Method for multiplexing wheatstone bridge measurements
AssigneeHalliburton Energy Services, Inc.
InventorsOleg Bondarenko, Wei Zhang, Timothy S. Glenn
Life of this patent
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Abstract
A system, method, and circuit for determining signals. A bridge output is received from a Wheatstone bridge sensing a slow signal and a fast signal. A slow output associated with the slow signal and a fast output associated with the fast signal are determined from the bridge output utilizing a microcontroller. The microcontroller generates the offset signal in response to the slow output. Other systems, methods, and circuits are disclosed.
Claims20
A method for determining signals, the method comprising:
- receiving a bridge output from a Wheatstone bridge sensing a slow signal and a fast signal;
- and
- determining a slow output associated with the slow signal and a fast output associated with the fast signal from the bridge output utilizing a microcontroller, wherein the microcontroller generates an offset signal in response to the slow output.
A circuit in a downhole tool, the circuit comprising:
- a Wheatstone bridge comprising first sensors for detecting a fast signal and second sensors for detecting a slow signal;
- an operational amplifier connected to the Wheatstone bridge configured to receive a bridge output from the Wheatstone bridge and generate an output, wherein the operational amplifier offsets the output based on an offset signal;
- an analog-to-digital converter (ADC) connected to the operational amplifier and configured to convert the output to a digital output;
- a microcontroller connected to the ADC configured to determine a fast output and a slow output from the digital output, wherein the slow output is utilized to generate the offset signal.
An application-specific integrated circuit (ASIC) comprising:
- a Wheatstone bridge sensor for detecting a fast signal and a slow signal;
- a processor in communication with the Wheatstone bridge for executing a set of instructions;
- and
- a memory in communication with the processor for storing the set of instructions for configuring logic, wherein the logic is operable to:
- receives a bridge output from the Wheatstone bridge;
- determines a slow output associated with the slow signal and a fast output associated with the fast signal from the output, wherein the offset signal is generated in response to the slow output.
Dependencies are inferred from the claim text.