WO2009069999A2 - Method for determination of chemical ions - Google Patents

Method for determination of chemical ions Download PDF

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Publication number
WO2009069999A2
WO2009069999A2 PCT/MY2008/000171 MY2008000171W WO2009069999A2 WO 2009069999 A2 WO2009069999 A2 WO 2009069999A2 MY 2008000171 W MY2008000171 W MY 2008000171W WO 2009069999 A2 WO2009069999 A2 WO 2009069999A2
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WO
WIPO (PCT)
Prior art keywords
sensor
ions
processing means
providing
digital signal
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
PCT/MY2008/000171
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French (fr)
Other versions
WO2009069999A3 (en
Inventor
Wan Jamil Wan Adi
Karim Aymen
Othman Masuri
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.)
Mimos Bhd
Original Assignee
Mimos Bhd
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 Mimos Bhd filed Critical Mimos Bhd
Publication of WO2009069999A2 publication Critical patent/WO2009069999A2/en
Publication of WO2009069999A3 publication Critical patent/WO2009069999A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24—Earth materials

Definitions

  • the present invention relates to the ions detections, more particularly, the invention discloses a method for improving the detection of chemical ions; particularly in relation to soil analysis.
  • the chemical sensors detects chemical ions in a sample or in-field measurement, comprise of at least a sensing element and components which function to provide measurements and thus convert electrical data obtained from the said sensor or sensing element to a digital signal.
  • sensors are known in the art to have greater toleration for errors and providing greater overall accuracy, in addition to providing a real-time measurement for users, the usage has been gaining tremendous momentum.
  • the method has been enhanced with the progress of automated sensors, and a wide variation of sensing capability.
  • An eminent disadvantage is the disturbance of ions or interference of ions during employment of the sensing element within the sample, in particular in soil analysis.
  • a method that requires a single sensor detects selected ion activities with the presence of different other ions in the soil. Comprehendingly, the single ion detection is disrupted with the existence of other ions activities.
  • the undesired disturbance which are also known as noise of interfering ions, adversely affects the primary ion detection and signature.
  • the riot of ions in the measuring soil produces an extreme level of noises, and thus the retrieval of data is made difficult for users.
  • the present invention has been accomplished in addition to significantly improve the detection of ions within the soil.
  • the present invention discloses A method for reducing and/or eliminating signal interferences from other ions which are produced during detection of a particular chemical ion in a substance, said method comprise of :
  • a second sensor (4) for collecting the interfering signals from other ions within the substance; providing a digital signal processing means; said digital processing means comprising an adder (6) for combining the signals from the first and second sensors (2,4), and a learning block (8) for providing optimum output;
  • first sensor (2) and the second sensor (4) are connected to the digital signal processing means;
  • the digital signal processing means reduces the interfering signals from other ions within the substance.
  • Fig 1 is a circuit diagram that illustrates the sensor array linked to the digital processing means (DSP) in accordance to the present invention.
  • the present invention which is designed preferably for detecting chemical species and their concentration levels in soil comprise of a first and second sensor (2, 4) and a digital processing means as shown in Figure 1. Accordingly, the first sensor (2) and the second sensor (4) is coupled to an adder (6), said adder (6) is one of the digital processing (DSP) components.
  • DSP digital processing
  • the method of the present invention further includes an algorithm for eliminating interfering ions.
  • first sensor (2) and second sensor (4) encompass the following properties:
  • the first sensor (2) is preferably selective to the respective ion to be detected, however the said sensor (2) is capable of detecting other interfering ions at a lower degree;
  • the second sensor (4) is preferably sensitive to all ions available within the sample.
  • the operational view of the method proceeds as follows.
  • the first and second sensors (2, 4) are coupled to the adder (6) which is an essential component of the digital processing means.
  • the first sensor (2) is provided for detecting the desired chemical ion activities within the sample, in particular soil
  • the second sensor (4) is provided for collecting the undesired signals of other ions activities within the said sample.
  • the collected signal forms
  • DSP digital signal processing
  • the digital signal processing (DSP) means which can be considered as the intelligence part of the method functions mainly to manipulate the inputs of both sensors (2,4) digitally in order to minimize the noise level or effects in the desired signal.
  • the digital signal processing (DSP) means further comprise of an adder (6) for combination of the signals from sensors (2, 4), and a learning block (8) .
  • the signal from the second sensor (4) is sent to the learning block (8) of the digital processing means prior to the adder (6) .
  • the learning block (8) is a special filter where the coefficients ( ⁇ ) are updated every cycle of time for obtaining the optimum output, and thus improves the detection of the desired ion tremendously.
  • the signal from sensor (2) may be contaminated or interfered with other ions signals. Accordingly, both signals from the first sensor (2) and second sensor (4) are added into the noise cancellation process in order to eliminate the undesired noise level .
  • the negative magnitude eliminates the noise level, and thus results to a more precise or accurate outcome.
  • V v l - ⁇ v2
  • V is the actual concentration of the chemical ion which is desired by user.
  • the second sensor (4) which mainly functions to collect the undesired signals together with the digital signal processing (DSP) means play a major role in providing more accurate and precise chemical ion detection method.
  • DSP digital signal processing

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Analytical Chemistry (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The present invention provides a method for reducing and/or eliminating signal interferences from other ions which are produced during detection of a particular chemical ion in a substance, said method comprise of at least two sensors (2,4) whereby at least one sensor is assigned to collect the interfering signals prior to the elimination of unwanted signals process. The method of the present invention leads to improved detection of the desired ion and thus provides real time monitoring of the substance, in particular for soil analysis.

Description

METHOD FOR DETERMINATION OF CHEMICAL IONS
Field of Invention
The present invention relates to the ions detections, more particularly, the invention discloses a method for improving the detection of chemical ions; particularly in relation to soil analysis.
Background of Invention
The chemical sensors for use in the agricultural industry currently are very well known and much has been written about them. Nevertheless, with the rapid growth of various agronomical demands and precision management purposes globally, have inspired the respective innovators to constantly seek and thus create value-added and enhanced chemical sensing methods which are capable of generating a more precise and reliable outcome in regards to soil chemical measurements and analysis.
Formerly, typical methods for measuring nutrients within soil involves arduous steps, whereby soil sampling is a necessity, which is rather time consuming and inconvenient. With the assistance of chemical sensors or in-field sensors at present, such tribulations can be alleviated. The chemical sensors detects chemical ions in a sample or in-field measurement, comprise of at least a sensing element and components which function to provide measurements and thus convert electrical data obtained from the said sensor or sensing element to a digital signal. As sensors are known in the art to have greater toleration for errors and providing greater overall accuracy, in addition to providing a real-time measurement for users, the usage has been gaining tremendous momentum. At present, the method has been enhanced with the progress of automated sensors, and a wide variation of sensing capability.
Whilst most of the prior art is expedient for users of the industry, users may find such method of measurement is rather inadequate at some degree. An eminent disadvantage is the disturbance of ions or interference of ions during employment of the sensing element within the sample, in particular in soil analysis. In this circumstance, a method that requires a single sensor detects selected ion activities with the presence of different other ions in the soil. Comprehendingly, the single ion detection is disrupted with the existence of other ions activities. The undesired disturbance which are also known as noise of interfering ions, adversely affects the primary ion detection and signature. In many cases, the riot of ions in the measuring soil produces an extreme level of noises, and thus the retrieval of data is made difficult for users.
In addition to the above, there is a great need for a more efficient and reliable method in monitoring soil pollution with the assistance of chemical sensors. Increasing soil pollution issues has alerted respective organizations to put forward stringent methods to provide effective soil monitoring and thus provide early detection or warning to the public, in particular commercial operators, as they can be notified immediately on any event of soil contamination within the country.
Based on the above, a method for providing accurate and immediate result in relation to soil contamination analysis is essential in order to reduce pollution and its consequences to living things.
In order to prevail over the aforementioned drawback, the present invention has been accomplished in addition to significantly improve the detection of ions within the soil.
It is therefore the primary object of the present invention to provide a method for detection of chemical ions in soil with improved accuracy and devoid of any noise interference.
It is another object of the present invention to provide a method for detection of chemical ions in soil with real-time monitoring and thus providing swift counteractive action in relation to soil pollution.
It is still further object of the present invention to provide a method of chemical ions detection in soil, said method alleviates the noise interference from other ions within the sample.
In is another object of the present invention to provide a method of chemical ions detection in soil, wherein the method improves the limitation of low immunity in the presence of multiple amounts of chemical ions .
Summary of Invention
The present invention discloses A method for reducing and/or eliminating signal interferences from other ions which are produced during detection of a particular chemical ion in a substance, said method comprise of :
providing a first sensor (2) for detecting the chemical ion and for providing a signal" based on the said detection;
providing a second sensor (4) for collecting the interfering signals from other ions within the substance; providing a digital signal processing means; said digital processing means comprising an adder (6) for combining the signals from the first and second sensors (2,4), and a learning block (8) for providing optimum output;
wherein the first sensor (2) and the second sensor (4) are connected to the digital signal processing means;
wherein the digital signal processing means reduces the interfering signals from other ions within the substance.
Brief Description of* the Drawings
The invention will be more understood by reference to the description below taken in conjunction with the accompanying drawings herein:
Fig 1 is a circuit diagram that illustrates the sensor array linked to the digital processing means (DSP) in accordance to the present invention.
Detailed Description of the Invention
In addition to the drawings, further understanding of the object, construction, characteristics and functions of the invention, a detailed description with reference to the embodiments is given in the following.
The present invention which is designed preferably for detecting chemical species and their concentration levels in soil comprise of a first and second sensor (2, 4) and a digital processing means as shown in Figure 1. Accordingly, the first sensor (2) and the second sensor (4) is coupled to an adder (6), said adder (6) is one of the digital processing (DSP) components.
The method of the present invention further includes an algorithm for eliminating interfering ions.
It is noted that both of first sensor (2) and second sensor (4) encompass the following properties:
a) The first sensor (2) is preferably selective to the respective ion to be detected, however the said sensor (2) is capable of detecting other interfering ions at a lower degree;
b) The second sensor (4) is preferably sensitive to all ions available within the sample. In principle, the operational view of the method proceeds as follows. The first and second sensors (2, 4) are coupled to the adder (6) which is an essential component of the digital processing means. Suitably, the first sensor (2) is provided for detecting the desired chemical ion activities within the sample, in particular soil, and the second sensor (4) is provided for collecting the undesired signals of other ions activities within the said sample. The collected signal forms
• part of the noise elimination process which is performed by the digital signal processing (DSP) means.
Still referring to Figure 1, the digital signal processing (DSP) means which can be considered as the intelligence part of the method functions mainly to manipulate the inputs of both sensors (2,4) digitally in order to minimize the noise level or effects in the desired signal. The digital signal processing (DSP) means further comprise of an adder (6) for combination of the signals from sensors (2, 4), and a learning block (8) . The signal from the second sensor (4) is sent to the learning block (8) of the digital processing means prior to the adder (6) . Suitably, the learning block (8) is a special filter where the coefficients (β) are updated every cycle of time for obtaining the optimum output, and thus improves the detection of the desired ion tremendously. Upon employed the method of the present invention the signal from sensor (2) may be contaminated or interfered with other ions signals. Accordingly, both signals from the first sensor (2) and second sensor (4) are added into the noise cancellation process in order to eliminate the undesired noise level .
The formula which is associated with the main principle of the noise cancellation process is as follows:
Output = (Signal + Noise) - β Noise = Desired Signal
From the aforementioned principle, the negative magnitude eliminates the noise level, and thus results to a more precise or accurate outcome.
It is noted that the noise levels detected by both first and second sensors (2, 4) are independent. With the incorporation of the two sensors array, the removal of interfering ions is achieved; said removal or elimination is based on the following algorithm:
V 1 = al + α∑ni is the observed output of the first sensor (2) and; V 2 = Σ rii is the other ions total output from the second sensor (4) ;
Accordingly, the overall output from both sensors (2,4) is therefore:
V = v l - βv2
= al + Σ rii - β∑ n±;
( for the purpose of simplification let β= 1 ) = al
Wherein;
al is the desired ion for detection; β is the adaptive coefficient; ni is the other interfering ions;
V is the actual concentration of the chemical ion which is desired by user.
Based on the aforementioned principle, the second sensor (4) which mainly functions to collect the undesired signals together with the digital signal processing (DSP) means play a major role in providing more accurate and precise chemical ion detection method. With the assistance of rapid mechanism or method of the present invention, the existence of pollutant in soil can be detected immediately and thus prevents the damaging effects of said pollutants to living things.
Although the present invention has been described with reference to the preferred embodiment thereof, it is apparent to those skilled in the art that a variety of modifications and changes may be made without departing from the scope of the present invention which is intended to be defined by the appended claims.

Claims

1. A method for reducing and/or eliminating signal interferences from other ions which are produced during detection of a particular chemical ion in a substance, said method comprise of :
providing a first sensor (2) for detecting the chemical ion and for providing a signal based on the said detection; providing a second sensor (4) for collecting the interfering signals from other ions within the substance; providing a digital signal processing means; said digital processing means comprising an adder (6) for combining the signals from the first and second sensors (2,4), and a learning block (8) for providing optimum output; wherein the first sensor (2) and the second sensor (4) are connected to the digital signal processing means; wherein the digital signal processing means reduces the interfering signals from other ions within the substance.
2. A method as claimed in Claim 1, wherein the algorithm used for removal of interfering signals is as below: V = v l - βv2 = al + Σ rii - β∑ ni ,-
(for the purpose of simplification let β= 1) = al
Wherein;
al is the desired ion for detection; β is the adaptive coefficient; ni is the other interfering ions; V is the actual concentration of the chemical ion which is desired by user.
3. A method as claimed in Claim 1 wherein the digital signal processing means digitally manipulates the interfering signals and provides a more accurate output signal.
4. A method as claimed in Claim 1 for use in soil analysis.
5. A method as claimed in Claim 1 wherein the first sensor (2) and the second sensor (4) is connected to the adder (6) of the digital signal processing means.
PCT/MY2008/000171 2007-11-30 2008-12-01 Method for determination of chemical ions Ceased WO2009069999A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI20072138 2007-11-30
MYPI20072138 MY143657A (en) 2007-11-30 2007-11-30 Method for determination of chemical ions

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WO2009069999A2 true WO2009069999A2 (en) 2009-06-04
WO2009069999A3 WO2009069999A3 (en) 2009-10-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200256821A1 (en) * 2018-02-23 2020-08-13 Hitachi High-Tech Corporation Automated analyzer and automatic analysis method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5580441A (en) * 1993-12-16 1996-12-03 Kabushiki Kaisha Toshiba Method of measuring ion concentration and apparatus therefor
JPH10117593A (en) * 1996-10-18 1998-05-12 Terada Seisakusho Co Ltd Field management device
JP3558492B2 (en) * 1997-05-19 2004-08-25 株式会社光電製作所 Apparatus and method for measuring dry density of soil
US7544979B2 (en) * 2004-04-16 2009-06-09 Technion Research & Development Foundation Ltd. Ion concentration transistor and dual-mode sensors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200256821A1 (en) * 2018-02-23 2020-08-13 Hitachi High-Tech Corporation Automated analyzer and automatic analysis method

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WO2009069999A3 (en) 2009-10-15

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