def calculateCurrentVolume(self):
values = []
for count in range(1, 10):
uSeconds = hc.readvalue(self.trigger_gpio_pin, self.echo_gpio_pin)
values.append(uSeconds)
uSeconds = median(values)
distance = uSeconds * (
343.59 / 1000000.0000
) # time in us * ( speed of sound m/s / 10e6 ) -> m/us -> m
distance = distance * 100 # m -> cm
distance = distance / 2 # signal from sensor is traveling to surface and back thus dividing by two
log.debug("Distance: " + str(distance))
liquidHeight = self.sensor_distance - distance
volume = self.calculateVolume(self.reservoir_length,
self.reservoir_width, liquidHeight)
litres = self.cubicCentiMetersToLitres(
volume
) * self.reservoir_multiplier # litres multiplied by multiplier, in my setup I have two plastic boxes connected to each other, water will level between boxes by physics
log.debug("Litres: " + str(litres))
return round(litres)
def calculateCurrentVolume(self):
values = []
for count in range(1,10):
uSeconds = hc.readvalue(self.trigger_gpio_pin, self.echo_gpio_pin)
values.append(uSeconds)
uSeconds = median(values)
distance = uSeconds * ( 343.59 / 1000000.0000 ) # time in us * ( speed of sound m/s / 10e6 ) -> m/us -> m
distance = distance * 100 # m -> cm
distance = distance / 2 # signal from sensor is traveling to surface and back thus dividing by two
log.debug("Distance: " + str(distance))
liquidHeight = self.sensor_distance - distance
volume = self.calculateVolume(self.reservoir_length, self.reservoir_width, liquidHeight)
litres = self.cubicCentiMetersToLitres(volume) * self.reservoir_multiplier # litres multiplied by multiplier, in my setup I have two plastic boxes connected to each other, water will level between boxes by physics
log.debug("Litres: " + str(litres))
return round(litres)
'''
Created on Jul 1, 2015
@author: markos
'''
import HCSR04 as hc
if __name__ == '__main__':
''' trigger, echo '''
val = hc.readvalue(23,24)
val = val / 1000000.00
distance = val * 343.59 * 100
distance = distance / 2
distance = distance / 1000000.00
distance = round(distance, 2)
print "Distance : %.1f" % distance
'''
Created on Jul 1, 2015
@author: markos
'''
import HCSR04 as hc
if __name__ == '__main__':
''' trigger, echo '''
val = hc.readvalue(23, 24)
val = val / 1000000.00
distance = val * 343.59 * 100
distance = distance / 2
distance = distance / 1000000.00
distance = round(distance, 2)
print "Distance : %.1f" % distance
