A warp tension signal amplification conditioning circuit of a high-speed loom

Abstract

The invention discloses a warp tension signal amplifying and conditioning circuit of a high-speed loom. The signal amplification conditioning circuit comprises a power supply module, an input terminal, a primary differential amplification module, a zero setting module, a secondary differential amplification module, an RC active filtering module and an output terminal, the output terminal is connected with a loom master control system, and The VI+ and VI- pins of the input terminal are mv-level differential signals output by the tension sensor.; the transmission cable shielding line interfacesof the input terminal and the output terminal are connected together, and the power supply module provides + 12V power for the input terminal; the primary differential amplification module takes Mv-level differential voltage signals VI + and VI- output by primary differential amplification module through tension sensor as input, the zero setting module is based on the reverse proportional amplification circuit, and the secondary differential amplification module takes V1 output by the primary differential amplification module and V2 output by the zero setting module as secondary differential signal input. The circuit can realize accurate zeroing, and is high in signal to noise ratio and strong in anti-interference capability.

Description

technical field [0001] The invention relates to the technical field of high-speed loom tension detection, in particular to a high-speed loom warp tension signal amplification and conditioning circuit. Background technique [0002] For the loom, tension control is an important link in the weaving process. The stability of the tension directly affects the quality of the fabric, and the accurate measurement of the tension is the prerequisite for the normal operation of the tension control system. The warp tension of the loom is generally detected by a beam-type tension sensor, powered by an external DC power supply, and output as two-way mv-level differential voltage signals, but the signals cannot be directly sent to the main controller of the loom, such as a single-chip microcomputer or PLC A. / D conversion module, and due to the influence of the working environment of the loom, the signal is susceptible to various noise interference and is unstable. Therefore, the signal mu...

AI Technical Summary

Problems solved by technology

The warp tension of the loom is generally detected by a beam-type tension sensor, powered by an external DC power supply, and output as two-way mv-level differential voltage signals, but the signals cannot be directly sent to the main controller of the loom, such as a single-chip microcomputer or PLC A. / D conversion module, and due to the influence of the working environment of the loom, the signal is susceptible to various noise interference and is unstable

Therefore, the signal must be properly amplified and conditioned, converted into a standard 0-5V or 4-20mA electrical signal and sent to the A / D conversion module of the single-chip microcomputer or PLC. Defects such as low ratio and poor anti-interference ability

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