Cable temperature and load current measuring wireless device based on induction power taking

Abstract

The invention belongs to the technical field of cable measuring, and particularly relates to a cable temperature and load current measuring wireless device based on induction power taking, which comprises a shell and a power taking and current measuring ring, and is characterized in that the shell comprises an upper shell, a middle shell and a lower shell which are detachable; a main control board and a wireless communication module are fixed in the middle shell; the power taking and current measuring ring is fixedly arranged on the shell and penetrates through a measured cable; the power taking and current measuring ring comprises a detachable annular soft magnetic alloy belt and a Rogowski coil; and and a temperature probe is fixed below the lower shell. The soft magnetic alloy belt is adopted to take power, and the soft magnetic alloy belt is soft and can be easily installed on measured objects in different shapes. The Rogowski coil is used for current measuring, large current does not generate heat, the measuring range is wide, the size is small, the weight is light, and the opening is easy to install. The device is easy to install, Rogowski coils and soft magnetic alloy belts of different sizes can be replaced for measured objects of different sizes, and adaptability and universality are high.

Description

technical field [0001] The invention belongs to the technical field of cable measurement, and in particular relates to a wireless device for measuring cable temperature and load current based on inductive power fetching. Background technique [0002] With the development of sensor technology and Internet of Things technology, more and more electrical equipment requires online monitoring of temperature and load current. In order to meet longer service life and environmental protection, these monitoring devices often use passive power-taking technology to replace disposable batteries. [0003] Common magnetic field power acquisition and current measurement use electromagnetic current transformers. Electromagnetic current transformers tend to heat up or even burn out under high current conditions. However, the insulation structure used to measure current is complicated, the magnetic core is easy to saturate, and the long-term Time use is also prone to rust and technical proble...

AI Technical Summary

Problems solved by technology

[0003] Common magnetic field power acquisition and current measurement use electromagnetic current transformers. Electromagnetic current transformers tend to heat up or even burn out under high current conditions. However, the insulation structure used to measure current is complicated, the magnetic core is easy to saturate, and the long-term Time use is also prone to rust, resulting in technical problems of reduced accuracy

The electromagnetic current transformer has a small measuring current range, and the structure is very large and inconvenient to install if the measuring range is to be increased.

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