CN220357711U - iToF principle optical experiment device - Google Patents
iToF principle optical experiment device Download PDFInfo
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- CN220357711U CN220357711U CN202321932118.9U CN202321932118U CN220357711U CN 220357711 U CN220357711 U CN 220357711U CN 202321932118 U CN202321932118 U CN 202321932118U CN 220357711 U CN220357711 U CN 220357711U
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- 238000002474 experimental method Methods 0.000 title claims abstract description 19
- 230000003287 optical effect Effects 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 37
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims 1
- 230000007774 longterm Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses an iToF principle optical experiment device, which comprises a laser radar measurement main body unit, a fixed base, a time display unit, a guide rail and a reflecting portal frame, wherein the fixed base is arranged on the laser radar measurement main body unit; the laser radar measuring main body unit can emit and receive reflected laser, and calculates phase by using autocorrelation measurement to calculate the flight time of the laser back and forth; the time display unit is connected with the laser radar measurement main body unit through a wire harness, and the laser radar measurement main body unit is tightly connected with the guide rail through the base to realize the equal height of the light path; the guide rail is provided with a movable reflecting door frame, the reflecting door frame is provided with a metal reflecting plate, and the moving distance of the metal reflecting plate can be read out through a scale on the guide rail; the inside basin and transparent solid stick that are equipped with of reflection portal. The utility model has the characteristics of compact structure, convenient component installation and adjustment, convenient experiment operation and the like, and can be widely applied to the technical field of measuring experiment devices for light speed and refractive index.
Description
Technical Field
The utility model relates to the technical field of measuring devices for light speed and refractive index, in particular to an iToF principle optical experiment device.
Background
As the market demand for 3D imaging systems increases, more and more research is devoted to obtaining complete human eye-like 3D information. Real-time 3D imaging systems have more application areas than conventional light intensity imaging systems, such as: automotive safety, biomedical devices, robots, entertainment equipment, industrial control, virtual reality instrumentation, and the like. There are three main technical routes in the 3D imaging field at this stage, namely binocular Stereo Vision (Stereo Vision), structured Light (Structure Light) and Time Of Flight (TOF), wherein the Time Of Flight (TOF) ranging method is one Of the most suitable methods in 3D imaging distance measurement. Based on TOF principle, robert Lange, university of tin root in 2000 manufactured the first 3D camera in the world.
In recent years, with blowout development in the unmanned industry, a laser radar becomes a first choice, and the laser radar also acquires surrounding environment point clouds based on a TOF principle to construct a 3D environment. The laser radar products are various and can be classified into single-line laser radar and multi-line laser radar according to the number of laser scanning lines. TOF is an optical ranging mode utilizing light flight time, and is widely applied to three-dimensional depth perception sensors such as laser radars, depth cameras and the like. Therefore, the laser radar can be used for measuring the light velocity under the condition of known distance, so as to measure the refractive index of the material, and some existing light velocity measurement needs an oscilloscope to measure time. The experimental device does not need an oscilloscope, and utilizes the phase to indirectly measure the time and calculate the back-flying time.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides an iToF principle optical experimental device which has the characteristics of compact structure, convenient component installation and adjustment, convenient experimental operation and the like. Therefore, the laser radar can be used for measuring the light velocity under the condition of known distance, so that the refractive index of the material is measured, industrial application is converted into basic constant measurement in a university physical experiment on one hand, and the principle of current laser ranging is known on the other hand. The utility model can indirectly measure time by using the phase without an oscilloscope, calculate the back flight time, and can be widely applied to the technical field of measuring experimental devices of light speed and refractive index.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: an iToF principle optical experiment device comprises a laser radar measurement main body unit, a fixed base, a time display unit, a guide rail and a reflecting portal frame; the laser radar measuring main body unit can emit and receive reflected laser, and calculates phase by using autocorrelation measurement to calculate the flight time of the laser back and forth; the time display unit is connected with the laser radar measurement main body unit through a wire harness, so that on one hand, a power supply is provided for the laser radar measurement main body unit, and on the other hand, the time measured by the laser radar measurement main body unit is displayed; the laser radar measuring main body unit is tightly connected with the guide rail through the fixed base, so that the same height of the light path is realized; the guide rail is provided with a movable reflecting door frame, the reflecting door frame is provided with a metal reflecting plate, and the moving distance of the metal reflecting plate can be read out through a scale on the guide rail; the inside basin and transparent solid stick that are equipped with of reflection portal.
As an improvement, the laser radar measuring main body unit emits light which is provided with a parallel light lens, the received light which enters the laser radar measuring main body unit is provided with a focusing lens, and a laser driving circuit, a laser receiving circuit and a light flight time measuring circuit are arranged in the laser radar measuring main body unit.
As an improvement, the side surface of the guide rail is provided with scale marks, and the moving position of the reflecting door frame can be read.
As an improvement, the guide rail is made of high-strength forged aluminum alloy, and the surface of the guide rail is coated with a chromium plating wear-resistant layer, so that the scale marks are prevented from being worn after being used for a long time.
As an improvement, the reflecting door frame is fixed on the guide rail, can freely slide on the guide rail, and is provided with a reflecting mirror with adjustable height, so that the reflecting mirror is flush with the laser beam emitted by the laser radar measuring main body unit.
As an improvement, the water tank provides a measurement of the speed of light in the liquid, and calculates the refractive index of the liquid.
As an improvement, the transparent solid rods are provided with a plurality of transparent solid rods, so that the speed of light in the solid can be measured, and the refractive index of the solid can be calculated.
The utility model has the beneficial effects that: the iToF principle optical experimental device has the characteristics of compact structure, convenient component installation and adjustment, convenient experimental operation and the like; on one hand, the industrial application is converted into basic constant measurement in a university physical experiment, and the latest scientific research result is known; compared with the original light speed measurement, the time is measured without an oscilloscope, so that students can know the indirect measurement way of the time and the meaning of autocorrelation more deeply.
Drawings
FIG. 1 is a schematic diagram of the construction of an iToF principle optical experimental device of the utility model;
FIG. 2 is a schematic block diagram of a lidar measurement body unit of the present utility model;
FIG. 3 is a schematic block diagram of a time display unit of the present utility model;
FIG. 4 is a schematic view of the structure of the guide rail of the present utility model;
fig. 5 is a schematic view of the structure of the reflective gantry of the present utility model.
In the figure: 1. a laser radar measurement body unit; 11. an emission window lens; 12. a receiving window lens; 13. photoelectric sensing and signal processing unit board; 14. a communication and power supply interface; 2. a fixed base; 3. a time display unit; 31. a power supply; 32. a main board; 33. a display screen; 34. a power supply and data interface; 35. a USB interface; 4. a guide rail; 41. a scale; 5. a reflective portal; 51. a door frame; 52. a transmitting plate; 53. an adjusting rod; 54. a large fixing screw; 55. small set screws.
Description of the embodiments
Preferred embodiments of the present utility model will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, an iToF principle optical experiment device of the present utility model includes a lidar measurement main body unit 1, a fixed base 2, a time display unit 3, a guide rail 4, and a reflection portal 5; the laser radar measuring main body unit 1 drives laser to output, the laser is converted into better parallel light through a lens, the laser radar measuring main body unit 1 is arranged on the fixed base 2, and the fixed base 2 is tightly connected with the guide rail 3 through two fixed pins, so that the equal height of optical measurement can be realized; the guide rail 4 is provided with a movable reflecting portal 5, the reflecting portal 5 is provided with a metal reflecting mirror which can reflect laser back, the laser radar measuring main body unit 1 can receive the reflected laser, and the back and forth time is displayed on the time display unit 3; further, in order to improve sensitivity, the receiving light window is provided with a focusing lens to focus the laser light on the photosensor.
Further, the time display unit 3 is connected with the laser radar measurement main body unit 1 through a wire harness, so that on one hand, power is provided for the laser radar measurement main body unit, and on the other hand, the time measured by the laser radar measurement main body unit is displayed; furthermore, the parameters can also be directly calculated through software by connecting the USB port on the display unit with the PC.
The working process of the utility model is as follows: connecting an alternating current power supply to a time display unit 3, wherein the time display unit 3 provides power for the laser radar measurement main body unit 1 through a wire harness, the laser radar measurement main body unit 1 immediately starts to work, sends out modulated pulse laser, and the laser hits a reflecting plate of a reflecting portal 5 to reflect the laser back to enter a photoelectric sensor of the laser radar measurement main body unit 1; the laser radar measures the integral time of the microprocessor control photoelectric sensor in the body unit 1, modulates the pulse frequency, calculates and gets the back and forth time between sensor and measured object reflecting plate by 4-Quad method, and transmits the time to the time display unit 3 through the wire harness; the time display unit 3 receives the signal transmitted by the laser radar measuring main body unit 1, and can directly display the signal according to the requirement of a user or transmit the signal to the PC through the USB interface relay.
The main laser radar measuring unit 1 shown in fig. 2 is a schematic block diagram, in which 11 is a transmitting window lens, 12 is a receiving window lens, 13 is a photoelectric sensing and signal processing unit board, and 14 is a communication and power supply interface.
As shown in fig. 3, a schematic block diagram of a time display unit 3 is shown, wherein 31 is a power supply, 32 is a motherboard, 33 is a display screen, 34 is a power supply and data interface connected with a laser radar measuring main body, and 35 is a USB interface connected with a PC.
As shown in the schematic structure of the guide rail 4 in fig. 4, a scale 41 is attached to the guide rail 4.
As shown in fig. 5, the reflecting gantry 5 is schematically shown in fig. 5, where 51 is a gantry, 52 is a transmitting plate, 53 is an adjusting rod, 54 is a large fixing screw, and the size is M4mm, used for adjusting the height of the adjusting rod, 55 is a small fixing screw, and the size is M3mm, used for connecting with the guide rail 4, and fixing the reflecting gantry 5 on the guide rail 4 stably and reliably.
The iToF principle optical experimental device has the characteristics of compact structure, convenient component installation and adjustment, flexible and convenient experimental operation and the like; an experimental apparatus for measuring the speed of light in air, liquid, solid, and refractive index is provided. The utility model calculates the back and forth time between the sensor and the reflecting plate of the measured object by using the 4-Quad method, indirectly measures the time by using the phase, does not need an oscilloscope required by the prior light speed measurement, and avoids the defect of longer light path of the oscilloscope. The utility model effectively combines the measurement principle of the current laser radar, applies industry into university physics experiment teaching, forms a speed measurement experiment group together with sound velocity measurement, and is convenient for students to directly and deeply understand the indirect measurement way of time and the related meanings.
Finally, it should be noted that the above list is only specific embodiments of the present utility model. Obviously, the utility model is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present utility model.
Claims (7)
1. The iToF principle optical experiment device is characterized by comprising a laser radar measurement main body unit (1), a fixed base (2), a time display unit (3), a guide rail (4) and a reflecting portal frame (5); the laser radar measuring main body unit (1) can emit and receive reflected laser, and calculates phase by using autocorrelation measurement to calculate the flight time of the laser back and forth; the time display unit (3) is connected with the laser radar measurement main body unit (1) through a wire harness, and is used for providing power for the laser radar measurement main body unit on one hand and displaying the time measured by the laser radar measurement main body unit on the other hand; the laser radar measuring main body unit (1) is connected with the guide rail (4) through the fixed base (2) to realize the equal height of the light path; the guide rail (4) is provided with a movable reflecting door frame (5), the reflecting door frame (5) is provided with a metal reflecting plate, and the moving distance of the metal reflecting plate can be read out through a scale on the guide rail (4); the inside of the reflecting portal (5) is provided with a water tank and a transparent solid rod.
2. The iToF principle optical experiment device according to claim 1, wherein the laser radar measuring main unit (1) emits light equipped with a parallel light lens, and the received light is equipped with a focusing lens, and a laser driving circuit, a laser receiving circuit and a light flight time measuring circuit are provided therein.
3. An iToF principle optical experiment device according to claim 2, characterized in that the side of the guide rail (4) is provided with a scale mark (41) for reading the displacement position of the reflecting gantry (5).
4. An iToF principle optical experiment device according to claim 3, characterized in that the guide rail (4) is made of high-strength forged aluminium alloy, and the surface is coated with a chrome-plated wear-resistant layer, preventing the scale (41) from wearing after long-term use.
5. The iToF principle optical experiment device according to claim 1, wherein the reflecting gantry (5) is fixed on the guide rail (4), can slide freely on the guide rail (4), and has a height-adjustable reflecting mirror thereon such that the reflecting mirror is flush with the laser beam emitted from the lidar measuring body unit.
6. The iToF principle optical experiment device according to claim 1, wherein the water tank provides a light velocity measuring liquid, and calculates a refractive index of the liquid.
7. The iToF principle optical experiment device according to claim 1, wherein the transparent solid rods are provided in a plurality, so as to measure the speed of light in the solid and calculate the refractive index of the solid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321932118.9U CN220357711U (en) | 2023-07-21 | 2023-07-21 | iToF principle optical experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321932118.9U CN220357711U (en) | 2023-07-21 | 2023-07-21 | iToF principle optical experiment device |
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| Publication Number | Publication Date |
|---|---|
| CN220357711U true CN220357711U (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321932118.9U Active CN220357711U (en) | 2023-07-21 | 2023-07-21 | iToF principle optical experiment device |
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| Country | Link |
|---|---|
| CN (1) | CN220357711U (en) |
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2023
- 2023-07-21 CN CN202321932118.9U patent/CN220357711U/en active Active
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