EP0908854A2 - Verfahren und Vorrichtung zum Erfassen von Personen und Gegenständen in einem gegebenen Raum - Google Patents

Verfahren und Vorrichtung zum Erfassen von Personen und Gegenständen in einem gegebenen Raum Download PDF

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Publication number
EP0908854A2
EP0908854A2 EP98420178A EP98420178A EP0908854A2 EP 0908854 A2 EP0908854 A2 EP 0908854A2 EP 98420178 A EP98420178 A EP 98420178A EP 98420178 A EP98420178 A EP 98420178A EP 0908854 A2 EP0908854 A2 EP 0908854A2
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EP
European Patent Office
Prior art keywords
objects
people
plane
measurement
detected
Prior art date
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Withdrawn
Application number
EP98420178A
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English (en)
French (fr)
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EP0908854A3 (de
Inventor
Michel Gallet
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP0908854A2 publication Critical patent/EP0908854A2/de
Publication of EP0908854A3 publication Critical patent/EP0908854A3/de
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit

Definitions

  • the present invention relates to a method and device for detecting people and objects in a given space, for the purpose of localization and / or counting people and objects, whether they are fixed or mobile, as well as, in particular in the case of people, in order to define characteristics of their movements, such as direction, direction, speed and trajectory.
  • a classic technique consists of interception, by people or objects to detect, from one or more fixed light rays, by general infrared rays, emitted horizontally.
  • This technique lacks precision as soon as "targets" (objects or people to be detected) intercept simultaneously the light rays. In addition, it becomes totally inoperative in the case of people or objects fixed or in very slight movement.
  • Another known technique consists in analyzing the brightness levels detected by video cameras or other photosensitive devices oriented towards people or objects to be detected. This process is only effective only for constant or varying levels of illumination weakly. It is unsuitable, in particular, for outdoor detections as well as in spaces partially or fully enclosed, naturally lit.
  • radars are another type of solutions, for which the detection ranges, the powers used and costs are hardly compatible with practical needs proximity detection in public spaces or private, which is particularly interested in present invention.
  • the method according to the invention for the detection of people and objects in a given space basically consists in performing an optical scan resulting from laser-type optical rays emitted at regular intervals from a source above of people or objects to be detected, emissions of successive rays being produced in a so-called plane measurement plane, which extends inside the space considered by forming a zero or relatively small angle with respect to a direction perpendicular to a plane of reference in which are located and / or move the people or objects to be detected, detection being performed by determination and comparison, for each emission, time shifts observed between the emission of optical rays by the source and the reception of the optical rays reflected by the plane of reference or by people or objects located in the space considered.
  • the people or objects to be detected are located and / or are move in a horizontal reference plane or substantially horizontal; optical scanning is performed then in a vertical measurement plane, or forming an angle relatively low (in practice less than 45 °) by compared to the vertical.
  • the method according to the invention is based on the relative positions and movements of the measurement plane and of people or objects to be detected, which leads to two main modes of implementation of this process.
  • the optical scanning is carried out in a fixed measurement plane, substantially perpendicular to the reference plane in which are located and / or move people or objects to be detected.
  • This simple implementation allows in particular, by comparison of the results (shifts between emission and reception of optical rays) observed in the same measurement plane at successive times, from detect and / or count people or objects movable, moving in a predetermined direction and invariable, substantially perpendicular to the plane of measure, for example: people moving in a corridor, road vehicles moving on a lane, objects transported on a conveyor.
  • optical scanning is performed in a variable measurement plane, occupying positions successive angulars different from each other by relation to the reference plane in which are located and / or move the people or objects to be detected, the emission of optical rays being repeated in each position of the measurement plane.
  • This other mode of setting work, more complex since it comprises in a way a succession of scans, is suitable for detecting people or fixed or slow moving objects in a certain reference space.
  • the combination and comparison shifts between the emission and the reception of the rays optics in successively scanned measurement planes allows here to locate people perfectly or even immobile objects in a reference volume, and determine the characteristics (direction, direction, speed, trajectories) possible movements of these people or objects.
  • this mode of implementation of the process makes it possible to detect and analyze the appearance and the evolution of groups of people, for example forming a queue, in a given space, as well as the types of objects or people identified by their size and their shape. It is thus possible to distinguish the adults children, the presence of special objects (luggage or carts) linked to people, or the circulation of vehicles in motion according to various directions in a delimited space such as square or crossroads.
  • this one mainly includes a ray emitting source laser-type optics, performing optical scanning in the measurement plane, the source being placed above the reference plane in which are located and / or is move the people or objects to be detected, and being associated with means for receiving optical rays reflected by the reference plane or by people or objects, means of determining and comparing time lags observed between transmission and reception of optical rays, and means of analysis and of treatment, able to characterize and locate people or objects located in the space considered. Analysis and processing, by these latter means, are performed simultaneously with scanning.
  • the source emitting laser-type optical rays is pivotally mounted so as to vary the angular position of the plane of measurement in a reference space, the means of analysis and processing being provided to compare or combine the results, namely the shifts between transmission and reception of optical rays, in the measurement planes distinct successively swept.
  • This embodiment applies to the location of people or objects fixed or in slight movement in a reference volume.
  • FIG 1 there is shown very schematically in 2 a beam transceiver laser type optics, arranged above a plane of reference R, here a horizontal plane, on which lie and / or move people 3 and / or objects 4 to detect.
  • Transceiver 2 performs a scan optic in a measurement plane P, which coincides with the plan of Figure 1, emitting optical rays 5 in direction of the reference plane R.
  • the rays 5 are reflected, as the case may be, by the reference plane R or by 3 people or 4 objects to detect, and the rays reflected by the transceiver 2.
  • the latter is associated with means 6 for determining and comparison of the time lags observed between the emission of rays 5 and the reception of rays corresponding reflections, and to means 7 of analysis and treatment.
  • this time difference makes it possible to determine, in the measurement plane P considered, a "profile "8 characterizing people 3 and 4 objects detected, in particular by a certain height h or H measured, allowing then to perform a discrimination, by eliminating non-significant objects in relation to the objectives of the detection (for example isolated objects in the case of detection of persons) and especially when comparing with types predetermined.
  • a fixed 2 transceiver transmitting its optical rays 5 in a measurement plane P also fixed, here a vertical plane perpendicular to the direction general movement F of objects 4 to be detected and count, which here are moving moving objects along a predetermined direction in the plane of reference R.
  • Figures 4 and 5 illustrate another application, in which the device is used for detection of 3 people inside a volume V given, such as a waiting room whose floor constitutes here the reference plane R, people 3 can be stationary or moving in directions any horizontal.
  • the transceiver 2 is installed here by example on the ceiling of the room considered, and it went up oscillating around a horizontal axis 9, in such a way that the measurement plane P is no longer fixed but occupies variable angular positions, not moving too far strongly from the vertical. This variable measurement plan P thus "scans" the reference volume V.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
EP98420178A 1997-10-13 1998-10-08 Verfahren und Vorrichtung zum Erfassen von Personen und Gegenständen in einem gegebenen Raum Withdrawn EP0908854A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9712999A FR2769716B3 (fr) 1997-10-13 1997-10-13 Procede et dispositif pour la detection de personnes et d'objets dans un espace donne
FR9712999 1997-10-13

Publications (2)

Publication Number Publication Date
EP0908854A2 true EP0908854A2 (de) 1999-04-14
EP0908854A3 EP0908854A3 (de) 1999-12-15

Family

ID=9512338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98420178A Withdrawn EP0908854A3 (de) 1997-10-13 1998-10-08 Verfahren und Vorrichtung zum Erfassen von Personen und Gegenständen in einem gegebenen Raum

Country Status (2)

Country Link
EP (1) EP0908854A3 (de)
FR (1) FR2769716B3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012042043A1 (de) * 2010-10-01 2012-04-05 Fastcom Technology Sa System und verfahren zur individualisierung von personen
WO2014179839A1 (en) * 2013-05-07 2014-11-13 Raedyne Systems Pty. Ltd. People and object counter method and system
US10852435B2 (en) 2016-01-20 2020-12-01 Koninklijke Philips N.V. Occupancy sensing system and sensing method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3030056B1 (fr) * 2014-12-16 2019-10-11 Naga Concept Procede de detection d'elements mobiles dans un batiment et installation pour la mise en œuvre de ce procede.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2567275B1 (fr) * 1984-07-09 1986-07-25 Giravions Dorand Procede et dispositif de reperage spatial d'un objet et application en simulation de tir
DE4001219C1 (de) * 1990-01-17 1991-04-25 Gallenschuetz Metallbau Gmbh, 7580 Buehl, De
DE4040811A1 (de) * 1990-12-14 1992-07-09 Iris Gmbh Infrared & Intellige Richtungsselektive zaehl- und schaltvorrichtung
US5305390A (en) * 1991-01-11 1994-04-19 Datatec Industries Inc. Person and object recognition system
JP2963236B2 (ja) * 1991-05-02 1999-10-18 エヌシーアール インターナショナル インコーポレイテッド 通過人数の計数方法
US5515156A (en) * 1993-07-29 1996-05-07 Omron Corporation Electromagentic wave generating device and a distance measuring device
DE4411448C5 (de) * 1994-03-31 2009-05-14 Sick Ag Verfahren und Vorrichtung zur Kontrolle eines vorgegebenen Überwachungsbereichs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012042043A1 (de) * 2010-10-01 2012-04-05 Fastcom Technology Sa System und verfahren zur individualisierung von personen
WO2014179839A1 (en) * 2013-05-07 2014-11-13 Raedyne Systems Pty. Ltd. People and object counter method and system
US10852435B2 (en) 2016-01-20 2020-12-01 Koninklijke Philips N.V. Occupancy sensing system and sensing method

Also Published As

Publication number Publication date
FR2769716B3 (fr) 1999-11-12
EP0908854A3 (de) 1999-12-15
FR2769716A1 (fr) 1999-04-16

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