CN217504753U - Device for measuring three-dimensional terrain in water tank test based on infrared thermal imaging technology - Google Patents
Device for measuring three-dimensional terrain in water tank test based on infrared thermal imaging technology Download PDFInfo
- Publication number
- CN217504753U CN217504753U CN202220783747.9U CN202220783747U CN217504753U CN 217504753 U CN217504753 U CN 217504753U CN 202220783747 U CN202220783747 U CN 202220783747U CN 217504753 U CN217504753 U CN 217504753U
- Authority
- CN
- China
- Prior art keywords
- water tank
- infrared thermal
- acquisition unit
- image acquisition
- steel frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The utility model provides a device for measuring three-dimensional terrain in a water tank test based on an infrared thermal imaging technology, which comprises an electrothermal furnace, a water tank, a horizontal steel frame and an infrared thermal image acquisition unit; the water tank is clamped on the upper surface of the electric heating furnace, and the lower part of the water tank extends into the electric heating furnace; a sand bed and water are arranged in the water tank, and the sand bed is positioned at the bottom of the water tank; the top ends of the two side walls of the water tank are respectively provided with a longitudinal clamping groove extending along the Y direction, and the horizontal steel frame is erected between the two longitudinal clamping grooves and can move along the longitudinal clamping grooves; a pair of horizontal steel frames are respectively provided with a transverse clamping groove with an inward opening, and a vertical steel frame is arranged between the pair of transverse clamping grooves; the infrared thermal image acquisition unit is positioned in the water tank and above the free water surface, and the radiation end of the infrared thermal image acquisition unit faces the free water surface; the infrared thermal image acquisition unit is fixed on a vertical suspension rod. The utility model discloses can carry out dynamic measurement to model test's topography height in the basin.
Description
Technical Field
The utility model belongs to hydrodynamics and river dynamics field, concretely relates to carry out three-dimensional topography measuring's device based on infrared thermal imaging technique measurement basin is experimental when carrying out silt defeated relevant experiment of moving in basin.
Background
In the research of the related tests of the movement of the sediment, such as the evolution of a riverbed, local scouring, sediment transport and the like, the accurate dynamic measurement of the three-dimensional terrain change is required. At present, in a water tank test, three-dimensional terrain measurement methods are mainly classified into 2 types: (1) contact measurement methods, including steel rule measurement, pin survey, theodolite method, contour method, photoelectric type topographer, resistance type topographer, etc.; (2) non-contact measuring methods include tracking topographers, laser rangefinders, ultrasonic topographers, and the like. Specifically, a steel rule measuring method, a probe method, a theodolite method and a contour method are used as traditional topographic survey methods, water is drained for measurement after a stage test is finished, but sediment is gradually compacted in the drainage process, so that the measured topographic form and the actual topographic form have deviation, the measuring precision is limited, the operation is complex, and time and labor are consumed. Photoelectric topographers use the property of infrared light reflected at interfaces of different media to measure topography. The method can be used for underwater topography measurement, but the underwater topography measurement is still contact measurement, and can cause certain damage to the topography. Resistance topographers use the difference in resistance values in water and sludge to measure terrain. The method has the advantages of simple instrument manufacturing, convenient operation, higher measurement precision for the moving bed scouring condition, and very sensitivity to the turbidity of the water body. The tracking type landform instrument utilizes the principle of a balance bridge to realize full-automatic measurement of landforms. The method has high measurement precision, realizes automatic measurement, and has expensive equipment. Laser rangefinders use the transmission, reflection and reception of laser light for topographical measurements. The method is simple to operate, has high measurement precision and efficiency, and cannot realize accurate measurement of the underwater topography due to water surface refraction. The underwater ultrasonic topographic surveying equipment measures the topography by transmitting, reflecting and receiving ultrasonic waves, and the ultrasonic topographic meter is used as an underwater non-contact measuring method, so that real-time dynamic measurement of the model topography becomes possible. However, the underwater ultrasonic topographic surveying equipment has fast speed and high precision of single-point measurement, but the signal is easily interfered by water flow, barriers and other external factors.
In summary, the two types of terrain measurement devices are single-point measurement, and cannot perform global dynamic measurement; if a plurality of measuring devices are arranged at the same time, the whole device has high manufacturing cost.
Disclosure of Invention
An object of the utility model is to provide a device based on three-dimensional topography among infrared thermal imaging technique measurement basin is experimental, based on infrared thermal imaging technique, according to the different principle of the thermal radiation physical characteristic of water and sand, highly carries out the dynamic measurement to the topography of model test in the basin. In order to achieve the above purpose, the utility model adopts the following technical scheme:
an apparatus for measuring three-dimensional terrain in a sink test based on an infrared thermal imaging technique, comprising:
an electric furnace;
the water tank is clamped on the upper surface of the electric heating furnace, and the lower part of the water tank extends into the electric heating furnace; a sand bed and water are arranged in the water tank, the sand bed is positioned at the bottom of the water tank, and the free water surface of the water is higher than the sand bed; the top surface of the water tank is open; the top ends of the two side walls of the water tank are respectively provided with a longitudinal clamping groove extending along the Y direction, and the opening end of each longitudinal clamping groove faces upwards;
the horizontal steel frames extend along the X direction, are erected between the two longitudinal clamping grooves and can move along the longitudinal clamping grooves; a pair of horizontal steel frames are respectively provided with a transverse clamping groove with an inward opening, a vertical steel frame is erected between the pair of transverse clamping grooves, and the vertical steel frame can move along the transverse clamping grooves;
the infrared thermal image acquisition unit is positioned in the water tank and above the free water surface, and a radiation end of the infrared thermal image acquisition unit faces the free water surface; the infrared thermal image acquisition unit is fixed on a vertical suspension rod, and the vertical suspension rod penetrates through the vertical steel frame and is in threaded connection with the vertical steel frame.
Preferably, the end faces of the horizontal steel frames, which are in contact with the longitudinal clamping grooves, are provided with longitudinal rollers, and the longitudinal rollers are matched with the corresponding longitudinal clamping grooves.
Preferably, the end faces of the vertical steel frame, which are in contact with the transverse clamping grooves, are provided with transverse rollers, and the transverse rollers are matched with the corresponding transverse clamping grooves.
Preferably, the electric heating furnace is electrically connected with a temperature controller.
Preferably, a graduated scale is pasted on the upper surface of the horizontal steel frame.
Preferably, a level gauge is arranged on the infrared thermal image acquisition unit.
Preferably, the infrared thermal image acquisition unit is in signal connection with a computer.
Preferably, the electric heating furnace comprises a top cover, the water tank is clamped on the top cover, and the side wall and the bottom surface of the electric heating furnace are both provided with electric heating wires. .
Compared with the prior art, the utility model has the advantages that:
(1) the device is non-contact measurement, is simple and convenient to operate, can measure the three-dimensional terrain in real time under the condition that the water surface has no obvious fluctuation, does not need to stop or stop the test, thereby realizing real-time dynamic measurement, not interfering the movement of water flow sediment, finally obtaining the real-time three-dimensional terrain information, improving the test efficiency and having high reliability.
(2) Compared with single-point measurement, the device can carry out global measurement on a rectangular area, greatly reduces the workload, and is beneficial to obtaining high-quality data in the sand bed evolution process.
Drawings
Fig. 1 is a top view of an apparatus for measuring three-dimensional topography in a water tank test based on an infrared thermal imaging technique according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
fig. 3 is a map of a result of the topography measurement.
The system comprises an electric heating furnace 1, a sand bed 2, a water tank 3, a radiating surface 4, a free water surface 5, an infrared thermal image acquisition unit 6, a longitudinal clamping groove 7, a longitudinal roller 8, a horizontal steel frame 9, a graduated scale 10, a leveling instrument 11, a vertical suspension rod 12, a computer 13, a transverse roller 14 and a vertical steel frame 15.
Detailed Description
The present invention will now be described in more detail with reference to the drawings, in which preferred embodiments of the invention are shown, it being understood that one skilled in the art could modify the invention herein described while still achieving the beneficial effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
As shown in fig. 1-2, a device for measuring three-dimensional topography in a water tank 3 test based on an infrared thermal imaging technology, which is mainly used for measuring the topography of a sand bed 2 in an indoor water tank 3 shown in fig. 2, comprises: a constant temperature electric heating unit, an infrared thermal image acquisition unit 6 and a data post-processing unit (a computer 13).
Specifically, the constant temperature electric heating unit is used for uniformly heating the sand bed 2 in the water tank 3 and comprises an electric heating furnace 1 and a temperature controller. The electric heating furnace 1 is electrically connected with a temperature controller through a lead; the electric heating furnace 1 selects different liquid heating media according to the working temperature requirement. The electric heating furnace 1 comprises a top cover, the water tank 3 is clamped on the top cover, and the side wall and the bottom surface of the electric heating furnace 1 are both provided with electric heating wires. The working principle of the electric heating furnace 1 is the prior art, and is not described herein again.
The water tank 3 is clamped on the upper surface of the electric heating furnace 1, and the lower part of the water tank 3 extends into the electric heating furnace 1; a sand bed 2 and water are arranged in the water tank 3, and the sand bed 2 is positioned at the bottom of the water tank 3 and is formed by accumulating silt; the water in the water tank 3 submerges the sand bed 2, and the free water surface 5 of the water is higher than the sand bed 2; the top surface of the water tank 3 is open; the top of 3 both sides walls in basin all sets up one along the Y to the vertical draw-in groove 7 that extends, and the open end of vertical draw-in groove 7 is up.
The horizontal steel frames 9 extend along the X direction, the horizontal steel frames 9 are erected between the two longitudinal clamping grooves 7 and can move along the longitudinal clamping grooves 7, specifically, the end faces, contacting the longitudinal clamping grooves 7, of the horizontal steel frames 9 are provided with longitudinal rollers 8, and the longitudinal rollers 8 are matched with the corresponding longitudinal clamping grooves 7; a pair of horizontal steel frames 9 are provided with transverse clamping grooves with inward openings (the opening ends face the direction of the infrared thermal image acquisition unit 6), a vertical steel frame 15 is erected between the pair of transverse clamping grooves, the vertical steel frame 15 can move along the transverse clamping grooves, specifically, the end faces of the vertical steel frame 15, which are in contact with the transverse clamping grooves, are provided with transverse rollers 14, and the transverse rollers 14 are matched with the corresponding transverse clamping grooves. And a graduated scale 10 is adhered to the upper surface of the horizontal steel frame 9 and is used for calibrating the displacement of the infrared thermal image acquisition unit 6.
The infrared thermal image acquisition unit 6 is positioned in the water tank 3 and above the free water surface 5, and the radiation end of the infrared thermal image acquisition unit 6 faces the free water surface 5; namely, the infrared thermal image collection unit 6 does not directly contact with the water tank 3 and the sand bed 22 in the water tank 3, but longitudinally collects thermal radiation signals on the surface of the sand bed 2 towards the water tank 3 to form the radiation surface 4.
The infrared thermal image acquisition unit 6, such as an infrared imager, is fixed to a vertical suspension rod 12 (extending in the Z direction), and the vertical suspension rod 12 passes through the vertical steel frame 15 and is in threaded connection with the vertical steel frame 15. A level gauge 11 is arranged on the infrared thermal image acquisition unit 6 and used for calibrating the horizontal position of the infrared thermal image acquisition unit 6; the infrared thermal image acquisition unit 6 is in bidirectional transmission with a computer 13 through a wireless transmission module. The vertical suspension rods 12 are used for adjusting the displacement of the infrared thermal image acquisition unit in the Z direction, and the purpose of the vertical suspension rods is to ensure the requirement of measurement resolution. Such as: the infrared thermal image acquisition unit is higher in height, so that the shooting range is large, but the measurement resolution is lower; the infrared thermal image acquisition unit is low in height, the shooting range is small, and the measurement resolution is high. The shooting range and the imaging resolution are comprehensively considered to determine the telescopic length of the vertical suspension rod 12, and further determine the height of the infrared thermal image acquisition unit.
As shown in FIG. 3, the three-dimensional topographic thermal image generated by the infrared thermal image acquisition unit 6 is high in accuracy of the three-dimensional topography measured by the device and clear in image processing as can be seen from FIG. 3.
Specifically, the infrared thermal image acquisition unit 6 acquires the uneven phenomenon of the surface heat of the sand bed 2, converts the uneven phenomenon into a digital temperature value and a visual color thermal image, and determines the topographic information of the sand bed 2 by combining with a proper data processing method. The physical characteristics of the thermal signal in space are represented by the uneven temperature distribution phenomenon, and high and low temperature regions exist, so that the temperature change of pixel points in different regions has different rising and falling rates along with time, and the surface temperature change of any pixel point can be expressed as:
wherein, the first and the second end of the pipe are connected with each other,
，
，
respectively material density, specific heat capacity and thermal conductivity,
representing the amount of heat generated per unit volume by the energized heat source.
In particular, the thermal emissivity refers to the ability of the material of the object to generate heat radiation outwards, and the thermal emissivity of the actual object is often influenced by the environment and the state of the actual object.
Wherein the surface heat emissivity of the sand and the water are respectively
，
The thickness of the material is different, the energy radiated outwards is also different, and the different thicknesses of the material present different colors in the infrared thermal image acquisition unit 6.
The working principle of the device is as follows:
(1) the method comprises the steps of arranging a horizontal steel frame 9, then arranging a vertical steel frame 15 along the central line direction of a water tank 3, and finally installing a vertical suspension rod 12 and an infrared thermal image acquisition unit 6.
(2) The heating furnace is opened to heat the sand bed 2.
(3) And opening the infrared thermal image acquisition unit 6, receiving the radiation signal of the infrared thermal image acquisition unit 6 by using the computer 13, and storing a group of visual color images of the sand bed 2 without height change as a basic image.
(4) Keeping the water surface of the water tank 3 free from obvious fluctuation, adjusting the transverse position of the infrared thermal image acquisition unit 6 through the transverse roller 14, fixing the infrared thermal image acquisition unit to a certain fixed position of the water tank 3, and storing the visual image according to the step 3 to finish the section measurement work.
(5) And (5) moving the longitudinal roller 8, repeating the steps (3) to (4) and finishing another section measurement work.
The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.
Claims (8)
1. The utility model provides a device based on three-dimensional topography in infrared thermal imaging technique measurement basin is experimental which characterized in that includes:
an electric furnace;
the water tank is clamped on the upper surface of the electric heating furnace, and the lower part of the water tank extends into the electric heating furnace; a sand bed and water are arranged in the water tank, the sand bed is positioned at the bottom of the water tank, and the free water surface of the water is higher than the sand bed; the top surface of the water tank is open; the top ends of the two side walls of the water tank are respectively provided with a longitudinal clamping groove extending along the Y direction, and the opening end of each longitudinal clamping groove faces upwards;
the horizontal steel frames extend along the X direction, are erected between the two longitudinal clamping grooves and can move along the longitudinal clamping grooves; a pair of horizontal steel frames are respectively provided with a transverse clamping groove with an inward opening, a vertical steel frame is erected between the pair of transverse clamping grooves, and the vertical steel frame can move along the transverse clamping grooves;
the infrared thermal image acquisition unit is positioned in the water tank and above the free water surface, and a radiation end of the infrared thermal image acquisition unit faces the free water surface; the infrared thermal image acquisition unit is fixed on a vertical suspension rod, and the vertical suspension rod penetrates through the vertical steel frame and is in threaded connection with the vertical steel frame.
2. The device for measuring the three-dimensional terrain in the sink test based on the infrared thermal imaging technology as claimed in claim 1, wherein the end surfaces of the horizontal steel frame, which are in contact with the longitudinal clamping grooves, are provided with a longitudinal roller, and the longitudinal rollers are matched with the corresponding longitudinal clamping grooves.
3. The device for measuring the three-dimensional terrain in the sink test based on the infrared thermal imaging technology as claimed in claim 1, wherein a transverse roller is disposed on each end face of the vertical steel frame contacting the transverse clamping groove, and the transverse roller is adapted to the corresponding transverse clamping groove.
4. The apparatus according to claim 1, wherein the electric furnace is electrically connected to a temperature controller.
5. The device for measuring the three-dimensional terrain in the flume test based on the infrared thermal imaging technology as claimed in claim 1, wherein a graduated scale is pasted on the upper surface of the horizontal steel frame.
6. The device for measuring the three-dimensional terrain in the flume test based on the infrared thermal imaging technology as claimed in claim 1, wherein a level is arranged on the infrared thermal image acquisition unit.
7. The device for measuring the three-dimensional terrain in the flume test based on the infrared thermal imaging technology as claimed in claim 1, wherein the infrared thermal image acquisition unit is connected with a computer signal.
8. The apparatus according to claim 1, wherein the electric heater comprises a top cover, the water tank is clamped on the top cover, and heating wires are disposed on the side wall and the bottom surface of the electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220783747.9U CN217504753U (en) | 2022-04-06 | 2022-04-06 | Device for measuring three-dimensional terrain in water tank test based on infrared thermal imaging technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220783747.9U CN217504753U (en) | 2022-04-06 | 2022-04-06 | Device for measuring three-dimensional terrain in water tank test based on infrared thermal imaging technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217504753U true CN217504753U (en) | 2022-09-27 |
Family
ID=83348384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220783747.9U Active CN217504753U (en) | 2022-04-06 | 2022-04-06 | Device for measuring three-dimensional terrain in water tank test based on infrared thermal imaging technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217504753U (en) |
-
2022
- 2022-04-06 CN CN202220783747.9U patent/CN217504753U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113124941B (en) | Non-contact type river channel flow measuring and accurate calculating method | |
| CN107588913A (en) | A kind of deflection of bridge span detecting system and detection method | |
| CN104313986B (en) | Surface evenness detection system and method | |
| CN105320596B (en) | A kind of bridge deflection test method and its system based on inclinator | |
| CN108254032A (en) | River ultrasonic wave time difference method method of calculating flux | |
| CN101975570B (en) | Three-dimensional observation device for scouring terrain | |
| CN102607820B (en) | Focal length measurement method for micro-lens array | |
| CN102072720B (en) | High accuracy measuring method for in-tube liquid level elevation of photoelectric and tubular settlement meter | |
| CN105222849B (en) | A kind of volumetric glass volumetric measurement system and method | |
| CN106705857A (en) | Automatic monitoring system of laser surface displacement | |
| CN205785432U (en) | A kind of static level level measurement device based on triangulation laser range principle | |
| CN103940344B (en) | A kind of High Precision Long-distance displacement transducer | |
| CN102279032A (en) | Three-dimensional reconstruction method of micro amplitude waves of free liquid surface | |
| CN108828262A (en) | A kind of wide-range groundwater velocity and direction test device and method | |
| CN103675328B (en) | A kind of detection method of suspended sediment group sinking velocity | |
| CN107727152B (en) | Automatic field soil erosion monitoring device and monitoring method | |
| CN217504753U (en) | Device for measuring three-dimensional terrain in water tank test based on infrared thermal imaging technology | |
| CN112254764B (en) | System and method for rapidly positioning and monitoring dam leakage channel | |
| CN110186538B (en) | River test water level meter and parameter calibration method thereof | |
| CN111455787B (en) | Pavement detection system based on pavement three-dimensional digitization | |
| CN103063382B (en) | A kind of amount of deflection self-operated measuring unit and measuring method thereof | |
| CN104297753A (en) | Method for inversion of ocean surface wind direction through navigation radar images on basis of self-adaptation diminishing operator | |
| CN108037051B (en) | Intelligent cleaning type sand measuring device and method | |
| CN207649664U (en) | The automatic soil erosion monitoring device in field | |
| CN108180892A (en) | Composite level parametric measurement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |