CN113375750B - Non-contact type oil quantity detection device and method for oil tank - Google Patents
Non-contact type oil quantity detection device and method for oil tank Download PDFInfo
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- CN113375750B CN113375750B CN202110648325.0A CN202110648325A CN113375750B CN 113375750 B CN113375750 B CN 113375750B CN 202110648325 A CN202110648325 A CN 202110648325A CN 113375750 B CN113375750 B CN 113375750B
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- fuel
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- oil tank
- oil
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- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003921 oil Substances 0.000 claims abstract description 48
- 239000000295 fuel oil Substances 0.000 claims abstract description 28
- 239000002828 fuel tank Substances 0.000 claims abstract description 28
- 239000010763 heavy fuel oil Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 8
- 230000001788 irregular Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 12
- 238000012545 processing Methods 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- 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 invention relates to a non-contact type oil tank oil quantity detection device and method, comprising a fuel oil tank, a CCD lens and a conical tube; the conical tube is fixed at the center of the bottom of the fuel oil tank; the conical tube vertically penetrates up and down and is large in upper part and small in lower part; holes with the same size are formed in the side walls of the holes; the top of the CCD lens is fixed on the top of the fuel oil tank through a gyroscope, and the CCD lens is right opposite to the upper part of the conical tube; the CCD lens is configured with an annular light source. When the invention detects the residual fuel quantity in the fuel tank, the influence of contact resistance generated by the sliding vane contact during traditional liquid level detection on a fuel oil level signal is avoided, the influence of low sliding vane sensitivity of the sliding rheostat is also avoided, and the residual fuel quantity volume of the fuel tank is obtained only according to the data acquisition and processing of the fuel oil area in the conical tube, thereby greatly improving the accuracy and precision of the fuel quantity data detection of the fuel tank.
Description
Technical Field
The invention relates to the technical field of engineering vehicle oil tank parameter detection, in particular to a non-contact oil tank oil quantity detection device and method.
Background
In the use of engineering vehicles, a vehicle driver knows the residual quantity of fuel through a fuel level sensor in a vehicle fuel tank so as to judge the mileage of the vehicle which continues to run, the prior art generally adopts a variable resistance type liquid level sensor which is equivalent to a sliding rheostat in the aspect of fuel tank fuel level detection, a floater is connected to a sliding sheet of the sliding rheostat, floats on the fuel level in the fuel tank and moves up and down along with the height of the liquid level so as to drive the sliding rheostat connected with the floater to slide back and forth, the residual fuel quantity in the fuel tank of an automobile is obtained by collecting the variable resistance value of the sliding rheostat and is displayed on a combined instrument, wherein the stable state of the fuel level in the fuel tank has a larger influence on the accuracy of fuel quantity monitoring, and the traditional fuel tank liquid level detection method has the problems of larger reading error, low precision, low stability, short service life and the like. Because some engineering vehicles use a large-capacity oil tank, when the oil quantity change is very small, the displacement of the oil tank on the liquid level is very tiny and is more difficult to perceive;
therefore, improving the accuracy and precision of the oil quantity data detection of the oil tank is a technical problem which needs to be solved by the person skilled in the art at present.
Disclosure of Invention
In view of the above, the embodiment of the invention overcomes the current situation that the oil quantity reading precision of the oil tank is low, and provides a non-contact oil tank oil quantity detection method and device, which can effectively improve the accuracy and precision of oil tank oil quantity data detection. The error of the traditional variable resistance type liquid level sensor is about +/-3%, and the CCD lens is used as a main measurement basis, so that the detection precision of the fuel quantity can be improved to be within +/-1%, and the detection precision and accuracy are greatly improved.
The technical scheme of the invention is as follows:
a non-contact oil tank oil quantity detection device comprises a fuel oil tank; the CCD lens and the conical tube are also included;
the conical tube is fixed at the center of the bottom of the fuel oil tank; the conical tube vertically penetrates up and down and is large in upper part and small in lower part; holes with the same size are formed in the side walls of the holes;
the top of the CCD lens is fixed on the top of the fuel oil tank through a gyroscope, and the CCD lens is right opposite to the upper part of the conical tube;
the CCD lens is configured with an annular light source.
The detection process is as follows:
the length M and the width N of the fuel oil tank;
the diameter D of the upper end of the conical tube; the diameter d and the radius R of the lower end; base angle beta, whereHeight L; the taper of the conical tube is (D-D)/L; cone angle 2α;
when the vehicle is in a horizontal stop state, the oil level of the fuel oil tank is kept in a horizontal non-fluctuation state, and the conical tube is circular;
the CCD lens collects circular image information in the conical tube to obtain the radius r of a circular liquid level, so that the residual fuel height h is obtained, and the residual fuel quantity of the residual fuel tank is finally obtained;
the specific process is as follows:
residual fuel levelResidual fuel quantity V of fuel tank 0 ＝N·M·h。
Secondly, when the vehicle is stopped at a place with an inclined angle, the oil level of the fuel oil tank is in an inclined non-fluctuation state, and the conical tube 2 is elliptical;
the CCD lens collects elliptical image information in the conical tube to obtain major axis a and minor axis B, low water level point B and high water level point C of the ellipse, defines generatrix length f of the low water level point B, defines generatrix length e of the high water level point C, and irregular part volume V 3 The calculation process of (1) is as follows:
wherein: r is R 1 、R 2 Respectively representing the distance from the low water level point B and the high water level point C to the central axis of the conical tube;
because ofSo cotα= -tan β, sinα= -cos β
The above transformation is:
and due to R 1 ＝R+fsinα＝R-fcosβ，R 2 ＝R+esinα＝R-ecosβ
The above reconversion is:
residual fuel quantity V of fuel tank 0 ＝V 3 S; where s=conical tube volume/tank volume.
The invention has the technical effects that:
1. the conical tube is connected with the fuel oil tank, and is additionally arranged by utilizing the oil floater inlet of the existing vehicle oil tank, so that the existing fuel oil is not re-drilled;
2. when the residual fuel quantity in the fuel tank is detected, the influence of contact resistance generated by a sliding vane contact during traditional liquid level detection on a fuel oil level signal is avoided, the influence of low sliding vane sensitivity of a sliding rheostat is also avoided, and the residual fuel quantity volume of a fuel oil mailbox is obtained only according to data acquisition and processing of the fuel oil area in a conical tube, so that the accuracy of the traditional fuel float is improved from +/-3% to +/-1%, and the accuracy and precision of fuel oil quantity data detection of the fuel oil mailbox are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the fuel level detecting device of the fuel tank of the present invention.
FIG. 2 is a schematic diagram of the oil level detection device of the oil tank of the present invention when different liquid levels are read.
Fig. 3 is a schematic view of the oil quantity calculation model of embodiment 2 of the present invention.
Fig. 4 is a schematic view of the oil quantity calculation model of embodiment 3 of the present invention.
Fig. 5 is a side sectional view of the fuel tank quantity detecting device of the present invention.
Fig. 6 is a front view of the fuel tank quantity detecting device of the present invention.
Reference numerals: 1. a fuel tank; 2. conical tube; 3. a CCD lens; 4. a gyroscope.
Detailed Description
The invention provides a non-contact type oil quantity detection device for an oil tank, which can improve the detection accuracy of the oil quantity of the oil tank. For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. It should be noted that, based on the embodiments in the present application, those skilled in the art may also make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.
Example 1
A non-contact oil tank oil quantity detection device is shown in fig. 1; comprises a fuel tank 1; the CCD lens 3 and the conical tube 2 are also included;
the conical tube 2 is fixed at the center of the bottom of the fuel tank 1; the conical tube 2 vertically penetrates up and down and is large in upper part and small in lower part; holes with the same size are formed in the side walls of the holes;
the top of the CCD lens 3 is fixed on the top of the fuel oil tank 1 through a gyroscope 4, and the CCD lens 3 is opposite to the upper part of the conical tube 2;
the CCD lens 3 is provided with an annular light source.
Wherein, the model S-RIF4218 of the annular light source and the model SHL-2.8-12MM-1/2.5-CS of the CCD lens 3.
Example 2
On the basis of embodiment 1, this embodiment proposes a method for detecting the amount of oil when the vehicle is in a horizontal stop state, the inside of the conical tube 2 is circular, and the oil level of the fuel tank 1 is kept in a horizontal non-fluctuating state. The CCD lens 3 collects the image information of the inner circle of the conical tube 2 as shown in fig. 2 (a); the area of the circular liquid surface in the conical tube 2 is obtained by processing and analyzing the imaging of the CCD lens 3, the area in the conical tube 2 is uniformly changed, namely, different oil amounts correspond to the only different circular areas, the height of the oil amount in the conical tube 2 during the current detection, namely, the height of the residual fuel oil in the fuel oil tank 1 is obtained by the area of the circular liquid surface, and the residual fuel oil amount of the fuel oil tank 1 is obtained.
The definition is as follows:
the length M and the width N of the fuel tank 1;
the diameter D of the upper end of the conical tube 2; the diameter d and the radius R of the lower end; base angle beta, whereHeight L; the taper of the conical tube 2 is (D-D)/L; cone angle 2α;
when the vehicle is in a horizontal stop state, the oil level of the fuel oil tank 1 is kept in a horizontal non-fluctuation state, and the conical tube 2 is circular; the CCD lens 3 collects the circular image information in the conical tube 2 to obtain the radius r of the circular liquid level, so as to obtain the residual fuel height h, and finally obtain the residual fuel amount of the fuel tank 1; as shown in fig. 3.
The specific process is as follows:
residual fuel levelResidual fuel quantity V of fuel tank 1 0 ＝N·M·h。
Example 3
On the basis of embodiment 1, this embodiment proposes a method in which the conical tube 2 is elliptical when the vehicle is in a tilted state without fluctuation, as shown in fig. 2 (b); a method for detecting the amount of oil in a state where the level of the fuel tank 1 is kept in a level non-fluctuating state.
Different ellipses corresponding to the residual different fuel amounts, wherein the long and short axes corresponding to different fuel sections are also different; when the elliptical liquid surface area read by the CCD lens 3 is known as the major axis and the minor axis, the liquid surface area is formed by the following three parts regardless of the inclination angle: the product of the major and minor axes must correspond to and uniquely correspond to the different ellipses.
The CCD lens 3 collects elliptical image information in the conical tube 2 as shown in FIG. 4. Obtaining major axis a and minor axis B, low water level point B and high water level point C of the ellipse, defining bus length f of low water level point B, defining bus length e of high water level point C, irregular partial volume V 3 The calculation process of (1) is as follows:
wherein: r is R 1 、R 2 Respectively representing the distance from the low water level point B and the high water level point C to the central shaft of the conical tube 2;
because ofSo cotα= -tan β, sinα= -cos β
The above transformation is:
and due to R 1 ＝R+fsinα＝R-fcosβ，R 2 ＝R+esinα＝R-ecosβ
The above reconversion is:
residual fuel quantity V of fuel tank 1 0 ＝V 3 S; where s=conical tube 2 volume/tank volume.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that the terms "mounted" and "connected" should be interpreted broadly, and for example, the terms may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present application and the core ideas thereof. It is noted that some type of fuel tank is not fixed according to the kind of the vehicle. However, it will be appreciated by persons skilled in the art that the above embodiments are provided for illustration of the invention and not for limitation thereof, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims as long as they fall within the true spirit of the invention.
Claims (1)
1. The non-contact oil tank oil quantity detection method comprises a non-contact oil tank oil quantity detection device and is characterized in that: the non-contact type oil tank oil quantity detection device comprises a fuel oil tank (1); the device also comprises a CCD lens (3) and a conical tube (2);
the conical tube (2) is fixed at the center of the bottom of the inside of the fuel oil tank (1); the conical tube (2) vertically penetrates up and down and is large in upper part and small in lower part; holes with the same size are formed in the side walls of the holes;
the top of the CCD lens (3) is fixed on the top of the fuel oil tank (1) through the gyroscope (4), and the CCD lens (3) is right opposite to the upper part of the conical tube (2);
the CCD lens (3) is provided with an annular light source;
the detection process is as follows:
the length M and the width N of the fuel oil tank (1);
the diameter D of the upper end of the conical tube (2); the diameter d and the radius R of the lower end; base angle beta, whereHeight L; the taper of the conical tube (2) is (D-D)/L; cone angle 2α;
when the vehicle is in a horizontal stop state, the oil level of the fuel oil tank (1) is kept in a horizontal non-fluctuation state, and the conical tube (2) is circular;
the CCD lens (3) collects the image information of the inner circle of the conical tube (2) to obtain the radius r of the circular liquid level, so as to obtain the residual fuel height h, and finally obtain the residual fuel quantity of the fuel tank (1);
the specific process is as follows:
residual fuel level
Residual fuel quantity V of fuel tank (1) 0 ＝N·M·h；
Further comprises: when the vehicle is stopped at a place with an inclined angle, the oil level of the fuel oil tank (1) is in an inclined non-fluctuation state, and the conical tube (2) is elliptical;
the CCD lens (3) collects elliptical image information in the conical tube (2) to obtain a major axis a and a minor axis B of the ellipse, a low water level point B and a high water level point C, a bus length f of the low water level point B is defined, a bus length e of the high water level point C is defined, and the irregular part volume V is defined 3 The calculation process of (1) is as follows:
wherein: r is R 1 、R 2 Respectively representing the distance from the low water level point B and the high water level point C to the central shaft of the conical tube (2);
the above transformation is:
residual fuel quantity V of fuel tank (1) 0 ＝V 3 S; wherein s=conical tube (2) volume/tank volume.
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| CN202110648325.0A CN113375750B (en) | 2021-06-10 | 2021-06-10 | Non-contact type oil quantity detection device and method for oil tank |
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| CN202110648325.0A CN113375750B (en) | 2021-06-10 | 2021-06-10 | Non-contact type oil quantity detection device and method for oil tank |
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| CN114061679A (en) * | 2021-11-10 | 2022-02-18 | 四川泛华航空仪表电器有限公司 | High-low temperature oil mass measuring device of intelligent sensor for aviation |
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| TWI772897B (en) * | 2011-08-29 | 2022-08-01 | 美商安美基公司 | Methods and apparati for nondestructive detection of undissolved particles in a fluid |
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| DE4217669A1 (en) * | 1992-05-28 | 1993-04-01 | Daimler Benz Ag | Non-contact level monitor for fluid tank, esp. vehicle fuel tank - has reflective float for light beam from fixed source and with array of photocells to monitor reflected light |
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| CN201926482U (en) * | 2010-12-04 | 2011-08-10 | 沈阳航空航天大学 | Storage tank liquid level measuring device utilizing camera |
| JP2013088231A (en) * | 2011-10-17 | 2013-05-13 | Hosokawa Micron Corp | Powder layer volume measuring apparatus |
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