CN201653413U - Basic matrix type wave monitoring device - Google Patents

Abstract

The utility model relates to a basic matrix type wave monitoring device, which comprises a fixedly arranged horizontal support frame, wherein at least three water level meters in triangle distribution are arranged on the horizontal support frame, and all of the three water level meters are connected to a computer processing terminal through transmission wires and signal conversion equipment. The water level meters can be laser altitude meters or microwave altitude meters or acoustic altitude meters. When the water level meters are in a simulated signal output mode, measuring results are input to the computer processing terminal through a data collector and a serial port converter. When the water level meters are in a digital signal output mode, serial port expansion equipment is connected on the computer processing terminal, the measuring results of the water level meters are input into the serial port expansion equipment through a serial port protocol. The utility model makes the three water level meters into the triangle basic matrix type, has the wave height, wave period and wave spectrum measuring function of the wave measuring equipment by a conventional wave surface method, and can also use the space distance and included angles among the water level meters and the measured wave propagating time delay for measuring the wave direction, the wave length and the wave speed.

Description

A kind of array type wave monitoring device

Technical field

The utility model relates to a kind of wave monitoring device, particularly about a kind of array type wave monitoring device.

Background technology

The measurement of wave parameters such as wave height, wave direction, period of wave, wavelength, velocity of wave has extremely important meaning and using value to oceanographic engineering construction, marine fishery production, sea transport, marine environmental protection, ocean scientific research and even ocean national defence.

Existing wave measurement method has: acceleration analysis method, pressure application, wavefront measurement method, the corrugated roughness method of inversion etc., wherein other is indirect measurement except that the wavefront measurement method.Equipment based on acceleration analysis and water-pressure survey all needs cloth to be placed in the water, lay difficulty greatly, easily lose, the maintenance cost height.The wavefront measurement method is to utilize the method for measuring the wave surface height variation to measure wave parameter, promptly utilize the probe measurement of level altitude to pop one's head in to the variable in distance of the water surface and realize wave measurement, mostly adopt contactless (remote measurement) as laser, microwave or metering system such as ultrasonic; Wavefront measurement equipment can be installed on the water surface above marine structure such as offshore platform, on the basis of level measuring, realizes tracking that wave surface height is changed by quickening sampling, and it is good therefore to have a security, the characteristics of easy maintenance.But existing application can only realize the measurement of wave height and period of wave in the equipment of wavefront measurement method, and important wave parameters such as energy measurement wave direction, wavelength and velocity of wave not, thereby has limited the application of these instruments.

Summary of the invention

At the problems referred to above, the purpose of this utility model provides a kind of array type wave monitoring device based on the wavefront measurement technology.

For achieving the above object, the utility model is taked following technical scheme: a kind of array type wave monitoring device, it is characterized in that: it comprises a horizontal stand that fixedly installs, three water level gauges that are in triangular distribution are set on horizontal stand at least, and described three water level gauges are on the same level height; Three water level gauges all are connected to the Computer Processing terminal by transmission line and signal conversion equipment.

Described water level is counted one of laser altimeter, microwave altitude gauge, acoustic altimeter.

When described water level was counted the water level gauge of simulating signal output, the measurement result of described water level gauge was linked into described Computer Processing terminal via data acquisition unit and serial converter.

When described water level is counted the water level gauge of digital signal output, on described Computer Processing terminal, insert a serial ports expansion equipment, the measurement result of described water level gauge is imported described serial ports expansion equipment through serial port protocol.

Described serial ports expansion equipment can adopt the serial ports expansion plate.

The utility model is owing to take above technical scheme, and it has the following advantages: 1, the utility model adopts remote mode to carry out wave measurement, and equipment does not need entry, is convenient to install, be difficult for losing, and it is good to have a security, the characteristics of easy maintenance.2, three water level gauges of the utility model are set to the triangular basis configuration, except having the conventional corrugated method survey wave height that wave device possessed, period of wave, wave spectrum measurement function, can also be by the propagation characteristic of wave, the wave propagation time delay of utilizing space length between the array type wave monitoring device middle water level meter and angle and recording records wave direction, wavelength, velocity of wave.The utility model device layout is simple, and it is also simple to survey wave method, is one to have the applicable design of practical value.

Description of drawings

Fig. 1 is the synoptic diagram of the utility model device one embodiment

Fig. 2 is the synoptic diagram of another embodiment of the utility model device

Fig. 3 be wave height, period of wave instrumentation plan

Fig. 4 is the synoptic diagram that ripple is propagated at point-to-point transmission

Fig. 5 is the schematic diagram that utilizes the utility model measurement device wave direction, velocity of wave

Embodiment

Be described in detail of the present utility model below in conjunction with drawings and Examples.

As shown in Figure 1, at least three water level gauges of the utility model utilization are lined up the space basic matrix, form array type wave monitoring device, device comprises following assembly: a horizontal stand that fixedly installs 1 is provided with three high precision water level gauges 2,3,4 at least on horizontal stand 1.Three water level gauges 2,3,4 are in triangular distribution on horizontal stand 1, and because horizontal stand 1 this common installation basis is arranged, are on the same level height so guaranteed three water level gauges 2,3,4.

Three water level gauges 2,3,4 all are connected to long-range Computer Processing terminal 6 by cable 5 and necessary signal conversion equipment.Water level gauge collects the ripple signal, is sent to the Computer Processing terminal after acquisition process, carries out computing, finally provides wave parameters such as wave height, wave direction, period of wave, velocity of wave, wavelength.

According to the difference of water level gauge output signal type, the conversion of signals that can adopt has two kinds of different concrete modes:

1) for utilizing serial ports directly to export the water level gauge of digital signal, can on Computer Processing terminal 6, insert serial ports expansion equipment 7 (can adopt Moxa PC104 serial ports expansion plate), as shown in Figure 1, the measurement result of three water level gauges is directly via the RS232 interface on the water level gauge (when transmission range is far away, can select RS422 or RS485) by three input ends of cable access serial ports expansion equipment 7, enter data into terminal 6 by serial ports expansion equipment 7 again and be for further processing.Water level gauge for other interface shape output level measuring data can insert terminal devices such as computing machine by its interface requirement, does not do at this and gives unnecessary details.

2) water level gauge of exporting for simulating signal, can be with the water level gauge output signal directly by cable 5 input data acquisition units 8 (can adopt CR1000), as shown in Figure 2, data acquisition unit 8 is converted into digital signal, inserting Computer Processing terminal 6 by RS232 interface on the data acquisition unit (when transmission range is far away, can select RS422 or RS485) or network interface by cable again is for further processing.

Above-mentioned water level gauge can be laser altimeter, or the microwave altitude gauge, or commercially produced product such as acoustic altimeter.

In the reality, horizontal stand 1 can be arranged on offshore platform or other marine structures, and water level gauge is mounted thereon.

All have sensor on the conventional water level gauge, for simple measurement wave height and period of wave, utilize any one water level gauge in theory, by measuring the difference in height between crest and the trough, and the mistiming of adjacent two crests or trough arrival, can independent measurement go out wave height and period of wave.Therefore measure for wave height and period of wave, only need a water level gauge to get final product, all the other two water level gauge measurement results can be used as quality control as redundancy.If but also to measure parameters such as wave direction, velocity of wave, then need just energy measurement of three water level gauges at least.

Utilize the method for array type wave monitoring device measurement wave parameter as follows:

1, the measurement of wave height, period of wave.

Utilize any water level gauge, water surface elevation is carried out continuous coverage, according to water surface elevation curve over time, as shown in Figure 3, the discrepancy in elevation between crest and the trough is wave height H, and the mistiming between adjacent peaks or the trough is wave period T ₀

2, the measurement of wave direction, velocity of wave, wavelength.

1) according to the principle of cross correlation measurement signal propagation delay, calculate the time of efferent echo by water level gauge 1 arrival water level gauge 2, and the time that arrives water level gauges 3 by water level gauge 2.

Engineering circle is usually utilized cross-correlation method measuring-signal time delay.Cross correlation function has reflected the similarity degree of two signals.As shown in Figure 4, when a train wave was transmitted to the B point by the A point, the waveform that waveform that the A point records and B point record was on all four, also was that correlativity between them is very high, and both just differ a time-delay τ _AB.Utilize following formula that two signals are asked relevant, the related function of trying to achieve is the function of time difference τ, when τ equals τ _ABThe time, correlation function value is maximum.Also be the related function value when maximum the time difference τ of correspondence equal ripple and be transmitted to the time delay τ that B is ordered from the A point _ABFinding the solution relational expression is:

$R_{\mathrm{AB}}\left(\mathrm{\τ}\right)=\frac{1}{T}{\∫}_{-T}^T{f}_A\left(t\right)\×f_B(t+\mathrm{\τ})\×\mathrm{dt}---\left(1\right)$

Suppose that a train wave wave order the B point along wave direction shown in Figure 5 by A and reach the C point again, the poor at that time τ that is respectively _ABAnd τ _AC, the signal that can record according to three water level gauges respectively obtains as cross correlation process:

$R_{\mathrm{AB}}\left({\mathrm{\τ}}_{\mathrm{AB}}\right)=\frac{1}{T}{\∫}_{-T}^T{f}_A\left(t\right)\×f_B(t+{\mathrm{\τ}}_{\mathrm{AB}})\×\mathrm{dt}---\left(2\right)$

$R_{\mathrm{AC}}\left({\mathrm{\τ}}_{\mathrm{AC}}\right)=\frac{1}{T}{\∫}_{-T}^T{f}_A\left(t\right)\×f_C(t+{\mathrm{\τ}}_{\mathrm{AC}})\×\mathrm{dt}---\left(3\right)$

Wherein, T is the signal measurement time.Calculate τ by above-mentioned (2), (3) formula _ABAnd τ _AC

2) according to τ _ABAnd τ _AC, calculate wave direction, velocity of wave, wavelength.

As shown in Figure 5, establish water level gauge 2,3,4 and form triangular array on same surface level, location point is respectively A, B, C, and 2 distances of A, B are L _AB, can measure; 2 distances of A, C are L _AC, can measure; Angle between AB and the AC is α, can measure; Wave propagation direction and Y-axis angle are θ, i.e. wave direction; Wave celerity is c; Cycle is T ₀(because T ₀Being recorded by single-sensor, is known quantity in following derivation); Wavelength is λ.Then:

c×τ _AB＝L _AB×sinθ (4)

c×τ _AC＝L _AC×cos(90°-θ-α)＝L _AC×(sinθ×cosα+cosθ×sinα)(5)

By above-mentioned two solving simultaneous equations, obtain:

Wave direction: $\mathrm{\θ}=\arctan \left(\frac{L_{\mathrm{AC}}+{\mathrm{\τ}}_{\mathrm{AB}}\×\sin \mathrm{\α}}{L_{\mathrm{AB}}\×{\mathrm{\τ}}_{\mathrm{AC}}-L_{\mathrm{AC}}\×{\mathrm{\τ}}_{\mathrm{AB}}\×\cos \mathrm{\α}}\right)---\left(6\right)$

Velocity of wave:

Wavelength: λ=c * T ₀(9)

For simplicity, triangle △ ABC can be designed to interior angle is 60 ° of equilateral triangles that the length of side is L, then

Wave direction: $\mathrm{\θ}=\arctan \left(\frac{\sqrt{3}\×{\mathrm{\τ}}_{\mathrm{AB}}}{2\×{\mathrm{\τ}}_{\mathrm{AC}}-{\mathrm{\τ}}_{\mathrm{AB}}}\right)---\left(10\right)$

The foregoing description only is used to illustrate the utility model; wherein the structure of each parts, connected mode etc. all can change to some extent; every equivalents of carrying out on the basis of technical solutions of the utility model and improvement all should not got rid of outside protection domain of the present utility model.

Claims (5)

1. array type wave monitoring device, it is characterized in that: it comprises a horizontal stand that fixedly installs, and three water level gauges that are in triangular distribution are set on horizontal stand at least, described three water level gauges are on the same level height; Three water level gauges all are connected to the Computer Processing terminal by transmission line and signal conversion equipment.

2. a kind of array type wave monitoring device as claimed in claim 1, it is characterized in that: described water level is counted one of laser altimeter, microwave altitude gauge, acoustic altimeter.

3. a kind of array type wave monitoring device as claimed in claim 1 or 2, it is characterized in that: when described water level was counted the water level gauge of simulating signal output, the measurement result of described water level gauge was linked into described Computer Processing terminal via data acquisition unit and serial converter.

4. a kind of array type wave monitoring device as claimed in claim 1 or 2, it is characterized in that: when described water level is counted the water level gauge of digital signal output, insert a serial ports expansion equipment on described Computer Processing terminal, the measurement result of described water level gauge is imported described serial ports expansion equipment through serial port protocol.

5. a kind of array type wave monitoring device as claimed in claim 4 is characterized in that: described serial ports expansion equipment adopts the serial ports expansion plate.

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