CN109632034A - A kind of oil mass detection device and oil mass detection method - Google Patents
A kind of oil mass detection device and oil mass detection method Download PDFInfo
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- CN109632034A CN109632034A CN201811518712.7A CN201811518712A CN109632034A CN 109632034 A CN109632034 A CN 109632034A CN 201811518712 A CN201811518712 A CN 201811518712A CN 109632034 A CN109632034 A CN 109632034A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
Abstract
The present invention relates to a kind of oil mass detection devices, are related to volumetric measurement field.It include: information input terminal, liquid surface height sensor and processor, the liquid surface height sensor is used to obtain the liquid level of oil liquid and is sent to the processor, for obtaining container model information and being sent to the processor, the processor is used to obtain oil mass information according to the liquid level and the container model information information input terminal.This programme solves how in precise measurement container the technical issues of Fuel Oil Remaining detection device, suitable for the measurement to Fuel Oil Remaining in fuel tank.
Description
Technical field
The present invention relates to volumetric measurement field, in particular to a kind of oil mass detection device and oil mass detection method.
Background technique
Oil mass detection device is a kind of remaining oil plant capacity checking apparatus for work machine inner pressurd vessel.It is existing
There are two types of measurement methods for oil mass detection device, first is that the oil plant in acquisition oil circuit is detected, second is that according to resistance in container
Variation measures, but is easy to lead to error by such environmental effects using the above method.
Summary of the invention
The technical problem to be solved by the present invention is to how Fuel Oil Remaining detection device in precise measurement container.
The technical scheme to solve the above technical problems is that a kind of oil mass detection device, comprising: information input
End, liquid surface height sensor and processor, the liquid surface height sensor are used to obtain the liquid level of oil liquid and are sent to institute
Processor is stated, for obtaining container model information and being sent to the processor, the processor is used for the information input terminal
Oil mass information is obtained according to the liquid level and the container model information.
In the present solution, processor carries out dropping cut slice to container model information, then the volume after recording slice every time is built
The tables of data of vertical container model corresponding volume under different height, the body of remaining liq is obtained further according to liquid level and tables of data
Product, i.e. oil mass information.
The beneficial effects of the present invention are: liquid level is obtained by liquid surface height sensor, in conjunction with the liquid level of oil liquid
The container model information obtained with input terminal calculates the volume of container inner fluid, solves Fuel Oil Remaining detection in measurement container
The technical issues of device;Again since other influence factors are not present in the volume that the liquid level by oil liquid is converted to oil liquid, because
This is solved how in precise measurement container the technical issues of Fuel Oil Remaining detection device.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the liquid surface height sensor includes pressure transducer and liquid densimeter, and the pressure transducer is used
In obtaining liquid pressure Px and being sent to the processor, the liquid densimeter is for obtaining fluid density ρ and being sent to institute
Processor is stated, the processor obtains liquid level H according to the following formula:
Px-P0=ρ gH
Wherein, P0 is atmospheric pressure, and g is acceleration of gravity.
Further, the liquid surface height sensor further includes fluid temperature sensor, and the fluid temperature sensor is used for
It obtains current oil liquid temperature T and is sent to the processor, the processor is for after obtaining temperature-compensating according to the following formula
Fluid density ρt:
ρt=ρ0+(T-T0)*γ
With the fluid density ρ after temperature-compensatingtThe calculating of liquid level H is participated in instead of fluid density ρ, wherein γ is temperature
Spend bulkfactor, T0For preset temperature, ρ0For the density of oil liquid under preset temperature.
Beneficial effect using above-mentioned further scheme is calculated compared to temperature-compensating not to be added to the scheme calculated.
Further, oil mass detection device according to claim 2, it is characterised in that: the liquid surface height sensor
It further include the first liquid pressure sensor and second liquid pressure transducer that two vertical ranges are Hp, first liquid pressure
Strong sensor and the second liquid pressure transducer are respectively positioned in container, and the first liquid pressure sensor is located at described the
The lower section of two liquid pressure sensors, the first liquid pressure sensor is for measuring pressure P1, the second liquid pressure
Sensor is for measuring pressure P2, and the processor for obtaining fluid density ρ according to the following formula:
Wherein g is acceleration of gravity.
Beneficial effect using above-mentioned further scheme is to obtain fluid density by the cooperation of two liquid sensors,
Compared to the scheme for using general density, the height of two liquid pressure sensors of this programme is fixed value, and that measures at this time is close
Degree is changed, corresponding, the liquid volume calculated using the fluid density that this programme obtains with the variation of fuel tank position
It also can be more accurate.
Further, the liquid surface height sensor further includes GPS positioning device, and the GPS positioning device is worked as obtaining
Preceding height above sea level h and place latitude θ is simultaneously sent to the processor, and the processor for obtaining current weight according to the following formula
Power acceleration g ':
G '=g0(1+a0(sinθ)2-a1(sin2θ)2)-b*h
Wherein, g0Reference acceleration value when for height above sea level h being 0, a0、a1It is calculating parameter with b;
The processor is also used to participate in liquid level with current gravity acceleration g ' replacement gravity acceleration g
The calculating of H or fluid density ρ.
Beneficial effect using above-mentioned further scheme is accelerated according to the A/W in the location of the device of this programme
Degree is changed, and is compared and is used approximate test value g=9.80665m/s2The calculated result calculated is more accurate.
Further, the first liquid pressure sensor or second liquid pressure transducer are voltage sensor, the electricity
Pressure sensor is used to obtain the voltage U of oil liquidxAnd it is sent to the processor, the processor for obtaining according to the following formula
Liquid pressure Px:
Px=P0+(Ux-U0)*k
Wherein, P0For benchmark pressure, U0It is P for pressure0When voltage value, k is voltage coefficient.
Further, the voltage sensor is for acquiring at least one voltage value VINx, controller is according to whole voltages
Value VINxObtain Vsx, the controller is also used to according to each voltage value VINxAt least one middle coefficient is obtained with following formula
kx:
Calculate all middle coefficient kxAverage value obtain voltage coefficient k, wherein VIN0For voltage sensor ground connection
When the voltage value that acquires, Vs0It is controller according to the VIN0It is calculated.
Another technical solution that the present invention solves above-mentioned technical problem is as follows: a kind of oil mass detection method, including following step
It is rapid:
S1: the liquid level of oil liquid is obtained;
S2: container model information is obtained;
S3: oil mass information is obtained according to the liquid level and the container model information.
Beneficial effect using above-mentioned further scheme is, in conjunction with liquid level and the calculated oil liquid of container model information
Volume other influence factors are not present, solve how in precise measurement container the technical issues of Fuel Oil Remaining detection device.
Further, step S1 specifically:
S11: liquid pressure Px is obtained;
S12: fluid density ρ is obtained;
S13: liquid level H is obtained according to the following formula:
Px=P0=ρ gH
Wherein, Px is liquid pressure, and ρ is fluid density, and P0 is atmospheric pressure, and g is acceleration of gravity.
Further, step S12 specifically:
S121: current oil liquid temperature is obtained;
S122: the fluid density ρ after obtaining temperature-compensating according to the following formulat:
ρt=ρ0+(T-T0)*γ
With the fluid density ρ after temperature-compensatingtThe calculating of liquid level H is participated in instead of fluid density ρ, wherein T is current
Oil liquid temperature, γ are temperature-density coefficient, T0For preset temperature, ρ0For the density of oil liquid under preset temperature.
The advantages of additional aspect of the invention, will be set forth in part in the description, and will partially become from the following description
It obtains obviously, or practice is recognized through the invention.
Further, step S12 specifically:
S1201: the first liquid pressure sensor and second liquid pressure transducer are set in container;
S1202: second liquid pressure transducer is fixed on above the first liquid pressure sensor, and the first liquid pressure
The vertical range of sensor and second liquid pressure transducer is Hp;
S1203: the pressure P1 that the first liquid pressure sensor measures and the pressure that second liquid pressure transducer measures are obtained
Strong P2;
S1204: fluid density ρ is obtained according to the following formula:
Wherein g is acceleration of gravity.
Beneficial effect using above-mentioned further scheme is to obtain fluid density by the cooperation of two liquid sensors.
Further, the obtaining step of step S13 or the g in step S1204 specifically:
S101: current altitude h and place latitude θ is obtained
S102: obtain according to the following formula current gravity acceleration g ':
G '=g0(1+a0(sinθ)2-a1(sin2θ)2)-b*h
Wherein, g0Reference acceleration value when for height above sea level h being 0, a0、a1It is calculating parameter with b.
Beneficial effect using above-mentioned further scheme is accelerated according to the A/W in the location of the device of this programme
Degree is changed, and is compared and is used approximate test value g=9.80665m/s2The calculated result calculated is more accurate.
Further, the first liquid pressure sensor in step S1203 and second liquid pressure transducer are that voltage passes
Sensor, step S1203 specifically:
S12031: the voltage sensor obtains voltage Ux;
S12032: liquid pressure Px is obtained according to the following formula:
Px=P0+(Ux-U0)*k
Wherein, P0For benchmark pressure, U0It is P for pressure0When voltage value, k is voltage coefficient;
S12033: the first voltage that the first liquid pressure sensor is obtained repeats step S12031 and step as Ux
Rapid S12031 obtains pressure P1, and the second voltage that the second liquid pressure transducer is obtained repeats step S12031 as Ux
Pressure P2 is obtained with step S12031.
Further, step S12032 specifically:
S120321: the voltage sensor obtains at least one voltage value VINx;
S120322: according to the voltage value VINxObtain Vsx;
S120323: according to each voltage value VINxAt least one middle coefficient k is obtained with following formulax:
Wherein, VIN0For the voltage value acquired when voltage sensor ground connection, Vs0It is controller according to the VIN0It is calculated;
S120324: all middle coefficient k are calculatedxAverage value obtain voltage coefficient k;
S120325: liquid pressure Px is obtained according to the following formula:
Px=P0+(Ux-U0)*k
Wherein, P0For benchmark pressure, U0It is P for pressure0When voltage value, k is voltage coefficient.
Detailed description of the invention
Fig. 1 is the block schematic illustration of the embodiment of oil mass detection device of the present invention;
Fig. 2 is the flow chart of the other embodiments of oil mass detection method of the present invention.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Embodiment is substantially as shown in Fig. 1:
Oil mass detection device in the present embodiment, comprising: information input terminal 1, liquid surface height sensor 2 and processor 3, this reality
The information input terminal 1 applied in example can be JAPMC-IO2303-E input module, and liquid surface height sensor 2 can be DMK351 liquid
Level sensor, processor 3 can be STC12C5A60S2 single-chip microcontroller;The liquid level that liquid surface height sensor 2 is used to obtain oil liquid is high
Processor 3 is spent and is sent to, for obtaining container model information and being sent to processor 3, processor 3 is used for information input terminal 1
Oil mass information is obtained according to liquid level and container model information.
In the present solution, processor 3 carries out dropping cut slice to container model information, the volume after recording slice every time, then
The tables of data for establishing container model corresponding volume under different height obtains remaining liq further according to liquid level and tables of data
Volume, i.e. oil mass information, the oil mass detection device in the present embodiment survey oil mass by the liquid level thus according to oil liquid
Amount, therefore it is also applied for the measurement of surplus of other liquid in container.
Optionally, in some other embodiments, liquid surface height sensor 2 includes pressure transducer and liquid densimeter,
Pressure transducer in the present embodiment can be MPXV5050GP gauge pressure transducer, and liquid densimeter can pass for TQ-880 density
Sensor;Pressure transducer is for obtaining liquid pressure Px and being sent to processor 3, and liquid densimeter is for obtaining fluid density ρ
And it is sent to processor 3, processor 3 obtains liquid level H according to the following formula:
Px-P0=ρ gH
Wherein, P0 is atmospheric pressure, and g is acceleration of gravity.
Optionally, in some other embodiments, liquid surface height sensor 2 can also include fluid temperature sensor, this
Fluid temperature sensor in embodiment can be WSSF-316 thermometer;Fluid temperature sensor is for obtaining current oil liquid temperature
Degree T is simultaneously sent to processor 3, and processor 3 for obtaining the fluid density ρ after temperature-compensating according to the following formulat:
ρt=ρ0+(T-T0)*γ
With the fluid density ρ after temperature-compensatingtThe calculating of liquid level H is participated in instead of fluid density ρ, wherein γ is temperature
Spend bulkfactor, T0For preset temperature, ρ0For the density of oil liquid under preset temperature.
It is accurately calculated compared to the scheme calculated not being added in temperature-compensating.
Optionally, in some other embodiments, it is Hp's that liquid surface height sensor 2, which can also include two vertical ranges,
First liquid pressure sensor and second liquid pressure transducer, the first liquid pressure sensor and the second liquid in the present embodiment
Body pressure transducer all can be MPXV5050GP gauge pressure transducer;First liquid pressure sensor and second liquid pressure sensing
Device is respectively positioned in container, and the first liquid pressure sensor is located at the lower section of second liquid pressure transducer, and the first liquid pressure passes
Sensor is for measuring pressure P1, and second liquid pressure transducer is for measuring pressure P2, and processor 3 for obtaining according to the following formula
Take fluid density ρ:
Wherein g is acceleration of gravity.
Fluid density is obtained by the cooperation of two liquid sensors, compared to the scheme for using general density, this programme
The height of two liquid pressure sensors is fixed value, and the density measured at this time changes with the variation of fuel tank position, corresponding
, the liquid volume calculated using the fluid density that this programme obtains also can be more accurate.
Optionally, in some other embodiments, liquid surface height sensor 2 can also include GPS positioning device, and GPS is fixed
Position device is for obtaining current altitude h and place latitude θ and being sent to processor 3, and processor 3 is for according to the following formula
Obtain current gravity acceleration g ':
G '=g0(1+a0(sinθ)2-a1(sin2θ)2)-b*h
Wherein, g0Reference acceleration value when for height above sea level h being 0, a0、a1It is calculating parameter with b, in the present embodiment
Three calculating parameters are specifically as follows: a0=0.0052884, a1=0.0000059, b=0.00000286;
Processor 3 is also used to participate in liquid level H or fluid density with current gravity acceleration g ' replacement gravity acceleration g
The calculating of ρ.
It is changed according to the A/W acceleration in the location of the device of this programme, compares and use approximate test value g
=9.80665m/s2The calculated result calculated is more accurate.
Optionally, in some other embodiments, liquid pressure sensor is voltage sensor, the voltage in the present embodiment
Sensor can carry AD for STC12C5A60S2 single-chip microcontroller, and voltage sensor is used to obtain the voltage U of oil liquidxAnd it is sent to place
Device 3 is managed, processor 3 for obtaining liquid pressure Px according to the following formula:
Px=P0+(Ux-U0)*k
Wherein, P0For benchmark pressure, U0It is P for pressure0When voltage value, k is voltage coefficient.
Optionally, in some other embodiments, voltage sensor is for acquiring at least one voltage value VINx, this implementation
10 voltage value V can be acquired in exampleINx;Controller is according to whole voltage value VINxObtain Vsx, in the present embodiment, controller according to
Following formula obtains Vsx:
Vsx=AD sample/AD max*Vref
Wherein, AD sample is controller according to VINxThe real-time sampling value obtained after analog-to-digital conversion is carried out, AD max is
The maximum sampled value of controller, the maximum sampled value in the present embodiment can be 2^24=16777216.
Controller is also used to according to each voltage value VINxAt least one middle coefficient k is obtained with following formulax:
Calculate whole middle coefficient kxAverage value obtain voltage coefficient k, wherein VIN0To be adopted when voltage sensor ground connection
The voltage value of collection, Vs0It is controller according to VIN0It is calculated.
Optionally, as shown in Fig. 2, in some other embodiments, the present invention also provides a kind of oil mass detection methods, including
Following steps:
S1: the liquid level of oil liquid is obtained;
S2: container model information is obtained;
S3: oil mass information is obtained according to liquid level and container model information.
Other influence factors are not present in conjunction with the volume of liquid level and the calculated oil liquid of container model information, solve
How in precise measurement container the technical issues of Fuel Oil Remaining detection device.
Optionally, in some other embodiments, step S1 specifically:
S11: liquid pressure Px is obtained;
S12: fluid density ρ is obtained;
S13: liquid level H is obtained according to the following formula:
Px-P0=ρ gH
Wherein, Px is liquid pressure, and ρ is fluid density, and P0 is atmospheric pressure, and g is acceleration of gravity.
Optionally, in some other embodiments, step S12 specifically:
S121: current oil liquid temperature is obtained;
S122: the fluid density ρ after obtaining temperature-compensating according to the following formulat:
ρt=ρ0+(T-T0)*γ
With the fluid density ρ after temperature-compensatingtThe calculating of liquid level H is participated in instead of fluid density ρ, wherein T is current
Oil liquid temperature, γ are temperature-density coefficient, T0For preset temperature, ρ0For the density of oil liquid under preset temperature.
Optionally, in some other embodiments, step S12 specifically:
S1201: the first liquid pressure sensor and second liquid pressure transducer are set in container;
S1202: second liquid pressure transducer is fixed on above the first liquid pressure sensor, and the first liquid pressure
The vertical range of sensor and second liquid pressure transducer is Hp;
S1203: the pressure P1 that the first liquid pressure sensor measures and the pressure that second liquid pressure transducer measures are obtained
Strong P2;
S1204: fluid density ρ is obtained according to the following formula:
Wherein g is acceleration of gravity.
Fluid density is obtained by the cooperation of two liquid sensors.
Optionally, in some other embodiments, the obtaining step of step S13 or the g in step S1204 specifically:
S101: current altitude h and place latitude θ is obtained
S102: obtain according to the following formula current gravity acceleration g ':
G '=g0(1+a0(sinθ)2-a1(sin2θ)2)-b*h
Wherein, g0Reference acceleration value when for height above sea level h being 0, a0、a1It is calculating parameter with b.
It is changed according to the A/W acceleration in the location of the device of this programme, compares and use approximate test value g
=9.80665m/s2The calculated result calculated is more accurate.
Optionally, in some other embodiments, the first liquid pressure sensor and second liquid pressure in step S1203
Strong sensor is voltage sensor, step S1203 specifically:
S12031: the voltage sensor obtains voltage Ux;
S12032: liquid pressure Px is obtained according to the following formula:
Px=P0+(Ux-U0)*k
Wherein, P0For benchmark pressure, U0It is P for pressure0When voltage value, k is voltage coefficient;
S12033: the first voltage that the first liquid pressure sensor is obtained repeats step S12031 and step as Ux
Rapid S12031 obtains pressure P1, and the second voltage that the second liquid pressure transducer is obtained repeats step S12031 as Ux
Pressure P2 is obtained with step S12031.
Optionally, in some other embodiments, step S12032 specifically:
S120321: the voltage sensor obtains at least one voltage value VINx;
S120322: according to the voltage value VINxObtain Vsx;
S120323: according to each voltage value VINxAt least one middle coefficient k is obtained with following formulax:
Wherein, VIN0For the voltage value acquired when voltage sensor ground connection, Vs0It is controller according to the VIN0It is calculated;
S120324: all middle coefficient k are calculatedxAverage value obtain voltage coefficient k;
S120325: liquid pressure Px is obtained according to the following formula:
Px=P0+(Ux-U0)*k
Wherein, P0For benchmark pressure, U0It is P for pressure0When voltage value, k is voltage coefficient.
It should be noted that the various embodiments described above are product embodiments corresponding with above-mentioned each method embodiment, for this
In embodiment the explanation of each constructional device and optional embodiment can with reference in above-mentioned each method embodiment pair it should be noted that
This is repeated no more.
Reader should be understood that in the description of this specification reference term " one embodiment ", " is shown " some embodiments "
The description of example ", " specific example " or " some examples " etc. mean specific features described in conjunction with this embodiment or example, structure,
Material or feature are included at least one embodiment or example of the invention.In the present specification, above-mentioned term is shown
The statement of meaning property need not be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described
It may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this
The technical staff in field can be by the spy of different embodiments or examples described in this specification and different embodiments or examples
Sign is combined.
It is apparent to those skilled in the art that for convenience of description and succinctly, the dress of foregoing description
The specific work process with unit is set, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
More than, only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions,
These modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of oil mass detection device characterized by comprising information input terminal, liquid surface height sensor and processor, it is described
Liquid surface height sensor is used to obtain the liquid level of oil liquid and is sent to the processor, and the information input terminal is for obtaining
Container model information is simultaneously sent to the processor, and the processor is used to be believed according to the liquid level and the container model
Breath obtains oil mass information.
2. oil mass detection device according to claim 1, it is characterised in that: the liquid surface height sensor includes that pressure passes
Sensor and liquid densimeter, the pressure transducer is for obtaining liquid pressure Px and being sent to the processor, the liquid
For densitometer for obtaining fluid density ρ and being sent to the processor, the processor obtains liquid level according to the following formula
H:
Px-P0=ρ gH
Wherein, P0 is atmospheric pressure, and g is acceleration of gravity.
3. oil mass detection device according to claim 2, it is characterised in that: the liquid surface height sensor further includes liquid
Temperature sensor, the fluid temperature sensor is for obtaining current oil liquid temperature T and being sent to the processor, the processing
Device for obtaining the fluid density ρ after temperature-compensating according to the following formulat:
ρt=ρ0+(T-T0)*γ
With the fluid density ρ after temperature-compensatingtThe calculating of liquid level H is participated in instead of fluid density ρ, wherein γ is temperature-density
Coefficient, T0For preset temperature, ρ0For the density of oil liquid under preset temperature.
4. oil mass detection device according to claim 2, it is characterised in that: the liquid surface height sensor further includes two
Vertical range be Hp the first liquid pressure sensor and second liquid pressure transducer, the first liquid pressure sensor with
The second liquid pressure transducer is respectively positioned in container, and the first liquid pressure sensor is located at the second liquid pressure
The lower section of sensor, for measuring pressure P1, the second liquid pressure transducer is used for the first liquid pressure sensor
Pressure P2 is measured, the processor for obtaining the fluid density ρ of oil liquid according to the following formula:
Wherein g is acceleration of gravity.
5. oil mass detection device according to any one of claim 2 to 4, it is characterised in that: the liquid level sensing
Device further includes GPS positioning device, and the GPS positioning device is for obtaining current altitude h and place latitude θ and being sent to institute
State processor, the processor for obtain according to the following formula current gravity acceleration g ':
G '=g0(1+a0(sinθ)2-a1(sin2θ)2)-b*h
Wherein, g0Reference acceleration value when for height above sea level h being 0, a0、a1It is calculating parameter with b;
The processor be also used to be participated in the current gravity acceleration g ' replacement gravity acceleration g liquid level H or
The calculating of fluid density ρ.
6. oil mass detection device according to claim 4, it is characterised in that: the first liquid pressure sensor and second
Liquid pressure sensor is voltage sensor, and the voltage sensor is used to obtain the voltage U of oil liquidxAnd it is sent to the place
Device is managed, the processor for obtaining liquid pressure Px according to the following formula:
Px=P0+(Ux-U0)*k
Wherein, P0For benchmark pressure, U0It is P for pressure0When voltage value, k is voltage coefficient.
7. oil mass detection device according to claim 6, it is characterised in that: the voltage sensor is for acquiring at least one
A voltage value VINx, controller is according to whole voltage value VINxObtain Vsx, the controller is also used to according to each voltage value
VINxAt least one middle coefficient k is obtained with following formulax:
Calculate all middle coefficient kxAverage value obtain voltage coefficient k, wherein VIN0To be acquired when voltage sensor ground connection
Voltage value, Vs0It is controller according to the VIN0It is calculated.
8. a kind of oil mass detection method, it is characterised in that: the following steps are included:
S1: the liquid level of oil liquid is obtained;
S2: container model information is obtained;
S3: oil mass information is obtained according to the liquid level and the container model information.
9. oil mass detection method according to claim 8, it is characterised in that: step S1 specifically:
S11: liquid pressure Px is obtained;
S12: fluid density ρ is obtained;
S13: liquid level H is obtained according to the following formula:
Px-P0=ρ gH
Wherein, Px is liquid pressure, and ρ is fluid density, and P0 is atmospheric pressure, and g is acceleration of gravity.
10. oil mass detection method according to claim 9, it is characterised in that: step S12 specifically:
S121: current oil liquid temperature is obtained;
S122: the fluid density ρ after obtaining temperature-compensating according to the following formulat:
ρt=ρ0+(T-T0)*γ
With the fluid density ρ after temperature-compensatingtThe calculating of liquid level H is participated in instead of fluid density ρ, wherein T is current oil liquid
Temperature, γ are temperature-density coefficient, T0For preset temperature, ρ0For the density of oil liquid under preset temperature.
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CN112284481A (en) * | 2020-10-29 | 2021-01-29 | 重庆运点点物流科技有限公司 | Fuel quantity monitoring system and method for ship oil tank |
CN115977193A (en) * | 2023-01-11 | 2023-04-18 | 广州华欣液压科技股份有限公司 | Rotary motor device of excavator |
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Application publication date: 20190416 |