During the CIOE (China International Optoelectronic Exposition) Aview CEO Inman.He. He was invited by the exhibition to speak.
Time: 2020.9.10 15:00 – 15:45
Content: Analysis of the challenges and solutions of ADAS&AD active sensing.
ADAS&AD active sensing challenges
Active: MMW Radar; Lidar
Signal transmission source is adopted. Obtain relevant information based on TOF （time - of - light）awareness environment.
Passive: Automotive Camera
The optical signal of 400-100nm wavelength is received by CCD/CMOS and converted into image signal.
Introduction to MMW radar
MMW radar system 4 parameters.
► Distance (range, analytical accuracy)
► Speed (range, analytical accuracy)
► Angle (field of view, Angle accuracy)
► Radar cross section (RCS)
Automotive MMW radar design challenge
► Simple FMCW systems can’t meet the needs of current vehicle traffic detection.
► The influence of a complex environment on MMW Radar detection.
► 24GHz and 77GHz MMW circuit and antenna's influence on the system.
► Verification of application effect of new technology in automotive MMW radar, semiconductor technology, phased array, etc.
Difficulties in automotive MMW radar test
► CATR chamber false target optimization.
► -40°~ 85°radar performance changes.
► Test of radar materials: PCB materials and radar antenna equivalent dielectric and loss parameters.
► Radar anti-jamming test: radar, environment jamming.
MMW radar auto assembly and test
Testing Process
Test Item
1) Transmit wave test
We can test follow signal parameter:
• PRP-pulse repeat period
• Modulation bandwidth
• FMCW linearity
• Peak power
• Average power
• Modulation signal slope
2) Speed test
Theory: Doppler principle
3）Angle test
Mechanical motion moves to test angle.
4）Distance test
Use time of flight to measure distance.
5) Ability to draw power diagram.
Test equipment.
E8708A Radar target simulator 79GHz
⇒ E8708A-H02 Double horn antenna radar test system. ⇒ E8708A-D01 Radar target simulator full delay module.
⇒ E8708A-LAS Built-in positioning radar
⇒ E8708A-DPP Built-in Doppler measurement function
⇒ Frequency range : 76~81 GHz, Intermediate frequency output: 1~5GHz
E8740A-DS1 Oscilloscope
⇒ Type: DSOS604A ⇒ Storage depth: standard 100Mpts/ channel, scalable to 400Mpts/ channel
⇒ Sampling rate: 20GSa/s 2channels. 10Sa/s 4 channels.
⇒ Bandwidth: 6GHz
89601B Vector signal analysis software
⇒ 89601B-200 Basic vector signal analysis and hardware connectivity, transmission licensing ⇒ 89601B-BHP FMCW radar analysis, transmission licensing
Automotive camera application category
Automotive interior infrared & 3D camera
♦ DMS
♦ DVR
♦ TOF
♦ AR HUD
Black & side cameras
♦ IPA (Intelligent Parking Assist)
♦ Automotive meets will warning
♦ Intersection auxiliary
♦ ROW (rear collision warning)
360AVM camera
♦ APA
♦ Automotive meets will warning.
♦ TJA (Traffic Jam Assist)
ADAS front camera (monocular/binocular/Ternary)
♦ ACC
♦ LKA/LDW
♦ AEB
♦ FCW (Forward collision warning)
♦ AFL (Adaptive Front Light)
♦ TSR (Traffic signs recognition)
Image capture board
Collimator
High & low temperature burn-in
Automotive camera defocus measurement
Automotive camera calibration and test
Calibration output
► Focal length
► Main point
► Distortion center
► Distortion parameters
Convert distorted pixels to corrected pixels
Triathlon
AA + Test + Assembly
Auto Assembly Line
• Auto load/unload
• Auto assembly
• Auto screw lock
• Auto laser welding
• MES
Active Alignment
• Plasma Clean & Activation
• Sensor Particle Inspection
• Dispensing/Vision Inspection
• Sensor Planarity Inspection
• AA LENS/AA PCBA
• Calibration
• De-focus Measurement
Function Test
• Image Quality Test
• Leakage Test
• Low/High Temp. Burn-in Test
• Calibration
.jpg)
