Advanced driver assistance systems (ADAS) have grown rapidly over the past five years, from safety features such as adaptive cruise control (ACC) to safety features such as emergency braking to the latest applications such as pedestrian detection and 360-degree sensing. Previously, millimeter-wave (mmWave) sensors that implemented these applications were discrete, that is, the transmitter, receiver, and processing components were separate units, which made the millimeter-wave sensor design process complex and the volume of the entire solution. Huge and cumbersome. This article refers to the address: http:// Compared to traditional silicon germanium (SiGe) based sensor technology, TI's RFCMOS-based radar sensor introduces higher digital and analog integration for high output power, low power consumption (50% lower than existing solutions on the market) And low phase noise to provide users with a safer and more advanced driving experience with high precision and ultra high resolution sensing capabilities. With three devices in the TI mmWave sensor portfolio, the AWR1243, AWR1443, and AWR1642 sensors, developers can choose the best device for their design. The AWR1x sensor operates in the 76 - 81 GHz band and uses Frequency Modulated Continuous Wave (FMCW) with the following features: • Phase-locked loop (PLL) for linear and high-precision frequency modulation to help improve range accuracy. • Ability to cover the entire 4 GHz FM bandwidth to detect objects within 5 cm. • A sophisticated receiver architecture that enables jamming or non-human interference in dense sensor environments. • Intelligent self-monitoring system that can self-calibrate over the entire voltage and temperature range. Long and medium distance sensing applications Imagine that when driving a car with automatic cruise control at high speed, if there is any obstacle near the car at a certain distance or curve, the millimeter wave sensor can detect the obstacle within a few milliseconds. The central intelligence system then warns the driver of possible hazards within 100 milliseconds and alerts the driver to take the necessary action. As shown in Figure 1, the AWR1243 mmWave is a radar front-end sensor with 3 transmitters and 4 receiver antennas. This device is targeted at long-range and medium-range radar applications such as ACC and Automatic Emergency Brake (AEB) for autonomous driving. Also available are CSI-2/Signal LVDS, I2C and SPI. The single-chip millimeter-wave integrated circuit (MMIC) also features a built-in calibration and monitoring engine and can be coupled to an external processor such as the TI TDA3 processor. Cascading multiple AWR1243 sensors makes it easy to achieve longer distances and better angular resolution in applications such as imaging radars for automated highway driving. Figure 1: AWR1243 millimeter wave transceiver, field of view and field of view capability Short-range application According to data from the Eno Traffic Center, about 90% of car accidents are caused by human error, many of which are caused by the driver's lack of concentration. Cameras, 24 GHz radar and ultrasonic sensors currently available on the market can solve these problems, but these products may not be the best choice. That's where TI's 77GHz single-chip digital signal processor (DSP) integration solution can make a big difference. Our millimeter-wave sensors can operate in any environmental conditions, such as day, night, snow, rain, fog, and dusty weather, and provide high-precision measurements at low power in small form factors. Compared to 24GHz sensors, the TI AWR1642 sensor offers the following features: ·The size is reduced by 33% ·Power consumption reduced by 50% · Range accuracy is increased by more than 10 times ·The overall solution cost is lower As shown in Figure 2, the AWR1642 is a high-end single-chip millimeter-wave sensor with 2 transmit and 4 receive antennas for short- and ultra-short-range applications such as blind spot detection, lane change assistance, crossroad traffic alerts and vehicles. Start and stop control, etc. It features CAN, CAN FD and SPI interfaces, as well as 1.5MB of on-chip memory, and an ARM® Cortex®-R4F and TI C674x DSP for data processing. The raw data collected from the field can be fed back to the sensor through the HIL interface for data analysis and algorithm development. The cryptographic accelerator encrypts the target/original data sent to the engine control unit via the CAN/CAN FD interface. The ARM Cortex-R4F runs the automotive open system architecture (AUTOSAR), clustering and tracking algorithms. For signal processing-intensive applications such as Fast Fourier Transform (FFT) and object detection, the C674x DSP can perform fixed-point and floating-point operations to increase processing efficiency. Figure 2: AWR1642 single-chip sensor, field of view and field of view capability Ultra short range application Proximity sensing applications such as parking assistance, occupant detection, door/trunk opening devices, and simple gesture movements are becoming an important component in current and future vehicle designs. The AWR1443 is a 77 to 81 GHz highly integrated radar device for this type of application. The AWR1443 device shown in Figure 3 below includes a full millimeter-wave RF portion for three transmit and four receive antennas, as well as an analog signal chain, and includes a user-programmable ARM Cortex R4F with 0.5MB of on-chip memory for front-end Run autonomously. Figure 3: AWR1443 single-chip sensor Open today In order to enable you to immediately develop a radar solution, TI offers evaluation modules (EVM), reference schematics, PCB design files and BOM for all three devices (AWR1243, AWR1443, AWR1642), enabling you to be in a short time. Built your own board inside. In addition, TI offers mmWaveSDK, a software development kit consisting of a driver, operating system (OS) abstraction layer, reference algorithm library, firmware, APIs, utilities, and demos. These libraries make control and monitoring of the RF front-end subsystem easier, and these drivers provide external communication through standard peripherals. The mmWave Studio tool helps developers configure RF front-ends with system-level parameters such as frequency and system profiles, start and stop frequencies, and more, and analyze RF performance. By leveraging TI's Software and System Development Kit (SDK), developers can evaluate and implement a sensor project in less than 30 minutes. Dot Matrix Led Display,Round Dot Matrix Led Display,5X7 Dot Matrix Led Display,1.2 Inch 5X7 Dot Matrix Display Wuxi Ark Technology Electronic Co.,Ltd. , https://www.arkledcn.com
