Sensor and method for monitoring wireless multipoint ground temperatures

Abstract

The invention discloses a sensor for monitoring wireless multipoint ground temperatures. The sensor comprises an electric energy supply unit, a sealing body, an insulating tube, a signal wire, a control board, at least one temperature sensor node unit and a radio frequency unit, wherein the electric energy supply unit is fixed on the sealing body in which the control board is fixed; the sealing body is tightly connected with the insulating tube; the insulating tube is tightly connected with the at least one temperature sensor node unit through threads; and the temperature sensor node unit is connected with the control board through the signal wire. The invention also provides a control method for the sensor, which comprises the following steps that: the wireless radio frequency unit detects a wireless sensor network and sends a network access request to a gateway in the wireless sensor network after detecting the wireless sensor network; after receiving the request, the gateway allows the sensor for monitoring the wireless multipoint ground temperatures to access the network, allocates a network address to the sensor and returning an access success message. The sensor can accurately measure the temperatures of soil in different depths and contributes to the real-time monitoring of soil temperature.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a wireless multi-point ground temperature sensor and a control method. Background technique [0002] Soil temperature will not only affect crop sowing and emergence sooner or later, but also affect root reproduction, root growth rate and lateral root formation rate, affect the absorption, operation and storage of water and mineral nutrients by roots, and affect soil microbial activities and decomposition of organic matter. , is an important environmental factor for crop survival, therefore, soil temperature at different depths needs to be monitored. At present, although there are many ground temperature sensors, most of them are based on single points. It is difficult to measure the temperature of the entire root soil of crops, which brings great difficulties to the study of soil temperature on the growth of crops. In addition, most ground temperature sensors use wired methods, ...

AI Technical Summary

Problems solved by technology

At present, although there are many ground temperature sensors, most of them are based on single points. It is difficult to measure the temperature of the entire root soil of crops, which brings great difficulties to the study of soil temperature on the growth of crops.

In addition, ground temperature sensors mostly use wired methods, which require a large number of cables to be laid in the field, which will greatly increase the project cost and is not conducive to field cultivation.

[0003] The patent "ZL 200420115834.9" proposes a portable multi-point digital ground temperature instrument, which solves the problem of laying cables and multi-point soil temperature measurement, but it also has certain defects. For example, although multiple sensor temperature measuring elements are used in the patent, Because it uses a stainless steel tube with good thermal conductivity, it is buried in the soil for a long time, and finally, the temperature difference at each point is very small, so it is difficult to accurately measure the temperature of soil at different depths; Wiring problem, but not conducive to real-time monitoring of soil temperature

Images