Signal detection circuit of atmospheric ozone sonde

Abstract

The invention relates to a signal detection circuit of an atmospheric ozone sonde. The signal detection circuit of the atmospheric ozone sonde comprises a microcurrent signal detection circuit connected with the output end of an atmospheric sensor, wherein the microcurrent signal detection circuit comprises a chopping self-stabilization zero amplifier, the anti-phase end of the chopping self-stabilization zero amplifier is connected with the output end of the atmospheric ozone sensor, the in-phase end of the chopping self-stabilization zero amplifier is grounded, the anti-phase end of the chopping self-stabilization zero amplifier is connected with the output end of the chopping self-stabilization zero amplifier through a second resistor, and two ends of the second resistor are in parallel connection with a fourth capacitor. The output end of the chopping self-stabilization zero amplifier is connected with a low-pass filter, and the chopping self-stabilization zero amplifier converts microcurrent signals output by the atmospheric ozone sensor into voltage signals through the low-pass filter and outputs the voltage signals. The signal detection circuit of the atmospheric ozone sonde is simple and compact in structure, improves response speed and detection accuracy, reduces measuring errors, and is wide in application range and safe and reliable.

Description

technical field [0001] The invention relates to a detection circuit, especially a signal detection circuit of an atmospheric ozone sonde, specifically a detection circuit capable of accurately detecting the output signal of an atmospheric ozone sonde, which belongs to the signal detection circuit of an atmospheric ozone sonde technical field. Background technique [0002] The detection of the atmospheric ozone sensor is affected by the atmospheric detection conditions. The sensor output signal is a weak current less than 10μA. At the same time, due to the uneven distribution of ozone concentration in the atmosphere and the rapid change of ozone concentration, the sensor and detection circuit are required to have a high response. speed. The conventional atmospheric ozone sonde signal detection circuit is to pass the measured micro-current signal through a fixed resistance resistor to generate a voltage drop on the resistor, then use an operational amplifier to amplify the si...

AI Technical Summary

Problems solved by technology

Since this method is to connect a large resistance resistor in series with the current loop of the ozone sensor, the output current of the sensor and the corresponding speed are greatly affected, resulting in measurement errors.

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