CN102128648B - Method for measuring engine fuel by intelligent acceleration sensor - Google Patents
Method for measuring engine fuel by intelligent acceleration sensor Download PDFInfo
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- CN102128648B CN102128648B CN2011100089492A CN201110008949A CN102128648B CN 102128648 B CN102128648 B CN 102128648B CN 2011100089492 A CN2011100089492 A CN 2011100089492A CN 201110008949 A CN201110008949 A CN 201110008949A CN 102128648 B CN102128648 B CN 102128648B
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- acceleration
- fuel
- signal
- fuel oil
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Abstract
The invention discloses an intelligent acceleration sensor and method for measuring engine fuel. The sensor comprises a vortex street flowmeter, a signal connector, a signal amplifier, a microcomputer, a database system, and the like. The intelligent acceleration sensor can measure the fuel acceleration by measuring flow signals and fitting curves, thereby being applied to monitoring a fuel fluctuation situation. The vortex street flowmeter measures instantaneous flow and the signal connector samples flow signals in the sampling period. The filtering amplifying process is carried out on flow signals by the signal amplifier. The flow and the flow speed are in direct ratio, the first derivative of the flow is acceleration. The flow and the acceleration can be obtained through the process of the database system and the microcomputer. The corresponding relationship between the flow and the acceleration can be fit by smooth curves to obtain a fitting polynomial. Thus, the flow of the measurement every time can be accelerated according to the fitting polynomial. The invention can be used for detecting the fluctuation situation of the to-be-detected engine fuel, and has the advantages of stable performance, high precision, convenience in use, and the like.
Description
Technical field
The present invention relates to the engine fuel intelligent sensor technology, relate in particular to a kind of acceleration intelligence sensor and measuring method thereof of measuring engine fuel.
Background technology
At present, fuel engines is in different working conditions and under unusual operating mode, and engine oil tube intermediate fuel oil flow condition can change, and the sensor of measuring the engine oil tube intermediate fuel oil usually has flow sensor, temperature, pressure flow integrated transducer etc.
Measure fuel flow transducer: fuel flow transducer is meant the fuel passage Fluid Volume of flowing through in the unit interval.Unit interval is led to the volume of the fluid of a certain xsect in the flow tube, is called the volumetric flow rate of this xsect., Fluid Volume is called volumetric flow rate when representing with volume; When Fluid Volume is called mass rate during with quality representation.Flow sensor can show instantaneous delivery, integrated flux etc. on the spot.
Temperature, pressure flow integrated transducer: this integrated transducer has temperature, pressure and the flow that temperature, pressure transducer can directly be measured the fuel oil medium.
But the sensor can not reflect the fluctuation status of fuel oil in oil pipe.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of acceleration intelligence sensor that can in time reflect the measurement engine fuel of engine fuel fluctuation situation is provided.
Another object of the present invention is to provide the measuring method of the acceleration intelligence sensor of above-mentioned measurement engine fuel.
The present invention realizes through following technical proposals:
A kind of acceleration intelligence sensor of measuring engine fuel comprises the vortex shedding flow meter, signal picker, signal amplifier, microcomputer, the intelligence instrument that connect successively.
Said microcomputer is connected with Database Systems, control panel.
The measuring method of the acceleration intelligence sensor of above-mentioned measurement engine fuel comprises the steps:
(1), the vortex shedding flow meter measurement is installed in the engine oil tube flow signal of measurement fuel oil;
(2), signal picker gathers the flow signal of fuel oil in the sampling period, with the fuel flow signal Q that collects
1, Q
2Q
iQ
nThrough signal amplifier signal is amplified, handle through microcomputer, and be stored in the Database Systems;
(3) microcomputer is handled flow velocity and the acceleration that the fuel flow signal obtains fuel oil, and is specific as follows:
There are the relation of confirming in flow and measured flow velocity, acceleration, flow is directly proportional with flow velocity, and the first order derivative of flow is an acceleration;
Flow signal and the corresponding relation between flow velocity, flow and the acceleration of sampling is again according to the flow velocity of fuel oil
Be flow and coefficient
Product obtain the flow velocity of fuel oil; Coefficient
Be the inverse that fuel oil flows through the cross-sectional area of flowmeter,, set,, obtain flow velocity V through the calculation process of microcomputer through Database Systems according to the model of flowmeter
1, V
2V
iV
n, according to the fuel oil acceleration
Be flow differential again with coefficient
Product, try to achieve the acceleration a of fuel oil
1, a
2A
iA
n, acceleration a
1, a
2A
iA
nLeave in the Database Systems;
(4), curve fitting: utilize Database Systems with flow Q
1, Q
2Q
iQ
nWith acceleration a
1, a
2A
iA
nParameter is carried out match; Describe with smooth continuous curve, i.e. a=f (Q), the number of times of match is many more; The precision of polynomial f (Q) is high more; These matched curves are kept in the Database Systems, and each fuel flow constantly obtains acceleration according to these curves a=f (Q), promptly obtain acceleration according to each flow of measuring.
The said sampling period of above-mentioned steps (2) was generally 1～3 second.
Beneficial effect compared with prior art of the present invention is:
(1) both acceleration of energy measurement fuel oil of the present invention is gone back the flow velocity and the flow of energy measurement fuel oil, has realized the measurement of complex parameter, and acceleration can in time reflect the fluctuation situation of fuel oil.
(2) Database Systems of the present invention can be stored a large amount of historical datas, can carry out complicated digital computation, and can proofread and correct, and have the access facility of measurement data.
(3) technological means of the present invention is simple and easy to do, and measuring accuracy is high, easy to utilize.
Description of drawings
Fig. 1 measures the structural representation of the acceleration intelligence sensor of engine fuel for the present invention.
Fig. 2 measures the acceleration intelligence sensor measuring method schematic flow sheet of engine fuel for the present invention.
Embodiment
Below in conjunction with specific embodiment the present invention is done further concrete detailed description the in detail, but embodiment of the present invention is not limited thereto, the technological parameter for not indicating especially can carry out with reference to routine techniques.
Embodiment
As shown in Figure 1, the present invention measures the acceleration intelligence sensor of engine fuel, has comprised the vortex shedding flow meter, signal picker, signal amplifier, microcomputer, the intelligence instrument that connect successively.Microcomputer is connected with Database Systems, control panel.
The above-mentioned data base set intelligence instrument of unifying is used to measure the acceleration of engine fuel.
Vortex shedding flow meter is installed in the engine oil tube, measures the instantaneous delivery of fuel oil, and signal picker is sampled in the sampling period to flow signal; Signal amplifier amplifies and Filtering Processing flow signal, and microcomputer can carry out functional operation to data to be handled, and control panel and microcomputer link; Control panel carries out function selecting and measurement range selection, can realize measuring the selection of passage, and establishing of sampling rate and sampling number has limiting, the adjustment data processing method of related parameter, and select display mode etc.Because the parameter of each point changes different, the level of the signal of intelligence sensor output possibly differ greatly, can a shared programmable gain amplifier, and make every road signal be amplified to suitable amplitude, thereby improve measuring accuracy.In the microcomputer, also comprise processing to stochastic error.Replace hardware filtering through digital filtering, promptly reduce the proportion of interference in signal through operation program.
As shown in Figure 2, the measuring method of the acceleration intelligence sensor of above-mentioned measurement engine fuel, accomplish through following step:
(1), the vortex shedding flow meter measurement is installed in the engine oil tube flow signal of measurement fuel oil;
(2), signal picker gathers the flow signal of fuel oil in the sampling period, with the fuel flow signal Q that collects
1, Q
2Q
iQ
nThrough signal amplifier signal is amplified, handle through microcomputer, and be stored in the Database Systems;
(3) microcomputer is handled flow velocity and the acceleration that the fuel flow signal obtains fuel oil, and is specific as follows:
There are the relation of confirming in flow and measured flow velocity, acceleration, flow is directly proportional with flow velocity, and the first order derivative of flow is an acceleration;
Flow signal and the corresponding relation between flow velocity, flow and the acceleration of sampling is again according to the flow velocity of fuel oil
Be flow and coefficient
Product obtain the flow velocity of fuel oil; Coefficient
Be the inverse that fuel oil flows through the cross-sectional area of flowmeter,, set,, obtain flow velocity V through the calculation process of microcomputer through Database Systems according to the model of flowmeter
1, V
2V
iV
n, according to the fuel oil acceleration
Be flow differential again with coefficient
Product, try to achieve the acceleration a of fuel oil
1, a
2A
iA
n, acceleration a
1, a
2A
iA
nLeave in the Database Systems;
(4), curve fitting: utilize Database Systems with flow Q
1, Q
2Q
iQ
nWith acceleration a
1, a
2A
iA
nParameter is carried out match; Describe with smooth continuous curve, i.e. a=f (Q), the number of times of match is many more; The precision of polynomial f (Q) is high more; These matched curves are kept in the Database Systems, and each fuel flow constantly obtains acceleration according to these curves a=f (Q), promptly obtain acceleration according to each flow of measuring.
The said sampling period of above-mentioned steps (2) was generally 1～3 second.
Database Systems of the present invention also comprise: database, management system and application program etc.Database Systems are embedded on the microcomputer, data operation and data fitting function.Database has the storage data; Management system is accomplished the programming system that administers and maintains database, and the method that can control is accomplished the operation of inserting new data, modification and retrieval legacy data, can change the storage organization or the data storage location of data; Application program mainly comprises the utility routine of system.Utility routine has alterability through high level language.
In the measuring system of forming by microcomputer, also comprise processing to stochastic error.Stochastic error mainly is because a series of mutual incoherent factors such as the disturbance of the variation of external electromagnetic field, air, vibration cause the combined influence of measured value.Replace hardware filtering through digital filtering, promptly reduce the proportion of interference in signal through operation program.
Just can realize the present invention preferably as stated.
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (2)
1. a measuring method of measuring the acceleration intelligence sensor of engine fuel is characterized in that comprising the steps:
(1), the vortex shedding flow meter measurement is installed in the engine oil tube flow signal of measurement fuel oil;
(2), signal picker gathers the flow signal of fuel oil in the sampling period, with the fuel flow signal Q that collects
1, Q
2... Q
i... Q
nThrough signal amplifier signal is amplified, handle through microcomputer, and be stored in the Database Systems;
(3) microcomputer is handled flow velocity and the acceleration that the fuel flow signal obtains fuel oil, and is specific as follows:
There are the relation of confirming in flow and measured flow velocity, acceleration, flow is directly proportional with flow velocity, and the first order derivative of flow is an acceleration;
Flow signal and the corresponding relation between flow velocity, flow and the acceleration of sampling is again according to the flow velocity of fuel oil
Be flow and coefficient
Product obtain the flow velocity of fuel oil; Coefficient
Be the inverse that fuel oil flows through the cross-sectional area of flowmeter,, set,, obtain flow velocity V through the calculation process of microcomputer through Database Systems according to the model of flowmeter
1, V
2... V
i... V
n, according to the fuel oil acceleration
Be flow differential again with coefficient
Product, try to achieve the acceleration a of fuel oil
1, a
2... a
i... a
n, acceleration a
1, a
2... a
i... a
nLeave in the Database Systems;
(4), curve fitting: utilize Database Systems with flow Q
1, Q
2... Q
i... Q
nWith acceleration a
1, a
2... a
i... a
nParameter is carried out match; Describe with smooth continuous curve, i.e. a=f (Q), the number of times of match is many more; The precision of polynomial f (Q) is high more; These matched curves are kept in the Database Systems, and each fuel flow constantly obtains acceleration according to these curves a=f (Q), promptly obtain acceleration according to each flow of measuring.
2. the measuring method of the acceleration intelligence sensor of the said measurement engine fuel of claim 1, it is characterized in that: the said sampling period of step (2) is 1～3 second.
Priority Applications (1)
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|---|---|---|---|
| CN2011100089492A CN102128648B (en) | 2011-01-14 | 2011-01-14 | Method for measuring engine fuel by intelligent acceleration sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100089492A CN102128648B (en) | 2011-01-14 | 2011-01-14 | Method for measuring engine fuel by intelligent acceleration sensor |
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| CN102128648A CN102128648A (en) | 2011-07-20 |
| CN102128648B true CN102128648B (en) | 2012-10-31 |
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| CN2011100089492A Expired - Fee Related CN102128648B (en) | 2011-01-14 | 2011-01-14 | Method for measuring engine fuel by intelligent acceleration sensor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230686A (en) * | 1999-01-08 | 1999-10-06 | 合肥工业大学 | Digital signal processing system of vortex street flowmeter |
| CN201053885Y (en) * | 2007-07-02 | 2008-04-30 | 陈德彪 | Noise detection flow meter |
| JP2008268066A (en) * | 2007-04-23 | 2008-11-06 | Tokiko Techno Kk | Ultrasonic vortex flowmeter |
| CN101893465A (en) * | 2010-06-30 | 2010-11-24 | 合肥工业大学 | DSP-based electromagnetic flowmeter signal processing system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070089606A1 (en) * | 2005-10-20 | 2007-04-26 | Cullen Robert R | Systems and methods for controlling foaming |
-
2011
- 2011-01-14 CN CN2011100089492A patent/CN102128648B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230686A (en) * | 1999-01-08 | 1999-10-06 | 合肥工业大学 | Digital signal processing system of vortex street flowmeter |
| JP2008268066A (en) * | 2007-04-23 | 2008-11-06 | Tokiko Techno Kk | Ultrasonic vortex flowmeter |
| CN201053885Y (en) * | 2007-07-02 | 2008-04-30 | 陈德彪 | Noise detection flow meter |
| CN101893465A (en) * | 2010-06-30 | 2010-11-24 | 合肥工业大学 | DSP-based electromagnetic flowmeter signal processing system |
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| CN102128648A (en) | 2011-07-20 |
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