WO2002041003A2 - Analyseur d'ecoulement d'air - Google Patents

Analyseur d'ecoulement d'air Download PDF

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Publication number
WO2002041003A2
WO2002041003A2 PCT/CA2001/001583 CA0101583W WO0241003A2 WO 2002041003 A2 WO2002041003 A2 WO 2002041003A2 CA 0101583 W CA0101583 W CA 0101583W WO 0241003 A2 WO0241003 A2 WO 0241003A2
Authority
WO
WIPO (PCT)
Prior art keywords
data
array
air velocity
air
pressure
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/CA2001/001583
Other languages
English (en)
Other versions
WO2002041003A3 (fr
Inventor
James Kay
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.)
LEADING EDGE ROBOTICS Inc
Original Assignee
LEADING EDGE ROBOTICS Inc
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 LEADING EDGE ROBOTICS Inc filed Critical LEADING EDGE ROBOTICS Inc
Priority to AU2002214888A priority Critical patent/AU2002214888A1/en
Publication of WO2002041003A2 publication Critical patent/WO2002041003A2/fr
Publication of WO2002041003A3 publication Critical patent/WO2002041003A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/001—Full-field flow measurement, e.g. determining flow velocity and direction in a whole region at the same time, flow visualisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area

Definitions

  • Coatings may be paints, adhesives, ink, other chemicals or substrates.
  • a film build profile takes several hours to a day to achieve.
  • a method and apparatus is described for precise measurement of air velocity profile data from coatings applicators.
  • An array of pressure sensing points is inserted into the air stream of a coatings applicator, to derive air velocity data at predefined intervals.
  • a plurality of differential pressure sensors connected to various types of pressure sensing devices comprising an array are used to acquire multiple readings at once, generating a comprehensive display of air velocity data over the entire affected area. Said data is acquired, displayed, and analyzed with custom software and analog to digital microprocessor controllers.
  • a multiplicity of ambient conditions may also be monitored (dew point, humidity, temperature, mass or volumetric air flow, air pressure, and film build data), and subsequently integrated into the analysis software.
  • the present method and apparatus is more accurate, more versatile, faster, cheaper, and provides considerably more data than prior art systems in which single point air velocity readings are acquired and must be manually integrated to form an equivalent data table.
  • Prior art also uses hot wire air velocity detection technology, prohibiting use in hazardous environments.
  • Figure 1 is a front view of a single dimension array
  • Figure 2 is a side view of the single array showing the applicator and the air stream.
  • Figure 3 is a top view of a single array showing the range of motion used to collect all data points in the air stream.
  • Figure 4 is a further side view showing the indexing means.
  • Figure 5 is a matrix array shown in use to measure data from a bell gun type applicator.
  • Figure 6 is a graph of sample data output from the system.
  • Figure 7 is a cross-sectional view of one embodiment of the pitot tube array.
  • Figure 8 is a perspective view of the entire system with accessory components.
  • Figure 9 is a schematic view of the entire air flow analyzing system.
  • Figure 10 is a perspective view of the multi-dimensional sensing array.
  • Figure 11 is a sample data profile produced by the analyzer.
  • the invention teaches a method for precise measurement of air velocity profile data from coatings applicators by utilizing a plurality of pressure sensing ports or mechanisms configured in precise increments of measure from each other, to comprise an array, to acquire total and static air pressure data from the air stream of the coatings applicator.
  • the differential pressure sensors are connected to an array of pressure sensing ports or mechanisms placed in the air stream of the coatings applicator.
  • the pressure sensors are characterized by a sensor component in an electrical circuit with a control means, the sensor component being responsive to applied pressure to modulate an electrical signal applied to it by the control means.
  • the magnitude and polarity of the signal changes according to the magnitude of the applied pressure and the side of the sensor component to which the pressure is applied.
  • the high pressure reference source port is connected to the pressure sensing ports in the air velocity stream (total pressure), and the negative pressure port is connected to known positive and negative pressure sources (static pressure).
  • Analog to digital microprocessors are used to convert the electrical signals from the pressure sensors into numeric data to be interpreted by the control software.
  • the software converts numeric pressure data to air velocity using established fluid dynamics algorithms.
  • the software can acquire, display, and analyze velocity data interpolated from the pressure sensors to present useful coating applicator air velocity data and data analysis to the end user.
  • the custom software can also acquire and control ambient conditions from peripheral sensors and equipment to control testing parameters, including but not limited to air pressure and air flow to the coatings applicator.
  • the array of .pressure sensing ports or mechanisms can use a plurality of pitot tubes to acquire total and static air pressure data. They are configured in precise increments of measure from each other, to comprise an array, to acquire air pressure data from the air stream of the coatings applicator.
  • Singular open ports can also be utilized as sensing ports to acquire total air pressure data, configured in precise increments of measure from each other, to comprise an array, and sensing static pressure in a different location separate from the array and outside of the coating applicator's air velocity window.
  • air cylinders can also be used as sensors, being configured in precise increments of measure from each other, to comprise an array, to acquire air pressure data from the air stream of the coatings applicator.
  • the air cylinders can be provided with calibrated plates attached to a moving piston rod, coupling the ports of the piston to the positive and negative ports of the pressure sensors. The force of the air velocity acting on the plate will displace the piston, generating positive and negative pressure readings that represent total and static air pressure to be converted to air velocity data.
  • the air cylinders can also be used to amplify and/or dampen the air velocity activity existing in the coating applicator air stream.
  • Peripheral sensors and equipment are provided to analyze ambient conditions and compensate or adjust the air velocity data accordingly . to achieve a calibrated or zero state.
  • a single, vertical, single column array of sensors is provided, of appropriate height to encompass or exceed the height of the coating applicator's air stream.
  • This array is indexed with an appropriate actuator across the entirety of the coating applicator's horizontal air stream, recording air velocity.data from the array at each index or interval, compiling said data, to derive a complete image of the air velocity performance of the coating applicator.
  • multiple vertical, single column arrays of sensors are provided, of appropriate height to encompass or exceed the height of the coating applicator's air stream. Indexing these arrays is accomplished with an appropriate actuator across the entirety of the coating applicator's horizontal air stream, recording air velocity data from the array at each index or interval, compiling said data, to derive a complete image of the air velocity performance of the coating applicator.
  • a single, multiple column, multiple row array of sensors is provided, again of appropriate height to encompass or exceed the height of the coating applicator's air stream, and of appropriate width to encompass or exceed the horizontal size of the coating applicator's air stream, recording air velocity data from all of the array points simultaneously, compiling said data, to derive a complete image of the air velocity performance of the coating applicator.
  • An open loop actuator comprised of a stepper motor, coupled to a screw drive or belt drive mechanism, supported by a stabilizing means, and controlled by the system software can be used to move the sensor array before a fixed coating applicator.
  • a closed loop actuator can be used, comprised of a servo motor, coupled to a screw drive or belt drive mechanism, supported by a stabilizing means, and controlled by the system software to move the sensor array.
  • an exterior actuator can be used, comprised of a conveyor system, to move the sensor array.
  • the applicator can be moved instead of the array.
  • a stationary sensor array is provided, and the coating applicator is moved with an external actuator, including open loop and closed loop linear actuators, articulated robot arms, and human manipulation.
  • the system is designed using an approved container for hazardous or explosive environments.
  • the container houses the electrical controls and pressure sensors, attaching sensor arrays, additional sensing equipment, and controls to a carrier mechanism designed for use in the manufacturing environment, powering controls and sensors with re-chargeable batteries, and broadcasting the acquired data wirelessly to a server, for achieving a means of distributing the data to multiple users.
  • Data can be distributed to multiple users over a LAN, said data displayed on desktop PC's websites, and/or handheld computing devices, and being accessible worldwide and in real-time.
  • the present system uses an array of velocity sensors, instead of the prior single sensor, to provide greater accuracy, improved resolution, and reduced testing times.
  • a single vertical array of velocity sensors replaces the single point sensor on existing systems, and provides a great deal of new information.
  • the array eliminates the need for manual interpolation of multiple tests at different heights from the centerline of the paint gun.
  • Paint guns currently being tested with the prior art use an air atomizing technique to atomize the paint, and fan air to shape the pattern. This results in an oval shaped pattern of paint, ranging in width from 300 to 500 mm, and in height from 100 to 200 mm.
  • a typical single-point test with the prior art takes about 90 seconds, using a 10mm index size, and a 600mm effective stroke. This produces a single slice of data, and would have to be repeated as many as 10 to 20 times at varying heights (in 10mm increments) to capture the same data as the present system.
  • the accumulated testing time would be 900 to 1800 seconds.
  • a multi-dimensional array of velocity sensors can be used. This eliminates the need to index the applicator or the velocity sensor, and also provides real time data regarding air velocity performance and fluid dynamics phenomenon.
  • a bell gun is particular style or methodology of paint gun that uses a rotary atomizer and shaping air to distribute paint.
  • the pattern produced by this method of painting is large and round.
  • the pattern is similar to the shape of a bell (hence the name), and the pattern area is typically in the range of 20" to 30" in diameter.
  • the single point test method will not work in this application, as the number of data points is so large, and the area is also 2-dimensional. Taking single data points will not provide the data required.
  • the sensor array may take the form of a 1 " x 1" matrix, 30" x 30" square in size, resulting in 900 sensors acquiring data at once.
  • the size and spacing of the sensors is arbitrary and may increase or decrease depending on the required resolution dictated by the customer.
  • the present system would allow the user to qualify the output of each system by viewing the end result: air velocity profiles from the paint gun.
  • Use of the aforementioned multi-dimensional air velocity sensor array would allow users to test their equipment as they use it. This may show problems with air velocity performance as the robots move thru different motions (kinking and air line or fluid line).

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spray Control Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé, un appareil et un système permettant de réaliser des mesures précises de la vitesse de l'air à partir d'applicateurs de revêtements tels que des pistolets à peinture. On utilise des réseaux de détection multidimensionnels pour établir des données de vitesse de l'air. Ce système peut se présenter sous la forme d'une unité intégrée. Il peut également être conçu de manière que le réseau de détection soit installé séparément en vue d'un actionnement à distance dans des environnements dangereux.
PCT/CA2001/001583 2000-11-16 2001-11-16 Analyseur d'ecoulement d'air Ceased WO2002041003A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002214888A AU2002214888A1 (en) 2000-11-16 2001-11-16 Method for automatic measurement of the velocity profile in a gas jet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24884500P 2000-11-16 2000-11-16
US60/248,845 2000-11-16

Publications (2)

Publication Number Publication Date
WO2002041003A2 true WO2002041003A2 (fr) 2002-05-23
WO2002041003A3 WO2002041003A3 (fr) 2002-09-12

Family

ID=22940924

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/001583 Ceased WO2002041003A2 (fr) 2000-11-16 2001-11-16 Analyseur d'ecoulement d'air

Country Status (2)

Country Link
AU (1) AU2002214888A1 (fr)
WO (1) WO2002041003A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011035886A1 (fr) * 2009-09-24 2011-03-31 Dürr Systems GmbH Procédé de contrôle du fonctionnement d'un pulvérisateur rotatif et installation d'enduction correspondante
EP2645111A1 (fr) * 2012-03-27 2013-10-02 The Boeing Company Système de mappage du profil de vitesse
WO2014143403A1 (fr) * 2013-03-14 2014-09-18 Dieterich Standard, Inc. Ensemble de traverse de tube de pitot
EP3537126A1 (fr) * 2018-03-07 2019-09-11 Sugino Machine Limited Dispositif d'inspection de buse et procédé d'inspection de buse

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6189390B1 (en) * 1998-04-02 2001-02-20 Compliance Instrument, Inc. Method and apparatus for measuring gas velocity or other flow characteristic

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011035886A1 (fr) * 2009-09-24 2011-03-31 Dürr Systems GmbH Procédé de contrôle du fonctionnement d'un pulvérisateur rotatif et installation d'enduction correspondante
CN102510776A (zh) * 2009-09-24 2012-06-20 杜尔系统有限责任公司 用于旋转喷雾器的功能控制的方法及相应的涂覆设备
US20120180723A1 (en) * 2009-09-24 2012-07-19 Harald Gummlich Method for controlling the function of a rotary atomizer and corresponding coating installation
JP2013505817A (ja) * 2009-09-24 2013-02-21 デュール システムズ ゲゼルシャフト ミット ベシュレンクテル ハフツング 回転アトマイザーの機能を検査する方法、および対応するコーティング装置
CN102510776B (zh) * 2009-09-24 2015-10-14 杜尔系统有限责任公司 用于旋转喷雾器的功能控制的方法及相应的涂覆设备
EP2645111A1 (fr) * 2012-03-27 2013-10-02 The Boeing Company Système de mappage du profil de vitesse
US9523703B2 (en) 2012-03-27 2016-12-20 The Boeing Company Velocity profile mapping system
WO2014143403A1 (fr) * 2013-03-14 2014-09-18 Dieterich Standard, Inc. Ensemble de traverse de tube de pitot
US8960018B2 (en) 2013-03-14 2015-02-24 Dieterich Standard, Inc. Pitot tube traverse assembly
EP3537126A1 (fr) * 2018-03-07 2019-09-11 Sugino Machine Limited Dispositif d'inspection de buse et procédé d'inspection de buse
CN110261061A (zh) * 2018-03-07 2019-09-20 杉野机械股份有限公司 喷嘴的检查装置以及喷嘴的检查方法

Also Published As

Publication number Publication date
AU2002214888A1 (en) 2002-05-27
WO2002041003A3 (fr) 2002-09-12

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