Laser Handpiece Contact Detection Using Body Hum Noise
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Solution Overview
Problem
Conventional laser beam control methods require electric current application to measure contact with the skin, leading to variable results due to individual differences and skin conditions, making the process time-consuming and inefficient.
Innovation Solution
A laser beam control structure that measures hum noise from the human body without applying electric current, using a handpiece with an electrode unit connected to a control unit for amplifying and digitalizing the noise to determine contact state and control laser irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electric current is applied to measure contact between electrodes and skin, then contact detection can be achieved, but measurement results vary due to individual differences and skin conditions, making the process time-consuming
Solution Approach 1:
The patent replaces the electrical measurement system with an acoustic measurement system. Instead of applying electric current and measuring electrical conductivity, the invention uses acoustic waves (sound) to detect contact between the handpiece and skin. The acoustic sensor detects changes in acoustic wave propagation that occur when the handpiece contacts the skin, providing contact detection without electrical current application to the patient.
Solution Approach 2:
The patent changes the measurement parameter from electrical conductivity to acoustic wave characteristics. By measuring acoustic parameters (such as sound transmission, reflection, or vibration) instead of electrical parameters, the system achieves contact detection that is independent of skin electrical properties, thereby eliminating variability due to individual differences and skin conditions.
2Ease of operation
If electric current is applied through electrodes to check contact state, then contact detection is possible, but the method requires different handling for respective conditions, reducing efficiency
Solution Approach 1:
The patent replaces the electrical measurement system with an acoustic measurement system. Instead of applying electric current and measuring electrical conductivity, the invention uses acoustic waves (sound) to detect contact between the handpiece and skin. The acoustic sensor detects changes in acoustic wave propagation that occur when the handpiece contacts the skin, providing contact detection without electrical current application to the patient.
Solution Approach 2:
The acoustic-based contact detection system provides a universal detection method that works consistently across different skin types and conditions. Unlike electrical measurement that requires adaptation to individual skin resistance, the acoustic method provides a single unified approach that is equally effective for all patients, thereby improving ease of operation and treatment efficiency.
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
Enables efficient and rapid laser beam irradiation without electric current application, allowing for consistent treatment regardless of skin conditions and maintaining the handpiece in a perpendicular position for improved treatment efficiency.
Implementation Method 1
at least one electrode unit positioned at a human body contact portion of the handpiece and receiving hum noise generated from a human body
Implementation Method 2
an amplification unit for amplifying the measured hum noise
Implementation Method 3
a modulation unit for converting the hum noise applied from the amplification unit into a digital signal
Implementation Method 4
a laser fiber 12 made of sapphire to irradiate laser beams, which are output from a laser beam output device
Implementation Method 5
a collimating lens 14 for converting the laser beams irradiated from the laser fiber 12 into collimated light
Implementation Method 6
a reflector 16 for changing a beam path of the laser beams output through the collimated lens 14
Implementation Method 7
a focusing lens 18 for focusing the laser beams reflected by the reflector so that the laser beams can be irradiated on a position
Data Source
AI summary
The present invention relates to a laser beam control structure and method. A laser beam control structure of the present invention comprises a handpiece for irradiating laser beams output from a laser beam output device, on a predetermined part; at least one electrode unit positioned at a human body contact portion of the handpiece and receiving hum noise generated from a human body; and a control unit electrically connected to the electrode unit so as to measure the hum noise applied from the electrode unit and to cause the laser beams to be irradiated according to the measured hum noise. According to the present invention, there are advantages in that various types of hum noise generated from a human body are measured without applying an electric current to the human body, and a laser beam is irradiated according to the measured hum noise.