A fuel generator safety monitoring device and monitoring method

Abstract

The invention discloses a fuel generator safety monitoring device and monitoring method, which relates to the technical field of fuel engines, including: a first power supply is connected to the input end of a power selection circuit, the output end of the power selection circuit is connected to the input end of a DC / DC conversion circuit, the DC / DC conversion circuit is connected to a central processing circuit, a CO detection circuit, an acceleration detection circuit, a temperature detection circuit, an audible and visual alarm circuit, and a data storage circuit; the CO detection circuit, the acceleration detection circuit, the temperature detection circuit, the UPS power monitoring circuit, the audible and visual alarm circuit, the fuel engine control module, the data storage circuit, and the wireless antenna are connected to the central processing circuit. The invention has the advantages of being able to remotely view CO gas concentration and alarm information, remotely start and shut down the fuel generator, greatly reducing the occurrence of CO poisoning events, and being easy to install, small in size, high in integration, and high in efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel engine, and more specifically to a fuel engine generator safety monitoring device and monitoring method. Background Art

[0002] Fuel-powered motors are widely used in home emergency power supply, industrial production and other fields due to their convenience, especially in areas with relatively weak power grid construction and power shortage. Fuel-powered generators generate electricity by burning gasoline, diesel or propane. As a product of the combustion process, carbon monoxide may be released through the exhaust pipe. Generators equipped with engines usually have warning instructions to inform users that the generator must be used in a ventilated environment to avoid poisoning or even death due to accidental inhalation of carbon monoxide.

[0003] However, due to the lack of safety knowledge among users, improper operation often causes casualties when using generators equipped with engines in poorly ventilated or closed environments such as homes. The fundamental reason is that the concentration of carbon monoxide (CO) exceeds the standard, causing poisoning of users. Currently, many fuel generators on the market are equipped with carbon monoxide monitoring devices, which give an alarm when the carbon monoxide concentration exceeds the standard, and some devices can achieve the shutdown function.

[0004] As described in the utility model patent (CN204239121U), the generator set control device with carbon monoxide gas concentration monitoring uses a carbon monoxide sensor to monitor the carbon monoxide gas concentration around the generator set in real time and output a signal to the control module. When the output signal reaches a set safety threshold, the control module shuts down the generator set and sends an alarm signal.

[0005] As described in the utility model patent (CN205374415U), a carbon monoxide monitoring and processing system for a generator includes a power supply module, a carbon monoxide monitoring alarm device, and an ignition short-circuit circuit. It can be fixed on the generator or connected to the generator by external wiring for control so as to automatically shut down the generator when the carbon monoxide concentration exceeds the standard.

[0006] Disadvantages of the existing technology: 1. The CO gas concentration data of the existing monitoring device can only be viewed when it is close to the fuel generator. When the monitoring device is far away from the user, the user will not be able to view the CO gas concentration and alarm conditions around the fuel generator. 2. The monitoring data cannot be saved locally, and users and manufacturers cannot obtain continuous monitoring data and alarm information, which is not conducive to the technical improvement of fuel generator equipment manufacturers. 3. The remote monitoring of the uninterruptible power supply (UPS) is mainly achieved using GPRS or SMS modules; in places where the signal is not covered, monitoring cannot be completed, which has certain disadvantages. Summary of the invention

[0007] The technical problem to be solved by the present invention is that the CO gas concentration, UPS power supply and alarm status around the fuel generator cannot be checked at a long distance and local storage cannot be achieved.

[0008] The present invention solves the above technical problems through the following technical solutions, and the specific technical solutions are as follows:

[0009] A fuel generator safety monitoring device, comprising: a first power supply, a power selection circuit, a DC / DC conversion circuit, a central processing circuit, a CO detection circuit, an acceleration detection circuit, a temperature detection circuit, an audible and visual alarm circuit, a UPS power supply monitoring circuit, a fuel engine control module, a data storage circuit, and a wireless antenna;

[0010] The first power supply is connected to the input end of the power selection circuit, the output end of the power selection circuit is connected to the input end of the DC / DC conversion circuit, and the output end of the DC / DC conversion circuit is connected to the central processing circuit, the CO detection circuit, the acceleration detection circuit, the temperature detection circuit, the sound and light alarm circuit, and the data storage circuit;

[0011] The CO detection circuit, the acceleration detection circuit, the temperature detection circuit, the sound and light alarm circuit, the fuel engine control module, the data storage circuit, and the wireless antenna are connected to the central processing circuit; the UPS power supply monitoring circuit is connected to the central processing circuit via a USB to UART interface.

[0012] Furthermore, the central processing circuit includes a central processing unit, a second capacitor C2, a fourth resistor R4, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first passive crystal oscillator Y1, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a second passive crystal oscillator Y2, a ninth capacitor C9, a first inductor L1, a tenth capacitor C10, a second inductor L2, an eleventh capacitor C11, a twelfth capacitor C12, a third inductor L3, a thirteenth capacitor C13, a fourth inductor L4, and a fourteenth capacitor C14.

[0013] The fourth resistor R4 is connected in series with the second capacitor C2, and the non-series end of the fourth resistor R4 is connected to the output end of the DC / DC conversion circuit; the thirty-fifth pin of the central processing unit is connected to the connecting line between the fourth resistor R4 and the second capacitor C2; the third pin of the central processing unit is connected to one end of the third capacitor C3, the fourth pin of the central processing unit is connected to one end of the fourth capacitor C4, the twenty-third pin of the central processing unit is connected to one end of the fifth capacitor C5, and the two ends of the passive crystal oscillator Y1 are respectively connected to the connecting line between the third pin of the central processing unit and one end of the third capacitor C3, the fourth pin of the central processing unit and the fourth capacitor C4. The sixth capacitor C6 is connected in series with the eleventh capacitor C11, the seventh capacitor C7 is connected in series with the second inductor L2, the non-series end of the sixth capacitor C6 is connected to the first pin of the central processor, the non-series end of the seventh capacitor C7 is connected to the second pin of the central processor, one end of the first inductor L1 is connected to the connection line in which the sixth capacitor C6 and the eleventh capacitor C11 are connected in series, one end of the tenth capacitor C10 is connected to the connection line in which the seventh capacitor C7 and the second inductor L2 are connected in series, the third inductor L3, the fourth inductor L4, and the fourteenth capacitor C14 are connected in series in sequence, the non-series end of the eleventh capacitor C11, the second inductor L2, and the third inductor L3 are connected in series, and the non-series end of the eleventh capacitor C11 and the second inductor C2 are connected in series. The non-series end of the inductor L2 is connected to the non-series end of the third inductor L3, the non-series end of the fourteenth capacitor C14 is connected to the wireless antenna, one end of the twelfth capacitor C12 is connected to the non-series end of the eleventh capacitor C11, the non-series end of the second inductor L2 and the non-series end of the third inductor L3, one end of the thirteenth capacitor C13 is connected to the connection line of the third inductor L3 and the fourth inductor L4 in series; the forty-seventh pin of the central processing unit is connected to one end of the eighth capacitor C8, the forty-sixth pin of the central processing unit is connected to one end of the ninth capacitor C9, and the first pin of the second passive crystal oscillator Y2 is connected to the central The forty-seventh pin of the central processor is connected to the connecting line with one end of the eighth capacitor C8, the third pin of the second passive crystal oscillator Y2 is connected to the forty-sixth pin of the central processor and the connecting line with one end of the ninth capacitor C9, the other end of the second capacitor C2, the other end of the third capacitor C3, the other end of the fourth capacitor C4, the other end of the fifth capacitor C5, the other end of the eighth capacitor C8, the other end of the ninth capacitor C9, the other end of the tenth capacitor C10, the other end of the first inductor L1, the other end of the twelfth capacitor C12, the other end of the thirteenth capacitor C13, the second pin and the fourth pin of the second passive crystal oscillator Y2 are all grounded.

[0014] Furthermore, the first power supply includes an AC power supply, an AC / DC conversion circuit, and a DC power supply. The AC power supply is connected to the AC / DC conversion circuit, and the AC / DC conversion circuit and the DC power supply are both connected to the power selection circuit.

[0015] Furthermore, the power selection circuit includes an eleventh resistor R11, a PMOS transistor, a third diode D3, a twelfth resistor R12, a thirteenth resistor R13, a PNP transistor, and a fourth diode D4, the source of the PMOS transistor is connected to a DC power supply, the eleventh resistor R11 is connected between the DC power supply, the source connection line of the PMOS transistor and the gate of the PMOS transistor, the gate of the PMOS transistor is connected to the emitter of the PNP transistor, the drain of the PMOS transistor is connected to the anode of the third diode D3, the thirteenth resistor R13 is connected between the base of the PNP transistor and the ground, the collector of the PNP transistor is grounded, the output end of the AC / DC conversion circuit is connected to the anode of the fourth diode D4, the twelfth resistor R12 is connected to the base of the PNP transistor and the output end of the AC / DC conversion circuit and the anode connection line of the fourth diode D4, the cathode of the third diode D3 and the cathode of the fourth diode D4 are connected and serve as the output end of the first power supply.

[0016] Furthermore, the sound and light alarm circuit includes a sound alarm circuit and a light alarm circuit, the sound alarm circuit includes a first resistor R1, a second resistor R2, a third resistor R3, an NPN transistor, a first diode D1, a first capacitor C1, a buzzer, and a first power supply, the second resistor R2 is connected between the 42nd pin of the central processing unit and the base of the NPN transistor, the third resistor R3 is connected between the second resistor R2 and the base connection line of the NPN transistor and the ground, the emitter of the NPN transistor is grounded, and the collector of the NPN transistor is connected to the negative pole of the buzzer. The light alarm circuit includes a second diode D2 and a fifth resistor R5, the fifteenth pin of the central processing unit is connected to the cathode of the second diode D2, the anode of the second diode D2 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to the output end of the DC / DC conversion circuit.

[0017] Furthermore, the CO detection circuit includes a CO sensor, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first thermistor RT1, a fifteenth capacitor C15, a ninth resistor R9, a sixteenth capacitor C16, an operational amplifier, and a seventeenth capacitor C17, a fourth pin of the operational amplifier is connected to a first pin of the CO sensor and one end of the sixth resistor R6, the eighth resistor R8 is connected to the first thermistor RT1 in parallel, the seventh resistor R7 and the eighth resistor R8 connected in parallel are connected in series with the first thermistor RT1, one end of the seventh resistor R7 connected in series with the eighth resistor R8 connected in parallel and the first thermistor RT1 is connected to the fourth pin of the operational amplifier, and the first pin of the operational amplifier is connected to one end of the ninth resistor R9. The seventh resistor R7 connected in series and the eighth resistor R8 connected in parallel with the first thermistor RT1 are connected to the connecting line between the first pin of the operational amplifier and one end of the ninth resistor R9, the other end of the ninth resistor R9 is connected to the thirty-sixth pin of the central processing unit, one end of the seventeenth capacitor C17 is connected to the connecting line between the other end of the ninth resistor R9 and the thirty-sixth pin of the central processing unit, the fifth pin of the operational amplifier is connected to the output end of the DC / DC conversion circuit and one end of the sixteenth capacitor C16, the second pin of the CO sensor, the other end of the sixth resistor R6, the other end of the sixteenth capacitor C16, and the other end of the seventeenth capacitor C17 are all grounded; the second pin and the third pin of the operational amplifier are grounded.

[0018] Furthermore, the acceleration detection circuit includes an acceleration sensor and a twentieth capacitor C20, the fourth pin, the sixth pin, the seventh pin and the eighth pin of the acceleration sensor are respectively connected to the eighth pin, the seventh pin, the sixth pin and the twelfth pin of the central processing unit, the fourteenth pin and the first pin of the acceleration sensor are connected to the output end of the DC / DC conversion circuit, and the connection line with the output end of the DC / DC conversion circuit is connected to one end of the twentieth capacitor C20, and the other end of the twentieth capacitor C20 is grounded; the fifth pin, the tenth pin and the twelfth pin of the acceleration sensor are grounded.

[0019] Furthermore, the temperature detection circuit includes a tenth resistor R10 and a second thermistor RT2, the tenth resistor R10 and the second thermistor RT2 are connected in series, the non-series end of the resistor R10 is connected to the output end of the DC / DC conversion circuit, the non-series end of the second thermistor RT2 is grounded, and the thirty-ninth pin of the central processing unit is connected to the connecting line between the tenth resistor R10 and the second thermistor RT2 connected in series.

[0020] Furthermore, the data storage circuit includes a memory, an eighteenth capacitor C18, and a nineteenth capacitor C19. The eighteenth capacitor C18 and the nineteenth capacitor C19 are connected in parallel. One end of the eighteenth capacitor C18 and the nineteenth capacitor C19 connected in parallel is connected to the eighth pin of the memory, and the other end of the eighteenth capacitor C18 and the nineteenth capacitor C19 connected in parallel is grounded. The first pin, the second pin, the fifth pin, and the sixth pin of the memory are respectively connected to the fifth pin, the sixth pin, the seventh pin, and the eighth pin of the central processing unit.

[0021] The UPS power supply monitoring circuit includes a USB interface circuit and a UART interface circuit. The USB interface circuit includes a USB slot, a twenty-first capacitor C21, a twenty-second capacitor C22, and a fuse F1. The UART interface circuit includes a USB to UART chip, a twenty-third capacitor C23, a twenty-fourth capacitor C24, a fifteenth resistor R15, a sixteenth resistor R16, a twenty-fifth capacitor C25, and a twenty-sixth capacitor C26.

[0022] The S1 pin, the S2 pin, the S3 pin, and the S4 pin are fixed pins of the USB structure. The twenty-second capacitor C22 and the twenty-first capacitor C21 are connected in parallel and connected to the fuse F1, and one end of the parallel twenty-second capacitor C22 and the twenty-first capacitor C21 is connected to the 10th pin of the USB to UART chip through the fourteenth resistor R14, and the other end of the parallel twenty-second capacitor C22 and the twenty-first capacitor C21 is grounded. The other end of the fuse F1 is connected to the first pin of the USB slot, and the second pin and the third pin of the USB slot are connected to the seventh pin and the sixth pin of the USB to UART chip through the fifteenth resistor R15 and the sixteenth resistor R16 respectively. The second pin of the USB slot is connected to the twenty-third capacitor C2 on the connecting line connected to the fifteenth resistor R15. 3, one end of the 24th capacitor C24 on the connecting line connected to the third pin of the USB slot and the sixteenth resistor R16, the other ends of the 23rd capacitor C23 and the 24th capacitor C24 are grounded, one end of the pin of the fourteenth resistor R14 not connected to the USB slot is connected to one end of the 25th capacitor C25, the other end of the 25th capacitor C25 is grounded, the ninth pin, the eighth pin and the first pin of the USB to UART chip are all grounded through the twenty-sixth capacitor C26, the third pin, the thirteenth pin and the seventh pin of the USB to UART chip are grounded, and the fifteenth pin, the second pin, the sixteenth pin and the fourth pin of the USB to UART chip are respectively connected to the twenty-sixth pin, the twenty-seventh pin, the twenty-eighth pin and the twenty-ninth pin of the central processing unit.

[0023] The USB slot is Micro USB 2.0.

[0024] The USB to UART chip is FT230.

[0025] A monitoring method for a fuel generator safety monitoring device is provided, comprising the following specific steps:

[0026] Step 1: Turn on the monitoring device and initialize it, set the CO concentration threshold setting1, CO concentration warning threshold setting2, CO concentration alarm threshold setting3, start-up threshold time T2, and the number of consecutive times exceeding the threshold N;

[0027] Step 2: The acceleration detection circuit detects that the fuel engine is not turned on, and the CO detection circuit collects data within the time T1 and extracts the characteristic value Value1;

[0028] The CO concentration threshold value setting1 is compared with the extracted characteristic value Value1. If the characteristic value Value1 is greater than the CO concentration threshold value setting1, the data collected by the CO detection circuit and the prompt information that the startup conditions are not met are transmitted to the mobile terminal through the wireless antenna. At this time, if the user forcibly starts the fuel engine, a warning is given on the mobile terminal.

[0029] Step 3: After the fuel engine is turned on, the CO gas concentration will slowly rise as the fuel engine starts, and reach a stable working state after the startup threshold time T2; if the startup time is greater than the startup threshold time T2, extract the feature data of the data, use the sliding average filter or the median filter method to process, perform data feature extraction again, and obtain the feature value Value2; if the startup time is less than T2, continue to wait and do not extract data;

[0030] Step 4: When it is determined whether the characteristic value Value2 is greater than the set value Setting2, and the continuous cumulative number of times that it is greater than Setting2 is greater than N, the warning mechanism is activated, and the warning information is sent to the mobile terminal through the wireless antenna to prompt the user, and the user handles it according to the prompt information;

[0031] Step 5: If the characteristic value Value2 exceeds the setting value Setting3, and the continuous cumulative number of times it is greater than Setting3 is greater than N, the alarm mechanism is activated. After being processed by the central processing circuit, the alarm signal is sent to the mobile terminal through the wireless antenna, and the fuel engine is controlled to shut down; the central processing circuit will save the monitoring data and status in the local data storage circuit of the device.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] The invention relates to a fuel generator safety monitoring device, which is easy to install, small in size, and highly integrated. The CO gas concentration and alarm status are only realized locally, and are easily accepted by manufacturers and users.

[0034] By using wireless communication technology, users can use mobile terminals to remotely view CO gas concentration and alarm information, and remotely start and shut down fuel generators, greatly reducing the occurrence of CO poisoning incidents.

[0035] By transmitting monitoring data to the cloud via mobile terminals, manufacturers can better improve their product performance based on the data in the cloud.

[0036] The device stores the data collected by the detection circuit through the data storage circuit, thereby ensuring the integrity of the monitoring data and the alarm information.

[0037] The status code of the UPS power supply can be sent to a mobile terminal via Bluetooth wireless communication technology, so the status of the UPS power supply can be monitored remotely to extend its service life.

[0038] The invention relates to a fuel generator safety monitoring method, which can monitor CO concentration more efficiently and accurately; and can effectively prevent misjudgment by using a sliding average filter or a median average filter method. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The present invention is a schematic diagram of the overall structure of a fuel generator safety monitoring device according to an embodiment of the present invention.

[0040] Figure 2 The present invention is a central processing circuit diagram of a fuel generator safety monitoring device according to an embodiment of the present invention.

[0041] Figure 3 The present invention is a power supply selection circuit diagram of a fuel generator safety monitoring device according to an embodiment of the present invention.

[0042] Figure 4 The present invention is a sound alarm circuit diagram of a fuel generator safety monitoring device according to an embodiment of the present invention.

[0043] Figure 5 The present invention is a light alarm circuit diagram of a fuel generator safety monitoring device according to an embodiment of the present invention.

[0044] Figure 6 The present invention is a CO detection circuit diagram of a fuel generator safety monitoring device according to an embodiment of the present invention.

[0045] Figure 7 The present invention is an acceleration detection circuit diagram of a fuel generator safety monitoring device according to an embodiment of the present invention.

[0046] Figure 8This is a temperature sensor detection diagram of a fuel generator safety monitoring device according to an embodiment of the present invention.

[0047] Fig. 9 The invention discloses a data storage circuit of a fuel generator safety monitoring device according to an embodiment of the present invention.

[0048] Fig.10 The present invention is a power supply detection circuit connection diagram of a fuel generator safety monitoring device according to an embodiment of the present invention.

[0049] Fig.11 The present invention is a flowchart of a fuel generator safety monitoring method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0051] like Figure 1 As shown, a fuel generator safety monitoring device includes: a first power supply, a power selection circuit, a DC / DC conversion circuit, a central processing circuit, a CO detection circuit, an acceleration detection circuit, a temperature detection circuit, a UPS power monitoring circuit, an audible and visual alarm circuit, a fuel engine control module, a data storage circuit, and a wireless antenna;

[0052] The first power supply is connected to the input end of the power selection circuit, the output end of the power selection circuit is connected to the input end of the DC / DC conversion circuit, and the output end of the DC / DC conversion circuit is connected to the central processing circuit, the CO detection circuit, the acceleration detection circuit, the temperature detection circuit, the sound and light alarm circuit, and the data storage circuit;

[0053] The CO detection circuit, acceleration detection circuit, temperature detection circuit, sound and light alarm circuit, UPS power supply monitoring circuit, fuel engine control module, data storage circuit, wireless antenna and central processing circuit are connected.

[0054] Specifically, the detection device converts AC power into 12V-24V DC power through an AC / DC conversion circuit, and also has a 12V DC power supply. The two different power supplies are selected as the power supply for each circuit through a selection module, and then the 12V-24V DC power is converted into 3.3V through a DC / DC conversion circuit, and the central processing circuit, CO detection circuit, acceleration detection circuit, temperature detection circuit, sound and light alarm circuit, and data storage circuit are powered. The CO detection circuit, acceleration detection circuit, temperature detection circuit, UPS power monitoring circuit, respectively detect CO concentration, the start and stop status of the fuel generator, the onboard temperature of the monitoring device, and the service life of the UPS, and transmit the detected data to the central processing circuit. Through the processing of the central processing circuit, it is determined whether the data exceeds the set threshold. If the threshold is exceeded, the sound and light alarm circuit is controlled to alarm. Through the wireless antenna connected to the central processing circuit, the data is sent to the mobile terminal for the user to know the status of the fuel generator in real time. The central processing circuit transmits the received data to the data storage circuit for storage, which is convenient for the user to extract the data for analysis.

[0055] like Figure 2 As shown, the central processing circuit includes a central processing unit, a capacitor C2, a resistor R4, a capacitor C3, a capacitor C4, a capacitor C5, a passive crystal oscillator Y1, a capacitor C6, a capacitor C7, a capacitor C8, a passive crystal oscillator Y2, a capacitor C9, an inductor L1, a capacitor C10, an inductor L2, a capacitor C11, a capacitor C12, an inductor L3, a capacitor C13, an inductor L4, and a capacitor C14. Figure 2 The central processing unit is divided into U1A and U1B for description.

[0056] The resistor R4 is connected in series with the capacitor C2, and the non-series end of the resistor R4 is connected to the output end of the DC / DC conversion circuit; the 35th pin of the central processing unit is connected to the connecting line between the fourth resistor R4 and the capacitor C2; the 3rd pin of the central processing unit is connected to one end of the capacitor C3, the 4th pin of the central processing unit is connected to one end of the capacitor C4, the 23rd pin of the central processing unit is connected to one end of the capacitor C5, the two ends of the passive crystal oscillator Y1 are respectively connected to the connecting line between the 3rd pin of the central processing unit and one end of the capacitor C3, and the 4th pin of the central processing unit and one end of the capacitor C4, the capacitor C6 is connected in series with the capacitor C11, the capacitor C7 is connected in series with the inductor L2, and the non-series end of the capacitor C6 is connected in series. The end is connected to pin 1 of the central processing unit, the non-series end of capacitor C7 is connected to pin 2 of the central processing unit, one end of inductor L1 is connected to the connecting line in series with capacitor C6 and capacitor C11, one end of capacitor C10 is connected to the connecting line in series with capacitor C7 and inductor L2, inductor L3, inductor L4, and capacitor C14 are connected in series in sequence, the non-series end of capacitor C11 and the non-series end of inductor L2 are connected to the non-series end of inductor L3, and the non-series end of capacitor C14 is connected to the wireless antenna ANT1. Specifically, the non-series end of capacitor C14 is connected to pin 1 of the wireless antenna ANT1, and pins 2 and 3 of the wireless antenna ANT1 are both grounded. One end of capacitor C12 is connected to the non-series end of capacitor C11, the non-series end of inductor L2 and the non-series end of inductor L3, and one end of capacitor C13 is connected to the connection line in which inductor L3 and inductor L4 are connected in series; pin 47 of the central processing unit is connected to one end of capacitor C8, pin 46 of the central processing unit is connected to one end of capacitor C9, pin 1 of passive crystal oscillator Y2 is connected to the connection line between pin 47 of the central processing unit and one end of capacitor C8, pin 3 of passive crystal oscillator Y2 is connected to the connection line between pin 46 of the central processing unit and one end of capacitor C9, and the other end of capacitor C2, the other end of capacitor C3, the other end of capacitor C4, the other end of capacitor C5, the other end of capacitor C8, the other end of capacitor C9, the other end of capacitor C10, the other end of inductor L1, the other end of capacitor C12, the other end of capacitor C13, pin 2 and pin 4 of the second passive crystal oscillator Y2 are all grounded. The power terminals of pins 13, 22, 44 and 34 of the central processing circuit are connected to 3.3V, and other pins are also connected to corresponding signals according to the functions of the relevant pins. For example, pin 49 of the central processing unit is grounded. Among them, the central processing unit is an ARM Cortex M3 processor, which cooperates with the IEEE 802.15.1 wireless transceiver unit.

[0057] like Figure 3As shown, the AC power supply is 12V-24V, the power management system, the battery, the AC / DC conversion circuit, the battery source management system is connected to the battery to form a DC power supply, and outputs 12V DC power, the AC / DC conversion circuit and the DC power supply are connected to the power selection circuit. The power selection circuit includes a resistor R11, a PMOS transistor Q3, a diode D3, a resistor R12, a resistor R13, a PNP transistor Q2, and a diode D4. The source of the PMOS transistor Q3 is connected to a DC power supply. The resistor R11 is connected between the DC power supply, the source connection line of the PMOS transistor Q3 and the gate of the PMOS transistor Q3. The gate of the PMOS transistor Q3 is connected to the emitter of the PNP transistor Q2. The drain of the PMOS transistor Q3 is connected to the anode of the diode D3. The resistor R13 is connected between the base of the PNP transistor Q2 and the ground. The collector of the PNP transistor Q2 is grounded. The output end of the AC / DC conversion circuit is connected to the anode of the diode D4. The resistor R12 is connected to the base of the PNP transistor Q2 and the output end of the AC / DC conversion circuit and the anode connection line of the diode D4. The cathode of the diode D3 and the cathode of the diode D4 are connected and serve as the output end of the first power supply. Among them, the power management system, the battery, and the AC / DC conversion circuit belong to the first power supply.

[0058] The sound and light alarm circuit includes a sound alarm circuit and a light alarm circuit. Figure 4 As shown, the sound alarm circuit includes a resistor R1, a resistor R2, a resistor R3, an NPN transistor Q1, a diode D1, a capacitor C1, a buzzer BP1, and a 3.3V power supply. The resistor R2 is connected between the 42 pin of the central processing unit and the base of the NPN transistor Q1, that is, the mark BEEP is connected to the mark BEEP in the central processing unit. The resistor R3 is connected between the resistor R2 and the base connection line of the NPN transistor Q1 and the ground. The emitter of the NPN transistor Q1 is grounded, the collector of the NPN transistor Q1 is connected to the negative electrode of the buzzer BP1 and the anode of the diode D1, one end of the resistor R1 is connected to the positive electrode of the buzzer BP1, the cathode of the diode D1, and one end of the capacitor C1, the other end of the resistor R1 is connected to the 5V power supply, and the other end of the capacitor C1 is grounded. The light alarm circuit includes a diode D2 and a resistor R5. Pin 15 of the central processing unit is connected to the cathode of the diode D2, that is, the ALERT mark is connected to the ALERT mark in the central processing unit. The anode of the diode D2 is connected to one end of the resistor R5, and the other end of the resistor R5 is connected to the output end of the DC / DC conversion circuit, that is, the 3.3V power supply output by the output end of the DC / DC conversion circuit is received.

[0059] like Figure 6As shown, the CO detection circuit includes a CO sensor, a resistor R6, a resistor R7, a resistor R8, a thermistor RT1, a capacitor C15, a resistor R9, a capacitor C16, an operational amplifier, and a capacitor C17. Pin 4 of the operational amplifier is connected to pin 1 of the CO sensor and one end of the resistor R6. The resistor R8 is connected to the thermistor RT1 in parallel. The resistor R7 and the parallel resistor R8 are connected in series with the thermistor RT1. One end of the series resistor R7 and the parallel resistor R8 connected to the thermistor RT1 is connected to pin 4 of the operational amplifier. Pin 1 of the operational amplifier is connected to one end of the resistor R9. The other end of the series resistor R7 and the parallel resistor R8 connected to the thermistor RT1 is connected to a connection line between pin 1 of the operational amplifier and one end of the resistor R9. The other end of the resistor R9 is connected to pin 36 of the central processing unit. One end of the capacitor C17 is connected to a connection line between the other end of the resistor R9 and pin 36 of the central processing unit, that is, the same representation as in the central processing circuit is connected, namely, CO_SENSOR is marked and connected. Pin 5 of the operational amplifier is connected to the output end of the DC / DC conversion circuit and one end of the capacitor C16. Pin 2 of the CO sensor, the other end of the resistor R6, the other end of the capacitor C16, and the other end of the capacitor C17 are all grounded. Pins 2 and 3 of the operational amplifier are grounded. The operational amplifier uses OPA333A, and the CO sensor uses ME2_CO.

[0060] like Figure 7 As shown, the acceleration detection circuit includes an acceleration sensor and a capacitor C20. Pins 4, 6, 7 and 8 of the acceleration sensor are connected to pins 8, 7, 6 and 12 of the central processing unit respectively. Pins 14 and 1 of the CO sensor are connected to the output end of the DC / DC conversion circuit, and the connection line with the output end of the DC / DC conversion circuit is connected to one end of the capacitor C20, that is, the markings M_SCK, M_SDIN, M_SDO and M_LIS_CS are connected to the same markings in the central processing circuit respectively, and the other end of the capacitor C20 is grounded. Among them, the acceleration sensor can be selected from LIS3DH.

[0061] like Figure 8 As shown, the temperature detection circuit includes a resistor R10 and a thermistor RT2. The resistor R10 is connected in series with the thermistor RT2. The non-series end of the resistor R10 is connected to the output end of the DC / DC conversion circuit, that is, connected to a 3.3V power supply. The non-series end of the thermistor RT2 is grounded. Pin 39 of the central processing unit is connected to the connection line of the series resistor R10 and the thermistor RT2, that is, the NTC is marked and represents the NTC connection in the central processing circuit.

[0062] like Fig. 9As shown, the data storage circuit includes a memory U3, a capacitor C18, and a capacitor C19, wherein the capacitor C18 is connected in parallel, and one end of the parallel capacitor C18 and the capacitor C19 is connected to the 8th pin of the memory U3, and the other end of the parallel capacitor C18 and the capacitor C19 is grounded, and the 1st pin, 2nd pin, 5th pin, and 6th pin of the memory U3 are connected to the 5th pin, 6th pin, 7th pin, and 8th pin of the central processing unit, respectively, that is, the labels DIO_CS, DIO_DO, DIO_CLK, and DIO_DI are connected to the same labels in the central processing circuit. Among them, the memory can be selected from W25Q128.

[0063] like Fig.10 As shown, the UPS power supply monitoring circuit includes a USB interface circuit and a UART interface circuit. The USB interface circuit includes a USB slot, a capacitor C21, a capacitor C22, and a fuse F1. The UART interface circuit includes a USB to UART chip, a capacitor C23, a capacitor C24, a resistor R15, a resistor R16, a capacitor C25, and a capacitor C26.

[0064] The S1 pin, S2 pin, S3 pin, and S4 pin connection are fixed pins of the USB structure. Capacitors C21 and C22 are connected in parallel and connected to fuse F1, and one end of the parallel capacitors C21 and C22 is connected to pin 10 of the USB to UART chip through resistor R14, and the other end of the parallel capacitors C21 and C22 is grounded. The other end of fuse F1 is connected to pin 1 of the USB1 slot, and pins 2 and 3 of the USB1 slot are connected to pins 7 and 6 of the USB to UART chip through resistors R15 and R16 respectively. Pin 2 of the USB1 slot is connected to one end of capacitor C23 on the connecting line connected to resistor R15, and pin 3 of the USB1 slot is connected to the ground. One end of the capacitor C24 on the connection line connected to the resistor R16, the other ends of the capacitors C23 and C24 are grounded, one end of the resistor R14 not connected to the pin of the USB1 slot is connected to one end of the capacitor C25, the other end of the capacitor C25 is grounded, the 9th pin, 8th pin, and 1st pin of the USB to UART chip are all grounded through the capacitor C26, the 3rd pin, 13th pin, and 7th pin of the USB to UART chip are grounded, the 15th pin, 2nd pin, 16th pin, and 4th pin of the UATR chip are respectively connected to the 26th pin, 27th pin, 28th pin, and 29th pin of the central processor, and the corresponding distribution numbers are USB_TXD, USB_RXD, USB_RST, and USB_CTS. Among them, the USB1 slot uses MicroUSB2.0, and the USB to UART chip can use FT230.

[0065] like Fig.11 As shown, a monitoring method of a fuel generator safety monitoring device includes the following specific steps:

[0066] Step 1: Turn on the monitoring device and initialize it, set the CO concentration threshold setting1, CO concentration warning threshold setting2, CO concentration alarm threshold setting3, power-on threshold time T2, and the number of consecutive threshold exceeding times N; for example, set setting1 to 30ppm.

[0067] Step 2: The acceleration detection circuit detects that the fuel engine is not turned on, and the CO detection circuit collects data within T1 (10 seconds) to extract the characteristic value Value1; the CO detection circuit monitors the CO gas near the fuel generator in real time, while the acceleration detection circuit monitors the on and off status of the fuel engine generator, and the temperature detection circuit monitors the onboard temperature of the device, and transmits the monitoring data to the central processing circuit in real time; and compares the CO concentration threshold setting1 with the extracted characteristic value Value1. If the characteristic value Value1 is greater than the CO concentration threshold setting1, the data collected by the CO detection circuit and the prompt information that the startup conditions are not met are transmitted to the mobile terminal through the wireless antenna. At this time, if the user forcibly turns on the fuel engine, a warning is given on the mobile terminal; if the characteristic value Value1 is less than the CO concentration threshold setting1, the fuel engine is turned on;

[0068] Step 3: After the fuel engine is turned on, the CO gas concentration will slowly rise as the fuel engine starts, and reach a stable working state after the startup threshold time T2; if the startup time is greater than the startup threshold time T2, extract the feature data of the data, use the sliding average filter or the median filter method to process, and extract the data features again to obtain the feature value Value2; if the startup time is less than T2, continue to wait and do not extract data;

[0069] Step 4: When it is determined whether the characteristic value Value2 is greater than the set value Setting2, and the continuous cumulative number of times that it is greater than Setting2 is greater than N, the warning mechanism is activated, and the warning information is sent to the user APP of the mobile terminal through the wireless antenna to prompt the user, and the user handles it according to the prompt information;

[0070] Step 5: If the characteristic value Value2 exceeds the setting value Setting3, and the continuous cumulative number of times it is greater than Setting3 is greater than N, the alarm mechanism is activated. After being processed by the central processing circuit, the alarm signal is sent to the mobile terminal through the wireless antenna, and the fuel engine is controlled to shut down; the central processing circuit will save the monitoring data and status in the local data storage circuit of the device.

[0071] This device controls the opening and closing of the fuel engine by connecting the central processing circuit to the fuel engine control module. The chip of this monitoring device adopts the ARM Cortex M3 processor, with an internal integrated radio frequency module and an IEEE 802.15.1 wireless transceiver unit. By combining a high-precision CO sensor with wireless transmission, it realizes the long-distance monitoring of the CO gas concentration around the fuel generator. This monitoring device has added a data storage module. When the mobile terminal is disconnected from the monitoring device by wireless connection, the monitoring data can still be stored locally, ensuring the continuity of the monitoring data and ensuring the reliability and validity of the data. Among them, the wireless method uses Bluetooth to send.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel generator safety monitoring method, characterized in that: Methods include: S1: Turn on the monitoring device and initialize it, set the CO concentration threshold setting1, CO concentration warning threshold setting2, CO concentration alarm threshold setting3, start-up threshold time T2, and the number of consecutive times exceeding the threshold N; S2: The acceleration detection circuit detects that the fuel engine is not turned on, and the CO detection circuit collects data within T1 time and extracts the characteristic value Value1; The CO concentration threshold value setting1 is compared with the extracted characteristic value Value1. If the characteristic value Value1 is greater than the CO concentration threshold value setting1, the data collected by the CO detection circuit and the prompt information that the startup conditions are not met are transmitted to the mobile terminal through the wireless antenna. At this time, if the user forcibly starts the fuel engine, a warning is given on the mobile terminal. S3: After the fuel engine is turned on, the CO gas concentration will slowly increase as the fuel engine starts, and reach a stable working state after the startup threshold time T2; if the startup time is greater than the startup threshold time T2, extract the feature data of the data, use the sliding average filter or the median filter method to process, and extract the data features again to obtain the feature value Value2; if the startup time is less than T2, continue to wait and do not extract data; S4: When determining whether the characteristic value Value2 is greater than the setting value Setting2, and when the continuous cumulative number of times that the characteristic value Value2 is greater than Setting2 is greater than N, the warning mechanism is activated, and the warning information is sent to the mobile terminal through the wireless antenna to prompt the user, and the user handles the problem according to the prompt information; S5: If the characteristic value Value2 exceeds the setting value Setting3, and the continuous cumulative number of times it is greater than Setting3 is greater than N, the alarm mechanism is activated. After being processed by the central processing circuit, the alarm signal is sent to the mobile terminal through the wireless antenna, and the fuel engine is controlled to shut down; the central processing circuit will save the monitoring data and status in the local data storage circuit of the device.

2. The fuel generator safety monitoring method according to claim 1, characterized in that: The monitoring device includes: a first power supply, a power supply selection circuit, a DC / DC conversion circuit, a central processing circuit, a CO detection circuit, an acceleration detection circuit, a temperature detection circuit, an audible and visual alarm circuit, a UPS power supply monitoring circuit, a fuel engine control module, a data storage circuit, and a wireless antenna; The first power supply is connected to the input end of the power selection circuit, the output end of the power selection circuit is connected to the input end of the DC / DC conversion circuit, and the output end of the DC / DC conversion circuit is connected to the central processing circuit, the CO detection circuit, the acceleration detection circuit, the temperature detection circuit, the sound and light alarm circuit, and the data storage circuit; The CO detection circuit, acceleration detection circuit, temperature detection circuit, sound and light alarm circuit, fuel engine control module, data storage circuit, and wireless antenna are connected to the central processing circuit; the UPS power supply monitoring circuit is connected to the central processing circuit via a USB to UART interface.

3. The fuel generator safety monitoring method according to claim 2, characterized in that: The central processing circuit includes a central processing unit, a second capacitor C2, a fourth resistor R4, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first passive crystal oscillator Y1, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a second passive crystal oscillator Y2, a ninth capacitor C9, a first inductor L1, a tenth capacitor C10, a second inductor L2, an eleventh capacitor C11, a twelfth capacitor C12, a third inductor L3, a thirteenth capacitor C13, a fourth inductor L4, and a fourteenth capacitor C14, and the central processing unit is an ARM Cortex M3 processor; The fourth resistor R4 is connected in series with the second capacitor C2, and the non-series end of the fourth resistor R4 is connected to the output end of the DC / DC conversion circuit; the thirty-fifth pin of the central processing unit is connected to the connecting line between the fourth resistor R4 and the second capacitor C2; the third pin of the central processing unit is connected to one end of the third capacitor C3, the fourth pin of the central processing unit is connected to one end of the fourth capacitor C4, the twenty-third pin of the central processing unit is connected to one end of the fifth capacitor C5, and the two ends of the first passive crystal oscillator Y1 are respectively connected to the connecting line between the third pin of the central processing unit and one end of the third capacitor C3, the fourth pin of the central processing unit and the fourth capacitor C4. The sixth capacitor C6 is connected in series with the eleventh capacitor C11, the seventh capacitor C7 is connected in series with the second inductor L2, the non-series end of the sixth capacitor C6 is connected to the first pin of the central processor, the non-series end of the seventh capacitor C7 is connected to the second pin of the central processor, one end of the first inductor L1 is connected to the connection line in which the sixth capacitor C6 and the eleventh capacitor C11 are connected in series, one end of the tenth capacitor C10 is connected to the connection line in which the seventh capacitor C7 and the second inductor L2 are connected in series, the third inductor L3, the fourth inductor L4, and the fourteenth capacitor C14 are connected in series in sequence, the non-series end of the eleventh capacitor C11, the second inductor L2, and the third inductor L3 are connected in series, and the non-series end of the eleventh capacitor C11 and the second inductor C2 are connected in series. The non-series end of the inductor L2 is connected to the non-series end of the third inductor L3, the non-series end of the fourteenth capacitor C14 is connected to the wireless antenna, one end of the twelfth capacitor C12 is connected to the non-series end of the eleventh capacitor C11, the non-series end of the second inductor L2 and the non-series end of the third inductor L3, one end of the thirteenth capacitor C13 is connected to the connection line of the third inductor L3 and the fourth inductor L4 in series; the forty-seventh pin of the central processing unit is connected to one end of the eighth capacitor C8, the forty-sixth pin of the central processing unit is connected to one end of the ninth capacitor C9, and the first pin of the second passive crystal oscillator Y2 is connected to the central processing unit. The forty-seventh pin of the central processor is connected to the connecting line with one end of the eighth capacitor C8, the third pin of the second passive crystal oscillator Y2 is connected to the forty-sixth pin of the central processor and the connecting line with one end of the ninth capacitor C9, the other end of the second capacitor C2, the other end of the third capacitor C3, the other end of the fourth capacitor C4, the other end of the fifth capacitor C5, the other end of the eighth capacitor C8, the other end of the ninth capacitor C9, the other end of the tenth capacitor C10, the other end of the first inductor L1, the other end of the twelfth capacitor C12, the other end of the thirteenth capacitor C13, the second pin and the fourth pin of the second passive crystal oscillator Y2 are all grounded.

4. The fuel generator safety monitoring method according to claim 3, characterized in that: The first power supply includes an AC power supply, an AC / DC conversion circuit, and a DC power supply. The AC power supply is connected to the AC / DC conversion circuit, and the AC / DC conversion circuit and the DC power supply are both connected to the power supply selection circuit.

5. The fuel generator safety monitoring method according to claim 3, characterized in that: The power selection circuit includes an eleventh resistor R11, a PMOS transistor, a third diode D3, a twelfth resistor R12, a thirteenth resistor R13, a PNP transistor, and a fourth diode D4, wherein the source of the PMOS transistor is connected to a DC power supply, the eleventh resistor R11 is connected between the DC power supply, the source connection line of the PMOS transistor and the gate of the PMOS transistor, the gate of the PMOS transistor is connected to the emitter of the PNP transistor, the drain of the PMOS transistor is connected to the anode of the third diode D3, the thirteenth resistor R13 is connected between the base of the PNP transistor and the ground, the collector of the PNP transistor is grounded, the output end of the AC / DC conversion circuit is connected to the anode of the fourth diode D4, the twelfth resistor R12 is connected to the base of the PNP transistor and the output end of the AC / DC conversion circuit and the anode connection line of the fourth diode D4, the cathode of the third diode D3 and the cathode of the fourth diode D4 are connected and serve as the output end of the first power supply.

6. The fuel generator safety monitoring method according to claim 3, characterized in that: The sound and light alarm circuit includes a sound alarm circuit and a light alarm circuit. The sound alarm circuit includes a first resistor R1, a second resistor R2, a third resistor R3, an NPN transistor, a first diode D1, a first capacitor C1, a buzzer, and a first power supply. The second resistor R2 is connected between the 42nd pin of the central processing unit and the base of the NPN transistor, the third resistor R3 is connected between the second resistor R2 and the base connection line of the NPN transistor and the ground, the emitter of the NPN transistor is grounded, the collector of the NPN transistor is connected to the negative electrode of the buzzer and the anode of the first diode D1, one end of the first resistor R1 is connected to the positive electrode of the buzzer, the cathode of the first diode D1, and one end of the first capacitor C1, the other end of the first resistor R1 is connected to the output end of the DC / DC conversion circuit, and the other end of the first capacitor C1 is grounded; the light alarm circuit includes a second diode D2 and a fifth resistor R5, the fifteenth pin of the central processing unit is connected to the cathode of the second diode D2, the anode of the second diode D2 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to the output end of the DC / DC conversion circuit.

7. The fuel generator safety monitoring method according to claim 3, characterized in that: The CO detection circuit includes a CO sensor, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first thermistor RT1, a fifteenth capacitor C15, a ninth resistor R9, a sixteenth capacitor C16, an operational amplifier, and a seventeenth capacitor C17. The model of the CO sensor is ME2_CO. The fourth pin of the operational amplifier is connected to the first pin of the CO sensor and one end of the sixth resistor R6. The eighth resistor R8 is connected to the first thermistor RT1 in parallel. The seventh resistor R7 and the eighth resistor R8 connected in parallel are connected in series with the first thermistor RT1. One end of the seventh resistor R7 connected in series with the eighth resistor R8 connected in parallel and the first thermistor RT1 is connected to the fourth pin of the operational amplifier. The first pin of the operational amplifier is connected to the ninth resistor R9. The seventh resistor R7 connected in series with the eighth resistor R8 connected in parallel with the first thermistor RT1 is connected to the connecting line between the first pin of the operational amplifier and one end of the ninth resistor R9, the other end of the ninth resistor R9 is connected to the thirty-sixth pin of the central processing unit, one end of the seventeenth capacitor C17 is connected to the connecting line between the other end of the ninth resistor R9 and the thirty-sixth pin of the central processing unit, the fifth pin of the operational amplifier is connected to the output end of the DC / DC conversion circuit and one end of the sixteenth capacitor C16, the second pin of the CO sensor, the other end of the sixth resistor R6, the other end of the sixteenth capacitor C16 and the other end of the seventeenth capacitor C17 are all grounded; the second pin and the third pin of the operational amplifier are grounded.

8. The fuel generator safety monitoring method according to claim 3, characterized in that: The acceleration detection circuit includes an acceleration sensor and a twentieth capacitor C20. The model of the acceleration sensor is LIS3DH. The fourth pin, the sixth pin, the seventh pin and the eighth pin of the acceleration sensor are respectively connected to the eighth pin, the seventh pin, the sixth pin and the twelfth pin of the central processing unit. The fourteenth pin and the first pin of the acceleration sensor are connected to the output end of the DC / DC conversion circuit, and the connection line with the output end of the DC / DC conversion circuit is connected to one end of the twentieth capacitor C20, and the other end of the twentieth capacitor C20 is grounded; the fifth pin, the tenth pin and the twelfth pin of the acceleration sensor are grounded.

9. The fuel generator safety monitoring method according to claim 3, characterized in that: The temperature detection circuit includes a tenth resistor R10 and a second thermistor RT2. The tenth resistor R10 is connected in series with the second thermistor RT2. The non-series end of the resistor R10 is connected to the output end of the DC / DC conversion circuit. The non-series end of the second thermistor RT2 is grounded. The thirty-ninth pin of the central processing unit is connected to the connecting line between the tenth resistor R10 and the second thermistor RT2 connected in series.

10. The fuel generator safety monitoring method according to claim 3, characterized in that: The data storage circuit includes a memory, an eighteenth capacitor C18, and a nineteenth capacitor C19. The model of the memory is W25Q128. The eighteenth capacitor C18 and the nineteenth capacitor C19 are connected in parallel. One end of the eighteenth capacitor C18 and the nineteenth capacitor C19 connected in parallel is connected to the eighth pin of the memory, and the other end of the eighteenth capacitor C18 and the nineteenth capacitor C19 connected in parallel is grounded. The first pin, the second pin, the fifth pin, and the sixth pin of the memory are respectively connected to the fifth pin, the sixth pin, the seventh pin, and the eighth pin of the central processing unit.

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