Human body detection device capable of improving safety for elevator car

Abstract

The invention relates to the technical field related to elevator car safety, and discloses a human body detection device capable of improving safety for an elevator car, which comprises a sensor bracket, a sensor shell and a functional module mounted in the sensor shell, the function module comprises an infrared sensor, a laser sensor, an image acquisition module, a data processing unit and a communication unit, and the communication unit supports CAN communication and RS485 communication. According to the elevator car human body detection device capable of improving the safety, through interaction and cooperation of sensors in the function module, the personnel state can be achieved, specific crowds such as children and old people can be accurately recognized, the abnormal state can be captured in time, a human body feature recognition unit in the function module is matched with a data processing unit, and the safety is improved. The elevator door opening and closing information can be linked, whether people are passively trapped in the elevator car or not is accurately judged, the abnormal state is fed back, automatic alarm is triggered, and afterward protection is changed into active prevention and control.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elevator car safety, in particular to a human body detection device for an elevator car capable of improving safety. BACKGROUND

[0002] Elevators are widely used, and the elevator car, a box-shaped space used to carry and transport personnel and goods, is increasingly valued for its safety performance. In special situations such as schools, hospitals, nursing homes, and high-end hotels, real-time, accuracy, and convenience of elevator safety are required to a higher degree.

[0003] For example, as disclosed in the publication number CN212608914U, a stable connection elevator car safety protection device is disclosed, which includes an elevator frame and a second sliding rail. The elevator frame is fixed with an elevator car, and the outer side of the elevator frame is provided with a connecting rod. The connecting rod is symmetrically provided with four connecting rods. The bottom end of the elevator frame is provided with a first sliding rail. The inside of the elevator frame is provided with a fixed pulley. The upper end of the elevator frame is provided with a lifting rope. The stable connection elevator car safety protection device is provided with a first spring. When the rope is loosened, the supporting rod moves outward under the elastic force of the first spring. The brake pad connected with the supporting rod moves out at the same time. The brake pad is in contact with the sliding groove, and the elevator frame is stopped and moved. When the elevator frame falls, the bottom plate touches the ground, and the second spring is pressed by the elevator frame to buffer the elevator frame. When the elevator fails, the protection of the personnel in the elevator car is ensured, and the safety protection of the elevator car is realized.

[0004] For example, as disclosed in the publication number CN218114719U, an elevator car safety protection device is disclosed, which includes a car base and a car body. The car body is installed on the outermost upper end of the car base. A falling buffer protection device is arranged on the upper end of the car base and inside the lower end of the car body. When the elevator car safety protection device is normally used, the falling buffer protection device can replace the car base to stand. When the elevator fails and the elevator car falls rapidly, the falling buffer protection device can protect the passengers standing in the elevator car. When the elevator falls to a lower floor, a great impact force is generated when the elevator directly falls to the bottom of the elevator shaft. At this time, the falling buffer protection device can effectively offset and weaken the impact force generated by the falling.

[0005] However, the existing human body detection device for an elevator car capable of improving safety still has the following shortcomings:

[0006] Existing elevator cars rely heavily on safety brakes, buffers, and speed governors for safety protection. These systems are notoriously slow to activate, only responding after a safety incident has occurred, which can lead to a poor riding experience or even personal injury for passengers. Furthermore, the lack of targeted safety detection measures creates blind spots, making it difficult to monitor the status of people and the safety of the environment inside the car in real time. In addition, the installation of some image recognition and human detection equipment requires disassembling the existing car, which is complex and affects the normal use of the elevator. It is also difficult to accurately identify specific groups such as children and the elderly, as well as abnormal conditions such as falls.

[0007] For example, the comparative patents listed above have this problem.

[0008] Therefore, we propose a human body detection device for elevator cars that can improve safety in order to solve the problems mentioned above. Summary of the Invention

[0009] The purpose of this invention is to provide a human body detection device for elevator cars that can improve safety, in order to solve the problems mentioned in the background art. The safety protection relies mainly on components such as safety clamps, buffers, and speed governors. Such protection has obvious lag, only activating after a safety incident occurs, which can easily lead to a poor elevator experience for passengers or even personal injury. It also lacks targeted safety detection measures, is in a detection blind spot, and is inconvenient to monitor the status of people and environmental safety in the car in real time. Moreover, the installation of some image recognition and human body detection equipment requires disassembling the existing car, which is complicated and affects the normal use of the elevator. It is also difficult to accurately identify specific groups such as children and the elderly, as well as abnormal states such as falls.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a human body detection device for elevator cars that can improve safety, comprising a sensor bracket, a sensor housing, and a functional module installed in the sensor housing;

[0011] Also includes:

[0012] From top to bottom, the sensor bracket and the sensor housing consist of a height adjustment component that moves the sensor housing up and down, an angle adjustment component that rotates the sensor housing, a shock-absorbing and buffering component that absorbs vibrations from elevator operation, and a fixing component that is used for installation and removal.

[0013] The sensor housing, together with the functional modules, forms a detachable structure within the elevator car via a fixing component.

[0014] The functional modules include an infrared sensor, a laser sensor, an image acquisition module, a data processing unit, and a communication unit. The communication unit supports CAN communication and RS485 communication.

[0015] Preferably, the sensor bracket is fixed to the ceiling or side wall inside the elevator car by fastening bolts evenly distributed at the edge of the sensor bracket.

[0016] Preferably, the height adjustment assembly includes nested inner and outer connecting rods and a retaining bolt for locking and limiting.

[0017] Preferably, the connecting outer rod and the connecting inner rod form a telescopic structure, and the connecting inner rod is fixed to the lower end of the sensor bracket. At the same time, the connecting outer rod and the connecting inner rod are limited by a fixing bolt passing through the upper right end of the connecting outer rod.

[0018] Preferably, the angle adjustment assembly includes a support block fixed to the lower end of the connecting outer rod and a movable disk rotatably connected to the middle of the support block. The outer surface of the upper end of the movable disk is provided with a plurality of fixing holes for positioning at equal angles.

[0019] The support block and the movable plate are fixed together by a limiting component disposed inside the support block. The limiting component includes a spring disposed inside the support block, a movable pin connected to the movable end of the spring, and locking members disposed on the left and right sides of the movable pin.

[0020] Preferably, the movable pin is telescopically connected inside the support block, and the lower end of the movable pin is inserted into the fixing hole at the corresponding position.

[0021] Preferably, the locking component includes a locking rod fixed to the left and right sides of the movable pin, a locking cap threaded to the outside of the locking rod, and a retaining ring fixed to the side of the locking rod away from the movable pin;

[0022] The locking rods pass through the left and right ends of the support block, and the locking rods and the support block form an up-and-down sliding structure. Locking caps are tightly fitted on both the left and right sides of the support block.

[0023] Preferably, the shock-absorbing and buffering assembly includes an inverted T-shaped rod fixed to the lower end of the movable plate, a buffer sleeve sleeved on the lower end of the inverted T-shaped rod, and a first buffer rubber ring and a second buffer rubber ring disposed inside the buffer sleeve.

[0024] The first buffer rubber ring abuts against the lower end of the inverted T-shaped rod and the upper and lower ends of the buffer sleeve, respectively, while the second buffer rubber ring abuts against the outer side of the lower end of the inverted T-shaped rod and the middle part of the inner wall of the buffer sleeve.

[0025] Preferably, the fixing assembly includes a mounting rod fixed to the middle of the upper end of the sensor housing, an irregularly shaped limiting block fixed to the upper end of the mounting rod, a mounting post fixed to the lower end of the buffer sleeve, a limiting groove opened at the lower end of the mounting post and adapted to the irregularly shaped limiting block, and a mounting sleeve sleeved on the outer surface of the mounting post.

[0026] The outer side of the mounting sleeve is provided with anti-slip grooves.

[0027] Preferably, the mounting rod drives the irregularly shaped limiting block to engage in the limiting groove, and the mounting sleeve is rotatably connected to the lower end of the mounting column;

[0028] Meanwhile, the mounting rod passes through the middle of the mounting sleeve, and is threaded to the opening at the lower end of the mounting sleeve.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: This human body detection device for elevator cars, which can improve safety, can conveniently install and adjust the sensor housing and functional modules through the setting of fixing components, height adjustment components, and angle adjustment components. The device can be directly installed in the elevator car, and the later maintenance is relatively convenient. Through the shock-absorbing component, it can also absorb the vibration of elevator operation. Through the interaction and cooperation between the sensors inside the functional module, the status of personnel can be realized. It can accurately identify specific groups such as children and the elderly and promptly capture abnormal states. The human body feature recognition unit and the data processing unit in the functional module can work together to link the elevator door opening and closing information, accurately determine whether personnel are passively trapped in the car, feed back the abnormal state and trigger an automatic alarm, changing "post-event protection" to "proactive prevention and control".

[0030] 1. It is equipped with functional modules, including infrared sensors, laser sensors, image acquisition modules, data processing units, and communication units. Through the setting of functional modules, it has high precision and can accurately identify specific groups such as children and the elderly, promptly capture abnormal states, and feed back the abnormal states and trigger automatic alarms to improve safety.

[0031] 2. A height adjustment component is provided, which includes an inner connecting rod, an outer connecting rod, and a fixing bolt. The height adjustment component allows for corresponding adjustments to the installation and usage height of the functional module.

[0032] 3. An angle adjustment component is provided, which includes a support block and a movable plate. The movable plate rotates within the support block, thereby adjusting the operating angle of the functional module to achieve a more accurate detection effect.

[0033] 4. A shock-absorbing and buffering assembly is provided, which includes an inverted T-shaped rod, a buffer sleeve, a first buffer rubber ring, and a second buffer rubber ring. The shock-absorbing and buffering assembly can absorb the vibration of elevator operation, thereby ensuring the stable use of the sensor.

[0034] 5. It is equipped with a fixing component, including a fixing component mounting rod, irregularly shaped limiting block, mounting column, limiting groove and mounting sleeve. The fixing component allows for stable installation and removal of the sensor housing and functional modules, making subsequent maintenance operations more convenient. Attached Figure Description

[0035] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0036] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view;

[0038] Figure 3 This is a schematic diagram of the exploded structure of the present invention;

[0039] Figure 4 This is a front sectional view of the support block, movable disk, movable pin, and shock-absorbing buffer assembly of the present invention.

[0040] Figure 5 This is an exploded structural diagram of the mounting rod, irregularly shaped limiting block, mounting column, and mounting sleeve of the present invention;

[0041] Figure 6 An exploded view of the mounting column, limiting groove, and mounting sleeve of the present invention (bottom view).

[0042] Figure 7 This is a schematic diagram of the overall structure of the lifting and adjusting component of the present invention;

[0043] Figure 8 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0044] Figure 9 This is an exploded structural diagram of the support block, movable disk, and movable pin of the present invention;

[0045] Figure 10 This is an exploded structural diagram of the inverted T-shaped rod, buffer sleeve, first buffer rubber ring, and second buffer rubber ring of the present invention;

[0046] Figure 11 This is a schematic diagram of the overall structure for the angle flipping adjustment of the present invention.

[0047] In the diagram: 1. Sensor bracket; 2. Fastening bolt; 3. Sensor housing; 4. Functional module; 5. Mounting rod; 6. Irregularly shaped limiting block; 7. Mounting column; 8. Limiting groove; 9. Mounting sleeve; 10. Anti-slip groove; 11. Connecting inner rod; 12. Connecting outer rod; 13. Fixing bolt; 14. Support block; 15. Movable disc; 16. Fixing hole; 17. Spring; 18. Movable pin; 19. Locking rod; 20. Locking cap; 21. Fixing ring; 22. Inverted T-shaped rod; 23. Buffer sleeve; 24. First buffer rubber ring; 25. Second buffer rubber ring. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Please see Figures 1-11 The present invention provides the following technical solution:

[0050] To address the problems existing in the prior art, this invention provides a human body detection device for elevator cars that improves safety. The device comprises a sensor bracket 1, a sensor housing 3, and a functional module 4 installed within the sensor housing 3. From top to bottom, the sensor bracket 1 and sensor housing 3 consist of a height adjustment component for raising and lowering the sensor housing 3, an angle adjustment component for tilting the sensor housing 3, a shock-absorbing component for absorbing elevator vibrations, and a fixing component for installation and removal. The sensor housing 3, together with the functional module 4, forms a detachable structure within the elevator car via the fixing component. The functional module 4 includes an infrared sensor, a laser sensor, an image acquisition module, a data processing unit, and a communication unit. The communication unit supports CAN communication and RS485 communication.

[0051] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the sensor bracket 1 is first fixed to the ceiling or side wall inside the elevator car using fastening bolts 2. The fixing assembly includes a mounting rod 5 fixed to the middle of the upper end of the sensor housing 3, a shaped limiting block 6 fixed to the upper end of the mounting rod 5, a mounting column 7 fixed to the lower end of the buffer sleeve 23, a limiting groove 8 formed at the lower end of the mounting column 7 and adapted to the shaped limiting block 6, and a mounting sleeve 9 fitted onto the outer surface of the mounting column 7. The outer side of the mounting sleeve 9 is provided with an anti-slip groove 10. The sensor housing 3 is fixedly installed in the functional module 4, and the functional module... Block 4 drives the mounting rod 5 to be placed at the lower end of the mounting column 7, so that the irregularly shaped limiting block 6 is engaged in the limiting groove 8, improving the stability of the installation. At the same time, the mounting rod 5 is attached to the lower end of the mounting column 7. Then, the mounting sleeve 9 is rotated downwards, and the hand is in contact with the anti-slip groove 10 to achieve an anti-slip effect. The mounting rod 5 passes through the middle of the mounting sleeve 9, and the mounting rod 5 is threaded to the opening at the lower end of the mounting sleeve 9. Through the setting of the fixing components, it is easy to install the functional module 4 at the lower end of the mounting column 7. Moreover, the device can be disassembled and maintained later by reversing the above operation.

[0052] like Figure 4 , Figure 7 , Figure 8 , Figure 9 , Figure 11As shown, after installation, the height adjustment component, which includes nested inner connecting rods 11 and outer connecting rods 12, and a locking bolt 13, allows the outer connecting rod 12 to be pulled, enabling telescopic sliding between it and the inner connecting rod 11. This allows for the telescopic adjustment of the position and height of the sensor housing 3 and the functional module 4 according to usage requirements. After adjustment, the locking bolt 13 is rotated to limit the distance between the outer connecting rod 12 and the inner connecting rod 11. Then, the angle adjustment component, which includes a support block 14 fixed to the lower end of the outer connecting rod 12, is used. A movable disc 15 is rotatably connected to the middle of the support block 14. The outer surface of the upper end of the movable disc 15 has several fixing holes 16 at equal angles for positioning. The support block 14 and the movable disc 15 are fixed together by a limiting assembly inside the support block 14. The limiting assembly includes a spring 17 inside the support block 14, a movable pin 18 connected to the movable end of the spring 17, and locking members on the left and right sides of the movable pin 18. The locking members include locking rods 19 fixed to the left and right sides of the movable pin 18, locking caps 20 threaded to the outside of the locking rods 19, and locking members on the side of the locking rods 19 away from the movable pin 18. The fixed ring 21, when pulled upwards, causes the locking rod 19 to move upwards, allowing it to slide between the locking rod 19 and the support block 14. The locking rod 19 then causes the movable pin 18 to move upwards, extending and retracting within the middle of the support block 14. The movable pin 18 compresses the spring 17, causing it to elastically deform. The lower end of the movable pin 18 then moves out of the fixing hole 16, releasing the restriction between the support block 14 and the movable disk 15. The movable disk 15 then rotates within the support block 14, thereby driving the sensor housing 3 and the functional module 4. The angle is used for flipping adjustment. After the angle adjustment is completed, the fixing ring 21 is released directly. At this time, the spring 17 returns to its elastic deformation and pushes the movable pin 18 to move downward and insert into the fixing hole 16 at the corresponding position to limit the position between the support block 14 and the movable plate 15. Then, by rotating the locking cap 20 connected to the outer surface of the locking rod 19, the locking cap 20 fits tightly against the outer side of the support block 14, thereby locking and limiting the position between the locking rod 19 and the support block 14, preventing accidental contact of the fixing ring 21 and causing the movable pin 18 to loosen, and improving the stability between the support block 14 and the movable plate 15.

[0053] like Figure 1 , Figure 4 , Figure 10As shown, the shock-absorbing and buffering assembly includes an inverted T-shaped rod 22 fixed to the lower end of the movable plate 15, a buffer sleeve 23 sleeved on the lower end of the inverted T-shaped rod 22, and a first buffer rubber ring 24 and a second buffer rubber ring 25 disposed inside the buffer sleeve 23. The first buffer rubber ring 24 abuts against the lower end of the inverted T-shaped rod 22 and the upper and lower ends inside the buffer sleeve 23, respectively. The second buffer rubber ring 25 abuts against the outer side of the lower end of the inverted T-shaped rod 22 and the middle part of the inner wall of the buffer sleeve 23. When the elevator car vibrates during operation, the inverted T-shaped rod 22 moves in the buffer sleeve 23 and squeezes the buffer sleeve 23 or the first buffer rubber ring 24, causing the buffer sleeve 23 and the first buffer rubber ring 24 to deform, thereby absorbing the vibration in all directions during the operation of the elevator and maintaining the stable use of the sensors.

[0054] The sensor housing 3 houses a functional module 4, which includes an infrared sensor, a laser sensor, an image acquisition module, a data processing unit, and a communication unit. The communication unit supports CAN and RS485 communication. The coordinated use of the sensors is divided into the following three stages:

[0055] The first stage is the environmental and personnel information collection stage: infrared sensors detect the presence of human bodies in the car in real time with a response time of <100ms; laser sensors assist in collecting human feature data; image acquisition modules capture image information inside the car; and photosensors detect light intensity.

[0056] The second stage is the data processing and analysis stage: The data processing unit receives data transmitted from the infrared sensor, laser sensor, and image acquisition module. Using a new generation of image recognition algorithms, including light compensation algorithms, it analyzes the image data to identify the status of people, such as standing or falling, with a recognition rate of >95% and an image acquisition and judgment time of <300ms. At the same time, it combines infrared and laser data to identify specific groups such as children and the elderly.

[0057] The third stage is intelligent linkage and communication: The data processing unit transmits the analysis results to the elevator control system through the communication unit, which supports CAN and RS485 communication, with a communication accuracy of >99.8%; at the same time, it links the elevator door opening and closing information to determine whether people are passively trapped in the car. If any abnormality occurs, such as a person falling or being trapped, it promptly feeds back to the elevator control system and triggers automatic alarm and other response measures.

[0058] The contents not described in detail in this specification are existing technologies known to those skilled in the art. All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0059] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A human body detection device for elevator cars that can improve safety, comprising a sensor bracket (1), a sensor housing (3), and a functional module (4) installed in the sensor housing (3); Its features are, Also includes: The sensor bracket (1) and the sensor housing (3) are arranged from top to bottom as follows: a height adjustment component that drives the sensor housing (3) to rise and fall, an angle adjustment component that drives the sensor housing (3) to flip, a shock-absorbing buffer component for absorbing the vibration of the elevator operation, and a fixing component for installation and removal. Among them, the sensor housing (3) together with the functional module (4) form a disassembly structure in the elevator car through a fixing component; The functional module (4) includes an infrared sensor, a laser sensor, an image acquisition module, a data processing unit, and a communication unit. The communication unit supports CAN communication and RS485 communication.

2. The human body detection device for elevator cars that improves safety according to claim 1, characterized in that: The sensor bracket (1) is fixed to the ceiling or side wall inside the elevator car by fastening bolts (2) evenly distributed at the edge of the sensor bracket (1).

3. The human body detection device for elevator cars that improves safety according to claim 1, characterized in that: The height adjustment assembly includes an inner connecting rod (11) and an outer connecting rod (12) nested together, and a retaining bolt (13) for locking and limiting.

4. A human body detection device for elevator cars that improves safety according to claim 3, characterized in that: The connecting outer rod (12) and the connecting inner rod (11) form a telescopic structure, and the connecting inner rod (11) is fixed to the lower end of the sensor bracket (1). At the same time, the connecting outer rod (12) and the connecting inner rod (11) are limited by a fixing bolt (13) that passes through the upper right end of the connecting outer rod (12).

5. A human body detection device for elevator cars that improves safety according to claim 1, characterized in that: The angle adjustment assembly includes a support block (14) fixed to the lower end of the connecting outer rod (12) and a movable disk (15) rotatably connected to the middle of the support block (14). The outer surface of the upper end of the movable disk (15) is provided with a plurality of fixing holes (16) for positioning at equal angles. The support block (14) and the movable plate (15) are fixed together by a limiting component disposed inside the support block (14). The limiting component includes a spring (17) disposed inside the support block (14), a movable pin (18) connected to the movable end of the spring (17), and locking members disposed on the left and right sides of the movable pin (18).

6. A human body detection device for elevator cars that improves safety according to claim 5, characterized in that: The movable pin (18) is telescopically connected inside the support block (14), and the lower end of the movable pin (18) is inserted into the fixing hole (16) at the corresponding position.

7. A human body detection device for elevator cars that improves safety according to claim 5, characterized in that: The locking components include locking rods (19) fixed to the left and right sides of the movable pin (18), locking caps (20) threaded to the outside of the locking rods (19), and fixing rings (21) fixed to the side of the locking rods (19) away from the movable pin (18); The locking rod (19) passes through the left and right ends of the support block (14) respectively, and the locking rod (19) and the support block (14) form an up-and-down sliding structure. The left and right sides of the support block (14) are tightly fitted with locking caps (20).

8. A human body detection device for elevator cars that improves safety according to claim 1, characterized in that: The shock-absorbing and buffering assembly includes an inverted T-shaped rod (22) fixed to the lower end of the movable disc (15), a buffer sleeve (23) sleeved on the lower end of the inverted T-shaped rod (22), and a first buffer rubber ring (24) and a second buffer rubber ring (25) disposed inside the buffer sleeve (23); The first buffer ring (24) abuts against the lower end of the inverted T-shaped rod (22) and the upper and lower ends of the buffer sleeve (23), respectively, and the second buffer ring (25) abuts against the outer side of the lower end of the inverted T-shaped rod (22) and the middle part of the inner wall of the buffer sleeve (23).

9. A human body detection device for elevator cars that improves safety according to claim 1, characterized in that: The fixing assembly includes a mounting rod (5) fixed to the middle of the upper end of the sensor housing (3), a shaped limiting block (6) fixed to the upper end of the mounting rod (5), a mounting post (7) fixed to the lower end of the buffer sleeve (23), a limiting groove (8) opened at the lower end of the mounting post (7) and adapted to the shaped limiting block (6), and a mounting sleeve (9) sleeved on the outer surface of the mounting post (7); The outer side of the mounting sleeve (9) is provided with anti-slip grooves (10).

10. A human body detection device for elevator cars that improves safety according to claim 9, characterized in that: The mounting rod (5) drives the irregularly shaped limiting block (6) to engage in the limiting groove (8), and the mounting sleeve (9) is rotatably connected to the lower end of the mounting column (7); Meanwhile, the mounting rod (5) passes through the middle of the mounting sleeve (9), and the mounting rod (5) is threaded to the opening at the lower end of the mounting sleeve (9).

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