DAQmxCreateAIBridgeChan
- Updated2023-03-16
- 2 minute(s) read
int32 DAQmxCreateAIBridgeChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, const char customScaleName[]);
Purpose
Creates channel(s) that measure voltage ratios from a Wheatstone bridge.
Use this instance with bridge-based sensors that measure phenomena other than strain, force, pressure, or torque, or that scale data to physical units NI-DAQmx does not support.
Use a custom scale or other scaling code to convert the voltage ratios to physical units.
Parameters
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| Name | Type | Description | ||||||||||||
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| taskHandle | TaskHandle | The task to which to add the channels that this function creates. | ||||||||||||
| physicalChannel | The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels. | |||||||||||||
| nameToAssignToChannel | The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels. |
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| minVal | float64 | The minimum value, in units, that you expect to measure. | ||||||||||||
| maxVal | float64 | The maximum value, in units, that you expect to measure. | ||||||||||||
| units | int32 | Specifies in which unit to return voltage ratios from the channel.
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| bridgeConfig | int32 | Specifies the Wheatstone bridge configuration connected to the channel.
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| voltageExcitSource | int32 | The source of excitation.
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| voltageExcitVal | float64 | Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values. | ||||||||||||
| nominalBridgeResistance | float64 | Specifies in ohms the resistance of the bridge while not under load. | ||||||||||||
| customScaleName | The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL. |
Return Value
| Name | Type | Description |
|---|---|---|
| status | int32 | The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error. |