Single Receiver Circuit Frequency Selection for Multi-Device Vehicle Systems
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Solution Overview
Problem
The high manufacturing cost of receiver systems for vehicles due to the need for multiple components to handle different signals from various systems like tire pressure detection, keyless entry, and smart entry, each with unique communication frequencies and timings.
Innovation Solution
A single receiver system for vehicles that uses a common receiver apparatus with a controlled receiver circuit to select the appropriate carrier frequency based on vehicle conditions, such as the ignition switch status, allowing it to receive signals from multiple devices with different frequencies, and includes transmission timing prediction to optimize frequency selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple receiver apparatuses are used to receive signals from different systems (tire pressure detection, keyless entry, smart entry), then signal reception reliability is improved, but manufacturing cost increases
Solution Approach 1:
The receiver apparatus is designed to perform multiple functions by receiving signals from different systems (tire pressure detection, keyless entry, smart entry) using a single receiver circuit. The receiver circuit can be tuned to different frequencies and protocols to handle various signal types, eliminating the need for separate receiver apparatuses for each system.
Solution Approach 2:
Multiple receiver functions are merged into a single receiver apparatus. The patent combines the capabilities of receiving tire pressure signals, keyless entry signals, and smart entry signals into one integrated receiver circuit, reducing component count and manufacturing cost while maintaining reliable reception across all systems.
2Adaptability or versatility
If multiple receiver apparatuses are used for different systems, then signal reception capability is improved, but device complexity increases
Solution Approach 1:
The receiver apparatus is designed with universal capability to receive and process signals from multiple different systems. A single receiver circuit is configured to handle various communication protocols and frequencies through software control, eliminating the need for multiple dedicated receiver apparatuses and thereby reducing system complexity.
Solution Approach 2:
The receiver circuit employs dynamic frequency tuning and protocol switching capabilities. The receiver can dynamically adjust its operating parameters based on the type of signal being received, allowing one receiver apparatus to adaptively handle multiple different signal types that would traditionally require separate fixed-function receivers.
3Ease of manufacture
If a single receiver circuit is used for multiple systems, then manufacturing cost is reduced, but the ability to receive multiple frequencies simultaneously is limited
Solution Approach 1:
The receiver circuit employs periodic time-division multiplexing to receive signals from multiple systems operating at different frequencies. The receiver sequentially tunes to different frequencies at predetermined time intervals, allowing it to capture signals from tire pressure sensors, keyless entry devices, and smart entry systems using a single receiver circuit without requiring simultaneous multi-frequency reception capability.
Data Source
AI summary
A vehicle-mounted receiver system includes a receiver apparatus that is controlled for receiving, in common, transmissions from a plurality of external devices such as a remote key, smart key, etc., having respectively different transmission frequencies. The receiving frequency at the current time is selected based on criteria such as the insertion/non-insertion status of the ignition key, or whether an interrogation signal has been transmitted to a specific external device so that a response transmission is be received from that device during a specific time interval and the receiving frequency is to be set accordingly during that specific interval.