Apparatus and method for controlling centrifugal separator and centrifugation simulation method and centrifugal separator

• US 5,675,519 A
• Filed: 08/26/1994
• Issued: 10/07/1997
• Est. Priority Date: 08/27/1993
• Status: Expired due to Term

• Current Assignee: Hitachi KOKI Company Limited (Koki Holdings Co., Ltd.)
• Original Assignee: Hitachi KOKI Company Limited (Koki Holdings Co., Ltd.)
• Inventors: Morita, Masataka, Tokunaga, Kazuyoshi, Yotsuyanagi, Mitsutoshi
• Primary Examiner(s): Teska, Kevin J.
• Assistant Examiner(s): LOPPNOW, MATTHEW CLAY
• Application Number:
  US08/296,629
• Time in Patent Office: 1,138 Days
• Field of Search: 364/578, 364/188, 364/496, 364/497, 364/498, 364/499, 233/23 R, 494/10, 494/37
• US Class Current: 703/6
• CPC Class Codes: B04B 13/00 Control arrangements specially designed for centrifuges; Programme control of centrifuges control arrangements for feed, charge, or discharge B04B11/00

Abstract

In an apparatus and a method for controlling centrifugal separator, simulation is performed, in Steps S1 to S4, for the process before and after change of parameters as centrifugation condition. The results are compared in Step S10, and operation of the centrifugal separator is controlled in Step S11. To obtain the measured data of the specimen, an attachment for analysis 15 is used, and the results are compared with the results of simulation, and parameters are corrected. To display the process in the middle of centrifugation, simulation is performed using the current parameters during operation of centrifugation, and the results are shown by graphic display on a display unit 2.

Claims

1. An apparatus for controlling a centrifugal separator, comprising:

means for inputting centrifugation condition already established as a centrifugation method for a specimen, which is to be centrifuged by a centrifugal separator, as first parameters;

means for inputting centrifugation condition to be used when said specimen is actually centrifuged by said centrifugal separator as second parameters;

means for executing simulation of centrifugal condition using said first parameters and said second parameters respectively;

means for comparing the result of said simulation obtained by the use of said first parameters and said second parameters to determine whether or not these two results have become identical with each other, or to calculate operating time when these two results will be identical with each other; and

means for generating a signal for controlling operation of said centrifugal separator in accordance with said means for determining or calculating.

2. An apparatus for controlling a centrifugal separator according to claim 1, wherein said means for generating signal for controlling is designed to generate a signal for stopping operation of said centrifugal separator when the results are determined as being identical with each other.

3. An apparatus for controlling a centrifugal separator having simulation function of centrifugation condition in said centrifugal separator, comprising:

means for incorporating parameters for the current centrifugation operation during centrifugation as a part of parameters of said simulation;

means for executing said simulation function for two times or more by changing time parameters used for simulation of said centrifugation condition at an adequate interval;

means for determining whether or not result for each execution of said simulation function is substantially identical with the result obtained by execution of said simulation function, using centrifugation condition already established as centrifugation method of substantially equal specimen as parameters;

means for calculating operating time to obtain said identical separation results; and

means for generating a signal for controlling operation of said centrifugal separator based on said means for determining.

4. A method for controlling a centrifugal separator, comprising the steps of;

inputting centrifugation condition already established as centrifugation method of said specimen, when centrifuging a specimen by a centrifugal separator, before starting centrifugation or during centrifugation as first parameters;

executing simulation of centrifugation condition using said first parameters,

inputting centrifugation condition to be used when said specimen is centrifuged by said centrifugal separator as second parameters;

executing simulation of centrifugal separation using said second parameters;

comparing the results of said simulation obtained by the use of said first parameters and said second parameters to determine whether or not these two results have become identical with each other or to calculate operating time when these two results will be identical with each other; and

generating a signal for controlling operation of said centrifugal separator in accordance with the determining step or calculating step.

5. A method for simulating centrifugation, comprising the steps of:

mounting an attachment for analysis and a rotor for analysis on a centrifugal separator, on which the attachment for analysis can be mounted, and placing a specimen on said rotor for analysis;

starting operation of said centrifugal separator;

simulating centrifugation according to predetermined centrifugation condition and other information;

optically analyzing said specimen using said attachment for analysis; and

correcting parameters to be used for said simulation by the use of data obtained as the result of said analysis.

6. A method for simulating centrifugation according to claim 5, wherein said step for correcting said parameters is to correct said parameters in such a manner that the result of said optical analysis is identical with the result obtained by execution of said simulation.