Modbus Tube Soil Moisture Monitor - Dynamic Observation of Soil Moisture Content and Temperature Status

描述

Product Introduction

1.1 Product Overview

Soil Moisture Monitoring Instrument is a sensor based on the principle of dielectric constant. This detector can dynamically observe the soil moisture content and temperature status at different levels. It can detect the temperature and humidity status of at least 3 layers of soil and up to 5 layers of soil. It is equipped with a tilt angle device to monitor the tilt angle of the soil to determine the soil and equipment status. There is also an advanced version of the tubular soil moisture monitoring device, which is made of sealed material and can be completely waterproof.

1.2 Product Features

The product shell is made of PVC plastic pipe, which emits high-frequency detection waves of nearly 1GHz inside, which can penetrate the plastic pipe and effectively sense the soil environment.

1.3 Technical Parameters

The performance data stated above was obtained under testing conditions using our company's testing system and software. In order to continuously improve our products, our company reserves the right to change design features and specifications without prior notice.1.4 Product Selection

Equipment installation instructions

2.1 Equipment size and detection height

The product adopts a layered observation structure, with one temperature observation point on the ground and one temperature observation point every 10cm for the underground soil

2.2 Pre installation inspection of equipment

Equipment List:

2.2.1 Installation location selection

Install equipment after sowing crops;Attention: The installation location of the equipment should be chosen at a relatively high altitude to prevent rainwater from pouring into the interior of the equipment and causing short circuits or circuit failures. 2.3 Installation MethodStep 1: Use a soil drill to drill holes in the appropriate position1. Place the soil drill vertically on the ground, hold the handle tightly with both hands, press down clockwise, and rotate slowly. (Attention: Do not apply too much force, make sure to rotate slowly for a few more turns to prevent the drill bit from deviating and causing the hole to become crooked.)

2. Remove the soil drill from the hole, place it in a bucket, and collect the soil from the drill into the bucket using the following steps and mud. (Note: Due to excessive impurities in the first drilling soil, it will not be collected.)

3. Repeat the drilling and soil sampling process repeatedly, and try to gently insert the sensor into the hole during this process (do not forcefully touch the bottom of the device) to test whether the depth of the hole is appropriate; If there is any lag, use a soil drill to correct it to ensure smooth insertion and removal of the sensor; Until the hole depth is flush with the installation position marked by the sensor, the drilling is completed.

1. Remove impurities such as stones, grass roots, and insoluble soil blocks from the soil drilled out. Grind the soil fine to mix with the mud. Step 3: Grouting installation

1. Slowly pour the mud into the hole, about 1/2 of the hole position; It can be adjusted according to the actual situation.
2. Slowly insert the sensor into the hole, rotate it in one direction and press it down. If the speed is too fast, it may cause the bubbles to not be completely expelled. (Note: During the process of rotating and pressing down again, do not pull up the sensor to prevent gas from being sucked into the hole again)

3. After the sensor is installed at the correct depth, some mud will overflow around the equipment, and grouting is completed; At this point, the installation depth of the sensor is flush with the hole opening. (Note: Remove excess mud 3cm away from the sensor to prevent clumping and moisture infiltration) Step 4: Installation completedAfter connecting the device to the power cord and 485 communication line, the device will make a beep sound and start working normally. It is recommended to resume normal work after the mud has returned to its normal state.Key points for sand installationThe installation steps for sandy soil are no different from those for loam soil. It is important to prepare sufficient water, not less than 5L. Before grouting, pour water into the hole and wet the entire wall until excess water appears at the bottom of the hole. Then, following the steps, slowly pour the mud into the hole, approximately at 1/2 position of the hole. The remaining installation steps can refer to the installation of loam soil.Key points for clay installationThe installation of clay is carried out after drilling and collecting soil, cleaning impurities, and soaking the clay in water for more than 4 hours to soften it and facilitate the formation of a relatively uniform slurry. After soaking, stir until viscous, and then grout. The remaining installation steps can refer to the installation of loam soil.

2.4 Product wiring instructions

Wide voltage power supply can input 10-30V. When wiring the 485 signal line, be careful not to connect wires A and B in reverse, and ensure that the addresses of multiple devices on the bus do not conflict.

Install and use configuration software

3.1  Software Selection

Open the package, select "Debugging Software" ->"485 Parameter Configuration Software", find "Yes" and open it. Note: When using this configuration software to change the address and baud rate, only one device can be connected.3.2Parameter Settings

communication protocol

4.1  Basic communication parameters

4.2Data Frame Format Definition

Adopting ModBus RTU communication protocol, the format is as follows:Host query frame structure:

4.3  Register Address

4.4  Example and Explanation of Communication Protocol

Example: Read device address0x01 The first layer of soil temperature and moisture valuesInquiry frame (hexadecimal):

(For example, reading a temperature of -10.1 ℃ and a moisture content of 65.8% RH)

When the temperature is below 0 ℃, the temperature data is uploaded in the form of a supplementary code.Example:Read device address0x01 The angle valueInquiry frame (hexadecimal):

(e.g. reading an angle value of 80 °)

Example: Read device address0x01 TheX Axis angle component valueInquiry frame (hexadecimal):

(For example, reading that the X-axis angle component value is 90 °)

Example: Read device address0x01 TheX Axial acceleration component valueInquiry frame (hexadecimal):

(For example, reading that the X-axis acceleration component value is 0.5g)