An Intelligent Dissolved Oxygen Electrode Without Production Calibration
A dissolved oxygen electrode, an intelligent technology, applied in the direction of material analysis, instruments, and measuring devices through electromagnetic means, can solve problems such as production calibration troubles, susceptibility to interference, etc., achieve strong practicability, improve economic effects, and reduce manpower and the effect of time investment
Active Publication Date: 2019-04-30
宁夏易通联创科技有限公司 +1
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Problems solved by technology
The traditional electrode is not only difficult to produce and calibrate, but also the signal line is an analog signal, which is also susceptible to interference
Method used
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[0019] Such as figure 1 As shown, an intelligent dissolved oxygen electrode that does not require production calibration includes a special silver rod 1, a temperature sensor 2, a special iron block 3, a circular plastic cavity 4, an electrolyte 401, an ADC chip 5, an oxygen-permeable film 6, Steel wire mesh 601, cylindrical plastic cavity 7, thermistor 8, four-core terminal 9.
[0020] In this embodiment, the new intelligent dissolved oxygen electrode is placed in the water body to be tested, and the dissolved oxygen in the water body will penetrate through the oxygen-permeable membrane 6 and combine with the electrolyte 401 and the special iron block. 3 and the special silver rod 1 produces a redox reaction to generate a weak current, which is then converted into a voltage signal by the thermistor 8 and provided to the ADC chip 5 .
[0021] In this embodiment, the steel mesh 601 is used to protect the oxygen-permeable membrane 6 from being easily damaged.
[0022] In this ...
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The invention relates to an intelligent dissolved oxygen electrode without production calibration. The intelligent dissolved oxygen electrode comprises a special silver rod, a DS18B20 temperature sensor, a special iron block, electrolyte, an ADS1115 chip, an oxygen permeable membrane and a thermistor. The thermistor with an appropriate negative temperature coefficient is selected to convert a current signal into a voltage signal, and the voltage signal is collected by the ADS1115 chip; the ADS1115 chip can be externally connected with the DS18B20 temperature sensor through four signal lines only; an external connecting device is used for directly acquiring a digital signal of the intelligent dissolved oxygen electrode in an I2C manner, the acquired data refers to real voltage and temperature values, the intelligent dissolved oxygen electrode can be directly used without complicated production calibration, the electrode voltage values in air and a water body and a temperature value of the water body are respectively obtained when the external connecting device operates, and an actual dissolved oxygen value in the water body can be calculated by a core algorithm. The intelligent dissolved oxygen electrode disclosed by the invention is novel in circuit thinking, high in precision and simple and convenient to use and has extremely high popularization and application values.
Description
technical field [0001] The invention relates to the field of water quality monitoring, in particular to an intelligent dissolved oxygen electrode which does not require production calibration. Background technique [0002] During the use of traditional electrochemical dissolved oxygen electrodes, especially in the production process, many calibrations are required. Generally, precision instruments must be used to calibrate the current or voltage channels to calculate the analog signals of the electrodes after AD conversion. The corresponding actual current value or voltage value. The temperature acquisition generally adopts a thermistor with a temperature of 13.68K ohms or 21.9K ohms at 25 degrees. After dividing the voltage by resistors and then undergoing AD conversion processing, calibration is also required. Moreover, the temperature compensation of dissolved oxygen usually uses water bath equipment for compensation and correction in different temperature ranges. The t...
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IPC IPC(8): G01N27/333
CPCG01N27/333
Inventor 沈杜海
Owner 宁夏易通联创科技有限公司