CN107954291A - Detection system for presence of people in elevator car - Google Patents

Abstract

The invention discloses a detection system for detecting whether a person exists in an elevator car, which comprises a lifting driving mechanism and a car, wherein the lifting driving mechanism and the car are arranged in an elevator shaft, the lifting driving mechanism is fixedly connected with the car, the lifting driving mechanism comprises a main driving device and a deflection pulley, the main driving device and the deflection pulley are arranged in the elevator shaft, a main cable is wound on the main driving device and the deflection pulley, the car is suspended at one end of the main cable, and a balancing weight is suspended at the other end of the main cable; be provided with infrared thermal imager group in the car, infrared thermal imager group is including setting up four infrared thermal imagers in elevator car ceiling four corners respectively. The elevator car monitoring system can analyze and judge whether passengers exist in the elevator car in emergency power failure, is not influenced by light, can perform thermal imaging on the passengers when no light exists in the elevator car, and further can perform timely alarming and rescuing by comparing with thermal imaging under no-load.

Description

A detection system for the presence or absence of personnel in the elevator car

Technical field:

The invention relates to the technical field of elevator detection, in particular to a detection system for the presence or absence of personnel in an elevator car.

Background technique:

With the development of society, elevators are increasingly important as a means of transportation for upper and lower floors in high-rise buildings. In order to monitor various emergencies of passengers in the car, some kind of passenger monitoring mechanism needs to be installed in the moving car for real-time monitoring of passenger information and elevator real-time status information (including floors, elevator door switch status, running Direction, etc.), can provide users at all levels with more intuitive, clear, accurate and stable elevator operation status monitoring, and provide various possibilities for equipment maintenance and fault diagnosis.

A general monitoring mechanism often installs a monitoring camera fixedly on the ceiling of the car, and monitors the conditions in the car based on the image data captured by the monitoring camera. On the one hand, when the monitoring camera is fixedly installed in the car, there will be many dead spots, and it is difficult for the monitor to reliably grasp the situation in the car. Reduce blind spots, but passengers will feel embarrassed by being stared at by the surveillance camera; on the other hand, once the lighting system in the elevator car fails, the surveillance camera will not be able to take pictures, and the monitor will not be able to judge whether there are passengers in the car , whether emergency action should be performed.

Invention content:

The object of the present invention is to provide a detection system for the presence or absence of personnel in the elevator car, aiming at the deficiencies of the prior art.

Technical solutions of the present invention are as follows:

A detection system for the presence or absence of people in an elevator car, which includes a lifting drive mechanism and a car arranged in an elevator shaft. The lifting drive mechanism is fixedly connected with the car. The guide wheel, the main driving device and the partial guide wheel are wound with a main cable. One end of the main cable is suspended with a car, and the other end is suspended with a counterweight; The instrument group includes four infrared thermal imaging cameras respectively installed at the four corners of the elevator car ceiling; the upper part of the elevator car is also equipped with an image processing unit, an analysis unit and a control system, among which the four infrared thermal imaging cameras are electrically connected to the image processing unit , the analysis unit is electrically connected to the image processing unit and the control system, and the control system is further electrically connected to the alarm in the monitoring room; the four infrared thermal imagers perform real-time thermal imaging of the elevator car, and the image processing unit accepts thermal imaging and Perform zoom-in processing, the analysis unit pre-stores the thermal image of the elevator car under no load, compares the real-time thermal image with the thermal image under no load, analyzes and judges whether there are passengers in the car, and the control system receives the analysis unit The judging information is used to control the lifting drive mechanism and transmit the information to the alarm in the monitoring room.

The car includes a car wall, the car wall is made of stainless steel, and its lowermost end is provided with an emergency fall buffer. The emergency fall buffer includes a speed detector and a fall buffer assembly. The fall buffer assembly includes a primary buffer, a secondary buffer The first-level buffer and the second-level buffer respectively include a cylinder body that is cylindrical and used to fill the buffer medium. A cylinder cover is sealed at the open end of the cylinder body, and the center through hole of the cylinder cover is sealed and movable. There is a piston rod, and the right end of the piston rod is provided with a piston body assembly for adjusting the reciprocating flow of the medium. The piston body assembly is suitable for piston movement in the cylinder body, and is movable and sealed with the inner wall of the cylinder body; among them, the primary buffer The cylinder of the shock absorber constitutes the piston rod assembly of the secondary shock absorber.

One side of the car is provided with an elevator door, and the lower part of the car is provided with a load detection assembly, and the load detection assembly includes a plurality of pressure sensors arranged on the bottom of the car.

A position sensor is arranged on the outer wall of the car, and the position sensor is electrically connected with the control system for sensing the lift position of the car.

A car buffer mechanism is arranged directly below the car, and the car buffer mechanism is arranged at the pit bottom of the elevator shaft.

A counterweight buffer mechanism is arranged directly below the counterweight, and the counterweight buffer mechanism is arranged at the pit bottom of the elevator shaft.

The main driving device is a winch, including driving parts and driving wheels.

The beneficial effect of the present invention is that: the present invention can analyze and judge whether there are passengers in the elevator car with emergency power off, it is not affected by the quality of the light, and can perform thermal imaging on the passengers when there is no light in the elevator car , and then compared with the thermal imaging under no-load, timely alarm and rescue.

Description of drawings:

Fig. 1 is a structural representation of the present invention;

Figure 2 is an electrical connection diagram of the detection system;

Fig. 3 is a working principle diagram of the present invention.

Detailed ways:

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1-3, a detection system for the presence or absence of personnel in an elevator car includes a lifting drive mechanism and a car 10 arranged in the elevator shaft. The lifting drive mechanism is fixedly connected to the car 10. The lifting drive mechanism includes The main driving device 13 and the deflecting pulley 14 arranged in the elevator shaft, the main driving device 13 and the deflecting pulley 14 are wound with a main cable, the car 10 is suspended at one end of the main cable, and the counterweight is suspended at the other end 15; the car 10 is provided with an infrared thermal imager group 11, and the infrared thermal imager group 11 includes four infrared thermal imagers respectively arranged on the four corners of the elevator car ceiling; the upper part of the elevator car is also provided with an image processing unit 21, The analysis unit 23 and the control system 20, wherein the four infrared thermal imagers are all electrically connected to the image processing unit 21, the analysis unit 23 is electrically connected to the image processing unit 21 and the control system 20 respectively, and the control system 20 is further connected to the monitoring room 30. The alarm 31 is electrically connected; four infrared thermal imagers perform real-time thermal imaging of the elevator car, the image processing unit 21 accepts the thermal imaging and performs amplification processing, and the analysis unit 23 pre-stores the thermal image of the elevator car under no load , and compare the real-time thermal image with the thermal image under no-load, analyze and judge whether there are passengers in the car, the control system 20 receives the judgment information of the analysis unit 23 to control the lifting drive mechanism, and transmits the information to An alarm 31 in the monitoring room 30 .

Car 10 comprises car wall, and car wall is made of stainless steel, and its lowermost end is provided with emergency fall buffer, and emergency fall buffer includes speed detector and fall buffer assembly, and fall buffer assembly includes primary buffer, secondary The buffer, the primary buffer, and the secondary buffer respectively include a cylinder body that is cylindrical and is used to fill the buffer medium. A cylinder cover is sealed at the open end of the cylinder body, and the sealing activity is carried out in the central through hole of the cylinder cover. There is a piston rod, and the right end of the piston rod is provided with a piston body assembly for adjusting the back and forth flow of the medium. The piston body assembly is suitable for piston movement in the cylinder body, and is movable and sealed with the inner wall of the cylinder body; among them, the first stage The cylinder of the shock absorber forms the piston rod assembly of the secondary shock absorber.

One side of the car 10 is provided with an elevator door, and the lower part of the car 10 is provided with a load detection assembly 12, and the load detection assembly 12 includes a plurality of pressure sensors arranged on the bottom of the car.

A position sensor is arranged on the outer wall of the car 10 , and the position sensor is electrically connected with the control system 20 for sensing the lifting position of the car 10 .

Just below the car 10 is provided with a car buffer mechanism, and the car buffer mechanism is arranged at the pit bottom of the elevator shaft.

Just below the counterweight 15 is provided with a counterweight buffer mechanism, and the counterweight buffer mechanism is arranged at the pit bottom of the elevator shaft.

The main driving device 13 is a winch, including driving parts and driving wheels.

Working principle: An infrared thermal imager is installed on the ceiling of the elevator car, and the infrared thermal imager performs real-time thermal imaging of the situation inside the car, and transmits the captured thermal image to the image processing unit, which further transmits the image to Analysis unit, the analysis unit compares the transmitted thermal image with its pre-stored thermal image under no-load, analyzes and judges whether there are passengers in the car, and then transmits the information to the control system. The information controls the lifting drive mechanism and controls the alarm to alarm, and the staff in the monitoring room carry out emergency rescue according to the alarm signal of the alarm.

The examples are used to illustrate the present invention, but not to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be listed in the claims of the present invention.

Claims (7)

1. A detection system for the presence or absence of personnel in an elevator car is characterized in that: it comprises a lifting drive mechanism arranged in an elevator shaft, a car (10), the lifting drive mechanism is fixedly connected with the car (10), and the lifting drive The mechanism includes a main driving device (13) and a deflecting wheel (14) arranged in the elevator shaft. The main driving device (13) and the deflecting wheel (14) are wound with a main cable, and a car is suspended at one end of the main cable. (10), the other end is suspended with a counterweight (15); the car (10) is provided with an infrared thermal imager group (11), and the infrared thermal imager group (11) includes four corners of the elevator car ceiling. Four infrared thermal imagers; the top of the elevator car is also provided with an image processing unit (21), an analysis unit (23) and a control system (20), wherein the four infrared thermal imagers are all connected to the image processing unit (21) connected, the analysis unit (23) is electrically connected with the image processing unit (21) and the control system (20) respectively, and the control system (20) is further electrically connected with the alarm (31) in the monitoring room (30); four infrared thermal The imager performs real-time thermal imaging of the elevator car, the image processing unit (21) accepts the thermal imaging and performs amplifying processing, and the analysis unit (23) pre-stores the thermal image of the elevator car under no load, and converts the thermal image in real time. The image is compared with the thermal image under no-load to analyze and judge whether there are passengers in the car, and the control system (20) receives the judgment information of the analysis unit (23) to control the lifting drive mechanism, and transmits the information to the monitoring room Alarm (31) in (30). 2. The detection system for the presence or absence of personnel in a kind of elevator car according to claim 1, characterized in that: the car (10) comprises a car wall, and the car wall is made of stainless steel, and the lowermost end is provided with an emergency The fall buffer, the emergency fall buffer includes a speed detector and a fall buffer assembly, the fall buffer assembly includes a primary buffer, a secondary buffer, the primary buffer, and the secondary buffer are respectively cylindrical and used for filling The cylinder body of the buffer medium is sealed with a cylinder head at the opening end of the cylinder body, and a piston rod is fitted in the central through hole of the cylinder head for sealing and movable movement. The right end of the piston rod is provided with a piston body assembly for adjusting the back and forth flow of the medium. The piston body assembly is suitable for piston movement in the cylinder body, and is movable and sealed with the inner wall of the cylinder body; wherein, the cylinder body of the first-stage buffer constitutes the piston rod assembly of the second-stage buffer. 3. The detection system for the presence or absence of personnel in a kind of elevator car according to claim 1, characterized in that: one side of the car (10) is provided with an elevator door, and the lower part of the car (10) is provided with a load detection system. Assembly (12), load detection assembly (12) includes a plurality of pressure sensors arranged on the bottom of the car. 4. The detection system for the presence or absence of personnel in a kind of elevator car according to claim 1, characterized in that: a position sensor is arranged on the outer wall of the car (10), and the position sensor is electrically connected with the control system (20) , for sensing the lifting position of the car (10). 5. The detection system for the presence or absence of personnel in a kind of elevator car according to claim 1, characterized in that: a car buffer mechanism is arranged directly below the car (10), and the car buffer mechanism is arranged at the bottom of the elevator shaft. pit bottom. 6. The detection system for the presence or absence of personnel in a kind of elevator car according to claim 1, characterized in that: a counterweight buffer mechanism is arranged directly below the counterweight (15), and the counterweight buffer mechanism is arranged on The bottom of the elevator shaft. 7. A detection system for the presence or absence of persons in an elevator car according to claim 1, characterized in that: the main drive device (13) is a winch, including drive components and drive wheels.