Communication System Time Differential Calculation
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Solution Overview
Problem
In conventional communication systems, cycle shifts between the transmission cycle of a sensor and the calculation cycle of a microcomputer, or transmission delays of synchronization trigger signals, can lead to incorrect calculation of time differential values.
Innovation Solution
A communication system where the microcomputer calculates time differential values using separate time information, allowing it to correctly determine and correct for cycle shifts and delays, ensuring accurate calculations even when the sensor and microcomputer operate with different timers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the sensor and microcomputer operate based on different timers to maintain independent operation, then operational independence is improved, but cycle shift occurs between transmission cycle and calculation cycle
Solution Approach 1:
The patent introduces a trigger signal as an intermediary mechanism between the sensor and microcomputer. The microcomputer sends a trigger signal to the sensor, and the sensor responds by transmitting the sensor signal. This intermediary trigger mechanism allows the system to maintain independent timers while establishing a synchronized reference point for accurate time differential calculation.
Solution Approach 2:
The system implements feedback by having the sensor transmit a response signal back to the microcomputer after receiving the trigger signal. This feedback loop allows the microcomputer to measure the actual time interval between trigger transmission and sensor response, enabling accurate time differential calculation even with independent timers.
2Measurement precision
If the microcomputer transmits a trigger signal to synchronize with the sensor, then synchronization is improved, but transmission delay of the trigger signal causes incorrect differential value calculation
Solution Approach 1:
The microcomputer performs preliminary action by sending a trigger signal to the sensor before the actual measurement cycle begins. The sensor is prepared and synchronized to the trigger signal, allowing the system to account for and compensate for any transmission delay in the subsequent time differential calculation.
3Stability of the object's composition
If the sensor transmits the sensor signal at a constant transmission cycle, then transmission stability is improved, but cycle shift with the microcomputer's calculation cycle causes incorrect calculation
Solution Approach 1:
The system uses periodic action through the trigger signal mechanism. The microcomputer sends periodic trigger signals to the sensor at a predetermined cycle, and the sensor responds with periodic sensor signals. This periodic synchronization ensures that even with different base timers, the actual transmission and calculation cycles are aligned, enabling accurate time differential calculation.
Data Source
AI summary
A communication system includes at least one sensor apparatus including at least one sensing element and a transmission circuit, and a microcomputer including a reception circuit and a differential calculator. The sensing element detects a sensor value indicating a physical quantity of a detection target, and the transmission circuit transmits, as a digital signal, a sensor signal including information indicative of the sensor value at a predetermined transmission cycle. The reception circuit receives the sensor signal through a signal line and updates last time sensor value with present time sensor value. The differential calculator calculates, at a predetermined calculation cycle, a time differential value by performing a time differential calculation to the updated using time information provided separate from the sensor value.