Charging-type portable pA micro current monitoring system

Abstract

The invention relates to a charging-type portable pA micro current monitoring system. The system adopts a single lithium battery for a unit for storing and supplying electric energy, a low-power consumption and high-precision operational amplifier and a feedback circuit are adopted, with a pA-level micro current I / V conversion circuit as a core, through multiple anti-interference protection circuits, USB is selected for charging through a charging switch, system power supply is selected through a power supply selection switch, the system power supply comes from the USB in match with the lithium battery, and monitoring on the pA micro current is completed. The charging-type portable pA micro current monitoring system can be used as a portable measurement instrument and can be used indoors, outdoors and other places in need of monitoring, power supply by the lithium battery can be realized both indoors and outdoors, and power supply by the USB is also realized. The size of the monitor of the invention is only the size of a palm, the weight is light, carrying is facilitated, the monitoring precision is high, the price is low, the testing is convenient, and a corresponding conversion voltage value can be tested when to-be-monitored micro current is inserted according to requirements.

Description

technical field [0001] The invention relates to the field of microcurrent monitoring, in particular to a rechargeable portable microcurrent monitoring system. Background technique [0002] The world is composed of many substances, and electrons in the substances are one of the elementary particles, and the movement of electrons will generate electric current. Weak signals commonly exist in human life, such as weak light, weak sound, weak magnetic field, small capacitance, small displacement and micro pressure, etc. With the rapid development of science and technology, the measurement of weak current is inseparable from many fields. In the fields of semiconductor production, insulating materials, weak detection, etc., the generation and testing of micro current plays a very important role, and the measurement range of most weak currents is far below 10- 10 a. Therefore, the technique of measuring microcurrent has wide application prospects in various fields and is of great...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the inconvenience of using the existing pA monitor due to its large volume, heavy weight, high power consumption, high wiring complexity, and high price. For this reason, the present invention completes a micro-current monitoring system

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