CN110895870A

CN110895870A - Soil humidity sensor based on power line carrier communication

Info

Publication number: CN110895870A
Application number: CN201811066108.5A
Authority: CN
Inventors: 徐华
Original assignee: South Nanjing Tianyu Technology Co Ltd
Current assignee: Suzhou Kunling Intelligent Technology Co.,Ltd.
Priority date: 2018-09-13
Filing date: 2018-09-13
Publication date: 2020-03-20

Abstract

The invention relates to a soil humidity sensor based on power carrier communication, which consists of a sensor (1), a carrier measurement port module (2) and a direct current stabilized power supply (3), wherein signals of the carrier communication sensor can be transmitted through a 220V low-voltage power line. The invention solves the problem that signals are difficult to transmit due to too many carried electronic devices on a 220V low-voltage power line, does not need to rearrange signal lines, and greatly reduces the engineering construction cost on the premise of ensuring the reliability. The invention is applied to an intelligent agricultural monitoring system, and the measurement objects are as follows: the soil moisture.

Description

Soil humidity sensor based on power line carrier communication

Technical Field

The invention relates to a soil humidity sensor capable of transmitting signals through a 220V power line. The technical field relates to a power line carrier communication and measuring instrument.

Background

The invention is mainly used for measuring soil humidity in intelligent agricultural production and can also be used in other fields.

The intelligent agricultural monitoring can involve a signal transmission method, and the method is related to the construction cost and the reliability of the system. At present, a wired transmission method for arranging data lines and a wireless transmission method in a Zigbee mode are used more. The Zigbee mode of wireless transmission is similar to the wireless communication of a femtocell, and the construction cost of the wireless communication mode is lower than that of the wired communication of a data line. However, stability and reliability are difficult to compare with wired communication, and particularly, in case of a disaster weather, the stability and reliability are often affected.

Power line carrier communication is a conventional technology. The application of the high-voltage power grid is mature on 35kV high-voltage and 10kV medium-voltage power grids. On a 380V/220V low-voltage power line, because the number of mounted electronic equipment is too large, network noise is too large, and the low-voltage power line is difficult to be used for signal transmission. Although the prior power line remote meter reading technology and the like are available, the effect is not ideal, so the method is not widely popularized.

The strong and weak current data conversion functional module has strong anti-interference capability. The method can better solve the problem of real-time signal transmission and reception in a high-noise environment internationally, and has stable signal transmission and no mutual interference. The invention saves the data line arrangement to a great extent. On the premise of ensuring reliability, the construction cost of the intelligent agricultural monitoring system is greatly reduced.

Disclosure of Invention

The utility model provides a soil moisture sensor based on power line carrier communication which characterized in that: the device comprises a soil humidity sensor (1), a carrier measurement port module (2) and a direct current stabilized power supply (3), wherein a measurement signal output port of the soil humidity sensor (1) is connected with a measurement signal input port of the carrier measurement port module (2), and the direct current stabilized power supply (3) supplies power to the soil humidity sensor (1) and the carrier measurement port module (2) respectively. The soil humidity sensor (1) is a frequency domain reflector and the like for soil humidity measurement. The carrier measurement port module (2) comprises an analog/digital signal conversion function module (2-1), an address code function module (2-2) and a strong and weak current data conversion function module (2-3), the strong and weak current data conversion function module is provided with a signal input port, a weak current input port and a 220V strong current port, and digital signals can enter and exit the carrier measurement port module (2) from the 220V strong current port through the strong and weak current data conversion function module (2-3). The direct current stabilized power supply is a device capable of converting 220V alternating current into low-voltage direct current and provides power for the soil humidity sensor (1) and the carrier measurement port module (2).

The analog signal measured by the soil humidity sensor (1) is firstly converted into a digital signal through an analog/digital signal conversion functional module (2-1) in the carrier detection port module (2), then an address code is added by the address code functional module (2-2), and finally the digital signal is transmitted to a power line through the strong and weak current data conversion functional module (2-3). The signals processed by the strong and weak current data conversion function module (2-3) can be transmitted to a controller of the intelligent agricultural control system through a 220V power line, and the controller can identify where the measurement signals are sent out according to the address codes.

The invention relates to the application of power carrier communication on a measuring instrument, and the signal transmission method can also be used in a 380V three-phase alternating current environment.

Drawings

FIG. 1 is a block diagram of the present invention.

Detailed Description

A frequency domain reflector is used for manufacturing a soil humidity sensor. The DC stabilized power supply adopts an AC/DC switching power supply to provide 12V DC. And respectively manufacturing integrated circuit chips of the analog/digital signal conversion function module, the address code function module and the strong and weak current data conversion function module. The structure diagram of the invention is assembled into a soil humidity sensor based on power line carrier communication.

Claims

1. The utility model provides a soil moisture sensor based on power line carrier communication which characterized in that: the device comprises a soil humidity sensor (1), a carrier measurement port module (2) and a direct current stabilized power supply (3), wherein a measurement signal output port of the soil humidity sensor (1) is connected with a measurement signal input port of the carrier measurement port module (2), and a weak current output port of the direct current stabilized power supply (3) is respectively connected with the soil humidity sensor (1) and the weak current input port of the carrier measurement port module (2).

2. The soil moisture sensor (1) as claimed in claim 1 is a sensor for soil moisture measurement having a signal output port and a weak current input port.

3. The carrier measurement port module (2) according to claim 1, comprising an analog/digital signal conversion function module (2-1), an address code function module (2-2), a strong/weak current data conversion function module (2-3) having a signal input port, a weak current input port, and a 220V strong current port, wherein digital signals are accessible to and accessible from the 220V strong current port through the strong/weak current data conversion function module (2-3).

4. The regulated DC power supply of claim 1 is a device capable of converting 220V AC power into low-voltage DC power, and supplies power to the soil moisture sensor (1) and the carrier measurement port module (2).