Laser instrument for measuring sand in water
A technology of sand measuring instrument and laser, which is applied in the field of measuring instruments, can solve the problems of affecting measurement accuracy, optical noise, and increased inconvenience of measurement, and achieve good measurement results
Inactive Publication Date: 2009-09-02
STATE OCEAN TECH CENT
View PDF1 Cites 17 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] The LISST-100 laser particle size analyzer measures a large water body, but there are the following main problems: 1. Stray light easily enters the photoelectric receiver through the sealed window to form optical noise, which affects the measurement accuracy; 2. In order to change the measurement range, it must be replaced. Fourier lenses with different focal lengths add inconvenience to the measurement
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
[0038] Specific embodiments of the present invention will now be described in conjunction with the accompanying drawings. image 3 It is a schematic diagram of the body structure of the underwater laser sand measuring instrument.
[0039] Such as image 3 As shown, the underwater laser sand measuring instrument of the present invention is composed of an underwater machine and an above-water computer. The underwater machine is a cylindrical structure, including an upper body 19 and a lower body 25 . The junction of the upper body 19 and the lower body 25 is an installation cover 23, and the upper body 19 and the lower body 25 are inserted into the upper and lower cylindrical sleeve casings. A sample cell 20 and an automatic zoom Fourier lens 21 are fixed in the installation cover 23 . The installation cover 23 has a water hole 22 in communication with the sample pool 20, and the upper and lower side walls of the sample pool 20 are transparent windows.
[0040] An end cover ...
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 laser instrument for measuring sand in water, which comprises a subwater machine and an overwater computer. The laser instrument for measuring sane in water is used for measuring the partical size distribution and the consistency of suspended sand grains in seawater on the spot. A laser in the subwater machine emits light under the timed automatic control of a control circuit and lightens a water body in a sealed sample cell communicated with the seawater. Scattered light generated by the suspended sand grains in the measured water body is focused on an annular photoelectric receiver positioned on the back focal surface of a Fuller lens through the autozoom Fuller lens. A photosignal outputted by the photoelectric receiver is transmitted into a circuit board, changed into a digital quantity to be stored in a memory by the amplification of a circuit and the A / D conversion, and transmitted to the overwater computer by a digital signal connecting wire with a water tight plug. By treatment, information about the size and the consistency of the suspended sand grains in the seawater is obtained. The laser instrument for measuring sand in water overcomes the influence of stray light to the scattered light of the suspended sand grains and obtains better measuring effect by utilizing the autozoom Fuller lens suitable for different measuring ranges.
Description
technical field [0001] The invention relates to a measuring instrument, in particular to an on-site measuring instrument for measuring the distribution and concentration of low-concentration suspended sand particles in seawater. Background technique [0002] Sediment movement has an important impact on the global environment and the cycle of water and nutrients. Sediment control is the key to river and land governance, and also an important part of offshore marine environment governance. Sediment control requires on-site measurement of sediment data, for this reason, on-site sediment measurement instruments in water have received further attention. [0003] The on-site sediment measuring instrument in water of the prior art has played a role in carrying out on-site sediment measurement. However, there are certain problems in the on-site sediment measuring instruments in water in the prior art, which limits the effect of on-site sediment measurement. [0004] figure 1 It i...
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 Applications(China)
IPC IPC(8): G01N15/02G01N15/06
Inventor 于连生宋家驹唐宏寰刘启海
Owner STATE OCEAN TECH CENT