Ⅰ Requirements
Taking an elevator in a high-rise building in a big city, the following situations can happen: (1) Someone on certain floors presses the elevator, but then suddenly leaves for something else, causing the elevator to stay, which is very common in life. (2) It is also common in life that the elevator is already packed with people but still stays on the floor where someone pressed the elevator but can no longer carry anyone else. (3) Some high-rise buildings will exist 4 to 6 elevator devices, multiple button operation, will lead to the existence of multiple elevators to the same floor, but at this time the passengers have been carrying the first to arrive at the elevator to leave, after arriving at the elevator belongs to an empty trip. (4) Some people will press the wrong elevator but will not cancel it in time, but the elevator will still lift to the wrong floor after stopping at the right floor, which is more common when going up the stairs. Although the current elevator is smart enough, it has not completely solved the above problems, as well as other problems that the blogger has not thought of. Ⅱ Solution It just occurred to me that millimeter-wave radar for human detection has been studied for more than 10 years, especially in the last 5 years the outbreak of a large number of human presence detection radar, multi-target tracking and head counting radar, etc., their costs have been very low. If the characteristics of millimeter wave radar can be used, it should be able to solve the problem of elevator intelligent linkage to a certain extent: (1) If the elevator is already stuffed with people, it will only go down but not up; (2) If there is no one outside the elevator door, then don't stay; (3) If there is no one inside the elevator, then keep silent. This not only saves electricity, but also accelerates the passengers' riding experience, so that they will not be annoyed because the elevator is always doing some useless work, especially during the peak period of commuting. Ⅲ Implementation Program (1) Install a headcount radar inside the elevator, which requires high-resolution radar. Do better with cameras. (2) Each floor to install a low-cost human presence detection radar can be, 24GHz radar sensor can be, after all, a lot of floors, the deployment of the cost is very high. (3) Finally, link the data from the radar with the elevator control system, while ensuring the stability of the system and the correct functionality of the system can be.
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