CN201926482U - Storage tank liquid level measuring device utilizing camera - Google Patents
Storage tank liquid level measuring device utilizing camera Download PDFInfo
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- CN201926482U CN201926482U CN201020642841XU CN201020642841U CN201926482U CN 201926482 U CN201926482 U CN 201926482U CN 201020642841X U CN201020642841X U CN 201020642841XU CN 201020642841 U CN201020642841 U CN 201020642841U CN 201926482 U CN201926482 U CN 201926482U
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- camera
- liquid level
- storage tank
- laser light
- tank liquid
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- Expired - Fee Related
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
A storage tank liquid level measuring device utilizing a camera comprises a camera and three laser light sources. The camera is installed perpendicular to liquid level. The three laser light sources are symmetrically arranged around the camera. Laser beams of the three laser light sources are respectively in the same plane with lens axis of the camera, the included angles of the three laser beams a, b and c with the axis are respectively alpha 1, alpha 2 and alpha 3, and the degrees of the included angles are adjustable to adapt to different shapes of storage tanks. The included angles should be adjusted in a range not exceeding the angle of field of view (FOV) of the camera so as to ensure laser beams are within the range of camera collection. The included angle can be adjusted to zero degree in minimum, namely, the laser beams are perpendicular to the liquid level. The storage tank liquid level measuring device utilizing a camera has the advantages of realizing non-contact measurement, having low measuring cost, and also being used for measurement of internal fuel of fuel tanks apart from being used for measurement of storage tank liquid.
Description
Technical field: the utility model relates to a kind of measurement mechanism of liquid level, and especially a kind of tank level measurement mechanism that utilizes camera belongs to sensor and field of measuring technique.
Background technology: use quite extensive at the tank level automatic measurement of industries such as industry, agricultural, medical treatment at present.Its measuring principle and method are numerous, according to whether contacting with liquid, are divided into contact level gauging and non-contact measurement two classes.Contact type measurement has: float-ball type, and condenser type etc., the former shortcoming is to need sensitive physical construction reliably, and the latter is not suitable for occasions such as liquid thickness; Non-contact measurement has: ultrasonic type, the radar wave formula, they calculate the liquid level degree of depth by the mistiming of measuring the transponder pulse ripple and receive between the reflection wave, their shortcoming is to be not suitable for level change to rock bigger occasion, otherwise its reflection wave might not receive, degree must guarantee essence is installed exactly simultaneously, otherwise the measured deviation of being brought is difficult to be eliminated.In addition, if measured liquid is band corrosivity or explosive, it must be anticorrosion explosion-proof that its measuring process then need be asked sensing device.Various reasons has caused entire measuring device cost height thus, has also restricted the process of numerous automatic fields.
The utility model content: the purpose of this utility model is a kind of measurement mechanism that provides for addressing the above problem.In conjunction with software engineering, it can proofread and correct the measuring error of bringing because of installation deviation, and has under the occasion that bigger variation rocks at liquid level and still can guarantee higher measuring accuracy.
For achieving the above object, the technical solution adopted in the utility model is: a kind of tank level measurement mechanism that utilizes camera, comprise camera and three LASER Light Source, and laser source wavelength is at visible light wave range.Camera is vertically installed towards liquid level.Three LASER Light Source are installed in around the camera symmetrically, the laser beam that it sent (LASER Light Source planoconvex lens converge then form laser beam) respectively with the cam lens optical axis in same plane, laser beam La, Lb, the angle of Lc and optical axis is for being respectively α
1, α
2, α
3, wherein corner dimension can be regulated, so that it adapts to different storage tank shapes, the scope maximum of angle adjustment is no more than the field angle of camera, to guarantee that laser beam drops in the scope of camera collection, the angle minimum is adjusted to 0 °, that is: laser beam is vertical with liquid level.
Advantage of the present utility model: realize non-cpntact measurement, it is low to measure cost, except that being used for the liquid in storage tank measurement, can also be used for the measurement of fuel oil in the fuel tank.
Description of drawings:
Fig. 1 is the scheme of installation of camera and LASER Light Source.
Fig. 2 is that the position of camera and LASER Light Source concerns synoptic diagram.
Embodiment:
As depicted in figs. 1 and 2, camera 1 is vertically installed towards liquid level, and optical axis will be as far as possible perpendicular to liquid level.LASER Light Source LA, LB and LC are installed in around the camera 1 symmetrically, laser beam La, and Lb and Lc and camera 1 lens normal are established light beam La on same plane, and the angle of Lb and Lc and optical axis is for being respectively α
1, α
2, α
3Wherein corner dimension can be regulated, so that it adapts to different storage tank shapes, the scope maximum of angle adjustment is no more than the field angle of camera 1, drops in the scope of camera collection to guarantee laser beam, the angle minimum is adjusted to 0 °, that is: laser beam is vertical with liquid level, and the method for adjustment of angle the best is: when storage tank does not have the situation of liquid, be no more than at angle under the prerequisite of camera field angle, make light beam irradiates arrive a jar feather edge, to obtain best measuring accuracy as far as possible; If the focal length of cam lens is f, the distance between LASER Light Source is respectively d, and d is chosen for 5f～15f usually.By three visual light beam irradiates liquid levels of LASER Light Source emission three beams, transfer to computing machine by camera collection liquid in storage tank image, ask for three intersection point A ' of laser beam and liquid level, B ', the area s that C ' (being luminous point) forms on image just can calculate the height of liquid level again according to measurement mechanism installation parameter and associated reservoir information.
Claims (2)
1. tank level measurement mechanism that utilizes camera, comprise camera and three LASER Light Source, camera is vertically installed towards liquid level, three LASER Light Source are installed in around the camera symmetrically, its laser beam of sending respectively with the cam lens optical axis in same plane, the scope maximum of the angle adjustment of three laser beams and optical axis is no more than the field angle of camera, and the angle minimum is adjusted to 0 °.
2. a kind of tank level measurement mechanism that utilizes camera as claimed in claim 1, it is characterized in that: the focal length of cam lens is f, the distance between LASER Light Source is d, d=5f～15f.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020642841XU CN201926482U (en) | 2010-12-04 | 2010-12-04 | Storage tank liquid level measuring device utilizing camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020642841XU CN201926482U (en) | 2010-12-04 | 2010-12-04 | Storage tank liquid level measuring device utilizing camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201926482U true CN201926482U (en) | 2011-08-10 |
Family
ID=44430327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020642841XU Expired - Fee Related CN201926482U (en) | 2010-12-04 | 2010-12-04 | Storage tank liquid level measuring device utilizing camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201926482U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095469A (en) * | 2010-12-04 | 2011-06-15 | 沈阳航空航天大学 | Device and method for measuring liquid level in storage tank by utilizing camera |
| CN107101926A (en) * | 2017-05-05 | 2017-08-29 | 湖南建研信息技术股份有限公司 | A kind of automatic measurement and the Anti-leakage instrument and impervious detection method of control |
| CN113375750A (en) * | 2021-06-10 | 2021-09-10 | 陕西延长石油（集团）有限责任公司 | Non-contact oil tank oil mass detection device and method |
-
2010
- 2010-12-04 CN CN201020642841XU patent/CN201926482U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095469A (en) * | 2010-12-04 | 2011-06-15 | 沈阳航空航天大学 | Device and method for measuring liquid level in storage tank by utilizing camera |
| CN107101926A (en) * | 2017-05-05 | 2017-08-29 | 湖南建研信息技术股份有限公司 | A kind of automatic measurement and the Anti-leakage instrument and impervious detection method of control |
| CN113375750A (en) * | 2021-06-10 | 2021-09-10 | 陕西延长石油（集团）有限责任公司 | Non-contact oil tank oil mass detection device and method |
| CN113375750B (en) * | 2021-06-10 | 2024-04-16 | 陕西延长石油（集团）有限责任公司 | Non-contact type oil quantity detection device and method for oil tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20121204 |