CN111779588A - Unmanned aerial vehicle engine controller with remote diagnosis and alarm functions - Google Patents

Unmanned aerial vehicle engine controller with remote diagnosis and alarm functions Download PDF

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Publication number
CN111779588A
CN111779588A CN202010776655.3A CN202010776655A CN111779588A CN 111779588 A CN111779588 A CN 111779588A CN 202010776655 A CN202010776655 A CN 202010776655A CN 111779588 A CN111779588 A CN 111779588A
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CN
China
Prior art keywords
circuit
diagnosis
microcontroller
sensor
electrically connected
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Pending
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CN202010776655.3A
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Chinese (zh)
Inventor
闫方超
李尧才
杜汉宇
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Tianjin Bool Technology Co ltd
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Tianjin Bool Technology Co ltd
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Priority to CN202010776655.3A priority Critical patent/CN111779588A/en
Publication of CN111779588A publication Critical patent/CN111779588A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/3082—Control of electrical fuel pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
    • F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing
    • F02P5/152—Digital data processing dependent on pinking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/224—Diagnosis of the fuel system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/228—Warning displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/021—Engine temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0404—Throttle position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0406—Intake manifold pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature

Abstract

The invention belongs to the technical field of engine controllers, and particularly relates to an unmanned aerial vehicle engine controller with remote diagnosis and alarm functions, which comprises a cylinder head temperature sensor, an air inlet temperature sensor, a temperature acquisition and diagnosis circuit, a microcontroller, an atmospheric pressure sensor, an air inlet manifold pressure sensor, a pressure acquisition and diagnosis circuit, a throttle opening sensor, a throttle opening acquisition and diagnosis circuit, a crankshaft position sensor, a crankshaft position signal acquisition and diagnosis circuit, a steering engine PWM input, a steering engine input signal acquisition and diagnosis circuit, an ignition switch input, an ignition signal acquisition and diagnosis circuit, a communication circuit, an aircraft controller, a 4G module and a remote monitor. The engine controller can control fuel injection and ignition of the engine according to the working conditions of the engine collected by various sensors, and can also perform self-diagnosis on a sensor collecting part and a fuel injection part.

Description

Unmanned aerial vehicle engine controller with remote diagnosis and alarm functions
Technical Field
The invention belongs to the technical field of engine controllers, and particularly relates to an unmanned aerial vehicle engine controller with remote diagnosis and alarm functions.
Background
Unmanned aerial vehicle is as an increasingly complete lift-off platform, not only upgrades from support type equipment in the military field to the front of war, also becomes the bright new star of seeing in order to scrape all over the world in civilian field, and all countries are with unmanned aerial vehicle as one of the key points of development. The small and medium-sized unmanned aerial vehicle mostly adopts a low-power piston engine as a power system, and compared with other aero-engines, the piston engine has the advantages of small volume, light weight, high power per liter, simple structure, relatively low cost, mature part manufacturing and supply system, good fuel economy and the like. The type and the number of low-altitude low-speed man-machines taking a small piston engine as power are dominant in the unmanned aerial vehicle. The traditional aviation piston engine adopts a carburetor type fuel oil system, and negative pressure is generated when air flows through an oil pipe of a carburetor, so that fuel oil is sucked to a throat pipe and is mixed with air flow mist to form combustible mixed gas. However, the conventional aviation piston engine has some disadvantages, mainly because the fuel and air cannot be accurately metered, and the fuel amount cannot be controlled according to different working conditions and environments, a proper air-fuel ratio is difficult to obtain, namely, due to the working principle of a carburetor, the air-fuel ratio of the engine under various working conditions cannot be accurately controlled, so that the dynamic performance, stability and fuel economy of the engine are influenced to a certain extent. And along with the development of intelligent technology, intelligent control and diagnosis can not be realized to traditional carburetor, and the technique is relatively laggard, has restricted light unmanned aerial vehicle engine's development.
Disclosure of Invention
The invention mainly aims to solve the problems in the prior art and provide the unmanned aerial vehicle engine controller with the functions of remote diagnosis and alarm.
The technical problem solved by the invention is realized by adopting the following technical scheme: an unmanned aerial vehicle engine controller with remote diagnosis and alarm functions comprises a cylinder head temperature sensor, an air inlet temperature sensor, a temperature acquisition and diagnosis circuit, a microcontroller, an atmospheric pressure sensor, an air inlet manifold pressure sensor, a pressure acquisition and diagnosis circuit, a throttle opening sensor, a throttle opening acquisition and diagnosis circuit, a crankshaft position sensor, a crankshaft position signal acquisition and diagnosis circuit, a steering engine PWM input, a steering engine input signal acquisition and diagnosis circuit, an ignition switch input, an ignition signal acquisition and diagnosis circuit, a communication circuit, an airplane controller, a 4G module, a remote monitor, a steering engine driving circuit, a steering engine, a driving circuit, a relay circuit, an oil pump, an igniter, a fault lamp, a fuel injector and a fuel injection diagnosis circuit, wherein the cylinder head temperature sensor and the air inlet temperature sensor are electrically connected with the diagnosis circuit through the temperature acquisition and diagnosis circuit, the atmospheric pressure sensor and the intake manifold pressure sensor are electrically connected with a microcontroller through a pressure acquisition and diagnosis circuit, the throttle opening sensor is electrically connected with the microcontroller through a throttle opening acquisition and diagnosis circuit, the crankshaft position sensor is electrically connected with the microcontroller through a crankshaft position signal acquisition and diagnosis circuit, the steering engine PWM input is electrically connected with the microcontroller through a steering engine input signal acquisition and diagnosis circuit, the ignition switch input is electrically connected with the microcontroller through an ignition signal acquisition and diagnosis circuit, the microcontroller is electrically connected with an airplane controller through a communication circuit, the microcontroller is wirelessly connected with a remote monitor through a 4G module, the microcontroller is electrically connected with a steering engine through a steering engine driving circuit, the microcontroller is electrically connected with a driving circuit, and the driving circuit is electrically connected with an oil pump through a relay circuit, the driving circuit is respectively and electrically connected with the igniter, the fault lamp and the fuel injector, and the fuel injector is electrically connected with the microcontroller through the fuel injection diagnosis circuit.
Further, microcontroller electricity respectively connects oxygen sensor and knock sensor, drive circuit passes through MOSFET circuit electricity and connects the HEGO heater.
Further, the microcontroller is electrically connected with a power module, and the power module adopts a power chip with the model number of TPS 51120.
Further, the communication circuit is a CAN communication circuit or an RS485 communication circuit.
Further, the cylinder head temperature sensor and the air inlet temperature sensor are PT100 temperature sensors.
Further, the type of the microcontroller is MC9S12P128MLH, the driving circuit adopts a driving chip with the type of MC33814, and the 4G module selects a SIM7600 module or an EC20 module.
The invention has the beneficial effects that:
1. according to various sensor collection engine operating modes, microprocessor drives oil pump switch, some firearm ignition, fuel injector injection respectively through drive circuit, carries out accurate control to the fuel injection and the ignition of engine, has improved unmanned aerial vehicle engine adaptability, stability and fuel economy.
2. The temperature acquisition and diagnosis circuit, the pressure acquisition and diagnosis circuit, the throttle opening acquisition and diagnosis circuit and the crankshaft position signal acquisition and diagnosis circuit can perform self-diagnosis on the state of an input sensor, the steering engine input signal acquisition and diagnosis circuit, the ignition signal acquisition and diagnosis circuit and the fuel injection diagnosis circuit output oil injection control state, and can perform fault alarm and remote alarm when a fault is judged, so that the stability, the expansibility and the safety of an unmanned aerial vehicle engine are improved.
Drawings
Fig. 1 is a schematic diagram of an engine controller of an unmanned aerial vehicle with remote diagnosis and alarm functions according to the present invention.
Fig. 2 is a circuit diagram of the temperature acquisition and diagnostic circuit of the present invention.
Fig. 3 is a circuit diagram of the pressure acquisition and diagnostic circuitry of the present invention.
FIG. 4 is a circuit diagram of the crankshaft position signal acquisition and diagnostic circuit of the present invention.
Fig. 5 is a circuit diagram of a fuel injection diagnostic circuit of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-5, the present invention provides an unmanned aerial vehicle engine controller with remote diagnosis and alarm functions, which comprises a cylinder head temperature sensor, an intake air temperature sensor, a temperature acquisition and diagnosis circuit, a microcontroller, an atmospheric pressure sensor, an intake manifold pressure sensor, a pressure acquisition and diagnosis circuit, a throttle opening sensor, a throttle opening acquisition and diagnosis circuit, a crankshaft position sensor, a crankshaft position signal acquisition and diagnosis circuit, a steering engine PWM input, a steering engine input signal acquisition and diagnosis circuit, an ignition switch input, an ignition signal acquisition and diagnosis circuit, a communication circuit, an aircraft controller, a 4G module, a remote monitor, a steering engine driving circuit, a steering engine, a driving circuit, a relay circuit, an oil pump, an igniter, a fault lamp, a fuel injector and a fuel injection diagnosis circuit, wherein the cylinder head temperature sensor and the intake air temperature sensor are electrically connected with the microcontroller through the temperature acquisition and diagnosis circuit, the atmospheric pressure sensor and the intake manifold pressure sensor are electrically connected with a microcontroller through a pressure acquisition and diagnosis circuit, the throttle opening sensor is electrically connected with the microcontroller through a throttle opening acquisition and diagnosis circuit, the crankshaft position sensor is electrically connected with the microcontroller through a crankshaft position signal acquisition and diagnosis circuit, the steering engine PWM input is electrically connected with the microcontroller through a steering engine input signal acquisition and diagnosis circuit, the ignition switch input is electrically connected with the microcontroller through an ignition signal acquisition and diagnosis circuit, the microcontroller is electrically connected with an airplane controller through a communication circuit, the microcontroller is wirelessly connected with a remote monitor through a 4G module, the microcontroller is electrically connected with a steering engine through a steering engine driving circuit, the microcontroller is electrically connected with a driving circuit, the driving circuit is electrically connected with an oil pump through a relay circuit, and the driving circuit is respectively and electrically connected with, the fuel injector is electrically connected to the microcontroller through a fuel injection diagnostic circuit.
The microcontroller is electrically connected with the oxygen sensor and the knock sensor respectively, and the driving circuit is electrically connected with the HEGO heater through the MOSFET circuit.
The microcontroller is electrically connected with a power supply module, and the power supply module adopts a power supply chip with the model number of TPS 51120. The power supply module mainly has the function of converting an input power supply into various power supplies required by the controller, mainly comprises 3.3V,5V,6V, 5V and the like, and can supply power to circuits of each part of the controller.
The communication circuit is a CAN communication circuit or an RS485 communication circuit. The CAN communication circuit or the RS485 communication circuit is used for communicating with the aircraft controller or debugging and communicating with the PC.
The cylinder head temperature sensor and the air inlet temperature sensor are PT100 temperature sensors.
The model of the microcontroller is MC9S12P128MLH, the driving circuit adopts a driving chip with the model of MC33814, and the 4G module adopts a SIM7600 module or an EC20 module.
Examples
The working process of the invention is as follows: the microcontroller communicates with the aircraft controller or with the PC debug via the communication circuit. And the microcontroller uploads the engine information through the 4G module to carry out remote monitoring and diagnosis. The microcontroller drives the steering engine to start through the steering engine driving circuit. The microcontroller respectively collects a crankshaft position signal, a steering engine input signal and an ignition signal through a crankshaft position sensor, a steering engine PWM input and an ignition switch input, in the collection process of the microcontroller, the crankshaft position signal collection and diagnosis circuit, the steering engine input signal collection and diagnosis circuit and the ignition signal collection and diagnosis circuit can respectively carry out self diagnosis, fault alarm and remote alarm can be carried out when abnormal diagnosis is carried out, and the microcontroller controls oil injection and ignition output according to the collected three signals of the crankshaft position signal, the steering engine input signal and the ignition signal. The microcontroller drives an oil pump switch through a relay circuit by a driving circuit, the driving circuit also drives a fuel injector switch and an igniter switch respectively, and the microcontroller realizes control of oil injection and ignition output by controlling the oil pump switch, the fuel injector switch and the igniter switch. The microcontroller respectively collects temperature signals, pressure signals and throttle signals through a cylinder head temperature sensor, an air inlet temperature sensor, an atmospheric pressure sensor, an air inlet manifold pressure sensor and a throttle opening sensor, in the collection process of the microcontroller, the temperature collection and diagnosis circuit, the pressure collection and diagnosis circuit and the throttle opening collection and diagnosis circuit can respectively carry out self diagnosis, fault alarm and remote alarm can be carried out when the diagnosis is abnormal, and the microcontroller controls oil injection and ignition correction according to the collected three signals of the temperature signals, the pressure signals and the throttle signals. The microcontroller controls the oil injection and ignition correction by controlling an oil pump switch, a fuel injector switch and an igniter switch. The microcontroller collects the oxygen potential in the engine exhaust pipe through the oxygen sensor, monitors and controls the air-fuel ratio of the engine, and drives the HEGO heater to heat the oxygen sensor through the drive circuit and the MOSFET circuit. The microcontroller detects the jitter degree of the engine through the knock sensor, and when the engine knocks, the microcontroller drives the igniter to adjust the ignition advance angle through the driving circuit. The microcontroller carries out self-diagnosis on the output oil injection control state through the fuel injection diagnosis circuit, and can carry out fault alarm and remote alarm when abnormal diagnosis is carried out.
In the temperature acquisition and diagnosis circuit shown in fig. 2, a PT100 sensor with high reliability and high temperature range is adopted as the temperature sensor, a bridge is formed by the R215, R219, R220 and the PT100 sensor, a differential amplifier circuit is formed by a U60A amplifier, and then the differential amplifier circuit enters an analog input IO port of the microcontroller through a filter and protection circuit. The U60 amplifier may be OPA2348AID, LM293, or other precision operational amplifier. The 12-bit AD sampling range of the single chip microcomputer is 0-4096, and the upper and lower limit threshold values collected by a normal sensor can be determined by adjusting the resistance values of 3 resistors of the bridge. If the resistance is adjusted, the lower threshold of the normal temperature range is 200, and the upper threshold is 3500, after the calculation of the average filtering algorithm of the AD sampling, if the acquired AD is lower than the lower threshold 200, the sensor is determined to be short-circuited, and if the acquired AD exceeds the upper threshold 3500, the sensor is determined to be open-circuited. After the sensor is judged to be abnormal, abnormal alarming can be carried out through the fault lamp or fault information can be transmitted to the remote monitor through the 4G module in a wireless transmission mode.
In the throttle opening acquisition and diagnosis circuit, the throttle opening acquisition is similar to the temperature acquisition, the different output resistance values of the throttle opening are different, after the acquisition circuit, when AD sampling is carried out, if the AD sampling exceeds a lower limit threshold value, the throttle signal is judged to be short-circuited or connected to be short-circuited, and if the AD sampling exceeds an upper limit threshold value, the throttle signal is judged to be open-circuited or connected to be open-circuited. After the sensor is judged to be abnormal, abnormal alarming can be carried out through the fault lamp or fault information can be transmitted to the remote monitor through the 4G module in a wireless transmission mode.
The pressure acquisition and diagnostic circuit shown in fig. 3, U59 is a pressure sensor, optionally an MPXAZ6115AP or other analog output pressure sensor, followed by a voltage follower via U62A op-amp, and then via a protection circuit and filter circuit into the input port of the microcontroller. Because the working range of the air pressure is definite, the fault alarm and prompt can be carried out when the collected air pressure value which exceeds the normal range.
The crankshaft position signal acquisition and diagnosis circuit shown in fig. 4 is an important signal input source of an engine electronic fuel injection control system of a crankshaft position signal (a rotating speed signal), and timely alarming is required to be performed when the crankshaft position signal is abnormal. The crank shaft position signal adopts Hall pulse signals as input, the signals are input into the controller and enter an input port of the microcontroller through the hysteresis comparison circuit, the filter circuit and the protection circuit. Before the engine is started, if the rotating propeller cannot acquire a crankshaft signal, the engine cannot be judged to be started, and oil injection ignition cannot be performed, so that the abnormality is easy to find and judge. If the engine runs, the control always collects the crankshaft position signal, the current engine speed is calculated every 200-300 milliseconds, and if the change rate of the engine speed of 2 adjacent times exceeds the range (generally 25 percent), the crankshaft signal is judged to be abnormal. In order to prevent false alarm, when an abnormal rotating speed value appears, if the abnormal rotating speed value is recovered after the next rotating speed calculation, the abnormal rotating speed value is not judged to be abnormal, and if the abnormal rotating speed value exists all the time, fault alarm and remote alarm are carried out.
In the steering engine input signal acquisition and diagnosis circuit, the steering engine PWM input signal can monitor the current steering engine opening degree, can also receive the steering engine signal of aircraft controller output, and then via the change of engine controller control steering engine. The steering engine input signal acquisition and diagnosis circuit and the crankshaft position signal acquisition and diagnosis circuit are consistent, and if the microcontroller acquires PWM signals, if the frequency changes or no signal is output, fault alarm prompt can be carried out, and whether the problem exists in the steering engine or the connecting circuit between the steering engine and the flight control needs to be checked.
The ignition signal acquisition and diagnosis circuit can also monitor the ignition signal through the engine controller, and similar to the crankshaft signal, when the change rate of the adjacent ignition period is abnormal or no ignition signal is output, the engine controller carries out fault alarm prompt and remote alarm.
In the fuel injection diagnostic circuit of fig. 5, the microcontroller controls the negative terminal of the fuel injector coil via the driver circuit, which injects the injector when the negative terminal is turned on to ground. The voltage signal output by the driving circuit is divided by R230 and R231 and then converted into the level which can be input by the microcontroller, collected and isolated by a voltage follower consisting of U63A and a peripheral circuit, and then input into an analog input pin of the microcontroller through a protection circuit and a filter circuit. The microcontroller diagnoses the injection circuit by monitoring the voltage at the negative terminal control point of the fuel injector coil. If the external injector is normal, the microcontroller can acquire normal high-low voltage changes. If the injector breaks open or the connecting line is short circuited, the voltage sensed by the microcontroller is always low. The microcontroller judges whether the injection circuit is abnormal or not through the acquired voltage, and if the injection circuit is abnormal, a fault alarm or a remote alarm is carried out.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. The utility model provides an unmanned aerial vehicle engine controller who possesses remote diagnosis and alarming function which characterized in that: the device comprises a cylinder head temperature sensor, an air inlet temperature sensor, a temperature acquisition and diagnosis circuit, a microcontroller, an atmospheric pressure sensor, an air inlet manifold pressure sensor, a pressure acquisition and diagnosis circuit, a throttle opening sensor, a throttle opening acquisition and diagnosis circuit, a crankshaft position sensor, a crankshaft position signal acquisition and diagnosis circuit, a steering engine PWM input, a steering engine input signal acquisition and diagnosis circuit, an ignition switch input, an ignition signal acquisition and diagnosis circuit, a communication circuit, an airplane controller, a 4G module, a remote monitor, a steering engine driving circuit, a steering engine, a driving circuit, a relay circuit, an oil pump, an igniter, a fault lamp, a fuel injector and a fuel injection diagnosis circuit, wherein the cylinder head temperature sensor and the air inlet temperature sensor are electrically connected with the microcontroller through the temperature acquisition and diagnosis circuit, and the atmospheric pressure sensor and the air inlet manifold pressure sensor are electrically connected with the diagnosis circuit through the pressure acquisition and diagnosis circuit, the throttle opening sensor is electrically connected with the microcontroller through a throttle opening acquisition and diagnosis circuit, the crankshaft position sensor is electrically connected with the microcontroller through a crankshaft position signal acquisition and diagnosis circuit, the steering engine PWM input is electrically connected with the microcontroller through the steering engine input signal acquisition and diagnosis circuit, the input of the ignition switch is electrically connected with the microcontroller through an ignition signal acquisition and diagnosis circuit, the microcontroller is electrically connected with the airplane controller through a communication circuit, the microcontroller is wirelessly connected with a remote monitor through a 4G module, the microcontroller is electrically connected with a steering engine through a steering engine driving circuit, the microcontroller is electrically connected with a driving circuit, the driving circuit is electrically connected with the oil pump through a relay circuit, the driving circuit is respectively and electrically connected with the igniter, the fault lamp and the fuel injector, and the fuel injector is electrically connected with the microcontroller through the fuel injection diagnosis circuit.
2. The engine controller of unmanned aerial vehicle with remote diagnosis and alarm functions of claim 1, wherein: the microcontroller is connected with the oxygen sensor and the knock sensor electrically respectively, and the drive circuit is connected with the HEGO heater electrically through the MOSFET circuit.
3. The engine controller of unmanned aerial vehicle with remote diagnosis and alarm functions of claim 1, wherein: the microcontroller is electrically connected with a power supply module, and the power supply module adopts a power supply chip with the model number of TPS 51120.
4. The engine controller of unmanned aerial vehicle with remote diagnosis and alarm functions of claim 1, wherein: the communication circuit is a CAN communication circuit or an RS485 communication circuit.
5. The engine controller of unmanned aerial vehicle with remote diagnosis and alarm functions of claim 1, wherein: the cylinder head temperature sensor and the air inlet temperature sensor are PT100 temperature sensors.
6. The engine controller of unmanned aerial vehicle with remote diagnosis and alarm functions of claim 1, wherein: the type of the microcontroller is MC9S12P128MLH, the driving circuit adopts a driving chip with the type of MC33814, and the 4G module adopts a SIM7600 module or an EC20 module.
CN202010776655.3A 2020-08-05 2020-08-05 Unmanned aerial vehicle engine controller with remote diagnosis and alarm functions Pending CN111779588A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112863006A (en) * 2021-02-24 2021-05-28 联合汽车电子有限公司 Vehicle detection method, device, equipment, vehicle and storage medium
CN113107674A (en) * 2021-04-17 2021-07-13 西北工业大学 Small-size piston carburetor engine real-time data monitoring and adjustment system
CN113738526A (en) * 2021-09-18 2021-12-03 北京信息科技大学 Fault diagnosis system for abnormal oil injection of small aviation piston engine
CN114509976A (en) * 2022-02-17 2022-05-17 上海东古智能科技有限公司 Oil moves ECU controller that directly drives unmanned aerial vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112863006A (en) * 2021-02-24 2021-05-28 联合汽车电子有限公司 Vehicle detection method, device, equipment, vehicle and storage medium
CN112863006B (en) * 2021-02-24 2023-01-06 联合汽车电子有限公司 Vehicle detection method, device, equipment, vehicle and storage medium
CN113107674A (en) * 2021-04-17 2021-07-13 西北工业大学 Small-size piston carburetor engine real-time data monitoring and adjustment system
CN113738526A (en) * 2021-09-18 2021-12-03 北京信息科技大学 Fault diagnosis system for abnormal oil injection of small aviation piston engine
CN114509976A (en) * 2022-02-17 2022-05-17 上海东古智能科技有限公司 Oil moves ECU controller that directly drives unmanned aerial vehicle

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