The current era is an intelligent era. It is estimated that by 2020 will be driven on the road; within the next five years, 56% will be improved in efficiency; 2020, will also be achieved by 81% of families and buildings. Intelligent.
In this context, the sensing demand will be further enhanced, such as increasing the distance, speed, and angle of the detection object; adapting to environmental conditions such as rain, fog, dust, light and darkness; materials such as plastic, dry walls, glass. At present, millimeter waves are the only sensational technology that can meet all of these needs. This is also the reason why the industry is interested in millimeter waves.
However, there are many shortcomings in today's multi-chip millimeter wave sensor solutions. These challenges include accuracy, size, power consumption, listing time, and complex design.
Recently, at the microwave radio frequency seminar, Texas Instrument (TI) China Embedded Product System and Application Director Jiang Hong brought us "Ti 77GHz millimeter wavele-chip solution in automobiles and industrial applications" Keynote Speech. He said that TI has now launched a new millimeter wave bulk chip solution. He also pointed out that laser radar is now very popular now, but now there is a sound that can replace the laser radar in the way with multiple millimeter waves? - millimeter wavelets are very good for objects in the object, and the performance is also very good in adapting to various weather conditions, and the cost is very low. At the same time, because it is a single-chip, the entire cost can be lowered, so it can achieve great improvement throughout the cost performance.
According to reports, Ti's single-chip CMOS millimeter wave program has experienced 7 years from R & D to the launch; now the product size is only 10.4mm × 10.4mm, claiming is extremely accurate and extremely small millimeters of millimeters in the world. 76-81GHz sensor . "The single chip we launched now is probably like referring to the finger cover (the size of the antenna is 1/4 of the wavelength, so 77GHz radar can be smaller than 24GHz). Based on the 77GHz band, we can do very well in many fields. Many applications include cars, industrial. Jiang Chiang said. At the same time, he revealed that next year TI will also introduce the product of the integrated antenna.
TI single-chip CMOS millimeter wave scheme is divided into two systems AWR and IWR. A represents Automotive (car), i represents INDUSTRIAL. AWR is divided into 12xx, 14xx, 16xx, IWR is divided into 14xx and 16xx. The back of the two digits represents the number of empty antennas, such as AWR1243 represents 3 hair 4. "We use FMCW (FMW continuous wave) to do waveform emission and reception." Jiang always said.
Let's take a molter wave radar. Among them, AWR1243 is suitable for medium and long-range radar, which can be used for emergency braking, adaptive cruise control and high-speed automatic driving.
In contrast, MCUs are integrated in AWR1443, suitable for approximate sensing, such as for occupant detection, body sensors, driving indoor gesture identification and driver monitoring.
AWR1642 is an additional DSP in it, suitable for minor and short-range radar, such as blind spot detection, anti-rear collision / warning, lane change assist, pedestrian / bicycle detection, anti-collision, intersection traffic alert, 360-degree perspective and parking assist .
In addition, for driverless cars, their traveling scenes are switched from the highway to the low-speed intensive area, so the entire detection scenario should continue to switch. This requires dynamic multi-mode operation support. And AWR12XX, 14XX, 16XX can be fully covered from it remotely to close distances.
From the figure below, the difference between the three series millimeter waves is clear.
"The car is constantly evolving, like detecting the driver's heartbeat breathing, this has never thought about it. Now there is a lot of owners to face demand in this area. We used to say that the number of passengers in the car is very important, but now Heartbeat also to detect. "Jiang always emphasized.
In addition, the industrial millimeter wave radar is again. The smart sensor is now talking now. If the millimeter wavelet is applied to the drone, the radar is currently the best and only the technology that can discover high-voltage lines. Non-contact vibration detection like industries, millimeter wave radar can reach very high detection accuracy, especially the distance from equipment distance. In addition, for smart homes, relative to the camera, radar will not bring concerns about privacy. There is also liquid level monitoring (such as gasoline diesel buried in the ground), which is a very good thing for millimeter waves in the industrial field. In addition, there are ready-made applications like fork, robot, train monitoring, etc.
[CAPTION ID = "attachment_240772" align = "aligncenter" width = "500"] Radar detection Heartbeat and breathing demonstration [/ caption]
Original link: https://www.eeboard.com/news/leida/
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