test_channel_creation.py 文件源码

def test_ai_strain_gage_chan(self, x_series_device, seed):
        # Reset the pseudorandom number generator with seed.
        random.seed(seed)

        ai_phys_chan = random.choice(x_series_device.ai_physical_chans).name

        with nidaqmx.Task() as task:
            ai_channel = task.ai_channels.add_ai_strain_gage_chan(
                ai_phys_chan, name_to_assign_to_channel="StrainGageChannel",
                min_val=-0.05, max_val=0.05, units=StrainUnits.STRAIN,
                strain_config=StrainGageBridgeType.FULL_BRIDGE_I,
                voltage_excit_source=ExcitationSource.EXTERNAL,
                voltage_excit_val=1.0, gage_factor=4.0,
                initial_bridge_voltage=0.0, nominal_gage_resistance=350.0,
                poisson_ratio=0.30, lead_wire_resistance=0.1,
                custom_scale_name="")

            assert ai_channel.physical_channel.name == ai_phys_chan
            assert ai_channel.name == "StrainGageChannel"
            assert numpy.isclose(ai_channel.ai_min, -0.05)
            assert numpy.isclose(ai_channel.ai_max, 0.05)
            assert ai_channel.ai_strain_units == StrainUnits.STRAIN
            assert (ai_channel.ai_strain_gage_cfg ==
                    StrainGageBridgeType.FULL_BRIDGE_I)
            assert ai_channel.ai_excit_src == ExcitationSource.EXTERNAL
            assert ai_channel.ai_excit_val == 1.0
            assert ai_channel.ai_strain_gage_gage_factor == 4.0
            assert ai_channel.ai_bridge_initial_voltage == 0.0
            assert ai_channel.ai_strain_gage_poisson_ratio == 0.30
            assert ai_channel.ai_lead_wire_resistance == 0.1