Method and device for measuring dissolved oxygen based on dual-channel lock-in amplifying technique

A technology of lock-in amplification and measurement device, which is applied in measurement device, material analysis by optical means, instrument, etc., can solve the problems of multiplier and low-pass filter output influence, easy failure, instability and other problems, and achieves convenient use. , the effect of improving anti-pollution ability, high detection accuracy and test data stability
CN107389643AActive Publication Date: 2017-11-24OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
5 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
Publication Date
2017-11-24

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the technical field of ocean observation and discloses a device and a method for measuring dissolved oxygen based on a dual-channel lock-in amplifying technique. The device comprises an oxygen sensitive membrane, an optical detection module, a signal modulation and demodulation module, a signal processing module, a system control module, a communication module and a power management module. Through the technical scheme, the device and the method are capable of measuring the content of the dissolved oxygen in the water in real time, are free of consumption of samples and free of pollution, is stable and efficient, and is also capable of achieving remote on-line in-situ monitoring.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The patent of the present invention relates to the technical field of marine monitoring, in particular to a dissolved oxygen measuring device and method based on dual-channel lock-in amplification technology. Background technique

[0002] Oxygen is closely related to people's production and life. The determination of dissolved oxygen has important applications in aquaculture, papermaking, metallurgy, chemical oil refining, sewage treatment, and medical biology. Traditional dissolved oxygen measurement techniques mainly include titration iodometric method, electrochemical method and analog lock-in amplification method. Since the iodometric method consumes a large amount of samples, remote monitoring cannot be realized, and the sensor made by the electrochemical method has inherent defects such as easy contamination, frequent cleaning, instability and failure. Although the analog lock-in amplification technology can detect the weak dissolved oxygen sign...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More