An elevator anti-pinch detection device, system, and method

Abstract

The application provides an elevator anti-pinch detection device, system and method, which comprises three first grooves arranged in sequence on the side of a first car door and three second grooves arranged in sequence on the side of a second car door; a first pressure sensor, a first reset mechanism and a first baffle are arranged in each first groove; a second pressure sensor, a second reset mechanism and a second baffle are arranged in sequence in the two side second grooves; in this way, when there is a linear object, the object is clamped by the non-middle groove, the pressure signal of the middle first pressure sensor becomes large, the problem that a linear object cannot be fixed or cannot be detected due to too small diameter is solved, and accidents are avoided.

Description

Technical Field

[0001] This invention relates to the field of elevator safety technology, and in particular to an elevator anti-pinch detection device, system and method. Background Technology

[0002] During elevator door closing, the inability to secure or detect thin, linear foreign objects can lead to situations where the elevator continues to move while the object is trapped, potentially causing accidents. For example, when passengers are riding elevators with pets on leashes, there's a possibility that the passenger may exit the elevator while the pet remains inside. If the elevator doors close and begin to move, the leash could become trapped and pull on both ends, posing a serious threat to passenger safety and property. Existing elevator door barriers push linear foreign objects to the other side, but if the object is not taut, it cannot be detected. Elevator light curtains, limited by their detection accuracy, may not be able to detect thin objects. Summary of the Invention

[0003] In view of the above problems, the present invention provides an elevator anti-pinch detection device, system and method, which aims to solve the problem in the prior art that when the elevator is closing, it cannot fix or detect thin linear foreign objects, resulting in the elevator starting to move while the foreign object is stuck, thus leading to an accident.

[0004] An elevator anti-pinch detection device is applied to an elevator car. The elevator car has a first car door and a second car door that open in opposite directions. The side of the first car door is provided with three first grooves arranged in sequence laterally. The side of the second car door is provided with three second grooves arranged in sequence laterally and corresponding one-to-one with the first grooves. The first grooves and the second grooves extend longitudinally.

[0005] The elevator anti-pinch detection device includes:

[0006] Each first groove is provided with a first pressure sensor, a first reset mechanism and a first baffle;

[0007] A second pressure sensor, a second reset mechanism, and a second baffle are disposed in and connected sequentially in the second grooves on both sides of the three second grooves;

[0008] The first baffle extends longitudinally through the first groove.

[0009] The second baffle extends longitudinally through the second groove.

[0010] When the first car door and the second car door are in the open state and both the first reset mechanism and the second reset mechanism are in the free state, the front end of the first baffle protrudes from the side of the first car door, and the front end of the second baffle protrudes from the side of the second car door.

[0011] Further, the first reset mechanism and the second reset mechanism are springs.

[0012] Further, the first pressure sensor is arranged at the bottom of the first groove, and the second pressure sensor is arranged at the bottom of the second groove.

[0013] Further, the first groove longitudinally penetrates the side edge of the first car door, and the second groove longitudinally penetrates the side edge of the second car door.

[0014] Further, the front end surface of the first baffle and the front end surface of the second baffle are sawtooth shapes.

[0015] An elevator anti-pinch detection system, comprising:

[0016] The elevator anti-pinch detection device as described above;

[0017] A data collection module connected to each of the first pressure sensors and the second pressure sensors, and configured to collect pressure signals of the first pressure sensors and the second pressure sensors;

[0018] A preprocessing module connected to the data collection module, and configured to process the collected pressure signals to form a level state sequence;

[0019] An abnormality determination module connected to the data collection module, and configured to determine whether there is foreign matter between the first car door and the second car door according to the level state sequence, and output a determination result;

[0020] A switch control module connected to the abnormality determination module, and configured to:

[0021] when the determination result indicates that there is no foreign matter, control the first car door and the second car door to be closed at a car door closing time;

[0022] when the determination result indicates that there is foreign matter, control the first car door and the second car door to be in an open state.

[0023] Further, the abnormality determination module is configured to:

[0024] when the level state sequence is a first level state sequence, output a determination result indicating that the first car door and the second car door are in an open state and there is no foreign matter between them, the first level state sequence being that the pressure signals of each of the first pressure sensors and the second pressure sensors are in a first level state;

[0025] when the level state sequence is the second level state sequence, outputting a result of judging that the first car door and the second car door are in a closed state and no foreign matter exists between the first car door and the second car door, the second level state sequence being that the pressure signal of the first pressure sensor in the first recess in the middle of the three first recesses is in a second level state, and the pressure signals of the first pressure sensors in the first recesses on the two sides of the three first recesses and the pressure signal of the second pressure sensor are in the second level state;

[0026] when the level state sequence is neither the first level state sequence nor the second level state sequence, outputting a result of judging that a foreign matter exists between the first car door and the second car door.

[0027] An elevator anti-pinch detection method using the elevator anti-pinch detection device as described above, comprising:

[0028] Step A1, collecting pressure signals of the first pressure sensors and the second pressure sensor;

[0029] Step A2, processing the collected pressure signals to form a level state sequence;

[0030] Step A3, judging whether a foreign matter exists between the first car door and the second car door according to the level state sequence:

[0031] if not, executing Step A3;

[0032] if yes, executing Step A4;

[0033] Step A3, controlling the first car door and the second car door to be closed at a closing time of the car door;

[0034] Step A4, controlling the first car door and the second car door to be in an open state.

[0035] Further, in Step A3:

[0036] when the level state sequence is the first level state sequence, judging that the first car door and the second car door are in an open state and no foreign matter exists between the first car door and the second car door, and continuing to execute Step A3;

[0037] when the level state sequence is the second level state sequence, judging that the first car door and the second car door are in a closed state and no foreign matter exists between the first car door and the second car door, and continuing to execute Step A3;

[0038] when the level state sequence is neither the first level state sequence nor the second level state sequence, judging that a foreign matter exists between the first car door and the second car door;

[0039] wherein the first level state sequence is that the pressure signals of each of the first pressure sensors and the second pressure sensor are in a first level state;

[0040] The second level state sequence refers to the pressure signal of the first pressure sensor in the first groove in the middle being the second level state, and the pressure signal of the first pressure sensor in the two side grooves and the pressure signal of the second pressure sensor being the second level state.

[0041] The beneficial technical effect of the present application is that grooves are arranged on the sides of the opened car doors, pressure sensors, reset mechanisms and baffles are arranged on the two doors of the non-middle grooves, and only one is arranged in the middle groove. In this way, when there is a fine object, the fine object is clamped by the non-middle groove, the pressure signal of the middle pressure sensor becomes large, thereby identifying the fine linear object by clamping, and accidents are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 、 3 It is a structural schematic diagram of an elevator anti-pinch detection device of the present application.

[0043] Figure 2 It is a module schematic diagram of an elevator anti-pinch detection system of the present application.

[0044] Figure 4 It is a step flowchart of an elevator anti-pinch detection method of the present application. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0047] The present application will be further described below with reference to the drawings and specific embodiments, but is not limited by the present application.

[0048] Referring to Figure 1 , the present application provides an elevator anti-pinch detection device applied to an elevator car. The elevator car has a first car door (A) and a second car door (B) that are opened. The side of the first car door is provided with three first grooves (1) arranged transversely in sequence. The side of the second car door is provided with three second grooves (2) arranged transversely in sequence and corresponding to the first grooves one by one. The first grooves and the second grooves extend longitudinally.

[0049] The elevator anti-pinch detection device comprises:

[0050] A first pressure sensor (3a), a first reset mechanism (4a) and a first baffle (5a) are arranged in each first groove (1);

[0051] A second pressure sensor (3b), a second reset mechanism (4b) and a second baffle (5b) are arranged in the two second grooves (2) in sequence;

[0052] The first baffle (5a) longitudinally penetrates the first groove (1) where it is arranged;

[0053] The second baffle (5b) longitudinally penetrates the second groove (2) where it is arranged;

[0054] When the first car door (A) and the second car door (B) are in the open state and the first reset mechanism (4a) and the second reset mechanism (4b) are both in the free state, the front end of the first baffle (5a) protrudes from the side of the first car door (A), and the front end of the second baffle (5b) protrudes from the side of the second car door (B).

[0055] By arranging grooves on both sides of the open car door, pressure sensors, reset mechanisms and baffles are arranged in the non-central grooves, and only one of these components is arranged in the central groove. In this way, when there are fine objects, the fine objects are clamped by the non-central grooves, the pressure signal of the first pressure sensor in the central groove becomes larger, and the problem of being unable to detect or fix the linear foreign matter due to the diameter being too small can be solved, thereby avoiding accidents.

[0056] Further, the first reset mechanism (4a) and the second reset mechanism (4b) are both springs.

[0057] Further, the first pressure sensor (3a) is arranged at the bottom of the first groove (1); and the second pressure sensor (3b) is arranged at the bottom of the second groove (2).

[0058] Further, the first groove (1) longitudinally penetrates the side of the first car door (A); and the second groove (2) longitudinally penetrates the side of the second car door (B).

[0059] The baffles are continuous and uninterrupted from top to bottom, and the distance to the upper and lower edges of the car door is small, effectively reducing the detection blind area.

[0060] Further, the front end surface of the first baffle (5a) and the front end surface of the second baffle (5b) are both sawtooth-shaped.

[0061] The sawtooth shape can increase the friction of the front end surface of the baffle, ensuring that the linear foreign matter is fixed. Each tooth of the sawtooth on the front end surface of the first baffle and the second baffle penetrates the front end surface of the baffle in the vertical direction.

[0062] Referring to Figure 2 The application further provides an elevator anti-pinch detection system, comprising:

[0063] The elevator anti-pinch detection device as described above;

[0064] A data collection module (6) connected to each of the first pressure sensors (3a) and the second pressure sensors (3b) collects pressure signals of the first pressure sensors (3a) and the second pressure sensors (3b);

[0065] A preprocessing module (7) connected to the data collection module (6) processes the collected pressure signals to form a level state sequence;

[0066] An abnormality determination module (8) connected to the data collection module (7) determines whether there is a foreign object between the first car door and the second car door according to the level state sequence and outputs a determination result;

[0067] A switch control module (9) connected to the abnormality determination module (8) is configured to:

[0068] When the determination result indicates that there is no foreign object, the first car door and the second car door are controlled to be closed at a car door closing time;

[0069] When the determination result indicates that there is a foreign object, the first car door and the second car door are controlled to be in an open state.

[0070] Further, the abnormality determination module (8) is configured to:

[0071] When the level state sequence is a first level state sequence, the determination result indicating that the first car door (A) and the second car door (B) are in an open state and no foreign object exists between them is outputted, and the first level state sequence refers to that the pressure signals of each of the first pressure sensors (3a) and the second pressure sensors (3b) are in a first level state;

[0072] When the level state sequence is a second level state sequence, the determination result indicating that the first car door (A) and the second car door (B) are in a closed state and no foreign object exists between them is outputted, and the second level state sequence refers to that the pressure signal of the first pressure sensor (3a) in the first recess (1) in the middle of the three first recesses (1) is in a second level state, and the pressure signals of the first pressure sensors (3a) in the first recesses (1) on both sides of the three first recesses (1) and the pressure signal of the second pressure sensor (3b) are in the second level state;

[0073] When the level state sequence is neither the first level state sequence nor the second level state sequence, the determination result indicating that there is a foreign object between the first car door (A) and the second car door (B) is outputted.

[0074] In the detection device of the present application, when the two car doors (A, B) are opened, in the normal state, the first reset mechanism (4a) and the second reset mechanism (4b) naturally stretch and are in a free state, the first baffle (5a) and the second baffle (5b) protrude from the side of the car door, at this time, the pressure signals of the first pressure sensor (3a) and the second pressure sensor (3b) are at a low level. When the two car doors (A, B) are closed, in the normal closing state, the corresponding two first baffles (5a) and second baffles (5b) in the non-middle first groove (1) and the opposite second groove (2) contact and extrude each other, so that the first reset mechanism (4a) and the second reset mechanism (4b) are compressed, and the extrusion force is transmitted to the corresponding pressure sensor, at this time, the pressure signals of the pressure sensors in the non-middle first groove (1) and the second groove (2) are at a high level, and the three second grooves (2) in the middle second groove (2) are not provided with pressure sensors, reset mechanisms, baffles and the like, the baffle of the first groove (1) in the middle naturally extends into the middle second groove (2), and the pressure signal of the pressure sensor is still at a low level. When the car door is closed, if there is a linear foreign object, the first groove (1) and the second groove (2) on both sides of the side will clamp the linear foreign object, and the pressure signal of the pressure sensor in the first groove (1) and the second groove (2) will still be at a high level, but because the linear foreign object is clamped, when the door is closed, the first baffle (5a) of the first groove (1) in the middle is resisted by the linear foreign object and cannot freely penetrate into the second groove (2) in the middle, the first reset mechanism (4a) of the first groove (1) in the middle is compressed, and the resistance is transmitted to the first pressure sensor (3a) inside, so that the pressure sensor (3a) in the first groove (1) in the middle changes to a high level, thereby it can be determined that there is a foreign object, and the car door is in an abnormal state, and the door is opened. There can be other situations, for example, if there is a linear object, in the opening state, the baffles in any one of the grooves are blocked by the foreign object and cannot freely protrude, so that the pressure signal of the corresponding pressure sensor is at a high level, and therefore it is determined as an abnormal state, and the car door is controlled not to be closed temporarily, and is closed only when the pressure signals are all changed to a low level, thereby further avoiding accidents. That is, if the individual pressure sensor of the two car doors detects an increase in pressure, it means that a linear foreign object or other type of foreign object is blocked, at this time, the system detects an abnormal signal and controls the door to be opened.

[0075] For example, see Figure 3, assuming that the three grooves on the car door A are arranged in sequence A-101, A-102, A-103 transversely, the groove numbered A-102 is the groove in the middle, and the grooves numbered A-101 and A-103 are the grooves not in the middle; the pressure sensors in A-101, A-102, and A-103 are A-201, A-202, and A-203 respectively, the springs as the reset mechanism are A-301, A-302, and A-303 respectively, and the baffles are A-401, A-402, and A-403 respectively. Assuming that the three grooves on the car door B are arranged in sequence B-101, B-102, B-103 transversely, the groove numbered B-102 is the groove in the middle, and the grooves numbered B-101 and B-103 are the grooves not in the middle; the pressure sensors in B-101 and B-103 are B-201 and B-203 respectively, the springs as the reset mechanism are B-301 and B-303 respectively, and the baffles are B-401 and B-403 respectively.

[0076] In the door opening state, the five baffles all extend out of the car door, the spring compression amount is small, the spring force is small, and the pressure signal output of the five pressure sensors is small. When the door is closed, if there is a linear foreign object in the middle of the door, the four baffles A-401, A-403, B-401, and B-403 on the outside of the two car doors will first contact each other to fix the foreign object. At this time, if the door continues to close, the baffle A-402 of the car door A will be blocked by the foreign object, at which time the pressure signal output of the pressure sensor increases, and the system will control the door to open after monitoring the abnormal signal.

[0077] In the normal closing state of the door, the baffles A-401, A-403, B-401, and B-403 contact each other and compress the springs, the pressure sensor A-201, A-203, B-201, and B-203 output increases, the baffle A-402 extends into the groove B-102, the spring A-302 length does not change, and the pressure sensor A-202 output does not change. In this case, the system judges that it is a safe state only, and the elevator can move.

[0078] Suppose that the pressure sensor outputs a low-level signal 0 when the door is opened, and outputs a high-level signal 1 when the door is closed or detects a foreign object, then the output signal state combination of each pressure sensor corresponds to the actual possible situation as shown in the following table:

[0079]

[0080]

[0081] It can be seen that the door can be normally closed only when the output signals of the five pressure sensors are in the combination of serial number 24, and the pressure of the sensor increases in any other case, which indicates that there is a foreign object blocking, at which time the system detects an abnormality and the door opens.

[0082] Specifically, the alarm module (10) is connected to the abnormality determination module (8), and when the determination result indicates that there is a foreign object, alarm information is generated.

[0083] The data collection module (6) is further configured to output the pressure signals of the pressure sensors to the preprocessing module (7) after delay processing, so as to ensure that the pressure signals of the pressure sensors are generated at the same time, that is, to realize pressure signal synchronization and avoid misjudgment. The preprocessing module (7) processes the pressure signals after delay processing to form a level state sequence.

[0084] Referring to Figure 4 The application further provides an elevator anti-pinch detection method using the elevator anti-pinch detection device.

[0085] Step A1, collecting pressure signals of the first pressure sensor and the second pressure sensor;

[0086] Step A2, processing the collected pressure signals to form a level state sequence;

[0087] Step A3, determining whether there is a foreign object between the first car door and the second car door according to the level state sequence;

[0088] If not, step A3 is executed;

[0089] If yes, step A4 is executed;

[0090] Step A3, controlling the first car door and the second car door to be closed at a closing time of the car door;

[0091] Step A4, controlling the first car door and the second car door to be in an open state.

[0092] Further, in step A3,

[0093] When the level state sequence is the first level state sequence, it is determined that the first car door and the second car door are in an open state and no foreign object exists between them, and step A3 is continued to be executed;

[0094] When the level state sequence is the second level state sequence, it is determined that the first car door and the second car door are in a closed state and no foreign object exists between them, and step A3 is continued to be executed;

[0095] When the level state sequence is neither the first level state sequence nor the second level state sequence, it is determined that there is a foreign object between the first car door and the second car door;

[0096] The first level state sequence refers to that the pressure signals of each first pressure sensor and second pressure sensor are in a first level state.

[0097] In the second level state sequence, the pressure signal of the first pressure sensor in the first groove in the middle is the second level state, and the pressure signals of the first pressure sensors in the first grooves on both sides and the pressure signal of the second pressure sensor are the second level state.

[0098] The above merely describes the preferred embodiments of the present application, but does not limit the implementation and protection scope of the present application. Those skilled in the art should realize that any equivalent replacement and obvious changes made according to the content of the present application should be included in the protection scope of the present application.

Claims

1. An elevator anti-pinch detection device, characterized by, The application is applied to an elevator car, the elevator car has a first car door and a second car door, the side of the first car door is provided with three first grooves arranged in sequence in the transverse direction, the side of the second car door is provided with three second grooves arranged in sequence in the transverse direction and corresponding to the first grooves, and the first grooves and the second grooves extend in the longitudinal direction; The elevator anti-pinch detection device comprises: Each first groove is provided with a first pressure sensor, a first reset mechanism and a first baffle; Two second grooves among the three second grooves are provided with a second pressure sensor, a second reset mechanism and a second baffle connected in sequence; The first baffle longitudinally penetrates the first groove where the first baffle is located; The second baffle longitudinally penetrates the second groove where the second baffle is located; When the first car door and the second car door are in the open state and the first reset mechanism and the second reset mechanism are in the free state, the front end of the first baffle protrudes from the side of the first car door, and the front end of the second baffle protrudes from the side of the second car door.

2. An elevator anti-entrapment detection device as set forth in claim 1, wherein The first reset mechanism and the second reset mechanism are both springs.

3. An elevator anti-entrapment detection device as set forth in claim 1, wherein The first pressure sensor is arranged at the bottom of the first groove where the first pressure sensor is located, and the second pressure sensor is arranged at the bottom of the second groove where the second pressure sensor is located.

4. An elevator anti-entrapment detection device as set forth in claim 1, wherein The first groove longitudinally penetrates the side of the first car door, and the second groove longitudinally penetrates the side of the second car door.

5. An elevator anti-entrapment detection device as set forth in claim 1, wherein, The front end surface of the first baffle and the front end surface of the second baffle are both sawtooth-shaped.

6. An elevator anti-pinch detection system characterized by, The application further provides an elevator anti-pinch detection device and a data processing method. The elevator anti-pinch detection device comprises: A data collection module connected to each first pressure sensor and second pressure sensor to collect pressure signals of the first pressure sensors and the second pressure sensors; A preprocessing module connected to the data collection module to process the collected pressure signals to form a level state sequence; An abnormality judgment module connected to the data collection module to judge whether there is foreign matter between the first car door and the second car door according to the level state sequence and output a judgment result; A switch control module connected to the abnormality judgment module to: When the judgment result indicates that there is no foreign matter, control the first car door and the second car door to be closed at a car door closing time; When the judgment result indicates that there is foreign matter, control the first car door and the second car door to be in the open state.

7. An elevator entrapment detection system as in claim 6, wherein, The abnormality judgment module is used to: When the level state sequence is a first level state sequence, output a judgment result indicating that the first car door and the second car door are in the open state and there is no foreign matter between the first car door and the second car door, wherein the first level state sequence refers to that the pressure signals of each first pressure sensor and second pressure sensor are in a first level state. when the level state sequence is a second level state sequence, outputting a result of judging that the first car door and the second car door are in a closed state and no foreign matter exists between the first car door and the second car door, the second level state sequence being that the pressure signal of the first pressure sensor in the first groove in the middle of the three first grooves is in a second level state, and the pressure signals of the first pressure sensors in the first grooves on the two sides of the three first grooves and the pressure signal of the second pressure sensor are in second level states; when the level state sequence is neither the first level state sequence nor the second level state sequence, outputting a result of judging that a foreign matter exists between the first car door and the second car door.

8. An elevator anti-pinch detection method characterized by comprising: Use the elevator anti-pinch detection device according to any one of claims 1-5, comprising: Step A1, collecting the pressure signals of the first pressure sensor and the second pressure sensor; Step A2, processing the collected pressure signals to form a level state sequence; Step A3, judging whether a foreign matter exists between the first car door and the second car door according to the level state sequence: if not, executing Step A3; if yes, executing Step A4; Step A3, controlling the closing of the first car door and the second car door at a car door closing time; Step A4, controlling the first car door and the second car door to be in an open state.

9. A method of elevator anti-pinch detection as defined in claim 8, wherein, In the step A3: when the level state sequence is a first level state sequence, judging that the first car door and the second car door are in an open state and no foreign matter exists between the first car door and the second car door, and continuing to execute the step A3; when the level state sequence is a second level state sequence, judging that the first car door and the second car door are in a closed state and no foreign matter exists between the first car door and the second car door, and continuing to execute the step A3; when the level state sequence is neither the first level state sequence nor the second level state sequence, judging that a foreign matter exists between the first car door and the second car door; wherein the first level state sequence is that the pressure signals of each of the first pressure sensor and the second pressure sensor are in a first level state; wherein the second level state sequence is that the pressure signal of the first pressure sensor in the first groove in the middle of the three first grooves is in a second level state, and the pressure signals of the first pressure sensors in the first grooves on the two sides of the three first grooves and the pressure signal of the second pressure sensor are in second level states.

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