Conditional Temperature Recording for Stable State Detection
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Solution Overview
Problem
Existing temperature measurement systems for food products lack accuracy in recording stable temperature states, leading to potential fluctuations and inaccuracies in monitoring and recording, especially in food hygiene management systems like HACCP.
Innovation Solution
A temperature measuring apparatus with a recording switch that records temperature information only when the temperature difference is within a pre-set range, using a sensor to measure and output both initial and stabilized temperatures, and includes a communication unit for wireless data transfer to a host apparatus, ensuring accurate and stable temperature monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature is recorded continuously at fixed intervals, then measurement coverage is improved, but measurement precision deteriorates due to inclusion of unstable temperature states
Solution Approach 1:
The patent applies dynamics by making the measurement recording conditional rather than fixed. The recording unit dynamically adjusts whether to record temperature based on real-time evaluation of temperature change rates. When temperature stabilizes (change rate below threshold), recording is enabled; when temperature fluctuates rapidly, recording is disabled. This dynamic approach ensures high measurement precision for stable states without sacrificing overall measurement coverage.
Solution Approach 2:
The patent changes the parameter of recording frequency based on temperature stability. Instead of using a fixed recording interval, the system varies the effective recording rate according to the temperature change rate parameter. When dT/dt < threshold, recording occurs at full rate; when dT/dt >= threshold, recording is suppressed. This parameter-based control resolves the contradiction between measurement precision and productivity.
2Reliability
If all measured temperatures are recorded, then data completeness is improved, but data reliability deteriorates due to inclusion of unstable state measurements
Solution Approach 1:
The patent applies preliminary action by evaluating temperature stability before committing to a recording decision. The judging unit continuously assesses the temperature change rate in advance of each potential recording event. By performing this preliminary judgment, the system ensures that only measurements taken during stable temperature states are recorded, thereby guaranteeing data reliability without losing critical temperature state information.
Solution Approach 2:
The system uses feedback by continuously monitoring the temperature change rate and using this information to control the recording operation. The judging unit provides real-time feedback about temperature stability to the recording unit, which then adjusts its recording behavior accordingly. This feedback mechanism ensures that reliable measurements are captured while unstable, unreliable measurements are automatically excluded.
3Measurement precision
If temperature measurement interval is reduced, then measurement detail is improved, but system complexity increases due to continuous monitoring requirements
Solution Approach 1:
The patent extracts the essential function of temperature monitoring from continuous operation to conditional operation. Instead of continuously monitoring and recording all temperature changes, the system extracts only the critical function of detecting when temperature stabilizes. By taking out the continuous monitoring requirement and replacing it with event-driven monitoring (triggered by stability detection), the system achieves high measurement precision without the burden of continuous complex monitoring.
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 apparatus provides highly accurate and reliable temperature information that reflects the steady state of the target object, reducing fluctuations and enhancing the ability to monitor and record temperatures effectively for food products, aligning with HACCP standards.
Implementation Method 1
a sensor that measures the temperature of a target object at intervals of a first period
Data Source
AI summary
An apparatus including a recording switch for recording a temperature of an object; a judging unit that measures the temperature of the object using a sensor at intervals and judges whether a difference in temperatures measured at the intervals is within a range of a pre-set value; a first acquisition unit that records and/or outputs, when a switch-on of the recording switch is detected and the difference in temperatures is within the range of the pre-set value, information including a first temperature measured using the sensor and has become valid by the switch-on of the recording switch; and a second acquisition unit that records and/or outputs, when the switch-on is detected and the difference in temperatures is outside the range information including a second temperature measured using the sensor and becomes valid when the difference in temperatures falls within the range after the switch-on is detected.