CN112345569A - Typical contaminated site soil heavy metal detection system and method based on X-ray - Google Patents
Typical contaminated site soil heavy metal detection system and method based on X-ray Download PDFInfo
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Abstract
The invention relates to a typical contaminated site soil heavy metal detection system and method based on X-rays. According to the invention, a humidity influence compensation algorithm is arranged in the data processing module, a qualitative and quantitative calculation mathematical model is established, and the data correction is completed after the original data collected by the optical transceiver is subjected to modular calculation, so that the influence of soil humidity on the metal content measured by the X-ray fluorescence spectrometry is reduced.
Description
Technical Field
The invention relates to the technical field of soil detection, in particular to a typical contaminated site soil heavy metal detection system and method based on X-rays.
Background
Soil is the environment in which plants depend for survival, and contains a large number of elements and different forms. The composition and content of elements in soil determine the fertility and environmental quality of soil, including beneficial elements required for plant growth, and also including harmful elements represented by heavy metals. Early China soil environment monitoring emphasizes soil fertility detection, and in recent years, with the aggravation of heavy metal pollution in soil, relevant departments gradually turn the gravity center to the detection of soil environment pollution, especially heavy metal pollution in soil. Through the quick effective survey to heavy metal in the soil, can in time know the pollution situation of soil, carry out reasonable risk assessment, the method step that detects soil element in the traditional laboratory of evaluation environment repair effect is loaded down with trivial details, and is consuming time hard, and need use a large amount of consumptive materials and dangerous chemical reagent, handles improper and leads to secondary pollution easily, also does not benefit to the monitoring of implementing heavy metal in extensive soil. Therefore, it is necessary to find a simple, fast, safe, efficient and reliable method for detecting elements in soil.
The portable X-ray fluorescence spectrometer is mainly applied to element measurement of solid wastes such as soil, mineral resources, sludge, petrochemical products, alloys and the like, particularly heavy metal elements. The method is low in cost and simple in operation, does not need destructive treatment on samples, has the characteristics of high analysis speed, capability of simultaneously measuring a plurality of elements, strong stability, environmental protection, convenience in carrying, capability of in-situ detection, ex-situ detection and the like.
The composition of a soil sample is complex, and the soil type, the moisture content, the particle size, the composition and the like can influence the test result of the spectrometer to a certain extent. Meanwhile, the heavy metals in the soil are various, the response rules of different heavy metal elements to the variation of the soil moisture are possibly different, and the influence of the humidity on the detection result cannot be well eliminated by the current measuring equipment on the market.
Disclosure of Invention
Therefore, the invention provides a typical contaminated site soil heavy metal detection system and method based on X-rays, which are used for solving the problem that the influence of humidity on a soil detection result cannot be eliminated by a convenient detector in the prior art.
In order to achieve the purpose, the invention provides a typical contaminated site soil heavy metal detection system and method based on X-rays, which comprises the following steps:
a housing to protect components loaded therein;
the optical transceiver is arranged at one end of the outer side of the shell and used for transmitting X rays to soil to be detected and collecting feedback rays;
the component analysis module is arranged inside the shell and connected with the optical transceiver, and a preset metal type matrix P0, a preset metal spectral value matrix Q0 and a preset number detection matrix group S0 are arranged in the component analysis module and used for analyzing the feedback rays collected by the optical transceiver and generating an initial detection result;
the data processing module is arranged in the shell and connected with the component analysis module, and a compensation value matrix set CO is arranged in the data processing module and used for correcting the initial detection result;
the humidity detection module is arranged on the outer side of the shell, is positioned on the same side as the optical transceiver, and is internally provided with a humidity interval matrix R0 for detecting the humidity of the soil to be detected;
the detection button is arranged on the outer side of the shell, is respectively connected with the humidity detection module and the optical transceiver and is used for starting the humidity detection module and the optical transceiver;
when the detection device is used, the humidity detection module and the optical transceiver are started by pressing the detection button;
the display screen is arranged on the outer side of the shell, is connected with the data processing module and is used for displaying the detection result corrected by the data processing module;
the key group comprises a plurality of keys, and each key is uniformly arranged on the same side of the shell as the display screen, is respectively connected with the data processing module and is used for selecting the working mode of the data processing module;
and the memory card slot is arranged on the outer side of the shell, is connected with the data processing module and is used for loading an external memory card.
Further, a preset heavy metal species matrix P0 and a preset heavy metal spectral value matrix Q0 are arranged in the component analysis module;
for the preset heavy metal type matrices P0, P0(P1, P2, P3, … … Pn), where P1 is a first preset type of heavy metal, P2 is a second preset type of heavy metal, P3 is a third preset type of heavy metal, and … … Pn is an nth preset type of heavy metal.
For the predetermined heavy metal spectral value matrices Q0, Q0(Q1, Q2, Q3, … … Qn), wherein Q1 is the first predetermined heavy metal spectral value, Q2 is the second predetermined heavy metal spectral value, Q3 is the third predetermined heavy metal spectral value, and … … Qn is the nth predetermined heavy metal spectral value.
When the detection device is used, the optical transceiver receives feedback rays and then transmits data to the component analysis module, when the component analysis module analyzes the feedback rays, the component analysis module can extract a plurality of different spectral values from the feedback rays, each spectral value has a corresponding spectral value Qx, and the Qx is compared with each parameter in the Q0 matrix:
when Qx is Q1, the component analysis module judges that the soil to be detected contains heavy metal P1;
when Qx is Q2, the component analysis module judges that the soil to be detected contains heavy metal P2;
when Qx is Q3, the component analysis module judges that the soil to be detected contains heavy metal P3;
……
and when Qx is equal to Qn, the component analysis module judges that the soil to be detected contains heavy metal Pn.
Further, a preset number detection matrix group S0(S1, S2, S3,. Sn) is further provided in the component analysis module, wherein S1 is a first preset type heavy metal detection number matrix, S2 is a second preset type heavy metal detection number matrix, S3 is a third preset type heavy metal detection number matrix, and … … Sn is an nth preset type heavy metal detection number matrix.
The detection quantity matrixes S1, S1 for the first preset kind of heavy metal (S11, S12, S13, … … S1 p);
when the component analysis module analyzes the feedback ray, it can extract a plurality of different spectral values from the feedback ray and detect the area of each spectral value, and the component analysis module compares the area si of each spectral value with the corresponding preset spectral determination area standard value in the S0 matrix, and for the first preset type heavy metal detection quantity matrix S1:
when the area 0 of the first preset heavy metal spectral value Q1 in the spectral values is not less than s1 and less than s11, the component analysis module preliminarily judges that the first preset heavy metal P1 in the soil with detection contains D11;
when the area s11 of the first preset heavy metal spectrum value Q1 in the spectrum values is not less than s1 and is less than s11, the component analysis module preliminarily judges that the content of the first preset heavy metal P1 in the soil with detection is D12;
when the area s11 of the first preset heavy metal spectrum value Q1 in the spectrum values is not less than s1 and is less than Ss11, the component analysis module preliminarily judges that the content of the first preset heavy metal P1 in the soil with detection is D13;
……
and when the area s1P-1 of the first preset heavy metal spectral value Q1 in the spectral values is not less than s1 and is less than s1P, the component analysis module preliminarily judges that the first preset heavy metal P1 in the soil with detection contains D1P.
Further, a soil humidity interval matrix R0(R1, R2, R3, … … Rm) is preset in the humidity detection module, wherein R1 is an interval parameter on a first humidity interval, R2 is an interval parameter on a second humidity interval, R3 is an interval parameter on a third humidity interval, and … … Rm is an interval parameter on an mth humidity interval;
when the component analysis module completes the preliminary analysis of the content of heavy metals in soil, the humidity detection module detects the humidity R of the soil to be detected and compares R with various parameters in the R0 matrix:
the soil humidity R to be detected and the soil humidity matrix interval R0 can be contrasted, and the range of the soil humidity to be detected is judged:
when R is more than or equal to 0 and less than R1, the humidity detection module judges that the soil humidity to be detected is in a first humidity range;
when R1 is not less than R < R2, the humidity detection module judges that the soil humidity to be detected is in a second humidity range;
……
and when Rn-1 is more than or equal to R and less than Rm, the humidity detection module judges that the soil humidity to be detected is in the mth humidity range.
Further, compensation value matrix groups CO, CO (C1, C2, C3, … … Cn) are provided in the data processing module, where C1 is a first preset compensation value matrix, C2 is a second preset compensation value matrix, C2 is a third preset compensation value matrix, and … … Cn is an nth preset compensation value matrix.
When the data processing module compensates the content value of the first heavy metal P1, the data processing module selects the corresponding compensation value in the C1 matrix to compensate the content value of the first heavy metal P1;
when the data processing module compensates the content value of the second heavy metal P2, the data processing module selects the corresponding compensation value in the C2 matrix to compensate the content value of the second heavy metal P2;
when the data processing module compensates the content value of the third heavy metal P3, the data processing module selects the corresponding compensation value in the C3 matrix to compensate the content value of the third heavy metal P3;
……
when the data processing module compensates the content value of the first kind of heavy metal Pn, the data processing module selects the corresponding compensation value in the Cn matrix to compensate the content value of the nth kind of heavy metal Pn.
Further, for the ith preset compensation value matrix Ci, i is 1,2, 3.. n, Ci (Ci1, Ci2, Ci 3.. Cim), wherein Ci1 is a first preset compensation value of the ith heavy metal, Ci2 is a second preset compensation value of the ith heavy metal, and … … Cim is an mth preset compensation value of the ith heavy metal.
When the data processing module compensates the content of the ith heavy metal in the soil to be detected, the data processing module selects a corresponding compensation value from the Ci matrix:
when the soil to be detected is located in a first humidity interval, the data processing module selects Ci1 from the Ci matrix to compensate the content value of the Pi heavy metal;
when the soil to be detected is located in a second humidity interval, the data processing module selects Ci2 from the Ci matrix to compensate the content value of the Pi heavy metal;
……
and when the soil to be detected is positioned in the mth humidity interval, the data processing module selects Cim from the Ci matrix to compensate the content value of the heavy metal Pi.
Further, a compensation correction formula is arranged in the data processing module:
Ki＝Dik×Cij
where Ki denotes a corrected value of the heavy metal Pi, Dik denotes an initial detection value of the heavy metal Pi, Ci denotes an offset value of the heavy metal Pi in the j-th humidity range, i is 1,2,3, … … n, j is 1,2,3, … … m, and k is 1,2,3 … … p.
Furthermore, humidity detection module front end has the probe rod, and the probe rod can visit into soil for make moisture detector detects the inside humidity of soil.
Further, the lower end of the shell is in a handle shape.
Compared with the prior art, the detection device has the advantages that the detection device is provided with the component analysis module, the humidity detection module and the data processing module, the component analysis module can analyze and detect the types of heavy metal elements and the quantity of various heavy metals in soil according to signals and generate initial detection results, the humidity detection module can detect the soil humidity on line, the data processing module can generate compensation values for the heavy metals according to different humidity and correct the initial detection results, so that the detected heavy metal values in the soil are more accurate, and the influence of the humidity on the soil detection results is effectively eliminated.
Further, the component analysis module is provided with a heavy metal species matrix P0 and a heavy metal spectral value matrix Q0:
in the heavy metal species matrix P0(P1, P2, P3, … … Pn), P1 is a first heavy metal, P2 is a second heavy metal, P3 is a third heavy metal, … … Pn is an nth heavy metal; in a heavy metal spectral value matrix Q0(Q1, Q2, Q3 and … … Qn), Q1 is a first heavy metal spectral value, Q2 is a second heavy metal spectral value, Q3 is a third heavy metal spectral value, … … Qn is an nth heavy metal spectral value, the spectral values are gradually increased in sequence, the spectral values of heavy metals in the heavy metal type matrix P0 correspond to the spectral values of heavy metals in the heavy metal spectral value matrix Q0, the heavy metal types can be determined through comparison, so that the determination of the types of the heavy metals in the soil to be detected is rapidly completed, and the detection efficiency of the detection device is improved.
Further, a soil humidity interval matrix R0(R1, R2, R3, … … Rm) is preset in the humidity detection module, wherein R1 is a first humidity interval, R2 is a second humidity interval, R3 is a third humidity interval, … … Rm is an m-th humidity interval, the humidity detection module can compare the soil humidity R to be detected with the soil humidity matrix interval R0, and the range of the soil humidity to be detected is judged:
when R is more than or equal to 0 and less than or equal to R1, R is positioned in a first humidity interval;
when R is not less than R1 and not more than R2, R is positioned in a second humidity range;
……
when Rn-1 is more than or equal to R and less than or equal to Rm, R is positioned in the mth humidity interval.
By judging the soil humidity range, more soil environment data can be obtained.
Furthermore, a compensation value matrix group CO, CO (C1, C2, C3, … … Cn) is set in the data processing module, wherein C1 is a heavy metal P1 compensation value matrix, C2 is a heavy metal P2 compensation value matrix, C3 is a heavy metal P3 compensation value matrix, and … … Cn is a heavy metal Pn compensation value matrix;
for the compensation value matrix C1, C1(C11, C12, C13, … … C1m), C11 is the compensation value of the heavy metal P1 in the humidity interval R1, C12 is the compensation value of the heavy metal P1 in the humidity interval R2, C13 is the compensation value of the heavy metal P1 in the humidity interval R3, … … C1m is the compensation value of the heavy metal P1 in the humidity interval Rm;
for the compensation value matrix C2, C2(C21, C22, C23, … … C2m), C21 is the compensation value of the heavy metal P2 in the humidity interval R1, C22 is the compensation value of the heavy metal P2 in the humidity interval R2, C23 is the compensation value of the heavy metal P2 in the humidity interval R3, … … C2m is the compensation value of the heavy metal P2 in the humidity interval Rm;
……
for the compensation value matrices Cn, Cn (Cn1, Cn2, Cn3, … … Cnm), Cn1 is the compensation value of the heavy metal Pn in the humidity interval R1, Cn2 is the compensation value of the heavy metal Pn in the humidity interval R2, Cn3 is the compensation value of the heavy metal Pn in the humidity interval R3, and … … Cnm is the compensation value of the heavy metal Pn in the humidity interval Rm.
The data processing module is internally provided with a compensation correction formula:
Ki＝Ni×Cij
where Ki denotes a corrected value of the heavy metal Pi, Ni denotes an initial detection value of the heavy metal Pi, Ci denotes an offset value of the heavy metal Pi within the humidity range Rj, and i is 1,2,3, … … n, and j is 1,2,3, … … m. More accurate heavy metal content data value in the soil to be detected can be obtained through compensation correction, and the influence of humidity on the soil detection result is effectively eliminated.
Furthermore, humidity detection module front end has the probe rod, can visit into soil, from the inside humidity data of gathering of soil for humidity data is more accurate, thereby makes measuring result more accurate.
Furthermore, the lower end of the shell is in a handle shape, so that the device is held by a hand when detection is convenient, the convenience of the device is enhanced, personnel can operate more conveniently, and errors caused by inconvenient operation are reduced.
Drawings
FIG. 1 is a schematic structural diagram of a typical contaminated site soil heavy metal detection system and method based on X-rays according to the present invention;
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a typical contaminated site soil heavy metal detection system and method based on X-rays according to the present invention. The soil heavy metal detection device based on the X-ray comprises a shell 1, an optical transceiver 2, a component analysis module 3, a data processing module 4, a humidity detection module 5, a detection button 6, a display screen 7, a key module 8 and a memory card slot 9. The optical transceiver 2 is arranged outside the shell 1, the optical transceiver 2 is connected with the composition analysis module 3, and the optical transceiver 2 is provided with an X-ray emitter and a feedback signal receiver, can emit X-rays to soil to be detected, receives a soil feedback signal and transmits the received feedback signal to the composition analysis module 3; the humidity detection module 5 is arranged outside the shell, is positioned on the same side of the optical transceiver and is connected with the data processing module 4, and a detection rod is arranged at the front end of the humidity detection module 5 and can be inserted into soil, so that humidity data can be collected from the inside of the soil and transmitted to the data processing module 4; the component analysis module 3 is arranged inside the shell 1, is connected with the data processing module 4, can analyze the feedback signal to generate an initial detection result, and transmits the result to the data processing module 4; the data processing module 4 is arranged inside the shell 1 and can receive the humidity data and the initial detection result and generate compensation correction data; the display screen 7 and the key module 8 are arranged on the same side of the shell 1 and are respectively connected with the data processing module 4, the display screen 7 can display data processed by the data processing module 4, and the key module 8 can select the working mode of the data module; the detection button 6 is arranged on the outer side of the shell 1 and is respectively connected with the optical transceiver 2 and the humidity detection module 5, and the optical transceiver 2 and the humidity detection module 5 can be started to work by pressing the detection button 6; the memory card slot 9 is arranged on the outer side of the shell 1, is connected with the data processing module 4, and can be inserted with an external memory card to store detection data.
When the typical contaminated site soil heavy metal detection system and method based on X-rays work, surface soil of soil to be detected is removed, the humidity detection module 5 is inserted into the soil, the optical transceiver 2 is attached to the surface of the soil, and the humidity detection module 5 and the optical transceiver 2 are started by pressing the detection button 6. The optical transceiver 2 transmits X-rays to soil to be detected and receives a feedback signal of the soil, the feedback signal is transmitted to the component analysis module 3, and the component analysis module 3 obtains an initial soil detection result according to the feedback signal and transmits the result to the data processing module 4; the moisture detection module 5 is capable of detecting soil moisture and communicating the result to the data processing module 4. The data processing module 4 integrates and analyzes the soil humidity with the initial detection result, obtains the accurate values of the types and the contents of the heavy metals in the soil through compensation correction, and transmits the result after the compensation correction to the display screen 7.
Specifically, the component analysis module 3 is provided with a heavy metal species matrix P0 and a heavy metal spectral value matrix Q0:
for the preset heavy metal type matrices P0, P0(P1, P2, P3, … … Pn), where P1 is a first preset type of heavy metal, P2 is a second preset type of heavy metal, P3 is a third preset type of heavy metal, and … … Pn is an nth preset type of heavy metal.
For the predetermined heavy metal spectral value matrices Q0, Q0(Q1, Q2, Q3, … … Qn), wherein Q1 is the first predetermined heavy metal spectral value, Q2 is the second predetermined heavy metal spectral value, Q3 is the third predetermined heavy metal spectral value, and … … Qn is the nth predetermined heavy metal spectral value.
When the detection device is used, the optical transceiver 2 receives feedback rays and then transmits data to the component analysis module 3, when the component analysis module 3 analyzes the feedback rays, the component analysis module 3 can extract a plurality of different spectral values from the feedback rays, each spectral value has a corresponding spectral value Qx, and the Qx is compared with each parameter in the Q0 matrix:
when Qx is Q1, the component analysis module 3 judges that the soil to be detected contains heavy metal P1;
when Qx is Q2, the component analysis module 3 judges that the soil to be detected contains heavy metal P2;
when Qx is Q3, the component analysis module 3 judges that the soil to be detected contains heavy metal P3;
……
when Qx is equal to Qn, the component analysis module 3 determines that the soil to be detected contains the heavy metal Pn.
Specifically, the component analysis module 3 is further provided with a preset number detection matrix group S0(S1, S2, S3,. Sn), where S1 is a first preset type heavy metal detection number matrix, S2 is a second preset type heavy metal detection number matrix, S3 is a third preset type heavy metal detection number matrix, and … … Sn is an nth preset type heavy metal detection number matrix.
The detection quantity matrixes S1, S1 for the first preset kind of heavy metal (S11, S12, S13, … … S1 p);
when the component analysis module 3 analyzes the feedback ray, it can extract a plurality of different spectral values from the feedback ray and detect the area of each spectral value, and the component analysis module 3 compares the area si of each spectral value with the corresponding preset spectral determination area standard value in the S0 matrix, and for the first preset type heavy metal detection quantity matrix S1:
when the area 0 of the first preset heavy metal spectral value Q1 in the spectral values is not less than s1 and less than s11, the component analysis module 3 preliminarily determines that the first preset heavy metal P1 in the soil with detection contains D11;
when the area s11 of the first preset heavy metal spectral value Q1 in the spectral values is not less than s1 and is less than s11, the component analysis module 3 preliminarily determines that the quantity of the first preset heavy metal P1 in the soil to be detected is D12;
when the area s11 of the first preset heavy metal spectrum value Q1 in the spectrum values is not less than s1 and is less than Ss11, the component analysis module 3 preliminarily determines that the first preset heavy metal P1 in the soil with detection contains D13;
……
when the area s1P-1 of the first preset heavy metal spectrum value Q1 in the spectrum values is not less than s1 and is less than s1P, the component analysis module 3 preliminarily determines that the content of the first preset heavy metal P1 in the soil with detection is D1P.
Further, a soil humidity interval matrix R0(R1, R2, R3, … … Rm) is preset in the humidity detection 5 module, where R1 is an interval parameter on a first humidity interval, R2 is an interval parameter on a second humidity interval, R3 is an interval parameter on a third humidity interval, and … … Rm is an interval parameter on an mth humidity interval;
when the component analysis module 3 completes the preliminary analysis of the content of heavy metals in soil, the humidity detection module 5 detects the humidity R of the soil to be detected and compares the humidity R with various parameters in the R0 matrix:
the soil humidity R to be detected and the soil humidity matrix interval R0 can be contrasted, and the range of the soil humidity to be detected is judged:
when R is more than or equal to 0 and less than R1, the humidity detection module 5 judges that the soil humidity to be detected is in a first humidity range;
when R1 is not less than R < R2, the humidity detection module 5 judges that the soil humidity to be detected is in a second humidity range;
……
when Rn-1 is more than or equal to R and less than Rm, the humidity detection module 5 judges that the soil humidity to be detected is in the mth humidity range.
Specifically, the data processing module 4 is provided with a compensation value matrix set CO, CO (C1, C2, C3, … … Cn), where C1 is a first preset compensation value matrix, C2 is a second preset compensation value matrix, C2 is a third preset compensation value matrix, and … … Cn is an nth preset compensation value matrix.
When the data processing module 4 compensates the content value of the first heavy metal P1, the data processing module selects the corresponding compensation value in the C1 matrix to compensate the content value of the first heavy metal P1;
when the data processing module 4 compensates the content value of the second heavy metal P2, the data processing module selects the corresponding compensation value in the C2 matrix to compensate the content value of the second heavy metal P2;
when the data processing module 4 compensates the content value of the third heavy metal P3, the data processing module selects the corresponding compensation value in the C3 matrix to compensate the content value of the third heavy metal P3;
……
when the data processing module 4 compensates the content value of the first kind of heavy metal Pn, the data processing module selects the corresponding compensation value in the Cn matrix to compensate the content value of the nth kind of heavy metal Pn.
Further, for the ith preset offset matrix Ci, i is 1,2, 3.. n, Ci (Ci1, Ci2, Ci 3.. Cim), where Ci1 is the first preset offset of the ith heavy metal, Ci2 is the second preset offset of the ith metal, and … … Cim is the mth preset offset of the ith heavy metal.
When the data processing module 4 compensates the content of the ith heavy metal in the soil to be detected, the data processing module 4 selects a corresponding compensation value from the Ci matrix:
when the soil to be detected is located in a first humidity interval, the data processing module selects Ci1 from the Ci matrix to compensate the content value of the Pi heavy metal;
when the soil to be detected is located in a second humidity interval, the data processing module 4 selects Ci2 from the Ci matrix to compensate the content value of the Pi heavy metal;
……
and when the soil to be detected is located in the mth humidity interval, the data processing module 4 selects Cim from the Ci matrix to compensate the content value of the heavy metal Pi.
Specifically, the data processing module 4 is provided with a compensation correction formula:
Ki＝Dik×Cij
where Ki denotes a corrected value of the heavy metal Pi, Dik denotes an initial detection value of the heavy metal Pi, Ci denotes an offset value of the heavy metal Pi in the j-th humidity range, i is 1,2,3, … … n, j is 1,2,3, … … m, and k is 1,2,3 … … p.
In particular, the key module 8 is able to select the operating mode of the data processing module 4. For example, the humidity range can be manually input, the type of heavy metal to be detected can be selected, and the stored data can be selected.
Specifically, the memory card slot 9 can be inserted with a peripheral memory card, and the detection result is stored in the memory card.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A typical contaminated site soil heavy metal detection system and method based on X-ray is characterized by comprising the following steps:
a housing to protect components loaded therein;
the optical transceiver is arranged at one end of the outer side of the shell and used for transmitting X rays to soil to be detected and collecting feedback rays;
the component analysis module is arranged inside the shell and connected with the optical transceiver, and a preset metal type matrix P0, a preset metal spectral value matrix Q0 and a preset number detection matrix group S0 are arranged in the component analysis module and used for analyzing the feedback rays collected by the optical transceiver and generating an initial detection result;
the data processing module is arranged in the shell and connected with the component analysis module, and a compensation value matrix set CO is arranged in the data processing module and used for correcting the initial detection result;
the humidity detection module is arranged on the outer side of the shell, is positioned on the same side as the optical transceiver, and is internally provided with a humidity interval matrix R0 for detecting the humidity of the soil to be detected;
the detection button is arranged on the outer side of the shell, is respectively connected with the humidity detection module and the optical transceiver and is used for starting the humidity detection module and the optical transceiver;
when the detection device is used, the humidity detection module and the optical transceiver are started by pressing the detection button;
the display screen is arranged on the outer side of the shell, is connected with the data processing module and is used for displaying the detection result corrected by the data processing module;
the key group comprises a plurality of keys, and each key is uniformly arranged on the same side of the shell as the display screen, is respectively connected with the data processing module and is used for selecting the working mode of the data processing module;
and the memory card slot is arranged on the outer side of the shell, is connected with the data processing module and is used for loading an external memory card.
2. The system and the method for detecting the heavy metal in the soil of the typical polluted site based on the X-ray are characterized in that a preset heavy metal type matrix P0 and a preset heavy metal spectral value matrix Q0 are arranged in the component analysis module;
for the preset heavy metal type matrices P0, P0(P1, P2, P3, … … Pn), where P1 is a first preset type of heavy metal, P2 is a second preset type of heavy metal, P3 is a third preset type of heavy metal, and … … Pn is an nth preset type of heavy metal.
For the predetermined heavy metal spectral value matrices Q0, Q0(Q1, Q2, Q3, … … Qn), wherein Q1 is the first predetermined heavy metal spectral value, Q2 is the second predetermined heavy metal spectral value, Q3 is the third predetermined heavy metal spectral value, and … … Qn is the nth predetermined heavy metal spectral value.
When the detection device is used, the optical transceiver receives feedback rays and then transmits data to the component analysis module, when the component analysis module analyzes the feedback rays, the component analysis module can extract a plurality of different spectral values from the feedback rays, each spectral value has a corresponding spectral value Qx, and the Qx is compared with each parameter in the Q0 matrix:
when Qx is Q1, the component analysis module judges that the soil to be detected contains heavy metal P1;
when Qx is Q2, the component analysis module judges that the soil to be detected contains heavy metal P2;
when Qx is Q3, the component analysis module judges that the soil to be detected contains heavy metal P3;
……
and when Qx is equal to Qn, the component analysis module judges that the soil to be detected contains heavy metal Pn.
3. The component analysis module of claim 2, wherein a set of predetermined number detection matrices S0(S1, S2, S3.. Sn) is further provided in the component analysis module, wherein S1 is a first predetermined type heavy metal detection number matrix, S2 is a second predetermined type heavy metal detection number matrix, S3 is a third predetermined type heavy metal detection number matrix, and … … Sn is an nth predetermined type heavy metal detection number matrix.
The detection quantity matrixes S1, S1 for the first preset kind of heavy metal (S11, S12, S13, … … S1 p);
when the component analysis module analyzes the feedback ray, it can extract a plurality of different spectral values from the feedback ray and detect the area of each spectral value, and the component analysis module compares the area si of each spectral value with the corresponding preset spectral determination area standard value in the S0 matrix, and for the first preset type heavy metal detection quantity matrix S1:
when the area 0 of the first preset heavy metal spectral value Q1 in the spectral values is not less than s1 and less than s11, the component analysis module preliminarily judges that the first preset heavy metal P1 in the soil with detection contains D11;
when the area s11 of the first preset heavy metal spectrum value Q1 in the spectrum values is not less than s1 and is less than s11, the component analysis module preliminarily judges that the content of the first preset heavy metal P1 in the soil with detection is D12;
when the area s11 of the first preset heavy metal spectral value Q1 in the spectral values is not less than s1 and is less than S s11, the component analysis module preliminarily judges that the content of the first preset heavy metal P1 in the soil with detection is D13;
……
and when the area s1P-1 of the first preset heavy metal spectral value Q1 in the spectral values is not less than s1 and is less than s1P, the component analysis module preliminarily judges that the first preset heavy metal P1 in the soil with detection contains D1P.
4. The system and the method for detecting the heavy metals in the soil of the typical contaminated site based on the X-ray are characterized in that a soil humidity interval matrix R0(R1, R2, R3, … … Rm) is preset in the humidity detection module, wherein R1 is an interval parameter on a first humidity interval, R2 is an interval parameter on a second humidity interval, R3 is an interval parameter on a third humidity interval, and … … Rm is an interval parameter on an mth humidity interval;
when the component analysis module completes the preliminary analysis of the content of heavy metals in soil, the humidity detection module detects the humidity R of the soil to be detected and compares R with various parameters in the R0 matrix:
the soil humidity R to be detected and the soil humidity matrix interval R0 can be contrasted, and the range of the soil humidity to be detected is judged:
when R is more than or equal to 0 and less than R1, the humidity detection module judges that the soil humidity to be detected is in a first humidity range;
when R1 is not less than R < R2, the humidity detection module judges that the soil humidity to be detected is in a second humidity range;
……
and when Rn-1 is more than or equal to R and less than Rm, the humidity detection module judges that the soil humidity to be detected is in the mth humidity range.
5. The system and method for detecting the heavy metals in the soil of the typical contaminated site based on the X-ray are characterized in that a compensation value matrix set CO and CO (C1, C2, C3 and … … Cn) is arranged in the data processing module, wherein C1 is a first preset compensation value matrix, C2 is a second preset compensation value matrix, C2 is a third preset compensation value matrix, and … … Cn is an nth preset compensation value matrix.
When the data processing module compensates the content value of the first heavy metal P1, the data processing module selects the corresponding compensation value in the C1 matrix to compensate the content value of the first heavy metal P1;
when the data processing module compensates the content value of the second heavy metal P2, the data processing module selects the corresponding compensation value in the C2 matrix to compensate the content value of the second heavy metal P2;
when the data processing module compensates the content value of the third heavy metal P3, the data processing module selects the corresponding compensation value in the C3 matrix to compensate the content value of the third heavy metal P3;
……
when the data processing module compensates the content value of the first kind of heavy metal Pn, the data processing module selects the corresponding compensation value in the Cn matrix to compensate the content value of the nth kind of heavy metal Pn.
6. The X-ray-based soil heavy metal detection system and method for the typical contaminated site based on the claim 5 are characterized in that for the ith preset compensation value matrix Ci, i is 1,2, 3.. n, Ci (Ci1, Ci2, Ci 3.. Cim), wherein Ci1 is the first preset compensation value of the ith heavy metal, Ci2 is the second preset compensation value of the ith heavy metal, and … … Cim is the mth preset compensation value of the ith heavy metal.
When the data processing module compensates the content of the ith heavy metal in the soil to be detected, the data processing module selects a corresponding compensation value from the Ci matrix:
when the soil to be detected is located in a first humidity interval, the data processing module selects Ci1 from the Ci matrix to compensate the content value of the Pi heavy metal;
when the soil to be detected is located in a second humidity interval, the data processing module selects Ci2 from the Ci matrix to compensate the content value of the Pi heavy metal;
……
and when the soil to be detected is positioned in the mth humidity interval, the data processing module selects Cim from the Ci matrix to compensate the content value of the heavy metal Pi.
7. The system and the method for detecting the heavy metal in the soil of the typical polluted site based on the X-ray are characterized in that a compensation and correction formula is arranged in the data processing module:
Ki＝Dik×Cij
where Ki denotes a corrected value of the heavy metal Pi, Dik denotes an initial detection value of the heavy metal Pi, Ci denotes an offset value of the heavy metal Pi in the j-th humidity range, i is 1,2,3, … … n, j is 1,2,3, … … m, and k is 1,2,3 … … p.
8. The system and the method for detecting the heavy metal in the soil of the typical contaminated site based on the X-ray are characterized in that the humidity detection module is provided with a detection rod at the front end, and the detection rod can penetrate into the soil so that the humidity detector can detect the humidity in the soil.
9. The system and method for detecting heavy metals in soil of typical contaminated site based on X-ray according to claim 1, wherein the lower end of the housing is in the shape of a handle.
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