Measurement Signal Calibration Control for Shorter Cycle Time
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Solution Overview
Problem
Existing measurement devices face challenges in shortening the measurement cycle due to the sequential processing of detected signals and calibration signals, which increases the measurement cycle time and requires multiple communications for control signals.
Innovation Solution
A measurement device with a first controller that outputs a control signal designating both input and calibration signals for conversion into digital signals, utilizing a second controller with a selector, converter, calculator, and manager to perform these processes in parallel, thereby reducing the measurement cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main controller sequentially performs control for converting detected signal into digital signal and control for converting calibration signal into digital signal, then the measurement device can perform internal calibration, but the measurement cycle becomes long
Solution Approach 1:
The control functions are segmented between two controllers: the first controller handles control signal output, while the second controller handles signal conversion and calculation. This segmentation allows parallel execution of different control tasks, reducing the sequential processing time and shortening the measurement cycle while maintaining calibration capability
Solution Approach 2:
The second controller performs conversion of calibration signal into digital signal in advance during the first process, so that the calibration data is ready before the third process requires it. This preliminary action eliminates waiting time and reduces the overall measurement cycle
2Measurement precision
If the measurement device performs communication with control signal twice in the measurement cycle, then both detected signal and calibration signal can be converted into digital signals, but the measurement cycle increases
Solution Approach 1:
The first controller outputs a single control signal that simultaneously designates both the input signal and calibration signal for conversion. This merging of control functions reduces the number of communication cycles from two to one, thereby shortening the measurement cycle while ensuring both signals are properly converted
Data Source
AI summary
A measurement device according to one aspect of the present invention includes a first controller configured to output a control signal and a second controller configured to perform a first control and then to perform a second control based on the control signal output from the first controller. The control signal designates both an input signal and a calibration signal to be converted into a digital input signal and a digital calibration signal, respectively. The input signal is input from an outside of the measurement device. The calibration signal is previously prepared. The first control is for selecting the input signal and converting the selected input signal into the digital input signal. The second control is for selecting the calibration signal and converting the selected calibration signal into the digital calibration signal and for calculating a measured value using the digital input signal converted by the first control and another digital calibration signal converted by a control performed before the first control.