Temperature-Sensing Data Processing Module for Asynchronous Signal Counting
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Solution Overview
Problem
Existing temperature-sensing technologies face significant errors due to the asynchronous nature of the signal to be measured and the reference clock signal, leading to inaccuracies in temperature estimation.
Innovation Solution
A temperature-sensing data processing module that includes two counting units to count rising and falling edges of a frequency conversion signal, generating a doubled-frequency counting value and using a temperature-frequency fitting function to calculate the temperature value, effectively doubling the frequency of the counting-clock signal and reducing sampling errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reference clock signal with a known frequency is used for counting against an asynchronous temperature signal, then the counting process can be performed, but significant errors occur in temperature estimation due to the asynchronous nature of the signals
Solution Approach 1:
The patent introduces a frequency conversion module as an intermediary that converts the temperature signal into a frequency conversion signal. This intermediary component enables synchronous counting by transforming the originally asynchronous temperature signal into a form that can be reliably counted against the reference clock signal, thereby eliminating the counting errors caused by signal asynchrony
Solution Approach 2:
The patent changes the frequency parameter of the temperature signal through the frequency conversion module. By converting the temperature signal into a frequency conversion signal with a known frequency relationship to the reference clock, the system achieves synchronous counting and improves temperature estimation accuracy while reducing counting errors
Data Source
AI summary
Disclosure regards a temperature sensor and a temperature-sensing data processing module, including two counting units, each configured to set a reference clock signal and a frequency conversion signal to be a counting-clock signal and a counting-sample signal according to a control signal, wherein during a sampling period consisting of at least one signal cycle of the counting-sample signal, the two counting units count the numbers of rising edges and falling edges of the counting-clock signal; and a count-control unit configured to generate a doubled-frequency counting value based on a sum of the number of rising edges and the number of falling edges to generate a temperature value based on the doubled-frequency counting value and a temperature-frequency fitting function. Therefore, problems regarding temperature estimation errors in the prior art are effectively solved.