CN103674772A - Temperature compensation method for diesel oil density - Google Patents
Temperature compensation method for diesel oil density Download PDFInfo
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- CN103674772A CN103674772A CN201310625796.5A CN201310625796A CN103674772A CN 103674772 A CN103674772 A CN 103674772A CN 201310625796 A CN201310625796 A CN 201310625796A CN 103674772 A CN103674772 A CN 103674772A
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- density
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- diesel oil
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Abstract
The invention discloses a temperature compensation method for the diesel oil density. Equipment in the method comprises a temperature sensor acquisition module, a single chip processing module, a communication module and a PC (personal computer), wherein the temperature sensor acquisition module is capable of measuring the diesel oil temperature and comprises a temperature sensor used for measuring the diesel oil temperature; the single chip processing module is capable of receiving a temperature signal transmitted from the temperature sensor acquisition module and making a calculation, and mainly comprises a single chip used for calculating the diesel oil density; the temperature sensor is in communication connection with the single chip through a single bus; the communication module is connected with the single chip processing module and is capable of outputting a calculation result and a signal of the diesel oil density calculated by the single chip; the PC is in communication connection with the communication module through a USB (universal serial bus) port; the standard density calculated by the single chip and the density under the current temperature are output to the PC. Due to the application of the method, the density can be subjected to temperature compensation and the standard density can be obtained conveniently in a single chip measurement system, the storage space is reduced, and the lookup and calculation time are shortened.
Description
Technical field
The present invention relates to fuel measurement technical field, be specifically related to a kind of temperature compensation of diesel oil density.
Background technology
From the < < beeliner fuel management way > > of Ministry of Railways's issue in 5 days June nineteen ninety, can find out, the sampling of locomotive fuel oil and density calculation are carried out according to " oil and liquid petroleum product ".In other words, locomotive fuel oil belongs to " oil and liquid petroleum product ".
According to State Standard of the People's Republic of China < < petroleum meter scale > > GB/T1885-1998, for " crude oil, lubricating oil and other liquid petroleum product ", must first the pseudodensity at a certain temperature be converted into standard density, again according to standard density, converse the volume correction factor that is adapted to standard volume, the locomotive fuel oil volume of different temperatures different densities could be converted into standard volume like this.
The 16th regulation of < < beeliner fuel management way > >: for reaching the accurately reasonable of fuel distribution density, set up density measurement system.Fuel metering person answers every day to the density measurement of granting oil tank once, charge to " fuel density detection book " (iron oil 10), and try to achieve the mean value of the fuel distribution density whole month, as next month provide density with reference to foundation, also should consider temperature Change and the trade mark change factor of next month, by heating power technician, person on duty, gauger, jointly determine density, fill in " fuel distribution density is adjusted advice note " (iron oil 11), forbid to adjust density to carry out balance profit and loss.
This regulation shows that fuel density is very large on the economic benefit impact of railway interests, and due to the backwardness of detection means, can only be to " every day be to the density measurement of providing oil tank once ", and " and try to achieve the mean value of the fuel distribution density whole month, as next month provide density with reference to according to ".The present invention can measure temperature and the density of each locomotive in real time, reaches the object of " forbidding to adjust density to carry out balance profit and loss " by technological means.
As the patent that the patent No. is 201110173924.8, a kind of Optical Fiber Vortex-Shedding Flowmeter that can simultaneously measure temperature, density is disclosed; The patent No. is 201110180191.0, discloses a kind of integrated fluid sensor of measuring fluid density, pressure and temperature based on MEMS technology time; The patent No. is 201210240485.2 to disclose a kind of high-precision liquid level, temperature, density multifunctional measuring system; The patent No. is 91216649.5 to disclose a kind of temp. densimeter for liquid sampling; By these patent retrievals, obtain a result, do not reflect the mathematical relation that the density at the temperature that measures and this temperature exists.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of can carry out temperature compensation and obtain standard density density easily in measure system based on MCU, has reduced storage space and has tabled look-up and the temperature compensation of the diesel oil density of computing time.
Technical matters to be solved by this invention realizes by the following technical solutions:
A temperature compensation for diesel oil density, comprises,
Can measure the temperature sensor acquisition module of diesel fuel temperature, this temperature sensor acquisition module comprises temperature sensor, described temperature sensor is used for measuring diesel fuel temperature, and described temperature sensor adopts sensor with data readout AD converter analog quantity to be converted to the sensor of digital quantity;
Can receive the go forward side by side single chip processing module of row operation of temperature signal that temperature sensor acquisition module transmits, this single chip processing module mainly comprises a single-chip microcomputer, be used for calculating diesel oil density, described temperature sensor is connected with microcontroller communication by data line or AD converter;
Be connected with single chip processing module, and can export the communication module of result of calculation, the diesel oil density signal that this communication module is calculated single-chip microcomputer is exported.
Single-chip microcomputer calculates diesel oil density, wherein temperature unit by following computing method: ℃; Density unit: kg/m
3):
Suppose, for 20 ℃ of density p
20(being standard density) is at 807-881kg/m
3the diesel oil of scope, the density p (t) under in temperature t (20-60) scope and the available following formula of the relation of temperature t are described: compare error≤1kg/m with data 1
3
ρ (t)=-0.69*t+ ρ 20+13.8 formula 1
Diesel oil density p (t) under known a certain temperature t (20-60), can calculate standard density ρ
20
ρ
20=ρ (t)+0.69*t – 13.8 formula 2
Known to t(-20≤t≤60) to record density at temperature be ρ t, the density p under arbitrary temperature T (20≤T≤60) can be calculated as follows
ρ(T)=-0.69T+ρt+0.69t
=0.69(t – T)+ρ t formula 3.
Data 1 is calculated quickly and is shown standard of petroleum product density meter > > oil static state and lighter hydrocarbons measurement standard specified administrative department volume for the metering of < < petroleum products, China Standard Press publishes in September, 2005, and this is main reference frame of the present invention.
The invention has the beneficial effects as follows:
1) diesel oil density changes along with temperature variation, uses the present invention, can in measure system based on MCU, carry out temperature compensation and obtain standard density easily to density, has reduced storage space and has tabled look-up and computing time.
2) in data 1, temperature range-20-60 ℃, standard density is at 807-881kg/m
3nearly 90 pages of the contents of scope, if form stores in the storer of single-chip microcomputer, at least need 90K byte.And this table is not the bivariate table of a standard, Electronic saving and the single-chip microcomputer more complicated of tabling look-up, the present invention does not need to store table content.
3) even if stored the form in data 1, for the numerical value that can not directly find, also need interpolation calculation, the present invention only needs a simple computation just can.
Accompanying drawing explanation
Fig. 1 is system block diagram of the present invention;
Fig. 2 is single-chip microcomputer FB(flow block) of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
A temperature compensation for diesel oil density, comprises,
Can measure the temperature sensor acquisition module of diesel fuel temperature, this temperature sensor acquisition module comprises temperature sensor, described temperature sensor is used for measuring diesel fuel temperature, and described temperature sensor adopts sensor with data readout or by AD converter, analog quantity converted to the sensor of digital quantity;
Can receive the go forward side by side single chip processing module of row operation of temperature signal that temperature sensor acquisition module transmits, this single chip processing module mainly comprises a single-chip microcomputer, and for calculating diesel oil density, described temperature sensor is connected with microcontroller communication by unibus;
Be connected with single chip processing module, and can export the communication module of result of calculation, the diesel oil density signal that this communication module is calculated single-chip microcomputer is exported;
With the PC that communication module is connected by the communication of USB mouth, the standard density that single-chip microcomputer is calculated and the density under Current Temperatures output to PC.
System connects according to Fig. 1, and temperature sensor is selected DS18B20, and by unibus and microcontroller communication, single-chip microcomputer is selected Atmega8, and communication module is selected CH340T, and PC (computing machine) is by the communication of USB mouth.The fuel density ρ t of this fuel tank and relevant temperature t are by computer installation in single-chip microcomputer, and single-chip microcomputer, according to the works of Fig. 2, outputs to computing machine by the density under standard density and Current Temperatures.
Described single-chip microcomputer calculates fuel density, wherein temperature unit by following computing method: ℃; Density unit: kg/m
3):
Suppose, for 20 ℃ of density p
20(being standard density) is at 807-881kg/m
3the diesel oil of scope, the density p (t) under in temperature t (20-60) scope and the available following formula of the relation of temperature t are described: (compare error≤1kg/m with data 1
3)
ρ (t)=-0.69*t+ ρ 20+13.8 formula 1
Fuel density ρ (t) under known a certain temperature t (20-60), can calculate standard density ρ
20
ρ
20=ρ (t)+0.69*t – 13.8 formula 2
Known to t(-20≤t≤60) to record density at temperature be ρ t, the density p under arbitrary temperature T (20≤T≤60) can be calculated as follows
ρ(T)=-0.69T+ρt+0.69t
=0.69(t – T)+ρ t formula 3.
Data 1 is calculated quickly and is shown standard of petroleum product density meter > > oil static state and lighter hydrocarbons measurement standard specified administrative department volume for the metering of < < petroleum products, China Standard Press publishes in September, 2005, and this is main reference frame of the present invention.
Checking for example:
Give an example 1:
The density that diesel oil in known fuel tank records in the time of 20 ℃ is 807kg/m
3, temperature sensor records 6 ℃ of Current Temperatures, according to data 1 standard pseudodensity in the time can finding at 6 ℃ for the 177th page, is 807kg/m
3, corresponding density is 817kg/m
3, according to formula 1, calculate ρ (6)=-0.69*6+807+13.8=816.66, compare error 0.34kg/m with tabling look-up
3.
Give an example 2:
It is 901kg/m that diesel oil in known fuel tank records density at-10 ℃
3, according to data 1, at the 258th page, check in standard density (20 ℃ time density) for 880.8kg/m
3, at the 233rd page, checking in standard density 880.4 is 853 the pseudodensity of 60 ℃, and standard density 882.4 is 855 the pseudodensity of 60 ℃, by the requirement of data 1, carries out difference calculating, and obtaining standard density and be 880.8 is 853.4 the pseudodensity of 60 ℃.
According to formula 2, ρ
20=901+0.69*(-10) – 13.8=880.3, compares error 0.5kg/m with tabling look-up
3.
According to formula 3, ρ (60)=0.69* (10-60)+901=852.7, compares error 0.7kg/m with tabling look-up
3.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. a temperature compensation for diesel oil density, is characterized in that: comprises,
Can measure the temperature sensor acquisition module of diesel fuel temperature, this temperature sensor acquisition module comprises temperature sensor, and described temperature sensor is used for measuring diesel fuel temperature;
Can receive the go forward side by side single chip processing module of row operation of temperature signal that temperature sensor acquisition module transmits, this single chip processing module mainly comprises a single-chip microcomputer, be used for calculating diesel oil density, described temperature sensor is connected with microcontroller communication by data line or AD converter;
Be connected with single chip processing module, and can export the communication module of result of calculation, the diesel oil density signal that this communication module is calculated single-chip microcomputer is exported.
2. the temperature compensation of diesel oil density according to claim 1, is characterized in that: single-chip microcomputer calculates diesel oil density, wherein temperature unit by following computing method: ℃; Density unit: kg/m
3):
Suppose, for 20 ℃ of density p
20, i.e. standard density, at 807-881kg/m
3the diesel oil of scope, the density p (t) under in temperature t (20-60) scope and the available following formula of the relation of temperature t are described:
ρ (t)=-0.69*t+13.8 formula 1
Diesel oil density p (t) under known a certain temperature t (20-60), can calculate standard density ρ
20
ρ
20=ρ (t)+0.69*t – 13.8 formula 2
The density p under arbitrary temperature T (20≤T≤60) can be calculated as follows
ρ(T)=-0.69T+ρt+0.69t
=0.69(t – T)+ρ t formula 3.
3. the temperature compensation of diesel oil density according to claim 1, is characterized in that: described temperature sensor adopts sensor with data readout AD converter analog quantity to be converted to the sensor of digital quantity.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675436A (en) * | 2016-01-07 | 2016-06-15 | 安徽华润金蟾药业股份有限公司 | Cinobufagin single-effect concentration process density detecting system and method |
| CN110146411A (en) * | 2019-05-06 | 2019-08-20 | 湖北锂诺新能源科技有限公司 | A kind of method of on-line measurement lithium battery slurry viscosity |
| CN111380776A (en) * | 2018-12-27 | 2020-07-07 | 中国石油天然气股份有限公司 | Method and device for determining density of crude oil in stratum |
| CN112525289A (en) * | 2019-09-19 | 2021-03-19 | 北京昊科航科技有限责任公司 | Liquid storage tank section measuring instrument |
| CN114689460A (en) * | 2022-06-01 | 2022-07-01 | 西北大学 | Crude oil density value correction method for online density automatic measurement |
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| JPH08159944A (en) * | 1994-12-06 | 1996-06-21 | Kyoto Electron Mfg Co Ltd | Method for temperature compensation of physical quantity of fluid |
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Patent Citations (3)
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| JPH08159944A (en) * | 1994-12-06 | 1996-06-21 | Kyoto Electron Mfg Co Ltd | Method for temperature compensation of physical quantity of fluid |
| CN1447106A (en) * | 2003-04-21 | 2003-10-08 | 李兴伟 | Online portable multi-functional intellgence fluid density meters |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675436A (en) * | 2016-01-07 | 2016-06-15 | 安徽华润金蟾药业股份有限公司 | Cinobufagin single-effect concentration process density detecting system and method |
| CN111380776A (en) * | 2018-12-27 | 2020-07-07 | 中国石油天然气股份有限公司 | Method and device for determining density of crude oil in stratum |
| CN110146411A (en) * | 2019-05-06 | 2019-08-20 | 湖北锂诺新能源科技有限公司 | A kind of method of on-line measurement lithium battery slurry viscosity |
| CN112525289A (en) * | 2019-09-19 | 2021-03-19 | 北京昊科航科技有限责任公司 | Liquid storage tank section measuring instrument |
| CN114689460A (en) * | 2022-06-01 | 2022-07-01 | 西北大学 | Crude oil density value correction method for online density automatic measurement |
| CN114689460B (en) * | 2022-06-01 | 2022-08-23 | 西北大学 | Crude oil density value correction method for online density automatic measurement |
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| CN103674772B (en) | 2015-10-28 |
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Effective date of registration: 20190104 Address after: 225300 Pearl River Road, Yongan Town, Taizhou, Jiangsu Province, 108 Patentee after: Li Wenkang Address before: 102600 3 floor, 2 building, No. 4 Daxing District Garden Road, Beijing, 1 unit 317 Patentee before: BEIJING ZHITOUJIA INTELLECTUAL PROPERTY OPERATION CO.,LTD. Effective date of registration: 20190104 Address after: 102600 3 floor, 2 building, No. 4 Daxing District Garden Road, Beijing, 1 unit 317 Patentee after: BEIJING ZHITOUJIA INTELLECTUAL PROPERTY OPERATION CO.,LTD. Address before: 233000 4th Floor, Block C, Incubation Base Building, 7829 Huangshan Avenue, Bengbu City, Anhui Province Patentee before: Anhui Qiutian Electronics Co.,Ltd. |
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Address after: 210000 No. 128 Shanxi Road, Gulou District, Nanjing City, Jiangsu Province Patentee after: Li Wenkang Address before: 225300 No. 108 Mingzhu Avenue, Yonganzhou Town, Gaogang District, Taizhou City, Jiangsu Province Patentee before: Li Wenkang |
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Address after: Room 102, unit 1, building 10, Wenjin garden, Huajin South Road, Yijiang District, Wuhu City, Anhui Province 241000 Patentee after: Li Wenkang Address before: 210000 No. 128 Shanxi Road, Gulou District, Nanjing City, Jiangsu Province Patentee before: Li Wenkang |