JPH07106868B2 - Elevator passenger detection apparatus and method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an elevator passenger detection apparatus and method for reversing the opening of an elevator passenger before the passenger touches the door being closed. It is a thing.

[Conventional technology]

Generally, an elevator is provided with a safety device that detects an occupant getting in and out of the door before the door is closed or while the door is closed. As a detection method, a safety detection method which is a contact detection means, a detection method using ultrasonic waves, or the like is known, but it detects a person approaching a door when trying to get into a car,
Moreover, as a method for preventing the detection malfunction due to the opening and closing of the door, for example, a method disclosed in Japanese Patent Publication No. 62-14472 has been proposed.

A block diagram of this conventional detection method is shown in FIG. In the figure, (a) is a front view of the elevator, (b) is a top view,
(C) is a side view, (1) is the door of the basket (6),
(2) is the door of the landing, (3) is the safety that detects the contact when the door is closed and opens the reversing door, (4) is the space filter,
(5) is the detection range of the space filter, (7) is the rope,
(8) is a three-sided frame, and (9) is a landing floor.

According to the conventional method, when a person enters the detection range (5), the unevenness of light reflection existing on the surface of the person is passed through a slit array,
It is detected as a pattern, and an output signal having a frequency proportional to the moving speed is output due to the movement of the uneven pattern, and when this signal exceeds a preset value, it is determined as approaching passengers. This space filter is composed of a slit plate, a detecting element, an objective lens, a condenser lens and the like, and a signal level detecting device is composed of an AC amplifier and a comparator.

The signal obtained by this spatial filter is related to the moving speed of the person and the distance to the light source. Since the movement parallel to the slit is not detected, if the slit direction is aligned with the opening / closing direction of the door, detection malfunction due to opening / closing of the door can be prevented.

[Problems to be Solved by the Invention]

Generally, elevator halls are installed under various lighting conditions and outside light conditions.For example, due to the shadow of a person moving around in a place where there is reflection, etc., uneven reflection of light not related to getting on and off the elevator, etc. However, there is a problem that the conventional device cannot be easily adopted because the structure is complicated and expensive.

The present invention has been made to solve the above problems, and can prevent detection malfunction due to opening and closing of a door, can detect a person approaching for getting on and off an elevator, and has a simple structure. It is an object of the present invention to obtain an elevator customer detection device and method capable of obtaining high detection sensitivity.

[Means for Solving the Problems]

An elevator passenger detection apparatus and method according to the present invention are provided in the vicinity of an entrance / exit of an elevator, and have a pair of detection ranges adjacent to each other in a direction orthogonal to a door opening / closing direction, and passengers are detected with respect to these detection ranges. When a device enters or leaves, a pair of detection elements that output signals of opposite polarities are provided, and a detection means that combines the output signals of the pair of detection elements and outputs as a detection signal, and the detection signal And a determination means for determining the approach of passengers.

Further, with respect to a pair of detection ranges that are adjacent to each other in the direction orthogonal to the door opening / closing direction, the passenger's approach or exit is detected as signals of opposite polarities, and these signals are combined and output as a detection signal. It is determined whether the first step and the detection signal output in the first step exceed a preset first level, and the detection signal exceeds the first level. After determining
A second step of determining whether or not the detection signal exceeds a preset second level, and determining that the passenger is approaching when the detection signal exceeds the preset second level. It is a thing.

[Action]

In the elevator passenger detection device and method according to the present invention, the detection means having a pair of detection elements sets a pair of detection ranges adjacent to each other in a direction orthogonal to the opening / closing direction of the door, and passengers enter or leave. At this time, signals of opposite polarities are output, and these output signals are combined and output as a detection signal. Next, the discrimination means not only cancels the influence of the opening and closing of the door by discriminating the approaching of the passenger based on the detection signal, but also increases the signal corresponding to the movement of the person and detects the approaching movement.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an embodiment of a single-opening door, in which (a) is a front view of the elevator as seen from the landing, (b) is a top view,
(C) is a side view. (1) The door of the basket (6),
(2) is a landing door, (8) is a three-sided frame, (10) is a dual pyroelectric infrared detector which is a detection means attached to the door closed side, and (11a) and (11b) are this detector ( It is the detection range in the landing floor (9) created by 10).

FIG. 2 shows an embodiment of a double door, which is shown in FIG.
Is the front view of the elevator seen from the landing, (b) is the top view,
(C) is a side view, (10) is a pyroelectric infrared detector mounted at the center of the doorway, (11c), (11d) are detection ranges in the landing floor created by this detector (10) Is.

FIG. 3 shows the positional relationship in the door opening / closing direction with the dual pyroelectric infrared detector (10) according to the present invention.
Is an example of a single-sided door, (b) is an example of a double-sided door, the arrow indicates the opening / closing direction of the door, (1) is a car door, (2) is a landing door, and (3) is safe. Tyuyu, (10) is a dual pyroelectric infrared detector, (10a),
(10b) shows a pair of pyroelectric infrared detecting elements which constitute a dual pyroelectric infrared detector (10).

FIG. 4 is a circuit diagram of an elevator customer detection device according to the present invention, in which (10) is a dual pyroelectric infrared detector as a detection means, (10a) (10b) (or (10c) (10
d)) is an individual pyroelectric infrared detection element connected in reverse polarity, and (12) amplifies the charge generated in the element and performs impedance conversion. Field effect transistor (FET), (13)
Is an output terminal for outputting an output signal, (14) is an optical lens for obtaining directivity, (15) is an optical filter for detecting the vicinity of a wavelength of 10 μm, (16) and (17) are resistors Rg and Rs, (1
8) is a voltage terminal Vcc, (19) is a ground terminal (GND), (20) is a signal discriminator which is a means for discriminating passengers' approach from the output signal of the dual pyroelectric infrared detector (10), and (21) is It is an output terminal.

FIG. 5 is a characteristic diagram showing the influence of the door when the door is closed. (A) is the case of a single-opening door, and (6) is the case of a double-opening door.

FIG. 6 shows the characteristics due to the movement of a person. (A) shows the case of a single-opening door, and (d) shows the case of a double-opening door.

The operation of the present invention will be described with reference to FIGS. The dual pyroelectric infrared detector (10) can detect the heat energy emitted by the human body, and the optical filter (14) can detect the peak wavelength of human body energy of 10μ.
By detecting the vicinity of m, it is possible to reliably detect the movement of the human body.

Furthermore, if the elevator door is warmed up and emits a wavelength of around 10 μm due to long-term operation, there is a risk of malfunction due to movement of the door when opening and closing the door. Is the door (1),
When (2) closes the door, it passes through the detection ranges (11a) and (11b) at the same time. In other words, a pyroelectric infrared detector (10a),
The amount of infrared rays incident on (10b) changes at about the same amount at the same time. Therefore, the output from the pyroelectric infrared detector (10a) and the output from (10b) are in series and have opposite polarities, which cancel each other out.
As shown in FIG. 5 (a), it becomes lower than the detection signal generation voltage level of the signal discriminator (20). That is, the detector does not malfunction due to the door being closed.

Next, in the double door, when the doors (1) and (2) close, the detection range (11c),
Pass through (11d) at the same time. As a result, the pyroelectric element (10
The amounts of infrared rays incident on c) and (10d) change at the same time by almost the same amount. Therefore, the output of the circuit of FIG. 4 is as shown in FIG. 5 (b) because the output of the pyroelectric infrared detection element (10c) and the output of the pyroelectric infrared detection element (10d) cancel each other. As in the case of a single-door door, the detector does not malfunction due to the door being closed.

The difference between the case of the single-opening door and the case of the double-opening door is that the double-opening door has a larger change amount of the infrared rays incident on the pyroelectric infrared detection element during the door closing, so that the electric charge generated in each element is larger. That is a lot.

Further, by arranging a pair of pyroelectric infrared detecting elements in a direction perpendicular to the opening / closing direction of the door as shown in FIG. 3, an elevator user can detect the detection range (11a) when entering the car. ) → (11b) or (11c) → (11d). The signal detection characteristics of the operation of getting on and off the passengers will be described with reference to FIG. (A) shows the case of a single door and (b) shows the case of a double door. First, when the person who is the heat source enters the detection range (11a) or (11c), this operation causes the pyroelectric infrared detection element (10a). Or, (10c) emits a half-wave signal (positive) and leaves the detection range (11a) or (11c), so that the pyroelectric infrared detection element (10a) or (10c) continues to have the opposite polarity. A half-wave voltage signal (negative) is emitted as shown by the broken line.

On the other hand, this passenger begins to enter the detection range (11b) or (11d) as he approaches the elevator, and the pyroelectric infrared detection element (10b) or (10d) also emits a voltage signal. At this time, the pyroelectric infrared detection element (10a) (10b) or (10c) (10d)
Are connected in series with mutually opposite polarities, so the characteristics of the pyroelectric infrared detection element (10a) or (10c) when a person exits and the pyroelectric infrared detection element (10b) or (10d) The characteristics of the action when a person enters are the same polarity, and the signal of the alternate long and short dash line of the pyroelectric infrared detection element (10b) or (10d) is added to increase the combined signal of the pyroelectric infrared detection element. The output of the dual pyroelectric infrared detector (10) becomes the signal shown by the solid line, and high detection accuracy can be obtained by utilizing the presence of this large signal.

The detection range (11a) (11b) or (11c) (11d) is
By selecting the shapes of the pyroelectric infrared detection elements (10a) to (10d) and the characteristics of the optical lens (14), an arbitrary setting range can be obtained, so a detector (10 It is possible to obtain a safety device that is unlikely to cause a malfunction with a simple configuration in which the above) is provided near the entrance of a car or near the entrance of a hall.

By the way, when the output terminal (13) of the dual pyroelectric infrared detector (10) exceeds the detection signal generating voltage level shown in FIG. 6, the signal discriminator (20) which is the discriminating means generates an output signal, It is possible to determine whether or not the passenger is approaching by determining whether or not this signal is generated by a method such as the example shown in FIG.

That is, when passengers are approaching, the detection range (11
Entering a), it is detected that the level exceeds La (ST
1). Next, the customer detects from the detection range (11a) to the detection range (11a).
When the signal generated by shifting to b) exceeds the level Lb within a predetermined time, it is detected (ST2). Furthermore, after moving to the detection range (11b) and ending, when the signal exceeds the level La is detected (ST3), a re-door opening command (ST4) is issued.

It should be noted that the predetermined time may be selected with a margin because the speed of movement of a person is different, but it does not have to be longer than the time when the door is completely closed. Alternatively, the re-door opening command may be output only when the detection signal first exceeds the level La and then exceeds the level Lb.

With this method, passenger movements can be detected and there is no malfunction,
It is possible to obtain a safety device that can detect a more reliable movement.

Further, the detector is not limited to the heat-sensitive type, but may be another type (using ultrasonic waves, radio waves, light, etc.).

Also, the passenger detection signal levels by the detectors (10a to 10d) have been described by taking La, Lb, Lc, and Ld shown in FIGS. 6 (a) and 6 (b) as examples, but these levels are not shown. It is not limited to the above, but may have a higher level if it has levels Lb and Ld, for example, L1 and L2 in FIGS. 6 (a) and 6 (b). That is, after the detection signal exceeds the level La (or Lc), the level L1
By configuring so as to judge that the passenger is approaching when (or L2) is exceeded, it is possible to perform the detection operation with less malfunction.

〔The invention's effect〕

As described above, according to the present invention, a pair of passenger approach detection means are arranged in a direction perpendicular to the opening / closing direction of the door, and the signals of the detection means are combined in opposite polarities. Since the approach is discriminated, it is possible to prevent detection malfunction due to opening and closing of the door and to obtain high detection sensitivity with a simple configuration.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a single door according to the present invention. (A) is a front view of an elevator, (b) is a top view, (c) is a side view, and FIG. 2 is a view of the present invention. It is a figure which shows one Example in a double door, (a) is a front view of an elevator, (b) is a top view, (c) is a side view, FIG.
(B) is an explanatory view showing a positional relationship between the infrared detector of the present invention and a door opening / closing direction, FIG. 4 is a circuit diagram of an elevator passenger detection device according to an embodiment of the present invention, and FIG. 5 (a).
(B) is a characteristic diagram showing the influence of the door when the door is closed according to the present invention, and FIGS. 6 (a), (b) and 7 are characteristic diagrams for the movement of the person according to the present invention and a flowchart for detecting this movement, FIG. 8 is a view showing a conventional example, (a) is a front view of an elevator,
(B) is a top view and (c) is a side view. (1) and (2) are doors, (10) is a dual pyroelectric infrared detector, (11) is a detector detection range, (12) is a field effect transistor, and (20) is a signal discriminator. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (2)

[Claims] 1. A pair of detection ranges provided adjacent to an entrance / exit of an elevator and adjacent to each other in a direction orthogonal to a door opening / closing direction, and when a passenger enters or leaves the detection range, A pair of detection elements that output signals of opposite polarities are provided, and a detection unit that combines the output signals of the pair of detection elements and outputs as a detection signal, and determines the approach of passengers based on the detection signal. An elevator passenger detection device comprising a discrimination means. 2. A passenger's approach or exit is detected as a signal of opposite polarity to a pair of detection ranges that are adjacent to each other in a direction orthogonal to the door opening / closing direction, and these signals are combined to form a detection signal. And a first step for outputting as the detection signal, and whether the detection signal output in the first step exceeds a preset first level and the detection signal is set to the first level. After determining that the passenger has passed, it is determined whether or not the detection signal exceeds a preset second level, and when it exceeds the second level, it is determined that the passenger is approaching. And a method for detecting a passenger in an elevator, the method including: