JPH10265154A - Door controller of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly detect failure of a sensor to detect a passenger getting on and off a cage of an elevator, especially off failure. SOLUTION: A cage call occurrence detection means 15 detects that a cage call occurs and a cage is stopped in response to the call. When the cage is stopped, a cage door is totally opened, and a door total opening signal 13 is generated. At this time, when a sensor 3 to detect getting on-and-off of a passenger fails, a first sensor failure detection means 16 detects failure of the sensor 3. When the number of times of this failure detection becomes higher than a specified value, a first failure number judgement means 19 judges it as failure of the sensor 3. When this failure judgement number becomes higher than a regulated value, a third sensor failure detection means 20 detects serious failure of the sensor 3, and a door closing speed change-over means 22 changes speed of the cage door to low speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting passengers getting on and off a car of an elevator and controlling opening and closing of a car door.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a front view of an entrance / exit portion showing a conventional elevator door control device disclosed in Japanese Patent Application Laid-Open Publication No. H10-115,878. In the figure, reference numeral 2 denotes a car door that opens and closes the entrance of the car of the elevator, and an infrared detector 3 (details will be described later) is installed above the car door. 4
Is a focusing zone of the infrared detector 3. The conventional elevator door control device is configured as described above,
When a passenger enters the focusing zone 4 when the door is closed, the far-infrared radiation emitted from the human body increases the infrared energy in the focusing zone 4, which is detected and a door opening command is output, The car door 2 is opened upside down.

[0003]

In the conventional elevator door control device as described above, the infrared detector 3 detects infrared rays from passengers. In such a case, it becomes impossible to detect a passenger in the vicinity of the doorway, and there is a problem that an accident occurs in which the passenger collides with or is pinched by the door.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and can reliably detect an off failure of a sensor for detecting a passenger getting on and off a car, thereby preventing an accident that a passenger is pinched by a door. It is an object of the present invention to provide an elevator door control device capable of reducing the load.

[0005]

According to a first aspect of the present invention, there is provided an elevator door control device which detects a failure of a sensor when a car door is fully opened and a sensor for getting on and off does not operate. Things.

Further, the elevator door control device according to the second aspect of the present invention is configured such that when the car stops in response to the call, and the car detection sensor does not detect a passenger even when the car door is fully opened. , And a sensor failure is detected.

The elevator door control device according to the third invention detects the weight of the passenger in the car and detects a change in the detected value. When the car door is fully opened and the change in the detected weight value is detected. Even if it is detected, when the getting-on / off detection sensor does not detect a passenger, a failure of the sensor is detected.

The elevator door control device according to a fourth invention is the elevator door control device according to the second or third invention, wherein a failure of the sensor is determined when the number of times of failure detection of the sensor exceeds a predetermined value. .

The elevator door control device according to a fifth aspect of the present invention is the elevator door control device according to the fourth aspect, wherein a serious failure of the sensor is detected based on a result of the failure determination of the sensor, and the door closing speed of the car door is reduced. It is designed to be switched.

According to a sixth aspect of the present invention, in the elevator door control device according to the fifth aspect of the present invention, when the number of times of detecting a serious failure of the sensor exceeds a prescribed value, a warning request signal of the sensor failure is output. Things.

An elevator door control device according to a seventh invention is the elevator door control device according to the first to sixth inventions, wherein an infrared detector is used as a sensor.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 to 7 show an embodiment of the first, second, fourth and seventh aspects of the present invention. FIG. 1 is an overall configuration diagram, and FIG. 2 is a block diagram of a door control circuit. 3 is an operation flowchart, FIG. 4 is a plan view of an entrance / exit portion of an elevator, FIG. 5 is a front view of FIG. 4, FIG. 6 is a block diagram of an infrared detector, and FIG.
In the drawings, the same reference numerals indicate the same or corresponding parts (the same applies to the following embodiments).

First, the infrared detector will be described with reference to FIGS. 4 and 5, reference numeral 1 denotes a car, 2 denotes a car door, 3 denotes an infrared detector (described later) installed above an entrance of the car 1, and 4 denotes a focusing zone of the infrared detector 3.

In FIG. 6, reference numeral 3 denotes an infrared detector, which is a condenser lens 3 for receiving and condensing infrared rays emitted from passengers.
A, a thermoelectric conversion element 3B for converting infrared energy input from the condenser lens 3A into an electric signal, a band-pass filter operational amplifier 3C including a capacitor C and a resistor R, a comparator 3D having both positive and negative determination levels, and a one-shot timer 3E. Reference numeral 5 denotes a door closing button installed on the operation panel in the car, 6 denotes a door opening / closing control device, and 7 denotes a control panel, which has a CPU 7A, a memory 7B, and an input / output (I / O) port 7C. I /
O) The door opening command 7a and the door closing command 7b are output from the port 7C.

Next, the operation of the infrared detector 3 will be described with reference to FIG. When the passenger passes through the entrance of the elevator, the infrared energy radiated by the passenger in the focusing zone 4 by the focusing lens 3A is focused on the thermoelectric conversion element 3B. Then, an electric signal (A point voltage) corresponding to the collected infrared energy is output. This electric signal is amplified by the band-pass filter operational amplifier 3C via the band-pass filter, and the output (point B voltage) is input to the comparator 3D.

The input point B voltage is compared with predetermined levels VL and -VL by a comparator 3D, converted into a pulse voltage (C point voltage), and input to a one-shot timer 3E. When the detection signal (D point voltage) 3a of the passengers of the "H" level duration 2t ₁ to the control panel 7 from the one-shot timer 3E is output, from this time 2t ₁ interval only the control panel 7 with door open Command 7a is output. That is, when the car door 2 is closed door, a passenger enters the condensing zone 4, the far-infrared rays emitted from the human body, increased infrared energy in the condensing zone 4, the duration 2t ₁ door The opening command 7a is output, and the car door 2 opens the reversing door.

Next, this embodiment will be described.
In FIG. 1, reference numeral 11 denotes an operation panel in a car, and 12 denotes a weighing device for detecting the weight of passengers in the car. 13 is a door full open signal output when the car door 2 is fully opened, 14 is a sensor failure detection circuit,
Reference numeral 5 denotes a car call occurrence detecting means for detecting the occurrence of a car call by a destination button (not shown) of the operation panel 11 in the car.
Reference numeral 6 denotes a first signal for detecting a failure of the sensor 3 from the output of the sensor 3 and the car call occurrence detecting means 15 and the door fully open signal 13.
It is a sensor failure detecting means.

Reference numeral 17 denotes a scale fluctuation detecting means for detecting a fluctuation value based on a signal from the weighing device 12, and 18 detects a failure of the sensor 3 from an output of the sensor 3 and the scale fluctuation detecting means 17 and a signal 13 from the fully open door. Second sensor failure detecting means,
Reference numeral 19 denotes first occurrence number determination means for counting the number of failure occurrences based on failure detection signals from the first and second sensor failure detection means 16 and 18, and 20 denotes first failure number determination means 19
This is a third sensor failure detecting means for detecting a serious failure of the sensor 3 based on a signal from the controller 3 and outputting an alarm request signal 20a to the control panel 7.

Reference numeral 21 denotes second failure frequency judging means for counting the number of times of serious failures of the sensor 3 based on a signal from the third sensor failure detecting means 20, and 22 denotes a signal based on a signal from the third sensor failure detecting means 20. A door closing speed switching unit that outputs a door closing speed switching signal 22a to the door opening / closing control device 6.

In FIG. 2, a power supply 25 is connected to a door motor 27 via a power circuit 26. A pulse encoder 28 is coupled to the door motor 27 and generates a pulse according to the rotation speed of the door motor 27. 29 is a door opening / closing command 7a, 7b from the control panel 7 and the in-car operation panel 11
From the door motor 2 based on the output pulse from the pulse encoder 28 while receiving the button signal 11a from the
7 is a door control circuit for controlling the opening and closing of the car door 2 by generating a torque command value so that the rotation speed of the car 7 is detected and the rotation speed follows the speed command value.

The door control circuit 29 includes a CPU 30, a ROM 31 storing a program to be described later, a RAM 32 for temporarily storing processing data, input data, etc., an input / output port 33, a transmission interface 34, a pulse encoder 2
And a pulse width modulation (PMW) signal generating pulse-width modulation (PMW) signal.
It has a unit.

The transmission interface 34 receives the door opening / closing commands 7a and 7b from the control panel 7 and outputs a report request signal 20a. Also, a button signal 11a is input from the operation panel 11 in the car. I / O port 33 is sensor 3
And a signal from the weighing device 12 and a door fully open signal 13 are input. A gate signal generation circuit 37 generates a gate signal based on the PWM signal transmitted from the PWM unit 36 and transmits the gate signal to the power circuit 26.

Next, the operation of this embodiment will be described with reference to FIG. In step S1, it is determined whether a car call has occurred based on the button signal 11a from the in-car operation panel 11. If a car call has occurred, the process proceeds to step S2, and if not, the process jumps to step S3. In step S2, it waits for the car 1 to stop in response to the car call. When the car 1 stops, in step S3, it waits for the input of the door fully open signal 13, that is, for the car door 2 to fully open. When the car door 2 is fully opened, it is determined in step S4 whether the sensor 3 has operated.

That is, if the car 1 stops in response to the car call and the door is fully opened, or if the car 1 does not respond to the car call (responds to the hall call) and stops and the door is fully opened, the car 1
It is considered that passenger movement occurs between the platform and the landing. Therefore, when the sensor 3 operates, it is determined that the sensor 3 is normal, and the process proceeds to step S6 to clear the sensor off failure counter. If sensor 3 did not work,
Is determined to be abnormal, and the sensor-off failure counter is incremented in step S5.

In step S7, it is determined whether the count value of the sensor-off fault counter is equal to or greater than a predetermined number (here, three times). If the count value is equal to or greater than the predetermined number, the sensor-off fault signal is sent to the third sensor fault detection means 20 in step S9. Is output. If it is less than the predetermined value, a sensor normal signal or a sensor return signal is output to the third sensor failure detecting means 20 in step S8. Here, step S1 is the car call occurrence detecting means 1
5, steps S1 to S5 are performed by the first failure detecting means 16;
Steps S7 and S9 correspond to the first failure frequency determination means 19.

In this way, when the sensor 3 does not operate even if the car stops in response to the call and opens, the sensor 3 is determined to be faulty. Off faults can be detected.

Embodiment 2 FIG. 8 to 10 are views showing an embodiment of the first, third, fourth and seventh aspects of the present invention. FIG. 8 is an operation flowchart, and FIGS. 9 and 10 are operation flowcharts. 1 and 2 and FIGS. 4 to 7 are also used in the second embodiment. Next, the operation of this embodiment will be described with reference to FIG. In step S11, the control waits for the input of the door fully open signal 13, that is, for the car door 2 to be fully opened. When the car door 2 is fully opened, in step S12 the weighing device 1
It is determined whether or not a balance change has occurred due to the input from Step 2. If there is no scale change, the process ends.
Proceed to 13.

In step S13, a predetermined time T after the scale is changed
It is determined whether the sensor 3 has operated within (for example, one second). If the sensor 3 operates, the process proceeds to step S16, and if not, the process proceeds to step S14. In step S14, it is determined whether or not the sensor 3 has operated within a predetermined time T (for example, 1 second) before the time when the scale changes, and if the sensor 3 operates, the process proceeds to step S16.
If not, the process proceeds to step S15.

That is, when the scale fluctuation occurs, it is considered that passengers get on and off. When the sensor 3 operates after the scale change, it indicates that the movement of the passenger from the car to the hall has occurred. When the sensor 3 operates before the time of the scale change, the movement of the passenger from the hall to the car has occurred. Indicates that an error has occurred. This state is shown in FIG. 9 and FIG. FIG. 9 shows that the car door 2 is fully opened at time t ₁ , a passenger moves from the inside of the car to the landing at time t ₂ , and the sensor 3 operates at time t ₃ within a predetermined time T from time t _2. Is shown.

Further, FIG 10 is fully open the car door at the time t _4, at time t ₅ when the movement from the landing of passengers into the car occurs, the time t ₅ at time t ₆ earlier in the predetermined time T This indicates that the sensor 3 has operated. 9 and 10
Are the same, but may be different. Subsequent processing steps S15 to S19 correspond to steps S5 to S5 in FIG.
Since it is the same as S9, the description is omitted. Here, steps S11 to S15 are performed by the second failure detecting means 18, step S12 is performed by the scale fluctuation detecting means 17, and steps S17 and S15 are performed.
19 corresponds to the first failure frequency determination means 21.

In this way, after the car door 2 is fully opened,
When the sensor 3 does not operate even if the balance changes due to the getting on and off of the passenger, the sensor 3 is determined to be faulty, so that the fault of the sensor 3, especially the off fault can be detected.

Embodiment 3 FIG. FIG. 11 shows the fifth to fifth embodiments of the present invention.
It is an operation | movement flowchart which shows one Embodiment of 7th invention. 1 to 10 are also used in the third embodiment.
Next, the operation of this embodiment will be described with reference to FIG. First, in step S21, the first failure frequency determination means 19
Judge whether there is an input of the OFF failure signal of the sensor 3 from
If there is an input, the process proceeds to step S22; otherwise, the process proceeds to step S26.

In step S22, the sensor serious off fault counter is incremented. Then, step S23
To make the door closing speed low with respect to the door closing speed switching means 22. Outputs low-speed mode request signal. In step S24, it is determined whether the count value of the sensor serious off failure counter is equal to or more than a specified number (for example, three times). If the number is less than the predetermined number, the process ends. If the number is more than the predetermined number, the process proceeds to step S25, and the third sensor failure detection means 20 outputs a notification request signal 20a to the control panel 7.

In step S26, a normal mode request signal is output to the door closing speed switching means 22 so as to open and close the door normally, assuming that the sensor 3 has not failed or has recovered from the failure. The door closing speed switching means 22 outputs a door closing speed switching signal 22a based on the low speed mode request signal or the normal mode request signal, and controls the door motor 27 via the PWM unit 36, the gate signal generation circuit 37 and the power circuit 26. .

Here, steps S21 and S22 correspond to the third sensor failure detecting means 20, step S23 corresponds to the door closing speed switching means 22, and steps S24 and S25 correspond to the first failure number judging means 21. In this manner, when the sensor 3 is out of order, it is dangerous for a passenger to close the door at the normal door closing speed. Therefore, the door closing speed is reduced, and the sensor 3 generates many times. If so, sensor 3
Is determined to be a serious failure, and the fact is reported to a maintenance company or the like.

[0036]

As described above, according to the first aspect of the present invention, when the car door is fully opened and the getting-on / off detection sensor does not detect a passenger, the sensor failure is detected. An off fault can be detected.

According to the second aspect of the present invention, when the car is detected to have stopped in response to the call and the door detection sensor does not detect a passenger even if the door is fully opened, a failure of the sensor is detected. As a result, the same effects as those of the first invention are obtained.

According to the third aspect of the present invention, the change in the detected value is detected by detecting the weight of the passenger in the car, and even if the car door is fully opened and the change in the detected weight value is detected, the getting on / off detection is performed. When the sensor does not detect a passenger, a failure of the sensor is detected. In addition to the effect of the first invention, a more accurate failure detection can be performed by utilizing a change in the detected weight of the passenger. Can be.

According to the fourth aspect of the present invention, when the number of times of detection of the sensor failure exceeds a predetermined value, it is determined that the sensor has failed. In addition to the effects of the second or third aspect, the accuracy of the failure determination is increased. be able to.

In the fifth invention, a serious failure of the sensor is detected based on the result of the failure determination of the sensor, and the closing speed of the car door is switched to a low speed. Accidents in which passengers are caught in the door can be reduced.

According to the sixth aspect of the present invention, when the number of times of detection of a serious failure of the sensor exceeds a specified value, the sensor failure notification request signal is output. Therefore, in addition to the effect of the fifth aspect, the sensor failure is maintained. It can be reported to the company.

Further, in the seventh invention, since the infrared detector is used as the sensor, in addition to the effects of the first to sixth inventions, the passage of a human body can be detected accurately.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram of a door control circuit according to the first embodiment of the present invention.

FIG. 3 is an operation flowchart showing the first embodiment of the present invention.

FIG. 4 is a plan view of an entrance / exit portion of the elevator showing the first embodiment of the present invention.

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a block diagram of the infrared detector of FIG. 4;

FIG. 7 is an operation explanatory diagram of the infrared detector of FIG. 4;

FIG. 8 is an operation flowchart showing a second embodiment of the present invention.

FIG. 9 is an operation flowchart showing Embodiment 2 of the present invention.

FIG. 10 is an operation flowchart showing a second embodiment of the present invention.

FIG. 11 is an operation flowchart showing a third embodiment of the present invention.

FIG. 12 is a front view of an entrance / exit portion of an elevator showing a conventional elevator door control device.

[Explanation of symbols]

1 car, 2 car doors, 3 infrared detectors, 4 focusing zones, 12 weighing devices, 13 fully open signals, 15 car call occurrence detection means, 16 failure detection means / first failure detection means (first sensor failure detection means ), 17 scale fluctuation detection means, 18 failure detection means / second failure detection means (second sensor failure detection means), 19 first failure frequency determination means, 20
Third failure detection means (third sensor failure detection means), 21
Second failure frequency determination means, 22 door closing speed switching means, 2
7 door mode, 29 door control circuit, S1 car call occurrence detecting means, S1 to S5 first failure detecting means, S7,
S9, S17, S19 First failure frequency determination means, S11
S15 second failure detection means, S12 scale fluctuation detection means, S21, S22 third failure detection means, S23 door closing speed switching means, S24, S25 second failure frequency determination means.

Claims (7)

[Claims] 1. An apparatus for installing a sensor for detecting a passenger getting on and off a car and controlling the opening and closing of the car door in accordance with the operation of the sensor, wherein the sensor is not operated when the car door is fully opened and the sensor does not operate. A door control device for an elevator, comprising: a failure detecting means for detecting a failure of the elevator. 2. A device for installing a sensor for detecting a passenger getting on and off a car and controlling opening and closing of the car door in accordance with the operation of the sensor, wherein the car detects that the car has stopped in response to a call. Call occurrence detection means, and first failure detection means for detecting a failure of the sensor when the sensor does not operate even when the car is stopped and the car door is fully opened. Elevator door control device. 3. A device for installing a sensor for detecting passengers getting on and off the car, and for controlling the opening and closing of the car door according to the operation of the sensor, a weighing device for detecting the weight of the passengers in the car is installed. A scale fluctuation detecting means for detecting that the detection value of the weighing device has changed, and the sensor when the sensor does not operate even when the car door is fully opened and a change in the detection value of the weighing device is detected. And a second failure detecting means for detecting a failure of the elevator. 4. The system according to claim 2, further comprising a first failure frequency judging means for judging that the sensor has failed when the number of operations of the first or second failure detecting means exceeds a predetermined value. Elevator door control device. 5. A third failure detection means for detecting a serious failure of the sensor based on an output of the first failure frequency determination means, and switching a door closing speed of the car door to a low speed when a serious failure of the sensor is detected. 5. The elevator door control device according to claim 4, further comprising door closing speed switching means. 6. An elevator according to claim 5, further comprising a second failure frequency judging means for outputting a sensor failure alarm request signal when the number of operations of the third failure detecting means exceeds a prescribed value. Door control device. 7. The sensor according to claim 1, wherein the sensor uses an infrared detector that receives infrared rays emitted from the passenger and detects the passenger. Elevator door control.