Dual Current Source Device for Measurement Accuracy Monitoring
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Solution Overview
Problem
There is a discrepancy between the measurement current generated and the actual target value in level, pressure, or flow meters due to component failures in current-determining networks, leading to inaccuracies in measurement transmission.
Innovation Solution
A current generation device with a first current source for generating a measurement current and a second current source for generating a compensation current, which detects deviations from the target value using a detection circuit, allowing for real-time monitoring and adjustment of the measurement current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single current source is used to generate measurement current, then the device structure is simple, but the measurement precision deteriorates due to discrepancies caused by component failures in current-determining networks
Solution Approach 1:
The single current source is segmented into two independent current sources: a first current source for generating the measurement current and a second current source for generating the compensation current. This segmentation allows independent monitoring and compensation of current deviations, resolving the contradiction between structural simplicity and measurement precision.
Solution Approach 2:
A detection circuit is introduced to monitor the measurement current and generate a compensation current based on detected deviations. This feedback mechanism continuously adjusts the compensation current to counteract discrepancies, maintaining measurement precision without requiring complex external monitoring circuits.
2Measurement precision
If external monitoring circuits are used to detect current deviations, then the measurement precision is improved, but the device complexity and cost increase
Solution Approach 1:
The monitoring function is merged with the current generation function by integrating the detection circuit and compensation current source into the same device. This eliminates the need for separate external monitoring circuits while maintaining the ability to detect and compensate for current deviations accurately.
Solution Approach 2:
The device monitors and compensates for its own current deviations using internally integrated circuits. The detection circuit monitors the measurement current and the compensation current source automatically adjusts to compensate for deviations, making the system self-regulating without requiring external monitoring infrastructure.
Data Source
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AI summary
The device (100) has a current source (103) generating a measuring current (101). Another current source (104) generates a compensating current (105) in order to compensate a part of the measuring current. A detection circuit (106) detects a deviation of the measuring current from a nominal value on the basis of the compensating current, where detection of the deviation is performed using a voltage measurement process. A current-sensing resistor unit (108) is provided such that compensating current flows through the current-sensing resistor unit. Independent claims are also included for the following: (1) a method for the generation and simultaneous monitoring of a measuring current for one of a level meter, a pressure gauge and a flowmeter (2) a program element instructing a processor to perform a method for the generation and simultaneous monitoring of a measuring current (3) a computer-readable medium to perform a method for the generation and simultaneous monitoring of a measuring current.