EP0344443A2 - Centrifugeuse - Google Patents

Centrifugeuse Download PDF

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Publication number
EP0344443A2
EP0344443A2 EP89107005A EP89107005A EP0344443A2 EP 0344443 A2 EP0344443 A2 EP 0344443A2 EP 89107005 A EP89107005 A EP 89107005A EP 89107005 A EP89107005 A EP 89107005A EP 0344443 A2 EP0344443 A2 EP 0344443A2
Authority
EP
European Patent Office
Prior art keywords
markings
rotor
centrifuge according
speed
code
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
EP89107005A
Other languages
German (de)
English (en)
Other versions
EP0344443A3 (fr
Inventor
Harald Hermle
Hans Christoph Ulber
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.)
Maschinenfabrik Berthold Hermle AG
Original Assignee
Maschinenfabrik Berthold Hermle 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 Maschinenfabrik Berthold Hermle AG filed Critical Maschinenfabrik Berthold Hermle AG
Publication of EP0344443A2 publication Critical patent/EP0344443A2/fr
Publication of EP0344443A3 publication Critical patent/EP0344443A3/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
    • B04B13/003—Rotor identification systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/10—Control of the drive; Speed regulating

Definitions

  • the invention relates to a centrifuge with a rotor driven by an electric drive motor, with markings arranged equidistantly on the rotor and used to detect the actual speed, which are scanned by a sensor fixed to the housing, and with a control device containing a control device for regulating the speed of the drive motor .
  • a centrifuge with such a device for detecting the actual speed via scannable speed markings is known from DE-OS 33 43 516.
  • a limit speed is specified in that the speed markings are arranged in a certain number so that a certain measured frequency always specifies the permissible maximum speed at the same time. If the maximum permissible speed is to be lower, the number of speed markings must be increased.
  • the advantage of the arrangement according to the invention is that the detection of the rotor-specific data takes place with the same sensor, but independently of the detection of the actual speed, so that the speed markings on all rotors can be arranged at the same distance.
  • the additional code markings can be used to easily obtain a large amount of further information about the rotor, which is important for the operation of the rotor, not least for safety reasons are important and can have an automatic influence on the operational process. This enables a safe rotor change even with different rotors
  • the markings are expediently designed as optically or magnetically scannable markings, preferably as line markings in the manner of a bar code. So that the sensor can distinguish the speed markings from the code markings and accordingly generate different signals, the code markings differ from the speed markings by a different design, in particular by different size, width, magnetization, reflectivity, height and / or depth This leads to different light reflections or different, inductively generated pulses according to the sensor principle used.
  • the markings can be provided either as a circular arrangement on the bottom or top of the rotor or as a band-shaped arrangement on the circumference of the rotor.
  • the code markings are expediently arranged between the speed markings, with in particular an arrangement of code markings between two speed markings each containing specific information.
  • the following rotor-specific data are contained individually or together, preferably in the code markings: the effective radius of the rotor, the rotor type, the serial number and the date of manufacture of the rotor.
  • the data on the rotor type can contain permissible operating limit values, in particular the permissible maximum speed and / or a rotor-specific compensation curve for the temperature control.
  • This data can be contained in the code marking itself, or it only contains the rotor type in the form of a number, in which case the assigned data can be stored in the control unit and called up via the rotor type number.
  • the effective radius is required, for example, to set the assigned speed in order to specify a specific centrifugal acceleration.
  • a warning device and / or a shutdown device for the drive motor is preferably triggered in order to make it clear to the operator that operation with the entered data from security is not possible.
  • a computing unit can also be provided in the control unit, by means of which the permissible operating limit values, which have likewise been read out, can be changed after a predetermined period of time has elapsed from the read production date. For example, after the expiry of the guarantee period, which is also included in the code markings, the permissible maximum speed can be reduced, since changes in material and changes in strength must be expected with increasing aging.
  • a second sensor that scans the same markings and a comparison device for the data recorded by the sensors can be provided in the control unit, with a warning device and / or a shutdown device if discrepancies occur can be triggered for the drive motor. It is assumed here that the recorded data or signals in both sensors must be the same if there is a trouble-free and proper function.
  • an area of the code markings can also be designed as a test area for checking the correct data acquisition, wherein if the detection is incorrect, appropriate devices can be triggered.
  • This test area must generate a signal sequence which is compared with a standard signal sequence stored in the control unit.
  • an area of the code markings assigned to an item of information can also be arranged several times in an identical manner as a security device, and again appropriate security devices can be triggered when discrepancies occur.
  • FIG. 1 shows only the lower region of a rotor 10 of a centrifuge, the rotor 10 being rotatably arranged in a rotor space 11, which is also only shown in part.
  • the rotor 10 is driven by a drive which is only shown schematically motor 12 driven.
  • the rotor 10 serves in a known manner to hold substances in which solids are separated by centrifugation and miscible, also emulsified liquids are separated from one another. It is often important to maintain a specific speed and also a specific temperature, which is set by cooling or heating the walls of the rotor chamber 11.
  • markings designed as bar markings in the manner of a bar code are attached to the underside of the rotor 10, as are shown in more detail in FIG. 2. They consist of five broader, equidistantly arranged speed markings 14, between each of which different, thinner code markings 15 are arranged. These markings 13 are scanned by a sensor 16, which can be designed as an optical or inductive sensor. In the case of an embodiment as an optical sensor, the markings are designed as more or less reflective strips and in the case of an inductive sensor as magnetized or non-magnetized ferromagnetic strips. For example, the ring-shaped arrangement can also be magnetized in strips.
  • the signals generated in the sensor 16 are fed to a control unit 17, which has a screen 18 and a keyboard 19 is provided.
  • the processing of the sensor signals and the generation of the control signals required for the centrifuge are preferably carried out by a microcomputer in the control unit 17. To simplify the illustration, only a control line connecting the control unit 17 to the drive motor 12 is shown, for speed control of this drive motor according to predeterminable speed / time Functions.
  • the stronger or wider speed signals are separated from the other code signals, the speed signals are fed to a control device for the speed of the drive motor and the code signals are fed to an evaluation device which is implemented by the microcomputer.
  • the rotor-specific data contained in the code markings are used to identify the rotor used and used, which can be replaced in the usual way by other rotors, depending on the desired application.
  • Each arrangement of code markings 15 between two speed markings 14 can contain information. This can be the effective radius of the rotor, the rotor type, the serial number of the rotor, the date of manufacture, a rotor-specific compensation curve and / or permissible operating limit values such as the permissible maximum speed.
  • the remaining data can also be contained in a serial number, which is then evaluated in the control unit 17 by the other data corresponding to this serial number are stored there.
  • the data that is automatically recorded for example when the engine is started, is checked for conformity with the specified operating sequence and, for example, an error signal or a shutdown is brought about if an operating limit value, for example the permissible maximum speed, is to be exceeded by the specified operating sequence.
  • the automatically detected effective radius of the rotor can be used, for example, to determine and display the effective centrifugal power of the rotor during a run. This radius is also required to determine the speed if a given function for the relative centrifugal acceleration is given. Without the automatic detection of the radius, this would have to be entered manually, the complicated values first having to be selected.
  • the permissible maximum speed can be automatically reduced to prevent material fatigue.
  • the microcomputer also takes over one Security check of the recorded data in order to prevent it from being falsified by dirt or damage to the sensor 16 or the markings 13.
  • either two identical sensors for example offset by 180 ° to one another, can be provided, which would also have to generate identical signal sequences.
  • These signal sequences are compared with one another in the microcomputer, and in the event of a deviation, an error signal is generated, a warning device is triggered or the drive motor is switched off.
  • a region of the code markings can also be designed as a test region for checking the correct data acquisition. The comparison then takes place between the recorded test signal sequence and a comparison signal sequence stored in the microcomputer or its memory.
  • a rotor-specific compensation curve for the temperature control can additionally be contained in a code marking 15.
  • a temperature control the walls of the rotor space 11 are in the usual way cooled and the temperature in the rotor space measured. This is an indirect temperature determination since the temperature of the rotor or the substance to be centrifuged is actually to be measured.
  • Such a compensation curve can be generated via laboratory measurements, which shows the difference between the actually measured temperature in the rotor space and the desired temperature of the rotor or the substance. This can be done depending on the temperature and speed.
  • the compensation curve itself can be contained in the code marking, or a serial or code number contained therein enables the microcomputer to determine a correspondingly stored compensation curve.
  • band-shaped markings 20 according to FIG. 3 can also be provided, which are attached to the rotor 10 on the circumferential side.

Landscapes

  • Centrifugal Separators (AREA)
EP19890107005 1988-06-01 1989-04-19 Centrifugeuse Ceased EP0344443A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818594 1988-06-01
DE19883818594 DE3818594A1 (de) 1988-06-01 1988-06-01 Zentrifuge

Publications (2)

Publication Number Publication Date
EP0344443A2 true EP0344443A2 (fr) 1989-12-06
EP0344443A3 EP0344443A3 (fr) 1990-11-07

Family

ID=6355579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890107005 Ceased EP0344443A3 (fr) 1988-06-01 1989-04-19 Centrifugeuse

Country Status (2)

Country Link
EP (1) EP0344443A3 (fr)
DE (1) DE3818594A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0431645A2 (fr) * 1989-12-08 1991-06-12 Hitachi Koki Co., Ltd. Système pour la gestion de rotors centrifuges
DE4037458A1 (de) * 1990-11-24 1992-05-27 Heraeus Sepatech Zentrifuge und verfahren zum betreiben der zentrifuge
EP0494421A1 (fr) * 1991-01-07 1992-07-15 Beckman Instruments, Inc. Tachymètre et système d'identification de rotor pour centrifugeuses
EP0602587A1 (fr) * 1992-12-14 1994-06-22 E.I. Du Pont De Nemours And Company Système d'identification rotor centrifuge et de contrôle d'instrument
EP0687913A2 (fr) * 1994-06-13 1995-12-20 Prüftechnik Dieter Busch Ag Instrument de mesure avec dispositif de balayage de lumière intégré
EP0824969A2 (fr) * 1996-08-16 1998-02-25 SIGMA LABORZENTRIFUGEN GmbH Système de commande pour centrifugeuse pour laboratoire
DE19723984C2 (de) * 1997-06-06 2000-02-17 Kendro Lab Prod Gmbh Auswechselbarer Zentrifugen-Rotor mit wenigstens einem Magnetkörper als Informationsträger sowie ein Verfahren zum Einbringen eines Magnetkörpers
GB2353886A (en) * 1999-12-08 2001-03-07 Seward Ltd Medical and/or laboratory equipment
WO2018215398A1 (fr) * 2017-05-24 2018-11-29 Hengst Se Procédé pour faire fonctionner un séparateur centrifuge
CN109791735A (zh) * 2016-09-27 2019-05-21 本田技研工业株式会社 车辆控制装置
CN109854335A (zh) * 2019-03-26 2019-06-07 广西华原过滤系统股份有限公司 一种具有转速监测功能的新型机油转子滤清器及方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208059A1 (de) * 1992-03-13 1993-09-16 Hermle Berthold Maschf Ag Zentrifuge
DE4419485C2 (de) * 1994-06-03 1997-02-13 Sigma Laborzentrifugen Gmbh Rotor für eine Laborzentrifuge
DE10016876A1 (de) * 2000-04-05 2001-10-18 Mann & Hummel Filter Freistrahlzentrifuge mit Überwachungsmittel und Verfahren zu deren Überwachung
DE102004002110A1 (de) * 2004-01-14 2005-08-11 Hermle Labortechnik Gmbh Zentrifuge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462670A (en) * 1966-06-06 1969-08-19 Int Equipment Co Centrifuge and means to prevent overdriving its rotor
US3746247A (en) * 1970-12-23 1973-07-17 Electro Nucleonics Ultracentrifuge with rotor speed identification
US4205261A (en) * 1978-07-13 1980-05-27 Beckman Instruments, Inc. Ultracentrifuge overspeed disk detection system
WO1987003677A1 (fr) * 1985-12-05 1987-06-18 Baxter Travenol Laboratories, Inc. Procede et appareil de collecte de donnees optiques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462670A (en) * 1966-06-06 1969-08-19 Int Equipment Co Centrifuge and means to prevent overdriving its rotor
US3746247A (en) * 1970-12-23 1973-07-17 Electro Nucleonics Ultracentrifuge with rotor speed identification
US4205261A (en) * 1978-07-13 1980-05-27 Beckman Instruments, Inc. Ultracentrifuge overspeed disk detection system
WO1987003677A1 (fr) * 1985-12-05 1987-06-18 Baxter Travenol Laboratories, Inc. Procede et appareil de collecte de donnees optiques

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0431645A3 (en) * 1989-12-08 1992-03-04 Hitachi Koki Co., Ltd. System for management of body of rotation of centrifuge
US5342280A (en) * 1989-12-08 1994-08-30 Hitachi Koki Company Limited System for management of body rotation of centrifuge
EP0431645A2 (fr) * 1989-12-08 1991-06-12 Hitachi Koki Co., Ltd. Système pour la gestion de rotors centrifuges
DE4037458A1 (de) * 1990-11-24 1992-05-27 Heraeus Sepatech Zentrifuge und verfahren zum betreiben der zentrifuge
EP0494421A1 (fr) * 1991-01-07 1992-07-15 Beckman Instruments, Inc. Tachymètre et système d'identification de rotor pour centrifugeuses
US5221250A (en) * 1991-01-07 1993-06-22 Beckman Instruments, Inc. Coding of maximum operating speed on centrifuge rotors and detection thereof
US5383838A (en) * 1991-01-07 1995-01-24 Beckman Instruments, Inc. Tachometer and rotor identification system for centrifuges
EP0602587A1 (fr) * 1992-12-14 1994-06-22 E.I. Du Pont De Nemours And Company Système d'identification rotor centrifuge et de contrôle d'instrument
DE4420562C2 (de) * 1994-06-13 1999-11-18 Busch Dieter & Co Prueftech Drehzahlmeßgerät
EP0687913A2 (fr) * 1994-06-13 1995-12-20 Prüftechnik Dieter Busch Ag Instrument de mesure avec dispositif de balayage de lumière intégré
EP0687913A3 (fr) * 1994-06-13 1997-04-09 Busch Dieter & Co Prueftech Instrument de mesure avec dispositif de balayage de lumière intégré
EP0824969A2 (fr) * 1996-08-16 1998-02-25 SIGMA LABORZENTRIFUGEN GmbH Système de commande pour centrifugeuse pour laboratoire
EP0824969A3 (fr) * 1996-08-16 1999-02-03 SIGMA LABORZENTRIFUGEN GmbH Système de commande pour centrifugeuse pour laboratoire
DE19723984C2 (de) * 1997-06-06 2000-02-17 Kendro Lab Prod Gmbh Auswechselbarer Zentrifugen-Rotor mit wenigstens einem Magnetkörper als Informationsträger sowie ein Verfahren zum Einbringen eines Magnetkörpers
GB2353886A (en) * 1999-12-08 2001-03-07 Seward Ltd Medical and/or laboratory equipment
GB2353886B (en) * 1999-12-08 2004-06-02 Seward Ltd Medical and/or laboratory equipment
CN109791735A (zh) * 2016-09-27 2019-05-21 本田技研工业株式会社 车辆控制装置
WO2018215398A1 (fr) * 2017-05-24 2018-11-29 Hengst Se Procédé pour faire fonctionner un séparateur centrifuge
US11440027B2 (en) 2017-05-24 2022-09-13 Hengst Se Method for operating a centrifugal separator
CN109854335A (zh) * 2019-03-26 2019-06-07 广西华原过滤系统股份有限公司 一种具有转速监测功能的新型机油转子滤清器及方法

Also Published As

Publication number Publication date
DE3818594A1 (de) 1989-12-07
EP0344443A3 (fr) 1990-11-07

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