Wettability conversion system of sensor for detecting culture medium and use method of wettability conversion system

Abstract

The invention discloses a wettability conversion system of a sensor for detecting a culture medium. The wettability conversion system comprises a wettability conversion box and a multi-parameter wireless sensor, the multi-parameter wireless sensor is inserted into the wettability conversion box to realize wettability conversion; the wettability conversion box is divided into a heating area and a working area through a partition plate, the heating area heats the working area, a connecting top plate used for installing a multi-parameter wireless sensor is arranged at the top of the working area, an inserting hole is formed in the connecting top plate, a positioning groove is formed in one side of the inserting hole, and the positioning groove is matched with the multi-parameter wireless sensor. Therefore, the forward installation of the multi-parameter wireless sensor is ensured. A display screen, operation buttons and a power switch are arranged on the surface of the wettability conversion box. And an observation window is arranged on the surface of the wettability conversion box. A water outlet is formed in the bottom of the working area and connected with a water outlet pipe, and a spraying pipe and an ultraviolet lamp tube are arranged at the top of the working area. The problems that a super-hydrophilic TiO2 electrode is high in preservation cost, and the hydrophilicity is difficult to maintain for a long time in the preservation period are solved.

Description

Technical Field

[0005] The invention belongs to the field of cultivation substrate detection equipment, and in particular relates to a wettability conversion system of a sensor for cultivation substrate detection. Background Art

[0006] Cultivation matrix is ​​one of the basic components of facility agriculture, which can provide necessary support and nutrients for plant growth. The pH value and EC value of the cultivation matrix are usually used to measure the nutrient content of the matrix. The pH value and EC value are affected by the temperature and moisture content of the cultivation matrix. Therefore, modern facility agriculture usually collects multiple cultivation matrix parameters such as pH value, EC value, temperature, moisture content, etc. to comprehensively evaluate the nutrient status of the mechanism, so as to accurately grasp and control the crop cultivation process. The cultivation matrix is ​​a typical heterogeneous system, with a three-phase mixture of solid (matrix particles), liquid (matrix solution), and gas (air in the matrix pores). There are interactions such as liquid penetration and bridging between solid and liquid. After the sensor is inserted into the cultivation matrix, there are multiple contact forms between the sensor and the cultivation matrix, such as solid-solid (electrode and matrix particles), solid-liquid (electrode and matrix solution), and solid-gas (electrode and air in the pores); with the change of the moisture content of the matrix, there is mutual transformation between the multiple contact forms, and the contact state is complex and changeable. Compared with soil, the cultivation matrix has the characteristics of small bulk density, high uniformity of particle size, large porosity, and low air-water ratio, which leads to a more complex contact state between the electrode and the cultivation matrix and a larger detection error of parameters such as pH value.

[0007] The Chinese patent with the announcement number CN112255286B discloses a technical solution for collecting water in the cultivation matrix using super-hydrophilic materials and transporting it around the detection electrode to form a stable and moist detection condition, thereby improving the detection accuracy. The super-hydrophilic TiO2 electrode can obtain a higher detection accuracy in the cultivation matrix than the existing conventional pH electrode. In further research, it was found that the prepared super-hydrophilic TiO2 electrode will undergo a significant and rapid hydrophilic degradation phenomenon during use, which will affect the detection accuracy and response time of the electrode in the cultivation matrix. This is because after the sensor is used, the cultivation matrix particles and organic pollutants are adhered to the electrode surface. At the same time, the super-hydrophilic TiO2 electrode will absorb surrounding moisture, which also includes moisture in the air. In this process, organic pollutants in the air will be adsorbed together on the surface of the TiO2 electrode, resulting in hydrophilic degradation. The above two problems lead to a short service life and difficulty in preservation of the super-hydrophilic TiO2 electrode, and a high comprehensive use cost, which limits its promotion in facility agriculture applications. Hydrophilicity and hydrophobicity are collectively referred to as the wettability of materials. Good hydrophilicity is required during testing, and good hydrophobicity is required during preservation. By effectively converting the wettability, the accuracy of the test can be greatly improved. Summary of the invention

[0008] The purpose of the present invention is to provide a wettability conversion system of a sensor for detecting a cultivation substrate, so as to solve the problem that when using a super-hydrophilic TiO2 electrode to detect a cultivation substrate, the use cost is high and the hydrophilic effect is difficult to ensure.

[0009] In order to solve the above problems, the present invention discloses a wettability conversion system of a sensor for cultivation substrate detection, comprising: a wettability conversion box and a multi-parameter wireless sensor; the multi-parameter wireless sensor is inserted into the wettability conversion box to realize wettability conversion; the wettability conversion box is divided into a heating area and a working area by a partition, the heating area heats the working area, a connecting top plate for installing the multi-parameter wireless sensor is arranged on the top of the working area, an installation hole is arranged on the connecting top plate, a positioning groove is arranged on one side of the installation hole, and the positioning groove cooperates with the multi-parameter wireless sensor to ensure the positive installation of the multi-parameter wireless sensor.

[0010] As a further improvement of the above technical solution:

[0011] The surface of the wettability conversion box is provided with a display screen, operation buttons and a power switch.

[0012] An observation window is arranged on the surface of the wettability conversion box.

[0013] A water outlet is arranged at the bottom of the working area, and a water outlet pipe is connected to the water outlet. A spray pipe and an ultraviolet lamp are arranged at the top of the working area.

[0014] The multi-parameter wireless sensor includes a probe section, a connection section and a control section. The probe section is inserted into the insertion hole. The front end of the probe section is tapered, which is convenient for inserting into the cultivation substrate when in use. The connection section is located between the probe section and the control section to prevent the sensor probe from being placed in the infiltration conversion box during heating, and the heat in the infiltration conversion box damages the sensor control module, so as to improve the durability of the sensor. The probe section includes a first mounting surface and a second mounting surface. The first mounting surface is provided with a first working plate, and the second mounting surface is provided with a second working plate. The first working plate is provided with a super-hydrophilic pH working electrode and a long strip electrode. The two long strip electrodes detect the moisture content of the cultivation substrate by a double electrode method. The second working plate is provided with a reference electrode, a thermistor and a parallel electrode. The super-hydrophilic pH working electrode and the reference electrode cooperate to determine the pH value of the cultivation substrate. Four parallel electrodes are provided at the lower end of the second working plate to detect the EC value of the cultivation substrate by a four-terminal method. The thermistor is used to detect the temperature of the cultivation substrate.

[0015] The upper part of the probe section is provided with a positioning protrusion matched with the positioning groove, a contact flange plate and a connecting boss arranged above the insertion hole, and the connecting boss is connected to the connecting section.

[0016] The connecting section is a hollow structure, comprising a first connecting surface matched with the connecting boss and a second connecting surface matched with the control section, a connecting groove is arranged below the second connecting surface, and a heat insulation cover is arranged in cooperation with the connecting groove.

[0017] The heat insulation cover comprises a mounting groove matched with the connecting groove, and a wire passing hole is arranged in the middle of the heat insulation cover, and the wire passing hole is communicated with the hollow structure.

[0018] The control section includes a cover body and a control module disposed in the cover body. The sensor control module is a saddle-shaped structure. The control module includes an antenna, a sensor signal processing module, a wireless transmission module and a battery compartment. An anti-fool boss is disposed in the cover body, and an anti-fool groove that cooperates with the anti-fool boss is disposed on the control module. An external connection surface and an antenna hole are disposed on the cover body. One end of the antenna extends out of the antenna hole, and a protective cover is installed on the external connection surface. The protective cover is used to protect the antenna. It should be noted that the protective cover is selected from a material that will not affect the antenna data transmission.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] First, the multi-parameter wireless sensor probe of the present invention integrates pH value detection, EC value detection, temperature detection and moisture content detection, realizes simultaneous measurement and correction of four parameters, and improves production efficiency.

[0021] Second, the pH value detection uses a TiO2 working electrode with super-hydrophilic properties. After being inserted into the cultivation matrix, it can gather the surrounding matrix solution, thereby forming a detection environment with abundant water, and the electrode can fully contact the ions in the cultivation matrix. Through the hydrophilic conversion box, before use, the surface of the TiO2 working electrode is converted into a super-hydrophilic surface to improve the detection accuracy and response speed; after use, the surface of the TiO2 working electrode is converted into a hydrophobic surface for easy storage. This not only ensures the accuracy of sensor detection, but also has a lower storage and use cost.

[0022] Third, the use process is convenient. A positioning groove is set on the connecting top plate of the hydrophilic conversion box, and the anti-foolproof boss and anti-foolproof groove of the sensor control module are matched to facilitate operation.

[0023] In summary, the present invention improves the detection accuracy and facilitates the storage of multi-parameter wireless sensors by changing the surface wettability, i.e., hydrophilicity and hydrophobicity, of the super-hydrophilic pH working electrode. It provides a new use and storage idea, which is convenient for storage and can ensure the accuracy of detection, effectively solving the problem of high use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the multi-parameter wireless sensor of the present invention;

[0025] Figure 2 This is a schematic diagram of the control section structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the control module structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the infiltrative conversion box of the present invention;

[0028] Figure 5 This is a schematic diagram of the external structure of the infiltrative conversion box of the present invention;

[0029] Figure 6 It is a schematic diagram of the insertion hole structure of the present invention.

[0030] Figure numerals: 1. multi-parameter wireless sensor; 11. probe section; 111. first mounting surface; 112. second mounting surface; 113. positioning protrusion; 114. contact flange; 115. connecting boss; 12. first working plate; 121. super-hydrophilic pH working electrode; 122. strip electrode; 13. second working plate; 131. reference electrode; 132. temperature sensitive resistor; 133. parallel electrode; 14. connecting section; 141. first connecting surface; 142. second connecting surface; 143. connecting groove; 15. heat insulation cover; 151. mounting groove; 152. wire hole; 16. control section; 161. anti-fool protrusion 1. Table; 162. External connection surface; 163. Antenna hole; 17. Protective cover; 18. Control module; 181. Antenna; 182. Sensor signal processing module; 183. Wireless transmission module; 184. Battery compartment; 185. Foolproofing slot; 2. Infiltration conversion box; 21. Partition; 22. Heating zone; 23. Working zone; 231. Spray pipe; 232. UV lamp; 233. Water outlet; 234. Water outlet pipe; 24. Connecting top plate; 241. Socket hole; 242. Positioning slot; 25. Display screen; 26. Operation button; 27. Observation window; 28. Power switch; 222. Heating plate; 223. Fan. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] This embodiment discloses a multi-parameter sensor for detecting a cultivation medium, which is used to simultaneously measure the pH value, EC value, temperature and moisture content of the cultivation medium.

[0036] like Figures 1 to 3As shown, the multi-parameter wireless sensor 1 includes a probe section 11, a connecting section 14 and a control section 16. The front end of the probe section 11 is tapered, which is convenient for inserting into the cultivation medium when in use. The probe section 11 includes a first mounting surface 111 and a second mounting surface 112. The first mounting surface 111 is provided with a first working plate 12, and the second mounting surface 112 is provided with a second working plate 13. The first working plate 12 is provided with a super-hydrophilic pH working electrode 121 and a long strip electrode 122. The two long strip electrodes 122 are connected by a double electrode The method is used to detect the moisture content of the cultivation substrate; the second working plate 13 is provided with a reference electrode 131, a thermistor 132 and a parallel electrode 133, the reference electrode 131 is an Ag / AgCl reference electrode, the super-hydrophilic pH working electrode 121 is a TiO2 electrode, and the super-hydrophilic pH working electrode 121 and the reference electrode 131 cooperate to determine the pH value of the cultivation substrate; four parallel electrodes 133 are provided at the lower end of the second working plate 13 to detect the EC of the cultivation substrate by the four-terminal method; the thermistor 132 is used to detect the temperature of the cultivation substrate. The upper part of the probe section 11 is provided with a positioning protrusion 113, a contact flange 114 and a connecting boss 115, and the connecting boss 115 is connected to the connecting section 14. The connecting section 14 is a hollow structure, including a first connecting surface 141 that cooperates with the connecting boss 115 and a second connecting surface 142 that cooperates with the control section 16, and a connecting groove 143 is provided below the second connecting surface 142, and the connecting groove 143 is provided with a heat insulation cover 15. The heat-insulating cover 15 includes a mounting groove 151 that cooperates with the connecting groove 143. A wire hole 152 is provided in the middle of the heat-insulating cover 15, and the wire hole 152 is connected to the hollow structure. The control section 16 includes a cover body and a control module 18 disposed in the cover body. The sensor control module 18 is a saddle-shaped structure. The control module 18 includes an antenna 181, a sensor signal processing module 182, a wireless transmission module 183 and a battery compartment 184; an anti-fool boss 161 is provided in the cover body, and an anti-fool groove 185 that cooperates with the anti-fool boss 161 is provided on the control module 18. An external connection surface 162 and an antenna hole 163 are provided on the cover body. One end of the antenna 181 extends out of the antenna hole 163, and a protective cover 17 is installed on the external connection surface 162. The cooperation between the anti-fool boss 161 and the anti-fool groove 185 can ensure the accuracy of installation.

[0037] like Figures 4 to 6 As shown, the conversion system of this embodiment includes: an invasive conversion box 2 and a multi-parameter wireless sensor 1; the invasive conversion is achieved by inserting the multi-parameter wireless sensor 1 into the invasive conversion box 2; the invasive conversion box 2 is divided into a heating zone 22 and a working zone 23 by a partition 21, the heating zone 22 heats the working zone 23, a heating plate 222 and a fan 223 are arranged on the inner wall of the heating zone 23, a water outlet 233 is arranged at the bottom of the working zone 23, the water outlet 233 is connected to a water outlet pipe 234, and a spray pipe 231 and an ultraviolet lamp tube 232 are arranged at the top of the working zone 23.

[0038] A connecting top plate 24 for installing the multi-parameter wireless sensor 1 is provided on the top of the working area 23. An insertion hole 241 is provided on the connecting top plate 24. A positioning groove 242 is provided on one side of the insertion hole 241. The positioning groove 242 cooperates with the multi-parameter wireless sensor 1 to ensure the positive installation of the multi-parameter wireless sensor 1.

[0039] A display screen 25 , operation buttons 26 , and a power switch 28 are provided on the surface of the invasive conversion box 2 .

[0040] The surface of the wettability conversion box 2 is provided with an observation window 27, which is convenient for the user to observe the internal state during use.

[0041] This embodiment discloses a method for using a wettability conversion system of a sensor for detecting a cultivation substrate, comprising the following steps:

[0042] After the detection is completed, the multi-parameter wireless sensor 1 is inserted into the infiltration conversion box 2, and the spray pipe 231 is opened to rinse the probe section 11 first, and clean the large pollutants such as the cultivation matrix particles that stick to the electrode surface; then the heating area 22 is heated to 250°C for 2 hours. On the one hand, high temperature will promote the decomposition of organic pollutants adsorbed on the electrode surface; on the other hand, under high temperature, the oxygen atom vacancies inside TiO2 are filled, and the surface of the super-hydrophilic pH working electrode 121 is hydrophobic. At this time, the electrode has self-cleaning properties, and it is difficult for moisture in the air to gather on the electrode surface, so the electrode can be prevented from being contaminated by organic matter in the air during long-term storage. The sensor can be stored for a long time under non-vacuum conditions.

[0043] Before detection, the multi-parameter wireless sensor 1 is inserted into the infiltration conversion box 2, the ultraviolet lamp 232 is turned on, and the ultraviolet light is used to irradiate the super-hydrophilic pH working electrode 121. On the one hand, ultraviolet light irradiation can destroy organic matter on the electrode surface, and on the other hand, oxygen atom vacancies can appear on the TiO2 surface, making the super-hydrophilic pH working electrode 121 hydrophilic, which can gather moisture in the cultivation matrix and improve the detection accuracy and response speed.

[0044] The present invention improves the detection accuracy and facilitates the storage of multi-parameter wireless sensors by changing the hydrophilicity and hydrophobicity of the surface of the super-hydrophilic pH working electrode, providing a new use and storage idea that is convenient for storage and can ensure the detection accuracy.

[0045] The above is only an embodiment of the present invention, and the common sense such as the known specific structure and characteristics in the scheme is not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A wettability conversion system for a sensor for detecting a cultivation medium, characterized in that: include: A wettability conversion box (2) and a multi-parameter wireless sensor (1); the multi-parameter wireless sensor (1) is inserted into the wettability conversion box (2) to achieve wettability conversion; the wettability conversion box (2) is divided into a heating area (22) and a working area (23) by a partition (21); the heating area (22) heats the working area (23); a connecting top plate (24) for installing the multi-parameter wireless sensor (1) is arranged on the top of the working area (23); an insertion hole (241) is arranged on the connecting top plate (24); a positioning groove (242) is arranged on one side of the insertion hole (241); the positioning groove (242) cooperates with the multi-parameter wireless sensor (1) to ensure the positive installation of the multi-parameter wireless sensor (1).

2. The wettability conversion system of the sensor for detecting the cultivation medium according to claim 1, characterized in that: The surface of the wettability conversion box (2) is provided with a display screen (25), operation buttons (26), and a power switch (28).

3. The wettability conversion system of the sensor for detecting the cultivation medium according to claim 1 or 2, characterized in that: An observation window (27) is provided on the surface of the wettability conversion box (2).

4. The wettability conversion system of the sensor for detecting the cultivation medium according to claim 3, characterized in that: A water outlet (233) is provided at the bottom of the working area (23), and the water outlet (233) is connected to a water outlet pipe (234). A spray pipe (231) and an ultraviolet lamp tube (232) are provided at the top of the working area (23).

5. The wettability conversion system of the sensor for cultivation medium detection according to claim 4, characterized in that: The multi-parameter wireless sensor (1) comprises a probe section (11), a connecting section (14) and a control section (16); the probe section (11) is inserted into an insertion hole (241); the probe section (11) comprises a first mounting surface (111) and a second mounting surface (112); a first working plate (12) is arranged on the first mounting surface (111); a second working plate (13) is arranged on the second mounting surface (112); an ultra-hydrophilic pH working electrode (121) and a long strip electrode (13) are arranged on the first working plate (12); 22), two of the long strip electrodes (122) detect the moisture content of the cultivation substrate by a double electrode method; the second working plate (13) is provided with a reference electrode (131), a thermistor (132) and a parallel electrode (133), and the super-hydrophilic pH working electrode (121) and the reference electrode (131) cooperate to measure the pH value of the cultivation substrate; four of the parallel electrodes (133) are arranged at the lower end of the second working plate (13) to detect the EC value of the cultivation substrate by a four-terminal method; the thermistor (132) is used to detect the temperature of the cultivation substrate.

6. The wettability conversion system of the sensor for detecting the cultivation medium according to claim 5, characterized in that: The upper part of the probe section (11) is provided with a positioning protrusion (113) matched with the positioning groove (242), a contact flange (114) arranged above the insertion hole (241) and a connecting boss (115), and the connecting boss (115) is connected to the connecting section (14).

7. The wettability conversion system of the sensor for detecting the cultivation medium according to claim 6, characterized in that: The connecting section (14) is a hollow structure, comprising a first connecting surface (141) cooperating with the connecting boss (115) and a second connecting surface (142) cooperating with the control section (16); a connecting groove (143) is provided below the second connecting surface (142); and a heat insulating cover (15) is provided in cooperation with the connecting groove (143).

8. The wettability conversion system of the sensor for detecting the cultivation medium according to claim 7, characterized in that: The heat insulation cover (15) comprises a mounting groove (151) matched with the connecting groove (143), and a wire passing hole (152) is provided in the middle of the heat insulation cover (15), and the wire passing hole (152) is communicated with the hollow structure.

9. The wettability conversion system of the sensor for detecting the cultivation medium according to claim 8, characterized in that: The control section (16) comprises a cover body and a control module (18) arranged in the cover body, the control module (18) is a saddle-shaped structure, and comprises an antenna (181), a sensor signal processing module (182), a wireless transmission module (183) and a battery compartment (184); an anti-foolproofing boss (161) is arranged in the cover body, and an anti-foolproofing groove (185) cooperating with the anti-foolproofing boss (161) is arranged on the control module (18); an external connection surface (162) and an antenna hole (163) are arranged on the cover body, one end of the antenna (181) protrudes from the antenna hole (163), and a protective cover (17) is installed on the external connection surface (162).

10. A method for using the wettability conversion system based on the cultivation medium detection sensor according to claim 9, characterized in that: The following steps are involved: Before detection, the multi-parameter wireless sensor (1) is inserted into the wettability conversion box (2), the ultraviolet lamp (232) is turned on, and the ultraviolet light is used to irradiate the super-hydrophilic pH working electrode (121), so that the super-hydrophilic pH working electrode (121) has hydrophilicity, can gather water in the cultivation matrix, and improve the detection accuracy and response speed; After the detection is completed, the multi-parameter wireless sensor (1) is inserted into the wettability conversion box (2), and the spray pipe (231) is opened to first rinse the probe section (11), and then heated by the heating zone (22) so that the temperature of the working zone (23) is heated to 250° C. for 2 hours, so that the surface of the super-hydrophilic pH working electrode (121) is converted into hydrophobicity, which has self-cleaning properties and is convenient for storing the sensor under normal conditions.

Images