Car position detection device and elevator device

Abstract

This car position detection device comprises a medium (9), a first detection unit (10), a storage unit, a second detection unit (11), and a correction unit. The medium (9) extends along the moving direction of a car (1) that moves up and down in a hoistway (100). The first detection unit (10) is fixed to the car (1) and detects the position information of the car (1) by reading the medium (9). The storage unit stores, as initial position information, information in which the position in the hoistway (100) and the position information of the car (1) detected by the first detection unit (10) are associated with each other. The second detection unit (11) is fixed in the hoistway (100), and detects information detected by reading the medium (9) at the fixed position as reference position information. In response to a change in the reference position information detected by the second detection unit (11), the correction unit corrects the initial position information on the basis of the initial position information, the reference position information before the change, and the reference position information after the change.

Description

Cage position detection device and elevator device

[0001] The present disclosure relates to a car position detection device and an elevator device.

[0002] A conventional car position detection device includes a magnetic tape stretched between the ceiling of the elevator shaft and the pit floor, and a detector fixed to the car that reads the scale recorded on the magnetic tape. The memory unit stores a table that stores the magnetic scale value as a reference car position for each floor where the car lands (see, for example, Patent Document 1).

[0003] Special table 2019-77546 publication

[0004] In the conventional car position detection device described above, if the medium, such as the magnetic tape, expands or contracts or is replaced, the position of the magnetic scale will shift from its original position. If the position of the magnetic scale shifts from its original position and the car movement is controlled based on this value, there is a problem in that the car will end up moving to a position that is different from the expected position.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a car position detection device and elevator device that can correct information that corresponds to the position in the elevator shaft and the car position information after the medium is extended, expanded, or replaced.

[0006] The car position detection device of the present disclosure comprises a medium extending in the direction of movement of a car going up and down within an elevator shaft, a first detection unit fixed to the car and detecting position information of the car by reading the medium, a memory unit storing information correlating the position within the elevator shaft with the car position information detected by the first detection unit as initial position information, a second detection unit fixed within the elevator shaft and detecting the information detected by reading the medium at the fixed position as reference position information, and a correction unit that, when the reference position information detected by the second detection unit changes, corrects the initial position information based on the initial position information stored in the memory unit, the reference position information before the change detected by the second detection unit, and the reference position information after the change detected by the second detection unit.

[0007] The elevator apparatus according to the present disclosure comprises a car that moves up and down in a hoistway, a medium extending in the direction of movement of the car, a first detection unit fixed to the car and detecting position information of the car by reading the medium, a memory unit that stores information correlating the position in the hoistway with the position information of the car detected by the first detection unit as initial position information, a second detection unit fixed in the hoistway and detecting the information detected by reading the medium at the fixed position as reference position information, and a correction unit that, when the reference position information detected by the second detection unit changes, corrects the initial position information based on the initial position information stored in the memory unit, the reference position information before the change detected by the second detection unit, and the reference position information after the change detected by the second detection unit.

[0008] According to the present disclosure, it is possible to obtain a car position detection device and an elevator device that can correct information that correlates the position in the elevator shaft with the car position information after the medium is extended, expanded, or replaced.

[0009] FIG. 1 is a side view of an elevator device in embodiment 1. FIG. 2 is a front view of an operation unit in embodiment 1. FIG. 3 is a block diagram showing a control device in embodiment 1. FIG. 4 is a flowchart showing processing by a position information management unit of the control device in embodiment 1. FIG. 5 is a diagram showing distances from the first floor to other floors stored in a memory unit in embodiment 1. FIG. 6 is a diagram showing initial position information stored in a memory unit in embodiment 1. FIG. 7 is a diagram showing corrected position information when a magnetic tape stored in a memory unit in embodiment 1 expands or contracts. FIG. 8 is a diagram showing corrected position information when a magnetic tape stored in a memory unit in embodiment 1 is replaced. FIG. 9 is a diagram showing corrected position information when a magnetic tape stored in a memory unit in a modified example of embodiment 1 expands or contracts. FIG. 10 is a diagram showing an example configuration of a processing circuit of the control device in embodiment 1.

[0010] Embodiment 1. A car position detection device and an elevator device according to embodiment 1 will be described in detail below. Note that the same reference numerals in the various drawings represent the same or equivalent components.

[0011] As shown in Fig. 1, the elevator system includes a car 1, a counterweight 2, a main rope 3, a car guide rail 4, a counterweight guide rail 5, a hoist 6, a deflector sheave 7, a spring 8, a magnetic tape 9, a first detector 10, a second detector 11, an operation unit 12, and a control device 20. The car position detection device in this embodiment includes the magnetic tape 9, the first detector 10, the second detector 11, and a position information management unit 30, which will be described later. Note that the operation unit 12 is not shown in Fig. 1.

[0012] A car 1 and a counterweight 2 are provided in the hoistway 100. The car 1 is connected to one end of a main rope 3, and moves up and down in the hoistway 100 along a car guide rail 4 extending vertically. The counterweight 2 is connected to the other end of the main rope 3, and moves up and down in the hoistway 100 along a counterweight guide rail 5 extending vertically. The main rope 3 is wound around a sheave 6a and a deflector sheave 7 of a hoisting machine 6.

[0013] A machine room 101 is provided above the hoistway 100. A hoisting machine 6 and a deflector sheave 7 are provided in the machine room 101. The hoisting machine 6 has a sheave 6a and a motor (not shown), and the motor rotates the sheave 6a.

[0014] The magnetic tape 9 serving as the medium is provided in the hoistway 100 so as to extend along the direction of movement of the car 1. Specifically, one end of the magnetic tape 9 is fixed to the ceiling of the hoistway 100, and the other end is connected to a spring 8 provided on the bottom surface of the hoistway 100. The direction of movement of the car 1 is the vertical direction. Code information is recorded on the magnetic tape 9, and the magnetic tape 9 is provided so that the value of the code information increases from the bottom to the top in the vertical direction. The direction in which the magnetic tape 9 is attached may be reversed. The magnetic tape 9 may also be fixed to the ceiling of the hoistway 100 via a metal fitting such as a bracket.

[0015] The first detection unit 10 is fixed to the car 1 and detects the position information of the car 1 by reading the code information recorded on the magnetic tape 9. The first detection unit 10 is, for example, a magnetic sensor. The first detection unit 10 outputs the position information of the car 1 to an acquisition unit 31 (described later) via an input / output interface (not shown).

[0016] The second detection unit 11 is fixed within the elevator shaft 100. Specifically, the second detection unit 11 is fixed to the car guide rail 4, and is preferably fixed below the midpoint of the range of movement of the car 1 in the direction of movement of the car 1. For example, when the car 1 can move from an upper end point switch (not shown) located above the top floor to a lower end point switch (not shown) located below the bottom floor, the range of movement of the car 1 is the range from the upper end point switch to the lower end point switch. The second detection unit 11 is fixed below the midpoint of that range, i.e., on the lower end point switch side.

[0017] Furthermore, it is more preferable that the second detection unit 11 be fixed near the lowest floor on which the car 1 can land. The vicinity of the lowest floor is, for example, the range from the floor one level below the lowest floor to the floor one level above the lowest floor. Furthermore, if there are no other floors below the lowest floor but there is a pit, the vicinity of the lowest floor is, for example, the range from the pit to the floor one level above the lowest floor. In the following description, the lowest floor on which the car 1 can land is also simply referred to as the lowest floor.

[0018] The second detection unit 11 detects, as reference position information, information detected by reading code information recorded on the magnetic tape 9 at a fixed position of the second detection unit 11. The second detection unit 11 is, for example, a magnetic sensor. The second detection unit 11 outputs the reference position information to an acquisition unit 31 (described later) via an input / output interface (not shown).

[0019] The operation unit 12 is provided, for example, in the car 1 and is connected by wire to the control device 20. As shown in Fig. 2, the operation unit 12 has a changeover switch 12a, an up button 12b, a down button 12c, and a register button 12d.

[0020] The changeover switch 12a is a switch for switching the operation mode of the car 1. When the changeover switch 12a is switched from the normal operation mode to the inspection operation mode by an operator, the operation unit 12 outputs an inspection operation signal, which is an electrical signal indicating that the operation mode of the car 1 is to be switched to the inspection operation mode, to the control unit 40, which will be described later. Furthermore, when the changeover switch 12a is switched from the inspection operation mode to the normal operation mode by an operator, the operation unit 12 outputs a normal operation signal, which is an electrical signal indicating that the operation mode of the car 1 is to be switched to the normal operation mode, to the control unit 40, which will be described later.

[0021] The operation unit 12 outputs an up signal, which is an electrical signal indicating that the car 1 should be moved upward, to the control unit 40 (described later) only while the worker is pressing the up button 12b. Also, the operation unit 12 outputs a down signal, which is an electrical signal indicating that the car 1 should be moved downward, to the control unit 40 (described later) only while the worker is pressing the down button 12c. When the worker presses the registration button 12d, the operation unit 12 outputs a registration signal, which is an electrical signal indicating that an initial position (described later) should be registered, to the registration unit 34 (described later).

[0022] The control device 20 is a device such as a control board configured with a processor including a semiconductor integrated circuit, a memory, and an input / output interface, and controls the entire elevator system. An example of the configuration of the processing circuit of the control device 20 will be described later. As shown in Figure 3, the control device 20 includes a position information management unit 30 and a control unit 40.

[0023] The location information management unit 30 includes an acquisition unit 31 , a correction unit 32 , a determination unit 33 , a registration unit 34 , and a storage unit 35 .

[0024] The acquisition unit 31 includes a software module that acquires the position information of the car 1 from the first detection unit 10 and the reference position information from the second detection unit 11 .

[0025] The correction unit 32 includes a software module that corrects initial position information, which will be described later, based on initial position information, reference position information before the change, and reference position information after the change, which will be described later.

[0026] The determination unit 33 includes a software module that determines whether the reference position information has changed. The determination unit 33 also includes a software module that determines whether the reference position information has changed due to expansion or contraction of the magnetic tape 9 or due to replacement of the magnetic tape 9.

[0027] The registration unit 34 includes a software module that registers the initial position information (to be described later) and the reference position information acquired by the acquisition unit 31.

[0028] The memory unit 35 is a storage device configured with a volatile or non-volatile memory. The memory unit 35 stores information associating each floor with an initial position as initial position information. The memory unit 35 also stores information associating each floor with a corrected position as corrected position information. The memory unit 35 also stores reference position information. Furthermore, the memory unit 35 pre-stores the distance from the reference floor to other floors that are floors other than the reference floor. The reference floor and other floors are floors at which the car 1 can land. In this embodiment, the reference floor is the lowest floor.

[0029] The control unit 40 includes a software module that controls the movement of the car 1 in an operation mode selected by the selector switch 12a of the operation unit 12. The normal operation mode is a normal mode selected for the movement of users, and is an operation mode in which the car 1 is moved in accordance with call registration. The inspection operation mode is a mode selected during maintenance and inspection, and is an operation mode in which the car 1 is moved in accordance with manual operation by an operator. The control unit 40 also includes a software module that notifies the determination unit 33 of the operation mode of the car 1.

[0030] Next, the operation of the car position detection device and elevator device according to this embodiment will be described with reference to Fig. 4. Fig. 4 is a flowchart showing the processing of the control device 20.

[0031] In step S1, the registration unit 34 registers initial position information. In other words, the registration unit 34 stores information associating each floor with an initial position in the storage unit 35 as initial position information.

[0032] Specifically, first, an operator switches the operation mode of car 1 to inspection operation mode using changeover switch 12a of operation unit 12, and presses up button 12b or down button 12c to move car 1 to the lowest floor, which is the reference floor. Control unit 40 controls the movement of car 1 in inspection operation mode. While control unit 40 receives an up signal or down signal output from operation unit 12, it controls hoist 6 to raise or lower car 1.

[0033] Next, with car 1 stopped at the lowest floor, the worker presses the registration button 12d on the operation unit 12. When the registration button 12d is pressed, the operation unit 12 outputs a registration signal to the registration unit 34. Upon receiving the registration signal, the registration unit 34 stores the position information of car 1 acquired by the acquisition unit 31 in the memory unit 35 as an initial position, in association with the lowest floor.

[0034] Finally, the registration unit 34 stores initial position information in the memory unit 35 based on the initial position corresponding to the lowest floor and the distances from the lowest floor to the other floors previously stored in the memory unit 35. As shown in FIG. 5 , the memory unit 35 stores the distances from the first floor (the lowest floor) to the other floors. The left column of FIG. 5 shows the other floors (the second to fifth floors), and the right column shows the distances from the first floor to the other floors. The memory unit 35 stores the distances from the first floor to the second floor as 3 m, the distance from the first floor to the third floor as 6 m, the distance from the first floor to the fourth floor as 9 m, and the distance from the first floor to the fifth floor as 12 m. For example, if the initial position corresponding to the first floor (the lowest floor) is 4 m and the distance from the first floor to the second floor is 3 m, the registration unit 34 adds these values ​​to calculate the initial position corresponding to the second floor. As shown in FIG. 6 , the registration unit 34 stores the initial position corresponding to the second floor as 7 m in the memory unit 35. For floors other than the second floor, calculations can be performed in the same manner based on the initial position of 4 m corresponding to the first floor and the distances from the first floor to the other floors stored in the storage unit 35, and each floor can be associated with its initial position and stored in the storage unit 35. The left column of Fig. 6 shows each floor, and the right column shows the corresponding initial positions.

[0035] As described above, the initial position is calculated based on the position information of car 1 detected by the first detection unit 10 and the distance from the reference floor to the other floors stored in the memory unit 35. By calculating in this manner, if the first detection unit 10 can detect the position information of car 1 on the reference floor, it is possible to calculate the initial position corresponding to the other floors without detecting the position information of car 1 on the other floors. In other words, it is possible to calculate the initial position corresponding to the other floors without moving car 1 to the other floors, and it is possible to quickly register the initial position information.

[0036] In step S2, the registration unit 34 registers the reference position information acquired by the acquisition unit 31. Specifically, the acquisition unit 31 acquires the reference position information detected by the second detection unit 11. The registration unit 34 stores this reference position information in the storage unit 35 as reference position information before the change.

[0037] After the initial position information and the reference position information before the change are registered, the worker switches the operation mode of the car 1 to the normal operation mode using the changeover switch 12a of the operation unit 12. When inspecting the elevator device or replacing the magnetic tape 9, the worker may switch the operation mode of the car 1 to the inspection operation mode using the changeover switch 12a.

[0038] In step S3, the determination unit 33 determines whether the reference position information has changed. Specifically, the acquisition unit 31 periodically acquires the reference position information detected by the second detection unit 11. The determination unit 33 compares the reference position information acquired by the acquisition unit 31 in step S3 with the reference position information before the change stored in the storage unit 35. If the reference position information acquired by the acquisition unit 31 in step S3 differs from the reference position information before the change, the determination unit 33 determines that the reference position information has changed, and proceeds to step S4. If the reference position information acquired by the acquisition unit 31 in step S3 is equal to the reference position information before the change, the determination unit 33 determines that the reference position information has not changed, and proceeds to step S3. Note that the determination unit 33 may also determine that the reference position information has changed if there is a difference between the reference position information acquired by the acquisition unit 31 in step S3 and the reference position information before the change that is equal to or greater than a predetermined threshold. Note that the acquisition unit 31 may acquire the reference position information irregularly, rather than periodically.

[0039] In step S4, the registration unit 34 registers the reference position information acquired by the acquisition unit 31. Specifically, the acquisition unit 31 acquires the reference position information detected by the second detection unit 11. The registration unit 34 stores this reference position information in the storage unit 35 as post-change reference position information.

[0040] In step S5, the determination unit 33 determines whether the reference position information has changed due to expansion or contraction of the magnetic tape 9, or whether the reference position information has changed due to replacement of the magnetic tape 9. Specifically, the control unit 40 notifies the determination unit 33 of the operation mode of car 1. When the operation mode of car 1 is the normal operation mode, the determination unit 33 determines that the reference position information has changed due to expansion or contraction of the magnetic tape 9, and proceeds to step S6. When the operation mode of car 1 is the inspection operation mode, the determination unit 33 determines that the reference position information has changed due to replacement of the magnetic tape 9, and proceeds to step S7.

[0041] In step S6, the correction unit 32 corrects the initial position information based on the initial position information, the reference position information before the change, the reference position information after the change, and the distance from one end of the magnetic tape 9 to the second detection unit 11 in the moving direction of the car 1. In step S6, the correction of the initial position information is performed when the magnetic tape 9 expands or contracts. Specifically, the correction unit 32 calculates a corrected position by correcting the initial position corresponding to each floor from the initial position information, and stores information correlating each floor with the corrected position in the memory unit 35 as corrected position information. The corrected position information is information obtained by correcting the initial position information. Below is a formula for calculating the corrected position in order to correct the initial position information.

[0042]

[0043]

[0044] As shown in Equation 1, the amount of change "Δx" in the reference position information is calculated by subtracting the reference position information "x1" before the change from the reference position information "x2" after the change. As shown in Equation 2, the amount of change "Δx" in the reference position information is added to the distance "L" from one end of the magnetic tape 9 to the second detection unit 11 in the vertical direction, and then the result is divided by the distance "L" and multiplied by the initial position "a", to calculate the corrected position "a'".

[0045] An example of calculating the corrected position a' corresponding to each floor will be described below when the initial position information is as shown in Figure 6, the reference position information x1 before the change is 1 m, the reference position information x2 after the change is 1.2 m, and the distance L in the vertical direction from one end of the magnetic tape 9 to the second detection unit 11 is 20 m.

[0046] First, the correction unit 32 calculates the amount of change Δx in the reference position information as 0.2 m using Equation 1.

[0047] Next, the correction unit 32 calculates the corrected position a' corresponding to the first floor using Equation 2. As shown in FIG. 6, the initial position a corresponding to the first floor is 4 m. The correction unit 32 calculates the corrected position a' corresponding to the first floor to be 4.04 m using Equation 2. The corrected positions a' corresponding to the other floors can also be calculated in the same way using Equation 2. After calculating the corrected position, the correction unit 32 stores information associating each floor with the corrected position in the storage unit 35 as corrected position information, as shown in FIG. 7. Then, the processing ends.

[0048] In step S7, the correction unit 32 corrects the initial position information based on the initial position information, the reference position information before the change, and the reference position information after the change. In step S7, the correction of the initial position information when the magnetic tape 9 is replaced is performed. Specifically, the correction unit 32 calculates a corrected position by correcting the initial position corresponding to each floor in the initial position information, and stores information correlating each floor with the corrected position in the storage unit 35 as corrected position information. Note that the corrected position information is information obtained by correcting the initial position information. Below is a formula for calculating the corrected position in order to correct the initial position information.

[0049]

[0050] As shown in Equation 3, the corrected position "a'" is calculated by subtracting the pre-change reference position information "x1" from the initial position "a" and then adding the post-change reference position information "x2".

[0051] An example of calculating a corrected position a' corresponding to each floor will be described below when the initial position information is as shown in FIG. 6, the reference position information x1 before the change is 1 m, and the reference position information x2 after the change is 2 m.

[0052] First, the correction unit 32 calculates the corrected position a' corresponding to the first floor using Equation 3. As shown in FIG. 6, the initial position a corresponding to the first floor is 4 m. The correction unit 32 calculates the corrected position a' corresponding to the first floor to be 4 m using Equation 3. The corrected positions a' corresponding to the other floors can also be calculated in the same way using Equation 3. After calculating the corrected position, the correction unit 32 stores information associating each floor with the corrected position in the storage unit 35 as corrected position information, as shown in FIG. 8. Then, the processing ends.

[0053] After the correction unit 32 corrects the initial position information, the control unit 40 controls the movement of the car 1 using corrected position information, which is information obtained by correcting the initial position information.

[0054] The car position detection device and elevator apparatus according to the first embodiment include a second detection unit that is fixed within the hoistway 100 and detects information detected by reading the magnetic tape 9 at the fixed position as reference position information, and a correction unit 32 that, when the reference position information detected by the second detection unit 11 changes, corrects the initial position information based on the initial position information stored in the memory unit 35, the reference position information before the change detected by the second detection unit 11, and the reference position information after the change detected by the second detection unit 11. Therefore, the initial position information can be corrected after the magnetic tape 9 is extended, contracted, or replaced. The control unit 40 controls the movement of the car 1 using corrected position information, which is information obtained by correcting the initial position information, thereby preventing the car 1 from moving to a position deviating from its intended position.

[0055] Furthermore, in the car position detection device and elevator apparatus according to the first embodiment, the second detection unit 11 is fixed below the midpoint of the movable range of the car 1 in the direction of movement of the car 1. Compared to when the second detection unit 11 is fixed above the midpoint, the amount of change in the reference position information when the magnetic tape 9 expands or contracts tends to be larger. Therefore, the influence of measurement errors dependent on the equipment used as the second detection unit 11 can be suppressed. Furthermore, when the second detection unit 11 is fixed near the lowest floor, the influence of measurement errors dependent on the equipment used as the second detection unit 11 can be further suppressed.

[0056] Furthermore, the car position detection device and elevator device according to the first embodiment include a determination unit 33 that determines whether the reference position information has changed due to expansion or contraction of the magnetic tape 9 or due to replacement of the magnetic tape 9. Based on the determination result of the determination unit 33, the initial position information can be appropriately corrected.

[0057] Although the example in which the medium is magnetic tape 9 has been described, the medium may have optical characteristics, mechanical shape or properties, a geometric pattern shape displayed on the surface, etc. Furthermore, the first detection unit 10 and the second detection unit 11 may be an image sensor, a magnetostrictive sensor, an optical sensor, etc.

[0058] Although the example in which the operation unit 12 is connected to the control device 20 by wire has been described, the operation unit 12 may also be connected to the control device 20 wirelessly. The operation unit 12 may be a mobile terminal such as a smartphone. The operation unit 12 may output an electrical signal such as a registration signal by infrared rays. Furthermore, the operation unit 12 does not have to be provided in the car 1. When the elevator device does not have the operation unit 12, the control device 20 may have, for example, a selector switch 12a, an up button 12b, a down button 12c, and a registration button 12d.

[0059] Although an example in which the position information management unit 30 is provided in the control device 20 has been described, the position information management unit 30 may be provided in another device of the elevator system.

[0060] The reference floor may be a floor other than the lowest floor.

[0061] The registration unit 34 may register the initial position information based only on the position information of the car 1, without using the distance from the reference floor to the other floors. Specifically, an operator may use the operation unit 12 to move the car 1 and stop it at each floor in turn, and the position information of the car 1 detected by the first detection unit 10 in the stopped state may be stored in the memory unit 35 as the initial position corresponding to each floor.

[0062] An example has been described in which the initial position and the corrected position are stored in the memory unit 35 as positions within the elevator shaft 100 and associated with each floor, but this information may also be stored in the memory unit 35 as positions within the elevator shaft 100 and associated with the distance from the bottom of the elevator shaft 100, etc.

[0063] The corrected position may be calculated using the following Equation 4 instead of Equations 1 and 2. In other words, the correction unit 32 may correct the initial position information based on the initial position information, the reference position information before the change, the reference position information after the change, and the total length of the magnetic tape 9 when the magnetic tape 9 is installed in the hoistway 100.

[0064]

[0065] As shown in Equation 4, the corrected position "a'" is calculated by subtracting the reference position information "x1" before the change from the total length "D" of the magnetic tape 9 when the magnetic tape 9 is installed in the elevator shaft 100, dividing the result by the value obtained by subtracting the reference position information "x2" after the change from the total length "D", and then multiplying it by the initial position "a".

[0066] An example of calculating the corrected position a' corresponding to each floor will be described below when the initial position information is as shown in Figure 6, the reference position information x1 before the change is 1 m, the reference position information x2 after the change is 1.2 m, and the total length D of the magnetic tape 9 when installed in the elevator shaft 100 is 20 m.

[0067] The correction unit 32 calculates the corrected position a' corresponding to the first floor using Equation 4. As shown in FIG. 6, the initial position a corresponding to the first floor is 4 m. The correction unit 32 calculates the corrected position a' corresponding to the first floor to be 4.04 m using Equation 3. The corrected positions a' corresponding to the other floors can also be calculated in the same way using Equation 4. After calculating the corrected position, the correction unit 32 stores information associating each floor with the corrected position in the memory unit 35 as corrected position information, as shown in FIG. 9.

[0068] The formulas for calculating the corrected position when the magnetic tape 9 expands or contracts or when the magnetic tape 9 is replaced are not limited to Formulas 1 to 4. For example, the corrected position may be calculated using a formula that takes into account the temperature distribution in the hoistway 100, the strength of the magnetic tape 9, or the like.

[0069] The corrected position information does not have to be stored in the storage unit 35. When controlling the movement of the car 1, the corrected position corresponding to each floor may be calculated sequentially, and the initial position information may be corrected.

[0070] An example of the configuration of the processing circuit of the control device 20 will be described with reference to Fig. 10. Fig. 10 is a diagram showing an example of the configuration of the processing circuit of the control device 20 according to the first embodiment.

[0071] Each function of the control device 20 can be realized by a processing circuit. For example, the processing circuit includes at least one processor 51 and at least one memory 52. ​​Furthermore, for example, the processing circuit includes at least one dedicated hardware 53.

[0072] When the processing circuit includes at least one processor 51 and at least one memory 52, each function of the control device 20 is realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. At least one of the software and firmware is stored in at least one memory 52. ​​The at least one processor 51 realizes the functions of the control device 20 by reading and executing the program stored in the at least one memory 52. ​​The at least one processor 51 is also referred to as a CPU, central processing unit, processing device, arithmetic unit, microprocessor, microcomputer, or DSP. For example, the at least one memory 52 is a non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, or EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a minidisk, a DVD, or the like.

[0073] When the processing circuit includes at least one dedicated hardware 53, the processing circuit may be realized, for example, as a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. Each function of the control device 20 may be realized by a separate processing circuit, or all functions of the control device 20 may be realized together by a single processing circuit.

[0074] Some of the functions of the control device 20 may be realized by dedicated hardware 53, and the other parts may be realized by software or firmware.

[0075] In this way, the processing circuitry realizes each function of the control device 20 using hardware 53, software, firmware, or a combination thereof.

[0076] DESCRIPTION OF SYMBOLS 1 Cage, 2 Counterweight, 3 Main rope, 4 Cage guide rail, 5 Counterweight guide rail, 6 Hoist, 6a Sheave, 7 Deflector, 8 Spring, 9 Magnetic tape, 10 First detection unit, 11 Second detection unit, 12 Operation unit, 12a Changeover switch, 12b Up button, 12c Down button, 12d Registration button, 20 Control device, 30 Position information management unit, 31 Acquisition unit, 32 Correction unit, 33 Determination unit, 34 Registration unit, 35 Memory unit, 40 Control unit, 100 Hoistway, 101 Machine room

Claims

1. a medium extending along the moving direction of a cage that moves up and down within a hoistway; a first detection unit fixed to the cage and detecting position information of the cage by reading the medium; a storage unit storing, as initial position information, information associating a position within the hoistway with the position information of the cage detected by the first detection unit; a second detection unit fixed within the hoistway and detecting, as reference position information, information detected by reading the medium at a fixed position; a correction unit correcting the initial position information based on the initial position information stored in the storage unit, the reference position information before the change detected by the second detection unit, and the reference position information after the change detected by the second detection unit when the reference position information detected by the second detection unit changes; a determination unit determining whether the change in the reference position information is caused by expansion and contraction of the medium or by replacement of the medium; a cage position detection device comprising the above.

2. The cage position detection device according to claim 1, wherein the second detection unit is fixed below an intermediate point of a movable range of the cage in the moving direction.

3. The cage position detection device according to claim 2, wherein the second detection unit is fixed near the lowest floor where the cage can land.

4. One end of the medium is fixed to the ceiling of the hoistway, The correction unit corrects the initial position information based on the initial position information stored in the storage unit, the reference position information before the change detected by the second detection unit, the reference position information after the change detected by the second detection unit, and a distance from one end of the medium to the second detection unit in the moving direction when the reference position information detected by the second detection unit changes, according to any one of claims 1 to 3.

5. The correction unit corrects the initial position information based on the initial position information stored in the storage unit, the reference position information before the change detected by the second detection unit, the reference position information after the change detected by the second detection unit, and the total length of the medium when the medium is installed in the hoistway, according to any one of claims 1 to 3. The car position detection device according to claim 1, wherein when the operation mode of the car is the normal operation mode in which the car is moved according to the call registration, the determination unit determines that the reference position information has changed due to the expansion and contraction of the medium.

7. The car position detection device according to claim 1 or 2, wherein when the operation mode of the car is the inspection operation mode in which the car is moved according to the manual operation by the operator, the determination unit determines that the reference position information has changed due to the replacement of the medium.

8. A medium extending along the moving direction of a car moving up and down in a hoistway, a first detection unit fixed to the car and detecting the position information of the car by reading the medium, a storage unit that stores in advance the distance from a reference floor where the car lands to other floors, a registration unit that calculates the position information of the car corresponding to the other floor based on the position information of the car detected by the first detection unit in a state where the car has stopped at the reference floor and the distance from the reference floor to the other floor stored in advance in the storage unit, and stores, in the storage unit, as initial position information, information associating each floor including the reference floor and the other floor with the position information of the car, a second detection unit fixed in the hoistway and detecting, as reference position information, information detected by reading the medium at a fixed position, a correction unit that corrects the initial position information based on the initial position information stored in the storage unit, the reference position information before the change detected by the second detection unit, and the reference position information after the change detected by the second detection unit when the reference position information detected by the second detection unit has changed, A car position detection device comprising:

9. A car moving up and down in a hoistway, a medium extending along the moving direction of the car, a first detection unit fixed to the car and detecting the position information of the car by reading the medium, a storage unit that stores, as initial position information, information associating the position in the hoistway with the position information of the car detected by the first detection unit, a second detection unit fixed in the hoistway and detecting, as reference position information, information detected by reading the medium at a fixed position, When the reference position information detected by the second detection unit changes, a correction unit that corrects the initial position information based on the initial position information stored in the storage unit, the reference position information before the change detected by the second detection unit, and the reference position information after the change detected by the second detection unit; A determination unit that determines whether the reference position information has changed due to the expansion and contraction of the medium or due to the replacement of the medium; An elevator device comprising the same.

10. For each car that moves up and down in the hoistway, A medium extending along the moving direction of the car; A first detection unit that is fixed to the car and detects the position information of the car by reading the medium; A storage unit that stores in advance the distance from the reference floor where the car lands to other floors; Based on the position information of the car detected by the first detection unit when the car stops at the reference floor and the distance from the reference floor to the other floors stored in advance in the storage unit, calculates the position information of the car corresponding to the other floors, and stores in the storage unit as initial position information the information associating each floor including the reference floor and the other floors with the position information of the car; A registration unit; A second detection unit that is fixed in the hoistway and detects, as reference position information, information detected by reading the medium at a fixed position; When the reference position information detected by the second detection unit changes, a correction unit that corrects the initial position information based on the initial position information stored in the storage unit, the reference position information before the change detected by the second detection unit, and the reference position information after the change detected by the second detection unit; An elevator device comprising the same.