Position detection system for elevator and position detection method for elevator

Abstract

To provide a position detection system and a position detection method for an elevator that are able to facilitate setting of a door zone and are able to secure the position detection accuracy of a car.SOLUTION: The position detection system for the elevator includes: a first position detector (8) that detects an amount of movement of a car (20); and a control device (2) that detects a position of the car, based on an integrated value of the amounts of movement of the car detected by the first position detector. The control device stores a range of a door zone of each floor and determines whether the detected position of the car is within the stored range of the door zone.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an elevator position detection system and a position detection method for detecting the position of a car in a hoistway. [Background technology]

[0002] The elevator is equipped with a position detection system that detects the position of the car in the elevator shaft, and the operation of the car is controlled based on the position of the car detected by the position detection system.

[0003] 2. Description of the Related Art As a conventional technique relating to an elevator position detection system, the technique described in Patent Document 1 is known.

[0004] In the door-open running protection device described in Patent Document 1, when the elevator car is in an open door state at a specified distance from the landing reference position and is running at a speed that exceeds a threshold value that is preset according to the distance from the landing reference position, the elevator car is brought to an emergency stop.

[0005] The distance between the landing reference position and the car is calculated based on the amount of movement of the car and the floor reference position. The amount of movement of the car is detected based on a pulse signal output by a rotary encoder attached to a governor pulley. The floor reference position is detected by a detection plate attached to the threshold of the landing to set the door zone, and a position sensor provided in the car.

[0006] When the edge of the detection plate is detected by the position sensor, the elevator car is located at the floor reference position. The detection plate is attached to the threshold of the landing so that the distance between the position of the edge and the floor landing reference position is a predetermined value. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] International Publication No. 2011 / 158301 Summary of the Invention [Problem to be solved by the invention]

[0008] In the above-mentioned conventional technology, the mounting position of the detection plate affects the accuracy of detecting the position of the car, so that the detection plate needs to be mounted and positioned with high accuracy on each floor, which makes the setting of the door zone complicated.

[0009] Therefore, the present invention provides an elevator position detection system and a position detection method that can facilitate setting of a door zone and ensure the accuracy of detecting the position of the elevator car. [Means for solving the problem]

[0010] In order to solve the above problems, the elevator position detection system according to the present invention includes a first position detector that detects the amount of movement of the car, and a control device that detects the position of the car based on an integrated value of the amount of movement of the car detected by the first position detector. The control device stores the range of the door zone of each floor, and judges whether the detected position of the car is within the range of the stored door zone.

[0011] In order to solve the above problems, the elevator position detection method according to the present invention is a method for detecting the position of a car based on an integrated value of the amount of movement of the car. In this method, the range of the door zone of each floor is calculated in advance from the position of the car, the amount of deviation between the floor surface of the car and the landing floor surface of each floor, and a predetermined width of the door zone when the car stops at each floor. Furthermore, it is determined whether the detected position of the car is within the range of the door zone calculated in advance. Effect of the Invention

[0012] According to the present invention, it is possible to easily set a door zone while ensuring the accuracy of detecting the position of the car.

[0013] Problems, configurations and effects other than those described above will become apparent from the following description of the embodiments. [Brief description of the drawings]

[0014] [Figure 1] 1 is an overall configuration diagram showing an elevator according to one embodiment; [Diagram 2] 4 shows an output pattern of a position detection sensor 27 in the embodiment. [Diagram 3] 2 is a functional block diagram showing the configuration of a safety control device 2 in the embodiment. FIG. [Figure 4] 5 is a flowchart showing the operation of a reference position storage processing unit 64 (FIG. 3) in the safety control device 2. [Diagram 5] 2 shows an example of a reference position table 63. [Figure 6] 5 is a flowchart showing the operation of a door zone position creation unit 65 (FIG. 3) in the safety control device 2. [Figure 7] 1 shows an example of a door zone position table 68. [Figure 8] 4 is a flowchart showing the operation of a failure detection unit 66 (FIG. 3) in the safety controller 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0016] In the following description, the position or position information of the car represents the height from a reference position in the elevator shaft (in this embodiment, the landing floor surface of the reference floor (lowest floor)) to the reference part of the car (in this embodiment, the car floor surface). In other words, the position or position information of the car represents an absolute position in the elevator shaft.

[0017] FIG. 1 is a diagram showing the overall configuration of an elevator according to one embodiment of the present invention.

[0018] The car 20 is connected to a counterweight 22 through a main rope 21 in the hoistway. The main rope 21 is wound around a sheave provided in the hoist. When a power converter provided in the elevator control device 3 supplies power to a motor 9 provided in the hoistway, the sheave is rotated by the motor 9. When the main rope 21 is driven by the rotating sheave, the car 20 moves between multiple floors in the hoistway. A buffer 30 is provided at the bottom of the hoistway, i.e., the pit, to receive the car 20 when it descends beyond the terminal floor.

[0019] An encoder, which is a pulse generator, is attached to the motor 9. The elevator control device 3 counts pulses generated by the encoder in response to the rotation of the motor 9. By counting the pulses, the elevator control device 3 calculates the speed of the motor 9, the position of the car 20 in the moving direction, the amount of displacement of the relative position of the car 20, i.e., the amount of movement, and the like. Based on this calculation, the elevator control device 3 controls the motor 9 to control the operation of the car 20. In controlling the landing of the car 20, the elevator control device 3 aligns the car floor surface with the landing floor surface.

[0020] The car 20 is provided with a car-side door that engages with the hall-side door 23 and is opened and closed together with the hall-side door 23 by a door drive device provided in the car 20, and a position detection sensor 27. The position detection sensor 27 detects detection plates 50-54 that are provided at the terminal floor and any other location in the elevator shaft. When the detection plates 50-54 are detected, the elevator control device 3 determines that the car 20 has reached the position indicated by the detection plates 50-54. In other words, the position detection sensor 27 and the detection plates 50-54 constitute a position detection device that discretely detects the position of the car 20.

[0021] The detection plate 50 of the terminal floor is installed at a position corresponding to the lowest floor, and the other detection plates 51-54 are installed in the elevator shaft on the same extension as the detection plate 50. The mounting positions of these detection plates 51-54 do not need to correspond to floor positions and may be any positions. The terminal floor is identified by the detection plate 50 by the following means.

[0022] The position detection sensor 27 is composed of two sensors (for example, photoelectric sensors) (see FIG. 2 described later). Of the two sensors, both respond to the detection plate 50, and only one responds to the other detection plates 51-54. In this way, the terminal floor is identified based on the detection signal of the position detection sensor 27. The lengths of the detection plates 50-54 do not need to correspond to the door zones, and are set appropriately within a range of, for example, several centimeters to several tens of centimeters.

[0023] If the position detection sensor 27 can detect a specific discrete position in the elevator shaft, the platform threshold, platform door, beams in the elevator shaft, etc. may be used as the detection object instead of the detection plate.

[0024] A governor rope connected to the car 20 is wound around a governor pulley provided in the governor 7. The governor pulley rotates following the movement of the car 20. The amount of rotation of the governor pulley is detected by a relative position detection sensor 8 provided in the governor 7. In this embodiment, a rotational position detection sensor is applied as the relative position detection sensor 8. The rotational position detection sensor rotates together with the governor pulley in response to the movement of the car.

[0025] The relative position detection sensor 8 generates a signal according to the movement of the car 20. The output of the relative position detection sensor 8 is input to the safety control device 2 together with the output of the position detection sensor 27. The safety control device 2 detects the amount of variation in the relative position of the car 20, i.e., the amount of movement, based on the output signal of the relative position detection sensor 8. The safety control device 2 detects the discrete positions of the car 20 based on the output signal of the position detection sensor 27.

[0026] As the rotational position detection sensor, for example, an encoder is applied. The encoder outputs a pulse signal in accordance with the movement of the car 20. The safety control device 2 detects the amount of movement of the car 20 by counting the number of pulses.

[0027] The rotational position detection sensor may be provided in the car 20. In this case, the rotational position detection sensor is attached to a rotating roller that contacts the guide rail.

[0028] As long as the amount of movement of the car 20 can be detected, another relative position detection sensor 8 may be applied instead of the rotational position detection sensor. For example, an image sensor that captures an image of the surface of the guide rail may be installed in the car 20, and the amount of movement of the car 20 may be detected from a change in the captured image. Also, the amount of movement of the car 20 may be detected by integrating twice the acceleration of the car 20 detected by an acceleration sensor provided in the car 20. Also, the encoder attached to the motor 9 of the hoisting machine may be shared by the elevator control device 3 and the safety control device 2.

[0029] In this embodiment, the relative position detection sensor 8 is duplicated, ensuring reliability in detecting the amount of rotation.

[0030] As a means for duplication of the relative position detection sensor 8, two sensors of the same type, for example, encoders, may be provided, or two sensors of different types, for example, an encoder and an acceleration sensor, may be provided.

[0031] The safety control device 2 detects the position of the car 20 independently of the elevator control device 3. The safety control device 2 in this embodiment determines whether the car 20 is located in a door zone, which is an area where the door can be opened, based on position information of the car 20 obtained using the relative position detection sensor 8 and discrete position detection devices (position detection sensor 27 and detection target plates 50 to 54). The door zone is an area where the car side door and the hall side door 23 can engage with each other and be opened and closed together.

[0032] The safety control device 2 executes safety processing based on the determination result of whether the car 20 is located in the door zone. For example, when the safety control device 2 determines that the car 20 is traveling outside the door zone with any door open based on the determination result, a signal from a landing door switch that detects opening and closing of the landing side door 23, and a signal from a car door switch that detects opening and closing of the car side door, the safety control device 2 performs an emergency stop of the car 20. That is, the safety control device 2 has a door-open traveling protection function. In addition, when the safety control device 2 detects the opening of any door while the car 20 is traveling outside the door zone, the safety control device 2 performs an emergency stop of the car 20.

[0033] When the car 20 is to be brought to an emergency stop, the safety control device 2 opens the contacts of the electromagnetic contactor 4 to cut off the power supply from the building power source 10 to the elevator control device 3. This stops the power supply from the power converter to the motor 9, and the brake device 5 is activated to brake the motor 9.

[0034] 1, the safety controller 2 is installed in a control panel 14 together with the elevator controller 3. The installation position of the safety controller 2 may be above the car 20, taking into consideration the wiring length of the signal lines between the sensors (8, 27) and the safety controller 2.

[0035] 2 shows an output pattern of the position detection sensor 27 in this embodiment. The position detection sensor 27 is composed of two photoelectric sensors (A and B in the figure). In the figure, the position detection sensor 27 is referred to as the "second position detection sensor (27)" (the relative position detection sensor 8 is referred to as the "first position detection sensor (8)" as appropriate).

[0036] When the position detection sensor 27 detects the detection target plate 51 (FIG. 1) located at the end floor, the optical axes of the photoelectric sensors A and B both come into contact with the detection target plate. Therefore, both the photoelectric sensors A and B are in the ON state ("1" in the figure).

[0037] The other detection target plates 51 to 54 are provided at arbitrary positions, and the positions are indicated as "position a" and "position b" in FIG.

[0038] When the position detection sensor 27 detects a plate to be detected that is positioned at position a, only the optical axis of the photoelectric sensor B contacts the plate to be detected among the optical axes of the photoelectric sensors A and B. As a result, the photoelectric sensor A is in the OFF state ("0" in the figure), and the photoelectric sensor B is in the ON state.

[0039] When the position detection sensor 27 detects a plate to be detected that is positioned at position b, only the optical axis of the photoelectric sensor A abuts against the plate to be detected among the optical axes of the photoelectric sensors A and B. Therefore, the photoelectric sensor A is in the ON state and the photoelectric sensor B is in the OFF state.

[0040] The detection plate positioned at position a and the detection plate positioned at position b are installed alternately in the elevator shaft, or one and the other are installed near the odd-numbered floors and the even-numbered floors, respectively.

[0041] FIG. 3 is a functional block diagram showing the configuration of the safety control device 2 in this embodiment.

[0042] In this embodiment, the safety control device 2 includes a computer system such as a microcomputer. The computer system executes a predetermined program to operate as each unit.

[0043] The movement amount detection unit 60 receives an output signal of the first position detection sensor (8), i.e., the relative position detection sensor 8 (FIG. 1). The movement amount detection unit 60 calculates the amount of movement of the car 20 based on the input output signal of the first position detection sensor (8).

[0044] The reference position detection unit 61 receives an output signal of the second position detection sensor (27), i.e., the position detection sensor 27 (FIG. 1) constituting a discrete position detection device. The reference position detection unit 61 determines the current position of the car 20 based on the pattern of the input output signal, i.e., the output pattern shown in FIG. 2, and detects the ON / OFF state of each sensor (A and B shown in FIG. 2) constituting the second position detection sensor (27).

[0045] The car position detection unit 62 calculates current position information of the car 20 based on the amount of movement of the car 20 calculated by the movement amount detection unit 60 and the current position of the car 20 detected by the reference position detection unit 61. The safety control device 2 outputs the current position information calculated by the car position detection unit 62 as a car position signal.

[0046] When calculating the current position information, the car position detection unit 62 accumulates the amount of movement of the car 20, and calculates the current position of the car 20 based on the accumulated value. Furthermore, the car position detection unit 62 refers to the reference position table 63, corrects the calculated value of the current position of the car 20 as necessary, and sets the corrected value as the current position information of the car 20.

[0047] The reference position table 63 stores the correspondence between the position of the car 20 calculated based on the output signal of the first position detection sensor (8) and the output pattern of the second position detection sensor (27). When the position of the car 20 calculated by integrating the amount of movement of the car 20 deviates from the position of the car 20 in the reference position table 63 calculated based on the output signal of the first position detection sensor (8), the car position detection unit 62 corrects the calculated value of the current position of the car 20 based on the position of the car 20 in the reference position table 63.

[0048] The above-mentioned correction compensates for the accumulation of detection errors of the first position detection sensor (8), i.e., the relative position detection sensor 8, which accompanies the accumulation of the movement amount of the car 20. For example, when an encoder attached to a governor pulley is used as the relative position detection sensor 8, factors that cause errors include wear of the governor pulley, an error between the slits of the encoder, and tension fluctuations in the governor rope depending on temperature.

[0049] More specifically, the reference position table 63 stores the position of the car 20 calculated based on the output signal of the first position detection sensor (8) when the ON / OFF state of the second position detection sensor (27) is switched. The reference position table 63 is created by the reference position storage processing unit 64 when the safety control device 2 receives a table creation start signal from the elevator control device 3 or a maintenance terminal device (not shown).

[0050] The reference position storage processing unit 64 starts operation when a table creation start signal is input. When the reference position storage processing unit 64 starts operation, it sequentially accumulates the amount of movement of the car 20 calculated by the movement amount detection unit 60 to calculate the position of the car 20. The reference position storage processing unit 64 holds the calculated position of the car 20, and updates the held position of the car 20 to a new accumulated value every time the amount of movement is accumulated. In addition, when the reference position storage processing unit 64 starts operation, it detects a change in the ON / OFF state, i.e., the output pattern (FIG. 2), based on the ON / OFF state of the second position detection sensor (27) detected by the reference position detection unit 61. When the reference position storage processing unit 64 detects a change between the ON state and the OFF state, it stores the held current position of the car 20 in the reference position table 63 in association with the output pattern of the second position detection sensor (27).

[0051] The elevator control device 3 also receives the table creation start signal and starts a predetermined operation. At this time, the elevator control device 3 operates the car 20 at a low speed and stops it at each floor.

[0052] The door zone position creation unit 65 starts operating when a table creation start signal is input. When the door zone position creation unit 65 starts operating, it sequentially accumulates the amount of movement of the car 20 calculated by the movement amount detection unit 60 to calculate the position of the car 20. The door zone position creation unit 65 holds the calculated position of the car 20, and updates the held position of the car 20 to a new accumulated value every time it accumulates the amount of movement. Furthermore, the door zone position creation unit 65 calculates the center position of the door zone based on the position correction signal sent from the maintenance terminal device when the elevator control device 3 stops the car 20 at each floor and the car position information held by the door zone position creation unit 65, and further calculates the door zone range based on the calculated door center position and a predetermined door zone width. The door zone position creation unit 65 stores the calculated door zone range in the door zone position table 68.

[0053] When a change in the output pattern (FIG. 2) of the second position detection sensor (27) detected by the reference position detection unit 61 is detected, the failure detection unit 66 refers to the reference position table 63 and detects a discrete failure of the second position detection sensor (27) based on the car position signal input from the car position detection unit 62. At this time, the failure detection unit 66 determines whether the detected switching state is the same as the switching state corresponding to the position information indicated by the car position signal in the reference position table 63, and if they are not the same, determines that the second position detection sensor (27) is at fault. The safety control device 2 outputs the determination result by the failure detection unit 66 as a failure detection signal.

[0054] The door zone detection unit 67 refers to the door zone position table 68 based on the position information of the car 20 indicated by the car position signal from the car position detection unit 62, and determines whether the current position of the car 20 is within the range of the door zone stored in the door zone position table 68. When the door zone detection unit 67 determines that the current position of the car 20 is within the range of the door zone, the safety control device 2 outputs the determination result by the door zone detection unit 67 as a door zone position signal.

[0055] As will be described later, the door zone position table 68 stores car position information and door zone information in association with each other.

[0056] Here, the table creation start signal and the position correction signal will be described.

[0057] The table creation start signal is a signal that commands the safety controller 2 to start creating the reference position table 63 and the door zone position table 68. The table creation start signal is input to the safety controller 2 from the elevator controller 3 or a maintenance terminal device carried by a maintenance engineer.

[0058] The elevator control device 3 also starts a predetermined operation in response to the table creation start signal. That is, the elevator control device 3 operates the car 20 at a speed slower than the rated speed from the bottom floor to the top floor or from the top floor to the bottom floor in order to measure the landing position of the car 20 at each floor and the height dimension between floors.

[0059] The position correction signal is a signal for providing the safety controller 2 with information on the floor level position of the car 20, which is used when the safety controller 2 calculates the door zone. The position correction signal is input to the safety controller 2 by a maintenance terminal device used by a maintenance engineer.

[0060] In this embodiment, the position correction signal indicates the amount of deviation between the car floor surface and the landing floor surface when the car 20 stops at each floor when the car 20 is operated to measure the landing position and the height dimension between floors. The door zone position creation unit 65 in the safety control device 2 calculates the center position of the door zone based on the position information indicated by the car position signal from the car position detection unit 62 when the car stops and the amount of deviation indicated by the position correction signal. Furthermore, the door zone position creation unit 65 calculates the range of the door zone from this calculated value and the distance from the center position of the door zone set in advance to the upper and lower ends (for example, 150 mm each (FIG. 7)).

[0061] FIG. 4 is a flowchart showing the operation of the reference position storage processing unit 64 (FIG. 3) in the safety control device 2.

[0062] In step S101, the reference position storage processor 64 determines whether a table creation start signal that commands the start of creation of the reference position table 63 is ON. If the reference position storage processor 64 determines that the table creation start signal is ON (YES in step S101), it then executes step S102, and if it determines that the table creation start signal is not ON (NO in step S101), it ends the process.

[0063] In step S102, the reference position storage processing unit 64 accumulates the amount of movement of the car 20 detected by the first position detection sensor (8), i.e., the relative position detection sensor 8, and updates the current car position information to the accumulated value. After executing step S102, the reference position storage processing unit 64 then executes step S103.

[0064] In step S103, the reference position storage processor 64 determines whether the output state of the second position detection sensor (27), i.e., the discrete position detection sensor 27, has changed, i.e., whether the output pattern has switched. If the reference position storage processor 64 determines that the output state has changed (YES in step S103), it then executes step S104, and if it determines that the output state has not changed (NO in step S103), it executes step S102 again.

[0065] In step S104, the reference position storage processor 64 stores the current car position information and the corresponding change in the output state of the second position detection sensor (27) in the reference position table 63. After executing step S104, the reference position storage processor 64 then executes step S105.

[0066] In step S105, the reference position storage processor 64 determines whether the table creation start signal is OFF. If the reference position storage processor 64 determines that the table creation start signal is OFF (YES in step S105), it executes step S106. If the reference position storage processor 64 determines that the table creation start signal is not OFF (NO in step S105), it executes step S102 again.

[0067] In step S105, the reference position storage processing unit 64 completes the creation of the reference position table 63. When the reference position storage processing unit 64 completes the creation of the reference position table 63, it ends the series of processes.

[0068] FIG. 5 shows an example of the reference position table 63.

[0069] The reference position table 63 shown in FIG. 5 is created while the car 20 is operating from the lowest floor to the top floor.

[0070] A change in the output state of the second position detection sensor (27) shown in Fig. 5 indicates that the edge of the detection plate (Fig. 2) is being detected by the second position detection sensor (27). In Fig. 5, from the top, the upper edge (upper end) of the detection plate located on the terminal floor (lowest floor), the upper edge of the detection plate located on the terminal floor (lowest floor), the lower edge of the detection plate located at position a, the upper edge of the detection plate located at position a, the lower edge of the detection plate located at position b, and the upper edge of the detection plate located at position b are detected.

[0071] The car position information shown in FIG. 5 indicates the position of the car 20 calculated based on the amount of movement of the car detected by the first position detection sensor (8) when each edge is detected.

[0072] As shown in FIG. 5, the reference position table 63 stores discrete positions of the car 20 corresponding to the output state of the second position detection sensor (27).

[0073] FIG. 6 is a flowchart showing the operation of the door zone position generation unit 65 (FIG. 3) in the safety control device 2.

[0074] In step S201, the door zone position creation unit 65 determines whether a table creation start signal that commands the start of creation of the door zone position table 68 is ON. If the door zone position creation unit 65 determines that the table creation start signal is ON (YES in step S201), it then executes step S202, and if it determines that the table creation start signal is not ON (NO in step S201), it ends the process.

[0075] In step S202, the door zone position creation unit 65 accumulates the amount of movement of the car 20 detected by the first position detection sensor (8), i.e., the relative position detection sensor 8, and updates the current car position information to the accumulated value. After executing step S202, the door zone position creation unit 65 then executes step S203.

[0076] In step S203, the door zone position creation unit 65 determines whether a position correction signal has been input. If the door zone position creation unit 65 determines that a position correction signal has been input (YES in step S203), it then executes step S204, and if it determines that a position correction signal has not been input (NO in step S203), it executes step S202 again.

[0077] In step S204, the door zone position creation unit 65 calculates the range of the door zone based on the current (i.e., stopped) car position information, the deviation amount indicated by the position correction signal, and a predetermined door zone width. The door zone position creation unit 65 sets the calculated door zone range in the door zone position table 68 in association with the car position information and the deviation amount. After executing step S204, the door zone position creation unit 65 then executes step S205.

[0078] In step S205, the door zone position creation unit 65 judges whether the table creation start signal is OFF. If the door zone position creation unit 65 judges that the table creation start signal is OFF (YES in step S205), it executes step S206, and if it judges that the table creation start signal is not OFF (NO in step S205), it executes step S202 again.

[0079] In step S205, the door zone position creation unit 65 completes the creation of the door zone position table 68. When the door zone position creation unit 65 completes the creation of the reference position table 63, the door zone position creation unit 65 ends the series of processes.

[0080] FIG. 7 shows an example of the door zone position table 68.

[0081] FIG. 7 shows, from the top, the range of each door zone on the lowest floor and on the higher floors.

[0082] The deviation amount indicated by the position correction signal is the distance between the landing floor surface and the car floor surface when the car stops at each floor. The deviation amount value is a positive value when the landing floor surface is located above the car floor surface, and a negative value when the landing floor surface is located below the car floor surface. When the position of the landing floor surface and the position of the car floor surface are the same, the deviation amount is zero.

[0083] In this embodiment, the center position of the door zone is the position of the landing floor surface. The door zone width is 300 mm. Therefore, the door zone extends within a range of ±150 mm from the center position of the door zone, that is, within a range of 150 mm upward and 150 mm downward from the center position of the door zone.

[0084] In this embodiment, the position of the landing floor surface on the lowest floor (first floor) is set as the reference position. In addition, creation of the door zone position table 68 is started when the car 20 is stopped on the lowest floor with the landing floor surface and the car floor surface aligned. Therefore, on the lowest floor, both the car position information and the deviation amount are 0 (zero), as shown in Fig. 7. As a result, the calculated door zone range is "-150mm to +150mm".

[0085] On the second floor, the car position information and offset are 3995 mm and +5 mm, respectively. Since the offset is a positive value, the landing floor surface is located above the car floor surface. Therefore, the center position of the door zone (position of the landing floor surface) is calculated by adding the offset (positive value) to the car position information, which is 4000 mm (3995 mm + (+5 mm)). The range of the door zone is the center position of the door zone ± (door zone width / 2), so it is calculated as 4000 mm ± 150 mm, or "3850 mm to 4150 mm."

[0086] On the third floor, the car position information and deviation amount are 8003 mm and -3 mm, respectively. Since the deviation amount is a negative value, the landing floor surface is located below the car floor surface. Therefore, the center position of the door zone (position of the landing floor surface) is calculated by adding the deviation amount (negative value) to the car position information, which is 8000 mm (8003 mm + (-3 mm)). The range of the door zone is calculated to be 8000 mm ± 150 mm, or "7850 mm to 8150 mm."

[0087] The ranges of the door zones for the other floors are calculated in a similar manner.

[0088] Here, the door zone setting operation by inputting a position correction signal in this embodiment will be described.

[0089] The maintenance engineer commands the elevator control device 3 to move the car 20 to the lowest floor (terminal floor), and stops the car 20 when the car floor surface and the landing floor surface are aligned. After the car 20 stops at the lowest floor, the maintenance engineer operates the maintenance terminal device to input a table creation start signal (ON) to the safety control device 2. The maintenance engineer then commands the elevator control device 3 to move the car 20 from the lowest floor toward the top floor, stopping it at each floor. When the car 20 stops at each floor, the maintenance engineer measures the step between the car floor surface and the landing floor surface, i.e., the amount of deviation. The maintenance engineer sends the measured value of the amount of deviation from the maintenance terminal device to the safety control device 2 as a position correction signal.

[0090] The maintenance engineer moves the car 20 to the top floor, stops it, measures the amount of deviation, transmits a position correction signal, and then turns off the table creation start signal, thereby completing the door zone setting work.

[0091] In this way, the door zone can be set based on the position information of the car detected by the relative position detection sensor 8 and the measured value of the amount of deviation, so that the need for highly accurate mounting and position adjustment of the detection plate is reduced.

[0092] In addition, since the measured value of the deviation is sent as a position correction signal from the maintenance terminal device to the safety control device 2, work can be performed inside the car, thereby improving work efficiency and safety.

[0093] FIG. 8 is a flowchart showing the operation of the failure detection unit 66 (FIG. 3) in the safety controller 2.

[0094] In step S301, the fault detection unit 66 determines whether the table creation start signal that commands the start of creation of the reference position table 63 is OFF, that is, whether the reference position table 63 is not being created. If the fault detection unit 66 determines that the table creation start signal is OFF (YES in step S301), it then executes step S302, and if it determines that the table creation start signal is not OFF (NO in step S301), it ends the process.

[0095] In step S302, the failure detection unit 66 receives current car position information from the car position detection unit 62, and also receives the output state of the discrete second position detection sensor (27) from the reference position detection unit 61. After executing step S302, the failure detection unit 66 then executes step S303.

[0096] In step S303, the fault detection unit 66 determines whether the received current car position and the output state of the second position detection sensor (27) are the same as the definitions in the reference position table 63. If the fault detection unit 66 determines that they are the same (YES in step S303), it then executes step S304, and if it determines that they are not the same (NO in step S303), it then executes step S305.

[0097] In step S304, the failure detection unit 66 determines that the discrete second position detection sensor 27 is normal. After executing step S304, the failure detection unit 66 ends the series of processes.

[0098] In step S305, the failure detection unit 66 determines that the discrete second position detection sensor (27) is abnormal, and transmits a failure detection signal to the elevator control device 3. After executing step S305, the failure detection unit 66 ends the series of processes.

[0099] When the elevator control device 3 receives a failure detection signal from the failure detection unit 66, it brings the car 20 to an emergency stop or moves it to the nearest floor and stops it there.

[0100] In this way, the presence or absence of a malfunction of the discrete second position detection sensor (27) is determined based on the reference position table 63 created in advance, so that a malfunction can be detected in real time while the elevator is traveling.

[0101] Furthermore, as described above, the accumulated value of the movement amount of the car 20 can be corrected based on the reference position table 63 created in advance, so that by providing any number of detectable plates at any location within the elevator shaft, the reliability of the detection position of the car 20 can be ensured.

[0102] In this embodiment, at the terminal floor (lowest floor) which is the reference floor for the position in the elevator shaft, a door zone is also set by the detection plate 50. As a result, if the position information in the elevator control device 3 or the safety control device 2 is lost due to a power outage or the like, the car can be moved to the terminal floor to obtain the reference position information.

[0103] According to the above-mentioned embodiment, the range of the door zone for each floor is calculated in advance based on the position of the car 20 detected by integrating the amount of movement of the car 20, and it is determined whether the current position of the car 20 is within the range of the door zone calculated in advance. This makes it unnecessary or reduces the need for highly accurate attachment and position adjustment of the detection plate. Therefore, the setting of the door zone is facilitated without deteriorating the accuracy of detecting the position of the car.

[0104] Furthermore, when a detection plate is provided to improve the detection accuracy of the position of the car 20, the installation location, number, dimensions, etc. of the detection plate may be arbitrary by acquiring in advance the correspondence between the output of the discrete position detection sensor 27 that detects the detection plate and the discrete positions of the car. For example, only one detection plate may be provided on the reference floor (the lowest floor in the above embodiment) that serves as the reference for the position in the elevator shaft. Therefore, even when a detection plate is provided, the high-precision installation and position adjustment of the detection plate is reduced. Furthermore, since the dimensions and number of the detection plate can be reduced, the risk of the main rope getting caught on the detection plate during an earthquake, etc. can be reduced.

[0105] In addition, by obtaining the correspondence between the output of the discrete position detection sensor 27 that detects the detection plate and the discrete positions of the elevator car, it is possible to detect a failure of the discrete position detection sensor 27 while the elevator is in operation.

[0106] The present invention is not limited to the above-described embodiment, but includes various modified examples. For example, the above-described embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to the embodiment having all of the configurations described. In addition, some of the configurations of the embodiment can be added to, deleted from, or replaced with other configurations.

[0107] For example, the elevator is not limited to the so-called machine room-less elevator shown in FIG. 1, but may be an elevator having a machine room. [Explanation of symbols]

[0108] 2 safety control device, 3 elevator control device, 4 Magnetic contactor, 5 Brake device, 7 Governor, 8 relative position detection sensor, 9 motors, 10 Building power supply, 20 Cars, 21 Main rope, 22 Counterweight, 23 Platform door, 27 Position detection sensor, 30 buffer, 50~54: detection plate, 60 movement amount detection unit, 61 Reference position detection unit, 62 car position detection unit, 63 Reference position table, 64 Reference position storage processing unit, 65 Door zone position creation unit, 66 Fault detection unit, 67 Door zone detector, 68 Door Zone Location Table

Claims

1. A first position detector that detects a movement amount of the elevator car; A control device that detects a position of the car based on an integrated value of the movement amount of the car detected by the first position detector; An elevator position detection system comprising: The control device includes: The range of the door zone for each floor is memorized, An elevator position detection system, comprising: a determining unit that determines whether the detected position of the elevator car is within the range of the stored door zone.

2. 2. The elevator position detection system according to claim 1, The control device includes: An elevator position detection system characterized in that the range of the door zone is calculated from the detected position of the elevator when the elevator stops at each floor, the amount of deviation between the floor surface of the elevator and the landing floor surface of each floor, and a specified width of the door zone.

3. 3. The elevator position detection system according to claim 2, The control device includes: An elevator position detection system, characterized in that the deviation amount is transmitted from a terminal device to the control device.

4. 2. The elevator position detection system according to claim 1, moreover, A detection object provided in the elevator shaft; A second position detector is provided in the car and detects the object to be detected; Equipped with The control device includes: An elevator position detection system characterized in that the position of the car is detected by correcting the integrated value of the movement amount depending on the output state of the second position detector.

5. 5. The elevator position detection system according to claim 4, The control device includes: storing the output state of the second position detector and a discrete position of the car corresponding to the output state; An elevator position detection system, comprising: a step of correcting the integrated value based on the discrete positions of the elevator car that are stored.

6. 6. The elevator position detection system according to claim 5, The control device includes: An elevator position detection system characterized in that, while the elevator car is operating, the position of the elevator car detected in accordance with the output state of the second position detector is stored as the discrete position.

7. 6. The elevator position detection system according to claim 5, The control device includes: An elevator position detection system characterized in that a failure of the second position detector is detected based on the position of the car, the stored discrete positions, and the output of the second position detector input from the second position detector.

8. 2. The elevator position detection system according to claim 1, 2. An elevator position detection system, comprising: a first position detector that is a rotational position detector that rotates in response to movement of the elevator car;

9. 1. An elevator position detection method for detecting a position of an elevator car based on an integrated value of a moving amount of the elevator car, comprising: Calculate in advance the range of the door zone of each floor from the position of the car, the amount of deviation between the floor surface of the car and the landing floor surface of each floor, and a predetermined width of the door zone when the car stops at each floor, An elevator position detection method, comprising: determining whether the detected position of the elevator car is within the range of the door zone calculated in advance.

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