CN204462425U - Testing device of laser precipitation phenomenon observation instrument - Google Patents

Abstract

The embodiment of the utility model provides a test device for a laser precipitation phenomenon observer, the device includes: a transparent disc (1), and the transparent disc (1) is connected to the drive motor (4) through a connecting shaft (3) ), the drive motor (4) drives the transparent disc (1) to rotate at a specific speed; the drive motor (4) is connected to a motor driver (5), and the motor driver (5) controls the drive The rotating speed of motor (4); Described transparent disk (1) is pasted with simulation patch (2), and described simulation patch (2) has known shape and size, and described transparent disk (1) is placed The laser precipitation observer rotates in the test area.

Description

A testing device for a laser precipitation phenomenon observer

technical field

The utility model relates to the field of laser technology, in particular to a testing device for a laser precipitation phenomenon observer.

Background technique

Observation of precipitation phenomena is one of the most basic items in surface meteorological observation. Data such as precipitation type, instantaneous precipitation intensity, precipitation amount, and radar reflectivity can be used as an important basis for judging natural science phenomena such as meteorology, hydrology, and resource environment. This has great practical value in fields such as agricultural production, transportation, and disaster prevention and mitigation.

The laser precipitation phenomenon observer, also known as the raindrop spectrometer, is an instrument that measures precipitation phenomena through optical principles. The principle can be briefly summarized as follows: a uniform laser beam is arranged in the measurement area of the precipitation observer, and when precipitation particles (such as raindrops, snowflakes, and hail) pass through the measurement area, certain occlusions will be produced on the laser beam , so the optical sensor is used to collect the area and time of precipitation particles blocking the laser beam as output data; and then the output data can be used to calculate and output precipitation type, instantaneous precipitation intensity, precipitation amount and radar reflectivity and other data about precipitation phenomena .

In order to test and verify the precipitation observer, a testing device for the laser precipitation phenomenon observer is also required. The test device generally needs to use some method to simulate the occurrence of precipitation in the measurement area of the precipitation observer, so as to test whether the performance of the precipitation observer is intact and whether the calculation is accurate.

In the prior art, free-falling steel balls are released in the measurement area, and the steel balls are used to simulate precipitation particles to achieve the purpose of simulation testing. However, the disadvantage of this method is that the free-falling steel ball cannot be accurately controlled during the test, and high-speed precipitation particles such as hail cannot be simulated. The simulation degree is relatively simple, and it is difficult to simulate more complex precipitation phenomena such as sleet.

Utility model content

In view of this, the purpose of this utility model is to provide a test device for a laser precipitation phenomenon observer, which uses the patch on the transparent disc to simulate precipitation particles, and controls the rotation of the transparent disc in the test area to achieve high accuracy Precipitation simulation test.

In order to achieve the above object, the utility model has the following technical solutions:

A test device for a laser precipitation phenomenon observer, said device comprising:

A transparent disc (1), the transparent disc (1) is connected to a driving motor (4) through a connecting shaft (3), and the driving motor (4) drives the transparent disc (1) at a specific rotational speed Rotate; the drive motor (4) is connected to a motor driver (5), and the motor driver (5) controls the speed of the drive motor (4);

The transparent disc (1) is pasted with a simulated patch (2), and the simulated patch (2) has a known shape and size, and the transparent disc (1) is placed in the laser precipitation phenomenon observer Rotate in the test area.

The device also includes:

The driving motor (4) is fixed to the adjustment base (7) through the lifting support frame (6); the lifting support frame (6) controls the driving motor (4) to move in the Z-axis direction.

The adjusted base (7) includes:

A Y-direction slide rail (8), the lifting support frame (6) is installed on the Y-direction slide rail (8) through a slide block (9), and the Y-direction motor (10) drives the slide block (9) slide on the Y-direction slide rail (8), so that the lifting support frame (6) and the drive motor (4) move in the Y-axis direction;

The Y-direction slide rail (8) is installed on two parallel X-direction slide rails (11), and the X-direction slide rail (11) and the Y-direction slide rail (8) are perpendicular to each other; the X-direction motor (12) Driving the Y-direction slide rail (8) to slide on the X-direction slide rail, so that the lifting support frame (6) and the driving motor (4) move in the X-axis direction.

The X-direction motor (12) and the Y-direction motor (10) are connected to a motor driver (5), and the motor driver (5) controls the start and stop of the X-direction motor (12) and the Y-direction motor (10).

It can be seen from the above technical scheme that the beneficial effect of the utility model is that the transparent original disk with the simulated patch is placed in the test area of the laser precipitation phenomenon observer to rotate, so that the simulated patch reaches a certain linear velocity , so as to achieve the effect of simulating precipitation particles; by adjusting the shape, size and linear velocity of the simulation patch, the simulation of various types of precipitation phenomena can be accurately realized; Control of the position in the test area; significantly improves the accuracy of the simulation test and the realism of the simulation.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present utility model. Those skilled in the art can also obtain other drawings based on these drawings without any creative work.

Fig. 1～Fig. 2 are the schematic structural diagrams of the device described in the embodiment of the utility model;

Figure 3 is a distribution map of precipitation particles;

Fig. 4 is the flow chart of the method described in the embodiment of the utility model;

Fig. 5 is a flow chart of the method described in another embodiment of the present invention;

Fig. 6 is a schematic diagram of laser beam distribution.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As mentioned above, the principle of the laser precipitation phenomenon observer is that when the precipitation particles pass through the test area, they will block the laser beam in the test area in a certain time and space range, affect the intensity distribution of the laser beam, and then generate The change of the photosensitive current; and the output data of the laser precipitation phenomenon observer can be calculated through the change of the photosensitive current. The calculation process of the laser precipitation phenomenon observer belongs to the prior art, and will not be repeated here.

Based on this principle, it can be understood that in order to test the laser precipitation phenomenon observer by simulating precipitation particles, it is essentially necessary to use some shading particles similar to the shape, size and area of precipitation particles to approach the speed when the precipitation particles fall Pass the test area. In this way, the effect of simulating precipitation particles is achieved.

In the embodiment of the utility model, a test device of a laser precipitation phenomenon observer will be disclosed. The device will be affixed with a simulated patch on a transparent original disk with controllable rotation speed, and the simulated patch will play the role of so-called light-shielding ions; the transparent original disk will be placed in the test of the laser precipitation phenomenon observer. Rotate in the region, so that the simulated patch reaches a certain linear velocity, thereby achieving the effect of simulating precipitation particles.

Referring to Figs. 1-2, which are structural schematic diagrams of the testing device of the laser precipitation phenomenon observation instrument according to the embodiment of the present invention.

In Fig. 1, described device comprises:

A transparent disc 1, the transparent disc 1 is connected to a drive motor 4 through a connecting shaft 3, and the drive motor 4 drives the transparent disc 1 to rotate at a specific speed; the drive motor 4 is connected to a motor driver 5 , the motor driver 5 controls the rotational speed of the drive motor 4; the transparent disk 1 is pasted with a simulation patch 2, and the simulation patch 2 has a known shape and size, and the transparent disk 1 is placed The laser precipitation observer rotates in the test area.

What needs to be explained here is that the so-called placing the transparent disc 1 in the test area for rotation may be placing the transparent disc 1 in the test area completely or partially in the test area. It only needs that the simulation patch 2 can pass through the test area vertically.

It can be seen that the transparent original disk 1 placed in the test area does not have a light-shielding effect, but the simulated patch 2 attached to the transparent original disk 1 has a light-shielding effect. The dummy patch 2 has a known shape and size.

Since the shapes of precipitation particles are different in different precipitation phenomena, the shape, size and area of the simulation patch 2 are important factors that determine the simulation effect.

In this embodiment, different precipitation phenomena can be simulated by changing the shape and size of the simulation patch 2 , and even more complex precipitation phenomena can be simulated by affixing multiple simulation patches 2 . For example, a circular patch with a diameter of about 1-5mm can simulate raindrops, a circular patch with a diameter of about 6-20mm can simulate hail, and a circular patch with a diameter of about 2-15mm can simulate snowflakes, etc.; the above data All can be set according to the laws of nature.

Similarly, another important factor determining the simulation effect is the linear speed of the simulated patch 2 passing through the test area. For example, in natural phenomena, both snowflakes and hailstones can be simulated by circular simulation patches with a diameter of about 6-10mm, but the linear velocity of snowflakes falling is relatively low, about 3m/s or less, while hailstones are generally 8-15m /s range. Therefore, in this embodiment, the rotating speed of the transparent disk 1 is controlled by the driving motor 4, so that the simulated patch 2 reaches a specific linear velocity, thereby achieving the effect of accurately simulating various precipitation phenomena.

To control the linear velocity of the simulated patch 2, you can refer to the following method specifically. Assuming that the simulated patch 2 is to be rotated at a linear velocity v, first measure the distance r from the center of the simulated patch 2 to the center of the transparent disc, and then Obtain the angular velocity ω=v/r that the transparent disc needs to achieve. Therefore, the motor driver 5 controls the drive motor 4 to achieve a specific angular velocity, so that the drive motor 4 drives the transparent disk 1 to rotate at an angular velocity of ω through the connecting shaft 3, and the linear velocity of the analog patch 2 is just v . It should be noted that the angular velocity conversion between the drive motor 4 and the transparent disc 1 also needs to refer to the mechanical relationship between the two on the connecting shaft 4; I won't go into details.

The velocity/diameter interval diagram of precipitation particles for various precipitation phenomena is shown in Fig. 3.

The test device described in this embodiment is different from the existing steel ball free fall test in that it can accurately control the linear velocity of the simulated patch passing through the test area, and use the simulated patch instead of the steel ball to simulate precipitation particles, which is more convenient to adjust its Shape and size, lower cost and greater convenience.

Referring to Fig. 2, it is another embodiment of the device. The device shown in Figure 2 further includes the following structures on the basis of Figure 1:

The driving motor 4 is fixed to the adjustment base 7 through the lifting support frame 6; the lifting support frame 6 controls the driving motor 4 to move in the Z-axis direction.

The adjusted base 7 includes a Y-direction slide rail 8, the lifting support frame 6 is installed on the Y-direction slide rail 8 through a slide block 9, and the Y-direction motor 10 drives the slide block 9 to slide in the Y-direction. Slide on the rail 8, so that the lifting support frame 6 and the driving motor 4 move in the Y-axis direction. The Y-direction slide rail 8 is installed on two parallel X-direction slide rails 11, and the X-direction slide rail 11 and the Y-direction slide rail 8 are perpendicular to each other; the X-direction motor 12 drives the Y-direction slide rail 8 at X Slide on the slide rail, so that the lifting support frame 6 and the driving motor 4 move in the X-axis direction.

The X-direction motor 12 and the Y-direction motor 10 are connected to the motor driver 5 , and the motor driver 5 controls the start and stop of the X-direction motor 12 and the Y-direction motor 10 .

For convenience of explanation, a space coordinate system as shown in FIG. 2 may be established in advance. In this coordinate system, the Z direction represents the vertical direction, and the X direction and the Y direction are two directions perpendicular to each other on the horizontal plane.

The lifting support frame 6 shown provides degrees of freedom in the Z direction, while the X-direction slide rail and the Y-direction slide rail on the adjustment base 7 provide degrees of freedom in the X and Y directions. The transparent disk 1 and the drive motor 4 are placed on the lifting support frame 6 and the adjustment base 7, so that they can move arbitrarily in the three-dimensional space, and make the patch 2 on the transparent disk 1 pass through the laser test area vertically, Further passes may be made at different locations in the test area.

Another feature of the embodiment shown in FIG. 2 that is different from the steel ball free-fall test is that the free-fall steel ball cannot control its falling trajectory and cannot ensure that it passes through the test area accurately. However, in this embodiment, by lifting the supporting frame 6 and adjusting the base 7, the device realizes the control of the position of the transparent disk 1 in the test area.

From the embodiments shown in Figures 1 to 2, it can be seen that the beneficial effect of the device is that the transparent original plate with the simulated sticker is placed in the test area of the laser precipitation phenomenon observer and rotated, so that the simulated sticker The film reaches a certain linear velocity, thereby achieving the effect of simulating precipitation particles; by adjusting the shape, size and linear velocity of the simulated patch, the simulation of various types of precipitation phenomena can be accurately realized; by lifting the support frame and adjusting the base, Realize the control of the position of the transparent disc in the test area; significantly improve the accuracy of the simulation test and the real degree of simulation.

Referring to Fig. 4, it is a specific embodiment of the testing method of the laser precipitation phenomenon observation instrument described in the present invention. The method is essentially a process of testing the laser precipitation phenomenon observer using the device shown in Figures 1-2. The method comprises the following steps:

Step 401 , place the transparent disc with the simulated patch on the test area of the laser precipitation phenomenon observer to rotate, and the simulated patch conforms to the preset simulated data.

In this embodiment, simulated data will be preset. The simulation data that can be artificially preset in the method mainly includes the shape, size, area and linear velocity of the simulation patch, and on the basis of the above data, it can also be calculated according to the existing physical principles. Simulation data, such as instantaneous precipitation intensity, precipitation amount within a certain period of time, or radar reflectivity.

Step 402 , collecting the test data output by the laser precipitation phenomenon observer, and judging whether the difference between the test data and the simulated data is within the error threshold range, and if so, the test is considered successful.

After using the device to carry out the simulation test, the test data output by the laser precipitation phenomenon observer will be collected. Theoretically, the test data should match the preset simulation data, or be within an acceptable error threshold. If the difference between the test data and the simulated data is within the error threshold range, it should be considered that the test data measured by the laser precipitation phenomenon observer is accurate. Otherwise, it can be considered that there are errors in the test data, and the laser precipitation phenomenon observer is not accurate enough.

According to the above test method, the accuracy of many data that can be measured by the laser precipitation phenomenon observer can be tested.

In the method shown in Figure 5, the method of testing precipitation particles and speed is described, which is also the most basic simulation test, as follows:

Step 501, preset simulation data, the simulation data includes the shape and size of the simulated patch; the linear velocity of the simulated patch in the test area of the laser precipitation phenomenon observer.

In this embodiment, the simulated patch is set to be a circle with a diameter of 6 mm, and the linear velocity passing through the test area is 10 m/s.

Step 502, place the transparent disc with the simulated patch that meets the preset shape and size in the test area of the laser precipitation phenomenon observer and rotate at a specific angular speed, so that the simulated patch meets the simulated data line speed.

Place the simulated patch that conforms to the above shape and size on the transparent disc, and place the transparent disc in the test area to rotate for a simulated test, and control the speed of the transparent disc so that the simulated patch reaches the preset Line speed. The specific manner of controlling the rotational speed of the transparent disc has been described in the foregoing embodiments, and will not be repeated here.

Step 503 , collecting the test data output by the laser precipitation phenomenon observer, the test data includes the measured shape and size of the precipitation particles, and the falling velocity of the precipitation particles.

During the simulation test, the laser precipitation phenomenon observer can perform measurements normally, and output the measured shape and size of the precipitation particles, as well as the falling speed of the precipitation particles. Assume that the diameter of the measured precipitation particles is 6.12mm and the velocity is 9.84m/s.

Step 504 , judging whether the difference between the test data and the simulated data is within the error threshold range, and if so, consider the test to be successful.

By comparing and judging the simulated data and the test data, if the two basically match and the difference is within the range of the error threshold, then the test is considered to be successful.

In the same way, only the specific content of the simulated data and test data needs to be replaced, and other tests can be completed on the laser precipitation phenomenon observer.

For example, when the simulated data also includes: using the shape and size of the simulated patch, the linear velocity and the number of passes of the simulated patch in the test area of the laser precipitation phenomenon observer, the standard precipitation is calculated; The test data output by the laser precipitation phenomenon observation instrument also includes the measurement of precipitation. Comparing and judging the simulation data and test data can test whether the precipitation data measured by the laser precipitation phenomenon observer is accurate.

Or, when the simulated data also includes: using the shape and size of the simulated patch and the linear velocity and the number of passes of the simulated patch in the test area of the laser precipitation phenomenon observer, the standard instantaneous precipitation intensity is calculated; then the The test data output by the laser precipitation phenomenon observer also includes measuring the instantaneous precipitation intensity. Comparing and judging the simulation data and test data can test whether the instantaneous precipitation intensity data measured by the laser precipitation phenomenon observer is accurate.

Or, when the simulated data also includes: using the shape and size of the simulated patch and the linear velocity and the number of passes of the simulated patch in the test area of the laser precipitation phenomenon observer, the standard radar reflectivity is calculated; then the The test data output by the laser precipitation phenomenon observer also includes the measurement of radar reflectivity. Comparing and judging the simulated data and test data can test whether the radar reflectivity data measured by the laser precipitation phenomenon observer is accurate.

And so on, no other specific test content will be listed in this embodiment. In a word, any test conducted in combination with the above principles can be combined under the overall technical solution of the present utility model.

In addition, it should be noted that, through the device described in the embodiment shown in FIG. 2 of the utility model, it is also possible to test whether the laser beam in the test area of the laser precipitation phenomenon observer has a phenomenon of divergence.

The details are as follows: the transparent disc with the analog patch is placed in the test area of the laser precipitation phenomenon observer to rotate, and at the same time it moves parallel to the laser beam in the test area; Graphical output to judge whether the laser beam diverges in the test area.

If it is in a uniform and non-divergent laser beam, the rotating transparent disc with the simulated patch moving parallel to the laser beam in the test area, the photosensitive current collected by the observer should not change; Conversely, if the photosensitive current gradually changes with the movement, it indicates that the laser beam diverges, or if the photosensitive current changes irregularly, it may indicate that the light intensity of the laser beam is not uniform in the test area. Refer to Figure 6.

It can be seen from the above technical scheme that the beneficial effect of the method described in this embodiment is that the transparent original disc with the simulated patch is placed in the test area of the laser precipitation phenomenon observer and rotated so that the simulated patch reaches a certain level. The linear velocity can simulate the effect of precipitation particles; by adjusting the shape, size and linear velocity of the simulated patch, the simulation of various types of precipitation phenomena can be accurately realized; by lifting the support frame and adjusting the base, the transparent Control of the position of the disk in the test area; significantly improving the accuracy of the simulation test and the degree of simulation realism.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the scope of protection of the present utility model.

Claims (4)

1. a test device of a laser precipitation phenomenon observer, is characterized in that, said device comprises: A transparent disc (1), the transparent disc (1) is connected to a driving motor (4) through a connecting shaft (3), and the driving motor (4) drives the transparent disc (1) at a specific rotational speed Rotate; the drive motor (4) is connected to a motor driver (5), and the motor driver (5) controls the speed of the drive motor (4); The transparent disc (1) is pasted with a simulated patch (2), and the simulated patch (2) has a known shape and size, and the transparent disc (1) is placed in the laser precipitation phenomenon observer Rotate in the test area. 2. test device according to claim 1, is characterized in that, described device also comprises: The driving motor (4) is fixed to the adjustment base (7) through the lifting support frame (6); the lifting support frame (6) controls the driving motor (4) to move in the Z-axis direction. 3. The testing device according to claim 2, characterized in that the adjusted base (7) comprises: A Y-direction slide rail (8), the lifting support frame (6) is installed on the Y-direction slide rail (8) through a slide block (9), and the Y-direction motor (10) drives the slide block (9) slide on the Y-direction slide rail (8), so that the lifting support frame (6) and the drive motor (4) move in the Y-axis direction; The Y-direction slide rail (8) is installed on two parallel X-direction slide rails (11), and the X-direction slide rail (11) and the Y-direction slide rail (8) are perpendicular to each other; the X-direction motor (12) Driving the Y-direction slide rail (8) to slide on the X-direction slide rail, so that the lifting support frame (6) and the driving motor (4) move in the X-axis direction. 4. testing device according to claim 3, is characterized in that, described X direction motor (12) and Y direction motor (10) are connected to motor driver (5), and described motor driver (5) controls X direction motor ( 12) and Y to the start and stop of motor (10).