CN109471076A - A kind of millimetre-wave radar non-contact test method - Google Patents
A kind of millimetre-wave radar non-contact test method Download PDFInfo
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- CN109471076A CN109471076A CN201811222001.5A CN201811222001A CN109471076A CN 109471076 A CN109471076 A CN 109471076A CN 201811222001 A CN201811222001 A CN 201811222001A CN 109471076 A CN109471076 A CN 109471076A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 238000005259 measurement Methods 0.000 claims description 32
- 238000004088 simulation Methods 0.000 claims description 10
- 238000011056 performance test Methods 0.000 claims description 9
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers
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Abstract
The present invention relates to a kind of millimetre-wave radar non-contact test methods, the specific steps of which are as follows: (1) installs radar；(2) radar return signal；(3) radar signal frequency conversion；(4) it is superimposed；According to test target, corresponding testing process is designed, the target information that radar exports is compared with the information that target simulator exports, the test of radar performance may be implemented by each step in testing process；Radar, turntable, receiving antenna and transmitting antenna, upconverter and low-converter are in darkroom, guarantee that test will not be interfered by extraneous radiofrequency signal；The present invention can multiple simulated targets speed, angle, amplitude, while independent receiving and transmitting signal reduces the possibility for generating interference.
Description
Technical field
The present invention relates to millimetre-wave radar the field of test technology, specifically a kind of millimetre-wave radar non-contact test method.
Background technique
As auxiliary drives, the development of automatic Pilot, millimetre-wave radar, millimeter wave thunder are mounted on more and more automobiles
Up to as sensor, main function is the barrier detected around vehicle body in some region, radar can detect target distance,
Speed, angle, amplitude information, the basic performance of radar includes ranging, test the speed, angle measurement accuracy and resolution ratio, distance, speed, angle
Spend multi-sources distinguishing rate.It when production, needs to test these basic performances of radar, simplest test is pendulum
Realistic objective is put, is detected with radar, this method is simple, but test coverage is inadequate, and repeatable accuracy is not high, can not meet
Production requirement, in actual production, it is desirable to be able to test transmitter performance, receiver performance, the target acquisition performance of radar, it is desirable that
Test macro is stablized repeatable.
Such as a kind of radar auxiliary testing system and its test method that China Patent Publication No. is CN201310473881.4
In a manner of substituting the radar test of skimulated motion target, the accuracy and Discussing Convenience of radar test are improved.It assists surveying using radar
Test system is vibrated by signal processor, receiver, control and timer, waveform generator, main vibration amplifying type transmitter, frequency stabilization
Device, transmit-receive switch and antenna are constituted；The signal processor is connected by receiver, transmit-receive switch with antenna, to be measured to obtain
The signal of radar, signal processor are also connected with control with timer, to control waveform hair respectively with timer by control
The work of raw device, main vibration amplifying type transmitter, resonator oscillator, receiver；The resonator oscillator is respectively to main vibration amplifying type
Transmitter, receiver tranmitting data register signal；The main vibration amplifying type transmitter receives the waveform signal of waveform generator, and passes through
Transmit-receive switch is transmitted to antenna, and major function is simulated target speed, can not for the speed, angle, amplitude of simulated target
Simulation, versatility are poor.
Summary of the invention
To solve the above-mentioned problems, the present invention proposes a kind of millimetre-wave radar non-contact test method.
A kind of millimetre-wave radar non-contact test method, the specific steps of which are as follows:
(1) install radar: radar to be measured is mounted on the turntable of testboard bay；
(2) radar receives: the receiving antenna that the signal of radar emission is tested rack receives；
(3) radar signal frequency conversion: enter low-converter and down coversion is carried out to signal, generate intermediate-freuqncy signal；
(4) be superimposed: by target generator generate Signal averaging get on, by upconverter to the signal containing target into
Row up-conversion is transmitted to radar to be measured eventually by antenna.
Radar, turntable, receiving antenna and the transmitting antenna, upconverter and low-converter are in darkroom, are protected
Card test will not be interfered by extraneous radiofrequency signal, and the control with upconverter and low-converter cooperation is provided with outside the darkroom
Device, signal analyzer and target simulator processed.
The test of the radar angle measurement performance of the step (1) is to cooperate to carry out by turntable, in normal target simulation
When, control turntable rotates by a certain angle, and the angle of radar output should also have corresponding variation, the target angle of comparison radar output
Variation changes with turntable actual angle, obtains radar angle measurement performance.
The frequency conversion steps of the step (3) are as follows: a: the receiving antenna that the signal of radar emission is tested rack receives,
It into low-converter, is mixed with local oscillator, keeps the modulating characteristic of radar wave constant, the frequency electromagnetic waves of radar emission are become
It changes in lower IF frequency, convenient for being further processed；
B: the intermediate-freuqncy signal entering signal analyzer of generation, signal analyzer can divide the modulation parameter of radar wave
Whether analysis, examine the transmitter performance of radar normal；
C: the echo signal that intermediate-freuqncy signal is generated with target simulator again is mixed, and mixing uses orthogonal mixing, target
Simulator can simulate the distance, speed, amplitude information of single or multiple targets, and the signal for being mixed output is to be simulated comprising thinking
Target information；
D: the intermediate-freuqncy signal containing simulated target information transforms in the working frequency of radar using upconverter, leads to
Transmitting antenna is crossed to launch.
The step (4) carries out transmitter waveform test after obtaining signal:
Radar is adjusted to state to be measured, is analyzed by intermediate-freuqncy signal of the signal analyzer to down coversion, obtains thunder
Bandwidth, modulation linearity degree, the transmission power parameter reached compares with the preset modulation parameter of radar, judges Radar Transmitter Performance
It is whether normal.
The step (4) carries out range performance test after obtaining signal:
Generate a maximum distance target, target amplitude be transferred to minimum, examine radar whether can accurately measure target away from
From and amplitude；
Generate a minimum distance target, target amplitude be transferred to maximum, examine radar whether can accurately measure target away from
From and amplitude；
Generate a moderate distance target, target amplitude be transferred to minimum, examine radar whether can accurately measure target away from
From and amplitude.
The step (4) carries out performance test of testing the speed after obtaining signal:
A maximum distance target is generated, by target velocity setting to maximum speed, examines whether radar can accurately measure
Distance and speed；
A maximum distance target is generated, by target velocity setting to minimum speed, examines whether radar can accurately measure
Distance and speed；
A minimum distance target is generated, by target velocity setting to maximum speed, examines whether radar can accurately measure
Distance and speed；
A minimum distance target is generated, by target velocity setting to minimum speed, examines whether radar can accurately measure
Distance and speed.
The step (4) carries out angle measurement performance test after obtaining signal:
A maximum distance target is generated, turntable is controlled, goes to radar angle measurement most lower limit, examines whether radar can accurately be surveyed
Measuring angle and distance；
A maximum distance target is generated, turntable is controlled, goes to the radar angle measurement most upper limit, examines whether radar can accurately be surveyed
Measuring angle and distance；
A minimum distance target is generated, turntable is controlled, goes to radar angle measurement most lower limit, examines whether radar can accurately be surveyed
Measuring angle and distance；
A minimum distance target is generated, turntable is controlled, goes to the radar angle measurement most upper limit, examines whether radar can accurately be surveyed
Measuring angle and distance.
The step (4) obtains the laggard line-spacing descriscent multi-sources distinguishing of signal:
The target of two maximum speeds is generated, range difference is set as distance by radar multi-sources distinguishing rate between two targets,
Examine whether two targets can distinguish；
The target of two minimum speeies is generated, range difference is set as distance by radar multi-sources distinguishing rate between two targets,
Examine whether two targets can distinguish.
The step (4) obtains the laggard scanning frequency degree of signal to multi-sources distinguishing:
The target of two maximum distances is generated, speed difference is set as radar speed multi-sources distinguishing rate between two targets,
Examine whether two targets can distinguish；
The target of two minimum distances is generated, speed difference is set as radar speed multi-sources distinguishing rate between two targets,
Examine whether two targets can distinguish.
The beneficial effects of the present invention are: corresponding testing process is designed according to test target, it is each in testing process
The target information that radar exports is compared with the information that target simulator exports, the test of radar performance may be implemented by step；
Radar, turntable, receiving antenna and transmitting antenna, upconverter and low-converter are in darkroom, guarantee that test will not be by
Extraneous radiofrequency signal interference；The present invention can multiple simulated targets speed, angle, amplitude, while independent receiving and transmitting signal reduces
Generate the possibility of interference.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the principle of the present invention flow diagram.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below it is right
The present invention is further described.
Embodiment one:
As shown in Figure 1, a kind of millimetre-wave radar non-contact test method, the specific steps of which are as follows:
(1) install radar: radar to be measured is mounted on the turntable of testboard bay；
(2) radar receives: the receiving antenna that the signal of radar emission is tested rack receives；
(3) radar signal frequency conversion: enter low-converter and down coversion is carried out to signal, generate intermediate-freuqncy signal；
(4) be superimposed: by target generator generate Signal averaging get on, by upconverter to the signal containing target into
Row up-conversion is transmitted to radar to be measured eventually by antenna.
Radar, turntable, receiving antenna and the transmitting antenna, upconverter and low-converter are in darkroom, are protected
Card test will not be interfered by extraneous radiofrequency signal, and the control with upconverter and low-converter cooperation is provided with outside the darkroom
Device, signal analyzer and target simulator processed.
Controller in described Fig. 1 is PLC.
The test of the radar angle measurement performance of the step (1) is to cooperate to carry out by turntable, in normal target simulation
When, control turntable rotates by a certain angle, and the angle of radar output should also have corresponding variation, the target angle of comparison radar output
Variation changes with turntable actual angle, obtains radar angle measurement performance.
The frequency conversion steps of the step (3) are as follows: a: the receiving antenna that the signal of radar emission is tested rack receives,
It into low-converter, is mixed with local oscillator, keeps the modulating characteristic of radar wave constant, the frequency electromagnetic waves of radar emission are become
It changes in lower IF frequency, convenient for being further processed；
B: the intermediate-freuqncy signal entering signal analyzer of generation, signal analyzer can divide the modulation parameter of radar wave
Whether analysis, examine the transmitter performance of radar normal；
C: the echo signal that intermediate-freuqncy signal is generated with target simulator again is mixed, and mixing uses orthogonal mixing, target
Simulator can simulate the distance, speed, amplitude information of single or multiple targets, and the signal for being mixed output is to be simulated comprising thinking
Target information；
D: the intermediate-freuqncy signal containing simulated target information transforms in the working frequency of radar using upconverter, leads to
Transmitting antenna is crossed to launch.
The step (4) carries out transmitter waveform test after obtaining signal:
Radar is adjusted to state to be measured, is analyzed by intermediate-freuqncy signal of the signal analyzer to down coversion, obtains thunder
Bandwidth, modulation linearity degree, the transmission power parameter reached compares with the preset modulation parameter of radar, judges Radar Transmitter Performance
It is whether normal.
According to test target, corresponding testing process is designed, each step in testing process, the target that radar is exported
Information is compared with the information that target simulator exports, and the test of radar performance may be implemented；By radar, turntable, receive day
Line and transmitting antenna, upconverter and low-converter are in darkroom, guarantee that test will not be interfered by extraneous radiofrequency signal.
The present invention can multiple simulated targets speed, angle, amplitude, while independent receiving and transmitting signal reduces and generates interference
It may.
Embodiment two:
As shown in Figure 1, a kind of millimetre-wave radar non-contact test method, the specific steps of which are as follows:
(1) install radar: radar to be measured is mounted on the turntable of testboard bay；
(2) radar receives: the receiving antenna that the signal of radar emission is tested rack receives；
(3) radar signal frequency conversion: enter low-converter and down coversion is carried out to signal, generate intermediate-freuqncy signal；
(4) be superimposed: by target generator generate Signal averaging get on, by upconverter to the signal containing target into
Row up-conversion is transmitted to radar to be measured eventually by antenna.
Radar, turntable, receiving antenna and the transmitting antenna, upconverter and low-converter are in darkroom, are protected
Card test will not be interfered by extraneous radiofrequency signal, and the control with upconverter and low-converter cooperation is provided with outside the darkroom
Device, signal analyzer and target simulator processed.
Controller in described Fig. 1 is PLC.
The test of the radar angle measurement performance of the step (1) is to cooperate to carry out by turntable, in normal target simulation
When, control turntable rotates by a certain angle, and the angle of radar output should also have corresponding variation, the target angle of comparison radar output
Variation changes with turntable actual angle, obtains radar angle measurement performance.
The frequency conversion steps of the step (3) are as follows: a: the receiving antenna that the signal of radar emission is tested rack receives,
It into low-converter, is mixed with local oscillator, keeps the modulating characteristic of radar wave constant, the frequency electromagnetic waves of radar emission are become
It changes in lower IF frequency, convenient for being further processed；
B: the intermediate-freuqncy signal entering signal analyzer of generation, signal analyzer can divide the modulation parameter of radar wave
Whether analysis, examine the transmitter performance of radar normal；
C: the echo signal that intermediate-freuqncy signal is generated with target simulator again is mixed, and mixing uses orthogonal mixing, target
Simulator can simulate the distance, speed, amplitude information of single or multiple targets, and the signal for being mixed output is to be simulated comprising thinking
Target information；
D: the intermediate-freuqncy signal containing simulated target information transforms in the working frequency of radar using upconverter, leads to
Transmitting antenna is crossed to launch.
The step (4) carries out range performance test after obtaining signal:
Generate a maximum distance target, target amplitude be transferred to minimum, examine radar whether can accurately measure target away from
From and amplitude；
Generate a minimum distance target, target amplitude be transferred to maximum, examine radar whether can accurately measure target away from
From and amplitude；
Generate a moderate distance target, target amplitude be transferred to minimum, examine radar whether can accurately measure target away from
From and amplitude.
According to test target, corresponding testing process is designed, each step in testing process, the target that radar is exported
Information is compared with the information that target simulator exports, and the test of radar performance may be implemented；By radar, turntable, receive day
Line and transmitting antenna, upconverter and low-converter are in darkroom, guarantee that test will not be interfered by extraneous radiofrequency signal.
The present invention can multiple simulated targets speed, angle, amplitude, while independent receiving and transmitting signal reduces and generates interference
It may.
Embodiment three:
As shown in Figure 1, a kind of millimetre-wave radar non-contact test method, the specific steps of which are as follows:
(1) install radar: radar to be measured is mounted on the turntable of testboard bay；
(2) radar receives: the receiving antenna that the signal of radar emission is tested rack receives；
(3) radar signal frequency conversion: enter low-converter and down coversion is carried out to signal, generate intermediate-freuqncy signal；
(4) be superimposed: by target generator generate Signal averaging get on, by upconverter to the signal containing target into
Row up-conversion is transmitted to radar to be measured eventually by antenna.
Radar, turntable, receiving antenna and the transmitting antenna, upconverter and low-converter are in darkroom, are protected
Card test will not be interfered by extraneous radiofrequency signal, and the control with upconverter and low-converter cooperation is provided with outside the darkroom
Device, signal analyzer and target simulator processed.
Controller in described Fig. 1 is PLC.
The test of the radar angle measurement performance of the step (1) is to cooperate to carry out by turntable, in normal target simulation
When, control turntable rotates by a certain angle, and the angle of radar output should also have corresponding variation, the target angle of comparison radar output
Variation changes with turntable actual angle, obtains radar angle measurement performance.
The frequency conversion steps of the step (3) are as follows: a: the receiving antenna that the signal of radar emission is tested rack receives,
It into low-converter, is mixed with local oscillator, keeps the modulating characteristic of radar wave constant, the frequency electromagnetic waves of radar emission are become
It changes in lower IF frequency, convenient for being further processed；
B: the intermediate-freuqncy signal entering signal analyzer of generation, signal analyzer can divide the modulation parameter of radar wave
Whether analysis, examine the transmitter performance of radar normal；
C: the echo signal that intermediate-freuqncy signal is generated with target simulator again is mixed, and mixing uses orthogonal mixing, target
Simulator can simulate the distance, speed, amplitude information of single or multiple targets, and the signal for being mixed output is to be simulated comprising thinking
Target information；
D: the intermediate-freuqncy signal containing simulated target information transforms in the working frequency of radar using upconverter, leads to
Transmitting antenna is crossed to launch.
The step (4) carries out performance test of testing the speed after obtaining signal:
A maximum distance target is generated, by target velocity setting to maximum speed, examines whether radar can accurately measure
Distance and speed；
A maximum distance target is generated, by target velocity setting to minimum speed, examines whether radar can accurately measure
Distance and speed；
A minimum distance target is generated, by target velocity setting to maximum speed, examines whether radar can accurately measure
Distance and speed；
A minimum distance target is generated, by target velocity setting to minimum speed, examines whether radar can accurately measure
Distance and speed.
According to test target, corresponding testing process is designed, each step in testing process, the target that radar is exported
Information is compared with the information that target simulator exports, and the test of radar performance may be implemented；By radar, turntable, receive day
Line and transmitting antenna, upconverter and low-converter are in darkroom, guarantee that test will not be interfered by extraneous radiofrequency signal.
The present invention can multiple simulated targets speed, angle, amplitude, while independent receiving and transmitting signal reduces and generates interference
It may.
Example IV:
As shown in Figure 1, a kind of millimetre-wave radar non-contact test method, the specific steps of which are as follows:
(1) install radar: radar to be measured is mounted on the turntable of testboard bay；
(2) radar receives: the receiving antenna that the signal of radar emission is tested rack receives；
(3) radar signal frequency conversion: enter low-converter and down coversion is carried out to signal, generate intermediate-freuqncy signal；
(4) be superimposed: by target generator generate Signal averaging get on, by upconverter to the signal containing target into
Row up-conversion is transmitted to radar to be measured eventually by antenna.
Radar, turntable, receiving antenna and the transmitting antenna, upconverter and low-converter are in darkroom, are protected
Card test will not be interfered by extraneous radiofrequency signal, and the control with upconverter and low-converter cooperation is provided with outside the darkroom
Device, signal analyzer and target simulator processed.
Controller in described Fig. 1 is PLC.
The test of the radar angle measurement performance of the step (1) is to cooperate to carry out by turntable, in normal target simulation
When, control turntable rotates by a certain angle, and the angle of radar output should also have corresponding variation, the target angle of comparison radar output
Variation changes with turntable actual angle, obtains radar angle measurement performance.
The frequency conversion steps of the step (3) are as follows: a: the receiving antenna that the signal of radar emission is tested rack receives,
It into low-converter, is mixed with local oscillator, keeps the modulating characteristic of radar wave constant, the frequency electromagnetic waves of radar emission are become
It changes in lower IF frequency, convenient for being further processed；
B: the intermediate-freuqncy signal entering signal analyzer of generation, signal analyzer can divide the modulation parameter of radar wave
Whether analysis, examine the transmitter performance of radar normal；
C: the echo signal that intermediate-freuqncy signal is generated with target simulator again is mixed, and mixing uses orthogonal mixing, target
Simulator can simulate the distance, speed, amplitude information of single or multiple targets, and the signal for being mixed output is to be simulated comprising thinking
Target information；
D: the intermediate-freuqncy signal containing simulated target information transforms in the working frequency of radar using upconverter, leads to
Transmitting antenna is crossed to launch.
The step (4) carries out angle measurement performance test after obtaining signal:
A maximum distance target is generated, turntable is controlled, goes to radar angle measurement most lower limit, examines whether radar can accurately be surveyed
Measuring angle and distance；
A maximum distance target is generated, turntable is controlled, goes to the radar angle measurement most upper limit, examines whether radar can accurately be surveyed
Measuring angle and distance；
A minimum distance target is generated, turntable is controlled, goes to radar angle measurement most lower limit, examines whether radar can accurately be surveyed
Measuring angle and distance；
A minimum distance target is generated, turntable is controlled, goes to the radar angle measurement most upper limit, examines whether radar can accurately be surveyed
Measuring angle and distance.
According to test target, corresponding testing process is designed, each step in testing process, the target that radar is exported
Information is compared with the information that target simulator exports, and the test of radar performance may be implemented；By radar, turntable, receive day
Line and transmitting antenna, upconverter and low-converter are in darkroom, guarantee that test will not be interfered by extraneous radiofrequency signal.
The present invention can multiple simulated targets speed, angle, amplitude, while independent receiving and transmitting signal reduces and generates interference
It may.
Embodiment five:
As shown in Figure 1, a kind of millimetre-wave radar non-contact test method, the specific steps of which are as follows:
(1) install radar: radar to be measured is mounted on the turntable of testboard bay；
(2) radar receives: the receiving antenna that the signal of radar emission is tested rack receives；
(3) radar signal frequency conversion: enter low-converter and down coversion is carried out to signal, generate intermediate-freuqncy signal；
(4) be superimposed: by target generator generate Signal averaging get on, by upconverter to the signal containing target into
Row up-conversion is transmitted to radar to be measured eventually by antenna.
Radar, turntable, receiving antenna and the transmitting antenna, upconverter and low-converter are in darkroom, are protected
Card test will not be interfered by extraneous radiofrequency signal, and the control with upconverter and low-converter cooperation is provided with outside the darkroom
Device, signal analyzer and target simulator processed.
Controller in described Fig. 1 is PLC.
The test of the radar angle measurement performance of the step (1) is to cooperate to carry out by turntable, in normal target simulation
When, control turntable rotates by a certain angle, and the angle of radar output should also have corresponding variation, the target angle of comparison radar output
Variation changes with turntable actual angle, obtains radar angle measurement performance.
The frequency conversion steps of the step (3) are as follows: a: the receiving antenna that the signal of radar emission is tested rack receives,
It into low-converter, is mixed with local oscillator, keeps the modulating characteristic of radar wave constant, the frequency electromagnetic waves of radar emission are become
It changes in lower IF frequency, convenient for being further processed；
B: the intermediate-freuqncy signal entering signal analyzer of generation, signal analyzer can divide the modulation parameter of radar wave
Whether analysis, examine the transmitter performance of radar normal；
C: the echo signal that intermediate-freuqncy signal is generated with target simulator again is mixed, and mixing uses orthogonal mixing, target
Simulator can simulate the distance, speed, amplitude information of single or multiple targets, and the signal for being mixed output is to be simulated comprising thinking
Target information；
D: the intermediate-freuqncy signal containing simulated target information transforms in the working frequency of radar using upconverter, leads to
Transmitting antenna is crossed to launch.
The step (4) obtains the laggard line-spacing descriscent multi-sources distinguishing of signal:
The target of two maximum speeds is generated, range difference is set as distance by radar multi-sources distinguishing rate between two targets,
Examine whether two targets can distinguish；
The target of two minimum speeies is generated, range difference is set as distance by radar multi-sources distinguishing rate between two targets,
Examine whether two targets can distinguish.
According to test target, corresponding testing process is designed, each step in testing process, the target that radar is exported
Information is compared with the information that target simulator exports, and the test of radar performance may be implemented；By radar, turntable, receive day
Line and transmitting antenna, upconverter and low-converter are in darkroom, guarantee that test will not be interfered by extraneous radiofrequency signal.
The present invention can multiple simulated targets speed, angle, amplitude, while independent receiving and transmitting signal reduces and generates interference
It may.
Embodiment six:
As shown in Figure 1, a kind of millimetre-wave radar non-contact test method, the specific steps of which are as follows:
(1) install radar: radar to be measured is mounted on the turntable of testboard bay；
(2) radar receives: the receiving antenna that the signal of radar emission is tested rack receives；
(3) radar signal frequency conversion: enter low-converter and down coversion is carried out to signal, generate intermediate-freuqncy signal；
(4) be superimposed: by target generator generate Signal averaging get on, by upconverter to the signal containing target into
Row up-conversion is transmitted to radar to be measured eventually by antenna.
Radar, turntable, receiving antenna and the transmitting antenna, upconverter and low-converter are in darkroom, are protected
Card test will not be interfered by extraneous radiofrequency signal, and the control with upconverter and low-converter cooperation is provided with outside the darkroom
Device, signal analyzer and target simulator processed.
Controller in described Fig. 1 is PLC.
The test of the radar angle measurement performance of the step (1) is to cooperate to carry out by turntable, in normal target simulation
When, control turntable rotates by a certain angle, and the angle of radar output should also have corresponding variation, the target angle of comparison radar output
Variation changes with turntable actual angle, obtains radar angle measurement performance.
The frequency conversion steps of the step (3) are as follows: a: the receiving antenna that the signal of radar emission is tested rack receives,
It into low-converter, is mixed with local oscillator, keeps the modulating characteristic of radar wave constant, the frequency electromagnetic waves of radar emission are become
It changes in lower IF frequency, convenient for being further processed；
B: the intermediate-freuqncy signal entering signal analyzer of generation, signal analyzer can divide the modulation parameter of radar wave
Whether analysis, examine the transmitter performance of radar normal；
C: the echo signal that intermediate-freuqncy signal is generated with target simulator again is mixed, and mixing uses orthogonal mixing, target
Simulator can simulate the distance, speed, amplitude information of single or multiple targets, and the signal for being mixed output is to be simulated comprising thinking
Target information；
D: the intermediate-freuqncy signal containing simulated target information transforms in the working frequency of radar using upconverter, leads to
Transmitting antenna is crossed to launch.
The step (4) obtains the laggard scanning frequency degree of signal to multi-sources distinguishing:
The target of two maximum distances is generated, speed difference is set as radar speed multi-sources distinguishing rate between two targets,
Examine whether two targets can distinguish；
The target of two minimum distances is generated, speed difference is set as radar speed multi-sources distinguishing rate between two targets,
Examine whether two targets can distinguish.
According to test target, corresponding testing process is designed, each step in testing process, the target that radar is exported
Information is compared with the information that target simulator exports, and the test of radar performance may be implemented；By radar, turntable, receive day
Line and transmitting antenna, upconverter and low-converter are in darkroom, guarantee that test will not be interfered by extraneous radiofrequency signal.
The present invention can multiple simulated targets speed, angle, amplitude, while independent receiving and transmitting signal reduces and generates interference
It may.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and
Improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
Object defines.
Claims (10)
1. a kind of millimetre-wave radar non-contact test method, it is characterised in that: the specific steps of which are as follows:
(1) install radar: radar to be measured is mounted on the turntable of testboard bay；
(2) radar receives: the receiving antenna that the signal of radar emission is tested rack receives；
(3) radar signal frequency conversion: enter low-converter and down coversion is carried out to signal, generate intermediate-freuqncy signal；
(4) it is superimposed: the Signal averaging that target generator generates being got on, the signal containing target is carried out by upconverter
Frequency conversion is transmitted to radar to be measured eventually by antenna.
2. a kind of millimetre-wave radar non-contact test method according to claim 1, it is characterised in that: the radar,
Turntable, receiving antenna and transmitting antenna, upconverter and low-converter are in darkroom, guarantee that test will not be penetrated by extraneous
Frequency signal interference is provided with controller, signal analyzer and mesh with upconverter and low-converter cooperation outside the darkroom
Mark simulator.
3. a kind of millimetre-wave radar non-contact test method according to claim 2, it is characterised in that: the step
(1) test of radar angle measurement performance is to cooperate to carry out by turntable, and in normal target simulation, control turntable rotation is certain
Angle, the angle of radar output should also have corresponding variation, the target angle variation of comparison radar output and turntable actual angle
Variation, obtains radar angle measurement performance.
4. a kind of millimetre-wave radar non-contact test method according to claim 2, it is characterised in that: the step
(3) frequency conversion steps are as follows: a: the receiving antenna that the signal of radar emission is tested rack receives, into low-converter, with this
Vibration is mixed, and keeps the modulating characteristic of radar wave constant, and the frequency electromagnetic waves of radar emission are transformed in lower again and again
In rate, convenient for being further processed；
B: the intermediate-freuqncy signal entering signal analyzer of generation, signal analyzer can analyze the modulation parameter of radar wave,
Examine the transmitter performance of radar whether normal；
C: the echo signal that intermediate-freuqncy signal is generated with target simulator again is mixed, and mixing uses orthogonal mixing, target simulation
Device can simulate the distance, speed, amplitude information of single or multiple targets, and the signal for being mixed output includes to think target to be simulated
Information；
D: the intermediate-freuqncy signal containing simulated target information transforms in the working frequency of radar using upconverter, passes through hair
Antenna is penetrated to launch.
5. a kind of millimetre-wave radar non-contact test method according to claim 2, it is characterised in that: the step
(4) transmitter waveform test is carried out after obtaining signal:
Radar is adjusted to state to be measured, is analyzed by intermediate-freuqncy signal of the signal analyzer to down coversion, obtains radar
Bandwidth, modulation linearity degree, transmission power parameter compare with the preset modulation parameter of radar, whether judge Radar Transmitter Performance
Normally.
6. a kind of millimetre-wave radar non-contact test method according to claim 2, it is characterised in that: the step
(4) range performance test is carried out after obtaining signal:
Generate a maximum distance target, target amplitude be transferred to minimum, examine radar whether can accurately measure target range and
Amplitude；
Generate a minimum distance target, target amplitude be transferred to maximum, examine radar whether can accurately measure target range and
Amplitude；
Generate a moderate distance target, target amplitude be transferred to minimum, examine radar whether can accurately measure target range and
Amplitude.
7. a kind of millimetre-wave radar non-contact test method according to claim 2, it is characterised in that: the step
(4) performance test of testing the speed is carried out after obtaining signal:
A maximum distance target is generated, by target velocity setting to maximum speed, examines whether radar can accurately measure distance
And speed；
A maximum distance target is generated, by target velocity setting to minimum speed, examines whether radar can accurately measure distance
And speed；
A minimum distance target is generated, by target velocity setting to maximum speed, examines whether radar can accurately measure distance
And speed；
A minimum distance target is generated, by target velocity setting to minimum speed, examines whether radar can accurately measure distance
And speed.
8. a kind of millimetre-wave radar non-contact test method according to claim 2, it is characterised in that: the step
(4) angle measurement performance test is carried out after obtaining signal:
A maximum distance target is generated, turntable is controlled, goes to radar angle measurement most lower limit, examines whether radar can accurately measure angle
Degree and distance；
A maximum distance target is generated, turntable is controlled, goes to the radar angle measurement most upper limit, examines whether radar can accurately measure angle
Degree and distance；
A minimum distance target is generated, turntable is controlled, goes to radar angle measurement most lower limit, examines whether radar can accurately measure angle
Degree and distance；
A minimum distance target is generated, turntable is controlled, goes to the radar angle measurement most upper limit, examines whether radar can accurately measure angle
Degree and distance.
9. a kind of millimetre-wave radar non-contact test method according to claim 2, it is characterised in that: the step
(4) the laggard line-spacing descriscent multi-sources distinguishing of signal is obtained:
The target of two maximum speeds is generated, range difference is set as distance by radar multi-sources distinguishing rate between two targets, examines
Whether two targets can distinguish；
The target of two minimum speeies is generated, range difference is set as distance by radar multi-sources distinguishing rate between two targets, examines
Whether two targets can distinguish.
10. a kind of millimetre-wave radar non-contact test method according to claim 2, it is characterised in that: the step
(4) the laggard scanning frequency degree of signal is obtained to multi-sources distinguishing:
The target of two maximum distances is generated, speed difference is set as radar speed multi-sources distinguishing rate between two targets, examines
Whether two targets can distinguish；
The target of two minimum distances is generated, speed difference is set as radar speed multi-sources distinguishing rate between two targets, examines
Whether two targets can distinguish.
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