High-temperature-resistant soil temperature and humidity sensor for rice planting

Abstract

The utility model discloses a kind of soil temperature and humidity sensors for high-temperature-resistant rice planting, belong to temperature and humidity sensor technical field.The utility model of a kind of soil temperature and humidity sensors for high-temperature-resistant rice planting, including sensor main body, horizontal positioning disc and auxiliary mounting rod, the bottom of the sensor main body is connected with three different lengths of stainless steel probe, its inside is equipped with multichannel signal processing circuit, for synchronously or sequentially collecting the temperature and humidity signal of each probe.The utility model of a kind of soil temperature and humidity sensors for high-temperature-resistant rice planting, by integrating three different lengths of probe on the same sensor main body, and cooperate with horizontal and vertical positioning mechanism, can be disposable, synchronously measure the temperature and humidity data of multiple key depths such as ground surface, root layer, provide comprehensive, reliable decision basis for irrigation;Horizontal positioning disc with level is set, and installation reference surface level is ensured from source.

Description

Technical Field

[0001] This utility model relates to the field of temperature and humidity sensor technology, and more specifically, to a high-temperature resistant soil temperature and humidity sensor for rice cultivation. Background Technology

[0002] In rice cultivation environments characterized by high temperature, high humidity, and periodic flooding, the hydrothermal conditions of the soil exhibit significant differences across its vertical profile: the surface layer (0-5cm) is affected by sunlight and evaporation, resulting in drastic fluctuations in temperature and humidity; while the temperature and humidity of the main root activity layer (e.g., 10-25cm) remain relatively stable, directly impacting rice's water absorption and healthy growth. Currently, most commercially available soil temperature and humidity sensors are single-point measurements, typically acquiring data only at a specific depth, failing to comprehensively reflect changes in the hydrothermal gradient of the soil profile. Paddy field soil is soft and muddy, making it difficult to insert traditional probe-type sensors vertically and stably to the predetermined depth. These sensors are prone to tilting, floating, or sinking, leading to inaccurate depth measurements, poor data representativeness, and long-term monitoring point displacement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a high-temperature resistant soil temperature and humidity sensor for rice cultivation to solve the above-mentioned deficiencies.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] This utility model discloses a soil temperature and humidity sensor for high-temperature rice cultivation, comprising a sensor body, a horizontal positioning disk, and an auxiliary mounting rod. The bottom of the sensor body is connected to three stainless steel probes of different lengths, and the sensor body is equipped with a multi-channel signal processing circuit for synchronously or sequentially acquiring the temperature and humidity signals of each probe. The horizontal positioning disk has insertion holes adapted to the number and position of the stainless steel probes. A positioning sleeve is fixedly installed at the lower end of the insertion hole, and the stainless steel probes are vertically inserted into the insertion hole and sleeved with the positioning sleeve.

[0006] Preferably, a level is provided at the center of the horizontal positioning disk.

[0007] Preferably, the horizontal positioning disk is further provided with multiple positioning holes, and a protective cover is fixed to the horizontal positioning disk through the positioning holes. The protective cover covers the sensor body, and the edge of the protective cover is provided with mounting ears.

[0008] Preferably, the auxiliary mounting rod includes a first insert rod, a second insert rod, and a third insert rod, with each insert rod having a matching first and second insertion end at its end, and the connection or separation is achieved by rotation locking.

[0009] Preferably, the first plug-in end is provided with a locking slider, and the second plug-in end is provided with a communicating longitudinal groove and a transverse locking groove; when connected, the locking slider slides in along the longitudinal groove and is locked into the end of the transverse locking groove after being rotated.

[0010] Preferably, the auxiliary mounting rod further includes a positioning cover connected to the first insertion rod, the second insertion rod, and the third insertion rod.

[0011] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0012] This utility model discloses a high-temperature resistant soil temperature and humidity sensor for rice cultivation. By integrating three probes of different lengths onto the same sensor body and cooperating with horizontal and vertical positioning mechanisms, it can simultaneously measure temperature and humidity data at multiple key depths, including the soil surface and root zone, providing a comprehensive and reliable basis for irrigation decisions. A horizontal positioning disc with a level ensures the installation reference surface is level from the outset. A detachable auxiliary mounting rod can pre-drill vertical guide holes in the soil matching the probe size, greatly reducing the resistance to direct probe insertion and effectively preventing probe bending or tilting, ensuring that each probe accurately reaches the preset depth. After installation, the auxiliary mounting rod disassembles to serve as a support column for the protective cover, further reinforcing the entire device and preventing it from settling or tipping over in soft paddy fields. This ensures the spatial consistency and comparability of long-term monitoring data. The added protective cover forms a sunshade and heat insulation cavity, reducing the internal temperature rise of the shell. The overall design ensures that the sensor can operate stably and reliably for a long time in extreme field environments. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the high-temperature resistant soil temperature and humidity sensor for rice cultivation according to this utility model.

[0014] Figure 2 This is an exploded view of the high-temperature resistant soil temperature and humidity sensor for rice cultivation according to this utility model.

[0015] Figure 3 This is a diagram showing the auxiliary mounting rods of this utility model connected into a straight rod in use.

[0016] Figure 4 This is a diagram showing the connection state between the first and second plug terminals of this utility model.

[0017] In the diagram: 1. Sensor body; 11. Stainless steel probe; 2. Horizontal positioning disc; 21. Positioning sleeve; 22. Level; 23. Positioning hole; 24. Protective cover; 241. Mounting ear; 3. Auxiliary mounting rod; 31. First insertion rod; 311. First insertion end; 3111. Locking slider; 312. Second insertion end; 3121. Longitudinal groove; 3122. Transverse locking groove; 32. Second insertion rod; 33. Third insertion rod; 34. Positioning cover. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0020] Combination Figures 1-4 This utility model discloses a soil temperature and humidity sensor for high-temperature rice cultivation, comprising a sensor body 1, a horizontal positioning disc 2, and an auxiliary mounting rod 3. A stainless steel probe 11 is connected to the bottom of the sensor body 1. A fixed insertion hole adapted to the stainless steel probe 11 is opened on the horizontal positioning disc 2. A positioning sleeve 21 is provided at the lower end of the insertion hole. The positioning sleeve 21 is sleeved with the stainless steel probe 11 to fix the stainless steel probe 11 in place.

[0021] Specifically, the stainless steel probe 11 has three probes of different lengths, which are installed at different preset depths, such as 5cm, 15cm and 25cm. In reality, the surface humidity cannot represent the water received by the rice. For example, during the drying period, the surface of the field may be cracked, but the root layer may still maintain suitable humidity. Conversely, after irrigation, the surface may be waterlogged, but the root layer may not have been replenished. The temperature and humidity of the soil at different depths are measured by the stainless steel probes 11 of different lengths. The sensor body 1 includes a shell and a main circuit board set inside the shell. The main circuit board is equipped with a multi-channel signal processing unit. Since there are three probes, at least three independent signal acquisition channels, three humidity measurement circuits and three temperature measurement circuits are required. The microcontroller on the main circuit board is responsible for controlling the three channels to measure sequentially or synchronously, converting analog signals into digital signals, and possibly performing preliminary calibration and calculation. The power supply regulator module on the main circuit board provides stable voltage for all circuits. The bottom of the housing also has three independent, sealed electrical interfaces, each corresponding to a stainless steel probe 11. The electrical connection is ensured to be reliable and the probe is double-sealed with a rubber O-ring and epoxy resin potting to prevent moisture from entering from the probe root. Each stainless steel probe 11 is an independent sensing and conduction composite. The stainless steel probe 11 has exposed electrodes at or near the tip for humidity sensing. Near the humidity sensing area, a miniature temperature sensor, such as a waterproof NTC thermistor, is embedded, with its leads passing through the probe and connecting to the main body.

[0022] More specifically, a level 22 is set at the center of the horizontal positioning disc 2 to ensure that the horizontal positioning disc 2 is installed horizontally. The lower end of the positioning sleeve 21 has a conical structure to facilitate the insertion of the positioning sleeve 21 into the soil. In addition, a positioning hole 23 is also provided on the horizontal positioning disc 2. An auxiliary mounting rod 3 is inserted into the positioning hole 23, and a protective cover 24 is fixed by the auxiliary mounting rod 3. The protective cover 24 completely covers the sensor body 1 and protects the sensor body 1.

[0023] It should be noted that the diameter of the auxiliary installation rod 3 is the same as that of the stainless steel probe 11. The auxiliary installation rod 3 includes a first insertion rod 31, a second insertion rod 32, and a third insertion rod 33 of the same length. The first insertion rod 31, the second insertion rod 32, and the third insertion rod 33 can be connected into a straight rod through the first insertion end 311 and the second insertion end 312 set at the end. The length of the straight rod is greater than the length of the longest stainless steel probe 11. After the horizontal positioning disc 2 is installed, the auxiliary installation rod 3 connected into a straight rod is inserted into the insertion hole in sequence. This is equivalent to pre-drilling guide holes in the soil that are completely matched with the size of the stainless steel probe 11. This effectively avoids bending, tilting, or installation difficulties caused by excessive soil resistance when installing the stainless steel probe 11 later. The dispersed first insertion rod 31, the second insertion rod 32, and the third insertion rod 33 are respectively inserted into the positioning hole 23 to fix the position of the protective cover 24. The lower ends of the first insertion rod 31, the second insertion rod 32, and the third insertion rod 33 are inserted into the soil to further fix the position of the horizontal positioning disc 2.

[0024] Furthermore, the first insertion end 311 and the second insertion end 312 are perfectly matched, and a locking slider 3111 is provided inside the first insertion end 311. The second insertion end 312 has an overall conical structure for easy insertion into the soil layer. A longitudinal groove 3121 and a transverse locking groove 3122 are provided on the second insertion end 312. When the first insertion end 311 and the second insertion end 312 are inserted, the locking slider 3111 enters from one end of the longitudinal groove 3121, moves along the longitudinal groove 3121 to one end of the transverse locking groove 3122, and then the second insertion end 312 is rotated, and the locking slider 3111 moves to the end of the transverse locking groove 3122, realizing the connection between the first insertion rod 31, the second insertion rod 32 and the third insertion rod 33. Conversely, after rotating and pulling in the opposite direction, the connection is broken. A positioning cover 34 is provided at the upper end of the first insertion rod 31, the second insertion rod 32, and the third insertion rod 33. The positioning cover 34 is also connected to the first insertion rod 31, the second insertion rod 32, and the third insertion rod 33 through the first insertion end 311 and the second insertion end 312. Specifically, when the first insertion rod 31, the second insertion rod 32, and the third insertion rod 33 are used together, the positioning cover 34 is removed. When the first insertion rod 31, the second insertion rod 32, and the third insertion rod 33 are used separately, the positioning cover 34 is connected. The edge of the protective cover 24 is provided with mounting ears 241. The first insertion rod 31, the second insertion rod 32, and the third insertion rod 33 are respectively inserted into the mounting ears 241, and the protective cover 24 is pressed by the positioning cover 34.

[0025] Working process: At the selected paddy field monitoring point, place the horizontal positioning disk 2 flat on the soil surface and observe the level 22 set in the center of the horizontal positioning disk 2. Ensure that the horizontal positioning disk 2 is horizontal by slightly pressing or leveling the edge of the horizontal positioning disk 2. Take out the auxiliary installation rod 3 and connect the first insertion end 311 and the second insertion end 312 of each rod. Insert the assembled long straight rod vertically into the soil through the preset insertion holes on the horizontal positioning disk 2. Pull out the assembled straight rod, leaving three vertical and smooth pre-formed holes in the soil. Then, install the sensor body 1. The three stainless steel probes 11 at the bottom are aligned with the insertion holes on the horizontal positioning disc 2 and the pre-drilled holes in the soil, respectively. Vertical downward pressure is applied to the sensor body 1, allowing the three probes of different lengths to smoothly insert into the soil along the pre-drilled holes until the bottom of the sensor body 1 contacts the horizontal positioning disc 2 at the designed installation height. The positioning sleeve 21 plays a final guiding and fixing role during this process, ensuring the probes are vertical and accurately positioned. The auxiliary mounting rod 3 is disassembled, and the long straight rod is split into independent first insertion rod 31, second insertion rod 32, and third insertion rod 33. A positioning cap 34 is installed on the upper end of each independent insertion rod to seal its top connection interface. The protective cover 24 is placed over the installed sensor body 1. The lower ends of the three independent probes are inserted into the positioning holes 23 around the horizontal positioning disk 2, and the upper ends pass through the mounting ears 241 on the edge of the protective cover 24. The positioning cover 34 presses the mounting ears 241 and the protective cover 24 together. The exposed electrode at the tip of each probe senses the dielectric constant of the soil at its depth and converts it into a capacitance or resistance signal. The miniature temperature sensor integrated in each probe senses the temperature of the soil at its depth and converts it into a resistance signal. These raw electrical signals are transmitted to the main circuit board through the leads inside the probe and the sealed electrical interface at the bottom of the sensor body 1.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A soil temperature and humidity sensor for high-temperature resistant rice cultivation, comprising a sensor body (1), a horizontal positioning disk (2), and an auxiliary mounting rod (3), characterized in that, The bottom of the sensor body (1) is connected to three stainless steel probes (11) of different lengths. The horizontal positioning disk (2) has a socket adapted to the number and position of the stainless steel probes (11). A positioning sleeve (21) is fixedly installed at the lower end of the socket. The stainless steel probes (11) are vertically inserted into the socket and sleeved with the positioning sleeve (21).

2. The high-temperature resistant soil temperature and humidity sensor for rice cultivation according to claim 1, characterized in that, A level (22) is set at the center of the horizontal positioning disk (2).

3. The soil temperature and humidity sensor for high-temperature rice cultivation according to claim 1, characterized in that, The horizontal positioning disk (2) is also provided with multiple positioning holes (23). The horizontal positioning disk (2) is fixed with a protective cover (24) through the positioning holes (23). The protective cover (24) covers the sensor body (1). The edge of the protective cover (24) is provided with mounting ears (241).

4. The high-temperature resistant soil temperature and humidity sensor for rice cultivation according to claim 1, characterized in that, The auxiliary mounting rod (3) includes a first insert rod (31), a second insert rod (32) and a third insert rod (33). Each insert rod has a first plug-in end (311) and a second plug-in end (312) that match each other. The rod can be connected or separated by rotation locking.

5. The high-temperature resistant soil temperature and humidity sensor for rice cultivation according to claim 4, characterized in that, The first plug-in end (311) is provided with a locking slider (3111), and the second plug-in end (312) is provided with a communicating longitudinal slide groove (3121) and a transverse locking groove (3122).

6. The high-temperature resistant soil temperature and humidity sensor for rice cultivation according to claim 4, characterized in that, The auxiliary mounting rod (3) also includes a positioning cover (34) connected to the first insert (31), the second insert (32) and the third insert (33).

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