forked from zietzm/Helmholtz_Test_Bench
Martin Zietz
56 lines
1.7 KiB
Python
56 lines
1.7 KiB
Python
# import time
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from pyps2000b import PS2000B
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import globals as g
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def set_devices(xPort, yPort, zPort): # creates device objects for all PSUs
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g.xDevice = PS2000B.PS2000B(xPort)
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g.yDevice = PS2000B.PS2000B(yPort)
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g.zDevice = PS2000B.PS2000B(zPort)
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def activate_all(): # enables remote control and output on all PSUs and channels
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g.xDevice.enable_all()
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g.yDevice.enable_all()
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g.zDevice.enable_all()
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def deactivate_all(): # disables remote control and output on all PSUs and channels
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g.xDevice.disable_all()
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g.yDevice.disable_all()
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g.zDevice.disable_all()
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def set_field_simple(vector): # forms magnetic field as specified by vector, w/o cancelling ambient field
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i_vec = vector/g.Coil_const
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set_current_vec(i_vec)
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def set_field(vector): # forms magnetic field as specified by vector, corrected for ambient field
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field = vector - g.ambientField
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i_vec = field/g.Coil_const
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set_current_vec(i_vec)
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def set_current_vec(i_vec): # sets needed currents on each axis for given vector
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set_current(g.xDevice, i_vec[0])
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set_current(g.yDevice, i_vec[1])
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set_current(g.zDevice, i_vec[2])
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def set_current(device, value): # sets current with correct polarity on one axis
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# ToDo: Check behaviour with only current or only voltage set
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# ToDo: Check behaviour when trying to set too high currents
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if value > 0:
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device.current1 = value
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device.voltage2 = 0
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elif value < 0:
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device.voltage1 = 0
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device.current2 = -value
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elif value == 0:
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device.voltage1 = 0
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device.voltage2 = 0
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else:
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raise ValueError("Invalid current value. (This should be impossible.)")
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