Elevator safety monitoring and pre-warning system

[0028] like figure 1 and figure 2 As shown, the present invention includes an elevator safety monitoring box 2 installed above the outside of the elevator hall door 1 and an elevator safety publicity box 3 installed on the outside of the elevator hall door 1. The top of the elevator safety monitoring box 2 is installed with a The universal pan/tilt 4 is installed with a CMOS camera 5 for real-time acquisition of the image in front of the elevator hall door 1, and the elevator safety publicity box 3 is provided with an MP3 player that internally stores elevator safety publicity knowledge The amplifier 6 and the loudspeaker 7 connected with the audio signal output end of the MP3 player 6, and the power adapter 8 for supplying power to the MP3 player 6 and the loudspeaker 7, the power adapter 8 is in phase with the mains 9 Then, the outer surface of the elevator safety publicity box 3 is provided with a grid 10 for the sound played by the loudspeaker 7; the elevator safety monitoring box 2 is provided with an elevator safety monitoring circuit board, and the elevator safety monitoring An elevator safety monitoring circuit is integrated on the monitoring circuit board, and the elevator safety monitoring circuit includes a DSP digital signal processor 11 and a power supply battery 12 for supplying power to each power module in the elevator safety monitoring circuit, and the DSP digital signal processor. 11 connected crystal oscillator circuit 13, reset circuit 14 and Flash data memory 15, the output end of the CMOS camera 5 is connected to the input end of the DSP digital signal processor 11, and the input end of the DSP digital signal processor 11 is also A clock circuit module 16 and an ultrasonic ranging sensor 17 installed on the wall facing the elevator hall door 1 in the elevator roadway and used for detecting the distance between the wall and its front end obstacle, the obstacle being the elevator car are connected with the clock circuit module 16. , the elevator hall door 1 or the passenger in front of the elevator hall door 1, the output end of the DSP digital signal processor 11 is connected with a buzzer alarm circuit 18, an LED flash 19 and a power supply for the MP3 player 6 connected in series with the power adapter 8 The relay 20 in the power supply circuit and the LED flashing light 19 are exposed on the outer surface of the elevator safety monitoring box 2 .

[0029] In this embodiment, the DSP digital signal processor 11 is a DSP digital signal processor chip TMS320F28335. The flash data memory 15 is a flash data memory chip AM29LV400B. The clock circuit module 16 is mainly composed of a clock chip DS1302. The model of the ultrasonic ranging sensor 17 is US-100. The LED flash 19 is a red LED flash.

[0030] The working process of the present invention is as follows: the CMOS camera 5 collects the image in front of the elevator hall door 1 in real time and outputs the collected image to the DSP digital signal processor 11 in real time. The signal processor 11 controls the relay 20 to turn on, the power adapter 8 starts to supply power to the MP3 player 6, and the MP3 player 6 starts to play the elevator safety propaganda knowledge stored in the interior and transmits it through the grid 10 after amplifying the sound through the loudspeaker 7, For passengers to learn; at the same time, the ultrasonic ranging sensor 17 detects the distance between the wall and the obstacle in front of it and outputs the detected distance information to the DSP digital signal processor 11 in real time, and the DSP digital signal processor 11 receives the received distance information. The detection distance is the distance S1 between the pre-stored elevator car rising to the elevator hall door 1 and the wall facing the elevator hall door 1 in the elevator roadway S1, the inner surface of the elevator hall door 1 facing the elevator hallway Compare the distance S2 between the walls of the elevator hall door 1. When the difference between the detection distance and the distance S1 is very small, it means that the elevator car has risen to the elevator hall door 1. When the detection distance is greater than the distance S2, it means that the elevator car has not Ascending to the elevator hall door 1 and the elevator hall door 1 has been opened, the DSP digital signal processor 11 controls the buzzer alarm circuit 18 to issue a sound alarm signal, and at the same time, the DSP digital signal processor 11 controls the LED flash 19 to issue a flashing alarm signal. Remind passengers to pay attention.

[0031] The above are only preferred embodiments of the present invention and do not limit the present invention. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technology of the present invention. within the scope of the program.