Elevator floor door bypass detection system and method

Abstract

The present invention relates to an elevator floor car door bypass detection system and method, which mainly includes: a main MCU, a floor door loop detection device, a car door loop detection device, an elevator main loop detection device and a maintenance loop detection device. The detection system of the present invention has high efficiency, high accuracy, economical applicability and can be widely promoted and applied. It adopts current transformers and MCU single-chip computers, and through the reasonable design of electrical components and measurement processes, the floor car door bypass detection becomes universal and effective, and the system and method do not cause any damage or interference to the elevator circuit, so that the bypass detection of the elevator floor car door becomes fast and efficient.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator inspection and detection, and in particular relates to an elevator floor door bypass detection system and method. Background Art

[0002] An elevator is a device that moves vertically between different floors in a shaft. There are car doors on the elevator car, and corresponding floor doors on the shaft wall lead to each floor. The opening of the car door and the floor door allows passengers to enter and exit the car. When the elevator is running and the car is not at the leveling position, the floor car doors are closed to prevent accidents. At the same time, in order to prevent the passengers in the car from opening the floor car door manually, the elevator door lock must be installed on the floor car door. When the car reaches the leveling position, the floor car door opens, the elevator door lock circuit is disconnected, and the elevator stops running and cannot be started to ensure the safety of passengers. In the process of elevator inspection, the floor car door is the part with the highest frequency of accidents and failures, and its inspection has always been the top priority of elevator inspection. At present, there are more and more fatal accidents caused by people falling into the shaft due to elevator floor doors. According to relevant statistics, elevator accidents caused by floor door systems account for 80%. The door lock device is the most important component in the door system. Whether the door lock of the floor car door meets the requirements is an important condition for judging whether the door system is in good operating condition.

[0003] However, when a problem occurs with the door lock on a certain floor, maintenance personnel need to short-circuit the door lock circuit (floor door and car door locks). This operation always poses a safety hazard to the elevator door opening operation. In order to eliminate this hidden danger, item 2.8(6) was added to the second amendment to the elevator inspection rules, requiring that the floor door and car door bypass devices shall comply with the following requirements: ① The word "Bypass" shall be marked on or near the floor door and car door bypass devices, and the "bypass" state or "off" state of the bypass device shall be marked; ② Normal operation (including any operation of power-operated automatic doors) shall be cancelled when bypassed; the car can only be operated in the maintenance operation or emergency electric operation state; during operation, the auditory signal on the car and the flashing light on the bottom of the car shall work; ③ The floor door closing contact, floor door lock contact, car door closing contact and car door lock contact can be bypassed; the floor door and car door contacts cannot be bypassed at the same time; for manual floor doors, the floor door closing contact and floor door lock contact cannot be bypassed at the same time; ④ An independent monitoring signal is provided to confirm that the car door is in the closed position. Since it is a newly added item, its inspection has become a difficult point. The current common detection method is very complicated, requiring personnel to frequently press buttons and repeatedly enter and exit the car roof, which is not only inefficient but also poses a safety hazard. Summary of the invention

[0004] In view of the shortcomings of the current elevator floor car door bypass detection method, the present invention designs a system and method with high measurement efficiency and accuracy, which can reduce the workload of inspectors and improve the safety of the inspection process, and has no damage or interference to the elevator circuit, so that the bypass detection of the elevator floor car door becomes fast and efficient.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] An elevator floor car door bypass detection system includes: a main MCU, a floor door circuit detection device, a car door circuit detection device, an elevator main circuit detection device and a maintenance circuit detection device, wherein:

[0007] The floor door loop detection device is respectively connected to the main MCU and the floor door lock loop, and is used to receive the trigger signal of the main MCU and control the on and off of the floor door lock loop;

[0008] The car door circuit detection device is respectively connected to the main MCU, the car door lock circuit and the car door fully closed switch, and is used to receive the trigger signal of the main MCU to control the on and off of the car door lock circuit and the car door fully closed switch;

[0009] The elevator main circuit detection device is connected to the main MCU and the elevator main circuit contactor respectively, and is used to detect the on and off of the elevator main circuit contactor, and send the on and off signal to the main MCU;

[0010] The maintenance circuit detection device is connected to the main MCU and the elevator maintenance circuit respectively, and is used to receive the trigger signal of the main MCU to control the on and off of the elevator maintenance up circuit.

[0011] Furthermore, it also includes a display screen, which is connected to the main MCU. The display screen sends the received operation instructions to the main MCU, and receives and displays the detection results output by the main MCU.

[0012] Furthermore, the floor door loop detection device includes: a sub-MCU, an A / D converter and a current transformer connected in sequence, and the sub-MCU is connected to the main MCU, and the current transformer is connected to the floor door lock loop.

[0013] Furthermore, the car door loop detection device includes: a WiFi wireless transmission module, a sub-MCU, an A / D converter and a first current transformer connected in sequence, and the WiFi wireless transmission module is connected to the main MCU, and the first current transformer is connected to the car door lock loop, which is used to control the on and off of the car door lock loop;

[0014] It also includes: a second current transformer connected to the A / D converter and the car door fully closed switch respectively, and is used to control the on and off of the car door fully closed switch.

[0015] Furthermore, the elevator main circuit detection device includes: a sub-MCU, an A / D converter and a current transformer connected in sequence, and the sub-MCU is connected to the main MCU, and the current transformer is connected to the elevator main circuit contactor.

[0016] Furthermore, the maintenance circuit detection device includes: a sub-MCU, an A / D converter and a relay connected in sequence, and the sub-MCU is connected to the main MCU, and the relay is connected to the maintenance up circuit of the elevator.

[0017] In another aspect of the present invention, there is also provided a detection method according to the above-mentioned elevator floor door bypass detection system, comprising the following steps:

[0018] Landing door bypass detection:

[0019] S1: The bypass device of the elevator receives the command to bypass the landing door, the landing door circuit detection device disconnects the elevator's landing door lock circuit, the maintenance circuit detection device closes the elevator's maintenance up circuit, and the elevator main circuit detection device detects the closing status of the elevator main contactor. If it is closed and the elevator starts to go up for maintenance, it means that the bypass device can bypass the landing door;

[0020] S2: The car door circuit detection device disconnects the elevator's car door lock circuit, and the inspection circuit detection device closes the elevator's inspection up circuit. The elevator main circuit detection device detects the closing status of the elevator main contactor. If it is not closed, it means that the bypass device cannot bypass the car door when bypassing the floor door, and the floor door bypass detection complies with the elevator inspection regulations;

[0021] Car door bypass detection:

[0022] S1: The floor door bypass detection step is reset, the bypass device receives the bypass car door command, the car door circuit detection device disconnects the car door lock circuit and the car door closing position switch, the inspection circuit detection device closes the inspection up circuit, and the elevator main circuit detection device detects the closing status of the elevator main contactor. If it cannot be closed, it complies with the elevator inspection regulations, otherwise it does not comply;

[0023] S2: The car door circuit detection device closes the car door closing position switch, the inspection circuit detection device closes the inspection upward circuit, and the elevator main circuit detection device detects the closing status of the elevator main contactor. If it is closed and the elevator starts to inspect and ascend, it means that the bypass device can bypass the car door, otherwise it cannot;

[0024] S3: The car door lock circuit remains closed, the floor door circuit detection device disconnects the floor door lock circuit, the inspection circuit detection device closes the inspection up circuit, and the elevator main circuit detection device detects the closing status of the elevator main contactor. If it is not closed, it means that the bypass device cannot bypass the floor door when bypassing the car door, and the car door bypass detection complies with the elevator inspection regulations.

[0025] The beneficial effects of the present invention include at least: the detection system of the present invention is highly efficient, accurate, economical and applicable, and can be widely promoted and applied. It adopts current transformers and MCU single-chip microcomputers, and through the reasonable design of electrical components and measurement processes, the floor car door bypass detection becomes universal and effective, and the system and method do not cause any damage or interference to the elevator circuit, making the bypass detection of the elevator floor car door fast and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural block diagram of the detection system of the present invention.

[0027] Figure 2 It is a structural block diagram of the layer door loop detection device of the present invention.

[0028] Figure 3 It is a structural block diagram of the car door loop detection device of the present invention.

[0029] Figure 4 This is a structural block diagram of the elevator main circuit detection device of the present invention.

[0030] Figure 5 This is a structural block diagram of the maintenance circuit detection device of the present invention.

[0031] Figure 6 The present invention is a flow chart of the floor door bypass detection method.

[0032] Figure 7 The figure is a flow chart of the car door bypass detection method of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1: This embodiment provides an elevator floor door bypass detection system, which is described in detail as follows.

[0035] According to this embodiment of the present invention, Figure 1 This is a structural diagram of the detection system of the present invention, refer to Figure 1As shown, the elevator floor car door bypass detection system described in the present invention mainly includes: a display screen, a main MCU, a floor door circuit detection device, a car door circuit detection device, an elevator main circuit detection device and a maintenance circuit detection device.

[0036] Figure 2 The structure diagram of the layer door loop detection device of the present invention is as follows: Figure 1 and 2 As shown, the floor door loop detection device includes: a sub-MCU, an A / D converter and a current transformer connected in sequence, and the sub-MCU is connected to the main MCU through a 485 bus, and the current transformer is connected to the floor door lock loop of the elevator, and is used to receive the trigger signal of the main MCU and control the current on and off of the floor door lock loop.

[0037] Figure 3 The structure diagram of the car door loop detection device of the present invention is as follows: Figure 1 and 3 As shown, the car door loop detection device includes: a WiFi wireless transmission module, a sub-MCU, an A / D converter, a first current transformer and a second current transformer, wherein the WiFi wireless transmission module, the sub-MCU, the A / D converter and the first current transformer are connected in sequence, and the WiFi wireless transmission module is wirelessly connected to the main MCU, the first current transformer is connected to the car door lock loop, and is used to control the current on and off of the car door lock loop; the second current transformer is respectively connected to the A / D converter and the car door closed position switch, and is used to control the current on and off of the car door closed position switch. That is, the sub-MCU receives the trigger signal of the main MCU to control the current on and off of the car door lock loop and the car door closed position switch.

[0038] Figure 4 The structure diagram of the elevator main circuit detection device of the present invention is as follows: Figure 1 and 4 As shown, the elevator main circuit detection device includes: a sub-MCU, an A / D converter and a current transformer connected in sequence, and the sub-MCU is connected to the main MCU through a 485 bus, and the current transformer is connected to the elevator main circuit contactor to detect the on and off of the elevator main circuit contactor and send the on and off signal to the main MCU.

[0039] Figure 5 This is a structural block diagram of the maintenance circuit detection device of the present invention, as shown in Figure 1 and 5As shown, the maintenance circuit detection device includes: a sub-MCU, an A / D converter and a relay connected in sequence, and the sub-MCU is connected to the main MCU through a 485 bus, and the relay is connected to the maintenance up circuit of the elevator, and is used to receive the trigger signal of the main MCU to control the on and off of the maintenance up circuit of the elevator, that is, to control whether the elevator is going up for maintenance.

[0040] like Figure 1 As shown, the display screen is connected to the main MCU, receives the operator's instructions on the display screen, sends them to the main MCU, and receives and displays the detection results output by the main MCU.

[0041] Embodiment 2: This embodiment provides a detection method for an elevator floor car door bypass detection system, which mainly includes detection preparation, floor door bypass detection and car door bypass detection steps. The detection method needs to meet the newly added detection rules of the elevator, mainly: the bypass device of the elevator can bypass the floor door, but cannot bypass the car door when bypassing the floor door, the bypass device of the elevator can bypass the car door, but cannot bypass the floor door when bypassing the car door. For details, please refer to the background technology.

[0042] The detection preparation steps mainly include: connecting the connecting lines of the floor door circuit detection device, the elevator main circuit detection device, and the maintenance circuit detection device to the floor door lock circuit, the elevator main contactor auxiliary contact, and the maintenance circuit of the elevator control cabinet, and installing the car door circuit detection device near the car door head, connecting the car door lock circuit and the car door closed position switch circuit.

[0043] According to this embodiment of the present invention, Figure 6 This is a flow chart of the floor door bypass detection method of the present invention, refer to Figure 6 As shown, the floor door bypass detection of the present invention specifically includes the following steps.

[0044] S1: Power-on self-test. The operator selects "Floor door bypass test" on the menu on the display screen. The main MCU issues a command to the floor door circuit detection device to disconnect the elevator's floor door lock circuit, simulating that the floor door is manually opened. Then the main MCU issues a command to the maintenance circuit detection device to close the elevator's maintenance up circuit, simulating that the elevator receives the command to prepare for operation, and uses the elevator main circuit detection device to detect the closing status of the elevator main contactor. If it is not closed, that is, the elevator does not respond to the command, it means that the floor door bypass test is ready and can start the test. That is, the elevator is in a state of simulating the floor door opening, and the floor door bypass test can be performed.

[0045] S2: The operator manually switches the bypass device to the "bypass floor door" state. The bypass device of the elevator receives the bypass floor door command, and the main MCU issues a command to let the maintenance circuit detection device close the elevator's maintenance up circuit, simulating the elevator receiving the command and preparing to run in the bypass floor door state. Then the elevator main circuit detection device detects the closing status of the elevator main contactor. If it is closed and the elevator starts to inspect and ascend, it means that the elevator has responded to the command, indicating that the bypass device can bypass the floor door, which complies with the elevator inspection regulations.

[0046] S3: The main MCU issues a command to the car door circuit detection device to disconnect the elevator's car door lock circuit, simulating that the car door is manually opened, and the maintenance circuit detection device closes the elevator's maintenance up circuit, simulating that the elevator receives a command to prepare for operation, and uses the elevator main circuit detection device to detect the closing status of the elevator main contactor. If it is not closed, it means that the elevator has not responded to the command, that is, the bypass device cannot bypass the car door when bypassing the floor door, and the floor door bypass detection complies with the elevator inspection regulations.

[0047] According to this embodiment of the present invention, Figure 7 This is a flow chart of the car door bypass detection method of the present invention, referring to Figure 7 As shown, the car door bypass detection of the present invention specifically includes the following steps.

[0048] S1: The operator selects "Car door bypass detection" on the menu of the display screen, and all the steps of the floor door bypass detection are reset, the floor door lock circuit is connected, and the floor door is simulated to be closed; then the main MCU issues a command to let the car door circuit detection device disconnect the elevator's car door lock circuit to simulate a car door lock circuit failure; and let the maintenance circuit detection device close the elevator's maintenance up circuit to simulate the elevator receiving a command to prepare for operation; the elevator main circuit detection device detects the closing status of the elevator main contactor. If it cannot be closed, it means that the elevator has not responded to the command, and the car door bypass detection is ready and can be started. That is, the elevator is in a state of simulating a car door lock circuit failure, and the car door bypass detection can be performed.

[0049] S2: Manually switch the bypass device to the "bypass car door" state. The bypass device receives the bypass car door command, and the main MCU issues a command to let the car door circuit detection device disconnect the car door lock circuit and the car door closed switch to simulate the car door being opened manually; the maintenance circuit detection device closes the maintenance up circuit to simulate the elevator receiving the command to prepare for operation; at the same time, the elevator main circuit detection device detects the closing and upward status of the elevator main contactor. If it cannot be closed, it means that the elevator has not responded to the command. When the car door is open, the bypass car door cannot be inspected and operated, which complies with the elevator inspection regulations. If it is closed and can go up, it does not comply with the elevator inspection regulations, which means that the elevator has responded to the command and the car door can be bypassed when the car door is open. The elevator lacks a car door monitoring signal and does not comply with the elevator inspection regulations.

[0050] It should be noted that the elevator floor door and car door are different. To ensure the safety of maintenance personnel and people in the car, the car door cannot be opened under any circumstances. Therefore, when the car door is open, the bypass car door cannot be operated for maintenance, which complies with the elevator inspection regulations. Otherwise, it does not comply. Therefore, it is necessary to detect the following situations when the car door is closed, see steps S2 and S3.

[0051] S3: The main MCU issues a command to the car door circuit detection device to close the car door closing position switch to simulate the car door being closed; the inspection circuit detection device closes the inspection upward circuit to simulate the elevator receiving the command to prepare for operation; at the same time, the elevator main circuit detection device detects the closing and upward status of the elevator main contactor. If it cannot go up, it means that the bypass device cannot bypass the car door, which does not comply with the elevator inspection regulations; if it is closed and the elevator starts to inspect and go up, it means that the bypass device can bypass the car door and there is a car door monitoring signal, which complies with the elevator inspection regulations;

[0052] S4: The car door lock circuit remains closed, and the floor door circuit detection device disconnects the floor door lock circuit to simulate the floor door being opened; the maintenance circuit detection device closes the maintenance up circuit, and at the same time the elevator main circuit detection device detects the closing and upward status of the elevator main contactor. If the upward circuit can be closed, it means that the floor door is also bypassed when the car door is bypassed, which does not comply with the elevator inspection regulations; if it is not closed, it means that the bypass device cannot bypass the floor door when bypassing the car door, and the car door bypass detection complies with the elevator inspection regulations.

[0053] In summary, the detection system of the present invention is highly efficient, accurate, economical and applicable and can be widely promoted and applied. It adopts current transformers and MCU single-chip microcomputers, and through the reasonable design of electrical components and measurement processes, the floor car door bypass detection becomes universal and effective, and the system and method do not cause any damage or interference to the elevator circuit, making the bypass detection of the elevator floor car door fast and efficient.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator floor door bypass detection system, characterized in that: include: Main MCU, floor door circuit detection device, car door circuit detection device, elevator main circuit detection device and maintenance circuit detection device, among which, The floor door loop detection device is respectively connected to the main MCU and the floor door lock loop, and is used to receive the trigger signal of the main MCU and control the on and off of the floor door lock loop; The car door circuit detection device is respectively connected to the main MCU, the car door lock circuit and the car door fully closed switch, and is used to receive the trigger signal of the main MCU to control the on and off of the car door lock circuit and the car door fully closed switch; The elevator main circuit detection device is connected to the main MCU and the elevator main circuit contactor respectively, and is used to detect the on and off of the elevator main circuit contactor, and send the on and off signal to the main MCU; The maintenance circuit detection device is connected to the main MCU and the elevator maintenance circuit respectively, and is used to receive the trigger signal of the main MCU to control the on and off of the elevator maintenance up circuit.

2. An elevator floor door bypass detection system according to claim 1, characterized in that: It also includes a display screen, which is connected to the main MCU. The display screen sends the received operation instructions to the main MCU, and receives and displays the detection results output by the main MCU.

3. The elevator floor door bypass detection system according to claim 1, characterized in that: The floor door loop detection device comprises: a sub-MCU, an A / D converter and a current transformer which are connected in sequence, wherein the sub-MCU is connected to the main MCU, and the current transformer is connected to the floor door lock loop.

4. The elevator floor door bypass detection system according to claim 1, characterized in that: The car door loop detection device comprises: a WiFi wireless transmission module, a sub-MCU, an A / D converter and a first current transformer which are connected in sequence, and the WiFi wireless transmission module is connected to the main MCU, and the first current transformer is connected to the car door lock loop, and is used to control the on and off of the car door lock loop; It also includes: a second current transformer connected to the A / D converter and the car door fully closed switch respectively, and is used to control the on and off of the car door fully closed switch.

5. The elevator floor door bypass detection system according to claim 1, characterized in that: The elevator main circuit detection device comprises: a sub-MCU, an A / D converter and a current transformer which are connected in sequence, wherein the sub-MCU is connected to the main MCU, and the current transformer is connected to the elevator main circuit contactor.

6. The elevator floor door bypass detection system according to claim 1, characterized in that: The maintenance circuit detection device comprises: a sub-MCU, an A / D converter and a relay which are connected in sequence, wherein the sub-MCU is connected to the main MCU, and the relay is connected to the maintenance up circuit of the elevator.

7. A detection method for an elevator floor door bypass detection system according to any one of claims 1 to 6, characterized in that: The following steps are involved: Landing door bypass detection: S1: The bypass device of the elevator receives the command to bypass the landing door, the landing door circuit detection device disconnects the elevator's landing door lock circuit, the maintenance circuit detection device closes the elevator's maintenance up circuit, and the elevator main circuit detection device detects the closing status of the elevator main contactor. If it is closed and the elevator starts to go up for maintenance, it means that the bypass device can bypass the landing door; S2: The car door circuit detection device disconnects the elevator's car door lock circuit, and the inspection circuit detection device closes the elevator's inspection up circuit. The elevator main circuit detection device detects the closing status of the elevator main contactor. If it is not closed, it means that the bypass device cannot bypass the car door when bypassing the floor door, and the floor door bypass detection complies with the elevator inspection regulations; Car door bypass detection: S1: The floor door bypass detection step is reset, the bypass device receives the bypass car door command, the car door circuit detection device disconnects the car door lock circuit and the car door closing position switch, the inspection circuit detection device closes the inspection up circuit, and the elevator main circuit detection device detects the closing status of the elevator main contactor. If it cannot be closed, it complies with the elevator inspection regulations, otherwise it does not comply; S2: The car door circuit detection device closes the car door closing position switch, the inspection circuit detection device closes the inspection upward circuit, and the elevator main circuit detection device detects the closing status of the elevator main contactor. If it is closed and the elevator starts to inspect and ascend, it means that the bypass device can bypass the car door, otherwise it cannot; S3: The car door lock circuit remains closed, the floor door circuit detection device disconnects the floor door lock circuit, the inspection circuit detection device closes the inspection up circuit, and the elevator main circuit detection device detects the closing status of the elevator main contactor. If it is not closed, it means that the bypass device cannot bypass the floor door when bypassing the car door, and the car door bypass detection complies with the elevator inspection regulations.

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