CN112763021B - Calibration-free method for fuel measurement system - Google Patents
Calibration-free method for fuel measurement system Download PDFInfo
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- CN112763021B CN112763021B CN202011598647.0A CN202011598647A CN112763021B CN 112763021 B CN112763021 B CN 112763021B CN 202011598647 A CN202011598647 A CN 202011598647A CN 112763021 B CN112763021 B CN 112763021B
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- fuel
- oil
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- calibration
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- 239000000446 fuel Substances 0.000 title claims abstract description 111
- 238000005259 measurement Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007599 discharging Methods 0.000 claims abstract description 16
- 238000007654 immersion Methods 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 61
- 239000000295 fuel oil Substances 0.000 claims description 13
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses a calibration-free method of a fuel measurement system, which comprises the following steps: the consistency control of the fuel measuring parts is adopted, and zero full values of all fuel sensors in each aircraft are obtained by adding and discharging fuel on a plurality of aircraft for the first time; comparing zero full values of all the oil mass sensors in the aircraft, finding out the difference of the zero full values and performing compensation calculation to obtain a standard zero full value; and for all fuel measuring computers in the fuel measuring system, a standard zero full value is adopted as a calculation basis of the immersion height of the fuel sensor, so that the calibration-free function of the fuel measuring system is realized. By adopting the technical scheme provided by the invention, zero-full calibration is not required for each machine, the oil adding and discharging operation is not required, the time and the labor are saved, the use and the maintenance are convenient, the unified management of the state is easy, the difficult problem of oil adding and discharging calibration in the fuel measurement is solved, and the fuel measurement precision requirement is met.
Description
Technical Field
The invention relates to the technical field of aircraft fuel measurement, in particular to a method for calibrating a fuel measurement system.
Background
At present, the most widely used measurement form is a digital capacitive fuel measurement system, a fuel measurement computer is used as a center, a linear capacitive fuel sensor is adopted, the fuel sensor output signal reflects the fuel immersion height of the fuel sensor, and the fuel measurement computer in the system obtains the fuel quantity through data processing operation according to the fuel sensor signal, the flight attitude signal and the like.
In the existing measurement mode, the fuel measurement computer directly influences the fuel measurement accuracy according to whether the calibrated empty capacitance value and the calibrated full capacitance value are accurate or not according to the oil immersion height of the oil quantity sensor of the calibrated empty capacitance value and the calibrated full capacitance value.
Because of the differences between the measurement components and their spare parts, fuel measurement errors may become greater after the fuel measurement computer uses the same zero full capacitance value or fuel measurement system changes components. In general, when each machine leaves the factory, zero full capacitance value calibration is required, and after the components of the fuel measurement system are replaced, zero full capacitance value calibration is required again.
Disclosure of Invention
The purpose of the invention is that: the embodiment of the invention provides a calibration-free method for a fuel measurement system, which aims to solve the problem that zero full capacitance value calibration is required after each machine leaves a factory or changes fuel measurement system components at present.
The technical scheme adopted by the invention is as follows: the embodiment of the invention provides a calibration-free method of a fuel measurement system, which comprises the following steps:
based on consistency control of the fuel measuring parts, adding and discharging oil to a plurality of aircraft for the first time to obtain zero full values of all oil quantity sensors in each aircraft;
comparing zero full values of all the oil mass sensors in the aircraft, finding out the difference of the zero full values and performing compensation calculation to obtain a standard zero full value;
and for all fuel measuring computers in the fuel measuring system, the standard zero full value is adopted as the calculation basis of the immersion height of the fuel sensor, so that the calibration-free function of the fuel measuring system is realized.
Optionally, in the calibration-free method of the fuel measurement system as described above, the method specifically includes:
step 1, consistency control is carried out on a fuel measuring component;
step 2, for a plurality of aircrafts, recording the empty capacitance values and the full capacitance values of all the oil mass sensors in the installed state;
step 3, comparing the recorded zero-full value differences and obtaining a standard zero-full value;
and 4, importing the standard zero full value obtained in the step 3 into fuel oil measuring computers of all the aircrafts.
Optionally, in the calibration-free method of the fuel measurement system, in step 1, the consistency control of the fuel measurement component includes:
step 11, consistency control is carried out on the oil mass sensor and the dielectric constant sensor, so that the allowable error range of the dry capacitance values of all the sensors is +/-0.5 pF;
step 12, carrying out consistency control on the oil mass measurement cable to enable the allowable error range of the length of the oil mass measurement cable to be +1%;
and 13, carrying out consistency control on the fuel measuring computers, and controlling the H-V curve of each fuel measuring computer within a preset range.
Optionally, in the calibration-free method of the fuel measurement system as described above, in step 13, the purpose of controlling the H-V curve of each fuel measurement computer within the preset range is: so that the zero oil value and the full oil value do not exceed +/-0.5% of the standard oil value under the conditions of the oil quantity measuring cable and the sensor.
Optionally, in the calibration-free method of the fuel measurement system as described above, the step 2 includes:
before the first refueling of the aircraft, a fuel measuring computer in the aircraft records the empty capacitance values of all fuel sensors in the installed environment, and after the aircraft is filled with fuel, the full capacitance value of the environment on the aircraft is recorded;
the zero full value of all the fuel quantity sensors in all the aircraft is recorded by first refueling and discharging fuel on the aircraft of 2 to 3 aircraft.
Optionally, in the calibration-free method of the fuel measurement system as described above, the step 3 includes:
and comparing zero full values of the oil mass sensors in all the aircrafts, finding out the difference of the zero full values of the sensors at the same position of different aircrafts, performing compensation calculation, and taking the obtained optimal zero full value as a standard zero full value.
Optionally, in the calibration-free method of the fuel measurement system, as described above, the H-V curve corresponding to the standard zero full value coincides with the actual H-V curve of the fuel tank; or,
and the H-V curve corresponding to the standard zero full value is within the allowable error range of the actual H-V curve of the oil tank.
Optionally, in the calibration-free method of the fuel measurement system as described above, the step 4 includes:
and (3) introducing a standard zero full value into fuel oil measuring computers of all the aircrafts to serve as a calculation basis of the immersion oil heights of all the oil quantity sensors, so that a calibration-free function of the fuel oil measuring system is realized.
The invention has the advantages that: the embodiment of the invention provides a calibration-free method for a fuel measurement system, which adopts consistency control of fuel measurement components, and obtains zero full values of all fuel quantity sensors in each aircraft by adding and discharging fuel on a plurality of aircraft for the first time; comparing zero full values of all the oil mass sensors in the aircraft, finding out the difference of the zero full values and performing compensation calculation to obtain a standard zero full value; and for all fuel measuring computers in the fuel measuring system, a standard zero full value is adopted as a calculation basis of the immersion height of the fuel sensor, so that the calibration-free function of the fuel measuring system is realized. The technical scheme provided by the invention has the advantages of no need of zero-full calibration on each aircraft, no need of adding and discharging oil, time and labor saving, convenient use and maintenance, easy unified management of states and the like, solves the difficult problem of fuel measurement adding and discharging oil calibration, meets the requirement of fuel measurement precision, and particularly solves the problem that zero-full capacitance value calibration is needed after each aircraft leaves a factory or changes a fuel measurement system component at present.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate and do not limit the invention.
FIG. 1 is a flow chart of a calibration-free method for a fuel measurement system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the consistency control of the H-V curve of the fuel measuring computer according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of an H-V curve corresponding to a standard zero-full value obtained by using the calibration-free method of the fuel measurement system according to the embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
Aiming at the problems that in the prior art, zero full capacitance value calibration is required after each machine leaves a factory or fuel oil measurement system components are replaced.
For an airplane with small oil carrying quantity, although the oil discharging calibration can be added again to eliminate the difference so as to meet the requirement of fuel oil measurement precision, a great deal of manpower resources are required to be spent on zero full capacitance value calibration; for an airplane with large oil loading quantity, the re-filling and discharging oil calibration workload is huge, time and labor are consumed, and an accurate empty capacitance value is difficult to obtain.
In order to improve the use maintainability of the fuel measurement system, the embodiment of the invention provides a calibration-free method of the fuel measurement system, which aims to realize that the installed or replaced parts of the fuel measurement system do not need to be calibrated and the measurement precision is satisfied.
The following specific embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
The embodiment of the invention provides a calibration-free method of a fuel measurement system, which adopts consistency control of fuel measurement components, and obtains zero full values of all fuel sensors in each aircraft by adding and discharging fuel on a plurality of aircraft for the first time; comparing zero full values of all the oil mass sensors in the aircraft, finding out the difference of the zero full values and performing compensation calculation to obtain a standard zero full value; and for all fuel measuring computers in the fuel measuring system, a standard zero full value is adopted as a calculation basis of the immersion height of the fuel sensor, so that the calibration-free function of the fuel measuring system is realized.
Fig. 1 is a flowchart of a calibration-free method of a fuel measurement system according to an embodiment of the present invention. As shown in fig. 1, the calibration-free method for the fuel measurement system provided by the embodiment of the invention comprises the following steps:
step one: and consistency control is performed on the fuel measuring component.
The specific implementation mode of the first step comprises the following steps:
step a, consistency control of the oil mass sensor and the dielectric constant sensor is carried out, so that the allowable error range of the dry capacitance values of all the sensors is +/-0.5 pF;
step b, controlling the consistency of the oil mass measurement cable to enable the allowable error range of the length of the oil mass measurement cable to be +1%;
step c, controlling the consistency of the fuel measuring computers, and controlling the H-V curve of each fuel measuring computer within a certain range, wherein the purpose of the consistency control in the step c is as follows: under the condition of the installed oil quantity measuring cable and the sensor, the zero oil value and the full oil value are not more than +/-0.5% of the standard value, as shown in fig. 2, which is a schematic diagram of the consistency control of the H-V curve of the fuel oil measuring computer in the embodiment of the invention.
Step two: the empty and full capacitance values of the installed state are recorded.
The specific implementation mode of the second step comprises the following steps: before the first refueling of the aircraft, the empty capacitance values of all the oil quantity sensors in the installed environment are recorded for the fuel oil measuring computers in a plurality of aircraft, and after the oil is filled, the full capacitance values of all the oil quantity sensors in the upper environment of the aircraft are recorded.
By first filling and discharging oil on 2 to 3 aircraft, the zero full value of all oil quantity sensors is recorded.
Step three: the recorded zero-full differences are compared and a standard zero-full value is obtained.
The specific implementation mode of the third step comprises the following steps: comparing zero full values of the oil mass sensors in all the aircrafts, finding out the difference of the zero full values of the sensors at the same position of different aircrafts, and performing compensation calculation to obtain a group of optimal zero full values as standard zero full values, wherein the optimal zero full values are shown in fig. 3 and are schematic diagrams of H-V curves corresponding to the standard zero full values obtained by the calibration-free method of the fuel oil measuring system provided by the embodiment of the invention.
In one implementation manner of the embodiment of the invention, the H-V curve corresponding to the standard zero full value obtained in the step three coincides with the actual H-V curve of the oil tank.
In another implementation manner of the embodiment of the present invention, the H-V curve corresponding to the standard zero full value obtained in the third step is within the allowable error range of the actual H-V curve of the oil tank, as shown in fig. 3.
Step four: and a standard zero full value is introduced to realize the calibration-free function of the fuel measurement system.
The specific implementation mode of the fourth step comprises the following steps: and (3) introducing a standard zero full value into fuel oil measuring computers of all the aircrafts to serve as a calculation basis of the immersion oil heights of all the oil quantity sensors, so that a calibration-free function of the fuel oil measuring system is realized.
The calibration-free method for the fuel measurement system provided by the embodiment of the invention adopts the consistency control of the fuel measurement components, and the zero full value of all the fuel sensors in each aircraft is obtained by adding and discharging fuel on a plurality of aircraft for the first time; comparing zero full values of all the oil mass sensors in the aircraft, finding out the difference of the zero full values and performing compensation calculation to obtain a standard zero full value; and for all fuel measuring computers in the fuel measuring system, a standard zero full value is adopted as a calculation basis of the immersion height of the fuel sensor, so that the calibration-free function of the fuel measuring system is realized. The technical scheme provided by the invention has the advantages of no need of zero-full calibration on each aircraft, no need of adding and discharging oil, time and labor saving, convenient use and maintenance, easy unified management of states and the like, solves the difficult problem of fuel measurement adding and discharging oil calibration, meets the requirement of fuel measurement precision, and particularly solves the problem that zero-full capacitance value calibration is needed after each aircraft leaves a factory or changes a fuel measurement system component at present.
The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (3)
1. A calibration-free method for a fuel measurement system, comprising:
based on consistency control of the fuel measuring parts, adding and discharging oil to a plurality of aircraft for the first time to obtain zero full values of all oil quantity sensors in each aircraft;
comparing zero full values of all the oil mass sensors in the aircraft, finding out the difference of the zero full values and performing compensation calculation to obtain a standard zero full value;
the standard zero full value is adopted as the calculation basis of the immersion height of the oil sensor for all the fuel measuring computers in the fuel measuring system, so that the calibration-free function of the fuel measuring system is realized; the method specifically comprises the following steps:
step 1, consistency control is carried out on a fuel measuring component;
step 2, for a plurality of aircrafts, recording the empty capacitance values and the full capacitance values of all the oil mass sensors in the installed state; the step 2 comprises the following steps: before the first refueling of the aircraft, a fuel measuring computer in the aircraft records the empty capacitance values of all fuel sensors in the installed environment, and after the aircraft is filled with fuel, the full capacitance value of the environment on the aircraft is recorded;
step 3, comparing the recorded zero-full value differences and obtaining a standard zero-full value; the step 3 comprises the following steps: comparing zero full values of the oil mass sensors in all the aircrafts, finding out the difference of the zero full values of the sensors at the same position of different aircrafts, performing compensation calculation, and taking the obtained optimal zero full value as a standard zero full value;
step 4, importing the standard zero full value obtained in the step 3 into fuel oil measuring computers of all airplanes;
in the step 1, the consistency control of the fuel measuring component includes:
step 11, consistency control is carried out on the oil mass sensor and the dielectric constant sensor, so that the allowable error range of the dry capacitance values of all the sensors is +/-0.5 pF;
step 12, carrying out consistency control on the oil mass measurement cable to enable the allowable error range of the length of the oil mass measurement cable to be +1%;
step 13, consistency control is carried out on the fuel measuring computers, and the H-V curve of each fuel measuring computer is controlled within a preset range; the H-V curve corresponding to the standard zero full value is overlapped with the actual H-V curve of the oil tank; or the H-V curve corresponding to the standard zero full value is in the allowable error range of the actual H-V curve of the oil tank.
2. The calibration-free method of the fuel measurement system according to claim 1, wherein in the step 13, the H-V curve of each fuel measurement computer is controlled within a preset range for the purpose of: so that the zero oil value and the full oil value do not exceed +/-0.5% of the standard oil value under the conditions of the oil quantity measuring cable and the sensor.
3. The calibration-free method of a fuel measurement system according to claim 1, wherein the step 4 comprises:
and (3) introducing a standard zero full value into fuel oil measuring computers of all the aircrafts to serve as a calculation basis of the immersion oil heights of all the oil quantity sensors, so that a calibration-free function of the fuel oil measuring system is realized.
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| CN1243095A (en) * | 1998-07-29 | 2000-02-02 | 株式会社龍野 | Fuel-oil supply apparatus |
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| CN111968171A (en) * | 2020-08-13 | 2020-11-20 | 北京航空航天大学 | Aircraft oil quantity measuring method and system based on artificial intelligence |
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2020
- 2020-12-29 CN CN202011598647.0A patent/CN112763021B/en active Active
Patent Citations (6)
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| CN1243095A (en) * | 1998-07-29 | 2000-02-02 | 株式会社龍野 | Fuel-oil supply apparatus |
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| Title |
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