CN212459473U - Monitoring alarm device for detecting turbidity and heavy metal element content in water - Google Patents
Monitoring alarm device for detecting turbidity and heavy metal element content in water Download PDFInfo
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- CN212459473U CN212459473U CN202021739005.3U CN202021739005U CN212459473U CN 212459473 U CN212459473 U CN 212459473U CN 202021739005 U CN202021739005 U CN 202021739005U CN 212459473 U CN212459473 U CN 212459473U
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Abstract
The utility model discloses a detection monitoring alarm device for turbidity and heavy metal element content in water, which belongs to the field of water quality detection. The device comprises a detection pool, a turbidity detection module, a heavy metal detection module, a data processing module, a single-chip microcomputer alarm module and a power supply module. The utility model discloses a realize heavy metal element's detection through the small-size nuclear magnetic resonance model of design. The nuclear magnetic resonance technology analyzes the structure of a substance by utilizing the characteristic that the substance can go deep into the substance without damaging the detected substance, particularly, the structural information of the substance is obtained through the energy change of atomic nuclei in a magnetic field, and the method has the advantages of high resolution, rapidness, no damage to a sample and the like.
Description
Technical Field
The utility model relates to a water sample detection field, in particular to aquatic turbidity and heavy metal element content detection monitoring alarm device.
Background
The living organisms and the human production all need water, the requirements of different purposes on water quality are different, particularly under the current social background that the ecological benefits are higher than all social backgrounds, objective, scientific and systematic water quality evaluation is necessary, water resource pollution is reasonably planned and prevented to meet the requirements of industrial water, agricultural water, domestic water, environmental water and ecological water, and the sustainable utilization of water resources and the sustainable development of social economy can be realized only if the supply and demand of the water resources are balanced.
The turbidity of water and the content of heavy metal elements (such as lead, cadmium, arsenic, chromium, mercury and thallium) are two important indexes in water quality evaluation, the domestic turbidity measuring device mainly has the defects of limited measuring range, larger power consumption, inconvenient carrying and the like, and foreign instruments have higher import cost and higher consumption, so the technology can be improved on the basis of the existing instruments to provide the turbidity measuring device with strong practicability, high accuracy and wide measuring range. The pollution of heavy metal elements is increasingly severe along with the industrial development situation, the content of the heavy metal elements in a water body is low and difficult to measure, the currently common methods comprise a micro-spectrum analysis (MS), an Atomic Absorption Spectroscopy (AAS), an ultraviolet spectrophotometry (UV), an inductively coupled plasma mass spectrometry (ICP-MS) and the like, the methods are widely applied at home and abroad, but the heavy metal detection is a long-term work, and the detection method with higher sensitivity, better accuracy and higher speed is always the target pursued at the present stage.
Disclosure of Invention
To prior art not enough, the utility model provides an aquatic turbidity and heavy metal element content detection monitoring alarm device based on nuclear magnetic resonance technique carries out on-line analysis, sensitivity, stability, reproducibility to quality of water heavy metal.
In order to achieve the above object, the utility model provides a following technical scheme: a monitoring alarm device for detecting turbidity and heavy metal element content in water comprises the following parts:
a detection cell;
the turbidity detection module mainly comprises a light source and a silicon photocell, wherein the silicon photocell is positioned right opposite to the light source, and the connection line of the silicon photocell and the silicon photocell passes through the axis of the detection cell;
the heavy metal detection module mainly comprises a magnet unit, an induction coil, a nuclear magnetic resonance probe, a radio frequency transmitter, an IV amplifier, an oscilloscope and a detector, wherein the induction coil is positioned at the position where the magnet unit generates a uniform magnetic field, the detection pool is positioned at the central position of the induction coil, the radio frequency transmitter is positioned at one end of the detection pool, a pulse signal generated by the radio frequency transmitter is transmitted to the IV amplifier after being interfered by the detection pool and the magnetic field, is detected by the detector and is finally displayed on the oscilloscope;
the data processing module is in communication connection with the turbidity detection module and the heavy metal detection module and is used for analyzing and calculating signals transmitted by the turbidity detection module and the heavy metal detection module to obtain detection values of turbidity and heavy metal in water;
the singlechip alarm module is in communication connection with the data processing module and alarms when the turbidity in water and the content of heavy metal exceed the standard;
and the power supply module is electrically connected with the turbidity detection module, the heavy metal detection module, the data processing module and the single chip microcomputer alarm module.
Further, the magnet units are placed in a Halbach magnet arrangement.
Furthermore, the magnet unit consists of an upper layer magnetic strip, a middle layer magnetic strip and a lower layer magnetic strip.
Furthermore, the length of the upper layer magnetic strip and the length of the lower layer magnetic strip are both 10cm, the length of the middle layer magnetic strip is 5cm, and the distance between the layers is 2 cm.
Further, the magnetic field strength of the magnetic field unit is 51.35 mT.
Further, the light source in the turbidity detection module is a green light source with the wavelength of 532nm and the power of 30 mw.
Further, the single chip microcomputer alarm module is a TX-1C type 51 single chip microcomputer.
Furthermore, the device also comprises a control system for controlling the running states of the turbidity detection module, the heavy metal detection module, the data processing module, the single-chip microcomputer alarm module and the power supply module.
Compared with the prior art, the utility model discloses following beneficial effect has: (1) the utility model discloses a carry out on-line measuring to aquatic heavy metal based on nuclear magnetic resonance technique, the nuclear magnetic resonance wave spectrum that produces is also different in the nuclear kernel number difference of different heavy metal elements, consequently detects when this method can realize the multiple heavy metal element of quality of water. No chemical reagent is needed, so that the maintenance cost is reduced, and the problem of secondary pollution of the chemical reagent is avoided;
(2) the utility model discloses a nuclear magnetic resonance detection technique be nondestructive test method, compare with current mainstream method and can retrieve the test sample, be convenient for realize the recovery, the retention and the laboratory reinspection of same sample.
Drawings
FIG. 1 is a schematic view of a turbidity and heavy metal element content detection monitoring alarm device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a turbidity detecting apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a heavy metal detection module according to an embodiment of the present invention;
fig. 4 is a light color comparison test result of the turbidity detecting apparatus according to the embodiment of the present invention;
fig. 5 is a schematic view of a magnet unit of an embodiment of the invention;
fig. 6 is a graph of magnetic field strength distribution according to an embodiment of the present invention;
wherein: 1-a detection pool, 2-a turbidity detection module, 3-a heavy metal detection module, 301-a magnet unit, 302-an induction coil, 303-a nuclear magnetic resonance probe, 304-a radio frequency transmitter, 305-an IV amplifier, 306-an oscilloscope, 307-a detector, 4-a data processing module, 5-a singlechip alarm module and 6-a power supply module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details or with a specific form described.
Principle of turbidity detection
Turbidity represents the obstruction (including scattering and absorption) of transmitted light by cementitious substances and other suspended solid particles in water. In the test of light transmission through water, the attenuation of the transmitted light follows lambert beer's law, and based on the principle, the following turbidity formula (1) is easily derived by taking a silicon photodiode with good linearity as a photoelectric conversion material:
wherein T is the turbidity to be measured of the water sample, P0K, K for incident light intensity1The coefficient (which can be calibrated by formalin turbidity standard solution) is shown in FIG. 2, wherein P is the transmitted light intensity.
Principle of heavy metal detection
The utility model discloses a realize heavy metal element's detection through the small-size nuclear magnetic resonance model of design. The nuclear magnetic resonance technology analyzes the structure of a substance by utilizing the characteristic that the substance can go deep into the substance without damaging the detected substance, particularly, the structural information of the substance is obtained through the energy change of atomic nuclei in a magnetic field, and the method has the advantages of high resolution, rapidness, no damage to a sample and the like. The proton in the atom generates spinning movement, under the normal state, the proton is in the random thermal movement state, under the action of an external steady magnetic field, the proton and the external magnetic field form a certain angle, the atomic nucleus starts to have magnetism, and energy level splitting occurs under the action of the magnetic field, under the action of an external radio frequency, resonance transition occurs between nuclear energy levels, the radio frequency is removed, the atomic nucleus is restored to the ground state from the excited state, and the induction coil generates induction current in the process. If the applied radio frequency is changed periodically, the induced current will also be periodic, and the current is converted and transmitted to the detector through the IV amplifier, and is connected with the oscillograph device to form a periodic wave. The nuclear magnetic resonance spectra produced differ in the number of nuclei in each atom. Measuring the characteristic spectrum corresponding to each element, establishing a database, and determining the types and the contents of the heavy metal elements in the water quality through comparison with the database.
Referring to fig. 1, the utility model provides a detection monitoring alarm device for turbidity and heavy metal element content in water, including following several parts:
a detection cell 1;
the turbidity detection module 2 mainly comprises a light source and a silicon photocell (not shown in the figure), wherein the silicon photocell is positioned right opposite to the light source, and the connection line of the silicon photocell and the silicon photocell passes through the axis of the detection cell 1;
the heavy metal detection module 3 mainly comprises a magnet unit 301, an induction coil 302, a nuclear magnetic resonance probe 303, a radio frequency transmitter 304, an IV amplifier 305, a detector 306 and an oscilloscope 307, wherein the induction coil 302 is located at a position where the magnet unit 301 generates a uniform magnetic field, the detection cell 1 is located at the center of the induction coil 302, the radio frequency transmitter 304 is located at one end of the detection cell 1, a pulse signal generated by the radio frequency transmitter 304 is transmitted to the IV amplifier 305 after being interfered by the detection cell 2 and the magnetic field, is detected by the detector 306, and is finally displayed on the oscilloscope 307 (see fig. 3);
the data processing module 4 is in communication connection with the turbidity detection module 2 and the heavy metal detection module 3, and is used for analyzing and calculating signals transmitted by the turbidity detection module 2 and the heavy metal detection module 3 to obtain detection values of turbidity and heavy metal in water;
the singlechip alarm module 5 is in communication connection with the data processing module 4 and alarms when the turbidity in the water and the content of heavy metals exceed the standard;
and the power supply module 6 is electrically connected with the turbidity detection module 2, the heavy metal detection module 3, the data processing module 4 and the singlechip alarm module 5.
Because the nuclear magnetic resonance phenomenon is more obvious under the conditions of high uniformity of the permanent magnetic field and high magnetic field intensity, the signal is more easily shown. In this embodiment, the magnetic field unit 301 is placed in a Halbach magnet arrangement manner, that is, the magnet area is divided into three layers in a layered arrangement manner, the arrangement structure is as shown in fig. 5, wherein the lengths of the upper and lower layers of magnetic strips are 10cm, the length of the middle layer of magnetic strip is 5cm, and the distance between the layers is 2 cm. By Ansys modeling analysis, there is a spherical shim region of 100mm diameter in the central region with 99% homogeneity and a field strength of 51.35mT (see fig. 6). In this embodiment, an aluminum frame is used as the magnetic field bearing frame, and the inner diameter of the aluminum frame is 125 mm.
In this embodiment, the red light with a wavelength of 650nm and the blue light with a wavelength of 405nm are used to detect samples with different turbidities, and as shown in fig. 4, it is obvious that the red light has a strong penetration ability, the sensitivity is low for samples with low turbidities, the blue light has a weak penetration ability, the samples with a large turbidities cannot be detected, and the red light and the blue light are well matched in a region with a moderate turbidities. Based on the analysis of the above experimental results, a green light source with a wavelength of 532nm and a power of 30mw was selected as the light source of the turbidity detecting module 2.
According to GB 5749 sanitary Standard for Drinking Water issued by China in 2006, the turbidity of drinking water must not exceed 1 NTU. In addition, the existence of heavy metal elements and other harmful elements in water can be considered to be harmful to human health. Based on the two indexes, the device adopts a TX-1C type 51 single chip microcomputer to realize the alarm function. When any index of turbidity and heavy metal content is not satisfactory, the single chip microcomputer indicator light flickers and gives out an alarm sound.
In addition, the device also comprises a control system (not shown in the figure) for controlling the running states of the turbidity detection module 2, the heavy metal detection module 3, the data processing module 4, the singlechip alarm module 5 and the power supply module 6.
In order to verify the reliability of the device, the turbidity and heavy metal detection is carried out on a water sample, and specific results are shown in table 1.
TABLE 1 Water turbidity measurement data
According to the results, the absolute error between the turbidity value and the true value detected by the device is small (the absolute value is between 0.1 and 0.8), the actual requirement is met, and the device can be used for field detection.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to the above-described embodiments may be made, and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications to the present invention according to the disclosure of the present invention within the protection scope of the present invention.
Claims (8)
1. The utility model provides a detection monitoring alarm device of aquatic turbidity and heavy metal element content which characterized in that includes following several parts:
a detection cell;
the turbidity detection module mainly comprises a light source and a silicon photocell, wherein the silicon photocell is positioned right opposite to the light source, and the connection line of the silicon photocell and the silicon photocell passes through the axis of the detection cell;
the heavy metal detection module mainly comprises a magnet unit, an induction coil, a nuclear magnetic resonance probe, a radio frequency transmitter, an IV amplifier, an oscilloscope and a detector, wherein the induction coil is positioned at the position where the magnet unit generates a uniform magnetic field, the detection pool is positioned at the central position of the induction coil, the radio frequency transmitter is positioned at one end of the detection pool, a pulse signal generated by the radio frequency transmitter is transmitted to the IV amplifier after being interfered by the detection pool and the magnetic field, is detected by the detector and is finally displayed on the oscilloscope;
the data processing module is in communication connection with the turbidity detection module and the heavy metal detection module and is used for analyzing and calculating signals transmitted by the turbidity detection module and the heavy metal detection module to obtain detection values of turbidity and heavy metal in water;
the singlechip alarm module is in communication connection with the data processing module and alarms when the turbidity in water and the content of heavy metal exceed the standard;
and the power supply module is electrically connected with the turbidity detection module, the heavy metal detection module, the data processing module and the single chip microcomputer alarm module.
2. The device for detecting, monitoring and alarming turbidity and content of heavy metal elements in water according to claim 1, wherein the magnet units are arranged in a Halbach magnet arrangement mode.
3. The device for detecting, monitoring and alarming turbidity and content of heavy metal elements in water as claimed in claim 2, wherein the magnet unit is composed of an upper layer magnetic strip, a middle layer magnetic strip and a lower layer magnetic strip.
4. The device for detecting, monitoring and alarming turbidity in water and content of heavy metal elements according to claim 3, wherein the lengths of the upper layer magnetic strip and the lower layer magnetic strip are both 10cm, the length of the middle layer magnetic strip is 5cm, and the distance between the layers is 2 cm.
5. The device for detecting, monitoring and alarming turbidity and content of heavy metal elements in water as claimed in claim 4, wherein the magnetic field intensity of the magnetic field unit is 51.35 mT.
6. The device for detecting, monitoring and alarming turbidity and content of heavy metal elements in water according to claim 1, wherein the light source in the turbidity detection module is a green light source with a wavelength of 532nm and a power of 30 mw.
7. The device for detecting, monitoring and alarming turbidity and content of heavy metal elements in water as claimed in claim 1, wherein the single chip microcomputer alarming module is a TX-1C type 51 single chip microcomputer.
8. The device for detecting, monitoring and alarming turbidity and content of heavy metal elements in water according to claim 1, further comprising a control system for controlling the running states of the turbidity detection module, the heavy metal detection module, the data processing module, the single chip microcomputer alarm module and the power supply module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021739005.3U CN212459473U (en) | 2020-08-19 | 2020-08-19 | Monitoring alarm device for detecting turbidity and heavy metal element content in water |
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| CN202021739005.3U CN212459473U (en) | 2020-08-19 | 2020-08-19 | Monitoring alarm device for detecting turbidity and heavy metal element content in water |
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| CN202021739005.3U Expired - Fee Related CN212459473U (en) | 2020-08-19 | 2020-08-19 | Monitoring alarm device for detecting turbidity and heavy metal element content in water |
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