Millimeter wave automobile radar test turntable

Abstract

The utility model relates to a millimeter wave automobile radar test rotary table which comprises a rotary table azimuth axis base, a rotary table azimuth axis is installed on the rotary table azimuth axis base, an azimuth axis cross beam is installed on the rotary table azimuth axis, a rotary table stand column is installed on the azimuth axis cross beam, an arc-shaped guide rail is installed on the rotary table stand column, and the arc-shaped guide rail is installed on the rotary table stand column. A pitch shaft is installed on the arc-shaped guide rail, a translation shaft is installed on one side of the pitch shaft, and a polarization shaft is installed on the side, away from the pitch shaft, of the translation shaft. Through a new rotary table design structure, axes of an azimuth axis, a pitch axis, a translation axis and a polarization axis of the rotary table intersect at one point in space, the point coincides with a phase center of a phased array or a radar, the phased array or the radar is tested on the rotary table, the phase center is not changed, and data of a test structure is more accurate; through the design of the arc-shaped guide rail structure, double targets can be supported, and the effective stroke coverage is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of millimeter-wave automobile radar testing, and in particular to a millimeter-wave radar testing turntable suitable for intelligent networked vehicles in the 76GHz-81GHz frequency band. Background Art

[0002] Because automotive radars are crucial to driver safety, millimeter-wave radars must undergo functional and performance testing to ensure stable, normal, and reliable operation. From R&D, debugging, optimization, production, installation, and calibration, standardized testing and diagnosis of millimeter-wave radar performance are essential.

[0003] In existing technologies, millimeter-wave automotive radar testing is mainly carried out in a microwave anechoic chamber in conjunction with radar simulators, radio frequency systems, turntable systems, software systems, etc. to realize functional tests such as automotive millimeter-wave radar radio frequency performance, radar functions, and target scene simulation, and to realize the testing of millimeter-wave radar's transmitter performance, echo reception performance, anti-interference capability, and target detection capability.

[0004] Due to the continuous development of automotive radar systems, in addition to traditional RF performance testing, scenario simulation must also be considered. Currently, in phased array or radar microwave testing, there is a problem where the center of the phased array or radar array changes due to problems with the turntable structure itself, resulting in inaccurate test results. Furthermore, in traditional test systems, the turntable structure is prone to large-angle occlusion and phase center alignment deviations. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a millimeter-wave automotive radar test turntable, which can effectively improve the large-angle test performance and reduce the phase center deviation.

[0006] The above-mentioned utility model object of the present invention is achieved through the following technical solutions:

[0007] A millimeter-wave automotive radar test turntable includes a turntable azimuth axis base, a turntable azimuth axis mounted on the turntable azimuth axis base, an azimuth axis crossbeam mounted on the turntable azimuth axis, a turntable column mounted on the azimuth axis crossbeam, an arc-shaped guide rail mounted on the turntable column, a pitch axis mounted on the arc-shaped guide rail, a translation axis mounted on one side of the pitch axis, and a polarization axis mounted on the side of the translation axis away from the pitch axis.

[0008] As a further technical solution of the present invention: the axis of the turntable azimuth axis, the pitch center of the pitch axis, the translation center line of the translation axis, and the axis of the polarization axis intersect at one point in space.

[0009] As a further technical solution of the present invention: the turntable azimuth axis outputs torque through the cooperation of a servo motor and an RV integrated reducer.

[0010] As a further technical solution of the present invention: the pitch axis is composed of an arc-shaped guide rail and an arc-shaped gear ring, and the power output is achieved by a servo motor acceleration and reduction gear.

[0011] As a further technical solution of the present invention: the translation axis is ensured to have translational straightness and rigidity by guide pillars and guide sleeves, and the power output is realized by a servo motor acceleration and reduction gear through a ball screw to realize translational motion.

[0012] As a further technical solution of the present invention: the polarization axis is rotated by a servo motor and a worm gear reducer.

[0013] As a further technical solution of the present invention: it includes a linear guide rail, and the test turntable is installed on the linear guide rail.

[0014] As a further technical solution of the present invention: a driving mechanism is installed on the linear guide rail, and the driving mechanism is used to drive the test turntable to run on the linear guide rail.

[0015] In summary, the present invention has at least one of the following beneficial technical effects:

[0016] 1. The utility model discloses a millimeter-wave automotive radar test turntable. Through a novel turntable design structure, the axes of the turntable's azimuth, pitch, translation, and polarization axes intersect at a single point in space. This point coincides with the phase center of a phased array or radar. When the phased array or radar is tested on the turntable, the phase center remains unchanged, and the test data is more accurate. The arc-shaped guide rail structure design can support dual targets, and the effective travel coverage is wider.

[0017] 2. This utility model primarily simulates some of the positional effects of a product during actual use. To ensure the accuracy of the product test, the test requires that the center of the product's array remain unchanged while the product performs swinging, rotating, and moving movements at different positions. The solution provides an innovative structural design to ensure that the center of the product's array remains unchanged during the test and that it can achieve swinging, rotating, and moving at different angles. The test product has a certain thickness. To accommodate different products, the array center can be aligned during product testing by adjusting the translation axis. Therefore, as a technical approach and method for automated testing of millimeter-wave automotive radars, this method has considerable research and application potential and possesses considerable application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the overall structure of the test turntable of the present utility model.

[0019] Figure 2 This is the main view of the test turntable of the present utility model.

[0020] Figure 3 It is a structural schematic diagram of the pitch axis of the present utility model.

[0021] Figure 4 It is a structural schematic diagram of the translation axis of the present utility model.

[0022] Figure 5 This is a schematic structural diagram of the polarization axis of the present invention.

[0023] Figure 6 It is a side view of the present utility model.

[0024] Figure 7 This is a schematic structural diagram of the linear guide rail of the present invention.

[0025] Figure markings: 1. Linear guide rail; 2. Turntable azimuth axis base; 3. Turntable azimuth axis; 4. Azimuth axis crossbeam; 5. Turntable column; 6. Arc guide rail; 7. Arc gear ring; 8. Pitch axis; 9. Translation axis; 10. Polarization axis; 11. Servo motor; 12. Worm gear reducer; 13. Translation base plate; 14. Screw nut; 15. Ball screw; 16. Guide column and guide sleeve; 17. Bearing seat; 18. Translation top plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of the present application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0029] Embodiment one:

[0030] Referring to Figures 1-2 The utility model discloses a millimeter wave automobile radar test rotary table, including rotary table azimuth axis base 2, install rotary table azimuth axis 3 on rotary table azimuth axis base 2, install azimuth axis crossbeam 4 on rotary table azimuth axis 3, install rotary table stand 5 on azimuth axis crossbeam, install arc guide 6 on rotary table stand 5, install pitch axis 8 on arc guide 6, one side of pitch axis 8 is installed with translation axis 9, and one side away from pitch axis of translation axis 9 is installed with polarization axis 10.

[0031] The axis of the rotary table azimuth axis 3, the pitch center of the pitch axis 8, the translation center line of the translation axis 9 and the axis of the polarization axis 10 intersect at a point in space.

[0032] The rotary table azimuth axis 3 is outputted with torque through the cooperation of a servo motor and an RV integrated speed reducer, and has the characteristics of stability and high precision. In the embodiment, the RV integrated speed reducer is prior art in the technical field, and is composed of a front stage of a planetary gear reducer and a rear stage of a cycloidal pin wheel reducer. The RV speed reducer has the characteristics of compact structure, large transmission ratio and self-locking function under certain conditions, is one of the most commonly used reducers, and has the characteristics of small vibration, low noise and low energy consumption.

[0033] Referring to Figure 3 The pitch axis 8 is composed of an arc guide and an arc gear ring 7, and the power output is realized by a servo motor and a speed reducer. In the embodiment, the pitch axis 8 is mainly composed of a servo motor, a planetary speed reducer, a driving gear, an arc gear ring, an arc guide and an arc slider. The power output is realized by the servo motor, the planetary speed reducer, the driving gear and the arc gear ring. The driving gear acts on the arc gear ring, and drives the entire pitch axis to perform a pitch movement.

[0034] Referring to Figure 4The translation axis 9 is ensured by the guide pillar guide sleeve 16 to be linear and rigid, and the power output is realized by the servo motor 11, the speed reducer, the ball screw 15 in the form of translation movement. In the embodiment, the translation axis 9 is composed of the servo motor 11, the worm gear reducer 12, the translation bottom plate 13, the screw nut 14, the ball screw 15, the guide pillar guide sleeve 16, the bearing seat 17 and the translation top plate 18. The power output is used on the screw nut 14 by the servo motor 11 through the worm gear reducer 12 and the ball screw 15, drives the screw nut 14 to move, and the screw nut 14 is fixed on the translation bottom plate 13, thereby driving the whole translation axis 9 to move.

[0035] With reference to Figure 5 The polarization axis 10 is realized by the servo motor and the worm gear reducer to rotate. In the embodiment, the polarization axis 10 is composed of the servo motor, the polarization axis shell, the polarization axis flange, the support bearing and the worm gear, the power transmission is transmitted to the worm through the shaft coupling from the servo motor, then to the turbine, and the polarization axis flange is driven to rotate.

[0036] With reference to Figure 6 The utility model also includes linear guide rail 1, millimeter wave automobile radar test rotary table is installed on linear guide rail 1.

[0037] With reference to Figure 7 The linear guide rail 1 is installed with the driving mechanism, and the driving mechanism is used to drive the test rotary table to run on the linear guide rail. The driving mechanism mainly includes a motor, a speed reducer, a gear and a rack, a guide rail sliding block mechanism and the like. The shaft is an electric shaft, and the transmission mechanism has two stages. The first stage transmission is a speed reducer, and the second stage transmission is a gear and a rack. The gear and the rack and the guide rail are selected from high-precision products to ensure the precision of the movement of the whole mechanism. The high-quality linear guide rail and the careful assembly can ensure that the whole device runs stably on the ground guide rail axis. On both sides of the ground guide rail, electrical limit switches and hard limit blocks are installed to effectively ensure the safe operation of the equipment.

[0038] The arc-shaped guide rail is provided with two columns, and a manual lifting shaft is installed at the top end of each column. The radio frequency front end is installed on the manual lifting shaft. The height of the radio frequency front end is adjusted by the manual lifting shaft, so that the center height is equal to the center of the radar. The radio frequency front end rotates along an arc-shaped track with a radius of R1.5 meters, and the movement range is ±90°. The two columns move independently on the arc-shaped guide rail. The arc-shaped guide rail is in the shape of a circular arc, the base is welded from high-quality carbon structural steel, and after welding, the base is subjected to high-temperature heat treatment and aging treatment. The base is processed by a numerical control machining center, and the machining precision is reliable.

[0039] The utility model discloses an implementation principle for: the utility model discloses a millimeter wave automobile radar test rotary table, which is designed with a new rotary table structure, so that the axes of the azimuth axis, the pitch axis, the translation axis and the polarization axis of the rotary table intersect at a point in space. This point coincides with the phase center of the phased array or radar. The phased array or radar is tested on the rotary table, and the phase center remains unchanged. The data of the test structure is more accurate. The arc-shaped guide rail structure design can support double targets and cover a wider effective stroke.

[0040] The embodiments of the present specific embodiment are preferred embodiments of the utility model, and do not limit the protection scope of the utility model. Therefore, equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.

Claims

1. A millimeter wave automotive radar test turntable, characterized in that: The invention comprises a turntable azimuth axis base (2), a turntable azimuth axis (3) is mounted on the turntable azimuth axis base (2), an azimuth axis crossbeam (4) is mounted on the turntable azimuth axis (3), a turntable column (5) is mounted on the azimuth axis crossbeam (4), an arc guide rail (6) is mounted on the turntable column (5), a pitch axis (8) is mounted on the arc guide rail (6), a translation axis (9) is mounted on one side of the pitch axis (8), and a polarization axis (10) is mounted on the side of the translation axis (9) away from the pitch axis (8).

2. The millimeter wave automotive radar test turntable according to claim 1, characterized in that: The axis of the turntable azimuth axis (3), the pitch center of the pitch axis (8), the translation center line of the translation axis (9), and the axis of the polarization axis (10) intersect at one point in space.

3. The millimeter wave automotive radar test turntable according to claim 1, characterized in that: The turntable azimuth shaft (3) outputs torque through the cooperation of a servo motor and an RV integrated reducer.

4. The millimeter wave automotive radar test turntable according to claim 1, characterized in that: The pitch axis (8) is composed of an arc-shaped guide rail (6) and an arc-shaped gear ring (7), and the power output is achieved by a servo motor acceleration and reduction gear.

5. The millimeter wave automotive radar test turntable according to claim 1, characterized in that: The translation axis (9) is ensured of translational straightness and rigidity by guide posts and guide sleeves, and the power output is realized by a servo motor acceleration and reduction gear in the form of a ball screw to achieve translational motion.

6. The millimeter wave automotive radar test turntable according to claim 1, characterized in that: The polarization shaft (10) is rotated by a servo motor and a worm gear reducer.

7. A millimeter wave automotive radar test turntable according to any one of claims 1 to 6, characterized in that: It comprises a linear guide rail (1), and the test turntable is mounted on the linear guide rail (1).

8. The millimeter wave automotive radar test turntable according to claim 7, characterized in that: A driving mechanism is installed on the linear guide rail (1), and the driving mechanism is used to drive the test turntable to run on the linear guide rail (1).

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