Predictive Thermometer Circuit With Temperature Compensation
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Solution Overview
Problem
Existing electronic thermometers have long measurement times and inaccuracies due to the trade-off between shortened measurement times and increased measurement errors, and they lack effective temperature compensation mechanisms.
Innovation Solution
A predictive electronic thermometer circuit structure with a compensation module, including a temperature compensation fractional frequency divider, counter, and lookup table ROM, which allows for parallel operation with a real measurement module to provide accurate and fast temperature readings by calculating and compensating for measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the preset time period is shortened to reduce measurement time, then measurement speed is improved, but measurement precision deteriorates
Solution Approach 1:
The patent pre-calculates and stores temperature compensation values in a lookup table (ROM) before actual measurement. The compensation values are computed based on the relationship between oscillation cycle numbers and temperature errors, allowing the system to quickly retrieve and apply corrections without extending measurement time.
Solution Approach 2:
The system measures the actual oscillation cycle number, compares it with the standard value from the lookup table, and applies feedback compensation to correct the temperature reading. This closed-loop approach ensures accurate measurements even with shortened measurement periods.
2Measurement precision
If the measurement time is extended to improve measurement accuracy, then measurement precision is improved, but measurement speed deteriorates
Solution Approach 1:
Temperature compensation data is pre-calculated and stored in the lookup table during manufacturing or initialization. This eliminates the need for time-consuming real-time calculations during actual measurement, allowing fast retrieval and application of compensation values.
Solution Approach 2:
The patent creates a copy of the temperature-compensation relationship in the form of a lookup table with pre-stored oscillation cycle numbers and corresponding compensation values. This copy allows rapid access without performing the full measurement and calculation process again.
3Measurement precision
If temperature compensation is implemented to improve measurement accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The temperature compensation function is segmented into distinct modular components: oscillation circuit, counter, lookup table (ROM), and compensation calculation unit. This modular architecture allows each component to perform a specific function independently, simplifying design and maintenance while achieving accurate compensation.
Solution Approach 2:
The lookup table acts as an intermediary between the oscillation circuit and the temperature display. It stores pre-calculated compensation data and translates oscillation cycle numbers into corrected temperature values, simplifying the overall system architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables simple implementation, fast temperature measurement, and accurate compensation for measurement errors, allowing for quick and precise temperature measurement with the option to select between real and predictive measurement modes for calibration.
Implementation Method 1
a temperature measurement oscillation circuit and a real measurement module; where the compensation module and the real measurement module are connected in parallel between the temperature measurement oscillation circuit and the LCD drive module
Data Source
AI summary
A predictive electronic thermometer circuit structure capable of temperature compensation is provided, including: a compensation module, a thermometer circuit, and a liquid crystal display (LCD) drive module. The thermometer circuit includes a temperature measurement oscillation circuit and a real measurement module. The compensation module and the real measurement module are connected in parallel between the temperature measurement oscillation circuit and the LCD drive module. The predictive electronic thermometer circuit structure controls the on and off of the compensation module and the real measurement module through a combination logic control switch respectively. When the compensation module is off and the real measurement module is on, an actual measured data is output. When the real measurement module is off and the compensation module is on, a temperature value is output after predictive compensation. The electronic thermometer has a temperature compensation function, and measures the temperature quickly and accurately.