Co alarm for battery type generator

A CO alarm for a battery type generator, comprising:

• a MCU control unit U2, configured to analyze and process signals, which is in a deep sleep state when the generator is not running, and enters a sleep plus timing wake-up working state after the engine is running;
• a CO sensor detection unit U3 connected to the MCU control unit, configured to convert the CO concentration in the environment into a corresponding electrical signal and output to the MCU control unit U2 for processing, the CO sensor detection unit U3 comprises a sensor anti-polarization circuit, a sensor self-checking circuit, a primary amplifying circuit, a sensor J3, a secondary amplifying circuit and a filter circuit;
• an alarm indication unit U4 connected to the MCU control unit, configured to give an alarm prompt for the CO concentration and an alarm failure prompt;
• a speed detection unit U5 connected to the MCU control unit, configured to collect the running status of the generator and wake up the MCU control unit U2 from the deep sleep state to the normal working state;
• a flameout control unit U6 connected to the MCU control unit, configured to shut down the generator when the alarm fails or the CO concentration alarms;
• a battery power supply unit U1, configured to provide a working power supply required for the entire CO alarm;
• wherein, the primary amplifying circuit comprises a resistor R14, a resistor R10, a capacitor C8, a resistor R15, and an operational amplifying unit IC2_1;
• the sensor anti-polarization circuit comprises a resistor R9 and a switch tube Q3;
• the sensor self-checking circuit comprises a resistor R11, a switch tube Q4 and a resistor R21.