Liquid weight data acquisition circuit of body cavity hyperthermal perfusion treatment machine

Abstract

The invention discloses a liquid weight data acquisition circuit of a body cavity hyperthermal perfusion treatment machine. The liquid weight data acquisition circuit is composed of a weight detectingcircuit, a differential amplifying circuit and a level matching circuit. The weight detecting circuit, the differential amplifying circuit and the level matching circuit are successively connected electrically. The weight detecting circuit detects liquid weight change in the container. After a milivolt-grade electric signal is generated, the differential amplifying circuit performs amplification.The level matching circuit performs zero-value adjustment and satisfaction adjustment on an input amplifying circuit so that the output signal of the liquid weight data acquisition circuit has accurate zero value and accurate satisfaction value. Furthermore the output signal level is between 0 and +5V and matches an input interface signal level of a data acquisition analog quantity, thereby satisfying an analog-to-digital conversion input requirement. Furthermore the liquid weight data acquisition circuit has effects of reducing distortion rate and improving interference resistance of a transmitted signal.

Description

technical field [0001] The invention relates to a weight sensing and data collection and processing circuit, in particular to a liquid weight data collection circuit of a body cavity heat perfusion treatment machine. Background technique [0002] Existing liquid measuring and weighing equipment generally uses special weighing chips such as CS5532 to detect and convert the weight signal of the weighing object, while the weight signal of the measuring object is directly output by the weight sensor, and the output signal is very weak and cannot be compared with The signal level of the data acquisition analog input interface matches, which cannot meet the requirements of the input signal of the analog-to-digital conversion circuit. In addition, the weight signal is easily interfered by noise, which will cause instability, zero drift, and Defects such as poor repeatability will eventually cause serious distortion of the weighing weight calculated by the weighing equipment. Cont...

AI Technical Summary

Problems solved by technology

[0002] Existing liquid measuring and weighing equipment generally uses special weighing chips such as CS5532 to detect and convert the weight signal of the weighing object, while the weight signal of the measuring object is directly output by the weight sensor, and the output signal is very weak and cannot be compared with The signal level of the data acquisition analog input interface matches, which cannot meet the requirements of the input signal of the analog-to-digital conversion circuit. In addition, the weight signal is easily interfered by noise, which will cause instability, zero drift, and Defects such as poor repeatability will eventually cause serious distortion of the weighing weight calculated by the weighing equipment

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