EP1994381A1 - Dosimetre de vibrations et procede de determination de la charge journaliere en vibrations - Google Patents

Dosimetre de vibrations et procede de determination de la charge journaliere en vibrations

Info

Publication number
EP1994381A1
EP1994381A1 EP07703854A EP07703854A EP1994381A1 EP 1994381 A1 EP1994381 A1 EP 1994381A1 EP 07703854 A EP07703854 A EP 07703854A EP 07703854 A EP07703854 A EP 07703854A EP 1994381 A1 EP1994381 A1 EP 1994381A1
Authority
EP
European Patent Office
Prior art keywords
vibration
working
value
daily
dosimeter
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
EP07703854A
Other languages
German (de)
English (en)
Inventor
Andreas Strasser
Markus Roth
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1994381A1 publication Critical patent/EP1994381A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Definitions

  • the invention relates to a vibration dosimeter and a method for determining the daily vibration load according to the preamble of claims 1 and 11, respectively.
  • the European Parliament and the Council of the European Commission have considered it necessary to introduce measures to protect workers from hazards due to their effects on the health and safety of workers, and therefore in the EU Directive 2002 / 44 sets out minimum requirements that impose specific measures on the employer above a daily trigger level or a daily exposure limit value.
  • the assessment of the extent of exposure may be made, according to the Directive, either by means of an estimate based on the manufacturer's information on the level of vibration caused by the equipment and by observing specific procedures or by measurement.
  • estimates are often very inaccurate and difficult for the workers to understand, while measurements are relatively expensive They require determination of the RMS value of the frequency-weighted acceleration in three orthogonal directions, which is also required for hand-held or guided devices on each hand.
  • a vibration dosimeter is known, which is adapted to the hand of an operator of a working device and with a sensor for measuring the occurring vibration levels to which the operator is exposed, a device for calculating the cumulative exposure, and a Device for transmitting the recorded data to the operator-equipped.
  • DE 101 19 252 A1 discloses a device for the personal measurement of characteristic values of the hand-arm and the whole-body vibration load at workstations (vibration dosemeters) which, in addition to the acquisition of vibration measured values, also permits the detection of other physical measured variables. which are considered relevant for the assessment of the effect of vibrations on the human body.
  • the invention is based on the idea to determine for each tool a manufacturer-specific vibration value and specify for example on the tool itself or in its instruction manual, and from this typical working vibration value and set by the EU Directive 2002/44 trigger value or exposure limit one to calculate the daily working time until this trigger value or exposure limit value is reached, which can then be compared with the actual effective daily operating life of the work equipment to detect any overshoots.
  • the vibration dosimeter according to the invention and the method according to the invention can be used at any workstation where an employee is exposed to hand-arm or whole-body vibration, for example at construction sites where workers often experience different vibrations during the day Work equipment are employed.
  • Another advantage of the vibratory dosimeter according to the invention is that it can be easily and quickly changed when working with different, vibration-generating work tools at each change of a working fluid, with only the typical work vibration value for the new work equipment must be entered into the dosimeter.
  • the typical vibration level is preferably an acceleration value expressed in units of m / s 2 .
  • the vibration dosimeter comprises a display device which indicates the exceeding of the prescribed exposure value or exposure limit value of the vibration load if the determined effective daily operating time of the or each working fluid in the working state is the calculated working time until reaching the prescribed triggering value or exposure limit exceeds the vibration load.
  • the display device could for this purpose comprise a small display, for example an LCD display, but because of the vibration load of the dosimeter itself, a more robust display device is preferred which comprises at least two and preferably three differently colored light-emitting diodes.
  • a green light emitting diode may be used, which indicates by illumination that the determined effective daily operating time is the calculated working time until the prescribed trip value is reached while an orange LED is turned on, if the effective daily operating time determined exceeds the calculated working time until the prescribed action value is reached, but not the calculated working time until reaching the exposure limit.
  • a red LED may be used to indicate that the calculated working time has been exceeded until reaching the exposure limit.
  • the determined effective daily operating time of the or each working fluid is preferably automatically reset to zero.
  • the invention is used in connection with electrically driven work equipment, such as hand-held electric tools, since in the case of electrical appliances, the effective daily operating time can be determined relatively simply via the power consumption of the appliance in the working condition.
  • the vibration dosimeter can be conveniently integrated either in the device itself or in a socket, via which the respective device is connected to a power supply line or a power supply network.
  • the latter variant has the advantage that the same socket used when changing the device and thus the vibration load can be measured by all devices with a single dosimeter.
  • the vibration dosimeter may be configured to be worn by the worker either as a wristwatch or mounted on the respective device.
  • appropriate moderately determined by means of a simple acceleration sensor by a reference measurement of the acceleration level of the device at idle and in the working state and stored in the dosimeter.
  • the dosimeter then records during the entire working day whether the device is in the working, idle or off state and compares the determined effective operating time of the device with the daily working time calculated from the typical vibration value of the device until reaching the triggering value resp the exposure limit.
  • the vibration dosimeter may conveniently have an interface, such as a USB port or memory card, so that the work, idle - or off times of the device can be transmitted to a computer together with the typical work vibration value.
  • FIG. 1 shows a schematic representation of components of a vibratory dosimeter integrated in a hammer drill
  • Fig. 2 is a perspective view of the hammer drill
  • 3 shows a perspective view of a socket with a built-in vibration dosimeter
  • 4 shows a schematic representation of components of the vibration dosimeter installed in the socket
  • FIG. 5 is an enlarged perspective view of a vibration dosimeter for releasable attachment to a working means.
  • Fig. 6 is a schematic representation of components of the vibration dosimeter of Fig. 5;
  • FIG. 7 is a perspective view of the vibration dosimeter of FIG. 5 after attachment to a cordless hammer;
  • Fig. 8 is a perspective view of a wristwatch with an integrated vibration dosimeter
  • FIG. 9 shows a schematic representation of components of the vibration dosimeter from FIG. 8.
  • the drawing shows several installation variants for a vibration dosimeter 2, which is used to determine the daily vibration load of a worker when working with a motor-driven, in the drawing by way of example in the form of a network-dependent rotary hammer 4 (FIG. 2) or a battery-operated hammer 6 (FIG ) shown working equipment is used. Since the use of these power tools 4, 6, in particular in impact drills or hammers, exposes the operator to considerable hand-arm vibration, which, when exposed to prolonged exposure, has an effect on the health of the worker.
  • the employer is obliged to take the measures specified in EU Directive 2002/44 if the worker's vibration exposure in the case of hand-arm vibrations has a daily tripping value of 2.5 m / s 2 or daily exposure limit of 5 m / s 2 .
  • the vibration dosimeter 2 described below makes it possible to easily and inexpensively determine this vibration load or the exceeding of the triggering or exposure limit value.
  • the illustrated in Figures 1 and 2, integrated in the hammer 4, powered by the power cable 8 and a transformer 10 from the network dosimeter 2 includes for this purpose at least one transducer 12 for receiving suitable operating variables of the hammer drill 4, such as the current consumption its electric drive motor 14 and / or its speed, as well as an internal timer 16, from whose measured values can be determined in an evaluation 18 of the dosimeter 2 an effective daily operating time of the device 4, ie the time from commissioning, in which the device 4 is in the working state, with idle or off times are not counted.
  • suitable operating variables of the hammer drill 4 such as the current consumption its electric drive motor 14 and / or its speed, as well as an internal timer 16, from whose measured values can be determined in an evaluation 18 of the dosimeter 2 an effective daily operating time of the device 4, ie the time from commissioning, in which the device 4 is in the working state, with idle or off times are not counted.
  • the dosimeter 2 or the evaluation electronics 18 further comprises a memory 20 in which a device-specific vibration value ascertained by measurements for the hammer drill 4 is stored, which has the unit m / s 2 like the triggering value and the exposure limit value.
  • the evaluation electronics 18 further comprises a processor 22 which, from the daily triggering or exposure limit values set in the EU directive and the device-specific vibration value, a daily working time until the triggering time is exceeded. value or the exposure limit value calculated according to the following relationships:
  • the processor 22 comprises a comparator 24, which compares the calculated daily working time until the trigger value or the exposure limit value is exceeded with the determined effective daily operating time of the device 4 and indicates a possible overshoot of the values on a display 26.
  • the display 26 comprises a green, an orange and a red LED 28, 30, 32, of which the green 28 is illuminated, as long as the calculated daily working time is not exceeded by the operation of the device in the working state until the action value is exceeded.
  • the orange LED 30 lights up as soon as the effective daily operating time of the device 4 exceeds the calculated daily working time until the trip value is exceeded.
  • the red LED 32 is turned on when the exposure limit is exceeded, namely, when the determined effective daily operating time of the device 4 exceeds the calculated daily working time until the exposure limit is exceeded.
  • the transmitter 18 also includes a reset circuit 34, which resets the determined effective daily operating time of the device 4 to zero, when the device 4 is longer than 8 hours in the off state.
  • a reset button (not shown) is provided for manual reset.
  • the measuring transducer 12 measures the current flowing between a mains plug 38 and a socket 40 of the socket 36.
  • an input part 42 is additionally provided, on which the respective device-specific vibration value of the connected device 4, 6 removed, for example, from a user manual can be entered into the dosimeter 2 or changed when changing a device 4, 6 .
  • the transmitter 18 determines the effective daily operating time of each connected device 4, 6 from the previously determined by reference measurements power consumption in the working, idle and possibly standby state to the operating time with the according to the relationships (1). or (2) compare calculated daily working time until the action value or exposure limit is exceeded and indicate overshoots by activating the orange or red LEDs 30, 32 of the display 26 on the front of the socket 36.
  • the dosimeter 2 has an additional interface 44, for example a USB port, with which the effective daily operating time and, if necessary, additional idle and idle times of the connected device 4, 6 for more accurate evaluation by the employer and as Proof of compliance with EU Directive 2002/44, for example, can be transferred to a PC.
  • additional interface 44 for example a USB port
  • the transducer 12 comprises a simple acceleration sensor 48 instead of an ammeter Help can be determined by a reference measurement of the acceleration level of the device 6 in idle and in the working state and stored in the memory 20.
  • the processor 22 determines the effective daily operating time of the device 6 to then compare it to the daily working time to exceed the threshold value or exposure limit as previously determined according to the relationships (FIG. 1) or (2) is calculated from a device-specific vibration value entered at the input part 42 into the dosimeter 2 and the prescribed triggering or exposure limit value.
  • the dosimeter 2 When working with another implement, the dosimeter 2 is removed from the cordless hammer 6 and attached to the other implement. Then the device-typical vibration value of the other implement is input and determined by a reference measurement acceleration level in idle and in the working state and stored in the memory 20, whereupon the transmitter 18 determines the effective operating time of the other device and the previously determined effective operating time of the cordless hammer 6 added. As described above, a Be provided interface 44 for data transfer to a PC.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Radiation (AREA)

Abstract

L'invention concerne un dosimètre de vibrations (2) et un procédé de détermination de la charge journalière en vibrations subie par des personnes exposées sur leur lieu de travail à des vibrations mécaniques suite à l'utilisation d'un moyen de travail et en particulier d'un outil électrique manuel (4, 6). Il est prévu selon l'invention que le dosimètre (2) présente un dispositif (12, 18) qui détermine la durée journalière effective d'utilisation du moyen de travail (4, 6), un dispositif de calcul (22) qui calcule le temps de travail journalier jusqu'à atteindre une valeur prédéterminée de déclenchement ou une valeur limite d'exposition aux sollicitations de vibration sur base d'une valeur de vibration typique du moyen de travail et de la valeur de déclenchement ou de la valeur d'exposition limite, ainsi qu'un dispositif de comparaison (24) qui compare la durée journalière effective d'utilisation ainsi déterminée du moyen de travail au temps de travail journalier calculé jusqu'à atteindre la valeur prescrite.
EP07703854A 2006-03-02 2007-01-15 Dosimetre de vibrations et procede de determination de la charge journaliere en vibrations Ceased EP1994381A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006009657A DE102006009657A1 (de) 2006-03-02 2006-03-02 Vibrationsdosimeter und Verfahren zur Ermittlung der täglichen Vibrationsbelastung
PCT/EP2007/050338 WO2007098980A1 (fr) 2006-03-02 2007-01-15 Dosimetre de vibrations et procede de determination de la charge journaliere en vibrations

Publications (1)

Publication Number Publication Date
EP1994381A1 true EP1994381A1 (fr) 2008-11-26

Family

ID=38329178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07703854A Ceased EP1994381A1 (fr) 2006-03-02 2007-01-15 Dosimetre de vibrations et procede de determination de la charge journaliere en vibrations

Country Status (5)

Country Link
US (1) US7818141B2 (fr)
EP (1) EP1994381A1 (fr)
CN (1) CN101395455A (fr)
DE (1) DE102006009657A1 (fr)
WO (1) WO2007098980A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4491338A1 (fr) 2023-07-11 2025-01-15 Hilti Aktiengesellschaft Machine-outil dotée d'au moins une poignée et procédé de détection d'un motif veineux d'un utilisateur de la machine-outil

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007014893A1 (de) 2007-03-26 2008-10-02 Robert Bosch Gmbh Vibrationsdosimeter zur Ermittlung der Vibrationsbelastung
US20110051558A1 (en) * 2009-08-26 2011-03-03 Caterpillar Inc. System for Determining the Work Time of a Work Tool
WO2014043190A2 (fr) * 2012-09-11 2014-03-20 Black & Decker Inc. Système et procédé pour identifier un outil électrique
DE102013016068A1 (de) * 2013-09-27 2015-04-02 Robert Bosch Gmbh Werkzeug und Verfahren zur Zustandsüberwachung eines Werkzeugs
US20150233757A1 (en) * 2014-02-20 2015-08-20 Milwaukee Electric Tool Corporation Vibration exposure monitoring system
WO2016127936A1 (fr) * 2015-02-10 2016-08-18 苏州宝时得电动工具有限公司 Dispositif portatif et système
GB201515580D0 (en) * 2015-09-03 2015-10-21 Reactec Ltd Vibration Monitor
CN105291756B (zh) * 2015-10-15 2018-04-13 珠海格力电器股份有限公司 车载空调及其控制方法和装置
DE102015226183A1 (de) * 2015-12-21 2017-06-22 Robert Bosch Gmbh Verfahren zu einem Betrieb von zumindest einer Handwerkzeugmaschine
GB2574836A (en) * 2018-06-19 2019-12-25 James Jones Michael Vibration monitoring apparatus
EP3948702A4 (fr) 2019-03-29 2023-07-26 Saint-Gobain Abrasives, Inc. Solutions de meulage de performance
WO2020206382A1 (fr) 2019-04-03 2020-10-08 Saint-Gobain Abrasives, Inc. Article abrasif, système abrasif et procédé d'utilisation et de formation de celui-ci
GB2583733A (en) * 2019-05-07 2020-11-11 Mafic Ltd User activity determining system
CN113759411A (zh) * 2021-09-07 2021-12-07 中金辐照重庆有限公司 一种γ辐照装置总体平均吸收剂量的计算方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920480A (en) * 1956-01-18 1960-01-12 Haas Tibor Methods for indicating the expiration of the assigned or safe life of structural members
US3237448A (en) * 1960-06-16 1966-03-01 Howell Instruments Equivalent operating time apparatus
GB1104141A (en) * 1964-04-24 1968-02-21 Smiths Industries Ltd Improvements in or relating to electrical apparatus for providing a representation of engine-life
US3517177A (en) * 1967-12-15 1970-06-23 Honeywell Inc Equivalent base load hours computer
GB2299168A (en) * 1995-03-22 1996-09-25 British Gas Plc Vibration monitor
AU717448B2 (en) * 1995-03-22 2000-03-23 Lattice Intellectual Property Limited Vibration dosimeter worn by an operator
US6006164A (en) 1997-07-22 1999-12-21 Skf Condition Monitoring, Inc. Portable vibration monitor
DE10119252A1 (de) 2001-04-11 2002-11-21 Klaus-Thomas Schenk Einrichtung zur personengebundenen Messung von Kennwerten der Hand- Arm- und Ganzkörperschwingungsbelastung an Arbeitsplätzen (Schwingungsdosimeter)
US6550260B1 (en) 2001-09-28 2003-04-22 Carrier Corporation Vibration detection in a transport refrigeration system through current sensing
GB2413189B (en) 2004-04-16 2008-09-10 Mecon Ltd Vibration dosage meter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007098980A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4491338A1 (fr) 2023-07-11 2025-01-15 Hilti Aktiengesellschaft Machine-outil dotée d'au moins une poignée et procédé de détection d'un motif veineux d'un utilisateur de la machine-outil
WO2025011982A1 (fr) 2023-07-11 2025-01-16 Hilti Aktiengesellschaft Outil électrique doté d'au moins un manche et procédé de détection d'un motif de veine d'une personne utilisant l'outil électrique

Also Published As

Publication number Publication date
DE102006009657A1 (de) 2007-09-06
WO2007098980A1 (fr) 2007-09-07
CN101395455A (zh) 2009-03-25
US20090140154A1 (en) 2009-06-04
US7818141B2 (en) 2010-10-19

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