A control method for a group of escalators running in the same direction

Abstract

The present invention discloses a control method for a group of escalators running in the same direction. The entrance escalator of the escalator group is set as the host machine, and the remaining escalators are set as slave machines. The main board of the host machine transmits the escalator information of the host escalator to the subsequent slave escalator. The slave escalator compares and analyzes the received escalator information with its own actual running speed. The slave escalator adjusts the frequency of the escalator frequency converter according to the comparison result according to a preset speed regulation ratio, so that the running speed of the slave escalator is consistent with that of the host escalator. By using a key switch to set the master-slave relationship for the escalators running in the same direction, the present invention can send the speed, direction, photoelectric and other information of the host escalator to the slave machine, make the slave escalator run at the speed of the host machine, and keep the speed of the escalators running in the same direction consistent. It can also receive the start-up information and start-up direction of the slave machine, and judge whether all the escalators are started and whether the direction is correct, effectively realizing the regulation of the running speed of multiple escalators in the escalator group.

Description

Technical Field

[0001] The present invention relates to the technical field of escalator control, and particularly relates to a control method for a group of escalators running in the same direction. Background Art

[0002] At present, in some scenic spots or deep high-speed rail and subway stations, there is a large vertical drop at the entrance and exit. Multiple escalators arranged continuously in the same running direction are often used to transport passengers. Some of them even have no exit between two adjacent escalators. There are the following problems with escalator groups running in the same direction: 1. The actual running speeds of multiple escalators are different and there are errors compared with the nominal speed. The sources of the errors include the slip rate error of the main engine, the transmission error of the reduction gearbox of the main engine, the chain tension error of the main engine, and the transmission error of the step chain. These errors will accumulate, resulting in the inconsistency between the nominal speed and the actual running speed. In the national standard for escalators, there are regulations on the difference between the nominal speed and the speed measured under rated frequency and rated voltage, and it cannot exceed ±5%. Therefore, although the nominal speeds of two escalators running in the same direction are the same, it is impossible to ensure that the actual running speeds are the same. For two escalators running in the same direction, one escalator is 4.9% faster than the nominal speed, and the other escalator running in the same direction is 4.9% slower than the nominal speed, so the speed difference is 9.8%. When transporting more passengers, it will cause passengers to pile up on the middle staircase platform, resulting in stampede accidents. 2. If the operator forgets to start the subsequent escalators after starting the first escalator, it will cause people to gather on the subsequent escalators. 3. Each entrance and exit of the escalator group running in the same direction is equipped with photoelectric energy-saving detection equipment, which is relatively wasteful.

[0003] For example, Chinese Patent CN107043065B, with a publication date of January 25, 2019, discloses an anti-congestion escalator and its control method, which includes a step belt or conveyor belt for carrying passengers, handrails, and a bed cover plate. A weighing sensor for monitoring the load on the bed cover plate is installed at the lower part of the bed cover plate at the exit of the escalator. A monitoring sensor for monitoring whether there are passengers on the step belt or the conveyor belt is also installed at the exit of the escalator. The anti-congestion control board is connected to the main control board of the escalator. The anti-congestion control board judges whether the escalator is congested according to the detection signals of the weighing sensor and the monitoring sensor and sends a deceleration signal or a stop signal to the main control board. It mainly judges whether the escalator is congested by detecting the load on the bed cover plate at the exit of the escalator and whether there are passengers on the step belt or the conveyor belt near the bed cover plate at the exit. It is for a single escalator and cannot perform linkage control on multiple escalators, and cannot solve the problem of inconsistent actual running speeds of multiple escalators in an escalator group. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the current automatic escalator control method lacks the technical problem of regulating the running speed of multiple escalators in an escalator group. A control method for an automatic escalator group running in the same direction is proposed, which can regulate the running speed of multiple escalators through a master-slave control mode, thereby improving the running efficiency of the escalator group.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a control method for a group of escalators running in the same direction, comprising the following steps:

[0006] Set the entrance escalator of the escalator group as the master, and the remaining escalators as slaves;

[0007] After starting the master escalator, the master mainboard transmits the escalator information of the master escalator to the subsequent slave escalators;

[0008] The slave escalator compares and analyzes the received running speed of the master escalator with the actual running speed of the slave escalator itself according to the received escalator information;

[0009] The slave escalator adjusts the escalator inverter frequency according to the preset speed regulation ratio based on the comparison results, so that the running speed of the slave escalator is consistent with that of the host escalator.

[0010] A control method for an escalator group running in the same direction, wherein the escalator group comprises at least two escalators, the entrance escalator of the escalator group is the first escalator of the escalator group as the entrance, after the entrance escalator is set as the host, when the first escalator, i.e., the entrance host escalator, is started, the control main board of the host escalator transmits the speed value, direction information, and passenger entry and exit photoelectric information of the first escalator to the second and subsequent slave escalators in a communication manner, and when the subsequent escalators are started in the direction of the first escalator, the received speed value is compared with the actual value, and the escalator inverter frequency is increased or decreased according to a preset ratio to make the speed of the master and slave escalators consistent, and at the same time, the subsequent escalators feed back their starting direction information to the first escalator.

[0011] Preferably, the escalator group includes at least two escalators, and the entrance and exit of each escalator are provided with an escalator opening key rotation interface, and the escalator opening key rotation interface is provided with two pairs of switch contacts for setting the master and slave machines. Through the two pairs of switch contacts of the escalator opening key rotation interface, the key can be used to open the escalator and set the master and slave machines for the escalator.

[0012] Preferably, the two sets of switch contacts include a first switch contact and a second switch contact; after inserting the escalator key into the escalator key rotation interface, turning the escalator key to one side closes the first switch contact, and turning the escalator key to the other side closes the second switch contact. The first switch contact and the second switch contact are distributed on both sides of the escalator key insertion port, and can respectively represent different escalator control functions. After the contact is closed, the key and the contact automatically reset when the hand is released, and the switch is turned off.

[0013] Preferably, the main machine setting and slave machine setting of the escalator are performed through the escalator key. The setting processes of the main machine and the slave machine include: continuously triggering 2 short pulses on the first switch contact of the escalator can set this escalator as the main machine; continuously triggering 3 short pulses on the first switch contact of the escalator can set this escalator as the slave machine. Only by setting the main machine first can the slave machine be set successfully, that is, it is impossible to set the escalator as the slave machine by continuously triggering 3 short pulses on the first switch contact without the presence of the main machine.

[0014] Preferably, the process of canceling the main machine setting is: after setting the main machine, continuously trigger 2 short pulses on the second switch of the main machine escalator to cancel the main machine setting of this escalator. The main machine setting of the escalator can be cancelled by continuously triggering 2 short pulses on the second switch, which is used when the main machine is set incorrectly. And only by continuously triggering 2 short pulses on the second switch of the main machine escalator can the main machine be cancelled. After setting the main machine, even if 2 short pulses are continuously triggered on the first switch contact of the remaining escalators during the slave machine setting, the main machine cannot be replaced, and it is regarded as an incorrect instruction and no corresponding action is taken.

[0015] Preferably, the escalator information includes the speed value, direction information and passenger entry and exit optoelectronic information of the main machine escalator. Through the transmission of the escalator information, the slave machine escalator adjusts its own operation according to the operation conditions of the received main machine escalator, so as to control the running speeds of multiple escalators through the master-slave control method and prevent the situation of personnel accumulation caused by inconsistent running speeds of multiple escalators.

[0016] Preferably, when the slave machine escalator starts in the same direction as the main machine escalator, the start information of the slave machine escalator is fed back to the main machine escalator; after the main machine escalator starts, if the main machine escalator does not receive the start information of the subsequent slave machine escalators within the set time T, the main machine escalator will stop running. The start information of the slave machine escalator includes the start direction of the slave machine escalator. After starting the main machine escalator, if a certain one of the subsequent escalators does not start within the set time, that is, the main machine escalator does not receive the start information of the subsequent escalators in time, the first escalator, that is, the main machine escalator, will stop.

[0017] Preferably, the escalator controls different running directions when starting by triggering long pulses on different switch contacts. It can be set that triggering a long pulse on the first switch contact is an upward escalator start instruction, and triggering a long pulse on the second switch contact is a downward escalator start instruction.

[0018] Preferably, the short pulse is a pulse whose switch contact is on for less than 1 second, and the long pulse is a pulse whose switch contact is on for longer than 3 seconds and shorter than 8 seconds. The remaining pulses are invalid instructions.

[0019] Preferably, after all the escalators are started, if no passengers are detected for a period of time a, the escalators will enter a low-speed or stopped energy-saving state. After entering the energy-saving state, photoelectric sensors for detecting passengers can be provided at the entrance of the first escalator entrance of the escalator group and the exit of the last escalator, and a photoelectric sensor can be selected at the exit of the front escalator or the entrance of the rear escalator at the middle stair platform. If the photoelectric sensor at the entrance of the main escalator detects a passenger, the escalator will run at high speed. When the passenger arrives at the exit of the main escalator, the photoelectric detection signal at the exit will be transmitted to the second escalator through the main board communication. After the second escalator receives the exit signal of the main escalator received by the main board, the escalator also runs at high speed to prepare for the transportation of passengers. Similarly, as long as the subsequent escalators receive the exit signal of the front escalator, they will enter the high-speed operation state. If the central photoelectric sensor is installed at the entrance of the subsequent escalator, the main board of the subsequent escalator detects its own entrance photoelectric signal and runs at high speed.

[0020] The substantial effects of the present invention are as follows: the host escalator of the present invention transmits escalator information to the subsequent slave escalator, and the slave escalator adjusts the escalator inverter frequency according to the preset speed regulation ratio based on the received escalator information, so as to achieve the speed synchronization of the escalators in the same direction, and eliminate the risk of trampling caused by the asynchronous escalator speed; the host escalator receives the subsequent escalator start information and direction information, and eliminates the risk of missing the escalator and staggered escalator start; and can use the photoelectric signal of the front escalator exit as the rear escalator entrance signal, reduce the use of subsequent entrance photoelectric sensors, and save costs. The present invention sets the master-slave relationship for escalators running in the same direction through a key switch, and can send the host escalator speed, direction, photoelectric and other information to the slave, so that the slave runs at the host speed and keeps the speed of the escalators in the same direction consistent. It can also accept the slave escalator start information and start direction, and judge whether all escalators are started and whether the direction is opened correctly, effectively realizing the regulation of the running speed of multiple escalators in the escalator group. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the implementation process of this embodiment;

[0022] Figure 2 Schematic diagram of the composition of this embodiment;

[0023] Figure 3 This is a timing diagram of setting the host in this embodiment;

[0024] Figure 4 This is a timing diagram of canceling the host in this embodiment;

[0025] Figure 5 Timing diagram of the slave elevator set in this embodiment;

[0026] Figure 6 Timing diagram of the elevator ascending when starting in this embodiment;

[0027] Figure 7 Timing diagram of the elevator descending when starting in this embodiment.

[0028] Wherein: 1. Main escalator, 2. Slave escalator, 3. Entrance optoelectronic sensor, 4. Exit optoelectronic sensor, 5. Middle optoelectronic sensor. Specific implementation manners

[0029] The following further specifically describes the specific implementation manners of the present invention through specific embodiments and in combination with the accompanying drawings.

[0030] A control method for a group of escalators running in the same direction, as Figure 1 、 Figure 2 shown, includes the following steps:

[0031] Set the entrance escalator of the escalator group as the main machine, and set the remaining escalators as slave machines; after starting the main escalator 1, the main board of the main machine transmits the escalator information of the main escalator 1 to the subsequent slave escalators 2; the slave escalator 2 compares and analyzes the received running speed of the main escalator 1 with the actual running speed of the slave escalator 2 itself according to the received escalator information; the slave escalator 2 adjusts the frequency of the escalator frequency converter according to the comparison result according to a preset speed regulation ratio, so that the running speed of the slave escalator 2 is consistent with that of the main escalator 1.

[0032] The escalator group includes at least two escalators. Optoelectronic sensors for detecting passengers, namely the entrance optoelectronic sensor 3 and the exit optoelectronic sensor 4, are provided at the entrance of the escalator at the first entrance and the exit of the last escalator. One of the exits and entrances of the escalators at both ends of the middle staircase platform is provided with optoelectronics, that is, the middle optoelectronic sensor 5 is selected to be set at the exit of the escalator in front or the entrance of the escalator behind the middle staircase platform. There is an elevator start key at the entrance and exit of each escalator. There are two pairs of switch contacts in the key. When the key is turned to the right, the first switch contact is turned on. When the key is turned to the left, the second switch contact is turned on. When the key is released, the contact automatically resets and the switch is in the off state. The escalator main board has a 485 interface, and communication lines can be set to connect between the main boards.

[0033] In this embodiment, the key can be used to start the escalator and also to set the master and slave escalators. When the first switch contact continuously triggers 2 short pulses, this escalator can be set as the master. After an escalator is set as the master, the remaining escalators cannot be set as the master. If set incorrectly, use the second switch to continuously trigger two short pulses in the reverse direction to cancel the master setting. When the first switch contact continuously triggers 3 short pulses, this escalator can be set as a slave. Only after setting the master first can the slave be successfully set. After the entrance escalator is set as the master, if the direction is incorrect when starting, it is regarded as the exit. The escalator will stop running after 1 second. If the master is not started and the slave is directly started, the slave will stop running after 1 second. When the first switch contact triggers a long pulse, it is an upward escalator start instruction. When the second switch contact triggers a long pulse, it is a downward escalator start instruction. A short pulse means the switch contact is closed for less than 1 second, and a long pulse means it is closed for longer than 3 seconds and shorter than 8 seconds. The control timing diagram of each escalator is as Figures 3 to 7 shown.

[0034] After setting the master and slave escalators in this embodiment, when starting the first master escalator 1, the master main board transmits the speed value, direction information, and passenger entry and exit optoelectronic information of the first escalator to the second and subsequent slave escalators 2 in a communication manner. When the subsequent escalators start in the same direction as the first escalator, they will compare the received speed value with the actual value and increase or decrease the frequency of the escalator frequency converter according to a preset ratio. At the same time, the subsequent escalators will feedback their start direction information to the first escalator. For example, a speed of 0.5M / S corresponds to a frequency of 50HZ, and each 1HZ corresponds to 0.01M / S. The speed of the master escalator 1 is 0.52M / S, and the initial speed of the slave is 0.48M / S, with a difference of 0.04M / S. Then increase the output frequency of the frequency converter of the slave escalator 2 to 54HZ to make the speeds of the master and slave escalators 2 consistent.

[0035] After starting the master escalator 1, if the subsequent escalators are accidentally started in the opposite direction of the first escalator, the subsequent escalators will stop running after a few seconds. After starting the master escalator 1, if a certain subsequent escalator does not start within the set time, that is, the master escalator 1 does not receive the start information of the subsequent escalator in time, the first escalator will stop.

[0036] After all escalators are fully started and there is no one for a period of time, they will enter the energy-saving state of low speed or stop. If the photoelectric sensor at the entrance of the main escalator 1 detects a passenger, the escalator will run at high speed. When the passenger reaches the exit of the main escalator 1, the signal detected by the photoelectric sensor at the exit will be transmitted to the second escalator through the main board communication. After the second escalator receives the exit signal of the main escalator 1 received by the main board, the escalator will also run at high speed to prepare for transporting passengers. Similarly, as long as the subsequent escalators receive the exit signal of the front escalator, they will all enter the high-speed operation state. If the middle photoelectric sensor is installed at the entrance of the subsequent escalator, the main board of the subsequent escalator detects the photoelectric signal at its own entrance and runs at high speed by itself. In addition, the setting of the middle photoelectric sensor 5 can also be cancelled. By using the entrance photoelectric sensor 3, when the main escalator senses the signal transmitted by the entrance photoelectric sensor 3, its main board sequentially delays sending the photoelectric signal to the subsequent escalators, so that the subsequent escalators are sequentially started with a delay, further saving costs.

[0037] In this embodiment, the master-slave relationship of each escalator in the escalator group running in the same direction can be set through the key switch. The speed, direction, photoelectric and other information of the main escalator 1 can be sent to the slave escalator, so that the slave escalator runs at the speed of the master escalator, keeping the speeds of the escalators running in the same direction consistent. It can also receive the start-up information and start-up direction of the slave escalator, and judge whether all the escalators are started and whether the direction is correct, effectively realizing the regulation of the running speed of multiple escalators in the escalator group.

[0038] The above embodiments only express several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A control method for a group of escalators running in the same direction, characterized in that, It includes the following steps: Set the entrance escalator of the escalator group as the host, and the remaining escalators as slaves; At the entrance and exit of each escalator, there is a key rotation interface for starting the escalator. Inside the key rotation interface for starting the escalator, there are a first switch contact and a second switch contact; The setting of the host includes: continuously triggering 2 short pulses on the first switch contact of the escalator to set this escalator as the host; Canceling the host includes: after setting the host, continuously triggering 2 short pulses on the second switch of the host escalator to cancel the host setting of this escalator; After starting the host escalator (1), the host main board transmits the escalator information of the host escalator (1) to the subsequent slave escalators (2); The slave escalator (2) compares and analyzes the received running speed of the host escalator (1) with its own actual running speed according to the received escalator information; The slave escalator (2) adjusts the speed by increasing or decreasing the frequency of the escalator frequency converter according to the comparison result at a preset speed regulation ratio, so that the speed of the slave escalator (2) is consistent with that of the host escalator (1).

2. The control method of an escalator group running in the same direction according to claim 1, characterized in that, The escalator group includes at least two escalators. The first switch contact and the second switch contact are used for master-slave control setting.

3. The control method of an escalator group running in the same direction according to claim 2, characterized in that, After inserting the key for starting the escalator into the key rotation interface for starting the escalator, turn the key for starting the escalator to one side to connect the first switch contact, and turn the key for starting the escalator to the other side to connect the second switch contact.

4. The control method of an escalator group running in the same direction according to claim 2 or 3, characterized in that The host setting and slave setting of the escalator are carried out through the key for starting the escalator. The setting process of the slave includes: continuously triggering 3 short pulses on the first switch contact of the escalator to set this escalator as a slave.

5. The control method of an escalator group running in the same direction according to claim 1, characterized in that, The escalator information includes the speed value, direction information and passenger entry and exit optoelectronic information of the host escalator (1).

6. A control method for a group of escalators running in the same direction according to claim 1, characterized in that, When the slave escalator (2) starts in the same direction as the host escalator (1) runs, the start information of the slave escalator (2) is fed back to the host escalator (1); After the host escalator (1) starts, if the host escalator (1) does not receive the start information of the subsequent slave escalator (2) within the set time T, the host escalator (1) will stop running.

7. The control method of an escalator group running in the same direction according to claim 1, characterized in that, The escalator controls different running directions when starting by triggering long pulses through different switch contacts.

8. A control method for an automatically-operated escalator group running in the same direction according to claim 7, characterized in that, The short pulse is a pulse with the switch contact closed for less than 1S, and the long pulse is a pulse with the switch contact closed for longer than 3S and shorter than 8S.

9. A control method for a group of escalators running in the same direction according to claim 1 or 6, characterized in that After all the escalators start, if no passengers are detected for a period of time a, the escalator will enter an energy-saving state of low speed or stop.

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