A method of preventing a goods lift door from being impacted

Abstract

The present application relates to a kind of cargo elevator anti-collision door method, including distance test probe, alarm, elevator door controller and elevator control system, distance test probe, alarm and elevator control system are electrically connected with elevator door controller respectively, including the following steps: elevator control system self-inspection whether can normal operation;Distance test probe detects whether there is object before elevator door;Distance test probe detects whether object moves to elevator door;Elevator control system detects whether elevator opens door;Elevator door controller detects whether object will hit door;Elevator door controller detects object will hit door, and elevator control system controls alarm alarm.The above-mentioned cargo elevator anti-collision door method, can identify the width and moving speed of object in real time by distance test probe, to determine whether object will hit elevator door, if identifying that there will be hit door phenomenon, then start alarm and warn the person who transports object, make people stop moving object, to effectively realize the emergence of avoiding hit door problem.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and in particular to a method for a freight elevator anti-collision door. Background Technology

[0002] Currently, the frequency of freight elevator door collisions leading to elevator malfunctions is too high in the elevator industry, frequently resulting in customer feedback and complaints from maintenance personnel. The reason is that door collisions during cargo transport cause elevator malfunctions and prevent operation, impacting production schedules. Due to the frequency of collisions, maintenance personnel sometimes have to visit the elevator doors several times a day for repairs. The main reasons for freight elevator door collisions are as follows: 1. Frequently, the door is not fully open when the transported goods are about to enter the elevator, causing a collision; 2. The elevator door opening time has ended, and as it begins to close, goods are being transported into the elevator, causing a collision; 3. Transport personnel are interrupted during cargo transport, and when they resume transporting goods, the elevator doors may have already closed, but the personnel are unaware and the doors collide. To address these technical problems, 3D light curtains are generally used to prevent door collisions, but these are largely ineffective. This is because the detection range of the 3D light curtain decreases as the door closes, making comprehensive detection impossible, and it only detects static goods, making it impossible to anticipate and take countermeasures in advance. To address this issue, a solution needs to be designed to reduce or avoid door collisions that could cause elevator malfunctions and prevent the elevator from operating. Summary of the Invention

[0003] The main objective of this invention is to provide a method for preventing collisions with freight elevator doors, in order to solve the above-mentioned technical problems and to identify in real time whether an object will collide with the door.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for a freight elevator anti-collision door includes a distance testing probe, an alarm, an elevator door controller, and an elevator control system. The distance testing probe is installed above the elevator door and identifies the width and speed of an object. The distance testing probe, alarm, and elevator control system are electrically connected to the elevator door controller, and the method includes the following steps:

[0006] S1. Check if the elevator control system can operate normally via self-test;

[0007] S2. The distance test probe detects whether there is an object at the first set distance L1 in front of the elevator door;

[0008] S3. Distance test probe detects whether an object is moving toward the elevator door;

[0009] S4. The elevator control system detects whether the elevator door is open;

[0010] S5. The elevator door controller detects whether an object will collide with the door.

[0011] S6. In step S5, the elevator door controller detects that the object will not collide with the door, and the elevator control system controls the elevator door to operate normally.

[0012] In step S7 and S5, the elevator door controller detects that an object will hit the door, the elevator control system controls the alarm to sound, and repeats the process to step S1.

[0013] As a preferred technical solution, step S5 further includes the following steps:

[0014] S5.1, The distance test probe detects the width W5 of the object;

[0015] S5.2 Calculate the object's moving speed V0;

[0016] S5.3 Calculate the time T it takes for the object to travel from the first set distance L1 to the elevator door;

[0017] S5.4 Calculate the elevator door opening width W3 during the time T that the object has passed;

[0018] S5.5 Calculate the opening width W4 of the elevator door at time T;

[0019] S5.6. Compare W4 and W5.

[0020] As a preferred technical solution, in step S5.2, the relationship of the moving speed V0 is as follows:

[0021] V0 = (L1 - L2) ÷ T1

[0022] Where L1 is the first set distance at which the distance test probe detects an object in front of the elevator door for the first time, L2 is the second set distance at which the distance test probe detects an object in front of the elevator door for the second time, and T1 is the time it takes for the object to move from the first set distance L1 to the second set distance L2.

[0023] As a preferred technical solution, the first set distance L1 in step S2 is 1.2-1.5m, preferably 1.2m.

[0024] As a preferred technical solution, the second set distance L2 in step S5.2 is 1-1.2m, preferably 1m.

[0025] As a preferred technical solution, in step S5.3, the relationship of time T is as follows:

[0026] T = L1 ÷ V0

[0027] Where L1 is the first set distance at which the distance test probe detects an object in front of the elevator door, and V0 is the moving speed of the object.

[0028] As a preferred technical solution, in step S5.4, the relationship between the elevator door opening width W3 and the time T is as follows:

[0029] W3 = 2 × (W1 ÷ V1)

[0030] Where W1 is the width of a single elevator door panel and V1 is the opening speed of a single elevator door.

[0031] As a preferred technical solution, in step 5.5, the relationship between the elevator door opening width W4 at time T is as follows:

[0032] W4 = W3 + W2

[0033] Where W2 is the opening width of the elevator door when the object reaches the first set distance L1.

[0034] As a preferred technical solution, the distance testing probe includes a receiving probe, a transmitting probe, and a cable. The transmitting probe sends a detection signal to the object, and the receiving probe receives the signal reflected back from the object. The receiving probe and the transmitting probe are electrically connected to the elevator door controller through the cable.

[0035] As a preferred technical solution, the elevator door controller includes a main control module, an alarm module, a door opening module, and a detection module, wherein the main control module is electrically connected to the alarm module, the door opening module, and the detection module respectively.

[0036] The beneficial effects of the present invention are as follows: the above-mentioned freight elevator anti-collision door method can identify the width and moving speed of an object in real time through a distance test probe, thereby determining whether the object will collide with the elevator door. If a collision is detected, an alarm is activated to alert the people transporting the object, so that they stop moving the object and wait for the elevator door to open, thereby effectively avoiding the occurrence of collision problems. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the freight elevator anti-collision door method involved in the present invention;

[0038] Figure 2 This is a schematic diagram of the distance testing probe involved in the present invention;

[0039] Figure 3 This is a wireframe diagram of the freight elevator anti-collision door method involved in the present invention;

[0040] Figure 4 This is a flowchart of the freight elevator anti-collision door method involved in the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] Please combine Figure 1 , Figure 2 and Figure 3 As shown, a method for a freight elevator anti-collision door includes a distance testing probe 2, an alarm 3, an elevator door 4, an elevator door controller 5, and an elevator control system 1. The distance testing probe 2 is installed above the elevator door 4. The distance testing probe 2 identifies the width W5 of object a and the running speed V0 of object a. The length of the distance testing probe 2 is the same as the width of the elevator door 4 to facilitate faster identification of the width W5 of object a. The distance testing probe 2, the alarm 3, and the elevator control system 1 are electrically connected to the elevator door controller 5, and the elevator control system 1 is electrically connected to the elevator door 4. The distance testing probe 2 includes a receiving probe 21, a transmitting probe 22, and a cable 23. The transmitting probe 22 sends a detection signal to object a, and the receiving probe 21 receives the signal reflected back from object a. The receiving probe 21 and the transmitting probe 22... The probe 22 is electrically connected to the elevator door controller 5 via cable 23. In this embodiment, the transmitting probe 22 is an infrared transmitter, and the receiving probe 21 is an infrared receiver. The elevator door controller 5 includes a main control module 51, an alarm module 52, a door opening module 53, and a detection module 54. The main control module 51 is electrically connected to the alarm module 52, the door opening module 53, and the detection module 54 respectively. The alarm module 52 is electrically connected to the alarm 3 and is used to send an alarm to remind the person transporting object a. The door opening module 53 is electrically connected to the elevator control system 1 and is used to identify the opening and closing status of the elevator door 4 and the opening width. The detection module 54 is connected to the distance test probe 2 and is used to identify the width W5 of object a and the running speed V0 of object a. The main control module 51 is used to calculate and send control commands.

[0043] Please refer to Figure 4 As shown, the above-mentioned method for constructing a freight elevator anti-collision door includes the following steps:

[0044] Step S1: Check if the elevator control system can operate normally. If the elevator is in normal condition, proceed to step S2. If the elevator is in abnormal condition, perform the self-check again.

[0045] Step S2: The distance test probe 2 detects whether there is an object a at a first set distance L1 in front of the elevator door 4. The first set distance L1 is 1.2-1.5m, preferably 1.2m. If the object a is detected, proceed to step S3. If the object a is not detected, the elevator door 4 operates normally.

[0046] Step S3: Distance test probe 2 detects whether object a moves toward elevator door 4. If object a moves toward elevator door 4, proceed to step S4. If object a does not move toward elevator door 4, elevator door 4 operates normally. If distance test probe 2 detects that object a does not move for time T2, it is considered that object a is placed at elevator door 4. Distance test probe 2 feeds back to detection module 54, detection module 54 feeds back to main control module 51, main control module 51 sends an alarm signal to alarm module 52, alarm module 52 controls alarm 3 to sound an alarm to remind people, and the alarm stops after 20 seconds, and proceeds to step S1.

[0047] Step S4: The elevator control system 1 detects whether the elevator door 4 is open. If the elevator door 4 is open or in the process of opening, proceed to step S5. If the elevator door 4 is closed or in the process of closing, the elevator control system 1 immediately sends an alarm signal to the main control module 51 and then to the alarm module 52. The alarm module 52 controls the alarm 3 to sound an alarm to alert people and proceed to step S1.

[0048] Step S5: The elevator door controller 5 detects whether object a will collide with the door, and includes the following steps:

[0049] Step S5.1: Distance test probe 2 detects the width W5 of object a.

[0050] Step S5.2: Calculate the moving speed V0 of object a. The formula for moving speed V0 is as follows:

[0051] V0 = (L1 - L2) ÷ T1

[0052] Wherein, L1 is the first set distance at which the distance test probe 2 detects the object a in front of the elevator door for the first time, L2 is the second set distance at which the distance test probe 2 detects the object a in front of the elevator door for the second time. In this embodiment, the second set distance L2 is 1-1.2m, preferably 1m, and T1 is the time it takes for the object a to move from the first set distance L1 to the second set distance L2.

[0053] Step S5.3: Calculate the time T it takes for object a to travel from the first predetermined distance L1 to elevator door 4. The relationship for time T is as follows:

[0054] T = L1 ÷ V0

[0055] Where L1 is the first set distance detected by the distance test probe 2 in front of the elevator door, and V0 is the moving speed of object a.

[0056] Step S5.4: Calculate the elevator door opening width W3 during the time T of object a. The relationship between the elevator door opening width W3 and the time T is as follows:

[0057] W3 = 2 × (W1 ÷ V1)

[0058] Where W1 is the width of a single elevator door 4, and V1 is the opening speed of a single elevator door 4.

[0059] Step S5.5: Calculate the opening width W4 of elevator door 4 at time T. The formula for the opening width W4 of elevator door 4 at time T is as follows:

[0060] W4 = W3 + W2

[0061] Where W2 is the opening width of elevator door 4 when object a reaches the first set distance L1, and W3 is the opening width of elevator door 4 during time T.

[0062] Step S5.6: Compare W4 and W5. If W5 < W4, proceed to step S6. If W5 > W4, proceed to step S7.

[0063] In steps S6 and S5, the elevator door controller 5 detects that object a will not collide with the door, and the elevator control system 1 controls the elevator door 4 to operate normally.

[0064] In steps S7 and S5, if the elevator door controller 5 detects that object a will hit the door, the main control module 51 sends an alarm signal to the alarm module 52. The alarm module 52 controls the alarm 3 to sound an alarm to alert people. At the same time as the main control module 51 sends the alarm signal to the alarm module 52, it also sends an opening signal to the opening module 53. The opening module 53 sends a control signal to the elevator control system 1. The elevator control system 1 controls the elevator door 4 to open immediately and proceeds to step S1.

[0065] The embodiments described above are merely preferred examples of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included within the scope of the present invention patent application.

Claims

1. A method of preventing a collision of a cargo elevator door, the method comprising: The system includes a distance testing probe, an alarm, an elevator door controller, and an elevator control system. The distance testing probe is installed above the elevator door and identifies the width and speed of an object. The distance testing probe, the alarm, and the elevator control system are electrically connected to the elevator door controller, and the system includes the following steps: S1. Check whether the elevator control system can operate normally during self-test; S2, The distance test probe detects whether there is an object at a first set distance L1 in front of the elevator door; S3. The distance test probe detects whether the object is moving toward the elevator door; S4. The elevator control system detects whether the elevator door is open; S5. The elevator door controller detects whether an object will collide with the door; S6. In step S5, the elevator door controller detects that the object will not collide with the door, and the elevator control system controls the elevator door to operate normally. S7. In step S5, the elevator door controller detects that an object will hit the door, the elevator control system controls the alarm to sound, and repeats the process to step S1.

2. The method of claim 1, wherein, Step S5 also includes the following steps: S5.1 The distance testing probe detects the width W5 of the object; S5.2 Calculate the object's moving speed V0; S5.3 Calculate the time T it takes for the object to travel from the first set distance L1 to the elevator door; S5.4 Calculate the elevator door opening width W3 during the time T that the object has passed; S5.5 Calculate the opening width W4 of the elevator door at time T; S5.

6. Compare W4 and W5.

3. The method of claim 2, wherein, In step S5.2, the relationship of the moving speed V0 is as follows: V0 = (L1 - L2) ÷ T1 Wherein, L1 is the first set distance at which the distance test probe detects an object in front of the elevator door for the first time, L2 is the second set distance at which the distance test probe detects an object in front of the elevator door for the second time, and T1 is the time it takes for the object to move from the first set distance L1 to the second set distance L2.

4. The method of claim 3, wherein, The first set distance L1 in step S2 is 1.2-1.5m.

5. The method of claim 3, wherein, The second set distance L2 in step S5.2 is 1-1.2m.

6. The method of claim 3, wherein, In step S5.3, the relationship of time T is as follows: T=L1÷V0 Where L1 is the first set distance at which the distance test probe detects an object in front of the elevator door, and V0 is the moving speed of the object.

7. The method of claim 6, wherein, In step 5.5, the relationship between the elevator door opening width W4 at time T is as follows: W4 = W3 + W2 Where W2 is the elevator door opening width W2 when the object reaches the first set distance L1.

8. The method of claim 1-7, wherein, The distance testing probe includes a receiving probe, a transmitting probe, and a cable. The transmitting probe sends a detection signal to the object, and the receiving probe receives the signal reflected back from the object. The receiving probe and the transmitting probe are electrically connected to the elevator door controller via the cable.

9. The method of claim 8, wherein, The elevator door controller includes a main control module, an alarm module, a door opening module, and a detection module. The main control module is electrically connected to the alarm module, the door opening module, and the detection module, respectively.

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