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Look for actual isobaric counter diffusion

Browse source 
Identify segements that fullfill the folllowing criteria for
the leading compartment:

He is off-gasing while N2 is on-gasing
Overall there is on-gasing

Add a line to the info box for those segments

Signed-off-by: Robert C. Helling <helling@atdotde.de>
This commit is contained in:
Robert C. Helling 2018-04-10 21:20:38 +02:00
parent 71d1e78db2
commit ece714556f
5 changed files with 14 additions and 2 deletions
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1
CHANGELOG.md
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@ -1,3 +1,4 @@
- Profile: Add information about actual isobaric counter diffusion happening
- Suunto DM import: improved temperature parsing in special cases
# Always add new entries at the very top of this file above other
# existing entries.

8
core/deco.c
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@ -482,7 +482,7 @@ void add_segment(struct deco_state *ds, double pressure, const struct gasmix *ga
(void) sac;
int ci;
struct gas_pressures pressures;
bool icd = false;
fill_pressures(&pressures, pressure - ((in_planner() && (decoMode() == VPMB)) ? WV_PRESSURE_SCHREINER : WV_PRESSURE),
gasmix, (double) ccpo2 / 1000.0, dive->dc.divemode);
@ -494,6 +494,11 @@ void add_segment(struct deco_state *ds, double pressure, const struct gasmix *ga
double n2_satmult = pn2_oversat > 0 ? buehlmann_config.satmult : buehlmann_config.desatmult;
double he_satmult = phe_oversat > 0 ? buehlmann_config.satmult : buehlmann_config.desatmult;
// Report ICD if N2 is more on-gasing than He off-gasing in leading tissue
if (ci == ds->ci_pointing_to_guiding_tissue && pn2_oversat > 0.0 && phe_oversat < 0.0 &&
pn2_oversat * n2_satmult * n2_f + phe_oversat * he_satmult * he_f > 0)
icd = true;
ds->tissue_n2_sat[ci] += n2_satmult * pn2_oversat * n2_f;
ds->tissue_he_sat[ci] += he_satmult * phe_oversat * he_f;
ds->tissue_inertgas_saturation[ci] = ds->tissue_n2_sat[ci] + ds->tissue_he_sat[ci];
@ -501,6 +506,7 @@ void add_segment(struct deco_state *ds, double pressure, const struct gasmix *ga
}
if (decoMode() == VPMB)
calc_crushing_pressure(ds, pressure);
ds->icd_warning = icd;
return;
}

1
core/dive.h
View file

@ -896,6 +896,7 @@ struct deco_state {
int ci_pointing_to_guiding_tissue;
double gf_low_pressure_this_dive;
int deco_time;
bool icd_warning;
};
extern void add_segment(struct deco_state *ds, double pressure, const struct gasmix *gasmix, int period_in_seconds, int setpoint, const struct dive *dive, int sac);

5
core/profile.c
View file

@ -1036,7 +1036,8 @@ void calculate_deco_information(struct deco_state *ds, struct deco_state *planne
for (j = t0 + time_stepsize; j <= t1; j += time_stepsize) {
int depth = interpolate(entry[-1].depth, entry[0].depth, j - t0, t1 - t0);
add_segment(ds, depth_to_bar(depth, dive),
gasmix, time_stepsize, entry->o2pressure.mbar, dive, entry->sac);
gasmix, time_stepsize, entry->o2pressure.mbar, dive, entry->sac);
entry->icd_warning = ds->icd_warning;
if ((t1 - j < time_stepsize) && (j < t1))
time_stepsize = t1 - j;
}
@ -1498,6 +1499,8 @@ static void plot_string(struct plot_info *pi, struct plot_data *entry, struct me
}
}
}
if (entry->icd_warning)
put_format(b, "%s", translate("gettextFromC", "ICD in leading tissue\n"));
if (entry->heartbeat && prefs.hrgraph)
put_format_loc(b, translate("gettextFromC", "heart rate: %d\n"), entry->heartbeat);
if (entry->bearing >= 0)

1
core/profile.h
View file

@ -63,6 +63,7 @@ struct plot_data {
double ambpressure;
double gfline;
double density;
bool icd_warning;
};
struct ev_select {