阅读说明：本技术 雷达产线测试系统及方法 (Radar production line testing system and method ) 是由 齐照山 林东峰 何育林 郭梦阳 陈明 于 2019-11-21 设计创作，主要内容包括：本发明提供了一种雷达产线测试系统及方法,其中,系统中包括：测试暗箱；设置于测试暗箱内部一侧的待测试雷达；与待测试雷达相对设置于测试暗箱内部另一侧的测试天线,用于收发待测试雷达发送的测试信号；与测试天线连接的定向耦合器,用于根据测试天线接收的测试信号生成RX信号和TX信号；与定向耦合器连接的RX延迟线,用于将定向耦合器生成的RX信号作为返回信号源并经测试天线反射回去；经TX信号线与定向耦合器连接、设置于测试暗箱外部的频谱设备,用于对TX信号进行频谱分析；及用于控制雷达产线测试系统工作及解析测试数据的工控机,分别与待测试雷达和频谱设备连接。其能够实现雷达的近场测试,设计成本低,测试效率高,且能满足雷达产线的测试要求。(The invention provides a system and a method for testing a radar production line, wherein the system comprises: testing a dark box; the radar to be tested is arranged on one side inside the testing camera bellows; the test antenna is arranged on the other side in the test camera bellows opposite to the radar to be tested and is used for receiving and transmitting a test signal sent by the radar to be tested; a directional coupler connected to the test antenna for generating an RX signal and a TX signal from a test signal received by the test antenna; the RX delay line is connected with the directional coupler and is used for taking the RX signal generated by the directional coupler as a return signal source and reflecting the RX signal back through the test antenna; the frequency spectrum equipment is connected with the directional coupler through a TX signal line and arranged outside the testing dark box and used for carrying out frequency spectrum analysis on the TX signal; and the industrial personal computer is used for controlling the work of the radar production line test system and analyzing the test data and is respectively connected with the radar to be tested and the frequency spectrum equipment. The near field test of radar can be realized to it, and design cost is low, and efficiency of software testing is high, and can satisfy the test requirement of radar production line.)

1. A radar production line testing system, comprising:

testing a dark box;

the radar to be tested is arranged on one side inside the testing camera bellows;

the test antenna is arranged on the other side of the interior of the test camera bellows opposite to the radar to be tested, is arranged at the same height as the radar to be tested and is used for receiving and transmitting a test signal sent by the radar to be tested;

the directional coupler is connected with the test antenna and is used for generating an RX signal and a TX signal according to the test signal received by the test antenna;

the RX delay line is connected with the directional coupler and is used for taking the RX signal generated by the directional coupler as a return signal source and reflecting the RX signal back through the test antenna;

the frequency spectrum equipment is connected with the directional coupler through a TX signal line and arranged outside the testing dark box and is used for carrying out frequency spectrum analysis on the TX signal; and

and the industrial personal computer is used for controlling the work of the radar production line test system and analyzing test data and is respectively connected with the radar to be tested and the frequency spectrum equipment.

2. The radar line production test system of claim 1, wherein the RX delay line includes a shorting strip therein for shorting the RX signals generated by the directional coupler back through the test antenna.

3. The radar production line testing system of claim 1 or 2, wherein the spectrum device comprises a lower frequency plate and a spectrum analyzer;

the frequency reduction plate is connected with the directional coupler through a TX signal line and used for reducing the frequency of a TX signal generated by the directional coupler to obtain a frequency reduction signal source;

the frequency spectrograph is connected with the frequency reduction plate and used for carrying out frequency spectrum analysis on the frequency reduction signal source.

4. The radar production line testing system of claim 1, further comprising an upper computer connected to the radar to be tested and the spectrometer respectively;

the radar to be tested receives the return signal source, analyzes the return signal source and then feeds the return signal source back to the upper computer for recording; and the frequency spectrum equipment feeds back the TX signal to the upper computer for recording after carrying out frequency spectrum analysis on the TX signal.

5. The radar production line testing system according to claim 1, 2 or 4, further comprising a radar testing device for fixing a band test radar, wherein the radar testing device comprises:

a support base;

the first horizontal sliding rail is arranged on the surface of the supporting base;

the supporting piece is used for supporting the radar to be tested at a preset height and driving the radar to be tested to horizontally move in the first horizontal sliding rail along a first axial direction, and the supporting piece is connected above the first horizontal sliding rail in a sliding mode;

the vertical direction rotary table is used for driving the radar to be tested to rotate along the vertical direction and is rotatably connected to the upper end part of the supporting part;

the fixture is used for clamping the radar to be tested and is fixedly connected with the vertical azimuth turntable; and

and the driving device is used for controlling the support piece and the vertical direction rotary table to act, and is respectively and electrically connected with the industrial personal computer, the first horizontal sliding rail and the vertical direction rotary table.

6. The radar production line testing system of claim 5,

the radar testing device further comprises a second horizontal sliding rail, the first horizontal sliding rail is arranged above the second horizontal sliding rail in a sliding mode, the supporting piece is connected above the first horizontal sliding rail in a sliding mode, the first axial direction and the second axial direction are perpendicular to each other, and the first horizontal sliding rail is connected with the driving device;

and/or the support piece comprises a vertical sliding rail, the vertical sliding rail is arranged at the upper end part of the support piece, and the vertical direction rotary table is positioned on one side of the vertical sliding rail and is in sliding connection with the support piece;

and/or, radar testing arrangement is still including driving the horizontal position revolving stage that awaits measuring radar rotated along the horizontal direction, horizontal position revolving stage rotate set up in support the base surface, first horizontal slide rail set up in horizontal position revolving stage surface, just horizontal position revolving stage with drive arrangement electricity is connected.

7. A radar production line testing method applied to the radar production line testing system according to any one of claims 1 to 6, wherein the radar production line testing method comprises the following steps:

a radar to be tested transmits a test signal;

receiving the test signal by a test antenna;

the directional coupler generates an RX signal and a TX signal according to the test signal;

the frequency spectrum device receives the TX signal through a TX signal line and carries out frequency spectrum analysis on the TX signal;

the RX signal is used as a return signal source by an RX delay line and is reflected back by a test antenna;

and the radar to be tested receives the returned signal source and analyzes the returned signal source.

8. The radar production line testing method of claim 7, wherein the receiving and spectral analysis of the TX signal by the spectrum device via the TX signal line comprises:

the frequency reduction plate reduces the frequency of the TX signal to obtain a frequency reduction signal source;

and the frequency spectrograph carries out spectrum analysis on the frequency reduction signal source.

9. The method for testing the radar production line according to claim 7 or 8, wherein the step of transmitting the test signal by the radar to be tested further comprises:

the radar testing device rotates the pitch angle of the radar to be tested;

and the radar testing device automatically adjusts the relative position relation between the radar to be tested and the testing antenna according to the rotating pitch angle of the radar to be tested.

10. The radar production line testing method according to claim 7 or 8,

the frequency spectrum equipment receives the TX signal through a TX signal line and performs frequency spectrum analysis on the TX signal, and the frequency spectrum equipment also comprises a step of feeding back an upper computer for recording; and/or the presence of a gas in the gas,

and after the radar to be tested receives and analyzes the returned signal source, the method also comprises the step of feeding back the upper computer for recording.

Technical Field

The invention relates to the technical field of machinery, in particular to a radar production line testing system and method.

Background

Radar, a transliteration of radio in english, is derived from the acronym radio detection and ranging, meaning "radio detection and ranging", i.e. finding objects and determining their spatial position by radio. Therefore, radar is also referred to as "radiolocation". Radars are electronic devices that detect objects using electromagnetic waves. The radar emits electromagnetic waves to irradiate the target and receives the echo of the target, so that information such as the distance from the target to an electromagnetic wave emission point, the direction and the like is obtained. The specific use and structure of various radars varies, but the basic form is consistent, including: a transmitter, a transmitting antenna, a receiver, a receiving antenna, a processing section and a display. And auxiliary equipment such as power supply equipment, data recording equipment, anti-interference equipment and the like. With scientific progress in various fields such as microelectronics, the development of radar technology and the expansion of application fields are continuous.

The performance of the radar needs to be tested before the radar leaves a factory, and in the testing process, the radar is placed at one end of a darkroom testing system, and the antenna is placed at the other end of the darkroom testing system, so that the performance of the radar is tested. In the automobile radar test, the performance test and the radar function test of a radar transmitter are the key points of the test. However, the existing test system mostly divides the performance test of the transmitter of the radar and the function test of the radar into two independent systems for testing, and has long test time, redundant test equipment and high test cost.

Disclosure of Invention

The invention aims to provide a radar production line testing system and a method, which effectively solve the technical problems of long testing time, redundant testing equipment, high testing cost and the like of the conventional radar production line testing system.

The technical scheme provided by the invention is as follows:

a radar production line testing system comprising:

testing a dark box;

the radar to be tested is arranged on one side inside the testing camera bellows;

the test antenna is arranged on the other side of the interior of the test camera bellows opposite to the radar to be tested, is arranged at the same height as the radar to be tested and is used for receiving and transmitting a test signal sent by the radar to be tested;

the directional coupler is connected with the test antenna and is used for generating an RX signal and a TX signal according to the test signal received by the test antenna;

the RX delay line is connected with the directional coupler and is used for taking the RX signal generated by the directional coupler as a return signal source and reflecting the RX signal back through the test antenna;

the frequency spectrum equipment is connected with the directional coupler through a TX signal line and arranged outside the testing dark box and is used for carrying out frequency spectrum analysis on the TX signal; and

and the industrial personal computer is used for controlling the work of the radar production line test system and analyzing test data and is respectively connected with the radar to be tested and the frequency spectrum equipment.

In the technical scheme, the directional coupler is arranged in the radar production line testing system, the received testing signals are divided into RX signals and TX signals, the RX signals are reflected back through an RX delay line, the TX signals are subjected to spectrum analysis through spectrum equipment, radar (24G/77G) near field testing/static simulation testing can be achieved, operation and maintenance are convenient, the design cost is low, the testing efficiency is high, only one testing antenna is configured, the TX (transmitting signal) testing mode and the RX (self-generating and self-receiving) testing mode of radar testing can be met simultaneously, the testing requirements of a radar production line are met, and the radar production line testing system does not need to be tested through two systems.

It is further preferred that a shorting strip is included in the RX delay line for shorting out the RX signal generated by the directional coupler and returning it via the test antenna.

Further preferably, the spectrum device comprises a frequency demultiplier and a spectrum analyzer;

the frequency reduction plate is connected with the directional coupler through a TX signal line and used for reducing the frequency of a TX signal generated by the directional coupler to obtain a frequency reduction signal source;

the frequency spectrograph is connected with the frequency reduction plate and used for carrying out frequency spectrum analysis on the frequency reduction signal source.

In the technical scheme, the received TX signal is subjected to frequency reduction through the frequency reduction plate, and then the frequency spectrum analysis is directly performed through the frequency spectrograph, so that the method is simple and convenient.

Further preferably, the radar production line testing system further comprises an upper computer respectively connected with the radar to be tested and the spectrometer;

the radar to be tested receives the return signal source, analyzes the return signal source and then feeds the return signal source back to the upper computer for recording; and the frequency spectrum equipment feeds back the TX signal to the upper computer for recording after carrying out frequency spectrum analysis on the TX signal.

Further preferably, the radar production line testing system further includes a radar testing device for fixing the band testing radar, and the radar testing device includes:

a support base;

the first horizontal sliding rail is arranged on the surface of the supporting base;

the supporting piece is used for supporting the radar to be tested at a preset height and driving the radar to be tested to horizontally move in the first horizontal sliding rail along a first axial direction, and the supporting piece is connected above the first horizontal sliding rail in a sliding mode;

the vertical direction rotary table is used for driving the radar to be tested to rotate along the vertical direction and is rotatably connected to the upper end part of the supporting part;

the fixture is used for clamping the radar to be tested and is fixedly connected with the vertical azimuth turntable; and

and the driving device is used for controlling the support piece and the vertical direction rotary table to act, and is respectively and electrically connected with the industrial personal computer, the first horizontal sliding rail and the vertical direction rotary table.

In this technical scheme, set up support piece, first horizontal slide rail and vertical direction revolving stage among the radar testing arrangement to dispose drive arrangement, with this, when testing the radar, obtain the radar and test the antenna position relation (including with the relative position of test antenna, with the contained angle isoparametric between the test antenna) the revised value and then control support piece and vertical direction revolving stage action between the antenna according to the position, guarantee that the contained angle can not appear between radar and the test antenna, improve measuring accuracy.

Further preferably, the radar testing device further comprises a second horizontal slide rail, the first horizontal slide rail is slidably disposed above the second horizontal slide rail, the supporting member is slidably connected above the first horizontal slide rail, the first axial direction and the second axial direction are perpendicular to each other, and the supporting member is connected with the driving device;

and/or the support piece comprises a vertical sliding rail, the vertical sliding rail is arranged at the upper end part of the support piece, and the vertical direction rotary table is positioned on one side of the vertical sliding rail and is in sliding connection with the support piece;

and/or, radar testing arrangement is still including driving the horizontal position revolving stage that awaits measuring radar rotated along the horizontal direction, horizontal position revolving stage rotate set up in support the base surface, first horizontal slide rail set up in horizontal position revolving stage surface, just horizontal position revolving stage with drive arrangement electricity is connected.

In this technical scheme, set up the second horizontal slide rail simultaneously outside first horizontal slide rail and the vertical direction revolving stage of setting up in the radar testing arrangement, carry out accurate control to the position of the radar that awaits measuring, further improve the accuracy of line test system is produced to the radar. In addition, the supporting piece is provided with a vertical sliding rail so as to accurately control the upper position and the lower position of the radar to be tested, and the accuracy of a radar production line testing system is further improved. And moreover, a horizontal azimuth turntable is arranged in the radar testing device, the horizontal azimuth of the radar to be tested is further controlled, the application of the radar testing device is expanded, the pitch angle performance of the radar can be tested in an auxiliary manner, and meanwhile, other performances of the radar can be tested in an auxiliary manner, so that the accuracy and the comprehensiveness of the radar test are improved.

The invention also provides a radar production line testing method which is applied to the radar production line testing system, and the radar production line testing method comprises the following steps:

a radar to be tested transmits a test signal;

receiving the test signal by a test antenna;

the directional coupler generates an RX signal and a TX signal according to the test signal;

the frequency spectrum device receives the TX signal through a TX signal line and carries out frequency spectrum analysis on the TX signal;

the RX signal is used as a return signal source by an RX delay line and is reflected back by a test antenna;

and the radar to be tested receives the returned signal source and analyzes the returned signal source.

Further preferably, the receiving and spectrum analyzing of the TX signal by the spectrum device via the TX signal line includes:

the frequency reduction plate reduces the frequency of the TX signal to obtain a frequency reduction signal source;

and the frequency spectrograph carries out spectrum analysis on the frequency reduction signal source.

Further preferably, the radar to be tested further comprises before transmitting the test signal:

the radar testing device rotates the pitch angle of the radar to be tested;

and the radar testing device automatically adjusts the relative position relation between the radar to be tested and the testing antenna according to the rotating pitch angle of the radar to be tested.

Further preferably, the spectrum device further comprises a step of feeding back an upper computer for recording after receiving the TX signal through a TX signal line and performing spectrum analysis on the TX signal; and/or the presence of a gas in the gas,

and after the radar to be tested receives and analyzes the returned signal source, the method also comprises the step of feeding back the upper computer for recording.

In the technical scheme, the received test signals are divided into RX signals and TX signals through the directional coupler, the RX signals are reflected back through the RX delay line, spectrum analysis is carried out on the TX signals through spectrum equipment, radar (24G/77G) near field test/static simulation test can be achieved, operation and maintenance are convenient, the design cost is low, the test efficiency is high, the TX test mode and the RX test mode of radar test can be met simultaneously, the test requirements of a radar production line are met, and the radar production line does not need to be tested through two systems.

Drawings

The foregoing features, technical features, advantages and implementations of which will be further described in the following detailed description of the preferred embodiments in a clearly understandable manner in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural diagram of an embodiment of a radar production line test system according to the present invention;

FIG. 2 is an enlarged schematic view of a directional coupler in an embodiment of a radar production line test system according to the present invention;

FIG. 3 is a schematic structural diagram of an embodiment of a radar testing apparatus according to the present invention;

FIG. 4 is a diagram illustrating a state of a radar testing apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating the calculation of the compensation angle in the Y-axis direction according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of another embodiment of a radar testing device according to the present invention;

fig. 7 is a schematic flowchart of an embodiment of a radar production line testing method according to the present invention.

Description of reference numerals:

the method comprises the following steps of 1-testing a camera obscura, 2-testing a radar to be tested, 3-testing an antenna, 4-directional coupler, 5-RX delay line, 6-TX signal line, 7-frequency spectrum equipment, 8-industrial personal computer, 9-short circuit piece, 10-supporting base, 11-first horizontal sliding rail, 12-supporting piece, 13-vertical orientation rotary table, 14-clamp, 15-second horizontal sliding rail, 16-vertical sliding rail and 17-horizontal orientation rotary table.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that the drawings in the following description are merely exemplary of the invention and that other drawings and embodiments may be devised by those skilled in the art without the use of inventive faculty.

In an embodiment of the present invention, a radar production line testing system, as shown in fig. 1 and 2, includes: testing a dark box 1; the radar to be tested 2 is arranged on one side inside the testing camera bellows 1; the testing antenna 3 is arranged on the other side of the inside of the testing camera bellows 1 opposite to the radar 2 to be tested, and the testing antenna 3 and the radar 2 to be tested are arranged at the same height and used for receiving and transmitting testing signals sent by the radar 2 to be tested; a directional coupler 4 connected to the test antenna 3 for generating an RX signal and a TX signal from the test signal received by the test antenna 3; an RX delay line 5 connected to the directional coupler 4 for reflecting the RX signal generated by the directional coupler 4 back through the test antenna 3 as a return signal source; the frequency spectrum device 7 is connected with the directional coupler 4 through a TX signal wire 6 and arranged outside the testing dark box 1 and is used for carrying out frequency spectrum analysis on the TX signal; and the industrial personal computer 8 is used for controlling the work of the radar production line test system and analyzing test data, and the industrial personal computer 8 is respectively connected with the radar 2 to be tested and the spectrum equipment 7.

In the embodiment, a directional coupler 4 connected with a test antenna 3 is arranged in a radar production line test system, and a test signal received by the test antenna 3 is divided into an RX signal and a TX signal, wherein the RX signal is short-circuited and returned through an RX delay line 5, and a returned signal source received by a radar 2 to be tested and returned is immediately analyzed, wherein the analysis comprises the analysis of the angle of the returned signal, the RCS (radar scattering cross section area) and the like; the TX signal enters the frequency spectrum device 7 after passing through the TX signal wire 6, and then the frequency spectrum device 7 performs frequency spectrum analysis on the TX signal, so that the near-field test of the radar is realized, the system cost is reduced, and the test efficiency is improved. In a TX test mode, an industrial personal computer is connected with the spectrum equipment, receives analysis data of the spectrum equipment and further analyzes and displays the analysis data; in an RX test mode, the industrial personal computer is connected with the radar to be tested, receives the analysis data of the radar to be tested on the return signal source and carries out further analysis and display. According to the test process, the radar production line test system is provided with the test antenna 3 to simultaneously test the performance of the radar transmitter and the radar function, and two systems are not required to be separated for testing, so that the test time is saved.

The test antenna 3 is a 24G antenna or a 77G antenna, and the antenna can be replaced according to the requirement in the test process. The RX delay line 5 includes a shorting strip 9 for shorting the RX signal generated by the directional coupler 4 and returning the RX signal through the test antenna 3, that is, the RX signal in the two signals split by the directional coupler 4 returns through the test antenna 3.

The frequency spectrum equipment 7 comprises a frequency reduction plate and a frequency spectrograph, wherein the frequency reduction plate is connected with the directional coupler 4 through a TX signal line 6 and is used for reducing the frequency of a TX signal generated by the directional coupler 4 to obtain a frequency reduction signal source; the frequency spectrograph is connected with the frequency reduction plate and used for carrying out frequency spectrum analysis on the frequency reduction signal source. In the process, the performance of the radar transmitter is tested according to the analysis of the frequency spectrum analyzer on the frequency reduction signal. The type of the down-converter is not specifically limited, as long as the down-converted signal can satisfy the performance of the spectrometer, which is included in this embodiment, for example, for a 24G antenna power of 20dB (decibel), the down-converter down-converts the down-converted signal to within 2.5G; for a 77G antenna power of 30dB, the down-conversion plate down-converts it to within 2.5G.

In other embodiments, the radar production line testing system further includes an upper computer respectively connected to the radar to be tested and the spectrometer. Therefore, the radar to be tested receives the return signal source, analyzes the return signal source and feeds the return signal source back to the upper computer for recording; and the frequency spectrograph feeds the TX signal back to the upper computer for recording after carrying out frequency spectrum analysis. In addition, the radar production line testing system also comprises a darkroom wave absorbing material adhered to the four walls of the testing darkroom and used for absorbing clutter, a display screen used for displaying the analysis result of the returned signal source received by the radar to be tested, a power adapter connected with the radio frequency equipment and the like.

The embodiment is obtained by improving the above embodiment, and in this embodiment, the radar production line testing system includes: testing a dark box 1; a radar 2 to be tested is arranged on one side inside the testing camera bellows 1 through a radar testing device; the testing antenna 3 is arranged on the other side of the inside of the testing camera bellows 1 opposite to the radar 2 to be tested, and the testing antenna 3 and the radar 2 to be tested are arranged at the same height and used for receiving and transmitting testing signals sent by the radar 2 to be tested; a directional coupler 4 connected to the test antenna 3 for generating an RX signal and a TX signal from the test signal received by the test antenna 3; an RX delay line 5 connected to the directional coupler 4 for reflecting the RX signal generated by the directional coupler 4 back through the test antenna 3 as a return signal source; the frequency spectrum device 7 is connected with the directional coupler 4 through a TX signal wire 6 and arranged outside the testing dark box 1 and is used for carrying out frequency spectrum analysis on the TX signal; and an industrial personal computer 8 for controlling the radar production line test system to work.

Specifically, as shown in fig. 3, the radar testing apparatus includes: a support base 10; a first horizontal slide rail 11 disposed on the surface of the support base 10; the supporting part 12 is used for supporting the radar to be tested 2 at a preset height and driving the radar to be tested to horizontally move in the first horizontal sliding rail along the first axial direction, and the supporting part 12 is connected above the first horizontal sliding rail in a sliding mode; a vertical direction rotary table 13 for driving the radar 2 to be tested to rotate along the vertical direction, and the vertical direction rotary table is rotatably connected to the upper end part of the support part 12; the clamp 14 is used for clamping the radar 2 to be tested and is fixedly connected with the vertical direction rotary table 13; and the driving device is used for controlling the first horizontal sliding rail 11 and the vertical direction rotary table 13 to act, and is respectively and electrically connected with the industrial personal computer 8, the first horizontal sliding rail 11 and the vertical direction rotary table 13.

In this embodiment, the industrial computer drives the support 12 and the vertical orientation rotary table 13 connected with the industrial computer through the driving device to move so as to adjust the radar 2 to be tested to a proper position. It should be understood that, the position of the radar to be tested and the radio frequency rear end 7 (test antenna) arranged oppositely in the radar production line test system is relatively fixed, if the radar is to be subjected to the pitch angle performance test, the vertical direction rotary table 13 drives the radar to be tested to rotate by a certain angle, and then a certain included angle is generated between the radar and the radio frequency rear end 7, so that the first horizontal slide rail 11 and the supporting piece 12 matched with the first horizontal slide rail are arranged in the radar test device, the radar to be tested 2 is driven to move along the connecting line direction (horizontal Y axis direction) of the radar and the radio frequency rear end 7 by sliding the supporting piece 12 in the first horizontal slide rail 11, the two are ensured to be concentric, and no angle error occurs.

Specifically, the position where the driving device is disposed is not particularly limited, and it may be disposed inside the support base 10, or the like. The rotation range of the vertical orientation rotary table 13 is-10 ° to 10 °, the rotation precision is set according to actual requirements, for example, 0.1 °, and in other embodiments, the rotation range may be limited according to actual requirements. The vertical direction rotary table 13 comprises a fixed part fixed at the upper end of the support part 12 and a rotating part rotatably connected with the fixed part, the clamp 14 is fixed at the rotating part to clamp the radar 2 to be tested, the fixed part and the rotating part are connected through a rotating shaft, and the driving device drives the radar 2 to be tested to rotate in the vertical direction by controlling the rotating shaft to rotate. It should be noted that the vertical direction is a direction perpendicular to the supporting base 10, and the rotation of the radar 2 to be tested by the vertical direction turntable is embodied as a pitching rotation based on the horizontal direction of the radar 2 to be tested toward the testing antenna 3.

Any method may be adopted to realize the sliding of the supporting member in the first horizontal sliding rail, such as providing a sliding rail in the first horizontal sliding rail, providing a matching pulley at the bottom of the supporting member 12 to facilitate the sliding of the supporting member in the first horizontal sliding rail, and the like. The sliding rail may be disposed with a slot inside the first horizontal sliding rail (the size of the slot matches the slidable range of the supporting member), or disposed on the surface of the first horizontal sliding rail, which is not limited herein. In addition, the moving range of the support member in the first horizontal sliding rail 11 is defined according to the actual situation by referring to the distance between the radar to be tested and the radio frequency rear end, the rotation angle of the vertical direction rotary table 13, and other parameters, for example, in an example, the distance between the radar to be tested and the radio frequency rear end is 2000mm (millimeter), the rotation range of the vertical direction rotary table 13 is-10 to 10 degrees, and the moving range of the support member 12 in the first horizontal sliding rail 11 is defined as-200 to 200mm (with the sliding rail center as the origin). And before testing, the incidence relation between the rotation angle of the vertical direction rotary table 13 and the sliding distance of the first horizontal sliding rail 11 is prestored according to parameters such as the distance between the radar to be tested and the radio frequency rear end, the moving range of the first horizontal sliding rail 11 and the like. Therefore, when in testing, the driving device automatically controls the movement of the supporting piece 12 according to the rotating angle of the vertical direction rotary table 13, accurately controls the position of the radar to be tested, and ensures that an included angle cannot be formed between the radar and the rear end of the radio frequency.

In an example, a state diagram of the radar testing apparatus is shown in fig. 4 (a solid line is an initial state, and a dotted line is a moved state), in the radar production line testing system, after the vertical direction rotary table 13 drives the radar 2 to be tested to rotate upwards by the angle θ, the driving apparatus calculates values of the compensation distances L and D according to a formula tan θ ═ D/L, where L is a distance between the radar 2 to be tested and the testing antenna 3, and D is an upward displacement of one side of the radar 2 to be tested in a vertical direction (a displacement to be tested) in the vertical direction (a displacement to be tested is measured)The distance between the test radar and the horizontal line after pitching). Assuming that the maximum value of the relative displacement Δ D in the vertical direction on one side of the radar 2 to be tested is 50mm, the movable distance Δ L of the support 12 in the first horizontal slide rail 11 (the moving direction is the Y-axis direction) is 200mm, and the distance L between the radar 2 to be tested and the antenna 3 to be tested is 2000mm, the maximum compensation angle is tan Δ θ₁Δ D/Δ L, Δ θ can be obtained₁Approximately equal to 7 degrees; as shown in FIG. 5, the maximum compensation angle in the Y-axis direction is tan Δ θ₂＝tanθ₁-tanθ₂Δ θ was obtained from tan (50/2000) -tan (50/2400)₂And is approximately equal to 0.3. Namely, in the radar production line testing system, automatic compensation within 7 degrees of the pitch angle of the radar 2 to be tested and within 0.3 degree of the Y-axis direction can be realized.

In another embodiment, the radar testing device includes a supporting base 10, a first horizontal sliding rail 11, a supporting member 12, a vertical orientation rotating table 13, a fixture 14, a driving device, and a second horizontal sliding rail 15, wherein the first horizontal sliding rail 11 is slidably disposed above the second horizontal sliding rail 15, the supporting member 12 is slidably connected above the first horizontal sliding rail 11, the first axial direction and the second axial direction are perpendicular to each other (the first horizontal sliding rail and the second horizontal sliding rail are perpendicular to each other), and the first horizontal sliding rail is connected with the driving device.

In this embodiment, set up second horizontal slide rail 15 outside setting up first horizontal slide rail 11 in the radar testing device, and second horizontal slide rail 15 slides and sets up in first horizontal slide rail 11 below, drives the radar that awaits measuring in first horizontal slide rail 11 towards first axial horizontal migration through support piece 12, drives the radar that awaits measuring towards second axial horizontal migration in second horizontal slide rail 15 through first horizontal slide rail 11, and the first axial of assumption is along Y axle direction, then the second axial is along X axle direction. In the performance test process of the radar to be tested, the positions of the radar to be tested in two axial directions are adjusted through the support part 12 and the first horizontal slide rail 11, so that the positions of the radar to be tested can be more accurately regulated and controlled. Similar to the moving range of the support 12 in the first horizontal slide rail 11, the moving range of the first horizontal slide rail 11 in the second horizontal slide rail 15 is also defined according to parameters such as the distance between the radar to be tested and the radio frequency rear end 7, the rotating angle of the vertical rotary table 13, and the like in practical application, for example, the distance between the radar to be tested and the radio frequency rear end 7 is 2000mm, the rotating range of the vertical rotary table 13 is-10 to 10 degrees, the moving range of the support 12 in the first horizontal slide rail 11 is-200 to 200mm, and the moving range of the first horizontal slide rail 11 in the second horizontal slide rail 15 is-200 to 200 mm. In addition, any conventional method may be used to realize the sliding of the first horizontal sliding rail 11 in the second horizontal sliding rail 15, such as providing a sliding rail in the second horizontal sliding rail 15, providing a matching pulley at the bottom of the first horizontal sliding rail 11, and the like, which is not limited herein. The sliding rail may be a groove (the size of the groove matches the slidable range of the first horizontal sliding rail) in the second horizontal sliding rail, or may be disposed on the surface of the second horizontal sliding rail, which is not limited herein.

In another embodiment, the supporting member 12 includes a vertical slide rail for driving the radar 2 to be tested to move along a vertical direction, the vertical slide rail is disposed at an upper end portion of the supporting member 12, and the vertical direction turntable 13 is slidably connected to the supporting member 12 through the vertical slide rail.

In this embodiment, in order to adjust the height of the radar 2 to be tested in the vertical direction, a vertical slide rail 16 is disposed on the support 12 above the first horizontal slide rail 11, specifically, the length of the vertical slide rail 16 is set according to the moving range of the radar 2 to be tested in the vertical direction, so that the driving device controls the vertical direction rotary table 13 to slide along the vertical slide rail according to the requirement to adjust the height of the radar 2 to be tested so as to be on the same horizontal line with the testing antenna 3. In the radar testing device, the position of the radar 2 to be tested is accurately controlled by matching the support piece 12/the first horizontal slide rail 11/the second horizontal slide rail through the vertical rail, so that the accuracy of a radar production line testing system is further improved. The moving range of the vertical slide rail is limited according to requirements, and in one example, the moving range of the vertical slide rail is-25 mm.

In another embodiment, as shown in fig. 6, the radar testing device includes a supporting base 10, a first horizontal slide rail 11, a supporting member 12, a vertical direction rotating platform 13, a fixture 14, and a driving device, and further includes a horizontal direction rotating platform 17 for driving the radar 2 to be tested to rotate along a horizontal direction, the horizontal direction rotating platform 17 is rotatably disposed on the surface of the supporting base 10, the first horizontal slide rail is slidably disposed on the surface of the horizontal direction rotating platform 17, and the horizontal direction rotating platform 17 is electrically connected to the driving device. In other embodiments, the radar testing device includes a supporting base 10, a first horizontal sliding rail 11, a second horizontal sliding rail 15, a supporting member 12, a vertical direction rotating platform 13, a fixture 14, and a driving device, and further includes a horizontal direction rotating platform 17 for driving the radar 2 to be tested to rotate along a horizontal direction, the second horizontal sliding rail is disposed on a surface of the horizontal direction rotating platform, the first horizontal sliding rail is slidably disposed above the second horizontal sliding rail, and the supporting member is slidably disposed above the first horizontal sliding rail.

In this embodiment, in order to further adjust the range of the radar 2 to be tested in the horizontal direction, a horizontal orientation rotary table 17 is arranged above the support base 10, and the radar 2 to be tested is rotated to a required position, specifically, the rotation range of the horizontal orientation rotary table 17 is-180 ° to 180 °, and the accuracy can be set according to the actual situation, for example, set to 0.1 °. The horizontal direction rotary table 17 improves the accuracy of a radar production line testing system, and is helpful for the all-dimensional test of the performance of the radar 2 to be tested, and the performance of the radar 2 to be tested at each angle.

In the process of testing the pitch angle performance of the radar to be tested, after the vertical azimuth turntable drives the radar to be tested to rotate by a certain angle, the driving device further adjusts the position of the radar to be tested by controlling the supporting piece, the first horizontal slide rail/the second horizontal slide rail and the horizontal azimuth turntable to act according to the angle and the pre-stored association relation, so that the testing purpose is realized.

The invention also provides a radar production line testing method, which is applied to the radar production line testing system, and as shown in fig. 7, the radar production line testing method comprises the following steps: s10 the radar to be tested transmits a test signal; s20 the test antenna receives the test signal; s30 the directional coupler generates RX signal and TX signal according to the test signal; s40, the frequency spectrum device receives the TX signal through the TX signal line and carries out frequency spectrum analysis on the TX signal; the S50RX delay line takes the RX signal as a return signal source and reflects the signal back through the test antenna; s60 the radar to be tested receives the returned return signal source and analyzes.

In the embodiment, a directional coupler connected with a test antenna is arranged to divide a test signal received by the test antenna into an RX signal and a TX signal, wherein the RX signal is returned through an RX delay line in a short circuit manner, and a return signal source received and returned by a radar to be tested immediately analyzes the RX signal, including analyzing the angle of the return signal, the RCS (radar scattering cross section area) and the like; the TX signal enters the frequency spectrum equipment after passing through the TX signal wire, and then the frequency spectrum equipment performs frequency spectrum analysis on the TX signal, so that the near-field test of the radar is realized, the system cost is reduced, and the test efficiency is improved. In addition, according to the test process, the radar production line test system is provided with one test antenna to simultaneously test the performance of the radar transmitter and the radar function, and two systems are not required to be used for testing, so that the test time is saved. It is noted that here the steps of the spectrum device analyzing the TX signal and the steps of the RX delay line short-circuiting the RX signal back do not have a sequence. In addition, before the radar is to be tested, a step of selecting a test mode is also included, and when the TX test mode is selected, the emission performance of the radar is tested; when an RX test module is selected, testing the self-sending and self-receiving performance of the radar; when the TX test mode and the RX test module are selected, the transmission performance and the self-transmitting and self-receiving performance are tested simultaneously.

The test antenna is a 24G antenna or a 77G antenna, and the antenna can be replaced according to the requirement in the test process. The RX delay line includes a shorting strip for shorting the RX signal generated by the directional coupler 4 and returning the RX signal through the test antenna, i.e. the RX signal in the two signals split by the directional coupler is returned through the test antenna.

The frequency spectrum equipment comprises a frequency reduction plate and a frequency spectrograph, wherein the frequency reduction plate is connected with the directional coupler through a TX signal line and is used for reducing the frequency of a TX signal generated by the directional coupler to obtain a frequency reduction signal source; the frequency spectrograph is connected with the frequency reduction plate and used for carrying out frequency spectrum analysis on the frequency reduction signal source. In the process, the performance of the radar transmitter is tested according to the analysis of the frequency spectrum analyzer on the frequency reduction signal. The type of the down-converter is not specifically limited, as long as the down-converted signal can satisfy the performance of the spectrometer, which is included in this embodiment, for example, for a 24G antenna power of 20dB (decibel), the down-converter down-converts the down-converted signal to within 2.5G; for a 77G antenna power of 30dB, the down-conversion plate down-converts it to within 2.5G.

In other embodiments, after step S60, the method further includes a step of feeding back the return signal source to be tested to the upper computer for recording after the return signal source is received and analyzed by the radar to be tested, and a step of feeding back the TX signal to the upper computer for recording after the TX signal is subjected to spectrum analysis by the spectrum device. In addition, the radar production line testing system also comprises a darkroom wave absorbing material adhered to the four walls of the testing darkroom and used for absorbing clutter, a display screen used for displaying the analysis result of the returned signal source received by the radar to be tested, a power adapter connected with the radio frequency equipment and the like.

The embodiment is obtained by improving the above embodiment, and in this embodiment, the method for testing the radar production line includes: s01, rotating the pitch angle of the radar to be tested by the radar testing device; s02 the radar testing device automatically adjusts the relative position relation between the radar to be tested and the testing antenna according to the rotating pitch angle of the radar to be tested; s10 the radar to be tested transmits a test signal; s20 the test antenna receives the test signal; s30 the directional coupler generates RX signal and TX signal according to the test signal; s40, the frequency spectrum device receives the TX signal through the TX signal line and carries out frequency spectrum analysis on the TX signal; the S50RX delay line takes the RX signal as a return signal source and reflects the signal back through the test antenna; s60 the radar to be tested receives the returned return signal source and analyzes.

In this embodiment, referring to the structure of the radar testing device, before testing the performance of the radar to be tested, the position of the radar to be tested is compensated according to the rotation angle of the vertical orientation rotary table in the radar testing device, so that the radar to be tested is concentric with the radar to be tested. And then, the industrial personal computer controls the radar to be tested to send a test signal, and the test signal is received by the test antenna and then divided into an RX signal and a TX signal by the directional coupler. Then the TX signal enters the frequency spectrum equipment through a TX signal wire for frequency spectrum analysis; the RX signal is short-circuited and returned by the test antenna through the RX delay line, so that a return signal source returned by the radar to be tested is received and analyzed, the radar (24G/77G) near field test is realized, the design cost is low, the test efficiency is high, and the test requirement of a radar production line can be met.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be construed as the protection scope of the present invention.