Research On Flame Intensity Sensor System Based On Spintronic Memristor

Flame intensity is a crucial factor that defines the condition of flame combustion and is significant in many areas,including the country’s economy.In daily production,accurate measurement of the intensity of flame combustion is of great significance,it not only improves production efficiency by controlling the amount of industrial fuel consumed based on the intensity of the flame,but also makes timely decisions and proposes appropriate fire extinguishing plans based on the intensity of the flame when a fire occurs.Therefore,designing a sensor with a broad measuring range,excellent accuracy,and the ability to continually record flame intensity is crucial.A design scheme of a flame intensity sensor based on a single spintronic memristor is proposed,which consists of an ultraviolet radiation measurement unit,an infrared radiation measurement unit,and a power supply.The ultraviolet radiation measurement unit includes an ultraviolet sensor module,a PWM(Pulse width modulation,PWM)rectifier filter module and an output module.The ultraviolet sensor converts the ultraviolet radiation signal into a pulse signal for output.PWM rectification filtering performs filtering and shaping on pulse signals.The output module will display the flame combustion information.The infrared radiation measurement unit includes an infrared radiation conversion module and a spintronic memristor module.The infrared radiation conversion module converts the infrared radiation signal into an electrical signal,and the spintronic memristor module characterizes the flame intensity.After experimental verification and analysis,the designed single spin memristor flame intensity sensor can achieve the measurement of flame intensity.When the flame combustion temperature changes at a rate of 1℃/s,the flame intensity measured by the spintronic memristor array flame intensity sensor system has a variation range of 0-1.557m W/cm~2,and a sensitivity of 8.992kΩ/(m W/cm~2).A flame intensity sensor system based on a single spintronic memristor array is further designed to address the problems of small measurement range and unstable sensor measurement in flame intensity sensors with single spintronic memristors.Replace the power supply with a power pack,replace a single spintronic memristor with a spintronic memristor array structure,and add an amplifier module to the infrared radiation measurement unit.Expand the spintronic memristor module into a resistance measurement module,a resistance output module and an array initialization module.Wherein the amplifier module amplifies the electrical signal output from the infrared radiation conversion module.The resistance measurement module can convert the resistance change of the spintronic memristor into voltage information for output.The resistance output module performs differential amplification of the output voltage information.The power pack serves to power the loop and cooperate with the array initialization module to restore the initial measurement state of the spintronic memristor.The performance test of the designed flame intensity sensor has been carried out,and the test results show that flame intensity measurement can be achieved.When the flame combustion temperature variation rate is 1℃/s,the flame intensity variation range measured by the flame intensity sensor of the spin memristor array is 0-3.1m W/cm~2and the sensitivity is 4.516kΩ/(m W/cm~2).Experiments have been conducted on several situations that may interfere with the measurement performance of the sensor.When there is no open flame combustion,ambient temperature fluctuations will not interfere with the sensor’s operation.