Linear array CCD transmission type liquid level measuring device
A liquid level measurement and measurement device technology, which is applied in the direction of measurement devices, liquid/fluid solid measurement, lubrication indicator devices, etc., can solve the problems of high requirements for line light sources, limited application range, and prone to errors
Inactive Publication Date: 2010-06-02
HARBIN ENG UNIV
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The structure of this method is relatively simple, but since the glass tube itself is a lens, there needs to be a certain distance between the linear array CCD and the glass tube, which is prone to errors
In addition, the requirements for line light sources are relatively high, and the scope of use is limited
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] combine figure 1 The linear array CCD transmissive liquid level measuring device includes LED point light source 3 and transparent protective cover 4, airtight box 7, linear array CCD 6, circuit unit 8 (including: CCD drive, data acquisition and processing and data transmission functions), line The array CCD6 is embedded in a slot with the same width as the width of the CCD chip on one side of the airtight box 7, and the gap between the slot and the CCD6 is sealed on both sides inside and outside the airtight box 7, and at the same time, the protective glass of the CCD6 is slightly protruded. This side of airtight casing 7. Place the airtight box 7 in the container 12 containing the liquid 2 to be measured (or close to the side wall of the container), and make the linear CCD vertical to the horizontal plane, while the liquid level 1 is in the middle of the photosensitive area of the linear CCD. At the time, due to the wetting effect, the liquid will produce a tiny co...
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 PUM
Login to View More Abstract
The invention discloses a transmission-type liquid level measuring method based on a linear array CCD and a measuring device. The method adopts infiltration effect and other border effects of objects,forms a transmissive relation with the linear array CCD through a point light source, and obtains output values with different pixel strengths of CCD; and the values can directly reflect the characteristics of the liquid level, and if the data are subjected to further processing, high-precision liquid level measured values can be obtained. The method is an optical liquid level measuring method without an optical imaging lens, has the advantages of little influence on precision caused by temperature and concentration change of liquid, relatively simple structure, easy placement, capability ofworking in corrosive and other severe industrial environments and so on; and non-contact measurement can be realized if a receiving device is placed on the outside of a transparent container.
Description
(1) Technical field [0001] The invention relates to a liquid level measuring method and device, in particular to a linear array CCD-based transmissive liquid level measuring method and a measuring device. (2) Background technology [0002] Liquid level is one of the most important and commonly measured parameters in industrial processes. The measurement of liquid level mainly refers to the position measurement technology of vapor-liquid, liquid-liquid, liquid-solid interface, which is widely used in liquid storage equipment such as chemical industry, petroleum and power plant. The existing liquid level measurement methods include pressure liquid level measurement method, floating liquid level measurement method, capacitive liquid level measurement method and ultrasonic liquid level measurement method, etc., but when the liquid concentration, temperature changes or is restricted by the environment, the above measurement The resolution of the method is low, the error is large...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/292
Inventor 温强李玩幽姜富强黄宗军孙秋华赵言诚王伟强谭爽杨依珍邵永丰
Owner HARBIN ENG UNIV