CN210572506U - Vehicle-mounted radar antenna whole machine plane near field test system - Google Patents
Vehicle-mounted radar antenna whole machine plane near field test system Download PDFInfo
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- CN210572506U CN210572506U CN201921104331.4U CN201921104331U CN210572506U CN 210572506 U CN210572506 U CN 210572506U CN 201921104331 U CN201921104331 U CN 201921104331U CN 210572506 U CN210572506 U CN 210572506U
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Abstract
The utility model discloses a complete quick-witted plane near field test system of vehicle radar antenna belongs to vehicle radar technical field, including bearing revolving stage (1), two-dimensional plane mechanical scanning frame (3), RF subsystem and main control computer (13) that are used for adjusting vehicle radar antenna (2) test position, solved and to have carried out the test of vehicle radar antenna, real test goes out the technical problem of vehicle antenna complete machine radiation performance, the utility model discloses the vehicle active radar antenna complete machine test to no reference interface provides a simple swift solution simultaneously, can be accurate, test vehicle radar antenna's complete machine radiation performance comprehensively. The main control computer performs plane scanning collection on the amplitude-phase data through the control probe, and provides accurate data basis for improvement of the vehicle-mounted radar antenna through software analysis and data analysis result output, and meanwhile, the factory test efficiency of the whole automobile radar is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of the vehicle radar, especially, relate to a complete quick-witted plane near field test system of vehicle radar antenna.
Background
The automobile millimeter wave radar is widely applied to the fields of an active cruise system, automatic emergency braking, forward collision early warning and the like, and the requirements on automobile radar antenna tests, particularly vehicle-mounted radar antenna complete machine tests are more and more. However, the defects of the current domestic automobile antenna test environment, particularly the complete automobile vehicle-mounted millimeter wave radar antenna test, limit the development of the related fields of the automobile industry to a certain extent.
Antenna measurement systems are currently typically deployed in microwave darkrooms, mainly including far-field, compact-field, and near-field measurement systems. If the darkroom conditions satisfy the far-field measurement conditions, a conventional far-field measurement may be selected. Compact fields may be selected if the measured distance is not far enough for far field conditions. However, when the vehicle-mounted radar antenna is used for complete vehicle test, the vehicle used as a carrier is usually large in size and heavy in weight. In general compact range and far field tests, the test dead zone is relatively limited, the whole machine test needs to be erected to the central axis height of a darkroom, the use for measuring the three-dimensional radiation characteristic of a space is inconvenient, and the whole manufacturing cost is very high.
Besides far-field and compact field measurement, the planar near-field measurement technology is an ideal measurement means for high-gain antenna test, and is suitable for high-gain and narrow-beam antenna types such as automobile radar antennas. The test erection of the whole automobile antenna under the plane near-field test is very convenient, only the radar antennas arranged at different positions of the automobile are required to be adjusted to align with the test probe, the probe collects the data of the antenna radiation field in the antenna radiation near-field region, and the far-field characteristic of the whole automobile radar antenna is obtained through the computer processing by the near-field-far-field transformation theory.
In the traditional near-field test of the active antenna, an emission source or a vector network analyzer is adopted, a reference signal is coupled to a measuring instrument from the emission source or a power amplifier end respectively, and the reference signal is compared with the phase of the measuring antenna to obtain sampled phase information. For some novel integrated vehicle-mounted active radar antennas, a reference interface for the equipment is not reserved, and the phase of the active antenna cannot be tested by adopting the reference source mode.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a complete quick-witted plane near field test system of vehicle radar antenna has solved and can carry out the test of vehicle radar antenna, and real test goes out the technical problem of vehicle antenna complete machine radiation performance.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a vehicle-mounted radar antenna whole machine plane near-field test system comprises a bearing rotary table, a two-dimensional plane mechanical scanning frame, an RF subsystem and a main control computer, wherein the bearing rotary table is used for adjusting the test position of a vehicle-mounted radar antenna;
the RF subsystem comprises a vector network analyzer, a flexible cable, a reference probe and a scanning probe, wherein the scanning probe is connected with the vector network analyzer through the flexible cable, and the vector network analyzer is communicated with the main control computer through a data line; the vector network analyzer is connected with the reference probe or the vehicle-mounted radar antenna through a flexible cable;
the vehicle to be tested is parked on the bearing rotary table, and the bearing rotary table drives the vehicle to be tested to rotate, so that the vehicle-mounted radar antenna on the vehicle to be tested faces to the front of the scanning probe;
the scanning probe is used for regularly acquiring amplitude and phase data of the vehicle-mounted radar antenna point by point at a determined position of a near field region measuring surface in front of the vehicle-mounted radar antenna;
the scanning probe is fixedly arranged on the two-dimensional plane mechanical scanning frame;
and the reference probe is used for providing reference phase information of the vehicle-mounted radar antenna for the vector network analyzer.
Preferably, the scanning probe is connected to the vector network analyzer through a low noise amplifier.
Preferably, the vector network analyzer is connected with the vehicle-mounted radar antenna through a power amplifier.
Preferably, the reference probe is connected to the vector network analyzer through a low noise amplifier.
Preferably, the scanning probe is connected with an intermediate frequency local oscillator unit through a millimeter wave receiving unit, the intermediate frequency local oscillator unit is connected with the vector network analyzer, the intermediate frequency local oscillator unit drives a millimeter wave transmitting unit through a power amplifier, and the millimeter wave receiving unit drives the vehicle-mounted radar antenna.
Preferably, the scanning probe is connected with an intermediate frequency local oscillation unit through a millimeter wave receiving unit, the intermediate frequency local oscillation unit is connected with the vector network analyzer, and the reference probe is connected with the intermediate frequency local oscillation unit through a millimeter wave receiving unit.
Preferably, the diameter of the bearing rotary table is 8m, and the positioning precision is 0.1 degree; the effective scanning stroke of the two-dimensional plane mechanical scanning frame is as follows: the transverse stroke is 3m, the longitudinal stroke is 2.5m, and the planeness is less than 0.04 mm.
Preferably, the reference probe is a standard gain horn antenna with a gain of 25dB and a waveguide interface of BJ900, and the reference probe faces the center of the vehicle-mounted radar antenna.
A complete quick-witted plane near field test system of vehicle radar antenna, solved and to have carried out the test of vehicle radar antenna, real test goes out the technical problem of vehicle antenna complete machine radiation performance, the utility model discloses the vehicle-mounted active radar antenna complete machine test to no reference interface provides a simple swift solution simultaneously, can test vehicle radar antenna's complete machine radiation performance accurately, comprehensively. The main control computer performs plane scanning collection on the amplitude-phase data through the control probe, and provides accurate data basis for improvement of the vehicle-mounted radar antenna through software analysis and data analysis result output, and meanwhile, the factory test efficiency of the whole automobile radar is greatly improved.
Drawings
Fig. 1 is a system schematic diagram of embodiment 1 of the present invention;
fig. 2 is a system schematic diagram of embodiment 2 of the present invention;
fig. 3 is a system schematic diagram of embodiment 3 of the present invention;
fig. 4 is a system schematic diagram of embodiment 4 of the present invention;
in the figure: the device comprises a bearing rotary table 1, a vehicle-mounted radar antenna 2, a two-dimensional plane mechanical scanning frame 3, a scanning probe 4, a power amplifier 5, a low noise amplifier 6, a flexible cable assembly 7, a vector network analyzer 8, a reference probe 9, a millimeter wave transmitting unit 10, a millimeter wave receiving unit 11, an intermediate frequency local oscillator unit 12 and a main control computer 13.
Detailed Description
Example 1:
the complete plane near-field test system for the vehicle-mounted radar antenna shown in fig. 1 comprises a bearing rotary table 1 for adjusting the test position of a vehicle-mounted radar antenna 2, a two-dimensional plane mechanical scanning frame 3, an RF subsystem and a main control computer 13;
the whole plane near-field test system of the vehicle-mounted radar antenna is positioned in a microwave darkroom, a main control computer 13 controls a probe to perform two-dimensional plane scanning on a two-dimensional plane mechanical scanning frame 3, the amplitude and phase data of the radar antenna are collected point by point, and the collected data are uploaded to the main control computer 13 through an RF subsystem for analysis and processing.
The RF subsystem comprises a vector network analyzer 8, a flexible cable 7, a reference probe 9 and a scanning probe 4, the scanning probe 4 is connected with the vector network analyzer 8 through the flexible cable 7, and the vector network analyzer 8 is communicated with a main control computer 13 through a data line; the vector network analyzer 8 is connected with the reference probe 9 or the vehicle-mounted radar antenna 2 through the flexible cable 7;
the RF subsystems are configured for the typical operating bands 24GHz and 77GHz, respectively, of the automotive on-board radar antenna 2.
The vehicle to be tested is parked on the bearing rotary table 1, the bearing rotary table 1 drives the vehicle to be tested to rotate, and the vehicle-mounted radar antenna 2 on the vehicle to be tested faces to the front of the scanning probe 4;
the scanning probe 4 is used for regularly acquiring amplitude and phase data of the vehicle-mounted radar antenna 2 point by point at a determined position of a near field region measuring surface in front of the vehicle-mounted radar antenna 2;
the scanning probe 4 is fixedly arranged on the two-dimensional plane mechanical scanning frame 3;
the reference probe 9 is used to provide the vector network analyzer 8 with reference phase information of the vehicle radar antenna 2.
Preferably, the scanning probe 4 is connected to the vector network analyzer 8 through a low noise amplifier 6.
Preferably, the vector network analyzer 8 is connected to the vehicle radar antenna 2 via a power amplifier 5.
Preferably, the diameter of the bearing rotary table 1 is 8m, the positioning precision is 0.1 degree, and the load is more than 10T; the effective scanning stroke of the two-dimensional plane mechanical scanning frame 3 is as follows: the transverse stroke is 3m, the longitudinal stroke is 2.5m, the repeated positioning precision is less than or equal to 0.03mm, and the planeness is less than 0.04 mm.
The embodiment 1 is suitable for testing a 24GHz vehicle-mounted radar antenna 2, a main control computer 13 controls a certain position of a 24GHz scanning probe 4 on a near field measurement surface in front of the vehicle-mounted radar antenna 2 to regularly acquire amplitude and phase data of the whole vehicle-mounted radar antenna 2 point by point, the scanning probe 4 records field values at the positions, the acquired data are transmitted to a vector network analyzer 8 through a flexible cable 7, and the main control computer 13 processes the data acquired by the vector network analyzer 8 to obtain the amplitude and phase information.
Example 2:
Preferably, the reference probe 9 is a standard gain horn antenna with a gain of 25dB and a waveguide interface of BJ900, and the reference probe 9 faces the center of the vehicle-mounted radar antenna 2.
The reference probe 9 provides reference phase information for the complete machine test of the vehicle-mounted active radar antenna without a reference interface: for the vehicle-mounted radar antenna 2 without the reference interface, the phase information received by the reference probe 9 is stable because the radar antenna to be detected is fixed, and a gain is erected at a proper position in front of the vehicle-mounted radar antenna 2 towards the center of a detected piece: 25dB, waveguide interface: the standard gain horn antenna of the BJ220 faces to the center of the antenna to be measured and is transmitted to the vector network analyzer 8 through the flexible cable 7 to provide reference phase information.
Example 3:
For the vehicle-mounted radar antenna 2 with the reference interface, the emission source is directly connected to the reference interface through the waveguide of the millimeter wave emission unit 10 by adopting an internal source of the vector network analyzer 8, and is coupled with the vector network analyzer 8 to provide phase information of the reference branch.
The millimeter wave transmitting unit 10 is used for realizing frequency conversion transmission of a transmitting link and solving the problem of transmission loss of a millimeter wave band coaxial cable, and comprises a frequency multiplier, a waveguide mixer and a waveguide coupler.
The millimeter wave receiving unit 11 is used for realizing frequency conversion transmission of a receiving link and solving the problem of transmission loss of a millimeter wave band coaxial cable, and comprises a mixer and a duplexer.
In embodiment 3, the millimeter wave receiving unit 11 is added at the rear side of the scanning probe 4, and down-conversion processing is performed on 77GHz millimeter wave signals received by the scanning probe 4 in advance, so that the millimeter wave signals are converted into intermediate frequency signals below 18GHz, and then the intermediate frequency signals are transmitted to the vector network analyzer 8 by using the flexible coaxial cable, and the main control computer 13 processes the low-frequency signals received by the vector network analyzer 8 to obtain the amplitude and phase information of the near-field probe, and then the far-field radiation characteristic of the whole vehicle-mounted radar antenna 2 is obtained through near-far field conversion.
Example 4:
embodiment 4 shown in fig. 4 differs from embodiment 1 in that:
the scanning probe 4 is connected with an intermediate frequency local oscillation unit 12 through a millimeter wave receiving unit 11, the intermediate frequency local oscillation unit 12 is connected with the vector network analyzer 8, and the reference probe 9 is connected with the intermediate frequency local oscillation unit 12 through a millimeter wave receiving unit 11.
For the vehicle-mounted radar antenna 2 without the reference interface, the received reference phase information is stable because the radar antenna to be detected is fixed, and a gain is erected at a proper position in front of the vehicle-mounted radar antenna 2 of the automobile towards the center of a detected piece: 25dB, waveguide interface: the standard gain horn antenna of the BJ900, the waveguide is directly connected with the millimeter wave receiving unit 11 and is transmitted to the vector network analyzer 8 through the flexible cable 7 to provide reference phase information.
The model of the two-dimensional planar mechanical scanning frame is LP-3/2.5m, the model of the scanning probe is standard open waveguide BJ220/BJ900, the model of the power amplifier is CMC-0.3G26.5G, the model of the low noise amplifier is CLN-0.1G30G, the model of the vector network analyzer is N5222A, the model of the millimeter wave transmitting unit is a Keysight-TX integrated unit, the model of the millimeter wave receiving unit is a Keysight-RX integrated unit, and the model of the intermediate frequency local oscillator unit is Keysight-85309B.
A complete quick-witted plane near field test system of vehicle radar antenna, solved and to have carried out the test of vehicle radar antenna 2, real test goes out the technical problem of vehicle antenna complete machine radiation performance, the utility model discloses the vehicle-mounted active radar antenna complete machine test to no reference interface provides a simple swift solution simultaneously, can test vehicle radar antenna 2's complete machine radiation performance accurately, comprehensively. The main control computer 13 performs plane scanning on the acquired amplitude-phase data through the control probe, and provides accurate data basis for improvement of the vehicle-mounted radar antenna 2 through software analysis and data analysis result output, and meanwhile, the factory test efficiency of the whole automobile radar is greatly improved.
Claims (8)
1. The utility model provides a complete quick-witted plane near field test system of on-vehicle radar antenna which characterized in that: the device comprises a bearing rotary table (1) for adjusting the test position of a vehicle-mounted radar antenna (2), a two-dimensional plane mechanical scanning frame (3), an RF subsystem and a main control computer (13);
the RF subsystem comprises a vector network analyzer (8), a flexible cable (7), a reference probe (9) and a scanning probe (4), the scanning probe (4) is connected with the vector network analyzer (8) through the flexible cable (7), and the vector network analyzer (8) is communicated with a main control computer (13) through a data line; the vector network analyzer (8) is connected with the reference probe (9) or the vehicle-mounted radar antenna (2) through the flexible cable (7);
the vehicle to be tested is parked on the bearing rotary table (1), the bearing rotary table (1) drives the vehicle to be tested to rotate, and the vehicle-mounted radar antenna (2) on the vehicle to be tested faces to the front of the scanning probe (4);
the scanning probe (4) is used for regularly acquiring amplitude and phase data of the vehicle-mounted radar antenna (2) point by point at a determined position of a near field region measuring surface in front of the vehicle-mounted radar antenna (2);
the scanning probe (4) is fixedly arranged on the two-dimensional plane mechanical scanning frame (3);
the reference probe (9) is used for providing reference phase information of the vehicle-mounted radar antenna (2) for the vector network analyzer (8).
2. The vehicle-mounted radar antenna complete machine plane near field test system of claim 1, characterized in that: the scanning probe (4) is connected with the vector network analyzer (8) through a low noise amplifier (6).
3. The vehicle-mounted radar antenna complete machine plane near field test system of claim 2, characterized in that: the vector network analyzer (8) is connected with the vehicle-mounted radar antenna (2) through a power amplifier (5).
4. The vehicle-mounted radar antenna complete machine plane near field test system of claim 2, characterized in that: the reference probe (9) is connected with the vector network analyzer (8) through a low noise amplifier (6).
5. The vehicle-mounted radar antenna complete machine plane near field test system of claim 1, characterized in that: scanning probe (4) are connected one intermediate frequency local oscillator unit (12) through one millimeter wave receiving element (11), and intermediate frequency local oscillator unit (12) are connected vector network analyzer (8), and intermediate frequency local oscillator unit (12) drive one millimeter wave transmitting element (10) through one power amplifier (5), and millimeter wave receiving element (11) drive on-vehicle radar antenna (2).
6. The vehicle-mounted radar antenna complete machine plane near field test system of claim 1, characterized in that: the scanning probe (4) is connected with an intermediate frequency local oscillator unit (12) through a millimeter wave receiving unit (11), the intermediate frequency local oscillator unit (12) is connected with the vector network analyzer (8), and the reference probe (9) is connected with the intermediate frequency local oscillator unit (12) through a millimeter wave receiving unit (11).
7. The vehicle-mounted radar antenna complete machine plane near field test system of claim 2, characterized in that: the diameter of the bearing rotary table (1) is 8m, and the positioning precision is 0.1 degree; the effective scanning stroke of the two-dimensional plane mechanical scanning frame (3) is as follows: the transverse stroke is 3m, the longitudinal stroke is 2.5m, and the planeness is less than 0.04 mm.
8. The vehicle-mounted radar antenna complete machine plane near field test system of claim 2, characterized in that: the reference probe (9) is a standard gain horn antenna with 25dB of gain and a BJ900 waveguide interface, and the reference probe (9) faces to the center of the vehicle-mounted radar antenna (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921104331.4U CN210572506U (en) | 2019-07-15 | 2019-07-15 | Vehicle-mounted radar antenna whole machine plane near field test system |
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| CN201921104331.4U CN210572506U (en) | 2019-07-15 | 2019-07-15 | Vehicle-mounted radar antenna whole machine plane near field test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812418A (en) * | 2020-07-17 | 2020-10-23 | 中国汽车工程研究院股份有限公司 | Tire pressure monitoring antenna performance testing system and method |
| CN112014651A (en) * | 2020-09-03 | 2020-12-01 | 上海无线电设备研究所 | Testing method and testing system of frequency conversion multi-channel phased array antenna |
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2019
- 2019-07-15 CN CN201921104331.4U patent/CN210572506U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812418A (en) * | 2020-07-17 | 2020-10-23 | 中国汽车工程研究院股份有限公司 | Tire pressure monitoring antenna performance testing system and method |
| CN111812418B (en) * | 2020-07-17 | 2021-09-28 | 中国汽车工程研究院股份有限公司 | Tire pressure monitoring antenna performance testing system and method |
| CN112014651A (en) * | 2020-09-03 | 2020-12-01 | 上海无线电设备研究所 | Testing method and testing system of frequency conversion multi-channel phased array antenna |
| CN112014651B (en) * | 2020-09-03 | 2023-05-16 | 上海无线电设备研究所 | Test method and test system of variable-frequency multi-channel phased array antenna |
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