A high-precision verification device and verification method for engineering radar

Abstract

The present invention provides a high-precision verification device and verification method for engineering radar, including a radar antenna body and a metal-coated reflector, two distance sensors are arranged side by side between the radar antenna body and the metal-coated reflector, and the central axis of the distance sensor is perpendicular to the surface of the metal-coated reflector; and also includes an adjustment mechanism, the adjustment mechanism is used to drive the clamping mechanism to rotate around the vertical direction so that the distances monitored by each distance sensor are equal, and the distance monitored by the distance sensor is the distance between the distance sensor and the radar antenna body. The present invention sets an adjustment mechanism to slow down the rotation speed of the rotating column, realizes fine adjustment and fine tuning of the radar antenna body, cooperates with the distance information monitored by the two distance sensors in real time, drives the direction of the emitting surface of the radar antenna body to face the metal-coated reflector, thereby ensuring the accuracy of the measurement of the velocity of radar electromagnetic waves in the air.

Description

Technical Field

[0001] The present invention relates to the field of radar detection technology, and in particular to a high-precision verification device and a verification method for an engineering radar. Background Art

[0002] The wave velocity measurement method in the air of engineering radar and supporting antennas for road surface, bridge and tunnel inspection is as follows:

[0003] An auxiliary device for measuring electromagnetic wave velocity in the air is used: it is mainly composed of a fixture, a radar antenna fixing frame, a base and a metal-coated reflector. The area of ​​the metal-coated reflector should be no less than 4 times the area of ​​the bottom surface of the engineering radar antenna. The radar antenna is manually lifted and placed on the base, with the bottom surface of the antenna facing the metal-coated reflector. The distance between the bottom surface of the antenna and the metal-coated reflector is no less than 60cm (measured with a tape measure). The average value is taken as the standard value (L) of the distance between the bottom surface of the ground penetrating radar antenna and the metal-coated reflector. Start collecting data. After 1 minute of collection, the radar electromagnetic wave two-way travel time is obtained according to the radar electromagnetic wave detection waveform collected by the radar antenna. Then, the average value of the measured radar electromagnetic wave velocity is calculated according to the distance standard value (L) and the radar wave two-way travel time. It is compared with the standard value of the electromagnetic wave velocity in the air. By calculating whether the relative error meets the relevant requirements of the equipment or specifications, a verification conclusion is made as to whether the engineering radar and the supporting antenna are qualified.

[0004] The above radar electromagnetic wave velocity measurement device and method in the air have the following shortcomings:

[0005] (1) After the radar antenna is placed stably on the base, without any auxiliary measures, it is difficult to ensure that the bottom surface (emitting surface) of the radar antenna is exactly perpendicular to the metal-coated reflector. In other words, it is difficult for the bottom surface (emitting surface) of the radar antenna to accurately face the metal-coated reflector. Once the bottom surface (emitting surface) of the antenna is not completely facing the metal-coated reflector, the distance between the bottom surface (emitting surface) of the antenna and the metal-coated reflector measured by the steel tape measure will be inconsistent with the actual distance in space from the electromagnetic wave emitted by the bottom surface (emitting surface) of the antenna to the metal-coated reflector. Therefore, the accuracy of the measurement of the electromagnetic wave velocity in the air cannot be guaranteed, resulting in deviations in the measurement of the electromagnetic wave velocity in the air.

[0006] (2) When manually measuring the distance between the bottom surface (emitting surface) of the radar antenna and the metal-coated reflector with a tape measure, measurement errors will occur due to subjective judgment and limited line of sight. It is impossible to accurately measure the actual distance between the bottom surface (emitting surface) of the radar antenna and the metal-coated reflector, and it is also impossible to guarantee the accuracy of the measurement results of the electromagnetic wave velocity in the air. That is, the existing methods have low accuracy.

[0007] (3) Conventional methods have a low degree of automation. Summary of the invention

[0008] The purpose of the present invention is to improve and innovate the shortcomings and problems existing in the background technology, and to provide a high-precision verification device and verification method for engineering radar.

[0009] According to a first aspect of the present invention, there is provided an engineering radar high-precision verification device, comprising:

[0010] Radar antenna body;

[0011] A clamping mechanism, wherein the clamping mechanism is used to fix the radar antenna body;

[0012] A metal-coated reflector, wherein the metal-coated reflector is used to reflect radar electromagnetic waves emitted by the radar antenna body;

[0013] The distance sensor is provided with at least two distance sensors, and the distance sensors are arranged side by side between the radar antenna body and the metal-coated reflector, and the central axis of the distance sensor is perpendicular to the surface of the metal-coated reflector;

[0014] A moving mechanism, wherein the moving mechanism is used to drive the metal-coated reflector and the distance sensor to move closer to or farther away from the radar antenna body, so as to change the distance between the emitting surface of the radar antenna body and the metal-coated reflector;

[0015] A telescopic rod, the telescopic rod is used to drive the distance sensor to move up and down;

[0016] The adjusting mechanism is used to drive the clamping mechanism to rotate around the vertical direction so that the distances monitored by the various distance sensors are equal. The distances monitored by the distance sensors are the distances between the distance sensors and the radar antenna body.

[0017] A further solution is that the adjustment mechanism includes a second fixed column, the outer surface of the second fixed column is interference fit with a bearing, the outer ring of the bearing is mounted on the inner surface of the rotating column, the inner surface of the rotating column is also mounted with a first internal meshing gear, the rotating column is used to drive the clamping mechanism to rotate, the first internal meshing gear is meshingly connected with a fifth gear, the fifth gear is meshingly connected with a fourth gear, a third gear is also mounted on the gear shaft of the fourth gear, and the third gear is meshingly connected with the second gear; the second gear is arranged at the center position of the inner cavity of the rotating column, the second gear is driven to rotate by the driving mechanism, and the diameter of the third gear is greater than the diameter of the second gear.

[0018] A further solution is that a first protrusion is provided at the upper end of the second fixed column, the gear shaft of the fifth gear is rotatably connected to the first protrusion, a second support plate is installed on the inner wall of the second fixed column, and the gear shaft of the fourth gear is installed on the second support plate.

[0019] A further solution is that a first fixing column is installed at the bottom end of the second fixing column, a first support plate is installed inside the first fixing column, the gear shaft of the second gear is rotatably connected to the first support plate, the driving mechanism includes a first gear, the first gear is installed at the bottom end of the gear shaft of the second gear, the first gear is meshedly connected with a sixth gear, the diameter of the sixth gear is smaller than the diameter of the first gear, a first bevel gear is installed at the bottom end of the gear shaft of the sixth gear, the first bevel gear is meshedly connected with the second bevel gear, and the inner ring of the second bevel gear is interference fit with a rotating shaft.

[0020] A further solution is that a second protrusion is provided on the top of the first fixed column so that the outer surface of the upper end of the first fixed column is flush with the bottom end of the rotating column, the outer surface of the top end of the first fixed column is provided with scale lines, and the bottom end of the rotating column is provided with a pointer corresponding to the scale lines.

[0021] A further solution is that the outer surface of the first fixed column is fixedly connected to the limiting sleeve, the inner ring of the limiting sleeve is installed with a second internal meshing gear, the end of the rotating shaft extends into the limiting sleeve and is sleeved with a movable sleeve, the outer surface of the movable sleeve is installed with a seventh gear adapted to the second internal meshing gear, the end of the rotating shaft is also clamped with a retaining ring, a spring is arranged between the retaining ring and the movable sleeve, a limiting strip is installed on the inner surface of the movable sleeve, a limiting groove matching the limiting strip is opened on the outer surface of the rotating shaft, and a driving disk is installed at the end of the movable sleeve.

[0022] A further solution is that the moving mechanism includes a slider, the lower surface of the slider slidingly cooperates with the slide groove on the base, the metal-coated reflective plate and the telescopic rod are installed on the slider, and the base is rotatably connected to a first screw rod, the middle part of the first screw rod passes through the slider and is threadedly connected to it.

[0023] A further solution is that a fixing seat is threadedly connected to the top end of the telescopic rod, lugs are symmetrically installed on both sides of the fixing seat, and the distance sensor is threadedly connected to the lugs.

[0024] A further solution is that the clamping mechanism includes a fixing frame, a second screw rod is rotatably connected to the top wall of the fixing frame, and a clamping plate is installed at the bottom end of the second screw rod.

[0025] According to a second aspect of the present invention, there is provided a method for high-precision verification of an engineering radar, which is implemented by any of the above-described devices and comprises the following steps:

[0026] Fix the radar antenna body by means of a clamping mechanism;

[0027] Extend the telescopic rod so that the distance sensor is directly opposite to the radar antenna body;

[0028] The direction of the emitting surface of the radar antenna body is finely adjusted by the adjustment mechanism until the distances monitored by the distance sensors are equal, and the distances monitored by the distance sensors are recorded as the first distance;

[0029] The telescopic rod is retracted to prevent the distance sensor from blocking the radar antenna body from transmitting radar electromagnetic waves to the metal-coated reflector, and the two-way travel time of the first radar wave detected by the radar antenna body is recorded;

[0030] The moving mechanism is triggered to make the metal-coated reflector and the distance sensor approach or move away from the radar antenna body, so as to adjust the distance between the radar antenna body and the metal-coated reflector and the distance sensor; the telescopic rod is then extended, and the distance monitored by the distance sensor after the distance adjustment is recorded as the second distance;

[0031] Then retract the telescopic rod and record the two-way travel time of the second radar wave detected by the radar antenna body after the spacing adjustment;

[0032] The radar electromagnetic wave velocity is calculated according to the first distance, the second distance, the first radar wave two-way travel time and the second radar wave two-way travel time;

[0033] The first radar wave round-trip time and the second radar wave round-trip time are the time taken for the radar electromagnetic wave to travel back and forth between the radar antenna body and the metal-coated reflector.

[0034] Compared with the prior art, the present invention has the following beneficial effects: (1) the present invention sets an adjustment mechanism to slow down the rotation speed of the rotating column, thereby enabling fine adjustment and precise adjustment of the radar antenna body, and cooperating with the distance information monitored in real time by the two distance sensors to drive the emitting surface of the radar antenna body to face the metal-coated reflector completely, thereby ensuring the accuracy of the measurement of the radar electromagnetic wave velocity in the air;

[0035] (2) The present invention arranges the metal-coated reflector and the distance sensor on a moving mechanism so that the moving mechanism can simultaneously drive the metal-coated reflector and the distance sensor to approach or move away from the radar antenna body. Thus, without having to measure the distance between the distance sensor and the metal-coated reflector, the velocity of the radar electromagnetic wave in the air can be accurately measured. This avoids the inconvenience of measuring the distance between the distance sensor and the metal-coated reflector and further improves the verification accuracy of the radar antenna body, thereby achieving high-precision verification of the radar antenna body. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a structural schematic diagram of a high-precision verification device for an engineering radar provided by an embodiment of the present invention;

[0038] Figure 2 is a schematic cross-sectional structure diagram of an adjustment mechanism provided by an embodiment of the present invention;

[0039] Figure 3 is a schematic cross-sectional structure diagram of a limit sleeve provided in an embodiment of the present invention;

[0040] Figure 4 The embodiment of the present invention provides Figure 3 Schematic diagram of the local cross-section structure at AA in the middle;

[0041] Figure 5 It is a front structural schematic diagram of the telescopic rod and the distance sensor provided in the embodiment of the present invention.

[0042] Figure numerals: 1, base; 2, moving mechanism; 3, adjusting mechanism; 4, bracket; 5, clamping mechanism; 6, radar antenna body; 7, distance sensor; 8, lug; 9, metal-coated reflector; 10, fixing seat; 11, telescopic rod; 201, first screw rod; 202, slider; 301, first fixing column; 302, first supporting plate; 303, first gear; 304, second gear; 305, third gear; 306, fourth gear; 307, fifth gear; 308, first internal gear ; 309, rotating column; 310, bearing; 311, second fixed column; 312, second support plate; 313, sixth gear; 314, first bevel gear; 315, rotating shaft; 316, second bevel gear; 317, limiting sleeve; 318, second internal meshing gear; 319, seventh gear; 320, movable sleeve; 321, limiting strip; 322, driving disk; 323, limiting groove; 324, spring; 325, retaining ring; 501, fixing frame; 502, second screw rod; 503, clamping plate. DETAILED DESCRIPTION

[0043] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0045] See also Figure 1-Figure 5 The present invention provides a high-precision engineering radar verification device, comprising a base 1, wherein support legs are arranged at the four corners of the lower surface of the base 1. An adjustment mechanism 3 and a moving mechanism 2 are arranged on the left and right sides of the upper surface of the base 1, respectively.

[0046] The moving mechanism 2 includes a slider 202, the lower surface of which is slidably matched with a slide groove provided on the upper surface of the base 1; a first screw rod 201 is rotatably connected to the base 1, the middle of the first screw rod 201 passes through the slider 202 and is threadedly connected thereto, and a telescopic rod 11 and a metal-coated reflective plate 9 are sequentially installed on the upper surface of the slider 202 from left to right. By rotating the first screw rod 201, the slider 202 can be driven to approach or move away from the adjustment mechanism 3, thereby adjusting the distance between the telescopic rod 11 and the metal-coated reflective plate 9 and the adjustment mechanism 3; it should be noted that in the process of the first screw rod 201 driving the slider 202 to approach or move away from the adjustment mechanism 3, the distance between the telescopic rod 11 and the metal-coated reflective plate 9 will not change.

[0047] See also Figure 5 The telescopic rod 11 can be an electric telescopic rod or a manual telescopic rod, and a fixing seat 10 is detachably mounted on the top of the telescopic rod 11; specifically, the upper end of the telescopic rod 11 is threadedly connected to the lower surface of the fixing seat 10. Lugs 8 are symmetrically mounted on both sides of the fixing seat 10, and the distance sensors 7 are threadedly connected to the lugs 8; the two distance sensors 7 have the same model and size, and the distance sensor 7 can be a laser distance sensor or an ultrasonic distance sensor, etc., with high precision and real-time performance. The central axis of the distance sensor 7 is perpendicular to the surface of the metal-coated reflector 9, and the distances between the two distance sensors 7 and the metal-coated reflector 9 are equal. When the telescopic rod 11 is a manual telescopic rod, the telescopic length of the telescopic rod 11 can be adjusted after loosening the fastening bolts on the telescopic rod 11; wherein, in order to prevent the movable end of the telescopic rod 11 from rotating relative to the fixed end of the telescopic rod 11, thereby causing the distance sensor 7 to rotate relative to the metal-coated reflective plate 9, ribs can be provided on the outer surface of the movable end of the telescopic rod 11, and matching strip grooves can be provided on the inner surface of the fixed end of the telescopic rod 11. The ribs and the strip grooves cooperate with each other, thereby preventing the movable end of the telescopic rod 11 from rotating relative to the fixed end of the telescopic rod 11.

[0048] Please continue reading Figure 1 The adjusting mechanism 3 is fixedly connected with a clamping mechanism 5 through a bracket 4. The clamping mechanism 5 is used to fix the radar antenna body 6, and the metal-coated reflector 9 is used to reflect the radar electromagnetic waves emitted by the radar antenna body 6. Among them, the adjusting mechanism 3 is used to drive the clamping mechanism 5 to rotate around the vertical direction, that is, the adjusting mechanism 3 is used to drive the radar antenna body 6 to rotate around its own height direction; the clamping mechanism 5 includes a fixing frame 501, the fixing frame 501 is in a U shape, a second lead screw 502 is rotatably connected to the top wall of the fixing frame 501, and a clamping plate 503 is installed at the bottom end of the second lead screw 502; when the radar antenna body 6 is placed inside the fixing frame 501, by rotating the second lead screw 502 to drive the clamping plate 503 to move downward, the radar antenna body 6 can be fixed on the fixing frame 501. It should be noted that at this time, the emitting surface of the radar antenna body 6 may not be exactly facing the metal-coated reflector 9, and the emitting surface of the radar antenna body 6 may be obliquely facing the metal-coated reflector 9. As mentioned above, once the emitting surface of the radar antenna body 6 is not completely facing the metal-coated reflector 9, the accuracy of measuring the radar electromagnetic wave velocity in the air cannot be guaranteed, and at this time, the distances between the two distance sensors 7 and the radar antenna body 6 are not equal. Therefore, during the process of driving the radar antenna body 6 to rotate around its own height direction by the adjusting mechanism 3, by cooperating with the two distance sensors 7 to monitor the distance from the radar antenna body 6 in real time, the emitting surface of the radar antenna body 6 can be adjusted to be exactly facing the surface of the metal-coated reflector 9, so as to accurately measure the radar electromagnetic wave velocity of the radar antenna body 6 and judge whether the quality of the radar antenna body 6 is qualified.

[0049] It should be noted that during the process of driving the emitting surface of the radar antenna body 6 to face the surface of the metal-coated reflector 9 by the adjusting mechanism 3, fine adjustment and precise adjustment need to be performed on the radar antenna body 6 to adjust the emitting surface of the radar antenna body 6 in place. Therefore, as Figure 2As shown, the adjustment mechanism 3 includes a second fixed column 311, and the outer surface of the second fixed column 311 is interference-fitted with a bearing 310. The outer ring of the bearing 310 is mounted on the inner surface of the rotating column 309. The rotating column 309 is located at the periphery of the second fixed column 311. The fixing frame 501 of the clamping mechanism 5 is mounted on the upper surface of the rotating column 309 through the bracket 4. The rotating column 309 is used to drive the fixing frame 501 to rotate. A first internal meshing gear 308 is also mounted on the inner surface of the rotating column 309. The first internal meshing gear 308 is meshedly connected with a fifth gear 307. The fifth gear 307 is meshedly connected with a fourth gear 306. A third gear 305 is also mounted on the gear shaft of the fourth gear 306. The third gear 305 is meshedly connected with a second gear 304. The second gear 304 is arranged at the center of the inner cavity of the rotating column 309. The second gear 304 is driven to rotate by the driving mechanism, and the diameter of the third gear 305 is greater than the diameter of the second gear 304. Since the diameter of the third gear 305 is greater than that of the second gear 304, the angular velocity of the third gear 305 is less than that of the second gear 304, and the third gear 305 and the fourth gear 306 are installed on the same gear shaft, and the angular velocities of the two are the same, and the fourth gear 306 is meshed with the first internal gear 308 through the fifth gear 307, which is conducive to reducing the radius of the fourth gear 306, so that the radius of the fourth gear 306 is much smaller than the radius of the first internal gear 308, so that the rotation speed of the rotating column 309 is slow, which facilitates the fine adjustment and precision adjustment of the radar antenna body 6.

[0050] Among them, a first protrusion is provided at the upper end of the second fixed column 311, and the first protrusion extends outward relative to the second fixed column 311, so that the gear shaft of the fifth gear 307 can be rotatably connected to the first protrusion, thereby facilitating the installation of the fifth gear 307, and a second support plate 312 is installed on the inner wall of the second fixed column 311, and the gear shaft of the fourth gear 306 is rotatably connected to the second support plate 312.

[0051] Further, the first fixing column 301 is installed at the bottom end of the second fixing column 311, and a plurality of first supporting plates 302 are installed inside the first fixing column 301, and the gear shaft of the second gear 304 is rotatably connected to the first supporting plate 302. The driving mechanism includes a first gear 303, and the first gear 303 is installed at the bottom end of the gear shaft of the second gear 304; the first gear 303 is meshedly connected with a sixth gear 313, and the diameter of the sixth gear 313 is smaller than the diameter of the first gear 303, that is, the angular velocity of the sixth gear 313 is greater than the angular velocity of the first gear 303, and the bottom end of the gear shaft of the sixth gear 313 is installed with a first bevel gear 314, and the first bevel gear 314 is meshedly connected with a second bevel gear 316, and the inner ring of the second bevel gear 316 is interference-fitted with a rotating shaft 315. It can be understood that by extending the bottom end of the gear shaft of the second gear 304 into the first fixed column 301, the installation positions of the first gear 303, the sixth gear 313 and the rotating shaft 315 are not restricted by other gears and the bearing 310, which is beneficial to increase the radius of the first gear 303 and make the device structure compact; since the radius of the first gear 303 is greater than the radius of the sixth gear 313; therefore, after rotating the rotating shaft 315, the rotation speed of the rotating column 309 will be slower, and the adjustment effect on the radar antenna body 6 will be better.

[0052] For further information, see Figure 3-Figure 4 The outer wall side of the first fixed column 301 is fixedly installed with a limit sleeve 317, and the inner ring of the limit sleeve 317 is installed with a second internal gear 318. The end of the rotating shaft 315 extends into the limit sleeve 317 and is then sleeved with a movable sleeve 320. The outer surface of the movable sleeve 320 is installed with a seventh gear 319 adapted to the second internal gear 318. The end of the rotating shaft 315 is also clamped with a snap ring 325, and a spring 324 is arranged between the snap ring 325 and the movable sleeve 320. A limit strip 321 is installed on the inner surface of the movable sleeve 320, and a limit groove 323 matching the limit strip 321 is opened on the outer surface of the rotating shaft 315. A driving disk 322 is installed at the end of the movable sleeve 320. After holding the driving disk 322 and pushing the driving disk 322 close to the limiting sleeve 317, the seventh gear 319 is disengaged from the second internal gear 318, and the driving disk 322 can be rotated at this time. Due to the mutual transmission of the gears, the angular velocity of the rotation of the rotating column 309 is significantly lower than the angular velocity of the rotation of the driving disk 322; therefore, in the embodiment, the driving disk 322 is rotated to drive the rotating column 309 to rotate slowly until the distance sensor 7 detects that the emitting surface of the radar antenna body 6 is completely opposite to the metal-coated reflector 9; at this time, the driving disk 322 is no longer held, and under the reset action of the spring 324, the seventh gear 319 can re-engage with the second internal gear 318, limiting the driving disk 322 from rotating, so that the position of the radar antenna body 6 remains stable after it is rotated into place.

[0053] Optionally, a second protrusion is provided at the top of the first fixed column 301 so that the outer surface of the upper end of the first fixed column 301 is flush with the bottom end of the rotating column 309. The outer surface of the top end of the first fixed column 301 is provided with scale lines, and the bottom end of the rotating column 309 is provided with a pointer corresponding to the scale lines. Referring to the position of the scale lines indicated by the pointer, the position of the radar antenna body 6 can be adjusted into place.

[0054] The present invention also provides a high-precision verification method for engineering radar, which is implemented by the above-mentioned device and includes the following steps:

[0055] The radar antenna body 6 is fixed by the clamping mechanism 5. At this time, the emitting surface of the radar antenna body 6 is often not completely opposite to the metal-coated reflector 9;

[0056] Extend the telescopic rod 11 to raise the height of the distance sensor 7 so that the two distance sensors 7 are directly opposite to the radar antenna body 6. At this time, the distances detected by the two distance sensors 7 will have a certain deviation;

[0057] The clamping mechanism 5 is driven to rotate slowly around the vertical direction by the adjusting mechanism 3 to fine-tune the emitting surface of the radar antenna body 6 until the distances monitored by the distance sensors 7 are equal, and the distances monitored by the distance sensors 7 at this time are recorded as the first distance L1;

[0058] The telescopic rod 11 is retracted to prevent the distance sensor 7 from blocking the radar antenna body 6 from transmitting radar electromagnetic waves to the metal-coated reflector 9, and the two-way travel time t1 of the first radar wave monitored by the radar antenna body 6 is recorded;

[0059] The moving mechanism 2 is triggered to make the metal-coated reflector 9 and the distance sensor 7 move closer to or farther from the radar antenna body 6, so as to adjust the distance between the radar antenna body 6 and the metal-coated reflector 9 and the distance sensor 7; the telescopic rod 11 is then extended, and the distance monitored by the distance sensor 7 after the distance adjustment is recorded as the second distance L2;

[0060] Then retract the telescopic rod 11, and record the two-way travel time t2 of the second radar wave monitored by the radar antenna body 6 after the spacing adjustment;

[0061] The radar electromagnetic wave velocity corresponding to the radar antenna body 6 is calculated according to the first distance L1, the second distance L2, the first radar wave two-way travel time t1 and the second radar wave two-way travel time t2; wherein the first radar wave two-way travel time and the second radar wave two-way travel time are the time taken for the radar electromagnetic wave to travel back and forth between the radar antenna body 6 and the metal-coated reflector 9.

[0062] It should be noted that the calculation formula for the radar electromagnetic wave velocity is as follows:

[0063] (1);

[0064] Wherein, v represents the velocity of radar electromagnetic wave, L represents the distance between radar antenna body 6 and distance sensor 7, and L 0 represents the distance between the distance sensor 7 and the metal-coated reflector 9, and t represents the two-way travel time of the radar wave; since the moving mechanism 2 drives the distance sensor 7 and the metal-coated reflector 9 to move together, the distance between the two remains unchanged, that is, L 0 Is a fixed value.

[0065] In this embodiment, the radar antenna body 6 is set to collect data for 1 min each time, so as to obtain a radar electromagnetic wave detection waveform diagram; multiple radar wave two-way travel times (ns) can be obtained in the radar detection waveform diagram, and the average value of the multiple radar wave two-way travel times is calculated to obtain the final radar wave two-way travel time t.

[0066] Substituting the corresponding first distance L1, second distance L2, first radar wave two-way travel time t1 and second radar wave two-way travel time t2 into the above formula, we get:

[0067] (2);

[0068] (3);

[0069] Combining formulas (2) and (3), the radar electromagnetic wave velocity corresponding to the radar antenna body 6 can be calculated; therefore, the present application does not need to additionally measure the distance L between the distance sensor 7 and the metal-coated reflector 9. 0 This not only avoids the inconvenience of measuring the distance between the distance sensor 7 and the metal-coated reflector 9, but also improves the verification accuracy of the radar antenna body 6, thereby achieving high-precision verification of the radar antenna body 6.

[0070] After the radar electromagnetic wave velocity corresponding to the radar antenna body 6 is calculated, it is compared with the standard value of the electromagnetic wave velocity in the air to determine whether the quality of the radar antenna body 6 is qualified, and the same method can be used to perform high-precision verification of the quality of other radar antenna bodies 6.

[0071] in, ; Indicates the relative error of radar electromagnetic wave velocity measurement, If the radar antenna body 6 is within ±5%, it is considered that the radar antenna body 6 is qualified; otherwise, it is considered that the radar antenna body 6 is unqualified and needs to be repaired. Indicates the standard value of electromagnetic wave velocity in the air. =300 mm / ns.

[0072] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A high-precision verification device for engineering radar, characterized in that: include: Radar antenna body (6); A clamping mechanism (5), the clamping mechanism (5) being used to fix the radar antenna body (6); A metal-coated reflective plate (9), the metal-coated reflective plate (9) being used to reflect radar electromagnetic waves emitted by the radar antenna body (6); A distance sensor (7), wherein at least two distance sensors (7) are provided, and the distance sensors (7) are arranged side by side between the radar antenna body (6) and the metal-coated reflector (9), and the central axis of the distance sensor (7) is perpendicular to the surface of the metal-coated reflector (9); A moving mechanism (2), the moving mechanism (2) being used to drive the metal-coated reflector (9) and the distance sensor (7) to move closer to or farther away from the radar antenna body (6), so as to change the distance between the emitting surface of the radar antenna body (6) and the metal-coated reflector (9); A telescopic rod (11), the telescopic rod (11) being used to drive the distance sensor (7) to move up and down; An adjusting mechanism (3), the adjusting mechanism (3) being used to drive the clamping mechanism (5) to rotate about a vertical direction so that the distances monitored by the respective distance sensors (7) are equal, the distances monitored by the distance sensors (7) being the distances between the distance sensors (7) and the radar antenna body (6); Wherein, when the engineering radar high-precision verification device performs verification, the following steps are included: Fixing the radar antenna body (6) by means of a clamping mechanism (5); Extending the telescopic rod (11) so that the distance sensor (7) is directly opposite to the radar antenna body (6); Finely adjusting the direction of the emitting surface of the radar antenna body (6) by means of the adjustment mechanism (3) until the distances detected by the respective distance sensors (7) are equal, and recording the distances detected by the distance sensors (7) as the first distance; The telescopic rod (11) is retracted to prevent the distance sensor (7) from blocking the radar antenna body (6) from transmitting radar electromagnetic waves to the metal-coated reflector (9), and the two-way travel time of the first radar wave detected by the radar antenna body (6) is recorded; The moving mechanism (2) is triggered to move the metal-coated reflective plate (9) and the distance sensor (7) closer to or farther away from the radar antenna body (6), so as to adjust the distance between the radar antenna body (6) and the metal-coated reflective plate (9) and the distance sensor (7); the telescopic rod (11) is then extended, and the distance monitored by the distance sensor (7) after the distance adjustment is recorded as a second distance; retracting the telescopic rod (11) and recording the two-way travel time of the second radar wave detected by the radar antenna body (6) after the spacing adjustment; The radar electromagnetic wave velocity is calculated according to the first distance, the second distance, the first radar wave two-way travel time and the second radar wave two-way travel time; The first radar wave round-trip time and the second radar wave round-trip time are the time taken for the radar electromagnetic wave to travel back and forth between the radar antenna body (6) and the metal-coated reflector (9).

2. The high-precision engineering radar verification device according to claim 1 is characterized in that: The adjustment mechanism (3) comprises a second fixed column (311), the outer surface of the second fixed column (311) is interference-fitted with a bearing (310), the outer ring of the bearing (310) is mounted on the inner surface of a rotating column (309), the inner surface of the rotating column (309) is also mounted with a first internal meshing gear (308), the rotating column (309) is used to drive the clamping mechanism (5) to rotate, the first internal meshing gear (308) is meshingly connected with a fifth gear (307), the fifth gear (307) is meshingly connected with a fourth gear (306), a third gear (305) is also mounted on the gear shaft of the fourth gear (306), the third gear (305) is meshingly connected with a second gear (304); the second gear (304) is arranged at the center of the inner cavity of the rotating column (309), the second gear (304) is driven to rotate by a driving mechanism, and the diameter of the third gear (305) is greater than the diameter of the second gear (304).

3. The high-precision engineering radar verification device according to claim 2 is characterized in that: A first protrusion is provided at the upper end of the second fixed column (311), and the gear shaft of the fifth gear (307) is rotatably connected to the first protrusion. A second support plate (312) is installed on the inner wall of the second fixed column (311), and the gear shaft of the fourth gear (306) is installed on the second support plate (312).

4. The high-precision engineering radar verification device according to claim 2 is characterized in that: A first fixing column (301) is mounted at the bottom end of the second fixing column (311); a first supporting plate (302) is mounted inside the first fixing column (301); a gear shaft of the second gear (304) is rotatably connected to the first supporting plate (302); the driving mechanism comprises a first gear (303); the first gear (303) is mounted at the bottom end of the gear shaft of the second gear (304); the first gear (303) is meshedly connected to a sixth gear (313); the diameter of the sixth gear (313) is smaller than the diameter of the first gear (303); a first bevel gear (314) is mounted at the bottom end of the gear shaft of the sixth gear (313); the first bevel gear (314) is meshedly connected to a second bevel gear (316); and the inner ring of the second bevel gear (316) is interference-fitted with a rotating shaft (315).

5. The high-precision engineering radar verification device according to claim 4 is characterized in that: The top end of the first fixed column (301) is provided with a second protruding portion so that the outer surface of the upper end of the first fixed column (301) is flush with the bottom end of the rotating column (309); the top end of the first fixed column (301) is provided with a scale line on the outer surface, and the bottom end of the rotating column (309) is provided with a pointer corresponding to the scale line.

6. The high-precision engineering radar verification device according to claim 4, characterized in that: The outer surface of the first fixed column (301) is fixedly connected to a limiting sleeve (317), the inner ring of the limiting sleeve (317) is mounted with a second internal meshing gear (318), the end of the rotating shaft (315) extends into the limiting sleeve (317) and is then sleeved with a movable sleeve (320), the outer surface of the movable sleeve (320) is mounted with a seventh gear (319) adapted to the second internal meshing gear (318), the end of the rotating shaft (315) is also clamped with a snap ring (325), a spring (324) is arranged between the snap ring (325) and the movable sleeve (320), the inner surface of the movable sleeve (320) is mounted with a limiting strip (321), the outer surface of the rotating shaft (315) is provided with a limiting groove (323) matched with the limiting strip (321), and the end of the movable sleeve (320) is mounted with a driving disk (322).

7. The high-precision engineering radar verification device according to claim 1, characterized in that: The moving mechanism comprises a slider (202), the lower surface of the slider (202) being slidably matched with a slide groove on the base (1), the metal-coated reflective plate (9) and the telescopic rod (11) being mounted on the slider (202), and a first screw rod (201) being rotatably connected to the base (1), the middle portion of the first screw rod (201) passing through the slider (202) and being threadedly connected thereto.

8. The high-precision engineering radar verification device according to claim 1, characterized in that: The top end of the telescopic rod (11) is threadedly connected to a fixing seat (10), lugs (8) are symmetrically mounted on both sides of the fixing seat (10), and the distance sensor (7) is threadedly connected to the lugs (8).

9. The high-precision engineering radar verification device according to claim 1, characterized in that: The clamping mechanism (5) comprises a fixing frame (501), a second screw rod (502) being rotatably connected to the top wall of the fixing frame (501), and a clamping plate (503) being mounted on the bottom end of the second screw rod (502).

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