CN208297726U - Chamber, laser radar experimental rig and system - Google Patents
Chamber, laser radar experimental rig and system Download PDFInfo
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- CN208297726U CN208297726U CN201820955353.0U CN201820955353U CN208297726U CN 208297726 U CN208297726 U CN 208297726U CN 201820955353 U CN201820955353 U CN 201820955353U CN 208297726 U CN208297726 U CN 208297726U
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Abstract
The utility model discloses a kind of chamber, laser radar experimental rig and system.The chamber includes: closed box and is installed on the intracorporal Work condition analogue equipment of case, is provided with transmissive region on a side of cabinet, the exit window of the laser beam as testing laser radar；Laser beam is projected from the window mirror of testing laser radar, and the geometric center of window mirror and the geometric center in transmissive region are on a horizontal line；Work condition analogue equipment includes vibration machine, and vibration machine is fixedly connected with testing laser radar.Using the technical scheme in the embodiment of the utility model, online reliability test can be unfolded to laser radar, improve the accuracy of the reliability test of laser radar.
Description
Technical Field
The utility model relates to a wind power generation technical field especially relates to a proof box, laser radar test device and system.
Background
Compared with the traditional wind measuring equipment (an anemoscope and a wind cup) of the wind generating set, the wind measuring precision of the laser radar is higher. The working principle of the laser radar is as follows: a laser beam is emitted by a laser, the laser beam meets aerosol in the air and is reflected, and wind speed information is obtained based on the reflected laser beam. By combining the laser radar and the wind generating set control strategy, the load of the wind generating set can be effectively reduced, and the running reliability of the wind generating set is improved, so that the development of a reliability test on the laser radar is very necessary.
At the present stage, the reliability test of the laser radar is mainly an off-line test, that is, the laser radar is placed in a closed test box, and the laser radar is tested based on the environmental working condition simulated by the test box. However, the off-line test is only to test the reliability of the mechanical parts of the laser radar, and cannot reflect the reliability of the actual wind measuring performance of the laser radar under the real working condition.
Disclosure of Invention
The embodiment of the utility model provides a proof box, laser radar test device and system can expand online reliability test to laser radar, improves laser radar's the reliability test's the degree of accuracy.
In a first aspect, the present invention provides a test chamber, comprising: the laser radar testing device comprises a closed box body and a working condition simulation device arranged in the box body, wherein a transmissible region is arranged on one side surface of the box body and is used as an emergent window of a laser beam of a laser radar to be tested; the laser beam is emitted from a window mirror of the laser radar to be detected, and the geometric center of the window mirror and the geometric center of the transmissible region are on the same horizontal connecting line; the working condition simulation equipment comprises a vibration generator which is fixedly connected with the laser radar to be tested.
In a possible embodiment of the first aspect, the transmissive region is arranged in a central position of the side surface.
In a possible embodiment of the first aspect, the condition simulation device further comprises a temperature and humidity generator and/or an electromagnetic emitter.
In a possible embodiment of the first aspect, the transmissive region is made of quartz glass material.
In a second aspect, the utility model provides a laser radar testing device, this laser radar testing device includes: a test chamber as described above; the wind tunnel device comprises a tunnel body, a driving device and an aerosol generating device, wherein the test box is installed in the tunnel body, the driving device is used for simulating a preset wind speed value, and the aerosol generating device is used for simulating a preset aerosol concentration value.
In a possible embodiment of the second aspect, the tunnel body of the wind tunnel device comprises a stabilizing section, a contracting section and a testing section which are arranged in sequence along the direction of the air flow; the test chamber is fixed to the test section portion.
A third aspect, the utility model provides a laser radar test system, this laser radar test system includes: the device comprises a laser radar to be tested, a data receiving and processing device and the laser radar testing device; the laser radar to be tested is arranged in the box body of the test box, and a laser beam is emitted from a window mirror of the laser radar to be tested and penetrates through a transmissible region of the test box; and the data receiving and processing device is respectively in signal connection with the laser radar to be tested and the wind tunnel device of the laser radar testing device and is used for receiving and processing data generated in the testing process.
In a possible implementation manner of the third aspect, the laser radar testing system further includes a temperature and humidity sensor disposed inside the laser radar to be tested, and the temperature and humidity sensor is in signal connection with the data receiving and processing device.
Compared with the prior art that only can carry out the off-line reliability test after the laser radar outage shuts down, because the embodiment of the utility model provides a be provided with the transmissible region on the side of box, regard this transmissible region as the exit window of the laser beam of the laser radar that awaits measuring, just can launch online reliability test to laser radar from the angle of laser radar's anemometry performance, improve laser radar's the degree of accuracy of reliability test.
Drawings
The present invention may be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings, in which like or similar reference characters identify like or similar features.
Fig. 1 is a schematic structural diagram of a test chamber according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a lidar testing apparatus according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a lidar testing system according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a lidar testing system according to a fourth embodiment of the present invention;
101-a box body; 102-laser radar to be tested; 103-a transmissive region; 104-a vibration generator;
201-a hole body; 202-a drive device; 203-an aerosol generating device;
301-data receiving and processing means.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention.
At the present stage, the reliability test for the laser radar still remains in a verification passing test in a laboratory environment, that is, the actual operation conditions (such as the wind condition and the measurement precision) of the laser radar are not considered, and the laser radar is subjected to an offline reliability test after power failure and shutdown. Even if the wind turbine is started to operate, the laser radar cannot measure effective wind speed information because the test box is closed and light-tight.
Therefore, the embodiment of the utility model provides a proof box, laser radar test device and system can expand online reliability test to laser radar from the angle of laser radar's anemometry performance, improves laser radar's the reliability test's the degree of accuracy.
Fig. 1 is a schematic structural diagram of a test chamber according to a first embodiment of the present invention. The test chamber shown in fig. 1 includes a closed case 101 and a condition simulation apparatus installed in the case 101. For the purpose of illustrating the specific structure of the test chamber in the embodiment of the present invention, a laser radar 102 to be tested is also shown in fig. 1.
As shown in fig. 1, a transmissive area 103 is provided on one side surface of the case 101 as an exit window of a laser beam of the laser radar 102 to be measured. The transmissive area 103 may be made of a material having a high transmittance to the laser beam, for example, a quartz glass material. To facilitate the installation and fixation of the lidar 102 to be measured in the box 101, the transmissive region 103 may be disposed at a central position on the side. The size of the area of the transmissive region 103 is not limited, and the shape includes, but is not limited to, a circle or a rectangle, and can be selected by one skilled in the art according to actual needs.
When the wind measurement is performed on the laser radar 102 to be measured, a laser beam is emitted from a window mirror of the laser radar 102 to be measured. The vibration influence of the actual installation position of the laser radar 102 to be measured of the wind driven generator under different wind speed values is comprehensively considered, and the geometric center O' of the window mirror and the geometric center O of the transmission area 103 are on the same horizontal connection line.
In one example, the window mirror of the laser radar has a length of 20cm and a width of 15cm, and the window mirror material is quartz glass. The transmissive region 103 is made of quartz glass having a length of 60cm and a width of 45cm, and is located at the center of the surface, and the remaining portion of the surface is made of a metal material. The laser beam can penetrate through the quartz glass, so that the problem that the laser cannot be shot in a traditional test box is solved.
In the reliability test related to vibration, the working condition simulation equipment includes a vibration generator 104, and a laser radar 102 to be tested may be fixed above the vibration generator 104, as shown in fig. 1. The vibration generator 104 is mainly used for simulating the amplitude and the frequency of the wind generating set under different wind speed values in the box body 101 so as to support the reliability test of the vibration aspect. For example, the wind tunnel device has a preset wind speed of 10m/s, and accordingly, the vibration generator 104 may be set according to the amplitude and frequency of the wind turbine generator set actually operating at the wind speed of 10m/s, so as to realize the simulation of the real environment condition. Lidar 102 under test may be mounted above vibration generator 104.
Compared with the prior art that only can carry out the off-line reliability test after the laser radar outage shuts down, because the embodiment of the utility model provides a be provided with the transillumination region 103 on the side of box 101, can regard as the exit window of the laser beam of laser radar 102 that awaits measuring to can expand online reliability test to laser radar from the angle of laser radar's anemometry performance, improve laser radar's the degree of accuracy of reliability test.
In combination with the content of the lidar reliability test, the working condition simulation device further comprises a temperature and humidity generator and/or an electromagnetic transmitter (not shown in the figure).
Humiture generator mainly used simulates preset temperature and humidity conditions in box 101, for example: high temperature and high humidity, high temperature and low humidity, low temperature and high humidity, low temperature and low humidity or alternating temperature and humidity, and the like, so as to support the reliability test in the aspect of temperature and humidity.
The electromagnetic transmitter is mainly used for simulating electromagnetic radiation conditions under different conditions in the box body 101 so as to support reliability tests in the aspect of electromagnetic compatibility.
Fig. 2 is a schematic structural diagram of a lidar testing apparatus provided by the second embodiment of the present invention. As shown in fig. 2, the lidar testing apparatus includes a test chamber (see fig. 1) and a wind tunnel apparatus as described above.
As shown in fig. 2, the wind tunnel device includes a tunnel body 201, a driving device 202, and an aerosol generating device 203. The test box is installed in the hole body 201, the driving device 202 is used for simulating a preset wind speed value, and the aerosol generating device 203 is used for simulating a preset aerosol concentration value.
Aerosols are colloidal dispersions of small particles of solids or liquids dispersed and suspended in a gaseous medium. The dispersed phase is solid or liquid small particles, and the dispersion medium is gas. Liquid aerosols are commonly referred to as mists, and solid aerosols are commonly referred to as mists.
In an alternative embodiment, the wind tunnel device comprises a straight wind tunnel, and the tunnel body 201 of the straight wind tunnel comprises a stable section, a contraction section and a test section which are arranged in sequence along the airflow direction.
When the straight-flow wind tunnel is used, the fan blows air to the right end, so that the air enters the stable section from the outside at the left end, the air flow is combed and uniformly mixed by the honeycomb device and the damping net of the stable section, and then the air flow is accelerated by the contraction section to form stable air flow with consistent flow direction and uniform speed in the test section. It will be appreciated by those skilled in the art that any type of wind tunnel device other than a straight flow wind tunnel may be suitable for providing a steady flow of air to a lidar test apparatus, for example, a return flow wind tunnel. Therefore, the utility model does not have any limitation.
Preferably, to further improve the accuracy of the lidar reliability test, the test chamber is typically fixed to the test section portion at a location away from the center of the stability section to maintain a sufficiently stable airflow through the housing 101.
According to the utility model discloses an embodiment, when needs carry out reliability testing to laser radar 102 that awaits measuring, can utilize wind tunnel device simulation predetermined wind speed value and predetermined aerosol concentration value to utilize the test box simulation predetermined environment operating mode, then will await measuring laser radar 102 and set up in the box 101 of test box, and set up box 101 in the hole body 201 of wind tunnel device. With the arrangement, the laser radar 102 to be tested can obtain wind speed measurement data according to the laser beam reflected by the aerosol only by emitting the laser beam from the exit window, and then the reliability test result of the laser radar 102 to be tested can be obtained by analyzing the wind speed measurement data and the preset wind speed value.
Compared with the prior art that only can carry out the off-line reliability test after the laser radar outage shutdown, because the embodiment of the utility model provides a be provided with the transmissible region 103 as the laser beam of laser radar 102 that awaits measuring on the side of box 101, and utilize the wind tunnel device for the wind speed value and the aerosol concentration value that await measuring laser radar 102 provides and simulate the actual during operation to can realize based on laser radar's the actual behavior expandes online reliability test to laser radar, improve laser radar's reliability test's the degree of accuracy.
In addition, because the wind speed in the wind tunnel device tends to be stable, the wind tunnel device can avoid the laser radar from being interfered by the outside during the reliability test, and the reliability of the test data is improved.
In addition, because operating mode analog device in the experimental box can simulate various extreme condition and complex environment, behind the basis wind tunnel device, the embodiment of the utility model provides an in laser radar test device can test laser radar under the extreme condition, the anemometry performance in various complex environment, and not only mechanical structure's reliability, application prospect is extensive.
Fig. 3 is a schematic structural diagram of a lidar testing system according to a third embodiment of the present invention. Fig. 3 is different from fig. 2 in that the lidar testing system in fig. 3 further includes a lidar 102 to be tested and a data receiving and processing device 301.
As shown in fig. 3, the laser radar 102 to be measured is disposed in the casing 101, and the laser beam is emitted from the window mirror of the laser radar 102 to be measured and passes through the transmissive area 103 of the test chamber.
As shown in fig. 3, the data receiving and processing device 301 is disposed outside the wind tunnel device, and is respectively connected to the laser radar 102 to be tested and the wind tunnel device through signals, and receives and processes data generated during the test process. For example, wind tunnel wind speed data, test box data and wind speed measurement data are analyzed, the running state of the radar is monitored in real time, the test process is controlled in real time, and the like.
When the reliability of the laser radar 102 to be tested needs to be tested, a wind tunnel device is used for simulating a preset wind speed value and a preset aerosol concentration value, a test box is used for simulating a preset environment working condition, then the laser radar 102 to be tested is arranged in a box body 101 of the test box, and the box body 101 is arranged in a hole body 201 of the wind tunnel device. Laser beams of the laser radar to be measured 102 are emitted from the transmissive area 103, and the laser radar to be measured 102 can obtain wind speed measurement data according to the laser beams reflected by aerosol in the cavern body 201. The data receiving and processing device 301 may obtain the reliability test result of the lidar 102 to be tested by analyzing the wind speed measurement data and the preset wind speed value.
In an alternative embodiment, the data receiving and processing device 301 specifically performs a comparative analysis on the wind speed measurement data of the lidar 102 to be measured and the wind speed value of the wind tunnel. If the absolute value of the difference between the two is greater than a preset threshold (for example, 0.1), the laser radar 102 to be measured is considered to be abnormal in operation.
Fig. 4 is a schematic structural diagram of a lidar testing system according to a fourth embodiment of the present invention. Fig. 4 is different from fig. 3 in that the data receiving and processing device 301 in fig. 4 is further connected to the test box, and is used for feeding back to the test box when the laser radar under test 102 is abnormally operated, closing the simulation equipment in the test box, and stopping the test.
Further, the lidar testing system further includes a temperature and humidity sensor (not shown in the figure) disposed inside the lidar 102 to be tested, and is configured to send temperature data and humidity data inside the lidar to the data receiving and processing device 301 during the test, so as to analyze the reason for the abnormality of the lidar 102 to be tested.
The reliability test process of the lidar test system in the embodiment of the present invention is described in detail below with reference to fig. 4.
Firstly, whether the laser radar 102 to be detected works normally is checked, then the wind speed in the wind tunnel is set to be 10m/s, the aerosol concentration is set to be A, and the laser radar 102 to be detected is unpacked and is placed into the box 101 after being electrified.
Next, the 12h +12h alternating test and the vibration test are simultaneously performed on the laser radar 102 to be measured, and the temperature value and the humidity value inside the laser radar 102 to be measured are transmitted to the data receiving and processing device 301 in real time. Wherein,
the 12h +12h alternating test specifically comprises the following steps: setting the relative humidity in the box body 101 to be (93 +/-2)%, then increasing the temperature from the normal temperature to 60 ℃, keeping the temperature at 60 ℃ for 12h, then reducing the temperature to the normal temperature, keeping the temperature for 12h, and carrying out 12h +12h alternating test;
the vibration test specifically comprises the following steps: and setting the vibration amplitude and frequency according to the vibration amplitude and frequency of the cabin at the wind speed of 10m/s, wherein the vibration directions are x, y and z.
And finally, comparing and analyzing the wind speed value measured by the laser radar to be tested 102 and the wind speed value of the wind tunnel, and performing linear regression on the average wind speed of the radar to be tested and the wind tunnel within 10 minutes in the same time interval. And calculating the wind speed deviation between the radar to be tested and the wind speed value provided by the wind tunnel.
If the linear regression results satisfy the following parameter ranges simultaneously: the data volume is more than or equal to 48 hours, namely, the number of 10-minute sample points is more than or equal to 288; the slope range is: 1 plus or minus 0.015; the intercept range is: 0.2 m/s; regression coefficient: r2> 0.99. And if the average value of the wind speed deviation meets +/-0.1 m/s and the standard deviation of the wind speed deviation is less than 0.15m/s, the reliability test result of the laser radar 102 to be tested is normal, otherwise, the work is considered abnormal and fed back to the data receiving and processing device 301, the test is stopped, and the reason of the work abnormality is analyzed.
In an optional embodiment, if the test result is abnormal, the test box is controlled to stop working, and the reason of the abnormal is analyzed based on the temperature data and the humidity data inside the laser radar 102 to be tested.
In an optional embodiment, since the aerosol concentration in the air may affect the wind measurement accuracy of the lidar, the lidar testing method may further include: resetting the aerosol concentration value in the hole body 201 for multiple times, and controlling the laser radar 102 to be tested to perform multiple wind speed measurements to obtain multiple wind speed measurement data respectively corresponding to the multiple aerosol concentration values; and then, a prediction relation model for predicting the wind speed measured by the laser radar is established based on the plurality of aerosol concentration values and the corresponding plurality of wind speed measurement data, so that the wind speed information measured by the radar under the actual working condition is corrected, and the wind measurement accuracy and reliability of the laser radar are effectively improved.
Specifically, in order to verify and test the influence of different aerosol concentrations on the radar wind measurement accuracy under the same test condition, the aerosol concentration in the wind tunnel can be set to a plurality of different values, and after the current test is finished, the test is repeated according to a plurality of different aerosol concentration values set in advance under the condition that other test conditions are not changed, so that wind speed measurement data of the laser radar under the conditions of a plurality of different aerosol concentrations are obtained. Then, the plurality of different aerosol concentration preset values and the wind speed measurement data results respectively corresponding to the aerosol concentration preset values are used as basic data for establishing a prediction relation model, and various model training methods can be adopted for training the prediction relation model aiming at the basic data, for example, a nonlinear regression algorithm can be used for establishing the relation model so as to establish the corresponding relation between the aerosol concentration value and the laser radar measured wind speed.
Besides, the basic data can be used as model training samples, and a prediction relation model can be established in a machine learning mode by utilizing a neural network algorithm. Specifically, a plurality of aerosol concentration values can be used as input, a plurality of corresponding laser radar measured wind speeds are used as output, machine learning is carried out by utilizing a neural network algorithm, and finally a prediction relation model is obtained through training. Therefore, the present invention is not limited at all. It can be understood that as training samples are accumulated, the prediction accuracy of the prediction relation model is higher and higher, so that the real-time measured wind speed data corrected based on the predicted measured wind speed data can be more and more accurate. On the basis of the prediction relation model, the aerosol concentration in the atmosphere can be monitored in real time, the measured wind speed data of the laser radar can be predicted in real time, and the wind measuring data predicted in real time is used for correcting the actual measured wind speed data of the laser radar, so that the accuracy of the laser radar in measuring the wind speed is improved.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For the device embodiments, reference may be made to the description of the method embodiments in the relevant part. Embodiments of the invention are not limited to the specific steps and structures described above and shown in the drawings. Those skilled in the art may make various changes, modifications, and additions or change the order between the steps after appreciating the spirit of the embodiments of the invention. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of embodiments of the invention are programs or code segments that are used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
The embodiments of the present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. For example, the algorithms described in the specific embodiments may be modified without departing from the basic spirit of the embodiments of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the embodiments of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. A test chamber, comprising: the device comprises a closed box body and a working condition simulation device arranged in the box body, wherein a transmissible region is arranged on one side surface of the box body and is used as an emergent window of a laser beam of a laser radar to be detected;
laser beams are emitted from a window mirror of the laser radar to be detected, and the geometric center of the window mirror and the geometric center of the transmissive area are on the same horizontal line;
the working condition simulation equipment comprises a vibration generator, and the vibration generator is fixedly connected with the laser radar to be tested.
2. A test chamber as claimed in claim 1, wherein the transmissive region is centrally located on the side.
3. A test chamber as claimed in claim 1, wherein the condition simulating apparatus further comprises a temperature and humidity generator and/or an electromagnetic transmitter.
4. A test chamber as claimed in claim 1, wherein the transmissive region is of quartz glass material.
5. A laser radar testing device, comprising:
the test chamber of any one of claims 1-4;
the wind tunnel device comprises a tunnel body, a driving device and an aerosol generating device, wherein the test box is installed in the tunnel body, the driving device is used for simulating a preset wind speed value, and the aerosol generating device is used for simulating a preset aerosol concentration value.
6. The device according to claim 5, characterized in that the tunnel body of the wind tunnel device comprises a stabilizing section, a contracting section and a testing section which are arranged in sequence along the direction of the air flow; the test chamber is fixed to the test segment portion.
7. A lidar testing system, comprising: a lidar to be tested, a data receiving and processing device and a lidar testing apparatus as claimed in claim 5 or 6; wherein,
the laser radar to be tested is arranged in the box body of the test box, and a laser beam is emitted from a window mirror of the laser radar to be tested and penetrates through a transmissible region of the test box;
and the data receiving and processing device is respectively in signal connection with the laser radar to be tested and the wind tunnel device of the laser radar testing device and is used for receiving and processing data generated in the testing process.
8. The lidar testing system of claim 7, further comprising a temperature and humidity sensor disposed inside the lidar to be tested, wherein the temperature and humidity sensor is in signal connection with the data receiving and processing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820955353.0U CN208297726U (en) | 2018-06-20 | 2018-06-20 | Chamber, laser radar experimental rig and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820955353.0U CN208297726U (en) | 2018-06-20 | 2018-06-20 | Chamber, laser radar experimental rig and system |
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| CN208297726U true CN208297726U (en) | 2018-12-28 |
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