JPH0781860A - Positioning device for elevator - Google Patents

Abstract

PURPOSE:To enable operation to be restarted quickly without requiring the dummy run for resetting a reference position at the restart of operation even if the power of a CPU and memories is shut off by a power outage, etc., and their contents are reset by specifying the current position of an elevator car as an absolute value. CONSTITUTION:Reflecting plates 23, each of which comprises a combination of an intense reflecting surface and a weak reflecting surface, are provided in a plurality of predetermined positions in an elevator shaft 15. An optical detection system 21 provided in a car 1 reads information about the positions of the reflecting plates 23 and feeds it to the input circuit 22-3 of a position specifying device 22. A CPU 22-1 compares a signal of the input circuit 22-3 with data stored in a ROM in a memory 22-2, thus specifying the current position of the car 1 as an absolute value. Then the CPU 22-1 sends a command to position the cage 1 to an output circuit 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position detecting device for an elevator, and more particularly to a position detecting device for detecting the current position of the elevator in absolute value.

[0002]

2. Description of the Related Art FIG.
It is a block diagram which shows the structure of the conventional elevator position detection apparatus shown by the 9th publication. In the figure, 1 is an elevator car, 2 is a position detection switch attached to the elevator car 1, 3 is a dog installed in an elevator hoistway (not shown), and 4 is provided outside the elevator car 1. The signal converter converts the analog signal from the position detection switch 2 into a digital signal and transfers the digital signal to the central processing unit (CPU) 5 via the bus 6. 7
Is a rope for suspending and raising and lowering the elevator car 1.

FIG. 11 is a block diagram showing the operation of the conventional position detection switch 2 shown in FIG.
a is a case, 2b is a support, 8 is a spring whose one end is supported by the support 2b, 9 is a contact provided at the other end of the spring 8, 10 is a pressing arm, 11 is one end supported by the case 2a. On the other end, a connecting arm having a wheel 12 attached thereto, and 13 are lead wires for transmitting a position detection signal to the converter 4.

Next, the operation of the above-described conventional elevator position detecting device will be described with reference to FIGS. When the elevator car 1 moves and approaches Dog 3,
The wheel 12 rides on the dog 3, the pressing arm 10 is pushed up via the connecting arm 11, and the contacts 9 contact each other.
As a result, the position detection switch 2 outputs a signal of level H to the converter 4, for example. Further, when the elevator car 1 further moves and the position detection switch 2 leaves the dog 3, the wheel 12 returns to its original position by the force of the spring 8 and the contact 9 opens, whereby the position detection switch 2 is opened. , For example,
The signal of level L is output to the converter 4. And CPU
5 is a signal from the converter 4 (for example, the position detection switch 2
Corresponding to the signal of level H of level "1"),
Recognizing that the car 1 has reached a predetermined position on the hoistway, the subsequent positioning control of the car 1 is executed.

The hoistway has a plurality of predetermined positions to be positioned, and the same dog as the dog 3 is installed at each predetermined position. That is, the signals generated by the contact between the dog and the position detection switch 2 at each predetermined position are the same. Therefore, when moving the car 1 from one predetermined position to the next predetermined position, the CPU 5 causes the operation state of the car 1 (for example, upper
The current position of the car 1 is specified from the combination of the downward movement direction and the number of contact times of the dog and the position detection switch 2) and the relationship with the next predetermined position (that is, in which direction, Move the car 1 after checking whether it is in the position of the second dog. Since the operating state of the car 1 described above is stored in the memory device (not shown), if the stored contents and the current value of the car 1 deviate due to a power failure after the operation of the elevator, before the operation is restarted. It is necessary to carry out preliminary operation for position confirmation.

[0006]

In the conventional elevator position detecting device, since the position detecting dogs provided at a plurality of predetermined positions of the hoistway are all the same, the dog and the position detecting switch 2 are brought into contact with each other. The signals generated by the above are all the same, and the predetermined position of the hoistway cannot be specified only by the signals. Therefore, when positioning the car 1 at a predetermined position, the current value is specified as a relative position from the reference position determined when the elevator is started, and the direction and distance of the next predetermined position from the current value are determined. It was necessary to calculate. Therefore, when the power of the CPU 5 or the memory device is once cut off due to a power failure or the like, all the information stored for specifying the current value is lost, and a preliminary operation for resetting the reference position is required when the operation is restarted. Therefore, an extra operation of setting a reference position for positioning was necessary.

The present invention has been made to solve the above problems, and it is not necessary to specify the position of the car to be positioned as a relative position from the reference position and calculate the direction and distance to move. Also, even if the power of the CPU or memory device is cut off due to a power failure or the like and their contents are reset, it is possible to restart quickly without the need for preliminary operation to reset the reference position when restarting the operation. The purpose of the present invention is to obtain an elevator position detecting device.

[0008]

In the position detecting device for an elevator according to the present invention, a plurality of points in the hoistway are
A position information body having unique information is provided at each position, and a detecting unit that faces the position information body and detects information of the position information body is provided on a moving body that moves up and down in the hoistway. The position specifying means for specifying the position of the moving body by the signal is provided.

The detecting means is a non-contact detecting means such as an optical type or a magnetic type.

[0010]

In the position detecting device for an elevator according to the present invention, the detecting means provided on the moving body detects the position information unique to each position from the position information bodies provided at a plurality of positions on the hoistway. Then, the position specifying means specifies the position of the moving body based on this detection signal.

Further, the non-contact type detecting means such as the optical type or the magnetic type detects the position information peculiar to each position without making contact.

[0012]

【Example】

Example 1. 1 to 4 show a non-contact and optical elevator position detecting device according to an embodiment of the present invention.
4 is an operation explanatory view of an elevator position detection device, FIG. 2 is a configuration diagram of an optical detection device which is a detection means, FIG. 3 is a configuration diagram of a light reflection plate which is a position information body, FIG.
6 is a flowchart showing the operation of the position specifying device which is the position specifying means. In the figure, FIG.
The same symbols as those shown in indicate the same or corresponding parts,
Reference numeral 15 is a hoistway, 16 is a counterweight, 17 is a sheave for a hoisting machine, 21 is an optical detection device, and a plurality of light emitting elements 30 (30a to 30d) such as laser diodes are arranged in line as shown in FIG. Further, the light receiving elements 31 (31a to 31d) such as photodiodes, which receive the light returned from the light reflecting plate, which is reflected from the light emitting element 30 described later, are aligned at positions corresponding to the light emitting elements 30 (30a to 30d). It is arranged. Reference numeral 22 denotes a position specifying device, an input circuit 22-3 that receives position information from the optical detection device 21, and a memory 22-2 having a ROM that stores a correspondence table that correlates the position information with a predetermined position of the hoistway 15. , Input circuit 22-
3 and the information from the memory 22-2 are compared and operated by the CPU 22-1. Reference numeral 23 is a light reflection plate provided at a predetermined position of the hoistway and having unique information at each position, and a plurality of light reflection plates (23a to 23n) are provided. For example, as shown in FIG. 3A, the light reflection plate 23f includes a strong reflection surface A that reflects light well and a weak reflection surface B that hardly reflects light.
As shown in FIG. 3B, the light reflecting plate 23e has a combination of the strong reflecting surface A and the weak reflecting surface B different from that of the light reflecting plate 23f. Further, other than the light reflection plates (23e, 23f) (23
a to 23n), the combination of the strong reflection surface A and the weak reflection surface B is different from the combination of the other light reflection plates. Here, the strong reflection surface A is, for example, made of metal, glass or the like, and is made into a state in which those surfaces are mirror-finished so as to reflect light well.
For example, in addition to metal and glass, concrete and plastics are used, and the surface is roughened to cause irregular reflection, or painted black, so that almost no light is reflected and it does not return. It is a thing. 24 is CP
An output circuit which receives an output from U22-1 and sends a control signal to a control device (not shown) for positioning and controlling a hoist (not shown) that drives a hoisting sheave 17 for raising and lowering the car 1. Is. Reference numeral 25 is a signal cable for sending a signal from the optical detection device 21 to the input circuit 22-3.

The operation of the elevator position detecting device shown in FIGS. 1 to 4 will now be described. When the car 1 rises from the bottom and the optical detection device 21 just comes to a position facing the light reflection plate 23f, the optical detection device 21
The light emitted from the light emitting elements 30a to 30d is reflected by the light reflecting plate 23f and returns to the light receiving elements 31a to 31d. From here, it demonstrates based on the flowchart of FIG. In step S1, the optical detection device 21 identifies the intensity of the reflected light input to the light receiving elements 31a to 31d, and, for example, a signal "strong", b signal "strong", c signal "strong", d.
The signal “weak” is sent to the input circuit 22-3. In the input circuit 22-3, the signals a to d are converted into "0111" by using the signal that the CPU 22-1 understands, for example, the lower bit as the a signal. However, if the signal from the optical detection device 21 is already equivalent to the output signal of the input circuit 22-3, the input circuit 22-3 can be omitted. Next, in step S2, the CPU 22-1 reads the R in the memory 22-2.
Call the correspondence table stored in the OM. And step S
At 3, the comparison is made with the signal "0111" from the input circuit 22-3. If they do not match, the values in the correspondence table stored in the ROM are sequentially fetched and the comparison is continued. If they match, for example, assuming that "0111" is defined as "7th floor" in the correspondence table, the CPU 22-1 identifies a position of the light reflection plate 23f as a position corresponding to "7th floor" and identifies the position. To do. Next, in step S4, the CPU 22-1 outputs a signal (for example, "7" from a positioning command device (not shown)).
(Stop to the floor) and the position specified above are compared, and if they match, a command to move the car 1 is sent to the output circuit 24. Here, if the signal from the positioning command device (not shown) and the specified position do not match, it is determined whether the signal is rising or falling depending on the magnitude relationship between the two signals, and the position where the two signals match is determined. Cage 1 to detect
Drive up or down. In the case of the light reflection plate 23e, the output of the optical detection device 21 becomes a signal "weak", b signal "strong", c signal "strong", d signal "weak". In this case, the input circuit 22 The output from -3 is "01
10 ". Therefore, in this case, it is defined as "sixth floor" in relation to the above-mentioned light reflection plate 23f.

In this way, the light reflecting plates (23a-2
3n) is the information obtained by the intensity of the reflected light from car 3 and the position of car 1 can be specified in absolute value, and the position of car 1 is stored as a relative position from a certain reference position as in the conventional case. There is no need to keep it. This means that even if the contents of the memory 22-2 (other than the ROM) are lost due to a power failure or the like, the preliminary operation of setting the reference position and specifying the current position of the car 1 when the operation is restarted becomes unnecessary, and the operation is quick. The operation can be restarted.

Example 2. This embodiment corresponds to the above-mentioned embodiment 1.
In place of the non-contact and optical elevator position detecting device in (1), a position detecting device using a combination of a contact type position detecting switch and a dog is used, which will be described with reference to FIGS. 1, 5 and 6. FIG. 5 is a layout view of four contact-type position detection switches, and FIG. 6 is a layout view of dogs arranged at intervals corresponding to the four contact-type position detection switches of FIG. In the figure, the same reference numerals as those shown in FIGS. 10 and 11 denote the same or corresponding portions, and 41 denotes four position detection switches 2 (41a to 41d) shown in FIG.
A contact-type detection device, which is a set of detection means, is provided in the car 1 instead of the optical detection device 21 of the first embodiment. 43e and 43f are formed by combining four dogs 3 shown in FIG. 11 to form dogs 43f-a to 43f.
-D, 43e-a to 43e-d is a combination dog plate which is a position information body in one set.
Is provided in the hoistway 15 instead of the light reflection plate 23, and a plurality of combined dog plates 43a to 43n are provided at predetermined locations in the hoistway 15. Here, the dogs 43f-d, 43e-a shown in FIGS.
43e-d shows the case where dog 3 does not exist.

Next, the operation of the contact type position detecting device will be described. When the car 1 moves and the contact type detection device 41 comes into contact with the combined dog plate 43f and rides on it, the dogs 43f-a, 43f-b, 43f- where the dog 3 is present.
Position detection switches 41a, 41b, 41c corresponding to c
Is the signal of level H, the dog 43 without the dog 3
The signal of the position detection switch 41d corresponding to f-d becomes a signal of level L. This signal corresponds to the output signal of the optical detection device 21 with respect to the light reflection plate 23f in the first embodiment, that is, a signal "strong", b signal "strong", c signal "strong", d signal "weak". However, the same effect as that of the first embodiment can be obtained. Further, in the case of the combination dog plate 43e, the position detection switches 41a, 41b, 41c, 41d become the level L, the level H, the level H, the level L, respectively, and the output of the optical detection device 21 with respect to the light reflection plate 23e of the first embodiment. The one corresponding to the signal is obtained.

Thus, the combination dog plates to 43
The current position of the car 1 can be specified in absolute value by the information obtained by the contact between the contact detection device 41 and e, 43f-, and the same effect as that of the first embodiment can be obtained.

Example 3. This embodiment corresponds to the above-mentioned embodiment 1.
A magnetic type position detecting device is used in place of the optical type position detecting device in FIG. 1, which will be described with reference to FIGS. 1, 7, and 8. FIG. 7 shows a plurality of thin plate-shaped permanent magnets 54-1 to 54-54.
-5 is a configuration diagram of a magnet plate arranged on a non-magnetic plate, and FIG. 8 is an operation explanatory diagram of the magnetic flux detection device. 51
Is a magnetic flux detecting device provided with a Hall element (not shown) that collects magnetic flux and obtains an output proportional to the magnetic flux density (B), and is provided in the car 1 instead of the optical detecting device 21 of the first embodiment. It is a thing. Reference numeral 52 is a void for passing a magnet plate, which will be described later, and 53e and 53f are thin plate permanent magnets 54-1 to 54-1.
Align 54-5 on a non-magnetic plate and
A magnet plate, which is a set position information body, is provided in the hoistway 15 instead of the light reflection plates 23e and 23f of the first embodiment. A plurality of magnet plates 53e, 53f provided at predetermined locations in the hoistway 15.
Have different numbers of thin plate-shaped permanent magnets 54 and different amounts of magnetic flux generated. For example, the magnet plate 53e
Has four thin plate-shaped permanent magnets 54 and five magnet plates 53f.
The magnet plate 53f generates more magnetic flux.

Next, the operation of the magnetic type position detecting device will be described. When the car 1 moves and the magnet plate 53f starts to enter the space 52 of the magnetic flux detecting device 51, the magnetic flux generated by the permanent magnets 54-1 to 54-5 is generated by the magnetic flux detecting device 5.
1, the magnetic flux density (B) having a strength proportional to the total magnetic flux of the permanent magnet is detected by a magnetic detection element (not shown) such as a Hall element. The output of the magnetic detection element, that is, the output of the magnetic flux detection device 51 shows a maximum value when the void portion 52 of the magnetic flux detection device 51 completely encloses the magnet plate 53f. Since this magnetic flux detection device 51 has a peak hold circuit (not shown), this maximum value is sent to the input circuit 22-3 where it is A / D converted and processed by the CPU 22-1. Becomes Since the magnet plate 53e has one magnet less than the magnet plate 53f, the maximum value when the magnetic plate 53e is detected by the magnetic flux detection device 51 is the maximum value in the case of the magnet plate 53f. It becomes almost 4/5 of the value. In this way, even with respect to the plurality of magnet plates to 53e and 53f provided at the predetermined positions of the hoistway 15, the maximum values corresponding to those magnet plates become slightly different values. Therefore, the ROM in the memory 22-2 stores a correspondence table to which floor these different maximum values correspond. Therefore, the CPU 22-1 uses the input circuit 22-3.
Of the car 1 and the correspondence table stored in the ROM in the memory 22-2 can be compared to specify the current position of the car 1.

The value of the peak hold circuit (not shown) of the magnetic flux detecting device 51 is almost zero when the magnetic flux detecting device 51 does not face the magnet plates 53e and 53f. It will be reset at this time.

Thus, the magnet plates to 53e, 53
Based on the information obtained by combining f and the magnetic flux detection device 51, the current position of the car 1 can be specified as an absolute value, and the same effect as that of the first embodiment can be obtained.

Further, in this embodiment, the magnet plate 53 is used.
Although thin plate-shaped permanent magnets 54-1 to 54-5 were used for e and 53f, a plate was used as a magnetic body, a coil was wound around this, and an electric current was passed through to form an electromagnet. It is also possible to make it slightly different.

Example 4. This embodiment corresponds to the above-mentioned embodiment 1.
In place of the combination of the light reflection plate having the strong reflection surface and the weak reflection surface and the optical detection device in, the distance between them is measured by the combination of the reflection plate and the ultrasonic detection device, and the current position of the car is determined. This is to be specified and will be described with reference to FIG. FIG. 9 is an operation explanatory view using the ultrasonic position detecting device, and the same reference numerals indicate the same or corresponding parts. Reference numeral 61 denotes an ultrasonic wave detecting device, which includes a portion (not shown) for transmitting an ultrasonic wave and a portion (not shown) for receiving the reflected ultrasonic wave, and the transmitted ultrasonic wave is a reflection plate described later. It includes a counting circuit (not shown) for measuring the time required for the signal to be reflected back to and received. Reference numeral 63 is a reflector provided in the hoistway 15, and includes a plurality of reflectors, for example, reflectors 63d,
The distances 63e and 63f are different from the distances ld, le, and lf from the ultrasonic detection device 61, respectively. Here, these distances ld, le, and lf are set to values that can be distinguished by the counting circuit of the ultrasonic detection device 61.

Next, the position specifying operation using the ultrasonic detecting device 61 will be described. The ultrasonic detection device 61 constantly transmits and receives ultrasonic waves and measures the time between the transmission and reception. When the ultrasonic detecting device 61 faces the wall of the hoistway 15, the measured time is large and shows a substantially constant value. Therefore, it is assumed that the reflector 63 is not provided while this value is being measured. recognize. When the car 1 moves and faces the reflector 63f, the time between transmission and reception measured by the ultrasonic wave detection device 61 has a small value corresponding to the distance lf. The analog voltage value corresponding to this time is sent to the input circuit 22-3 in the position specifying means 22, where the A / D is performed.
The converted signal becomes a signal that can be processed by the CPU 22-1. Now, in the case of the reflectors 63e and 63d, the distance is 1
e and ld are large, the time between transmission and reception measured by the ultrasonic detection device 61 when facing these reflectors is approximately le / l compared to the reflector 63f.
f times and ld / lf times as large. In this way, a plurality of reflectors 63d to 63d provided at predetermined positions of the hoistway 15,
Also for 63e and 63f-, the measured transmission / reception times have slightly different values, and the analog voltage values corresponding to these times also have slightly different values. Then, the ROM in the memory 22-2 stores a correspondence table indicating which floor these different time values correspond to. Therefore, the CPU 22-1 outputs the output of the input circuit 22-3 and the memory 22-2. The current position of the car 1 can be specified by comparing the correspondence tables stored in the ROM therein.

In this way, the reflectors 63d, 63e, 6
The information obtained by combining 3f and the ultrasonic detecting device 61 can specify the current position of the car 1 in absolute position, and the same effect as that of the first embodiment can be obtained.

Further, in this embodiment, the distance between the reflector and the reflector is specified by measuring the time between the transmission and reception of ultrasonic waves by using the ultrasonic detecting device. It is also possible to specify the distance to the reflector by measuring the time between light transmission and reception using an optical detection device as described above.

By the way, in the above description, the car of the embodiment of the present invention is provided with the optical detecting device, the contact detecting device, the magnetic flux detecting device, or the ultrasonic detecting device. It is also possible to provide it as a counterweight. In this case, it is necessary to correct only the difference between the balance weight and the position of the car for position control.

[0028]

Since the present invention is constructed as described above, it has the following effects.

The detection means provided on the moving body detects the position information unique to each position from the position information bodies provided at a plurality of positions on the hoistway, and the position specifying means causes the position specifying means to move the moving body. Since the position of the moving body can be specified in absolute value, even if the contents of the memory are lost due to a power outage or the like, the preliminary operation for setting the reference position when restarting the operation becomes unnecessary, The operation can be restarted quickly.

Further, if the detecting means provided on the moving body is made to detect the position information peculiar to each position from the position information bodies provided at a plurality of positions of the hoistway without contact, A highly reliable detection device can be obtained because frequent maintenance is not required for the worn portion.

[Brief description of drawings]

FIG. 1 is an operation explanatory view of an elevator position detection device showing Embodiments 1, 2, and 3 of the present invention.

FIG. 2 is a configuration diagram of an optical detection device according to a first embodiment of the present invention.

FIG. 3 is a configuration diagram of a light reflecting plate according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing an operation of the position identifying device according to the first embodiment of the present invention.

FIG. 5 is a layout view of a contact type position detection switch according to a second embodiment of the present invention.

FIG. 6 is a layout view of dogs according to a second embodiment of the present invention.

FIG. 7 is a configuration diagram of a magnet plate according to a third embodiment of the present invention.

FIG. 8 is an operation explanatory view of the magnetic flux detection device according to the third embodiment of the present invention.

FIG. 9 is an operation explanatory diagram of the ultrasonic position detecting device according to the fourth embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a conventional elevator position detection device.

FIG. 11 is a configuration diagram showing an operation of a conventional elevator position detection switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 elevator car 15 hoistway 16 counterweight 21 optical detection device 22 position identification device 22-1 CPU 22-2 memory 22-3 input circuit 23 light reflection plate 41 contact type detection device 43 dog plate 51 magnetic flux detection device 53 magnet Plate 61 Ultrasonic wave detector 63 Reflector

Claims (2)

[Claims] 1. A position information body which is provided at a plurality of points of a hoistway and has information unique to each of the points, a movable body which moves up and down in the hoistway, and the movable body which faces the position information body. A position detecting device for an elevator, comprising: a detection unit that is provided to detect the information of the position information body; and a position specifying unit that specifies the position of the moving body based on a signal from the detection unit. 2. The position detecting device for an elevator according to claim 1, wherein the detecting means is a non-contact detecting means such as an optical type or a magnetic type.