def runTest(self):
self.assertAlmostEqual(altitude_or_depth_to_absolute_pressure(-160),
17.18013, 5,
'Wrong pressure at -160m : %s'
% altitude_or_depth_to_absolute_pressure(-160))
def runTest(self):
self.assertAlmostEqual(altitude_or_depth_to_absolute_pressure(-30),
4.04454, 5, 'Wrong pressure at -30m : %s'
% altitude_or_depth_to_absolute_pressure(-30))
def runTest(self):
self.assertAlmostEqual(altitude_or_depth_to_absolute_pressure(-100),
11.11755, 5,
'Wrong pressure at -100m : %s'
% altitude_or_depth_to_absolute_pressure(-100))
def runTest(self):
self.assertAlmostEqual(altitude_or_depth_to_absolute_pressure(3000),
0.701085204119, 5,
'Wrong pressure at 3000m : %s'
% altitude_or_depth_to_absolute_pressure(3000))
def runTest(self):
self.assertAlmostEqual(altitude_or_depth_to_absolute_pressure(7000),
0.4106070795, 5,
'Wrong pressure at 7000m : %s'
% altitude_or_depth_to_absolute_pressure(7000))
def runTest(self):
self.assertAlmostEqual(altitude_or_depth_to_absolute_pressure(0),
1.01325, 5, 'Wrong pressure at 0m : %s'
% altitude_or_depth_to_absolute_pressure(0))
def runTest(self):
self.assertAlmostEqual(altitude_or_depth_to_absolute_pressure(1000),
0.898745604274, 5,
'Wrong pressure at 1000m : %s'
% altitude_or_depth_to_absolute_pressure(1000))
def runTest(self):
self.assertAlmostEqual(
altitude_or_depth_to_absolute_pressure(-160), 17.18013, 5,
'Wrong pressure at -160m : %s' %
altitude_or_depth_to_absolute_pressure(-160))
def no_flight_time(self, altitude=settings.FLIGHT_ALTITUDE, tank=None):
"""Evaluate the no flight time.
by 'ascending' to the choosen flight altitude.
Ascending will generate the necessary 'stop' at the current depth
(which is 0m) .
The stop time represents the no flight time
:param int altitude: in meter : altitude used for the calculation
:param float flight_ascent_rate: in m/ms
:param tank: (optionnal)
it is possible to provide a tank while calling
no_flight_time to force "no flight deco" with
another mix than air.
In this case, we will 'consume' the tank
When the tank is empty, it automatically switch to air
:type tank: :class:`dipplanner.tank.Tank`
:returns: no fight time in seconds
:rtype: int
:raises InfiniteDeco: if the no flight time can not achieve enough
decompression to be able to go to give altitude
"""
no_flight_time = 0
deco_uses_tank = False # set to true when deco is using a tank
# need to change gaz to air:
# create a 'dummy' air tank
no_flight_air_tank = Tank(
tank_vol=settings.ABSOLUTE_MAX_TANK_SIZE,
tank_pressure=settings.ABSOLUTE_MAX_TANK_PRESSURE,
tank_rule="30b")
if tank is not None:
no_flight_tank = tank
deco_uses_tank = True
self.logger.info("Accelerating no flight"
"time using a tank:%s", tank)
else:
no_flight_tank = no_flight_air_tank
next_stop_pressure = altitude_or_depth_to_absolute_pressure(altitude)
# bigger stop time to speed up calculation
# (precision is not necesary here)
stop_time = 60 # in second -
model_copy = copy.deepcopy(self.model)
model_ceiling = model_copy.ceiling_in_pabs()
while model_ceiling > next_stop_pressure:
# loop for "deco" calculation based on the new ceiling
model_copy.const_depth(0.0,
stop_time,
no_flight_tank.f_he, # f_he
no_flight_tank.f_n2, # f_n2
0.0) # ppo2 (for cc)
no_flight_time += stop_time
model_ceiling = model_copy.ceiling_in_pabs()
if deco_uses_tank:
if no_flight_tank.remaining_gas <= 0:
no_flight_tank = no_flight_air_tank
deco_uses_tank = False
self.logger.info("Tank used for accelerating "
"no flight time is empty, "
"swithing to air at %s s",
no_flight_time)
else:
no_flight_tank.consume_gas(
settings.DECO_CONSUMPTION_RATE * stop_time)
if no_flight_time > 300000:
raise InfiniteDeco("Infinite deco error")
self.no_flight_time_value = no_flight_time
return no_flight_time
def runTest(self):
self.assertAlmostEqual(
altitude_or_depth_to_absolute_pressure(-30), 4.04454, 5,
'Wrong pressure at -30m : %s' %
altitude_or_depth_to_absolute_pressure(-30))
def runTest(self):
self.assertAlmostEqual(
altitude_or_depth_to_absolute_pressure(-100), 11.11755, 5,
'Wrong pressure at -100m : %s' %
altitude_or_depth_to_absolute_pressure(-100))
def runTest(self):
self.assertAlmostEqual(
altitude_or_depth_to_absolute_pressure(7000), 0.4106070795, 5,
'Wrong pressure at 7000m : %s' %
altitude_or_depth_to_absolute_pressure(7000))
def runTest(self):
self.assertAlmostEqual(
altitude_or_depth_to_absolute_pressure(3000), 0.701085204119, 5,
'Wrong pressure at 3000m : %s' %
altitude_or_depth_to_absolute_pressure(3000))
def runTest(self):
self.assertAlmostEqual(
altitude_or_depth_to_absolute_pressure(1000), 0.898745604274, 5,
'Wrong pressure at 1000m : %s' %
altitude_or_depth_to_absolute_pressure(1000))
def runTest(self):
self.assertAlmostEqual(
altitude_or_depth_to_absolute_pressure(0), 1.01325, 5,
'Wrong pressure at 0m : %s' %
altitude_or_depth_to_absolute_pressure(0))
def no_flight_time(self, altitude=settings.FLIGHT_ALTITUDE, tank=None):
"""Evaluate the no flight time.
by 'ascending' to the choosen flight altitude.
Ascending will generate the necessary 'stop' at the current depth
(which is 0m) .
The stop time represents the no flight time
:param int altitude: in meter : altitude used for the calculation
:param float flight_ascent_rate: in m/ms
:param tank: (optionnal)
it is possible to provide a tank while calling
no_flight_time to force "no flight deco" with
another mix than air.
In this case, we will 'consume' the tank
When the tank is empty, it automatically switch to air
:type tank: :class:`dipplanner.tank.Tank`
:returns: no fight time in seconds
:rtype: int
:raises InfiniteDeco: if the no flight time can not achieve enough
decompression to be able to go to give altitude
"""
no_flight_time = 0
deco_uses_tank = False # set to true when deco is using a tank
# need to change gaz to air:
# create a 'dummy' air tank
no_flight_air_tank = Tank(
tank_vol=settings.ABSOLUTE_MAX_TANK_SIZE,
tank_pressure=settings.ABSOLUTE_MAX_TANK_PRESSURE,
tank_rule="30b")
if tank is not None:
no_flight_tank = tank
deco_uses_tank = True
self.logger.info("Accelerating no flight"
"time using a tank:%s", tank)
else:
no_flight_tank = no_flight_air_tank
next_stop_pressure = altitude_or_depth_to_absolute_pressure(altitude)
# bigger stop time to speed up calculation
# (precision is not necesary here)
stop_time = 60 # in second -
model_copy = copy.deepcopy(self.model)
model_ceiling = model_copy.ceiling_in_pabs()
while model_ceiling > next_stop_pressure:
# loop for "deco" calculation based on the new ceiling
model_copy.const_depth(
0.0,
stop_time,
no_flight_tank.f_he, # f_he
no_flight_tank.f_n2, # f_n2
0.0) # ppo2 (for cc)
no_flight_time += stop_time
model_ceiling = model_copy.ceiling_in_pabs()
if deco_uses_tank:
if no_flight_tank.remaining_gas <= 0:
no_flight_tank = no_flight_air_tank
deco_uses_tank = False
self.logger.info(
"Tank used for accelerating "
"no flight time is empty, "
"swithing to air at %s s", no_flight_time)
else:
no_flight_tank.consume_gas(settings.DECO_CONSUMPTION_RATE *
stop_time)
if no_flight_time > 300000:
raise InfiniteDeco("Infinite deco error")
self.no_flight_time_value = no_flight_time
return no_flight_time
