WO1999055122A1 - Lampe tridimensionnelle prete a l'emploi - Google Patents

Lampe tridimensionnelle prete a l'emploi Download PDF

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Publication number
WO1999055122A1
WO1999055122A1 PCT/CA1999/000317 CA9900317W WO9955122A1 WO 1999055122 A1 WO1999055122 A1 WO 1999055122A1 CA 9900317 W CA9900317 W CA 9900317W WO 9955122 A1 WO9955122 A1 WO 9955122A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
data
lighting system
computer
dmx
Prior art date
Application number
PCT/CA1999/000317
Other languages
English (en)
Inventor
Will N. Bauer
Original Assignee
Bauer Will N
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 Bauer Will N filed Critical Bauer Will N
Priority to AU34015/99A priority Critical patent/AU3401599A/en
Publication of WO1999055122A1 publication Critical patent/WO1999055122A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/155—Coordinated control of two or more light sources

Definitions

  • This invention relates to the provision of lighting systems equipped and ready to respond to a flow of 3D control information (3D-ready intelligent lamps) .
  • Robotic lamps are used primarily in the entertainment industry such as night clubs, theatres and concert venues. They also have additional application in areas such as promotion/advertising, architectural lighting, and so- called “immersive reality” among others.
  • These robotic or “intelligent” lamps can be remotely controlled by an industry communications standard called "DMX-512". This is a high speed serial data protocol which allows remote computer control of many different features of the lamp fixture (s) such as the pan and tilt angle at which the light beam is projected, beam intensity, colour selection, beam width (iris), focus, and light pattern (“gobo” selection) among others.
  • a 3D-ready lamp is specially equipped and is able to respond in an optimal fashion to streams of 3D control information.
  • An intelligent lamp can respond to 3D information in a variety of ways. For many of the responses, it is necessary to know the 3D position of the lamp and its orientation. Coordinates for the X, Y and Z axes of three dimensional space plus pitch, yaw, and roll angles for the orientation in space give a six degree of freedom (“6DOF") description of the status of the lamp. This information establishes a coordinate system which completely describes the lamp and is necessary to calculate the way in which the lamp responds to incoming 3D information. For example, for a lamp to follow an object moving in three dimensions, one must know the 3D coordinates of the object and the 6D0F coordinates of the lamp in order to correctly calculate the pan/tilt angles necessary to point the lamp at the moving object .
  • 6DOF six degree of freedom
  • Requirement a) can be accomplished in a number of ways but perhaps the easiest is to have a two-axis gravity sensor which can measure the pitch and roll angles of the lamp's orientation relative to the earth's gravity field.
  • sensors are available which do this and which are easily interfaced to an inexpensive microcontroller - 4 - chip.
  • Some are two axis accelerometers which consist of two DC frequency response accelerometers mounted orthogonally to each other. Others are capacitively based and sense the orientation/position of liquid in a tube much like a traditional carpentry level.
  • Requirement b) can be met with a ranging system that can sense the distance between the lamp and the reference point.
  • a ranging system that can sense the distance between the lamp and the reference point.
  • technologies capable of this For example, laser ranging systems which use light beams that are either pulsed or continuously present. When pulsed, the pulse is emitted from a laser transmitter and the time delay between its emission and the sensing of its reflection by receiver circuitry is measured. This can yield accuracies anywhere from one or two metres to centimetres depending on the accuracy of the timing and the number of measurements averaged. When used continuously, a phase measurement is performed comparing the phase of the transmitted wave with the phase of the reflected wave. This method allows greater accuracy but usually fewer measurements per second are possible.
  • Another technology is the use of ultrasonic waves. The time delay between the emission and reception of ultrasonic pulses can be measured and this varies linearly with distance.
  • Requirement c) can be met with an appropriate rotational sensing device such as a gyro, compass or the like. Alternatively, it could be calculated by pointing the light at two points of known (X, Y, Z) position coordinates rather than one.
  • An additional desirable, but not absolutely necessary, characteristic of a 3D-ready lamp is the ability to be superior at responding to streams of 3D positional data.
  • a problem that normal intelligent lamps have is that their control systems are open-loop which is to say that there is no feedback regarding the state of the lamp vis-a-vis the state that it was commanded to assume. Particularly with pan and tilt motor control, this can be problematic since open-loop control greatly restricts the speed and precision at which these motors can operate.
  • this lamp would be capable of detecting its 6DOF position/orientation on being pointed at one reference point.
  • it In its normal “operational mode” it is capable of extremely fast and precise pan/tilt positioning using the pan/tilt encoder closed-loop feedback. Further, it is capable of responding to 3D positioning information sent to it, i.e. instead of responding to just pan and tilt angle positioning commands sent to it by an external controller, it is capable of being sent a 3D (x, y, z) coordinate and, based on its own position/orientation coordinates, calculating the pan/tilt angles necessary to point at this position.
  • This 3D-ready functionality can be implemented either as a standalone package that can be retrofitted to existing lamps or it can be built in as an integral part of a new design of lighting fixture.
  • pan/tilt positioning algorithms such as a Kalman filter which allow the light's pan/tilt positioning to look ahead or "lead" a moving 3D point based on knowledge of its previous recent history of movements. This would allow even better following of moving objects, particularly those being tracked by a 3D tracking system whose coordinates were being fed to the light in real time.
  • the invention provides a lighting system equipped to respond to a flow of three dimensional control information comprising at least one variably responsive intelligent lamp controlled by a computer communication means to provide input data for the lamp characterized in that the system includes feed back means from the lamp to the computer to provide data to the computer in real-time as to the six degrees of freedom of the lamp, the actual pan/tilt coordinates of the lamp and to provide ranging means between the lamp and a surface on which it is projected.
  • the communication means may be a serial data protocol such as a TCP/IP or can use some other serial protocol such as a DMX-512 data source connected in a loop to provide feedback.
  • DMX-512 is not normally a bidirectional protocol; normally one may send data from one source to many destinations but one cannot send from the many destinations to the one source.
  • 3D lights To provide the possibility for 3D lights to provide feedback about their 6DOF coordinates or about the distance between the lamp and the surface onto - 10 - which it was shining, it is necessary to reallocate some of the lamp's channels (for use in calibration mode) and add additional DMX channels for distance data, pan data and tilt data respectively.
  • lamps are set to receive data from a contiguous range of DMX channels, the lowest numbered of which is called the "base channel" .
  • base channel the lowest numbered of which is called the "base channel”
  • a lamp might be set to receive data covering DMX channels 98 to 111 i.e. a base channel of 98.
  • Figures 1A and IB depict the problem of maintaining constant beam width on a moving projection surface
  • FIG. 2 is a block diagram of one embodiment of the invention.
  • Figure 3 is a block diagram of the internal functioning of the 3D light controller of Figure 2.
  • Figure 1A shows a focussed light source 10 projected on a projection surface 11 which is located a distance R from the light source.
  • the image on the projection surface 11 covers an area of diameter D.
  • Figure IB shows the projection surface 11 having moved to a distance 2R from the light source 10.
  • the diameter of the image has correspondingly grown to 2D although it would be desirable for it to remain at the original size.
  • FIG. 2 shows a normal intelligent light 12 connected normally by a unidirectional DMX path 14 to a lighting control console or other DMX source such as a 3D tracking light control system 16 through a 3D light controller module 18.
  • a lighting control console or other DMX source such as a 3D tracking light control system 16
  • 3D light controller module 18 is shown separately from the "normal lamp” 12 it could be built as an integral part of the lamp itself thus forming a sub-system of the lamp.
  • DMX might well not be used to communicate with - 12 - the normal portion of the lamp 12 since connections could be made by more direct means within the light circuitry itself .
  • Figure 2 also shows the DMX signal path 20 for the light controller module 18 whose input is connected to the lighting console 16 and whose output is connected to a series of other DMX controllable lamps 22.
  • DMX data leaves the lighting control console 16 and is sent via DMX to the 3D light controller module 18.
  • the incoming DMX data is echoed to the DMX output of the module 18 with channels reserved for the transmission of internal data germane to the 3D light controller module 18 and the normal intelligent lamp 12 to which it is attached.
  • DMX data entering at this input contains reserved channel information from all 3D light controller modules 18 connected in the DMX chain which can then be received, examined, and acted upon by software of the lighting controller 18.
  • FIG. 3 is a block diagram of the internal working of the 3D light controller module 18.
  • the base DMX address of the module 18 is set via the base address dip switches 24 and is read at power-up of microcontroller/DSP 30 or when the switches are changed during operation.
  • Incoming DMX data is sent both to the DMX I/O controller 26 and to the - 13 - module's light DMX out connector 28 where it is sent to the normal lamp's DMX input.
  • the DMX I/O controller 26 functions as a device which echoes incoming DMX data to the DMX output 28 with minimum latency.
  • the only DMX data not echoed is incoming data sent on the reserved channels (14A) for this module. These data are discarded and replaced by data generated by the module 18 itself. What is actually sent on these channels will vary with functional mode and with the type of operation desired but it will generally be information germane to either the 6DOF coordinates of the lamp its real-time pan/tilt encoder coordinates from the pan/tilt encoders 40, or to the results of calculations involving these coordinates done by the microcontroller/DSP 30.
  • the microcontroller/DSP 30 can be either a relatively inexpensive microcontroller such as the 89C52, a more complex DSP chip such as the TMS320C50, or a PC v 486 chip or chip set depending on the complexity of calculation it is desired to perform. In some situations it may be desirable to have all complex calculations performed externally by the lighting control console 16 and/or 3D tracking light control system (see Figure 2) . In other situations, it may be desirable to have the 3D light controller module 18 perform a variety of complex calculations itself. In any event, the microcontroller/DSP 30 monitors the incoming DMX stream for commands. At the same time, it monitors a laser ranging sub-system 32 via a parallel or serial port connection.
  • the laser ranging subsystem 32 provides information about the distance between - 14 - the lamp and the surface onto which the light is shining. When the laser ranging sub-system 32 is active (something that is controlled by the microcontroller/DSP) this information is updated up to 10 times per second.
  • the microcontroller/DSP is also connected to an analog to digital ( "A/D" ) converter 34 and a two position SPDT electronic switch 36. This switch is connected to a two axis orientation sensor 37 which continuously measures the pitch and roll angles of the 3D light controller module (which is mounted on the normal lamp 12 so that its orientation is the same as that of the normal lamp) . By this arrangement, the microcontroller/DSP can measure these angles during calibration.
  • the microcontroller/DSP 30 is also provided with some RAM and/or ROM memory 38 for storing data plus configuration information such as light patterns etc. and it accesses/uses the RAM/ROM as needed.
  • the module containing the laser ranging subsystem 32 can be scanned through a series of pan/tilt angle settings with the distance from the light to the point upon the stage collinear with a line through said pan/tilt angle setting being measured by the laser ranging subsystem 32.
  • pan/tilt angle of the light plus range of the light to the stage point plus knowledge of the light's X, Y, Z position and yaw, pitch, roll orientation
  • a 3D model of the stage area plus any props, walls, etc. present upon the stage may be generated and stored for use by software such as a virtual light CAD modelling program or other applications as deemed appropriate.
  • software such as a virtual light CAD modelling program or other applications as deemed appropriate.
  • virtual lighting CAD programs currently exist and it is always problematic to match up the virtual world created as a model of the performance space with the performance space as it was actually built.
  • the 3D digitization process would allow for rationalization of the virtual model with the constructed reality.
  • use may be made of the pan/tilt encoders 40 since these allow near instantaneous knowledge of the pan/tilt angles of the light which, in turn, allow the digitization process to proceed at a speed limited by the number of range measurements possible per second.
  • the light would have to moved to one pan/tilt angle setting and stopped there for a "settling period" to be sure that the light was no longer moving and was stably pointed. Only then may the laser ranging subsystem 32 be used to determine the distance to this point, greatly slowing the digitization process.
  • microcontroller/DSP 30 may also monitor the outputs of pan/tilt encoders 40 which provide real-time information about where the lamp is pointing. This information may be used to provide closed-loop control of the lamp's positioning with all of the advantages this entails. - 16 -
  • microcontroller/DSP may also perform predictive calculations such as Kalman filtering of pan/tilt data to allow the light to lead a performer or object in their trajectory rather than lagging behind and following them.

Abstract

L'invention concerne un système d'éclairage tridimensionnel contrôlé par l'intermédiaire d'un protocole de communication, tel que DMX-512 ou TCP/AI. Des données concernant plusieurs lampes (12) des paramètres du système d'éclairage, tels que l'alignement ou l'orientation peuvent être recueillies en temps réel et de manière indépendante, et exploitées pour modifier le contrôle des lampes. A cette fin, certaines voies (14A) du protocole de communication (18) sont utilisées pour une communication bidirectionelle. Les données extraites par l'intermédiaire du protocole de communication concernant les paramètres d'intérêts sont éliminées et remplacées par des données recueillies de manière indépendante.
PCT/CA1999/000317 1998-04-16 1999-04-13 Lampe tridimensionnelle prete a l'emploi WO1999055122A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU34015/99A AU3401599A (en) 1998-04-16 1999-04-13 3d ready lamp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2,234,486 1998-04-16
CA002234486A CA2234486A1 (fr) 1998-04-16 1998-04-16 Lampe intelligente 3d

Publications (1)

Publication Number Publication Date
WO1999055122A1 true WO1999055122A1 (fr) 1999-10-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1999/000317 WO1999055122A1 (fr) 1998-04-16 1999-04-13 Lampe tridimensionnelle prete a l'emploi

Country Status (3)

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AU (1) AU3401599A (fr)
CA (1) CA2234486A1 (fr)
WO (1) WO1999055122A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020936A1 (fr) * 1998-10-02 2000-04-13 Acoustic Positioning Research Inc. Systeme de commande pour dispositifs a actionnement variable
WO2008155697A2 (fr) 2007-06-18 2008-12-24 Koninklijke Philips Electronics N.V. Unité d'éclairage à direction réglable
EP3393213A1 (fr) * 2017-04-03 2018-10-24 ROBE lighting s.r.o. Système de commande de projecteur de poursuite
GB2581418A (en) * 2018-12-10 2020-08-19 Electronic Theatre Controls Inc Systems and methods for determining lighting fixture arrangement information
IT201900019634A1 (it) * 2019-10-23 2021-04-23 Osram Gmbh Apparecchiatura di illuminazione, impianto, procedimento e prodotto informatico corrispondenti
EP3813493A1 (fr) * 2019-10-23 2021-04-28 OSRAM GmbH Appareil d'éclairage et système correspondant, procédé et produit programme informatique

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716344A (en) * 1986-03-20 1987-12-29 Micro Research, Inc. Microprocessor controlled lighting system
US4797795A (en) * 1982-11-19 1989-01-10 Michael Callahan Control system for variable parameter lighting fixtures
WO1989005421A1 (fr) * 1987-12-02 1989-06-15 Morpheus Lights, Inc. Systeme d'eclairage de scene
CH671821A5 (en) * 1986-06-18 1989-09-29 Enrico Schneider Stage lighting system for providing different lightingeffects
EP0534710A1 (fr) * 1991-09-26 1993-03-31 Vari-Lite, Inc. Système d'éclairage commandé par ordinateurs avec un réseau de distribution de données intelligent
GB2267160A (en) * 1992-05-21 1993-11-24 Flying Pig Systems Limited Light system configuration
EP0591899A1 (fr) * 1992-10-08 1994-04-13 Ushio U-Tech Inc. Système automatique de contrôle pour un projecteur
WO1994008437A1 (fr) * 1992-09-25 1994-04-14 Light & Sound Design Limited Lampe d'eclairage scenique et systeme d'eclairage scenique comprenant cette lampe
US5353336A (en) * 1992-08-24 1994-10-04 At&T Bell Laboratories Voice directed communications system archetecture
US5668537A (en) * 1993-11-12 1997-09-16 Chansky; Leonard M. Theatrical lighting control network

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4797795A (en) * 1982-11-19 1989-01-10 Michael Callahan Control system for variable parameter lighting fixtures
US4716344A (en) * 1986-03-20 1987-12-29 Micro Research, Inc. Microprocessor controlled lighting system
CH671821A5 (en) * 1986-06-18 1989-09-29 Enrico Schneider Stage lighting system for providing different lightingeffects
WO1989005421A1 (fr) * 1987-12-02 1989-06-15 Morpheus Lights, Inc. Systeme d'eclairage de scene
EP0534710A1 (fr) * 1991-09-26 1993-03-31 Vari-Lite, Inc. Système d'éclairage commandé par ordinateurs avec un réseau de distribution de données intelligent
GB2267160A (en) * 1992-05-21 1993-11-24 Flying Pig Systems Limited Light system configuration
US5353336A (en) * 1992-08-24 1994-10-04 At&T Bell Laboratories Voice directed communications system archetecture
WO1994008437A1 (fr) * 1992-09-25 1994-04-14 Light & Sound Design Limited Lampe d'eclairage scenique et systeme d'eclairage scenique comprenant cette lampe
EP0591899A1 (fr) * 1992-10-08 1994-04-13 Ushio U-Tech Inc. Système automatique de contrôle pour un projecteur
US5668537A (en) * 1993-11-12 1997-09-16 Chansky; Leonard M. Theatrical lighting control network

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020936A1 (fr) * 1998-10-02 2000-04-13 Acoustic Positioning Research Inc. Systeme de commande pour dispositifs a actionnement variable
WO2008155697A2 (fr) 2007-06-18 2008-12-24 Koninklijke Philips Electronics N.V. Unité d'éclairage à direction réglable
US8319440B2 (en) 2007-06-18 2012-11-27 Koninklijke Philips Electronics N.V. Direction controllable lighting unit
EP3393213A1 (fr) * 2017-04-03 2018-10-24 ROBE lighting s.r.o. Système de commande de projecteur de poursuite
GB2581418A (en) * 2018-12-10 2020-08-19 Electronic Theatre Controls Inc Systems and methods for determining lighting fixture arrangement information
US11304282B2 (en) 2018-12-10 2022-04-12 Electronic Theatre Controls, Inc. Systems and methods for determining lighting fixture arrangement information
GB2581418B (en) * 2018-12-10 2022-06-15 Electronic Theatre Controls Inc Systems and methods for determining lighting fixture arrangement information
US11546982B2 (en) 2018-12-10 2023-01-03 Electronic Theatre Controls, Inc. Systems and methods for determining lighting fixture arrangement information
IT201900019634A1 (it) * 2019-10-23 2021-04-23 Osram Gmbh Apparecchiatura di illuminazione, impianto, procedimento e prodotto informatico corrispondenti
EP3813493A1 (fr) * 2019-10-23 2021-04-28 OSRAM GmbH Appareil d'éclairage et système correspondant, procédé et produit programme informatique
US11178745B2 (en) 2019-10-23 2021-11-16 Osram Gmbh Lighting apparatus and corresponding system, method and computer program product
US11382201B2 (en) 2019-10-23 2022-07-05 Osram Gmbh Lighting apparatus, and corresponding system, method and computer program product

Also Published As

Publication number Publication date
AU3401599A (en) 1999-11-08
CA2234486A1 (fr) 1999-10-16

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