Schichtenverbund Auswertung hinzugefügt

pytestpavement/__init__.py

@@ -0,0 +1,17 @@
+# main __init__.py
+
+from .analysis import *
+from .io import *
+from .versuche import *
+
+__all__ = [
+    # IO
+    "read_geosys",
+    # Versuche
+    "TestSchichtenverbundV2GeoSys",
+    "TestSchichtenverbundV2GeoSysExtractedEMPA",
+    # Analyse
+    "fit_cos_eval",
+    "fit_cos_simple",
+    "fit_cos",
+]

pytestpavement/analysis/__init__.py

@@ -0,0 +1,9 @@
+from .regression import *
+
+__all__ = [
+    # regession models
+    "fit_cos_simple",
+    "fit_cos",
+    #helper functions
+    "fit_cos_eval",
+]

pytestpavement/analysis/regression.py

@@ -0,0 +1,161 @@
+import lmfit as lm
+import numpy as np
+import scipy.special as sf
+from scipy.optimize import curve_fit
+
+
+def cosfunc(t, A, w, p, c, e):
+    """
+    definition of the sin function
+    """
+
+    return A * np.cos(2 * np.pi * w * t + p) + e * t + c
+
+
+def fit_cos_eval(x, par):
+    """
+    
+    par: dict
+        fitting results
+    
+    """
+
+    ys = cosfunc(x, par['amp'], par['freq'], par['phase'], par['offset'],
+                 par['slope'])
+
+    return ys
+
+
+def regression_sine_fft():
+    """
+    fast fourier transformation for sine data
+    """
+
+    return []
+
+
+def fit_cos_simple(x, y, freq=10.0):
+    """
+    simple sine regression
+    
+    x: vector or list
+    y: vector or list
+    
+    freq: float
+        initial frequency of regression analysis
+        
+    
+    
+    """
+
+    tt = np.array(x)
+    yy = np.array(y)
+
+    guess_offset = np.mean(yy)
+    offset_b = 0.4 * abs(guess_offset)
+
+    guess_amp = abs(np.max(yy) - np.min(yy)) / 2.0
+
+    param_bounds = ([
+        0.3 * guess_amp, 0.99 * freq, -np.inf, guess_offset - offset_b, -np.inf
+    ], [1.3 * guess_amp, 1.01 * freq, np.inf, guess_offset + offset_b, np.inf])
+
+    popt, pcov = curve_fit(cosfunc, tt, yy, bounds=param_bounds)
+
+    A, w, p, c, e = popt
+
+    return {
+        "amp": A,
+        "freq": w,
+        "phase": p,
+        "offset": c,
+        "slope": e,
+    }
+
+
+def fit_cos(x, y, freq=10.0):
+    """
+    sine regression
+    
+    x: vector or list
+    y: vector or list
+    
+    freq: float
+        initial frequency of regression analysis
+        
+    
+    
+    """
+
+    # step 1
+
+    res_step1 = fit_cos_simple(x, y, freq=freq)
+
+    # step 2: lmfit
+    res = {}
+
+    mod = lm.models.Model(cosfunc)
+
+    mod.set_param_hint(
+        'A',
+        value=res_step1['amp'],
+        #min=res_step1['amp'] - 0.5 * abs(res_step1['amp']),
+        #max=res_step1['amp'] + 0.5 * abs(res_step1['amp'])
+    )
+
+    mod.set_param_hint(
+        'w',
+        value=freq,
+        vary=True,
+        #min=res_step1['freq'] - 0.3 * abs(res_step1['freq']),
+        #max=res_step1['freq'] + 0.3 * abs(res_step1['freq'])
+    )
+
+    mod.set_param_hint('p', value=res_step1['phase'], vary=True)
+
+    mod.set_param_hint('c', value=res_step1['offset'],
+                       vary=True)  #, min = -0.5, max = 0.5)
+
+    mod.set_param_hint('e', value=res_step1['slope'], vary=True)
+
+    parms_fit = [
+        mod.param_hints['A']['value'], mod.param_hints['w']['value'],
+        mod.param_hints['p']['value'], mod.param_hints['c']['value'],
+        mod.param_hints['e']['value']
+    ]
+
+    abweichung = []
+    chis = []
+    chis_red = []
+    results = []
+    r2 = []
+
+    methods = ['leastsq', 'powell']
+    dof = len(y) - len(parms_fit)
+
+    for method in methods:
+        result = mod.fit(y, t=x, method=method, verbose=False)
+        r2temp = 1 - result.residual.var() / np.var(y)
+        #    r2temp = result.redchi / np.var(yfit, ddof=2)
+        if r2temp < 0.:
+            r2temp = 0
+        r2.append(r2temp)
+
+        chi = result.chisqr
+        chis_red.append(result.redchi)
+        abweichung.append(sf.gammaincc(dof / 2., chi / 2))
+        chis.append(chi)
+        results.append(result)
+
+    ret = {}
+    best = np.nanargmax(r2)
+
+    res[f'amp'] = results[best].best_values['A']
+    res[f'freq'] = results[best].best_values['w']
+    res[f'phase'] = results[best].best_values['p']
+    res[f'offset'] = results[best].best_values['c']
+    res[f'slope'] = results[best].best_values['e']
+
+    res[f'r2'] = r2[best]
+
+    return res

pytestpavement/io/__init__.py

@@ -1 +1,3 @@
-from .io import read_data
+from .geosys import read_geosys
+
+__all__ = ["read_geosys"]

pytestpavement/io/geosys.py

@@ -1,8 +1,9 @@
-from numpy import array
-from pandas import to_datetime, DataFrame
 import csv
 import os
 from sys import getsizeof
+
+from numpy import array
+from pandas import DataFrame, to_datetime
 from versuche.helper import normalice_header
 
 
@@ -28,7 +29,6 @@ def detect_tabnum(filename, tabstr,encoding='utf-8'):
                 return False
 
 
-
 def str2float(str):
     try:
         str = str.replace(',', '.')
@@ -37,7 +37,7 @@ def str2float(str):
         return None
 
 
-def read_data(filename,
+def read_geosys(filename,
                 table,
                 pkdata='001',
                 encoding='utf-8',
@@ -66,7 +66,6 @@ def read_data(filename,
         #Daten einlesen und umwandeln
         #---------------------------------------------------------------------
 
-
         data = []
         zuordnung = []
 
@@ -82,7 +81,6 @@ def read_data(filename,
         #aufräumen
         ##Datenstruktur anlegen
 
-
         data_clean = {}
         data_clean['head'] = []
         data_clean['data'] = []
@@ -112,7 +110,10 @@ def read_data(filename,
                 id_name = None
 
                 for idx_name, name in enumerate(row):
-                    if name in [r'Probekörberdurchmesser',r'Diameter of specimen', 'PK-Durchmesser', 'Probekörper-Durchmesser']:
+                    if name in [
+                            r'Probekörberdurchmesser', r'Diameter of specimen',
+                            'PK-Durchmesser', 'Probekörper-Durchmesser'
+                    ]:
                         id_durchmesser = idx_name
                     elif name in [r'Probekörperbezeichnung']:
                         id_name = idx_name
@@ -143,11 +144,13 @@ def read_data(filename,
                 except:
                     pass
 
-        header = {'d': durchmesser,
+        header = {
+            'd': durchmesser,
             'h': hoehe,
             'name': name,
             'unit_h': unit_hoehe,
-                  'unit_d': unit_durch}
+            'unit_d': unit_durch
+        }
 
         if debug:
             print('header\n', header)
@@ -209,7 +212,6 @@ def read_data(filename,
 
         return header, data
 
-
     except:
         print('Fehler beim lesen')
         raise

pytestpavement/versuche/__init__.py

@@ -0,0 +1,9 @@
+# versuche
+
+from .schichtenverbund import *
+
+__all__ = [
+    "fit_single_data",
+    "TestSchichtenverbundV2GeoSys",
+    "TestSchichtenverbundV2GeoSysExtractedEMPA",
+]

pytestpavement/versuche/schichtenverbund.py

@@ -0,0 +1,335 @@
+import os
+import sys
+from multiprocessing import Pool, cpu_count
+
+import matplotlib.pyplot as plt
+import numpy as np
+import pandas as pd
+from aenum import enum
+from fsutil import exists
+from pytestpavement.analysis import fit_cos, fit_cos_eval
+
+
+def fit_single_data(g):
+    """
+        iterate over data and fit
+        
+        """
+
+    try:
+
+        i, d = g
+
+        d = d.loc[i]
+
+        #d = d.reset_index()
+
+        Ns = d['N'].unique()
+
+        e = d[(d['N'] > Ns[-7]) & (d['N'] <= Ns[-2])].copy()
+
+        if e.empty:
+            return
+
+        e.index = e.index - e.index[0]
+
+        e = e.reset_index()
+
+        res_par = {}
+
+        res_par['T_set'] = i[0]
+        res_par['sigma_set'] = i[1]
+        res_par['f_set'] = float(i[2])
+        res_par['ext_set'] = i[3]
+
+        r2 = []
+        for col in ['F', 's1', 's2']:
+
+            x = e['time'].values
+            y = e[col].values
+
+            res_step = fit_cos(x, y, freq=res_par['f_set'])
+
+            r2.append(res_step['r2'])
+
+            for key in res_step.keys():
+                res_par[key + f'_{col}'] = res_step[key]
+
+    except:
+        return
+
+    return res_par
+
+
+class TestSchichtenverbundV2GeoSys():
+    """ 
+    read and process test of type Schichtenverbund
+    
+    Configuration created for TU Dresden
+    
+    ...
+    
+    Attributes
+    ----------------
+    filename : str
+        filename to read
+    tablenum : str
+        table number of geosys file
+    
+    Methodes
+    -------------
+    
+    
+    Returns
+    -------------
+    
+    """
+
+    def __init__(self,
+                 filename: str,
+                 diameter: float,
+                 spalt: float = 1.0,
+                 tablenum: str = '038',
+                 debug: bool = False,
+                 plot_fit: bool = False,
+                 plot_fit_error: bool = True):
+
+        self.file = filename
+
+        self.diameter = diameter
+        self.spalt = spalt
+
+        self._tablenum = tablenum
+
+        self._plot = plot_fit
+        self._plot_on_error = plot_fit_error
+
+        self._debug = debug
+
+        self.data = None
+
+        self._check_file_exists()
+        self._run()
+
+    def _run(self):
+
+        if self._debug:
+            print('debug mode')
+
+        self._read()
+        self._normalize_data()
+        self._set_units()
+
+        self._check_data()
+        self._transform_data()
+
+        self._fit_data()
+
+        self._calc_Es()
+
+    def __str__(self):
+        return f"filename: {self.file}, table number: {self._tablenum}"
+
+    def _check_file_exists(self):
+
+        assert os.path.exists(self.file)
+
+    def _read(self):
+
+        self.data = []
+
+    def _normalize_data(self):
+
+        return
+
+    def _set_units(self):
+
+        return
+
+    def _check_data(self):
+
+        must_have_values = [
+            'T_set',
+            'sigma_set',
+            'f_set',
+            'ext_set',
+            'time',
+            'F',
+            's1',
+            's2',
+            'N',
+        ]
+
+        check = [item in self.data.columns for item in must_have_values]
+
+        assert all(check)
+
+        pass
+
+    #
+
+    def _transform_data(self):
+
+        self.data = self.data.set_index(
+            ['T_set', 'sigma_set', 'f_set', 'ext_set', 'time']).sort_index()
+
+    def _fit_data(self):
+
+        if not self._debug:
+
+            with Pool(cpu_count()) as pool:
+                ret_list = pool.map(
+                    fit_single_data,
+                    [(i, d) for i, d in self.data.groupby(level=[0, 1, 2, 3])])
+
+        else:
+
+            ret_list = []
+
+            for i, d in self.data.groupby(level=[0, 1, 2, 3]):
+
+                ret_list.append(fit_single_data((i, d)))
+
+        self.res = pd.DataFrame.from_dict(
+            [r for r in ret_list if isinstance(r, dict)])
+
+        self.res = self.res.set_index(
+            ['T_set', 'sigma_set', 'f_set', 'ext_set']).sort_index()
+
+        #self.res.sort_index(axis=0, inplace=True)
+        #self.res.sort_index(axis=1, inplace=True)
+
+    def _plot_single_data(self, i):
+
+        ylabels = {
+            'F': 'Force in N',
+            's1': 'Displacement $s_1$ in $\mu m$',
+            's2': 'Displacement $s_2$ in $\mu m$'
+        }
+
+        par = self.res.loc[i].to_dict()
+
+        df = self.data.loc[i]
+        Ns = df['N'].unique()
+
+        e = df[(df['N'] > Ns[-7]) & (df['N'] <= Ns[-2])].copy()
+
+        e.index = e.index - e.index[0]
+
+        if e.empty:
+            return
+
+        fig, axs = plt.subplots(3, 1, sharex=True)
+        fig.set_figheight(1.5 * fig.get_figheight())
+
+        for i, col in enumerate(['F', 's1', 's2']):
+
+            ax = axs[i]
+            x, y = e.index, e[col]
+
+            ax.plot(x, y, c='k', label='data')
+
+            par_sel = [key for key in par.keys() if col in key]
+
+            par_sel = dict((k.split('_')[0], par[k]) for k in par_sel)
+
+            ys = fit_cos_eval(x, par_sel)
+
+            r2_sel = np.round(par_sel['r2'], 3)
+            ax.plot(x, ys, c='C1', label=f'fit (R² = {r2_sel}')
+
+            ax.legend(loc=0)
+
+            ax.set_ylabel(ylabels[col])
+
+        ax.set_xlabel('Time in s')
+        plt.tight_layout()
+        plt.show()
+
+    def plot_fitted_data(self, num: int = 7):
+        """
+        plot fit
+        """
+
+        counter = 0
+
+        for i, r in self.res.groupby(level=[0, 1, 2, 3]):
+
+            self._plot_single_data(i)
+
+            counter += 1
+
+            if (num != None) & (counter >= num):
+                break
+
+    def plot_fitted_data_error(self, rmin: float = 0.9):
+        """
+        plot fit
+        """
+
+        sel_res = self.res[(self.res['r2_F'] <= rmin)]
+
+        if sel_res.empty:
+            print('no errors')
+            return
+
+        for i, r in sel_res.groupby(level=[0, 1, 2, 3]):
+
+            self._plot_single_data(i)
+
+    def _calc_Es(self):
+
+        area = np.pi * self.diameter**2 / 4
+
+        ampF = self.res['amp_F']
+        ampS = self.res[['amp_s1', 'amp_s2']].mean(axis=1)
+
+        tau = ampF.div(area)
+        gamma = ampS.div(1000.0).div(self.spalt)
+
+        self.res['Es'] = tau / gamma
+
+
+class TestSchichtenverbundV2GeoSysExtractedEMPA(TestSchichtenverbundV2GeoSys):
+
+    def _read(self):
+        if self._debug:
+            nrows = 15000
+        else:
+            nrows = None
+
+        self.data = pd.read_csv(self.file, sep='\t', decimal='.', nrows=nrows)
+
+        self.data.drop(index=[0], inplace=True)
+        self.data.dropna(axis=0, inplace=True)
+
+        for col in self.data.columns:
+            self.data[col] = pd.to_numeric(self.data[col])
+
+    def _normalize_data(self):
+
+        col = list(self.data.columns)
+
+        for i, d in enumerate(col):
+
+            if 'soll temperature' in d:
+                col[i] = 'T_set'
+            elif 'soll sigma' in d:
+                col[i] = 'sigma_set'
+            elif 'soll frequency' in d:
+                col[i] = 'f_set'
+            elif 'soll extension' in d:
+                col[i] = 'ext_set'
+
+            elif 'vertical load from hydraulic pressure' in d:
+                col[i] = 'F'
+
+            elif 'Vertical position from LVDT 1' in d:
+                col[i] = 's1'
+            elif 'Vertical position from LVDT 2' in d:
+                col[i] = 's2'
+
+            elif 'Zyklenzähler' in d:
+                col[i] = 'N'
+
+        self.data.columns = col

setup.py

@@ -5,11 +5,13 @@ setup(
     version='0.1.0',
     author='Markus Clauß',
     author_email='markus.clauss@tu-dresden.de',
-   packages=['pytestpavement',],
+    packages=[
+        'pytestpavement',
+    ],
     #scripts=['bin/script1','bin/script2'],
     #url='http://pypi.python.org/pypi/PackageName/',
     #license='LICENSE.txt',
     description='',
     #long_description=open('README.txt').read(),
-   install_requires=['lmfit', 'pandas', 'numpy'],
+    install_requires=['lmfit', 'pandas', 'numpy', 'scipy'],
 )