CN217787380U - Three-dimensional scanning laser radar device - Google Patents

Abstract

The utility model belongs to atmospheric environment surveys the field, in particular to three-dimensional scanning laser radar device. The laser radar device comprises a laser, a receiving telescope, a rotating platform and a computing unit; the laser is used for emitting laser beams to the atmosphere; the receiving telescope is used for receiving echo signals reflected after the laser beams and sol particles in the atmosphere react; the laser and the receiving telescope are both fixedly arranged on the rotating platform; and the computing unit is used for computing the foggy information according to the echo information received by the receiving telescope. Through the scheme, the group fog can be accurately detected in the complex geographic environment.

Description

Three-dimensional scanning laser radar device

Technical Field

The utility model belongs to atmospheric environment surveys the field, in particular to three-dimensional scanning laser radar device.

Background

The cloud is one of the important parameters of meteorological observation. The method can accurately detect the accident, can provide early warning for the fields of aviation, navigation, highways and the like, thereby avoiding the occurrence of major accidents and having important research significance. In the prior art, an artificial visual method, an image method, a transmission visibility meter and a forward scattering visibility meter are commonly used, and all of the methods represent visibility in a wide area by a single-point measurement value in a point-to-surface manner on the premise of assuming that the meteorological environment around an installation site is uniform. This assumption of "wide area uniform climate conditions" is essentially absent in real world environments. Therefore, under the condition of uneven geographical environment or under the condition of local rain or snow storm, the readings of the visibility measuring instruments are easy to mislead, and the accurate and timely feedback can not be made on the weather phenomenon which seriously affects the navigation safety. Therefore, a high visibility and accurate measurement of the foggy mass scanning device is urgently needed.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the utility model discloses a stereo scanning laser radar device, which comprises a laser, a receiving telescope, a rotary platform and a computing unit;

the laser is used for emitting laser beams to the atmosphere;

the receiving telescope is used for receiving echo signals reflected after the laser beams and sol particles in the atmosphere act;

the laser and the receiving telescope are both fixedly arranged on the rotating platform;

and the computing unit is used for computing the foggy information according to the echo information received by the receiving telescope.

Further, the laser radar device further comprises an optical fiber coupling unit and a detector;

the optical fiber coupling unit and the detector are arranged at the tail end of the receiving telescope;

the input end of the optical fiber coupling unit is communicated with the output end of the receiving telescope, and the output end of the optical fiber coupling unit is communicated with the input end of the detector.

Furthermore, the optical fiber coupling unit comprises a collimation assembly and a convergence assembly, and the collimation assembly is communicated with the convergence assembly through an optical fiber jumper.

Further, the collimating assembly comprises a collimating lens and a first optical fiber collimator, and the converging assembly comprises a second optical fiber collimator and a converging lens;

the collimating lens is used for receiving the echo signals collected by the receiving telescope, and the first optical fiber collimator is arranged in parallel with the collimating lens;

the first optical fiber collimator and the second optical fiber collimator are coupled and communicated through an optical fiber jumper; the output end of the second optical fiber collimator is aligned with the converging lens, and the converging lens is used for converging the echo signal to the receiving surface of the detector.

Furthermore, the laser radar device also comprises a power supply, an industrial personal computer and an analog acquisition card;

the power supply is connected with the laser, the detector, the industrial personal computer and the analog acquisition card;

and the industrial personal computer is respectively connected with the analog acquisition card, the rotary platform and the laser.

Further, the laser is a fiber laser or a solid laser.

Further, the receiving telescope is a refraction type telescope or a Cassegrain type telescope.

Further, the laser radar also comprises a network unit, a control unit and a display unit;

the network unit is used for transmitting the scanning result calculated by the industrial personal computer to the control unit;

the control unit is used for controlling the rotating platform, receiving the calculation result of the industrial personal computer and transmitting the calculation result to the display unit;

and the display unit is used for displaying the scanning result.

The utility model has the advantages that specifically as follows:

1) Can scan group fog under inhomogeneous geographical environmental condition or have under the rainy or snowstorm condition in locality, laser instrument and receiving telescope army fix on rotary platform, realize once debugging, measure many times.

2) The signal of the receiving telescope is transmitted to the detector through the optical fiber coupling unit, so that the stability of system transmission can be ensured.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a system configuration diagram of a mid-volume scanning lidar apparatus according to the present invention;

fig. 2 shows a schematic structural diagram of an optical fiber coupling unit according to an embodiment of the present invention.

In the figure: 1. a collimating lens; 2. a first fiber collimator; 3. an optical fiber jumper; 4. a second fiber collimator; 5. a converging lens.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The utility model discloses a three-dimensional scanning laser radar device, which comprises a laser, a receiving telescope, a rotary platform and a computing unit;

the laser is used for emitting laser beams to the atmosphere;

the receiving telescope is used for receiving echo signals reflected after the laser beams and sol particles in the atmosphere react;

the laser and the receiving telescope are both fixedly arranged on the rotating platform;

and the computing unit is used for computing the foggy information according to the echo information received by the receiving telescope.

Specifically, the laser is fixedly installed on the rotary platform and emits laser beams to the atmosphere, the wavelength of the laser beams is selected according to components needing to be detected in actual operation, the laser beams are contacted with the fog clusters and then act with sol particles in the fog clusters, and the sol particles reflect the laser beams to generate backward echo signals. And the receiving telescope is fixedly arranged on the rotating platform, is arranged at a preset angle with the laser, and receives the echo signal through the receiving telescope. The laser and the receiving telescope are arranged in the same direction, so that the receiving telescope can receive echo signals generated after the laser beam and the sol particles in the cluster mist act as much as possible. When the rotary platform rotates, the laser and the receiving telescope are in a relative static state, so that after the rotary platform rotates, the laser and the receiving telescope do not need to be further debugged, and the cloud in different directions can be directly scanned and detected. The three-dimensional scanning of the mist is realized, and a large amount of scanning time can be saved. Through carrying out the whole scanning of multi-angle to group's fog, synthesize multiunit scanning data through the computational element and can carry out accurate the detection to group's fog information.

Further, the laser is a fiber laser or a solid laser.

Further, the receiving telescope is a refraction type telescope or a Cassegrain type telescope.

In another embodiment of the present invention, the lidar device further includes a fiber coupling unit and a detector;

the optical fiber coupling unit and the detector are arranged at the tail end of the receiving telescope;

the input end of the optical fiber coupling unit is communicated with the output end of the receiving telescope, and the output end of the optical fiber coupling unit is communicated with the input end of the detector.

The optical fiber coupling unit transmits the echo signals received by the receiving telescope to the detector, and the detector converts the received echo signals into point signals and then transmits the point signals to the computing unit. The echo signal is transmitted by adopting a coupling transmission method, so that the degree of freedom is higher, more space is saved, the size of the laser radar detection system is smaller, and the application range is wider.

Illustratively, the optical fiber coupling unit comprises a collimating assembly and a converging assembly, and the collimating assembly is communicated with the converging assembly through an optical fiber jumper.

Further, the collimating assembly comprises a collimating lens and a first optical fiber collimator, and the converging assembly comprises a second optical fiber collimator and a converging lens;

the collimating lens is used for receiving the echo signals collected by the receiving telescope, and the first optical fiber collimator is arranged in parallel with the collimating lens;

the first optical fiber collimator and the second optical fiber collimator are coupled and communicated through an optical fiber jumper; the output end of the second optical fiber collimator is aligned with the converging lens, and the converging lens is used for converging the echo signal to the receiving surface of the detector.

The collimating lens is arranged in parallel with the output end of the receiving telescope, an optical signal output by the receiving telescope is changed into a parallel light beam after passing through the collimating lens to enter the first optical fiber collimator, the first optical fiber collimator is connected with the second optical fiber collimator through a jumper wire, an echo signal converges the parallel light to the output end of the optical fiber coupling unit through the converging lens after passing through the second optical fiber collimator, a detector arranged at the output end of the optical fiber coupling unit can effectively convert the echo signal into an electric signal, and then the electric signal is sent to the calculating unit.

Furthermore, the laser radar device also comprises a power supply, an industrial personal computer and an analog acquisition card; the power supply is connected with the laser, the detector, the industrial personal computer and the analog acquisition card; and the industrial personal computer is respectively connected with the analog acquisition card, the rotary platform and the laser.

The power supply is connected with the laser, the detector, the industrial personal computer and the analog acquisition card. For example, the power supply may be a commercial power, or may be a battery or other convenient power supply. The industrial personal computer is connected with the laser, the detector, the rotating platform and the simulation acquisition card to carry out overall control on the whole system. In general, an industrial personal computer can be used as a computing unit to compute the acquired data. The analog acquisition card is also connected with the detector and is used for further converting the converted electric signals into digital signals and transmitting the digital signals to the computing unit for output processing.

In another embodiment of the present invention, the lidar further comprises a network unit, a control unit, and a display unit;

the network unit is used for transmitting the scanning result calculated by the industrial personal computer to the control unit;

the control unit is used for controlling the rotating platform, receiving a calculation result of the industrial personal computer and transmitting the calculation result to the display unit;

and the display unit is used for displaying the scanning result.

Specifically, the present embodiment uses an industrial personal computer as a computing unit. The industrial personal computer calculates a group of data results and sends corresponding instructions to the control unit, the control unit controls the rotary platform to rotate by a certain angle, so that the group data is collected, the final scanning result is finally obtained through a plurality of groups of data results, and the industrial personal computer transmits the data results to the display unit through the network unit to be displayed. The embodiment can improve the scanning precision, realize the remote control and remote data transmission of the laser radar, and further improve the application range of the equipment.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (7)

1. A three-dimensional scanning laser radar device is characterized in that,

the laser radar device comprises a laser, a receiving telescope, a rotating platform and a computing unit;

the laser is used for emitting laser beams to the atmosphere;

the receiving telescope is used for receiving echo signals reflected after the laser beams and sol particles in the atmosphere react;

the laser and the receiving telescope are both fixedly arranged on the rotating platform;

the computing unit is used for computing the foggy information according to the echo information received by the receiving telescope;

the laser radar device also comprises a power supply, an industrial personal computer and an analog acquisition card;

the power supply is connected with the laser, the detector, the industrial personal computer and the analog acquisition card;

and the industrial personal computer is respectively connected with the analog acquisition card, the rotary platform and the laser.

2. The stereo scanning lidar apparatus of claim 1,

the laser radar device also comprises an optical fiber coupling unit and a detector;

the optical fiber coupling unit and the detector are arranged at the tail end of the receiving telescope;

the input end of the optical fiber coupling unit is communicated with the output end of the receiving telescope, and the output end of the optical fiber coupling unit is communicated with the input end of the detector.

3. The stereo scanning lidar apparatus of claim 2,

the optical fiber coupling unit comprises a collimation assembly and a convergence assembly, and the collimation assembly is communicated with the convergence assembly through an optical fiber jumper.

4. The stereo scanning lidar apparatus of claim 3,

the collimating assembly comprises a collimating lens and a first optical fiber collimator, and the converging assembly comprises a second optical fiber collimator and a converging lens;

the collimating lens is used for receiving the echo signals collected by the receiving telescope, and the first optical fiber collimator is arranged in parallel with the collimating lens;

the first optical fiber collimator and the second optical fiber collimator are coupled and communicated through an optical fiber jumper; the output end of the second optical fiber collimator is aligned with the converging lens, and the converging lens is used for converging the echo signal to the receiving surface of the detector.

5. The stereo scanning lidar apparatus of claim 1,

the laser is a fiber laser or a solid laser.

6. The stereo scanning lidar apparatus of claim 1,

the receiving telescope is a refraction type telescope or a Cassegrain type telescope.

7. The stereo scanning lidar apparatus of claim 1,

the laser radar also comprises a network unit, a control unit and a display unit;

the network unit is used for transmitting the scanning result calculated by the industrial personal computer to the control unit;

the control unit is used for controlling the rotating platform, receiving the calculation result of the industrial personal computer and transmitting the calculation result to the display unit;

and the display unit is used for displaying the scanning result.

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