1. A CO alarm for a battery-type generator, comprising:

the MCU control unit U2 is used for analyzing and processing signals, is in a deep sleep state when the generator does not run, and wakes up a working state when the engine runs into sleep addition;

the CO sensor detection unit U3 is connected with the MCU control unit and is used for converting the concentration of CO in the environment into corresponding electric signals and outputting the electric signals to the MCU control unit U2 for processing, and the CO sensor detection unit U3 comprises a sensor polarization-prevention circuit, a sensor self-checking circuit, a primary amplification circuit, a sensor J3, a secondary amplification circuit and a filter circuit;

the alarm prompting unit U4 is connected with the MCU control unit and is used for carrying out alarm prompting and alarm fault prompting on the CO concentration;

the rotating speed detection unit U5 connected with the MCU control unit is used for acquiring the running state of the generator and simultaneously awakening the MCU control unit U2 to enter a normal working state from a deep sleep state;

the flameout control unit U6 is connected with the MCU control unit and is used for shutting down the generator when the alarm fails or the CO concentration gives an alarm;

the battery power supply unit U1 is used for providing a working power supply required by the whole CO alarm;

the primary amplifying circuit is characterized by comprising 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.

2. The CO alarm for the battery-type generator according to claim 1, wherein: the battery power supply unit comprises a battery BT1 and a capacitor C1.

3. The CO alarm for the battery-type generator according to claim 1, wherein: the MCU control unit U2 includes singlechip IC1, electric capacity C3, resistance R6 and electric capacity C4.

4. The CO alarm for the battery-type generator according to claim 1, wherein: the alarm prompting unit U4 comprises a lamp LED4, a lamp LED3, a resistor R27 and a resistor R28.

5. The CO alarm for the battery-type generator according to claim 1, wherein: the rotating speed detection unit U5 comprises a normally closed circuit, a resistor R1, a resistor R3, a resistor R4, an external engine igniter flameout module L0_ CO, a diode D1, a triode Q1, a MOS tube Q2, a resistor R4 and a capacitor C10.

6. The CO alarm for the battery-type generator according to claim 1, wherein: the flameout control unit U6 comprises a switch tube Q5, a resistor R17, a resistor 18 and a capacitor C6.

Background

The portable generator is widely applied due to the advantages of small size, mobility, strong adaptability to working environment and the like. However, because the generator drives the magneto to output power through the gasoline engine, a large amount of harmful CO gas can be generated in the use process, and in many household applications, many casualties are caused by neglecting the CO emission problem. Many countries have begun to impose safety requirements on such products for the mandatory installation of CO alarms. In order to meet market requirements, the invention provides a CO alarm for a battery type generator.

Disclosure of Invention

The invention provides a CO alarm for a battery type generator, aiming at overcoming the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a CO alarm for a battery-type generator, comprising:

the MCU control unit U2 is used for analyzing and processing signals, is in a deep sleep state when the generator does not run, and wakes up a working state when the engine runs into sleep addition;

the CO sensor detection unit U3 is connected with the MCU control unit and is used for converting the CO concentration in the environment into corresponding electric signals and outputting the electric signals to the MCU control unit U2 for processing;

the alarm prompting unit U4 is connected with the MCU control unit and is used for carrying out alarm prompting and alarm fault prompting on the CO concentration;

the rotating speed detection unit U5 connected with the MCU control unit is used for acquiring the running state of the generator and simultaneously awakening the MCU control unit U2 to enter a normal working state from a deep sleep state;

the flameout control unit U6 is connected with the MCU control unit and is used for shutting down the generator when the alarm fails or the CO concentration gives an alarm;

the battery power supply unit U1 is used for providing a working power supply required by the whole CO alarm; when the generator generates excessive CO, the CO concentration in the environment is converted into a corresponding electric signal through the CO sensor detection unit U3 and then is output to the MCU control unit U2 for processing, and the signal is sent to the alarm prompt unit and the flameout control unit after being processed by the MCU control unit U2, so that the CO concentration is subjected to alarm prompt, and the generator is turned off to operate, so that safety accidents are prevented.

Preferably, the battery power supply unit comprises a battery BT1 and a capacitor C1.

Preferably, the MCU control unit U2 includes a single chip microcomputer IC1, a capacitor C3, a resistor R6 and a capacitor C4.

Preferably, the CO sensor detection unit U3 includes a sensor polarization prevention circuit, a sensor self-test circuit, a primary amplification circuit, a sensor J3, a primary filter, an operational amplification unit IC2_2, a secondary amplification circuit, an operational amplification unit IC2_1, and a filter circuit.

Preferably, the alarm prompting unit U4 includes a lamp LED4, a lamp LED3, a resistor R27, and a resistor R28.

Preferably, the rotation speed detecting unit U5 includes a normally closed circuit, a resistor R1, a resistor R3, a resistor R4, an external engine igniter flameout module L0_ CO, a diode D1, a triode Q1, a MOS transistor Q2, a resistor R4, and a capacitor C10.

Preferably, the extinction control unit U6 includes a switch Q1, a resistor R17, a resistor 18, and a capacitor C6.

To sum up, when the generator produces excessive CO, the CO concentration in the environment is converted into corresponding electric signals through the CO sensor detection unit U3 and is output to the MCU control unit U2 for processing, and the MCU control unit U2 processes the signals and sends the signals to the alarm prompt unit and the flameout control unit, so that the CO concentration is subjected to alarm prompt, and the generator is turned off to operate, so that safety accidents are prevented.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a circuit configuration diagram of the battery power supply unit U1.

Fig. 3 is a circuit configuration diagram of the MCU control unit U2.

Fig. 4 is a circuit configuration diagram of the CO sensor detection unit U3.

Fig. 5 is a circuit configuration diagram of the alarm notification unit U4.

Fig. 6 is a circuit configuration diagram of the rotation speed detecting unit U5.

Detailed Description

As shown in fig. 1 to 6, a CO alarm for a battery type generator includes: the gas sensor comprises an MCU control unit U2, a CO sensor detection unit U3, an alarm prompt unit U4, a rotating speed detection unit U5, a flameout control unit U6 and a battery power supply unit U1, wherein the MCU control unit U2 comprises a single chip microcomputer IC1, a capacitor C3, a resistor R6 and a capacitor C4, the single chip microcomputer IC1 adopts a single chip microcomputer with temperature detection, and can acquire the ambient temperature of the MCU control unit U2 and compensate the change of the gas sensor caused by the temperature change; the capacitor C4 is a filter capacitor and filters the reset pin of the singlechip IC1 through a resistor R4 and a capacitor C4; the capacitor C3 is a filter capacitor.

Specifically, the CO sensor detection unit U3 detects CO gas concentration and outputs a weak electrical signal, amplifies the weak electrical signal and outputs the weak electrical signal to the MCU control unit U2, which includes a sensor anti-polarization circuit, a sensor self-detection circuit, a primary amplification circuit, a sensor J3, a primary filter, a secondary amplification circuit, a capacitor C5, an operational amplification unit IC2_2, a resistor 19, a capacitor C19, and a filter circuit, wherein the sensor anti-polarization circuit is composed of a resistor R9 and a switching tube Q3; the sensor self-checking circuit consists of a resistor R11, a switching tube Q4 and a resistor R21; the primary amplification circuit consists of a resistor R14, a resistor R10, a capacitor C8, a resistor R15 and an operational amplification unit IC2_1, and can amplify an electric signal output by the sensor J3; the capacitor C5 is a filter capacitor, and can form primary filtering through the resistor R15 and the capacitor C5, and the primary amplifying circuit amplifies the electric signal output by the sensor J3, forms primary filtering through the R15 and the C5, and transmits the primary filtering to the operational amplification unit IC2_ 2; the two-stage amplifying circuit is composed of a resistor R22 and a resistor R23, the filter circuit is composed of a capacitor C18 and a capacitor C19, and is used for filtering the operational amplifying unit IC2_2 and the operational amplifying unit IC2_1, and the filtered signals are input to an AD1 port of a U2 module IC1 through a resistor R19 and a capacitor C17.

Specifically, the alarm prompting unit U4 includes a lamp LED4, a lamp LED3, a resistor R27, and a resistor R28, the lamp LED4 is a red light, and is connected to an I/O4 pin of the single chip microcomputer IC1, and is used for a CO concentration alarm indication, which includes a CO concentration peak alarm indication and a CO concentration mean alarm indication; the lamp LED3 is a yellow lamp, is connected to an I/O3 pin of the singlechip IC1 and is used for module fault alarm indication, and the fault alarm indication comprises battery low-voltage fault indication, alarm high-temperature fault indication, sensor fault indication and the like; the resistor R27 and the resistor R28 are current-limiting resistors.

Preferably, the rotation speed detecting unit U5 includes a normally closed circuit, a resistor R1, a resistor R3, a resistor R4, an external engine igniter flameout module L0_ CO, a diode D1, a triode Q1, a MOS transistor Q2, a resistor R4, and a capacitor C10; the normally closed circuit consists of an MOS (metal oxide semiconductor) tube Q2, a resistor R2, a capacitor C2 and an I/O5 pin of a singlechip IC 1; the resistor R1 is a rotating speed signal pull-up resistor; the resistor R3 is a base current limiting resistor of a triode Q1; the resistor R4 is a pull-down bias resistor of the diode Q1, and prevents the diode Q1 from being triggered by mistake; diode D1 prevents reverse voltage ingress from the external engine igniter shutdown module L0 — CO input voltage into the module; the capacitor C10 is a filter capacitor, filters the detected rotating speed signal and then inputs the rotating speed signal to a pin of the singlechip IC 1I/O6.

Specifically, the flameout control unit U6 includes a switch Q5, a resistor R17, a resistor 18, and a capacitor C6; the resistor R17 and the switch tube Q5 control ignition trigger voltage input by an external engine igniter flameout module L0_ CO, and the ignition trigger voltage is directly connected to the ground when flameout is needed, so that the purpose of flameout of an igniter is achieved; the resistor R18 and the capacitor C6 form a filter circuit to prevent the switch tube Q5 from being triggered by mistake.

Specifically, the battery power supply unit comprises a battery BT1 and a capacitor C1, and the battery BT1 is a non-rechargeable battery; and the capacitor C1 is a filter capacitor and is used for filtering the output voltage of the battery.