CN216144390U - Unmanned aerial vehicle irregular oil tank fuel volume measuring and displaying system - Google Patents
Unmanned aerial vehicle irregular oil tank fuel volume measuring and displaying system Download PDFInfo
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- CN216144390U CN216144390U CN202121995956.1U CN202121995956U CN216144390U CN 216144390 U CN216144390 U CN 216144390U CN 202121995956 U CN202121995956 U CN 202121995956U CN 216144390 U CN216144390 U CN 216144390U
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Abstract
The utility model relates to an unmanned aerial vehicle irregular oil tank oil mass volume measuring and displaying system, which comprises: the system comprises an oil volume measuring and displaying circuit, a wireless module and an oil volume liquid level sensor, wherein the oil volume measuring and displaying circuit is arranged on the unmanned aerial vehicle; the oil volume measuring and displaying circuit comprises a processor, a serial port circuit and an I2C communication interface circuit, charactron drive circuit, oil mass scale display lamp circuit, voltage conversion circuit, the treater passes through serial circuits connection oil mass level sensor, wireless module, I2C communication interface circuit passes through charactron drive circuitConnecting an oil quantity scale display lamp circuit; the voltage conversion circuit is respectively connected with the processor, the serial port circuit and the I2And the C communication interface circuit, the nixie tube driving circuit and the oil volume scale display lamp circuit provide power supplies. The utility model can measure the volume of the oil mass, provides reliable power for an unmanned aerial vehicle operation task planner and avoids the repeated work of repeated take-off and landing caused by the fact that the residual quantity of the oil mass cannot be accurately measured.
Description
Technical Field
The utility model belongs to the technical field of unmanned aerial vehicle oil mass measurement, and particularly relates to an unmanned aerial vehicle irregular oil mass volume measurement and display system.
Background
The endurance of the unmanned aerial vehicle is an important technical index for measuring the quality of the unmanned aerial vehicle system, and most unmanned aerial vehicles adopt a fuel power system as the most main power mode in order to achieve the purpose of overlength voyage. And carry out actual flight test to unmanned aerial vehicle's duration at unmanned aerial vehicle design initial stage, an important parameter that needs to pay close attention to in the flight test is the remaining volume of test fuel. Most of the measuring methods for measuring the volume of the oil mass on the market adopt a resistance type liquid level sensor to measure the liquid level of the oil mass, and only the liquid level of the oil mass reduction is known, and the actual volume of the oil mass is not known. Still there is a problem that the design of unmanned aerial vehicle appearance considers that the general oil tank of pneumatic overall arrangement is not the regular oil tank of square, but the special-shaped oil tank structure of design according to unmanned aerial vehicle shell covering, so hardly through traditional circuit structure and resistance type sensor accurate measurement actual oil mass volume.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the utility model aims to provide a system for measuring and displaying the volume of the oil mass of an irregular oil tank of an unmanned aerial vehicle, which can measure and display the oil mass of any irregular oil tank; the system can communicate with any flight control in the market; not only can show the oil mass on unmanned aerial vehicle ground satellite station, also can show remaining oil mass percentage simultaneously and make things convenient for the routine maintenance of ground service maintainer on the organism.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides an irregular oil tank oil mass volume of unmanned aerial vehicle measures and display system, includes: the system comprises an oil volume measuring and displaying circuit, a wireless module and an oil volume liquid level sensor, wherein the oil volume measuring and displaying circuit is arranged on the unmanned aerial vehicle; the oil volume measuring and displaying circuit comprises a processor, a serial port circuit and an I2C communication interface circuit, charactron drive circuit, oil mass scale display lamp circuit, voltage conversion circuit, the treater passes through serial circuits connection oil mass level sensor, wireless module, I2The communication interface circuit is connected with an oil volume scale display lamp circuit through a nixie tube driving circuit; the voltage conversion circuit is respectively connected with the processor, the serial port circuit and the I2And the C communication interface circuit, the nixie tube driving circuit and the oil volume scale display lamp circuit provide power supplies.
The oil mass and liquid level sensor adopts a voltage type liquid level sensor.
The voltage conversion circuit includes: an input end VIN of the power chip U2 is connected with a +5V power supply, the input end VIN is grounded after being connected in parallel through a capacitor C16 and a capacitor C17, an output end VO outputs a 3.3V power supply, and the output end VO is grounded after being connected in parallel through a capacitor C18 and a capacitor C19.
The voltage conversion circuit is also connected with a power indicator lamp circuit: the input end VIN and the output end VO are grounded through diodes D13 and D14, respectively.
The serial port circuit is a serial port RS232-TTL conversion circuit, and comprises:
a capacitor C20 is connected between a pin C1+ and a pin C1-of the chip U3, a capacitor C21 is connected between a pin C2+ and a pin C2-, a pin VDD is grounded through a capacitor C22, a pin VCC is grounded through a capacitor C23, and the pin VCC is also connected with a 3.3V power supply;
the pin T1IN is connected with the processor, the pin T1OUT is connected with the COM terminal P2 of the RS232, the pin R1OUT is connected with the processor, the pin R1IN is connected with the COM terminal P2 of the RS232, and the terminal P2 is connected with the liquid level sensor;
pin T2IN connects the processor, and pin T2OUT connects COM terminal P3 of RS232, and pin R2OUT connects the processor, and pin R2IN connects COM terminal P3 of RS232, and terminal P3 connects the unmanned aerial vehicle state monitoring module.
Said I2The C communication interface circuit includes: two of the processors I2The pins SCL and SDA are grounded through two pull-up resistors R21 and R22 respectively, a terminal P4 is further connected, and a terminal P4 is connected with a nixie tube driving circuit.
The nixie tube driving circuit comprises:
8 paths of output LED signals of the nixie tube driving chip TM1650 are connected to a 4-bit 8-segment digital display chip 8SEG4 LED; terminal P6 is also connected to I2Terminal P4 of the C communication interface circuit.
The oil mass scale display lamp circuit includes:
the terminal P7 outputs 10 paths of signals OILLEDD0-OILLED9 which are respectively connected with the input pins of the LED10RYGB, and the output pins of the LED10RYGB of the diode module are respectively connected with a 3.3V power supply through oil volume scale display lamp load resistors R1-R10; the 10 groups of oil quantity scale display lamps form an engine body oil quantity display used for displaying the remaining percentage of oil quantity;
an output signal OIL-PB0 of an input end 13 pin of the terminal P7 is connected with an IO pin of the processor 101 chip, and an output signal OIL-PB1 of an output end 14 pin is connected with an IO pin of the processor 101 chip; a pin 12 is connected with a 3.3V power supply, and a pin 14 is connected with a 5V power supply; 11. the 15 pin is grounded.
The processor adopts an STM32F427 singlechip.
The processor is also communicated with the ground station upper computer through a wireless module arranged on the unmanned aerial vehicle.
The utility model has the advantages and beneficial effects that:
1. the oil quantity of an irregular oil tank of any unmanned aerial vehicle can be measured and displayed;
2. not only can show the oil mass on unmanned aerial vehicle ground satellite station, also can show remaining oil mass simultaneously and make things convenient for the routine maintenance of ground service maintainer on the organism.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment 1 of a fuel volume measuring and displaying system of a fuel tank according to the present invention;
FIG. 2 is a voltage conversion circuit and power indicator circuit of the present invention;
FIG. 3 is a serial circuit of the present invention;
FIG. 4 shows a schematic view of the present invention I2C, a communication interface circuit;
FIG. 5 is a nixie tube driving circuit according to the present invention;
FIG. 6 is a circuit of the fuel gauge display lamp of the present invention;
FIG. 7 is a schematic view of an embodiment 2 of the volume measurement system of the irregular fuel tank of the unmanned aerial vehicle of the present invention;
FIG. 8 is a schematic diagram of an attitude fuel volume measurement compensation method of the irregular fuel tank volume measurement system of the unmanned aerial vehicle of the present invention;
FIG. 9 is a curve for accurately measuring the volume of an oil tank of an XY200 model unmanned helicopter;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the system of embodiment 1 of the present invention includes: the system comprises an oil volume measuring and displaying circuit 1, a wireless module 3 and an oil volume liquid level sensor 2, wherein the oil volume measuring and displaying circuit 1 is arranged on the unmanned aerial vehicle; the oil volume measuring and displaying circuit 1 comprises a processor 101, a serial port circuit 102 and an I2A C communication interface circuit 103, a nixie tube drive circuit 104, an oil volume scale display lamp circuit 105 and a voltage conversion circuit 106, wherein the processor 101 is connected with the oil volume liquid level sensor 2 and the wireless module 3 through a serial port circuit 102, and I2The C communication interface circuit 103 is connected with an oil volume scale display lamp circuit 105 through a nixie tube driving circuit 104; the voltage conversion circuit 106 is respectively connected with the processor 101, the serial port circuit 102 and the I2C communication interface circuit 103, nixie tube drive circuit 104 and oil mass scaleThe display lamp circuit 105 supplies power. The oil mass and liquid level sensor 2 adopts a voltage type liquid level sensor.
As shown in fig. 2, the power circuit supplies power to the whole hardware, the input voltage is 5V, the voltage is converted into 3.3V through the TLV1117-3.3 voltage conversion chip, and the power supply circuit supplies power to other chips with 3.3V, and two indicator lamps are additionally arranged on the power supply circuit, so that whether the 5V and 3.3V voltages work normally can be visually seen. The voltage conversion circuit 106 includes: an input end VIN of a power supply chip U2 (model TLV1117-3.3) is connected with a +5V power supply, the input end VIN is grounded after being connected in parallel with a capacitor C16 and a capacitor C17, an output end VO outputs a 3.3V power supply, and the output end VO is grounded after being connected in parallel with a capacitor C18 and a capacitor C19. The voltage conversion circuit 106 is also connected with a power indicator circuit 107: the input end VIN and the output end VO are grounded through diodes D13 and D14, respectively.
As shown in fig. 3, the TTL to RS232 and IIC interface circuits: the circuit mainly converts TTL serial port signals of the single chip microcomputer into RS232 levels, and the signals are communicated with serial ports of a state monitoring system and an oil quantity liquid level sensor. The serial port circuit 102 is a serial port RS232-TTL conversion circuit, and includes: a capacitor C20 is connected between a pin C1+ and a pin C1-of a chip U3 (model MAX3232EUE), a capacitor C21 is connected between a pin C2+ and a pin C2-, a pin VDD is grounded through the capacitor C22, a pin VCC is grounded through the capacitor C23, and the pin VCC is also connected with a 3.3V power supply. The pin T1IN is connected to the processor 101, the pin T1OUT is connected to the COM terminal P2 of the RS232, the pin R1OUT is connected to the processor 101, the pin R1IN is connected to the COM terminal P2 of the RS232, and the terminal P2 is connected to the liquid level sensor 2. The pin T2IN is connected with the processor 101, the pin T2OUT is connected with the COM terminal P3 of the RS232, the pin R2OUT is connected with the processor 101, the pin R2IN is connected with the COM terminal P3 of the RS232, and the terminal P3 is connected with the unmanned aerial vehicle state monitoring module 3.
As shown in FIG. 4, I2The C interface circuit is mainly communicated with a TM1650 nixie tube display chip to realize digital display of the oil quantity. I is2The C communication interface circuit 103 includes: two I of the processor 1012The pins SCL and SDA are grounded through two pull-up resistors R21 and R22, respectively, and further connected to a terminal P4, and the terminal P4 is connected to the nixie tube driving circuit 104.
As shown in fig. 5, the oil quantity number and scale display circuit:the circuit mainly comprises two parts, wherein one part is a digital tube display driving circuit based on TM1650 for displaying numbers, and the other part is an oil volume scale display circuit. The nixie tube driving circuit 104 includes: pins 2 and 3 of the terminal P6 are connected to SCL and SDA pins of the charactron driver chip TM1650, respectively, pins 2 and 3 of the terminal P6 are connected to a 5V power supply through pull-up resistors R23 and R24, respectively, the 5V power supply is grounded after being connected in parallel through capacitors C27 and C28, and is grounded through capacitors C25 and R26, respectively. 8 paths of output LED signals of the nixie tube driving chip TM1650 are connected to an 8SEG4LED (4-bit 8-segment digital display module) chip; terminal P6 is also connected to I2Terminal P4 of C communication interface circuit 103.
As shown in fig. 6, the oil amount scale display circuit: the oil volume scale display is to control the IO pin of the STM32F427 chip according to the oil volume percentage value calculated by the controller, so that the oil volume scale display function of 10 divisions is realized. The oil volume scale display lamp circuit 105 includes: the terminal P7 outputs 10 paths of signals OILLEDD0-OILLED9 which are respectively connected with input pins of an LED10RYGB (integrated diode module), and output pins of the LED10RYGB are respectively connected with a 3.3V power supply through load resistors R1-R10 of an oil volume scale display lamp; and the 10 groups of oil quantity scale display lamps form an engine body oil quantity display for displaying the remaining percentage of the oil quantity. An output signal OIL-PB0 of an input end 13 pin of the terminal P7 is connected with an IO pin of the processor 101 chip, and an output signal OIL-PB1 of an output end 14 pin is connected with an IO pin of the processor 101 chip; a pin 12 is connected with a 3.3V power supply, and a pin 14 is connected with a 5V power supply; 11. the 15 pin is grounded.
The processor 101 adopts an STM32F427 single-chip microcomputer. The processor 101 is also in communication with the ground station upper computer via the wireless module 3 provided on the drone. Minimum system circuit of STM32F427 singlechip: the circuit mainly comprises an STM32F427 chip and peripheral circuits such as a crystal oscillator, a reset and the like to form a minimum system circuit of a singlechip. The circuit is a main chip of the oil quantity measuring controller, and all calculation, communication and display programs are realized by the chip. The minimum system of the single chip microcomputer is communicated with the oil quantity liquid level sensor through serial port communication and state monitoring, and is communicated with the oil quantity digital and scale display circuit through IIC communication, wherein oil quantity scale display is achieved through IO pin operation control oil quantity scale display.
As shown in fig. 7, the irregular fuel tank volume measuring system of the unmanned aerial vehicle according to another embodiment 2 provided by the utility model not only includes the irregular fuel tank volume measuring system of embodiment 1: locate oil mass volume measurement and display circuit 1, wireless module 3 on the unmanned aerial vehicle, locate the oil mass level sensor 2in the unmanned aerial vehicle oil tank, still include unmanned aerial vehicle flight control system 4, ground station host computer 5. The ground station upper computer 5 sends an off-line oil tank identification model to the processor 101 of the oil volume measurement and display circuit 1 through the unmanned aerial vehicle flight control system 4 and the wireless module 3, acquires unmanned aerial vehicle attitude data from the unmanned aerial vehicle flight control system 4 and sends the data to the processor 101 through the wireless module 3, and the processor 101 measures and compensates real-time oil volume liquid level.
Further, the processor 101 adopts the STM32F427 chip as the main controller, and the machine body oil quantity display is composed of 10 sections of digital tubes, namely, the LED lamp which can display numerical values and can also display percentage scale values and is in the shape like the battery power shape.
Furthermore, the processor 101 and the engine body oil quantity display are fixedly connected by a double-layer PCB, the lower PCB is the oil quantity volume calculation processor 101, the upper PCB is the engine body oil quantity display, the circuit board is circular in size and 46mm in diameter, and most fuel gauge shells on the market can be installed in a butt joint mode; the oil quantity calculation processor 101 takes the unmanned aerial vehicle attitude data input, the off-line oil tank input model and the liquid level data of the oil quantity liquid level sensor as system input to perform accurate oil quantity volume calculation, and sends the calculation results to the engine body oil quantity display and the ground station upper computer respectively to perform real-time oil quantity volume display in a volume (unit: L) or percentage mode (%).
Further, oil mass sensor 2 is for linking firmly the voltage type level sensor of installation with the unmanned aerial vehicle oil tank, measures the liquid level of arbitrary rule or irregular oil tank to send data for oil mass volume calculation controller 1.
The working principle of the processor measurement of the irregular oil tank volume measurement system of the unmanned aerial vehicle mainly comprises three steps, firstly, attitude angle error calibration is carried out on an oil tank liquid level sensor, and oil level measurement error compensation is carried out according to the attitude angle of the unmanned aerial vehicle after the unmanned aerial vehicle takes off; then, performing off-line calculation model identification on the oil tank; inputting the obtained off-line identification model into an oil volume calculation controller; and finally, setting the real-time volume of the oil tank in the calculation controller as the sum of the oil quantity V of the oil tank and the liquid level compensation quantity of the oil tank calculated according to the identification model. Therefore, the system for measuring the volume of the irregular oil tank of the unmanned aerial vehicle can accurately measure and display the volume of the oil of the irregular oil tank.
1. Oil tank level sensor carries out attitude angle error calibration
As shown in fig. 8, in the flight process of a general unmanned aerial vehicle, the pitch angle changes within a range of 30 degrees, and the roll angle changes within a range of 10 degrees, so that the attitude angle dynamic data acquisition is performed on the oil quantity liquid level sensor according to the angle range under each pitch angle and roll angle, and the acquired attitude angle error data is used as the real-time liquid level measurement attitude angle compensation for the subsequent oil quantity volume calculation.
2. Model for offline calculation and identification of oil tank
After the attitude compensation data of the sensor is calibrated, the oil tank is subjected to offline model identification, an installed oil volume measurement system is used for collecting data, and the volume model identification of the irregular oil tank of the XY200 unmanned aerial vehicle is carried out on MATLAB by using the measured and calibrated data. The specific identification data and identification model curves and formulas are as follows:
TABLE 1 calibration measurement of oil mass sensor
Using the data from table 1 above: the A/D sampling value x of the corresponding liquid level sensor when the oil tank oil mass V and the oil float change in position is subjected to MATLAB data fitting, and an accurate mathematical model comparing the oil output liquid level and the oil tank volume is identified, wherein the formula is as follows:
V(x)＝a1*sin(b1*x+c1)+a2*sin(b2*x+c2)+a3*sin(b3*x+c3)+a4*sin(b4*x+c4) (1)
wherein, the identification parameters are shown in table 2, and the identified model curve is shown in fig. 9;
TABLE 2 oil tank volume model identification parameters
| a1＝83.29 | a2＝133.2 | a3＝79.91 | a4＝0.4885 |
| b1＝0.04 | b2＝0.06497 | b3＝0.07407 | b4＝0.2256 |
| c1＝-0.8125 | c2＝1.312 | c3＝4.067 | c4＝2.042 |
3. The real-time volume of the oil tank is the oil quantity V of the oil tank and the volume compensation quantity of the oil tank calculated according to the identification model;
1) acquiring real-time attitude angle information and collecting corresponding A/D sampling values of the real-time liquid level sensor when the position of the oil float changes;
2) calculating the corresponding oil quantity V of the oil tank according to the A/D sampling value x of the real-time liquid level sensor and an oil quantity identification model of the oil tank;
3) summing the real-time attitude angle information and the real-time liquid level measurement attitude angle compensation for calculating the oil volume error of the part generated by the attitude angle error;
and summing the oil mass volume error serving as the oil tank volume compensation quantity with the oil mass V of the oil tank calculated according to the identification model to obtain the real-time volume of the compensated oil tank.
Therefore, the liquid level volume measuring and displaying system for the irregular oil tank, which is provided by the utility model, can measure and display the oil quantity of the irregular oil tank of any unmanned aerial vehicle; the system can communicate with any flight control in the market; the oil quantity can be displayed on the ground station of the unmanned aerial vehicle, and meanwhile, the residual oil quantity can be displayed on the machine body, so that the daily maintenance of ground maintenance personnel is facilitated;
the above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an irregular oil tank oil mass volume measurement of unmanned aerial vehicle and display system which characterized in that includes: the system comprises an oil volume measuring and displaying circuit (1) arranged on the unmanned aerial vehicle, a wireless module (3) and an oil volume liquid level sensor (2) arranged in an oil tank of the unmanned aerial vehicle; the oil volume measuring and displaying circuit (1) comprises a processor (101), a serial port circuit (102) and an I2C communication interface circuit (103), charactron drive circuit (104), oil mass scale display lamp circuit (105), voltage conversion circuit (106), treater (101) is through serial circuits (102) connection oil mass level sensor (2), wireless module (3), I2The C communication interface circuit (103) is connected with an oil volume scale display lamp circuit (105) through a nixie tube driving circuit (104); the voltage conversion circuit (106) is respectively connected with the processor (101), the serial port circuit (102) and the I2The C communication interface circuit (103), the nixie tube driving circuit (104) and the oil scale display lamp circuit (105) provide power supplies.
2. The system for measuring and displaying the volume of the oil mass in the irregular oil tank of the unmanned aerial vehicle as claimed in claim 1, wherein the oil mass liquid level sensor (2) is a voltage type liquid level sensor.
3. The system of claim 1, wherein the voltage conversion circuit (106) comprises: an input end VIN of the power chip U2 is connected with a +5V power supply, the input end VIN is grounded after being connected in parallel through a capacitor C16 and a capacitor C17, an output end VO outputs a 3.3V power supply, and the output end VO is grounded after being connected in parallel through a capacitor C18 and a capacitor C19.
4. The system for measuring and displaying the fuel volume of the irregular fuel tank of the unmanned aerial vehicle as claimed in claim 3, wherein the voltage conversion circuit (106) is further connected with a power indicator circuit (107): the input end VIN and the output end VO are grounded through diodes D13 and D14, respectively.
5. The system for measuring and displaying the volume of the oil in the irregular oil tank of the unmanned aerial vehicle as claimed in claim 1, wherein the serial port circuit (102) is a serial port RS232-TTL conversion circuit, and comprises:
a capacitor C20 is connected between a pin C1+ and a pin C1-of the chip U3, a capacitor C21 is connected between a pin C2+ and a pin C2-, a pin VDD is grounded through a capacitor C22, a pin VCC is grounded through a capacitor C23, and the pin VCC is also connected with a 3.3V power supply; the pin T1IN is connected with the processor (101), the pin T1OUT is connected with the COM terminal P2 of the RS232, the pin R1OUT is connected with the processor (101), the pin R1IN is connected with the COM terminal P2 of the RS232, and the terminal P2 is connected with the oil mass liquid level sensor (2); the processor (101) is connected to the pin T2IN, the COM terminal P3 of the RS232 is connected to the pin T2OUT, the processor (101) is connected to the pin R2OUT, the COM terminal P3 of the RS232 is connected to the pin R2IN, and the wireless module (3) is connected to the terminal P3.
6. The system of claim 1, wherein the I is a volume measurement and display system for measuring the volume of the fuel in the irregular fuel tank of the unmanned aerial vehicle2The C communication interface circuit (103) includes: two I of the processor (101)2The C pin SCL and the SDA respectively pass through two pull-up resistorsR21 and R22 are grounded, and are also connected with a terminal P4, and a terminal P4 is connected with a nixie tube driving circuit (104).
7. The system of claim 1, wherein the nixie tube driving circuit (104) comprises:
pins 2 and 3 of a terminal P6 are respectively connected with an SCL pin and an SDA pin of a nixie tube driving chip TM1650, pins 2 and 3 of a terminal P6 are respectively connected with a 5V power supply through pull-up resistors R23 and R24, the 5V power supply is grounded after being connected in parallel through capacitors C27 and C28, and is grounded through capacitors C25 and R26; 8 paths of output LED signals of the nixie tube driving chip TM1650 are connected to a 4-bit 8-segment digital display chip 8SEG4 LED; terminal P6 is also connected to I2And a terminal P4 of the C communication interface circuit (103).
8. The system for measuring and displaying the volume of the oil mass in the irregular oil tank of the unmanned aerial vehicle as claimed in claim 1, wherein the oil mass scale display lamp circuit (105) comprises:
the terminal P7 outputs 10 paths of signals OILLEDD0-OILLED9 which are respectively connected with the input pins of the LED10RYGB, and the output pins of the LED10RYGB of the diode module are respectively connected with a 3.3V power supply through oil volume scale display lamp load resistors R1-R10; the 10 groups of oil quantity scale display lamps form an oil quantity display of the engine body and are used for displaying the remaining percentage of oil quantity; an output signal OIL-PB0 of an input end 13 pin of the terminal P7 is connected with an IO pin of the processor 101 chip, and an output signal OIL-PB1 of an output end 14 pin is connected with an IO pin of the processor 101 chip; a pin 12 is connected with a 3.3V power supply, and a pin 14 is connected with a 5V power supply; 11. the 15 pin is grounded.
9. The system for measuring and displaying the volume of the fuel in the irregular fuel tank of the unmanned aerial vehicle as claimed in claim 1, wherein the processor (101) adopts an STM32F427 single chip microcomputer.
10. The system for measuring and displaying the fuel volume of the irregular fuel tank of the unmanned aerial vehicle as claimed in claim 1, wherein the processor (101) is further in communication with a ground station upper computer through a wireless module (3) arranged on the unmanned aerial vehicle.
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