A small soil temperature, humidity and salt sensor for smart agriculture

Abstract

The present invention discloses a small soil temperature, humidity and salt sensor for smart agriculture, including an external shell and a mainboard circuit, wherein the mainboard circuit includes an internal signal processing module and a frequency fitting module, wherein the frequency fitting module completes signal transmission and reception for soil moisture and salt measurement respectively, and the internal signal processing module of the mainboard circuit completes signal acquisition and processing, and finally obtains soil parameters. The present invention has a scientific and reasonable structure, is safe and convenient to use, and adopts an integrated structure to solve the inconvenience of installation and the trouble of multiple burials. The use of on-board copper cladding solves the problems of difficulty in processing, high cost and easy corrosion of metal probes. The integrated on-board structure completes the simultaneous measurement of soil temperature, soil humidity and soil salt. The traditional probe type is replaced by the internal copper cladding of the board, which is suitable for promotion and use.

Description

Technical Field

[0001] The present invention relates to the technical field of soil temperature, humidity and salt sensors, and in particular to a small soil temperature, humidity and salt sensor for smart agriculture. Background Art

[0002] Soil refers to a loose layer of material on the surface of the earth, composed of various granular minerals, organic matter, water, air, microorganisms, etc., and can grow plants. Soil is composed of minerals formed by weathering of rocks, organic matter produced by the decomposition of animal and plant and microbial residues, soil organisms (solid phase matter), water (liquid phase matter), air (gas phase matter), oxidized humus, etc.

[0003] The common sensors for soil temperature, humidity and soil salinity on the market are mostly split sensors, which require the purchase of multiple models. They also need to be buried separately when measuring, and the installation remains unchanged. Among them, the measurement of soil humidity mostly uses probes. The material of the probes is mostly metal, which is inconvenient to process. After burial, the data will be inaccurate due to problems such as rust. Summary of the invention

[0004] The present invention provides a small soil temperature, humidity and salt sensor for smart agriculture, which can effectively solve the problem mentioned in the above background technology that most of the common sensors for soil temperature, humidity and soil salinity on the market are split sensors, and multiple models need to be purchased. They also need to be buried separately when buried for measurement, and the installation remains unchanged. Among them, the measurement of soil humidity mostly adopts a probe type. The material of the probe is mostly metal, which is inconvenient to process. After burial, it will also cause inaccurate data due to rust and other problems.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a small soil temperature, humidity and salt sensor for smart agriculture, comprising an external housing and a mainboard circuit;

[0006] The mainboard circuit includes an internal signal processing module and a frequency fitting module;

[0007] The frequency fitting module completes the signal transmission and reception for soil moisture and salinity measurement respectively;

[0008] The signal processing module inside the main board circuit completes the signal acquisition and processing, and finally obtains the soil parameters.

[0009] Preferably, the mainboard uses onboard copper cladding instead of probes to complete the measurement of soil moisture and soil salinity.

[0010] Preferably, the soil moisture is collected by using a high-frequency frequency domain reflection method.

[0011] Preferably, the soil salinity is measured using a low-frequency conductivity measurement method.

[0012] Compared with the prior art, the invention has the following beneficial effects: the invention has a scientific and reasonable structure, is safe and convenient to use, adopts an integrated structure to solve the inconvenience of installation and the trouble of multiple burials, adopts board-mounted copper cladding to solve the problems of difficult processing, high cost and easy corrosion of metal probes, and the integrated board-mounted structure can achieve the simultaneous measurement of soil temperature, soil moisture and soil salinity. The copper cladding inside the board replaces the traditional probe type, which is suitable for promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0014] In the attached picture:

[0015] Figure 1 It is a schematic diagram of the sensor structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the circuit structure of the high-frequency frequency domain reflection method of the present invention;

[0017] Figure 3 It is a schematic diagram of the circuit structure of the low-frequency conductivity measurement method of the present invention. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0019] Embodiment 1:

[0020] like Figure 1 As shown, the present invention provides a technical solution, a small soil temperature, humidity and salt sensor for smart agriculture, including an external shell and a mainboard circuit;

[0021] The mainboard circuit includes an internal signal processing module and a frequency fitting module;

[0022] The frequency fitting module completes the signal transmission and reception for soil moisture and salinity measurement respectively;

[0023] The signal processing module inside the main board circuit completes the signal acquisition and processing, and finally obtains the soil parameters.

[0024] Preferably, the main board replaces the probe with onboard copper to complete the measurement of soil moisture and soil salinity.

[0025] Embodiment 2:

[0026] like Figure 1-2 As shown, the present invention provides a technical solution, a small soil temperature, humidity and salt sensor for smart agriculture, including an external shell and a mainboard circuit;

[0027] The mainboard circuit includes an internal signal processing module and a frequency fitting module;

[0028] The frequency fitting module completes the signal transmission and reception for soil moisture and salinity measurement respectively;

[0029] The signal processing module inside the main board circuit completes the signal acquisition and processing, and finally obtains the soil parameters.

[0030] Preferably, the main board replaces the probe with onboard copper to complete the measurement of soil moisture and soil salinity.

[0031] Preferably, soil moisture is collected by using a high-frequency frequency domain reflection method.

[0032] The 1st port of the MC1648 integrated oscillator chip is connected in series with the 1st terminal of the ACM2012-601 winding inductor;

[0033] Port 8 of the MC1648 integrated oscillator chip is connected in parallel with capacitor C7, connected in series with resistor R4, and then connected in series with terminal 2 of the ACM2012-601 wound inductor;

[0034] Ports 2 and 3 of the MC1648 integrated oscillator chip are connected to a 5V power supply, and the 5V power supply is connected in parallel to capacitors C8 and C9;

[0035] Port 4 of the MC1648 integrated oscillator chip is the output port;

[0036] Ports 6 and 7 of the MC1648 integrated oscillator chip are connected in parallel with port 5 of the MC1648 integrated oscillator chip;

[0037] MC1648 integrated oscillator chip No. 5 is connected to capacitor C6;

[0038] Capacitor C6, capacitor C7, capacitor C8 and capacitor C9 are all connected to the ground line.

[0039] Embodiment 3:

[0040] like Figure 1 , 3 As shown, the present invention provides a technical solution, a small soil temperature, humidity and salt sensor for smart agriculture, including an external shell and a mainboard circuit;

[0041] The mainboard circuit includes an internal signal processing module and a frequency fitting module;

[0042] The frequency fitting module completes the signal transmission and reception for soil moisture and salinity measurement respectively;

[0043] The signal processing module inside the main board circuit completes the signal acquisition and processing, and finally obtains the soil parameters.

[0044] Preferably, the main board replaces the probe with onboard copper to complete the measurement of soil moisture and soil salinity.

[0045] Preferably, soil salinity is measured using a low-frequency conductivity measurement method.

[0046] Terminal 1 of the TLC555 chip is connected to the GND ground terminal;

[0047] Terminals 2 and 6 of the TLC555 chip are connected in parallel with capacitor C26, and capacitor C26 is connected to the GND ground terminal;

[0048] Terminal 3 of the TLC555 chip is connected to TDI through resistor R23;

[0049] Terminal 4 of the TLC555 chip is connected in series with terminal 8 of the TLC555 chip, and terminal 4 of the TLC555 chip is connected to resistor R21;

[0050] Terminal 5 of the TLC555 chip is connected to the GND ground terminal through capacitor C27;

[0051] Terminal 7 of the TLC555 chip is connected in parallel with terminal 8 of the TLC555 chip, and terminal 8 of the TLC555 chip is connected to resistor R22, which is connected in series with resistor R24.

[0052] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A small soil temperature, humidity and salt sensor for smart agriculture, characterized by: Including an external shell and a mainboard circuit; The mainboard circuit includes an internal signal processing module and a frequency fitting module; The frequency fitting module completes the signal transmission and reception for soil moisture and salinity measurement respectively; The signal processing module inside the main circuit completes the signal acquisition and processing, and finally obtains the soil parameters; The mainboard replaces the probe with onboard copper to measure soil moisture and soil salinity; The soil moisture is collected by using a high-frequency frequency domain reflection method; The No. 1 port of the MC1648 integrated oscillator chip is connected in series with the No. 1 terminal of the ACM2012-601 wound inductor; Port 8 of the MC1648 integrated oscillator chip is connected in parallel with capacitor C7, connected in series with resistor R4, and then connected in series with terminal 2 of the ACM2012-601 wound inductor; Ports 2 and 3 of the MC1648 integrated oscillator chip are connected to a 5V power supply, and the 5V power supply is connected in parallel with capacitors C8 and C9; Port 4 of the MC1648 integrated oscillator chip is the output port; Ports 6 and 7 of the MC1648 integrated oscillator chip are connected in parallel with port 5 of the MC1648 integrated oscillator chip; MC1648 integrated oscillator chip No. 5 is connected to capacitor C6; Capacitor C6, capacitor C7, capacitor C8 and capacitor C9 are all connected to the ground line.

2. A small soil temperature, humidity and salt sensor for smart agriculture according to claim 1, characterized in that: The soil salinity is measured using a low-frequency conductivity measurement method.

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