CN103808311A - Portable near-shore ocean wave observation system and method - Google Patents

Abstract

The invention provides a portable near-shore ocean wave observation system and method. The portable near-shore ocean wave observation system comprises a laser emission module, a laser striation imaging module, an auxiliary information sensing module, an ocean wave factor information extracting module and a power supply module, which are mounted on an observation platform, wherein the ocean wave factor information extracting module is connected with the laser emission module, the laser striation imaging module and the auxiliary information sensing module respectively; the power supply module is used for supplying power to the laser emission module, the laser striation imaging module, the auxiliary information sensing module and the ocean wave factor information extracting module. The portable near-shore ocean wave observation system and method can be used for conveniently and rapidly acquiring near-shore ocean wave factor information in real time, so that an effective detection way for rapidly acquiring the distribution characteristics of near-shore ocean wave factors is provided.

Description

A kind of portable Nearshore Wave recording geometry and method

Technical field

The present invention relates to a kind of nearshore wave recording geometry and method, especially a kind of recording geometry of portable Nearshore Wave and method.

Background technology

Nearshore Wave not only has significant impact to fish production operation, meanwhile, has a strong impact on and restrict the construction of coast protection works, therefore, the real-time monitored of carrying out of Nearshore Wave is had important practical significance.At present, the observation procedure of wave is mainly contained to wave observation radar, buoy observation, wherein, effective observed range of wave observation radar requires as beyond 20 kilometers, bank, because offshore is too near, radar is the blind area in observation; Buoy is laid in beyond several kilometers near bank, and General Requirements offshore distance exceedes 3 kilometers.Therefore, for 3 kilometers of observations with interior Nearshore Wave, lack corresponding observation method and method, particularly portable observation method is almost in blank.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of portable Nearshore Wave recording geometry and method that can Real-Time Monitoring nearshore wave key element.

In order to solve the problems of the technologies described above, the invention provides a kind of portable Nearshore Wave recording geometry, comprise the laser emitting module being arranged on observation platform, laser light striped image-forming module, supplementary sensing module, ocean wave factor information extraction modules and power module, laser emitting module is connected with ocean wave factor information extraction modules, the power control signal sending for receiving ocean wave factor information extraction modules, and to offshore emission of sea surface rectangular laser striped, laser light striped image-forming module is connected with ocean wave factor information extraction modules, the focus control signal sending for receiving ocean wave factor information extraction modules, and gather the rectangular laser striped of offshore sea surface reflection, the rectangular laser striped of collection is sent to ocean wave factor information extraction modules in digital picture mode simultaneously, supplementary sensing module is connected with ocean wave factor information extraction modules, for gathering the angle of pitch and the roll angle information of true north azimuth and observation platform, and the information of collection is sent to ocean wave factor information extraction modules, ocean wave factor information extraction modules according to receive information to laser emitting module and laser light striped image-forming module transmitting power control signal and focus control signal, and extract the center information of digital picture that laser light striped image-forming module sends, the height apart from sea level in conjunction with observation platform again, distance between laser emitting module and laser light striped image-forming module, angle between laser emitting module and laser light striped image-forming module, the angle of pitch of observation platform and roll angle information, the image distance of laser light striped image-forming module internal imaging and true north azimuth calculate height and the direction key element of reflection spot wave, power module is respectively laser emitting module, laser light striped image-forming module, supplementary sensing module and ocean wave factor information extraction modules provide power supply.

Adopt ocean wave factor information extraction modules control laser emitting module and laser light striped image-forming module, the optical maser wavelength control that realization is launched laser emitting module and the focus controlling of laser light striped image-forming module, and the information that can send according to laser light striped image-forming module and supplementary sensing module calculate height and the direction key element of Nearshore Wave, this integrated portable structure can be convenient, obtain Nearshore Wave element information fast, in real time, for quick obtaining Nearshore Wave element distribution feature provides a kind of effective test platform.

As further restriction scheme of the present invention, laser emitting module comprises laser instrument, laser transmission circuit, constant temperature control circuit and the power adjustable controller of series connection successively, laser instrument is used for to offshore emission of sea surface rectangular laser striped, laser transmission circuit is for drive laser, constant temperature control circuit is for controlling the temperature of laser instrument, power adjustable controller is connected with ocean wave factor information extraction modules, the power control signal sending for receiving ocean wave factor information extraction modules, and provide controllable power source for constant temperature control circuit.The temperature that adopts constant temperature control circuit control laser emitting module, makes laser emitting module have constant temperature working environment, does not drift about thereby make to swash light wavelength.

As further restriction scheme of the present invention, supplementary sensing module comprises three-dimensional electronic compass, and three-dimensional electronic compass is for gathering the angle of pitch and the roll angle information of true north azimuth and observation platform.Adopt three-dimensional electronic compass acquisition angles information for the height of Nearshore Wave and the calculating of direction key element.

As further restriction scheme of the present invention, supplementary sensing module also comprises stadimeter, GPS locating module and hub, stadimeter is for gathering the distance on observation platform and bank, GPS locating module is for gathering the coordinate information of observation platform, hub is connected with three-dimensional electronic compass, stadimeter and GPS locating module respectively, for the information of reception is sent to ocean wave factor information extraction modules.Adopt stadimeter to gather the distance on observation platform and bank, adopt GPS locating module to gather the coordinate information of observation platform, the observing environment of Nearshore Wave is added up.

As further restriction scheme of the present invention, laser light striped image-forming module comprises narrow-band filtering module, adjustable focal length camera lens and CCD photo-sensitive cell, the rectangular laser striped of reflection is obtained by the perception of CCD photo-sensitive cell more successively after narrow-band filtering module and adjustable focal length camera lens, narrow-band filtering module is for carrying out filtering to the rectangular laser striped of reflection, the focus control signal that adjustable focal length camera lens sends for receiving ocean wave factor information extraction modules, the focal length of adjustable lens, make the rectangular laser striped of reflection by the perception of CCD photo-sensitive cell, CCD photo-sensitive cell is connected with ocean wave factor information extraction modules, obtain rectangular laser stripe pattern information for perception, and this image information is sent to ocean wave factor information extraction modules in digital picture mode.Adopt the narrow-band filtering module light signal of its all band of filtering to greatest extent, adopt adjustable focal length camera lens effectively to focus, make rectangular laser striped image quality higher.

As further restriction scheme of the present invention, ocean wave factor information extraction modules comprises master controller, striations image pretreatment module, the real-time display module of striations image, light stripe center extraction module, ocean wave factor inverting module and ocean wave factor display module, master controller is connected with striations image-forming module with laser emitting module, for transmitting power control signal and focus control signal, striations image pretreatment module is connected with striations image-forming module, the digital picture gathering for receiving striations image-forming module, and this digital picture is done to the pre-service of Nonlinear Two-Dimensional medium filtering, the real-time display module of striations image is connected with striations image pretreatment module, for showing in real time pretreated digital picture, light stripe center extraction module is connected with striations image pretreatment module, height for INTEGRATED SIGHT platform apart from sea level, distance between laser emitting module and laser light striped image-forming module, angle between laser emitting module and laser light striped image-forming module, the angle of pitch of observation platform and roll angle information, the image distance of laser light striped image-forming module internal imaging and true north azimuth calculate height and the direction key element of reflection spot wave, ocean wave factor display module is connected with ocean wave factor information inverting module, for showing wave height and the direction key element that ocean wave factor information inverting module calculates.Adopt main controller controls laser emitting module and striations image-forming module, can carry out better system coordination, adopt ocean wave factor inverting module can calculate the element information that obtains Nearshore Wave.

As further restriction scheme of the present invention, power module comprises anti-reverse module, Real-Time Monitoring module and power supply, anti-reverse module is connected with laser sending module, supplementary sensing module, striations image-forming module and ocean wave factor information extraction modules respectively, connect and cause on the contrary the module damage being attached thereto because of both positive and negative polarity for preventing, Real-Time Monitoring module is connected between anti-reverse module and power supply, for Real-Time Monitoring supply voltage.Adopt anti-reverse module effectively to prevent because both positive and negative polarity connects and causes on the contrary the module damage being attached thereto, adopt the Real-Time Monitoring module can Real-Time Monitoring supply voltage, when supply voltage is during lower than certain threshold value, parting system be connected with power supply.

The present invention also provides a kind of method for portable Nearshore Wave recording geometry, comprises the steps:

Step 1, by ocean wave factor information extraction modules to laser emitting module transmitting power control signal, again by laser emitting module according to receive power control signal to offshore emission of sea surface rectangular laser striped, supplementary sensing module gathers the angle of pitch and the roll angle information of true north azimuth and observation platform simultaneously, and the information of collection is sent to ocean wave factor information extraction modules;

Step 2, send focus control signal by ocean wave factor information extraction modules to laser light striped image-forming module, the rectangular laser striped that is gathered again offshore sea surface reflection by laser light striped image-forming module sends to ocean wave factor information extraction modules by the rectangular laser striped of collection in digital picture mode simultaneously;

Step 3, extracted the center information of the digital picture that laser light striped image-forming module sends by ocean wave factor information extraction modules, then calculate height and the direction key element of reflection spot wave in conjunction with observation platform apart from the image distance of the angle of pitch of the angle between distance, laser emitting module and laser light striped image-forming module between height, laser emitting module and the laser light striped image-forming module on sea level, observation platform and roll angle information, laser light striped image-forming module internal imaging and true north azimuth.

Adopt the method to realize the observation to Nearshore Wave, can provide a kind of effectively means for 3 kilometers of observations with interior Nearshore Wave, filled up for 3 kilometers of blank with the observation procedure of interior Nearshore Wave.

Beneficial effect of the present invention is: laser emitting module, laser light striped image-forming module, supplementary sensing module, ocean wave factor information extraction modules and power module are arranged on same observation platform, can facilitate observation personnel to carry, provide a kind of effective observation method for 3 kilometers with interior Nearshore Wave observation.

Accompanying drawing explanation

Fig. 1 is system architecture schematic diagram of the present invention;

Fig. 2 is internal system modular structure schematic diagram of the present invention;

Fig. 3 is that process flow diagram is extracted in digital picture of the present invention center;

Fig. 4 is ocean wave factor computation model of the present invention;

Fig. 5 is the imaging schematic diagram of striations image-forming module of the present invention;

Fig. 6 is Nearshore Wave observation procedure process flow diagram of the present invention.

Embodiment

As illustrated in fig. 1 and 2, the portable Nearshore Wave recording geometry of one provided by the present invention, comprise the laser emitting module 1 being arranged on observation platform, laser light striped image-forming module 2, supplementary sensing module 3, ocean wave factor information extraction modules 4 and power module, laser emitting module 1 is connected with ocean wave factor information extraction modules 4, for receiving the power control signal that ocean wave factor information extraction modules 4 sends, and to offshore emission of sea surface rectangular laser striped, laser light striped image-forming module 2 is connected with ocean wave factor information extraction modules 4, for receiving the focus control signal that ocean wave factor information extraction modules 4 sends, and gather the rectangular laser striped of offshore sea surface reflection, the rectangular laser striped of collection is sent to ocean wave factor information extraction modules 4 in digital picture mode simultaneously, supplementary sensing module 3 is connected with ocean wave factor information extraction modules 4, for gathering the angle of pitch and the roll angle information of true north azimuth and observation platform, and the information of collection is sent to ocean wave factor information extraction modules 4, ocean wave factor information extraction modules 4 is according to the signal transmitting power control signal and the focus control signal that receive, and extract the center information of the digital picture that laser light striped image-forming module 2 sends, the height apart from sea level in conjunction with observation platform again, distance between laser emitting module 1 and laser light striped image-forming module 2, angle between laser emitting module 1 and laser light striped image-forming module 2, the angle of pitch of observation platform and roll angle information, the image distance of laser light striped image-forming module 2 internal imagings and true north azimuth calculate height and the direction key element of reflection spot C place wave, power module is respectively laser emitting module 1, laser light striped image-forming module 2, supplementary sensing module 3 and ocean wave factor information extraction modules 4 provide power supply.

This system, in the time of work, first provides power supply by power module to laser emitting module 1, laser light striped image-forming module 2, supplementary sensing module 3 and ocean wave factor information extraction modules 4; Again by ocean wave factor information extraction modules 4 to laser emitting module 1 transmitting power control signal, laser emitting module 1 is receiving after power control signal, to offshore emission of sea surface rectangular laser striped, offshore sea enters laser light striped image-forming module 2 at reflection spot C place by rectangular laser streak reflex, ocean wave factor information extraction modules 4 sends focus control signal to laser light striped image-forming module 2 simultaneously, and the rectangular laser striped of reflection can be imaged completely; By laser light striped image-forming module 2, the rectangular laser striped of collection is sent to ocean wave factor information extraction modules 4 in digital picture mode again, the angle of pitch of the collection true north azimuth of collection and observation platform and roll angle information are sent to ocean wave factor information extraction modules 4 by supplementary sensing module 3 simultaneously; Finally extracted the center information of the digital picture that laser light striped image-forming module 2 sends by ocean wave factor information extraction modules 4, then calculate height and the direction key element of reflection spot C place wave in conjunction with observation platform apart from the image distance of the angle of pitch of the angle between distance, laser emitting module 1 and laser light striped image-forming module 2 between height, laser emitting module 1 and the laser light striped image-forming module 2 on sea level, observation platform and roll angle information, laser light striped image-forming module 2 internal imagings and true north azimuth.

As shown in Figure 2, laser emitting module 1 comprises laser instrument, laser transmission circuit, constant temperature control circuit and the power adjustable controller of series connection successively, laser instrument is used for to offshore emission of sea surface rectangular laser striped, laser transmission circuit is for drive laser, constant temperature control circuit is for controlling the temperature of laser instrument, power adjustable controller is connected with ocean wave factor information extraction modules, the power control signal sending for receiving ocean wave factor information extraction modules, and provide controllable power source for constant temperature control circuit.When power adjustable controller receives after the power control signal that ocean wave factor information extraction modules 4 sends, by the power of power adjustable controller regulating thermostatic control circuit, make laser emitting module 1 there is constant temperature working environment, thereby sharp light wavelength when laser emitting module 1 is worked is not drifted about; Again by laser transmission circuit drive laser to offshore emission of sea surface rectangular laser striped.According to research and practice experience, the operation wavelength of laser instrument is set as two kinds of 808nm and 915nm by the present invention, emission angle is less than 0.1rad/m, and the operating temperature range of laser emitting module 1 is set as-10 ℃～55 ℃, be no more than ± 1 nanometer of peak wavelength drift when work.

Supplementary sensing module 3 comprises three-dimensional electronic compass, stadimeter, GPS locating module and hub, three-dimensional electronic compass is for gathering the angle of pitch and the roll angle information of true north azimuth and observation platform, wherein, true north azimuth provides fixed northern information for the extraction of sea direction element information, pitching and roll angle provide angle information for the extraction of wave height element information, stadimeter is for gathering the range information on observation platform and bank, GPS locating module is for gathering the coordinate information of observation platform, hub respectively with three-dimensional electronic compass, stadimeter is connected with GPS locating module, for the information of reception is sent to ocean wave factor information extraction modules.Adopt angle information, range information and the coordinate information of three-dimensional electronic compass, stadimeter and GPS locating module real-time acquisition system, then the information exchange of collection is crossed to hub send to together ocean wave factor information extraction modules 4.

Laser light striped image-forming module 2 comprises narrow-band filtering module, adjustable focal length camera lens and CCD photo-sensitive cell, the rectangular laser striped of reflection is obtained by the perception of CCD photo-sensitive cell more successively after narrow-band filtering module and adjustable focal length camera lens, narrow-band filtering module is for carrying out filtering to the rectangular laser striped of reflection, the focus control signal that adjustable focal length camera lens sends for receiving ocean wave factor information extraction modules, the focal length of adjustable lens, make the rectangular laser striped of reflection by the perception of CCD photo-sensitive cell, CCD photo-sensitive cell is connected with ocean wave factor information extraction modules, obtain rectangular laser stripe pattern information for perception, and this image information is sent to ocean wave factor information extraction modules in digital picture mode.In the time that the rectangular laser striped of reflection enters narrow-band filtering module, by by the light signal of its all band of filtering to greatest extent, narrow-band filtering module of the present invention is divided into two kinds of 808nm and 915nm, centre wavelength is respectively 808 ± 1nm and 915 ± 1nm, half-breadth is all 2 ± 0.5nm, and transmitance is all >85%, and cut-off width is all 200-1100nm, the cut-off degree of depth is all <1%, and diameter is all 12.4mm; By adjustable focal length camera lens, filtered rectangular laser striped is focused, the focal range of this adjustable focal length camera lens is 10～300 millimeters again, can be by software control zoom, and return to focal length in the mode of numerical value; Finally by CCD photo-sensitive cell, the rectangular laser striped to defocused is carried out to perception and obtain, and in the mode of digital picture, the rectangular laser striped of collection is sent to ocean wave factor information extraction modules 4.

Ocean wave factor information extraction modules 4 comprises master controller, striations image pretreatment module, the real-time display module of striations image, light stripe center extraction module, ocean wave factor inverting module and ocean wave factor display module, master controller is connected with striations image-forming module with laser emitting module, for transmitting power control signal and focus control signal, striations image pretreatment module is connected with striations image-forming module, the digital picture gathering for receiving striations image-forming module, and this digital picture is done to the pre-service of Nonlinear Two-Dimensional medium filtering, the real-time display module of striations image is connected with striations image pretreatment module, for showing in real time pretreated digital picture, light stripe center extraction module is connected with striations image pretreatment module, for extracting the center information of pretreated digital picture, ocean wave factor information inverting module is connected with supplementary sensing module, height for INTEGRATED SIGHT platform apart from sea level, distance between laser emitting module 1 and laser light striped image-forming module 2, angle between laser emitting module 1 and laser light striped image-forming module 2, the angle of pitch of observation platform and roll angle information, the image distance of laser light striped image-forming module 2 internal imagings and true north azimuth calculate height and the direction key element of reflection spot C place wave, ocean wave factor display module is connected with ocean wave factor information inverting module, for showing wave height and the direction key element that ocean wave factor information inverting module calculates.In the time that ocean wave factor information extraction modules 4 is worked, first by master controller to laser emitting module and striations image-forming module transmitting power control signal and focus control signal, by striations image pretreatment module, the digital picture receiving is done again the pre-service of nonlinear two dimension median filter, and send to the real-time display module of striations image to show in real time pretreated digital picture, utilize Nonlinear Two-Dimensional medium filtering can filtering sea on the interference of other factors to picture quality; Extracted again the center information of pretreated digital picture by light stripe center extraction module; Calculated again height and the direction key element of reflection spot C place wave apart from the image distance of the angle of pitch of the angle between distance, laser emitting module 1 and laser light striped image-forming module 2 between height, laser emitting module 1 and the laser light striped image-forming module 2 on sea level, observation platform and roll angle information, laser light striped image-forming module 2 internal imagings and true north azimuth by ocean wave factor information inverting module synthesis observation platform; Finally show wave height and the direction key element after inverting by ocean wave factor display module.

Power module comprises anti-reverse module, Real-Time Monitoring module and power supply, anti-reverse module is connected with laser sending module, supplementary sensing module, striations image-forming module and ocean wave factor information extraction modules respectively, connect and cause on the contrary the module damage being attached thereto because of both positive and negative polarity for preventing, Real-Time Monitoring module is connected between anti-reverse module and power supply, for Real-Time Monitoring supply voltage.When power positive cathode connects inverse time, anti-reverse module can be burnt fuse automatically, and deenergization connects, and reaches the object of protection detection instrument; In order to understand in real time the voltage status of system power supply, adopt Real-Time Monitoring module to monitor power supply, when supply voltage is during lower than 12v, by Real-Time Monitoring module deenergization, system quits work.

As shown in Figure 3, light stripe center extraction module adopts gray grads method to carry out center extraction to the digital picture gathering, and concrete steps comprise:

Step 1, digital picture center is definite roughly, first the moving window of using 1 × 3 pixel in digital picture by line slip, according to threshold value and constraint condition, calculate 3 pixels that intensity profile satisfies condition under moving window gray scale and, when the gray scale of lower 3 pixels of moving window with while getting maximal value, this window center position is the rough position at light belt center on this row pixel;

Step 2, low-pass filtering and power transform, in the left and right of rough position, according to the width range of light belt, get the pixel region of certain width as the rough width range of light belt on this row, and the grey scale pixel value within the scope of this is carried out to low pass smothing filtering and power transform, reduce the unshapeliness skewed distribution of gray scale and the impact that high frequency noise extracts light belt center;

Step 3, determines light belt border gray threshold, according to the gray-scale value in the light belt rough range after low-pass filtering and power transform, determines the gray threshold of light belt boundary by adaptive threshold method, obtains the accurate border of light belt;

Step 4, digital picture center accurate Calculation, pixel in light belt border is carried out to gradient center of gravity calculation, can obtain the light belt central point sub-pixel location on this row, every a line pixel in digital picture is carried out to above step and can calculate the light belt center position in every a line, thereby obtain the light belt center of digital picture.

As shown in Figure 4, take O ' point as initial point, set up three-dimensional system of coordinate, B point is laser emitting module 1 and supplementary sensing module 3 positions, A point is striations image-forming module 2 positions, the center that O point is observation platform, it is the mid point of AB, C point is rectangular laser streak reflex point position on offshore sea, make plane CDEF with the height at C point place and be parallel to sea level C, D, E, F, , OO, perpendicular to plane CDEF, H is the height on observation platform center position sea level, be OO, length, b is the distance between laser emitting module 1 and striations image-forming module 2, γ, а represents the angle of pitch and the roll angle of the observation platform that auxiliary perception information module 3 obtains, δ is C point place's incident ray and the angle of reflection ray in ABC plane, BE ⊥ plane CDEF, and ED ∥ CF, CD ⊥ plane BED, CF ⊥ plane BEF, AB ⊥ plane BCF, so order:

OO′|＝H,|CC′|＝|DD′|＝|EE′|＝|FF′|＝h,|AB|＝b （1）

:

$\left|\mathrm{BE}\right|=H+\frac{b}{2}\sin \mathrm{\&gamma;}-h---\left(2\right)$

|DE|＝|CF|＝|BE|tanα （3）

|EF|＝|CD|＝|BE|tanγ （4）

|BF|＝|BE|/sinγ （5）

$\left|\mathrm{BC}\right|={\left|\mathrm{BF}\right|}^2+{\left|\mathrm{CF}\right|}^2=\left|\mathrm{BE}\right|\sqrt{1/{\cos }^2\mathrm{\&gamma;}1{\tan }^2\mathrm{\&alpha;}}---\left(6\right)$

Make again:

$R=\sqrt{1/{\cos }^2\mathrm{\&gamma;}+1/{\tan }^2\mathrm{\&alpha;}}---\left(7\right)$

:

|BC|＝|BE|/R （8）

$h=H-(\frac{\mathrm{Rb}}{\tan \mathrm{\&delta;}}-\frac{\sin \mathrm{\&gamma;}}{2})b---\left(10\right)$

As shown in Figures 4 and 5, investigate striations image-forming module 2 inner cases, P point is the center of adjustable focal length camera lens, L is object distance PI length, d is image distance PP ' length, and f is lens focus, and AG is imaging surface, θ is the angle between striations image-forming module 2 and laser emitting module 1, PI is the optical axis of camera lens, and PI is perpendicular to CI and AG, and x is laser stripe picture centre position, be the distance of imaging point A apart from optical axis PI:

$\frac{x}{d}=\tan (\mathrm{\&delta;}-\mathrm{\&theta;})---\left(11\right)$

$\frac{1}{L}+\frac{1}{d}=\frac{1}{f}---\left(12\right)$

$\mathrm{CI}=\frac{\mathrm{xL}}{d}---\left(13\right)$

$\mathrm{CK}=\mathrm{CG}-\mathrm{CI}\tan \mathrm{\&theta;}=L+d-\frac{\mathrm{xL}}{d}---\left(14\right)$

$\mathrm{CM}=L-\mathrm{KG}=L-\frac{\mathrm{xL}}{d}\tan -\mathrm{\&theta;}--\left(15\right)$

Order: BP '=b ₀, PM '=b=b ₀-dsin θ:

${\mathrm{MM}}^{\&prime;}=b_0-d\sin \mathrm{\&theta;}-\frac{\mathrm{xL}}{d\cos \mathrm{\&theta;}}---\left(16\right)$

$\mathrm{KB}=b_0-\frac{\mathrm{xL}}{d\cos \mathrm{\&theta;}}---\left(17\right)$

MM'/KB＝CM/CK （18）

By (14), (15), (16), (17) substitution (18) formula:

d ²sinθ+d(Lsinθ-b ₀)+xLcosθ＝0 （19）

By (12) formula:

$L=\frac{\mathrm{df}}{d-f}---\left(20\right)$

By in (20) formula substitution (19) formula:

d ²sinθ-b ₀d+b ₀f+xfcosθ＝0 （21）

Formula (21) is solved:

$d=b_0\&PlusMinus;\sqrt{{b_0}^2-4(b_{0}f+\mathrm{xf}\cos \mathrm{\&theta;})\sin \mathrm{\&theta;}}/2\sin \mathrm{\&theta;}$

Get:

By (22) substitution (20):

$L=b_{0}f-f\sqrt{{b_0}^2-4(b_{0}f+\mathrm{xf}\cos \mathrm{\&theta;})\sin \mathrm{\&theta;}}/(b_0-2f\sin \mathrm{\&theta;}-\sqrt{{b_0}^2-4(b_{0}f+\mathrm{xf}\cos \mathrm{\&theta;})\sin })---\left(23\right)$

Again because:

By in (20) formula substitution (24) formula:

$L=\frac{(x+b/\cos \mathrm{\&theta;})f}{x+f\tan \mathrm{\&theta;}}$

By (11) formula, obtain again:

$\tan \mathrm{\&delta;}=\frac{x+d\tan \mathrm{\&theta;}}{d-x\tan \mathrm{\&theta;}}---\left(25\right)$

Formula (25) is updated to (10) formula, obtains unrestrained high element information and be:

$h=H-(\frac{d-x\tan \mathrm{\&theta;}}{x+d\tan \mathrm{\&theta;}}\sqrt{1/{\cos }^2\mathrm{\&gamma;}+1/{\tan }^2\mathrm{\&alpha;}}-\frac{\sin \mathrm{\&gamma;}}{2})b---\left(26\right)$

According to true north azimuth, by the image that observation does not obtain in the same time, obtain Nearshore Wave direction element information again.

First the tangent value that, calculates angle between 2 of adjacent moment is:

$\frac{\&PartialD;h}{\&PartialD;x}=\frac{\mathrm{\&Delta;h}}{\mathrm{\&Delta;x}}=\frac{b[d(x_2-x_1)-d{\tan }^2\mathrm{\&theta;}(x_2+x_1)]}{x_1+x_2+d(x_1+x_2)\tan \mathrm{\&theta;}+d^2{\tan }^2\mathrm{\&theta;}}\sqrt{1/{\cos }^2\mathrm{\&gamma;}+1/{\tan }^2\mathrm{\&alpha;}}---\left(27\right)$

Wherein, x ₁and x ₂be respectively t ₁and t ₂the center of laser stripe image when moment, Δ h is t ₁and t ₂the high difference of wave of calculating when moment, Δ x is corresponding to t ₁and t ₂x when moment ₁and x ₂difference, then, the information of true north azimuth Φ is taken into account, obtain wave to being:

$\mathrm{\&Omega;}=\mathrm{arctg}\left\{\frac{d(x_2-x_1)-d{\tan }^2\mathrm{\&theta;}(x_2+x_1)}{x_1{x}_2+d(x_1+x_2)\tan \mathrm{\&theta;}+d^2{\tan }^2\mathrm{\&theta;}}\sqrt{1/{\cos }^2\mathrm{\&gamma;}+1/{\tan }^2{\mathrm{\&alpha;}}^b}\right\}+\mathrm{\&Phi;}---\left(28\right)$

Wherein, x ₁and x ₂be respectively t ₁and t ₂the center of laser stripe image when moment, Φ is true north azimuth.

As shown in figs. 1 and 6, the present invention, for the method for portable Nearshore Wave recording geometry, comprises the steps:

Step 1, by ocean wave factor information extraction modules 4 to laser emitting module 1 transmitting power control signal, again by laser emitting module 1 according to receive power control signal to offshore emission of sea surface rectangular laser striped, supplementary sensing module 3 gathers the angle of pitch and the roll angle information of true north azimuth and observation platform simultaneously, and the information of collection is sent to ocean wave factor information extraction modules 4;

Step 2, send focus control signal by ocean wave factor information extraction modules 4 to laser light striped image-forming module 2, the rectangular laser striped that is gathered again offshore sea surface reflection by laser light striped image-forming module 2 sends to ocean wave factor information extraction modules 4 by the rectangular laser striped of collection in digital picture mode simultaneously;

Step 3, extracted the center information of the digital picture that laser light striped image-forming module 2 sends by ocean wave factor information extraction modules 4, then calculate height and the direction key element of reflection spot wave in conjunction with observation platform apart from the image distance of the angle of pitch of the angle between distance, laser emitting module 1 and laser light striped image-forming module 2 between height, laser emitting module 1 and the laser light striped image-forming module 2 on sea level, observation platform and roll angle information, laser light striped image-forming module 2 internal imagings and true north azimuth.

Adopt the method to realize the observation to Nearshore Wave, can provide a kind of effectively means for 3 kilometers of observations with interior Nearshore Wave, filled up for 3 kilometers of blank with the observation procedure of interior Nearshore Wave.

Claims (8)

1. a portable Nearshore Wave recording geometry, it is characterized in that: comprise the laser emitting module being arranged on observation platform, laser light striped image-forming module, supplementary sensing module, ocean wave factor information extraction modules and power module, described laser emitting module is connected with ocean wave factor information extraction modules, the power control signal sending for receiving ocean wave factor information extraction modules, and to offshore emission of sea surface rectangular laser striped, described laser light striped image-forming module is connected with ocean wave factor information extraction modules, the focus control signal sending for receiving ocean wave factor information extraction modules, and gather the rectangular laser striped of offshore sea surface reflection, the rectangular laser striped of collection is sent to ocean wave factor information extraction modules in digital picture mode simultaneously, described supplementary sensing module is connected with ocean wave factor information extraction modules, for gathering the angle of pitch and the roll angle information of true north azimuth and observation platform, and the information of collection is sent to ocean wave factor information extraction modules, described ocean wave factor information extraction modules according to receive information to laser emitting module and laser light striped image-forming module transmitting power control signal and focus control signal, and extract the center information of digital picture that laser light striped image-forming module sends, the height apart from sea level in conjunction with observation platform again, distance between laser emitting module and laser light striped image-forming module, angle between laser emitting module and laser light striped image-forming module, the angle of pitch of observation platform and roll angle information, the image distance of laser light striped image-forming module internal imaging and true north azimuth calculate height and the direction key element of reflection spot wave, described power module is respectively laser emitting module, laser light striped image-forming module, supplementary sensing module and ocean wave factor information extraction modules provide power supply.

2. portable Nearshore Wave recording geometry according to claim 1, it is characterized in that: described laser emitting module comprises the laser instrument of series connection successively, laser transmission circuit, constant temperature control circuit and power adjustable controller, described laser instrument is used for to offshore emission of sea surface rectangular laser striped, described laser transmission circuit is for drive laser, described constant temperature control circuit is for controlling the temperature of laser instrument, described power adjustable controller is connected with ocean wave factor information extraction modules, the power control signal sending for receiving ocean wave factor information extraction modules, and provide controllable power source for constant temperature control circuit.

3. portable Nearshore Wave recording geometry according to claim 1, it is characterized in that: described supplementary sensing module comprises three-dimensional electronic compass, described three-dimensional electronic compass is for gathering the angle of pitch and the roll angle information of true north azimuth and observation platform.

4. portable Nearshore Wave recording geometry according to claim 3, it is characterized in that: described supplementary sensing module also comprises stadimeter, GPS locating module and hub, described stadimeter is for gathering the distance on observation platform and bank, described GPS locating module is for gathering the coordinate information of observation platform, described hub is connected with three-dimensional electronic compass, stadimeter and GPS locating module respectively, for the information of reception is sent to ocean wave factor information extraction modules.

5. portable Nearshore Wave recording geometry according to claim 1, it is characterized in that: described laser light striped image-forming module comprises narrow-band filtering module, adjustable focal length camera lens and CCD photo-sensitive cell, the rectangular laser striped of reflection is obtained by the perception of CCD photo-sensitive cell more successively after narrow-band filtering module and adjustable focal length camera lens, described narrow-band filtering module is for carrying out filtering to the rectangular laser striped of reflection, the focus control signal that described adjustable focal length camera lens sends for receiving ocean wave factor information extraction modules, the focal length of adjustable lens, make the rectangular laser striped of reflection by the perception of CCD photo-sensitive cell, described CCD photo-sensitive cell is connected with ocean wave factor information extraction modules, obtain rectangular laser stripe pattern information for perception, and this image information is sent to ocean wave factor information extraction modules in digital picture mode.

6. portable Nearshore Wave recording geometry according to claim 1, it is characterized in that: described ocean wave factor information extraction modules comprises master controller, striations image pretreatment module, the real-time display module of striations image, light stripe center extraction module, ocean wave factor inverting module and ocean wave factor display module, described master controller is connected with striations image-forming module with laser emitting module respectively, for transmitting power control signal and focus control signal, described striations image pretreatment module is connected with striations image-forming module, the digital picture gathering for receiving striations image-forming module, and this digital picture is done to the pre-service of Nonlinear Two-Dimensional medium filtering, the real-time display module of described striations image is connected with striations image pretreatment module, for showing in real time pretreated digital picture, described light stripe center extraction module is connected with striations image pretreatment module, for extracting the center information of pretreated digital picture, described ocean wave factor information inverting module is connected with supplementary sensing module, height for INTEGRATED SIGHT platform apart from sea level, distance between laser emitting module and laser light striped image-forming module, angle between laser emitting module and laser light striped image-forming module, the angle of pitch of observation platform and roll angle information, the image distance of laser light striped image-forming module internal imaging and true north azimuth calculate height and the direction key element of reflection spot wave, described ocean wave factor display module is connected with ocean wave factor information inverting module, for showing wave height and the direction key element that ocean wave factor information inverting module calculates.

7. portable Nearshore Wave recording geometry according to claim 1, it is characterized in that: described power module comprises anti-reverse module, Real-Time Monitoring module and power supply, described anti-reverse module is connected with laser sending module, supplementary sensing module, striations image-forming module and ocean wave factor information extraction modules respectively, connect and cause on the contrary the module damage being attached thereto because of both positive and negative polarity for preventing, described Real-Time Monitoring module is connected between anti-reverse module and power supply, for Real-Time Monitoring supply voltage.

8. for a method for portable Nearshore Wave recording geometry claimed in claim 1, it is characterized in that: comprise the steps:

Step 1, by ocean wave factor information extraction modules to laser emitting module transmitting power control signal, again by laser emitting module according to receive power control signal to offshore emission of sea surface rectangular laser striped, supplementary sensing module gathers the angle of pitch and the roll angle information of true north azimuth and observation platform simultaneously, and the information of collection is sent to ocean wave factor information extraction modules;

Step 2, send focus control signal by ocean wave factor information extraction modules to laser light striped image-forming module, the rectangular laser striped that is gathered again offshore sea surface reflection by laser light striped image-forming module sends to ocean wave factor information extraction modules by the rectangular laser striped of collection in digital picture mode simultaneously;

Step 3, extracted the center information of the digital picture that laser light striped image-forming module sends by ocean wave factor information extraction modules, then calculate height and the direction key element of reflection spot wave in conjunction with observation platform apart from the image distance of the angle of pitch of the angle between distance, laser emitting module and laser light striped image-forming module between height, laser emitting module and the laser light striped image-forming module on sea level, observation platform and roll angle information, laser light striped image-forming module internal imaging and true north azimuth.

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