Oil-water interface position measuring method based on CCD
A technology of oil-water interface and measurement method, which is applied in the direction of measuring device, liquid/fluid solid measurement, liquid level indicator, etc. It can solve the problems of measurement error, inaccurate results, corrosion of metal pipes, etc., and achieves convenient use, The effect of simple structure
Inactive Publication Date: 2015-05-13
TIANJIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
The capacitive oil-water interface detection method inserts a metal tube into the metal container as an electrode. The metal container, the metal tube and the liquid in the middle form a capacitor. However, when the humidity in the container is high, the metal tube will be corroded, and it will be affected by long-term use. measurement accuracy
The ultrasonic oil-water interface detection method uses the difference in the propagation speed of sound waves in different media to measure the time difference required for the ultrasonic probe to receive the ultrasonic reflection signal, and then calculate the position of the oil-water interface. large error
In addition, the existing method can only measure the equivalent position of the liquid interface, and cannot obtain accurate results
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[0024] The technology of the present invention will be described in detail below in conjunction with the accompanying drawings. A method for measuring the position of the oil-water interface based on CCD, comprising the following steps:
[0025] Step 1: Put the LED lamp group and the linear array CCD into the sealed tube, and insert them into the appropriate position in the liquid;
[0026] Step 2: Power on the LED lamp group and the linear array CCD, and the linear array CCD receives the transmitted light of the LED lamp through the liquid;
[0027] Step 3: The linear array CCD sends the light intensity data to the computer;
[0028] Step 4: The computer analyzes the light intensity data to determine the position of the oil-water interface.
[0029] The working process of the present invention is as figure 1 As shown, the LED light group emits scattered light, passes through the measured object (oil layer and water layer), the linear array CCD receives the transmitted ligh...
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The invention belongs to the field of industrial measurement, discloses an oil-water interface position measuring method based a CCD, and particularly relates to oil-water interface position measurement. The method comprises the steps that 1, an LED lamp set and the linear array CCD are loaded into a sealed tube to be inserted into the proper position in liquid; 2, the LED lamp set and the linear array CCD are powered on, and the linear array CCD receives transmission light, passing through the liquid, of LED lamps; 3, the linear array CCD sends light intensity data to a computer; 4, the computer analyzes the light intensity data and judges the position of an oil-water interface. According to the fourth step of analyzing and judging the position of the oil-water interface, points with the minimum light intensity value are obtained, the trough range of the points with the minimum light intensity value is determined, and the position of the oil-water interface and the position of an oil-air interface are determined within the trough range. The method has the advantages of being high in measurement precision, high in processing speed and the like.
Description
technical field [0001] The invention belongs to the field of industrial measurement, and relates to a method for measuring the position of an oil-water interface, in particular to a CCD-based method for measuring the position of the oil-water interface. Background technique [0002] Liquid interface detection, especially oil-water interface detection, has a wide range of applications in petrochemical, chemical, sewage treatment and other fields. Existing detection methods have achieved various methods of oil-water interface measurement with the help of electronics, ultrasonic, optical fiber sensing and other technologies. Compared with traditional methods, they have made great progress in terms of measurement accuracy and timeliness, but they still have their own advantages and disadvantages. lack of. The capacitive oil-water interface detection method inserts a metal tube into the metal container as an electrode. The metal container, the metal tube and the liquid in the m...
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Inventor 孙杰李岳峰任皓吴海强郑龙洋
Owner TIANJIN UNIVERSITY OF TECHNOLOGY