Vehicle Control System Delay Correction
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Solution Overview
Problem
Existing control systems for vehicles using distance information from in-vehicle cameras face inaccuracies due to delays not solely caused by transmission delays, and there is a need for techniques to correct these delays to improve control accuracy.
Innovation Solution
A control system that calculates and corrects distance information based on the time difference from when it is obtained to when it is input to the control apparatus, accounting for delays beyond transmission delays, using a clock synchronization protocol and processing units to encode, transmit, and decode the information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distance information is transmitted from information obtaining apparatus to control apparatus, then control can be performed using distance data, but delay occurs between obtaining and using the distance information
Solution Approach 1:
The patent applies preliminary action by calculating the delay time between obtaining and using distance information, then proactively correcting the distance information before control execution. The correction amount is calculated based on the relative speed of the own vehicle and the object, and the delay time, allowing the system to compensate for the delay in advance and use corrected distance information for accurate control.
2Measurement precision
If transmission delay correction is implemented, then position information accuracy improves, but other causes of delay (encoding, decoding, processing) are not addressed
Solution Approach 1:
The patent applies universality by creating a delay correction mechanism that handles multiple types of delays (transmission delay, encoding delay, decoding delay, processing delay) through a unified approach. The system calculates total delay time encompassing all these factors and applies comprehensive correction, making the solution applicable to various delay sources rather than addressing only transmission delay.
Data Source
AI summary
A control system includes an information obtaining apparatus, a network, and a control apparatus. The information obtaining apparatus includes a distance information obtaining unit configured to obtain a distance information indicating a distance to an object and a transmission unit configured to transmit the distance information obtained by the distance information obtaining unit. The control apparatus includes a reception unit configured to receive the distance information transmitted by the transmission unit via the network, a distance information correction unit configured to correct the distance information received by the reception unit, and a control unit configured to perform control using the distance information corrected by the distance information correction unit. The distance information correction unit corrects the distance information based on a time taken from when the distance information is obtained by the distance information obtaining unit until the distance information is input to the distance information correction unit.