Elevator door lock detection system

Abstract

The utility model relates to the technical field of elevator automation, in particular to an elevator door lock detection system which comprises a landing door lock, a detection device and a main control module, the detection device comprises a magnetic field structure, a Hall effect module, a pressure detection module and a distance detection module, and the magnetic field structure is arranged on the inner side of a lock hook. The magnetic field intensity inside the magnetic field structure can be changed when a lock arm of the landing door lock enters and exits the magnetic field structure, the Hall effect module is used for collecting the voltage inside the magnetic field structure, the pressure detection module is used for collecting the pressure at the adjacent position of a lock hook of the landing door lock and the lock arm, and the distance detection module is used for collecting the distance between the lock hook and the lock arm. The main control module is electrically connected with the detection device and used for comparing the voltage, the pressure and the distance collected by the detection device with preset threshold values in the main control module, the working state of the landing door lock is checked in real time, potential safety hazards of the landing door lock are found and solved in time after judgment, and the use safety of the elevator landing door is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator automation, in particular to an elevator door lock detection system. Background Art

[0002] Elevators are an indispensable means of transportation in modern society. With the rapid development of cities and the rapid growth of buildings, elevators have become one of the main ways for people to travel in their daily lives. However, safety issues in the use of elevators have always attracted much attention. As one of the key technologies of the elevator system, automatic closing of floor doors is used to ensure the safe closing of floor doors during elevator operation, thereby avoiding potential dangerous events. Automatic closing of floor doors can prevent passengers from accidentally falling due to careless opening of floor doors, ensuring the personal safety of passengers. By automatically detecting the lock status of floor doors, it can not only reduce misoperation caused by manual inspection, but also standardize the use process of elevators and improve the stability of elevator operation.

[0003] The comparative document with publication number CN202245642U discloses an elevator door lock detection system, comprising: a floor door detection device, a magnetic isolation plate and a door lock detection device; the floor door detection device is installed on the elevator floor door device; the magnetic isolation plate is installed on the elevator floor door device and moves with the elevator door panel; the magnetic isolation plate enters the magnetic field generated by the floor door detection device, the floor door detection device detects the weakening of the magnetic field, and outputs a signal that the elevator door is open to the elevator main control board; the door lock detection device outputs a signal that the door lock is open to the elevator main control board when the elevator door lock hook is actuated; after receiving the signal that the elevator door is open output by the floor door detection device and the signal that the door lock is open output by the door lock detection device, the elevator main control board determines that the elevator door is open, which can reduce the probability of misjudgment.

[0004] In reality, there are many reasons that can cause the hook of the elevator floor door lock to jump. In the above-mentioned comparative document, the door lock detection device outputs a signal that the floor door lock is open to the elevator main control board when the hook of the elevator floor door lock moves, and uses the floor door detection device to output a signal that the elevator floor door is open to the elevator main control board by detecting the weakening of the magnetic field. The combination of the two signals can supplement the judgment that the elevator floor door is open. However, since the door lock detection device has too simple a judgment result on the action of the floor door lock, and lacks detection of the floor door lock in the locked state, it is impossible to judge whether the floor door lock is working normally, and it is impossible to timely predict and eliminate the safety hazards of the elevator floor door lock. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to timely discover and resolve the potential safety hazards of elevator floor door locks by checking the working status of elevator floor door locks in real time, thereby improving the safety of elevator floor door use.

[0006] To solve the above technical problems, the utility model provides an elevator door lock detection system, comprising: a floor door lock, comprising a lock hook and a lock arm that are locked and connected to each other; a detection device, comprising a magnetic field structure, a Hall effect module, a pressure detection module and a distance detection module, wherein the magnetic field structure is arranged on the inner side of the lock hook, and when the lock arm enters and exits the magnetic field structure, the magnetic field strength inside the magnetic field structure will change, the Hall effect module is used to collect the voltage inside the magnetic field structure, the pressure detection module is used to collect the pressure at the junction of the lock hook and the lock arm, and the distance detection module is used to collect the distance between the lock hook and the lock arm; and a main control module, which is electrically connected to the detection device, and is used to compare the voltage, pressure and distance collected by the detection device with the preset thresholds in the main control module, so as to determine whether the elevator floor door lock is working normally.

[0007] Preferably, in the above technical solution, the locking arm includes a locking arm fixed end and a locking arm clamping end, the locking arm fixed end is rotatably disposed above the elevator floor door, and the locking arm clamping end extends from above the locking hook to the inside of the magnetic field structure inside the locking hook.

[0008] Preferably, the above technical solution further comprises a magnetic isolation sheet, the locking arm engaging end is configured as a plate-like structure, and the two side surfaces of the locking arm engaging end are coated with the magnetic isolation sheet.

[0009] Preferably, in the above technical solution, the magnetic field structure is arranged to be U-shaped, the opening width of the magnetic field structure is greater than the thickness of the locking arm clamping end, and the opening direction of the magnetic field structure is perpendicular to the two side surfaces of the locking arm clamping end.

[0010] Preferably, in the above technical solution, the bottom of the magnetic field structure is fixed on the locking hook, and the top is kept level with the top of the locking hook.

[0011] Preferably, in the above technical solution, the Hall effect module includes a Hall sensor, and a detection end of the Hall sensor is arranged on the inner wall near the opening of the magnetic field structure.

[0012] Preferably, in the above technical solution, the magnetic field structure includes a magnet, and the magnet is used to generate a magnetic field.

[0013] Preferably, in the above technical solution, the pressure detection module includes a strain sensor, and a strain gauge of the strain sensor is fixed at the junction of the lock hook and the lock arm.

[0014] Preferably, in the above technical solution, the distance detection module includes an infrared distance measuring sensor, and the infrared distance measuring sensor is arranged on the lock hook and is used to measure the distance between the lock hook and the lock arm.

[0015] Preferably, the above technical solution further comprises a display device and an audible and visual alarm, and the display device and the audible and visual alarm are electrically connected to the main control module respectively.

[0016] Compared with the existing technology, the utility model has the following beneficial effects:

[0017] 1. The utility model is an elevator door lock detection system, comprising a floor door lock, a detection device and a main control module, wherein the floor door lock comprises a lock hook and a lock arm which are locked and connected to each other, and the detection device comprises a magnetic field structure, a Hall effect module, a pressure detection module and a distance detection module, which are used to collect the voltage inside the magnetic field structure, the pressure at the junction of the lock hook and the lock arm, and the distance between the lock hook and the lock arm in real time, and realize real-time inspection of the working status of the floor door lock by comparing them with the preset thresholds in the main control module, so as to timely discover and solve the safety hazards of the elevator floor door lock and improve the safety of the use of the elevator floor door.

[0018] 2. The utility model sets the magnetic field structure into a U shape, the opening width of the magnetic field structure is larger than the thickness of the locking arm clamping end, the locking arm clamping end enters the interior of the magnetic field structure from the opening, and the locking arm clamping end does not contact the inner wall of the magnetic field structure, thereby realizing a non-contact detection function of the locking state of the floor door lock, and can accurately determine whether the locking arm clamping end has moved to an effective locking position, and the side surface width of the locking arm clamping end is larger than the side width of the magnetic field structure, which can provide a better magnetic isolation effect.

[0019] 3. The utility model sets a strain sensor. When the lock hook and the lock arm are locked and abut against each other under external force, the strain sensor can effectively detect the pressure at the junction of the lock hook and the lock arm. Moreover, the strain gauge of the strain sensor can be quickly fixed on the inner side surface near the top of the lock hook using adhesive, which is convenient for disassembly and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a first-view structural diagram of the elevator door lock detection system of the utility model.

[0021] Figure 2 This is a second perspective structural diagram of the elevator door lock detection system of the utility model.

[0022] Figure 3 This is a circuit connection diagram of the elevator door lock detection system of the utility model.

[0023] Figure 4 For this utility model Figure 2 A is a partial enlarged view.

[0024] Among them, 1-layer door lock, 11-lock hook, 12-lock arm, 121-lock arm fixed end, 122-lock arm engaging end, 2-detection device, 21-magnetic field structure, 22-Hall effect module, 23-pressure detection module, 231-strain sensor, 24-distance detection module, 241-infrared ranging sensor, 3-main control module, 4-display device, 5-sound and light alarm. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "thick", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0029] like Figure 1-4As shown, the present embodiment discloses an elevator door lock detection system, including a floor door lock 1, a detection device 2 and a main control module 3, wherein the floor door lock 1 includes a lock hook 11 and a lock arm 12 that are locked and connected to each other; the detection device 2 includes a magnetic field structure 21, a Hall effect module 22, a pressure detection module 23 and a distance detection module 24, the magnetic field structure 21 is arranged on the inner side of the lock hook 11, and the lock arm 12 will cause the magnetic field strength inside the magnetic field structure 21 to change when it enters and exits the magnetic field structure 21, the Hall effect module 22 is used to collect the voltage inside the magnetic field structure 21, the pressure detection module 23 is used to collect the pressure at the junction of the lock hook 11 and the lock arm 12, and the distance detection module 24 is used to collect the distance between the lock hook 11 and the lock arm 12; the main control module 3 is electrically connected to the detection device 2, and is used to compare the voltage, pressure and distance collected by the detection device 2 with the preset thresholds in the main control module 3, respectively, to determine whether the floor door lock 1 of the elevator is working normally, and the main control module 3 can preferably be an existing 51 single-chip microcomputer, DSP single-chip microcomputer or stm32 single-chip microcomputer, etc., but the present embodiment is not limited thereto. In this embodiment, a detection device 2 is provided to collect in real time the voltage inside the magnetic field structure 21, the pressure at the junction of the lock hook 11 and the lock arm 12, and the distance between the lock hook 11 and the lock arm 12, and compares them with the preset thresholds in the main control module 3 respectively, so as to realize real-time inspection of the working status of the floor door lock 1, and timely discover and solve the safety hazards of the elevator floor door lock after judgment, thereby improving the safety of the use of the elevator floor door.

[0030] It is worth noting that the preset voltage threshold in the main control module 3 is set to the voltage value collected by the Hall effect module 22 after the lock arm 12 leaves the magnetic field structure 21, the preset pressure threshold is set to the pressure value collected by the pressure detection module 23 at the junction of the lock hook 11 and the lock arm 12 under the minimum external force required to open the elevator floor door, and the preset distance threshold is set to the maximum distance between the lock hook 11 and the lock arm 12 collected by the distance detection module 24 when the floor door lock is locked. The method for judging the abnormal operation of the elevator floor door lock 1 is as follows:

[0031] When the real-time collected distance is less than or equal to the distance threshold and the real-time collected pressure is greater than or equal to the pressure threshold, the main control module 3 determines that the floor door lock 1 is working abnormally and an external force attempts to open the elevator floor door;

[0032] When the real-time acquisition distance is less than or equal to the distance threshold, the real-time acquisition pressure is less than the pressure threshold, and the real-time acquisition voltage reaches the voltage threshold, the main control module 3 determines that the floor door lock 1 is working abnormally and the floor door lock 1 is not locked.

[0033] Specifically, in this embodiment, the locking arm 12 includes a locking arm fixed end 121 and a locking arm clamping end 122, wherein the locking arm fixed end 121 is rotatably disposed above the elevator floor door, and the locking arm clamping end 122 extends from above the lock hook 11 to the inside of the magnetic field structure 21 inside the lock hook 11, and this embodiment also includes a magnetic isolation sheet, which can effectively absorb magnetic field energy. The locking arm clamping end 122 is configured as a plate-like structure, and the magnetic isolation sheet is coated on both side surfaces of the locking arm clamping end 122. When the locking arm clamping end 122 enters the magnetic field structure 21, it will cause the magnetic field strength inside the magnetic field structure 21 to weaken.

[0034] Preferably, the magnetic field structure 21 is configured to be U-shaped, the opening width of the magnetic field structure 21 is greater than the thickness of the locking arm locking end 122, the locking arm locking end 122 enters the interior of the magnetic field structure 21 from the opening, and the locking arm locking end 122 does not contact the inner wall of the magnetic field structure 21, the opening direction of the magnetic field structure 21 is perpendicular to the two side surfaces of the locking arm locking end 122, and the side surface width of the locking arm locking end 122 is greater than the side width of the magnetic field structure 21, which can provide a better magnetic isolation effect.

[0035] Furthermore, the bottom of the magnetic field structure 21 is fixed on the lock hook 11, and the top of the magnetic field structure 21 is kept horizontal with the top of the lock hook 11. When the locking arm engaging end 122 moves above the lock hook 11, the locking arm engaging end 122 completely detaches from the inside of the magnetic field structure 21, and the magnetic field strength inside the magnetic field structure 21 returns to normal. In addition, the magnetic field structure 21 includes magnets for generating a magnetic field, and the magnets are respectively arranged on both sides of the opening of the magnetic field structure 21. The Hall effect module 22 includes a Hall sensor, and the detection end of the Hall sensor is arranged on the inner wall near the opening of the magnetic field structure 21, so that the Hall sensor can accurately detect it.

[0036] Preferably, the pressure detection module 23 in this embodiment includes a strain sensor 231, and the strain gauge of the strain sensor 231 is fixed at the adjacent position of the lock hook 11 and the lock arm 12. Specifically, the strain gauge of the strain sensor 231 is firmly attached to the inner side surface near the top of the lock hook 11 using an adhesive. When the lock hook 11 and the lock arm 12 are locked and abut against each other under external force, the sensitive grid of the strain gauge will be deformed, so that its resistance will change accordingly, and this resistance change is proportional to the external force. This resistance change is converted into a voltage or current change through a certain measurement circuit, and then the display is recorded by a display recording instrument, so that the force magnitude of the measured part can be known.

[0037] Preferably, in this embodiment, the distance detection module 24 includes an infrared distance sensor 241, which is disposed on the lock hook 11 and is used to measure the distance between the lock hook 11 and the lock arm 12. Specifically, the infrared distance sensor 241 can be disposed at the bottom of the lock hook 11, so as to avoid interference from the movement of the lock arm engaging end 122 during detection.

[0038] In addition, the present embodiment also includes a display device 4 and an audible and visual alarm 5, which are electrically connected to the main control module 3 respectively. The display device 4 can be arranged at the entrance of the elevator hall on the first floor, and are electrically connected to the main control modules on each floor respectively, for displaying the working status of the floor door locks of each floor of the elevator, so that maintenance personnel can quickly locate and promptly repair the fault problems of the floor door locks; the audible and visual alarm 5 is arranged at the entrance of each floor of the elevator. When the main control module determines that the door lock of that floor is working abnormally, the light of the audible and visual alarm 5 is controlled to flash and an alarm is sounded. For example, when someone outside the elevator floor door tries to use external force to open the floor door, the light of the audible and visual alarm 5 is controlled to flash and an alarm is sounded, which can prevent the door from being opened violently.

[0039] Thus, the functions of an elevator door lock detection system in this embodiment are as follows:

[0040] (1) Real-time monitoring function

[0041] By setting a detection device with a magnetic field structure, a Hall effect module, a pressure detection module and a distance detection module at the floor door lock, the voltage inside the magnetic field structure, the pressure at the junction of the lock hook and the lock arm, and the distance between the lock hook and the lock arm are collected in real time, thereby realizing the real-time monitoring function of the working status of the floor door lock.

[0042] (2) Comprehensive judgment and positioning function

[0043] By comparing the real-time collected distance, pressure and voltage with the preset thresholds in the main control module, the main control module comprehensively determines whether the floor door lock is working abnormally, and displays the working status of the floor door lock of each floor of the elevator on the display device, which helps maintenance personnel to quickly locate and promptly repair the fault of the floor door lock.

[0044] (3) Non-contact detection function

[0045] By setting the magnetic field structure to be U-shaped, the opening width of the magnetic field structure is larger than the thickness of the locking arm clamping end, and the locking arm clamping end enters the interior of the magnetic field structure from the opening, and the locking arm clamping end does not contact the inner wall of the magnetic field structure, thereby realizing a non-contact detection function of the locking state of the floor door lock, and being able to accurately judge whether the locking arm clamping end has moved to an effective locking position, and the side surface width of the locking arm clamping end is larger than the side width of the magnetic field structure, thereby being able to provide a better magnetic isolation effect.

[0046] (4) Strain gauge pressure detection function

[0047] By setting up a strain sensor, when the lock hook and the lock arm are locked and abut against each other under external force, the strain sensor can effectively detect the pressure at the junction of the lock hook and the lock arm, and the strain gauge of the strain sensor can be quickly fixed on the inner side near the top of the lock hook using adhesive, which is easy to disassemble and install.

[0048] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. An elevator door lock detection system, characterized in that: include: The landing door lock comprises a lock hook and a lock arm which are locked and connected to each other; A detection device, comprising a magnetic field structure, a Hall effect module, a pressure detection module and a distance detection module, wherein the magnetic field structure is arranged on the inner side of the lock hook, and when the lock arm enters and exits the magnetic field structure, the magnetic field strength inside the magnetic field structure will change, the Hall effect module is used to collect the voltage inside the magnetic field structure, the pressure detection module is used to collect the pressure at the junction of the lock hook and the lock arm, and the distance detection module is used to collect the distance between the lock hook and the lock arm; as well as The main control module is electrically connected to the detection device and is used to compare the voltage, pressure and distance collected by the detection device with the preset thresholds in the main control module to determine whether the elevator door lock is working normally.

2. An elevator door lock detection system according to claim 1, characterized in that: The locking arm comprises a locking arm fixed end and a locking arm clamping end, wherein the locking arm fixed end is rotatably disposed above the elevator door, and the locking arm clamping end extends from above the locking hook to the inside of the magnetic field structure inside the locking hook.

3. An elevator door lock detection system according to claim 2, characterized in that: It also includes a magnetic isolation sheet. The locking arm engaging end is configured as a plate-shaped structure. Both side surfaces of the locking arm engaging end are covered with the magnetic isolation sheet.

4. An elevator door lock detection system according to claim 3, characterized in that: The magnetic field structure is configured to be U-shaped, the opening width of the magnetic field structure is greater than the thickness of the locking arm clamping end, and the opening direction of the magnetic field structure is perpendicular to the two side surfaces of the locking arm clamping end.

5. An elevator door lock detection system according to claim 4, characterized in that: The bottom of the magnetic field structure is fixed on the locking hook, and the top is kept level with the top of the locking hook.

6. An elevator door lock detection system according to claim 5, characterized in that: The Hall effect module comprises a Hall sensor, and a detection end of the Hall sensor is arranged on an inner wall close to an opening of the magnetic field structure.

7. An elevator door lock detection system according to claim 1, characterized in that: The magnetic field structure includes a magnet, and the magnet is used to generate a magnetic field.

8. An elevator door lock detection system according to claim 1, characterized in that: The pressure detection module comprises a strain sensor, and a strain gauge of the strain sensor is fixed at the adjacent position of the locking hook and the locking arm.

9. An elevator door lock detection system according to claim 1, characterized in that: The distance detection module comprises an infrared distance measuring sensor, which is arranged on the lock hook and is used to measure the distance between the lock hook and the lock arm.

10. An elevator door lock detection system according to claim 1, characterized in that: It also includes a display device and an audible and visual alarm, and the display device and the audible and visual alarm are electrically connected to the main control module respectively.

Images