Millimeter wave radar production line calibration rotary table

Abstract

The utility model relates to the technical field of radar calibration equipment, in particular to a millimeter-wave radar production line calibration rotary table, which comprises a box body, a collimator arranged at the front end of the box body, a double-shaft rotary table arranged in the box body, a transverse calibration position and a longitudinal calibration position arranged on the double-shaft rotary table, a rotating shaft motor arranged on each calibration position, and a rotating shaft arranged on the rotating shaft motor. The output shafts of the two rotating shaft motors intersect in a cross shape, and the collimator is perpendicular to the intersection point of the two rotating shaft motors. According to the utility model, the double-shaft rotary table is arranged, the transverse calibration position and the longitudinal calibration position in the double-shaft rotary table are utilized to realize transverse and longitudinal calibration measurement, meanwhile, each calibration position is respectively provided with a rotating shaft motor, and through the core rod which can be fixed on the motor and synchronously rotates through the rotation of the output shaft of the motor, the calibration precision is improved. The calibration of the yaw and the rotation of the pitching angle can be realized, the measurement standard is increased, and the measurement precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to radar calibration equipment technical field, concretely relates to a millimeter wave radar production line calibration rotary table. BACKGROUND

[0002] Millimeter wave radar is a common sensor in the automatic driving industry, and plays a crucial role in vehicle automatic driving. Before the vehicle is offline, the installed sensor needs to be calibrated. The purpose of sensor calibration is to calibrate the output of the sensor, so that it can accurately measure and perceive the target physical quantity. Errors or drifts may exist in the sensor during use. Calibration can determine the error and offset of the sensor by comparing with the known accurate value, and make corresponding correction. At the same time, calibration can also improve the accuracy and reliability of the sensor, ensure the accuracy and consistency of the measurement results. In addition, calibration can also be applied to the sensor adaptability under different environmental conditions to ensure the reliability and stability of the sensor in various working scenarios. Therefore, before the millimeter wave radar assembly is offline during production line assembly, it needs to be calibrated.

[0003] However, the calibration method in the prior art is mostly to calibrate the radar directly by laser. Since the laser spot has a line diameter spot, the calibration accuracy is low. If the calibration accuracy of the calibration device is low, the accuracy of the calibrated radar will be low and the error will be large, which seriously affects the accuracy and reliability. Therefore, it is necessary to calibrate the calibration device accurately to improve the calibration accuracy.

[0004] Therefore, a millimeter wave radar production line calibration rotary table is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] Technical problems solved

[0006] In view of the above shortcomings of the prior art, the utility model provides a millimeter wave radar production line calibration rotary table, which can effectively solve the problem of poor calibration accuracy in the prior art.

[0007] Technical scheme

[0008] To achieve the above purpose, the utility model realizes by the following technical scheme:

[0009] The utility model provides a millimeter wave radar production line calibration rotary table, which comprises a box body, a collimator is arranged at the front end of the box body, and a double-shaft rotary table is arranged in the box body, a horizontal calibration position and a vertical calibration position are arranged on the double-shaft rotary table, one rotary shaft motor is arranged on each calibration position, the output shafts of the two rotary shaft motors are cross-shaped, and the collimator is perpendicular to the intersection point of the two rotary shaft motors; wherein, a cylindrical core rod is further included, and the core rod can be coaxially fixed to the front end of the output shaft in any one motor.

[0010] Further, a millimeter wave radar fixing position is arranged between the collimator and the double-axis rotary table on the box.

[0011] Further, an analog sample is detachably arranged on the millimeter wave radar fixing position, and transverse alignment holes and longitudinal alignment holes are arranged on the analog sample and coaxially arranged with output shafts of the rotary shaft motors in the transverse calibration positions and the longitudinal calibration positions.

[0012] Further, the collimator is a laser collimator.

[0013] Further, the output shaft of the rotary shaft motor is in plug-in fit with the core rod guide.

[0014] Further, a fixing sleeve is connected to the output shaft of the rotary shaft motor, a cylindrical fixing head is coaxially fixed to the middle part of the inside of the fixing sleeve, a rectangular protrusion is vertically arranged on the side of the fixing head, and an inner groove matched with the fixing head is arranged in the middle part of the core rod.

[0015] Further, a plurality of linearly arranged fixing holes are arranged in the millimeter wave radar fixing position, fixing ears are arranged on the two sides of the analog sample, and the fixing ears are fixed to the fixing holes through screws.

[0016] Further, a mirror mounting position for fixing a mirror is arranged in the middle part of the analog sample.

[0017] Further, a dark box is further included, and the box is arranged in the dark box.

[0018] Advantages

[0019] Compared with the known prior art, the technical scheme provided by the utility model has the following advantages

[0020] Advantages:

[0021] By arranging the double-axis rotary table, the transverse calibration positions and the longitudinal calibration positions in the double-axis rotary table can realize transverse and longitudinal calibration measurement, and one rotary shaft motor is arranged on each calibration position, the core rod which can be fixed on the motor and synchronously rotated through the rotation of the motor output shaft can realize the rotation of the calibration yaw and the pitch angle, the measurement standard is increased, and the measurement precision is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] Figure 1 The calibration turntable structure schematic view in the embodiment of the present application;

[0024] Figure 2 The calibration turntable structure front view schematic view in the embodiment of the present application;

[0025] Figure 3 The double-shaft turntable structure partial schematic view in the embodiment of the present application;

[0026] Figure 4 The longitudinal calibration position schematic view in the embodiment of the present application;

[0027] Figure 5 The transverse calibration position schematic view in the embodiment of the present application;

[0028] Figure 6 The mandrel and rotating shaft motor exploded structure schematic view in the embodiment of the present application;

[0029] Figure 7 The calibration turntable calibration schematic view in the embodiment of the present application.

[0030] The reference numerals in the drawings represent: 1, box body; 10, mandrel; 101, inner groove; 11, rotating shaft motor; 111, fixed sleeve; 112, fixed head; 12, millimeter wave radar fixed position; 121, analog sample; 122, transverse alignment hole; 123, longitudinal alignment hole; 124, fixed hole; 125, fixed lug; 126, mirror mounting position; 2, collimator; 3, double-shaft turntable; 31, transverse calibration position; 32, longitudinal calibration position; 4, dark box; 5, target simulator. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] The present application will be further described below in conjunction with the embodiments.

[0033] Embodiment:

[0034] The embodiment provides a millimeter wave radar production line calibration turntable. Figures 1-7 The calibration turntable mainly comprises a box body 1, and a collimator 2 is arranged at the front end of the box body 1.

[0035] The box body 1 is provided with a double-shaft turntable 3, the double-shaft turntable 3 is provided with a horizontal calibration position 31 and a vertical calibration position 32, one shaft motor 11 is arranged on each calibration position, the output shafts of the two shaft motors 11 are cross-shaped, and the collimator 2 is perpendicular to the intersection of the two shaft motors 11.

[0036] Specifically, the coaxial degree calibration of the shaft motor 11 needs to be determined first, so that the calibration turntable pitch rotation center is consistent with the millimeter wave radar center to be measured.

[0037] During calibration, the core rod 10 is inserted into the rotation center hole of the shaft motor 11, and whether the millimeter wave radar simulation sample center hole can pass through is checked.

[0038] It should be noted that the detection mode is to measure the roundness of the core rod 10 after being inserted into the equipment by using a dial gauge, so that the standard core rod cannot be tilted.

[0039] Compared with the common laser calibration of the rotation center, the cooperation between the measurement (roundness) of the core rod 10 and the simulation sample can directly confirm that the rotation center is coincident with the simulation sample center.

[0040] The laser cannot directly measure, and the laser beam has a wire diameter, which may cause calibration error and is not conducive to high-precision calibration.

[0041] Regarding the calibration of the parallelism of the radar and the simulator, the laser collimator is arranged outside the target simulator 5 and the calibration turntable.

[0042] During measurement, the laser collimator 2 is arranged at a certain distance (theoretically, the farther, the better, and the higher the calibration accuracy) outside the target simulator 5 and the turntable 3.

[0043] It should be noted that a plurality of screw holes are arranged on the turntable 3, and a mirror (not shown in the figure) is first fixed on the middle part of the turntable 3 through the screws.

[0044] First, adjust the laser collimator 2 to ensure that the laser reflected by the mirror on the turntable 3 is within a certain angle range.

[0045] Second, fix the laser collimator 2 and adjust the angle of the target simulator 5 to ensure that the laser reflected by the mirror on the turntable 3 is within a certain angle range.

[0046] Third, calibrate the coaxiality of the target simulator 5 and the turntable 3. Shoot the laser through the laser collimator 2 and adjust the horizontal position and height of the target simulator 5 to ensure that the laser spot is within a certain range of the center of the target simulator 5.

[0047] According to the above sequence, calibration is performed through the fixed laser collimator 2.

[0048] And the box 1 between the collimator 2 and the double-axis turntable 3 is also provided with a millimeter wave radar fixing position 12, a plurality of linearly arranged fixing holes 124 are formed in the millimeter wave radar fixing position 12, and a fixing ear 125 is arranged on both sides of the simulation sample 121. The fixing ear 125 is fixed with the fixing hole 124 through the screw, and the simulation sample 121 can be assembled and disassembled through the screw hole, and the simulation sample 121 is provided with a transverse alignment hole 122 and a longitudinal alignment hole 123. The transverse alignment hole 122 and the longitudinal alignment hole 123 are coaxially arranged with the output shaft of the turn shaft motor 11 on the transverse calibration position 31 and the longitudinal calibration position 32, respectively.

[0049] It should be noted that the output shaft of the turn shaft motor 11 in the embodiment is in guided plug-in cooperation with the core rod 10, the core rod 10 is hollow inside, and the output shaft of the turn shaft motor 11 is connected with a fixed sleeve 111. A cylindrical fixed head 112 is coaxially fixed in the middle of the inner side of the fixed sleeve 111, and a rectangular protrusion is vertically arranged on the side surface of the fixed head 112. An inner groove 101 matched with the fixed head 112 is formed in the middle of the core rod 10.

[0050] Therefore, when the output shaft of the turn shaft motor 11 is inserted into the core rod 10, the fixed head 112 can be clamped on the inner groove 101 to realize synchronous rotation of the core rod 10 when the output shaft of the turn shaft motor 11 rotates.

[0051] And the middle of the simulation sample 121 is provided with a mirror mounting position 126 for fixing the mirror, and the mirror mounting position 126 is composed of four screw holes. The mirror is fixed on the mirror mounting position 126 by screws (not shown in the mirror diagram).

[0052] It should be noted that the outside of the calibration device in the embodiment is also provided with a dark box 4, and the box 1 is located inside the dark box 4 to avoid external electromagnetic interference causing internal calibration accuracy to decrease.

[0053] The above examples are only used to illustrate the technical solutions of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A millimeter wave radar production line calibration turntable, characterized by, The utility model provides a kind of millimeter wave radar calibration device, including box (1), collimator (2) is provided at the front end of box (1), and double-axis turntable (3) is provided in box (1), the double-axis turntable (3) is provided with transverse calibration site (31) and longitudinal calibration site (32), each calibration site is equipped with a rotating shaft motor (11) respectively, the output shaft of two rotating shaft motors (11) is cross-shaped intersection, and collimator (2) is perpendicular to the intersection of two rotating shaft motors (11); Wherein, it further includes cylindrical core rod (10), the core rod (10) can be coaxially fixed in the output shaft front end in any motor.

2. The millimeter wave radar production line calibration turntable of claim 1, wherein, The box (1) is further provided with millimeter wave radar fixing site (12) between collimator (2) and double-axis turntable (3).

3. The millimeter wave radar production line calibration turntable of claim 2, wherein, The millimeter wave radar fixing site (12) is detachably assembled with an analog sample (121), the analog sample (121) is provided with transverse alignment hole (122) and longitudinal alignment hole (123), and the transverse alignment hole (122) and longitudinal alignment hole (123) are coaxially arranged with the output shaft of rotating shaft motor (11) on transverse calibration site (31) and longitudinal calibration site (32) respectively.

4. The millimeter wave radar production line calibration turntable of claim 3, wherein, The collimator (2) is a laser collimator.

5. The millimeter wave radar production line calibration turntable of claim 4, wherein, The output shaft of the rotating shaft motor (11) and the core rod (10) are guided and inserted.

6. The millimeter wave radar production line calibration turntable of claim 5, wherein, The output shaft of the rotating shaft motor (11) is connected with a fixed sleeve (111), a cylindrical fixed head (112) is coaxially fixed in the middle of the inner side of the fixed sleeve (111), the side surface of the fixed head (112) is vertically provided with a rectangular protrusion, and the middle part of the core rod (10) is provided with an inner groove (101) matched with the fixed head (112).

7. The millimeter wave radar production line calibration turntable of claim 6, wherein, The millimeter wave radar fixing site (12) is provided with a plurality of linearly arranged fixing holes (124), and the two sides of the analog sample (121) are respectively provided with fixing ears (125), the fixing ears (125) are fixed with the fixing holes (124) by screws.

8. The millimeter wave radar production line calibration turntable of claim 7, wherein, The middle part of the analog sample (121) is provided with a mirror mounting site (126) for fixing a mirror.

9. The millimeter wave radar production line calibration turntable of claim 7, wherein, It further includes a dark box (4), and the box (1) is located inside the dark box (4).

Images