EP2171415A2 - Ressort pneumatique muni de moyens de mesure, dispositif et procédé de surveillance d'au moins une grandeur de mesure physique observée à l'intérieur d'un ressort pneumatique et/ou sur un ressort pneumatique - Google Patents

Ressort pneumatique muni de moyens de mesure, dispositif et procédé de surveillance d'au moins une grandeur de mesure physique observée à l'intérieur d'un ressort pneumatique et/ou sur un ressort pneumatique

Info

Publication number
EP2171415A2
EP2171415A2 EP08758132A EP08758132A EP2171415A2 EP 2171415 A2 EP2171415 A2 EP 2171415A2 EP 08758132 A EP08758132 A EP 08758132A EP 08758132 A EP08758132 A EP 08758132A EP 2171415 A2 EP2171415 A2 EP 2171415A2
Authority
EP
European Patent Office
Prior art keywords
evaluation unit
data
gas
measuring means
gas 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.)
Withdrawn
Application number
EP08758132A
Other languages
German (de)
English (en)
Inventor
Norbert Reinmuth
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.)
Fibro GmbH
Original Assignee
Fibro 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 Fibro GmbH filed Critical Fibro GmbH
Publication of EP2171415A2 publication Critical patent/EP2171415A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3292—Sensor arrangements

Definitions

  • the invention relates to a gas spring, in particular for receiving strokes in a tool or in a machine. Furthermore, the invention relates to a device and a method for monitoring at least one occurring within and / or on a gas spring physical quantity.
  • Gas springs are pneumatic springs that use a pressurized gas to provide a spring force.
  • the gas spring acts as a hydro-pneumatic adjusting element.
  • Gas springs generally consist of a pressure tube, a piston rod and a piston.
  • the gas spring is filled with a compressed gas.
  • the gas exerts on the piston a force which is used as restoring force of the gas spring.
  • the restoring force can be precisely determined by the choice of a suitable gas or gas mixture and the setting of a certain filling pressure.
  • the piston has at least one small opening through which the compressed gas can flow to the other side of the piston. This results in not only a restoring force, but also a particularly advantageous damping effect of the gas spring.
  • Such gas springs are found, for example, in office chairs or as holding devices of trunk lids in motor vehicles.
  • gas springs of the type mentioned are used to provide in tools or machines both a restoring force and a certain damping effect. These may in particular be machines that perform a repetitive stroke movement. Such a lifting movement is characterized by a recurring reciprocating motion of a movable component, wherein the position of the two dead centers of the lifting movement generally does not change. In such use in tools or machines, however, it may be due to external and / or internal influences to change the suspension and / or damping characteristics of a gas spring come. As the temperature of the spring increases, the internal pressure of the trapped gas increases simultaneously. This changes the suspension characteristics. In addition, the viscosity of the trapped fluid changes as a result of mechanical stress as well as due to the influence of temperature, as a result of which a change in the damping characteristic mainly occurs.
  • the present invention is therefore based on the object to provide a traceability and predictability of the use behavior of gas springs depending on the particular conditions of use.
  • a gas spring of the type mentioned is further developed and designed such that one or more measuring means are provided for monitoring at least one occurring within and / or on the gas spring physical quantity.
  • a suitable gas spring can be selectively selected for the particular intended purpose.
  • the gas spring according to the invention has a pressure sensor or a combined pressure / temperature sensor.
  • the gas spring may also have a plurality of pressure sensors and / or a plurality of pressure / temperature sensors. These can be distributed over the length of the gas spring, for example. Furthermore, it is conceivable to provide a pressure sensor on each side of the piston. These pressure sensors measure the internal pressure of the gas spring, namely the pressure of the compressed fluid within the cylinder.
  • the gas pressure spring also has one or more temperature sensors.
  • Such temperature sensors can detect both the temperature of the surface of the gas spring and the temperature of the compressed gas within the spring. the lose weight. This makes it possible to determine a correlation between the internal and external temperature of the gas spring in a particularly advantageous manner.
  • the measuring means of the gas spring on a network-independent power supply.
  • the power supply can be accomplished by batteries, accumulators or possibly also inductively.
  • the measuring means of the gas spring on a memory for measurement data.
  • an evaluation or display unit for the measurement data can be dispensed with. Stored measured values can be interrogated and displayed periodically or continuously.
  • such a device for monitoring at least one occurring within and / or on a gas spring physical quantity, the above object is achieved with the features of claim 6. Thereafter, such a device according to the invention comprises:
  • one or more gas pressure springs according to the invention, one or more evaluation units, and one or more data transmission means for transmitting data between the measuring means and the evaluation unit.
  • the device allows the monitoring of one or more physical measured variables occurring within and / or on one or more gas pressure springs.
  • a gas pressure spring according to the invention is initially provided, which has at least one measuring means.
  • the measured data are forwarded with one or more data transmission means to one or more evaluation units.
  • the display and further processing of the data can be made directly in the evaluation unit or in other optional devices.
  • the device according to the invention a complete monitoring of the operational behavior of gas springs is realized.
  • the measured values obtained can be used to enable a traceability and predictability of the operational behavior of the gas spring as a function of the respective operating conditions.
  • the evaluation unit preferably has a microcontroller. As a result, a small size, low energy consumption and a low-cost provision of the evaluation is possible.
  • the data transmission means between the gas spring and the evaluation unit can have one or more conductors, in particular cables, and / or one or more coupled conductor tracks (bus).
  • the individual linkage of each individual measuring device (sensor) with the evaluation unit represents the cheapest option, but goes hand in hand with a high amount of wiring.
  • the plurality of cables require corresponding space within the device. Therefore, in limited space and a corresponding number of measuring means (sensors), the use of coupled tracks, i. from bus systems.
  • Such a bus system can operate according to the CANopen protocol and / or the PROFI BUS protocol. In principle, however, the use of other known communication protocols is conceivable.
  • a development is proposed in which a CAN data logger is provided, with which measurement data can be stored.
  • This CAN data logger can store measured data, for example, on a memory card.
  • the CAN data logger can be configured so that it merely passes on error states to an optionally available programmable logic controller (PLC). On the basis of the recorded measured value history, it is thus also possible to ascertain certain tendencies.
  • PLC programmable logic controller
  • data can be transmitted by radio waves to the data transmission means.
  • data transmission means are provided which forward the measured value data from the measuring means of the gas pressure springs to the evaluation unit by radio.
  • data transmission means may be provided alternatively or in addition to the aforementioned wireline data transmission means. If only data transmission means operating by radio are provided, the wiring effort is eliminated. In addition, the space required within the facility decreases.
  • the gas pressure springs can be used hermetically shielded, but measured value signals can be transmitted by radio to the evaluation unit.
  • Bluetooth is an industry standard for wireless radio networking of devices over short distances. This provides a wireless interface, via which mobile devices in particular can communicate with each other. This cable connections between the devices are replaced. Bluetooth devices generally transmit in the license-free ISM band (Industrial, Scientific and Medical Band) and may be operated worldwide without authorization.
  • the evaluation unit has a memory for measurement data.
  • This memory can be realized additionally or alternatively to a corresponding memory in the measuring means of a gas pressure spring according to the invention.
  • the evaluation unit has a programmable logic controller (PLC).
  • PLC programmable logic controller
  • the PLC can first evaluate the transmitted measured value data. If deviations from a specified target value are detected, the PLC can act directly on the machine or tool that contains the monitored gas springs. For example, the stroke or the frequency of the machine can be precisely monitored and adjusted. Since a feedback of measured value data influences a manipulated variable, there is a control behavior of the PLC. Alternatively, the PLC can also provide simple control perform tasks of the machine or the tool, without the feedback of measured value sizes taking place.
  • the programmable logic controller may be formed integrally with the evaluation unit or separately from the evaluation unit.
  • the programmable logic controller forms a separate component of the device according to the invention, it is preferred that between the evaluation unit and the programmable logic controller (PLC) for data exchange one or more of the bus systems AS-Interface bus, PROFIBUS, PROFINET, Interbus, Interbus Safety, CAN and CANopen is set up.
  • the mentioned bus systems allow a fast and large-volume data exchange, without incurring an increased cabling effort.
  • the device In general, a development of the device is particularly favored, in which several gas springs are connected on the pressure side. In this case, the common pressure value of several gas springs can be determined with only one sensor (measuring means). Thus, both the investment and the wiring and the associated space requirements are reduced.
  • a method according to the invention comprises the following steps:
  • a method is provided with which traceability and predictability of the operational behavior of gas springs as a function of the respective conditions of use is realized. To avoid repetition, reference is made in relation to the advantages of the method according to the invention and the preferred embodiments of the method according to the invention to the comments on the gas spring according to the invention and to the device according to the invention.
  • one or more values of the pressure and / or the temperature can be recorded.
  • the measured value data can be stored in the measuring device and / or in the evaluation unit.
  • the measured value data is transmitted from the measuring device to the evaluation unit with one or more conductors, in particular cables, and / or with one or more coupled conductor tracks (bus).
  • the Profibus and / or the CANopen protocol can be used, with measurement data being optionally stored in a CAN data logger.
  • measured value data are transmitted from the measuring means to the evaluation unit by radio, in particular with short-range GHz radio waves, in particular with radio waves in the ISM band between 2.402 GHz and 2.480 GHz, and in particular according to the Bluetooth standard.
  • PLC programmable logic controller
  • the programmable logic controller PLC
  • one or more of the AS-Interface bus, POFIBUS, PROFINET, Interbus, Interbus-Safety, CAN and CANopen protocols are preferably used for data exchange between these devices.
  • the number of strokes completed by the change of the measured pressure within one or more gas pressure springs is detected and stored, in particular by the evaluation unit. This is made possible by the inventive method, in a particularly simple and tamper-proof manner to determine the number of total strokes performed a machine or a tool and hold. This is particularly interesting for leasing or rental machines.
  • the length of the lifting movement and the frequency of a machine or a tool can be determined via the measured value data of the gas pressure springs used.
  • the method can therefore be used particularly advantageously for error detection, analysis and correction.
  • FIG. 1 is a schematically illustrated circuit diagram of a first embodiment of the device according to the invention, in which a plurality of gas springs are connected to an evaluation unit formed as a programmable logic controller (PLC), wherein the PLC has a CAN interface,
  • PLC programmable logic controller
  • Fig. 2 shows a second embodiment of the device according to the invention, in which a CAN data logger is provided
  • Fig. 3 is a circuit diagram of a third, particularly preferred embodiment of the device according to the invention, are transmitted in the measured value data by radio.
  • Fig. 1 shows a schematically illustrated circuit diagram of a first preferred embodiment of the device according to the invention.
  • a plurality of gas pressure springs 1 are arranged in a machine to accommodate strokes and cushion these and / or dampen.
  • Each gas spring 1 is equipped with at least one measuring means for monitoring at least one occurring in or on the gas spring 1 physical quantity. These measuring devices are not shown here in detail.
  • each gas spring 1 has at least one pressure or temperature sensor or a combined pressure / temperature sensor.
  • a gas pressure spring 1 can also have a plurality of pressure sensors distributed over the length, for example for measuring the pressure of a compressed gas in front of and behind the piston.
  • a plurality of temperature sensors may be provided, for example within the gas spring for measuring the temperature of the gas and on the surface of the gas spring.
  • the pressure medium is nitrogen in the present case.
  • an evaluation unit 2 is provided outside the area in which the gas pressure springs 1 are arranged.
  • the evaluation unit 2 is designed as a programmable logic controller (PLC) 3.
  • data transmission means 4 are provided for transmitting the measured value data of the individual measuring means to the evaluation unit 2. These data transmission means 4 are formed in the present example as a bus 5 and in particular as a CAN bus. For processing the measurement data, the evaluation unit 2 accordingly has a CAN interface 6.
  • Fig. 2 shows a circuit diagram of a second embodiment of the device according to the invention, which is based on the embodiment of Fig. 1.
  • a CAN data logger 7 located in the bus 5 between the gas springs 1 and the programmable logic controller (PLC) 3, a CAN data logger 7. Consequently, in this embodiment, the CAN data logger 7 acts as evaluation 2.
  • the CAN data logger 7 is configured to Saves measurement data to an SD memory card and only passes error information to the PLC 3. As a result, an independent monitoring is realized. Furthermore, it is possible with the recorded measured value history to determine and reproduce measured value tendencies.
  • the CAN data logger 7 is supplied with electrical energy by a voltage source 8.
  • the data transmission means are designed such that measured value data can be transmitted from the gas pressure springs 1 to the evaluation unit 2 by radio waves 9.
  • the radio waves 9 are indicated in this illustration, but details of the data transmission means arranged in the region of the measuring means of the gas pressure springs 1 are not to be seen here.
  • the data transmission means communicate with an evaluation unit 2, which is embodied here as a radio receiver 10.
  • the evaluation unit 2 has an integrated microcontroller. Between the gas pressure springs 1 and the radio receiver 10, measured value data in the short-range GHz radio wave range, preferably according to the Bluetooth standard, transmitted.
  • the evaluation unit 2 further has a memory for measurement data. It is powered by a voltage source 8 with electrical energy.
  • a PLC 3 is also provided here. With the SPS 3 various control tasks can be met, in particular concerning the device in which the gas springs 1 are arranged. If the gas springs 1 are also adjustable with respect to their suspension / damping behavior, the PLC 3 can also act in a corresponding manner.
  • a bus 5 is provided for communication between the evaluation unit 2 and the PLC 3. Again, it may be a CAN, a CANopen bus or any other known protocol.
  • the measuring means of the gas pressure springs 1 have a network-independent power supply. This achieves the greatest possible independence.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un ressort pneumatique (1), destiné en particulier à accueillir des mouvements de course dans un outil ou dans une machine. Pour permettre de comprendre et de prédire l'allure de fonctionnement en fonction des conditions de fonctionnement à un moment donné, ledit ressort pneumatique (1) est réalisé et amélioré de telle sorte qu'un ou plusieurs moyens de mesure sont prévus pour surveiller au moins une grandeur physique observée à l'intérieur du ressort pneumatique et/ou sur le ressort pneumatique. L'invention propose en outre un dispositif et un procédé de surveillance d'au moins une grandeur de mesure physique observée à l'intérieur d'un ressort pneumatique (1) et/ou sur un ressort pneumatique (1).
EP08758132A 2007-07-20 2008-05-30 Ressort pneumatique muni de moyens de mesure, dispositif et procédé de surveillance d'au moins une grandeur de mesure physique observée à l'intérieur d'un ressort pneumatique et/ou sur un ressort pneumatique Withdrawn EP2171415A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007034416A DE102007034416A1 (de) 2007-07-20 2007-07-20 Gasdruckfeder mit Messmittel sowie Einrichtung und Verfahren zur Überwachung zumindest einer innerhalb und/oder an einer Gasdruckfeder auftretenden physikalischen Messgröße
PCT/DE2008/000892 WO2009012737A2 (fr) 2007-07-20 2008-05-30 Ressort pneumatique muni de moyens de mesure, dispositif et procédé de surveillance d'au moins une grandeur de mesure physique observée à l'intérieur d'un ressort pneumatique et/ou sur un ressort pneumatique

Publications (1)

Publication Number Publication Date
EP2171415A2 true EP2171415A2 (fr) 2010-04-07

Family

ID=40149106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08758132A Withdrawn EP2171415A2 (fr) 2007-07-20 2008-05-30 Ressort pneumatique muni de moyens de mesure, dispositif et procédé de surveillance d'au moins une grandeur de mesure physique observée à l'intérieur d'un ressort pneumatique et/ou sur un ressort pneumatique

Country Status (4)

Country Link
US (1) US20100138172A1 (fr)
EP (1) EP2171415A2 (fr)
DE (1) DE102007034416A1 (fr)
WO (1) WO2009012737A2 (fr)

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DE102009042196A1 (de) 2009-09-18 2011-04-14 Bayerische Motoren Werke Aktiengesellschaft Gasfeder mit einer Drucküberwachungseinrichtung
DE102011054838B3 (de) * 2011-10-26 2013-04-25 Ebro Electronic Gmbh Datenlogger mit Mehrklassenschnittstelle
DE202014101509U1 (de) 2014-03-31 2015-07-06 Steinel Normalien Ag Gasdruckfeder
DE102014104479A1 (de) 2014-03-31 2015-10-15 Steinel Normalien Ag Gasdruckfeder
DE102014104481A1 (de) 2014-03-31 2015-10-01 Steinel Normalien Ag Gasdruckfeder
DE102014104482A1 (de) 2014-03-31 2015-10-01 Steinel Normalien Ag Gasdruckfeder
DE202014101508U1 (de) 2014-03-31 2015-07-06 Steinel Normalien Ag Gasdruckfeder
DE202014101507U1 (de) 2014-03-31 2015-07-06 Steinel Normalien Ag Gasdruckfeder
DE202014105904U1 (de) * 2014-09-30 2015-02-02 Fibro Gmbh Vorrichtung zur serienmäßigen Bearbeitung und/oder Herstellung eines Werkstückes
DE202017006714U1 (de) * 2017-12-21 2018-02-19 Fibro Gmbh Vorrichtung zur Überwachung eines Keiltriebwerkzeugs
DE102018110084A1 (de) * 2018-04-26 2019-10-31 Fibro Gmbh Diagnoseeinheit
DE102018110073B3 (de) * 2018-04-26 2019-05-09 Fibro Gmbh Überwachungssensor mit Sicherheitsfunktion zum Evakuieren der Gasdruckfeder per Funk
CN111024330A (zh) * 2019-12-30 2020-04-17 深圳市伸展精密科技有限公司 一种测试氮气弹簧漏气的方法
CN112002116A (zh) * 2020-08-15 2020-11-27 鞍山骏龙自动化控制系统有限公司 一种煤气柜的网络远程监测系统
CN114143362B (zh) * 2021-11-17 2024-07-12 邵阳兴达精密机械制造有限公司 一种基于物联网的氮气弹簧智能监测系统及运行方法

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Also Published As

Publication number Publication date
DE102007034416A1 (de) 2009-01-22
WO2009012737A3 (fr) 2009-06-11
US20100138172A1 (en) 2010-06-03
WO2009012737A2 (fr) 2009-01-29

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