On-line monitoring capacitive sensor

Abstract

The invention provides an on-line monitoring capacitive sensor. The sensor comprises a capacitor, a capacitor dielectric core, a pollutant injection mechanism, a charging and discharging oscillation circuit, a high-frequency pulse reading unit and a CPU processing unit. Two parallel polar plates of the capacitor are connected to the charging and discharging oscillation circuit; the charging and discharging oscillation circuit can charge and discharge the two parallel polar plates of the capacitor to obtain a high-frequency pulse signal, the high-frequency pulse signal is sent to the high-frequency pulse reading unit through the output end of the charging and discharging oscillation circuit, and the high-frequency pulse reading unit sends the read pulse signal to the CPU processing unit. Physical quantities are converted into high-frequency pulse signals, the physical quantities are monitored by monitoring the numerical values of the high-frequency pulse signals, and different monitoredenvironmental pollution can be sprayed to a capacitor dielectric core.

Description

Technical field [0001] The invention belongs to the technical field of environmental monitoring, and specifically relates to an online monitoring capacitive sensor. Background technique [0002] The core technology of environmental monitoring lies in the collection and processing capabilities of sensors. In our country, the monitoring links of many media such as water, gas, and soil cannot fully meet the requirements of online real-time monitoring, which leads to the lag of environmental monitoring. The traditional sensor converts the physical quantity to be measured into a voltage or current value, and completes the monitoring of the physical quantity by monitoring the magnitude of the voltage or current. Summary of the invention [0003] The invention provides an on-line monitoring capacitive sensor, which obtains corresponding pulse signals by performing high-frequency charging and discharging on the capacitors at both ends of the dielectric core, and then performs calibration ...

AI Technical Summary

Problems solved by technology

[0002]The core technology of environmental monitoring lies in the acquisition and processing capabilities of sensors. In my country, the monitoring links of water, air, soil and many other media cannot fully meet the requirements of online real-time monitoring. requirements, resulting in a lag in environmental monitoring

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