JPS63196479A - Floor-reaching detector for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an elevator landing detection device, and particularly to a device for digitally detecting the car position near landing. .

(Prior art) When an elevator touches and stops at an arbitrary floor while it is running, the important factors for performance include riding comfort and the stopping error (hereinafter referred to as landing error) between the car floor and the landing floor. ).
Conventionally, in order to improve these, an elevator using a boat-shaped landing detection plate as shown in FIG. 6 has been considered, and FIG. 7 shows an example of a conventional configuration using the landing detection plate.

In FIG. 7, reference numeral 1 indicates transformers, and AC power supplies 2 and 3 constitute a differential transformer with the landing detection plate 4 as shown in FIG. Further, 5 is a device for detecting the differential voltage of the differential transformer, 6
7 is a landing pattern generator, 7 is a velocity pattern generator,
8 is a pattern switching circuit, and 9 is a motor control device. A landing detection plate 4 is installed on each floor of the hoistway, and differential transformers 2 and 3 are installed on the car, and are set so that the output of the landing pattern becomes zero when the car coincides with the landing floor. .

FIG. 8 shows an example of the pattern output from the landing pattern generator 6 based on the differential voltage detected by the differential voltage detector 5 depending on the position of the car when set in this way, from the start to the top run. The speed pattern up to deceleration running is controlled by the motor according to the speed pattern output from the speed pattern generator 7, and when it approaches landing (A in Fig. 8).
point), the landing pattern generator 6 is activated by the pattern switching circuit.
The landing pattern output by is selected and the motor is controlled. This landing pattern, as shown in Figure 8, precisely detects the car position near landing and occurs so that the speed becomes zero at the landing point, providing good riding comfort and eliminating landing errors. This landing detection device also compensates for landing errors that are small and occur due to the rope stretching due to changes in load.

(Problems to be Solved by the Invention) In the above-mentioned conventional system, the landing plate 4 is attached to all floors so as to fit into the narrow gap between the differential transformers 2 and 3. If it is tilted or bent, the symmetrical output shown in Figure 8 cannot be obtained across all floors, and even if adjustments are made to eliminate floor differences on one floor, errors will still occur on other floors. Yes 1 Installation and adjustment of the landing plate is difficult. Further, as shown in FIG. 6, the landing plate itself has a special shape and therefore tends to vary, making it difficult to adjust the landing on each floor.

Furthermore, since the detection signal is an analog signal, if the speed pattern generator 6 or motor control device 8 processes the digital signal, it is necessary to convert either the landing pattern or the speed pattern signal once. , the circuit becomes complicated.

The purpose of the present invention has been made in view of the above-mentioned drawbacks.The detector uses a light emitter and a light receiver, simplifies installation, reduces floor-to-floor errors, and also digitally processes signals. It is an object of the present invention to provide a landing detection device which is easy to adjust, is low in cost, and can be easily adjusted.

[Structure of the invention]

(Means for solving the problem) A plurality of landing detection plates having predetermined shapes are provided at positions corresponding to each floor in the hoistway, and a plurality of landing detection plates are provided in the elevator car so as to face these landing detection plates. A car position determining means is provided for detecting the position of the elevator car in the vicinity of landing based on the signals from these light detecting means.

(Function) The light detection means outputs a signal to the car position determination means according to the presence or absence of reflected light from the landing detection plate. This car position determination means detects the position of the elevator car near landing based on the signal from the optical detection means.

(Example) An example based on the present invention will be described with reference to the drawings. 1st
The figure shows a configuration diagram of an elevator landing control device according to an embodiment of the present invention.

In FIG. 1, the same parts as in FIG. 7 are given the same reference numerals. 10 is a photodetector, and 11 is a counter.

12 is a car position determination device. Further, the landing detection plate 13 is not shaped like a boat as shown in FIG. 6, but is rectangular and has a triangular shape drawn in black and white on its surface.

A plurality of photodetectors 10 are installed in a car in a horizontal direction, facing the landing detection plate 13, and detect a white portion (portion that reflects light) drawn on the landing detection plate 13.

The counter 11 counts the signal output by the photodetector 10 using the white part, and the landing detection plate 13 indicates that the count is zero when the car matches the floor of the landing, and if the count rises, it is a positive count. , a figure is drawn so that a negative count can be made when the car descends, and a triangular figure is drawn so that the count value is proportional to the car position.

Figure 2 shows the relationship between the count value detected by the photodetector lO and the car position. As can be seen from Figure 2, the count value is proportional to the car position and is calculated as a digital quantity. Ru. Based on this count value, the car position determining device 12 calculates the car position, and the landing pattern generating device 6 calculates the car position.
Then, based on the car position data, a landing pattern suitable for the car position is generated.

Next, the above embodiment will be explained in more detail using the drawings.

FIG. 3 is a block diagram of a landing control device in which the functions of the car position determining device 12, landing pattern generating device 6, speed pattern generating device 7, and pattern switching device 8 shown in FIG. 1 are realized by a microcomputer 14. shows. In Figure 3, 1st
Components that are the same as those in the figure are given the same reference numerals.

A light emitting body 15 such as an LED and a light receiving body 16 such as a phototransistor are connected to the microcomputer 1 that constitutes the photodetector 10.
4 is an input buffer 17, a central processing unit (hereinafter referred to as CPU) 18, and a write-only storage device (hereinafter referred to as ROM)
19, a write/read storage device 1 (hereinafter referred to as RAM) 20, and an output driver 21.

FIG. 4 shows a top view of the landing detection plate 13, the light emitting body 15, and the light receiving body 16. A plurality of photodetectors 10 are arranged horizontally as shown in FIG. 4, and their outputs are input to the counter 11. It is something to do.

In the above configuration, the light output from the light emitter 15 is
The signal is absorbed by the black part of the landing detection plate, reflected by the white part, and inputted to the photoreceptor 16, and the number of signals inputted to the photoreceptor 16 is counted by the counter 11. The microcomputer 14 calculates the speed pattern from start to stop as shown in FIG.
What is the pattern?

A time-based pattern with a constant acceleration in a certain time from point A to point 0, a constant speed pattern from point 0 to point D which is the deceleration point, and a car obtained from a pulse generator from point D to point E. A distance-based pattern for landing the car at landing point B when it reaches the deceleration point depending on the position,
It consists of a landing pattern for aligning the landing position of the car from point E to point B with the floor of the stop floor. This speed pattern is output to the motor control device 9 through the output driver 21, but when the car reaches the landing pattern switching point near landing, the count data is input from the counter 11 via the input buffer 17, and the count data is 6 or more processes of calculating the car position corresponding to , then calculating the landing pattern from the car position data, switching the speed pattern to the landing pattern, and outputting it to the motor control table M9.
The program is pre-written in the ROM,
Arithmetic processing is performed sequentially by the cPU.

It should be noted that the number of photoreceptors 16 of the light emitter 15 increases the resolution of the cage position, and by increasing these numbers, a more accurate cage position can be obtained than that obtained from the conventional pulse generator, and it is possible to obtain a car position that is more accurate up to zero speed. A more compacted implantation pattern is formed.

Further, as an example for realizing the correspondence between the car position and the count value shown in FIG. 2, a pattern diagram of the landing detection plate 13 is used in FIG. 13W is the part that reflects light, 13
B is a part that does not reflect light.

As shown above, since the complicated installation of placing the landing plate in the narrow gap of the differential transformer is eliminated, the installation error of the landing plate on each floor is reduced, and as a result, the landing error on each floor is reduced. Variations can be reduced. Further, since a landing plate as shown in FIG. 5 is used, variations in plate processing are also reduced, which also reduces variations in landing errors. By digitizing the detection of the car position near the landing of the car, it becomes possible to digitally process the landing pattern, which simplifies the circuit and realizes low cost. Further, adjustment is also quite simple by simply adjusting the relative positions of the light emitting body, the light receiving body, and the landing detection plate.

In the above explanation, the light emitter 15, the photoreceptor 16, and the counter 11 are used for detection, but a line sensor in which a plurality of charge-coupled devices (COD) are arranged in a straight line may also be used. Any pattern diagram showing the pattern of the landing detection plate may be used as long as it can detect the position of the heel.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to reduce installation errors of landing plates and landing errors on each floor due to processing errors.

In addition, since the car position near the landing of the car can be detected digitally, the landing pattern can be easily digitally processed, and the circuit is simplified, and the landing detection plate does not have a complicated shape. Realizes low cost. Further, the adjustment can be simplified by simply adjusting the relative position between the landing detection plate and the photodetector.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an elevator landing control device based on the present invention, FIG. 2 is a diagram showing the relationship between the car position and the count value of the counter in FIG. 1, and FIG. 3 is a diagram based on the present invention. FIG. 4 is a diagram showing the relationship between the photodetector shown in FIG. 3 and the landing detection plate, and FIG. A pattern diagram of a detection plate, FIG. 6 is a configuration diagram of a conventional landing detection plate, FIG. 7 is a configuration diagram of a conventional landing detection device, and FIG. 8 is a landing pattern in the configuration of FIG. 7. 9 shows a speed pattern chart of the elevator. 10... Photodetector 12... Car position determination device 13... Landing detection plate Agent Patent attorney Nori Chika Ken Yudo Hirofumi Mitsumata Figure 1 Figure 2 Figure 3 Figure 6 Figure 7 Figure 8

Claims (1)

[Scope of Claims] A plurality of landing detection plates provided at positions corresponding to each floor in a hoistway and having predetermined shapes, and a plurality of landing detection plates provided in an elevator car and irradiating the landing detection plates with light. An elevator landing detection device comprising: a plurality of light detection means that output signals according to the presence or absence of light; and a car position determination means that detects the position of an elevator car near landing based on the signals of these light detection means.