EP2598865A2 - Sonde de mesure destinée à être plongée dans une chambre de mesure ou dans une conduite de mesure - Google Patents

Sonde de mesure destinée à être plongée dans une chambre de mesure ou dans une conduite de mesure

Info

Publication number
EP2598865A2
EP2598865A2 EP11782370.8A EP11782370A EP2598865A2 EP 2598865 A2 EP2598865 A2 EP 2598865A2 EP 11782370 A EP11782370 A EP 11782370A EP 2598865 A2 EP2598865 A2 EP 2598865A2
Authority
EP
European Patent Office
Prior art keywords
probe
measuring
transducer
wall
channel
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.)
Withdrawn
Application number
EP11782370.8A
Other languages
German (de)
English (en)
Inventor
Markus Muenzer
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.)
Testo SE and Co KGaA
Original Assignee
Testo SE and Co KGaA
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 Testo SE and Co KGaA filed Critical Testo SE and Co KGaA
Publication of EP2598865A2 publication Critical patent/EP2598865A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • 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
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/521—Constructional features

Definitions

  • Probe for immersion in a measuring chamber or a measuring channel
  • the invention relates to a measuring probe for immersion in a measuring chamber or a measuring channel.
  • the invention particularly relates to a measuring probe for measuring the local flow velocity at a plurality of positions of a cross-sectional area of a flow channel.
  • each measured variable can be detected reliably with individual measuring devices; Comfortable and easy to handle are handy multifunction measuring instruments with attachable probes. In any case, not only the "how” but also the "where" is important in a measurement because there are more or less suitable measuring locations for each measured variable. If, for example, the volume flow is to be determined, the flow velocity can be measured at several points of the cross-sectional area through the flow channel, for example, and a flow rate averaged over the channel cross-section can be calculated. The volume flow (m 3 / s) is then obtained by multiplying the average flow velocity by the area of the channel cross section.
  • the flow rate - but also other measured variables can be measured with a rod-shaped measuring probe (eg telescope probe), which is immersed in the flow channel through relatively no openings in the channel wall, wherein the sensitive to the physical quantity to be measured sensor element at the top of the probe is arranged.
  • the sensor element may be a small impeller or a hot wire sensor.
  • the sensor element is positioned as accurately as possible at a predefined measurement position in the cross-sectional area of the flow channel during the measurement. For certain measurements, a measured value recording is standardized at several positions in the channel. Inaccuracies in the positioning can falsify the measurement result in an undesirable manner.
  • One object of the present invention is to provide a measuring probe for immersion in a measuring channel or in a measuring chamber, with the aid of which a physical variable of interest in the measuring channel or in the measuring chamber can be reliably measured at a predetermined position.
  • a measuring probe for measuring a physical property of a medium (measurand) in a measuring channel or a measuring chamber comprises: a rod-shaped probe body for immersion in the medium through an opening of a wall of the channel or the measuring chamber; a handle disposed at a first end of the rod-shaped probe body; a sensor element disposed at a second end of the rod-shaped probe body and configured to generate an electrical sensor signal dependent on the physical property to be measured; and one connected to the rod-shaped probe body Transducer, which is designed to measure without contact the position of the sensor element relative to the wall.
  • the method comprises the following steps: immersing the probe in the channel or in the measuring chamber through an opening in the wall; non-contact measurement of the position of the probe relative to the wall by means of the transducer; and signaling to a user if the probe has assumed a desired setpoint position relative to the wall.
  • Figure 1 is a perspective view of a probe with rod-shaped probe body and a transducer for non-contact position measurement according to a
  • FIG. 2 shows a side view of the measuring probe from FIG. 1 in a reference position defined by a stop relative to a flow channel
  • FIG. 3 shows a side view of the measuring probe from FIG. 2 during insertion of the measuring probe into the flow channel towards a setpoint position
  • Figure 4 is a side view of the measuring probe of Figure 2 or 3 in the desired desired position relative to the inner surface of the wall of the flow channel.
  • FIG. 5 shows a block diagram for illustrating the mode of operation of the measuring probe from FIGS. 1 to 4.
  • FIG. 1 shows a perspective view of a measuring probe according to an exemplary embodiment of the present invention.
  • probes for measuring one or more interesting physical quantities eg temperature, humidity, flow velocity, etc.
  • probes with a rod-shaped probe body 11 are frequently used, which are inserted through a (closable) opening 41 in FIG the wall 40 of the channel or the measuring chamber can be immersed in the interior 42.
  • the example described below relates to the measurement of the flow velocity in the interior 41 of a ventilation duct of an air conditioning system.
  • the invention is not limited to this application.
  • arbitrary physical quantities can be measured in the same way as the flow velocity in the interior of any measuring chambers.
  • the sensor element 12 for measuring the flow speed.
  • a sensor element 12 thus come an impeller with tachometer or a hot wire anemometer in question.
  • the measuring probes differ essentially only in the sensor element 12 which is sensitive to the respective measured variable and which is arranged at that end of the rod-shaped probe body 11 which dips into the interior 42 of the measuring channel or the measuring chamber.
  • the sensor element 12 generates a physical quantity to be measured
  • a handle 13 can be arranged, which facilitates the handling of the probe.
  • a transducer 20 (transmitter 22 and receiver 21 or a transmitter / receiver) which is adapted to measure without contact the position of the sensor element 12 relative to the channel wall 40.
  • the transducer 20 is a distance sensor for non-contact distance measurement, for example an ultrasonic transducer or an optical distance sensor.
  • the transducer 20 is incorporated in the handle 13. This can be useful in many cases, but is not mandatory.
  • the transducer 20 can also be arranged on a separate housing on the probe body. The measuring direction of the transducer 20 is parallel to the longitudinal axis of the rod-shaped probe body 11 in the direction of the sensor element 12.
  • a stop element 13 is arranged on the probe body at a defined distance a from the sensor element.
  • the probe body by 11 may be a telescopic rod whose length is set before the measurement. Regardless of whether the length of the probe body 11 is adjustable or not, the length of the probe body is constant during operation (while taking a series of measurements). Consequently, in a measurement, the stopper member 13 also has a defined distance xo to the transducer 20.
  • the stopper member 13 can be brought into abutment with the wall 40 (for example, with the inner surface of the wall 40) of the flow channel. This position of the measuring probe (and thus of the sensor element) can be considered as a reference position for the further measurements.
  • a measuring procedure is explained in more detail below with reference to FIGS. 2 to 4.
  • the end of the measuring probe on which the sensor element 12 is arranged, as shown in Fig. 2 is inserted through an opening 41 in the wall 40 of the measuring channel.
  • the measuring probe can be moved by means of the stop element 13 on the inner surface.
  • the channel wall 40 are brought into abutment at the edge of the opening, so that the relative position between the probe and channel wall 40 is clearly defined and thus also the relative position of the transducer 20 to the channel wall.
  • Channel wall 40 recorded and stored as a reference value.
  • This calibration procedure is comparable to the taring of a balance and is not absolutely necessary.
  • the calibration can compensate for differences in the wall thickness of the channel wall when the transducer is outside the measurement channel and measures the distance to the outer surface of the channel wall, whereas for the positioning of the sensor element 12 its distance (in the reference position this a) to the inner surface of the channel wall 40 is relevant. If the wall thickness is negligibly small or is considered separately by the operator, the calibration can be omitted.
  • the probe body 11 (as shown in Figures 1 to 4) is formed as a telescopic rod, there is still another way of calibrating the subsequent position measurements.
  • the telescopic rod can be brought at least into an inserted and an extended position, the length difference between the length of the probe body 11 in the extended position and the length AL in the inserted position to be known or otherwise measured.
  • the probe body 11 is brought in the inserted position into a defined by the stop 13 reference position x 0 , in which the stop 13 against the channel wall 40, in particular on the inside, is applied.
  • a first non-contact reference measurement is performed, in which a first reference measured value t x is recorded with the transducer 20 (in the case of an ultrasonic transducer, this measured value is a time).
  • This reference measured value t x represents the relative position of the transducer relative to the channel wall 40.
  • the probe body 11 is in the inserted position during the first reference measurement in the reference position defined by the stop 13.
  • the telescopic rod is pulled out and carried out a second reference measurement in which a second reference measured value t2 is recorded with the transducer 20.
  • the second measured value t 2 defines the zero point for the following position measurements, which corresponds to the above-mentioned taring of the measurement as with a balance.
  • the sensitivity AL / At of the transducer 20 can be determined. This value can be stored and used for calibration of the subsequent position measurements, which of course are performed with the probe body 11 extended.
  • the probe is further immersed in the measuring channel to bring the sensor element 12 in a desired target position. This process is outlined in FIG. In FIG. 4, the measuring probe is in one
  • Target position for the measurement data acquisition In comparison to the reference position xo, the distance between the transducer 20 and the inner surface of the channel wall 40 is smaller by the value t, that is to say xout.
  • the sensor element 12 is consequently located at a distance a + t (immersion depth) from the inner surface of the channel wall 40, through which the measuring probe is inserted.
  • FIG. 5 illustrates the function of the measuring probe during operation on the basis of a block diagram.
  • the measuring probe has a signal processing unit 30, which is e.g. can be arranged in the handle 13 of the probe.
  • the signal processing unit 30 may also be spatially distributed.
  • components of the signal processing unit 30 may also be arranged in the vicinity of the sensor element 12 or else separately in an external device.
  • the output signal of the sensor element 12 (sensor signal) is supplied to the signal processing unit 30, furthermore, the transducer 20 is connected to the signal processing unit 30.
  • the signal processing unit 30 is adapted to the
  • the signal processing unit 30 may further be configured to store the corresponding detected immersion depth a + t of the sensor element 12 for a measured value obtained from the sensor element 12, ie value pairs from the measured value and position of the sensor element 12 are stored during the measured value recording.
  • the signal processing unit 30 may comprise a memory or an external memory may be provided.
  • the exact measuring location is known and, in the case of flow measurement, for example, an airfoil (flow velocity over position) can be calculated.
  • the wall thickness of the wall 40 can be stored in the memory and taken into account in the distance calculation by the signal processing unit 30.
  • a plurality of successive desired positions of a measurement series can be stored in the memory.
  • the probe may include a user interface 31 for inputting commands by a user and for outputting information to the user.
  • the operator can trigger the above-mentioned calibration process (eg via a push-button), when the measuring probe is at the reference position.
  • the user can zerauerstelle 31 indicate to the user whether the probe is at the desired target position, whether they are further immersed in the channel 40, or the immersion depth must be reduced.
  • the user cut parts 31 may include one or more optical signal transmitters, a display, a buzzer or the like. exhibit.
  • the transducer 20 is connected to the probe body 11 outside the measuring channel or the measuring chamber.
  • the transducer 20 can also be arranged at the other end (or in its vicinity) of the sensor body 11 (in the vicinity of the S), so that it is introduced with the sensor element 12 into the interior 42 of the channel. In this case, the transducer on both the opening 41 opposite channel wall

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Chemical & Material Sciences (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Food Science & Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Fluid Mechanics (AREA)
  • Analytical Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

L'invention concerne une sonde de mesure destinée à la mesure d'une propriété physique d'un milieu dans une conduite ou une chambre de mesure. La sonde de mesure comprend un corps de sonde en forme de tige destiné à être plongé dans le milieu par une ouverture ménagée dans la paroi de la conduite ou de la chambre de mesure, une poignée disposée à une première extrémité du corps de sonde en forme de tige, un élément capteur disposé à une deuxième extrémité du corps de sonde en forme de tige et conçu pour générer un signal de capteur électrique en fonction de la propriété physique à mesurer, et un émetteur/récepteur relié au corps de sonde en forme de tige et conçu pour mesurer sans contact la position de l'élément capteur relativement à la paroi.
EP11782370.8A 2010-07-30 2011-07-05 Sonde de mesure destinée à être plongée dans une chambre de mesure ou dans une conduite de mesure Withdrawn EP2598865A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010038734A DE102010038734A1 (de) 2010-07-30 2010-07-30 Messsonde zum Eintauchen in eine Messkammer bzw. einen Messkanal
PCT/DE2011/050025 WO2012019603A2 (fr) 2010-07-30 2011-07-05 Sonde de mesure destinée à être plongée dans une chambre de mesure ou dans une conduite de mesure

Publications (1)

Publication Number Publication Date
EP2598865A2 true EP2598865A2 (fr) 2013-06-05

Family

ID=44970901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11782370.8A Withdrawn EP2598865A2 (fr) 2010-07-30 2011-07-05 Sonde de mesure destinée à être plongée dans une chambre de mesure ou dans une conduite de mesure

Country Status (3)

Country Link
EP (1) EP2598865A2 (fr)
DE (1) DE102010038734A1 (fr)
WO (1) WO2012019603A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140069171A1 (en) * 2012-09-11 2014-03-13 Purkay Laboratories, Inc. Portable environmental audit tool
DE102016012567A1 (de) 2016-10-21 2018-04-26 Testo SE & Co. KGaA Baukasten zum Bau einer Messvorrichtung
US10768053B2 (en) * 2017-08-30 2020-09-08 Raymond Armstrong Valdez Telescopic thermometer
DK179702B1 (en) * 2017-09-26 2019-04-04 Mark & Wedell A/S. Ingeniør- Og Handelsfirma Device for speed measurement, method and use thereof
CN111555187B (zh) * 2020-04-28 2022-04-08 深圳市科服信息技术有限公司 一种通信施工电缆埋设装置
DE102022129631A1 (de) 2022-11-09 2024-05-16 Endress+Hauser Flowtec Ag Montagewerkzeug zur Montage eines einsteckbaren Durchflussmessgeräts und Verfahren zur Einrichtung eines solchen Durchflussmessgerät

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GB2029030B (en) * 1978-05-31 1982-09-08 Litre Meter Ltd Fluid flowmeter
FR2590977B3 (fr) * 1985-12-02 1988-04-08 Shell France Appareil pour la mesure du niveau de carburant liquide dans un reservoir
DE4016529C1 (en) * 1990-05-22 1991-11-07 Turbo-Werk Messtechnik Gmbh, 5000 Koeln, De Flowmeter for open duct - has flow sensor movable across channel to supply computer with flow speeds measured at several points
DE19812027A1 (de) * 1998-03-19 1999-09-30 Testo Gmbh & Co Messgerät
DE10131656A1 (de) * 2001-06-29 2003-01-30 Itw Befestigungssysteme Bohrungstiefenmesser für ein Bohrgerät
US6584860B1 (en) * 2002-01-14 2003-07-01 Murray F. Feller Flow probe insertion gauge

Non-Patent Citations (1)

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Title
See references of WO2012019603A2 *

Also Published As

Publication number Publication date
WO2012019603A3 (fr) 2012-04-26
DE102010038734A1 (de) 2012-02-02
WO2012019603A2 (fr) 2012-02-16

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