An antenna of a water quality detection sampling device and a water quality detector

Abstract

The application relates to the technical field of water quality detection, and discloses an antenna of a water quality detection sampling device, which comprises a radiation unit layer, a black oil layer, an AD adhesive layer, a polyethylene terephthalate layer, a double-sided adhesive layer and a release paper layer; a feeding point is arranged at the lower part of the radiation unit layer, and the first, second, third and fourth radiation units are connected to the feeding point; and the inductor comprises a first vibrator and a second vibrator. The polyethylene terephthalate layer has the characteristics of low water absorption, corrosion resistance and salt mist resistance, and can effectively inhibit the dielectric constant drift of the antenna; the black oil layer can block external erosion. The radiation unit comprises multiple radiation units, and the feeding points are differentially connected to optimize the energy distribution; the first and second vibrators are adjusted in resonance frequency and impedance matching through the inductive effect, the environmental fluctuation is compensated, and finally, stable signal transmission in a humid, corrosive or salt mist environment is realized. The application further discloses a water quality detector.

Description

Technical Field

[0001] This application relates to the field of water quality testing technology, such as to an antenna and a water quality testing instrument for a water quality sampling device. Background Technology

[0002] Currently, water quality testing is a core component in environmental monitoring, drinking water safety assurance, and industrial wastewater treatment. With the development of intelligent and IoT technologies, traditional manual sampling and testing is gradually upgrading towards automation and remote operation. Water quality testing instruments need to wirelessly upload testing data to a cloud platform in real time to achieve remote monitoring and early warning. In this process, the antenna, as a core component for wireless signal transmission and reception, directly affects the equipment's communication distance, stability, and anti-interference capabilities.

[0003] Water quality testing and sampling equipment is a core tool in fields such as environmental monitoring, industrial water treatment, and drinking water safety assurance. It needs to collect water quality parameters in real time and upload them to the cloud or monitoring center via wireless communication. As the signal bridge for wireless communication, the performance of the antenna directly affects the stability, coverage, and anti-interference capability of data transmission.

[0004] In the process of implementing the embodiments of this disclosure, it has been found that at least the following problems exist in the related technology: water quality testing equipment often operates in humid, corrosive or salt spray environments, the flexible substrate of the antenna has a high water absorption rate, and the dielectric constant is easily drifted due to water vapor penetration, resulting in low antenna radiation efficiency and antenna signal transmission attenuation. Utility Model Content

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides an antenna and a water quality analyzer for a water quality testing and sampling device, in order to solve the problems of high water absorption rate of the flexible substrate of the antenna, easy drift of the antenna dielectric constant due to water vapor penetration, low antenna radiation efficiency, and signal transmission attenuation.

[0007] In some embodiments, the antenna of the water quality testing and sampling device includes: The radiation unit layer includes a first radiating section, a second radiating section, a third radiating section, and a fourth radiating section; A black oil layer is disposed at the lower part of the radiation unit layer; AD adhesive layer is disposed below the black oil layer; A polyethylene terephthalate layer is disposed below the AD adhesive layer; A double-sided adhesive layer is disposed below the polyethylene terephthalate layer; A release paper layer is disposed on the double-sided adhesive layer; A feed point is located at the lower part of the radiating unit layer. The first radiating part is connected to the upper left part of the feed point, the second radiating part is connected to the upper right part of the feed point, the third radiating part is connected to the left side of the feed point, and the fourth radiating part is connected to the right side of the feed point. An inductor includes a first oscillator and a second oscillator, wherein the first oscillator is disposed in the first radiating portion and the second oscillator is disposed in the second radiating portion.

[0008] In some embodiments, the water quality analyzer includes: The antenna of a water quality testing and sampling device described in the foregoing embodiments.

[0009] The antenna and water quality analyzer of the water quality testing sampling device provided in this disclosure can achieve the following technical effects: The antenna of the water quality testing and sampling device provided in this disclosure reduces the problems of low radiation efficiency and signal attenuation caused by high water absorption and dielectric constant drift in the water quality testing environment through multi-layer composite structure design and optimized radiating units. It uses a polyethylene terephthalate layer as the core substrate, which has low water absorption, chemical corrosion resistance, and salt spray resistance, significantly reducing the risk of water vapor penetration and suppressing the root cause of dielectric constant drift from the material end. A black oil layer is placed below the radiating unit layer to further block direct erosion of the radiating unit by external corrosive media or salt spray. An AD adhesive layer serves as an adhesive layer, ensuring tight bonding of each functional layer and preventing structural failure due to interlayer peeling, thus maintaining the overall stability of the antenna. Double-sided adhesive and release paper layers facilitate reliable installation of the antenna on the device, ensuring adaptability to various application scenarios. The radiating element layer adopts a multi-radiating element (first to fourth radiating elements) collaborative design, with the feed point connecting the four radiating elements differently (upper left, upper right, left, and right), which optimizes the radiation pattern and energy distribution and improves the effective radiation efficiency. The setting of the first and second oscillators adjusts the antenna resonant frequency and impedance matching through the inductive effect, further compensating for performance fluctuations caused by environmental factors, and finally achieving stable signal transmission in humid, corrosive or salt spray environments.

[0010] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0011] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is a cross-sectional schematic diagram of the antenna of a water quality testing and sampling device provided in an embodiment of this disclosure; Figure 2 This is an overall schematic diagram of the antenna of a water quality testing and sampling device provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of the antenna radiating section of a water quality testing and sampling device provided in this embodiment; Figure 4 This is a schematic diagram of the structure of an antenna inductor of a water quality testing and sampling device provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of the first radiating part of the antenna of a water quality testing and sampling device provided in this embodiment; Figure 6 This is a schematic diagram of the structure of the second radiating part of the antenna of a water quality testing and sampling device provided in this embodiment; Figure 7 This is a schematic diagram of the structure of the third radiating part of the antenna of a water quality testing and sampling device provided in this embodiment; Figure 8 This is a schematic diagram of the structure of the fourth radiating part of the antenna of a water quality testing and sampling device provided in this embodiment.

[0012] Figure label: 10: Radiation unit layer; 20: Black oil layer; 30: AD adhesive layer; 40: Polyethylene terephthalate layer; 50: Double-sided adhesive layer; 60: Release paper layer; 70: Feed point; 80: Radiation section; 90: Inductor; 100: First radiation section; 110: Second radiation section; 120: Third radiation section; 130: Fourth radiation section; 140: First oscillator; 150: Second oscillator; 160: Connecting wire; 170: First radiation unit; 180: Second radiation unit; 190: Third radiation unit; 200: Fourth radiation unit; 210: Fifth radiation unit; 220: Sixth radiation unit; 230: Seventh radiation unit; 240: Eighth radiation unit; 250: Ninth radiation unit; 260: Tenth radiation unit Radiation unit; 270: Eleventh radiation unit; 280: Twelfth radiation unit; 290: Thirteenth radiation unit; 300: Fourteenth radiation unit; 310: Fifteenth radiation unit; 320: Sixteenth radiation unit; 330: Seventeenth radiation unit; 340: Eighteenth radiation unit; 350: Nineteenth radiation unit; 360: Twentieth radiation unit; 370: Twenty-first radiation unit; 380: Twenty-second radiation unit; 390: Twenty-third radiation unit; 400: Twenty-fourth radiation unit; 410: Twenty-fifth radiation unit; 420: Twenty-sixth radiation unit; 430: Twenty-seventh radiation unit; 440: Twenty-eighth radiation unit; 450: Twenty-ninth radiation unit; 460: Thirtieth radiation unit; Radiation unit; 470: 31st radiation unit; 480: 32nd radiation unit; 490: 33rd radiation unit; 500: 34th radiation unit; 510: 35th radiation unit; 520: 36th radiation unit; 530: 37th radiation unit; 540: 38th radiation unit; 550: 39th radiation unit; 560: 40th radiation unit; 570: 41st radiation unit; 580: 42nd radiation unit; 590: 43rd radiation unit; 600: 44th radiation unit; 610: 45th radiation unit; 620: 46th radiation unit; 630: 47th radiation unit; 640: 48th radiation unit; 650: 49th radiation unit Unit; 660: 50th radiation unit; 670: 51st radiation unit; 680: 52nd radiation unit; 690: 53rd radiation unit; 700: 54th radiation unit; 710: 55th radiation unit; 720: 56th radiation unit; 730: 57th radiation unit; 740: 58th radiation unit; 750: 59th radiation unit; 760: 60th radiation unit; 770: 61st radiation unit; 780: 62nd radiation unit; 790: 63rd radiation unit; 800: 64th radiation unit; 810: 65th radiation unit; 820: 66th radiation unit; 830: 67th radiation unit; 840: 68th radiation unit;850: Radiation Unit 69; 860: Radiation Unit 70; 870: Radiation Unit 71; 880: Radiation Unit 72; 890: Radiation Unit 73; 900: Radiation Unit 74; 910: Radiation Unit 75; 920: Radiation Unit 76; 930: Radiation Unit 77; 940: Radiation Unit 78; 950: Radiation Unit 79; 960: Radiation Unit 80; 970: Radiation Unit 81; 980: Radiation Unit 82; 990: Radiation Unit 83; 1000: Radiation Unit 84; 1010: Radiation Unit 85; 1020: Radiation Unit 86; 1030: Radiation Unit 87; 1040: Radiation Unit 88; 1050: Radiation Unit 89 Radiation unit; 1060: 90th radiation unit; 1070: 91st radiation unit; 1080: 92nd radiation unit; 1090: 93rd radiation unit; 1100: 94th radiation unit; 1110: 95th radiation unit; 1120: 96th radiation unit; 1130: 97th radiation unit; 1140: 98th radiation unit; 1150: 99th radiation unit; 1160: 100th radiation unit; 1170: 101st radiation unit; 1180: 102nd radiation unit; 1190: 103rd radiation unit; 1200: 104th radiation unit; 1210: 105th radiation unit; 1220: 106th radiation unit; 1230: First reinforcement section of inductance; 1240: Second reinforcement section of inductance. Detailed Implementation

[0013] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0014] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0015] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0016] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0017] Unless otherwise stated, the term "multiple" means two or more.

[0018] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0019] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0021] Currently, water quality testing equipment often operates in humid, corrosive, or salt spray environments. The flexible substrate of the antenna has a high water absorption rate and is prone to dielectric constant drift due to water vapor penetration, resulting in low antenna radiation efficiency and signal attenuation.

[0022] Combination Figure 1-4 As shown, this embodiment of the present disclosure provides an antenna for a water quality testing and sampling device, comprising: The radiation unit layer 10 includes a first radiation section 100, a second radiation section 110, a third radiation section 120, and a fourth radiation section 130. Black oil layer 20 is disposed at the lower part of radiation unit layer 10; AD adhesive layer 30 is disposed below black oil layer 20; A polyethylene terephthalate layer 40 is disposed below the AD adhesive layer 30; Double-sided adhesive layer 50 is disposed below polyethylene terephthalate layer 40; Release paper layer 60 is disposed on double-sided adhesive layer 50; Feed point 70 is located at the lower part of radiating unit layer 10. First radiating part 100 is connected to the upper left part of feed point 70, second radiating part 110 is connected to the upper right part of feed point 70, third radiating part 120 is connected to the left side of feed point 70, and fourth radiating part 130 is connected to the right side of feed point 70. The inductor 90 includes a first oscillator 140 and a second oscillator 150, the first oscillator 140 being disposed in the first radiating part 100 and the second oscillator 150 being disposed in the second radiating part 110.

[0023] The antenna of the water quality testing and sampling device provided in this embodiment uses a polyethylene terephthalate (PET) layer 40 as the core substrate. The PET layer 40 has low water absorption, chemical corrosion resistance, and salt spray resistance, significantly reducing the risk of water vapor penetration and suppressing dielectric constant drift from the material end. A black oil layer 20 is disposed below the radiating unit layer to further block direct erosion of the radiating unit by external corrosive media or salt spray. The radiating unit layer 10 is provided with a first radiating unit 100, a second radiating unit 110, a third radiating unit 120, and a fourth radiating unit 13. The differentiated connection of the four radiating elements with the feed point 70 optimizes the antenna radiation pattern and energy distribution, improving the effective radiation efficiency of the antenna. The setting of the first element 140 and the second element 150 adjusts the antenna resonant frequency and impedance matching through the inductive effect, further compensating for antenna performance fluctuations caused by environmental factors. Ultimately, stable signal transmission is achieved in humid, corrosive or salt spray environments. Through multi-layer composite structure design and radiation element optimization, the problems of low antenna radiation efficiency and signal attenuation caused by high water absorption rate and dielectric constant drift in water quality detection environments are reduced.

[0024] Combination Figure 2 and Figure 4 As shown, optionally, the inductor 90 also includes a connecting line 160, which includes a first inductor enhancement portion 1230 and a second inductor enhancement portion 1240. The connecting line 160 is used to connect the first oscillator 140 and the second oscillator 150. The first oscillator 140 is a low-frequency oscillator, and the second oscillator 150 is a high-frequency oscillator.

[0025] In this way, inductor 90 connects the first vibrator 140 and the second vibrator 150 via connecting line 160, forming a dual-frequency radiating unit structure. This allows the antenna to simultaneously cover both low-frequency and high-frequency operating bands, widening the frequency range of the antenna's signal transmission. This adapts to the needs of different communication protocols or sensor data transmission in water quality testing scenarios. Low frequency is used for long-distance penetration transmission, while high frequency is used for high-bandwidth data interaction. When the antenna's transmission performance degrades due to environmental factors causing the antenna's dielectric constant to drift, the other frequency band can still maintain relatively stable radiation efficiency. This reduces the impact of a single frequency band failure on the overall signal transmission, effectively enhancing the antenna's radiation efficiency and reducing signal attenuation.

[0026] The first inductance enhancement section 1230 and the second inductance enhancement section 1240 provided in the connecting line 160 improve the Q value (quality factor) and stability of the inductor through structural optimization of the connecting line 160. In high humidity, corrosive or salt spray environments, ordinary wires are prone to inductance drift due to oxidation and water absorption, which affects the resonant frequency and impedance matching, resulting in reduced antenna radiation efficiency and signal attenuation. The design of the inductance enhancement section effectively suppresses the influence of environmental factors on the inductance parameters, ensuring that the inductor 90 can stably adjust the resonant frequency of the low-frequency and high-frequency vibrators, compensate for the frequency shift caused by dielectric constant drift, maintain the impedance matching state between the antenna and the back-end equipment, thereby enhancing the antenna radiation efficiency and reducing signal reflection and signal transmission attenuation.

[0027] Combination Figure 2 As shown, optionally, the inductance 90 is 7.9nH.

[0028] Thus, the 7.9nH inductance value is the result of simulation and experimental optimization for the antenna's target operating frequency band and current antenna structure. It can compensate for changes in electrical length caused by dielectric constant drift, keeping the resonant frequency stable within the design range. When increased ambient humidity leads to an increase in the dielectric constant of the flexible substrate, the antenna's electrical length will slightly increase, and the original resonant frequency may shift to a lower frequency. The 7.9nH inductance value, by adjusting the reactance parameters, can compensate for this shift, maintaining the accuracy of the resonant frequency and avoiding radiation energy dispersion or reflection loss caused by frequency shift. This reduces the dielectric constant drift phenomenon that easily occurs when water quality testing equipment operates in humid, corrosive, or salt spray environments, enhancing the antenna's radiation efficiency and reducing antenna signal transmission attenuation.

[0029] A 7.9nH inductance value allows for adjustment of the antenna input impedance when connecting low-frequency and high-frequency elements, ensuring good matching with backend equipment under various environmental conditions. When corrosive media cause oxidation and decreased conductivity on the element surface, the equivalent impedance of the element changes. The 7.9nH inductance can dynamically compensate for impedance mismatch by adjusting the inductive reactance component, reducing signal reflection and improving effective radiation efficiency. By precisely matching the resonant frequency and optimizing impedance characteristics, the 7.9nH inductance value effectively suppresses the impact of environmental factors such as dielectric constant drift and corrosion on antenna radiation efficiency, further addressing the issue of signal transmission attenuation.

[0030] Combination Figure 2 and Figure 4 As shown, optionally, the first oscillator 140 and the second oscillator 150 of the inductor 90 are right trapezoids.

[0031] Thus, corrosive media or prolonged damp heat in water quality testing environments can easily lead to oxidation of the oscillator surface and expansion of the substrate, resulting in oscillator deformation, bending, and edge curling, compromising electrical performance consistency. The hypotenuses of the right-angled trapezoidal first oscillator 140 and second oscillator 150 disperse concentrated stress at the oscillator edges along the slope, reducing the risk of localized stress concentration and minimizing changes in electrical length due to deformation. While the right-angled edges of rectangular oscillators are prone to microcracks due to stress concentration, the hypotenuse design slows crack propagation and extends oscillator lifespan. The irregular surface formed by the upper and lower bases and hypotenuses of the right-angled trapezoid, while ensuring effective radiation area, reduces the direct contact area with corrosive media, lowers the electrochemical corrosion rate, and extends the oscillator's lifespan in salt spray environments. This reduces dielectric constant drift that easily occurs in water quality testing equipment operating in humid, corrosive, or salt spray environments, enhancing antenna radiation efficiency and reducing antenna signal transmission attenuation.

[0032] Combination Figure 5As shown, optionally, the first radiating unit 100 includes a first radiating unit 170, a second radiating unit 180, a third radiating unit 190, a fourth radiating unit 200, a fifth radiating unit 210, a sixth radiating unit 220, a seventh radiating unit 230, an eighth radiating unit 240, a ninth radiating unit 250, a tenth radiating unit 260, an eleventh radiating unit 270, a twelfth radiating unit 280, a thirteenth radiating unit 290, a fourteenth radiating unit 300, a fifteenth radiating unit 310, and a tenth radiating unit 320, connected in sequence. The six radiation units 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, and 430 are respectively. The first radiation unit 170 is vertically connected to the feed point 70. The two adjacent radiation units of the first radiation section 100 are perpendicular to each other.

[0033] The vertical connection of adjacent radiating elements creates alternating current paths in the horizontal and vertical directions, generating multi-directional radiation components. This suppresses energy leakage in a single direction. Because corrosive media absorb horizontally polarized signals more strongly, energy is concentrated in the vertical or oblique main lobe direction, improving the antenna's effective radiation efficiency. Even when horizontal losses increase due to salt spray corrosion, the vertical radiating elements maintain high energy transmission efficiency. This reduces dielectric constant drift that easily occurs in water quality testing equipment operating in humid, corrosive, or salt spray environments, enhancing the antenna's radiation efficiency and reducing signal attenuation.

[0034] The 27 vertically connected radiating elements increase the antenna's equivalent electrical length through a segmented extension method. In humid environments, the flexible substrate absorbs water, leading to an increase in dielectric constant and a shortening of the electrical length of a single radiating element. However, the total equivalent electrical length of the multi-element vertical structure can be compensated for by increasing the number of elements, offsetting the electrical length attenuation caused by the increase and maintaining the resonant frequency stable within the design range.

[0035] The size of a single radiating element is small, and its surface area for water absorption is much smaller than that of a single large radiating element. Even if the dielectric constant of a few radiating elements increases locally due to water absorption, the remaining non-water-absorbing radiating elements can still maintain the relative stability of the overall electrical length, avoiding the reduction in radiation efficiency or signal transmission attenuation caused by a sudden drop in antenna performance due to single-point failure.

[0036] The vertical connection of adjacent radiating elements disperses the radial stress generated by the expansion of the substrate due to moisture and heat along the vertical direction, preventing microcracks or warping from occurring in a single element due to stress concentration. While the right-angled edges of rectangular radiating elements are prone to cracking due to stress concentration, the vertically connected zigzag structure distributes stress evenly across multiple elements through stepped extension, extending the mechanical life of the oscillator. This reduces dielectric constant drift that easily occurs in water quality testing equipment operating in humid, corrosive, or salt spray environments, enhancing antenna radiation efficiency and reducing antenna signal transmission attenuation.

[0037] Combination Figure 6 As shown, optionally, the second radiating section includes the following units connected in sequence: the twenty-eighth radiating unit 440, the twenty-ninth radiating unit 450, the thirtieth radiating unit 460, the thirty-first radiating unit 470, the thirty-second radiating unit 480, the thirty-third radiating unit 490, the thirty-fourth radiating unit 500, the thirty-fifth radiating unit 510, the thirty-sixth radiating unit 520, the thirty-seventh radiating unit 530, the thirty-eighth radiating unit 540, the thirty-ninth radiating unit 550, the fortieth radiating unit 560, the forty-first radiating unit 570, and the forty-second radiating unit 570. Radiation units 580, 590, 600, 610, 620, 630, 640, 650, 660, 670, 680, 690, and 700 are located in the second radiating section 110. Radiation unit 440 is vertically connected to the feed point 70. Two adjacent radiation units of the second radiating section 110 are perpendicular to each other.

[0038] The vertical connection of adjacent radiating elements creates alternating current paths in the horizontal and vertical directions, generating multi-directional radiation components. This suppresses energy leakage in a single direction. Because corrosive media absorb horizontally polarized signals more strongly, energy is concentrated in the vertical or oblique main lobe direction, improving the antenna's effective radiation efficiency. Even when horizontal losses increase due to salt spray corrosion, the vertical radiating elements maintain high energy transmission efficiency. This reduces dielectric constant drift that easily occurs in water quality testing equipment operating in humid, corrosive, or salt spray environments, enhancing the antenna's radiation efficiency and reducing signal attenuation.

[0039] The 27 vertically connected radiating elements increase the antenna's equivalent electrical length through a segmented extension method. In humid environments, the flexible substrate absorbs water, leading to an increase in dielectric constant and a shortening of the electrical length of a single radiating element. However, the total equivalent electrical length of the multi-element vertical structure can be compensated for by increasing the number of elements, offsetting the electrical length attenuation caused by the increase and maintaining the resonant frequency stable within the design range.

[0040] The size of a single radiating element is small, and its surface area for water absorption is much smaller than that of a single large radiating element. Even if the dielectric constant of a few radiating elements increases locally due to water absorption, the remaining non-water-absorbing radiating elements can still maintain the relative stability of the overall electrical length, avoiding the reduction in radiation efficiency or signal transmission attenuation caused by a sudden drop in antenna performance due to single-point failure.

[0041] The vertical connection of adjacent radiating elements disperses the radial stress generated by the expansion of the substrate due to moisture and heat along the vertical direction, preventing microcracks or warping from occurring in a single element due to stress concentration. While the right-angled edges of rectangular radiating elements are prone to cracking due to stress concentration, the vertically connected zigzag structure distributes stress evenly across multiple elements through stepped extension, extending the mechanical life of the oscillator. This reduces dielectric constant drift that easily occurs in water quality testing equipment operating in humid, corrosive, or salt spray environments, enhancing antenna radiation efficiency and reducing antenna signal transmission attenuation.

[0042] Combination Figure 7 As shown, optionally, the third radiating unit 120 includes the following units connected in sequence: the fifty-fifth radiating unit 710, the fifty-sixth radiating unit 720, the fifty-seventh radiating unit 730, the fifty-eighth radiating unit 740, the fifty-ninth radiating unit 750, the sixtieth radiating unit 760, the sixty-first radiating unit 770, the sixty-second radiating unit 780, the sixty-third radiating unit 790, the sixty-fourth radiating unit 800, the sixty-fifth radiating unit 810, the sixty-sixth radiating unit 820, the sixty-seventh radiating unit 830, and the sixty-eighth radiating unit 840. 0. Radiation unit 850, radiation unit 860, radiation unit 870, radiation unit 880, radiation unit 890, radiation unit 900, radiation unit 910, radiation unit 920, radiation unit 930, radiation unit 940, radiation unit 950, and radiation unit 960, radiation unit 710 are vertically connected to feed point 70, and two adjacent radiation units of the third radiation section 120 are perpendicular to each other.

[0043] The vertical connection of adjacent radiating elements creates alternating current paths in the horizontal and vertical directions, generating multi-directional radiation components. This suppresses energy leakage in a single direction. Because corrosive media absorb horizontally polarized signals more strongly, energy is concentrated in the vertical or oblique main lobe direction, improving the antenna's effective radiation efficiency. Even when horizontal losses increase due to salt spray corrosion, the vertical radiating elements maintain high energy transmission efficiency. This reduces dielectric constant drift that easily occurs in water quality testing equipment operating in humid, corrosive, or salt spray environments, enhancing the antenna's radiation efficiency and reducing signal attenuation.

[0044] The 26 vertically connected radiating elements increase the antenna's equivalent electrical length through a segmented extension method. In humid environments, the flexible substrate absorbs water, leading to an increase in dielectric constant and a shortening of the electrical length of a single radiating element. However, the total equivalent electrical length of the multi-element vertical structure can be compensated for by increasing the number of elements, offsetting the electrical length attenuation caused by the increase and maintaining the resonant frequency stable within the design range.

[0045] The size of a single radiating element is small, and its surface area for water absorption is much smaller than that of a single large radiating element. Even if the dielectric constant of a few radiating elements increases locally due to water absorption, the remaining non-water-absorbing radiating elements can still maintain the relative stability of the overall electrical length, avoiding the reduction in radiation efficiency or signal transmission attenuation caused by a sudden drop in antenna performance due to single-point failure.

[0046] The vertical connection of adjacent radiating elements disperses the radial stress generated by the expansion of the substrate due to moisture and heat along the vertical direction, preventing microcracks or warping from occurring in a single element due to stress concentration. While the right-angled edges of rectangular radiating elements are prone to cracking due to stress concentration, the vertically connected zigzag structure distributes stress evenly across multiple elements through stepped extension, extending the mechanical life of the oscillator. This reduces dielectric constant drift that easily occurs in water quality testing equipment operating in humid, corrosive, or salt spray environments, enhancing antenna radiation efficiency and reducing antenna signal transmission attenuation.

[0047] Combination Figure 8 As shown, optionally, the fourth radiating unit 130 includes the following units connected in sequence: the eighty-first radiation unit 970, the eighty-second radiation unit 980, the eighty-third radiation unit 990, the eighty-fourth radiation unit 1000, the eighty-fifth radiation unit 1010, the eighty-sixth radiation unit 1020, the eighty-seventh radiation unit 1030, the eighty-eighth radiation unit 1040, the eighty-ninth radiation unit 1050, the ninetieth radiation unit 1060, the ninety-first radiation unit 1070, the ninety-second radiation unit 1080, the ninety-third radiation unit 1090, the ninety-fourth radiation unit 1100, and the ninth... Radiation units 1110 (15th), 1120 (96th), 1130 (97th), 1140 (98th), 1150 (99th), 1160 (100th), 1170 (101st), 1180 (102nd), 1190 (103rd), 1200 (104th), 1210 (105th), and 1220 (106th), and radiation unit 970 (81st) are vertically connected to feed point 70. The two adjacent radiation units of the fourth radiation section 130 are perpendicular to each other.

[0048] The vertical connection of adjacent radiating elements creates alternating current paths in the horizontal and vertical directions, generating multi-directional radiation components. This suppresses energy leakage in a single direction. Because corrosive media absorb horizontally polarized signals more strongly, energy is concentrated in the vertical or oblique main lobe direction, improving the antenna's effective radiation efficiency. Even when horizontal losses increase due to salt spray corrosion, the vertical radiating elements maintain high energy transmission efficiency. This reduces dielectric constant drift that easily occurs in water quality testing equipment operating in humid, corrosive, or salt spray environments, enhancing the antenna's radiation efficiency and reducing signal attenuation.

[0049] The 26 vertically connected radiating elements increase the antenna's equivalent electrical length through a segmented extension method. In humid environments, the flexible substrate absorbs water, leading to an increase in dielectric constant and a shortening of the electrical length of a single radiating element. However, the total equivalent electrical length of the multi-element vertical structure can be compensated for by increasing the number of elements, offsetting the electrical length attenuation caused by the increase and maintaining the resonant frequency stable within the design range.

[0050] The size of a single radiating element is small, and its surface area for water absorption is much smaller than that of a single large radiating element. Even if the dielectric constant of a few radiating elements increases locally due to water absorption, the remaining non-water-absorbing radiating elements can still maintain the relative stability of the overall electrical length, avoiding the reduction in radiation efficiency or signal transmission attenuation caused by a sudden drop in antenna performance due to single-point failure.

[0051] The vertical connection of adjacent radiating elements disperses the radial stress generated by the expansion of the substrate due to moisture and heat along the vertical direction, preventing microcracks or warping from occurring in a single element due to stress concentration. While the right-angled edges of rectangular radiating elements are prone to cracking due to stress concentration, the vertically connected zigzag structure distributes stress evenly across multiple elements through stepped extension, extending the mechanical life of the oscillator. This reduces dielectric constant drift that easily occurs in water quality testing equipment operating in humid, corrosive, or salt spray environments, enhancing antenna radiation efficiency and reducing antenna signal transmission attenuation.

[0052] Combination Figure 3 As shown, optionally, the width of the radiating unit of the first radiating part 100, the second radiating part 110, the third radiating part 120 and the fourth radiating part 130 is 1 mm, and the radiating unit is a single-sided electrolytic copper foil.

[0053] The radiating element width is set to 1mm. Electrical length stability is achieved by controlling the current path length and dispersing environmental stress. In humid or salt spray environments, the flexible substrate absorbs water, leading to an increase in dielectric constant, which shortens the antenna's electrical length. If the radiating element is too wide, the current diffusion range is large, resulting in more significant changes in electrical length, which can easily cause resonant frequency shift, leading to energy dispersion and decreased radiation efficiency. The narrow 1mm width limits the lateral current diffusion of the antenna, concentrating the current more within the radiating element and effectively suppressing the impact of dielectric constant drift on the resonant frequency.

[0054] Narrow-width radiating elements experience less mechanical stress when the flexible substrate is bent or undergoes thermal expansion and contraction. Smaller deformation reduces the risk of microcracks at the element edges, preventing localized conductivity loss due to mechanical damage. Cracks are also less prone to water accumulation and accelerated corrosion, further maintaining the stability of the electrical length.

[0055] The interface characteristics between the single-sided electrolytic copper foil and the lower AD adhesive layer 30 and polyethylene terephthalate layer 40 of the radiating unit directly affect the signal transmission efficiency. The roughened structure on the surface of the electrolytic copper foil forms strong chemical bonds with the highly polar groups of the AD adhesive layer, avoiding signal reflection loss caused by interlayer peeling.

[0056] The 1mm wide radiating unit size ratio allows for a more uniform distribution of radiating units on the polyethylene terephthalate layer 40, reducing impedance mismatch between units caused by uneven local water absorption in the substrate. The uniformly distributed narrow units can average out local fluctuations caused by substrate water absorption, thereby reducing the overall input impedance fluctuation range and significantly improving the matching degree with back-end equipment.

[0057] The radiating element is designed with high conductivity and corrosion resistance of single-sided electrolytic copper foil and a width of 1 mm. By suppressing losses, stabilizing electrical length and optimizing interface matching, it optimizes the problems of low radiation efficiency and signal attenuation caused by dielectric constant drift in humid, corrosive or salt spray environments, and significantly improves the reliability of the antenna in complex environments.

[0058] This disclosure provides a water quality analyzer, including the antenna of a water quality testing sampling device from the aforementioned embodiments.

[0059] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An antenna for a water quality testing and sampling device, characterized in that, include: The radiation unit layer includes a first radiating section, a second radiating section, a third radiating section, and a fourth radiating section; A black oil layer is disposed at the lower part of the radiation unit layer; AD adhesive layer is disposed below the black oil layer; A polyethylene terephthalate layer is disposed below the AD adhesive layer; A double-sided adhesive layer is disposed below the polyethylene terephthalate layer; A release paper layer is disposed on the double-sided adhesive layer; A feed point is located at the lower part of the radiating unit layer. The first radiating part is connected to the upper left part of the feed point, the second radiating part is connected to the upper right part of the feed point, the third radiating part is connected to the left side of the feed point, and the fourth radiating part is connected to the right side of the feed point. An inductor includes a first oscillator and a second oscillator, wherein the first oscillator is disposed in the first radiating portion and the second oscillator is disposed in the second radiating portion.

2. The antenna of a water quality testing and sampling device according to claim 1, characterized in that, The inductor also includes a connecting wire, which includes a first inductance enhancement part and a second inductance enhancement part. The connecting wire is used to connect the first oscillator and the second oscillator, wherein the first oscillator is a low-frequency oscillator and the second oscillator is a high-frequency oscillator.

3. The antenna of a water quality testing and sampling device according to claim 1, characterized in that, The inductance is 7.9nH.

4. The antenna of a water quality testing and sampling device according to claim 3, characterized in that, The first and second oscillators of the inductor are right trapezoids.

5. The antenna of a water quality testing and sampling device according to claim 1, characterized in that, The first radiating section includes a first radiating unit, a second radiating unit, a third radiating unit, a fourth radiating unit, a fifth radiating unit, a sixth radiating unit, a seventh radiating unit, an eighth radiating unit, a ninth radiating unit, a tenth radiating unit, an eleventh radiating unit, a twelfth radiating unit, a thirteenth radiating unit, a fourteenth radiating unit, a fifteenth radiating unit, a sixteenth radiating unit, a seventeenth radiating unit, an eighteenth radiating unit, a nineteenth radiating unit, a twentieth radiating unit, a twenty-first radiating unit, a twenty-second radiating unit, a twenty-third radiating unit, a twenty-fourth radiating unit, a twenty-fifth radiating unit, a twenty-sixth radiating unit, and a twenty-seventh radiating unit connected in sequence. The first radiating unit is vertically connected to the feed point, and two adjacent radiating units of the first radiating section are perpendicular to each other.

6. The antenna of a water quality testing and sampling device according to claim 1, characterized in that, The second radiating section includes a 28th radiating unit, a 29th radiating unit, a 30th radiating unit, a 31st radiating unit, a 32nd radiating unit, a 33rd radiating unit, a 34th radiating unit, a 35th radiating unit, a 36th radiating unit, a 37th radiating unit, a 38th radiating unit, a 39th radiating unit, a 40th radiating unit, a 41st radiating unit, a 42nd radiating unit, a 43rd radiating unit, a 44th radiating unit, a 45th radiating unit, a 46th radiating unit, a 47th radiating unit, a 48th radiating unit, a 49th radiating unit, a 50th radiating unit, a 51st radiating unit, a 52nd radiating unit, a 53rd radiating unit, and a 54th radiating unit connected in sequence. The 28th radiating unit is vertically connected to the feed point, and two adjacent radiating units of the second radiating section are perpendicular to each other.

7. The antenna of a water quality testing and sampling device according to claim 1, characterized in that, The third radiating section includes the following units connected in sequence: the 55th, 56th, 57th, 58th, 59th, 60th, 61st, 62nd, 63rd, 64th, 65th, 66th, 67th, 68th, 69th, 70th, 71st, 72nd, 73rd, 74th, 75th, 76th, 77th, 78th, 79th, and 80th radiating units. The 55th radiating unit is vertically connected to the feed point, and adjacent radiating units of the third radiating section are perpendicular to each other.

8. The antenna of a water quality testing and sampling device according to claim 7, characterized in that, The fourth radiating section includes the following radiating units connected in sequence: the 81st radiating unit, the 82nd radiating unit, the 83rd radiating unit, the 84th radiating unit, the 85th radiating unit, the 86th radiating unit, the 87th radiating unit, the 88th radiating unit, the 89th radiating unit, the 90th radiating unit, the 91st radiating unit, the 92nd radiating unit, the 93rd radiating unit, the 94th radiating unit, the 95th radiating unit, the 96th radiating unit, the 97th radiating unit, the 98th radiating unit, the 99th radiating unit, the 100th radiating unit, the 101st radiating unit, the 102nd radiating unit, the 103rd radiating unit, the 104th radiating unit, the 105th radiating unit, and the 106th radiating unit. The 81st radiating unit is vertically connected to the feed point, and adjacent radiating units of the fourth radiating section are perpendicular to each other.

9. The antenna of a water quality testing and sampling device according to claim 1, characterized in that, The width of the radiating unit in the first, second, third, and fourth radiating sections is 1 mm, and the radiating unit is a single-sided electrolytic copper foil.

10. A water quality analyzer, characterized in that, Includes an antenna for a water quality testing and sampling device as described in any one of claims 1 to 9.

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