WO2006010744A1 - Verfahren zum kalibrieren von sensoren - Google Patents
Verfahren zum kalibrieren von sensoren Download PDFInfo
- Publication number
- WO2006010744A1 WO2006010744A1 PCT/EP2005/053589 EP2005053589W WO2006010744A1 WO 2006010744 A1 WO2006010744 A1 WO 2006010744A1 EP 2005053589 W EP2005053589 W EP 2005053589W WO 2006010744 A1 WO2006010744 A1 WO 2006010744A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- value
- measured
- reference value
- values
- measured values
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/22—Condition of the washing liquid, e.g. turbidity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/20—Washing liquid condition, e.g. turbidity
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
Definitions
- the invention relates to a method for calibrating sensors, in particular turbidity sensors in household appliances and an associated household appliance for carrying out the method.
- the cleaning program consists for example of the partial program steps "pre-rinsing", “cleaning”, “intermediate rinsing”, “rinsing” and “drying.” Within the partial program step “intermediate rinsing”, several intermediate rinsing steps are often carried out.
- the execution of further intermediate rinsing steps can be aborted by the controller of the dishwasher when it falls below a certain value of the degree of contamination.
- a considerable water and energy savings can be achieved with the same cleaning results.
- the rinsing liquor from the "pre-rinsing” can be used for the sub-program step "cleaning".
- Turbidity is generally measured by passing light through the cleaning fluid.
- other physical measuring methods eg. B. conceivable with sound.
- the transmitting device is, for example, a lamp or a light-emitting diode and, in the case of the receiving device, for example. B. to a phototransistor.
- the transceivers are subject to wear and aging changes. In addition, some significant deposits on the optical devices can sometimes occur. Temporary contamination at the transceivers can lead to significant errors in the measurements to lead. Over time, this leads to successively increasing errors in the measurements of the turbidity of the cleaning fluid. This leads to errors in the control of the household appliance.
- a household appliance with a measuring device for determining the degree of soiling of a cleaning liquid is known.
- an adjustment measurement is carried out with the measuring device in a cleaning program in which the measuring device is used to determine the degree of soiling of the cleaning liquid, preceding cleaning program, preferably in a program part with unpolluted rinsing liquid, e.g. B. rinsing, is performed.
- the measured value for the adjustment of the measuring device in the following cleaning program can be stored in a non-volatile memory.
- the disadvantage here is that, in the case of a small or hidden intermediate rinsing, not insignificant impurities can be contained in the rinsing liquor, even during rinsing, so that the measurement results can be falsified. Furthermore, only one adjustment measurement is carried out, so that at random occurring the strong contaminants, eg. B. at the transmitting device by punctual Ablage ⁇ ments, measurements for the alignment of the measuring device with significant errors are the result.
- a method for adjusting a turbidity sensor is known.
- several calibration value measurements are carried out at different times and stored in a first memory table, wherein calibration value measurements are carried out in a plurality of wash programs.
- the calibration measured value with the lowest degree of contamination is determined by selection for each wash program and written into a second memory table.
- the average value is calculated, which forms the reference value for the measurement with the turbidity sensor.
- the object of the present invention is therefore to provide a method and an associated household appliance for carrying out the method, which makes it possible in a simple manner under all operating conditions of a domestic appliance, in particular for temporary contaminants, to reliably calibrate sensors, e.g. B. turbidity sensors to allow.
- sensors e.g. B. turbidity sensors
- the selection of the at least one measured value by methods of statistics or probability calculation is carried out in each case from a series of measured values which were measured at the same times within a rinsing program sequence.
- the measured values are selected which were measured at the same times within a wash program sequence, so that they are similar to one another and suitable for further selection methods or calculations.
- the following steps are carried out to select at least one measured value:
- the interval of the probable limits of the possible reference value is set smaller, so that at least one measured value lies outside and this selects at least one measured value. This always causes at least one measured value selected.
- the method can thereby be adapted to changing conditions.
- predetermined empirical values are preferably additionally used from the factory to determine the probable limits of the possible reference value, which are automatically adjusted in the course of the procedure to changing conditions.
- the method can also be optimally applied to a new household appliance and there is an automatic adaptation to changing conditions, eg. As impurities, so that the inventive method "lern ⁇ able" is.
- the determination of the at least one possible reference value for the calibration of the sensor from the remaining, non-selected measured values is carried out by averaging.
- the possible reference values for the series of measured values for the measured values can be determined in a simple manner at any given point in time, and possibly existing incorrect measurements have only a small influence due to the averaging.
- the determination of the at least one possible reference value for the calibration of the sensor from the remaining, non-selected measured values is carried out by selecting a measured value by means of statistics or probability calculation methods. This makes it possible to rule out errors resulting from individual fault measurements that still exist, because only a single measured value is selected.
- the measured value with the highest probability density is selected within the non-selected measured values. This makes it possible to rule out possible errors compared with an averaging, which is based on measured values which may be subject to errors.
- That measured value which is closest to the arithmetic mean value of the non-selected measured values is selected as the reference value, by the following steps:
- Determination of the arithmetic mean values of the non-selected measured values - Determining the amount of the difference between the arithmetic mean and the respective measured value, wherein that measured values is selected, in which the amount of the difference is the smallest.
- the possible reference values is the most optimal, d. H.
- the method step of selecting at least one measured value is dispensed with, so that a simpler method is present.
- the selection of the at least one measured value is carried out by methods of statistics or probability calculation in each case from a series of measured values which were measured at the same times within a wash program sequence.
- the selection of the possible reference value is made from measured values which are comparable to one another.
- the measured value which is closest to the arithmetic average of the non-selected measured values is selected as the reference value by the following steps:
- Determination of the arithmetic mean value of the non-selected measured values - Determining the amount of the difference of the arithmetic mean value and the measured value, wherein that measured values is selected, in which the amount of the difference between the arithmetic mean value and the measured value is the smallest.
- the optimal values, d. H. In general, the reference value with the smallest degree of contamination selected as the reference value for the calibration of the sensor.
- a method according to one or more of the method steps described above can be carried out.
- Part of the invention also includes a computer program with program code for carrying out all the steps of a method according to one of the above-described steps when the computer program is executed on a computer or a corresponding computer unit.
- Part of the invention is also a computer program product with program code means which are stored on a computer-readable medium to perform a method according to one of the above steps, when the computer program is executed on a computer or a corresponding computing unit.
- 1 is a schematic representation of a turbidity sensor
- Fig. 2 is a schematic flow diagram for a washing program in a
- FIG. 3 shows an inventive flowchart for the determination of a Referenz ⁇ value for the calibration of the turbidity sensor and 4 shows a further flowchart according to the invention for determining the reference value for the calibration of the turbidity sensor.
- a turbidity sensor 6 is shown schematically. It has a transmitting device 1 as a lamp, which preferably emits visible light.
- the transmitting device 1 can also electromagnetic waves from other arbitrary Frequenzberei ⁇ chen, z. As infrared light, emit.
- a receiving device 2 as a photocell, the light incident on it is converted into electricity.
- a control and evaluation unit 4 supplies the transmitting device 1 with power and evaluates the power supplied by the receiving device 2.
- the transmitting device 1 and the receiving device 2 are connected via electrical lines 5 to the control and evaluation unit 4.
- the control and evaluation unit 4 can also be part of the control of a dishwasher according to the invention, i. H. no separate control and evaluation unit 4 is necessary for the turbidity sensor 6. Due to the change in the incident light on the receiving unit 2 at preferably constant power supply for the transmitting device 1, the degree of soiling of the washing liquor 3 is determined. The lower the power supplied by the receiving device 2, the greater the degree of contamination.
- the turbidity sensor 6 may be in the dishwashing machine according to the invention z. B. be installed in the washing or in a line for rinsing. With the aid of this value of the degree of contamination, the control of the dishwasher according to the invention controls the further program sequence. For example, if a certain degree of soiling is exceeded, the execution of further intermediate rinsing steps is interrupted or there is no change of washing liquor between pre-rinsing and cleaning.
- FIG. 2 shows a typical wash program sequence s of a dishwasher. On the abscissa axis the time is applied and on the ordinate axis the amount of rinsing liquor in the dishwasher.
- the wash program sequence consists of the program steps "Pre-wash”, “Clean”, “Intermediate rinse”, “Rinse” and “Dry”
- a rinsing program sequence only one measured value, preferably in the subprogram step "rinsing clear", or several reference values within the rinsing program can be measured, wherein also within a subprogram step, eg "rinsing", several measured values, e.g. B. m 3 1 , m 4 1 , for the calibration of the turbidity sensor 6 can be measured.
- the measured values m a s at a time t a are arranged one below the other as a series of measurements in columns in FIG. 2.
- the measured values are measured at the same time.
- FIG. 3 shows a flow chart according to the invention for determining the reference value m a s .
- the top section shows the measured values m a s .
- B the measured values m a s only from Spülprogrammab threadn s determined that have a low load, if z. B corresponding load sensors are present.
- the number of measurement times t a thus corresponds to the number of columns.
- a selection is carried out at least by preferably statistical methods a measured value m a s , which is no longer taken into account in the further steps.
- An example of such a statistical method will be described below.
- other methods are also suitable, eg. B. with the method of the Probability Calculus.
- the average measured value m a s with the smallest degree of contamination ie the largest average measured value m a s .
- This optimum mean value m a s is the reference value for the turbidity measurement in the preferably subsequent rinsing program.
- other criteria such as only possible reference values from a specific column, these criteria can also be set ex works and / or automatically adjusted.
- this operation unit it is also possible, in this operation unit, to move from the selected measured values m a s by selection, for example by means of selection.
- B. with methods of statistics, error theory or probability calculation, a single Mess ⁇ value m * a s from one column of measured values m a s for each t a , ie column, are selected.
- the optimal measured value m * a s is selected in the following operator, which is generally the measured value m * a s with the smallest degree of contamination, ie the largest measured value m * a s .
- This optimum measured value m * a s is the reference value for the turbidity measurement in the preferably subsequent rinsing program.
- the measured values m a s represent a number series Pn 1 1 , Pn 1 2 , Pn 1 3 , Pn 1 4 , Pn 1 5 ,..., M ⁇ for purge program sequences s for measured values at a time t a
- Measured values m a s the arithmetic average d i to d a for measured values m a s at the times t i to t a is determined with s as the number of measured values m a s at a time t a
- measured values m a s lie outside this probable limit.
- They will be lected se ⁇ . If one is in proportion to the number of measured values m a s excessive number of Messwer ⁇ th m a s outside, only those measured values m a s are excluded, which are to a certain value outside the probable limit can. If there are no measured values m a s outside the probable limit, measured values m a s are excluded which lie within the probable limits by a specific value.
- empirically determined values can also be preset at the factory, which are preferably inherent in the method sequence changing conditions are arithmetically adjusted.
- This method is carried out for all rows of the measured values m a s at the respective times t a . It is also possible, instead of the mean values d a, to determine the probabilities of the individual measured values m a s according to the probability calculation and to select those or those measured values m a s with the lowest or lowest probability, see FIG. 4.
- the probability density for the arithmetic mean of the measured value m a s is the greatest, irrespective of how the Gaussian error law is designed.
- the arithmetic mean is determined d '. Then the distance of the individual measured values m a s from this arithmetic mean d ' a with d ' i, d ' 2 , ... d ' a is to be determined, ie the amount I d ' a - m a s
- the measured values m a s can also be selected before the selection in the uppermost operating unit of the at least one measured value m a s .
- the uppermost operation unit present in FIG. 4 is therefore not used.
- the most optimal reference value is selected, which is generally the reference value with the smallest degree of contamination. This is done with the aid of a corresponding algorithm for determining the largest value. Deviating from this procedure, according to the laws of probability calculation , the probability density can be determined for each measured value m a s and that measured value which has the greatest probability density can be selected as the reference value.
- the intermediate or final values determined in this method are preferably temporarily stored in non-volatile memories. The control is carried out with a corresponding computer system.
- Part of the invention are also household appliances which are suitable for carrying out a method according to the invention and computer programs and computer program products for carrying out the method.
- the present method according to the invention for calibrating sensors in domestic appliances makes it possible to minimize the errors resulting from the selection of individual measured values by means of statistical methods, which results from the use of measured values with large deviations, for example. For example, due to temporary contamination, within a measurement series result in the determination of the reference value. Individual measured values with large deviations are selected, in particular using statistical methods.
- the selection of a single measured value as the reference value permits the error, which is determined by measured values with, in particular, strong deviations due to incorrect measurements, for example, to averaging. B. in the case of short-term deposits on the receiving or Sende ⁇ devices arises to prevent.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Washing And Drying Of Tableware (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800248928A CN1988838B (zh) | 2004-07-23 | 2005-07-22 | 用于校准传感器的方法 |
US11/658,059 US7558690B2 (en) | 2004-07-23 | 2005-07-22 | Method for calibrating sensors |
EP05776127.2A EP1773172B1 (de) | 2004-07-23 | 2005-07-22 | Verfahren zum kalibrieren von sensoren |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004035848.6 | 2004-07-23 | ||
DE102004035848A DE102004035848A1 (de) | 2004-07-23 | 2004-07-23 | Verfahren zum Kalibrieren von Sensoren |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006010744A1 true WO2006010744A1 (de) | 2006-02-02 |
Family
ID=35207596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/053589 WO2006010744A1 (de) | 2004-07-23 | 2005-07-22 | Verfahren zum kalibrieren von sensoren |
Country Status (6)
Country | Link |
---|---|
US (1) | US7558690B2 (de) |
EP (1) | EP1773172B1 (de) |
KR (1) | KR20070041496A (de) |
CN (1) | CN1988838B (de) |
DE (1) | DE102004035848A1 (de) |
WO (1) | WO2006010744A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2551650B1 (de) * | 2011-07-27 | 2019-09-25 | Endress+Hauser Consult AG | Kalibrierverfahren |
US9709505B2 (en) * | 2012-04-23 | 2017-07-18 | Samsung Electronics Co., Ltd. | Turbidity sensor and control method thereof |
TWI484142B (zh) * | 2012-12-07 | 2015-05-11 | Inst Information Industry | A multi-sensing element correction system, a correction method and a recording medium |
DE102013220035A1 (de) * | 2013-10-02 | 2015-04-02 | Meiko Maschinenbau Gmbh & Co. Kg | Verfahren zur Kalibrierung einer Reinigungsvorrichtung |
CN105455757A (zh) * | 2014-09-01 | 2016-04-06 | 青岛海尔洗碗机有限公司 | 带校准功能的浊度检测系统、检测方法及洗碗机 |
CN104485923B (zh) * | 2014-11-03 | 2017-09-15 | 佛山市顺德区美的洗涤电器制造有限公司 | 一种洗碗机及浊度传感器校准控制方法和装置 |
DE102016221446A1 (de) * | 2016-11-02 | 2018-05-03 | BSH Hausgeräte GmbH | Kalibrieren eines Sauerstoffsensors eines Haushaltsgeräts |
CN107478260A (zh) * | 2017-07-19 | 2017-12-15 | 武汉华显光电技术有限公司 | 计算机可读存储介质、感测器及其自动校准方法 |
DE102017217585A1 (de) * | 2017-10-04 | 2019-04-04 | BSH Hausgeräte GmbH | Verfahren zum Betreiben eines Haushaltsgeräts und Haushaltsgerät |
CN107907468B (zh) * | 2017-12-04 | 2020-11-06 | 广东美的制冷设备有限公司 | 传感器校准方法、传感器和空气处理设备 |
CN117761269A (zh) * | 2019-12-02 | 2024-03-26 | 上海明胜品智人工智能科技有限公司 | 水质的检测方法及装置、存储介质和电子装置 |
DE102020212542A1 (de) * | 2020-10-05 | 2022-04-07 | BSH Hausgeräte GmbH | Wäschepflegegerät mit einer Steuerung |
CN113598682B (zh) * | 2021-07-19 | 2022-11-08 | 佛山市百斯特电器科技有限公司 | 一种浊度检测装置的校准方法、校准装置及洗涤设备 |
US11849901B2 (en) | 2021-09-01 | 2023-12-26 | Haier Us Appliance Solutions, Inc. | Dishwashing appliance and methods for improved calibration using image recognition |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04279136A (ja) * | 1991-03-06 | 1992-10-05 | Mitsubishi Electric Corp | 食器洗浄機 |
EP0862892A2 (de) * | 1997-02-17 | 1998-09-09 | AEG Hausgeräte GmbH | Haushaltsgerät mit einer Messeinrichtung zum Ermitteln des Verschmutzungsgrades einer Reinigungsflüssigkeit |
DE10111006A1 (de) * | 2001-03-07 | 2002-11-07 | Miele & Cie | Verfahren zum Abgleichen eines Trübungssensors |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR950011609B1 (ko) * | 1993-06-19 | 1995-10-06 | 엘지전자주식회사 | 세탁기의 세탁 제어방법과 장치 |
US5560060A (en) * | 1995-01-10 | 1996-10-01 | General Electric Company | System and method for adjusting the operating cycle of a cleaning appliance |
DE19521326A1 (de) * | 1995-06-12 | 1996-12-19 | Bosch Siemens Hausgeraete | Verfahren zur Temperaturkompensation der Meßwerte eines Trübungssensors in einer automatischen Wasch- oder Geschirrspülmaschine |
CN1231627C (zh) * | 2002-05-08 | 2005-12-14 | 江苏海狮机械集团有限公司 | 模糊控制工业洗衣机浑浊度的检测及控制方法 |
-
2004
- 2004-07-23 DE DE102004035848A patent/DE102004035848A1/de not_active Withdrawn
-
2005
- 2005-07-22 KR KR1020077000188A patent/KR20070041496A/ko not_active Application Discontinuation
- 2005-07-22 US US11/658,059 patent/US7558690B2/en not_active Expired - Fee Related
- 2005-07-22 CN CN2005800248928A patent/CN1988838B/zh not_active Expired - Fee Related
- 2005-07-22 WO PCT/EP2005/053589 patent/WO2006010744A1/de active Application Filing
- 2005-07-22 EP EP05776127.2A patent/EP1773172B1/de not_active Not-in-force
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04279136A (ja) * | 1991-03-06 | 1992-10-05 | Mitsubishi Electric Corp | 食器洗浄機 |
EP0862892A2 (de) * | 1997-02-17 | 1998-09-09 | AEG Hausgeräte GmbH | Haushaltsgerät mit einer Messeinrichtung zum Ermitteln des Verschmutzungsgrades einer Reinigungsflüssigkeit |
DE10111006A1 (de) * | 2001-03-07 | 2002-11-07 | Miele & Cie | Verfahren zum Abgleichen eines Trübungssensors |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 017, no. 079 (C - 1027) 17 February 1993 (1993-02-17) * |
Also Published As
Publication number | Publication date |
---|---|
EP1773172B1 (de) | 2017-09-06 |
CN1988838A (zh) | 2007-06-27 |
DE102004035848A1 (de) | 2006-03-23 |
US7558690B2 (en) | 2009-07-07 |
US20080040063A1 (en) | 2008-02-14 |
CN1988838B (zh) | 2010-11-17 |
KR20070041496A (ko) | 2007-04-18 |
EP1773172A1 (de) | 2007-04-18 |
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