KR101501984B1 - Apparatus for control velocity of escalator and method for control velocity the same - Google Patents

Abstract

The present invention relates to a speed control device for an escalator and a control method thereof, and more particularly to a hand control device for a hand rail, which comprises a hand rail provided in an escalator and a simple and simple speed control device capable of detecting a moving speed of the step, The present invention relates to an escalator speed control device and a control method thereof that can accurately control and stably control an escalator by respectively constituting both the left and right sides of the handrail and the drive sprocket that drives the step, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an escalator,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for controlling a speed of an escalator, and more particularly, to a speed control apparatus and a control method thereof for controlling a handrail and a step provided in the escalator.

Generally, the escalator is a movable staircase, which is conveniently installed in a subway station, a department store, a large-scale shopping mall, and the like, because of its advantage of easy mass transportation and external view.

Wherein the escalator is a device for transporting a user by installing a truss of a steel structure across the upper and lower floor beams, installing an endless continuous chain, a handrail and a step, circulating the handrail and the step by driving the chain, A main drive device for driving the step, and a handrail drive device for driving the handrail.

However, while the escalator is moving, the user is allowed to ride on the step freely without a safety device, so there is a high risk of a fall accident that falls off the center of the body. Because of this structural feature, it is necessary to hold the handrail when boarding the escalator so that it can be safe from a fall accident that loses its center and falls.

However, when the wear and mounting conditions of the driving devices necessary for driving the hand rails and the hand rails are not thoroughly checked, the driving force of the hand rails and the steps used by many users is lowered. And the operation is stopped by the lack of tension of the handrail.

As a result, an accident occurs due to the user's body being centered by the stopping inertia and falling backward. Generally, a large number of users, rather than alone, are pushed down in a chain-like manner.

Therefore, in order to prevent such a personal accident from occurring, according to Japanese Patent Application Laid-Open No. 7-137975 entitled " Tension Adjusting Apparatus for Moving and Passing a Passenger Conveyor ", the tension of the handrail provided in the escalator can be automatically adjusted A tension adjusting device is provided so that the moving speed of the handrail can be maintained at or above a set value without stopping the handrail.

However, the tension adjusting device is complicated in its construction, so that the installation work is not easy, and the operation is canceled due to frequent trouble or the like.

Further, there is a problem in that no measures are taken against the risk of accidents due to the speed difference between the handrail and the step located on the left and right sides of the escalator.

Japanese Patent Application Laid-Open No. 7-137975 (May 30, 1995)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a simple and simple speed control device capable of detecting the speed of movement of a handrail and a step provided on an escalator, I have to.

It is a further object of the present invention to provide a speed control apparatus and a method for controlling the speed control device in a drive sprocket for driving both the left and right hand rails and the step, .

According to an aspect of the present invention, there is provided an escalator speed control apparatus including sensing means for sensing a rotation speed of a handrail and a step provided on both sides of an escalator, A control unit for performing a sequence control and a numerical calculation function so as to perform program control of the escalator and a control unit for controlling the escalator based on the control signal of the control unit, Control means including a relay for supplying or cutting off power; And a warning means for informing a user of a dangerous situation visually or visually based on the judgment information judged by the control means, wherein the sensing means is provided in a state of being in close contact with a corresponding lower surface of the handrail, A gear wheel in which gear teeth and grooves rotatable by mating with drive sprockets for driving the step are continuously formed; And a proximity sensor for counting the number of pulses of the gear wheel for a predetermined time or measuring the time between pulses.

The proximity sensor of the sensing means continuously detects tooth portions and groove portions provided on the left and right sides of the handrail or on the drive sprocket so as to be disposed on the gear wheel and the control portion of the control means And converting the electric signal into a digital signal and storing the speed difference between the left hand and the right hand step to determine a normal operation of the escalator.

The proximity sensor detects a magnetic field in which a magnetic field is distorted as a tooth and a groove portion of the gear wheel are continuously detected in a state where a coil contained in a ferrite core forms and maintains a magnetic field with a predetermined oscillation frequency, coil; An oscillation circuit connected to the detection coil to maintain a high-frequency oscillation of a predetermined frequency so that a detection coil can form a magnetic field; An amplifying circuit for amplifying a change of a minute signal from the oscillation circuit; And a detection circuit which removes unnecessary noise and converts an analog signal into a digital signal and outputs the digital signal.

The power supply unit includes a switching mode power supply (SMPS) that performs intermittent control at a high frequency and obtains various DC voltages through a rectifying and smoothing circuit to supply power for driving the escalator .

The controller may be a programmable logic controller (PLC) of a digital operation for controlling the escalator.

The control unit may include: a power unit that converts power from an external source into a power source usable in the control unit; An input unit for receiving a status signal of the escalator or inputting a control signal; A storage unit for storing various information related to the driving of the escalator; A CPU for decrypting an input signal from the input unit and various information stored in the storage unit and controlling processing contents; And an output unit for outputting the state of the escalator through the CPU.

Wherein the warning unit comprises: a warning sound generating unit for audibly informing the manager and the user when the warning output signal is generated based on the determination information determined by the control unit; And a warning display generating unit for visually informing an administrator and a user when the condition for generating the warning output signal is satisfied.

The speed control method of an escalator according to the present invention is characterized in that the speed of each of the hand rails is measured through respective sensing means provided separately on the left and right sides of the handrail and the speed of each step is controlled by sensing means provided in a drive sprocket for driving the step The proximity sensor of the sensing means counts the number of pulses of the gear wheel or measures the time between the pulses and measures the measured value Transmitting to the control means a measured value of the moving speed; Detecting a deviation of the moving speed by the control means and determining whether it is normal; Informing the manager and the user via the warning means when the deviation of the moving speed between the left and right hand rails and the step is out of a set reference value by the control means; And disconnecting the power supply of the escalator by the control means.

According to the speed control apparatus and control method for the escalator according to the present invention having the above-described configuration, the gear wheel interlocked with the handrail and the step of the escalator, and the proximity sensor for detecting the rotational speed from the gear wheel, By arranging both the left and right sides and the driving sprocket for driving the step, it is possible to easily and easily detect the moving speed of the handrail and the step, and precisely control the escalator, thereby realizing stable operation .

Further, since the sensing means including the gear wheel and the proximity sensor is simple and simple, installation, maintenance, and inspection are convenient and easy.

And, when the deviation of the moving speed of the handrail and the step becomes out of the set reference value, it becomes easy to inform the user through the alarm means.

1 is a configuration diagram showing an apparatus for controlling the speed of an escalator according to the present invention.
Fig. 2 is an installation view showing the mounting state of the sensing means provided in the speed control device of the escalator according to the present invention. Fig. 2a is a sensing means provided on the handrail side, Fig. 2b is a view to be.
3 is a block diagram showing an internal circuit of a proximity sensor included in a speed control device of an escalator according to the present invention.
4 is a view showing an internal configuration of a control unit included in the speed control apparatus of the escalator according to the present invention.
5 is a flowchart showing a speed control method of an escalator according to the present invention.
6 is an operational timing chart showing the speed control of the escalator according to the present invention.
7 is a waveform chart showing a normal pulse of a proximity sensor included in the speed control device of the escalator according to the present invention.
8 is a waveform chart showing an abnormal pulse of a proximity sensor included in a speed control device of an escalator according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 8. FIG.

1, the speed control device for an escalator according to the present invention basically comprises a handrail R provided on both sides of an escalator, a sensing means 100 for sensing a moving speed of a step (not shown) A power supply unit 210 for converting and supplying AC power supplied from a commercial power source to an escalator, a control unit 220 for performing a sequence control and a numerical calculation function so as to perform program control of the escalator, And a relay (230) for supplying or disconnecting power to the escalator based on a control signal of the control unit (220), wherein the control unit (200) And alerting means 300 for informing the user of the dangerous situation visually or visually.

2A, the sensing means 100 is provided on the hand rail R side and the step side, and the sensing means 100 on the handrail R side is provided on the handrail R side, A rotating roller 110 which is in close contact with a corresponding lower surface of the rotating roller 110 and rotates about a fixed axis A when the handrail R is moved; A number of teeth of the gear wheel 120, that is, a number of pulses, or a time between pulses, for a predetermined period of time, And a proximity sensor 130 for measuring the temperature.

2B, the sensing means 100 on the step side is rotatable with the driving sprocket S of the main driving device for driving the step, and the gear wheel 120 And a proximity sensor 130 'for counting the number of teeth, that is, the number of pulses of the gear wheel 120' or measuring the time between the pulses during a predetermined time.

At this time, the sensing means 100 including the gear wheels 120 and 120 'and the proximity sensors 130 and 130' has a simple and simple structure, and is convenient and easy to install, repair, and check.

More specifically, the gear wheel 120 has a predetermined number of tooth portions 121 and groove portions 122 repeatedly formed at equally spaced intervals. When the tooth portions 121 and the groove portions 122 are formed of, for example, a bit signal '0' 'And' 1 ', respectively.

That is, as the handrail (R) of the escalator and the step move, the gear wheels 120 and 120 'rotate. By the proximity sensors 130 and 130' installed close to the gear wheels 120 and 120 ' The tooth portions 121 and 121 'and the groove portions 122 and 122' disposed on the gear wheels 120 and 120 'are continuously detected and the electric signals outputted from the proximity sensors 130 and 130' are detected by the control means 200 as digital signals Converted and stored.

As shown in FIG. 3, the proximity sensors 130 and 130 'that continuously detect the teeth 121 and 121' and the grooves 122 and 122 'in proximity to the gear wheels 120 and 120' The teeth 121 and 121 'and the grooves 122 and 122' of the gear wheels 120 and 120 'are continuously detected in a state where a magnetic field is formed and maintained by a predetermined oscillation frequency, so that a magnetic field is distorted, And a coil 131.

And an oscillation circuit 132 connected to the detection coil 131 to maintain a high-frequency oscillation of a predetermined frequency so that the detection coil 131 can form a magnetic field.

An amplifying circuit 133 for amplifying a change of a minute signal from the oscillation circuit 132 and a detection circuit 134 for removing unnecessary noise and converting an analog signal into a digital signal and outputting the digital signal.

According to the proximity sensors 130 and 130 'configured as described above, the rotational speed of the handrail R and the step can be calculated through the duration of the output unit portion 121 or 121' or the unit groove portion 122 or 122 ' , If the unit angle is 1 degree and the unit bit duration is m seconds, it rotates by 1 degree per m seconds. Therefore, it takes 360 ms to rotate one rotation, that is, 360 degrees, which corresponds to 1 / 360m rotation per one second. Therefore, when converted to rpm, it becomes 1 / 6m rpm.

The power supply unit 210 of the control unit 200 is a switching mode power supply (SMPS) that performs intermittent control at a high frequency and obtains various stable DC voltages through a rectification and a smoothing circuit, The AC power supplied is converted into an electric power for driving the escalator by converting the AC electric power to be supplied to the escalator.

The controller 220 may be a programmable logic controller (PLC) of a digital operation that uses a programmable memory and controls the escalator to perform special functions such as logic, sequencing, timing, counting, and operation through a digital or analog input / , It can perform the role of sequence control, PID (Proportional-plus-Integrate-plus-Derivative) control, analog control and position control.

4, the control unit 220 includes a power unit 221 that converts power from an external source into power that can be used in the control unit 220, and a control unit 220 that receives a status signal of the escalator, A storage unit 223 for storing various information related to drive data, signal processing, application programs and driving for driving the escalator, an input unit 222 for inputting signals from the input unit 222, A CPU 224 for decrypting various information stored in the storage unit 223 and controlling the processing contents; And an output unit 225 for outputting the state of the escalator through the CPU 224. [

In particular, the control unit 220 including such a PLC is used to control the machine and the process in various industrial fields. In the case of installing a conventional wired / non-contact sequence control device, There is an advantage in that the reliability limit and the maintenance difficulty can be prevented.

The relay 230 is connected to the power supply unit 210 and supplies or cuts off power to the escalator on the basis of the control signal of the control unit 220. The relay 230 interrupts the abnormal driving of the escalator.

The control means 200 configured as described above is desirably accommodated in a receptacle (not shown) for protection against external dust and contamination, and is preferably installed at a position where maintenance and inspection are easy.

The warning unit 300 includes a warning sound generating unit 310 for audibly informing an administrator and a user when a condition for generating a warning output signal is generated based on the determination information determined by the control unit 200, And a warning display generator 320 for visually informing the administrator and the user when the condition for generating the warning output signal is satisfied.

For example, the manager can inform the manager automatically by wireless or wired line so as to promptly go to the site where the escalator is installed, to generate a warning sound to the user, or to light the warning light so as to safely get off the escalator.

According to the embodiment of the present invention, the proximity sensors 130 and 130 'of the sensing means 100 are provided on the left and right sides of the handrail R and the drive sprockets S for driving the steps, And the control unit 220 of the control means 200 detects the position of the hand rail R outputted from the sensing means 100. The controller 220 of the control means 200 continuously detects the teeth 121 and 121 'and the groove portions 122 and 122' , The speed difference between the right side and the step is detected to judge the normal operation of the handrail R and the step, so that the escalator can be precisely controlled as well as stable.

Hereinafter, a speed control method of an escalator according to the present invention will be described with reference to the accompanying drawings.

5 is a flowchart showing a speed control method of an escalator according to the present invention. First, through the respective sensing means 100 provided separately on both the left and right sides of the handrail R, .

At the same time, the speed of the step is measured through the sensing means 100 provided in the drive sprocket S for driving the step.

Next, the normal operation of the escalator is determined by comparing the speed between the left and right sides of the handrail (R) and the step.

At this time, the proximity sensors 130 and 130 'of the sensing means 100 count the number of pulses of the respective gear wheels 120 and 120' rotating together with the left and right hand rails R and the drive sprockets S, And transmits the measured value of the measured moving speed to the control means 200. [0064]

When the deviation of the moving speed between the left and right hand rails R and the step deviates from the set reference value, the warning means 300 detects the deviation of the moving speed, And notifies the administrator and the user of the information.

At the same time, the power of the escalator is cut off through the control means (200).

- Experimental Example -

1. Test drive sequence

1) When the operation key of the escalator is activated, check whether the operation lamp in the control unit (PLC) turns on.

2) During the operation of the escalator, it is confirmed whether the input and output pulse signals of the control unit 220 are applied.

3) When the non-magnetic object is approached between the proximity sensor 130 and the gear wheel 120 and the sensing function of the proximity sensor 130 is cut off, the operation raft is turned off and the escalator is stopped.

When restarting, press the reset switch and operate the escalator operation keys.

2. Analysis

1) When a difference in a predetermined ratio (for example, about ± 10%) occurs between the handrail R on the left and right sides and the actual speed in the step speed for a predetermined time (for example, about 10 seconds) during the operation of the escalator, Lt; / RTI >

Example) When the rated speed is 25m / min,

- Rotating roller diameter: Φ 7.6cm

- Number of gear teeth: 21

- Distance per second of handrail and step: 25/60 = 0.417m = 41.7cm

- The circumferential length of the rotating roller: 7.6 cm * 3.14 = 23.9 cm

- Number of pulses per second: (41.7 / 23.9) * 21 = 36.64 = 37

- time per pulse: about 27.3 ms

- Number of pulses per 10 seconds: 370

That is, when the left and right hand rails have a deviation of ± 10%, the number of pulses is more than 37.

2) Stop when the right handrail of the escalator is ± 10% of the rated speed of the left handrail.

3) Stop when the left handrail of the escalator is ± 10% of the rated speed of the right handrail.

4) If the left and right hand rails are ± 10% of the rated speed of the step, stop.

5) The pulse received from the proximity sensor installed on the handrail and the step is calculated as a pulse value per second to set the high speed section, and the data is repeatedly stored and deleted every 10 seconds. At this time, the data is initialized at intervals of 10 seconds in order to reduce the data error due to the accumulation.

As shown in FIG. 6, when the number of normal pulses per second excluding the acceleration interval pulse after the initial start command is counted, the speed of the handrail and the step is sensed by checking the normal high speed section.

For example, as shown in Fig. 7, the pulse at normal speed per pulse operates normally because the pulse of the left proximity sensor and the pulse of the right proximity sensor simultaneously generate the same pulse.

8, in the abnormal pulse, the pulse of the left proximity sensor 130 provided on the left handrail, the pulse of the right proximity sensor 130 provided on the right handrail, and the pulse of the step proximity sensor provided on the drive sprocket (The proximity sensor of the right handrail) generates the time difference, the escalator stops by the stop signal of the control means.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It should be understood that various modifications made by the person skilled in the art are also within the scope of protection of the present invention.

100: sensing means 110: rotating roller
120, 120 ': Gear wheel 130, 130': Proximity sensor
131: Detection coil 132: Oscillation circuit
133: Amplification circuit 134: Detection circuit
200: control means 210: power supply unit
220: control unit 221:
222: input unit 223:
224: CPU 225:
230: Relay 300: Warning means
310: a warning sound generating unit 320: a warning display generating unit

Claims (8)

Sensing means for sensing the rotational speed of the handrail and the step provided on both sides of the escalator;
A power supply for converting and supplying AC power supplied from a commercial power source to an escalator, a control unit for performing sequence control, a numerical calculation function, and a relay for supplying or interrupting power to the escalator for program control of the escalator A control means And
Warning means for informing the user of the risk situation visually or visually,
The sensing means includes a pair of rotating rollers which are in close contact with the back surface of the both hand rails and are driven to rotate in accordance with the movement of the handrail, a pair of gear wheels respectively coupled to the rotating shafts of the rotating rollers, The number of pulses generated due to the rotation of each tooth in the state of being adjacent to the teeth of the gear wheel of the handrail and the gear wheel of the step in the radial direction outside the gear wheel, And a proximity sensor for measuring the time between the electrodes,
The controller compares the pulses of the gearwheel output from the proximity sensor to detect a speed difference between the left and right handrail and the steps of the handrail to determine whether the escalator is operating normally or not, And the control means transmits a control signal to the means for controlling the speed of the escalator.
delete The method according to claim 1,
The proximity sensor includes:
A detection coil in which a magnetic field is distorted as a tooth and a groove portion of the gear wheel are continuously detected in a state in which a coil included in the ferrite core forms and maintains a magnetic field by a predetermined oscillation frequency and a minute signal is changed;
An oscillation circuit connected to the detection coil to maintain a high-frequency oscillation of a predetermined frequency so that a detection coil can form a magnetic field;
An amplifying circuit for amplifying a change of a minute signal from the oscillation circuit; And
And a detection circuit which removes unnecessary noise and converts an analog signal into a digital signal and outputs the digital signal.
The method according to claim 1,
The power supply unit,
And a switching mode power supply (SMPS) for supplying power for driving the escalator in response to the control of the intermittent speed and obtaining a stable DC voltage through the rectification and the smoothing circuit. Device.
The method according to claim 1,
Wherein,
And a PLC (programmable logic controller) for digital operation for controlling the escalator.
6. The method of claim 5,
Wherein,
A power supply unit for converting a power input from the outside into a power supply usable in the control unit;
An input unit for receiving a status signal of the escalator or inputting a control signal;
A storage unit for storing various information related to the driving of the escalator;
A CPU for decrypting an input signal from the input unit and various information stored in the storage unit and controlling processing contents; And
And an output unit for outputting the state of the escalator through the CPU.
The method according to claim 1,
Wherein the warning means comprises:
A warning sound generating unit for audibly informing an administrator and a user when a condition that a warning output signal is generated based on the determination information determined by the control means; And
And a warning display generating unit for visually informing an administrator and a user when the condition for generating the warning output signal is satisfied.
delete

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