A radar verification device and verification method based on a double leveling mechanism

Abstract

The application discloses a radar checking device and method based on a double leveling mechanism, and the radar checking device comprises a water tank, a placing plate, a first electric telescopic rod, a distance measuring mechanism and a first leveling mechanism. The placing plate is used for placing a radar body; the first electric telescopic rod is used for driving the placing plate to move along the height direction of the water tank; the distance measuring mechanism is used for measuring the distance between the emitting surface of the radar body and the bottom of the water tank; and the first leveling mechanism is used for leveling the water tank to keep the water surface in the water tank horizontal relative to the bottom surface of the water tank. The first leveling mechanism is used for leveling the water tank; the water surface in the water tank is kept horizontal relative to the bottom surface of the water tank, so that the measurement error caused by the non-horizontal state of the water surface of the water tank relative to the bottom surface of the water tank is eliminated, and the accuracy of the radar checking is improved.

Description

Technical Field

[0001] This invention relates to the field of radar detection technology, specifically to a radar verification device and method based on a dual-leveling mechanism. Background Technology

[0002] The main procedures for verifying radar used for road, bridge and tunnel inspection are as follows: (1) Add a certain height of pure water to the pool, place a steel plate at the bottom of the pool, or set a steel plate at the bottom of the pool. After moving the radar to the specified height, start radar detection and compare the electromagnetic wave velocity in the water detected by the radar with the theoretical electromagnetic wave velocity in the water to verify whether the radar is qualified.

[0003] (2) An auxiliary device for measuring the electromagnetic wave velocity in air is used: It mainly consists of a clamp, a radar antenna mounting bracket, a base, and a metal-coated reflector. The area of ​​the metal-coated reflector should be no less than four times the bottom area of ​​the engineering radar antenna. In specific operation, the radar body is fixed by the clamping mechanism; the radar is moved to a specified distance from the metal-coated reflector, and the radar transmitting surface is facing the metal-coated reflector. Radar detection begins, and the electromagnetic wave velocity in air detected by the radar is compared with the theoretical electromagnetic wave velocity in air to verify whether the radar is qualified.

[0004] However, the electromagnetic waves emitted by radar travel relatively fast in the air, requiring a longer distance between the radar and the metal-coated reflector, thus making the entire device larger and occupying more space. In contrast, when the electromagnetic waves emitted by radar propagate in water, the slower wave speed reduces the size requirements for the water tank. However, in actual use, uneven ground often results in the water surface in the tank not being perfectly level with respect to the bottom. Since the electromagnetic waves emitted by radar are cone-shaped, uneven water surfaces cause deviations in the propagation distance of the radar beam at different locations. This deviation leads to inaccurate detection of the electromagnetic wave speed in the water, thus affecting the verification results of the radar's compliance. Summary of the Invention

[0005] The purpose of this invention is to improve and innovate upon the shortcomings and problems existing in the prior art, and to provide a radar verification device and method based on a dual-leveling mechanism.

[0006] According to a first aspect of the present invention, a radar verification device based on a dual-leveling mechanism is provided, comprising:

[0007] Water tank;

[0008] The placement plate is used to place the radar body.

[0009] The first electric telescopic rod is used to drive the placement plate to move along the height direction of the water tank.

[0010] A distance measuring mechanism is used to measure the distance between the transmitting surface of the radar body and the bottom of the water tank;

[0011] The first leveling mechanism is used to level the water tank so that the water surface in the tank remains horizontal relative to the bottom surface of the tank.

[0012] A further option is that the placement plate has a hollowed-out section, which corresponds to the emitting surface of the radar body.

[0013] A further embodiment is that the first leveling mechanism includes a fixing block, which is installed at the bottom of the side of the water tank. The fixing block is threaded with adjusting screws through threaded holes. There are three adjusting screws, one of which is spaced equally from the other two.

[0014] A further embodiment is that the first leveling mechanism further includes a first leveling bubble and a second leveling bubble, the axes of the first leveling bubble and the second leveling bubble are perpendicular to each other, and the axis of the second leveling bubble is parallel to the line connecting the two adjusting screws corresponding to the side of the water tank along its length.

[0015] A further embodiment is that an adjustment knob is fixedly connected to the top end of the adjustment screw, and a support foot is fixedly connected to the bottom end of the adjustment screw.

[0016] A further embodiment includes a second leveling mechanism for leveling the placement plate. This mechanism comprises a second and a third electrically operated telescopic rod located on opposite sides of the placement plate's length. The telescopic ends of the second and third telescopic rods are rotatably connected to ball joint seats on opposite sides of the placement plate. The ends of the second and third telescopic rods furthest from the ball joint seats are rotatably connected to a first and a second rotating seat via pins, with the corresponding pins parallel to the width and length directions of the placement plate, respectively. The second and third telescopic rods are staggered along the width direction of the placement plate. Both the first and second rotating seats are connected to the output end of the first telescopic rod.

[0017] A further embodiment is that the placement plate has scale lines extending along the height direction on at least two adjacent sides, and the scale lines are located at both ends of the side of the placement plate, and the water tank is provided with observation windows corresponding to the scale lines.

[0018] A further embodiment is that the distance measuring mechanism includes a distance measuring sensor, which is installed on the lifting block by a first locking nut. The two ends of the lifting block are slidably engaged with the guide rod. The lifting block is threaded with fastening bolts, which pass through the lifting block and abut against the guide rod. The bottom end of the guide rod is installed on the placement plate by a second locking nut, and the bottom end of the placement plate has a through hole corresponding to the distance measuring sensor.

[0019] According to a second aspect of the present invention, a radar verification method based on a dual-leveling mechanism is provided, implemented by the radar verification device described above, comprising the following steps:

[0020] The water tank is leveled by the first leveling mechanism so that the water level in the tank remains horizontal relative to the bottom of the tank.

[0021] The first electric telescopic rod moves the placement plate to a designated height, and the distance between the transmitting surface of the radar to be tested and the bottom of the water tank is measured by the distance measuring mechanism.

[0022] Add water to the tank until the water level reaches the radar's transmitting surface;

[0023] Place the radar to be tested on the placement plate;

[0024] The radar test begins, measuring the propagation speed of the electromagnetic waves emitted by the radar in the water. The measured propagation speed is then compared with the theoretical propagation speed to verify whether the radar is up to standard.

[0025] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention facilitates the leveling operation of the water tank by adjusting the knob, adjusting screw, fixing block, support foot, first level bubble and second level bubble in cooperation with each other; so that the water surface in the water tank is horizontal relative to the bottom surface of the water tank, thereby eliminating the measurement error caused by the water surface in the water tank being non-horizontal relative to the bottom surface of the water tank, and improving the accuracy of radar verification.

[0026] (2) The present invention first levels the water tank through the first leveling mechanism so that the water surface in the water tank is kept horizontal relative to the bottom surface of the water tank; thus, the placement plate can be leveled based on the water surface in the water tank so that the placement plate is horizontal relative to the water surface and the bottom surface of the water tank; thus, it is ensured that the cone-shaped beam emitted by the radar propagates completely in the water, and the distance from different positions of the cone-shaped beam emitted by the radar to the bottom surface of the water tank remains equal, thereby realizing high-precision verification of large-size radar. Moreover, the present invention is based on the scale lines set on the two adjacent sides of the placement plate as a reference, rather than using multiple distance measurement sensors installed on the placement plate for leveling; on the one hand, it effectively saves the cost required to arrange multiple distance measurement sensors; on the other hand, the present invention uses scale lines as a reference, which makes it easier to keep consistent during installation and setting compared to using multiple distance measurement sensors as a reference, thereby effectively avoiding errors caused by installation differences. Thus, leveling is based on whether the scale lines corresponding to the two sides of the placement plate are the same as the scale corresponding to the water surface, which can realize convenient and accurate leveling operation.

[0027] (3) The present invention uses the cooperation of distance measuring sensor, lifting block, first locking nut, fastening bolt, guide rod and second locking nut to make it easy to adjust the height of the bottom of the distance measuring sensor to be flush with the surface of the placement plate. In this way, the distance between the radar emitting surface and the bottom of the water tank can be accurately measured, while ensuring that the radar emitting surface is in contact with the water surface, thereby ensuring that the electromagnetic waves emitted by the radar are completely propagated in the water. Attached Figure Description

[0028] Figure 1 A schematic diagram of the radar verification device provided by the prior art;

[0029] Figure 2 A schematic diagram of the structure of a radar verification device based on a dual-leveling mechanism provided in the first embodiment of the present invention. Figure 1 ;

[0030] Figure 3 A schematic diagram of the structure of a radar verification device based on a dual-leveling mechanism provided in the first embodiment of the present invention. Figure 2 ;

[0031] Figure 4 This is a schematic diagram of the structure of the first leveling mechanism and the second leveling mechanism provided in the first embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the distance measuring mechanism provided in the first embodiment of the present invention.

[0033] Reference numerals: 1. Water tank; 101. Base plate; 2. Placement plate; 201. Hollowed-out section; 3. Observation window; 4. Water inlet pipe; 5. Drain pipe; 6. First electric telescopic rod; 7. First leveling mechanism; 701. Fixing block; 702. Adjusting knob; 703. Adjusting screw; 704. Support leg; 705. First leveling bubble; 706. Second leveling bubble; 8. Second leveling mechanism; 801. First rotating seat; 802. Second electric telescopic rod; 803. Ball joint seat; 804. Third electric telescopic rod; 805. Second rotating seat; 9. Distance measuring mechanism; 901. Distance measuring sensor; 902. Lifting block; 903. First locking nut; 904. Fastening bolt; 905. Guide rod; 906. Second locking nut; 10. Connecting rod; 11. Scale line. Detailed Implementation

[0034] To make the objectives, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] like Figure 1 As shown, this is a prior art radar verification device. A placement plate 2 is placed inside a water tank 1 to support the radar. Both sides of the placement plate 2 along its length are connected to a connecting rod 10 via bolts. The connecting rod 10 is L-shaped, and its end away from the placement plate 2 is connected to the output end of a first electric telescopic rod 6, which is mounted on the side wall of the water tank 1. The first electric telescopic rod 6 drives the placement plate 2 to move along the height of the water tank 1, facilitating the movement of the radar to a designated height. However, the water tank 1 is placed on the ground, which is often uneven, resulting in the water surface in the tank 1 not being horizontal relative to the bottom surface. Since the electromagnetic waves emitted by the radar are cone-shaped, when the water surface is not horizontal relative to the bottom surface of the tank 1, the propagation distance of the radar beam at different positions in the water will deviate. This deviation will lead to inaccurate detection of the electromagnetic wave velocity in the water by the radar, thus affecting the verification result of whether the radar is qualified.

[0037] Furthermore, for large-sized radars, the length can reach 120cm and the width can reach 77cm, while the length of the corresponding mounting plate 2 can reach 150cm. In actual operation, when the two ends of the mounting plate 2 are fixedly connected to the connecting rod 10, the applicant found that the mounting plate 2 exhibits a certain degree of tilt due to its large span in the length direction. This tilt causes differences in the height of different positions of the radar emitting surface relative to the water surface and the bottom of the water tank 1, which in turn leads to deviations in the propagation distance of the radar beam in the water at different positions. As mentioned above, this deviation will cause inaccurate detection of the electromagnetic wave velocity in the water by the radar, thereby affecting the verification results of whether the radar is qualified.

[0038] Example 1

[0039] Please see Figure 2 This invention provides a radar verification device based on a dual-leveling mechanism, comprising a water tank 1. The bottom of the water tank 1 is provided with an inlet pipe 4 and a drain pipe 5, both equipped with valves. The diameter of the drain pipe 5 is larger than the diameter of the inlet pipe 4. The inlet pipe 4 is used to inject purified water into the water tank 1. After radar verification is completed, the purified water in the water tank 1 is discharged through the drain pipe 5.

[0040] Please see Figure 2 and Figure 3 A first leveling mechanism 7 is provided on the outer wall of the water tank 1. The first leveling mechanism 7 is used to level the water tank 1 so that the water surface inside the water tank 1 remains horizontal relative to the bottom surface of the water tank 1. Specifically, the first leveling mechanism 7 includes fixing blocks 701 installed on the bottom of the four sides of the water tank 1. Three of the fixing blocks 701 are threadedly connected to adjusting screws 703 through threaded holes, that is, the number of adjusting screws 703 is three. One adjusting screw 703 is threadedly connected to the fixing block 701 on the side of the water tank 1 corresponding to its width direction, while the other two adjusting screws 703 are threadedly connected to the fixing block 701 on the side of the water tank 1 corresponding to its length direction, and the line connecting the two adjusting screws 703 is parallel to the side of the water tank 1 corresponding to its width direction. The first leveling mechanism 7 further includes a first leveling bubble 705 and a second leveling bubble 706. The axes of the first leveling bubble 705 and the second leveling bubble 706 are perpendicular to each other. The axis of the first leveling bubble 705 is parallel to the side of the water tank 1 corresponding to its length direction, and the axis of the second leveling bubble 706 is parallel to the side of the water tank 1 corresponding to its width direction. Both the first leveling bubble 705 and the second leveling bubble 706 are mounted on a fixing block 701 on the side of the water tank 1 corresponding to its width direction.

[0041] Preferably, an adjustment knob 702 is fixedly connected to the top end of the adjustment screw 703, and a support leg 704 is fixedly connected to the bottom end of the adjustment screw 703. By rotating the adjustment knob 702, the length of the adjustment screw 703 located below the fixed block 701 can be changed, thereby adjusting the water tank 1 horizontally. When the adjustment screw 703 installed on the side corresponding to the width direction of the water tank 1 is adjusted, the first level bubble 705 can be made to show horizontal; when the adjustment screw 703 installed on the side corresponding to the length direction of the water tank 1 is adjusted, the second level bubble 706 can be made to show horizontal. When both the first level bubble 705 and the second level bubble 706 show horizontal, the surface of the water tank 1 is in a horizontal state, and the water surface in the water tank 1 is horizontal relative to the bottom surface of the water tank 1, thereby eliminating the measurement error caused by the water surface in the water tank 1 being non-horizontal relative to the bottom surface of the water tank 1, and improving the accuracy of radar verification.

[0042] Please see Figure 2 and Figure 3 The placement plate 2 has a perforated section 201, which corresponds to the emitting surface of the radar under test. By providing the perforated section 201, when pure water is injected into the water tank 1, the water surface can be made to fit against the bottom surface of the radar under test, thus facilitating contact between the emitting surface of the radar and the water surface. In this way, the electromagnetic waves emitted by the radar under test propagate entirely in the water, instead of traveling a short distance within the placement plate 2, thereby further reducing measurement errors and improving the accuracy of radar verification.

[0043] It should be noted that, due to the heavy weight of the radar under test, the corresponding mounting plate 2 is also thicker to prevent it from bending and deforming under the radar's gravity. If the mounting plate 2 does not have a perforated portion 201, although it is made of acrylic, the electromagnetic waves emitted by the radar can still penetrate the acrylic sheet, but they will propagate a certain distance within the mounting plate 2. Furthermore, the thicker the mounting plate 2, the longer the electromagnetic waves will propagate within it. However, since the wave speeds of electromagnetic waves differ in water, air, and acrylic sheets, and this application compares the measured propagation speed of electromagnetic waves in water with the theoretical propagation speed, if the electromagnetic waves emitted by the radar propagate a short distance within the mounting plate 2, it will affect the accuracy of the measured propagation speed of electromagnetic waves in water.

[0044] It should be further explained that, in order to enable the verification of the radar, a metal plate needs to be installed at the bottom of the water tank 1. Those skilled in the art can place a metal plate corresponding to the placement plate 2 at the bottom of the water tank 1, or the bottom plate 101 of the water tank 1 can be set as a metal plate. Those skilled in the art can determine according to the actual situation, and all of them are within the protection scope of this application.

[0045] To accurately measure the distance between the radar emitting surface and the bottom of the water tank 1, and then precisely calculate the propagation speed of electromagnetic waves in water based on the waveform acquired by the radar, while ensuring that the radar emitting surface is in contact with the water surface, this invention provides a distance measuring mechanism 9 on the placement plate 2. Specifically, as shown... Figure 5 As shown, the distance measuring mechanism 9 includes a distance measuring sensor 901 and a lifting block 902. The distance measuring sensor 901 can be an ultrasonic distance measuring sensor. The outer surface of the distance measuring sensor 901 is provided with threads. The distance measuring sensor 901 first passes through a through hole on the lifting block 902, and then the distance measuring sensor 901 is screwed onto a first locking nut 903 through the threads, thereby fixing the distance measuring sensor 901 onto the lifting block 902. The two ends of the lifting block 902 are slidably engaged with guide rods 905. Fastening bolts 904 are threadedly connected to the side of the lifting block 902. The fastening bolts 904 pass through the lifting block 902 and abut against the guide rods 905. The bottom end of the guide rod 905 is installed on the placement plate 2 through a second locking nut 906, and the bottom end of the placement plate 2 has a through hole corresponding to the distance measuring sensor 901. Understandably, by rotating the fastening bolt 904 so that it no longer presses against the guide rod 905, it is convenient to adjust the height of the lifting block 902 on the guide rod 905, making the bottom of the distance measuring sensor 901 flush with the upper surface of the placement plate 2. Once the distance measuring sensor 901 is in the correct height, tighten the fastening bolt 904 until it presses against the guide rod 905, thus securing the distance measuring sensor 901. After the distance measuring sensor 901 is installed, it can measure the distance between the radar emitting surface and the bottom of the water tank 1; it can also control the solenoid valve on the water inlet pipe 4. When the distance measuring sensor 901 detects that the water surface in the water tank 1 is in contact with the radar emitting surface, it closes the solenoid valve on the water inlet pipe 4 via the controller.

[0046] Please see Figure 3 and Figure 4As mentioned earlier, for large-sized radars, the corresponding placement plate 2 has a large span in the length direction. When both ends of the placement plate 2 are directly connected to the output end of the first electric telescopic rod 6, the placement plate 2 often exhibits a certain degree of tilt. This tilt causes differences in the height of different positions of the radar emitting surface relative to the bottom of the water tank 1, which in turn leads to deviations in the propagation distance of the radar beam in the water at different positions. This deviation causes the radar cone-shaped beam to not propagate completely in the water, resulting in inaccurate measurement of the electromagnetic wave velocity in the water by the radar, thus affecting the verification results of whether the radar is qualified. Therefore, the present invention also includes a second leveling mechanism 8, which is used to level the placement plate 2 so that the placement plate 2 is horizontal relative to the water surface. The second leveling mechanism 8 includes a second electric telescopic rod 802 and a third electric telescopic rod 804 respectively disposed on both sides of the placement plate 2 along its length. The telescopic ends of the second electric telescopic rod 802 and the third electric telescopic rod 804 are rotatably connected to ball joint seats 803 on both sides of the placement plate 2. The ends of the second electric telescopic rod 802 and the third electric telescopic rod 804 away from the ball joint seats 803 are rotatably connected to the first rotating seat 801 and the second rotating seat 805 respectively via pins. The corresponding pins are parallel to the width and length directions of the placement plate 2, and the second electric telescopic rod 802 and the third electric telescopic rod 804 are staggered along the width direction of the placement plate 2. The first rotating seat 801 and the second rotating seat 805 are both connected to the connecting rod 10, which is L-shaped. The top end of the connecting rod 10 is connected to the output end of the first electric telescopic rod 6, which is installed on the outer surface of the water tank 1.

[0047] Furthermore, the placement plate 2 has scale lines 11 extending along its height direction on two adjacent sides, with the scale lines 11 located at both ends of the side of the placement plate 2. The water tank 1 has an observation window 3 corresponding to the scale lines 11. Preferably, the observation window 3 is made of a high-transparency glass material; for example, the observation window 3 can be made of ultra-clear glass. Since the water tank 1 has been leveled by the first leveling mechanism 7, the water surface in the water tank 1 is horizontal relative to the bottom surface of the water tank 1. When the second electric telescopic rod 802 is driven to extend or retract, if the scale line 11 at both ends of the side of the placement plate 2 corresponding to the length direction is the same as the scale corresponding to the water surface, it indicates that the length direction of the placement plate 2 is horizontal. Then, the third electric telescopic rod 804 is driven to extend or retract. If the scale line 11 at both ends of the side of the placement plate 2 corresponding to the width direction is the same as the scale corresponding to the water surface, it indicates that the width direction of the placement plate 2 is also horizontal, thus realizing the leveling operation of the placement plate 2. This ensures that the transmitting surface of the radar placed on the placement plate 2 is horizontal relative to the water surface in the water tank 1, thereby ensuring that the cone-shaped beam emitted by the radar propagates completely in the water, thus realizing high-precision verification of large-size radar.

[0048] It should be noted that this invention uses the scale lines 11 set on two adjacent sides of the placement plate 2 as a reference, rather than relying on installing multiple distance measuring sensors 901 on the placement plate 2 and judging whether the placement plate 2 is leveled based on whether the distances detected by these distance measuring sensors 901 are deviated. On the one hand, this effectively saves the cost required to arrange multiple distance measuring sensors 901. On the other hand, this invention uses the scale lines 11 as a reference, which makes it easier to keep the scale lines set at both ends of the side of the placement plate 2 consistent during installation and setting, thereby effectively avoiding errors caused by installation differences. Therefore, leveling is based on whether the scale lines 11 at both ends of the side of the placement plate 2 are the same as the scale corresponding to the water surface, which can achieve convenient and accurate leveling operation.

[0049] Example 2

[0050] The present invention also provides a radar verification method based on a dual-leveling mechanism, implemented by the radar verification device described in Example 1, comprising the following steps:

[0051] The water tank 1 is leveled by the first leveling mechanism 7 so that the water surface in the water tank 1 remains horizontal relative to the bottom surface of the water tank 1.

[0052] The first electric telescopic rod 6 drives the placement plate 2 to move to a specified height, and the distance measuring mechanism 9 measures the distance between the transmitting surface of the radar to be tested and the bottom of the water tank 1.

[0053] Add water to water tank 1 until the water level reaches the radar's transmitting surface;

[0054] Place the radar to be tested on placement plate 2;

[0055] The radar test begins, measuring the propagation speed of the electromagnetic waves emitted by the radar in the water. The measured propagation speed is then compared with the theoretical propagation speed to verify whether the radar is up to standard.

[0056] Optionally, after the step of leveling the water tank 1 using the first leveling mechanism 7 so that the water level in the water tank 1 remains horizontal relative to the bottom surface of the water tank 1, the method further includes:

[0057] The placement plate 2 is leveled by the second leveling mechanism 8 so that the placement plate 2 remains horizontal relative to the water surface in the water tank 1.

[0058] Optionally, leveling the placement plate 2 using the second leveling mechanism 8 to keep the placement plate 2 horizontal relative to the water surface in the water tank 1 specifically includes:

[0059] Add water to water tank 1 until the water level reaches mark 11;

[0060] Observe through the observation window 3 whether the scale lines 11 at both ends of the side of the placement plate 2 along its length are the same as the scale corresponding to the water surface.

[0061] If not, drive the second electric telescopic rod 802 to extend or retract until the scale lines 11 at both ends of the side of the placement plate 2 in the length direction are the same as the scale corresponding to the water surface.

[0062] Observe through the observation window 3 whether the scale lines 11 on both sides of the side of the placement plate 2 in the width direction are the same as the scale corresponding to the water surface;

[0063] If not, drive the third electric telescopic rod 804 to extend or retract until the scale lines 11 on both ends of the side of the placement plate 2 in the width direction are the same as the scale corresponding to the water surface.

[0064] Understandably, the present invention first levels the water tank 1 using the first leveling mechanism 7, so that the water surface in the water tank 1 remains horizontal relative to the bottom surface of the water tank 1; then, it levels the placement plate 2 based on the water surface in the water tank 1, so that the placement plate 2 is horizontal relative to the water surface in the water tank 1, and thus makes the placement plate 2 horizontal relative to the bottom surface of the water tank 1; in this way, it is ensured that the cone-shaped beam emitted by the radar propagates completely in the water, and the distance from different positions of the cone-shaped beam emitted by the radar to the bottom surface of the water tank 1 remains equal, thereby achieving high-precision verification of large-size radar. Furthermore, this invention uses the scale lines 11 set on two adjacent sides of the placement plate 2 as a reference, rather than relying on installing multiple distance measurement sensors 901 on the placement plate 2 for leveling. On the one hand, this effectively saves the cost required to arrange multiple distance measurement sensors 901. On the other hand, using the scale lines 11 as a reference, compared to using multiple distance measurement sensors 901 as a reference, makes it easier for the scale lines set at both ends of the side of the placement plate 2 to maintain consistency during installation and setup, thereby effectively avoiding errors caused by installation differences. Therefore, leveling is performed based on whether the scale lines 11 at both ends of the side of the placement plate 2 are the same as the scale corresponding to the water surface, which can achieve convenient and accurate leveling operation.

[0065] Optionally, the step of measuring the distance between the transmitting surface of the radar to be detected and the bottom of the water tank 1 by the distance measuring mechanism 9 includes:

[0066] After rotating the fastening bolt 904 so that the fastening bolt 904 is no longer in contact with the guide rod 905, adjust the height of the lifting block 902 on the guide rod 905;

[0067] After the bottom of the distance measuring sensor 901 is flush with the upper surface of the placement plate 2, tighten the fastening bolt 904 so that the fastening bolt 904 abuts against the guide rod 905.

[0068] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0069] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0070] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A radar verification device based on a dual-leveling mechanism, characterized in that, include: Water tank (1); Placement plate (2), used to place the radar body; The first electric telescopic rod (6) is used to drive the placement plate (2) to move along the height direction of the water tank (1); Distance measuring mechanism (9), which is used to measure the distance between the transmitting surface of the radar body and the bottom of the water tank (1); The first leveling mechanism (7) is used to level the water tank (1) so that the water surface in the water tank (1) remains horizontal relative to the bottom surface of the water tank (1). The second leveling mechanism (8) is used to level the placement plate (2). The second leveling mechanism (8) includes a second electric telescopic rod (802) and a third electric telescopic rod (804) respectively disposed on both sides of the length direction of the placement plate (2). The telescopic ends of the second electric telescopic rod (802) and the third electric telescopic rod (804) are rotatably connected to the ball hinge seats (803) on both sides of the placement plate (2). The ends of the second electric telescopic rod (802) and the third electric telescopic rod (804) away from the ball hinge seats (803) are rotatably connected to the first rotating seat (801) and the second rotating seat (805) respectively through pins. The corresponding pins are parallel to the width direction and the length direction of the placement plate (2) respectively. The second electric telescopic rod (802) and the third electric telescopic rod (804) are staggered along the width direction of the placement plate (2). The first rotating seat (801) and the second rotating seat (805) are both connected to the output end of the first electric telescopic rod (6). The placement plate (2) has at least two adjacent sides with scale lines (11) extending along the height direction of the placement plate (2), and the scale lines (11) are located at both ends of the side of the placement plate (2). The water tank (1) is provided with an observation window (3) corresponding to the scale lines (11). The radar verification device based on the dual-leveling mechanism performs the verification process, including the following steps: Step S101: Level the water tank (1) using the first leveling mechanism (7) so that the water surface in the water tank (1) remains horizontal relative to the bottom surface of the water tank (1); Step S102: Level the placement plate (2) using the second leveling mechanism (8) so that the placement plate (2) remains horizontal relative to the water surface in the water tank (1); Step S103: Move the placement plate (2) to a specified height by using the first electric telescopic rod (6), and measure the distance between the transmitting surface of the radar to be tested and the bottom of the water tank (1) by using the distance measuring mechanism (9); Step S104: Add water to the water tank (1) until the water level reaches the radar's transmitting surface; Step S105: Place the radar to be tested on the placement plate (2); Step S106: Start radar detection and measure the propagation speed of electromagnetic waves emitted by the radar in water; compare the measured propagation speed of electromagnetic waves in water with the theoretical propagation speed of electromagnetic waves in water to check whether the radar is qualified. Specifically, step S102, which involves leveling the placement plate (2) using the second leveling mechanism (8) to ensure that the placement plate (2) remains horizontal relative to the water surface in the water tank (1), includes: Add water to the water tank (1) until the water level reaches the scale line (11); Observe through the observation window (3) whether the scale lines (11) on both sides of the side corresponding to the length direction of the placement plate (2) are the same as the scale corresponding to the water surface; If not, drive the second electric telescopic rod (802) to extend or retract until the scale lines (11) on both sides of the placement plate (2) in the length direction are the same as the scale corresponding to the water surface. Observe through the observation window (3) whether the scale lines (11) on both sides of the side corresponding to the width direction of the placement plate (2) are the same as the scale corresponding to the water surface; If not, drive the third electric telescopic rod (804) to extend or retract until the scale lines (11) on both ends of the side of the placement plate (2) in the width direction are the same as the scale corresponding to the water surface.

2. The radar verification device based on a dual-leveling mechanism according to claim 1, characterized in that: The placement plate (2) has a hollow part (201) which corresponds to the emitting surface of the radar body.

3. The radar verification device based on a dual-leveling mechanism according to claim 1, characterized in that: The first leveling mechanism (7) includes a fixing block (701), which is installed on the bottom of the side of the water tank (1). The fixing block (701) is threaded with an adjusting screw (703) through a threaded hole. There are three adjusting screws (703), and the distance between one adjusting screw (703) and the other two adjusting screws (703) is equal.

4. The radar verification device based on a dual-leveling mechanism according to claim 3, characterized in that: The first leveling mechanism (7) further includes a first leveling bubble (705) and a second leveling bubble (706). The axes of the first leveling bubble (705) and the second leveling bubble (706) are perpendicular to each other, and the axis of the second leveling bubble (706) is parallel to the line connecting the two adjusting screws (703) on the side of the water tank (1) along the length direction.

5. A radar verification device based on a dual-leveling mechanism according to claim 3, characterized in that: The top end of the adjusting screw (703) is fixedly connected to an adjusting knob (702), and the bottom end of the adjusting screw (703) is fixedly connected to a support foot (704).

6. The radar verification device based on a dual-leveling mechanism according to claim 1, characterized in that: The distance measuring mechanism (9) includes a distance measuring sensor (901). The distance measuring sensor (901) is installed on the lifting block (902) by a first locking nut (903). The two ends of the lifting block (902) are slidably engaged with the guide rod (905). The lifting block (902) is threaded with a fastening bolt (904). The fastening bolt (904) passes through the lifting block (902) and abuts against the guide rod (905). The bottom end of the guide rod (905) is installed on the placement plate (2) by a second locking nut (906). The bottom end of the placement plate (2) is provided with a through hole corresponding to the distance measuring sensor (901).

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