflectors, nor diffusers of mirror type, but their combination.
  • Another goal is to single out or to stress the features at the initial image, which are necessary for solution of a task of detection and/or recognition of objects.
  • the final solution can be taken either directly by operator with the help of picture monitor or by classifier, as distinguishing features of the investigated object are stored in its memory.
  • a method for detection of optical and optoelectronic means is applied, based on sounding of controlled space volume by scanning pulse laser emission, receipt of optical signals in a spectrum range of the reflected laser emission from the ordered distance and surrounding site of space, determined by observation depth, transduction of received signals of image into videosignals, threshold selection of received video signals set for elimination of disturbing background image, where sounding of the controlled space volume is carried out with pulse repetition frequency of laser emission equal to fi/n, fi - line frequency of the used TV-method of signal transduction, n - natural number, fulfilling the term n ⁇ f / f f , and f f - frame frequency of the used TV-method of signal transduction, upon that emitting subsequence of laser impulses is coded by on-off keying with frequency f f /m, m - natural number, fulfilling the term 2 ⁇ m ⁇ ft/2, reveal from a number of received videosignals, excessed threshold, videosignals,
  • FIGURE 1 shows a preferred embodiment in accordance with the present invention.
  • EOT electrooptical transducer
  • the controlled space volume where presence of object for detection (1) is supposed, radiated by laser (12), i.e. by scanning impulse emission with repetition frequency fj/n and sequent on-off keying with frequency f f /m carried out by modulator (13) and frame frequency divider (14) of TV camera (5).
  • Laser emission (12) reflected from the object (1) and other objects in a controlled space volume, is received by objective (2), which forms image of projection of tested space volume at input photocathode of EOT (3).
  • Image signals, reinforced by EOT (3) are imaged on photosensitive element of TV camera (5) through reproductive objective (4).
  • Videosignals of the TV camera (5) output go to picture monitor (6), videosignal processing unit (7), synchronizer (10) and AGC scheme (16).
  • Synchronizer (10) provides synchronous operation of high voltage impulse sources (9, 11), forming sync pulses, managing modulator (13), frame frequency divider (14), laser (12), pulse bar unit (8) and videosignal processing unit (7).
  • On-off keying used with respect to sequence of emissed impulses with frequency ff/m, occurring to be a frequency with a range -3-5 Hz upon chosen values m, implemented with the help of signals, coming from frame frequency divider (14), enables using criterion of their correlation with emissed impulses upon processing in videosignal processing unit (7) for selection of the received signals reflected from object for detection, and as a result their image will twinkle at the screen of picture monitor (6) with indicated frequency, which being closest to the frequency of human brain ⁇ - rhythms causes fatigue influence, that affecting accordingly an observer-operator, automatically attracts his attention, not let him missing the fact of objective presence of object for detection.
  • This parameter enables to provide selection of reflected signals at the background of outside exposures, for instance, such as car's head lights, illumination lamps in the appartments' windows etc., and videosignal processing unit (7) will produce alarm signal automatically.
  • the scheme of automatic gain control (16), managing diaphragms of objectives (2) & (4) and EOT's reinforcement, provides support of signal at an optimum level at TV camera (5) input upon change of signal's level at a pupil of input objective (2).
  • EOT electro-optical transducers
  • Used correlation method for recognition of signals of concrete type is implemented by saving of the code in videosignal processing unit (7), which determines operation of frame frequency divider (14), for a conformity with which reflected signal is checked up, entered the input of videosignal processing unit (7), exceeded threshold, determined for elimination of background level.
  • the alarm signal automatically operates out and selected information signals, transduced into optical image, getting into picture monitor (6), enable to attract operator's attention, as far as screen, twinkling with a frequency of the code, used for a on-off keying, is a factor, affecting human physiology, that provides reduction of a possibility of the fact of missdetection.

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)
  • Geophysics And Detection Of Objects (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

Cette invention se rapporte au domaine de la détection optique et de la télémétrie, et concerne plus précisément des systèmes permettant de détecter et de reconnaître un type d'objet à l'aide de procédés de télévision d'identification de signaux. Cette invention peut être utilisée dans la fabrication de systèmes d'alarme anti-cambriolage. Cette invention permet de détecter un objet par perturbations de signaux, et de signaliser l'organisation de leur apparence dans un mode. Cette invention permet également de réduire les risques d'une mauvaise détection d'un objet imputable à un facteur humain, tel que la fatigue de l'opérateur. Ce procédé comprend les étapes suivantes: sonder le volume spatial à surveiller en effectuant un balayage à l'aide d'émissions laser par impulsions; recevoir les signaux d'image optique depuis une distance prédéterminée; effectuer une transduction des signaux d'image reçus en un signal vidéo; et effectuer une sélection par seuils de manière à éliminer l'image de fond. Ce procédé se caractérise en ce que le sondage du volume spatial se fait à une fréquence fl/n, et en ce que la sous-séquence d'impulsions émises est codée par une modulation tout ou rien à une fréquence ff/m, étant entendu que fl et ff représentent les fréquences de ligne et de trame en rapport avec le procédé de télévision utilisé pour transduction des signaux, et que n et m sont des nombres naturels définis par les relations n≤fl/ff, 2≤m≤ff/2. Ce procédé consiste ensuite à révéler les signaux vidéo qui sont en corrélation avec un code de modulation tout ou rien de la sous-séquence d'impulsions émises, et à générer automatiquement un signal d'alarme. Après la transduction des signaux vidéo en image optique, le scintillement de la luminosité de l'écran de télévision peut être réglé à l'aide de l'opérateur et à l'aide de la fréquence de modulation tout ou rien.
PCT/RU1999/000214 1998-07-03 1999-06-29 Procede de detection et systemes optiques et optoelectroniques Ceased WO2000002062A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99935195A EP1012626A2 (fr) 1998-07-03 1999-06-29 Procede de detection et systemes optiques et optoelectroniques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU98112379 1998-07-03
RU98112379/09A RU2133485C1 (ru) 1998-07-03 1998-07-03 Способ обнаружения средств оптического и оптоэлектронного типа

Publications (3)

Publication Number Publication Date
WO2000002062A2 true WO2000002062A2 (fr) 2000-01-13
WO2000002062A3 WO2000002062A3 (fr) 2000-04-20
WO2000002062A9 WO2000002062A9 (fr) 2000-07-27

Family

ID=20207814

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU1999/000214 Ceased WO2000002062A2 (fr) 1998-07-03 1999-06-29 Procede de detection et systemes optiques et optoelectroniques

Country Status (3)

Country Link
EP (1) EP1012626A2 (fr)
RU (1) RU2133485C1 (fr)
WO (1) WO2000002062A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003060554A1 (fr) * 2001-12-27 2003-07-24 Nikolai Nikolaevich Slipchenko Indicateur d'objets optiques et opto-electroniques
WO2003060555A1 (fr) * 2001-12-27 2003-07-24 Nikolai Nikolaevich Slipchenko Procede et dispositif de detection d'objets optiques et optoelectroniques
CN108717182A (zh) * 2018-05-02 2018-10-30 深圳市速腾聚创科技有限公司 激光雷达抗干扰的方法及抗干扰激光雷达

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2226318C2 (ru) * 2002-05-28 2004-03-27 Московское конструкторское бюро "Электрон" Способ использования в космосе охлаждаемых преобразователей лучистая энергия/видеосигнал без применения специальных теплоносителей, термоэлектрических или механических устройств охлаждения и устройство, реализующее этот способ
RU2223516C1 (ru) * 2002-07-02 2004-02-10 Закрытое акционерное общество Научно-производственное акционерное общество "ЭПОЛАР" Способ обнаружения глаз людей и животных
RU2239205C2 (ru) * 2002-07-15 2004-10-27 Федеральное государственное унитарное предприятие "Центральное конструкторское бюро точного приборостроения" Российского агентства по обычным вооружениям Устройство для обнаружения оптических и оптико-электронных приборов (варианты)
RU2278399C2 (ru) * 2004-06-16 2006-06-20 Общество с ограниченной ответственностью научно-производственное предприятие "ТАЛОС" Способ обнаружения оптических и оптоэлектронных средств наблюдения и устройство для его осуществления

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899250A (en) * 1974-02-04 1975-08-12 Ball Brothers Res Corp Active-gated television automatic range sweep technique
US4301452A (en) * 1976-04-27 1981-11-17 Anderson Lawrence F Station watch alarm system
US4470048A (en) * 1982-03-29 1984-09-04 Sperry Corporation Range profile target classifier
US4737028A (en) * 1986-04-07 1988-04-12 The United States Of America As Represented By The Secretary Of The Army Target loop active boresighting device
GB2212689B (en) * 1987-11-17 1992-01-02 Ferranti Plc Television camera system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003060554A1 (fr) * 2001-12-27 2003-07-24 Nikolai Nikolaevich Slipchenko Indicateur d'objets optiques et opto-electroniques
WO2003060555A1 (fr) * 2001-12-27 2003-07-24 Nikolai Nikolaevich Slipchenko Procede et dispositif de detection d'objets optiques et optoelectroniques
CN108717182A (zh) * 2018-05-02 2018-10-30 深圳市速腾聚创科技有限公司 激光雷达抗干扰的方法及抗干扰激光雷达
CN108717182B (zh) * 2018-05-02 2023-10-31 深圳市速腾聚创科技有限公司 激光雷达抗干扰的方法及抗干扰激光雷达

Also Published As

Publication number Publication date
RU2133485C1 (ru) 1999-07-20
WO2000002062A3 (fr) 2000-04-20
EP1012626A2 (fr) 2000-06-28
WO2000002062A9 (fr) 2000-07-27

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