Keyless Entry Remote Control Code Segmentation

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Solution Overview

Problem

Conventional keyless entry systems for vehicles face increased battery consumption due to continuous signal transmission and reception for detecting input times, leading to reduced device longevity.

Innovation Solution

A keyless entry system that divides function codes into a basic function code field and a window function code field, allowing the remote control key to selectively modulate and transmit signals based on switch duration times, reducing unnecessary power usage and enabling simultaneous control of doors, windows, and sunroofs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the keyless entry system continuously transmits and receives signals for detecting input time, then the input time detection accuracy is improved, but the battery consumption of the remote control key is increased

Engineering Contradiction:

Improveinput time detection accuracyVSAvoidbattery consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The system transitions from continuous signal transmission to periodic action by measuring the duration the button is pressed (on-duration time) and transmitting only when a function code is selected. This reduces battery consumption while maintaining input time detection capability through the timer that measures button press duration.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system performs preliminary measurement of the button on-duration time before transmitting signals. The timer measures the button press duration in advance, and only after the measurement is complete and a function code is selected does the system transmit the signal, avoiding continuous transmission.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If the function code field is divided into basic function code field and window function code field, then the window control precision is improved, but the device complexity is increased

Engineering Contradiction:

Improvewindow control precisionVSAvoidcode field structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The function code field is segmented into a basic function code field (31 bits) and a window function code field (4 bits). This segmentation allows precise window control through the additional field while maintaining the basic door control functionality, resolving the contradiction between precision and complexity.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS10089800B2Keyless entry system and control method for the same

Publication Date: 2018.10.02 HYUNDAI MOTOR CO LTD

AI summary

A keyless entry system for remotely controlling a door and a window of a vehicle includes: a remote control key that stores a plurality of function codes, selects a function code corresponding to an on-duration time of a lock switch or an on-duration time of an unlock switch, modulates the selected function code to a wireless signal, and transmits the wireless signal; and a receiving device that receives the wireless signal, demodulates the wireless signal into the function code, and outputs a door control signal or a window control signal according to the modulated function code, where the function code is divided into a basic function code field and a window function code field.