Compact Hydrocarbon Vapor Detector with Proportional Sensitivity
Solution Overview
Problem
Existing combustible gas detection apparatuses in the automobile repair industry are often large, insensitive, provide limited hazard information, respond slowly, have short battery life, and require frequent battery replacements, posing health and safety risks.
Innovation Solution
A compact hydrocarbon vapor detection instrument with an electronic circuit that provides proportional electrical signals for conductivity-based detection, featuring multiple indicators for battery status and vapor concentration, along with audible signals for instant feedback, using a sensor with varying conductivity to detect hydrocarbon vapor concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If existing combustible gas detection apparatus are used, then detection function is provided, but the apparatus are physically large and heavy
Solution Approach 1:
The detector is segmented into modular functional components: a sensor element for gas detection, a signal processing unit, and a display interface. This segmentation allows each component to be optimized independently, enabling compact overall design while maintaining high detection sensitivity through specialized sensor placement and processing architecture.
Solution Approach 2:
The patent implements nested integration where the sensor element is positioned within a protective housing that also contains the electronics. The signal processing circuitry is nested within the same compact structure, with components arranged in concentric or layered configurations that maximize space utilization while preserving detection performance.
2Speed
If existing detection apparatus are used, then gas detection is possible, but response time is slow
Solution Approach 1:
The sensor element is pre-conditioned and positioned in optimal proximity to the sampling inlet, with heating elements pre-heated to operational temperature. This preliminary preparation ensures that when hydrocarbon vapor enters the detection chamber, the sensor is already in a state ready for immediate high-speed response without delay from warm-up or positioning adjustments.
Solution Approach 2:
The patent replaces mechanical sampling systems with electronic signal processing and digital signal analysis. Instead of mechanical pumps or moving parts for gas sampling, the system uses electronic sensors with rapid response characteristics and digital signal processing to achieve both fast response time and precise concentration measurement.
3Duration of action of moving object
If existing detection apparatus are used, then operation is possible, but battery life is short requiring frequent replacement
Solution Approach 1:
The detector employs periodic sampling and pulsed operation modes where the sensor is activated in intervals rather than continuously. The display and processing units operate in periodic cycles, entering low-power states between measurements. This periodic action significantly reduces average power consumption while maintaining effective detection coverage, extending battery life without compromising detection capability.
4Loss of information
If existing detection apparatus are used, then detection function is provided, but limited information regarding hazard severity is given
Solution Approach 1:
The patent implements a color-coded hazard indication system where LEDs or display elements change color based on detected vapor concentration levels. Different colors represent different hazard severity levels (e.g., green for safe, yellow for caution, red for dangerous). This provides comprehensive hazard information in an intuitively understood visual format without requiring complex displays or interfaces.
Solution Approach 2:
The system provides immediate feedback through multiple channels: visual indicators show current concentration levels and hazard severity, while audible alarms provide real-time warnings. The feedback mechanism continuously updates based on sensor input, giving users complete information about current conditions. This comprehensive feedback system delivers full hazard information through relatively simple indicator components rather than complex processing systems.
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 offers a highly sensitive, compact, and user-friendly detection system that provides immediate and accurate information on hydrocarbon vapor concentrations, improving safety and reducing battery consumption through efficient power management.
Implementation Method 1
whereof a property of conductivity is proportional to an airborne concentration of hydrocarbon vapor contiguous thereto
Data Source
AI summary
A hydrocarbon vapor detection instrument includes a hydrocarbon vapor detector, with conductivity proportional to contiguous airborne concentration of hydrocarbon vapor. The instrument further includes electronic circuitry providing an electrical signal proportional to the vapor detector conductivity and to a switch-selected sensitivity setting. The instrument further includes indicators to signal recharging status while a power switch is off and an external power supply is recharging the battery, namely that the battery is partially or fully charged and if the battery temperature is excessive, to signal that operating power is on, to signal that a low battery condition exists, and to signal different concentrations of hydrocarbon vapor. For the last of these, indicator position on a housing corresponds to vapor concentration. The instrument further includes an audible indication of power-on status and vapor concentration, changing with vapor concentration.