CN212031735U - Single-point wind measurement laser radar system based on cloud deck carries out wind field measurement - Google Patents
Single-point wind measurement laser radar system based on cloud deck carries out wind field measurement Download PDFInfo
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- CN212031735U CN212031735U CN202020084015.1U CN202020084015U CN212031735U CN 212031735 U CN212031735 U CN 212031735U CN 202020084015 U CN202020084015 U CN 202020084015U CN 212031735 U CN212031735 U CN 212031735U
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Abstract
The utility model discloses a single-point wind lidar system for wind field measurement based on a holder, which comprises a wind lidar and a holder; the wind-measuring laser radar comprises a telescope component and a wind-measuring radar body connected with the telescope component through a cable; the telescope component is detachably connected with the holder; the telescope assembly comprises an optical antenna and an attitude detection module; the optical antenna is used for expanding and collimating the emitted laser signals and receiving echo signals; the attitude detection module is used for detecting the attitude of the optical antenna and transmitting the attitude data to the holder; the pan-tilt comprises a pan-tilt drive for controlling the scanning of a given position of the wind field by means of the emission signal of the optical antenna and for adjusting the angle of the optical antenna in accordance with said attitude data. The utility model discloses can realize that anemometry laser radar measures wind field data more accurately.
Description
Technical Field
The utility model relates to an atmosphere wind field measurement field especially relates to a single-point anemometry laser radar system based on cloud platform carries out wind field measurement.
Background
The high-precision detection research of the atmospheric wind field has extremely important significance on the aspects of atmospheric scientific research, aerospace safety guarantee, wind energy development and utilization, space military platforms and the like. The middle and high-rise atmospheric wind field is a basic parameter of the atmosphere in the region, the wind field not only plays an important role in energy transmission between the middle and high-rise atmosphere and the upper and lower layers, but also has great influence on the safety and orbital operation of the spacecraft, and is an important space environment parameter. The wind field information is an important reference basis for atmospheric scientific research, and the wind field measurement result can also be used as an important basis for establishing an atmospheric model, so that atmospheric dynamics research is carried out on the basis of the wind field information. The high-precision and high-space-time-resolution wind field data play an important role in improving the accuracy of weather forecast, and regional wind field detection can accurately monitor the distribution of cold and warm air flows in the atmosphere in time and space, so that some weather systems appear on the basis of presuming the cold and warm air flows. Has great significance for preventing typhoon, sand storm, hurricane and other natural disasters.
The detection technology of the atmospheric wind field mainly comprises the following steps: rotor anemometers, sounding balloons, sodar, microwave radar, and lidar. The former two methods are passive detection methods, and can only measure horizontal wind speed, and cannot meet the requirements of most cases. In order to obtain three-dimensional wind field information, sodar, microwave radar and laser radar are intensively studied, but sodar is susceptible to atmospheric temperature and detection distance is short. The microwave radar has a long wavelength, is mainly used for forming echo signals on large-size particles gathered in rain, cloud, ice and the like, and basically cannot generate echo signals on small-size particles such as atmospheric molecules, aerosol particles and the like, so that the microwave radar has strong detection capability on cloud and rain weather, and can form a detection blind area when the atmosphere is uniform in clear air and the aerosol density is low. The wind lidar acts on atmospheric molecules and aerosol particles, is the best scheme for realizing all-weather wind field observation at present, and has the advantages of small volume, high wind field measurement accuracy, high time and space resolution and the like, so that the wind lidar has great research value.
However, during the detection process of the carrier platform of the wind lidar, due to the influence of various factors such as airflow and flight operation, the carrier platform cannot always keep uniform flight speed and stable flight attitude, and the jitter of the carrier platform has an error on the inversion of the wind speed of the wind lidar system installed on the carrier platform. The motion compensation methods for airborne radar are basically divided into two categories: one method is compensation of software layer based on various algorithms, and the other method is compensation of hardware layer, and the hardware platform compensation method can be subdivided into two types, 1) triaxial stabilization method, which is to correct instructions by using a three-dimensional servo system; 2) the biaxial stabilization method is to decompose the correction of the three-freedom-degree attitude change of the carrier into an azimuth projection component and a pitching projection component. The cloud deck can well integrate the advantages of two aspects, can control the optical antenna by resolving the flight attitude, and can perform jitter processing at the same time, thereby improving the measurement accuracy of the system.
a. Wind speed inverts for jitter errors.
For ground-based doppler weather radar, since the emission source of the echo is stationary, the doppler shift is only produced by the relative motion of the detection target to the radar antenna. When the radar is installed on a moving carrier platform, the Doppler frequency shift during the detection process still reflects the relative movement between the detection target object and the radar antenna moving along with the carrier platform. Theoretically, under the condition that the radar, particularly the radar antenna part and the carrier platform are relatively static, due to the influence of various factors such as airflow and flight operation, the relative position of the radar, particularly the radar antenna part and the carrier platform shakes, and the inversion result is influenced to a certain extent.
b. Deviation of received echo of radar antenna
The radar antenna emits a detection beam which propagates along the radial direction, a backscatter echo of the beam after the beam meets a detected target object is received by the radar antenna along the radial direction, the characteristics of the detected target object are deduced reversely by analyzing the backscatter echo, and the radar has a time interval between the emission of a pulse and the reception of the backscatter echo.
The orientation of the loaded radar antenna is changed due to the instability of the carrier platform in the weather radar system in the interval. Theoretically, a change in the orientation of the radar antenna may affect the reception of a portion of the echo within the probe beam. During the time interval between the emission of a pulse by the radar antenna and the reception of an echo, a change in the state of motion of the radar antenna has a non-negligible effect on the phase difference between the emitted and received pulse.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a single-point anemometry laser radar system based on cloud platform carries out wind field measurement, the problem that exists among the prior art is solved to the part at least.
The utility model discloses a single-point anemometry laser radar system based on cloud platform carries out wind field measurement, include:
a wind measuring laser radar and a holder;
the wind lidar comprises a telescope assembly and a wind radar body connected with the telescope assembly through a cable;
the telescope component is detachably connected with the holder;
the telescope assembly comprises an optical antenna and an attitude detection module;
the optical antenna is used for expanding and collimating the emitted laser signals and receiving echo signals;
the attitude detection module is used for detecting the attitude of the optical antenna and transmitting the attitude data to the holder;
the pan/tilt head includes a pan/tilt head driving section for controlling scanning of a given position of the wind field via the emission signal of the optical antenna, and adjusting an angle of the optical antenna according to the attitude data.
Further, in the single-point wind lidar system, the holder comprises a horizontal motor and a vertical motor; and adjusting the angle of the optical antenna through the horizontal motor and the vertical motor.
Further, in the above-mentioned single-point wind lidar system, the telescope component with the cloud platform can be dismantled and be connected: and the optical antenna is connected with the vertical motor through a connecting frame.
Further, the single-point wind lidar system further comprises a damping frame;
the shock absorption frame comprises a first connecting plate, a second connecting plate and a shock absorber arranged between the first connecting plate and the second connecting plate;
the shock absorption frame further comprises a fixing frame, and the fixing frame is fixed on two sides of the second connecting plate.
Further, in the single-point wind lidar system, the shock absorbers are a plurality of spherical shock absorbing members disposed between the first connecting plate and the second connecting plate.
Further, in the single-point wind lidar system, the fixing frame is in a V shape; and the number of the first and second electrodes,
the free end of the fixing frame is provided with a semicircular clamping part.
The utility model discloses in: the wind measurement laser radar is detachably connected with the cloud platform, the cloud platform can work in a motion mode and a locking mode, the motion mode of the cloud platform enables the following speed of the platform system to be greatly increased, the requirement that in the time interval between the emission pulse of the radar antenna of the coherent wind measurement laser radar and the receiving echo, the adjustment of the orientation of the radar antenna is carried out through the cloud platform control signal, more echo signals are received as far as possible, and the capability of the radar antenna for receiving the echo signals is improved.
And the 360-degree rotation function of the holder enables the direction of the optical antenna to have more movable ranges, the capability of the radar antenna for receiving echo signals is further improved, the posture of the optical antenna can be controlled more accurately, more accurate wind field measurement is achieved, and errors caused by flying motion of a flight system are reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used 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 it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a block diagram of an embodiment of a single-point wind lidar system for wind field measurement based on a pan-tilt;
fig. 2 shows a schematic diagram of the telescope assembly connected with the pan-tilt and the shock-absorbing frame in the embodiment of the single-point wind-finding laser radar system for wind field measurement based on the pan-tilt of the present invention;
fig. 3 shows a schematic structural diagram of a damping frame in an embodiment of the single-point wind lidar system for measuring wind field based on a pan-tilt;
fig. 4 shows a schematic structural diagram of the pan-tilt mounted on the shock-absorbing frame in the embodiment of the single-point wind lidar system for measuring the wind field based on the pan-tilt of the present invention;
fig. 5 shows the utility model discloses in the single-point anemometry lidar system embodiment based on the cloud platform carries out wind field measurement, anemometry lidar's structural principle schematic diagram.
The list of reference numbers is as follows:
100 wind measuring laser radar
110 telescope assembly
111 optical antenna
112 gesture detection module
120 wind measuring radar body
200 cloud platform
210 holder driving part
1 fixed mount
2 damping element
3 horizontal motor
4 vertical motor
5 optical antenna
6 connecting frame
7 antenna connector
8 lens
9 first connecting plate
10 second connecting plate
11 shock-absorbing rack
12 clamping part
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It should be noted that, in the case of no conflict, the features in the following embodiments and examples may be combined with each other; moreover, all other embodiments that can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort fall within the scope of the present disclosure.
Referring to fig. 1, fig. 1 shows the structure block diagram of an embodiment of the single-point wind lidar system for wind field measurement based on the pan-tilt.
This embodiment carries out wind field measurement's single-point anemometry laser radar system based on cloud platform includes: a wind lidar 100 and a holder 200; the wind lidar 100 comprises a telescope assembly 110 and a wind radar body 120 connected with the telescope assembly 110 through a cable; the telescope assembly 110 is removably attached to the head 200. More specifically, the telescope assembly 110 includes an optical antenna 111 and an attitude detection module 112; the optical antenna 111 is used for performing beam expanding collimation on the transmitted laser signal and receiving an echo signal; the attitude detection module 112 is configured to detect an attitude of the optical antenna and transmit the attitude data to the pan/tilt head 200; the pan/tilt head 200 includes a pan/tilt head driving section 210, and the pan/tilt head control section 210 is configured to control scanning of a given position of the wind field via the transmission signal of the optical antenna 111, and adjust the angle of the optical antenna in accordance with the attitude data.
Preferably, the pan-tilt comprises a horizontal motor and a vertical motor; the angle of the optical antenna is adjusted through the horizontal motor and the vertical motor.
In this embodiment, anemometry lidar 100 can dismantle with cloud platform 200 and be connected, and cloud platform 200 can work at motion mode and locking mode, and the motion mode of cloud platform makes platform system follow speed promote by a wide margin, satisfies in coherent anemometry lidar's radar antenna transmit pulse and the time interval between the receipt echo, carries out the directional adjustment of radar antenna through cloud platform control signal, receives more echo signal as far as possible, improves radar antenna and receives echo signal's ability.
And the 360-degree rotation function of the holder enables the direction of the optical antenna to have more movable ranges, the capacity of the optical antenna for receiving echo signals is further improved, the posture of the optical antenna can be controlled more accurately, and more accurate wind field measurement is achieved.
In one embodiment, a cradle may be configured for a pan-tilt. Refer to fig. 2 to 4.
As above, the pan-tilt based wind lidar system may include: wind measuring laser radar and cloud platform. The wind lidar comprises a telescope component and a wind radar body (not shown) connected with the telescope component through a cable, and the telescope component is detachably connected with the holder.
The mechanical connection of the telescope assembly to the head, and the shock mount, is shown in fig. 2.
The holder comprises a horizontal motor 3 and a vertical motor 4, the horizontal motor 3 controls the horizontal movement and the horizontal direction of the holder device, and the vertical motor 4 controls the vertical scanning angle of the optical antenna 5. The optical antenna 5 in the telescope assembly transmits/receives laser pulses. A connection bracket 6 connects the optical antenna 5 with the vertical motor 4. The antenna joint 7 is the joint of the optical fiber and the laser radar system, and the lens 8 is a collimating lens inside the optical antenna.
In this embodiment, a shock mount 11 in the lidar system acts to reduce the effect of jitter on the antenna.
The shock-absorbing frame 11 includes a first connecting plate 9, a second connecting plate 10, and a shock absorber disposed between the first connecting plate 9 and the second connecting plate 10. The shock-absorbing mount 11 further comprises a fixing mount 1, and the fixing mount 1 is fixed on two sides of the second connecting plate 10 and used for fixing the optical antenna 5 in the no-load device.
Further, in the above wind lidar system, the dampers are a plurality of spherical dampers 2 disposed between the first connecting plate 9 and the second connecting plate 10.
Further, in the wind lidar system, the fixing frame 1 is in a V shape; furthermore, a semicircular clamping part 12 is arranged at the free end of the fixed frame 1.
Fig. 5 shows the utility model discloses in the embodiment of single-point anemometry lidar system, the control schematic diagram that anemometry lidar and cloud platform combine now explains as follows each partial structure:
CW, which represents a continuous wave laser, which emits continuous light to provide a high quality light source for a wind lidar system;
the beam splitter divides the laser light source into two beams of light, wherein one beam of light is used as local oscillation light beat frequency, and the other beam of light is used as signal light;
AOMs, which are acousto-optic modulators, typically modulate a continuous light signal into pulsed light while shifting the frequency, e.g., 80 MHz;
an EDFA which is an optical fiber amplifier and amplifies the power of the continuous optical signal;
the circulator sends signal light and receives an echo signal;
the optical antenna is used for expanding and collimating the laser pulse;
the holder controls the scanning direction and adjusts the posture of the optical antenna;
the coupler beats the local oscillator optical signal light;
the balance detector is used for converting the echo optical signal into a radio frequency signal;
and processing and controlling the echo radio frequency signal through a control circuit between the balance detector and the holder.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a single-point anemometry lidar system based on cloud platform carries out wind field and measures which characterized in that includes:
a wind measuring laser radar and a holder;
the wind lidar comprises a telescope assembly and a wind radar body connected with the telescope assembly through a cable;
the telescope component is detachably connected with the holder;
the telescope assembly comprises an optical antenna and an attitude detection module;
the optical antenna is used for expanding and collimating the emitted laser signals and receiving echo signals;
the attitude detection module is used for detecting the attitude of the optical antenna and transmitting attitude data to the holder;
the head includes a head drive section for controlling scanning of a given position of a wind field via a transmission signal of the optical antenna, and adjusting an angle of the optical antenna in accordance with the attitude data.
2. The single point anemometry lidar system of claim 1,
the holder comprises a horizontal motor and a vertical motor;
and adjusting the angle of the optical antenna through the horizontal motor and the vertical motor.
3. The single point anemometry lidar system of claim 2,
the telescope component with the cloud platform can be dismantled and be connected: and the optical antenna is connected with the vertical motor through a connecting frame.
4. The single point anemometry lidar system of claim 3,
the shock absorption frame is also included;
the shock absorption frame comprises a first connecting plate, a second connecting plate and a shock absorber arranged between the first connecting plate and the second connecting plate;
the shock absorption frame further comprises a fixing frame, and the fixing frame is fixed on two sides of the second connecting plate.
5. The single point anemometry lidar system of claim 4,
the shock absorber is a plurality of spherical shock absorbing members arranged between the first connecting plate and the second connecting plate.
6. The single point anemometry lidar system of claim 5,
the fixing frame is V-shaped; and the number of the first and second electrodes,
the free end of the fixing frame is provided with a semicircular clamping part.
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| CN202020084015.1U CN212031735U (en) | 2020-01-15 | 2020-01-15 | Single-point wind measurement laser radar system based on cloud deck carries out wind field measurement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113138397A (en) * | 2021-06-01 | 2021-07-20 | 中国计量大学 | Unmanned aerial vehicle keeps away barrier device and unmanned aerial vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138397A (en) * | 2021-06-01 | 2021-07-20 | 中国计量大学 | Unmanned aerial vehicle keeps away barrier device and unmanned aerial vehicle |
| CN113138397B (en) * | 2021-06-01 | 2023-12-26 | 中国计量大学 | Unmanned aerial vehicle keeps away barrier device and unmanned aerial vehicle |
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