Current analog quantity signal distributor

Abstract

The invention relates to a current analog quantity signal distributor. The current analog quantity signal distributor is characterized by comprising a DC / DC power module, a signal receiving and processing module, a fault diagnosis module, an isolation amplifier, a V / I module and a signal distribution module. The DC / DC power module is used for providing supply voltage. Input current signals with current ranging from 4 mA to 20 mA are respectively sent to the signal receiving and processing module and the signal distribution module. The signal receiving and processing module converts the input current signals into voltage signals, processes the voltage signals, and sends processed voltage signals to the isolation amplifier. The isolation amplifier conducts isolation amplification on the received voltage signals and sends the processed signals to the V / I module. The V / I module converts the voltage signals into current signals with current ranging from 4 mA to 20 mA, and sends the current signals to the signal distribution module. The fault diagnosis module diagnoses the faults in the signal receiving and processing module; if the supply voltage is normal, three paths of current signals with current ranging from 4 mA to 20 mA are output; if the supply voltage is out of order, one path of current ranging from 4 mA to 20 mA is output, and the other two paths of output current signals are zero.

Description

technical field [0001] The invention relates to the technical field of analog signal distribution devices, in particular to a current analog signal distributor suitable for sensor signal acquisition in an electro-hydraulic composite control system of a deepwater blowout preventer. Background technique [0002] The electro-hydraulic composite control system of underwater blowout preventer is a system that requires extremely high reliability. It usually adopts double redundancy or triple redundancy design, and needs to input one sensor signal to two or three signal receiving modules. , and the power module of the traditional current analog signal distributor will cause distortion or loss of the sensor signal when it fails, and the underwater equipment cannot replace the faulty component at any time; in addition, if there is a problem in drilling, it will It will bring a lot of trouble to the subsequent drilling operation, which requires a fault handling mechanism. When a fault...

AI Technical Summary

Problems solved by technology

[0002] The electro-hydraulic composite control system of underwater blowout preventer is a system that requires extremely high reliability. It usually adopts double redundancy or triple redundancy design, and needs to input one sensor signal to two or three signal receiving modules. , and the power module of the traditional current analog signal distributor will cause distortion or loss of the sensor signal when it fails, and the underwater equipment cannot replace the faulty component at any time; in addition, if there is a problem in drilling, it will It will bring a lot of trouble to the subsequent drilling operation, which requires a fault handling mechanism. When a fault occurs, the fault module will be automatically skipped to ensure the normal reception of the signal

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