US20050167423A1 - Function-supervising device - Google Patents

Function-supervising device Download PDF

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Publication number
US20050167423A1
US20050167423A1 US11/025,862 US2586204A US2005167423A1 US 20050167423 A1 US20050167423 A1 US 20050167423A1 US 2586204 A US2586204 A US 2586204A US 2005167423 A1 US2005167423 A1 US 2005167423A1
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US
United States
Prior art keywords
indicating
current
heating
consumer
function
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.)
Abandoned
Application number
US11/025,862
Inventor
Martin Buschmann
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.)
Joseph Voegele AG
Original Assignee
Joseph Voegele AG
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 Joseph Voegele AG filed Critical Joseph Voegele AG
Assigned to JOSEPH VOGELE AG reassignment JOSEPH VOGELE AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BUSCHMANN, MARTIN
Publication of US20050167423A1 publication Critical patent/US20050167423A1/en
Priority to US11/634,015 priority Critical patent/US7635829B2/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/15—Indicating the presence of current
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/10—Heated screeds

Definitions

  • the invention relates to a device for supervising the function of an electric consumer connected in a supply circuit, said electric consumer being in particular a heating unit in a road finisher.
  • Road finishers are provided with a large number of heating elements and heating units which heat a great a great variety of work components that come into contact with the heated paving material for producing road surfaces, so as to avoid, on the one hand, premature cooling of said paving material and so to prevent, on the other hand, the paving material from solidifying on and adhering to the cold surfaces of the respective work component.
  • These heating units must be supervised so as to guarantee in any case that the predetermined temperature of the work component is reached and maintained.
  • US-B 6 334 735 discloses an automatically controlled heating system for a road finisher in which a control system is used, which automatically adjusts the flow of current through the heating element so as to regulate the temperature.
  • At least one temperature sensor is used for supervising the heating unit and the temperature produced by said heating unit.
  • a temperature sensor especially when used in the manner described, is, however, unable to satisfactorily supervise each individual heating unit, especially each individual heating rod in a heating unit, so as to find out whether the heating rod in question is faulty or whether it works correctly. It can only be detected whether the heating unit in its entirety is able to reach and maintain the desired temperature.
  • a faulty heating unit could, however, be repaired much more easily, if it were possible to find out immediately that one of the heating rods is faulty and which one it is.
  • a device for supervising the function of an electric consumer in particular a heating unit in a road finisher, connected in a supply circuit, said device comprising an induction coil which is associated with the consumer (2) and which is connected to means for detecting and indicating a voltage induced in the coil by the supply current.
  • Induction coils can be provided and installed easily and they are robust in operation so that functions can be supervised reliably by them.
  • a light emitting diode when used as an indicator means, said light emitting diode defining in connection with the induction coil a passive system which does not have a supply voltage of its own.
  • the device according to the present invention which includes an induction coil and a light emitting diode, is also suitable for consumers which are operated with alternating current or a three-phase current.
  • the device according to the present invention is primarily suitable for supervising the function of heating elements and heating rods in a road finisher, in view of the fact that the device according to the present invention is very robust and reliable; it can, however, also be used for supervising the function in any other electric consumer.
  • the FIGURE shows an only schematically indicated device 1 for supervising the function of an electric consumer 2 supplied with electric power via a supply circuit 3 (230V).
  • the consumer 2 is preferably a single heating element or a heating rod within a heating circuit 3 a for heating work components of a road finisher, i.e. for heating the various parts of a paving screed or the like.
  • the consumer 2 has associated therewith simple means for current/voltage measurement, which are implemented as an induction coil 4 .
  • the induction coil 4 is directly integrated in the supply circuit 3 , but it may also be associated with e.g. the heating spiral of the consumer 2 .
  • the induction coil 4 supplies an indicator circuit 5 with electric power, said indicator circuit having arranged therein means for detecting and indicating the flow of a current in the form of a light emitting diode 6 . It follows that, when a current flows in the supply circuit 3 , the light emitting diode 6 will emit light.
  • the indicator circuit 5 comprises a rectifier circuit 7 with a further oppositely connected diode or a resistor for the second half-wave.
  • a voltage is induced in the coil 4 by the alternating voltage in the supply circuit 3 and/or in the area of the heating wire of the consumer 2 ; said voltage is converted into a signal in a unit, e.g. in the LED 6 shown, i.e. the LED 6 will emit light. If the current supply is interrupted, the induction effect will cease and the indicator, e.g. the LED, will go out.
  • the device 1 according to the present invention may additionally also be provided with a circuit which is capable of evaluating different voltage/current levels.
  • the measurement data can either be indicated directly or they can be processed, like the simple YES- or NO-signals, so as to obtain instructions (e.g. “heating X out of order”) or other indicative signals.
  • the lead for connecting a heating rod normally extends from a terminal box on the paving screed of a road finisher.
  • the lead is in this case conducted through a screwed cable gland on the terminal box.
  • this screwed cable gland can be implemented as an induction coil provided with means for detecting and indicating a flow of current, said means being e.g. a light emitting diode.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • General Induction Heating (AREA)
  • Cookers (AREA)

Abstract

A device (1) for supervising the function of an electric consumer (2), such as a heating unit in a road finisher, is connected in a supply circuit (3) of electrical current of a consumer, and has an induction coil (4) associated with the current supply to which is connected a circuit (6) for detecting and indicating a voltage induced in the coil (4) by the supply current.

Description

  • The invention relates to a device for supervising the function of an electric consumer connected in a supply circuit, said electric consumer being in particular a heating unit in a road finisher.
  • Road finishers are provided with a large number of heating elements and heating units which heat a great a great variety of work components that come into contact with the heated paving material for producing road surfaces, so as to avoid, on the one hand, premature cooling of said paving material and so to prevent, on the other hand, the paving material from solidifying on and adhering to the cold surfaces of the respective work component. These heating units must be supervised so as to guarantee in any case that the predetermined temperature of the work component is reached and maintained. US-B 6 334 735, for example, discloses an automatically controlled heating system for a road finisher in which a control system is used, which automatically adjusts the flow of current through the heating element so as to regulate the temperature. For supervising the heating unit and the temperature produced by said heating unit, at least one temperature sensor is used. A temperature sensor, especially when used in the manner described, is, however, unable to satisfactorily supervise each individual heating unit, especially each individual heating rod in a heating unit, so as to find out whether the heating rod in question is faulty or whether it works correctly. It can only be detected whether the heating unit in its entirety is able to reach and maintain the desired temperature.
  • A faulty heating unit could, however, be repaired much more easily, if it were possible to find out immediately that one of the heating rods is faulty and which one it is.
  • It is therefore the object of the present invention to provide a device for supervising the function of an electric consumer, which permits each individual consumer to be easily supervised at a reasonable price and in a reliable manner.
  • This object is achieved by a device for supervising the function of an electric consumer, in particular a heating unit in a road finisher, connected in a supply circuit, said device comprising an induction coil which is associated with the consumer (2) and which is connected to means for detecting and indicating a voltage induced in the coil by the supply current.
  • By means of the embodiment according to the present invention it is possible to detect in each individual supply circuit, without major expense being incurred, whether current flows in the respective circuit. Induction coils can be provided and installed easily and they are robust in operation so that functions can be supervised reliably by them.
  • Advantageous further developments of the present invention can be gathered from the subclaims.
  • It will be particularly advantageous, when a light emitting diode is used as an indicator means, said light emitting diode defining in connection with the induction coil a passive system which does not have a supply voltage of its own.
  • In combination with a rectifier circuit, the device according to the present invention, which includes an induction coil and a light emitting diode, is also suitable for consumers which are operated with alternating current or a three-phase current.
  • By means of a measurement device which is connected to the induction coil, it is additionally possible to obtain precise measurement data and to display them directly or in a processed form.
  • The device according to the present invention is primarily suitable for supervising the function of heating elements and heating rods in a road finisher, in view of the fact that the device according to the present invention is very robust and reliable; it can, however, also be used for supervising the function in any other electric consumer.
  • In the following, one embodiment of the present invention will be explained in detail making reference to the single drawing, which shows a circuit diagram of a device according to the present invention.
  • The FIGURE shows an only schematically indicated device 1 for supervising the function of an electric consumer 2 supplied with electric power via a supply circuit 3 (230V). The consumer 2 is preferably a single heating element or a heating rod within a heating circuit 3 a for heating work components of a road finisher, i.e. for heating the various parts of a paving screed or the like. The consumer 2 has associated therewith simple means for current/voltage measurement, which are implemented as an induction coil 4. In the embodiment shown, the induction coil 4 is directly integrated in the supply circuit 3, but it may also be associated with e.g. the heating spiral of the consumer 2. The induction coil 4 supplies an indicator circuit 5 with electric power, said indicator circuit having arranged therein means for detecting and indicating the flow of a current in the form of a light emitting diode 6. It follows that, when a current flows in the supply circuit 3, the light emitting diode 6 will emit light. When an alternating current or a three-phase current flows in the supply circuit 3, as is normally the case in heating units used in road finishers, the indicator circuit 5 comprises a rectifier circuit 7 with a further oppositely connected diode or a resistor for the second half-wave.
  • Wen the device is in operation, a voltage is induced in the coil 4 by the alternating voltage in the supply circuit 3 and/or in the area of the heating wire of the consumer 2; said voltage is converted into a signal in a unit, e.g. in the LED 6 shown, i.e. the LED 6 will emit light. If the current supply is interrupted, the induction effect will cease and the indicator, e.g. the LED, will go out.
  • The device 1 according to the present invention may additionally also be provided with a circuit which is capable of evaluating different voltage/current levels.
  • It is also possible to provide a measurement device by means of which a flow of current is not only detected but also measured; in this case, the measurement data can either be indicated directly or they can be processed, like the simple YES- or NO-signals, so as to obtain instructions (e.g. “heating X out of order”) or other indicative signals.
  • As a modification of the embodiment described and shown hereinbefore, other suitable means for detecting and indicating a flow of current, preferably means which do not require an additional supply voltage, can be used.
  • The lead for connecting a heating rod normally extends from a terminal box on the paving screed of a road finisher. The lead is in this case conducted through a screwed cable gland on the terminal box. In a preferred embodiment, this screwed cable gland can be implemented as an induction coil provided with means for detecting and indicating a flow of current, said means being e.g. a light emitting diode.

Claims (8)

1. A device for supervising the function of an electric consumer, in the form of a heating unit in a road finisher, connected in a supply circuit of electrical current, said device comprising:
an induction coil associated with the current supply circuit for the consumer; and
means associated with the induction coil for detecting and indicating a voltage induced in the coil by the supply current.
2. A device according to claim 1, wherein said means for indicating comprise a visual indicator.
3. A device according to claim 1, wherein said means for indicating comprise a light emitting diode.
4. A device according to claim 3, wherein if the electric consumer is operated with alternating electrical current or with a three-phase electrical current, the device further comprises a rectifier circuit in which the light emitting diode is connected.
5. A device according to claim 1 wherein said means for detecting and indicating comprises a measuring instrument.
6. A road finisher comprising:
at least one electric heating unit connected in a supply circuit of electrical current and used for heating work components, and a device according to claim for supervising the function of said heating unit.
7. A road finisher according to claim 6 wherein said means for indicating according to claim 1 comprises a visual indicator.
8. A road finisher according to claim 3 wherein said means for indicating according to claim 1 comprises a light emitting diode.
US11/025,862 2004-01-22 2004-12-29 Function-supervising device Abandoned US20050167423A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/634,015 US7635829B2 (en) 2004-01-22 2006-12-04 Function-supervising device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004003356A DE102004003356B4 (en) 2004-01-22 2004-01-22 Road paver with functional monitoring of a heating device
DE102004003356.0 2004-01-22

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/634,015 Continuation-In-Part US7635829B2 (en) 2004-01-22 2006-12-04 Function-supervising device

Publications (1)

Publication Number Publication Date
US20050167423A1 true US20050167423A1 (en) 2005-08-04

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US11/025,862 Abandoned US20050167423A1 (en) 2004-01-22 2004-12-29 Function-supervising device
US11/634,015 Active 2025-11-14 US7635829B2 (en) 2004-01-22 2006-12-04 Function-supervising device

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Application Number Title Priority Date Filing Date
US11/634,015 Active 2025-11-14 US7635829B2 (en) 2004-01-22 2006-12-04 Function-supervising device

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US (2) US20050167423A1 (en)
EP (1) EP1557492B1 (en)
DE (2) DE102004003356B4 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080029285A1 (en) * 2006-08-03 2008-02-07 Kelly Michael W Bolt heater
US20110083708A1 (en) * 2009-10-12 2011-04-14 Ultrasonic Power Corporation Ultrasonic Cleaning System with Transducer Failure Indicator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2281947B2 (en) * 2009-06-26 2022-04-13 Joseph Vögele AG Road finisher with automatic motor control
CN104637238A (en) * 2015-02-03 2015-05-20 国家电网公司 Transformer substation terminal box and mechanism box heating moisture-dispelling alarm device
DE102015012298A1 (en) 2015-09-23 2017-03-23 Abg Allgemeine Baumaschinen-Gesellschaft Mbh Method of operating a self-propelled road paver and paver therefor
DE102017002225A1 (en) 2016-03-18 2017-09-21 Bomag Gmbh Road paver with control unit for determining the weight and / or the center of gravity and / or the width of the screed and method

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US4716520A (en) * 1986-01-22 1987-12-29 Nordson Corporation Method of checking channel connections and detecting heater circuit and temperature sensor malfunctions in multi-channel closed loop hot melt heating systems
US5256859A (en) * 1991-06-14 1993-10-26 General Binding Corporation Power supply for binding apparatus
US5356238A (en) * 1993-03-10 1994-10-18 Cedarapids, Inc. Paver with material supply and mat grade and slope quality control apparatus and method
US5908459A (en) * 1996-02-17 1999-06-01 Abg Allgemeine Baumaschinen-Gesellschaft Mbh Road finisher having a plurality of control systems with interchangeable control processors
US6172647B1 (en) * 1998-11-06 2001-01-09 Msx, Inc. Remote control for use with a deicing apparatus
US6334735B1 (en) * 1999-02-11 2002-01-01 Blaw Knox Construction Equipment Corporation Controller for a paving screed heating system

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DE2264357C2 (en) * 1972-12-29 1982-07-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Circuit arrangement for the logical combination of AC input signals
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DD135965A1 (en) * 1978-04-24 1979-06-06 Roland Reuther CIRCUIT ARRANGEMENT FOR MONITORING THE EXCESSIVE STATE OF A MULTI-PHASE TRANSFORMER
JPH0458160A (en) * 1990-06-26 1992-02-25 Matsushita Electric Works Ltd Current detecting device
DE4026894C1 (en) * 1990-08-23 1991-11-28 Aeg Westinghouse Transport-Systeme Gmbh, 1000 Berlin, De Heating current monitoring unit for railway air conditioning - has parallel heating circuits, connected directly via entrance to air treatment device
US5280422A (en) * 1990-11-05 1994-01-18 Watlow/Winona, Inc. Method and apparatus for calibrating and controlling multiple heaters
DE9414333U1 (en) * 1994-09-03 1994-11-03 Abb Patent Gmbh, 68309 Mannheim Miniature circuit breakers or residual current circuit breakers
DE19537691C5 (en) * 1994-10-10 2004-11-11 T. F. Trading A/S Multi-channel control system for a road construction machine for heating the sole plates of the screed
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DE19912248A1 (en) * 1999-03-18 2000-09-21 Voegele Ag J Process for heating the screed of a paver, and electrical heating device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716520A (en) * 1986-01-22 1987-12-29 Nordson Corporation Method of checking channel connections and detecting heater circuit and temperature sensor malfunctions in multi-channel closed loop hot melt heating systems
US5256859A (en) * 1991-06-14 1993-10-26 General Binding Corporation Power supply for binding apparatus
US5356238A (en) * 1993-03-10 1994-10-18 Cedarapids, Inc. Paver with material supply and mat grade and slope quality control apparatus and method
US5908459A (en) * 1996-02-17 1999-06-01 Abg Allgemeine Baumaschinen-Gesellschaft Mbh Road finisher having a plurality of control systems with interchangeable control processors
US6172647B1 (en) * 1998-11-06 2001-01-09 Msx, Inc. Remote control for use with a deicing apparatus
US6334735B1 (en) * 1999-02-11 2002-01-01 Blaw Knox Construction Equipment Corporation Controller for a paving screed heating system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080029285A1 (en) * 2006-08-03 2008-02-07 Kelly Michael W Bolt heater
US7705272B2 (en) * 2006-08-03 2010-04-27 Power House Tool, Inc. Bolt heater assembly unit having junction housing configuration
US20110083708A1 (en) * 2009-10-12 2011-04-14 Ultrasonic Power Corporation Ultrasonic Cleaning System with Transducer Failure Indicator
US9475099B2 (en) * 2009-10-12 2016-10-25 Ultrasonic Power Corporation Ultrasonic cleaning system with transducer failure indicator

Also Published As

Publication number Publication date
US7635829B2 (en) 2009-12-22
EP1557492A2 (en) 2005-07-27
DE102004003356B4 (en) 2013-05-23
EP1557492A3 (en) 2007-11-14
EP1557492B1 (en) 2010-12-15
DE502004011995D1 (en) 2011-01-27
DE102004003356A1 (en) 2005-08-18
US20070138164A1 (en) 2007-06-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: JOSEPH VOGELE AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BUSCHMANN, MARTIN;REEL/FRAME:016034/0021

Effective date: 20050322

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION