Current sensor of CAN (controller area network) bus interface for mine

Abstract

The invention relates to the current sensor of a CAN (controller area network) bus interface for a mine. The current sensor consists of a current mutual inductor, a rectifier, an acquisition device, a signal amplifier, a filter, an A / D (analog to digital) converter, the CANBUS interface, a data micro processor, a CAN driving transceiver and a direct current power supply. Firstly, input current is converted into a weak alternating current signal which is convenient to process through the current mutual inductor or the Hall principle, then the weak alternating current signal is subjected to rectification and sampling to obtain a direct current signal and is subjected to certain process of amplification and filtering, highly precise A / D conversion is carried out, the direct current signal is converted into a digital signal, the digital signal is subjected to software filtering and linear software processing, according to the micro processor with strong interference resistance capability and the CANBUS interface, the data is converted into a CANBUS standard data frame, an expanding frame or a CanOpen data frame, the data is output by the adoption of the CANBUS protocol, and finally the data is converted into a CANBUS electrical level signal through a special CAN driving transceiver and is sent.

Description

Technical field: [0001] The present invention relates to a current sensor for the mine industry, in particular to a mine CAN bus interface current sensor, which is mainly used in the detection and monitoring of power transmission and distribution of coal mining machines, roadheaders, and mine combined switches and motor currents. Protection, measure single or multi-channel (such as three-phase, multi-group three-phase) current and voltage at the same time. Background technique: [0002] At present, the outputs of sensors used in coal shearers, roadheaders, and mine combination switches are all analog signals, with many transmission signal lines, short transmission distances, and susceptible to interference. The analog interface of the control processor of coal shearer, roadheader and combined switchgear is very limited, but there is a lot of information to be collected, resulting in insufficient interfaces, resulting in the failure to collect a lot of information that needs ...

AI Technical Summary

Problems solved by technology

The analog interface of the control processor of coal shearer, roadheader and combined switchgear is very limited, but there is a lot of information to be collected, resulting in insufficient interfaces, resulting in the failure to collect a lot of information that needs to be collected

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