CN210665974U - Battery power detection device of pure electric unmanned aerial vehicle - Google Patents
Battery power detection device of pure electric unmanned aerial vehicle Download PDFInfo
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Abstract
The utility model relates to a pure electric unmanned aerial vehicle, in particular to a battery power detection device of the pure electric unmanned aerial vehicle; the electric quantity detection device solves the technical problems that an existing pure electric unmanned aerial vehicle is inaccurate in measurement, prone to misjudgment, and prone to causing aerial falling of the unmanned aerial vehicle and causing damage to the unmanned aerial vehicle or injury to personnel. A battery electric quantity detection device of a pure electric unmanned aerial vehicle comprises a voltage processing circuit, a current processing circuit, an external power supply circuit, an electric quantity calculation unit and a display; the external power supply circuit provides a digital power supply VCC1 and an analog power supply VCC2 for the voltage processing circuit; the external power supply circuit provides a digital power supply VCC1 for the current processing circuit; the input ends of the voltage processing circuit and the current processing circuit are both connected with the anode of the battery to be detected, and the output ends of the voltage processing circuit and the current processing circuit are both connected with the inlet of the electric quantity calculating unit; the outlet of the electric quantity calculating unit is connected with the display.
Description
Technical Field
The utility model relates to a pure electric unmanned aerial vehicle, concretely relates to pure electric unmanned aerial vehicle's battery power detection device.
Background
In civilian unmanned aerial vehicle field, along with the innovation of microelectronics and the intelligent evolution of automatic control, the function of unmanned aerial vehicle aircraft is more powerful, and its fineness is also more and more high. The unmanned aerial vehicle utilizes the characteristics of low cost, high flexibility, remote control and the like, is gradually expanded into various industries, and various unmanned aerial vehicles for executing special tasks are also produced. In unmanned aerial vehicle machine and model aeroplane and model ship trade, most unmanned aerial vehicle adopt gasoline engine to do the power supply, but when actual task flight, because adverse environmental factor's such as humiture, oxygen content influence, the unexpected flame-out's in the air condition often can take place for gasoline engine, and is very unfavorable to unmanned aerial vehicle's flight safety, therefore pure electric unmanned aerial vehicle takes place to come up.
At present, the electric quantity detection device of the pure electric unmanned aerial vehicle in the civil field mostly depends on the voltage value of the battery to judge the residual electric quantity of the battery, so that an operator is required to have rich experience to know the state of the battery more skillfully. But unmanned aerial vehicle is when air flight, because the difference of parameters such as height, speed, angle of climbing, the discharge current of battery has fluctuation by a relatively large margin, relies on voltage to go to judge surplus electric quantity alone, can cause misjudgement by a relatively large margin, can appear often that the actual electric quantity of unmanned aerial vehicle is not enough but still use the condition to lead to unmanned aerial vehicle when air flight, lose electric power suddenly and drop from the sky, cause unmanned aerial vehicle to damage or personnel injured's condition.
SUMMERY OF THE UTILITY MODEL
In order to solve current pure electric unmanned aerial vehicle's electric quantity detection device and measure inaccurately, produce the erroneous judgement easily, lead to unmanned aerial vehicle to fall in the air, cause unmanned aerial vehicle to damage or personnel injured's technical problem, the utility model provides a pure electric unmanned aerial vehicle's battery electric quantity detection device.
The technical solution of the utility model is that: the utility model provides a pure electric unmanned aerial vehicle's battery power detection device, its special character lies in:
the device comprises a voltage processing circuit, a current processing circuit, an external power supply circuit, an electric quantity calculating unit and a display;
the external power supply circuit provides a digital power supply VCC1 and an analog power supply VCC2 for the voltage processing circuit; the external power supply circuit provides a digital power supply VCC1 for the current processing circuit;
the input ends of the voltage processing circuit and the current processing circuit are both connected with the anode of the battery to be detected, and the output ends of the voltage processing circuit and the current processing circuit are both connected with the inlet of the electric quantity calculating unit; the outlet of the electric quantity calculating unit is connected with the display;
the voltage processing circuit comprises a voltage sampling and isolating circuit and a voltage signal amplifying circuit which are arranged in series; the current processing circuit comprises a current sampling and isolating circuit and a current signal amplifying circuit which are arranged in series.
Further, the external power supply circuit comprises a voltage reduction circuit, a filter circuit and a voltage stabilization isolation circuit; the output end of the voltage reduction circuit is respectively connected with the input ends of the filter circuit and the voltage stabilization isolation circuit; the filter circuit outputs a digital power supply VCC 1; the voltage stabilizing isolation circuit outputs an analog power supply VCC 2;
the voltage reduction circuit comprises an external power supply, a low-dropout linear voltage regulation chip U1, a resistor R17, a resistor R18, a resistor R19, a capacitor C18, a capacitor C21 and an electrolytic capacitor C13;
the power supply input end VI of the low-dropout linear regulator chip U1, one end of the capacitor C18 and the anode of the electrolytic capacitor C13 are all connected with the anode of the onboard power supply; the other end of the capacitor C18 and the negative electrode of the electrolytic capacitor C13 are both connected with the negative electrode of the onboard power supply; the output voltage setting end ADJ of the low dropout linear regulator chip U1 is connected with the common end of the capacitor C21, the resistor R18 and the resistor R19; the other ends of the capacitor C21 and the resistor R19 are connected with the negative electrode of the onboard power supply; the other end of the resistor R18 is connected with one end of the resistor R17; the resistor R17, the output end VO1 of the low dropout linear regulator chip U1 and the output end VO2 are connected with the filter circuit and the voltage-stabilizing isolation circuit;
the filter circuit comprises a capacitor C12, an electrolytic capacitor C11, an inductor L3, a capacitor C14, a capacitor C15, a capacitor C16 and a capacitor C17;
one end of the capacitor C12, the anode of the electrolytic capacitor C11 and one end of the inductor L3 are all connected with the output end of the voltage reduction circuit; the other end of the capacitor C12 and the negative electrode of the electrolytic capacitor C11 are both connected with the negative electrode of the onboard power supply; the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C17 are arranged in parallel, and the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C17 are connected with the negative electrode of the onboard power supply in a common mode; the common end of the inductor L3, the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C17 is used as an output end, and a digital power supply VCC1 is respectively provided for the voltage processing circuit and the current processing circuit;
the voltage-stabilizing isolation circuit comprises a voltage-stabilizing isolation power supply U3, an inductor L1, a capacitor C6, a capacitor C8, a capacitor C7, an inductor L2, an electrolytic capacitor C10, a capacitor C9 and a resistor R14;
the inductor L1, the capacitor C6 and the capacitor C8 are connected with the power supply positive input end VIN + of the voltage-stabilizing isolation power supply U3 in a common mode; the other end of the inductor L1 is connected with the output end of the voltage reduction circuit; the other end of the capacitor C6, the other end of the capacitor C8 and a power supply negative electrode input end VIN-of the voltage-stabilizing isolation power supply U3 are all connected with the negative electrode of the onboard power supply; a power supply positive output end VOUT + of the voltage-stabilizing isolation power supply U3 is connected with a common end of the inductor L2 and the capacitor C7; the power supply negative output end VOUT-of the voltage-stabilizing isolation power supply U3 and the other end of the capacitor C7 are both connected with the negative electrode of the battery to be tested;
the negative electrode of the electrolytic capacitor C10, one end of the capacitor C9 and one end of the resistor R14 are all connected with the negative electrode of the battery to be tested; the other end of the inductor L2, the anode of the electrolytic capacitor C10, the other end of the capacitor C9 and the other end of the resistor R14 are used as output ends and are connected with an analog power supply end of the voltage sampling and isolating circuit.
Further, the voltage sampling and isolating circuit comprises a resistor R1, a resistor R6, a resistor R10, a capacitor C3 and a precision optical isolation voltage sensor U5; the voltage sampling and isolating circuit is used for collecting the voltage of the battery to be detected;
the positive electrode PWR-IN of the battery to be detected is sequentially connected with the resistor R1, the resistor R6 and the resistor R10 IN series; the two ends of the resistor R10 are connected with the capacitor C3 in parallel; the resistor R6, the resistor R10 and the capacitor C3 are connected with a voltage acquisition input end VIN of the precision optical isolation voltage sensor U5 in common, and the other end of the resistor R10 and the other end of the capacitor C3 are both connected with the cathode of the battery to be tested; the voltage detection grounding end SHDN and the analog power supply grounding end GND1 of the precise optical isolation voltage sensor U5 are both connected with the negative electrode of the battery to be detected; the digital power ground end GND2 of the precision optical isolation voltage sensor U5 is connected with the negative electrode of the onboard power supply; the isolation detection output positive pole VOUT + and the isolation detection output negative pole VOUT-of the precision optical isolation voltage sensor U5 are both connected with the voltage signal amplifying circuit; the digital power supply end VDD2 of the precision optical isolation voltage sensor U5 is connected with the output end of the filter circuit; and the analog power supply end VDD1 of the precision optical isolation voltage sensor U5 is connected with the output end of the voltage stabilizing isolation circuit.
Further, the voltage signal amplifying circuit comprises a resistor R2, a resistor R3, a resistor R7, a resistor R8, a resistor R11, a resistor R13, a resistor R15, a capacitor C1, a capacitor C5, a capacitor C19 and an operational amplifier U7;
one end of the resistor R7 is connected with an isolation detection output anode VOUT + of the precision optical isolation voltage sensor U5; the other end of the resistor R7 is connected with the cathode of the onboard power supply through the resistor R11 and the resistor R13; the resistor R11 and the resistor R13 are connected in series and then are connected in parallel with the capacitor C5;
the resistor R7, the resistor R11 and the capacitor C5 are connected with the non-inverting input end of the operational amplifier U7 in common; the resistor R2 is connected with the resistor R3 in series and then connected with the capacitor C1 in parallel; one end of the resistor R8 is connected with the isolation detection output negative pole VOUT-of the precision optical isolation voltage sensor U5; the resistor R8, the resistor R2 and the capacitor C1 are connected with the inverting input end of the operational amplifier U7 in common; the resistor R3, the capacitor C1 and the resistor R15 are connected with the output end of the operational amplifier U7 in common; the resistor R15 and the capacitor C19 are connected with the inlet of the electric quantity calculating unit in a common mode; the power supply anode of the operational amplifier U7 is connected with the filter circuit; and the negative electrode of the power supply of the operational amplifier U7 is connected with the negative electrode of the onboard power supply.
Further, the current sampling and isolating circuit comprises a linear current sensor U6 and an RC filter circuit; the current sampling and isolating circuit is used for collecting the current of the battery to be tested;
the current input end IP + of the current sensor U6 is connected with the anode PWR-IN of the battery to be detected; the anode of the external load PWR-PAD is connected with the current output end IP-, and the cathode of the external load PWR-PAD is connected with the cathode of the battery to be tested; the voltage output end VOUT of the current sensor U6 is connected with the input end of the RC filter circuit; the output end of the RC filter circuit is connected with the current signal amplifying circuit; a grounding end GNG of the current sensor U6 is connected with the negative pole of the on-board power supply; and the power supply anode VCC of the current sensor U6 is connected with the output end of the filter circuit.
Further, the RC filter circuit comprises a resistor R12 and a capacitor C4 which are arranged in series; one end of the resistor R12 is connected with the voltage output end VOUT of the current sensor U6, and the common end of the resistor R12 and the capacitor C4 is connected with the current signal amplifying circuit; the other end of the capacitor C4 is the cathode of the on-board power supply.
Further, the current signal amplifying circuit comprises a resistor R4, a resistor R5, a resistor R9, a resistor R16, a capacitor C2, a capacitor C20 and an operational amplifier U2;
the non-inverting input end of the operational amplifier U2 is connected with the output end of the RC filter circuit; the inverting input end of the amplifier U2 is connected with the common end of the resistor R9, the resistor R4 and the capacitor C2; the other end of the resistor R9 is connected with the negative pole of the on-board power supply; the other end of the resistor R4 is connected with one end of the resistor R5; the resistor R5 and the capacitor C2 are commonly terminated at one end of the resistor R16; the resistor R16 and the capacitor C20 are connected with the inlet of the electric quantity calculating unit in a common mode; the other end of the capacitor C20 and the power supply cathode of the operational amplifier U2 are both connected with the cathode of the onboard power supply; and the power supply anode of the amplifier U2 is connected with the output end of the filter circuit.
Further, the precision optical isolation voltage sensor U5 is ACPL-C87A-000E; the linear current sensor U6 is model ACS 758.
Further, the display is a loose reinforced notebook CF-31.
The utility model discloses compare prior art's beneficial effect is:
1. the utility model collects the current and voltage signals of the tested battery through the voltage processing circuit and the current processing circuit, processes the current and voltage signals and transmits the processed current and voltage signals to the electric quantity calculating unit, calculates the real-time electric quantity value of the tested battery according to the current and voltage signals by the electric quantity calculating unit, and transmits the value, the real-time voltage value and the real-time electric quantity value to the display; the utility model discloses can direct display accurate real-time electric quantity value to can provide real-time voltage value and real-time current value as the reference, avoid leading to unmanned aerial vehicle to fall in the air because operating personnel misjudgement, cause that unmanned aerial vehicle damages or personnel are injured to get the condition and take place.
2. The utility model discloses a current-voltage acquisition circuit includes voltage sampling and isolating circuit, voltage signal amplifier circuit, current sampling and isolating circuit and current signal amplifier circuit, can keep apart and signal amplification to the voltage and the electric current of gathering, and the real-time electric quantity value of acquireing is more accurate.
3. The utility model discloses a voltage sampling and isolating circuit, voltage signal amplifier circuit, current sampling and isolating circuit and current signal amplifier circuit are integrated as an organic whole, make simple, the reliability is high, easy to maintain repeatedly usable, economic benefits is high.
Drawings
FIG. 1 is a schematic view of an embodiment of the present invention;
FIG. 2 is a circuit diagram of a step-down circuit in the embodiment;
FIG. 3 is a circuit diagram of a filter circuit in the embodiment;
FIG. 4 is a circuit diagram of a regulator isolation circuit in this embodiment;
FIG. 5 is a circuit diagram of a voltage processing circuit in the embodiment;
fig. 6 is a circuit diagram of a current processing circuit in the embodiment;
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, this pure electric unmanned aerial vehicle's battery power detection device includes voltage processing circuit, electric current processing circuit, external power source circuit, electric quantity computational element and display. The display in this embodiment is a loose ruggedized notebook CF-31.
The external power supply circuit provides a 5V analog power supply VCC1 and a 5V analog power supply VCC2 for the voltage processing circuit; the external power supply circuit provides a 5V digital power supply VCC1 for the current processing circuit;
the voltage processing circuit and the current processing circuit acquire current and voltage signals of the airborne power supply, process the current and voltage signals and transmit the processed current and voltage signals to the electric quantity calculating unit in the automatic pilot, and the electric quantity calculating unit calculates a real-time electric quantity value of the battery according to the current and voltage signals and transmits the value to the display; the display displays the electric quantity value of the battery.
The voltage processing circuit comprises a voltage sampling and isolating circuit and a voltage signal amplifying circuit which are arranged in series; the current processing circuit comprises a current sampling and isolating circuit and a current signal amplifying circuit which are arranged in series.
Referring to fig. 2 to 4, the external power supply circuit includes a voltage dropping circuit, a filter circuit, and a voltage stabilizing isolation circuit; the output end of the voltage reduction circuit is respectively connected with the input ends of the filter circuit and the voltage stabilization isolation circuit; the filter circuit outputs a 5V digital power supply VCC 1; the voltage stabilizing isolation circuit outputs a 5V analog power supply VCC 2;
referring to fig. 2, the voltage dropping circuit includes an external power supply, a low dropout regulator chip U1, a resistor R17, a resistor R18, a resistor R19, a capacitor C18, a capacitor C21, and an electrolytic capacitor C13;
the resistor R17, the resistor R18 and the resistor R19 are feedback resistors and are used for adjusting output voltage. The external power supply in this embodiment is a 12V onboard power supply, wherein the 12V mark is an onboard power supply anode, and the inverted triangle mark is an onboard power supply cathode. The circuit can convert a 12V power supply into a 5V power supply.
The power supply input end VI of the low-dropout linear voltage regulation chip U1, one end of the capacitor C18 and the anode of the electrolytic capacitor C13 are connected with the anode of the onboard power supply; the other end of the capacitor C18 and the negative electrode of the electrolytic capacitor C13 are both connected with the negative electrode of the onboard power supply; the output voltage setting end ADJ of the low-dropout linear regulator chip U1 is connected with the common end of the capacitor C21, the resistor R18 and the resistor R19; the other ends of the capacitor C21 and the resistor R19 are connected with the negative electrode of the onboard power supply; the other end of the resistor R18 is connected with one end of the resistor R17; the resistor R17, the output end VO1 of the low dropout linear regulator chip U1 and the output end VO2 are connected with the filter circuit and the voltage-stabilizing isolation circuit;
the filter circuit comprises a capacitor C12, an electrolytic capacitor C11, an inductor L3, a capacitor C14, a capacitor C15, a capacitor C16 and a capacitor C17. The filter circuit carries out filtering processing on the 5V power supply, reduces ripples of the 5V power supply, and improves the quality of the digital power supply VCC 1.
One end of the capacitor C12, the anode of the electrolytic capacitor C11 and one end of the inductor L3 are all connected with the output end of the voltage reduction circuit; the other end of the capacitor C12 and the negative electrode of the electrolytic capacitor C11 are both connected with the negative electrode of the onboard power supply; the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C17 are arranged in parallel, and the common end of the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C17 is connected with the negative electrode of the onboard power supply; the common terminal of the inductor L3, the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C17 serves as an output terminal for providing a digital power supply VCC1 for the voltage processing circuit and the current processing circuit, respectively.
The voltage stabilizing and isolating circuit comprises a voltage stabilizing and isolating power supply U3, an inductor L1, a capacitor C6, a capacitor C8, a capacitor C7, an inductor L2, an electrolytic capacitor C10, a capacitor C9 and a resistor R14. The voltage stabilizing isolation circuit supplies a 5V power supply to the voltage stabilizing isolation power supply U3 and then outputs an analog power supply VCC2, the voltage of the analog power supply VCC2 is also 5V, but the power supply and the digital power supply VCC1 are not directly connected, and the negative pole is not directly connected, so that interference is prevented.
The common end of the inductor L1, the capacitor C6 and the capacitor C8 is connected with the power supply positive input end VIN + of the voltage-stabilizing isolation power supply U3; the other end of the inductor L1 is connected with the output end of the voltage reduction circuit; the other end of the capacitor C6, the other end of the capacitor C8 and a power supply negative electrode input end VIN-of the voltage-stabilizing isolation power supply U3 are all connected with the negative electrode of the onboard power supply; a power supply positive electrode output end VOUT + of the voltage-stabilizing isolation power supply U3 is connected with a common end of the inductor L2 and the capacitor C7; the negative power output end VOUT-of the voltage-stabilizing isolation power supply U3 and the other end of the capacitor C7 are both connected with the negative electrode of the battery to be tested; the negative electrode of the electrolytic capacitor C10, one end of the capacitor C9 and one end of the resistor R14 are all connected with the negative electrode of the battery to be tested; the other end of the inductor L2, the anode of the electrolytic capacitor C10, the other end of the capacitor C9 and the other end of the resistor R14 are used as output ends and connected with an analog power supply end of the voltage sampling and isolating circuit.
Referring to fig. 5:
the voltage sampling and isolating circuit is used for collecting the voltage of the tested battery and comprises a resistor R1, a resistor R6, a resistor R10, a capacitor C3 and a precise optical isolation voltage sensor U5. The model of the precise optical isolation voltage sensor U5 is ACPL-C87A-000E.
The positive electrode PWR-IN of the battery to be tested is sequentially connected with the resistor R1, the resistor R6 and the resistor R10 IN series, and two ends of the resistor R10 are connected with the capacitor C3 IN parallel; the common end of the resistor R6, the resistor R10 and the capacitor C3 is connected with a voltage acquisition input end VIN of the precision optical isolation voltage sensor U5, and the other end of the resistor R10 and the other end of the capacitor C3 are connected with the negative electrode of the battery to be tested. The voltage detection grounding end SHDN and the analog power supply grounding end GND1 of the precise optical isolation voltage sensor U5 are both connected with the negative electrode of the battery to be detected; the digital power ground GND2 of the precision optical isolation voltage sensor U5 is connected with the negative pole of the onboard power supply; an isolation detection output positive pole VOUT + and an isolation detection output negative pole VOUT-of the precision optical isolation voltage sensor U5 are both connected with a voltage signal amplifying circuit; the digital power supply end VDD2 of the precision optical isolation voltage sensor U5 is connected with the output end of the filter circuit; the power supply end VDD1 of the analog power supply of the precision optical isolation voltage sensor U5 is connected with the output end of the voltage stabilizing isolation circuit.
Because the voltage of the tested battery exceeds 50V, the internal circuit is burnt out when the tested battery directly enters the precision optical isolation voltage sensor U5, different parameters are selected through the voltage dividing resistor R1, the resistor R6 and the resistor R10, the high voltage 1/25 of the tested battery is input to the power input end VIN of the precision optical isolation voltage sensor U5, the output voltage of the voltage sampling and isolation circuit is equal to VOUT + minus VOUT-, and the obtained result is the voltage signal which needs to be acquired and calculated.
The voltage signal amplifying circuit comprises a resistor R2, a resistor R3, a resistor R7, a resistor R8, a resistor R11, a resistor R13, a resistor R15, a capacitor C1, a capacitor C5, a capacitor C19 and an operational amplifier U7. The operational amplifier U7 is model OPA 140. V-SIN is an output voltage detection signal.
One end of the resistor R7 is connected with an isolation detection output anode VOUT + of the precision optical isolation voltage sensor U5; the other end of the resistor R7 is connected with the negative electrode of the onboard power supply after passing through the resistor R11 and the resistor R13; the resistor R11 and the resistor R13 are connected in parallel with the capacitor C5;
the resistor R7, the resistor R11 and the capacitor C5 are connected with the non-inverting input end of the operational amplifier U7 in common; the resistor R2 is connected with the resistor R3 in series and then connected with the capacitor C1 in parallel; one end of the resistor R8 is connected with the isolation detection output negative pole VOUT-of the precision optical isolation voltage sensor U5; the resistor R8, the resistor R2 and the capacitor C1 are commonly connected with the inverting input end of the operational amplifier U7, and the resistor R3, the capacitor C1 and the resistor R15 are commonly connected with the output end of the operational amplifier U7; the common end of the resistor R15 and the capacitor C19 is connected with the inlet of the electric quantity calculating unit; the positive electrode of the power supply of the operational amplifier U7 is connected with the filter circuit; the power supply cathode of the operational amplifier U7 is connected to the cathode of the on-board power supply.
The voltage signal output by the voltage sampling and isolating circuit is small, which is not beneficial to the detection and calculation of the electric quantity calculating unit and needs further amplification processing. VOUT + and VOUT-output by the voltage sampling and isolating circuit are input to a non-inverting input end and an inverting input end of an operational amplifier U7, a voltage detection signal V-SIN is output from an output end, and the amplitude of the amplified voltage detection signal V-SIN is adjusted by configuring different feedback resistance parameters, so that the voltage detection signal V-SIN is within an acceptable range. In this embodiment, R2 ═ R11, R3 ═ R13, R7 ═ R8, and magnification ═ R2+ R3)/R8.
Referring to fig. 6:
the current sampling and isolating circuit comprises a linear current sensor U6 and an RC filter circuit; the current sampling and isolating circuit is used for collecting the current of the battery to be tested. The linear current sensor U6 is model ACS 758.
The current input end IP + of the current sensor U6 is connected with the anode PWR-IN of the battery to be detected; the anode of the external load PWR-PAD is connected with the current output end IP-, and the cathode of the external load PWR-PAD is connected with the cathode of the battery to be tested; a voltage output end VOUT of the current sensor U6 is connected with an input end of the RC filter circuit; the output end of the RC filter circuit is connected with the current signal amplifying circuit; the grounding end GNG of the current sensor U6 is connected with the negative pole of the onboard power supply; the power supply anode VCC of the current sensor U6 is connected with the output end of the filter circuit.
The RC filter circuit comprises a resistor R12 and a capacitor C4 which are arranged in series; one end of the resistor R12 is connected with the voltage output end VOUT of the current sensor U6, and the common end of the resistor R12 and the capacitor C4 is connected with the current signal amplifying circuit; the other end of the capacitor C4 is connected with the negative electrode of the tested battery.
The current output by the battery to be tested flows in through the current input end IP + and flows out from the current output end IP-, when the current flows through the current sampling and isolating circuit, because the current can generate a magnetic field around when flowing, and the intensity of the magnetic field is in direct proportion to the magnitude of the current, the magnitude of the current is judged by judging the intensity of the magnetic field, then the current value is output through the internal comparator, and the stable current value can be obtained through the RC filter circuit. Because the electromagnetic interaction is an isolation signal, the current sampling and isolating circuit has an isolation function at the same time.
The voltage signal output by the current sampling and isolating circuit is small, which is not beneficial to the detection and calculation of the electric quantity calculating unit and needs further amplification processing. And adjusting the amplitude of the amplified voltage signal by configuring different feedback resistance parameters.
The current signal amplifying circuit comprises a resistor R4, a resistor R5, a resistor R9, a resistor R16, a capacitor C2, a capacitor C20 and an operational amplifier U2.
The non-inverting input end of the operational amplifier U2 is connected with the output end of the RC filter circuit; the inverting input end of the amplifier U2 is connected with the common end of the resistor R9, the resistor R4 and the capacitor C12; the other end of the resistor R9 is connected with the negative pole of the onboard power supply; the other end of the resistor R4 is connected with one end of the resistor R5; the resistor R5 and the capacitor C2 are connected with one end of the resistor R16 in common; the common end of the resistor R16 and the capacitor C20 is connected with the inlet of the electric quantity calculating unit; the other end of the capacitor C20 and the power supply cathode of the operational amplifier U2 are connected with the cathode of the onboard power supply; the power supply anode of the amplifier U2 is connected with the output end of the filter circuit.
Voltage sampling and isolating circuit, voltage signal amplifier circuit, current sampling and isolating circuit and current signal amplifier circuit among this pure electric unmanned aerial vehicle's battery electric quantity detection device are integrated as an organic whole, simple structure.
The method for measuring the electric quantity of the battery electric quantity detection device of the pure electric unmanned aerial vehicle comprises the following steps:
step 1) an external power supply circuit reduces the voltage of an airborne power supply;
step 2) the voltage sampling and isolating circuit collects the decompressed voltage signal and shields the interference signal, and outputs a clean voltage signal;
step 3) the voltage signal amplifying circuit increases the amplitude of the clean voltage signal in the step 2 and transmits the amplified voltage signal to an automatic pilot;
step 4), the current sampling and isolating circuit collects the decompressed current signals, shields interference signals and outputs stable current signals;
step 5) the current signal amplifying circuit increases the amplitude of the stable current signal in the step 2 and transmits the amplified current signal to an automatic pilot;
step 6) converting the voltage signal amplified in the step 3) into a real-time voltage value and converting the current signal amplified in the step 5) into a real-time current value by the automatic pilot, and transmitting the real-time voltage value and the real-time current value to a display;
step 7), the automatic pilot calculates the consumed electric quantity value through an integral algorithm according to the real-time current value, then obtains the real-time electric quantity value according to the consumed electric quantity value and transmits the value to a display;
step 8), displaying the real-time voltage value, the real-time current value and the real-time electric quantity value of the battery by a display;
and 9) an operator determines whether to control the unmanned aerial vehicle to make corresponding flight actions by observing the real-time electric quantity and referring to the real-time voltage value and the real-time current value.
Claims (9)
1. The utility model provides a pure electric unmanned aerial vehicle's battery power detection device which characterized in that:
the device comprises a voltage processing circuit, a current processing circuit, an external power supply circuit, an electric quantity calculating unit and a display;
the external power supply circuit provides a digital power supply VCC1 and an analog power supply VCC2 for the voltage processing circuit; the external power supply circuit provides a digital power supply VCC1 for the current processing circuit;
the input ends of the voltage processing circuit and the current processing circuit are both connected with the anode of the battery to be detected, and the output ends of the voltage processing circuit and the current processing circuit are both connected with the inlet of the electric quantity calculating unit; the outlet of the electric quantity calculating unit is connected with the display;
the voltage processing circuit comprises a voltage sampling and isolating circuit and a voltage signal amplifying circuit which are arranged in series; the current processing circuit comprises a current sampling and isolating circuit and a current signal amplifying circuit which are arranged in series.
2. The battery power detection device of the pure electric unmanned aerial vehicle according to claim 1, characterized in that:
the external power supply circuit comprises a voltage reduction circuit, a filter circuit and a voltage stabilization isolation circuit; the output end of the voltage reduction circuit is respectively connected with the input ends of the filter circuit and the voltage stabilization isolation circuit; the filter circuit outputs a digital power supply VCC 1; the voltage stabilizing isolation circuit outputs an analog power supply VCC 2;
the voltage reduction circuit comprises an external power supply, a low-dropout linear voltage regulation chip U1, a resistor R17, a resistor R18, a resistor R19, a capacitor C18, a capacitor C21 and an electrolytic capacitor C13;
the power supply input end VI of the low-dropout linear regulator chip U1, one end of the capacitor C18 and the anode of the electrolytic capacitor C13 are all connected with the anode of the onboard power supply; the other end of the capacitor C18 and the negative electrode of the electrolytic capacitor C13 are both connected with the negative electrode of the onboard power supply; the output voltage setting end ADJ of the low dropout linear regulator chip U1 is connected with the common end of the capacitor C21, the resistor R18 and the resistor R19; the other ends of the capacitor C21 and the resistor R19 are connected with the negative electrode of the onboard power supply; the other end of the resistor R18 is connected with one end of the resistor R17; the resistor R17, the output end VO1 of the low dropout linear regulator chip U1 and the output end VO2 are connected with the filter circuit and the voltage-stabilizing isolation circuit;
the filter circuit comprises a capacitor C12, an electrolytic capacitor C11, an inductor L3, a capacitor C14, a capacitor C15, a capacitor C16 and a capacitor C17;
one end of the capacitor C12, the anode of the electrolytic capacitor C11 and one end of the inductor L3 are all connected with the output end of the voltage reduction circuit; the other end of the capacitor C12 and the negative electrode of the electrolytic capacitor C11 are both connected with the negative electrode of the onboard power supply; the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C17 are arranged in parallel, and the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C17 are connected with the negative electrode of the onboard power supply in a common mode; the common end of the inductor L3, the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C17 is used as an output end, and a digital power supply VCC1 is respectively provided for the voltage processing circuit and the current processing circuit;
the voltage-stabilizing isolation circuit comprises a voltage-stabilizing isolation power supply U3, an inductor L1, a capacitor C6, a capacitor C8, a capacitor C7, an inductor L2, an electrolytic capacitor C10, a capacitor C9 and a resistor R14;
the inductor L1, the capacitor C6 and the capacitor C8 are connected with the power supply positive input end VIN + of the voltage-stabilizing isolation power supply U3 in a common mode; the other end of the inductor L1 is connected with the output end of the voltage reduction circuit; the other end of the capacitor C6, the other end of the capacitor C8 and a power supply negative electrode input end VIN-of the voltage-stabilizing isolation power supply U3 are all connected with the negative electrode of the onboard power supply; a power supply positive output end VOUT + of the voltage-stabilizing isolation power supply U3 is connected with a common end of the inductor L2 and the capacitor C7; the power supply negative output end VOUT-of the voltage-stabilizing isolation power supply U3 and the other end of the capacitor C7 are both connected with the negative electrode of the battery to be tested;
the negative electrode of the electrolytic capacitor C10, one end of the capacitor C9 and one end of the resistor R14 are all connected with the negative electrode of the battery to be tested; the other end of the inductor L2, the anode of the electrolytic capacitor C10, the other end of the capacitor C9 and the other end of the resistor R14 are used as output ends and are connected with an analog power supply end of the voltage sampling and isolating circuit.
3. The battery power detection device of the pure electric unmanned aerial vehicle according to claim 2, characterized in that:
the voltage sampling and isolating circuit comprises a resistor R1, a resistor R6, a resistor R10, a capacitor C3 and a precise optical isolation voltage sensor U5; the voltage sampling and isolating circuit is used for collecting the voltage of the battery to be detected;
the positive electrode PWR-IN of the battery to be detected is sequentially connected with the resistor R1, the resistor R6 and the resistor R10 IN series; the two ends of the resistor R10 are connected with the capacitor C3 in parallel; the resistor R6, the resistor R10 and the capacitor C3 are connected with a voltage acquisition input end VIN of the precision optical isolation voltage sensor U5 in common, and the other end of the resistor R10 and the other end of the capacitor C3 are both connected with the cathode of the battery to be tested; the voltage detection grounding end SHDN and the analog power supply grounding end GND1 of the precise optical isolation voltage sensor U5 are both connected with the negative electrode of the battery to be detected; the digital power ground end GND2 of the precision optical isolation voltage sensor U5 is connected with the negative electrode of the onboard power supply; the isolation detection output positive pole VOUT + and the isolation detection output negative pole VOUT-of the precision optical isolation voltage sensor U5 are both connected with the voltage signal amplifying circuit; the digital power supply end VDD2 of the precision optical isolation voltage sensor U5 is connected with the output end of the filter circuit; and the analog power supply end VDD1 of the precision optical isolation voltage sensor U5 is connected with the output end of the voltage stabilizing isolation circuit.
4. The battery power detection device of the pure electric unmanned aerial vehicle according to claim 3, characterized in that:
the voltage signal amplifying circuit comprises a resistor R2, a resistor R3, a resistor R7, a resistor R8, a resistor R11, a resistor R13, a resistor R15, a capacitor C1, a capacitor C5, a capacitor C19 and an operational amplifier U7;
one end of the resistor R7 is connected with an isolation detection output anode VOUT + of the precision optical isolation voltage sensor U5; the other end of the resistor R7 is connected with the cathode of the onboard power supply through the resistor R11 and the resistor R13; the resistor R11 and the resistor R13 are connected in series and then are connected in parallel with the capacitor C5;
the resistor R7, the resistor R11 and the capacitor C5 are connected with the non-inverting input end of the operational amplifier U7 in common; the resistor R2 is connected with the resistor R3 in series and then connected with the capacitor C1 in parallel; one end of the resistor R8 is connected with the isolation detection output negative pole VOUT-of the precision optical isolation voltage sensor U5; the resistor R8, the resistor R2 and the capacitor C1 are connected with the inverting input end of the operational amplifier U7 in common; the resistor R3, the capacitor C1 and the resistor R15 are connected with the output end of the operational amplifier U7 in common; the resistor R15 and the capacitor C19 are connected with the inlet of the electric quantity calculating unit in a common mode; the power supply anode of the operational amplifier U7 is connected with the filter circuit; and the negative electrode of the power supply of the operational amplifier U7 is connected with the negative electrode of the onboard power supply.
5. The battery power detection device of the pure electric unmanned aerial vehicle according to claim 4, characterized in that:
the current sampling and isolating circuit comprises a linear current sensor U6 and an RC filter circuit; the current sampling and isolating circuit is used for collecting the current of the battery to be tested;
the current input end IP + of the current sensor U6 is connected with the anode PWR-IN of the battery to be detected; the anode of the external load PWR-PAD is connected with the current output end IP-, and the cathode of the external load PWR-PAD is connected with the cathode of the battery to be tested; the voltage output end VOUT of the current sensor U6 is connected with the input end of the RC filter circuit; the output end of the RC filter circuit is connected with the current signal amplifying circuit; a grounding end GNG of the current sensor U6 is connected with the negative pole of the on-board power supply; and the power supply anode VCC of the current sensor U6 is connected with the output end of the filter circuit.
6. The battery power detection device of the pure electric unmanned aerial vehicle according to claim 5, characterized in that:
the RC filter circuit comprises a resistor R12 and a capacitor C4 which are arranged in series; one end of the resistor R12 is connected with the voltage output end VOUT of the current sensor U6, and the common end of the resistor R12 and the capacitor C4 is connected with the current signal amplifying circuit; the other end of the capacitor C4 is the cathode of the on-board power supply.
7. The battery power detection device of the pure electric unmanned aerial vehicle according to claim 6, characterized in that:
the current signal amplifying circuit comprises a resistor R4, a resistor R5, a resistor R9, a resistor R16, a capacitor C2, a capacitor C20 and an operational amplifier U2;
the non-inverting input end of the operational amplifier U2 is connected with the output end of the RC filter circuit; the inverting input end of the amplifier U2 is connected with the common end of the resistor R9, the resistor R4 and the capacitor C2; the other end of the resistor R9 is connected with the negative pole of the on-board power supply; the other end of the resistor R4 is connected with one end of the resistor R5; the resistor R5 and the capacitor C2 are commonly terminated at one end of the resistor R16; the resistor R16 and the capacitor C20 are connected with the inlet of the electric quantity calculating unit in a common mode; the other end of the capacitor C20 and the power supply cathode of the operational amplifier U2 are both connected with the cathode of the onboard power supply; and the power supply anode of the amplifier U2 is connected with the output end of the filter circuit.
8. The battery power detection device of the pure electric unmanned aerial vehicle according to claim 7, characterized in that:
the model of the precise optical isolation voltage sensor U5 is ACPL-C87A-000E; the linear current sensor U6 is model ACS 758.
9. The battery power detection device of the pure electric unmanned aerial vehicle according to claim 8, characterized in that: the display is a loose reinforced notebook CF-31.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921224887.7U CN210665974U (en) | 2019-07-31 | 2019-07-31 | Battery power detection device of pure electric unmanned aerial vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921224887.7U CN210665974U (en) | 2019-07-31 | 2019-07-31 | Battery power detection device of pure electric unmanned aerial vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361667A (en) * | 2019-07-31 | 2019-10-22 | 西安爱生无人机技术有限公司 | The battery electric quantity checking device and method of pure electric vehicle unmanned plane |
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2019
- 2019-07-31 CN CN201921224887.7U patent/CN210665974U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361667A (en) * | 2019-07-31 | 2019-10-22 | 西安爱生无人机技术有限公司 | The battery electric quantity checking device and method of pure electric vehicle unmanned plane |
| CN110361667B (en) * | 2019-07-31 | 2024-03-12 | 西安爱生无人机技术有限公司 | Battery electric quantity detection device and method of pure electric unmanned aerial vehicle |
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