Elevator passenger reverse driving safety monitoring and control system and monitoring method

Abstract

The present invention discloses a safety monitoring and control system for reverse travel of elevator passengers, which includes a core control system and a reverse travel judgment system, an alarm, a display device, a braking device, a reset device, and a wireless transmission device connected to the core control system; the reverse travel judgment system includes six gravity sensors installed under each step; three of the six gravity sensors are arranged at equal intervals on one long side, and the other three are arranged at equal intervals on the other long side. This system can minimize casualties caused by reverse travel to the greatest extent, and the operation cost of the system is low, the reliability is high, and it has strong practical value. Applying it to an escalator will surely greatly improve the operation safety of the elevator.

Description

Technical Field

[0001] The present invention relates to a monitoring system, and in particular to an elevator passenger reverse driving safety monitoring and control system and a monitoring method. Background Art

[0002] Escalators are a very common type of public elevator nowadays, and can be seen everywhere in subways, hospitals, shopping malls, supermarkets, etc. Because such elevators run at a high speed and carry a large number of passengers, it greatly facilitates everyone's travel. While people gain convenience, dangers also follow. Since people often take escalators, they relax their safety awareness when taking them. There are warm reminders posted under the escalators, but not many passengers read them carefully. When taking an escalator, one should not reverse drive on the escalator, should not run and play on the escalator, should not use the escalator to carry goods, and should not straddle multiple steps on the escalator.

[0003] Casualty incidents caused by reverse play often occur. Although emergency stop buttons are now equipped on all escalators, there is a relatively long reaction time from when a passenger falls while reversing to when the surrounding staff presses the button, and this time will directly determine the degree of injury to the passenger. If there are no relevant personnel around during reverse driving, the consequences will be unimaginable. Summary of the Invention

[0004] Object of the Invention: The object of the present invention is to provide an elevator passenger reverse driving safety monitoring and control system and a monitoring method that improve the safety of elevator operation, have low cost, and high reliability.

[0005] Technical Solution: The elevator passenger reverse driving safety monitoring and control system of the present invention includes a core control system and a reverse driving judgment system, an alarm, a display device, a braking device, a reset device, and a wireless transmission device connected to the core control system; the reverse driving judgment system includes six gravity sensors installed under each step; three of the six gravity sensors are arranged at equal intervals on one long side, and the other three are arranged at equal intervals on the other long side.

[0006] The reverse driving judgment system will complete real-time reverse driving monitoring and transmit the monitoring results to the control system. Once the control system receives a signal indicating the occurrence of reverse driving behavior, it will first simultaneously activate the alarm and the display device to achieve the warning function through sound and image at the same time, and transmit the signal to the master control room through the wireless transmission system to notify the monitoring personnel to enter the site for intervention. While warning, the control system is still receiving signals from the reverse driving judgment system in real time. If the received signal indicates that the reverse driving behavior is still continuing, the system will activate the braking device to complete the stop function of the elevator until the reverse driving behavior stops. After the reverse driving behavior stops for a period of time, automatic reset is completed.

[0007] Further, the total measurement range of the six gravity sensors is not less than the weight of a single-layer elevator plus the number of passengers on a single layer, and the accuracy requirement is not lower than the weight of a freely moving child.

[0008] Further, the braking device includes an elevator holding device or an elevator automatic power-off module.

[0009] Further, the reset device includes an elevator holding release device or an elevator power supply recovery module.

[0010] A monitoring method for a safety monitoring and control system for reverse travel of elevator passengers according to the present invention includes the following steps:

[0011] (1) Number the steps of the entire escalator, mark the first step as T1, and sequentially mark them as T2, T3,..., T K-1 , T K ;

[0012] (2) When a passenger is at the i-th step at this time, that is, standing on the T i -th step, determine through the gravity sensor. If T i increases and T i+1 decreases, it is judged as a reverse movement N once. N1, N2, N3, and N4 are used to represent four reverse movement determinations respectively;

[0013] (3) Real-time monitor the gravity sensors of all steps. If there is an increase or decrease in gravity, quickly enter the next-level determination mode;

[0014] (4) If one increases and one decreases for two adjacent steps, determine the walking direction. If it is determined as a reverse movement, it is determined that N1 reverse movement occurs. To prevent false alarms, enter the next-level N2 reverse movement determination;

[0015] (5) If N2 reverse movement is determined to occur, enter the warning mode. The core controller will activate the alarm and the display for warning, and at the same time perform the N3 reverse movement determination;

[0016] (6) If N3 reverse movement continues to occur, immediately perform a braking operation;

[0017] (7) While braking, determine whether N4 reverse movement continues to occur. If the reverse movement stops at this time, complete the reset operation and resume the operation of the elevator.

[0018] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages: The safety alarm device for passengers walking in the reverse direction on the escalator of the present invention can automatically detect the walking direction of passengers on the escalator. Once it detects that a passenger is walking in the reverse direction, it will automatically give an early warning. If the reverse behavior continues after the early warning, the system will automatically enter the braking state, thus avoiding the occurrence of danger to the greatest extent. When the reverse behavior stops, the system can automatically resume operation.

[0019] This system can minimize the casualties caused by walking in the reverse direction, and the operation cost of the system is low, the reliability is high, and it has strong practical value. Applying it to the automatic escalator will greatly improve the operation safety of the escalator. Brief description of the drawings

[0020] Figure 1 is the basic flowchart of the reverse monitoring and control system for the escalator of the present invention;

[0021] Figure 2 is the hardware block diagram of the system of the present invention;

[0022] Figure 3 is the installation diagram of the gravity sensor of the present invention;

[0023] Figure 4 is the diagram of the escalator step numbering method and the running direction;

[0024] Figure 5 is the reverse determination flowchart of the present invention. Detailed implementation manners

[0025] The technical solution of the present invention will be further described below in conjunction with the drawings.

[0026] The process of the reverse monitoring and control system for the escalator designed by the present invention is as Figure 1 shown. This system will conduct real-time reverse monitoring and judge at any time whether reverse occurs. Once it detects the occurrence of reverse behavior, it will immediately give an automatic early warning. If the early warning is ineffective, it will enter the braking state. In the braking state, the reverse monitoring is still running. When the reverse behavior stops, the system will automatically reset and enter the normal running state.

[0027] The basic hardware block diagram structure of this system is as Figure 2As shown in the figure, it includes a reverse judgment system, a core control system, an alarm, a display device, a braking device, a reset device, and a wireless transmission device. The reverse judgment system will complete real-time reverse monitoring and transmit the monitoring results to the control system. Once the control system receives a signal indicating the occurrence of a reverse behavior, it will first start the alarm and the display device simultaneously, perform real-time warning functions through both sound and images, and transmit the signal to the master control room through the wireless transmission system to notify the monitoring personnel to enter the scene for intervention. While giving the warning, the control system is still receiving signals from the reverse judgment system in real time. If the received signal indicates that the reverse behavior is still continuing, the system will start the braking device to complete the stop function of the elevator until the reverse behavior stops. After the reverse behavior stops for a period of time, it will automatically complete the reset.

[0028] The alarm in this system can be implemented by any generating device, and no specific limitation is made in the present invention. The display device can obtain information through a real-time camera or camera and display it on a liquid crystal display screen. There are many ways to implement the braking device, which can be achieved through an elevator holding device, an automatic power-off method, etc. The reset device can be reset by releasing the holding and restoring power supply and other modes.

[0029] Reverse monitoring in the system is the most important part. This system uses a gravity sensor to make the judgment. The installation of the gravity sensor is as Figure 3 shown. Six gravity sensors are installed under each step. They are labeled A, B, C, D, E, and F. Among them, A, B, and C are arranged at equal intervals on one long side, and D, E, and F are arranged at equal intervals on the other long side. Since a single step is relatively long and people often stand concentrated on one side when standing, A, B, D, and E are used as a group for monitoring, and B, E, C, and F are used as another group for monitoring. It can be seen from the grouping that B and E are shared gravity sensors. If a person's standing position is exactly in the middle position, all six gravity sensors will be sensed, especially B and E are the most obvious. When determining the gravity change, if any one of the two groups changes or B and E change significantly, it is determined that the gravity of this step has changed, and it can be clearly judged whether it has increased or decreased.

[0030] Next, the steps of the entire escalator are numbered to facilitate the determination of reverse behavior. The numbering method is as Figure 4 shown. The first step is denoted as T1, and in accordance with the running direction of the elevator (as shown by the arrow in Figure 4 ), they are successively denoted as T2, T3,..., T K-1 , T K . Gravity sensors are installed on each step in the manner of Figure 3 . Therefore, each step can determine the change in gravity by itself. The following is the analysis of reverse:

[0031] Normal operation is divided into three states: pick-up, transfer, and drop-off.

[0032] When boarding passengers, they pay attention to entering the elevator. Once in the elevator, they will no longer move around. At this time, some steps will detect that the gravity has increased, while the gravity sensing of other steps will remain unchanged. The gravity sensing of no steps will decrease.

[0033] During transmission, in the normal process of transporting passengers, as long as the passengers do not walk between the steps, the gravity sensors of the front and rear stages will not change significantly, only one group of the two groups on a single step will increase and the other group will decrease (the passenger walks left and right on a certain step but does not walk between the steps).

[0034] When passengers get off, the gravity of some steps will decrease significantly, while the gravity of other steps will remain unchanged, and the gravity of no steps will increase.

[0035] When passengers are walking in the elevator, their walking direction can be judged by the changes in gravity sensors on different steps. First of all, since the elevator has a certain speed during normal operation, and the running speed is relatively fast, it is almost impossible for passengers to leap forward or backward when walking up and down the elevator. Therefore, this system does not consider the occurrence of this situation for the time being (if it is taken into consideration, it is only necessary to add the leap-forward gravity changes to the following judgment process). Next, the running direction is judged. If the passenger is on the i-th step at this time, that is, standing on the Ti step, according to the numbering method, the normal running direction of the elevator at this time is as follows Figure 4 As shown by the arrow. If the passenger travels in the opposite direction, that is, the passenger walks from Ti to Ti+1, the gravity induction of Ti will decrease, while the gravity induction of Ti+1 will increase rapidly. Therefore, when the gravity induction of adjacent steps decreases rapidly and the other increases rapidly, it is determined that the passenger has moved in the elevator, and the direction of movement is from the step with reduced gravity induction to the step with increased gravity induction. If the walking direction is opposite to the running direction, the system determines it as reverse movement. In order to prevent the occurrence of false alarms, when a passenger reverses more than two steps in the elevator, the system will issue a warning. When the passenger reverses to the third step, the system will determine that the warning is invalid, and the elevator will be stopped until the system detects no further reverse movement.

[0036] The specific process is as follows Figure 5 The dotted line indicates the judgment of retrograde, and N1, N2, N3, and N4 represent four retrograde judgments respectively. The judgment process is:

[0037] 1. Monitor the gravity sensors of all steps in real time. If the gravity increases or decreases, quickly enter the next level judgment mode.

[0038] 2. If one of the adjacent two levels increases while the other decreases, the moving direction is judged. If it is judged to be retrograde, it is determined that N1 retrograde occurs. To prevent false alarms, enter the next-level N2 retrograde judgment.

[0039] 3. If N2 retrograde is determined to occur, enter the warning mode. The core controller will activate the alarm and the display for warning. At the same time, perform the N3 retrograde judgment.

[0040] 4. If N3 retrograde continues to occur, immediately perform the braking operation.

[0041] Note: A time delay device can be added between N2 and N3 for the warning time interval.

[0042] 5. While braking, judge whether N4 retrograde continues to occur. If the retrograde stops at this time, complete the reset operation and resume the operation of the elevator.

[0043] After the entire system completes the above retrograde judgment, the process of the entire system can be completed. The judgment delay can be freely set according to the operating environment of the elevator during each process.

Claims

1. A monitoring method for a safety monitoring and control system of an elevator passenger moving in the reverse direction, characterized in that, The elevator passenger reverse travel safety monitoring and control system includes a core control system and a reverse travel judgment system, an alarm, a display device, a braking device, a reset device, and a wireless transmission device connected to the core control system; the reverse travel judgment system includes six gravity sensors installed under each step; three of the six gravity sensors are arranged at equal intervals on one long side, and the other three are arranged at equal intervals on the other long side; The control method includes the following steps: (1) Number the steps of the entire escalator. Denote the first step as T1, and successively denote them as T2, T3, ……, T K-1 , T K ; (2) When the passenger is at the i-th step at this time, that is, standing on step T i level, it is judged by the gravity sensor. If T i increases and T i+1 decreases, it is judged as a single reverse N. N1, N2, N3, and N4 respectively represent four reverse judgments; (3) Real-time monitor the gravity sensors of all steps. If there is an increase or decrease in gravity, quickly enter the next-level judgment mode; (4) If there is an increase in one and a decrease in the adjacent two levels, judge the walking direction. If it is determined to be reverse travel, it is determined that N1 reverse travel has occurred. To prevent false alarms, enter the next-level N2 reverse travel judgment; (5) If N2 reverse travel is determined to have occurred, enter the warning mode. The core controller will activate the alarm and the display for warning, and at the same time perform N3 reverse travel judgment; (6) If N3 reverse travel continues to occur, immediately perform a braking operation; (7) While braking, determine whether N4 reverse travel continues to occur. If reverse travel stops at this time, complete the reset operation and resume the operation of the elevator.

2. The monitoring method of the elevator passenger reverse driving safety monitoring and control system according to claim 1, characterized in that, The total range of the six gravity sensors is not less than the weight of a single-layer elevator plus the number of passengers on a single layer, and the accuracy requirement is not lower than the weight of a freely moving child.

3. The monitoring method of the elevator passenger reverse driving safety monitoring and control system according to claim 1, characterized in that, The braking device includes an elevator holding device or an elevator automatic power-off module.

4. The monitoring method of the elevator passenger reverse driving safety monitoring and control system according to claim 1, characterized in that, The reset device includes an elevator holding release device or an elevator power supply restoration module.

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