JP4867626B2 - Man conveyor control device - Google Patents

Description

The present invention relates to a control device for a man conveyor.

As described in Patent Document 1 below, the conventional man conveyor control device includes a human detection means for detecting people near the landing of the man conveyor, and a signal detected by the human detection means. Congestion degree calculating means for calculating the degree of congestion near the landing and speed control means for changing the operating speed of the man conveyor according to the congestion degree calculated by the congestion degree calculating means.

According to the control device for the man conveyor, the people detecting means detects people near the landing of the man conveyor, and the congestion degree calculating means calculates the congestion degree near the getting off for the signal detected by the person detecting means. To do. The speed control means variably controls the operation speed of the man conveyor according to the degree of congestion of people near the landing. As a result, if the degree of congestion near the man conveyor exit is high, the operation speed of the man conveyor is slowed to suppress the inflow of users to the vicinity of the exit and reduce the degree of congestion.
JP-A-10-81480

However, in the control device of the man conveyor, when a person stops near the sensor of the human detection means at the man conveyor landing area, the operation speed of the man conveyor is reduced because it is judged that a large number of passengers are staying. There was a problem that the transportation efficiency was lowered.

The present invention has been made to solve the above-mentioned problems, and prevents erroneous detection of passenger staying at a man conveyor landing area and appropriately detects passenger staying to reduce the operating speed of the man conveyor. An object of the present invention is to provide a control device for a man conveyor.

The control device for the man conveyor according to the first invention is provided with speed control means for making the speed of the motor for driving the man conveyor for carrying passengers variable by driving the inverter, near the landing of the man conveyor, Human detection means for generating a human detection signal by detecting the current, current detection means for detecting a current flowing through the motor to generate a current detection signal, and when the human detection signal exceeds a predetermined reference value A first comparison means for generating a first detection signal; and a second comparison means for generating a second detection signal when the current detection signal exceeds a predetermined reference current signal. The speed is reduced based on the generation of the first and second detection signals.
Accordingly, the speed of the man conveyor can be reduced in consideration of not only the people near the landing of the man conveyor but also passengers on the man conveyor.

The human detection means in the control device for the man conveyor according to the second invention has a projector that generates light and a light receiver that receives the light, and the light received by the light receiver is blocked by detecting the passenger. The first comparison means preferably generates the first detection signal when the light shielding time exceeds a predetermined reference time.
Therefore, since the human detection means uses the projector that generates light and the light receiver that receives the light as sensors, there is no need to use a camera or the like as an area sensor that detects a certain area. Can be configured easily.

The first detecting means in the control device for the man conveyor according to the third aspect of the present invention is characterized in that the first detecting means has integrating means for obtaining the light shielding integrated time obtained by integrating the light shielding time, and the first comparing means is a predetermined time. It is preferable that the first detection signal is generated when the accumulated shading time exceeds a predetermined reference time.
Therefore, the degree of congestion in the vicinity of the exit of the man conveyor is determined based on the accumulated shading time, which is obtained by blocking the light from the projector from passing by a person, so that the accuracy of the degree of congestion is improved.

ADVANTAGE OF THE INVENTION According to this invention, while preventing the misdetection of the stay of the passenger in a man conveyor getting off place, the control apparatus of the man conveyor which detects a passenger's stay appropriately and reduces the operating speed of a man conveyor can be obtained.

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS. 1 is an overall configuration diagram of a man conveyor showing one embodiment of the present invention, FIG. 2 is an overall configuration diagram of a control device for the man conveyor shown in FIG. 1, and FIG. 3 shows an operation of a congestion degree calculator shown in FIG. It is a conceptual diagram.
In FIG. 1, a man conveyor 1 has a handrail 3, a deck board 5, and a large number of circulating steps 7, and includes a lower truss 8 and an upper truss 9 at the entrance. ing. Inside the man conveyor 1 is a control device 55 that controls the driving of a motor 25 as a driving source for driving the step 7 and generates a transportation direction command for the passenger 11 of the man conveyor 1, that is, a descending command or an ascending command. Have.

The control device 55 of the man conveyor 1 detects and controls the converter 21 that rectifies the three-phase AC power source e to generate a DC voltage, converts the DC voltage into a variable voltage variable frequency, and detects the current flowing through the motor 25. And an inverter 23.
The control device 55 includes a detection unit having a sensor, a congestion degree determination unit 32 that generates a first detection signal when the degree of congestion at the exit exceeds a predetermined standard, and a man conveyor based on the detection signal from the sensor. A load determination unit 40 for generating a second detection signal when the load of 1 is estimated to determine whether the load is lighter than a reference load value and exceeds a predetermined reference, and the first and second detections An inverter command unit 55 that generates a second speed command signal lower than the first speed command signal based on the signal and controls the inverter 23 based on a difference between the first or second speed command signal and the speed detection signal; ing.

The detection unit detects a current flowing through the motor 25, and also includes a current sensor 29 as a current detection unit that generates a current detection signal, an encoder 27 that generates a position detection signal by detecting the rotational position of the motor 25, and It is provided in the vicinity of the upper truss 9 of the man conveyor 1 and has a passenger sensor 30 as a person detecting means for detecting the passenger 11 getting in from the lower side and getting off from the upper side. The passenger sensor 30 is a photoelectric type and has a projector 30a that generates light and a light receiver 30b that receives the light.

The congestion degree calculator 32 is predetermined as shown in FIG. 3 and a light blocking time detection unit 32 that detects a light blocking time as a human detection signal when a passenger passes between the projector 30a and the light receiver 30b. The shading time integration unit 34 as an integrating means for obtaining the shading integrated time by integrating the shading times ta to td within the measured time, and whether the shading integrated time is larger than a predetermined reference time value. A first comparison unit 36 as a first comparison unit that determines and generates a first detection signal when larger is included.
The load calculator 40 determines whether or not the current detection signal of the current sensor 29 is greater than a predetermined reference current signal (reference current value), and generates a second detection signal if the current detection signal is larger. As a second comparison unit.

The inverter command unit 55 obtains a speed command signal 60 that generates a speed command signal for the inverter 23, a speed deviation signal that is a difference between the speed detection signal and the speed command signal, and the current command signal for the inverter 23 based on the speed deviation signal. And a speed controller 70 as speed control means for generating
The speed command device 60 includes a first speed command unit 62 that generates a first speed command signal, a second speed command unit 64 that generates a second speed command signal lower than the first speed command signal, and a first speed command. A changeover switch 68 for switching the signal or the second speed command signal, and a changeover unit for generating a command for switching the changeover switch 68 between the first speed command signal and the second speed command signal when the first and second excess signals are generated. 66.

The speed controller 70 includes a speed detector 72 that converts the position detection signal of the encoder 27 into a speed detection signal, a subtracter 74 that generates a speed deviation signal by obtaining a difference between the speed command signal and the speed detection signal, And a current control unit 76 that generates a current command signal from the deviation signal.

The operation of the control device for the man conveyor configured as described above will be described with reference to FIGS. FIG. 4 is a time chart showing the operation of the control device shown in FIG.
Now, assuming that the inverter 25 is controlled by the speed command signal from the speed controller 70 and the motor 25 is driven so that a large number of passengers ride and the man conveyor 1 is operating at the rated speed (step S101), the degree of congestion. The determination device 32 generates light from the projector 30a for people near the landing of the man conveyor 1, and the light receiver 30b receives the light. The light shielding time is detected, and the light shielding time integrating unit 34 integrates the light shielding time to obtain the light shielding integrated time. The first comparison unit 36 generates a first detection signal and inputs the first detection signal to the switching unit 60 because the shading integrated time exceeds a predetermined reference time value (step S103).

The current sensor 29 detects the current flowing through the motor 29 and inputs a current detection signal to the load determination device 40. The second comparison unit of the load determination device 40 determines whether or not the current detection signal exceeds a predetermined reference current value (reference current signal), and since many passengers are on the man conveyor 1, the motor The current flowing through 25 is also large. Therefore, since the current detection signal exceeds the reference current value, the second comparison unit generates the second detection signal and inputs the second detection signal to the switching unit 60 (step S105).

The switching unit 60 inputs the changeover switch 68 to the a side (step S107), and inputs the second speed command signal from the second speed command unit 64 to the subtracter 74 (step S109). On the other hand, the encoder 27 detects the rotational position of the motor 25 and inputs a position detection signal to the speed detection unit 72. The speed detection unit 72 obtains the speed detection signal and inputs the speed detection signal to the subtracter 74. The subtracter 74 obtains a speed deviation signal that is a deviation between the second speed command signal and the speed detection signal, and inputs the speed deviation signal to the current control unit 76. The current control unit 76 obtains a current command signal and gives it to the inverter 23 to decelerate the speed of the motor 25 (step S111).

According to the said embodiment, the speed controller 70 which makes variable the speed of the motor 25 which drives the man conveyor 1 which carries a passenger by driving the inverter 23, and the vicinity of the exit of the man conveyor 1 are provided to detect a person. If the passenger sensor 30 that generates the human detection signal, the current sensor 29 that detects the current flowing through the motor 25 and generates the current detection signal, and the human detection signal exceeds a predetermined reference value, the first The speed controller 70 includes a first comparison unit 36 that generates a detection signal and a second comparison unit 40 that generates a second detection signal when the current detection signal exceeds a predetermined reference current signal. The speed is reduced based on the generation of the first and second detection signals.
Thereby, the speed of the man conveyor 1 can be decelerated in consideration of not only the people in the vicinity of the landing of the man conveyor 1 but also passengers on the man conveyor 1. Therefore, it is possible to prevent erroneous detection of passengers staying at the landing on the man conveyor 1.

According to the above embodiment, the passenger sensor 30 includes the projector 30a that generates light and the light receiver 30b that receives the light, and the light received by the light receiver 30b is blocked by detecting the passenger, The first comparator 36 generates a first detection signal when the light shielding time exceeds a predetermined reference time. Since it is not necessary to use an area sensor, such as a camera, for detecting a certain area as the passenger sensor 30, the passenger sensor 30 can be simply configured.

  The present invention can be applied to a control device for a man conveyor.

1 is an overall configuration diagram of a man conveyor showing an embodiment of the present invention. It is a whole block diagram of the control apparatus of the man conveyor shown in FIG. It is a conceptual diagram which shows operation | movement of the congestion degree calculator shown in FIG. It is a flowchart which shows operation | movement of the control apparatus of the man conveyor of one embodiment of this invention.

Explanation of symbols

1 Man conveyor, 23 Inverter, 25 Motor, 29 Current sensor, 30 Passenger sensor, 30a Light projector, 30b Light receiver, 34 Shading time integration part, 36 1st comparison part, 40 2nd comparison part, 55 Controller, 70 Speed control vessel.

Claims (3)

Speed control means for changing the speed of a motor for driving a man conveyor carrying passengers by inverter driving;
A person detection means provided near the landing of the man conveyor to generate a person detection signal by detecting a person;
Current detection means for detecting a current flowing through the motor and generating a current detection signal;
First comparison means for generating a first detection signal when the human detection signal exceeds a predetermined reference value;
A second comparison means for generating a second detection signal when the current detection signal exceeds a predetermined reference current signal;
The speed control means decelerates the speed based on the generation of the first and second detection signals;
A control device for a man conveyor characterized by the above. The human detection means includes a projector that generates light and a light receiver that receives the light, and the light received by the light receiver is blocked by detecting the passenger,
The first comparison means generates a first detection signal when the light shielding time exceeds a predetermined reference time.
The control device for a man conveyor according to claim 1. The first detecting means has integrating means for obtaining a light shielding integrated time obtained by integrating the light shielding time,
The first comparison means generates a first detection signal when the shading integration time exceeds a predetermined reference time within a predetermined time.
The control device for a man conveyor according to claim 2.

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