Mh Mq Sensor Flying Fish __exclusive__ May 2026

The flying fish passed closest to S1 at t≈120 ms. 7. Troubleshooting & False Positives | Symptom | Likely cause | Fix | |---------|--------------|-----| | Constant high readings | Sensor aging / contamination | Bake at 100°C for 1 hour (outside) | | No response to moving source | Load resistor too high | Reduce RL to 4.7 kΩ | | Slow recovery after peak | Enclosed space, no air flow | Add a small fan for ventilation | | False positives (no gas) | Temperature surge | Apply digital low‑pass filter (moving average n=5) | 8. Useful Code Snippet (Arduino) int mqPins[] = A0, A1, A2; float baseline[3]; void setup() Serial.begin(9600); for (int i=0; i<3; i++) baseline[i] = analogRead(mqPins[i]); delay(100);

Date: April 14, 2026 Subject: Using MQ-2 / MQ-135 sensors to detect transient, moving gas plumes (“flying fish”) Prepared for: Hobbyists, environmental monitoring, and robotics developers 1. Objective To design a low‑cost, real‑time detection system that identifies and tracks a moving gas source (the “flying fish”) using one or more MQ sensors, with emphasis on sensitivity, response time, and false‑positive rejection. 2. Sensor Selection | Sensor | Target Gases | Best for “Flying Fish” | Response Time | Heating Current | |--------|--------------|------------------------|---------------|----------------| | MQ-2 | LPG, propane, smoke, methane | Yes – fast response to combustible gases | <10s | ~750 mA | | MQ-3 | Alcohol, ethanol vapor | Ideal for ethanol “flying fish” | <10s | ~750 mA | | MQ-135 | CO2, ammonia, benzene, smoke, alcohol | Wide range, good for indoor air plumes | <20s | ~800 mA | mh mq sensor flying fish

// Triangulation using peak times and amplitudes The flying fish passed closest to S1 at t≈120 ms