Title:
CIRCUIT AND METHOD FOR IMPROVING MEASUREMENT ACCURACY OF MULTI-CHANNEL WATER QUALITY SENSOR
Document Type and Number:
WIPO Patent Application WO/2023/279666
Kind Code:
A1
Abstract:
A circuit for improving measurement accuracy of a multi-channel water quality sensor, comprising: a waveform generation module (1) and an emission channel module (2) that are successively and electrically connected to each other, the emission channel module (2) comprising at least two emission channels, and the at least two emission channels comprising at least two driving circuits, two excitation sources, and at least one phase shifter. The phase shifter performs phase shifting, such that multiple excitation emission channels respectively and alternately work, thereby respectively and alternately driving the excitation sources, reducing the interference between the multiple excitation emission channels, and facilitating the improvement of the measurement accuracy of water quality; moreover, because the electromagnetic interference between the channels is reduced, the power supply ripple interference can be reduced, and thus the impact on a power supply is reduced.
Inventors:
QIU HUIFANG (CN)
SHI MEI (CN)
ZHANG QINJUN (CN)
SHI MEI (CN)
ZHANG QINJUN (CN)
Application Number:
PCT/CN2021/138218
Publication Date:
January 12, 2023
Filing Date:
December 15, 2021
Export Citation:
Assignee:
SHANGHAI ELECTRIC DIGITAL ECO TECH CO LTD (CN)
International Classes:
G01N27/00
Foreign References:
| CN113484367A | 2021-10-08 | |||
| CN211235503U | 2020-08-11 | |||
| CN108896454A | 2018-11-27 | |||
| CN207051476U | 2018-02-27 | |||
| CN109085149A | 2018-12-25 | |||
| US20160298996A1 | 2016-10-13 |
Attorney, Agent or Firm:
BEIJING ZHI CHENG HAN FANG IP AGENCY CO., LTD. (CN)
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