315 行
11 KiB
Python
315 行
11 KiB
Python
# -*- coding: utf-8 -*-
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from os import system
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import numpy as np
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from pyat.AcousticPara import GetEnv, Coord
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from scipy.signal import savgol_filter, medfilt
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from pyat.DataBase import DataBase
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from pyat.readwrite import write_env, write_bathy, read_shd, get_rays
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from pyat.env import Pos, Source, Dom, cInt, SSPraw, SSP, HS, BotBndry, TopBndry, Bndry, Box, Beam
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import matplotlib.pyplot as plt
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from pyat.config import AtBinPath
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file_cz_data = open('cz_data.txt', 'w')
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class CzRangeWidth:
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def __init__(self, minRange, maxRange, width):
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self.minRange = minRange
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self.maxRange = maxRange
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self.width = width
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class CzDetail:
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def __init__(self, descript, directCz, reflectCz):
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self.descript = descript
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self.directCz = directCz
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self.reflectCz = reflectCz
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class CzData:
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def __init__(self, azi, ranges, depths, TL, bathym, Rays, CzDetail):
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self.azi = azi
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self.ranges = ranges
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self.depths = depths
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self.TL = TL
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self.bathym = bathym
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self.Rays = Rays
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self.CzDetail = CzDetail
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def calZmax(ssp, sed):
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d = np.array([],dtype=int)
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for it in range(len(ssp)):
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d=np.append(d,ssp[it].z[-1])
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Zmax =max(d)
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ssp_idx = np.argmax(d)
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return Zmax, ssp_idx
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def call_Bellhop(freq, sd, rd, bathm, ssp, sed, base):
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# Source and receiving position
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filename='cz'
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Rmax = bathm.r[-1] # unit: km
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dr = (1500 / freq) / 1000 # wavelength / 10, unit: km
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ran = np.linspace(0, Rmax, round(Rmax / dr)) # Receiving range (unit: km)
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Zmax, ssp_idx = calZmax(ssp, sed)
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"""RD 已修改 8.26"""
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RD = np.linspace(0, Zmax, round(Zmax/10) + 1)
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pos = Pos(Source(sd), Dom(ran, RD))
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# Range of phase velocity
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cInt.Low = 1400
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cInt.High = 15000
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# The number of media
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NMedia = 1
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ssp_raw = []
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depth = [0]
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# Sound speed profile
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Z = ssp[ssp_idx].z # Depth
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Cp = ssp[ssp_idx].c # Speed of P-wave
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Cs = np.zeros(np.shape(Z)) # Speed of S-wave
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Rho = np.ones(np.shape(Z)) # Density of the media
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Ap = np.zeros(np.shape(Z)) # Attenuation of P-wave
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As = np.zeros(np.shape(Z)) # Attenuation of S-wave
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ssp_raw.append(SSPraw(Z, Cp, Cs, Rho, Ap, As))
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depth.append(Z[-1])
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# Sediment
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if sed != None:
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Z = sed[0].z + ssp[0].z[-1] # Depth
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Cp = sed[0].cp # Speed of P-wave
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Cs = sed[0].cs # Speed of S-wave
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Rho = sed[0].rho # Density of the media
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Ap = sed[0].a_p # Attenuation of P-wave
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As = sed[0].a_s # Attenuation of S-wave
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ssp_raw.append(SSPraw(Z, Cp, Cs, Rho, Ap, As))
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depth.append(Z[-1])
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"""Opt_top 已修改 8.26"""
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Opt_top = 'SVW'
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N = np.zeros(NMedia, np.int8)
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Sigma = np.zeros(NMedia+1)
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sspK = SSP(ssp_raw, depth, NMedia, Opt_top, N, Sigma)
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# Bottom option
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hs = HS(base[0].cp, base[0].cs, base[0].rho, base[0].a_p, base[0].a_s)
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Opt_bot = 'A~'
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bottom = BotBndry(Opt_bot, hs)
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top = TopBndry(Opt_top)
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bdy = Bndry(top, bottom)
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# Beam params
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run_type = 'C' # incoherently sum beams, see AT docs for more info
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nbeams = 0
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alpha = np.linspace(-90, 90, 2) # min and max launch angle -20 degrees to 20 degrees
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box = Box(Zmax, 100) # bound the region you let the beams go, depth in meters and range in km
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deltas = 0 # length step of ray trace, 0 means automatically choose
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beam = Beam(RunType=run_type, Nbeams=nbeams, alpha=alpha, box=box, deltas=deltas) # package
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"""删除ssp 已修改 8.26"""
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# Write *.env file
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write_env(filename + '.env', 'BELLHOP', 'Pekeris profile', freq, sspK, bdy, pos, beam, cInt, Rmax)
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write_bathy(filename,bathm)
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system(AtBinPath + "/bellhop " + filename)
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# Read sound field
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[x, x, x, x, Pos1, pressure] = read_shd(filename + '.shd')
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TL = -10 * np.log10(np.square(np.abs(pressure))) # Transmission Loss
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return Pos1, TL
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def call_Bellhop_Rays(freq, sd, rd, bathm, ssp, sed, base):
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# Source and receiving position
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filename = 'cz_ray'
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Rmax = bathm.r[-1] # unit: km
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dr = (1500 / freq) / 1000 # wavelength / 10, unit: km
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ran = np.linspace(0, Rmax, round(Rmax / dr)) # Receiving range (unit: km)
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Zmax, ssp_idx = calZmax(ssp, sed)
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"""RD 已修改 8.26"""
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RD = np.linspace(0, Zmax, round(Zmax / 10) + 1)
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pos = Pos(Source(sd), Dom(ran, RD))
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# Range of phase velocity
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cInt.Low = 1400
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cInt.High = 15000
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# The number of media
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NMedia = 1
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ssp_raw = []
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depth = [0]
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# Sound speed profile
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Z = ssp[ssp_idx].z # Depth
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Cp = ssp[ssp_idx].c # Speed of P-wave
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Cs = np.zeros(np.shape(Z)) # Speed of S-wave
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Rho = np.ones(np.shape(Z)) # Density of the media
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Ap = np.zeros(np.shape(Z)) # Attenuation of P-wave
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As = np.zeros(np.shape(Z)) # Attenuation of S-wave
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ssp_raw.append(SSPraw(Z, Cp, Cs, Rho, Ap, As))
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depth.append(Z[-1])
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# Sediment
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if sed != None:
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Z = sed[0].z + ssp[0].z[-1] # Depth
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Cp = sed[0].cp # Speed of P-wave
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Cs = sed[0].cs # Speed of S-wave
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Rho = sed[0].rho # Density of the media
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Ap = sed[0].a_p # Attenuation of P-wave
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As = sed[0].a_s # Attenuation of S-wave
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ssp_raw.append(SSPraw(Z, Cp, Cs, Rho, Ap, As))
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depth.append(Z[-1])
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"""Opt_top 已修改 8.26"""
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Opt_top = 'SVW'
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N = np.zeros(NMedia, np.int8)
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Sigma = np.zeros(NMedia + 1)
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sspK = SSP(ssp_raw, depth, NMedia, Opt_top, N, Sigma)
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# Bottom option
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hs = HS(base[0].cp, base[0].cs, base[0].rho, base[0].a_p, base[0].a_s)
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Opt_bot = 'A~'
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bottom = BotBndry(Opt_bot, hs)
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top = TopBndry(Opt_top)
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bdy = Bndry(top, bottom)
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# Beam params
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run_type = 'R' # incoherently sum beams, see AT docs for more info
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nbeams = 301
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alpha = np.linspace(-15, 15, 2) # min and max launch angle -20 degrees to 20 degrees
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box = Box(Zmax, 100) # bound the region you let the beams go, depth in meters and range in km
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deltas = 0 # length step of ray trace, 0 means automatically choose
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beam = Beam(RunType=run_type, Nbeams=nbeams, alpha=alpha, box=box, deltas=deltas) # package
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"""删除ssp 已修改 8.26"""
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# Write *.env file
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write_env(filename + '.env', 'BELLHOP', 'Pekeris profile', freq, sspK, bdy, pos, beam, cInt, Rmax)
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write_bathy(filename, bathm)
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system(AtBinPath + "/bellhop " + filename)
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# Read sound field
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return get_rays(filename + ".ray")
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def find_cvgcRays(rays_total):
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Rays = []
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num_bnc_min = np.Inf
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for ray in rays_total[0]:
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if ray.num_top_bnc + ray.num_bot_bnc < num_bnc_min and max(ray.xy[1,:]) > 100:
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num_bnc_min = ray.num_top_bnc + ray.num_bot_bnc
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for ray in rays_total[0]:
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if ray.num_top_bnc + ray.num_bot_bnc > num_bnc_min + 1:
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continue
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elif max(ray.xy[1,:]) < 100:
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continue
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else:
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Rays.append(ray)
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return Rays
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def call_hjq(r, TL):
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TL_R = 20 * np.log10(r)
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out=[]
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dTL = (TL_R - TL) * (TL <= TL_R)
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dTL[np.isnan(dTL)] = 0
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test_fliter_s = savgol_filter(dTL, 103, 3)
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test_fliter = medfilt(test_fliter_s,13)
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signal=1
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for r_3 in range(len(r)):
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if r[r_3]>30000:
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break
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czrangewidth_list = []
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for i in range(r_3,len(test_fliter)):
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czrangewidth = CzRangeWidth(0,0,0)
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if(test_fliter[i]>=5):
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out.append(i)
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if i+1<len(test_fliter):
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if test_fliter[i+1]<5:
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m = r[out[0]]
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n = r[out[len(out) - 1]]
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l=n-m
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# file_cz_data.write('\n'"会聚区距离：%.1fm"%m +"-%.1fm" %n)
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# file_cz_data.write('\n'"会聚区宽度：%.1fm\n"%l )
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czrangewidth_list.append(CzRangeWidth(m,n,l))
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out.clear()
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signal=0
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else:
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m = r[out[0]]
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n = r[out[len(out) - 1]]
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l = n - m
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# file_cz_data.write('\n'"会聚区距离：%.1fm" % m + "-%.1fm" % n)
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# file_cz_data.write('\n'"会聚区宽度：%.1fm\n" % l )
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czrangewidth_list.append(CzRangeWidth(m,n,l))
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out.clear()
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signal = 0
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# if signal==1:
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# file_cz_data.write('\n'" 没有出现会聚区\n")
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#滤波器效果图：
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#plt.plot(r, TL)
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#plt.plot(r, TL_R)
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# plt.plot(r,dTL)
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# plt.plot(r, test_fliter)
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# plt.gca().invert_yaxis()
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# plt.show()
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return czrangewidth_list
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def call_fangwei(freq, sd, rd, bathm, ssp, sed, base, isPlot=False):
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czdetail = CzDetail("", [], [])
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last=len(ssp[0].c)-1
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# if ssp[0].c[0] > ssp[0].c[last]:
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# file_cz_data.write('\n'"直达会聚区：无")
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# file_cz_data.write('\n'"反射会聚区：")
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# else:
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# file_cz_data.write('\n'"直达会聚区：")
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sed = None
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rays_total = call_Bellhop_Rays(freq, sd, rd, bathm, ssp, sed, base)
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Rays = find_cvgcRays(rays_total)
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[Pos, TL] = call_Bellhop(freq, sd, rd, bathm, ssp, sed, base)
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[x, x, x, x, Pos, pressure] = read_shd('cz.shd')
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TL = -10 * np.log10(np.square(np.abs(pressure))) # Transmission Loss
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# Plot
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if isPlot:
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plt.pcolor(Pos.r.range, Pos.r.depth, TL[0, 0, :, :], vmin=40, vmax=130, cmap='jet_r', shading='auto')
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plt.xlabel("Range/m")
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plt.ylabel("Depth/m")
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plt.gca().invert_yaxis()
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plt.colorbar()
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plt.show()
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czrangewidth_list = call_hjq(Pos.r.range,TL[0, 0, 1,:])
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if ssp[0].c[0] > ssp[0].c[last]:
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czdetail.directCz = []
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czdetail.reflectCz = czrangewidth_list
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else:
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czdetail.directCz = czrangewidth_list
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czdetail.reflectCz = []
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return Pos.r.range, Pos.r.depth, TL[0, 0, :, :], bathm, Rays, czdetail
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def call_cz(database, freq, lat, lon, azi, sourceDepth=10, receiveDepth=10, isPlot=False):
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sd = np.array([sourceDepth]) # Source depth
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rd = np.linspace(0, receiveDepth, 351) # Receiving depth
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results = []
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ranges, depths, TL, bathym, Rays = [], [], [], [], []
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''' 计算单个方向的会聚区 '''
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if azi != None:
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[bathm, ssp, sed, base] = GetEnv(database, 25, Coord(lon, lat), R=100, azi=azi)
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if np.mean(bathm.d) < 2000:
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return results
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else:
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ranges, depths, TL, bathym, Rays, czdetail = call_fangwei(freq, sd, rd, bathm, ssp, sed, base, isPlot=isPlot)
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czdetail.descript = "{:.1f}°方向".format(azi)
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results.append(CzData(0, ranges, depths, TL, bathym, Rays, czdetail))
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return results
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''' 计算8个方向的会聚区 '''
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[bathm, ssp, sed, base] = GetEnv(database, 25, Coord(lon, lat), R=100, azi=0)
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if bathm.d[0] < 2000:
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# file_cz_data.write("各个方位都不会出现会聚区")
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return results
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else:
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descripts = ["正北方向", "东北方向", "正东方向", "东南方向", "正南方向", "西南方向", "正西方向", "西北方向"]
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theta = np.arange(0, 359, 45)
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for i in range(8):
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[bathm, ssp, sed, base] = GetEnv(database, 25, Coord(lon, lat), R=100, azi=theta[i])
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if np.mean(bathm.d) < 2000:
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# 不会出现会聚区
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continue
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ranges, depths, TL, bathym, Rays, czdetail = call_fangwei(freq, sd, rd, bathm, ssp, sed, base, isPlot=isPlot)
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czdetail.descript = descripts[i]
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results.append(CzData(theta[i], ranges, depths, TL, bathym, Rays, czdetail))
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return results |