Vehicle Door Handle Module Pulse Transformer Rising Section Detection
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Solution Overview
Problem
Conventional touch sensor-based door handle modules for vehicles are prone to malfunctions due to sensitivity issues in detecting capacitance changes, especially in varying operating environments like rain, and require processing numerous effective pulses, leading to degraded processing speed.
Innovation Solution
A door handle module that transforms a first discharge pulse into a second discharge pulse with a rising voltage section, allowing for the generation of effective pulses using voltages detected in this section, which are then amplified and used to determine the approach of a human body, reducing sampling errors and increasing processing speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional touch sensor detects capacitance changes using the falling section of discharge pulses, then the sensor can detect human body approach, but the processing speed is degraded due to requiring numerous pulse samples and the system becomes prone to malfunctions in varying environments
Solution Approach 1:
The patent inverts the conventional detection approach by using the rising section of the transformed discharge pulse instead of the falling section. The pulse transformer converts the original discharge pulse into a transformed pulse with a rising voltage section, and the effective pulse generator detects voltages during this rising section. This inversion allows for faster processing with fewer samples while maintaining detection accuracy, resolving the contradiction between reliability and productivity.
2Adaptability or versatility
If the touch sensor operates in varying environmental conditions such as rain, then the system must maintain detection capability, but sensitivity issues cause malfunctions due to environmental interference
Solution Approach 1:
The patent introduces a pulse transformer as an intermediary component between the touch sensor and the detection circuit. This transformer converts the original discharge pulse into a transformed pulse with distinct rising and falling sections, creating a more robust signal that is less susceptible to environmental interference. The intermediary transformation process enhances the signal's immunity to environmental factors like rain, thereby improving both adaptability and reliability.
3Measurement precision
If the system processes numerous effective pulses to determine human body approach, then detection accuracy is maintained, but the response time increases and processing speed degrades
Solution Approach 1:
The patent extracts only the critical voltage information from the rising section of the transformed discharge pulse, rather than processing numerous complete pulses. The effective pulse generator identifies and processes only the relevant voltage transitions during the rising section, which contains sufficient information to determine human body approach. This extraction approach maintains detection accuracy while significantly reducing the number of processing operations required, thus decreasing response time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the robustness of the system by accurately detecting human approach with fewer effective pulses, minimizing response time and preventing malfunctions, even in challenging environments.
Implementation Method 1
a pulse transformer configured to transform a first discharge pulse of a first voltage level (V1), which is discharged from a touch sensor, to a second discharge pulse with a rising section in which the first discharge pulse increases to a second voltage level (V2)
Implementation Method 2
The sensor 400 is embedded in a vehicle door handle and configured to detect a part of a human body that approaches the door handle, and may be a touch sensor, such as a capacitive sensor. That is, the capacitive sensor detects a capacitance changed when a part of a human body approaches.
Data Source
AI summary
Disclosed is a door handle module for a vehicle. The module includes a pulse transformer configured to transform a first discharge pulse ({circle around (7)}) of a first voltage level (V1), which is discharged from a touch sensor, to a second discharge pulse {circle around (8)} with a rising section which increases the first discharge pulse ({circle around (7)}) to a second voltage level (V2) which is higher than the first voltage level; an effective pulse generator configured to generate an effective pulse ({circle around (10)}) using a voltage detected in the rising section of the second discharge pulse ({circle around (8)}); and a charge amplifier configured to amplify the effective pulse ({circle around (10)}) to an analog voltage in an analog form and output the amplified analog voltage as a signal for controlling locking and unlocking of a vehicle door.